WO2018227481A1 - Système et procédé de configuration d'informations système dans un réseau sans fil - Google Patents

Système et procédé de configuration d'informations système dans un réseau sans fil Download PDF

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Publication number
WO2018227481A1
WO2018227481A1 PCT/CN2017/088457 CN2017088457W WO2018227481A1 WO 2018227481 A1 WO2018227481 A1 WO 2018227481A1 CN 2017088457 W CN2017088457 W CN 2017088457W WO 2018227481 A1 WO2018227481 A1 WO 2018227481A1
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Prior art keywords
system information
node
cell
message
content
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PCT/CN2017/088457
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English (en)
Inventor
Yang Liu
Zhuang Liu
Yin Gao
He Huang
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ZTE Corp
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ZTE Corp
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Priority to PCT/CN2017/088457 priority Critical patent/WO2018227481A1/fr
Priority to CN201780090527.XA priority patent/CN110603827B/zh
Publication of WO2018227481A1 publication Critical patent/WO2018227481A1/fr
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    • 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
    • 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
    • H04W74/002—Transmission of channel access control information
    • H04W74/006—Transmission of channel access control information in the downlink, i.e. towards the terminal
    • 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

  • the disclosure relates generally to wireless communications and, more particularly, to systems and methods for configuring system information in a wireless network.
  • the base station (BS) at the wireless access network side can be divided into two functional entities: a centralized processing network element CU (Centralized Unit) and a distributed processing network element DU (Distributed Unit) .
  • CU Centralized Unit
  • DU Distributed Unit
  • this CU-DU separation architecture can also be suitable for future 4G evolution.
  • each cell transmits the system information associated with the cell by means of broadcasting; all system information is continuously broadcasted by either pre-configuration or pre-scheduling; and the system information is divided into multiple transport blocks according to features and functions.
  • MIB Master Information Block
  • SIB1 System Information Block
  • Other transport blocks are transmitted in form of pre-scheduling (including transmission timing and/or transmission resources) , and the scheduling information is usually in SIB1.
  • One class includes the essential system information, which still uses the broadcast mechanism; and another class includes other system information, called non-essential system information, which uses the on-demand broadcast mechanism only.
  • the essential system information typically includes very critical system information related to the initial access and/or cell residence, such that the information that the cell needs to broadcast is greatly compressed, and the essential system information is periodically broadcasted.
  • the remaining system information belongs the second class, and can use the broadcast transmission mechanism; but they are only transmitted on-demand, rather than periodically, in order to improve resource utilization efficiency.
  • the system information of the cell is configured by its associated base station and circulated in a certain period, where the UE will acquire the system information when needed.
  • the base stations are separated into centralized network elements CUs and distributed network elements DUs, there is no existing solution about how the system information is broadcasted, via the CU and DU, to the UE, or about how the CU and DU cooperate when the system information configuation is updated. So there is an urgent need to propose a new solution for configurating the system information in a network environment of separated CU-DU network elements.
  • exemplary embodiments disclosed herein are directed to solving the issues relating to one or more of the problems presented in the prior art, as well as providing additional features that will become readily apparent by reference to the following detailed description when taken in conjunction with the accompany drawings.
  • exemplary systems, methods, devices and computer program products are disclosed herein. It is understood, however, that these embodiments are presented by way of example and not limitation, and it will be apparent to those of ordinary skill in the art who read the present disclosure that various modifications to the disclosed embodiments can be made while remaining within the scope of the present disclosure.
  • a method implemented on a first node comprises: generating a message related to system information that is associated with at least one cell in a wireless network; and transmitting the message to a second node associated with the at least one cell, wherein the first node and the second node cooperate to serve the at least one cell as a base station.
  • a method implemented on a first node comprises: receiving, from a second node, a message related to system information that is associated with at least one cell in a wireless network, wherein the first node and the second node cooperate to serve the at least one cell as a base station; and transmitting a response to the second node, wherein the response indicates whether content of the message is successfully obtained by the first node or not.
  • a first node comprises: a system information generator configured to generate a message related to system information that is associated with at least one cell in a wireless network; and a transmitter configured to transmit the message to a second node associated with the at least one cell, wherein the first node and the second node cooperate to serve the at least one cell as a base station.
