WO2019029363A1 - 随机接入响应方法、装置、基站及终端 - Google Patents

随机接入响应方法、装置、基站及终端 Download PDF

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Publication number
WO2019029363A1
WO2019029363A1 PCT/CN2018/097026 CN2018097026W WO2019029363A1 WO 2019029363 A1 WO2019029363 A1 WO 2019029363A1 CN 2018097026 W CN2018097026 W CN 2018097026W WO 2019029363 A1 WO2019029363 A1 WO 2019029363A1
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mac
random access
pdu
sub
access response
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PCT/CN2018/097026
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English (en)
French (fr)
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谌丽
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电信科学技术研究院有限公司
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Priority to JP2020507615A priority Critical patent/JP7003222B2/ja
Priority to EP18844919.3A priority patent/EP3668173B1/en
Priority to KR1020207006422A priority patent/KR102377833B1/ko
Priority to US16/638,096 priority patent/US11770856B2/en
Publication of WO2019029363A1 publication Critical patent/WO2019029363A1/zh

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    • 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
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/16—Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
    • H04L69/166—IP fragmentation; TCP segmentation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/22—Parsing or analysis of headers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/30—Definitions, standards or architectural aspects of layered protocol stacks
    • H04L69/32—Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
    • H04L69/322—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • H04W28/065—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information using assembly or disassembly of packets
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present disclosure relates to the field of communications technologies, and in particular, to a random access response method, apparatus, base station, and terminal.
  • the random access of the LTE (Long Term Evolution) system and the NR (New Radio) system is classified into two types: contention random access and non-contention random access.
  • the contention random access of the LTE system is used for: 1) initial access of the terminal; 2) RRC (Radio Resource Control) connection reconstruction and handover; 3) downlink data arrival in the RRC connected state in the non-synchronized state; 4) Uplink data arrives in the RRC connected state; 5) Positions in the RRC connected state.
  • the NR system also introduces a system message request, an inactive UE (User Equipment, User Equipment) to restore the connection, and the like.
  • the competitive random access process is shown in Figure 1. It is mainly divided into four steps:
  • the Msg1 The UE selects a random access preamble Preamble and a random access resource PRACH (Physical Random Access Channel), and sends the selected random access preamble Preamble to the base station on the selected PRACH resource.
  • PRACH Physical Random Access Channel
  • a specific Preamble and/or PRACH resource is reserved for the Msg1-based system message request "Msg1 based SI request".
  • the base station receives the random access request Msg1 and sends a random access response to the UE.
  • the random access response includes an uplink timing advance, an uplink resource UL grant allocated for Msg3, and a temporary C-RNTI allocated by the network side (cell wireless).
  • Network Radio ID Cell Radio Network Temporary Identifier).
  • the PDCCH (Physical Downlink Control Channel) carrying the Msg2 scheduling message is scrambled by the RA-RNTI (Random Access-Radio Network Temporary Identifier), and the Preamble ID is also carried in the Msg2.
  • the RA-RNTI and the Preamble ID determine that the Msg2 corresponds to the Msg1 transmitted by it.
  • Msg2 In the NR system, for the Msg1-based system message request, Msg2 only contains the Preamble ID information corresponding to Msg1, and there is no other content. And for the Msg1-based system message request scenario, the random access procedure ends with Msg2, that is, if the received Msg2 includes the Preamble ID corresponding to the Preamble sent by the Msg1, the Msg1-based system message request process is considered complete.
  • the UE sends an uplink transmission on the UL grant specified by the Msg2.
  • the content of the Msg3 uplink transmission is different for different random access reasons. For example, for the initial access, the Msg3 transmits an RRC connection establishment request.
  • Msg4 The contention resolution message, the UE can judge whether the random access is successful according to Msg4. For the initial access UE, after the contention resolution is successful, the temporary C-RNTI is automatically converted into the UE's unique UE identity C-RNTI in the cell.
  • Non-contention random access is used for handover, downlink data arrival, location, and acquisition of uplink timing.
  • the process is shown in Figure 2 and is mainly divided into three steps:
  • the base station allocates a dedicated Preamble for non-contention random access and a PRACH resource used for random access to the UE.
  • Msg1 The UE sends the designated dedicated Preamble to the base station on the designated PRACH resource according to the indication of Msg0. After receiving the Msg1, the base station calculates the uplink timing advance TA according to Msg1.
  • the base station sends a random access response to the UE.
  • the random access response includes timing advance information and a subsequent uplink transmission resource allocation UL grant, and the timing advance is used for the timing relationship of the UE subsequent uplink transmission.
  • a MAC PDU Media Access Control Protocol Data Unit
  • MAC RAR Media Access Control Random Access Response
  • the MAC header is composed of one or more MAC sub-headers.
  • a maximum of one BI (Back Off Indicator) sub-header is present in one MAC PDU.
  • the sub-header does not correspond to the MAC RAR, and each of the other MAC sub-heads corresponds to one MAC. RAR.
  • MAC sub-headers There are two types of MAC sub-headers in the LTE system, one is carrying BI, and the other is carrying RAPID (Random Access Preamble ID).
  • RAPID Random Access Preamble ID
  • the sub-header carrying the Preamble ID is always a MAC RAR. correspond.
  • the specific format is shown in Figure 3 to Figure 6.
  • the NR system has not yet defined a random access response MAC PDU format, one way is to follow the LTE format.
  • the UE In the LTE system, the UE must sequentially parse each MAC sub-header in the MAC header, and after receiving the sub-header, can receive the MAC RAR. If the MAC RAR for the UE is later, the UE needs to sequentially discard the other MAC RAR, until the interpretation of its own MAC RAR. This method will result in inefficient processing, prolonged from Msg2 to Msg3, and increase the power consumption of the terminal.
  • An object of the present disclosure is to provide a random access response method, apparatus, base station, and terminal, to solve the problem that the processing efficiency of the related random access response message is low, and the time between Msg2 and Msg3 is extended, and the power consumption of the terminal is increased. .
  • some embodiments of the present disclosure provide a random access response method, the method is applied to a base station, and includes: sending a random access response message to a terminal, where media access control of the random access response message
  • the protocol data unit MAC PDU includes at least one medium access control sub-protocol data unit MAC sub-PDU, each of the MAC sub-PDUs including a MAC sub-header and possibly a media access control random access response MAC corresponding to the MAC sub-header RAR; when the MAC subPDU is at least two, at least two of the MAC subPDUs are sequentially arranged in the MAC PDU.
  • the MAC sub PDU includes a first MAC sub PDU, and the first MAC sub PDU includes only the first MAC subheader.
  • the first MAC subheader is a subheader including a fallback indication BI.
  • the first MAC subPDU is queued before other MAC subPDUs in the random access response message.
  • the first MAC subheader is a MAC subheader that responds to the Msg1-based system message request.
  • the first MAC subPDU is located at a predetermined location of a MAC PDU of the random access response message.
  • the predetermined position is a position before all the second MAC subPDUs, or a position after all the second MAC subPDUs, where the second MAC subPDU includes a MAC subheader and a corresponding MAC address. RAR.
  • some embodiments of the present disclosure further provide a random access response method, where the method is applied to a terminal, and includes: receiving a random access response message sent by a base station, where media access of the random access response message
  • the control protocol data unit MAC PDU includes at least one medium access control sub-protocol data unit MAC sub-PDU, each of the MAC sub-PDUs including a MAC sub-header and possibly a media access control random access response corresponding to the MAC sub-header MAC RAR; when the MAC sub PDU is at least two, at least two of the MAC sub PDUs are sequentially arranged in the MAC PDU.
  • the MAC sub PDU includes a first MAC sub PDU, and the first MAC sub PDU includes only the first MAC subheader.
  • the first MAC subheader is a subheader including a fallback indication BI.
  • the first MAC subPDU is queued before other MAC subPDUs in the random access response message.
  • the first MAC subheader is a MAC subheader that responds to the Msg1-based system message request.
  • the first MAC subPDU is located at a predetermined location of a MAC PDU of the random access response message.
  • the predetermined position is a position before all the second MAC subPDUs, or a position after all the second MAC subPDUs, where the second MAC subPDU includes a MAC subheader and a corresponding MAC address. RAR.
  • the method further includes: parsing the random access response message.
  • the step of parsing the random access response message includes: parsing a first MAC subPDU of the random access response message; if the MAC sub-head of the first MAC sub-PDU includes a random access preamble
  • the code sequence number RAPID the MAC subPDU is a MAC sub PDU including a MAC RAR, and the entire MAC PDU is split according to a preset byte length of the MAC sub PDU including the MAC RAR, and each of the MAC RARs is obtained.
  • MAC subPDU parallel parsing of each MAC sub PDU.
  • the method further includes: if the first MAC subPDU is a MAC subheader including a backoff indication BI, and If the cell that initiates the random access does not enable the Msg1-based system message request function, the entire MAC PDU is excluded from the first MAC subPDU according to the preset byte length of the MAC sub-PDU including the MAC RAR. The remaining part is split to obtain each MAC subPDU containing MAC RAR; each MAC subPDU is parsed in parallel.
