WO2020156184A1 - 获取系统信息的方法及装置 - Google Patents

获取系统信息的方法及装置 Download PDF

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Publication number
WO2020156184A1
WO2020156184A1 PCT/CN2020/072306 CN2020072306W WO2020156184A1 WO 2020156184 A1 WO2020156184 A1 WO 2020156184A1 CN 2020072306 W CN2020072306 W CN 2020072306W WO 2020156184 A1 WO2020156184 A1 WO 2020156184A1
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WO
WIPO (PCT)
Prior art keywords
cells
system information
request
information corresponding
cell
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2020/072306
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English (en)
French (fr)
Inventor
杨晨晨
晋英豪
谭巍
韩锋
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to EP20749259.6A priority Critical patent/EP3905830B1/en
Publication of WO2020156184A1 publication Critical patent/WO2020156184A1/zh
Priority to US17/390,141 priority patent/US20210360517A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/14—Access restriction or access information delivery, e.g. discovery data delivery using user query or user detection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H04W74/0841—Random access procedures, e.g. with 4-step access with collision treatment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/11—Allocation or use of connection identifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/02—Data link layer protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices
    • H04W88/085—Access point devices with remote components

Definitions

  • This application relates to the field of communication technology, and in particular to a method and device for obtaining system information.
  • the terminal In order to access the cell normally, the terminal needs to continue to read one or more types of system information corresponding to the cell after completing the frequency sweep and the cell downlink synchronization.
  • the master information block MasterInformationBlock, MIB
  • system information block type 1 SystemInformationBlockType1, abbreviated as SIB1
  • SIB SystemInformationBlockType1
  • SIB SystemInformationBlock
  • NR new radio
  • the base station may have a separate architecture, that is, the base station includes two parts: a centralized unit (CU for short) and a distributed unit (DU for short).
  • CU centralized unit
  • DU distributed unit
  • One CU can be connected to multiple DUs.
  • the terminal needs to obtain the system information corresponding to the cells under multiple DUs, it needs to send the message 1 (message1, MSG1 for short) or radio resource control (radio resource control) in the random access process to multiple DUs.
  • message 1 messagessage1, MSG1 for short
  • radio resource control radio resource control
  • RRCSystemInfoRequest resource control, RRC for short
  • RRCSystemInfoRequest resource control, RRC for short
  • RRCSystemInfoRequest is a kind of information that can be sent through message 3 (message3, MSG3 for short) in the random access process, and the terminal can only request system information corresponding to one cell at a time .
  • each DU reports the system information request of the terminal to the CU through the F1 interface, and the CU sends the system information requested by the terminal to the DU through the F1 interface, and the DU forwards it to the terminal.
  • the air interface signaling overhead between the terminal and the DU and the F1 interface signaling overhead are relatively large.
  • the embodiments of the application provide a method and device for acquiring system information, which are used to reduce signaling overhead.
  • a method for acquiring system information including: a terminal sends a first request for requesting system information corresponding to N cells to an access network element, and receives from the access network element a first request including M The first response of the system information corresponding to the cell.
  • the M cells include at least a part of the N cells, N is an integer greater than 1, and M is an integer greater than 0.
  • a terminal can only request system information corresponding to one cell at a time. Compared with the existing method of obtaining system information corresponding to a cell, in the method provided in the first aspect, the terminal can obtain information corresponding to multiple cells at once. System information, which can reduce air interface signaling overhead.
  • the first request includes information for indicating N cells and information for indicating the type of system information corresponding to each of the N cells; or, the first request includes information for indicating Information of N cells.
  • This possible implementation manner can enable the access network element to determine the system information corresponding to each cell requested by the terminal.
  • the first response includes information for indicating M cells and system information corresponding to each of the M cells; or, the first response includes information for indicating M cells, Information indicating the type of system information corresponding to each of the M cells and system information corresponding to each of the M cells.
  • This possible implementation can enable the terminal to determine the system information corresponding to each cell requested.
  • the access network element is an access network device, or the access network element is a DU.
  • the terminal is in the idle state, and the first request is MAC CE signaling or message 1 in the random access process or message 3 in the random access process; or, the terminal is in the connected state, and the first request is The request is RRC signaling or MAC CE signaling.
  • a method for acquiring system information including: a DU receives a first request for requesting system information corresponding to N cells from a terminal, and sends a request for the terminal to the first CU according to the first request A second request for system information corresponding to N cells; the DU receives a second response including system information corresponding to M cells from the first CU.
  • the M cells include at least some of the N cells, and M is an integer greater than 0 , N is an integer greater than 1; DU sends a first response to the terminal, and the first response includes system information corresponding to M cells.
  • a terminal can only request system information corresponding to one cell at a time. Compared with the existing method of obtaining system information corresponding to a cell, in the method provided in the second aspect, the terminal can obtain information corresponding to multiple cells at once. System information, which can reduce air interface signaling overhead.
  • the first request and the second request include: information used to indicate the N cells and information used to indicate the type of system information corresponding to each of the N cells; or, the first The request and the second request include: information for indicating N cells.
  • This possible implementation can enable the first CU to determine the system information corresponding to each cell requested by the terminal.
  • the first response includes: information used to indicate M cells and system information corresponding to each of the M cells; or, information used to indicate M cells, and information used to indicate M cells.
  • the second response includes: the information used to indicate the M cells and the information corresponding to each cell in the M cells System information; or, the second response includes information for indicating M cells and information for indicating the type of system information corresponding to each of the M cells; or, the second response includes information for indicating M cells Information, information used to indicate the type of system information corresponding to each of the M cells, and system information corresponding to each of the M cells.
  • This possible implementation can enable the terminal to determine the system information corresponding to each cell requested.
  • the terminal is in an idle state, and the first request is message 3 in the random access process; or, the terminal is in a connected state, and the first request is RRC signaling.
  • a method for obtaining system information including: a DU receives a first request from a terminal, the first request is used to request system information corresponding to N cells, and N is an integer greater than 1; the DU Send a first response to the terminal according to the first request, where the first response includes system information corresponding to M cells, the M cells include at least some of the N cells, and M is greater than 0 Integer.
  • a terminal can only request system information corresponding to one cell at a time. Compared with the existing method of obtaining system information corresponding to a cell, in the method provided in the third aspect, the terminal can obtain information corresponding to multiple cells at once. System information, which can reduce air interface signaling overhead.
  • the first request includes information indicating the N cells and information indicating the type of system information corresponding to each cell in the N cells; or The first request includes information for indicating the N cells.
  • This possible implementation allows the DU to determine the system information corresponding to each cell requested by the terminal.
  • the first response includes information for indicating the M cells and system information corresponding to each of the M cells; or, the first response includes information for Information indicating the M cells, information indicating the type of system information corresponding to each cell in the M cells, and system information corresponding to each cell in the M cells.
  • This possible implementation can enable the terminal to determine the system information corresponding to each cell requested.
  • the method before the DU sends a first response to the terminal according to the first request, the method further includes: the DU locally obtains one or more System information corresponding to the cell.
  • the method before the DU sends the first response to the terminal according to the first request, the method further includes: the DU interacts with the first CU to obtain one or more cell correspondences System information.
  • the terminal is in the idle state, and the first request is MAC CE signaling or message 1 in the random access process; or, the terminal is in the connected state, and the first request It is MAC CE signaling.
  • a method for obtaining system information including: a first CU receives a second request for requesting system information corresponding to N cells for a terminal from a DU, and sends to the DU a second request including M
  • the M cells include at least some of the N cells, M is an integer greater than 0, and N is an integer greater than 1.
  • a terminal can only request system information corresponding to one cell at a time. Compared with the existing method of obtaining system information corresponding to a cell, in the method provided in the fourth aspect, the terminal can obtain information corresponding to multiple cells at once. System information, which can reduce air interface signaling overhead.
  • the second request includes information for indicating the N cells and information for indicating the type of system information corresponding to each cell in the N cells; or, the second request includes information for indicating Information of N cells.
  • This possible implementation can enable the first CU to determine the system information corresponding to each cell requested by the terminal.
  • the second response includes information for indicating M cells and system information corresponding to each of the M cells; or, the second response includes information for indicating M cells and user information.
  • the method before the first CU sends the second response to the DU according to the second request, the method further includes: the first CU locally obtains system information corresponding to one or more cells according to the second request.
  • the method before the first CU sends the second response to the DU according to the second request, the method further includes: the first CU sends a third request to one or more DUs according to the second request, and the third request Used to request system information corresponding to one or more cells; the first CU receives a third response from one or more DUs, and the third response includes system information corresponding to one or more cells.
  • the method before the first CU sends the second response to the DU according to the second request, the method further includes: the first CU sends a fourth request to the second CU according to the second request, and the fourth request is used for Request system information corresponding to one or more cells; the first CU receives a fourth response from the second CU, and the fourth response includes system information corresponding to one or more cells.
  • a method for obtaining system information including: an access network device receives a first request from a terminal, where the first request is used to request system information corresponding to N cells, and N is an integer greater than 1; The access network device sends a first response to the terminal according to the first request, where the first response includes system information corresponding to M cells, and the M cells include at least part of the N cells Cell, M is an integer greater than 0.
  • a terminal can only request system information corresponding to one cell at a time. Compared with the existing method of obtaining system information corresponding to a cell, in the method provided in the fifth aspect, the terminal can obtain information corresponding to multiple cells at once. System information, which can reduce air interface signaling overhead.
  • the first request includes information indicating the N cells and information indicating the type of system information corresponding to each cell in the N cells; or The first request includes information for indicating the N cells.
  • This possible implementation can enable the access network device to determine the system information corresponding to each cell requested by the terminal.
  • the first response includes information for indicating the M cells and system information corresponding to each of the M cells; or, the first response includes information for Information indicating the M cells, information indicating the type of system information corresponding to each cell in the M cells, and system information corresponding to each cell in the M cells.
  • This possible implementation can enable the terminal to determine the system information corresponding to each cell requested.
  • the method before the access network device sends a first response to the terminal according to the first request, the method further includes: the access network device according to the first request Obtain system information corresponding to one or more cells locally.
  • the method before the access network device sends a first response to the terminal according to the first request, the method further includes: the access network device according to the first request Send a fifth request to another access network device, where the fifth request is used to request system information corresponding to one or more cells; the access network device receives a fifth response from the other access network device, the The fifth response includes system information corresponding to one or more cells.
  • the terminal is in an idle state, and the first request is MAC CE signaling or message 1 in the random access process or message 3 in the random access process; or, the terminal In the connected state, the first request is RRC signaling or MAC CE signaling.
  • an apparatus for acquiring system information including: a communication unit and a processing unit; the processing unit is configured to send a first request for system information corresponding to N cells to an access network element through the communication unit Request, N is an integer greater than 1; the processing unit is further configured to receive a first response including system information corresponding to M cells from the access network element through the communication unit, where the M cells include at least some of the N cells , M is an integer greater than 0.
  • the first request includes information for indicating N cells and information for indicating the type of system information corresponding to each of the N cells; or, the first request includes information for indicating Information of N cells.
  • the first response includes information for indicating M cells and system information corresponding to each of the M cells; or, the first response includes information for indicating M cells, Information indicating the type of system information corresponding to each of the M cells and system information corresponding to each of the M cells.
  • the access network element is an access network device, or the access network element is a DU.
  • the apparatus for obtaining system information is in an idle state, and the first request is MAC CE signaling or message 1 in the random access process or message 3 in the random access process; or, to obtain system information
  • the device is in the connected state, and the first request is RRC signaling or MAC CE signaling.
  • an apparatus for acquiring system information including: a communication unit and a processing unit; the processing unit is configured to receive a first request for system information corresponding to N cells from a terminal through the communication unit Request, N is an integer greater than 1; the processing unit is further configured to send system information corresponding to the N cells for the terminal to the first CU through the communication unit according to the first request The processing unit is further configured to receive a second response including system information corresponding to M cells from the first CU through the communication unit, the M cells including at least the N cells For some cells in, M is an integer greater than 0; the processing unit is further configured to send a first response including system information corresponding to the M cells to the terminal through the communication unit.
  • the first request and the second request include: information for indicating the N cells and information for indicating system information corresponding to each of the N cells.
  • Type information or, the first request and the second request include: information used to indicate the N cells.
  • the first response includes: information for indicating the M cells and system information corresponding to each of the M cells; or, for indicating the M cells Cell information, information used to indicate the type of system information corresponding to each cell in the M cells, and system information corresponding to each cell in the M cells;
  • the second response includes: The information of the M cells and the system information corresponding to each of the M cells; or, the second response includes information for indicating the M cells and information for indicating each of the M cells Information about the type of system information corresponding to each cell; or, the second response includes information indicating the M cells and information indicating the type of system information corresponding to each of the M cells System information corresponding to each of the M cells.
  • the terminal is in an idle state, and the first request is Message 3 in a random access process; or, the terminal is in a connected state, and the first request is RRC signaling.
  • an apparatus for acquiring system information including: a communication unit and a processing unit; the processing unit is configured to receive a first request from a terminal through the communication unit, and the first request is used to request N System information corresponding to each cell, N is an integer greater than 1.
  • the processing unit is further configured to send a first response to the terminal through the communication unit according to the first request, and the first response includes M System information corresponding to each cell, the M cells include at least some of the N cells, and M is an integer greater than 0.
  • the first request includes information indicating the N cells and information indicating the type of system information corresponding to each cell in the N cells; or The first request includes information for indicating the N cells.
  • the first response includes information for indicating the M cells and system information corresponding to each of the M cells; or, the first response includes information for Information indicating the M cells, information indicating the type of system information corresponding to each cell in the M cells, and system information corresponding to each cell in the M cells.
  • the processing unit is further configured to locally obtain system information corresponding to one or more cells according to the first request.
  • the processing unit is further configured to interact with the first CU through the communication unit to obtain system information corresponding to one or more cells.
  • the terminal is in the idle state, and the first request is MAC CE signaling or message 1 in the random access process; or, the terminal is in the connected state, and the first request It is MAC CE signaling.
  • an apparatus for acquiring system information including: a communication unit and a processing unit; the processing unit is configured to receive a second request from a DU through the communication unit, and the second request is used to provide a terminal Request system information corresponding to N cells, where N is an integer greater than 1.
  • the processing unit is further configured to send a second response to the DU through the communication unit according to the second request, the second response It includes system information corresponding to M cells, the M cells include at least a part of the N cells, and M is an integer greater than 0.
  • the second request includes information indicating the N cells and information indicating the type of system information corresponding to each cell in the N cells; or The second request includes information for indicating the N cells.
  • the second response includes information for indicating the M cells and system information corresponding to each of the M cells; or, the second response includes information for Information indicating the M cells and information indicating the type of system information corresponding to each cell in the M cells; or, the second response includes information indicating the M cells, Information indicating the type of system information corresponding to each cell in the M cells and system information corresponding to each cell in the M cells.
  • the processing unit is further configured to locally obtain system information corresponding to one or more cells according to the second request.
  • the processing unit is further configured to send a third request to one or more DUs through the communication unit according to the second request, and the third request is used to request one or System information corresponding to multiple cells; the processing unit is further configured to receive a third response from the one or more DUs through the communication unit, where the third response includes system information corresponding to one or more cells.
  • the processing unit is further configured to send a fourth request to the second CU through the communication unit according to the second request, and the fourth request is used to request one or more System information corresponding to a cell; the processing unit is further configured to receive a fourth response from the second CU through the communication unit, where the fourth response includes system information corresponding to one or more cells.
  • an apparatus for obtaining system information including: a communication unit and a processing unit; the processing unit is configured to receive a first request from a terminal through the communication unit, and the first request is used to request N System information corresponding to each cell, N is an integer greater than 1.
  • the processing unit is further configured to send a first response to the terminal through the communication unit according to the first request, and the first response includes M System information corresponding to each cell, the M cells include at least some of the N cells, and M is an integer greater than 0.
  • the first request includes information indicating the N cells and information indicating the type of system information corresponding to each cell in the N cells; or The first request includes information for indicating the N cells.
  • the first response includes information for indicating the M cells and system information corresponding to each of the M cells; or, the first response includes information for Information indicating the M cells, information indicating the type of system information corresponding to each cell in the M cells, and system information corresponding to each cell in the M cells.
  • the processing unit is further configured to locally obtain system information corresponding to one or more cells according to the first request.
  • the processing unit is further configured to send a fifth request to other access network devices through the communication unit according to the first request, and the fifth request is used to request one or System information corresponding to multiple cells; the processing unit is further configured to receive a fifth response from the other access network device through the communication unit, where the fifth response includes system information corresponding to one or more cells.
  • the terminal is in an idle state, and the first request is MAC CE signaling or message 1 in the random access process or message 3 in the random access process; or, the terminal In the connected state, the first request is RRC signaling or MAC CE signaling.
  • an apparatus for obtaining system information including a processor.
  • the processor is connected to the memory, and the memory is used to store computer-executable instructions, and the processor executes the computer-executable instructions stored in the memory, thereby realizing any one of the first aspect, the second aspect, the third aspect, the fourth aspect, or the fifth aspect kind of method.
  • the memory and the processor can be integrated together or can be independent devices. In the latter case, the memory may be located in the device for acquiring system information or outside the device for acquiring system information.
  • the processor includes a logic circuit and an input interface and/or an output interface.
  • the output interface is used to execute the sending action in the corresponding method
  • the input interface is used to execute the receiving action in the corresponding method.
  • the device for acquiring system information further includes a communication interface and a communication bus, and the processor, memory, and communication interface are connected through the communication bus.
  • the communication interface is used to perform the sending and receiving actions in the corresponding method.
  • the communication interface may also be called a transceiver.
  • the communication interface includes a transmitter and a receiver. In this case, the transmitter is used to perform the sending action in the corresponding method, and the receiver is used to perform the receiving action in the corresponding method.
  • the device for acquiring system information exists in the form of a chip product.
  • a communication system including: the apparatus for obtaining system information provided by the first, second, and fourth aspects; or the apparatus for obtaining system information provided by the first and third aspects; Or, the apparatus for acquiring system information provided by the first aspect and the fifth aspect.
  • a computer-readable storage medium including instructions, which when run on a computer, cause the computer to execute the first aspect, the second aspect, the third aspect, the fourth aspect, or the fifth aspect Any one of the methods provided.
  • a computer program product containing instructions is provided.
  • the computer executes the first aspect, the second aspect, the third aspect, the fourth aspect, or the fifth aspect. Any method.
  • FIG. 1 is a schematic diagram of the composition of a network architecture provided by an embodiment of the application
  • FIG. 2 is a flowchart of a method for obtaining system information according to an embodiment of the application
  • 3 to 5 are schematic diagrams of the format of information included in a request provided by an embodiment of the application.
  • 6 and 7 are respectively schematic diagrams of the format of the information included in a response provided by an embodiment of the application.
  • FIGS. 8-10 are flowcharts of a method for obtaining system information provided by embodiments of this application.
  • FIG. 11 is a schematic diagram of the composition of a network architecture provided by an embodiment of this application.
  • FIG. 12 and FIG. 13 are respectively flowcharts of a method for obtaining system information according to an embodiment of the application.
  • FIG. 14 is a schematic diagram of the composition of a network architecture provided by an embodiment of this application.
  • 15 and 16 are respectively flowcharts of a method for obtaining system information according to an embodiment of the application.
  • Figures 17-19 are schematic diagrams of the composition of an apparatus for obtaining system information provided by an embodiment of the application.
  • FIG. 20 is a schematic diagram of the hardware structure of a terminal provided by an embodiment of the application.
  • words such as “first” and “second” are used to distinguish the same items or similar items with substantially the same function and effect.
  • words “first”, “second” and the like do not limit the quantity and execution order, and the words “first” and “second” do not limit the difference.
  • Orthogonal Frequency-Division Multiple Access OFDMA for short
  • Single Carrier Frequency-Division Multiple Access single carrier FDMA
  • SC-FDMA single carrier Frequency-Division Multiple Access
  • the term “system” can be used interchangeably with "network”.
  • the OFDMA system can implement wireless technologies such as evolved universal terrestrial radio access (E-UTRA) and ultra mobile broadband (UMB).
  • E-UTRA is an evolved version of the Universal Mobile Telecommunications System (UMTS).
  • UMTS Universal Mobile Telecommunications System
  • 3rd generation partnership project 3rd generation partnership project uses E-UTRA in long term evolution (LTE) and various versions based on LTE evolution.
  • the fifth-generation (5th-generation, 5G for short) communication system is a next-generation communication system under study.
  • the communication system may also be applicable to future-oriented communication technologies, all of which are applicable to the technical solutions provided in the embodiments of the present application.
  • the network elements involved in the embodiments of the present application include access network equipment and terminals.
  • the terminal can also be called user equipment (UE), terminal equipment, access terminal, user unit, user station, mobile station, remote station, remote terminal, mobile equipment, user terminal, wireless communication equipment, user agent or User device, etc.
  • Terminals can be drones, Internet of Things (IoT) equipment (for example, sensors, electricity meters, water meters, etc.), vehicle-to-everything (V2X) equipment, and wireless local area networks (wireless local area networks) , WLAN for short), stations (ST), cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (wireless local loop, WLL) stations, personal digital processing Personal digital assistant (PDA) devices, handheld devices with wireless communication functions, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices (also known as wearable smart devices).
  • IoT Internet of Things
  • V2X vehicle-to-everything
  • WLAN wireless local area networks
  • ST stations
  • ST cellular phones
  • cordless phones session initiation protocol (SIP) phones
  • the terminal may also be a terminal in a next-generation communication system, for example, a terminal in a 5G communication system or a terminal in a public land mobile network (PLMN for short) that will evolve in the future, or a terminal in an NR communication system.
  • a next-generation communication system for example, a terminal in a 5G communication system or a terminal in a public land mobile network (PLMN for short) that will evolve in the future, or a terminal in an NR communication system.
  • PLMN public land mobile network
  • the access network equipment can be various forms of macro base stations, micro base stations (also called small stations), relay stations, access points (APs for short), etc., and can also include various forms of control nodes, such as network control Device.
  • the control node may be connected to multiple base stations, and configure resources for multiple terminals covered by the multiple base stations.
  • the names of devices with base station functions may be different, for example, global system for mobile communication (GSM) or code division multiple access (code division multiple) Access, CDMA for short) can be called base transceiver station (BTS for short) in a network, and it can be called a base station (NodeB) in wideband code division multiple access (WCDMA for short), and in LTE systems It can be called an evolved NodeB (eNB or eNodeB for short), and it can be called a next generation node base station (gNB) in a 5G communication system or NR communication system.
  • GSM global system for mobile communication
  • CDMA code division multiple access
  • BTS base transceiver station
  • NodeB wideband code division multiple access
  • gNB next generation node base station
  • the access network equipment can also be the wireless controller in the cloud radio access network (CRAN) scenario, the access network equipment in the future evolved PLMN network, and the transmission and reception point (abbreviation) TRP) etc.
  • CRAN cloud radio
  • CU has the functions of service data adaptation protocol (SDAP) layer, packet data convergence protocol (PDCP) layer and RRC layer;
  • DU has radio link control (radio link control, abbreviated as RLC) layer, medium access control (MAC) layer and physical (PHY) layer.
  • SDAP service data adaptation protocol
  • PDCP packet data convergence protocol
  • RRC radio link control
  • An access network device can include one CU and multiple DUs, and the F1 interface is used to connect between the CU and the DU.
  • CU is connected with other access network equipment using Xn interface.
  • the CU is connected with the core network (5G core, 5GC for short) of the 5G communication network through an NG interface.
  • 5G core, 5GC for short the core network of the 5G communication network
  • the standard stipulates that one CU can be connected to multiple DUs, and one DU can only be connected to one CU. In the implementation process, considering the stability of the system, one DU can be connected to multiple CUs.
  • the access network includes multiple access network devices, and multiple access network devices can all adopt a separate architecture or a centralized architecture (that is, access network devices that are not split into two parts: CU and DU) , You can also use a separate architecture partly and partly a centralized architecture.