  • a first node comprises: a receiver configured to receive, from a second node, a message related to system information that is associated with at least one cell in a wireless network, wherein the first node and the second node cooperate to serve the at least one cell as a base station; and a transmitter configured to transmit a response to the second node, wherein the response indicates whether content of the message is successfully obtained by the first node or not.
  • FIG. 1 illustrates a CU-DU separation structure of a base station, in accordance with some embodiments of the present disclosure.
  • FIG. 2 illustrates an exemplary block diagram of a centralized unit (CU) , in accordance with some embodiments of the present disclosure.
  • FIG. 3 illustrates exemplary system information (SI) to be configured or reconfigured in a wireless network, in accordance with some embodiments of the present disclosure.
  • SI system information
  • FIG. 4 illustrates an exemplary block diagram of a distributed unit (DU) , in accordance with some embodiments of the present disclosure.
  • DU distributed unit
  • FIG. 5 illustrates an exemplary method of system information configuration between CU and DU, in accordance with some embodiments of the present disclosure.
  • FIG. 6 illustrates an exemplary method of system information reconfiguration between CU and DU, in accordance with some embodiments of the present disclosure.
  • FIG. 7 illustrates an exemplary method for UE to obtain system information configuration on-demand, in accordance with some embodiments of the present disclosure.
  • FIG. 8 illustrates an exemplary method for UE to obtain system information reconfiguration on-demand, in accordance with some embodiments of the present disclosure.
  • FIG. 1 illustrates a CU-DU separation structure of a base station 100, in accordance with some embodiments of the present disclosure.
  • the BS 100 is divided into a CU 110 and a DU 120.
  • the CU 110 and the DU 120 can cooperate to serve a cell as a base station, where there is an ideal or non-ideal front-haul interface 130 between the CU 110 and the DU 120.
  • a CU may control a plurality of DUs at the same time, while a DU can be associated with one cell or a cell list that includes one or more cells.
  • the system can have a baseband centralized processing and provide distributed remote services to users in a cloud architecture.
  • delay-insensitive network functions may be placed in the CU; and delay-sensitive network functions may be placed in the DU.
  • a CU and a DU may have different hardware and structure for implementing the different network functions.
  • the issue of system information configuration between CU and DU has not been effectively solved. For example, how the system information is broadcasted, via the CU and DU, to the UE; and how the CU and DU cooperate and work together when the system information configuration is updated.
  • the present teaching discloses methods and systems for configuring and/or reconfiguring system information in a CU-DU separation network architecture.
  • the present disclosure is applicable to all system information configuration problems in a 5G NR newtork involving a CU-DU separation scenario.
  • FIG. 2 illustrates an exemplary block diagram of a CU 110, in accordance with some embodiments of the present disclosure.
  • the CU 110 is an example of a device that can be configured to implement the various methods described herein.
  • the CU 110 includes a housing 240 containing: a system clock 202, a processor 204, a memory 206, a transceiver 210 comprising a transmitter 212 and receiver 214, a power module 208, a paging generator 220, and a system information generator 222.
  • the system clock 202 provides the timing signals to the processor 204 for controlling the timing of all operations of the CU 110.
  • the processor 204 controls the general operation of the CU 110 and can include one or more processing circuits or modules such as a central processing unit (CPU) and/or any combination of general-purpose microprocessors, microcontrollers, digital signal processors (DSPs) , field programmable gate array (FPGAs) , programmable logic devices (PLDs) , controllers, state machines, gated logic, discrete hardware components, dedicated hardware finite state machines, or any other suitable circuits, devices and/or structures that can perform calculations or other manipulations of data.
  • the processor 204 may calculate a modification period indicating an effective time when the SI associated with a cell will be modified, in accordance with various embodiments of the present disclosure.
  • the memory 206 which can include both read-only memory (ROM) and random access memory (RAM) , can provide instructions and data to the processor 204. A portion of the memory 206 can also include non-volatile random access memory (NVRAM) .
  • the processor 204 typically performs logical and arithmetic operations based on program instructions stored within the memory 206. The instructions (a. k. a., software) stored in the memory 206 can be executed by the processor 204 to perform the methods described herein.