  • the method further includes: if the first MAC subPDU is a MAC subheader including a backoff indication BI, and When the cell that initiates the random access by the terminal has enabled the Msg1-based system message request function, and pre-arranges that the MAC subPDU responding to the Msg1-based system message request is located before all the second MAC subPDUs, the random access is further performed.
  • the second MAC subPDU of the response message if it is determined that the second MAC subPDU includes a MAC sub-header responding to the Msg1-based system message request, then further the third MAC sub-PDU of the random access response message If the MAC RAR is included in the third MAC subPDU, the first MAC subPDU and the second MAC PDU are included in the entire MAC PDU according to a preset byte length of the MAC sub PDU including the MAC RAR. The remaining portions of the MAC sub-PDUs are split to obtain each MAC sub-PDU including the MAC RAR; and each MAC sub-PDU is parsed in parallel.
  • the method further includes: when parsing one of the MAC sub PDUs including the MAC RAR, the RAPID included in the MAC subheader in the one of the MAC subPDUs When the random access preamble sequence preamble ID of the terminal when the terminal sends the random access request Msg1 is consistent, the other MAC subPDUs including the MAC RAR are discarded.
  • the method further includes: if the first MAC subPDU is a MAC subheader including a backoff indication BI, and The cell that initiates the random access by the terminal has enabled the Msg1-based system message request function, and the MAC sub-PDU that is pre-agreed for responding to the Msg1-based system message request is located after all the second MAC subPDUs, according to the preset inclusion.
  • the byte length of the MAC sub-PDU of the MAC RAR, and the remaining part of the entire MAC PDU except the first MAC sub-PDU is split to obtain each MAC sub-PDU including the MAC RAR, and possibly less than the MAC RAR.
  • the remainder of the byte length of the MAC subPDU which may contain a MAC sub PDU that responds to the Msg1 system message request.
  • the method further includes: performing parallel parsing on each of the MAC sub PDUs including the MAC RAR and responding to the request for the Msg1 based system message respectively.
  • the MAC subPDU is parsed.
  • the method further includes: if the terminal simultaneously sends the Msg1-based system message request and another random access request, the terminal parses out the MAC sub-header of one of the MAC sub-PDUs in the MAC sub-PDU including the MAC RAR.
  • the RAPID is the same as the random access preamble sequence preamble ID when the terminal sends the random access request Msg1, and then discards other MAC subPDUs including the MAC RAR; if the terminal only sends the Msg1 based system message request, the terminal discards All MAC subPDUs including MAC RAR only parse the remaining part to obtain a response to the Msg1 based system message request; if the terminal only sends a random access request that is not based on the Msg1 system message request, the terminal discard may be included for The system message of the Msg1 requests the remaining part of the responding MAC sub-PDU, and parses the MAC sub-PDU including the MAC RAR in parallel, and if the RAPID included in the MAC sub-header of one of the MAC sub-PDUs is parsed and the terminal sends the random access request Msg1 When the random access preamble sequence number preamble ID is the same, all other MAC subPDUs are
  • some embodiments of the present disclosure further provide a random access response apparatus, which is applied to a base station, and includes: a sending module, configured to send a random access response message to the terminal, where the random access response message is
  • the medium access control protocol data unit MAC PDU includes at least one medium access control sub-protocol data unit MAC sub PDU, each of the MAC sub PDUs including a MAC sub-header and possibly a media access control corresponding to the MAC sub-header
  • the access response MAC RAR when the MAC subPDU is at least two, at least two of the MAC subPDUs are sequentially arranged in the MAC PDU.
  • the MAC sub PDU includes a first MAC sub PDU, and the first MAC sub PDU includes only the first MAC subheader.
  • the first MAC subheader is a subheader including a fallback indication BI.
  • the first MAC subPDU is queued before other MAC subPDUs in the random access response message.
  • the first MAC subheader is a MAC subheader that responds to the Msg1-based system message request.
  • the first MAC subPDU is located at a predetermined location of a MAC PDU of the random access response message.
  • the predetermined position is a position before all the second MAC subPDUs, or a position after all the second MAC subPDUs, where the second MAC subPDU includes a MAC subheader and a corresponding MAC address. RAR.
  • some embodiments of the present disclosure also provide a base station including a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor implementing the computer program to implement the following Step: Send a random access response message to the terminal, where the media access control protocol data unit MAC PDU of the random access response message includes at least one medium access control sub-protocol data unit MAC sub PDU, and each of the MAC subPDUs includes a MAC subheader and possibly a media access control random access response MAC RAR corresponding to the MAC subheader; when the MAC subPDU is at least two, at least two of the MAC subPDUs are sequentially in the MAC PDU Arrange in order.
  • the media access control protocol data unit MAC PDU of the random access response message includes at least one medium access control sub-protocol data unit MAC sub PDU
  • each of the MAC subPDUs includes a MAC subheader and possibly a media access control random access response MAC RAR corresponding to the
  • some embodiments of the present disclosure further provide a computer readable storage medium having stored thereon a computer program that, when executed by a processor, implements the step of: transmitting a random access response message to a terminal, wherein
  • the medium access control protocol data unit MAC PDU of the random access response message includes at least one medium access control sub-protocol data unit MAC sub PDU, each of the MAC subPDUs including a MAC sub-header and possibly a MAC sub-header Corresponding media access control random access response MAC RAR; when the MAC subPDU is at least two, at least two of the MAC subPDUs are sequentially arranged in the MAC PDU.
  • some embodiments of the present disclosure further provide a random access response apparatus, which is applied to a terminal, and includes: a receiving module, configured to receive a random access response message sent by a base station, where the random access response message
  • the medium access control protocol data unit MAC PDU includes at least one medium access control sub-protocol data unit MAC sub PDU, each of the MAC sub PDUs including a MAC sub-header and possibly media access control corresponding to the MAC sub-header
  • the random access response MAC RAR when the MAC subPDU is at least two, at least two of the MAC subPDUs are sequentially arranged in the MAC PDU.
  • the MAC sub PDU includes a first MAC sub PDU, and the first MAC sub PDU includes only the first MAC subheader.
  • the first MAC subheader is a subheader including a fallback indication BI.
  • the first MAC subPDU is queued before other MAC subPDUs in the random access response message.
  • the first MAC subheader is a MAC subheader that responds to the Msg1-based system message request.
  • the first MAC subPDU is located at a predetermined location of a MAC PDU of the random access response message.
  • the predetermined position is a position before all the second MAC subPDUs, or a position after all the second MAC subPDUs, where the second MAC subPDU includes a MAC subheader and a corresponding MAC address. RAR.
  • the device further includes: a parsing module, configured to parse the random access response message after receiving the random access response message sent by the base station.
  • the parsing module includes: a first parsing submodule, configured to parse the first MAC subPDU of the random access response message; and a first splitting module, configured to: if the MAC sub of the first MAC subPDU The header includes a random access preamble sequence number RAPID, and the MAC subPDU is a MAC sub PDU including a MAC RAR, and the entire MAC PDU is split according to a preset byte length of a MAC sub PDU including a MAC RAR. Obtaining each MAC subPDU including a MAC RAR; a first parallel parsing submodule for performing parallel parsing on each MAC sub PDU.
  • the parsing module further includes: a second splitting module, configured to: after parsing the first MAC subPDU of the random access response message, if the first MAC subPDU is a MAC including a backoff indication BI The sub-header, and the cell that initiates the random access by the terminal does not enable the Msg1-based system message request function, and according to the preset byte length of the MAC sub-PDU including the MAC RAR, the entire MAC PDU is removed. The remaining part of the first MAC sub-PDU is split to obtain each MAC sub-PDU including the MAC RAR; and the second parallel parsing sub-module is used for parallel parsing of each MAC sub-PDU.
  • a second splitting module configured to: after parsing the first MAC subPDU of the random access response message, if the first MAC subPDU is a MAC including a backoff indication BI The sub-header, and the cell that initiates the random access by the terminal does not enable the Ms
  • the parsing module further includes: a second parsing submodule, configured to: after parsing the first MAC subPDU of the random access response message, if the first MAC subPDU is a MAC including a backoff indication BI a sub-header, and the cell that initiates the random access by the terminal has enabled the Msg1-based system message request function, and pre-arranges that the MAC sub PDU responding to the Msg1-based system message request is located before all the second MAC subPDUs, then further Parsing a second MAC sub-PDU of the random access response message; and a third parsing sub-module, configured to: if it is determined that the second MAC sub-PDU includes a MAC sub-header that responds to the Msg1-based system message request, further And parsing a third MAC sub PDU of the random access response message, where the third splitting module is configured to: if the MAC RAR is included in the third MAC sub PDU, according
  • the parsing module further includes: a first processing submodule, configured to: after parsing each MAC sub PDU in parallel, when parsing one of the MAC sub PDUs including the MAC RAR, the MAC sub of the one of the MAC subPDUs When the RAPID included in the header matches the random access preamble sequence number preamble ID when the terminal sends the random access request Msg1, the other MAC subPDUs including the MAC RAR are discarded.