  • the access network device 1 and the access network device 2 adopt a separate architecture
  • the access network device 3 adopts a centralized architecture.
  • the DU and the access network equipment can cover one cell or multiple cells. Exemplarily, refer to Table 1. Table 1 shows the correspondence between the DU and the access network device and the covered cell under the network architecture shown in FIG. 1.
  • the function of the system information is mainly to inform the terminal cell configuration information so that the terminal can access the cell and work correctly in the cell.
  • system information is divided into minimum (Minimum) system information and other (Other) system information.
  • Minimum system information includes MIB and SIB1 information
  • Other system information includes SIB2 and above system information.
  • MIB, SIB1 and SIB2-SIB21 have been defined.
  • Each system information contains a series of parameter sets related to a certain function. Among them, MIB contains some limited but the most important and frequently used parameters, such as uplink and downlink bandwidth, physical hybrid automatic repeat-request (ARQ) indicator channel (physical hybrid-ARQ indicator).
  • ARQ physical hybrid automatic repeat-request
  • SIB1 of LTE mainly contains information related to cell selection and camping, such as PLMN, cell barring status, cell selection parameters, closed subscriber group (CSG) identification, etc.
  • SIB1 also contains other SIB scheduling Information, the terminal obtains SIB2 and above system information based on the information in SIB1.
  • SIB2 of LTE mainly contains the wireless resource configuration information common to the cell, which is common to terminals.
  • the SIB9 of LTE contains the name information of the home base station.
  • the SIBx of the NR system does not correspond to the SIBx of LTE.
  • SIB1 of NR corresponds to the functions of LTE SIB1 and SIB2
  • NR SIB2-SIB9 corresponds to the functions of LTE SIB3-SIB6, SIB10-SIB12, and SIB16 in turn.
  • the system information with the same function in LTE and NR may or may not include the same information element.
  • x in SIBx refers to the type of SIB
  • SIBx refers to SIB of type x
  • x in type x refers to the identifier of the type (also referred to as index or serial number).
  • SIB5 refers to type 5 SIB.
  • Type 5 refers to the type identified as 5.
  • x is an integer.
  • the terminal In order to access the cell normally, the terminal needs to continue to read one or more types of system information corresponding to the cell after completing the frequency sweep and synchronization of the downlink cell.
  • the two types of system information, MIB and SIB1 are generally broadcast periodically by network elements of the access network, and other types of SIBs can be selectively broadcast periodically.
  • the system information that is periodically broadcast can be obtained in time.
  • the MIB is broadcast on a physical broadcast channel (physical broadcast channel, PBCH for short), and other types of system information (SIB1 and other SIBs that need to be broadcast) are broadcast on a physical downlink shared channel (PDSCH for short).
  • the MIB contains the time-frequency information sent by SIB1.
  • the terminal After receiving the MIB on the PBCH channel, the terminal receives SIB1 on the PDSCH according to the time-frequency information indicated in the MIB. SIB1 will indicate the scheduled time-frequency information of SIB2-SIBx. After reading SIB1, the terminal receives other SIBs on the PDSCH according to the time-frequency information indicated in SIB1.
  • NR adds a new way for terminals to obtain system information: On-Demand acquisition. Specifically, it can be obtained through On-Demand Request (On-Demand Request), that is, when the terminal finds that some system information is not broadcast, and the terminal needs this system information, the terminal can actively send a request to the access network element, and the access network The network element can then send system information to the terminal.
  • On-Demand Request On-Demand Request
  • the access network element can also send system information through RRC signaling.
  • the RRC signaling may be RRC reconfiguration (RRCReconfiguration) signaling.
  • the two methods for the terminal to obtain system information on demand are: 1.
  • the terminal sends a preamble in MSG1, and the preamble has a mapping relationship with the type of system information required by the terminal.
  • the access network element After the access network element receives MSG1, it can parse out the system information required by the terminal according to the Preamble and the mapping relationship carried by MSG1, and then send the system information required by the terminal to the terminal; 2.
  • the terminal sends RRCSystemInfoRequest signaling to the access
  • the network element requests the required system information, the RRCSystemInfoRequest signaling carries information elements of the type of system information required by the terminal, and the access network element then sends the system information required by the terminal to the terminal.
  • RRCSystemInfoRequest is a kind of information that can be sent through MSG3 in the random access process.
  • LTE defines the concept of a CSG cell, and only terminals with corresponding permissions can access the CSG cell. If a terminal wants to access a CSG cell, it must first determine whether a cell is a CSG cell. This is achieved by the terminal receiving SIB1.
  • the SIB1 of LTE contains the parameters CSG indication (CSG indication) and CSG ID (CSG Identity), which respectively identify the corresponding Whether the cell is a CSG cell and the ID of the corresponding CSG cell.
  • CSG indication CSG indication
  • CSG ID CSG Identity
  • the terminal needs to display the names of the Femtocells available for selection to the user in the form of a list, and the names of Femtocells in LTE are included in SIB9 (Note: The NR standard has not yet defined which system information the Femtocell name is included in).
  • the process for the terminal to display the list of home base stations can be roughly summarized as follows: After the terminal determines that a cell is a CSG cell by receiving SIB1, it receives SIB9 from the PDSCH channel of the cell based on the time-frequency information of SIB9 indicated in SIB1, and then from SIB9 Read the name of the corresponding Femtocell and add the Femtocell's name to the list of options.
  • the system information containing the name of the Femtocell is not always broadcasted, so when the user needs the name of the Femtocell, the SIB containing the name of the Femtocell can be obtained in the NR through on-demand acquisition.
  • each DU reports the system information request of the terminal to the CU through the F1 interface, and the CU sends the corresponding system information to the DU through the F1 interface, and the DU forwards it to the terminal.
  • the embodiments of this application provide a method for obtaining system information.
  • the method can be applied to obtain system information corresponding to ordinary cells, and can also be applied to systems corresponding to CSG cells/closed access group (CAG) cells Information acquisition.
  • the system information corresponding to the CSG cell can include CSG indication (information used to indicate whether it is a CSG cell, which may be other names specifically), CSG ID (used to indicate a CSG cell, which may be other names specifically), family Information such as the name of the base station.
  • the system information corresponding to the CAG cell can include CAG indication (information used to indicate whether it is a CAG cell, specifically other names), CAG ID (used to indicate CAG cells, specifically other names), and CAG base station information Name and other information.
  • ordinary cells refer to cells other than CSG cells and CAG cells.
  • the method for obtaining system information includes:
  • a terminal sends a first request to an access network element, where the first request is used to request system information corresponding to N cells, and N is an integer greater than 1.
  • the access network element is an access network device, or the access network element is a DU.
  • the N cells may be cells covered by the same access network device.
  • the N cells may be cell 7, cell 8, and cell 9 covered by the access network device 3.
  • the N cells may be cells covered by the same DU.
  • the N cells may be cell 1 and cell 2 covered by DU11.
  • the N cells may also be cells covered by different DUs, and the different DUs may be connected to the same CU or different CUs.
  • the N cells may be cell 1, cell 2 and cell 4 covered by DU11.
  • the N cells may be cell 1 and cell 2 covered by DU11 and cell 3 covered by DU12.
  • the system information corresponding to a cell in the embodiment of the present application refers to the system information that the terminal does not receive but needs to obtain, that is, the system information corresponding to a cell refers to the On-Demand system information of the cell.
  • the types of system information corresponding to different cells among the N cells may be the same or different.
  • the types of system information corresponding to different cells among the N cells may all be SIB types. 5.
  • the types of system information corresponding to different cells among the N cells are different, if the N cells are cell 1 and cell 2, the type of system information corresponding to cell 1 can be SIB type 5, and cell 2 corresponds to The type of system information can be type 7 of SIB.
  • the number of system information corresponding to different cells among the N cells may be the same or different.
  • the system information corresponding to cell 1 may be SIB5, and the system information corresponding to cell 2 Can be SIB9.
  • the system information corresponding to cell 1 can be SIB5 and SIB7, and the system information corresponding to cell 2 Can be SIB9.
  • the terminal receives a first response from an access network element, where the first response includes system information corresponding to M cells, the M cells include at least some of the N cells, and M is an integer greater than 0.
  • a terminal can only request system information corresponding to one cell at a time.
  • the terminal can obtain the corresponding system information of multiple cells at a time.
  • the system information can improve signaling interaction efficiency and reduce air interface signaling overhead.
  • the first request includes information used to indicate the N cells and information used to indicate the type of system information corresponding to each of the N cells; or, the first request includes information used to indicate the N cells ; Or, the first request includes information for indicating the type of system information corresponding to each of the N cells; or, the first request includes indication information and information for indicating the type of system information, and the indication information is used to indicate Whether to request system information corresponding to multiple cells.
  • the first request includes information for indicating N cells and information for indicating the type of system information corresponding to each of the N cells, information for indicating N cells and information for indicating N cells There is a one-to-one correspondence between the types of system information corresponding to each cell in the cell.
  • the type of system information corresponding to each cell in the N cells may be preset or carried to the access network element through other messages.
  • the information indicating the N cells may be preset or carried to the access network through other messages. Yuan.
  • the access network element may send system information corresponding to one or more cells to the terminal based on the product implementation. For example, when the first request includes the indication information and the type of system information (for example, SIB9 in LTE) that carries the information of the home base station, the access network element may assign all CSG cells to the system that carries the information of the home base station. The information is sent to the terminal.
  • the indication information can be indicated by the value of one bit, and different values of the bit have different meanings.
  • the indication information is used to indicate the request for system information corresponding to multiple cells, and when the value of the bit is 0, the indication information is used to indicate the request for system information corresponding to a single cell .
  • the indication information can also be indicated by multiple bits, which is not specifically limited in the embodiment of the present application.
  • the information used to indicate a cell in the embodiments of the present application refers to information that uniquely identifies the cell, and may be referred to as a cell unique identifier.
  • the unique identifier of a cell may be the cell global identifier (CGI) of the cell.
  • CGI cell global identifier
  • the CGI may be called NR CGI.
  • the unique identifier of the CSG cell may be the CSG ID.
  • the unique identification of the CAG cell can be the CAG ID.
  • the information used to indicate a cell is a unique identifier of the cell
  • the information used to indicate N cells may be a cell unique identifier list, and the cell unique identifier list includes the unique identifiers of the N cells.
  • the information used to indicate the type of system information corresponding to a cell in the embodiment of the present application may be an identifier of the type of system information corresponding to the cell.
  • the information used to indicate the types of system information corresponding to the N cells may be a system information type identification list, and the system information type identification list includes the types of system information corresponding to the N cells.
  • the terminal is in an idle state, and the first request is MAC control element (MAC CE) signaling or message 1 in the random access process or message 3 in the random access process; or, the terminal is in In the connected state, the first request is RRC signaling or MAC CE signaling.
  • MAC CE MAC control element
  • the message 3 may be RRCSystemInfoRequest.
  • the cell unique identifier list and the system information type identifier list may be in the format shown in FIG. 3, or may be in the format shown in FIG. 4.
  • the cell unique identifier list may be in the format shown in FIG. 5, that is, corresponding data is added after the Preamble, and the data is used to carry the cell unique identifier list.
  • the Preamble has a mapping relationship with the type of system information required by the terminal, and the Preamble may have a mapping relationship with one type of system information, or may have a mapping relationship with multiple types of system information.
  • the unique identifiers of cell 1, cell 2, cell 3, and cell 4 are NR CGI 1, NR CGI 2, NR CGI 3, and NR CGI 4 in FIG. 5, respectively.
  • Preamble may have a mapping relationship with system information type 5.
  • the meaning of the example shown in FIG. 5 may be that the terminal needs to obtain each of cell 1, cell 2, cell 3, and cell 4.
  • SIB5 corresponding to each cell may be that the terminal needs to obtain each of cell 1, cell 2, cell 3, and cell 4.
  • Preamble may have a mapping relationship with Type 5 and Type 6 of the system information.
  • the meaning of the example shown in Figure 5 may be that the terminal needs to obtain cell 1, cell 2, cell 3, and cell SIB5 and SIB6 corresponding to each cell in 4.
  • the first response includes information used to indicate M cells and system information corresponding to each of the M cells; or, the first response includes information used to indicate M cells and indicates M cells The type of system information corresponding to each cell in and the system information corresponding to each cell in the M cells.
  • the first response includes the information used to indicate the M cells and the system information corresponding to each cell in the M cells
  • the information used to indicate the M cells and the system corresponding to each cell in the M cells There is a one-to-one correspondence between information.
  • the first response includes information indicating M cells, information indicating the type of system information corresponding to each of the M cells, and system information corresponding to each of the M cells
  • the information used to indicate M cells may be a list of cell unique identifiers, and the list of cell unique identifiers includes the unique identifiers of M cells.
  • the information used to indicate the types of system information corresponding to the M cells may be a system information type identifier list, and the system information type identifier list includes the types of system information corresponding to the M cells.
  • the system information corresponding to the M cells may be a system information list, and the system information list includes the system information corresponding to the M cells.
  • the cell is unique
  • the identification list, the system information type identification list, and the system information list may be in the format shown in Case 1 in FIG. 6 or FIG. 7.
  • the cell unique identification list and the system information list may be as shown in Case 2 in FIG. 6 and FIG. 7 format.
  • the unique identifier of the cell is NR CGI as an example for description.
  • the system information type identification list can be represented by a multi-bit code or a character string.
  • the type of system information requested by the terminal can be indicated by multiple bits. In a possible implementation manner, some or all of the multiple bits are used to indicate a type of system information. For example, every three bits in the multiple bits indicate a type of system information. Assuming that the multiple bits are 011110, it indicates that the types of system information requested by the terminal are type 3 and type 7. Another possible implementation is that one of the multiple bits is used to indicate whether the type of one system information is requested, and when the value of one bit is 1 (or 0), it indicates the system information corresponding to the bit The type is requested.
  • one bit is used to indicate whether one of the 10 system information types is requested. Assuming that the value of the bit is 1, it means that the type of system information corresponding to the bit is requested. If the 10 bits are 1100011000, it means the first, second, and sixth of the 10 types of system information The type of the first and seventh system information is requested.
  • the terminal obtains the unique identities of the N cells and the type of system information corresponding to each of the N cells, and according to the unique identities of the N cells and each of the N cells
  • the type of system information corresponding to the cell sends a first request to the access network element.
  • the terminal in the idle state can obtain the cell ID and PLMN ID of the cell according to SIB1, and determine the CGI of the cell according to the Cell ID and PLMN ID.
  • the connected terminal can obtain the Cell ID and PLMN ID of the cell according to SIB1 or RRC signaling, and then determine the CGI of the cell.
  • the unique identity of the cell can be obtained locally, and the manner in which the terminal obtains the unique identity of the cell is not specifically limited in the embodiment of the present application.
  • the terminal Before the terminal sends the first request to the access network element, the terminal may generate a cell unique identifier list according to the unique identifiers of the N cells, and generate a system information type identifier list according to the type of system information corresponding to each of the N cells.
  • the above method may further include:
  • the terminal sends a request for system information corresponding to N2 cells to other access network elements, where the N2 cells are cells other than the N1 cells among the N cells, and N1 and N2 is an integer greater than zero.
  • the terminal Before step 203, the terminal can determine whether the M cells include N cells, and if not, perform step 203. If after step 203, the terminal has not obtained the system information corresponding to all the cells in the N cells, the terminal may also request the system information corresponding to the cells from other access network elements until all the system information in the N cells is obtained. System information corresponding to the cell.
  • step 203 may be access network equipment or DU, which is not specifically limited in the embodiment of the present application.
  • the access network equipment and the DU are regarded as two different types of access network network elements.
  • the MAC CE signaling, message 1, message 3, RRC signaling, etc. are regarded as different signaling types of the first request.
  • the specific implementation process of the above method is slightly different. In order to explain this application more clearly, the above implementation will be implemented through the following embodiment 1 to embodiment 3. The method provided in the example is further explained.
  • the same or related content in the first to third embodiments as the above-mentioned embodiment please refer to the above, and will not be repeated.
  • the access network element is a DU, the terminal is in an idle state, and the first request is message 3 in the random access process.
  • the access network element is a DU, the terminal is in a connected state, and the first request is RRC signaling.
  • the DU cannot parse the information contained in the first request.
  • the method provided in the first embodiment includes:
  • the terminal sends a first request to a DU (denoted as the first DU), where the first request is used to request system information corresponding to N cells.
  • the first DU receives the first request from the terminal.
  • the first DU sends a second request to the first CU according to the first request, where the second request is used to request system information corresponding to the N cells for the terminal.
  • the first CU receives the second request from the first DU.
  • the first CU may be a CU connected to the first DU. Since the first DU cannot parse the information contained in the first request, the first DU may directly carry the information contained in the first request in the second request and send it to the first CU.
  • the first CU sends a second response to the first DU according to the second request, where the second response includes system information corresponding to the M cells, and the M cells include at least some of the N cells.
  • the first DU receives the second response from the first CU.
  • the second request and the second response may be F1 interface messages.
  • the second request may be the initial uplink RRC message transfer (Initial UL RRC Message Transfer), and the second response may be the system information transmission command (System Information Delivery). Command).
  • the first DU sends a first response to the terminal, where the first response includes system information corresponding to the M cells.
  • the terminal receives the first response from the first DU, thereby obtaining system information corresponding to the M cells according to the first response.
  • the first DU may directly carry the information contained in the second response in the first response and send it to the terminal.
  • the first DU may send the first response to the terminal in a broadcast manner.
  • the first DU may send the first response to the terminal in a broadcast manner or RRC signaling.
  • a terminal can only request system information corresponding to one cell at a time.
  • the terminal can obtain the corresponding system information of multiple cells at a time.
  • the system information can improve signaling interaction efficiency and reduce air interface signaling overhead.
  • the second request includes: information used to indicate the N cells and information used to indicate the type of system information corresponding to each of the N cells; or, information used to indicate the N cells; or, Information used to indicate the type of system information corresponding to each of the N cells; or, indication information and information used to indicate the type of system information, and the indication information is used to indicate whether to request system information corresponding to multiple cells.
  • the second response includes: information used to indicate the M cells and system information corresponding to each of the M cells; or, information used to indicate the M cells and information used to indicate the M cells Information about the type of system information corresponding to each cell in a cell; or, information indicating the M cells, information indicating the type of system information corresponding to each cell in the M cells, and System information corresponding to each cell in the M cells.
  • the format of the information contained in the second request and the second response please refer to the format of the information contained in the first request and the first response, respectively.
  • the second response includes information indicating the M cells and information indicating the type of system information corresponding to each cell in the M cells
  • the format of the information contained in the second response is the same as Figure 3 is similar and will not be repeated here.
  • the first DU may locally store multiple cell correspondences. System information, but the first DU cannot parse the first request sent by the terminal. At this time, the first CU only needs to inform the first DU of the type of system information corresponding to the M (or N) cells through the second response, and the first DU will use the system information corresponding to the M (or N) cells. The type determines the system information corresponding to M (or N) cells, and feeds back to the terminal through the first response.
  • the method further includes: the first CU locally obtains system information corresponding to one or more cells according to the second request. Wherein, the one or more cells belong to M cells.
  • the method further includes:
  • the first CU sends a third request to one or more DUs according to the second request, and the third request is used to request system information corresponding to one or more cells.
  • one or more DUs receive the third request from the first CU.
  • One or more DUs send a third response to the first CU according to the third request, and the third response includes system information corresponding to one or more cells.
  • the first CU receives the third response from one or more DUs.
  • the information contained in the third request is similar to the information contained in the second request
  • the information contained in the third response is similar to the information contained in the second response.
  • the format of the information contained in the third request and the third response please refer to the format of the information contained in the second request and the second response respectively, which will not be repeated here.
  • system information corresponding to one or more cells included in the third response may be system information corresponding to some or all of the one or more cells requested by the third request.
  • the system information corresponding to one or more cells included in the third response is system information corresponding to some or all of the M cells.
  • one or more DUs may include the first DU, or may not include the first DU.
  • the one or more DUs may be DUs that have an F1 interface connection with the first CU.
  • the third request and the third response may be F1 interface messages.
  • the third request may be an F1 setup request (F1 Setup Request) or a gNB-CU Configuration Update (gNB-CU Configuration Update)
  • the third response may be F1 Setup response (F1 Setup Response) or gNB-CU Configuration Update Acknowledge (gNB-CU Configuration Update Acknowledge).
  • step 11) and step 12) may be executed after the first CU receives the second request from the first DU, or may be executed before, which is not limited in the embodiment of the present application.
  • the method further includes:
  • the first CU sends a fourth request to the second CU according to the second request, where the fourth request is used to request system information corresponding to one or more cells.
  • the second CU receives the fourth request from the first CU.
  • the second CU sends a fourth response to the first CU according to the fourth request, where the fourth response includes system information corresponding to one or more cells.
  • the first CU receives the fourth response from the second CU.
  • the information contained in the fourth request is similar to the information contained in the second request
  • the information contained in the fourth response is similar to the information contained in the second response.
  • the format of the information contained in the fourth request and the fourth response please refer to the format of the information contained in the second request and the second response, which will not be repeated here.
  • system information corresponding to one or more cells included in the fourth response may be system information corresponding to some or all of the one or more cells requested by the fourth request.
  • the system information corresponding to one or more cells included in the fourth response is system information corresponding to some or all of the M cells.
  • the second CU may be a CU having an Xn connection with the first CU.
  • the fourth request and the fourth response may be Xn messages.
  • the fourth request may be Xn Setup Request or NG-RAN node Configuration Update (NG-RAN node Configuration Update)
  • the fourth response may Create a response for Xn (Xn Setup Response) or next-generation wireless network node configuration update confirmation (NG-RAN node Configuration Update Acknowledge).
  • step 21) and step 22) may be executed after the first CU receives the second request from the first DU, or may be executed before, which is not limited in the embodiment of the present application.
  • step 11) and step 12) can be performed after step 21) and step 22), or can be performed before, which is not limited in the embodiment of the present application.
  • step 803 the actions performed by the first CU may be different in different situations, and the following descriptions will be made separately based on case 1 and case 2.
  • the first DU requests system information corresponding to N cells.
  • the first CU feeds back the system information corresponding to the cell to the first DU, it only feeds back the system information corresponding to the cell requested by the first DU.
  • the first CU may send the system information corresponding to some or all of the N cells to the first DU.
  • the system information corresponding to any cell in the first CU may be generated by the first CU, or may be obtained by the first CU from another device (for example, a DU or a second CU) and stored in the first CU.
  • the first CU can request the system information corresponding to the N2 cells from the connected DU or other CU, and The system information corresponding to the requested cell and the system information corresponding to the N1 cells in the first CU are sent to the first DU.
  • N2 cells are cells other than N1 cells among the N cells, the system information corresponding to the requested cell and the system information corresponding to the N1 cells in the first CU, that is, the system information corresponding to the M cells,
  • the system information corresponding to the M cells may be sent to the first DU once or multiple times. For example, the first CU first sends the acquired system information corresponding to the N1 cells to the first DU, and then sends the system information corresponding to the cells requested from the connected DU or other CUs to the first DU.
  • the first CU can request the system information corresponding to the N cells from the connected DU or other CU, and send the system information corresponding to the requested cell Sent to the first DU.
  • the system information corresponding to the requested cell is the system information corresponding to the M cells.
  • the terminal may continue to request system information corresponding to cells other than M among the N cells from other DUs, until the system information corresponding to the N cells is obtained.
  • the first DU requests the system information corresponding to the N cells, and the first CU feeds back the system information corresponding to the cell requested by the first DU and the system information corresponding to the cell not requested by the first DU.
  • the system information corresponding to the S cells is the system information corresponding to the cells not requested by the first DU but sent by the first CU.
  • the first CU may send the system information corresponding to some or all of the N+S cells to the first DU.
  • N+S cells are the sum of N cells and S cells.
  • the first CU may request the system information corresponding to X2 cells from the connected DU or other CU, And send the system information corresponding to the requested cell and the system information corresponding to the X1 cells in the first CU to the first DU.