  • the processor 204 and memory 206 together form a processing system that stores and executes software.
  • “software” means any type of instructions, whether referred to as software, firmware, middleware, microcode, etc.
  • Instructions can include code (e.g., in source code format, binary code format, executable code format, or any other suitable format of code) .
  • the instructions when executed by the one or more processors, cause the processing system to perform the various functions described herein.
  • the transceiver 210 which includes the transmitter 212 and receiver 214, allows the CU 110 to transmit and receive data to and from a remote device (e.g., a DU) .
  • a remote device e.g., a DU
  • an antenna 250 may be attached to the housing 240 and electrically coupled to the transceiver 210.
  • the CU 110 includes (not shown) multiple transmitters, multiple receivers, multiple transceivers, and/or multiple antennas.
  • the transmitter 212 can be configured to wirelessly transmit packets having different packet types or functions, such packets being generated by the processor 204.
  • the receiver 214 is configured to receive packets having different packet types or functions
  • the processor 204 is configured to process packets of a plurality of different packet types.
  • the processor 204 can be configured to determine the type of packet and to process the packet and/or fields of the packet accordingly.
  • the CU 110 may communicate with one or more DUs via fiber-optic communication, such that the transmitter 212 and the receiver 214 can be configured to transmit and receive signals respectively through an optical fiber.
  • the system information generator 222 may generate a message related to SI that is associated with one cell or a cell list including one or more cells in a wireless network. After determining a DU that is associated with the one or more cells, the system information generator 222 may send the message to the transmitter 212, and instruct the transmitter 212 to transmit the message to the DU. In one embodiment, when multiple DUs are associated with the cell list, the system information generator 222 may instruct the transmitter 212 to transmit the SI configuration message to each of the multiple DUs.
  • the SI may be generated at a Radio Resource Control (RRC) layer, whose functions are covered by a CU.
  • RRC Radio Resource Control
  • the SI may include both minimum SI that is required for each UE in the one or more cells, and other SI.
  • the minimum SI may include MIB, SIB1, etc.
  • the minimum SI e.g. the MIB, is pre-set based on the communication protocol, and does not need to be included in the SI to be configured.
  • the message (referred as SI configuration message) includes configured SI for the one or more cells.
  • the receiver 214 may receive a response from the DU.
  • the response indicates whether DU has successfully obtained content of the SI configuration message. If the response indicates that DU has not successfully obtained content of the SI configuration message, the transmitter 212 may re-send the SI configuration message after a certain period of time. Alternatively, if the response indicates that DU has not successfully obtained content of the SI configuration message, the system information generator 222 may generate a new SI configuration message including latest SI of the one or more cells, and instruct the transmitter 212 to transmit the new SI configuration message to the DU.
  • the message (referred as SI reconfiguration message) includes reconfigured SI for the one or more cells.
  • the reconfigured SI may include only a modified portion of the originally configured SI.
  • the receiver 214 may receive a response from the DU.
  • the response indicates whether DU has successfully obtained content of the SI reconfiguration message. If the response indicates that DU has not successfully obtained content of the SI reconfiguration message, the transmitter 212 may re-send the SI reconfiguration message after a certain period of time.
  • the system information generator 222 may generate a new SI reconfiguration message including latest modified SI of the one or more cells, and instruct the transmitter 212 to transmit the new SI reconfiguration message to the DU. If the response indicates that DU has successfully obtained content of the SI reconfiguration message, the receiver 214 may inform the paging generator 220 to generate a paging message.
  • the paging generator 220 in this example can generate a paging message when a response received at the receiver 214 indicates that the content of the SI reconfiguration message is successfully obtained by a DU.
  • the paging message indicates a modification of the SI in the one or more cells associated with that DU.
  • the paging generator 220 may then instruct the transmitter 212 to send the paging message in the one or more cells, via the DU.
  • the transmitter 212 may transmit the paging message to the DU; and the DU will forward the paging message in the one or more cells without decoding the paging message.