  • a first processing submodule configured to: after parsing each MAC sub PDU in parallel, when parsing one of the MAC sub PDUs including the MAC RAR, the MAC sub of the one of the MAC subPDUs When the RAPID included in the header matches the random access preamble sequence number preamble ID when the terminal sends the random access request Msg1, the other MAC subPDUs including the MAC RAR are discarded.
  • the parsing module further includes: a fourth splitting module, configured to: after parsing the first MAC sub PDU of the random access response message, if the first MAC subPDU includes a backoff indication BI a MAC sub-header, and the cell that initiates the random access by the terminal has enabled the Msg1-based system message request function, and pre-arranges that the MAC subPDU responding to the Msg1-based system message request is located after all the second MAC subPDUs, Decoding the remaining part of the entire MAC PDU except the first MAC sub PDU according to a preset byte length of the MAC sub PDU including the MAC RAR, obtaining each MAC sub PDU including the MAC RAR, and It may be less than the remainder of the byte length of the MAC sub-PDU containing the MAC RAR, which may contain a MAC sub-PDU that responds to the system message request of Msg1.
  • a fourth splitting module configured to: after parsing the first MAC
  • the parsing module further includes: a fourth parsing sub-module, configured to parse each MAC sub-PDU including the MAC RAR in parallel and parse the MAC sub-PDU that may include a response to the Msg1-based system message request.
  • the parsing module further includes: a second processing submodule, configured to: if the terminal simultaneously sends the Msg1 based system message request and another random access request, the terminal parses one of the MAC subPDUs including the MAC RAR When the RAPID included in the MAC sub-header of the MAC sub-PDU is consistent with the random access preamble sequence number preamble ID when the terminal sends the random access request Msg1, the MAC sub-PDU including the MAC RAR is discarded; the third processing sub-module, If the terminal only sends the Msg1-based system message request, the terminal discards all the MAC sub-PDUs including the MAC RAR, parses only the remaining part, and obtains a response for the Msg1-based system message request; the fourth processing sub-module is used for If the terminal only sends a random access request that is not based on the Msg1 system message request, the terminal discards the remaining part of the MAC subPDU that may include a response
  • some embodiments of the present disclosure further provide a terminal, including a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor implementing the computer program to implement the following Step: receiving a random access response message sent by the base station, where the media access control protocol data unit MAC PDU of the random access response message includes at least one medium access control sub-protocol data unit MAC sub PDU, each of the MAC sub PDUs Include a MAC subheader and possibly a media access control random access response MAC RAR corresponding to the MAC subheader; when the MAC subPDU is at least two, at least two of the MAC subPDUs are in the MAC PDU Arrange in order.
  • the media access control protocol data unit MAC PDU of the random access response message includes at least one medium access control sub-protocol data unit MAC sub PDU, each of the MAC sub PDUs Include a MAC subheader and possibly a media access control random access response MAC RAR corresponding to the MAC
  • some embodiments of the present disclosure further provide a computer readable storage medium, where the computer program is stored, and when the computer program is executed by the processor, the following steps are performed: receiving a random access response message sent by the base station,
  • the medium access control protocol data unit MAC PDU of the random access response message includes at least one medium access control sub-protocol data unit MAC sub PDU, and each of the MAC subPDUs includes a MAC sub-header and possibly a MAC sub-header.
  • the media access control random access response MAC RAR corresponding to the header; when the MAC subPDU is at least two, at least two of the MAC subPDUs are sequentially arranged in the MAC PDU.
  • the present disclosure may have three types of MAC subPDUs, one is a MAC sub PDU including only a MAC sub-header containing BI, that is, a first type of first MAC subPDU; the second type includes only a MAC sub-ID containing a RAPID.
  • the MAC sub-PDU of the header, that is, the first MAC sub-PDU of the second type, the RAPID is consistent with the preamble ID reserved for the Msg1 system message request;
  • the third is the MAC sub-PDU including the MAC sub-header and the MAC RAR, that is, the second MAC subPDU.
  • the contents of each MAC subPDU are completely independent of each other.
  • the base station sends a random access response message to the terminal, and the terminal receives the random access response message sent by the base station and parses the random access response message, where the media of the random access response message
  • the access control protocol data unit MAC PDU includes at least one medium access control sub-protocol data unit MAC sub-PDU, each of the MAC sub-PDUs including a MAC sub-header and possibly a media access control corresponding to the MAC sub-header.
  • the response may be from multiple terminals in one MAC PDU.
  • a random access request of the demand can not only provide fast feedback of the random access response, but also effectively save time-frequency resources.
  • the independent terminal MAC sub PDU design unique to the present disclosure enables a single terminal UE to be quickly disassembled.
  • the MAC PDU is parsed and the MAC sub PDU is parsed in parallel to quickly obtain a response to the random access request of the terminal, and discard I information, both to reduce random access delay, and to achieve power terminal.
  • 1 is a flow chart of contention random access of an LTE system and an NR system
  • FIG. 2 is a flow chart of non-contention random access of an LTE system and an NR system
  • FIG. 3 is a schematic structural diagram of a MAC PDU of a random access response message of an LTE system
  • FIG. 4 is a schematic structural diagram of a MAC subheader carrying a RAPID in FIG. 3;
  • FIG. 5 is a schematic structural diagram of a MAC subheader carrying BI in FIG. 3;
  • FIG. 6 is a schematic structural diagram of MAC RARA in FIG. 3;
  • FIG. 7 is one of working flowcharts of a random access response method according to some embodiments of the present disclosure.
  • FIG. 8 is a schematic structural diagram of a MAC PDU of a random access response message according to the present disclosure
  • FIG. 9 is a schematic diagram of a location of a MAC sub PDU in a MAC PDU for an Msg1 based SI request response according to the present disclosure
  • FIG. 10 is a second schematic diagram of a location of a MAC sub PDU in a MAC PDU for an Msg1 based SI request response according to the present disclosure
  • FIG. 11 is a second working flowchart of a random access response method according to some embodiments of the present disclosure.
  • FIG. 12 is a schematic structural diagram of only a MAC sub PDU including a MAC RAR in a MAC PDU of a random access response message according to the present disclosure
  • FIG. 13 is a schematic structural diagram of a MAC PDU including a BI and a MAC sub PDU including a MAC RAR in a MAC PDU of the random access response message according to the present disclosure
  • FIG. 14 is a schematic structural diagram of a MAC PDU including a BI, a MAC sub PDU including a MAC RAR, and a MAC sub PDU for an Msg1 based SI request response in a MAC PDU of the random access response message according to the present disclosure;
  • FIG. 15 is a schematic structural diagram of a MAC PDU including a BI, a MAC sub PDU including a MAC RAR, and a MAC sub PDU for an Msg1 based SI request response in the MAC PDU of the present disclosure;
  • 16 is a block diagram of a random access response apparatus according to some embodiments of the present disclosure.
  • FIG. 17 is a structural block diagram of a base station according to some embodiments of the present disclosure.
  • FIG. 18 is a second schematic diagram of a module of a random access response apparatus according to some embodiments of the present disclosure.
  • FIG. 19 is a structural block diagram of a terminal according to some embodiments of the present disclosure.
  • Some embodiments of the present disclosure provide a random access response method, apparatus, base station, and terminal, which solve the problem that the processing efficiency of parsing a random access response message in the related art is low, and the time between Msg2 and Msg3 is extended, and the terminal is added.
  • the problem of power consumption is low.
  • some embodiments of the present disclosure provide a random access response method, which is applied to a base station and includes step 101.
  • Step 101 Send a random access response message to the terminal, where the media access control protocol data unit MAC PDU of the random access response message includes at least one medium access control sub-protocol data unit MAC sub PDU, each of the MAC sub PDUs Include a MAC subheader and possibly a media access control random access response MAC RAR corresponding to the MAC subheader; when the MAC subPDU is at least two, at least two of the MAC subPDUs are in the MAC PDU Arrange in order.
  • the media access control protocol data unit MAC PDU of the random access response message includes at least one medium access control sub-protocol data unit MAC sub PDU, each of the MAC sub PDUs Include a MAC subheader and possibly a media access control random access response MAC RAR corresponding to the MAC subheader; when the MAC subPDU is at least two, at least two of the MAC subPDUs are in the MAC PDU Arrange in order.
  • the present disclosure defines a MAC PDU structure as shown in FIG.
  • each MAC sub-header and its corresponding MAC RAR in the MAC PDU form a MAC sub-PDU, that is, a MAC sub-PDU; if there is no corresponding MAC RAR, the MAC sub-header independently forms a MAC sub-PDU, and all MAC sub-pros.
  • the PDUs are arranged in order.