  • X2 cells are cells other than X1 cells among the N+S cells, and the system information corresponding to the requested cell and the system information corresponding to the X1 cells in the first CU, that is, the system corresponding to the M cells Information, the system information corresponding to the M cells can be sent to the first DU one or more times.
  • the first CU first sends the acquired system information corresponding to X1 cells to the first DU, and then sends the system information corresponding to the cell requested from the connected DU or other CU to the first DU.
  • the first CU can request the system information corresponding to the N+S cells from the connected DU or other CU, and send the requested cell
  • the corresponding system information is sent to the first DU.
  • the system information corresponding to the requested cell is the system information corresponding to the M cells.
  • the terminal may continue to request system information corresponding to cells other than the received cell among the N cells from other DUs.
  • the access network element is DU, the terminal is in an idle state, and the first request is MAC CE signaling or message 1 in the random access process.
  • the access network element is the DU, the terminal is in the connected state, and the first request is MAC CE signaling.
  • the DU can parse the information contained in the first request.
  • the method provided in the second embodiment includes:
  • the terminal sends a first request to the DU, where the first request is used to request system information corresponding to N cells.
  • the DU receives the first request from the terminal.
  • the DU sends a first response to the terminal according to the first request, where the first response includes system information corresponding to the M cells, and the M cells include at least some of the N cells.
  • the terminal receives the first response from the DU, thereby obtaining system information corresponding to the M cells according to the first response.
  • the DU may send the first response to the terminal by means of broadcast or MAC CE.
  • the DU can send the first response to the terminal by means of broadcast or RRC signaling or MAC CE signaling.
  • a terminal can only request system information corresponding to one cell at a time.
  • the terminal can obtain the corresponding system information of multiple cells at a time.
  • the system information can improve signaling interaction efficiency and reduce air interface signaling overhead.
  • the method may further include: the DU locally obtains system information corresponding to one or more cells according to the first request. Wherein, the one or more cells belong to M cells.
  • the method further includes: 11) the DU interacts with the first CU to obtain system information corresponding to one or more cells.
  • the first CU may be a CU connected to the DU.
  • the one or more cells belong to M cells.
  • step 11) may include:
  • the DU sends a sixth request to the first CU according to the first request, and the sixth request is used to request system information corresponding to one or more cells.
  • the first CU receives the sixth request from the DU.
  • the first CU sends a sixth response to the DU according to the sixth request, where the sixth response includes system information corresponding to one or more cells.
  • the DU receives the sixth response from the first CU.
  • the sixth request and the sixth response may be F1 interface messages.
  • the sixth request may be the initial uplink RRC message transfer (Initial UL RRC Message Transfer)
  • the sixth response may be the system information transmission command (System Information Delivery). Command).
  • the information contained in the sixth request is similar to the information contained in the second request
  • the information contained in the sixth response is similar to the information contained in the second response.
  • the format of the information contained in the sixth request and the sixth response please refer to the format of the information contained in the second request and the second response respectively, which will not be repeated here.
  • system information corresponding to one or more cells included in the sixth response may be system information corresponding to some or all of the one or more cells requested by the sixth request.
  • the system information corresponding to one or more cells included in the sixth response is system information corresponding to some or all of the M cells.
  • step 902 the actions performed by each network element may be different in different situations, and the following descriptions will be made separately based on case 3 and case 4.
  • Case 3 The terminal requests the system information corresponding to the N cells.
  • the DU feeds back the system information corresponding to the cell to the terminal, it only feeds back the system information corresponding to the cell requested by the terminal.
  • the DU may send the system information corresponding to some or all of the N cells to the terminal.
  • the system information corresponding to any cell in the DU may be generated by the DU, or may be obtained by the DU from another device (for example, the first CU) and stored in the DU.
  • the DU can request the system information corresponding to the N2 cells from the first CU, and the system corresponding to the requested cell
  • the information and the system information corresponding to the N1 cells in the DU are sent to the terminal.
  • N2 cells are cells other than N1 cells among the N cells, the system information corresponding to the requested cell and the system information corresponding to the N1 cells in the DU, that is, the system information corresponding to the M cells, M
  • the system information corresponding to the cell can be sent to the terminal one or more times. For example, the DU first sends the acquired system information corresponding to the N1 cells to the terminal, and then sends the system information corresponding to the cell requested from the first CU to the terminal.
  • the DU may request the system information corresponding to the N cells from the first CU, and send the system information corresponding to the requested cell to the terminal.
  • the system information corresponding to the requested cell is the system information corresponding to the M cells.
  • the terminal may continue to request system information corresponding to cells other than M among the N cells from other DUs, until the system information corresponding to the N cells is obtained.
  • Case 4 The terminal requests the system information corresponding to the N cells, and the DU feeds back the system information corresponding to the cell requested by the terminal and the system information corresponding to the cell not requested by the terminal.
  • the system information corresponding to the S cells is the system information corresponding to the cells that are not requested by the terminal but sent by the DU.
  • the DU can send the system information corresponding to some or all of the N+S cells to the terminal.
  • N+S cells are the sum of N cells and S cells.
  • the DU can request the system information corresponding to X2 cells from the first CU, and correspond to the requested cell
  • the system information corresponding to the X1 cells in the DU is sent to the terminal.
  • X2 cells are cells other than X1 cells among the N+S cells, the system information corresponding to the requested cell and the system information corresponding to the X1 cells in the DU, that is, the system information corresponding to the M cells
  • the system information corresponding to the M cells can be sent to the terminal one or more times. For example, the DU first sends the acquired system information corresponding to X1 cells to the terminal, and then sends the system information corresponding to the cell requested from the first CU to the terminal.
  • the DU can request the system information corresponding to the N+S cells from the first CU, and send the system information corresponding to the requested cell to the terminal .
  • the system information corresponding to the requested cell is the system information corresponding to the M cells.
  • the terminal may continue to request system information corresponding to cells other than the received cell among the N cells from other DUs.
  • case 3 and case 4 after the first CU receives the request sent by the DU for requesting system information corresponding to one or more cells, it can feed back to the DU in the manner of case 1 and case 2 in the first embodiment The system information corresponding to the cell will not be repeated here.
  • the terminal after obtaining the system information corresponding to some of the N cells, the terminal also needs to request other DUs for the system information corresponding to other cells in the N cells, so that the system information is obtained
  • the time delay is longer.
  • the DU can add CU identification and/or DU identification to the broadcast cell information, for example, add CU identification and/or DU identification to MIB or SIB1, and the terminal can determine whether multiple cells are They belong to the same CU or DU, and can then synchronously send a request for obtaining system information corresponding to the cell to a DU connected to each CU, thereby reducing the time delay for obtaining system information.
  • the provided method is applied to an NR communication system or a 5G communication network as an example for description.
  • the methods provided in Embodiment 1 and Embodiment 2 can also be applied to other networks in which the base station has a separate architecture.
  • the access network element is an access network device.
  • the method provided in the third embodiment includes:
  • a terminal sends a first request to an access network device, where the first request is used to request system information corresponding to N cells.
  • the access network device receives the first request from the terminal.
  • the terminal is in the idle state, and the first request is MAC CE signaling or message 1 in the random access process or message 3 in the random access process; or, the terminal is in the connected state, and the first request is RRC signaling Or MAC CE signaling.
  • the first request is MAC CE signaling or message 1 in the random access process or message 3 in the random access process; or, the terminal is in the connected state, and the first request is RRC signaling Or MAC CE signaling.
  • the access network device sends a first response to the terminal according to the first request, where the first response includes system information corresponding to M cells, and the M cells include at least some of the N cells.
  • the terminal receives the first response from the access network device, so as to obtain the system information corresponding to the M cells according to the first response.
  • the access network device may send the first response to the terminal in a broadcast manner or MAC CE signaling.
  • the access network device may send the first response to the terminal by means of broadcast or RRC signaling or MAC CE signaling.
  • a terminal can only request system information corresponding to one cell at a time.
  • the terminal can obtain the corresponding system information of multiple cells at a time.
  • the system information can improve signaling interaction efficiency and reduce air interface signaling overhead.
  • the method further includes: the access network device locally obtains system information corresponding to one or more cells according to the first request.
  • the method further includes:
  • the access network device sends a fifth request to other access network devices according to the first request, where the fifth request is used to request system information corresponding to one or more cells.
  • the fifth request is used to request system information corresponding to one or more cells.
  • other access network devices receive the fifth request from the access network device.
  • the other access network device sends a fifth response to the access network device according to the fifth request, where the fifth response includes system information corresponding to one or more cells.
  • the access network device receives the fifth response from other access network devices.
  • the information contained in the fifth request is similar to the information contained in the aforementioned second request
  • the information contained in the fifth response is similar to the information contained in the aforementioned second response.
  • the format of the information contained in the fifth request and the fifth response please refer to the format of the information contained in the second request and the second response mentioned above, and will not be repeated here.
  • step 1002 the actions performed by the access network device may be different in different situations, and the following descriptions are made separately based on case 5 and case 6.
  • the terminal requests system information corresponding to N cells, and when the access network device feeds back the system information corresponding to the cell to the terminal, it only feeds back the system information corresponding to the cell requested by the terminal.
  • the access network device may send the system information corresponding to some or all of the N cells to the terminal.
  • the system information corresponding to any cell in the access network device may be generated by the access network device, or may be acquired by the access network device from other access network devices and stored in the access network device.
  • the access network device can request system information corresponding to the N2 cells from other access network devices, and The system information corresponding to the requested cell and the system information corresponding to the N1 cells in the access network device are sent to the terminal.
  • the N2 cells are cells other than the N1 cells among the N cells, and the system information corresponding to the requested cell and the system information corresponding to the N1 cells in the access network equipment, that is, the system information corresponding to the M cells .
  • the system information corresponding to the M cells can be sent to the terminal one or more times. For example, the access network device first sends the acquired system information corresponding to the N1 cells to the terminal, and then sends the system information corresponding to the cells requested from other access network devices to the terminal.
  • the access network device can request the system information corresponding to the N cells from other access network devices, and set the system corresponding to the requested cell The information is sent to the terminal.
  • the system information corresponding to the requested cell is the system information corresponding to the M cells.
  • the terminal may continue to request system information corresponding to cells other than M among the N cells from other access network equipment, until the system information corresponding to the N cells is obtained.
  • the terminal requests the system information corresponding to the N cells, and the access network equipment not only feeds back the system information corresponding to the cell requested by the terminal, but also feeds back the system information corresponding to the cell not requested by the terminal.
  • the system information corresponding to the S cells is the system information corresponding to the cell that is not requested by the terminal but sent by the access network device.
  • the access network device may send the system information corresponding to some or all of the N+S cells to the terminal.
  • N+S cells are the sum of N cells and S cells.
  • the access network device can request system information corresponding to X2 cells from other access network devices , And send the system information corresponding to the requested cell and the system information corresponding to the X1 cells in the access network device to the terminal.
  • X2 cells are cells other than X1 cells among the N+S cells
  • the system information corresponding to the requested cell and the system information corresponding to the X1 cells in the access network equipment are corresponding to the M cells.
  • System information, the system information corresponding to the M cells can be sent to the terminal one or more times. For example, the access network device first sends the acquired system information corresponding to X1 cells to the terminal, and then sends the system information corresponding to the cells requested from other access network devices to the terminal.
  • the access network device can request the system information corresponding to the N+S cells from other access network devices, and the requested system information
  • the system information corresponding to the cell is sent to the terminal.
  • the system information corresponding to the requested cell is the system information corresponding to the M cells.
  • the terminal may continue to request system information corresponding to cells other than the received cell among the N cells from other access network equipment.
  • Embodiment 1 and Embodiment 2 exemplify the implementation process of the method provided in the foregoing embodiment based on the architecture shown in FIG. 11.
  • CU1 is connected to 3 DUs, namely DU1, DU2 and DU3.
  • the cells covered by the 3 DUs can be seen in Table 2.
  • Example 1 (DU cannot parse the information contained in the first request)
  • Embodiment 1 Assuming that the terminal needs to obtain system information corresponding to cell 1 to cell 5, referring to FIG. 12, the method provided in Embodiment 1 includes:
  • the terminal obtains the CGI of 5 cells and the type of system information corresponding to each of the 5 cells.
  • 5 cells are cell 1 to cell 5.
  • the terminal generates a cell unique identifier list according to the CGIs of the 5 cells, and generates a system information type identifier list according to the type of system information corresponding to each of the 5 cells.
  • the cell unique identifier list contains the CGI of 5 cells.
  • the system information type identifier list contains the type of system information corresponding to each of the five cells.
  • the terminal sends a first request to DU1 according to the cell unique identification list and the system information type identification list.
  • DU1 receives the first request from the terminal.
  • the first request includes a cell unique identification list and a system information type identification list.
  • the DU cannot parse the information contained in the first request.
  • the first request may be message 3 in the random access process.
  • the first request may be RRC signaling.
  • the terminal may send a first request to any one of DU1, DU2, and DU3.
  • the terminal sending the first request to DU1 is taken as an example for description.
  • DU1 sends a second request to CU1 according to the first request.
  • CU1 receives the second request from DU1.
  • step 1204 since the DU cannot parse the information contained in the first request, DU1 may directly carry the information contained in the first request in the second request and send it to CU1.
  • the second request includes a cell unique identification list and a system information type identification list.
  • CU1 sends a second response to DU1 according to the second request.
  • DU1 receives the second response from CU1.
  • the second response includes a cell unique identification list and a system information list
  • the system information list includes system information corresponding to some or all of the 5 cells.
  • DU1 sends a first response to the terminal according to the second response.
  • the terminal receives the first response from DU1.
  • the first response includes a cell unique identification list and a system information list
  • the system information list includes system information corresponding to some or all of the 5 cells.
  • the terminal determines system information corresponding to some or all of the 5 cells according to the first response.
  • the terminal can determine whether the system information corresponding to all of the 5 cells has been acquired. If yes, then end; if not, the terminal may send to other DUs other than DU1 for requesting system information corresponding to the other (that is, unobtained) cells among the 5 cells. For example, if the terminal obtains the system information corresponding to cell 1 to cell 3 of the 5 cells through the first request, the terminal can send a request for the system information corresponding to cell 4 and cell 5 to DU2, until it obtains Up to the system information corresponding to the 5 cells.
  • Embodiment 2 (DU can parse the information contained in the first request)
  • the method provided in embodiment 2 includes:
  • the terminal obtains the CGIs of 5 cells and the type of system information corresponding to each of the 5 cells.
  • 5 cells are cell 1 to cell 5.
  • the terminal generates a cell unique identification list 1 according to the CGIs of the 5 cells, and generates a system information type identification list 1 according to the type of system information corresponding to each of the 5 cells.
  • the cell unique identifier list 1 contains the CGIs of 5 cells.
  • the system information type identifier list 1 contains the type of system information corresponding to each of the five cells.
  • the terminal sends a first request to DU1 according to the cell unique identification list 1 and the system information type identification list 1.
  • DU1 receives the first request from the terminal.
  • the first request is used to request system information corresponding to cell 1 to cell 5, and the first request includes cell unique identification list 1 and system information type identification list 1.
  • the DU can parse the information contained in the first request.
  • the first request is MAC CE signaling or message 1 in the random access process.
  • the first request is MAC CE signaling.
  • the terminal may send a first request to any one of DU1, DU2, and DU3.
  • the terminal sending the first request to DU1 is taken as an example for description.
  • DU1 locally obtains system information corresponding to cell 1 and cell 2 according to the first request.
  • DU1 sends a sixth request to CU1 according to the first request.
  • CU1 receives the sixth request from DU1.
  • the sixth request is used to request system information corresponding to cell 3 to cell 5.
  • the sixth request includes cell unique identification list 2 and system information type identification list 2.
  • the cell unique identifier list 2 includes the identifiers of the cells 3 to 5, and the system information type identifier list 2 includes the type identifiers of the system information corresponding to the cells 3 to 5.
  • CU1 sends a sixth response to DU1 according to the sixth request.
  • DU1 receives the sixth response from CU1.
  • the sixth response includes cell unique identifier list 3 and system information list 3.
  • the cell unique identifier list 3 includes the identities of some or all of the cells from cell 3 to cell 5.
  • the system information list 3 includes system information corresponding to some or all of the cells from cell 3 to cell 5.
  • DU1 sends a first response to the terminal according to the sixth response and the locally acquired system information corresponding to cell 1 and cell 2.
  • the terminal receives the first response from DU1.
  • the first response includes the cell unique identification list 4 and the system information list 4.
  • the cell unique identifier list 4 includes the identifiers of cell 1 and cell 2, and also includes the identifiers of the cells corresponding to the system information obtained by DU1 from CU1.
  • the system information list 4 includes system information corresponding to cell 1 and cell 2, and also includes system information corresponding to the cell obtained by DU1 from CU1.
  • the terminal determines system information corresponding to some or all of the 5 cells according to the first response.
  • the terminal can determine whether the system information corresponding to all of the 5 cells has been acquired. If yes, then end; if not, the terminal may send to other DUs other than DU1 for requesting system information corresponding to the other (that is, unobtained) cells among the 5 cells. For example, if the terminal obtains the system information corresponding to cell 1 to cell 3 of the 5 cells through the first request, the terminal can send a request for the system information corresponding to cell 4 and cell 5 to DU2, until it obtains Up to the system information corresponding to the 5 cells.
  • Embodiment 3 and Embodiment 4 exemplify the implementation process of the method provided in the foregoing embodiment based on the architecture shown in FIG. 14.
  • CU1 is connected to DU1 and DU2
  • CU2 is connected to DU3 and DU4.
  • the cells covered by the 4 DUs can be seen in Table 3.
  • DU1 DU2 DU3 DU4 Cell 1 cell 2 Community 3 Cell 4, cell 5 District 6, District 7
  • Embodiment 3 (DU cannot parse the information contained in the first request)
  • the method provided in Embodiment 3 includes the following steps 1501 to 1508.
  • CU1 obtains the CGI of the cell under CU2 and the system information corresponding to each cell through the Xn interface.
  • CU1 may store the acquired CGI of the cells under CU2 and the system information corresponding to each cell locally.
  • CU2 can also obtain the CGI of the cell under CU1 and the system information corresponding to each cell through the Xn interface, and store it locally.
  • step 1502 to step 1508 are the same as step 1201 to step 1207, respectively.
  • the terminal may send the first request to any one of DU1, DU2, DU3, and DU4.
  • the terminal sending the first request to DU1 is taken as an example for description.
  • Embodiment 4 (DU can parse the information contained in the first request)
  • the method provided in Embodiment 4 includes step 1601 to step 1609. Among them, step 1601 is the same as step 1501, and step 1602 to step 1609 are the same as step 1301 to step 1308, respectively.
  • the terminal may send the first request to any one of DU1, DU2, DU3, and DU4.
  • the terminal sending the first request to DU1 is taken as an example for description.
  • system information corresponding to the cell of the other party may not be obtained in advance between CU1 and CU2, but the system information corresponding to the cell may be obtained through interaction when requested by the terminal.
  • the application embodiment does not specifically limit this.
  • each network element for example, DU, CU, access network device, and terminal, in order to implement the above-mentioned functions, includes hardware structures and/or software modules corresponding to each function.
  • the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software-driven hardware depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.
  • the embodiments of the present application can divide functional units of DU, CU, access network equipment, and terminal according to the foregoing method examples.
  • each functional unit can be divided corresponding to each function, or two or more functions can be integrated in One processing unit.
  • the above-mentioned integrated unit can be implemented in the form of hardware or software functional unit. It should be noted that the division of units in the embodiments of the present application is illustrative, and is only a logical function division, and there may be other division methods in actual implementation.
  • FIG. 17 shows a possible structural diagram of the apparatus for obtaining system information (denoted as the apparatus for obtaining system information 170) involved in the above-mentioned embodiment.
  • the apparatus for obtaining system information is 170 includes a processing unit 1701 and a communication unit 1702, and may also include a storage unit 1703.
  • the schematic structural diagram shown in FIG. 17 may be used to illustrate the structure of the terminal, DU, CU, or access network device involved in the foregoing embodiment.
  • the processing unit 1701 is used to control and manage the actions of the terminal.
  • the processing unit 1701 is used to support the terminal to execute 201 to 202 in Figure 2, 801 to 802 in Figure 8, 901 to 902 in Figure 9, 1001 to 1002 in Figure 10, 1201 to 1202 in Figure 12 1203, 1206, and 1207, 1301, 1302, 1303, 1307, and 1308 in Figure 13, 1502, 1503, 1504, 1507, and 1508 in Figure 15, 1602, 1603, 1604, 1608, and 1609 in Figure 16, and/ Or actions performed by the terminal in other processes described in the embodiments of this application.
  • the processing unit 1701 may communicate with other network entities through the communication unit 1702, for example, communication with the network element of the access network shown in FIG. 2.
  • the storage unit 1703 is used to store program codes and data of the terminal.
  • the apparatus 170 for acquiring system information may be a terminal or a chip in the terminal.
  • the processing unit 1701 is used to control and manage the actions of the DU.
  • the processing unit 1701 is used to support the DU to execute 201 to 202 in FIG. 2 (the access network element in FIG. 2 is DU at this time), and 801 to 804 in FIG. 8 (the DU is the first in FIG. 8 at this time).
  • 1 DU) 901 to 902 in Fig. 9, 1203 to 1206 in Fig. 12 (DU is DU1 in Fig. 12 at this time), 1303 to 1307 in Fig. 13 (DU is DU1 in Fig. 13 at this time), 1504 to 1507 in Fig.
  • the processing unit 1701 may communicate with other network entities through the communication unit 1702, for example, communication with the terminal shown in FIG. 8.
  • the storage unit 1703 is used to store the DU program code and data.
  • the apparatus 170 for acquiring system information may be a DU or a chip in the DU.
  • the processing unit 1701 is used to control and manage the actions of the CU.
  • the processing unit 1701 is used to support the CU to execute 802 to 803 in Fig. 8 (the CU is the first CU in Fig. 8 at this time), and 1204 to 1205 in Fig. 12 (the CU is the CU1 in Fig. 12 at this time), 1305 to 1306 in Fig. 13 (CU is CU1 in Fig. 13 at this time), 1501 in Fig. 15 (CU is CU1 or CU2 in Fig. 15 at this time), 1505 and 1506 in Fig.
  • the processing unit 1701 may communicate with other network entities through the communication unit 1702, for example, communication with the first DU shown in FIG. 8.
  • the storage unit 1703 is used to store the program code and data of the CU.
  • the apparatus 170 for acquiring system information may be the CU or a chip in the CU.
  • the processing unit 1701 is used to control and manage the actions of the access network device.
  • the processing unit 1701 is configured to support the access network device to execute 201 to 202 in FIG. 2 (at this time, the access network network element in FIG. 2 is the access network device), 1001 to 1002 in FIG. 10, and/or Actions performed by the access network device in other processes described in the embodiments of this application.
  • the processing unit 1701 may communicate with other network entities through the communication unit 1702, for example, communication with the terminal shown in FIG. 10.
  • the storage unit 1703 is used to store program codes and data of the access network device.
  • the apparatus 170 for acquiring system information may be the access network device or a chip in the access network device.
  • the processing unit 1701 may be a processor or a controller
  • the communication unit 1702 may be a communication interface, a transceiver, a transceiver, a transceiver circuit, Transceiver etc.
  • the communication interface is a general term and may include one or more interfaces.
  • the storage unit 1703 may be a memory.
  • the processing unit 1701 may be a processor or a controller, and the communication unit 1702 may be an input interface and/or output interface, pin or Circuit etc.
  • the storage unit 1703 may be a storage unit (for example, register, cache, etc.) in the chip, or a storage unit (for example, read-only memory, random access memory, etc.) located outside the chip in a terminal, DU, CU or access network device. Access memory, etc.).
  • the communication unit may also be referred to as a transceiver unit.
  • the antenna and control circuit with transceiving function in the device 170 for acquiring system information can be regarded as the communication unit 1702 of the device 170 for acquiring system information
  • the processor with processing function can be regarded as the processing unit 1701 of the device 170 for acquiring system information.