  • a UE in the one or more cells, after receiving the paging message can know that there is a change or modification of the SI, but does not know the modified content of the SI. Then, the DU may send the modified content of the SI to the UE, either by broadcasting or by on-demand.
  • the SI of a cell is kept to be the same across an entire modification period, and can only be changed or modified at the beginning of a next modification period after a notification of the change one period before. For example, when a modification period is ten minutes, if the system information generator 222 generates some reconfigured SI that is a modification of some portion of the SI of the cell, the CU 110 may notify the DU associated with the cell at the beginning of a first modification period. After the DU successfully obtained the reconfigured SI, the cell may start to use the reconfigured SI ten minutes afterwards, i.e. from the beginning of the next modification period after the first period (second modification period) .
  • the cell will use the old SI through the second modification period; and the reconfigured SI can only be used after the second modification period, assuming it can be successfully notified to the DU at the beginning of the second modification period.
  • the processor 204 may calculate a modification period that indicates an effective time when the SI will be modified next, and instruct the transmitter 212 to transmit the modification period to the DU.
  • the transmitter 212 may send one or more parameters to the DU, such that the DU can calculate the modification period based on the one or more parameters.
  • the one or more parameters may be carried in the SI configuration message, the SI reconfiguration message, or other messages, e.g. a physical layer indication message like downlink control information (DCI) related to cell setup.
  • DCI downlink control information
  • the transmitter 212 may send at least one of the parameters modificationPeriodCoeff and defaultPagingCycle to the DU for the DU to calculate the modification period based on these parameters.
  • the CU may also notify the DU about any changes of the parameters modificationPeriodCoeff and/or defaultPagingCycle themselves.
  • the power module 208 can include a power source such as one or more batteries, and a power regulator, to provide regulated power to each of the above-described modules in FIG. 2.
  • a power source such as one or more batteries
  • a power regulator to provide regulated power to each of the above-described modules in FIG. 2.
  • the power module 208 can include a transformer and a power regulator.
  • the various modules discussed above are coupled together by a bus system 230.
  • the bus system 230 can include a data bus and, for example, a power bus, a control signal bus, and/or a status signal bus in addition to the data bus. It is understood that the modules of the CU 110 can be operatively coupled to one another using any suitable techniques and mediums.
  • processor 204 can implement not only the functionality described above with respect to the processor 204, but also implement the functionality described above with respect to the paging generator 220.
  • each of the modules illustrated in FIG. 2 can be implemented using a plurality of separate components or elements.
  • FIG. 3 illustrates exemplary system information (SI) to be configured or reconfigured in a wireless network, in accordance with some embodiments of the present disclosure.
  • the exemplary SI 300 comprise: a cell ID list 310 including cell IDs of the cells in the cell list associated with the SI (or a cell ID of the cell associated with the SI) ; a separately encoded container 320 for each SI element in the SI; scheduling information 330; indication 340 of broadcast SI or on-demand SI, indicating whether each SI element is to be sent to UEs by broadcasting or on-demand; indication 350 of SI acquiring scheme, indicating e.g.
  • each SI element or each SI element combination is to be acquired by UE via Msg1, Msg3, or a combination of Msg1 and Msg3; a mapping relationship 360 between random access channel (RACH) resources and system information blocks (SIBs) , wherein the RACH resources comprise resources in at least one of: time domain, frequency domain, code domain, and power domain; and configuration parameter information 370 related to SI reconfiguration.
  • RACH random access channel
  • SIBs system information blocks
  • an SI reconfiguration message may include only the modified SI elements, but not include the unmodified SI.
  • the CU may send the modified scheduling information in the SI reconfiguration message to the DU, without sending other unmodified SI listed in FIG. 3.
  • the DU does not need to decode the containers; but the UEs which also include a corresponding RRC layer, can decode the containers to obtain the decoded SI.
  • FIG. 4 illustrates an exemplary block diagram of a DU 120, in accordance with some embodiments of the present disclosure.
  • the DU 120 is an example of a device that can be configured to implement the various methods described herein.
  • the DU 120 includes a housing 440 containing: a system clock 402, a processor 404, a memory 406, a transceiver 410 comprising a transmitter 412 and receiver 414, a power module 408, a paging forwarding unit 420, and a system information broadcaster 422.
