WO2020206643A1 - 一种随机接入方法、设备及存储介质 - Google Patents

一种随机接入方法、设备及存储介质 Download PDF

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Publication number
WO2020206643A1
WO2020206643A1 PCT/CN2019/082136 CN2019082136W WO2020206643A1 WO 2020206643 A1 WO2020206643 A1 WO 2020206643A1 CN 2019082136 W CN2019082136 W CN 2019082136W WO 2020206643 A1 WO2020206643 A1 WO 2020206643A1
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Prior art keywords
random access
type
terminal device
access type
threshold
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PCT/CN2019/082136
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English (en)
French (fr)
Inventor
石聪
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Application filed by Guangdong Oppo Mobile Telecommunications Corp Ltd filed Critical Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority to EP19923900.5A priority Critical patent/EP3944712A4/en
Priority to PCT/CN2019/082136 priority patent/WO2020206643A1/zh
Priority to CN201980064518.2A priority patent/CN112806086B/zh
Publication of WO2020206643A1 publication Critical patent/WO2020206643A1/zh
Priority to US17/491,694 priority patent/US20220022269A1/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
    • 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
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • 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
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0866—Non-scheduled access, e.g. ALOHA using a dedicated channel for access

Definitions

  • the present invention relates to the field of wireless communication technology, and in particular to a random access method, equipment and storage medium.
  • a terminal device establishes a wireless link with a network device through random access (Random Access Channel, RACH). Therefore, how the terminal device can perform random access to increase the success rate of random access is a problem to be solved.
  • RACH Random Access Channel
  • embodiments of the present invention provide a random access method, device, and storage medium.
  • the success rate of random access can be improved.
  • an embodiment of the present invention provides a random access method, including: a terminal device determines a random access type based on at least one of the following: selection parameters of the random access type, signal strength parameters of the serving cell, and uplink Resource configuration of the bandwidth part.
  • an embodiment of the present invention provides a random access method, including: a network device sends a random access type selection parameter, and the random access type selection parameter is used by a terminal device to determine a random access type.
  • an embodiment of the present invention provides a terminal device including: a processing unit configured to determine a random access type based on at least one of the following: selection parameters of the random access type, signal strength parameters of the serving cell, and Resource configuration of the uplink bandwidth part.
  • an embodiment of the present invention provides a network device, and the network device includes:
  • the sending unit is configured to send selection parameters of the random access type, and the selection parameters of the random access type are used by the terminal device to determine the random access type.
  • an embodiment of the present invention provides a terminal device, including a processor and a memory for storing a computer program that can run on the processor, wherein the processor is used to execute the above-mentioned terminal when the computer program is running. The steps of the random access method performed by the device.
  • an embodiment of the present invention provides a network device, including a processor and a memory for storing a computer program that can run on the processor, wherein the processor is used to execute the above network when the computer program is running. The steps of the random access method performed by the device.
  • an embodiment of the present invention provides a storage medium that stores an executable program, and when the executable program is executed by a processor, it implements the random access method executed by the terminal device.
  • an embodiment of the present invention provides a storage medium storing an executable program, and when the executable program is executed by a processor, the random access method executed by the above-mentioned network device is implemented.
  • the random access method provided by the embodiment of the present invention includes: the selection parameters of the terminal equipment based on the random access type, or the selection parameters based on the signal strength parameter of the serving cell and the random access type, or the resource configuration based on the uplink bandwidth part and The selection parameter of the random access type, or the random access type is determined based on the resource configuration of the uplink bandwidth part, the signal strength parameter of the serving cell, and the selection parameter of the random access type. Since the selection parameters of the random access type are related to the load of the random access type, the terminal device can use the network load as a reference factor when selecting the random access type, and realize the first type of random access and the second type of random access. Load balancing of random access not only optimizes resource utilization, but also improves the success rate of random access for terminal equipment.
  • Figure 1 is a schematic diagram of the processing flow of the second type of random access according to the present invention.
  • FIG. 2 is a schematic diagram of the structure of the RAR of the present invention.
  • Figure 3a is a schematic diagram of a format of the subheader of the present invention.
  • Figure 3b is a schematic diagram of another format of the subheader of the present invention.
  • FIG. 4 is a schematic diagram of the structure of MAC PDU composed of RAR according to the present invention.
  • FIG. 5 is a schematic diagram of the processing flow of the first type of random access in the present invention
  • FIG. 6 is a schematic diagram of the composition structure of a communication system according to an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of an optional processing flow of a random access method provided by an embodiment of the present invention.
  • FIG. 8 is a schematic diagram of the composition structure of a terminal device provided by an embodiment of the present invention.
  • FIG. 9 is a schematic diagram of the composition structure of a network device provided by an embodiment of the present invention.
  • FIG. 10 is a schematic diagram of the hardware composition structure of an electronic device according to an embodiment of the present invention.
  • RACH includes: Type 1 random access and Type 2 random access.
  • the first type of random access in the first type of random access, the terminal device and the network device need to perform two information exchanges. Therefore, the first type of random access is also called 2-steps RACH.
  • the second type of random access the terminal device and the network device need to perform 4 information exchanges; therefore, the second type of random access is also called 4-steps RACH.
  • random access includes contention-based random access and non-contention-based random access.
  • random access includes the first type of random access and the second type of random access. The following briefly describes the first type of random access and the second type of random access.
  • the processing flow of the second type of random access includes the following four steps:
  • step S101 the terminal device sends a random access preamble to the network device through a message 1 (message 1, Msg1).
  • the terminal device sends the selected Preamble on the selected PRACH time domain resource; the network device can estimate the uplink Timing and the size of the uplink authorization required for the terminal device to transmit Msg3 based on the Preamble.
  • Step S102 After detecting that a terminal device sends a preamble, the network device sends a random access response (Random Access Response, RAR) message to the terminal device through Msg2 to inform the terminal device of the uplink resource information that can be used when sending Msg3.
  • RAR Random Access Response
  • the equipment allocates a temporary radio network temporary identity (RNTI) to provide time advance command for terminal equipment.
  • RNTI temporary radio network temporary identity
  • the terminal device After sending Msg1, the terminal device opens a RAR window and detects PDCCH in the RAR window; the detected PDCCH is scrambled with RA-RNTI, and the RA-RNTI calculation formula is as follows:
  • RA-RNTI 1+s_id+14 ⁇ t_id+14 ⁇ 80 ⁇ f_id+14 ⁇ 80 ⁇ 8 ⁇ ul_carrier_id;
  • RA-RNTI is related to PRACH time-frequency resources.
  • RAR structure diagram as shown in Figure 2, RAR includes subheader (subheader), RAPID, payload, uplink (UpLinkUL) grant (grant) and Temporary C-RNTI; among them, the format diagram of subheader, as shown in Figure 3a and Figure 3b As shown, BI is used to indicate the backoff time of retransmitting Msg1.
  • MAC PDU Media Access Control Protocol Data Unit
  • Step S103 After receiving the RAR message, the terminal device sends Msg3 in the uplink resource specified by the RAR message.
  • the message of Msg3 is mainly used to notify the network device of what event triggered the RACH process. For example, if it is an initial random access event, the terminal device ID and establishment cause will be carried in Msg3; if it is an RRC reestablishment event, the connected terminal device identification and establishment cause will be carried in Msg3.
  • Step S104 The network device sends Msg4 to the terminal device, and Msg4 includes a contention resolution message, and at the same time allocates uplink transmission resources for the terminal device.
  • the terminal device When the terminal device receives the Msg4 sent by the network device, it will detect whether the terminal device specific temporary identifier sent by the terminal device in Msg3 is included in the contention resolution message sent by the base station. If it is included, it indicates that the terminal device random access process is successful, otherwise it is considered random If the process fails, the terminal device needs to initiate the random access process again from the first step.
  • Msg4 Another function of Msg4 is to send radio resource control (Radio Resource Control, RRC) configuration messages to terminal devices.
  • RRC Radio Resource Control
  • the first way is: if the terminal device carries the Cell Radio Network Tempory Identity (C-RNTI) in Msg3, Msg4 uses C-RNTI scrambled Physical Downlink Control Channel (Physical Downlink Control Channel, PDCCH) scheduling.
  • the second method is: if the terminal device does not carry C-RNTI in Msg3, such as the terminal device is initial access, Msg4 uses TC-RNTI scrambled PDCCH scheduling; conflict resolution is to receive the physical downlink of Msg4 through the terminal device
  • the Shared Channel Physical Downlink Shared Channel, PDSCH
  • CCCH Common Control Channel
  • SDU Service Data Unit
  • the message content carried by Msg1, Msg2, Msg3, and Msg4 in the second type of random access is shown in Table 1.
  • the above-mentioned RACH process requires four information exchanges between the network equipment and the terminal equipment to complete, resulting in the time extension of the RACH process; in order to solve the problem of the time extension of the RACH process, the first type of random access and the first type of random access processing are proposed
  • the process as shown in Figure 5, includes the following steps:
  • Step S201 The terminal device sends MsgA to the network device.
  • MsgA is composed of Preamble and payload.
  • the preamble is the same as the preamble in the second type of random access, and the preamble is transmitted on the PRACH resource;
  • the information carried in the payload is the same as the information in the Msg3 in the second type of random access, for example, when the RRC is idle
  • the payload can be transmitted by the Physical Uplink Shared Channel (PUSCH).
  • PUSCH Physical Uplink Shared Channel
  • the results of receiving MsgA by the network device may include the following two types: the first type, the network device successfully decodes one or more preambles; the second type, the network device successfully decodes one or more preambles and one or more payloads.
  • Step S202 The terminal device receives the MsgB sent by the network device.
  • MsgB includes the content of Msg2 and Msg4 in the second type of random access.
  • the terminal device with the first type of random access capability is based on the received target power or the reference signal receiving power of the serving cell (Reference Signal Receiving Power, RSRP) to determine whether to select the first type of random access or the second type of random access. For example, when the received target power is greater than the power threshold, or when the RSRP of the serving cell is greater than the RSRP threshold, the terminal device selects the first type of random access.
  • RSRP Reference Signal Receiving Power
  • the random access method in the embodiments of this application can be applied to various communication systems, such as: Global System of Mobile Communication (GSM) system, multiple code division Address (Code Division Multiple Access, CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system , LTE Frequency Division Duplex (Frequency Division Duplex, FDD) system, LTE Time Division Duplex (Time Division Duplex, TDD), Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access, WiMAX) communication system or 5G system, etc.