  • the device for implementing the receiving function in the communication unit 1702 may be regarded as a receiving unit, which is used to perform the receiving steps in the embodiment of the present application, and the receiving unit may be a receiver, a receiver, a receiving circuit, and the like.
  • the device for implementing the sending function in the communication unit 1702 can be regarded as a sending unit, the sending unit is used to perform the sending steps in the embodiment of the present application, and the sending unit can be a transmitter, a transmitter, a sending circuit, and the like.
  • the integrated unit in FIG. 17 is implemented in the form of a software function module and sold or used as an independent product, it can be stored in a computer readable storage medium.
  • the medium includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to execute all or part of the steps of the methods described in the various embodiments of the present application.
  • Storage media for storing computer software products include: U disk, mobile hard disk, read-only memory (read-only memory, ROM for short), random access memory (RAM for short), magnetic disk or optical disk, etc.
  • the medium of the program code include: U disk, mobile hard disk, read-only memory (read-only memory, ROM for short), random access memory (RAM for short), magnetic disk or optical disk, etc.
  • the unit in FIG. 17 may also be called a module, for example, the processing unit may be called a processing module.
  • the embodiment of the present application also provides a schematic diagram of the hardware structure of a device for acquiring system information (denoted as the device for acquiring system information 180). See FIG. 18 or FIG. 19.
  • the device for acquiring system information 180 includes a processor 1801, which is optional Yes, it also includes a memory 1802 connected to the processor 1801.
  • the processor 1801 can be a general-purpose central processing unit (central processing unit, CPU for short), microprocessor, application-specific integrated circuit (ASIC for short), or one or more programs used to control the program of this application Implementation of integrated circuits.
  • the processor 1801 may also include multiple CPUs, and the processor 1801 may be a single-CPU (single-CPU) processor or a multi-core (multi-CPU) processor.
  • the processor here may refer to one or more devices, circuits, or processing cores for processing data (for example, computer program instructions).
  • the memory 1802 may be ROM or other types of static storage devices that can store static information and instructions, RAM, or other types of dynamic storage devices that can store information and instructions, or an electrically erasable programmable read-only memory (electrically erasable programmable read-only memory).
  • read-only memory EEPROM for short
  • compact disc read-only memory CD-ROM for short
  • optical disc storage optical disc storage (including compact discs, laser discs, optical discs, digital universal discs, Blu-ray discs, etc.)
  • a disk storage medium or other magnetic storage device or any other medium that can be used to carry or store desired program codes in the form of instructions or data structures and that can be accessed by a computer.
  • the embodiments of the present application do not impose any limitation on this.
  • the memory 1802 may exist independently, or may be integrated with the processor 1801. Wherein, the memory 1802 may contain computer program code.
  • the processor 1801 is configured to execute the computer program code stored in the memory 1802, so as to implement the method provided in the embodiment
  • the apparatus 180 for acquiring system information further includes a transceiver 1803.
  • the processor 1801, the memory 1802, and the transceiver 1803 are connected by a bus.
  • the transceiver 1803 is used to communicate with other devices or communication networks.
  • the transceiver 1803 may include a transmitter and a receiver.
  • the device used for implementing the receiving function in the transceiver 1803 can be regarded as a receiver, and the receiver is used to perform the receiving steps in the embodiment of the present application.
  • the device in the transceiver 1803 for implementing the sending function can be regarded as a transmitter, and the transmitter is used to perform the sending steps in the embodiment of the present application.
  • the schematic structural diagram shown in FIG. 18 may be used to illustrate the structure of the DU, CU, access network device, or terminal involved in the foregoing embodiment.
  • the processor 1801 is used to control and manage the actions of the terminal.
  • the processor 1801 is used to support the terminal to execute 201 to 202 in FIG. 2, 801 to 802 in FIG. 8, 901 to 902 in FIG. 9, 1001 to 1002 in FIG. 10, and 1201 to 1202 in FIG. 1203, 1206, and 1207, 1301, 1302, 1303, 1307, and 1308 in Figure 13, 1502, 1503, 1504, 1507, and 1508 in Figure 15, 1602, 1603, 1604, 1608, and 1609 in Figure 16, and/ Or actions performed by the terminal in other processes described in the embodiments of this application.
  • the processor 1801 may communicate with other network entities through the transceiver 1803, for example, communication with the network element of the access network shown in FIG. 2.
  • the memory 1802 is used to store program codes and data of the terminal.
  • the processor 1801 is used to control and manage the actions of the DU.
  • the processor 1801 is configured to support the DU to execute 201 to 202 in FIG. 2 (the access network element in FIG. 2 is DU at this time), and 801 to 804 in FIG. 8 (the DU is the first in FIG. 8 at this time).
  • 1 DU) 901 to 902 in Fig. 9, 1203 to 1206 in Fig. 12 (DU is DU1 in Fig. 12 at this time), 1303 to 1307 in Fig. 13 (DU is DU1 in Fig. 13 at this time), 1504 to 1507 in Fig.
  • the processor 1801 may communicate with other network entities through the transceiver 1803, for example, with the terminal shown in FIG. 8.
  • the memory 1802 is used to store DU program codes and data.
  • the processor 1801 is used to control and manage the actions of the CU.
  • the processor 1801 is used to support the CU to execute 802 to 803 in Fig. 8 (the CU is the first CU in Fig. 8 at this time), and 1204 to 1205 in Fig. 12 (the CU is the CU1 in Fig. 12 at this time), 1305 to 1306 in Fig. 13 (CU is CU1 in Fig. 13 at this time), 1501 in Fig. 15 (CU is CU1 or CU2 in Fig. 15 at this time), 1505 and 1506 in Fig.
  • the processor 1801 may communicate with other network entities through the transceiver 1803, for example, communication with the first DU shown in FIG. 8.
  • the memory 1802 is used to store the program code and data of the CU.
  • the processor 1801 is used to control and manage the actions of the access network device.
  • the processor 1801 is configured to support an access network device to execute 201 to 202 in FIG. 2 (at this time, the access network element in FIG. 2 is an access network device), 1001 to 1002 in FIG. 10, and/or Actions performed by the access network device in other processes described in the embodiments of this application.
  • the processor 1801 may communicate with other network entities through the transceiver 1803, for example, communication with the terminal shown in FIG. 10.
  • the memory 1802 is used to store program codes and data of the access network device.
  • the processor 1801 includes a logic circuit and an input interface and/or an output interface. Among them, the output interface is used to execute the sending action in the corresponding method, and the input interface is used to execute the receiving action in the corresponding method.
  • FIG. 19 The schematic structural diagram shown in FIG. 19 may be used to illustrate the structure of the DU, CU, access network device or terminal involved in the foregoing embodiment.
  • the processor 1801 is used to control and manage the actions of the terminal.
  • the processor 1801 is used to support the terminal to execute 201 to 202 in FIG. 2, 801 to 802 in FIG. 8, 901 to 902 in FIG. 9, 1001 to 1002 in FIG. 10, and 1201 to 1202 in FIG. 1203, 1206, and 1207, 1301, 1302, 1303, 1307, and 1308 in Figure 13, 1502, 1503, 1504, 1507, and 1508 in Figure 15, 1602, 1603, 1604, 1608, and 1609 in Figure 16, and/ Or actions performed by the terminal in other processes described in the embodiments of this application.
  • the processor 1801 may communicate with other network entities through an input interface and/or an output interface, for example, communication with the network element of the access network shown in FIG. 2.
  • the memory 1802 is used to store program codes and data of the terminal.
  • the processor 1801 is used to control and manage the actions of the DU.
  • the processor 1801 is configured to support the DU to execute 201 to 202 in FIG. 2 (the access network element in FIG. 2 is DU at this time), and 801 to 804 in FIG. 8 (the DU is the first in FIG. 8 at this time).
  • 1 DU) 901 to 902 in Fig. 9, 1203 to 1206 in Fig. 12 (DU is DU1 in Fig. 12 at this time), 1303 to 1307 in Fig. 13 (DU is DU1 in Fig. 13 at this time), 1504 to 1507 in Fig.
  • the processor 1801 may communicate with other network entities through an input interface and/or an output interface, for example, communication with the terminal shown in FIG. 8.
  • the memory 1802 is used to store DU program codes and data.
  • the processor 1801 is used to control and manage the actions of the CU.
  • the processor 1801 is used to support the CU to execute 802 to 803 in Fig. 8 (the CU is the first CU in Fig. 8 at this time), and 1204 to 1205 in Fig. 12 (the CU is the CU1 in Fig. 12 at this time), 1305 to 1306 in Fig. 13 (CU is CU1 in Fig. 13 at this time), 1501 in Fig. 15 (CU is CU1 or CU2 in Fig. 15 at this time), 1505 and 1506 in Fig.
  • the processor 1801 may communicate with other network entities through an input interface and/or an output interface, for example, communication with the first DU shown in FIG. 8.
  • the memory 1802 is used to store the program code and data of the CU.
  • the processor 1801 is used to control and manage the actions of the access network device.
  • the processor 1801 is configured to support an access network device to execute 201 to 202 in FIG. 2 (at this time, the access network element in FIG. 2 is an access network device), 1001 to 1002 in FIG. 10, and/or Actions performed by the access network device in other processes described in the embodiments of this application.
  • the processor 1801 may communicate with other network entities through an input interface and/or an output interface, for example, communication with the terminal shown in FIG. 10.
  • the memory 1802 is used to store program codes and data of the access network device.
  • the embodiment of the present application also provides a schematic diagram of the hardware structure of a terminal (denoted as terminal 200). For details, refer to FIG. 20.
  • FIG. 20 is a schematic diagram of the hardware structure of the terminal 200. For ease of description, FIG. 20 only shows the main components of the terminal. As shown in FIG. 20, the terminal 200 includes a processor, a memory, a control circuit, an antenna, and an input and output device.
  • the processor is mainly used to process the communication protocol and communication data, and to control the entire terminal, execute the software program, and process the data of the software program. For example, it is used to control the terminal to execute 201 to 202 in FIG. 2 and the data in FIG. 8 801 to 802, 901 to 902 in Figure 9, 1001 to 1002 in Figure 10, 1201, 1202, 1203, 1206 and 1207 in Figure 12, 1301, 1302, 1303, 1307 and 1308 in Figure 13, Figure 15 1502, 1503, 1504, 1507, and 1508 in Figure 16, 1602, 1603, 1604, 1608, and 1609 in Figure 16, and/or actions performed by the terminal in other processes described in the embodiments of this application.
  • the memory is mainly used to store software programs and data.
  • the control circuit (also called a radio frequency circuit) is mainly used for conversion of baseband signals and radio frequency signals and processing of radio frequency signals.
  • the control circuit and the antenna together can also be called a transceiver, which is mainly used to send and receive radio frequency signals in the form of electromagnetic waves.
  • Input and output devices such as touch screens, display screens, and keyboards, are mainly used to receive data input by users and output data to users.
  • the processor can read the software program in the memory, interpret and execute the instructions of the software program, and process the data of the software program.