  • system clock 402 the processor 404, the memory 406, the transceiver 410 and the power module 408 work similarly to the system clock 202, the processor 204, the memory 206, the transceiver 210 and the power module 208 in the CU 110.
  • an antenna 450 may be attached to the housing 440 and electrically coupled to the transceiver 410.
  • the DU 120 includes (not shown) multiple transmitters, multiple receivers, multiple transceivers, and/or multiple antennas.
  • the DU 120 may communicate with a CU controlling the DU 120 via fiber-optic communication, such that the transmitter 412 and the receiver 414 can be configured to transmit and receive signals respectively through an optical fiber.
  • the receiver 414 may receive a message related to SI that is associated with one cell or a cell list including one or more cells served by a combination of the CU and the DU as a base station in a wireless network.
  • the SI may include both minimum SI that is required for each UE in the one or more cells, and other SI.
  • the minimum SI may include MIB, SIB1, etc.
  • the minimum SI e.g. the MIB, is pre-set based on the communication protocol, and does not need to be included in the SI to be configured or reconfigured.
  • the message (referred as SI configuration message) includes configured SI for the one or more cells.
  • the transmitter 412 may transmit a response to the CU.
  • the response indicates whether the DU 120 has successfully obtained content of the SI configuration message. If the DU has successfully obtained content of the SI configuration message, the system information broadcaster 422 in this example broadcasts via the transmitter 412, in the one or more cells, either all of the configured SI or a portion of the configured SI based on an on-demand request from a UE. In one embodiment, the system information broadcaster 422 broadcasts all of the configured SI in the one or more cells according to scheduling information in the configured SI, after successfully obtaining the content of the message.
  • the system information broadcaster 422 waits for the receiver 414 to receive, from a UE in the one or more cells, an on-demand request for a portion of the configured SI needed by the UE. Then, in response to the on-demand request, the system information broadcaster 422 broadcast, via the transmitter 412, the requested portion of the configured SI to the UE according to the scheduling information in the configured SI.
  • the message (referred as SI reconfiguration message) includes reconfigured SI for the one or more cells.
  • the reconfigured SI may include only a modified portion of the originally configured SI.
  • the transmitter 412 may transmit a response to the CU to indicate whether the DU 120 has successfully obtained content of the SI reconfiguration message. If the response indicates that DU has successfully obtained content of the SI reconfiguration message, the receiver 414 may receive a paging message from the CU. The paging message indicates a modification of the SI in the one or more cells associated with that DU.
  • the paging forwarding unit 420 in this example can forward the paging message in the one or more cells without decoding the paging message.
  • a UE in the one or more cells after receiving the paging message, can know that there is a change or modification of the SI, but does not know the modified content of the SI.
  • the system information broadcaster 422 may broadcast the modified content of the SI to the UE, either by broadcasting or by on-demand, similar to the broadcasting of configured SI by the system information broadcaster 422 as discussed before.
  • the CU may calculate a modification period that indicates an effective time when the SI will be modified next, and transmit the modification period to the DU 120.
  • the receiver 414 may receive one or more parameters from the CU, such that the processor 404 can calculate the modification period based on the one or more parameters.
  • the one or more parameters may be carried in the SI configuration message, the SI reconfiguration message, or other messages, e.g. a physical layer indication message like DCI related to cell setup.
  • the various modules discussed above are coupled together by a bus system 430.
  • the bus system 430 can include a data bus and, for example, a power bus, a control signal bus, and/or a status signal bus in addition to the data bus. It is understood that the modules of the DU 120 can be operatively coupled to one another using any suitable techniques and mediums.
  • processor 404 can implement not only the functionality described above with respect to the processor 404, but also implement the functionality described above with respect to the paging forwarding unit 420.
  • each of the modules illustrated in FIG. 4 can be implemented using a plurality of separate components or elements.
  • FIG. 5 illustrates an exemplary method of system information configuration between a CU 510 and a DU 520, in accordance with some embodiments of the present disclosure.
  • the CU 510 may have a structure as shown in FIG. 2; and the DU 520 may have a structure as shown in FIG. 4.