  • GSM Global System of Mobile Communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • LTE Frequency Division Duplex Frequency Division Duplex
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • UMTS Universal Mobile Telecommunication System
  • WiMAX Worldwide Interoperability for Micro
  • the communication system 100 applied in the embodiment of the present application is shown in FIG. 6.
  • the communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with a terminal device 120 (or called a communication terminal or terminal).
  • the network device 110 can provide communication coverage for a specific geographic area, and can communicate with terminal devices located in the coverage area.
  • the network device 110 may be a base station (Base Transceiver Station, BTS) in a GSM system or a CDMA system, a base station (NodeB, NB) in a WCDMA system, or an evolved base station in an LTE system (Evolutional Node B, eNB or eNodeB), it can also be the base station (gNB) in the NR/5G system, or the radio controller in the Cloud Radio Access Network (CRAN), or the network equipment can For mobile switching centers, relay stations, access points, in-vehicle devices, wearable devices, hubs, switches, bridges, routers, network side devices in 5G networks, or future evolution of public land mobile networks (Public Land Mobile Network, PLMN) Network equipment, etc.
  • BTS Base Transceiver Station
  • NodeB NodeB
  • NB base station
  • WCDMA Wideband Code Division Multiple Access
  • LTE Long Term Evolutional Node B
  • eNB evolved base station in an LTE system
  • LTE Long Term Evolution
  • the communication system 100 also includes at least one terminal device 120 located within the coverage area of the network device 110.
  • the "terminal equipment” used here includes but is not limited to connection via wired lines, such as via public switched telephone networks (PSTN), digital subscriber lines (Digital Subscriber Line, DSL), digital cables, and direct cable connections ; And/or another data connection/network; and/or via a wireless interface, such as for cellular networks, wireless local area networks (WLAN), digital TV networks such as DVB-H networks, satellite networks, AM- FM broadcast transmitter; and/or another terminal device that is set to receive/send communication signals; and/or Internet of Things (IoT) equipment.
  • PSTN public switched telephone networks
  • DSL Digital Subscriber Line
  • DSL Digital Subscriber Line
  • DSL Digital Subscriber Line
  • DSL Digital Subscriber Line
  • DSL Digital Subscriber Line
  • DSL Digital Subscriber Line
  • DSL Digital Subscriber Line
  • DSL Digital Subscriber Line
  • DSL Digital Subscriber Line
  • DSL Digital Subscriber Line
  • DSL
  • a terminal device set to communicate through a wireless interface may be referred to as a "wireless communication terminal", a “wireless terminal” or a “mobile terminal”.
  • mobile terminals include, but are not limited to, satellites or cellular phones; Personal Communications System (PCS) terminals that can combine cellular radio phones with data processing, fax, and data communication capabilities; can include radio phones, pagers, Internet/intranet PDA with internet access, web browser, memo pad, calendar, and/or Global Positioning System (GPS) receiver; and conventional laptop and/or palmtop receivers or others including radio phone transceivers Electronic device.
  • PCS Personal Communications System
  • GPS Global Positioning System
  • Terminal equipment can refer to access terminals, user equipment (UE), user units, user stations, mobile stations, mobile stations, remote stations, remote terminals, mobile equipment, user terminals, terminals, wireless communication equipment, user agents, or User device.
  • the access terminal can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital processing (Personal Digital Assistant, PDA), with wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in 5G networks, or terminal devices in the future evolution of PLMN, etc.
  • SIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Assistant
  • direct terminal connection (Device to Device, D2D) communication may be performed between the terminal devices 120.
  • the 5G system or 5G network may also be referred to as a New Radio (NR) system or NR network.
  • NR New Radio
  • Figure 6 exemplarily shows one network device and two terminal devices.
  • the communication system 100 may include multiple network devices and the coverage of each network device may include other numbers of terminal devices. The embodiment does not limit this.
  • the communication system 100 may also include other network entities such as a network controller and a mobility management entity, which are not limited in the embodiment of the present application.
  • network entities such as a network controller and a mobility management entity, which are not limited in the embodiment of the present application.
  • the devices with communication functions in the network/system in the embodiments of the present application may be referred to as communication devices.
  • the communication device may include a network device 110 with communication functions and a terminal device 120.
  • the network device 110 and the terminal device 120 may be the specific devices described above, which will not be repeated here.
  • the communication device may also include other devices in the communication system 100, such as other network entities such as a network controller and a mobility management entity, which are not limited in this embodiment of the application.
  • An optional processing procedure of the random access method provided by the embodiment of the present invention, as shown in FIG. 7, includes the following steps:
  • Step S301 The terminal device determines the random access type based on at least one of the following: the selection parameter of the random access type, the signal strength parameter of the serving cell, and the resource configuration of the uplink bandwidth part.
  • the terminal device before the terminal device performs step S301, the terminal device needs to first receive the random access type selection parameter sent by the network device through a system message or RRC dedicated signaling.
  • the random access type selection parameter includes a weight parameter of the random access type, or a parameter related to the load of the random access type.
  • the selection parameter of the random access type may be the weight parameter of the current type 1 random access type and the weight parameter of the current type 2 random access type; the selection parameter of the random access type may also be the weight parameter of the random access type. Load related parameters of the input type.
  • the parameters related to the load of the random access type are determined by the number X of terminal devices performing random access of the first type in the serving cell and the number Y of terminals performing random access of the second type in the serving cell;
  • the parameter value related to the load of the random access type is equal to Y/(X+Y), and the parameter value related to the load of the second random access type is equal to X/(X+Y). If the load of the first type of random access type is high, then the parameter value related to the load of the first type of random access type is low, and vice versa.
  • the terminal device When the terminal device determines the random access type based on the selection parameters of the random access type, the terminal device first generates a random number, and selects the random access type by comparing the random number with the selection parameters of the random access type; optionally, The terminal device can generate a random number between 0 and 1 according to a uniform distribution. In some embodiments, taking the random access type selection parameter as the first selection parameter corresponding to the first type of random access as an example, in a case where the random number is less than the first selection parameter, the terminal device determines the random access type It is the first type of random access; when the random number is greater than or equal to the first selection parameter, the terminal device determines that the random access type is the second type of random access.
  • the first selection parameter corresponding to the first type of random access is 0.5, and if the random number generated by the terminal device is 0.2, the terminal device determines that the random access type is the first type of random access; if the random number generated by the terminal device is 0.6, the terminal device determines that the random access type is the second type of random access.
  • taking the random access type selection parameter as the second selection parameter corresponding to the second type of random access as an example in the case that the random number is greater than the second selection parameter, the terminal device determines the random The access type is the second type of random access; when the random number is less than or equal to the second selection parameter, the terminal device determines that the random access type is the first type of random access.
  • the second selection parameter corresponding to the second type of random access is 0.6, and if the random number generated by the terminal device is 0.5, the terminal device determines that the random access type is the first type of random access; if the random number generated by the terminal device is 0.7, the terminal device determines that the random access type is the second type of random access.
  • the selection parameter of the random access type is carried by a system broadcast message or RRC dedicated signaling.
  • the network device broadcasts the selection parameters of the random access type through the system message SIB for the idle state, inactive state, and connected state. ) Terminal equipment use in the state.
  • the RRC dedicated signaling may be an RRC connection establishment message, an RRC connection reestablishment message, an RRC connection recovery message, or an RRC connection reconfiguration message, etc.;
  • the RRC dedicated signaling carries the selection parameter of the random access type, so that the terminal device in the connected state can select the random access type when triggering the random access process.
  • the RRC dedicated signaling may also be an RRC connection release message, and the RRC connection release message carries the random access type selection parameter for idle
  • the terminal device in the state and inactive state selects the random access type.
  • the terminal device can use the load of the network as a reference factor when selecting the random access type, thereby realizing the first type of random access.
  • the load balancing between access and the second type of random access not only optimizes resource utilization, but also improves the success rate of random access for terminal equipment.
  • the signal strength parameter of the serving cell is RSRP; the signal strength parameter of the serving cell is also It can be RSRQ, or Signal to Interference plus Noise Ratio (SINR), or Timing Advanced (TA) value, or the target power received by the terminal device (Received Target Power), or the
  • the signal strength parameters of the serving cell are other parameters that can characterize the signal strength of the serving cell.
  • the signal strength parameter of the serving cell is RSRP as an example.
  • the terminal device determines that the random access type is the second type of random access; the RSRP of the serving cell If it is greater than the first threshold, the terminal device determines the random access type based on the selection parameter of the random access type.
  • the terminal device determining the random access type based on the selection parameter of the random access type is the same as the implementation in the foregoing embodiment, and will not be repeated here.
  • the terminal device determines that the random access type is the second type of random access; in Received Target Power If it is greater than the first threshold, the terminal device determines the random access type based on the selection parameter of the random access type.
  • the terminal device determining the random access type based on the selection parameter of the random access type is the same as the implementation in the foregoing embodiment, and will not be repeated here.
  • the terminal device determines that the random access type is the first type of random access; when the TA value is greater than the first threshold In the case of, the terminal device determines the random access type based on the selection parameter of the random access type.
  • the terminal device determining the random access type based on the selection parameter of the random access type is the same as the implementation in the foregoing embodiment, and will not be repeated here.
  • the signal strength parameter of the serving cell is RSRP; the signal strength parameter of the serving cell is also It may be RSRQ, or SINR, or TA value, or Received Target Power, or the signal strength parameter of the serving cell is another parameter that can characterize the signal strength of the serving cell.
  • the terminal device determines that the random access type is the first type of random access;
  • the terminal device is located in the center of the serving cell, and the TA value is small or close to 0, which is conducive to the correct decoding of the payload of the first type of random access by the network device.
  • the terminal device determines that the random access type is the second type of random access; at this time, it is considered that the terminal device is at the edge of the serving cell, and the TA value Larger, it is not conducive to the correct decoding of the first-type random access payload by the network equipment; moreover, due to the large deviation of the TA value, sending the first-type random access payload will increase the uplink interference of the system.
  • the terminal device determines the access type based on the selection parameter of the random access type; or The terminal device randomly determines the random access type.