  • the processor performs baseband processing on the data to be sent, and then outputs the baseband signal to the control circuit in the control circuit.
  • the control circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal through the antenna in the form of electromagnetic waves. send.
  • the control circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, and the processor converts the baseband signal into data and processes the data.
  • FIG. 20 only shows a memory and a processor. In an actual terminal, there may be multiple processors and memories.
  • the memory may also be referred to as a storage medium or a storage device, etc., which is not limited in the embodiment of the present application.
  • the processor may include a baseband processor and a central processing unit.
  • the baseband processor is mainly used to process communication protocols and communication data.
  • the central processing unit is mainly used to control the entire terminal and execute software. Program, processing data of software program.
  • the processor in FIG. 20 integrates the functions of the baseband processor and the central processing unit.
  • the baseband processor and the central processing unit may also be independent processors and are interconnected by technologies such as buses.
  • the terminal may include multiple baseband processors to adapt to different network standards, the terminal may include multiple central processors to enhance its processing capabilities, and various components of the terminal may be connected through various buses.
  • the baseband processor can also be expressed as a baseband processing circuit or a baseband processing chip.
  • the central processing unit can also be expressed as a central processing circuit or a central processing chip.
  • the function of processing the communication protocol and communication data can be built in the processor, or can be stored in the memory in the form of a software program, and the processor executes the software program to realize the baseband processing function.
  • the embodiment of the present application also provides a computer-readable storage medium, including instructions, which when run on a computer, cause the computer to execute any of the foregoing methods.
  • the embodiments of the present application also provide a computer program product containing instructions, which when run on a computer, cause the computer to execute any of the above-mentioned methods.
  • An embodiment of the present application also provides a communication system, including: the above-mentioned network device and terminal.
  • the above embodiments it may be implemented in whole or in part by software, hardware, firmware or any combination thereof.
  • a software program it can be implemented in the form of a computer program product in whole or in part.
  • the computer program product includes one or more computer instructions.
  • the computer program instructions When the computer program instructions are loaded and executed on the computer, the processes or functions described in the embodiments of the present application are generated in whole or in part.
  • the computer can be a general-purpose computer, a dedicated computer, a computer network, or other programmable devices.
  • Computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium.
  • computer instructions can be transmitted from a website, computer, server, or data center through a cable (such as Coaxial cable, optical fiber, digital subscriber line (digital subscriber line, referred to as DSL) or wireless (such as infrared, wireless, microwave, etc.) transmission to another website site, computer, server or data center.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or may include one or more data storage devices such as a server or data center that can be integrated with the medium.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, and a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (SSD)).

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Abstract

本申请提供了一种获取系统信息的方法及装置，涉及通信技术领域。在该方法中，终端可以向接入网网元发送用于请求多个小区对应的系统信息的第一请求，接入网网元根据该第一请求向终端发送包括一个或多个小区对应的系统信息的第一响应。现有技术中，终端一次只能请求一个小区对应的系统信息，与现有的获取小区对应的系统信息的方式相比，本申请提供的方法中，终端可以一次性获取多个小区对应的系统信息，从而可以降低空口信令开销。

Description

获取系统信息的方法及装置
本申请要求于2019年01月31日提交国家知识产权局、申请号为201910101509.8、申请名称为“获取系统信息的方法及装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，尤其涉及一种获取系统信息的方法及装置。
背景技术
为了能正常接入小区，终端在完成扫频和小区下行同步之后，还需要继续读取小区对应的一种或多种类型的系统信息。其中，主信息块(MasterInformationBlock，简称MIB)和系统信息块类型1(SystemInformationBlockType1，简称SIB1)这两种类型的系统信息一般是由基站周期性广播，其他类型的系统信息块(SystemInformationBlock，简称SIB)可有选择性地被周期性广播。在新空口(new radio，简称NR)系统中，当终端发现某些系统信息未被广播，但终端又需要这些系统信息时，终端可主动向基站发出请求以获取相应的系统信息。
在NR系统中，基站可以是分离式架构，即基站包括集中式单元(central unit，简称CU)和分布式单元(distributed unit，简称DU)两部分，一个CU可以连接多个DU。对于分离式的基站架构，终端如果需要获取多个DU下的小区对应的系统信息，就需要向多个DU分别发送随机接入过程中的消息1(message1，简称MSG1)或者无线资源控制(radio resource control，简称RRC)系统信息请求(RRCSystemInfoRequest)，RRCSystemInfoRequest是一种可通过随机接入过程中的消息3(message3，简称MSG3)发送的信息，并且，终端一次仅能请求一个小区对应的系统信息。随后每个DU通过F1接口向CU上报终端的系统信息请求，CU再通过F1接口将终端请求的系统信息发送给DU，DU再转发给终端。以上过程中，终端和DU间的空口信令开销以及F1接口信令开销都较大。
发明内容
本申请实施例提供了一种获取系统信息的方法及装置，用于降低信令开销。
为达到上述目的，本申请实施例提供如下技术方案：
第一方面，提供了一种获取系统信息的方法，包括：终端向接入网网元发送用于请求N个小区对应的系统信息的第一请求，并从接入网网元接收包括M个小区对应的系统信息的第一响应。其中，M个小区至少包括N个小区中的部分小区，N为大于1的整数，M为大于0的整数。现有技术中，终端一次只能请求一个小区对应的系统信息，与现有的获取小区对应的系统信息的方式相比，第一方面提供的方法中，终端可以一次性获取多个小区对应的系统信息，从而可以降低空口信令开销。
在一种可能的实现方式中，第一请求包括用于指示N个小区的信息和用于指示N个小区中每个小区对应的系统信息的类型的信息；或者，第一请求包括用于指示N个小区的信息。该种可能的实现方式，可以使得接入网网元确定终端请求的每个小区对应的系统信息。
在一种可能的实现方式中，第一响应包括用于指示M个小区的信息和M个小区中每个小区对应的系统信息；或者，第一响应包括用于指示M个小区的信息、用于指示M个 小区中每个小区对应的系统信息的类型的信息和M个小区中每个小区对应的系统信息。该种可能的实现方式，可以使得终端确定请求的每个小区对应的系统信息。
在一种可能的实现方式中，接入网网元为接入网设备，或者，接入网网元为DU。
在一种可能的实现方式中，终端处于空闲态，第一请求为MAC CE信令或随机接入过程中的消息1或随机接入过程中的消息3；或者，终端处于连接态，第一请求为RRC信令或MAC CE信令。
第二方面，提供了一种获取系统信息的方法，包括：DU从终端接收用于请求N个小区对应的系统信息的第一请求，并根据第一请求向第一CU发送用于为终端请求N个小区对应的系统信息的第二请求；DU从第一CU接收包括M个小区对应的系统信息的第二响应，M个小区至少包括N个小区中的部分小区，M为大于0的整数，N为大于1的整数；DU向终端发送第一响应，第一响应包括M个小区对应的系统信息。
现有技术中，终端一次只能请求一个小区对应的系统信息，与现有的获取小区对应的系统信息的方式相比，第二方面提供的方法中，终端可以一次性获取多个小区对应的系统信息，从而可以降低空口信令开销。
在一种可能的实现方式中，第一请求和第二请求包括：用于指示N个小区的信息和用于指示N个小区中每个小区对应的系统信息的类型的信息；或者，第一请求和第二请求包括：用于指示N个小区的信息。该种可能的实现方式，可以使得第一CU确定终端请求的每个小区对应的系统信息。
在一种可能的实现方式中，第一响应包括：用于指示M个小区的信息和M个小区中每个小区对应的系统信息；或者，用于指示M个小区的信息、用于指示M个小区中每个小区对应的系统信息的类型的信息和M个小区中每个小区对应的系统信息；第二响应包括：用于指示M个小区的信息和M个小区中每个小区对应的系统信息；或者，第二响应包括用于指示M个小区的信息和用于指示M个小区中每个小区对应的系统信息的类型的信息；或者，第二响应包括用于指示M个小区的信息、用于指示M个小区中每个小区对应的系统信息的类型的信息和M个小区中每个小区对应的系统信息。该种可能的实现方式，可以使得终端确定请求的每个小区对应的系统信息。
在一种可能的实现方式中，终端处于空闲态，第一请求为随机接入过程中的消息3；或者，终端处于连接态，第一请求为RRC信令。
第三方面，提供了一种获取系统信息的方法，包括：DU从终端接收第一请求，所述第一请求用于请求N个小区对应的系统信息，N为大于1的整数；所述DU根据所述第一请求向所述终端发送第一响应，所述第一响应包括M个小区对应的系统信息，所述M个小区至少包括所述N个小区中的部分小区，M为大于0的整数。
现有技术中，终端一次只能请求一个小区对应的系统信息，与现有的获取小区对应的系统信息的方式相比，第三方面提供的方法中，终端可以一次性获取多个小区对应的系统信息，从而可以降低空口信令开销。
在一种可能的实现方式中，所述第一请求包括用于指示所述N个小区的信息和用于指示所述N个小区中每个小区对应的系统信息的类型的信息；或者，所述第一请求包括用于指示所述N个小区的信息。该种可能的实现方式，可以使得DU确定终端请求的每个小区对应的系统信息。
在一种可能的实现方式中，所述第一响应包括用于指示所述M个小区的信息和所述M个小区中每个小区对应的系统信息；或者，所述第一响应包括用于指示所述M个小区的信息、用于指示所述M个小区中每个小区对应的系统信息的类型的信息和所述M个小区中每个小区对应的系统信息。该种可能的实现方式，可以使得终端确定请求的每个小区对应的系统信息。
在一种可能的实现方式中，在所述DU根据所述第一请求向所述终端发送第一响应之前，所述方法还包括：所述DU根据所述第一请求本地获取一个或多个小区对应的系统信息。
在一种可能的实现方式中，在所述DU根据所述第一请求向所述终端发送第一响应之前，所述方法还包括：所述DU与第一CU交互获取一个或多个小区对应的系统信息。
在一种可能的实现方式中，所述终端处于空闲态，所述第一请求为MAC CE信令或随机接入过程中的消息1；或者，所述终端处于连接态，所述第一请求为MAC CE信令。
第四方面，提供了一种获取系统信息的方法，包括：第一CU从DU接收用于为终端请求N个小区对应的系统信息的第二请求，并根据第二请求向DU发送包括M个小区对应的系统信息的第二响应，M个小区至少包括N个小区中的部分小区，M为大于0的整数，N为大于1的整数。
现有技术中，终端一次只能请求一个小区对应的系统信息，与现有的获取小区对应的系统信息的方式相比，第四方面提供的方法中，终端可以一次性获取多个小区对应的系统信息，从而可以降低空口信令开销。
在一种可能的实现方式中，第二请求包括用于指示N个小区的信息和用于指示N个小区中每个小区对应的系统信息的类型的信息；或者，第二请求包括用于指示N个小区的信息。该种可能的实现方式，可以使得第一CU确定终端请求的每个小区对应的系统信息。
在一种可能的实现方式中，第二响应包括用于指示M个小区的信息和M个小区中每个小区对应的系统信息；或者，第二响应包括用于指示M个小区的信息和用于指示M个小区中每个小区对应的系统信息的类型的信息；或者，第二响应包括用于指示M个小区的信息、用于指示M个小区中每个小区对应的系统信息的类型的信息和M个小区中每个小区对应的系统信息。该种可能的实现方式，可以使得DU确定终端请求的每个小区对应的系统信息。
在一种可能的实现方式中，在第一CU根据第二请求向DU发送第二响应之前，方法还包括：第一CU根据第二请求本地获取一个或多个小区对应的系统信息。
在一种可能的实现方式中，在第一CU根据第二请求向DU发送第二响应之前，方法还包括：第一CU根据第二请求向一个或多个DU发送第三请求，第三请求用于请求一个或多个小区对应的系统信息；第一CU从一个或多个DU接收第三响应，第三响应包括一个或多个小区对应的系统信息。
在一种可能的实现方式中，在第一CU根据第二请求向DU发送第二响应之前，方法还包括：第一CU根据第二请求向第二CU发送第四请求，第四请求用于请求一个或多个小区对应的系统信息；第一CU从第二CU接收第四响应，第四响应包括一个或多个小区对应的系统信息。
第五方面，提供了一种获取系统信息的方法，包括：接入网设备从终端接收第一请求， 所述第一请求用于请求N个小区对应的系统信息，N为大于1的整数；所述接入网设备根据所述第一请求向所述终端发送第一响应，所述第一响应包括M个小区对应的系统信息，所述M个小区至少包括所述N个小区中的部分小区，M为大于0的整数。
现有技术中，终端一次只能请求一个小区对应的系统信息，与现有的获取小区对应的系统信息的方式相比，第五方面提供的方法中，终端可以一次性获取多个小区对应的系统信息，从而可以降低空口信令开销。
在一种可能的实现方式中，所述第一请求包括用于指示所述N个小区的信息和用于指示所述N个小区中每个小区对应的系统信息的类型的信息；或者，所述第一请求包括用于指示所述N个小区的信息。该种可能的实现方式，可以使得接入网设备确定终端请求的每个小区对应的系统信息。
在一种可能的实现方式中，所述第一响应包括用于指示所述M个小区的信息和所述M个小区中每个小区对应的系统信息；或者，所述第一响应包括用于指示所述M个小区的信息、用于指示所述M个小区中每个小区对应的系统信息的类型的信息和所述M个小区中每个小区对应的系统信息。该种可能的实现方式，可以使得终端确定请求的每个小区对应的系统信息。
在一种可能的实现方式中，在所述接入网设备根据所述第一请求向所述终端发送第一响应之前，所述方法还包括：所述接入网设备根据所述第一请求本地获取一个或多个小区对应的系统信息。
在一种可能的实现方式中，在所述接入网设备根据所述第一请求向所述终端发送第一响应之前，所述方法还包括：所述接入网设备根据所述第一请求向其他接入网设备发送第五请求，所述第五请求用于请求一个或多个小区对应的系统信息；所述接入网设备从所述其他接入网设备接收第五响应，所述第五响应包括一个或多个小区对应的系统信息。
在一种可能的实现方式中，所述终端处于空闲态，所述第一请求为MAC CE信令或随机接入过程中的消息1或随机接入过程中的消息3；或者，所述终端处于连接态，所述第一请求为RRC信令或MAC CE信令。
第六方面，提供了一种获取系统信息的装置，包括：通信单元和处理单元；处理单元，用于通过通信单元向接入网网元发送用于请求N个小区对应的系统信息的第一请求，N为大于1的整数；处理单元，还用于通过通信单元从接入网网元接收包括M个小区对应的系统信息的第一响应，M个小区至少包括N个小区中的部分小区，M为大于0的整数。
在一种可能的实现方式中，第一请求包括用于指示N个小区的信息和用于指示N个小区中每个小区对应的系统信息的类型的信息；或者，第一请求包括用于指示N个小区的信息。
在一种可能的实现方式中，第一响应包括用于指示M个小区的信息和M个小区中每个小区对应的系统信息；或者，第一响应包括用于指示M个小区的信息、用于指示M个小区中每个小区对应的系统信息的类型的信息和M个小区中每个小区对应的系统信息。
在一种可能的实现方式中，接入网网元为接入网设备，或者，接入网网元为DU。
在一种可能的实现方式中，获取系统信息的装置处于空闲态，第一请求为MAC CE信令或随机接入过程中的消息1或随机接入过程中的消息3；或者，获取系统信息的装置处于连接态，第一请求为RRC信令或MAC CE信令。
第七方面，提供了一种获取系统信息的装置，包括：通信单元和处理单元；所述处理单元，用于通过所述通信单元从终端接收用于请求N个小区对应的系统信息的第一请求，N为大于1的整数；所述处理单元，还用于根据所述第一请求，通过所述通信单元向第一CU发送用于为所述终端请求所述N个小区对应的系统信息的第二请求；所述处理单元，还用于通过所述通信单元从所述第一CU接收包括M个小区对应的系统信息的第二响应，所述M个小区至少包括所述N个小区中的部分小区，M为大于0的整数；所述处理单元，还用于通过所述通信单元向所述终端发送包括所述M个小区对应的系统信息的第一响应。
在一种可能的实现方式中，所述第一请求和所述第二请求包括：用于指示所述N个小区的信息和用于指示所述N个小区中每个小区对应的系统信息的类型的信息；或者，所述第一请求和所述第二请求包括：用于指示所述N个小区的信息。
在一种可能的实现方式中，所述第一响应包括：用于指示所述M个小区的信息和所述M个小区中每个小区对应的系统信息；或者，用于指示所述M个小区的信息、用于指示所述M个小区中每个小区对应的系统信息的类型的信息和所述M个小区中每个小区对应的系统信息；所述第二响应包括：用于指示所述M个小区的信息和所述M个小区中每个小区对应的系统信息；或者，所述第二响应包括用于指示所述M个小区的信息和用于指示所述M个小区中每个小区对应的系统信息的类型的信息；或者，所述第二响应包括用于指示所述M个小区的信息、用于指示所述M个小区中每个小区对应的系统信息的类型的信息和所述M个小区中每个小区对应的系统信息。
在一种可能的实现方式中，所述终端处于空闲态，所述第一请求为随机接入过程中的消息3；或者，所述终端处于连接态，所述第一请求为RRC信令。
第八方面，提供了一种获取系统信息的装置，包括：通信单元和处理单元；所述处理单元，用于通过所述通信单元从终端接收第一请求，所述第一请求用于请求N个小区对应的系统信息，N为大于1的整数；所述处理单元，还用于根据所述第一请求，通过所述通信单元向所述终端发送第一响应，所述第一响应包括M个小区对应的系统信息，所述M个小区至少包括所述N个小区中的部分小区，M为大于0的整数。
在一种可能的实现方式中，所述第一请求包括用于指示所述N个小区的信息和用于指示所述N个小区中每个小区对应的系统信息的类型的信息；或者，所述第一请求包括用于指示所述N个小区的信息。
在一种可能的实现方式中，所述第一响应包括用于指示所述M个小区的信息和所述M个小区中每个小区对应的系统信息；或者，所述第一响应包括用于指示所述M个小区的信息、用于指示所述M个小区中每个小区对应的系统信息的类型的信息和所述M个小区中每个小区对应的系统信息。
在一种可能的实现方式中，所述处理单元，还用于根据所述第一请求本地获取一个或多个小区对应的系统信息。
在一种可能的实现方式中，所述处理单元，还用于通过所述通信单元与第一CU交互获取一个或多个小区对应的系统信息。
在一种可能的实现方式中，所述终端处于空闲态，所述第一请求为MAC CE信令或随机接入过程中的消息1；或者，所述终端处于连接态，所述第一请求为MAC CE信令。
第九方面，提供了一种获取系统信息的装置，包括：通信单元和处理单元；所述处理 单元，用于通过所述通信单元从DU接收第二请求，所述第二请求用于为终端请求N个小区对应的系统信息，N为大于1的整数；所述处理单元，还用于根据所述第二请求，通过所述通信单元向所述DU发送第二响应，所述第二响应包括M个小区对应的系统信息，所述M个小区至少包括所述N个小区中的部分小区，M为大于0的整数。
在一种可能的实现方式中，所述第二请求包括用于指示所述N个小区的信息和用于指示所述N个小区中每个小区对应的系统信息的类型的信息；或者，所述第二请求包括用于指示所述N个小区的信息。
在一种可能的实现方式中，所述第二响应包括用于指示所述M个小区的信息和所述M个小区中每个小区对应的系统信息；或者，所述第二响应包括用于指示所述M个小区的信息和用于指示所述M个小区中每个小区对应的系统信息的类型的信息；或者，所述第二响应包括用于指示所述M个小区的信息、用于指示所述M个小区中每个小区对应的系统信息的类型的信息和所述M个小区中每个小区对应的系统信息。
在一种可能的实现方式中，所述处理单元，还用于根据所述第二请求本地获取一个或多个小区对应的系统信息。
在一种可能的实现方式中，所述处理单元，还用于根据所述第二请求，通过所述通信单元向一个或多个DU发送第三请求，所述第三请求用于请求一个或多个小区对应的系统信息；所述处理单元，还用于通过所述通信单元从所述一个或多个DU接收第三响应，所述第三响应包括一个或多个小区对应的系统信息。
在一种可能的实现方式中，所述处理单元，还用于根据所述第二请求，通过所述通信单元向第二CU发送第四请求，所述第四请求用于请求一个或多个小区对应的系统信息；所述处理单元，还用于通过所述通信单元从所述第二CU接收第四响应，所述第四响应包括一个或多个小区对应的系统信息。
第十方面，提供了一种获取系统信息的装置，包括：通信单元和处理单元；所述处理单元，用于通过所述通信单元从终端接收第一请求，所述第一请求用于请求N个小区对应的系统信息，N为大于1的整数；所述处理单元，还用于根据所述第一请求，通过所述通信单元向所述终端发送第一响应，所述第一响应包括M个小区对应的系统信息，所述M个小区至少包括所述N个小区中的部分小区，M为大于0的整数。
在一种可能的实现方式中，所述第一请求包括用于指示所述N个小区的信息和用于指示所述N个小区中每个小区对应的系统信息的类型的信息；或者，所述第一请求包括用于指示所述N个小区的信息。
在一种可能的实现方式中，所述第一响应包括用于指示所述M个小区的信息和所述M个小区中每个小区对应的系统信息；或者，所述第一响应包括用于指示所述M个小区的信息、用于指示所述M个小区中每个小区对应的系统信息的类型的信息和所述M个小区中每个小区对应的系统信息。
在一种可能的实现方式中，所述处理单元，还用于根据所述第一请求本地获取一个或多个小区对应的系统信息。
在一种可能的实现方式中，所述处理单元，还用于根据所述第一请求，通过所述通信单元向其他接入网设备发送第五请求，所述第五请求用于请求一个或多个小区对应的系统信息；所述处理单元，还用于通过所述通信单元从所述其他接入网设备接收第五响应，所 述第五响应包括一个或多个小区对应的系统信息。
在一种可能的实现方式中，所述终端处于空闲态，所述第一请求为MAC CE信令或随机接入过程中的消息1或随机接入过程中的消息3；或者，所述终端处于连接态，所述第一请求为RRC信令或MAC CE信令。
第十一方面，提供了一种获取系统信息的装置，包括：处理器。处理器与存储器连接，存储器用于存储计算机执行指令，处理器执行存储器存储的计算机执行指令，从而实现第一方面，第二方面，第三方面、第四方面或第五方面中提供的任意一种方法。其中，存储器和处理器可以集成在一起，也可以为独立的器件。若为后者，存储器可以位于获取系统信息的装置内，也可以位于获取系统信息的装置外。
在一种可能的实现方式中，处理器包括逻辑电路以及输入接口和/或输出接口。其中，输出接口用于执行相应方法中的发送的动作，输入接口用于执行相应方法中的接收的动作。
在一种可能的实现方式中，获取系统信息的装置还包括通信接口和通信总线，处理器、存储器和通信接口通过通信总线连接。通信接口用于执行相应方法中的收发的动作。通信接口也可以称为收发器。可选的，通信接口包括发送器和接收器，该情况下，发送器用于执行相应方法中的发送的动作，接收器用于执行相应方法中的接收的动作。
在一种可能的实现方式中，获取系统信息的装置以芯片的产品形态存在。