  • the base station sends a random access response message to the terminal, where the medium access control protocol data unit MAC PDU of the random access response message includes at least one medium access control sub-protocol a data unit MAC subPDU, each of the MAC subPDUs including a MAC subheader and a possible medium access control random access response MAC RAR corresponding to the MAC subheader; when the MAC subPDU is at least two, at least The two MAC sub PDUs are sequentially arranged in the MAC PDU, which enables the base station gNB to quickly respond to random access requests originating from multiple terminals and multiple requirements.
  • the medium access control protocol data unit MAC PDU of the random access response message includes at least one medium access control sub-protocol a data unit MAC subPDU, each of the MAC subPDUs including a MAC subheader and a possible medium access control random access response MAC RAR corresponding to the MAC subheader; when the MAC subPDU is at least two, at least The two
  • the MAC sub PDU includes a first MAC sub PDU, and the first MAC sub PDU includes only the first MAC subheader.
  • the first MAC subheader is a subheader including a backoff indication BI.
  • the first MAC subPDU is queued before other MAC subPDUs.
  • the first MAC subPDU includes a sub-header of BI, and the first MAC sub-PDU is ranked at the forefront of the MAC PDU.
  • the first MAC subheader is a MAC subheader that responds to the Msg1-based system message request.
  • the MAC sub-header format of the response and the MAC sub-corresponding to the MAC RAR there is another case for the response of the Msg1 based SI request, the MAC sub-header format of the response and the MAC sub-corresponding to the MAC RAR.
  • the header format is the same, except that there is no corresponding MAC RAR in the MAC subheader.
  • the MAC sub-headers responding to the Msg1 based SI request independently form a MAC sub-PDU containing only the MAC sub-header.
  • the first MAC subPDU is located at a predetermined location of a MAC PDU of the random access response message.
  • the predetermined location is a location before all the second MAC subPDUs, or a location after all the second MAC subPDUs, where the second MAC subPDU includes a MAC subheader and a corresponding one.
  • MAC RAR MAC resource assignment
  • FIG. 9 one of the schematic diagrams of the location of the MAC subPDU for the Msg1 based SI request in the MAC PDU.
  • the first MAC subPDU in the MAC PDU is a MAC subheader including BI; if there is no BI indication, the MAC subPDU may not exist; the second MAC subPDU is a MAC subPDU that responds to the Msg1 based SI request; Each of the MAC sub-PDUs is a random access response for the UE that sends the corresponding preamble preamble, that is, each subsequent MAC sub-PDU includes a MAC sub-header and a corresponding MAC RAR.
  • FIG. 10 it is the second schematic diagram of the location of the MAC sub PDU in response to the Msg1 based SI request in the MAC PDU.
  • the first MAC sub PDU in the MAC PDU is a MAC sub-header including BI. If there is no BI indication, the MAC sub-PDU may not exist; the following is a MAC sub-PDU including a MAC RAR, where each MAC sub-PDU is A random access response to the UE transmitting the corresponding preamble preamble; after the MAC subPDU containing the MAC RAR, is a MAC sub PDU for the Msg1 based SI request response.
  • the MAC subPDUs for the Msg1 based SI request response are ranked after all the MAC sub-PDUs including the MAC RAR.
  • the base station sends a random access response message to the terminal
  • the terminal receives the random access response message sent by the base station, and parses the random access response message, where the random access response message
  • the medium access control protocol data unit MAC PDU includes at least one medium access control sub-protocol data unit MAC sub PDU, each of the MAC sub PDUs including a MAC sub-header and possibly media access control corresponding to the MAC sub-header
  • the random access response MAC RAR when the MAC subPDU is at least two, at least two of the MAC subPDUs are sequentially arranged in the MAC PDU, which not only enables the base station gNB to quickly respond to multiple terminals, multiple requirements
  • the random access request can also enable a single terminal UE to quickly receive and parse the response to the random access request sent by the terminal, which not only reduces the random access delay but also implements terminal power saving.
  • some embodiments of the present disclosure further provide a random access response method, which is applied to a terminal and includes step 201.
  • Step 201 Receive a random access response message sent by the base station, where the media access control protocol data unit MAC PDU of the random access response message includes at least one medium access control sub-protocol data unit MAC sub PDU, each of the MACs
  • the subPDU includes a MAC subheader and a possible medium access control random access response MAC RAR corresponding to the MAC subheader; when the MAC subPDU is at least two, at least two of the MAC subPDUs are in the MAC PDU.
  • the order is in order.
  • the present disclosure defines a MAC PDU structure as shown in FIG.
  • the structure refers to the description of the part of the base station side random access response method, which is not described here.
  • the terminal receives a random access response message sent by the base station, and parses the random access response message, where the media access control protocol data unit MAC PDU of the random access response message Included at least one medium access control sub-protocol data unit MAC sub-PDU, each of the MAC sub-PDUs including a MAC sub-header and a possible medium access control random access response MAC RAR corresponding to the MAC sub-header;
  • the MAC sub PDU is at least two, at least two of the MAC sub PDUs are sequentially arranged in the MAC PDU, so that the single terminal UE can quickly receive and parse the response to the random access request sent by the terminal, which reduces the random connection. Into the delay, and achieve terminal power saving.
  • the MAC sub PDU includes a first MAC sub PDU, and the first MAC sub PDU includes only the first MAC subheader.
  • the first MAC subheader is a subheader including a backoff indication BI.
  • the first MAC subPDU is queued before other MAC subPDUs.
  • the first MAC subPDU includes a sub-header of BI, and the first MAC sub-PDU is ranked at the forefront of the MAC PDU.
  • the first MAC subheader is a MAC subheader that responds to the Msg1-based system message request.
  • the MAC sub-header format of the response and the MAC sub-corresponding to the MAC RAR there is another case for the response of the Msg1 based SI request, the MAC sub-header format of the response and the MAC sub-corresponding to the MAC RAR.
  • the header format is the same, except that there is no corresponding MAC RAR in the MAC subheader.
  • the MAC sub-headers responding to the Msg1 based SI request independently form a MAC sub-PDU containing only the MAC sub-header.
  • the first MAC subPDU is located at a predetermined location of a MAC PDU of the random access response message.
  • the predetermined location is a location before all the second MAC subPDUs, or a location after all the second MAC subPDUs, where the second MAC subPDU includes a MAC subheader and a corresponding one.
  • MAC RAR MAC resource assignment
  • the foregoing method further includes step 202.
  • Step 202 Parse the random access response message.
  • the terminal receives a random access response message sent by the base station, and parses the random access response message, where the media access control protocol data unit MAC PDU of the random access response message Included at least one medium access control sub-protocol data unit MAC sub-PDU, each of the MAC sub-PDUs including a MAC sub-header and a possible medium access control random access response MAC RAR corresponding to the MAC sub-header;
  • the MAC sub PDU is at least two, at least two of the MAC sub PDUs are sequentially arranged in the MAC PDU, so that the UE does not need to parse each MAC subheader and the corresponding MAC RAR serially, so that the UE can receive the UE quickly.
  • parsing the response to the random access request sent by the terminal not only reducing the random access delay, but also achieving terminal power saving.
  • the foregoing step 202 includes sub-steps 202-1 to 202-3.
  • Sub-step 202-1 parsing the first MAC subPDU of the random access response message
  • Sub-step 202-2 if the MAC sub-header of the first MAC sub-PDU includes a random access preamble sequence number RAPID, the MAC sub-PDU is a MAC sub-PDU including a MAC RAR, according to a preset MAC sub-PDU including a MAC RAR. Byte length, splitting the entire MAC PDU to obtain each MAC subPDU containing a MAC RAR;
  • Sub-step 202-3 parallel parsing is performed for each MAC sub PDU.
  • Step 1 The base station receives the random access request Msg1 sent by the terminal on the same time-frequency resource, and different terminals may send different preamble codes on the same time-frequency resource.
  • Step 2 The base station sends a random access response Msg2 to the terminal that sends the Msg1 on the same time-frequency resource.
  • a random access response Msg2 For the terminal that sends different preamble codes on the same time-frequency resource, multiple random access responses, ie, MAC RAR, can be organized. In a MAC PDU.
  • the MAC PDU format is defined in accordance with some embodiments of the present disclosure.
  • Step 3 The base station receives the Msg3 according to the uplink resource allocated by the Msg2 and performs subsequent operations of the random access.
  • Step 1 The terminal configures a random access resource according to the base station, and selects a PRACH and a preamble to initiate random access.
  • Step 2 The terminal parses the MAC sub-header of the first MAC sub-PDU, and determines that it includes the MAC RAR.
  • Step 3 The terminal splits the MAC PDU into an integer number of MAC sub-PDUs, each MAC sub-PDU includes a MAC sub-header and a MAC RAR, and parses the MAC sub-PDUs in parallel, and once the MAC sub-PDU for the terminal is obtained, the terminal parses out If the RAPID included in the MAC sub-header of a MAC sub-PDU is the same as the random access preamble ID of the Msg1 sent by the terminal, the other MAC sub-PDUs are discarded.