  • the second threshold and the third threshold are values corresponding to RSRP, and the terminal device determines the random access type based on the selection parameter of the random access type in the same manner as the implementation in the foregoing embodiment, and will not be repeated here.
  • the terminal device randomly determines the random access type, it can randomly determine an access type from the first type of random access and the second type of random access according to the same probability.
  • the terminal device determines that the random access type is the first type of random access;
  • the terminal device is located in the center of the serving cell, and the TA value is small or close to 0, which is conducive to the correct decoding of the payload of the first type of random access by the network device.
  • the terminal device determines that the random access type is the second type of random access; at this time, it is considered that the terminal device is at the edge of the serving cell and the TA value is relatively large, It is not conducive for the first type of random access payload to be correctly decoded by the network equipment; moreover, due to the large deviation of the TA value, sending the first type of random access payload will increase the uplink interference of the system.
  • the terminal device determines the access type based on the selection parameter of the random access type; or the terminal The device randomly determines the type of random access.
  • the second threshold and the third threshold are values corresponding to Received Target Power, and the terminal device determines the random access type based on the selection parameter of the random access type in the same manner as the implementation in the foregoing embodiment, and will not be repeated here.
  • the terminal device randomly determines the random access type it can randomly determine an access type from the first type of random access and the second type of random access according to the same probability.
  • the terminal device randomly determines the random access type the terminal device determines whether the random access type is the first type random access or the second type random access by taking the modulus of 2 according to its own identifier (ID).
  • ID modulus of 2 according to its own identifier
  • the random access type is determined to be the first type of random access; when the modulus result is 1, the random access type is determined to be the second type of random access.
  • the ID may be the 5G system architecture evolution temporary mobile subscriber identity (System Architecture Evolution, Mobile Subscriber Identity, S-TMSI) used when the connection is established, or it may be the deactivated wireless network temporary identity used in the connection restoration process (Inactive Radio Network Tempory Identity, I-RNTI), or short MAC-I used in the connection re-establishment process.
  • 5G system architecture evolution temporary mobile subscriber identity System Architecture Evolution, Mobile Subscriber Identity, S-TMSI
  • I-RNTI Inactive Radio Network Tempory Identity
  • short MAC-I used in the connection re-establishment process.
  • the terminal device determines that the random access type is the first type of random access; at this time, the terminal is considered The device is located in the center of the serving cell, which facilitates the correct decoding of the payload of the first type of random access by the network device.
  • the terminal device determines that the random access type is the second type of random access; at this time, it is considered that the terminal device is at the edge of the serving cell, which is not conducive to the first type of random access.
  • the access payload is correctly decoded by the network equipment; moreover, due to the large deviation of the TA value, sending the first type of random access payload will increase the uplink interference of the system.
  • the terminal device determines the access type based on the selection parameter of the random access type; or the terminal device Randomly determine the type of random access.
  • the second threshold and the third threshold are values corresponding to the TA value, and determining the random access type by the terminal device based on the selection parameter of the random access type is the same as the implementation in the foregoing embodiment, and will not be repeated here.
  • the first threshold, the second threshold, and the third threshold may be carried by a system broadcast message or RRC dedicated signaling.
  • the terminal equipment selects the random access type, it not only uses the signal strength parameter of the serving cell as a reference factor, but also uses the load of the network as a reference factor to realize the load of the first type of random access and the second type of random access. Balance not only optimizes resource utilization, but also improves the success rate of random access of terminal equipment.
  • the terminal device Take the terminal device to determine the random access type based on the resource configuration of the uplink (Up Link, UL) bandwidth part (Band with Part, BWP) and the selection parameter of the random access type as an example for description.
  • the first type of random access resources and/or the second type of random access resources can be configured on different UL BWPs. Therefore, when the terminal device initiates random access, it first determines which random access resources are configured in the currently activated UL BWP; when the currently activated UL BWP is configured with the first type of random access resources, the terminal device determines The random access type is the first type of random access.
  • the terminal device determines that the random access type is the second type of random access. In the case of currently activated and currently configured random access resources of the first type and random access resources of the second type, the terminal device determines the random access based on the selection parameters of the random access type and/or the signal strength parameters of the serving cell. Access type; or the terminal device randomly determines the random access type.
  • the terminal device determines the random access type based on the selection parameter of the random access type and/or the signal strength parameter of the serving cell, and the implementation process of determining the random access type is the same as the implementation in the foregoing embodiments, and will not be repeated here;
  • the random access type can be randomly determined from the first type of random access and the second type of random access according to the same probability.
  • the terminal device determines whether the random access type is the first type of random access or the second type of random access by taking the modulus of 2 according to its own ID.
  • the random access type is determined to be the first type of random access; when the modulus result is 1, the random access type is determined to be the second type of random access.
  • the ID may be 5G-S-TMSI used during connection establishment, I-RNTI used during connection restoration, or short MAC-I used during connection re-establishment.
  • the terminal device determines the random access type based on the resource configuration of the initial bandwidth part; it can be understood as If the activated UL BWP is not configured with the first type of random access resources and the second type of random access resources, the terminal device falls back to the initial BWP, and determines the random access type according to the resources configured on the initial BWP; if If the resources configured on the initial BWP are the first type of random access resources, the terminal device determines that the random access type is the first type of random access; if the resources configured on the initial BWP are the second type of random access resources, then The terminal device determines that the random access type is the second type of random access.
  • step S301 after step S301 is performed, the method further includes:
  • Step S302 The terminal device performs a random access process based on the determined random access type.
  • the terminal device if the terminal device fails to perform the random access procedure, the terminal device re-executes the random access procedure based on the determined random access type; or, the terminal device re-determines the random access type based on re- The determined random access type executes the random access procedure.
  • the terminal device when it re-determines the random access type, it may determine the random access type according to the random access method provided in step S301.
  • the terminal device has the ability to perform the first type of random access.
  • an embodiment of the present invention also provides a terminal device.
  • the composition structure of the terminal device is shown in FIG. 8, and the terminal device 400 includes:
  • the processing unit 401 is configured to determine the random access type based on at least one of the following: selection parameters of the random access type, signal strength parameters of the serving cell, and resource configuration of the uplink bandwidth part.
  • the terminal device further includes: a receiving unit 402 configured to receive the random access type selection parameter sent by the network device through a system broadcast message or radio resource control RRC dedicated signaling.
  • the processing unit 401 when the terminal device is in a connected state, the processing unit 401 is configured to:
  • the random access type is determined to be the first type of random access
  • the random access type is determined based on the selection parameter of the random access type and/or the signal strength parameter of the serving cell; Or randomly determine the random access type;
  • the random access type is determined based on the resource configuration of the initial bandwidth part.
  • the processing unit 401 is configured to determine that the random access type is the second type of random access when the signal strength parameter of the serving cell is less than or equal to the first threshold;
  • the random access type is determined based on the selection parameter of the random access type.
  • the processing unit 401 is configured to determine that the random access type is the first type of random access when the signal strength parameter of the serving cell is greater than or equal to a second threshold;
  • the access type is determined based on the selection parameter of the random access type; or randomly determined Random access type.
  • the first threshold, the second threshold, and the third threshold are carried by a system broadcast message or RRC dedicated signaling.
  • the processing unit 401 is configured to generate random numbers
  • the random access type is the second type of random access
  • the first selection parameter is a selection parameter of the first type of random access.
  • the processing unit 401 is configured to generate random numbers
  • the random access type is the second type of random access
  • the random access type is the first type of random access
  • the second selection parameter is a selection parameter of the second type of random access.
  • the selection parameter of the random access type is carried by a system broadcast message or RRC dedicated signaling; the selection parameter of the random access type includes: the weight parameter of the random access type, or the random access type Type of load-related parameters.
  • the signal strength parameter of the serving cell is RSRP.
  • the processing unit 401 is further configured to perform a random access procedure based on the determined random access type.
  • the processing unit 401 in the case that the processing unit 401 fails to perform the random access procedure, the processing unit 401 is further configured to re-execute the random access procedure based on the determined random access type;
  • the processing unit 401 is further configured to re-determine the random access type, and perform a random access process based on the re-determined random access type.
  • the terminal device has the ability to perform the first type of random access.
  • An embodiment of the present invention also provides a terminal device, including a processor and a memory for storing a computer program that can run on the processor, where the processor is used to execute the above-mentioned terminal device when the computer program is running. Steps of random access method.
  • the embodiment of the present invention also provides a network device.
  • the sending unit 501 is configured to send selection parameters of the random access type, where the selection parameters of the random access type are used to enable the terminal device to determine the random access type.
  • the sending unit 501 is further configured to send a first threshold, where the first threshold is used to enable the terminal device to determine the random access type in combination with the signal strength parameter of the serving cell.
  • the first threshold is carried by a system broadcast message or RRC dedicated signaling.
  • the sending unit 501 is further configured to send a second threshold and a third threshold, and the second threshold and the third threshold are used for the terminal device to determine the signal strength parameter of the serving cell. Random access type.
  • the second threshold and the third threshold are carried by a system broadcast message or RRC dedicated signaling.
  • the selection parameter of the random access type includes: a weight parameter of the random access type, or a parameter related to the load of the random access type.
  • the description of the selection parameters of the random access type is the same as the related description in the above step S301, and will not be repeated here.
  • An embodiment of the present invention also provides a network device, including a processor and a memory for storing a computer program that can run on the processor, where the processor is used to execute the above-mentioned network device when the computer program is running. Steps of random access method.
  • the electronic device 700 includes: at least one processor 701, a memory 702, and at least one network interface 704.
  • the various components in the electronic device 700 are coupled together through the bus system 705. It can be understood that the bus system 705 is used to implement connection and communication between these components.
  • the bus system 705 also includes a power bus, a control bus, and a status signal bus. However, for clarity of description, various buses are marked as the bus system 705 in FIG. 10.
  • the memory 702 may be a volatile memory or a non-volatile memory, and may also include both volatile and non-volatile memory.
  • the non-volatile memory may be ROM, Programmable Read-Only Memory (PROM), Erasable Programmable Read-Only Memory (EPROM), and electrically erasable Programmable read-only memory (EEPROM, Electrically Erasable Programmable Read-Only Memory), magnetic random access memory (FRAM, ferromagnetic random access memory), flash memory (Flash Memory), magnetic surface memory, optical disk, or CD-ROM -ROM, Compact Disc Read-Only Memory); Magnetic surface memory can be disk storage or tape storage.