  • FIG. 5 illustrates an exemplary method of system information configuration between a CU 510 and a DU 520, in accordance with some embodiments of the present disclosure.
  • the CU 510 may have a structure as shown in FIG. 2; and the DU 520 may have a structure as shown in FIG. 4.
  • FIG. 5 illustrates an exemplary method of system information configuration between a CU 510 and a DU 520, in accordance with some embodiments of the present disclosure.
  • the CU 510 may have a structure as shown in FIG. 2; and the DU 520 may have a structure as shown in FIG. 4.
  • FIG. 5 illustrates an exemplary method of system information configuration between a CU 510
  • the CU 510 sends, at step 542, a system information configuration message to the DU 520, where the message includes but is not limited to the following information: cell IDs of the cells in the cell list associated with the SI (or a cell ID of the cell associated with the SI) ; a separately encoded container for each SI element in the SI; scheduling information; indication of broadcast SI or on-demand SI, indicating whether each SI element is to be sent to UEs by broadcasting or on-demand; indication of SI acquiring scheme, indicating e.g.
  • RACH random access channel
  • SIBs system information blocks
  • the DU 520 sends, at step 544, an SI configuration response message to the CU 510 to indicate that the reception of system information configuration succeeded or failed.
  • the DU 520 After the DU 520 has successfully obtained content of the above-mentioned system information configuration message, the DU 520 transmits, at step 552, the system information to UEs, e.g. the UE 530, in the one or more cells associated with the DU 520, by means of broadcasting according to the scheduling information in the system information.
  • the system information e.g. the UE 530
  • FIG. 6 illustrates an exemplary method of system information reconfiguration between a CU 610 and a DU 620, in accordance with some embodiments of the present disclosure.
  • the CU 610 may have a structure as shown in FIG. 2; and the DU 620 may have a structure as shown in FIG. 4.
  • FIG. 6 illustrates an exemplary method of system information reconfiguration between a CU 610 and a DU 620, in accordance with some embodiments of the present disclosure.
  • the CU 610 may have a structure as shown in FIG. 2; and the DU 620 may have a structure as shown in FIG. 4.
  • FIG. 6 illustrates an exemplary method of system information reconfiguration between a CU 610 and a DU 620, in accordance with some embodiments of the present disclosure.
  • the CU 610 may have a structure as shown in FIG. 2; and the DU 620 may have a structure as shown in FIG. 4.
  • FIG. 6 illustrates an exemplary method of system information reconfiguration between a
  • the CU 610 sends, at step 642, a system information reconfiguration message to the DU 620, where the message includes information related to the modified/updated part of the system information, including: cell IDs of the cells in the cell list associated with the reconfigured SI (or a cell ID of the cell associated with the reconfigured SI) ; a separately encoded container for each reconfigured SI element; modified scheduling information; indication of modified broadcast SI or modified on-demand SI, indicating whether each modified SI element is to be sent to UEs by broadcasting or on-demand; indication of modified SI acquiring scheme, indicating e.g.
  • each modified SI element or each modified SI element combination is to be acquired by UE via Msg1, Msg3, or a combination of Msg1 and Msg3; a modified mapping relationship between random access channel (RACH) resources and system information blocks (SIBs) , wherein the RACH resources comprise resources in at least one of: time domain, frequency domain, code domain, and power domain; and parameter information related to reconfiguration of the SI, etc.
  • RACH random access channel
  • SIBs system information blocks
  • one method is for the CU 610 to calculate the period and send it to the DU 620; another method is for the CU 610 to send all parameters related to the modification period calculation to the DU 620, and the DU 620 will calculate the modification period.
  • the DU 620 sends, at step 644, an SI configuration response message to the CU 610 to indicate whether the reception of the modified system information configuration succeeded or failed.
  • the CU 610 After the DU 620 has successfully obtained the system information reconfiguration message, the CU 610 sends a paging message to UEs, e.g. the UE 630, in the one or more cells, through the DU 620.
  • the paging message comprises an indication indicating a modification/update of the system information in the one or more cells.
  • the DU 620 transmits, at step 652, the system information to UEs, e.g. the UE 630, in the one or more cells associated with the DU 620, by means of broadcasting according to the scheduling information in the system information.