  • Step 4 The terminal sends Msg3 and subsequent operations according to the received MAC RAR.
  • the sub-step 202-4 is further included.
  • Sub-step 202-4 when parsing one of the MAC sub-PDUs including the MAC RAR, the RAPID included in the MAC sub-header in the one of the MAC sub-PDUs and the random access preamble when the terminal sends the random access request Msg1 When the sequence number preamble IDs are the same, the other MAC subPDUs including the MAC RAR are discarded.
  • the MAC sub PDUs including the MAC RAR are independent entities, and the parallel parsing method can be quickly parsed to send random access with the current terminal.
  • the MAC sub-PDU including the MAC RAR with the random access preamble sequence number preamble ID when the Msg1 is requested is used to reduce the random access delay and achieve the terminal power saving.
  • step 202-1 sub-steps 202-5 and 202-6 are further included.
  • Sub-step 202-5 if the first MAC subPDU is a MAC sub-header including the back-off indication BI, and the cell that initiates the random access by the terminal does not enable the Msg1-based system message request function, according to the preset inclusion
  • the byte length of the MAC sub-PDU of the MAC RAR, and the remaining part of the entire MAC PDU except the first MAC sub-PDU is split to obtain each MAC sub-PDU including the MAC RAR;
  • Sub-step 202-6 parallel parsing is performed for each MAC subPDU.
  • the corresponding random access response MAC PDUs in the foregoing steps 202-5 to 202-6 include a MAC sub PDU including a BI and a MAC sub PDU including a MAC RAR.
  • the MAC PDU structure and terminal resolution processing sequence are as shown in FIG.
  • Step 1 The base station receives the random access request Msg1 sent by the terminal on the same time-frequency resource, and different terminals may send different preamble codes on the same time-frequency resource.
  • Step 2 The base station sends a random access response Msg2 to the terminal that sends the Msg1 on the same time-frequency resource.
  • a random access response Msg2 For the terminal that sends different preamble codes on the same time-frequency resource, multiple random access responses, ie, MAC RAR, can be organized.
  • MAC RAR For the terminal that sends different preamble codes on the same time-frequency resource, multiple random access responses, ie, MAC RAR, can be organized.
  • MAC PDU the base station may send a BI indication to perform random access congestion control;
  • Step 3 The base station receives the Msg3 according to the uplink resource allocated by the Msg2 and performs subsequent operations of the random access.
  • Step 1 The terminal configures a random access resource according to the base station, and selects a PRACH and a preamble to initiate random access.
  • Step 2 The terminal parses the MAC sub-header of the first MAC sub-PDU, and determines that it includes a BI indication.
  • Step 3 The terminal splits the remaining part of the MAC PDU of the first MAC subPDU into an integer number of MAC subPDUs, each MAC subPDU includes a MAC subheader and a MAC RAR, and parses the MAC subPDUs in parallel, if the The MAC sub-PDU of the terminal, that is, the RAPID included in the MAC sub-header of one of the MAC sub-PDUs is consistent with the random access preamble ID of the Msg1 sent by the terminal, and the other MAC sub-PDUs are discarded;
  • Step 4 The terminal sends Msg3 and subsequent operations according to the received MAC RAR.
  • step 202-4 is performed. For details, refer to the description of step 202-4, and details are not described herein again.
  • the method further includes:
  • Sub-step 202-7 if the first MAC sub-PDU is a MAC sub-header including the back-off indication BI, and the cell that initiates the random access by the terminal has enabled the Msg1-based system message request function, and the pre-agreed for the Msg1-based
  • the MAC sub-PDU of the system message request response is located before all the second MAC sub-PDUs, the second MAC sub-PDU of the random access response message is further parsed;
  • Sub-step 202-8 if it is determined that the second MAC subPDU includes a MAC sub-header that responds to the Msg1-based system message request, further parsing the third MAC sub-PDU of the random access response message;
  • Sub-step 202-9 if the third MAC sub-PDU includes the MAC RAR, according to the preset byte length of the MAC sub-PDU including the MAC RAR, except for the first MAC sub-PDU of the entire MAC PDU. And splitting the remaining part except the second MAC subPDU to obtain each MAC subPDU including the MAC RAR;
  • Sub-step 202-10 parallel parsing is performed for each MAC sub PDU.
  • step 202-4 is performed.
  • step 202-4 refers to the description in step 202-4, and details are not described herein again.
  • the corresponding random access response MAC PDUs in the foregoing steps 202-7 to 202-10 include a MAC sub PDU including BI, a MAC sub PDU including MAC RAR, and a MAC sub PDU for Msg1 based SI request response, and are targeted for Msg1 based
  • the MAC subPDU of the SI request response is placed before other MAC subPDUs.
  • the MAC PDU structure and terminal resolution processing sequence are as shown in FIG. 14.
  • Step 1 The base station receives the random access request Msg1 sent by the terminal on the same time-frequency resource, and different terminals may send different preamble codes on the same time-frequency resource.
  • Step 2 The base station sends a random access response Msg2 to the terminal that sends the Msg1 on the same time-frequency resource.
  • multiple random access responses ie, MAC RAR
  • the base station may send a BI indication to perform random access congestion control, and if it receives a preamble reserved by the base station for the Msg1 based SI request, responds to the Msg1 based SI request;
  • Step 3 The base station receives the Msg3 according to the uplink resource allocated by the Msg2 and performs subsequent operations of the random access.
  • Branch 1 If the random access procedure of the Msg1 based SI request can be performed in parallel with other random access procedures, the specific steps are as follows:
  • Step 1 The terminal configures the random access resource according to the base station, and selects the PRACH and the preamble to initiate the random access. If the terminal initiates the Msg1 based SI request process, the terminal uses the preamble and/or PRACH resources reserved by the base station for the system message request.
  • Step 2 The terminal parses the MAC sub-header of the first MAC sub-PDU to determine that it contains BI.
  • Step 3 The terminal parses the MAC sub-header of the second MAC subPDU, and determines that it includes a response to the Msg1 based SI request.
  • the random access process ends after receiving the response; if the terminal also sends other random access requests, proceed to step 4;
  • Step 4 The terminal parses the MAC sub-header of the subsequent MAC sub-PDU, and determines that it includes the MAC RAR.
  • Step 5 The terminal splits the remaining MAC PDU into an integer number of MAC sub-PDUs, each MAC sub-PDU includes a MAC sub-header and a MAC RAR, and parses the MAC sub-PDUs in parallel, and once the MAC sub-PDUs for the terminal are obtained, the terminal parses out If the RAPID included in the MAC sub-header of one of the MAC sub-PDUs is the same as the preamble ID of the Msg1 sent by the terminal, the other MAC sub-PDUs are discarded.
  • Step 6 The terminal sends Msg3 and subsequent operations according to the received MAC RAR.
  • Branch 2 If the random access procedure of the Msg1based SI request cannot be performed in parallel with other random access procedures, the specific steps are as follows:
  • Step 1 The terminal configures the random access resource according to the base station, and selects the PRACH and the preamble to initiate the random access. If the terminal initiates the Msg1 based SI request process, the terminal uses the preamble and/or PRACH resources reserved by the base station for the system message request.
  • Step 2 The terminal parses the MAC sub-header of the first MAC sub-PDU to determine that it contains BI.
  • Step 3 The terminal parses the MAC sub-header of the second MAC subPDU, and determines that it includes a response to the Msg1 based SI request.
  • the random access procedure ends after receiving the response; if the terminal sends the random access procedure of other purposes, the process proceeds to step 4;
  • Step 4 The terminal parses the MAC sub-header of the subsequent MAC sub-PDU, and determines that it includes the MAC RAR.
  • Step 5 The terminal splits the remaining MAC PDU into an integer number of MAC sub-PDUs, each MAC sub-PDU includes a MAC sub-header and a MAC RAR, and parses the MAC sub-PDUs in parallel. If the MAC sub-PDU is obtained for the terminal, the terminal parses out If the RAPID included in the MAC sub-header of one of the MAC sub-PDUs is the same as the preamble ID of the Msg1 sent by the terminal, the other MAC sub-PDUs are discarded.
  • Step 6 The terminal sends Msg3 and subsequent operations according to the received MAC RAR.
  • the method further includes:
  • Sub-step 202-11 if the first MAC sub-PDU is a MAC sub-header including the back-off indication BI, and the cell that initiates the random access by the terminal has enabled the Msg1-based system message request function, and the pre-agreed is based on the Msg1
  • the system sub-message requesting the MAC sub-PDU is located after all the second MAC sub-PDUs, according to the preset byte length of the MAC sub-PDU including the MAC RAR, except for the first MAC of the entire MAC PDU.
  • the remainder of the sub-PDU is split to obtain each MAC sub-PDU containing the MAC RAR, and possibly the remainder of the byte length less than the MAC sub-PDU containing the MAC RAR, which may contain a response to the system message request of Msg1 MAC subPDU.