  • the volatile memory may be a random access memory (RAM, Random Access Memory), which is used as an external cache.
  • RAM random access memory
  • SRAM static random access memory
  • SSRAM synchronous static random access memory
  • DRAM dynamic random access Memory
  • SDRAM Synchronous Dynamic Random Access Memory
  • DDRSDRAM Double Data Rate Synchronous Dynamic Random Access Memory
  • ESDRAM enhanced -Type synchronous dynamic random access memory
  • SLDRAM SyncLink Dynamic Random Access Memory
  • direct memory bus random access memory DRRAM, Direct Rambus Random Access Memory
  • DRRAM Direct Rambus Random Access Memory
  • the memory 702 described in the embodiment of the present invention is intended to include, but is not limited to, these and any other suitable types of memory.
  • the memory 702 in the embodiment of the present invention is used to store various types of data to support the operation of the electronic device 700. Examples of these data include: any computer program used to operate on the electronic device 700, such as the application program 7022.
  • the program for implementing the method of the embodiment of the present invention may be included in the application program 7022.
  • the method disclosed in the foregoing embodiment of the present invention may be applied to the processor 701 or implemented by the processor 701.
  • the processor 701 may be an integrated circuit chip with signal processing capabilities. In the implementation process, the steps of the foregoing method can be completed by hardware integrated logic circuits in the processor 701 or instructions in the form of software.
  • the aforementioned processor 701 may be a general-purpose processor, a digital signal processor (DSP, Digital Signal Processor), or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc.
  • the processor 701 may implement or execute various methods, steps, and logical block diagrams disclosed in the embodiments of the present invention.
  • the general-purpose processor may be a microprocessor or any conventional processor.
  • the steps of the method disclosed in the embodiments of the present invention can be directly embodied as being executed and completed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor.
  • the software module may be located in a storage medium, and the storage medium is located in the memory 702.
  • the processor 701 reads the information in the memory 702 and completes the steps of the foregoing method in combination with its hardware.
  • the electronic device 700 may be used by one or more application specific integrated circuits (ASIC, Application Specific Integrated Circuit), DSP, programmable logic device (PLD, Programmable Logic Device), and complex programmable logic device (CPLD). , Complex Programmable Logic Device), FPGA, general-purpose processor, controller, MCU, MPU, or other electronic components to implement the foregoing method.
  • ASIC Application Specific Integrated Circuit
  • DSP digital signal processor
  • PLD programmable logic device
  • CPLD complex programmable logic device
  • FPGA field-programmable Logic Device
  • controller MCU
  • MPU or other electronic components to implement the foregoing method.
  • the embodiment of the present application also provides a storage medium for storing computer programs.
  • the storage medium can be applied to the terminal device in the embodiment of the present application, and the computer program enables the computer to execute the corresponding process in each method of the embodiment of the present application.
  • the computer program enables the computer to execute the corresponding process in each method of the embodiment of the present application.
  • the storage medium may be applied to the network device in the embodiment of the present application, and the computer program causes the computer to execute the corresponding process in each method of the embodiment of the present application.
  • the computer program causes the computer to execute the corresponding process in each method of the embodiment of the present application.
  • These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device.
  • the device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.
  • These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment.
  • the instructions provide steps for implementing functions specified in a flow or multiple flows in the flowchart and/or a block or multiple blocks in the block diagram.

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Abstract

本发明公开了一种随机接入方法，包括：终端设备基于下述中的至少一项确定随机接入类型：随机接入类型的选择参数、服务小区的信号强度参数和上行带宽部分的资源配置。本发明还公开了另一种随机接入方法、终端设备、网络设备及存储介质。

Description

一种随机接入方法、设备及存储介质 技术领域
本发明涉及无线通信技术领域，尤其涉及一种随机接入方法、设备及存储介质。
背景技术
相关技术中，终端设备通过随机接入(Random Access Channel，RACH)建立与网络设备之间的无线链路。因此，终端设备如何进行随机接入才能够提高随机接入的成功率是有待解决的问题。
发明内容
为解决上述技术问题，本发明实施例提供一种随机接入方法、设备及存储介质，终端设备进行随机接入时，能够提高随机接入的成功率。
第一方面，本发明实施例提供一种随机接入方法，包括：终端设备基于下述中的至少一项确定随机接入类型：随机接入类型的选择参数、服务小区的信号强度参数和上行带宽部分的资源配置。
第二方面，本发明实施例提供一种随机接入方法，包括：网络设备发送随机接入类型的选择参数，所述随机接入类型的选择参数用于终端设备确定随机接入类型。
第三方面，本发明实施例提供一种终端设备，包括：处理单元，配置为基于下述中的至少一项确定随机接入类型：随机接入类型的选择参数、服务小区的信号强度参数和上行带宽部分的资源配置。
第四方面，本发明实施例提供一种网络设备，所述网络设备包括：
发送单元，配置为发送随机接入类型的选择参数，所述随机接入类型的选择参数用于终端设备确定随机接入类型。