  • FIG. 7 illustrates an exemplary method for UE to obtain system information configuration on-demand, in accordance with some embodiments of the present disclosure.
  • the CU 710 may have a structure as shown in FIG. 2; and the DU 720 may have a structure as shown in FIG. 4. As shown in FIG. 1
  • the CU 710 sends a system information configuration message including all system information configuration to the DU 720, where the message includes but is not limited to the following information: cell IDs of the cells in the cell list associated with the SI (or a cell ID of the cell associated with the SI) ; a separately encoded container for each SI element in the SI; scheduling information; indication of broadcast SI or on-demand SI, indicating whether each SI element is to be sent to UEs by broadcasting or on-demand; indication of SI acquiring scheme, indicating e.g.
  • RACH random access channel
  • SIBs system information blocks
  • the DU 720 sends, at step 744, an SI configuration response message to the CU 710 to indicate that the reception of system information configuration succeeded or failed.
  • the DU 720 After the DU 720 has successfully obtained content of the above-mentioned system information configuration message, the DU 720 stores the system information, and wait to receive, at step 752, an on-demand system information request from a UE, e.g. the UE 730.
  • the UE 730 sends the on-demand SI request based on the UE’s own situation.
  • the on-demand SI request may be in the form of Msg1 (i.e. Preamble) or Msg3.
  • the DU 720 After the DU 720 receives the on-demand system information request from the UE 730, the DU 720 sends, at step 754, the partial system information requested by the UE 730, to the UE 730 by means of broadcasting, according to the scheduling information in the configured SI.
  • the partial system information includes but is not limited to the on-demand SI.
  • FIG. 8 illustrates an exemplary method for UE to obtain system information reconfiguration on-demand, in accordance with some embodiments of the present disclosure.
  • the CU 810 may have a structure as shown in FIG. 2; and the DU 820 may have a structure as shown in FIG. 4. As shown in FIG. 2
  • the CU 810 sends, at step 842, a system information reconfiguration message to the DU 820, where the message includes information related to the modified/updated part of the system information, including: cell IDs of the cells in the cell list associated with the reconfigured SI (or a cell ID of the cell associated with the reconfigured SI) ; a separately encoded container for each reconfigured SI element; modified scheduling information; indication of modified broadcast SI or modified on-demand SI, indicating whether each modified SI element is to be sent to UEs by broadcasting or on-demand; indication of modified SI acquiring scheme, indicating e.g.
  • each modified SI element or each modified SI element combination is to be acquired by UE via Msg1, Msg3, or a combination of Msg1 and Msg3; a modified mapping relationship between random access channel (RACH) resources and system information blocks (SIBs) , wherein the RACH resources comprise resources in at least one of: time domain, frequency domain, code domain, and power domain; and parameter information related to reconfiguration of the SI, etc.
  • RACH random access channel
  • SIBs system information blocks
  • one method is for the CU 810 to calculate the period and send it to the DU 820; another method is for the CU 810 to send all parameters related to the modification period calculation to the DU 820, and the DU 820 will calculate the modification period.
  • the DU 820 sends, at step 844, an SI configuration response message to the CU 810 to indicate whether the reception of the modified system information configuration succeeded or failed.
  • the CU 810 After the DU 820 has successfully obtained the system information reconfiguration message, the CU 810 sends a paging message to UEs, e.g. the UE 830, in the one or more cells, through the DU 820.
  • the paging message comprises an indication indicating a modification/update of the system information in the one or more cells.
  • the DU 820 stores the reconfigured SI, and wait to receive, at step 852, an on-demand updated system information request from a UE, e.g. the UE 830.
  • the UE 830 sends the on-demand updated SI request based on the UE’s own situation.
  • the on-demand updated SI request may be in the form of Msg1 (i.e. Preamble) or Msg3.
  • the DU 820 After the DU 820 receives the on-demand updated system information request from the UE 830, the DU 820 sends, at step 854, the partial system information requested by the UE 830, to the UE 830 by means of broadcasting, according to the scheduling information in the reconfigured SI.
  • the partial system information includes but is not limited to the on-demand updated SI.