  • the method further includes:
  • Sub-step 202-12 parsing each MAC sub-PDU including the MAC RAR in parallel and parsing the MAC sub-PDU that may include responding to the Msg1-based system message request.
  • sub-step 202-12 further includes:
  • Sub-step 202-13 if the terminal simultaneously sends the Msg1-based system message request and another random access request, the terminal parses out the RAPID included in the MAC sub-header of one of the MAC sub-PDUs in the MAC sub-PDU including the MAC RAR.
  • the random access preamble sequence number preamble ID when the terminal sends the random access request Msg1 is consistent, the other MAC subPDUs including the MAC RAR are discarded;
  • Sub-step 202-14 if the terminal only sends the Msg1-based system message request, the terminal discards all the MAC sub-PDUs including the MAC RAR, parses only the remaining part, and obtains a response for the Msg1-based system message request;
  • Sub-step 202-15 if the terminal only sends a random access request that is not based on the Msg1 system message request, the terminal discards the remaining part of the MAC subPDU that may contain a response to the Msg1-based system message request, and the parallel parsing includes the MAC RAR If the RAPID included in the MAC sub-header of one of the MAC sub-PDUs is consistent with the random access preamble sequence number preamble ID when the terminal sends the random access request Msg1, all other MAC sub-PDUs are discarded.
  • the corresponding random access response MAC PDUs in the foregoing sub-steps 201-12 to 201-15 include a MAC sub PDU including BI, a MAC sub PDU including a MAC RAR, and a MAC sub PDU for an Msg1 based SI request response, and The MAC subPDU of the Msg1 based SI request response is placed after other MAC subPDUs.
  • the MAC PDU structure and terminal resolution processing sequence are as shown in FIG.
  • Step 1 The base station receives the random access request Msg1 sent by the terminal on the same time-frequency resource, and different terminals may send different preamble codes on the same time-frequency resource.
  • Step 2 The base station sends a random access response Msg2 to the terminal that sends the Msg1 on the same time-frequency resource.
  • multiple random access responses ie, MAC RAR
  • the base station may send a BI indication to perform random access congestion control, and if it receives a preamble reserved by the base station for the Msg1 based SI request, responds to the Msg1 based SI request;
  • Step 3 The base station receives the Msg3 according to the uplink resource allocated by the Msg2 and performs subsequent operations of the random access.
  • Branch 1 If the random access procedure of the Msg1 based SI request can be performed in parallel with other random access procedures, the specific steps are as follows.
  • Step 1 The terminal configures the random access resource according to the base station, and selects the PRACH and the preamble to initiate the random access. If the terminal initiates the Msg1 based SI request process, the terminal uses the preamble and/or PRACH resources reserved by the base station for the system message request.
  • Step 2 The terminal parses the MAC sub-header of the first MAC sub-PDU to determine that it contains BI.
  • Step 3 The terminal splits the remaining MAC PDU into an integer number of MAC sub-PDUs including the MAC RAR, and parses the MAC sub-PDUs in parallel. If the MAC sub-PDU is obtained for the terminal, the terminal parses the MAC sub-header of one of the MAC sub-PDUs. If the RAPID is the same as the preamble ID of the Msg1 sent by the terminal, the other MAC sub-PDUs containing the MAC RAR are discarded. At the same time, if the terminal sends the Msg1based SI request, the remaining parts of the split are parsed in parallel, and the response to the Msg1 based SI request is obtained. The remaining portion of the partition is smaller than the size of a MAC subPDU containing the MAC RAR.
  • Step 4 The terminal sends Msg3 and subsequent operations according to the received MAC RAR.
  • Branch 2 If the random access procedure of the Msg1based SI request cannot be performed in parallel with other random access procedures, the specific steps are as follows:
  • Step 1 The terminal configures the random access resource according to the base station, and selects the PRACH and the preamble to initiate the random access. If the terminal initiates the Msg1 based SI request process, the terminal uses the preamble and/or PRACH resources reserved by the base station for the system message request.
  • Step 2 The terminal parses the MAC sub-header of the first MAC sub-PDU to determine that it contains BI.
  • Step 3 If the random access request sent by the terminal is another random access request except the Msg1 based SI request, the terminal splits the remaining MAC PDU into an integer number of MAC subPDUs including the MAC RAR, and parses the MAC subPDUs in parallel. Obtaining the MAC sub PDU for the terminal, that is, the RAPID included in the MAC sub-header of one of the MAC sub-PDUs is consistent with the preamble ID of the Msg1 sent by the terminal, and the other MAC sub-PDUs including the MAC RAR are discarded, and the remaining after the split is discarded. section;
  • the terminal splits the remaining MAC PDUs into an integer number of MAC subPDUs including the MAC RAR and discards them, and the terminal only parses the remaining part after the splitting, and obtains the Msg1 based
  • the response of the SI request, the remaining portion of the split is smaller than the size of a MAC subPDU containing the MAC RAR.
  • Step 4 The terminal sends Msg3 and subsequent operations according to the received MAC RAR.
  • the terminal receives a random access response message sent by the base station, and parses the random access response message, where the media access control protocol data unit MAC PDU of the random access response message Included at least one medium access control sub-protocol data unit MAC sub-PDU, each of the MAC sub-PDUs including a MAC sub-header and a possible medium access control random access response MAC RAR corresponding to the MAC sub-header;
  • the MAC sub PDU is at least two, at least two of the MAC sub PDUs are sequentially arranged in the MAC PDU, so that the single terminal UE can quickly receive and parse the response to the random access request sent by the terminal, thereby reducing random access.
  • the media access control protocol data unit MAC PDU of the random access response message Included at least one medium access control sub-protocol data unit MAC sub-PDU, each of the MAC sub-PDUs including a MAC sub-header and a possible medium access control random access response MAC RAR corresponding
  • some embodiments of the present disclosure further provide a random access response apparatus, including: a sending module 301, configured to send a random access response message to a terminal, where the media of the random access response message
  • the access control protocol data unit MAC PDU includes at least one medium access control sub-protocol data unit MAC sub-PDU, each of the MAC sub-PDUs including a MAC sub-header and possibly a media access control corresponding to the MAC sub-header.
  • Incoming MAC RAR when the MAC subPDU is at least two, at least two of the MAC subPDUs are sequentially arranged in the MAC PDU.
  • the MAC sub PDU includes a first MAC sub PDU, and only the first MAC subhead is included in the first MAC sub PDU.
  • the first MAC subheader is a subheader including a fallback indication BI.
  • the first MAC subPDU is queued before other MAC subPDUs.
  • the first MAC subheader is a MAC subheader that responds to the Msg1 based system message request.
  • the first MAC subPDU is located at a predetermined location of a MAC PDU of the random access response message.
  • the predetermined location is a location before all the second MAC subPDUs, or a position after all the second MAC subPDUs, where the second MAC subPDU includes a MAC subheader and a corresponding one.
  • MAC RAR MAC resource assignment
  • the random access response apparatus of some embodiments of the present disclosure sends a random access response message to the terminal by the base station, where the medium access control protocol data unit MAC PDU of the random access response message includes at least one medium access control sub-protocol a data unit MAC subPDU, each of the MAC subPDUs including a MAC subheader and a possible medium access control random access response MAC RAR corresponding to the MAC subheader; when the MAC subPDU is at least two, at least The two MAC sub PDUs are sequentially arranged in the MAC PDU, which enables the base station gNB to quickly respond to random access requests originating from multiple terminals and multiple requirements.
  • the medium access control protocol data unit MAC PDU of the random access response message includes at least one medium access control sub-protocol a data unit MAC subPDU, each of the MAC subPDUs including a MAC subheader and a possible medium access control random access response MAC RAR corresponding to the MAC subheader; when the
  • the device is a device corresponding to the foregoing method embodiment, and all implementations in the foregoing method embodiments are applicable to the embodiment of the device, and the same technical effects can be achieved.
  • some embodiments of the present disclosure also provide a base station including a memory 420, a processor 400, a transceiver 410, a bus interface, and a computer program stored on the memory 420 and operable on the processor 400.
  • the processor 400 is configured to read a program in the memory 420, and perform the following process: sending a random access response message to the terminal, where the medium access control protocol data unit MAC PDU of the random access response message includes at least one a medium access control sub-protocol data unit MAC sub-PDU, each of the MAC sub-PDUs including a MAC sub-header and a possible medium access control random access response MAC RAR corresponding to the MAC sub-head; when the MAC sub-PDU is At least two, at least two of the MAC subPDUs are sequentially arranged in the MAC PDU.
  • the medium access control protocol data unit MAC PDU of the random access response message includes at least one a medium access control sub-protocol data unit MAC sub-PDU, each of the MAC sub-PDUs including a MAC sub-header and a possible medium access control random access response MAC RAR corresponding to the MAC sub-head; when the MAC sub-PDU is At least two, at least two
  • the bus architecture may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 400 and various circuits of memory represented by memory 420.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • the bus interface provides an interface.