第五方面，本发明实施例提供一种终端设备，包括处理器和用于存储能够在处理器上运行的计算机程序的存储器，其中，所述处理器用于运行所述计算机程序时，执行上述终端设备执行的随机接入方法的步骤。
第六方面，本发明实施例提供一种网络设备，包括处理器和用于存储能够在处理器上运行的计算机程序的存储器，其中，所述处理器用于运行所述计算机程序时，执行上 述网络设备执行的随机接入方法的步骤。
第七方面，本发明实施例提供一种存储介质，存储有可执行程序，所述可执行程序被处理器执行时，实现上述终端设备执行的随机接入方法。
第八方面，本发明实施例提供一种存储介质，存储有可执行程序，所述可执行程序被处理器执行时，实现上述网络设备执行的随机接入方法。
本发明实施例提供的随机接入方法，包括：终端设备基于随机接入类型的选择参数，或者基于服务小区的信号强度参数和随机接入类型的选择参数，或者基于上行带宽部分的资源配置和随机接入类型的选择参数，或者基于上行带宽部分的资源配置、服务小区的信号强度参数和随机接入类型的选择参数确定随机接入类型。由于随机接入类型的选择参数与随机接入类型的负荷相关，使得终端设备在选择随机接入类型时，能够以网络的负载情况作为参考因素，实现了第一类随机接入和第二类随机接入的负载均衡，不仅优化了资源利用率，而且提高了终端设备随机接入的成功率。
附图说明
图1为本发明第二类随机接入的处理流程示意图；
图2为本发明RAR的结构示意图；
图3a为本发明subheader的一种格式示意图；
图3b为本发明subheader的另一种格式示意图；
图4为本发明由RAR组成的MAC PDU的结构示意图；
图5为本发明第一类随机接入的处理流程示意图
图6为本发明实施例通信系统的组成结构示意图；
图7为本发明实施例提供的随机接入方法的可选处理流程示意图；
图8为本发明实施例提供的终端设备的组成结构示意图；
图9为本发明实施例提供的网络设备的组成结构示意图；
图10为本发明实施例电子设备的硬件组成结构示意图。
具体实施方式
为了能够更加详尽地了解本发明实施例的特点和技术内容，下面结合附图对本发明实施例的实现进行详细阐述，所附附图仅供参考说明之用，并非用来限定本发明实施例。
在对本发明实施例提供的随机接入方法进行详细说明之前，先对第一类随机接入和 第二类随机接入分别进行简要说明。
在新无线(New Radio，NR)系统中，RACH包括：第一类随机接入和第二类随机接入。其中，第一类随机接入中，终端设备与网络设备之间需要执行2次信息交互，因此，第一类随机接入也称为两步随机接入(2-steps RACH)。第二类随机接入中，终端设备与网络设备之间需要执行4次信息交互；因此，第二类随机接入也称为四步随机接入(4-steps RACH)。按照随机接入方式的不同，随机接入包括基于竞争的随机接入和基于非竞争的随机接入。按照随机接入类型的不同，随机接入包括第一类随机接入和第二类随机接入。下面对第一类随机接入和第二类随机接入分别进行简要说明。
第二类随机接入的处理流程，如图1所示，包括如下四个步骤：
步骤S101，终端设备通过消息1(message 1，Msg1)向网络设备发送随机接入Preamble。
终端设备在选择的PRACH时域资源上发送选择的Preamble；网络设备根据Preamble能够估算上行Timing以及终端设备传输Msg3所需要的上行授权的大小。
步骤S102，网络设备检测到有终端设备发送Preamble之后，通过Msg2向终端设备发送随机接入响应(Random Access Response,RAR)消息，以告知终端设备在发送Msg3时可以使用的上行资源信息，为终端设备分配临时的无线网络临时标识(Radio Network Tempory Identity，RNTI)，为终端设备提供time advance command等。
终端设备在发送Msg1之后，开启一个RAR窗口，在RAR窗口内检测PDCCH；检测到的PDCCH用RA-RNTI加扰，RA-RNTI的计算公式如下述所示：
RA-RNTI＝1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id；
根据上述公式可知，RA-RNTI与PRACH时频资源有关。
RAR的结构示意图，如图2所示，RAR包括子报头(subheader)、RAPID、payload、上行(UpLinkUL)授权(grant)和Temporary C-RNTI；其中，subheader的格式示意图，如图3a和图3b所示，其中，BI用于指示重传Msg1的回退时间。由RAR组成的媒体接入控制协议数据单元(Media Access Control Protocol Data Unit，MAC PDU)的结构示意图，如图4所示，一个RAP ID对应一个MAC RAR。
步骤S103，终端设备接收到RAR消息之后，在RAR消息所指定的上行资源中发送Msg3。
其中，Msg3的消息主要用于通知网络设备该RACH过程是由什么事件触发。举例来说，如果是初始随机接入事件，则在Msg3中会携带终端设备ID和establishment cause； 如果是RRC重建事件，则在Msg3中会携带连接态的终端设备标识和establishment cause。
同时，Msg3携带的ID可以是的竞争冲突在步骤S104中得到解决。
步骤S104，网络设备向终端设备发送Msg4，Msg4中包括竞争解决消息，同时为终端设备分配上行传输资源。
终端设备接收到网络设备发送的Msg4时，会检测终端设备在Msg3发送的终端设备特定临时标识是否包含在基站发送的竞争解决消息中，若包含则表明终端设备随机接入过程成功，否则认为随机过程失败，终端设备需要再次从第一步开始发起随机接入过程。
Msg4的另一个作用是向终端设备发送无线资源控制(Radio Resource Control，RRC)配置消息。
竞争冲突解决包括两种方式；其中，第一种方式是：如果终端设备在Msg3中携带了小区无线网络临时标识(Cell Radio Network Tempory Identity，C-RNTI)，则Msg4用C-RNTI加扰的物理下行控制信道(Physical Downlink Control Channel，PDCCH)调度。第二种方式是：如果终端设备在Msg3中没有携带C-RNTI，如终端设备是初始接入，则Msg4用TC-RNTI加扰的PDCCH调度；冲突的解决是通过终端设备接收Msg4的物理下行共享信道(Physical Downlink Shared Channel，PDSCH)，匹配PDSCH中的公共逻辑信道(Common Control Channel，CCCH)服务数据单元(Service Data Unit，SDU)实现。
第二类随机接入中Msg1、Msg2、Msg3和Msg4所携带的消息内容，如表1所示。
Figure PCTCN2019082136-appb-000001
Figure PCTCN2019082136-appb-000002
表1
上述RACH过程需要经过网络设备与终端设备进行四次信息交互来完成，导致RACH过程的时延长；为解决RACH过程时延长的问题，提出第一类随机接入，第一类随机接入的处理流程，如图5所示，包括以下步骤：
步骤S201，终端设备向网络设备发送MsgA。
MsgA由Preamble和payload组成。可选地，Preamble与第二类随机接入中的Preamble相同，该Preamble在PRACH资源上传输；payload携带的信息与第二类随机接入中Msg3中的信息相同，比如RRC处于空闲态时的RRC信令，以及RRC处于连接态时的C-RNTI，payload可由物理上行共享信道(Physical Uplink Shared Channel， PUSCH)传输。
网络设备接收MsgA的结果可能包括如下两种：第一种，网络设备成功解码出一个或多个Preamble；第二种，网络设备成功解码出一个或多个Preamble，以及一个或多个payload。
步骤S202，终端设备接收网络设备发送的MsgB。
可选地，MsgB包括第二类随机接入中Msg2和Msg4的内容。
针对上述第一类随机接入和第二类随机接入同时存在的情况，具有第一类随机接入能力的终端设备基于接收的目标功率或者服务小区的参考信号接收功率(Reference Signal Receiving Power，RSRP)来判断选择第一类随机接入或者选择第二类随机接入。如当接收的目标功率大于功率门限值，或者当服务小区的RSRP大于RSRP门限值时，终端设备选择第一类随机接入。
但是，这种方案没有考虑小区分布的问题；例如，当大量的具有第一类随机接入能力的终端设备聚集在小区中心时，对于这些终端设备来说，其服务小区的RSRP一定满足RSRP门限，这些终端设备均选择进行第一类随机接入；这将导致第一类随机接入资源的负荷过载，以及导致更多的竞争冲突；进而导致更高的随机接入失败概率以及更长的随机接入时延；并且，更高的随机接入失败概率将导致更多的消息重传，将进一步加重随机接入资源过载的情况。因此，具有两步随机接入能力的终端设备如何选择随机接入类型，才能够兼顾网络的负载均衡目前尚无有效解决方案。
基于上述问题，本发明提供一种随机接入方法，本申请实施例的随机接入方法可以应用于各种通信系统，例如：全球移动通讯(Global System of Mobile communication，GSM)系统、码分多址(Code Division Multiple Access，CDMA)系统、宽带码分多址(Wideband Code Division Multiple Access，WCDMA)系统、通用分组无线业务(General Packet Radio Service，GPRS)、长期演进(Long Term Evolution，LTE)系统、LTE频分双工(Frequency Division Duplex，FDD)系统、LTE时分双工(Time Division Duplex，TDD)、通用移动通信系统(Universal Mobile Telecommunication System，UMTS)、全球互联微波接入(Worldwide Interoperability for Microwave Access，WiMAX)通信系统或5G系统等。
示例性的，本申请实施例应用的通信系统100，如图6所示。该通信系统100可以包括网络设备110，网络设备110可以是与终端设备120(或称为通信终端、终端)通信的设备。网络设备110可以为特定的地理区域提供通信覆盖，并且可以与位于该覆盖 区域内的终端设备进行通信。可选地，该网络设备110可以是GSM系统或CDMA系统中的基站(Base Transceiver Station，BTS)，也可以是WCDMA系统中的基站(NodeB，NB)，还可以是LTE系统中的演进型基站(Evolutional Node B，eNB或eNodeB)，还可以是NR/5G系统中的基站(gNB)，或者是云无线接入网络(Cloud Radio Access Network，CRAN)中的无线控制器，或者该网络设备可以为移动交换中心、中继站、接入点、车载设备、可穿戴设备、集线器、交换机、网桥、路由器、5G网络中的网络侧设备或者未来演进的公共陆地移动网络(Public Land Mobile Network，PLMN)中的网络设备等。