  • the DU can modify part of the stream field of the SI, e.g. system frame number (SFN) , indication of whether on-demand SI is being broadcasted, etc.
  • SI system frame number
  • the indication information can be maintained on the DU side, where the DU can modify the stream field, corresponding to the indication information, in the SI container.
  • a value tag systemInfoValueTag in SIB1 indicates if a change has occurred in the SI messages.
  • a UE can also check this value tag to verify whether the previous SI is still valid, without receiving the paging message.
  • another method to indicate the SI changes is by using downlink control information (DCI) .
  • DCI downlink control information
  • any reference to an element herein using a designation such as “first, “ “second, “ and so forth does not generally limit the quantity or order of those elements. Rather, these designations can be used herein as a convenient means of distinguishing between two or more elements or instances of an element. Thus, a reference to first and second elements does not mean that only two elements can be employed, or that the first element must precede the second element in some manner.
  • any of the various illustrative logical blocks, modules, processors, means, circuits, methods and functions described in connection with the aspects disclosed herein can be implemented by electronic hardware (e.g., a digital implementation, an analog implementation, or a combination of the two) , firmware, various forms of program or design code incorporating instructions (which can be referred to herein, for convenience, as "software” or a "software module) , or any combination of these techniques.
  • a processor, device, component, circuit, structure, machine, module, etc. can be configured to perform one or more of the functions described herein.
  • IC integrated circuit
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • the logical blocks, modules, and circuits can further include antennas and/or transceivers to communicate with various components within the network or within the device.
  • a general purpose processor can be a microprocessor, but in the alternative, the processor can be any conventional processor, controller, or state machine.
  • a processor can also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other suitable configuration to perform the functions described herein.
  • Computer-readable media includes both computer storage media and communication media including any medium that can be enabled to transfer a computer program or code from one place to another.
  • a storage media can be any available media that can be accessed by a computer.
  • such computer-readable media can include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store desired program code in the form of instructions or data structures and that can be accessed by a computer.
  • module refers to software, firmware, hardware, and any combination of these elements for performing the associated functions described herein. Additionally, for purpose of discussion, the various modules are described as discrete modules; however, as would be apparent to one of ordinary skill in the art, two or more modules may be combined to form a single module that performs the associated functions according embodiments of the present disclosure.
  • memory or other storage may be employed in embodiments of the present disclosure.
  • memory or other storage may be employed in embodiments of the present disclosure.
  • any suitable distribution of functionality between different functional units, processing logic elements or domains may be used without detracting from the present disclosure.
  • functionality illustrated to be performed by separate processing logic elements, or controllers may be performed by the same processing logic element, or controller.
  • references to specific functional units are only references to a suitable means for providing the described functionality, rather than indicative of a strict logical or physical structure or organization.

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  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé et un système de configuration d'informations système dans un réseau sans fil. Dans un mode de réalisation, l'invention concerne un procédé mis en œuvre sur un premier nœud. Le procédé consiste à : générer un message relatif à des informations système qui sont associées à au moins une cellule dans un réseau sans fil ; et transmettre le message à un second nœud associé à l'au moins une cellule, le premier nœud et le second nœud coopérant pour desservir l'au moins une cellule en tant que station de base.
PCT/CN2017/088457 2017-06-15 2017-06-15 Système et procédé de configuration d'informations système dans un réseau sans fil Ceased WO2018227481A1 (fr)

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CN201780090527.XA CN110603827B (zh) 2017-06-15 2017-06-15 用于在无线网络中配置系统信息的系统和方法

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CN112703751A (zh) * 2019-08-14 2021-04-23 诺基亚通信公司 系统信息传递增强
WO2021031719A1 (fr) * 2019-08-22 2021-02-25 中兴通讯股份有限公司 Procédé et dispositif de gestion coopérative de canal, et station de base
WO2021035499A1 (fr) * 2019-08-26 2021-03-04 华为技术有限公司 Procédé et dispositif de communication et système de communication
WO2025209702A1 (fr) * 2024-04-05 2025-10-09 Nokia Technologies Oy Signalisation pour prendre en charge un type un de bloc d'informations de système à la demande

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