  • Transceiver 410 can be a plurality of components, including a transmitter and a transceiver, providing means for communicating with various other devices on a transmission medium.
  • the processor 400 is responsible for managing the bus architecture and general processing, and the memory 420 can store data used by the processor 400 when performing operations.
  • the MAC sub PDU includes a first MAC sub PDU, and the first MAC sub PDU includes only the first MAC subheader.
  • the first MAC subheader is a subheader that includes a fallback indication BI.
  • the first MAC subPDU is queued before other MAC subPDUs.
  • the first MAC subheader is a MAC subheader that responds to the Msg1-based system message request.
  • the first MAC subPDU is located at a predetermined location of a MAC PDU of the random access response message.
  • the predetermined location is a location before all second MAC subPDUs, or a location after all second MAC subPDUs, where the second MAC subPDU includes a MAC subheader and corresponding MAC RAR.
  • some embodiments of the present disclosure further provide a random access response apparatus, including: a receiving module 501, configured to receive a random access response message sent by a base station, where the random access response message is
  • the medium access control protocol data unit MAC PDU includes at least one medium access control sub-protocol data unit MAC sub PDU, each of the MAC sub PDUs including a MAC sub-header and possibly a media access control corresponding to the MAC sub-header
  • the access response MAC RAR when the MAC subPDU is at least two, at least two of the MAC subPDUs are sequentially arranged in the MAC PDU.
  • the MAC sub PDU includes a first MAC sub PDU, and only the first MAC subhead is included in the first MAC sub PDU.
  • the first MAC subheader is a subheader including a fallback indication BI.
  • the first MAC subPDU is queued before other MAC subPDUs.
  • the first MAC subheader is a MAC subheader that responds to the Msg1-based system message request.
  • the first MAC subPDU is located at a predetermined position of a MAC PDU of the random access response message.
  • the predetermined location is a location before all the second MAC subPDUs, or a location after all the second MAC subPDUs, where the second MAC subPDU includes a MAC subheader and a corresponding one.
  • MAC RAR MAC resource assignment
  • the random access response device includes: a parsing module 502, configured to parse the random access response message after receiving the random access response message sent by the base station.
  • the parsing module 502 includes: a first parsing submodule 502-1, configured to parse the first MAC subPDU of the random access response message;
  • the merging module 502-2 is configured to: if the MAC sub-header of the first MAC sub-PDU includes a random access preamble sequence number RAPID, the MAC sub-PDU is a MAC sub-PDU including a MAC RAR, according to a preset MAC RAR.
  • the length of the MAC sub-PDU is split, and the entire MAC PDU is split to obtain each MAC sub-PDU including the MAC RAR; and the first parallel parsing sub-module 502-3 is used for parallel parsing of each MAC sub-PDU.
  • the parsing module 502 includes: a second splitting module 502-4, after parsing the first MAC subPDU of the random access response message, If the first MAC sub-PDU is a MAC sub-header including the back-off indication BI, and the cell that initiates the random access by the terminal does not enable the Msg1-based system message request function, according to the preset MAC sub-PDU including the MAC RAR Byte length, for the entire MAC PDU, the remaining part except the first MAC subPDU is split to obtain each MAC subPDU including the MAC RAR; the second parallel parsing sub-module 502-5 is used for Each MAC subPDU is parsed in parallel.
  • a second splitting module 502-4 after parsing the first MAC subPDU of the random access response message, If the first MAC sub-PDU is a MAC sub-header including the back-off indication BI, and the cell that initiates the random access by the terminal does not enable the Msg1-based system message request
  • the parsing module 502 includes: a second parsing submodule 502-6, after parsing the first MAC subPDU of the random access response message, If the first MAC subPDU is a MAC sub-header including the back-off indication BI, and the cell that initiates the random access by the terminal has enabled the Msg1-based system message request function, and pre-arranges to respond to the Msg1-based system message request.
  • the second MAC sub PDU of the random access response message is further parsed; the third parsing submodule 502-7 is configured to determine, if the second MAC sub PDU is included The third MAC subPDU of the random access response message is further parsed when the MAC sub-header responds to the Msg1-based system message request, and the third de-molecular module 502-8 is used for the third MAC
  • the first MAC sub PDU and the second MA are included in the entire MAC PDU according to a preset byte length of the MAC sub PDU including the MAC RAR.
  • the remaining part of the C sub PDU is split to obtain each MAC sub PDU including the MAC RAR; and the third parallel parsing submodule 5029 is used for parallel parsing of each MAC sub PDU.
  • the parsing module 502 includes: a first processing submodule 502-10, configured to parse one of the MAC RARs after performing parallel parsing on each MAC sub PDU
  • the MAC sub-PDU when the RAPID included in the MAC sub-header of the one of the MAC sub-PDUs is consistent with the random access preamble sequence preamble ID when the terminal sends the random access request Msg1, discards other MACs including the MAC RAR. subPDU.
  • the parsing module 502 includes: a fourth splitting module 502-11, after parsing the first MAC subPDU of the random access response message, If the first MAC subPDU is a MAC sub-header including the back-off indication BI, and the cell that initiates the random access by the terminal has enabled the Msg1-based system message request function, and the pre-agreed response to the Msg1-based system message request.
  • the MAC sub PDU is located after all the second MAC subPDUs, the remaining part of the entire MAC PDU except the first MAC sub PDU is performed according to a preset byte length of the MAC sub PDU including the MAC RAR.
  • the parsing module 502 includes: a fourth parsing submodule 502-12, configured to perform parallel parsing on each MAC sub PDU including a MAC RAR, respectively, and may include The system message of Msg1 requests the MAC subPDU to be parsed for parsing.
  • the parsing module 502 includes: a second processing submodule 502-13, configured to: if the terminal simultaneously sends an Msg1-based system message request and another random access request, If the RAPID included in the MAC sub-header of one of the MAC sub-PDUs is consistent with the random access preamble sequence number preamble ID when the terminal sends the random access request Msg1 in the MAC sub-PDU including the MAC RAR, the terminal discards The MAC sub-PDU including the MAC RAR; the third processing sub-module 502-14 is configured to: if the terminal only sends the Msg1-based system message request, the terminal discards all the MAC sub-PDUs including the MAC RAR, and only parses the remaining part, and obtains the The Msg1 system message requests the response; the fourth processing sub-module 502-15 is configured to: if the terminal only sends the non-Msg1-based system message request random access
  • the random access response apparatus of some embodiments of the present disclosure receives, by the terminal, a random access response message sent by the base station and parses the random access response message, where the medium access control protocol data unit MAC PDU of the random access response message Included at least one medium access control sub-protocol data unit MAC sub-PDU, each of the MAC sub-PDUs including a MAC sub-header and a possible medium access control random access response MAC RAR corresponding to the MAC sub-header;
  • the MAC sub PDU is at least two, at least two of the MAC sub PDUs are sequentially arranged in the MAC PDU, so that the single terminal UE can quickly receive and parse the response to the random access request sent by the terminal, thereby reducing random access. Into the delay, and achieve terminal power saving.
  • the random access response device is a device corresponding to the foregoing random access response method, and all implementation manners in the foregoing method embodiments are applicable to the embodiment of the device, and the same technical effect can be achieved. .
  • a terminal including a memory 620, a processor 600, a transceiver 610, a user interface 630, a bus interface, and is stored on the memory 620 and can be processed.
  • the protocol data unit MAC PDU includes at least one medium access control sub-protocol data unit MAC sub PDU, each of the MAC sub-PDUs including a MAC sub-header and possibly a media access control random access response MAC corresponding to the MAC sub-header RAR; when the MAC subPDU is at least two, at least two of the MAC subPDUs are sequentially arranged in the MAC PDU.
  • the bus architecture may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 600 and various circuits of memory represented by memory 620.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • the bus interface provides an interface.
  • Transceiver 610 can be a plurality of components, including a transmitter and a transceiver, providing means for communicating with various other devices on a transmission medium.
  • the user interface 630 may also be an interface capable of externally connecting the required devices, including but not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.
  • the processor 600 is responsible for managing the bus architecture and general processing, and the memory 620 can store data used by the processor 600 in performing operations.
  • the MAC sub PDU includes a first MAC sub PDU, and the first MAC sub PDU includes only the first MAC subheader.
  • the first MAC subheader is a subheader that includes a fallback indication BI.
  • the first MAC subPDU is queued before other MAC subPDUs.
  • the first MAC subheader is a MAC subheader that responds to the Msg1-based system message request.
  • the first MAC subPDU is located at a predetermined location of a MAC PDU of the random access response message.
  • the predetermined location is a location before all second MAC subPDUs, or a location after all second MAC subPDUs, where the second MAC subPDU includes a MAC subheader and corresponding MAC RAR.
  • the processor 600 is further configured to read a program in the memory 620, and perform the following steps: parsing the random access response message.