该通信系统100还包括位于网络设备110覆盖范围内的至少一个终端设备120。作为在此使用的“终端设备”包括但不限于经由有线线路连接，如经由公共交换电话网络(Public Switched Telephone Networks，PSTN)、数字用户线路(Digital Subscriber Line，DSL)、数字电缆、直接电缆连接；和/或另一数据连接/网络；和/或经由无线接口，如，针对蜂窝网络、无线局域网(Wireless Local Area Network，WLAN)、诸如DVB-H网络的数字电视网络、卫星网络、AM-FM广播发送器；和/或另一终端设备的被设置成接收/发送通信信号的装置；和/或物联网(Internet of Things，IoT)设备。被设置成通过无线接口通信的终端设备可以被称为“无线通信终端”、“无线终端”或“移动终端”。移动终端的示例包括但不限于卫星或蜂窝电话；可以组合蜂窝无线电电话与数据处理、传真以及数据通信能力的个人通信系统(Personal Communications System，PCS)终端；可以包括无线电电话、寻呼机、因特网/内联网接入、Web浏览器、记事簿、日历以及/或全球定位系统(Global Positioning System，GPS)接收器的PDA；以及常规膝上型和/或掌上型接收器或包括无线电电话收发器的其它电子装置。终端设备可以指接入终端、用户设备(User Equipment，UE)、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置。接入终端可以是蜂窝电话、无绳电话、会话启动协议(Session Initiation Protocol，SIP)电话、无线本地环路(Wireless Local Loop，WLL)站、个人数字处理(Personal Digital Assistant，PDA)、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、5G网络中的终端设备或者未来演进的PLMN中的终端设备等。
可选地，终端设备120之间可以进行终端直连(Device to Device，D2D)通信。
可选地，5G系统或5G网络还可以称为新无线(New Radio，NR)系统或NR网络。
图6示例性地示出了一个网络设备和两个终端设备，可选地，该通信系统100可以 包括多个网络设备并且每个网络设备的覆盖范围内可以包括其它数量的终端设备，本申请实施例对此不做限定。
可选地，该通信系统100还可以包括网络控制器、移动管理实体等其他网络实体，本申请实施例对此不作限定。
应理解，本申请实施例中网络/系统中具有通信功能的设备可称为通信设备。以图6示出的通信系统100为例，通信设备可包括具有通信功能的网络设备110和终端设备120，网络设备110和终端设备120可以为上文所述的具体设备，此处不再赘述；通信设备还可包括通信系统100中的其他设备，例如网络控制器、移动管理实体等其他网络实体，本申请实施例中对此不做限定。
本发明实施例提供的随机接入方法的一种可选处理流程，如图7所示，包括以下步骤：
步骤S301，终端设备基于下述中的至少一项确定随机接入类型：随机接入类型的选择参数、服务小区的信号强度参数和上行带宽部分的资源配置。
本发明实施例中，终端设备在执行步骤S301之前，终端设备需要先接收网络设备通过系统消息或RRC专用信令发送的随机接入类型的选择参数。
以终端设备基于随机接入类型的选择参数确定随机接入类型为例进行说明。随机接入类型选择参数包括随机接入类型的权重参数，或与随机接入类型的负荷相关的参数。其中，随机接入类型的选择参数可以是当前的第一类随机接入类型的权重参数和当前的第二类随机接入类型的权重参数；随机接入类型的选择参数也可以是与随机接入类型的负荷相关的参数。可选地，与随机接入类型的负荷相关的参数通过服务小区内进行第一类随机接入的终端设备数量X与服务小区内进行第二类随机接入的终端数量Y决定；与第一类随机接入类型的负荷相关的参数值等于Y/(X+Y)，与第二类随机接入类型的负荷相关的参数值等于X/(X+Y)。如第一类随机接入类型的负荷高，那么与第一类随机接入类型的负荷相关的参数值则低，反之亦然。
当终端设备基于随机接入类型的选择参数确定随机接入类型时，终端设备首先生成一个随机数，通过随机数与随机接入类型的选择参数进行比较来选择随机接入类型；可选地，所述终端设备可按照均匀分布生成0到1之间的一个随机数。在一些实施例中，以随机接入类型选择参数为第一类随机接入对应的第一选择参数为例，在随机数小于第一选择参数的情况下，所述终端设备确定随机接入类型为第一类随机接入；在所述随机数大于或等于所述第一选择参数的情况下，所述终端设备确定随机接入类型为第二类随 机接入。如第一类随机接入对应的第一选择参数为0.5，若终端设备生成的随机数为0.2，则终端设备确定随机接入类型为第一类随机接入；若终端设备生成的随机数为0.6，则终端设备确定随机接入类型为第二类随机接入。在另一些实施例中，以随机接入类型选择参数为第二类随机接入对应的第二选择参数为例，在所述随机数大于第二选择参数的情况下，所述终端设备确定随机接入类型为第二类随机接入；在所述随机数小于或等于所述第二选择参数的情况下，所述终端设备确定随机接入类型为第一类随机接入。如第二类随机接入对应的第二选择参数为0.6，若终端设备生成的随机数为0.5，则终端设备确定随机接入类型为第一类随机接入；若终端设备生成的随机数为0.7，则终端设备确定随机接入类型为第二类随机接入。
可选地，所述随机接入类型的选择参数通过系统广播消息或RRC专用信令承载。所述随机接入类型的选择参数通过系统广播消息承载时，网络设备通过系统消息SIB广播随机接入类型的选择参数，以供空闲(idle)状态、去激活(inactive)状态、以及连接(connected)状态下的终端设备使用。所述随机接入类型的选择参数通过RRC专用信令承载时，所述RRC专用信令可以是RRC连接建立消息、RRC连接重建消息、RRC连接恢复消息、或者RRC连接重配置消息等；所述RRC专用信令中携带随机接入类型的选择参数，以供connected状态下的终端设备在触发随机接入过程时选择随机接入类型。所述随机接入类型的选择参数通过RRC专用信令承载时，所述RRC专用信令还可以是RRC连接释放消息，所述RRC连接释放消息中携带随机接入类型的选择参数，以供idle状态以及inactive状态下的终端设备选择随机接入类型。
本发明实施例中，由于随机接入类型的选择参数与随机接入类型的负荷相关，使得终端设备在选择随机接入类型时，能够以网络的负载情况作为参考因素，实现了第一类随机接入和第二类随机接入的负载均衡，不仅优化了资源利用率，而且提高了终端设备随机接入的成功率。
以终端设备基于服务小区的信号强度参数和随机接入类型的选择参数确定随机接入类型为例进行说明；可选地，服务小区的信号强度参数为RSRP；所述服务小区的信号强度参数还可以是RSRQ、或者信号与干扰加噪声比(Signal to Interference plus Noise Ratio，SINR)、或者时间提前量(Timing Advanced，TA)值、或者终端设备接收的目标功率(Received Target Power)，或者所述服务小区的信号强度参数为其他能够表征服务小区的信号强度的参数。下面以服务小区的信号强度参数为RSRP为例，在服务小区的RSRP小于或等于第一阈值的情况下，所述终端设备确定随机接入类型为第二类随机 接入；在服务小区的RSRP大于第一阈值的情况下，所述终端设备基于所述随机接入类型的选择参数，确定随机接入类型。这里，终端设备基于所述随机接入类型的选择参数确定随机接入类型与上述实施例中的实现方式相同，这里不再赘述。
再以服务小区的信号强度参数为Received Target Power为例，在Received Target Power小于或等于第一阈值的情况下，所述终端设备确定随机接入类型为第二类随机接入；在Received Target Power大于第一阈值的情况下，所述终端设备基于所述随机接入类型的选择参数，确定随机接入类型。这里，终端设备基于所述随机接入类型的选择参数确定随机接入类型与上述实施例中的实现方式相同，这里不再赘述。
再以服务小区的信号强度参数为TA为例，在TA值小于或等于第一阈值的情况下，所述终端设备确定随机接入类型为第一类随机接入；在TA值大于第一阈值的情况下，所述终端设备基于所述随机接入类型的选择参数，确定随机接入类型。这里，终端设备基于所述随机接入类型的选择参数确定随机接入类型与上述实施例中的实现方式相同，这里不再赘述。
以终端设备基于服务小区的信号强度参数和随机接入类型的选择参数确定随机接入类型为例进行说明；可选地，服务小区的信号强度参数为RSRP；所述服务小区的信号强度参数还可以是RSRQ、或者SINR、或者TA值、或者Received Target Power，或者所述服务小区的信号强度参数为其他能够表征服务小区的信号强度的参数。下面以服务小区的信号强度参数为RSRP为例，在服务小区的RSRP大于或等于第二阈值的情况下，所述终端设备确定随机接入类型为第一类随机接入；此时，认为所述终端设备处于服务小区的中心，TA值较小或者接近于0，有利于第一类随机接入的载荷(payload)被网络设备正确解码。在所述服务小区的RSRP小于所述第三阈值的情况下，所述终端设备确定随机接入类型为第二类随机接入；此时，认为所述终端设备处于服务小区的边缘，TA值较大，不利于第一类随机接入的payload被网络设备正确解码；而且，由于TA值偏差较大，发送第一类随机接入的payload将会增加系统的上行干扰。在所述服务小区的RSRP大于或等于所述第三阈值、且小于所述第二阈值的情况下，所述终端设备基于所述随机接入类型的选择参数，确定所述接入类型；或者所述终端设备随机确定随机接入类型。这里，第二阈值和第三阈值是与RSRP对应的值，终端设备基于所述随机接入类型的选择参数确定随机接入类型与上述实施例中的实现方式相同，这里不再赘述。终端设备随机确定随机接入类型时，可以按照相同的概率从第一类随机接入和第二类随机接入中随机确定一种接入类型。
再以服务小区的信号强度参数为Received Target Power为例，在Received Target Power大于或等于第二阈值的情况下，所述终端设备确定随机接入类型为第一类随机接入；此时，认为所述终端设备处于服务小区的中心，TA值较小或者接近于0，有利于第一类随机接入的载荷(payload)被网络设备正确解码。在Received Target Power小于所述第三阈值的情况下，所述终端设备确定随机接入类型为第二类随机接入；此时，认为所述终端设备处于服务小区的边缘，TA值较大，不利于第一类随机接入的payload被网络设备正确解码；而且，由于TA值偏差较大，发送第一类随机接入的payload将会增加系统的上行干扰。在Received Target Power大于或等于所述第三阈值、且小于所述第二阈值的情况下，所述终端设备基于所述随机接入类型的选择参数，确定所述接入类型；或者所述终端设备随机确定随机接入类型。这里，第二阈值和第三阈值是与Received Target Power对应的值，终端设备基于所述随机接入类型的选择参数确定随机接入类型与上述实施例中的实现方式相同，这里不再赘述。终端设备随机确定随机接入类型时，可以按照相同的概率从第一类随机接入和第二类随机接入中随机确定一种接入类型。或者，终端设备随机确定随机接入类型时，终端设备根据自身的标识(Identifier，ID)对2取模来决定确定随机接入类型为第一类随机接入或第二类随机接入。当取模结果为0时，确定随机接入类型为第一类随机接入；当取模结果为1时，确定随机接入类型为第二类随机接入。其中，所述ID可以是连接建立时使用的5G系统结构演进临时移动用户标识(System Architecture Evolution Temporary Mobile Subscriber Identity，S-TMSI)，也可以是连接恢复过程中使用的去激活的无线网络临时标识(Inactive Radio Network Tempory Identity，I-RNTI)，还可以是连接重建过程中使用的short MAC-I。
再以服务小区的信号强度参数为TA为例，在TA值小于或等于第二阈值的情况下，所述终端设备确定随机接入类型为第一类随机接入；此时，认为所述终端设备处于服务小区的中心，有利于第一类随机接入的载荷(payload)被网络设备正确解码。在TA值大于所述第三阈值的情况下，所述终端设备确定随机接入类型为第二类随机接入；此时，认为所述终端设备处于服务小区的边缘，不利于第一类随机接入的payload被网络设备正确解码；而且，由于TA值偏差较大，发送第一类随机接入的payload将会增加系统的上行干扰。在TA值大于或等于所述第二阈值、且小于所述第三阈值的情况下，所述终端设备基于所述随机接入类型的选择参数，确定所述接入类型；或者所述终端设备随机确定随机接入类型。这里，第二阈值和第三阈值是与TA值对应的值，终端设备基于所述随机接入类型的选择参数确定随机接入类型与上述实施例中的实现方式相同，这里 不再赘述。