第十二方面，提供了一种通信系统，包括：第一方面、第二方面和第四方面提供的获取系统信息的装置；或者，第一方面和第三方面提供的获取系统信息的装置；或者，第一方面和第五方面提供的获取系统信息的装置。
第十三方面，提供了一种计算机可读存储介质，包括指令，当该指令在计算机上运行时，使得计算机执行第一方面，第二方面，第三方面、第四方面或第五方面中提供的任意一种方法。
第十四方面，提供了一种包含指令的计算机程序产品，当该指令在计算机上运行时，使得计算机执行第一方面，第二方面，第三方面、第四方面或第五方面中提供的任意一种方法。
第六方面至第十四方面中的任一种实现方式所带来的技术效果可参见第一方面至第五方面中对应实现方式所带来的技术效果，此处不再赘述。
其中，需要说明的是，上述各个方面中的任意一个方面的各种可能的实现方式，在方案不矛盾的前提下，均可以进行组合。
附图说明
图1为本申请实施例提供的一种网络架构组成示意图；
图2为本申请实施例提供的一种获取系统信息的方法的流程图；
图3-图5分别为本申请实施例提供的一种请求中包括的信息的格式的示意图；
图6和图7分别为本申请实施例提供的一种响应中包括的信息的格式的示意图；
图8-图10分别为本申请实施例提供的一种获取系统信息的方法的流程图；
图11为本申请实施例提供的一种网络架构的组成示意图；
图12和图13分别为本申请实施例提供的一种获取系统信息的方法的流程图；
图14为本申请实施例提供的一种网络架构的组成示意图；
图15和图16分别为本申请实施例提供的一种获取系统信息的方法的流程图；
图17-图19分别为本申请实施例提供的一种获取系统信息的装置的组成示意图；
图20为本申请实施例提供的一种终端的硬件结构示意图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行描述。其中，在本申请的描述中，除非另有说明，“/”表示或的意思，例如，A/B可以表示A或B。本文中的“和/或”仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。并且，在本申请的描述中，除非另有说明，“多个”是指两个或多于两个。
另外，为了便于清楚描述本申请实施例的技术方案，在本申请的实施例中，采用了“第一”、“第二”等字样对功能和作用基本相同的相同项或相似项进行区分。本领域技术人员可以理解“第一”、“第二”等字样并不对数量和执行次序进行限定，并且“第一”、“第二”等字样也并不限定一定不同。
本申请实施例的技术方案可以应用于各种通信系统。例如：正交频分多址(orthogonal frequency-division multiple access，简称OFDMA)、单载波频分多址(single carrier FDMA，简称SC-FDMA)和其它系统等。术语“系统”可以和“网络”相互替换。OFDMA系统可以实现诸如演进通用无线陆地接入(evolved universal terrestrial radio access，简称E-UTRA)、超级移动宽带(ultra mobile broadband，简称UMB)等无线技术。E-UTRA是通用移动通信系统(universal mobile telecommunications system，简称UMTS)演进版本。第三代合作伙伴计划(3rd generation partnership project，简称3GPP)在长期演进(long term evolution，简称LTE)和基于LTE演进的各种版本是使用E-UTRA的新版本。第五代(5th-generation，简称5G)通信系统、NR是正在研究当中的下一代通信系统。此外，通信系统还可以适用于面向未来的通信技术，都适用本申请实施例提供的技术方案。
本申请实施例涉及到的网元包括接入网设备和终端。
终端也可以称为用户设备(user equipment，简称UE)、终端设备、接入终端、用户单元、用户站、移动站、远方站、远程终端、移动设备、用户终端、无线通信设备、用户代理或用户装置等。终端可以是无人机、物联网(internet of things，简称IoT)设备(例如，传感器，电表，水表等)、车联网(vehicle-to-everything，简称V2X)设备、无线局域网(wireless local area networks，简称WLAN)中的站点(station，简称ST)、蜂窝电话、无绳电话、会话启动协议(session initiation protocol，简称SIP)电话、无线本地环路(wireless local loop，简称WLL)站、个人数字处理(personal digital assistant，简称PDA)设备、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备(也可以称为穿戴式智能设备)。终端还可以为下一代通信系统中的终端，例如，5G通信系统中的终端或者未来演进的公共陆地移动网络(public land mobile network，简称PLMN)中的终端，NR通信系统中的终端等。
接入网设备可以是各种形式的宏基站，微基站(也称为小站)，中继站，接入点(access point，简称AP)等，也可以包括各种形式的控制节点，如网络控制器。所述控制节点可以连接多个基站，并为所述多个基站覆盖下的多个终端配置资源。在采用不同的无线接入技术的系统中，具备基站功能的设备的名称可能会有所不同，例如，全球移动通信系统(global system for mobile communication，简称GSM)或码分多址(code division multiple  access，简称CDMA)网络中可以称为基站收发信台(base transceiver station，简称BTS)，宽带码分多址(wideband code division multiple access，简称WCDMA)中可以称为基站(NodeB)，LTE系统中可以称为演进型基站(evolved NodeB，简称eNB或eNodeB)，5G通信系统或NR通信系统中可以称为下一代基站节点(next generation node base station，简称gNB)，本申请对基站的具体名称不作限定。接入网设备还可以是云无线接入网络(cloud radio access network，简称CRAN)场景下的无线控制器、未来演进的PLMN网络中的接入网设备、传输接收节点(transmission and reception point，简称TRP)等。
在R15的通信标准中，针对NR的接入网设备(例如，gNB)，定义了分离式架构，即根据协议栈功能将接入网设备拆分为两个部分：CU和DU。CU具有业务数据适配协议(service data adaptation protocol，简称SDAP)层、分组数据汇聚协议(packet data convergence protocol，简称PDCP)层和RRC层的功能；DU具有无线链路控制(radio link control，简称RLC)层、媒介接入控制(medium access control，简称MAC)层和物理(Physical，简称PHY)层的功能。
一个接入网设备可以包含一个CU和多个DU，CU和DU之间采用F1接口进行连接。CU与其他的接入网设备采用Xn接口连接。CU与5G通信网络的核心网(5G core，简称5GC)之间采用NG接口连接。标准中规定，一个CU可以连接多个DU，一个DU只能连接一个CU。在实现的过程中，考虑到系统的稳定性，一个DU可以连接多个CU。接入网中包括多个接入网设备，多个接入网设备可以均采用分离式架构，也可以均采用集中式架构(即不拆分为CU和DU两个部分的接入网设备)，还可以部分采用分离式架构，部分采用集中式架构。例如，参见图1，接入网设备1和接入网设备2采用分离式架构，接入网设备3采用集中式架构。DU和接入网设备可以覆盖一个小区，也可以覆盖多个小区。示例性的，参见表1，表1示出了图1所示的网络架构下DU和接入网设备以及所覆盖的小区之间的对应关系。
表1
Figure PCTCN2020072306-appb-000001
本申请实施例描述的系统架构以及业务场景是为了更加清楚的说明本申请实施例的技术方案，并不构成对于本申请实施例提供的技术方案的限定。本领域普通技术人员可知，随着网络架构的演变和新业务场景的出现，本申请实施例提供的技术方案对于类似的技术问题，同样适用。
为了使得本申请实施例更加的清楚，以下对本申请实施例提供的方法中涉及到的系统信息部分的内容作简单介绍。
1、系统信息
系统信息的作用主要是告知终端小区的配置信息，以便终端接入该小区并在该小区内正确地工作。3GPP标准中将系统信息分为最少(Minimum)系统信息和其他(Other)系统信息。Minimum系统信息包含MIB和SIB1两类信息，Other系统信息包括SIB2及其以上的系统信息。在LTE系统中，已经定义了MIB、SIB1和SIB2-SIB21等。每个系统信息包含了与某个功能相关的一系列参数集合。其中，MIB中包含了一些数量有限但最重要也 最频繁被发送和使用的参数，如上下行带宽，物理混合自动重传请求(automatic repeat-request，简称ARQ)指示信道(physical hybrid-ARQ indicator channel，简称PHICH)参数，系统帧号(system frame number，简称SFN)等，同时MIB中也包含了终端获取SIB1所需要的参数。LTE的SIB1主要包含了与小区选择和驻留相关信息，如PLMN、小区禁止状态、小区选择参数、封闭用户组(closed subscriber group，简称CSG)标识等，同时SIB1中还包含了其他SIB的调度信息，终端基于SIB1中的信息来获取SIB2及以上的系统信息。再比如，LTE的SIB2主要包含了小区公共的无线资源配置信息，对终端通用。LTE的SIB9中包含了家庭基站的名字信息。在NR通信系统中，由于NR标准还在持续推进中，现有标准中只定义了MIB、SIB1和SIB2-SIB9系统信息。相对于LTE系统，NR系统的SIBx并不对应LTE的SIBx，如NR的SIB1对应LTE SIB1和SIB2的功能，NR SIB2-SIB9依次对应LTE SIB3-SIB6、SIB10-SIB12、SIB16的功能。此外，LTE和NR中具有相同功能的系统信息可以包含，也可以不包含相同的信元。
在本申请实施例中，SIBx中的x是指SIB的类型，SIBx是指类型x的SIB，类型x中的x是指类型的标识(也可以称为索引或序号)。例如，SIB5是指类型5的SIB。类型5是指标识为5的类型。x为整数。
2、系统信息的获取方法
为了能正常接入小区，终端在完成扫频和下行小区同步之后，还需要继续读取小区对应的一种或多种类型的系统信息。MIB和SIB1这两种类型的系统信息一般是由接入网网元周期性广播，其他类型的SIB可有选择性地被周期性广播。在LTE中，对于空闲(idle)态的终端，无论终端什么时候开机，都能及时的获取到被周期性广播的系统信息。MIB在物理广播信道(physical broadcast channel，简称PBCH)上被广播，而其他类型的系统信息(SIB1和其他需要广播的SIB)在物理下行共享信道(physical downlink shared channel，简称PDSCH)上被广播。MIB中包含SIB1被发送的时频信息，终端在PBCH信道上接收到MIB后，按照MIB中指示的时频信息在PDSCH接收SIB1。SIB1会指示SIB2-SIBx被调度的时频信息，终端在读取SIB1后，按照SIB1中指示的时频信息，在PDSCH接收其他SIB。
相对于LTE，NR中增加了一种新的终端获取系统信息的方式：按需(On-Demand)获取。具体可以通过按需请求(On-Demand Request)获取,即当终端发现某些系统信息未被广播，而且终端又需要这些系统信息时，终端可主动向接入网网元发出请求，接入网网元进而可以将系统信息发送给终端。对于连接(connected)态的终端，接入网网元还可以通过RRC信令发送系统信息。示例性的，RRC信令可以为RRC重配置(RRCReconfiguration)信令。
R15的标准中，对于空闲态的终端，终端按需获取系统信息的两种方式分别为:1、终端在MSG1中发送前导码(Preamble)，Preamble与终端所需的系统信息类型有映射关系，接入网网元收到MSG1后，根据MSG1携带的Preamble以及映射关系可解析出终端所需的系统信息，进而将终端所需的系统信息发送给终端；2、终端发送RRCSystemInfoRequest信令向接入网网元请求所需的系统信息，RRCSystemInfoRequest信令中携带终端所需的系统信息的类型的信元，接入网网元进而将终端所需的系统信息发送给终端。其中，RRCSystemInfoRequest是一种可通过随机接入过程中的MSG3发送的信息。
示例性的，LTE定义了CSG小区的概念，只有拥有相应权限的终端才能接入CSG小区。终端要想接入CSG小区需要首先判别一个小区是否为CSG小区，这是通过终端接收SIB1实现的，LTE的SIB1中包含参数CSG指示(CSG indication)和CSG ID(CSG Identity)，分别标识了相应小区是否为CSG小区以及相应CSG小区的ID。CSG的典型应用场景是家庭基站场景。如果用户采用人工选择的方式(Manual CSG selection)接入家庭基站时，需要终端将周围可供选择的家庭基站的名字以列表的形式展示给用户，而LTE中家庭基站的名字是包含在SIB9中的(注：NR标准中还未定义家庭基站名字具体包含在哪一个系统信息中)。综上，终端展示家庭基站列表的流程可大致总结为：终端通过接收SIB1判断一个小区为CSG小区后，则基于SIB1中指示的SIB9的时频信息从小区的PDSCH信道接收SIB9，进而从SIB9中读取相应家庭基站名字并将家庭基站的名字加入到可供选择列表。然而，包含有家庭基站名字的系统信息并不总被广播，所以当用户需要家庭基站名字时，在NR中可通过按需获取的方式获取包含有家庭基站名字的SIB。
用户可通过On-demand请求获取所需要的未被广播的系统信息。对于分离式的基站架构，如果终端需要知道多个DU下的On-Demand系统信息，终端就需要分别向多个DU分别发送随机接入过程中的MSG1或者RRCSystemInfoRequest或者其他RRC请求，并且，终端一次仅能请求一个小区对应的系统信息。随后每个DU通过F1接口向CU上报终端的系统信息请求，CU再通过F1接口将相应的系统信息发送给DU，DU再转发给终端。可见，以上过程中，终端和多个DU、多个DU与CU间分别进行着类似的信令交互流程，信令交互效率较低。类似的，对于集中式基站架构，用户要获取多个基站的On-Demand系统信息，就需要分别与各个基站交互信令，并且，终端一次仅能请求一个小区对应的系统信息，交互效率较低。
本申请实施例提供了一种获取系统信息的方法，该方法可以应用于普通小区对应的系统信息的获取，也可以应用于CSG小区/封闭访问组(closed access group，简称CAG)小区对应的系统信息的获取。其中，CSG小区对应的系统信息中可以包括CSG indication(用于指示是否为CSG小区的信息，具体也可以为其他名称)、CSG ID(用于指示CSG小区，具体也可以为其他名称)、家庭基站的名称等信息。CAG小区对应的系统信息中可以包括CAG indication(用于指示是否为CAG小区的信息，具体也可以为其他名称)、CAG ID(用于指示CAG小区，具体也可以为其他名称)、CAG基站的名称等信息。其中，普通小区是指除CSG小区和CAG小区之外的小区。
如图2所示，该获取系统信息的方法包括：
201、终端向接入网网元发送第一请求，第一请求用于请求N个小区对应的系统信息，N为大于1的整数。
可选的，接入网网元为接入网设备，或者，接入网网元为DU。
N个小区可以为同一个接入网设备覆盖的小区。例如，参见表1，假设N＝3，N个小区可以为接入网设备3覆盖的小区7、小区8和小区9。
N个小区也可以为不同接入网设备覆盖的小区。例如，参见表1，假设N＝3，N个小区可以为接入网设备3覆盖的小区7、小区8和接入网设备1覆盖的小区1。
N个小区可以为同一个DU覆盖的小区。例如，参见表1，假设N＝2，N个小区可以为DU11覆盖的小区1和小区2。
N个小区也可以为不同DU覆盖的小区，所述不同DU可以连接同一个CU，也可以连接不同的CU。例如，参见表1，假设N＝3，不同DU连接不同的CU时，N个小区可以为DU11覆盖的小区1、小区2和DU21覆盖的小区4。不同DU连接同一个CU时，N个小区可以为DU11覆盖的小区1、小区2和DU12覆盖的小区3。
本申请实施例中的一个小区对应的系统信息是指终端未接收到、但是需要获取的系统信息，即一个小区对应的系统信息是指该小区的On-Demand系统信息。
N个小区中的不同的小区对应的系统信息的类型可以相同也可以不同。例如，在N个小区中的不同的小区对应的系统信息的类型相同的情况下，若N个小区为小区1和小区2，小区1和小区2对应的系统信息的类型可以均为SIB的类型5。在N个小区中的不同的小区对应的系统信息的类型不同的情况下，若N个小区为小区1和小区2，小区1对应的系统信息的类型可以为SIB的类型5，小区2对应的系统信息的类型可以为SIB的类型7。
N个小区中的不同的小区对应的系统信息的个数可以相同也可以不同。例如，在N个小区中的不同的小区对应的系统信息的个数相同的情况下，若N个小区为小区1和小区2，小区1对应的系统信息可以为SIB5，小区2对应的系统信息可以为SIB9。在N个小区中的不同的小区对应的系统信息的个数不同的情况下，若N个小区为小区1和小区2，小区1对应的系统信息可以为SIB5和SIB7，小区2对应的系统信息可以为SIB9。
202、终端从接入网网元接收第一响应，第一响应包括M个小区对应的系统信息，M个小区至少包括N个小区中的部分小区，M为大于0的整数。
现有技术中，终端一次只能请求一个小区对应的系统信息，与现有的获取小区对应的系统信息的方式相比，本申请实施例提供的方法中，终端可以一次性获取多个小区对应的系统信息，提高信令交互效率，降低空口信令开销。
可选的，第一请求包括用于指示N个小区的信息和用于指示N个小区中每个小区对应的系统信息的类型的信息；或者，第一请求包括用于指示N个小区的信息；或者，第一请求包括用于指示N个小区中每个小区对应的系统信息的类型的信息；或者，第一请求包括指示信息和用于指示系统信息的类型的信息，指示信息用于指示是否请求多个小区对应的系统信息。
在第一请求包括用于指示N个小区的信息和用于指示N个小区中每个小区对应的系统信息的类型的信息的情况下，用于指示N个小区的信息和用于指示N个小区中每个小区对应的系统信息的类型的信息之间具有一一对应的关系。
在第一请求仅包括用于指示N个小区的信息的情况下，N个小区中每个小区对应的系统信息的类型可以为预先设置的或通过其他消息携带给接入网网元的。
在第一请求包括用于指示N个小区中每个小区对应的系统信息的类型的信息的情况下，用于指示N个小区的信息可以为预先设置的或通过其他消息携带给接入网网元的。
在第一请求包括指示信息和用于指示系统信息的类型的信息的情况下，接入网网元接收到第一请求后，可以基于产品实现向终端发送一个或多个小区对应的系统信息。例如，在第一请求中包括指示信息和携带家庭基站的信息的系统信息(例如，LTE中的SIB9)的类型时，接入网网元可以将全部CSG小区对应的携带家庭基站的信息的系统信息向终端发送。其中，指示信息可以通过一个bit的取值指示，该bit的取值不同表示的含义不同。例如，当该bit的取值为1时，该指示信息用于指示请求多个小区对应的系统信息，当该bit 的取值为0时，该指示信息用于指示请求单个小区对应的系统信息。当然，指示信息也可以通过多个bit指示，本申请实施例对此不作具体限定。
本申请实施例中的用于指示一个小区的信息是指唯一标识该小区的信息，可以称为小区唯一标识。一个小区的唯一标识可以为小区的小区全局标识(cell global identifier，简称CGI)，在NR中，CGI可以称为NR CGI。针对CSG小区，CSG小区的唯一标识可以为CSG ID。针对CAG小区，CAG小区的唯一标识可以为CAG ID。当用于指示一个小区的信息为该小区的唯一标识时，用于指示N个小区的信息可以为小区唯一标识列表，该小区唯一标识列表中包括N个小区的唯一标识。
本申请实施例中的用于指示一个小区对应的系统信息的类型的信息可以为该小区对应的系统信息的类型的标识。用于指示N个小区对应的系统信息的类型的信息可以为一个系统信息类型标识列表，该系统信息类型标识列表中包括N个小区对应的系统信息的类型。
可选的，终端处于空闲态，第一请求为MAC控制元素(MAC control element，简称MAC CE)信令或随机接入过程中的消息1或随机接入过程中的消息3；或者，终端处于连接态，第一请求为RRC信令或MAC CE信令。
示例性的，消息3可以为RRCSystemInfoRequest。
在第一请求为RRCSystemInfoRequest的情况下，小区唯一标识列表和系统信息类型标识列表可以为图3所示格式，也可以为图4所示格式。
在第一请求为消息1的情况下，小区唯一标识列表可以为图5所示格式，即在Preamble后面加相应的数据，该数据用以携带小区唯一标识列表。该情况下，Preamble与终端所需的系统信息类型有映射关系，Preamble可以与系统信息的一种类型有映射关系，也可以与系统信息的多种类型有映射关系。假设小区1、小区2、小区3和小区4的唯一标识分别为图5中的NR CGI1、NR CGI2、NR CGI3和NR CGI4。一种可能的实现方式，Preamble可以与系统信息的类型5有映射关系，该情况下，图5所示的示例的含义可以为终端需要获取小区1、小区2、小区3和小区4中的每个小区对应的SIB5。另一种可能的实现方式，Preamble可以与系统信息的类型5和类型6有映射关系，该情况下，图5所示的示例的含义可以为终端需要获取小区1、小区2、小区3和小区4中的每个小区对应的SIB5和SIB6。
可选的，第一响应包括用于指示M个小区的信息和M个小区中每个小区对应的系统信息；或者，第一响应包括用于指示M个小区的信息、用于指示M个小区中每个小区对应的系统信息的类型的信息和M个小区中每个小区对应的系统信息。
其中，在第一响应包括用于指示M个小区的信息和M个小区中每个小区对应的系统信息的情况下，用于指示M个小区的信息和M个小区中每个小区对应的系统信息之间具有一一对应的关系。在第一响应包括用于指示M个小区的信息、用于指示M个小区中每个小区对应的系统信息的类型的信息和M个小区中每个小区对应的系统信息的情况下，用于指示M个小区的信息、用于指示M个小区中每个小区对应的系统信息的类型的信息和M个小区中每个小区对应的系统信息之间具有一一对应的关系。
当用于指示一个小区的信息为该小区的唯一标识时，用于指示M个小区的信息可以为一个小区唯一标识列表，该小区唯一标识列表中包括M个小区的唯一标识。用于指示M个小区对应的系统信息的类型的信息可以为一个系统信息类型标识列表，该系统信息类型标识列表中包括M个小区对应的系统信息的类型。M个小区对应的系统信息可以为一个 系统信息列表，系统信息列表中包括M个小区对应的系统信息。
在第一响应包括用于指示M个小区的信息、用于指示M个小区中每个小区对应的系统信息的类型的信息和M个小区中每个小区对应的系统信息的情况下，小区唯一标识列表、系统信息类型标识列表和系统信息列表可以为图6或图7中的情况1所示格式。在第一响应包括用于指示M个小区的信息和M个小区中每个小区对应的系统信息的情况下，小区唯一标识列表和系统信息列表可以为图6和图7中的情况2所示格式。
在图3至图7中，以小区的唯一标识为NR CGI为例进行说明。系统信息类型标识列表可以通过多比特编码或者字符串等表示。终端请求的系统信息的类型可以通过多个比特位指示。一种可能的实现方式，多个比特位中的部分或全部比特位用于指示系统信息的一种类型。例如，该多个比特位中每3个比特位指示一个系统信息的类型，假设多个比特位为011110，则表示终端请求的系统信息的类型为类型3和类型7。另一种可能的实现方式，多个比特位中的一个比特位用于指示1个系统信息的类型是否被请求，一个比特位的值为1(或0)时，表示该比特对应的系统信息的类型被请求。例如，假设总共有10个系统信息的类型，一个比特位用于指示10个系统信息的类型中的1个系统信息的类型是否被请求。假设比特位的值为1时，表示该比特对应的系统信息的类型被请求，则若10个比特位为1100011000，则表示10个系统信息的类型中的第1个、第2个、第6个和第7个系统信息的类型被请求。
可选的，步骤201在具体实现时包括：终端获取N个小区的唯一标识和N个小区中每个小区对应的系统信息的类型，并根据N个小区的唯一标识和N个小区中每个小区对应的系统信息的类型向接入网网元发送第一请求。该可选的方法在具体实现时，空闲态的终端可以根据SIB1获取小区的小区标识(Cell ID)和PLMN ID，根据Cell ID和PLMN ID确定小区的CGI。连接态的终端可以根据SIB1或RRC信令获取小区的Cell ID和PLMN ID，进而确定小区的CGI。另外，不论是空闲态的终端还是连接态的终端，都可以本地获取小区的唯一标识，本申请实施例中对终端获取小区的唯一标识的方式不作具体限定。
在终端向接入网网元发送第一请求之前，终端可以根据N个小区的唯一标识生成小区唯一标识列表，根据N个小区中每个小区对应的系统信息的类型生成系统信息类型标识列表。
需要说明的是，若M个小区包含N个小区中的N1个小区，则在步骤202之后，上述方法还可以包括：
203、终端向其他接入网网元发送用于请求N2个小区对应的系统信息的请求，所述N2个小区为所述N个小区中的除所述N1个小区之外的小区，N1和N2均为大于0的整数。
在步骤203之前，终端可以判断M个小区是否包含了N个小区，若否，则执行步骤203。若步骤203之后，终端仍未获取到N个小区中的全部小区对应的系统信息，则终端还可以再向其他接入网网元请求小区对应的系统信息，直至获取到N个小区中的全部小区对应的系统信息。
需要说明的是，步骤203中的其他接入网网元可以为接入网设备，也可以为DU，本申请实施例对此不作具体限定。
其中，将接入网设备和DU看作两种不同类型的接入网网元。将MAC CE信令、消息 1、消息3、RRC信令等看作第一请求的不同的信令类型。则在接入网网元的类型不同以及第一请求的信令类型不同时，上述方法的具体实现过程略有差异，为了更加清楚的说明本申请，以下通过实施例一至实施例三对上述实施例提供的方法作进一步的说明，实施例一至实施例三中的与上述实施例中相同或相关内容的解释可参见上文，不再赘述。
实施例一
适用场景：
(1)接入网网元为DU，终端处于空闲态，第一请求为随机接入过程中的消息3。
(2)接入网网元为DU，终端处于连接态，第一请求为RRC信令。
场景(1)和场景(2)下，DU均无法解析第一请求中包含的信息。
参见图8，实施例一提供的方法包括：
801、终端向DU(记为第一DU)发送第一请求，第一请求用于请求N个小区对应的系统信息。相应的，第一DU从终端接收第一请求。
关于第一请求的描述可参见图2的实施例中的相关描述，此处不再赘述。
802、第一DU根据第一请求向第一CU发送第二请求，第二请求用于为终端请求N个小区对应的系统信息。相应的，第一CU从第一DU接收第二请求。
其中，第一CU可以为与第一DU连接的CU。由于第一DU无法解析第一请求中包含的信息，因此，第一DU可以直接将第一请求中包含的信息携带在第二请求中向第一CU发送。
803、第一CU根据第二请求向第一DU发送第二响应，第二响应包括M个小区对应的系统信息，M个小区至少包括N个小区中的部分小区。相应的，第一DU从第一CU接收第二响应。
其中，第二请求和第二响应可以为F1接口消息，示例性的，第二请求可以为初始上行RRC信息传输(Initial UL RRC Message Transfer)，第二响应可以为系统信息传输命令(System Information Delivery Command)。
804、第一DU向终端发送第一响应，第一响应包括M个小区对应的系统信息。相应的，终端从第一DU接收第一响应，从而根据第一响应获取M个小区对应的系统信息。
关于第一响应的描述可参见图2的实施例中的相关描述，此处不再赘述。
其中，第一DU可以直接将第二响应中包含的信息携带在第一响应中向终端发送。在终端处于空闲态的情况下，第一DU可以通过广播的方式向终端发送第一响应。在终端处于连接态的情况下，第一DU可以通过广播的方式或RRC信令向终端发送第一响应。
现有技术中，终端一次只能请求一个小区对应的系统信息，与现有的获取小区对应的系统信息的方式相比，本申请实施例提供的方法中，终端可以一次性获取多个小区对应的系统信息，提高信令交互效率，降低空口信令开销。
可选的，第二请求包括：用于指示N个小区的信息和用于指示N个小区中每个小区对应的系统信息的类型的信息；或者，用于指示N个小区的信息；或者，用于指示N个小区中每个小区对应的系统信息的类型的信息；或者，指示信息和用于指示系统信息的类型的信息，指示信息用于指示是否请求多个小区对应的系统信息。
第二响应包括：用于指示所述M个小区的信息和所述M个小区中每个小区对应的系统信息；或者，用于指示所述M个小区的信息和用于指示所述M个小区中每个小区对应 的系统信息的类型的信息；或者，用于指示所述M个小区的信息、用于指示所述M个小区中每个小区对应的系统信息的类型的信息和所述M个小区中每个小区对应的系统信息。
其中，第二请求和第二响应中包含的信息的格式可分别参见第一请求和第一响应中包含的信息的格式。在第二响应包括用于指示所述M个小区的信息和用于指示所述M个小区中每个小区对应的系统信息的类型的信息的情况下，第二响应中包含的信息的格式与图3类似，在此不再赘述。