本发明上述实施例中，第一阈值、第二阈值和第三阈值可通过系统广播消息或RRC专用信令承载。终端设备在选择随机接入类型时，不仅以服务小区的信号强度参数作为参考因素，还能够以网络的负载情况作为参考因素，实现了第一类随机接入和第二类随机接入的负载均衡，不仅优化了资源利用率，而且提高了终端设备随机接入的成功率。
以终端设备基于上行(Up Link，UL)带宽部分(Bandwith Part，BWP)的资源配置和随机接入类型的选择参数确定随机接入类型为例进行说明。对于连接态的终端设备，可以通过在不同的UL BWP上配置第一类随机接入的资源和/或第二类随机接入的资源。因此，终端设备在发起随机接入时，首先判断当前激活的UL BWP配置了哪些随机接入资源；在当前激活的UL BWP配置了第一类随机接入资源的情况下，所述终端设备确定随机接入类型为第一类随机接入。在当前激活的UL BWP配置第二类随机接入资源的情况下，所述终端设备确定随机接入类型为第二类随机接入。在当前激活的当前配置第一类随机接入资源和第二类随机接入资源的情况下，所述终端设备基于随机接入类型的选择参数和/或服务小区的信号强度参数，确定随机接入类型；或者所述终端设备随机确定随机接入类型。这里，终端设备基于随机接入类型的选择参数和/或服务小区的信号强度参数，确定随机接入类型的实现过程与上述各实施例中的实现方式相同，这里不再赘述；终端设备随机确定随机接入类型时，可以按照相同的概率从第一类随机接入和第二类随机接入中随机确定一种接入类型。或者，终端设备随机确定随机接入类型时，终端设备根据自身的ID对2取模来决定确定随机接入类型为第一类随机接入或第二类随机接入。当取模结果为0时，确定随机接入类型为第一类随机接入；当取模结果为1时，确定随机接入类型为第二类随机接入。其中，所述ID可以是连接建立时使用的5G-S-TMSI，也可以是连接恢复过程中使用的I-RNTI，还可以是连接重建过程中使用的short MAC-I。在当前激活的UL BWP未配置第一类随机接入资源和第二类随机接入资源的情况下，所述终端设备基于初始带宽部分的资源配置确定随机接入类型；可以理解为，在当前激活的UL BWP未配置第一类随机接入资源和第二类随机接入资源的情况下，所述终端设备回退到初始BWP上，根据初始BWP上配置的资源确定随机接入类型；如果初始BWP上配置的资源为第一类随机接入的资源，则终端设备确定随机接入类型为第一类随机接入；如果初始BWP上配置的资源为第二类随机接入的资源，则终端设备确定随机接入类型为第二类随机接入。
在一些实施例中，在执行步骤S301之后，所述方法还包括：
步骤S302，终端设备基于所确定的随机接入类型执行随机接入过程。
在具体实施时，若终端设备执行随机接入过程失败时，所述终端设备基于所确定的随机接入类型重新执行随机接入过程；或者，所述终端设备重新确定随机接入类型，基于重新确定的随机接入类型执行随机接入过程。
其中，终端设备重新确定随机接入类型时，可以按照步骤S301中提供的随机接入方法确定随机接入类型。
需要说明的是，本发明上述各实施例中，所述终端设备具有执行第一类随机接入的能力。
为实现上述随机接入方法，本发明实施例还提供一种终端设备，所述终端设备的组成结构，如图8所示，终端设备400包括：
处理单元401，配置为基于下述中的至少一项确定随机接入类型：随机接入类型的选择参数、服务小区的信号强度参数和上行带宽部分的资源配置。
本发明实施例中，所述终端设备还包括：接收单元402，配置为接收网络设备通过系统广播消息或无线资源控制RRC专用信令发送的随机接入类型的选择参数。
本发明实施例中，所述终端设备处于连接态时，所述处理单元401配置为：
在激活的上行带宽部分配置第一类随机接入资源的情况下，确定随机接入类型为第一类随机接入；
在激活的上行带宽部分配置第二类随机接入资源的情况下，确定随机接入类型为第二类随机接入；
在激活的上行带宽部分配置第一类随机接入资源和第二类随机接入资源的情况下，基于随机接入类型的选择参数和/或服务小区的信号强度参数，确定随机接入类型；或者随机确定随机接入类型；
在激活的上行带宽部分未配置第一类随机接入资源和第二类随机接入资源的情况下，基于初始带宽部分的资源配置确定随机接入类型。
本发明实施例中，所述处理单元401，配置为在所述服务小区的信号强度参数小于或等于第一阈值的情况下，确定随机接入类型为第二类随机接入；
在所述服务小区的信号强度参数大于所述第一阈值的情况下，基于所述随机接入类型的选择参数，确定随机接入类型。
本发明实施例中，所述处理单元401，配置为在所述服务小区的信号强度参数大于或等于第二阈值的情况下，确定随机接入类型为第一类随机接入；
在所述服务小区的信号强度参数小于所述第三阈值的情况下，确定随机接入类型为第二类随机接入；
在所述服务小区的信号强度参数大于或等于所述第三阈值、且小于所述第二阈值的情况下，基于所述随机接入类型的选择参数，确定所述接入类型；或者随机确定随机接入类型。
本发明实施例中，所述第一阈值、所述第二阈值和所述第三阈值通过系统广播消息或RRC专用信令承载。
本发明实施例中，所述处理单元401，配置为生成随机数；
在所述随机数小于第一选择参数的情况下，确定随机接入类型为第一类随机接入；
在所述随机数大于或等于所述第一选择参数的情况下，确定随机接入类型为第二类随机接入；
所述第一选择参数为第一类随机接入的选择参数。
本发明实施例中，所述处理单元401，配置为生成随机数；
在所述随机数大于第二选择参数的情况下，确定随机接入类型为第二类随机接入；
在所述随机数小于或等于所述第二选择参数的情况下，确定随机接入类型为第一类随机接入；
所述第二选择参数为第二类随机接入的选择参数。
本发明实施例中，所述随机接入类型的选择参数通过系统广播消息或RRC专用信令承载；所述随机接入类型的选择参数包括：随机接入类型的权重参数，或与随机接入类型的负荷相关的参数。所述服务小区的信号强度参数为RSRP。
本发明实施例中，所述处理单元401，还配置为基于所确定的随机接入类型执行随机接入过程。
本发明实施例中，在所述处理单元401执行随机接入过程失败的情况下，所述处理单元401，还配置为基于所确定的随机接入类型重新执行随机接入过程；
或者，所述处理单元401，还配置为重新确定随机接入类型，基于重新确定的随机接入类型执行随机接入过程。
本发明实施例中，所述终端设备具有执行第一类随机接入的能力。
本发明实施例还提供一种终端设备，包括处理器和用于存储能够在处理器上运行的计算机程序的存储器，其中，所述处理器用于运行所述计算机程序时，执行上述终端设备执行的随机接入方法的步骤。
本发明实施例还提供一种网络设备，所述网络设备的组成结构示意图，如图9所示，网络设备500包括：
发送单元501，配置为发送随机接入类型的选择参数，所述随机接入类型的选择参数用于使终端设备确定随机接入类型。
本发明实施例中，所述发送单元501，还配置为发送第一阈值，所述第一阈值用于使所述终端设备结合服务小区的信号强度参数确定随机接入类型。其中，所述第一阈值通过系统广播消息或RRC专用信令承载。
本发明实施例中，所述发送单元501，还配置为发送第二阈值和第三阈值，所述第二阈值和所述第三阈值用于使所述终端设备结合服务小区的信号强度参数确定随机接入类型。其中，所述第二阈值和所述第三阈值通过系统广播消息或RRC专用信令承载。
本发明实施例中，所述随机接入类型的选择参数包括：随机接入类型的权重参数，或与随机接入类型的负荷相关的参数。其中，针对所述随机接入类型的选择参数的说明，与上述步骤S301中的相关说明相同，这里不再赘述。
本发明实施例还提供一种网络设备，包括处理器和用于存储能够在处理器上运行的计算机程序的存储器，其中，所述处理器用于运行所述计算机程序时，执行上述网络设备执行的随机接入方法的步骤。
图10是本发明实施例的电子设备(终端设备和网络设备)的硬件组成结构示意图，电子设备700包括：至少一个处理器701、存储器702和至少一个网络接口704。电子设备700中的各个组件通过总线系统705耦合在一起。可理解，总线系统705用于实现这些组件之间的连接通信。总线系统705除包括数据总线之外，还包括电源总线、控制总线和状态信号总线。但是为了清楚说明起见，在图10中将各种总线都标为总线系统705。
可以理解，存储器702可以是易失性存储器或非易失性存储器，也可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是ROM、可编程只读存储器(PROM，Programmable Read-Only Memory)、可擦除可编程只读存储器(EPROM，Erasable Programmable Read-Only Memory)、电可擦除可编程只读存储器(EEPROM，Electrically Erasable Programmable Read-Only Memory)、磁性随机存取存储器(FRAM，ferromagnetic random access memory)、快闪存储器(Flash Memory)、磁表面存储器、光盘、或只读光盘(CD-ROM，Compact Disc Read-Only Memory)；磁表面存储器可以是磁盘存储器或磁带存储器。易失性存储器可以是随机存取存储器(RAM，Random Access Memory)， 其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的RAM可用，例如静态随机存取存储器(SRAM，Static Random Access Memory)、同步静态随机存取存储器(SSRAM，Synchronous Static Random Access Memory)、动态随机存取存储器(DRAM，Dynamic Random Access Memory)、同步动态随机存取存储器(SDRAM，Synchronous Dynamic Random Access Memory)、双倍数据速率同步动态随机存取存储器(DDRSDRAM，Double Data Rate Synchronous Dynamic Random Access Memory)、增强型同步动态随机存取存储器(ESDRAM，Enhanced Synchronous Dynamic Random Access Memory)、同步连接动态随机存取存储器(SLDRAM，SyncLink Dynamic Random Access Memory)、直接内存总线随机存取存储器(DRRAM，Direct Rambus Random Access Memory)。本发明实施例描述的存储器702旨在包括但不限于这些和任意其它适合类型的存储器。
本发明实施例中的存储器702用于存储各种类型的数据以支持电子设备700的操作。这些数据的示例包括：用于在电子设备700上操作的任何计算机程序，如应用程序7022。实现本发明实施例方法的程序可以包含在应用程序7022中。
上述本发明实施例揭示的方法可以应用于处理器701中，或者由处理器701实现。处理器701可能是一种集成电路芯片，具有信号的处理能力。在实现过程中，上述方法的各步骤可以通过处理器701中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器701可以是通用处理器、数字信号处理器(DSP，Digital Signal Processor)，或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。处理器701可以实现或者执行本发明实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者任何常规的处理器等。结合本发明实施例所公开的方法的步骤，可以直接体现为硬件译码处理器执行完成，或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于存储介质中，该存储介质位于存储器702，处理器701读取存储器702中的信息，结合其硬件完成前述方法的步骤。
在示例性实施例中，电子设备700可以被一个或多个应用专用集成电路(ASIC，Application Specific Integrated Circuit)、DSP、可编程逻辑器件(PLD，Programmable Logic Device)、复杂可编程逻辑器件(CPLD，Complex Programmable Logic Device)、FPGA、通用处理器、控制器、MCU、MPU、或其他电子元件实现，用于执行前述方法。
本申请实施例还提供了一种存储介质，用于存储计算机程序。
可选的，该存储介质可应用于本申请实施例中的终端设备，并且该计算机程序使得 计算机执行本申请实施例的各个方法中的相应流程，为了简洁，在此不再赘述。
可选的，该存储介质可应用于本申请实施例中的网络设备，并且该计算机程序使得计算机执行本申请实施例的各个方法中的相应流程，为了简洁，在此不再赘述。
本发明是参照根据本发明实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
以上所述，仅为本发明的较佳实施例而已，并非用于限定本发明的保护范围，凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明的保护范围之内。

Claims (48)

  1. 一种随机接入方法，所述方法包括：
    终端设备基于下述中的至少一项确定随机接入类型：
    随机接入类型的选择参数、服务小区的信号强度参数和上行带宽部分的资源配置。
  2. 根据权利要求1所述的方法，其中，所述方法还包括：
    所述终端设备接收网络设备通过系统广播消息或无线资源控制RRC专用信令发送的随机接入类型的选择参数。
  3. 根据权利要求1或2所述的方法，其中，所述确定随机接入类型，包括：
    在激活的上行带宽部分配置第一类随机接入资源的情况下，所述终端设备确定随机接入类型为第一类随机接入；
    在激活的上行带宽部分配置第二类随机接入资源的情况下，所述终端设备确定随机接入类型为第二类随机接入；
    在激活的上行带宽部分配置第一类随机接入资源和第二类随机接入资源的情况下，所述终端设备基于随机接入类型的选择参数和/或服务小区的信号强度参数，确定随机接入类型；或者所述终端设备随机确定随机接入类型；
    在激活的上行带宽部分未配置第一类随机接入资源和第二类随机接入资源的情况下，所述终端设备基于初始带宽部分的资源配置确定随机接入类型。
  4. 根据权利要求3所述的方法，其中，所述终端设备处于连接态。
  5. 根据权利要求1至4任一项所述的方法，其中，所述确定随机接入类型，包括：
    在所述服务小区的信号强度参数小于或等于第一阈值的情况下，所述终端设备确定随机接入类型为第二类随机接入；
    在所述服务小区的信号强度参数大于所述第一阈值的情况下，所述终端设备基于所述随机接入类型的选择参数，确定随机接入类型。
  6. 根据权利要求5所述的方法，其中，所述第一阈值通过系统广播消息或RRC专用信令承载。
  7. 根据权利要求1至4任一项所述的方法，其中，所述确定随机接入类型，包括：
    在所述服务小区的信号强度参数大于或等于第二阈值的情况下，所述终端设备确定随机接入类型为第一类随机接入；
    在所述服务小区的信号强度参数小于所述第三阈值的情况下，所述终端设备确定随 机接入类型为第二类随机接入；
    在所述服务小区的信号强度参数大于或等于所述第三阈值、且小于所述第二阈值的情况下，所述终端设备基于所述随机接入类型的选择参数，确定所述接入类型；或者所述终端设备随机确定随机接入类型。
  8. 根据权利要求7所述的方法，其中，所述第二阈值和所述第三阈值通过系统广播消息或RRC专用信令承载。
  9. 根据权利要求1至8任一项所述的方法，其中，所述确定随机接入类型，包括：
    所述终端设备生成随机数；
    在所述随机数小于第一选择参数的情况下，所述终端设备确定随机接入类型为第一类随机接入；
    在所述随机数大于或等于所述第一选择参数的情况下，所述终端设备确定随机接入类型为第二类随机接入；
    所述第一选择参数为第一类随机接入的选择参数。
  10. 根据权利要求1至8任一项所述的方法，其中，所述确定随机接入类型，包括：
    所述终端设备生成随机数；
    在所述随机数大于第二选择参数的情况下，所述终端设备确定随机接入类型为第二类随机接入；
    在所述随机数小于或等于所述第二选择参数的情况下，所述终端设备确定随机接入类型为第一类随机接入；
    所述第二选择参数为第二类随机接入的选择参数。
  11. 根据权利要求1至10任一项所述的方法，其中，所述随机接入类型的选择参数包括：
    随机接入类型的权重参数，或与随机接入类型的负荷相关的参数。
  12. 根据权利要求1至11任一项所述的方法，其中，所述服务小区的信号强度参数为参考信号接收功率RSRP。
  13. 根据权利要求1至12任一项所述的方法，其中，所述方法还包括：
    所述终端设备基于所确定的随机接入类型执行随机接入过程。
  14. 根据权利要求13所述的方法，其中，所述终端设备执行随机接入过程失败的情况下，所述方法还包括：
    所述终端设备基于所确定的随机接入类型重新执行随机接入过程；
    或者，所述终端设备重新确定随机接入类型，基于重新确定的随机接入类型执行随机接入过程。
  15. 根据权利要求1至14任一项所述的方法，其中，所述终端设备具有执行第一类随机接入的能力。
  16. 一种随机接入方法，所述方法包括：
    网络设备发送随机接入类型的选择参数，所述随机接入类型的选择参数用于使终端设备确定随机接入类型。
  17. 根据权利要求16所述的方法，其中，所述方法还包括：
    所述网络设备发送第一阈值，所述第一阈值用于使所述终端设备结合服务小区的信号强度参数确定随机接入类型。
  18. 根据权利要求17所述的方法，其中，所述第一阈值通过系统广播消息或无线资源控制RRC专用信令承载。
  19. 根据权利要求16所述的方法，其中，所述方法还包括：
    所述网络设备发送第二阈值和第三阈值，所述第二阈值和所述第三阈值用于使所述终端设备结合服务小区的信号强度参数确定随机接入类型。
  20. 根据权利要求19所述的方法，其中，所述第二阈值和所述第三阈值通过系统广播消息或RRC专用信令承载。
  21. 根据权利要求16至20任一项所述的方法，其中，所述随机接入类型的选择参数通过系统广播消息或RRC专用信令承载。
  22. 根据权利要求16至21任一项所述的方法，其中，所述随机接入类型的选择参数包括：
    随机接入类型的权重参数，或与随机接入类型的负荷相关的参数。
  23. 一种终端设备，所述终端设备包括：
    处理单元，配置为基于下述中的至少一项确定随机接入类型：
    随机接入类型的选择参数、服务小区的信号强度参数和上行带宽部分的资源配置。
  24. 根据权利要求23所述的终端设备，其中，所述终端设备还包括：
    接收单元，配置为接收网络设备通过系统广播消息或无线资源控制RRC专用信令发送的随机接入类型的选择参数。
  25. 根据权利要求23或24所述的终端设备，其中，所述处理单元配置为：
    在激活的上行带宽部分配置第一类随机接入资源的情况下，确定随机接入类型为第 一类随机接入；
    在激活的上行带宽部分配置第二类随机接入资源的情况下，确定随机接入类型为第二类随机接入；
    在激活的上行带宽部分配置第一类随机接入资源和第二类随机接入资源的情况下，基于随机接入类型的选择参数和/或服务小区的信号强度参数，确定随机接入类型；或者随机确定随机接入类型；
    在激活的上行带宽部分未配置第一类随机接入资源和第二类随机接入资源的情况下，基于初始带宽部分的资源配置确定随机接入类型。
  26. 根据权利要求25所述的终端设备，其中，所述终端设备处于连接态。
  27. 根据权利要23至26任一项所述的终端设备，其中，所述处理单元，配置为在所述服务小区的信号强度参数小于或等于第一阈值的情况下，确定随机接入类型为第二类随机接入；
    在所述服务小区的信号强度参数大于所述第一阈值的情况下，基于所述随机接入类型的选择参数，确定随机接入类型。
  28. 根据权利要求27所述的终端设备，其中，所述第一阈值通过系统广播消息或无线资源控制RRC专用信令承载。
  29. 根据权利要求23至26任一项所述的终端设备，其中，所述处理单元，配置为在所述服务小区的信号强度参数大于或等于第二阈值的情况下，确定随机接入类型为第一类随机接入；
    在所述服务小区的信号强度参数小于所述第三阈值的情况下，确定随机接入类型为第二类随机接入；
    在所述服务小区的信号强度参数大于或等于所述第三阈值、且小于所述第二阈值的情况下，基于所述随机接入类型的选择参数，确定所述接入类型；或者随机确定随机接入类型。
  30. 根据权利要求29所述的终端设备，其中，所述第二阈值和所述第三阈值通过系统广播消息或RRC专用信令承载。
  31. 根据权利要求23至30任一项所述的终端设备，其中，所述处理单元，配置为生成随机数；
    在所述随机数小于第一选择参数的情况下，确定随机接入类型为第一类随机接入；
    在所述随机数大于或等于所述第一选择参数的情况下，确定随机接入类型为第二类 随机接入；
    所述第一选择参数为第一类随机接入的选择参数。
  32. 根据权利要求23至30任一项所述的终端设备，其中，所述处理单元，配置为生成随机数；
    在所述随机数大于第二选择参数的情况下，确定随机接入类型为第二类随机接入；
    在所述随机数小于或等于所述第二选择参数的情况下，确定随机接入类型为第一类随机接入；
    所述第二选择参数为第二类随机接入的选择参数。
  33. 根据权利要求23至32任一项所述的终端设备，其中，所述随机接入类型的选择参数包括：
    随机接入类型的权重参数，或与随机接入类型的负荷相关的参数。
  34. 根据权利要求23至33任一项所述的终端设备，其中，所述服务小区的信号强度参数为参考信号接收功率RSRP。
  35. 根据权利要求23至34任一项所述的终端设备，其中，所述处理单元，还配置为基于所确定的随机接入类型执行随机接入过程。
  36. 根据权利要求35所述的终端设备，其中，所述处理单元执行随机接入过程失败的情况下，所述处理单元，还配置为基于所确定的随机接入类型重新执行随机接入过程；
    或者，所述处理单元，还配置为重新确定随机接入类型，基于重新确定的随机接入类型执行随机接入过程。
  37. 根据权利要求23至36任一项所述的终端设备，其中，所述终端设备具有执行第一类随机接入的能力。
  38. 一种网络设备，所述网络设备包括：
    发送单元，配置为发送随机接入类型的选择参数，所述随机接入类型的选择参数用于使终端设备确定随机接入类型。
  39. 根据权利要求38所述的网络设备，其中，所述发送单元，还配置为发送第一阈值，所述第一阈值用于使所述终端设备结合服务小区的信号强度参数确定随机接入类型。
  40. 根据权利要求39所述的网络设备，其中，所述第一阈值通过系统广播消息或无线资源控制RRC专用信令承载。
  41. 根据权利要求38所述的网络设备，其中，所述发送单元，还配置为发送第二阈值和第三阈值，所述第二阈值和所述第三阈值用于使所述终端设备结合服务小区的信号强度参数确定随机接入类型。
  42. 根据权利要求41所述的网络设备，其中，所述第二阈值和所述第三阈值通过系统广播消息或RRC专用信令承载。
  43. 根据权利要求38至42任一项所述的网络设备，其中，所述随机接入类型的选择参数通过系统广播消息或RRC专用信令承载。
  44. 根据权利要求38至43任一项所述的网络设备，其中，所述随机接入类型的选择参数包括：
    随机接入类型的权重参数，或与随机接入类型的负荷相关的参数。
  45. 一种终端设备，包括处理器和用于存储能够在处理器上运行的计算机程序的存储器，其中，
    所述处理器用于运行所述计算机程序时，执行权利要求1至15任一项所述的随机接入方法的步骤。
  46. 一种网络设备，包括处理器和用于存储能够在处理器上运行的计算机程序的存储器，其中，
    所述处理器用于运行所述计算机程序时，执行权利要求16至22任一项所述的随机接入方法的步骤。
  47. 一种存储介质，存储有可执行程序，所述可执行程序被处理器执行时，实现权利要求1至15任一项所述的随机接入方法。
  48. 一种存储介质，存储有可执行程序，所述可执行程序被处理器执行时，实现权利要求16至22任一项所述的随机接入方法。
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