在第二响应包括用于指示所述M个小区的信息和用于指示所述M个小区中每个小区对应的系统信息的类型的信息的情况下，第一DU可以本地存储多个小区对应的系统信息，但第一DU不能解析终端发送的第一请求。此时，第一CU只需要通过第二响应将M个(或N个)小区对应的系统信息的类型告知第一DU即可，第一DU根据M个(或N个)小区对应的系统信息的类型确定M个(或N个)小区对应的系统信息，并通过第一响应向终端反馈。
可选的，在步骤803之前，该方法还包括：第一CU根据第二请求本地获取一个或多个小区对应的系统信息。其中，该一个或多个小区属于M个小区。
可选的，在步骤803之前，该方法还包括：
11)第一CU根据第二请求向一个或多个DU发送第三请求，第三请求用于请求一个或多个小区对应的系统信息。相应的，一个或多个DU从第一CU接收第三请求。
12)一个或多个DU根据第三请求向第一CU发送第三响应，第三响应包括一个或多个小区对应的系统信息。相应的，第一CU从一个或多个DU接收第三响应。
其中，第三请求中包含的信息与第二请求中包含的信息类似，第三响应中包含的信息与第二响应中包含的信息类似。第三请求和第三响应中包含的信息的格式可分别参见第二请求和第二响应中包含的信息的格式，不再赘述。
需要说明的是，第三响应包括的一个或多个小区对应的系统信息可以为第三请求所请求的一个或多个小区中的部分或全部小区对应的系统信息。第三响应包括的一个或多个小区对应的系统信息为M个小区中的部分或全部小区对应的系统信息。
其中，一个或多个DU可以包括第一DU，也可以不包括第一DU。一个或多个DU可以为与第一CU具有F1接口连接的DU。第三请求和第三响应可以为F1接口消息，示例性的，第三请求可以为F1建立请求(F1 Setup Request)或gNB-CU配置更新(gNB-CU Configuration Update)，第三响应可以为F1建立响应(F1 Setup Response)或gNB-CU配置更新确认(gNB-CU Configuration Update Acknowledge)。
需要说明的是，步骤11)和步骤12)可以在第一CU从第一DU接收到第二请求之后执行，也可以在之前执行，本申请实施例对此不作限定。
可选的，在步骤803之前，该方法还包括：
21)第一CU根据第二请求向第二CU发送第四请求，第四请求用于请求一个或多个小区对应的系统信息。相应的，第二CU从第一CU接收第四请求。
22)第二CU根据第四请求向第一CU发送第四响应，第四响应包括一个或多个小区对应的系统信息。相应的，第一CU从第二CU接收第四响应。
其中，第四请求中包含的信息与第二请求中包含的信息类似，第四响应中包含的信息与第二响应中包含的信息类似。第四请求和第四响应中包含的信息的格式可参见第二请求 和第二响应中包含的信息的格式，不再赘述。
需要说明的是，第四响应包括的一个或多个小区对应的系统信息可以为第四请求所请求的一个或多个小区中的部分或全部小区对应的系统信息。第四响应包括的一个或多个小区对应的系统信息为M个小区中的部分或全部小区对应的系统信息。
其中，第二CU可以为与第一CU具有Xn连接的CU。第四请求和第四响应可以为Xn消息，示例性的，第四请求可以为Xn建立请求(Xn Setup Request)或者下一代无线网络节点配置更新(NG-RAN node Configuration Update)，第四响应可以为Xn建立响应(Xn Setup Response)或者下一代无线网络节点配置更新确认(NG-RAN node Configuration Update Acknowledge)。
需要说明的是，步骤21)和步骤22)可以在第一CU从第一DU接收到第二请求之后执行，也可以在之前执行，本申请实施例对此不作限定。
需要说明的是，步骤11)和步骤12)可以在步骤21)和步骤22)之后执行，也可以在之前执行，本申请实施例对此不作限定。
步骤803在具体实现时，在不同的情况下，第一CU执行的动作可以不同，以下基于情况1和情况2分别进行描述。
情况1、第一DU请求的为N个小区对应的系统信息，第一CU在向第一DU反馈小区对应的系统信息时，仅反馈第一DU请求的小区对应的系统信息。
若第一CU中有N个小区中的部分或全部小区对应的系统信息，则第一CU可以将N个小区中的部分或全部小区对应的系统信息发送给第一DU。其中，第一CU中的任意一个小区对应的系统信息可以是第一CU生成的，也可以是第一CU从其他设备(例如，DU或第二CU)获取并存储在第一CU中的。
若第一CU中有N个小区中的N1(N1为大于0的整数)个小区对应的系统信息，则第一CU可以向连接的DU或其他CU请求N2个小区对应的系统信息，并将请求到的小区对应的系统信息和第一CU中的N1个小区对应的系统信息发送给第一DU。其中，N2个小区为N个小区中的除N1个小区之外的小区，请求到的小区对应的系统信息和第一CU中的N1个小区对应的系统信息即M个小区对应的系统信息，M个小区对应的系统信息可以一次或多次发送给第一DU。例如，第一CU先将获取到的N1个小区对应的系统信息发送给第一DU，再将从连接的DU或其他CU请求到的小区对应的系统信息发送给第一DU。
若第一CU中没有N个小区中的任意一个小区对应的系统信息，则第一CU可以向连接的DU或其他CU请求N个小区对应的系统信息，并将请求到的小区对应的系统信息发送给第一DU。其中，请求到的小区对应的系统信息即M个小区对应的系统信息。
在情况1中，若M小于N，终端可以向其他DU继续请求N个小区中的除M个小区之外的小区对应的系统信息，直至获取到N个小区对应的系统信息。
情况2、第一DU请求的为N个小区对应的系统信息，第一CU既反馈第一DU请求的小区对应的系统信息，还反馈第一DU未请求的小区对应的系统信息。
该情况下，假设S个小区对应的系统信息为第一DU未请求但第一CU发送的小区对应的系统信息。
若第一CU中有N+S个小区中的部分或全部小区对应的系统信息，则第一CU可以将N+S个小区中的部分或全部小区对应的系统信息发送给第一DU。其中，N+S个小区即N 个小区和S个小区之和。
若第一CU中有N+S个小区中的X1(X1为大于0的整数)个小区对应的系统信息，则第一CU可以向连接的DU或其他CU请求X2个小区对应的系统信息，并将请求到的小区对应的系统信息和第一CU中的X1个小区对应的系统信息发送给第一DU。其中，X2个小区为N+S个小区中的除X1个小区之外的小区，请求到的小区对应的系统信息和第一CU中的X1个小区对应的系统信息即M个小区对应的系统信息，M个小区对应的系统信息可以一次或多次发送给第一DU。例如，第一CU先将获取到的X1个小区对应的系统信息发送给第一DU，再将从连接的DU或其他CU请求到的小区对应的系统信息发送给第一DU。
若第一CU中没有N+S个小区中的任意一个小区对应的系统信息，则第一CU可以向连接的DU或其他CU请求N+S个小区对应的系统信息，并将请求到的小区对应的系统信息发送给第一DU。其中，请求到的小区对应的系统信息即M个小区对应的系统信息。
在M个小区未包含N个小区的情况下，终端可以向其他DU继续请求N个小区中的除收到的小区之外的小区对应的系统信息。
实施例二
适用场景：
(3)接入网网元为DU，终端处于空闲态，第一请求为MAC CE信令或随机接入过程中的消息1。
(4)接入网网元为DU，终端处于连接态，第一请求为MAC CE信令。
场景(3)和场景(4)下，DU均能够解析第一请求中包含的信息。
参见图9，实施例二提供的方法包括：
901、终端向DU发送第一请求，第一请求用于请求N个小区对应的系统信息。相应的，DU从终端接收第一请求。
关于第一请求的描述可参见图2的实施例中的相关描述，此处不再赘述。
902、DU根据第一请求向终端发送第一响应，第一响应包括M个小区对应的系统信息，M个小区至少包括N个小区中的部分小区。相应的，终端从DU接收第一响应，从而根据第一响应获取M个小区对应的系统信息。
关于第一响应的描述可参见图2的实施例中的相关描述，此处不再赘述。
其中，在终端处于空闲态的情况下，DU可以通过广播的方式或MAC CE向终端发送第一响应。在终端处于连接态的情况下，DU可以通过广播的方式或RRC信令或MAC CE信令向终端发送第一响应。
现有技术中，终端一次只能请求一个小区对应的系统信息，与现有的获取小区对应的系统信息的方式相比，本申请实施例提供的方法中，终端可以一次性获取多个小区对应的系统信息，提高信令交互效率，降低空口信令开销。
可选的，在步骤902之前，该方法还可以包括：DU根据第一请求本地获取一个或多个小区对应的系统信息。其中，该一个或多个小区属于M个小区。
可选的，在步骤902之前，该方法还包括：11)DU与第一CU交互获取一个或多个小区对应的系统信息。其中，第一CU可以为与DU连接的CU。该一个或多个小区属于M个小区。
其中，步骤11)在具体实现时可以包括：
21)DU根据第一请求向第一CU发送第六请求，第六请求用于请求一个或多个小区对应的系统信息。相应的，第一CU从DU接收第六请求。
22)第一CU根据第六请求向DU发送第六响应，第六响应包括一个或多个小区对应的系统信息。相应的，DU从第一CU接收第六响应。
其中，第六请求和第六响应可以为F1接口消息，示例性的，第六请求可以为初始上行RRC信息传输(Initial UL RRC Message Transfer)，第六响应可以为系统信息传输命令(System Information Delivery Command)。
其中，第六请求中包含的信息与第二请求中包含的信息类似，第六响应中包含的信息与第二响应中包含的信息类似。第六请求和第六响应中包含的信息的格式可分别参见第二请求和第二响应中包含的信息的格式，不再赘述。
需要说明的是，第六响应包括的一个或多个小区对应的系统信息可以为第六请求所请求的一个或多个小区中的部分或全部小区对应的系统信息。第六响应包括的一个或多个小区对应的系统信息为M个小区中的部分或全部小区对应的系统信息。
步骤902在具体实现时，在不同的情况下，各个网元执行的动作可以不同，以下基于情况3和情况4分别进行描述。
情况3、终端请求的为N个小区对应的系统信息，DU在向终端反馈小区对应的系统信息时，仅反馈终端请求的小区对应的系统信息。
若DU中有N个小区中的部分或全部小区对应的系统信息，则DU可以将N个小区中的部分或全部小区对应的系统信息发送给终端。其中，DU中的任意一个小区对应的系统信息可以是DU生成的，也可以是DU从其他设备(例如，第一CU)获取并存储在DU中的。
若DU中有N个小区中的N1(N1为大于0的整数)个小区对应的系统信息，则DU可以向第一CU请求N2个小区对应的系统信息，并将请求到的小区对应的系统信息和DU中的N1个小区对应的系统信息发送给终端。其中，N2个小区为N个小区中的除N1个小区之外的小区，请求到的小区对应的系统信息和DU中的N1个小区对应的系统信息即M个小区对应的系统信息，M个小区对应的系统信息可以一次或多次发送给终端。例如，DU先将获取到的N1个小区对应的系统信息发送给终端，再将从第一CU请求到的小区对应的系统信息发送给终端。
若DU中没有N个小区中的任意一个小区对应的系统信息，则DU可以向第一CU请求N个小区对应的系统信息，并将请求到的小区对应的系统信息发送给终端。其中，请求到的小区对应的系统信息即M个小区对应的系统信息。
在情况3中，若M小于N，终端可以向其他DU继续请求N个小区中的除M个小区之外的小区对应的系统信息，直至获取到N个小区对应的系统信息。
情况4、终端请求的为N个小区对应的系统信息，DU既反馈终端请求的小区对应的系统信息，还反馈终端未请求的小区对应的系统信息。
该情况下，假设S个小区对应的系统信息为终端未请求但DU发送的小区对应的系统信息。
若DU中有N+S个小区中的部分或全部小区对应的系统信息，则DU可以将N+S个 小区中的部分或全部小区对应的系统信息发送给终端。其中，N+S个小区即N个小区和S个小区之和。
若DU中有N+S个小区中的X1(X1为大于0的整数)个小区对应的系统信息，则DU可以向第一CU请求X2个小区对应的系统信息，并将请求到的小区对应的系统信息和DU中的X1个小区对应的系统信息发送给终端。其中，X2个小区为N+S个小区中的除X1个小区之外的小区，请求到的小区对应的系统信息和DU中的X1个小区对应的系统信息即M个小区对应的系统信息，M个小区对应的系统信息可以一次或多次发送给终端。例如，DU先将获取到的X1个小区对应的系统信息发送给终端，再将从第一CU请求到的小区对应的系统信息发送给终端。
若DU中没有N+S个小区中的任意一个小区对应的系统信息，则DU可以向第一CU请求N+S个小区对应的系统信息，并将请求到的小区对应的系统信息发送给终端。其中，请求到的小区对应的系统信息即M个小区对应的系统信息。
在M个小区未包含N个小区的情况下，终端可以向其他DU继续请求N个小区中的除收到的小区之外的小区对应的系统信息。
在情况3和情况4中，第一CU接收到DU发送的用于请求一个或多个小区对应的系统信息的请求后，可以采用实施例一中的情况1和情况2中的方式向DU反馈小区对应的系统信息，在此不再赘述。
在实施例一和实施例二中，终端在获取N个小区中的部分小区对应的系统信息之后，还需要向其他DU请求N个小区中的其他小区对应的系统信息，从而使得系统信息获取的时延较长。为了降低系统信息获取的时延，DU可以在广播的小区信息中增加CU标识和/或DU标识，例如，在MIB或者SIB1中增加CU标识和/或DU标识，终端据此判别多个小区是否属于同一个CU或DU，进而可以同步向每个CU连接的一个DU发送获取小区对应的系统信息的请求，从而降低系统信息的获取时延。
实施例一和实施例二中以提供的方法应用于NR通信系统或5G通信网络中为例进行说明。但是需要说明的是，实施例一和实施例二提供的方法也可以应用于基站为分离式架构的其他网络中。
实施例三
适用场景：接入网网元为接入网设备。
参见图10，实施例三提供的方法包括：
1001、终端向接入网设备发送第一请求，第一请求用于请求N个小区对应的系统信息。相应的，接入网设备从终端接收第一请求。
可选的，终端处于空闲态，第一请求为MAC CE信令或随机接入过程中的消息1或随机接入过程中的消息3；或者，终端处于连接态，第一请求为RRC信令或MAC CE信令。关于该可选的方法的相关描述参见上文，在此不再赘述。
关于第一请求的描述可参见图2的实施例中的相关描述，此处不再赘述。
1002、接入网设备根据第一请求向终端发送第一响应，第一响应包括M个小区对应的系统信息，M个小区至少包括N个小区中的部分小区。相应的，终端从接入网设备接收第一响应，从而根据第一响应获取M个小区对应的系统信息。
关于第一响应的描述可参见图2的实施例中的相关描述，此处不再赘述。
其中，在终端处于空闲态的情况下，接入网设备可以通过广播的方式或MAC CE信令向终端发送第一响应。在终端处于连接态的情况下，接入网设备可以通过广播的方式或RRC信令或MAC CE信令向终端发送第一响应。
现有技术中，终端一次只能请求一个小区对应的系统信息，与现有的获取小区对应的系统信息的方式相比，本申请实施例提供的方法中，终端可以一次性获取多个小区对应的系统信息，提高信令交互效率，降低空口信令开销。
可选的，在步骤1002之前，该方法还包括：接入网设备根据第一请求本地获取一个或多个小区对应的系统信息。
可选的，在步骤1002之前，该方法还包括：
11)接入网设备根据第一请求向其他接入网设备发送第五请求，第五请求用于请求一个或多个小区对应的系统信息。相应的，其他接入网设备从接入网设备接收第五请求。
12)其他接入网设备根据第五请求向接入网设备发送第五响应，第五响应包括一个或多个小区对应的系统信息。相应的，接入网设备从其他接入网设备接收第五响应。
其中，第五请求中包含的信息与上述第二请求中包含的信息类似，第五响应中包含的信息与上述第二响应中包含的信息类似。第五请求和第五响应中包含的信息的格式可参见上述第二请求和第二响应中包含的信息的格式，不再赘述。
步骤1002在具体实现时，在不同的情况下，接入网设备执行的动作可以不同，以下基于情况5和情况6分别进行描述。
情况5、终端请求的为N个小区对应的系统信息，接入网设备在向终端反馈小区对应的系统信息时，仅反馈终端请求的小区对应的系统信息。
若接入网设备中有N个小区中的部分或全部小区对应的系统信息，则接入网设备可以将N个小区中的部分或全部小区对应的系统信息发送给终端。其中，接入网设备中的任意一个小区对应的系统信息可以是接入网设备生成的，也可以是接入网设备从其他接入网设备获取并存储在接入网设备中的。
若接入网设备中有N个小区中的N1(N1为大于0的整数)个小区对应的系统信息，则接入网设备可以向其他接入网设备请求N2个小区对应的系统信息，并将请求到的小区对应的系统信息和接入网设备中的N1个小区对应的系统信息发送给终端。其中，N2个小区为N个小区中的除N1个小区之外的小区，请求到的小区对应的系统信息和接入网设备中的N1个小区对应的系统信息即M个小区对应的系统信息，M个小区对应的系统信息可以一次或多次发送给终端。例如，接入网设备先将获取到的N1个小区对应的系统信息发送给终端，再将从其他接入网设备请求到的小区对应的系统信息发送给终端。
若接入网设备中没有N个小区中的任意一个小区对应的系统信息，则接入网设备可以向其他接入网设备请求N个小区对应的系统信息，并将请求到的小区对应的系统信息发送给终端。其中，请求到的小区对应的系统信息即M个小区对应的系统信息。
在情况5中，若M小于N，终端可以向其他接入网设备继续请求N个小区中的除M个小区之外的小区对应的系统信息，直至获取到N个小区对应的系统信息。
情况6、终端请求的为N个小区对应的系统信息，接入网设备既反馈终端请求的小区对应的系统信息，还反馈终端未请求的小区对应的系统信息。
该情况下，假设S个小区对应的系统信息为终端未请求但接入网设备发送的小区对应 的系统信息。
若接入网设备中有N+S个小区中的部分或全部小区对应的系统信息，则接入网设备可以将N+S个小区中的部分或全部小区对应的系统信息发送给终端。其中，N+S个小区即N个小区和S个小区之和。
若接入网设备中有N+S个小区中的X1(X1为大于0的整数)个小区对应的系统信息，则接入网设备可以向其他接入网设备请求X2个小区对应的系统信息，并将请求到的小区对应的系统信息和接入网设备中的X1个小区对应的系统信息发送给终端。其中，X2个小区为N+S个小区中的除X1个小区之外的小区，请求到的小区对应的系统信息和接入网设备中的X1个小区对应的系统信息即M个小区对应的系统信息，M个小区对应的系统信息可以一次或多次发送给终端。例如，接入网设备先将获取到的X1个小区对应的系统信息发送给终端，再将从其他接入网设备请求到的小区对应的系统信息发送给终端。
若接入网设备中没有N+S个小区中的任意一个小区对应的系统信息，则接入网设备可以向其他接入网设备请求N+S个小区对应的系统信息，并将请求到的小区对应的系统信息发送给终端。其中，请求到的小区对应的系统信息即M个小区对应的系统信息。
在M个小区未包含N个小区的情况下，终端可以向其他接入网设备继续请求N个小区中的除收到的小区之外的小区对应的系统信息。
为了使得上述实施例的实现流程更加的清楚，以下通过实施例1至实施例4对上述实施例提供的方法的实现流程作示例性说明。
实施例1和实施例2基于图11所示的架构对上述实施例提供的方法的实现流程作示例性说明。在图11中，CU1连接3个DU，分别为DU1、DU2和DU3，3个DU分别覆盖的小区可参见表2。
表2
DU1 DU2 DU3
小区1，小区2，小区3 小区4 小区5，小区6
实施例1(DU无法解析第一请求中包含的信息)
假设终端需要获取小区1至小区5对应的系统信息，参见图12，实施例1提供的方法包括：
1201、终端获取5个小区的CGI和5个小区中的每个小区对应的系统信息的类型。
其中，5个小区为小区1至小区5。
1202、终端根据5个小区的CGI生成小区唯一标识列表，根据5个小区中的每个小区对应的系统信息的类型生成系统信息类型标识列表。
小区唯一标识列表中包含5个小区的CGI。系统信息类型标识列表中包含5个小区中的每个小区对应的系统信息的类型。
1203、终端根据小区唯一标识列表和系统信息类型标识列表向DU1发送第一请求。相应的，DU1从终端接收第一请求。
其中，第一请求中包括小区唯一标识列表和系统信息类型标识列表。
在实施例1中，DU无法解析第一请求中包含的信息。在终端处于空闲态的情况下，第一请求可以为随机接入过程中的消息3。在终端处于连接态的情况下，第一请求可以为RRC信令。
需要说明的是，步骤1203在具体实现时，终端可以向DU1、DU2和DU3中的任意一个DU发送第一请求，实施例1中以终端向DU1发送第一请求为例进行说明。
1204、DU1根据第一请求向CU1发送第二请求。相应的，CU1从DU1接收第二请求。
步骤1204在具体实现时，由于DU无法解析第一请求中包含的信息，因此，DU1可以直接将第一请求中包含的信息携带在第二请求中向CU1发送。第二请求中包括小区唯一标识列表和系统信息类型标识列表。
1205、CU1根据第二请求向DU1发送第二响应。相应的，DU1从CU1接收第二响应。
其中，第二响应中包括小区唯一标识列表和系统信息列表，系统信息列表中包括5个小区中的部分或全部小区对应的系统信息。
1206、DU1根据第二响应向终端发送第一响应。相应的，终端从DU1接收第一响应。
其中，第一响应中包括小区唯一标识列表和系统信息列表，系统信息列表中包括5个小区中的部分或全部小区对应的系统信息。
1207、终端根据第一响应确定5个小区中的部分或全部小区对应的系统信息。
在步骤1207之后，终端可以判断是否获取到5个小区中的全部小区对应的系统信息。若是，则结束，若否，终端可以向DU1之外的其他DU发送用于请求5个小区中的其他(即未获取到的)小区对应的系统信息。例如，若终端通过第一请求获取到5个小区中的小区1至小区3对应的系统信息，则终端可以再向DU2发送用于请求小区4和小区5对应的系统信息的请求，直至获取到5个小区对应的系统信息为止。
实施例2(DU可以解析第一请求中包含的信息)
假设终端需要获取小区1至小区5对应的系统信息，DU1中存储有小区1和小区2对应的系统信息，参见图13，实施例2提供的方法包括：
1301、终端获取5个小区的CGI和5个小区中的每个小区对应的系统信息的类型。
其中，5个小区为小区1至小区5。
1302、终端根据5个小区的CGI生成小区唯一标识列表1，根据5个小区中的每个小区对应的系统信息的类型生成系统信息类型标识列表1。
小区唯一标识列表1中包含5个小区的CGI。系统信息类型标识列表1中包含5个小区中的每个小区对应的系统信息的类型。
1303、终端根据小区唯一标识列表1和系统信息类型标识列表1向DU1发送第一请求。相应的，DU1从终端接收第一请求。
其中，第一请求用于请求小区1至小区5对应的系统信息，第一请求中包括小区唯一标识列表1和系统信息类型标识列表1。
在实施例2中，DU可以解析第一请求中包含的信息。在终端处于空闲态的情况下，第一请求为MAC CE信令或随机接入过程中的消息1。在终端处于连接态的情况下，第一请求为MAC CE信令。
需要说明的是，步骤1303在具体实现时，终端可以向DU1、DU2和DU3中的任意一个DU发送第一请求，实施例2中以终端向DU1发送第一请求为例进行说明。
1304、DU1根据第一请求本地获取小区1和小区2对应的系统信息。
1305、DU1根据第一请求向CU1发送第六请求。相应的，CU1从DU1接收第六请求。
其中，第六请求用于请求小区3至小区5对应的系统信息。第六请求包括小区唯一标 识列表2和系统信息类型标识列表2。小区唯一标识列表2包括小区3至小区5的标识，系统信息类型标识列表2包括小区3至小区5对应的系统信息的类型标识。
1306、CU1根据第六请求向DU1发送第六响应。相应的，DU1从CU1接收第六响应。
其中，第六响应中包括小区唯一标识列表3和系统信息列表3。小区唯一标识列表3包括小区3至小区5中的部分或全部小区的标识。系统信息列表3包括小区3至小区5中的部分或全部小区对应的系统信息。
1307、DU1根据第六响应和本地获取的小区1和小区2对应的系统信息向终端发送第一响应。相应的，终端从DU1接收第一响应。
其中，第一响应中包括小区唯一标识列表4和系统信息列表4。小区唯一标识列表4中包括小区1和小区2的标识，还包括DU1从CU1获取到的系统信息对应的小区的标识。系统信息列表4中包括小区1和小区2对应的系统信息，还包括DU1从CU1获取到的小区对应的系统信息。
1308、终端根据第一响应确定5个小区中的部分或全部小区对应的系统信息。
在步骤1308之后，终端可以判断是否获取到5个小区中的全部小区对应的系统信息。若是，则结束，若否，终端可以向DU1之外的其他DU发送用于请求5个小区中的其他(即未获取到的)小区对应的系统信息。例如，若终端通过第一请求获取到5个小区中的小区1至小区3对应的系统信息，则终端可以再向DU2发送用于请求小区4和小区5对应的系统信息的请求，直至获取到5个小区对应的系统信息为止。
实施例3和实施例4基于图14所示的架构对上述实施例提供的方法的实现流程作示例性说明。在图14中，CU1连接DU1和DU2，CU2连接DU3和DU4，4个DU分别覆盖的小区可参见表3。
表3
DU1 DU2 DU3 DU4
小区1，小区2 小区3 小区4，小区5 小区6，小区7
实施例3(DU无法解析第一请求中包含的信息)
参见图15，假设终端需要获取小区1至小区5对应的系统信息，实施例3提供的方法包括以下步骤1501至步骤1508。
1501、CU1通过Xn接口获取CU2下的小区的CGI和每个小区对应的系统信息。
在步骤1501之后，CU1可以将获取到的CU2下的小区的CGI和每个小区对应的系统信息存储在本地。同样的，CU2也可以通过Xn接口获取CU1下的小区的CGI和每个小区对应的系统信息，并存储在本地。
1502-1508、步骤1502至步骤1508分别与步骤1201至步骤1207相同。其中，在实施例3中，终端可以向DU1、DU2、DU3和DU4中的任意一个DU发送第一请求，实施例3中以终端向DU1发送第一请求为例进行说明。
实施例4(DU可以解析第一请求中包含的信息)
假设终端需要获取小区1至小区5对应的系统信息，DU1中存储有小区1和小区2对应的系统信息。参见图16，实施例4提供的方法包括步骤1601至步骤1609。其中，步骤1601与步骤1501相同，步骤1602至步骤1609分别与步骤1301至步骤1308相同。其中，在实施例4中，终端可以向DU1、DU2、DU3和DU4中的任意一个DU发送第一请求， 实施例4中以终端向DU1发送第一请求为例进行说明。
在实施例3和实施例4中，需要说明的是，CU1和CU2之间也可以不提前获取对方的小区对应的系统信息，而是在终端请求时再通过交互获取小区对应的系统信息，本申请实施例对此不作具体限定。
上述主要从各个网元之间交互的角度对本申请实施例的方案进行了介绍。可以理解的是，各个网元，例如，DU、CU、接入网设备和终端为了实现上述功能，其包含了执行各个功能相应的硬件结构和/或软件模块。本领域技术人员应该很容易意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，本申请能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
本申请实施例可以根据上述方法示例对DU、CU、接入网设备和终端进行功能单元的划分，例如，可以对应各个功能划分各个功能单元，也可以将两个或两个以上的功能集成在一个处理单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。需要说明的是，本申请实施例中对单元的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式。
在采用集成的单元的情况下，图17示出了上述实施例中所涉及的获取系统信息的装置(记为获取系统信息的装置170)的一种可能的结构示意图，该获取系统信息的装置170包括处理单元1701和通信单元1702，还可以包括存储单元1703。图17所示的结构示意图可以用于示意上述实施例中所涉及的终端、DU、CU或接入网设备的结构。
当图17所示的结构示意图用于示意上述实施例中所涉及的终端的结构时，处理单元1701用于对终端的动作进行控制管理。例如，处理单元1701用于支持终端执行图2中的201至202，图8中的801至802，图9中的901至902，图10中的1001至1002，图12中的1201、1202、1203、1206和1207，图13中的1301、1302、1303、1307和1308，图15中的1502、1503、1504、1507和1508，图16中的1602、1603、1604、1608和1609，和/或本申请实施例中所描述的其他过程中的终端执行的动作。处理单元1701可以通过通信单元1702与其他网络实体通信，例如，与图2中示出的接入网网元之间的通信。存储单元1703用于存储终端的程序代码和数据。
当图17所示的结构示意图用于示意上述实施例中所涉及的终端的结构时，获取系统信息的装置170可以是终端，也可以是终端内的芯片。
当图17所示的结构示意图用于示意上述实施例中所涉及的DU的结构时，处理单元1701用于对DU的动作进行控制管理。例如，处理单元1701用于支持DU执行图2中的201至202(此时图2中的接入网网元为DU)，图8中的801至804(此时DU为图8中的第一DU)，图9中的901至902，图12中的1203至1206(此时DU为图12中的DU1)，图13中的1303至1307(此时DU为图13中的DU1)，图15中的1504至1507(此时DU为图15中的DU1)，图16中的1604至1608(此时DU为图16中的DU1)，和/或本申请实施例中所描述的其他过程中的DU执行的动作。处理单元1701可以通过通信单元1702与其他网络实体通信，例如，与图8中示出的终端之间的通信。存储单元1703用于存储DU的程序代码和数据。
当图17所示的结构示意图用于示意上述实施例中所涉及的DU的结构时，获取系统信息的装置170可以是DU，也可以是DU内的芯片。
当图17所示的结构示意图用于示意上述实施例中所涉及的CU的结构时，处理单元1701用于对CU的动作进行控制管理。例如，处理单元1701用于支持CU执行图8中的802至803(此时CU为图8中的第一CU)，图12中的1204至1205(此时CU为图12中的CU1)，图13中的1305至1306(此时CU为图13中的CU1)，图15中的1501(此时CU为图15中的CU1或CU2)，图15中的1505和1506(此时CU为图15中的CU1)，图16中的1601(此时CU为图16中的CU1或CU2)，图16中的1606至1607(此时CU为图16中的CU1)，和/或本申请实施例中所描述的其他过程中的CU执行的动作。处理单元1701可以通过通信单元1702与其他网络实体通信，例如，与图8中示出的第一DU之间的通信。存储单元1703用于存储CU的程序代码和数据。
当图17所示的结构示意图用于示意上述实施例中所涉及的CU的结构时，获取系统信息的装置170可以是CU，也可以是CU内的芯片。
当图17所示的结构示意图用于示意上述实施例中所涉及的接入网设备的结构时，处理单元1701用于对接入网设备的动作进行控制管理。例如，处理单元1701用于支持接入网设备执行图2中的201至202(此时图2中的接入网网元为接入网设备)，图10中的1001至1002，和/或本申请实施例中所描述的其他过程中的接入网设备执行的动作。处理单元1701可以通过通信单元1702与其他网络实体通信，例如，与图10中示出的终端之间的通信。存储单元1703用于存储接入网设备的程序代码和数据。
当图17所示的结构示意图用于示意上述实施例中所涉及的接入网设备的结构时，获取系统信息的装置170可以是接入网设备，也可以是接入网设备内的芯片。
其中，当获取系统信息的装置170为终端、DU、CU或接入网设备时，处理单元1701可以是处理器或控制器，通信单元1702可以是通信接口、收发器、收发机、收发电路、收发装置等。其中，通信接口是统称，可以包括一个或多个接口。存储单元1703可以是存储器。当获取系统信息的装置170为终端、DU、CU或接入网设备内的芯片时，处理单元1701可以是处理器或控制器，通信单元1702可以是输入接口和/或输出接口、管脚或电路等。存储单元1703可以是该芯片内的存储单元(例如，寄存器、缓存等)，也可以是终端、DU、CU或接入网设备内的位于该芯片外部的存储单元(例如，只读存储器、随机存取存储器等)。
其中，通信单元也可以称为收发单元。获取系统信息的装置170中的具有收发功能的天线和控制电路可以视为获取系统信息的装置170的通信单元1702，具有处理功能的处理器可以视为获取系统信息的装置170的处理单元1701。可选的，通信单元1702中用于实现接收功能的器件可以视为接收单元，接收单元用于执行本申请实施例中的接收的步骤，接收单元可以为接收机、接收器、接收电路等。通信单元1702中用于实现发送功能的器件可以视为发送单元，发送单元用于执行本申请实施例中的发送的步骤，发送单元可以为发送机、发送器、发送电路等。
图17中的集成的单元如果以软件功能模块的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请实施例的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产 品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)或处理器(processor)执行本申请各个实施例所述方法的全部或部分步骤。存储计算机软件产品的存储介质包括：U盘、移动硬盘、只读存储器(read-only memory，简称ROM)、随机存取存储器(random access memory，简称RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
图17中的单元也可以称为模块，例如，处理单元可以称为处理模块。
本申请实施例还提供了一种获取系统信息的装置(记为获取系统信息的装置180)的硬件结构示意图，参见图18或图19，该获取系统信息的装置180包括处理器1801，可选的，还包括与处理器1801连接的存储器1802。
处理器1801可以是一个通用中央处理器(central processing unit，简称CPU)、微处理器、特定应用集成电路(application-specific integrated circuit，简称ASIC)，或者一个或多个用于控制本申请方案程序执行的集成电路。处理器1801也可以包括多个CPU，并且处理器1801可以是一个单核(single-CPU)处理器，也可以是多核(multi-CPU)处理器。这里的处理器可以指一个或多个设备、电路或用于处理数据(例如计算机程序指令)的处理核。
存储器1802可以是ROM或可存储静态信息和指令的其他类型的静态存储设备、RAM或者可存储信息和指令的其他类型的动态存储设备，也可以是电可擦可编程只读存储器(electrically erasable programmable read-only memory，简称EEPROM)、只读光盘(compact disc read-only memory，简称CD-ROM)或其他光盘存储、光碟存储(包括压缩光碟、激光碟、光碟、数字通用光碟、蓝光光碟等)、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质，本申请实施例对此不作任何限制。存储器1802可以是独立存在，也可以和处理器1801集成在一起。其中，存储器1802中可以包含计算机程序代码。处理器1801用于执行存储器1802中存储的计算机程序代码，从而实现本申请实施例提供的方法。
在第一种可能的实现方式中，参见图18，获取系统信息的装置180还包括收发器1803。处理器1801、存储器1802和收发器1803通过总线相连接。收发器1803用于与其他设备或通信网络通信。可选的，收发器1803可以包括发射机和接收机。收发器1803中用于实现接收功能的器件可以视为接收机，接收机用于执行本申请实施例中的接收的步骤。收发器1803中用于实现发送功能的器件可以视为发射机，发射机用于执行本申请实施例中的发送的步骤。
基于第一种可能的实现方式，图18所示的结构示意图可以用于示意上述实施例中所涉及的DU、CU、接入网设备或终端的结构。
当图18所示的结构示意图用于示意上述实施例中所涉及的终端的结构时，处理器1801用于对终端的动作进行控制管理。例如，处理器1801用于支持终端执行图2中的201至202，图8中的801至802，图9中的901至902，图10中的1001至1002，图12中的1201、1202、1203、1206和1207，图13中的1301、1302、1303、1307和1308，图15中的1502、1503、1504、1507和1508，图16中的1602、1603、1604、1608和1609，和/或本申请实施例中所描述的其他过程中的终端执行的动作。处理器1801可以通过收发器1803与其他网络实体通信，例如，与图2中示出的接入网网元之间的通信。存储器1802用于存储终 端的程序代码和数据。
当图18所示的结构示意图用于示意上述实施例中所涉及的DU的结构时，处理器1801用于对DU的动作进行控制管理。例如，处理器1801用于支持DU执行图2中的201至202(此时图2中的接入网网元为DU)，图8中的801至804(此时DU为图8中的第一DU)，图9中的901至902，图12中的1203至1206(此时DU为图12中的DU1)，图13中的1303至1307(此时DU为图13中的DU1)，图15中的1504至1507(此时DU为图15中的DU1)，图16中的1604至1608(此时DU为图16中的DU1)，和/或本申请实施例中所描述的其他过程中的DU执行的动作。处理器1801可以通过收发器1803与其他网络实体通信，例如，与图8中示出的终端之间的通信。存储器1802用于存储DU的程序代码和数据。
当图18所示的结构示意图用于示意上述实施例中所涉及的CU的结构时，处理器1801用于对CU的动作进行控制管理。例如，处理器1801用于支持CU执行图8中的802至803(此时CU为图8中的第一CU)，图12中的1204至1205(此时CU为图12中的CU1)，图13中的1305至1306(此时CU为图13中的CU1)，图15中的1501(此时CU为图15中的CU1或CU2)，图15中的1505和1506(此时CU为图15中的CU1)，图16中的1601(此时CU为图16中的CU1或CU2)，图16中的1606至1607(此时CU为图16中的CU1)，和/或本申请实施例中所描述的其他过程中的CU执行的动作。处理器1801可以通过收发器1803与其他网络实体通信，例如，与图8中示出的第一DU之间的通信。存储器1802用于存储CU的程序代码和数据。
当图18所示的结构示意图用于示意上述实施例中所涉及的接入网设备的结构时，处理器1801用于对接入网设备的动作进行控制管理。例如，处理器1801用于支持接入网设备执行图2中的201至202(此时图2中的接入网网元为接入网设备)，图10中的1001至1002，和/或本申请实施例中所描述的其他过程中的接入网设备执行的动作。处理器1801可以通过收发器1803与其他网络实体通信，例如，与图10中示出的终端之间的通信。存储器1802用于存储接入网设备的程序代码和数据。
在第二种可能的实现方式中，处理器1801包括逻辑电路以及输入接口和/或输出接口。其中，输出接口用于执行相应方法中的发送的动作，输入接口用于执行相应方法中的接收的动作。
基于第二种可能的实现方式，参见图19，图19所示的结构示意图可以用于示意上述实施例中所涉及的DU、CU、接入网设备或终端的结构。
当图19所示的结构示意图用于示意上述实施例中所涉及的终端的结构时，处理器1801用于对终端的动作进行控制管理。例如，处理器1801用于支持终端执行图2中的201至202，图8中的801至802，图9中的901至902，图10中的1001至1002，图12中的1201、1202、1203、1206和1207，图13中的1301、1302、1303、1307和1308，图15中的1502、1503、1504、1507和1508，图16中的1602、1603、1604、1608和1609，和/或本申请实施例中所描述的其他过程中的终端执行的动作。处理器1801可以通过输入接口和/或输出接口与其他网络实体通信，例如，与图2中示出的接入网网元之间的通信。存储器1802用于存储终端的程序代码和数据。
当图19所示的结构示意图用于示意上述实施例中所涉及的DU的结构时，处理器1801 用于对DU的动作进行控制管理。例如，处理器1801用于支持DU执行图2中的201至202(此时图2中的接入网网元为DU)，图8中的801至804(此时DU为图8中的第一DU)，图9中的901至902，图12中的1203至1206(此时DU为图12中的DU1)，图13中的1303至1307(此时DU为图13中的DU1)，图15中的1504至1507(此时DU为图15中的DU1)，图16中的1604至1608(此时DU为图16中的DU1)，和/或本申请实施例中所描述的其他过程中的DU执行的动作。处理器1801可以通过输入接口和/或输出接口与其他网络实体通信，例如，与图8中示出的终端之间的通信。存储器1802用于存储DU的程序代码和数据。
当图19所示的结构示意图用于示意上述实施例中所涉及的CU的结构时，处理器1801用于对CU的动作进行控制管理。例如，处理器1801用于支持CU执行图8中的802至803(此时CU为图8中的第一CU)，图12中的1204至1205(此时CU为图12中的CU1)，图13中的1305至1306(此时CU为图13中的CU1)，图15中的1501(此时CU为图15中的CU1或CU2)，图15中的1505和1506(此时CU为图15中的CU1)，图16中的1601(此时CU为图16中的CU1或CU2)，图16中的1606至1607(此时CU为图16中的CU1)，和/或本申请实施例中所描述的其他过程中的CU执行的动作。处理器1801可以通过输入接口和/或输出接口与其他网络实体通信，例如，与图8中示出的第一DU之间的通信。存储器1802用于存储CU的程序代码和数据。
当图19所示的结构示意图用于示意上述实施例中所涉及的接入网设备的结构时，处理器1801用于对接入网设备的动作进行控制管理。例如，处理器1801用于支持接入网设备执行图2中的201至202(此时图2中的接入网网元为接入网设备)，图10中的1001至1002，和/或本申请实施例中所描述的其他过程中的接入网设备执行的动作。处理器1801可以通过输入接口和/或输出接口与其他网络实体通信，例如，与图10中示出的终端之间的通信。存储器1802用于存储接入网设备的程序代码和数据。
另外，本申请实施例还提供了一种终端(记为终端200)的硬件结构示意图，具体可参见图20。
图20为终端200的硬件结构示意图。为了便于说明，图20仅示出了终端的主要部件。如图20所示，终端200包括处理器、存储器、控制电路、天线以及输入输出装置。
处理器主要用于对通信协议以及通信数据进行处理，以及对整个终端进行控制，执行软件程序，处理软件程序的数据，例如，用于控制终端执行图2中的201至202，图8中的801至802，图9中的901至902，图10中的1001至1002，图12中的1201、1202、1203、1206和1207，图13中的1301、1302、1303、1307和1308，图15中的1502、1503、1504、1507和1508，图16中的1602、1603、1604、1608和1609，和/或本申请实施例中所描述的其他过程中的终端执行的动作。存储器主要用于存储软件程序和数据。控制电路(也可以称为射频电路)主要用于基带信号与射频信号的转换以及对射频信号的处理。控制电路和天线一起也可以叫做收发器，主要用于收发电磁波形式的射频信号。输入输出装置，例如触摸屏、显示屏，键盘等主要用于接收用户输入的数据以及对用户输出数据。
当终端开机后，处理器可以读取存储器中的软件程序，解释并执行软件程序的指令，处理软件程序的数据。当需要通过天线发送数据时，处理器对待发送的数据进行基带处理后，输出基带信号至控制电路中的控制电路，控制电路将基带信号进行射频处理后将射频 信号通过天线以电磁波的形式向外发送。当有数据发送到终端时，控制电路通过天线接收到射频信号，将射频信号转换为基带信号，并将基带信号输出至处理器，处理器将基带信号转换为数据并对该数据进行处理。
本领域技术人员可以理解，为了便于说明，图20仅示出了一个存储器和处理器。在实际的终端中，可以存在多个处理器和存储器。存储器也可以称为存储介质或者存储设备等，本申请实施例对此不做限制。
作为一种可选的实现方式，处理器可以包括基带处理器和中央处理器，基带处理器主要用于对通信协议以及通信数据进行处理，中央处理器主要用于对整个终端进行控制，执行软件程序，处理软件程序的数据。图20中的处理器集成了基带处理器和中央处理器的功能，本领域技术人员可以理解，基带处理器和中央处理器也可以是各自独立的处理器，通过总线等技术互联。本领域技术人员可以理解，终端可以包括多个基带处理器以适应不同的网络制式，终端可以包括多个中央处理器以增强其处理能力，终端的各个部件可以通过各种总线连接。该基带处理器也可以表述为基带处理电路或者基带处理芯片。该中央处理器也可以表述为中央处理电路或者中央处理芯片。对通信协议以及通信数据进行处理的功能可以内置在处理器中，也可以以软件程序的形式存储在存储器中，由处理器执行软件程序以实现基带处理功能。
本申请实施例还提供了一种计算机可读存储介质，包括指令，当其在计算机上运行时，使得计算机执行上述任一方法。
本申请实施例还提供了一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行上述任一方法。
本申请实施例还提供了一种通信系统，包括：上述网络设备和终端。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件程序实现时，可以全部或部分地以计算机程序产品的形式来实现。该计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行计算机程序指令时，全部或部分地产生按照本申请实施例所述的流程或功能。计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，计算机指令可以从一个网站站点、计算机、服务器或者数据中心通过有线(例如同轴电缆、光纤、数字用户线(digital subscriber line，简称DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可以用介质集成的服务器、数据中心等数据存储设备。可用介质可以是磁性介质(例如，软盘、硬盘、磁带)，光介质(例如，DVD)、或者半导体介质(例如固态硬盘(solid state disk，简称SSD))等。
尽管在此结合各实施例对本申请进行了描述，然而，在实施所要求保护的本申请过程中，本领域技术人员通过查看附图、公开内容、以及所附权利要求书，可理解并实现公开实施例的其他变化。在权利要求中，“包括”(comprising)一词不排除其他组成部分或步骤，“一”或“一个”不排除多个的情况。单个处理器或其他单元可以实现权利要求中列举的若干项功能。相互不同的从属权利要求中记载了某些措施，但这并不表示这些措施不能组合起来产生良好的效果。
尽管结合具体特征及其实施例对本申请进行了描述，显而易见的，在不脱离本申请的精神和范围的情况下，可对其进行各种修改和组合。相应地，本说明书和附图仅仅是所附权利要求所界定的本申请的示例性说明，且视为已覆盖本申请范围内的任意和所有修改、变化、组合或等同物。显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的精神和范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (32)

  1. 一种获取系统信息的方法，其特征在于，包括：
    终端向接入网网元发送第一请求，所述第一请求用于请求N个小区对应的系统信息，N为大于1的整数；
    所述终端从所述接入网网元接收第一响应，所述第一响应包括M个小区对应的系统信息，所述M个小区至少包括所述N个小区中的部分小区，M为大于0的整数。
  2. 根据权利要求1所述的方法，其特征在于，所述第一请求包括用于指示所述N个小区的信息和用于指示所述N个小区中每个小区对应的系统信息的类型的信息；或者，所述第一请求包括用于指示所述N个小区的信息。
  3. 根据权利要求1或2所述的方法，其特征在于，所述第一响应包括用于指示所述M个小区的信息和所述M个小区中每个小区对应的系统信息；或者，所述第一响应包括用于指示所述M个小区的信息、用于指示所述M个小区中每个小区对应的系统信息的类型的信息和所述M个小区中每个小区对应的系统信息。
  4. 根据权利要求1-3任一项所述的方法，其特征在于，所述接入网网元为接入网设备，或者，所述接入网网元为分布式单元DU。
  5. 根据权利要求1-4任一项所述的方法，其特征在于，所述终端处于空闲态，所述第一请求为介质接入控制控制元素MAC CE信令或随机接入过程中的消息1或随机接入过程中的消息3；或者，所述终端处于连接态，所述第一请求为无线资源控制RRC信令或MAC CE信令。
  6. 一种获取系统信息的方法，其特征在于，包括：
    分布式单元DU从终端接收第一请求，所述第一请求用于请求N个小区对应的系统信息，N为大于1的整数；
    所述DU根据所述第一请求向第一集中式单元CU发送第二请求，所述第二请求用于为所述终端请求所述N个小区对应的系统信息；
    所述DU从所述第一CU接收第二响应，所述第二响应包括M个小区对应的系统信息，所述M个小区至少包括所述N个小区中的部分小区，M为大于0的整数；
    所述DU向所述终端发送第一响应，所述第一响应包括所述M个小区对应的系统信息。
  7. 根据权利要求6所述的方法，其特征在于，所述第一请求和所述第二请求包括：用于指示所述N个小区的信息和用于指示所述N个小区中每个小区对应的系统信息的类型的信息；或者，所述第一请求和所述第二请求包括：用于指示所述N个小区的信息。
  8. 根据权利要求6或7所述的方法，其特征在于，所述第一响应包括：用于指示所述M个小区的信息和所述M个小区中每个小区对应的系统信息；或者，用于指示所述M个小区的信息、用于指示所述M个小区中每个小区对应的系统信息的类型的信息和所述M个小区中每个小区对应的系统信息；所述第二响应包括：用于指示所述M个小区的信息和所述M个小区中每个小区对应的系统信息；或者，所述第二响应包括用于指示所述M个小区的信息和用于指示所述M个小区中每个小区对应的系统信息的类型的信息；或者，所述第二响应包括用于指示所述M个小区的信息、用于指示 所述M个小区中每个小区对应的系统信息的类型的信息和所述M个小区中每个小区对应的系统信息。
  9. 根据权利要求6-8任一项所述的方法，其特征在于，所述终端处于空闲态，所述第一请求为随机接入过程中的消息3；或者，所述终端处于连接态，所述第一请求为无线资源控制RRC信令。
  10. 一种获取系统信息的方法，其特征在于，包括：
    第一集中式单元CU从分布式单元DU接收第二请求，所述第二请求用于为终端请求N个小区对应的系统信息，N为大于1的整数；
    所述第一CU根据所述第二请求向所述DU发送第二响应，所述第二响应包括M个小区对应的系统信息，所述M个小区至少包括所述N个小区中的部分小区，M为大于0的整数。
  11. 根据权利要求10所述的方法，其特征在于，所述第二请求包括用于指示所述N个小区的信息和用于指示所述N个小区中每个小区对应的系统信息的类型的信息；或者，所述第二请求包括用于指示所述N个小区的信息。
  12. 根据权利要求10或11所述的方法，其特征在于，所述第二响应包括用于指示所述M个小区的信息和所述M个小区中每个小区对应的系统信息；或者，所述第二响应包括用于指示所述M个小区的信息和用于指示所述M个小区中每个小区对应的系统信息的类型的信息；或者，所述第二响应包括用于指示所述M个小区的信息、用于指示所述M个小区中每个小区对应的系统信息的类型的信息和所述M个小区中每个小区对应的系统信息。
  13. 根据权利要求10-12任一项所述的方法，其特征在于，在所述第一CU根据所述第二请求向所述DU发送第二响应之前，所述方法还包括：
    所述第一CU根据所述第二请求本地获取一个或多个小区对应的系统信息。
  14. 根据权利要求10-13任一项所述的方法，其特征在于，在所述第一CU根据所述第二请求向所述DU发送第二响应之前，所述方法还包括：
    所述第一CU根据所述第二请求向一个或多个DU发送第三请求，所述第三请求用于请求一个或多个小区对应的系统信息；
    所述第一CU从所述一个或多个DU接收第三响应，所述第三响应包括一个或多个小区对应的系统信息。
  15. 根据权利要求10-14任一项所述的方法，其特征在于，在所述第一CU根据所述第二请求向所述DU发送第二响应之前，所述方法还包括：
    所述第一CU根据所述第二请求向第二CU发送第四请求，所述第四请求用于请求一个或多个小区对应的系统信息；
    所述第一CU从所述第二CU接收第四响应，所述第四响应包括一个或多个小区对应的系统信息。
  16. 一种获取系统信息的装置，其特征在于，包括：通信单元和处理单元；
    所述处理单元，用于通过所述通信单元向接入网网元发送第一请求，所述第一请求用于请求N个小区对应的系统信息，N为大于1的整数；
    所述处理单元，还用于通过所述通信单元从所述接入网网元接收第一响应，所述 第一响应包括M个小区对应的系统信息，所述M个小区至少包括所述N个小区中的部分小区，M为大于0的整数。
  17. 根据权利要求16所述的装置，其特征在于，所述第一请求包括用于指示所述N个小区的信息和用于指示所述N个小区中每个小区对应的系统信息的类型的信息；或者，所述第一请求包括用于指示所述N个小区的信息。
  18. 根据权利要求16或17所述的装置，其特征在于，所述第一响应包括用于指示所述M个小区的信息和所述M个小区中每个小区对应的系统信息；或者，所述第一响应包括用于指示所述M个小区的信息、用于指示所述M个小区中每个小区对应的系统信息的类型的信息和所述M个小区中每个小区对应的系统信息。
  19. 根据权利要求16-18任一项所述的装置，其特征在于，所述接入网网元为接入网设备，或者，所述接入网网元为分布式单元DU。
  20. 根据权利要求16-19任一项所述的装置，其特征在于，所述获取系统信息的装置处于空闲态，所述第一请求为介质接入控制控制元素MAC CE信令或随机接入过程中的消息1或随机接入过程中的消息3；或者，所述获取系统信息的装置处于连接态，所述第一请求为无线资源控制RRC信令或MAC CE信令。
  21. 一种获取系统信息的装置，其特征在于，包括：通信单元和处理单元；
    所述处理单元，用于通过所述通信单元从终端接收第一请求，所述第一请求用于请求N个小区对应的系统信息，N为大于1的整数；
    所述处理单元，还用于根据所述第一请求，通过所述通信单元向第一集中式单元CU发送第二请求，所述第二请求用于为所述终端请求所述N个小区对应的系统信息；
    所述处理单元，还用于通过所述通信单元从所述第一CU接收第二响应，所述第二响应包括M个小区对应的系统信息，所述M个小区至少包括所述N个小区中的部分小区，M为大于0的整数；
    所述处理单元，还用于通过所述通信单元向所述终端发送第一响应，所述第一响应包括所述M个小区对应的系统信息。
  22. 根据权利要求21所述的装置，其特征在于，所述第一请求和所述第二请求包括：用于指示所述N个小区的信息和用于指示所述N个小区中每个小区对应的系统信息的类型的信息；或者，所述第一请求和所述第二请求包括：用于指示所述N个小区的信息。
  23. 根据权利要求21或22所述的装置，其特征在于，所述第一响应包括：用于指示所述M个小区的信息和所述M个小区中每个小区对应的系统信息；或者，用于指示所述M个小区的信息、用于指示所述M个小区中每个小区对应的系统信息的类型的信息和所述M个小区中每个小区对应的系统信息；所述第二响应包括：用于指示所述M个小区的信息和所述M个小区中每个小区对应的系统信息；或者，所述第二响应包括用于指示所述M个小区的信息和用于指示所述M个小区中每个小区对应的系统信息的类型的信息；或者，所述第二响应包括用于指示所述M个小区的信息、用于指示所述M个小区中每个小区对应的系统信息的类型的信息和所述M个小区中每个小区对应的系统信息。
  24. 根据权利要求21-23任一项所述的装置，其特征在于，所述终端处于空闲态， 所述第一请求为随机接入过程中的消息3；或者，所述终端处于连接态，所述第一请求为无线资源控制RRC信令。
  25. 一种获取系统信息的装置，其特征在于，包括：通信单元和处理单元；
    所述处理单元，用于通过所述通信单元从分布式单元DU接收第二请求，所述第二请求用于为终端请求N个小区对应的系统信息，N为大于1的整数；
    所述处理单元，还用于根据所述第二请求，通过所述通信单元向所述DU发送第二响应，所述第二响应包括M个小区对应的系统信息，所述M个小区至少包括所述N个小区中的部分小区，M为大于0的整数。
  26. 根据权利要求25所述的装置，其特征在于，所述第二请求包括用于指示所述N个小区的信息和用于指示所述N个小区中每个小区对应的系统信息的类型的信息；或者，所述第二请求包括用于指示所述N个小区的信息。
  27. 根据权利要求25或26所述的装置，其特征在于，所述第二响应包括用于指示所述M个小区的信息和所述M个小区中每个小区对应的系统信息；或者，所述第二响应包括用于指示所述M个小区的信息和用于指示所述M个小区中每个小区对应的系统信息的类型的信息；或者，所述第二响应包括用于指示所述M个小区的信息、用于指示所述M个小区中每个小区对应的系统信息的类型的信息和所述M个小区中每个小区对应的系统信息。
  28. 根据权利要求25-27任一项所述的装置，其特征在于，
    所述处理单元，还用于根据所述第二请求本地获取一个或多个小区对应的系统信息。
  29. 根据权利要求25-28任一项所述的装置，其特征在于，
    所述处理单元，还用于根据所述第二请求，通过所述通信单元向一个或多个DU发送第三请求，所述第三请求用于请求一个或多个小区对应的系统信息；
    所述处理单元，还用于通过所述通信单元从所述一个或多个DU接收第三响应，所述第三响应包括一个或多个小区对应的系统信息。
  30. 根据权利要求25-29任一项所述的装置，其特征在于，
    所述处理单元，还用于根据所述第二请求，通过所述通信单元向第二集中式单元CU发送第四请求，所述第四请求用于请求一个或多个小区对应的系统信息；
    所述处理单元，还用于通过所述通信单元从所述第二CU接收第四响应，所述第四响应包括一个或多个小区对应的系统信息。
  31. 一种获取系统信息的装置，其特征在于，包括：处理器；
    所述处理器与存储器连接，所述存储器用于存储计算机执行指令，所述处理器执行所述存储器存储的所述计算机执行指令，以使所述获取系统信息的装置实现如权利要求1-5中的任一项所述的方法；或者，实现如权利要求6-9中的任一项所述的方法，或者，实现如权利要求10-15中的任一项所述的方法。
  32. 一种计算机可读存储介质，其特征在于，包括指令，当所述指令在计算机上运行时，使得所述计算机执行如权利要求1-5中的任一项所述的方法；或者，执行如权利要求6-9中的任一项所述的方法，或者，执行如权利要求10-15中的任一项所述的方法。
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