  • the processor 600 is further configured to read the program in the memory 620, and perform the following steps: parsing the first MAC subPDU of the random access response message; if the MAC sub-head of the first MAC sub-PDU includes random access The preamble sequence number RAPID, the MAC subPDU is a MAC sub PDU including a MAC RAR, and the entire MAC PDU is split according to a preset byte length of the MAC sub PDU including the MAC RAR, and each of the MAC PDUs is obtained.
  • MAC subPDU parallel parsing of each MAC subPDU.
  • the processor 600 is further configured to read the program in the memory 620, and perform the following steps: if the first MAC subPDU is a MAC sub-header including the back-off indication BI, and the cell that the terminal initiates random access is not enabled based on the Msg1
  • the system message request function splits the remaining part of the entire MAC PDU except the first MAC sub PDU according to the preset byte length of the MAC sub PDU including the MAC RAR, and obtains each of the included MACs. RAR's MAC subPDU; parallel parsing of each MAC subPDU.
  • the processor 600 is further configured to read the program in the memory 620, and perform the following steps: if the first MAC subPDU is a MAC sub-header including the back-off indication BI, and the cell that initiates the random access by the terminal is enabled based on the Msg1 The system message request function, and pre-arranging that the MAC sub PDU responding to the Msg1-based system message request is located before all the second MAC subPDUs, further parsing the second MAC subPDU of the random access response message; Determining, when the second MAC subPDU includes a MAC sub-header responding to the Msg1-based system message request, parsing the third MAC sub-PDU of the random access response message; if the third MAC sub-PDU includes the MAC In the RAR, the remaining part of the entire MAC PDU except the first MAC subPDU and the second MAC sub PDU is split according to the preset byte length of the MAC sub PDU including the MAC RAR.
  • the processor 600 is further configured to read the program in the memory 620, and perform the following steps: when parsing one of the MAC sub-PDUs including the MAC RAR, the RAPID included in the MAC sub-header in the one of the MAC sub-PDUs is sent by the terminal When the random access preamble sequence number preamble ID of the random access request Msg1 is the same, the other MAC subPDUs including the MAC RAR are discarded.
  • the processor 600 is further configured to read the program in the memory 620, and perform the following steps: if the first MAC subPDU is a MAC subheader including the backoff indication BI, and the cell that the terminal initiates random access is enabled based on the Msg1 System message request function, and pre-arranged that the MAC subPDU responding to the Msg1-based system message request is located after all the second MAC subPDUs, according to the preset byte length of the MAC sub-PDU including the MAC RAR, In the MAC PDU, the remaining part except the first MAC subPDU is split to obtain each MAC sub PDU including the MAC RAR, and possibly the remaining part of the byte length smaller than the MAC sub PDU including the MAC RAR, The remainder may contain a MAC sub PDU that responds to the Msg1 system message request.
  • the processor 600 is further configured to read the program in the memory 620, and perform the following steps: performing parallel parsing on each MAC sub PDU including the MAC RAR and parsing the MAC sub PDU that may include responding to the Msg1-based system message request.
  • the processor 600 is further configured to read the program in the memory 620, and perform the following steps: if the terminal simultaneously sends the Msg1-based system message request and another random access request, the terminal parses out the MAC sub-PDU in the MAC RAR.
  • the terminal discards all MAC subPDUs including the MAC RAR, parses only the remaining part, and obtains a response to the Msg1-based system message request; if the terminal only sends a random connection based on the Msg1-based system message request If the request is received, the terminal discards the remaining portion of the MAC sub-PDU that may include a response to the Msg1-based system message request, parses the MAC sub-PDU including the MAC RAR in parallel, and parses out the RAPID included in the MAC sub-header of one of the MAC sub-PDUs.
  • the random access preamble sequence number preamble ID when the
  • a computer readable storage medium having stored thereon a computer program, the program being executed by the processor to: receive a random access response message sent by a base station, where
  • the medium access control protocol data unit MAC PDU of the random access response message includes at least one medium access control sub-protocol data unit MAC sub PDU, each of the MAC subPDUs including a MAC sub-header and possibly a MAC sub-header Corresponding media access control random access response MAC RAR; when the MAC subPDU is at least two, at least two of the MAC subPDUs are sequentially arranged in the MAC PDU.
  • a computer readable storage medium may be a volatile storage medium or a nonvolatile storage medium. It should be understood that the size of the sequence numbers of the above processes does not imply a sequence of executions, and the order of execution of the processes should be determined by its function and internal logic, and should not be construed as limiting the implementation of some embodiments of the present disclosure.
  • modules, sub-modules, units, and algorithm steps of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods to implement the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present disclosure.

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Abstract

本公开提供一种随机接入响应方法、装置、基站及终端。该方法包括：向终端发送随机接入响应消息，其中随机接入响应消息的媒体接入控制协议数据单元MAC PDU包括至少一个媒体接入控制子协议数据单元MAC subPDU，每个MAC subPDU包含一个MAC子头和可能的与该MAC子头相对应的媒体接入控制随机接入响应MAC RAR；当MAC subPDU为至少两个时，至少两个的MAC subPDU在MAC PDU中依次顺序排列。

Description

随机接入响应方法、装置、基站及终端
相关申请的交叉引用
本申请主张在2017年8月11日在中国提交的中国专利申请号No.201710687888.4的优先权，其全部内容通过引用包含于此。
技术领域
本公开涉及通信技术领域，尤其涉及一种随机接入响应方法、装置、基站及终端。
背景技术
LTE(长期演进，Long Term Evolution)系统和NR(新的接入，New Radio)系统的随机接入分为竞争随机接入和非竞争随机接入两种。
LTE系统的竞争随机接入用于：1)终端初始接入；2)RRC(无线资源控制，Radio Resource Control)连接重建、切换；3)非同步状态下RRC连接态时下行数据到达；4)RRC连接态时上行数据到达；5)RRC连接态时的定位。NR系统还引入系统消息请求、非激活态的UE(用户终端，User Equipment)恢复连接等。竞争随机接入过程如图1所示，主要分为四步：
Msg1：UE选择随机接入前导码Preamble和随机接入资源PRACH(物理随机接入信道，Physical Random Access Channel)，在选择的PRACH资源上向基站发送所选的随机接入前导码Preamble。在NR系统中，为基于Msg1的系统消息请求“Msg1based SI request”预留特定的Preamble和/或PRACH资源。
Msg2：基站接收到随机接入请求Msg1，向UE发送随机接入响应，随机接入响应中包含上行定时提前量、为Msg3分配的上行资源UL grant、网络侧分配的临时C-RNTI(小区无线网络临时标识，Cell Radio Network Temporary Identifier)。承载Msg2调度消息的PDCCH(物理下行控制信道，Physical Downlink Control Channel)用RA-RNTI(随机接入无线网络临时标识，Random Access-Radio Network Temporary Identifier)加扰，Msg2中还携带Preamble ID， UE通过RA-RNTI和Preamble ID确定该Msg2是与其发送的Msg1对应的。在NR系统中，针对基于Msg1的系统消息请求，Msg2中只包含于Msg1对应的Preamble ID信息，没有其他内容。并且对于基于Msg1的系统消息请求场景，随机接入过程到Msg2就结束了，即若接收到的Msg2中包含与Msg1发送的Preamble对应的Preamble ID，则认为基于Msg1的系统消息请求过程完成。
Msg3：UE在Msg2指定的UL grant上发送上行传输，不同随机接入原因Msg3上行传输的内容不同，比如对于初始接入，Msg3传输的是RRC连接建立请求。
Msg4：竞争解决消息，UE根据Msg4可以判断随机接入是否成功。对于初始接入UE，竞争解决成功后临时C-RNTI自动转化为UE在该小区的唯一UE标识C-RNTI。
非竞争随机接入用于切换、下行数据到达、定位和获取上行定时。其过程如图2所示，主要分为三步：
Msg0：基站向UE分配用于非竞争随机接入的专用Preamble以及随机接入使用的PRACH资源。
Msg1：UE根据Msg0的指示，在指定的PRACH资源上向基站发送指定的专用Preamble。基站接收到Msg1后根据Msg1计算上行定时提前量TA。
Msg2：基站向UE发送随机接入响应，随机接入响应中包含定时提前量信息、后续上行传输资源分配UL grant，定时提前量用于UE后续上行传输的定时关系。
在LTE系统中，随机接入响应消息的MAC PDU(媒体接入控制协议数据单元，Media Access Control Protocol Data Unit)包括一个MAC头和可能的若干个MAC RAR(媒体接入控制随机接入响应，Media Access Control Random Access Response)。MAC头由一个或多个MAC子头构成，一个MAC PDU中最多出现一个BI(回退指示，Back off Indicator)子头，该子头不与MAC RAR对应，其他每个MAC子头对应一个MAC RAR。
LTE系统中MAC子头格式有两种，一种是携带BI的，一种是携带RAPID(随机接入前导码序号，Random Access Preamble ID)的，携带Preamble ID 的子头总是和一个MAC RAR对应。具体格式如图3～图6所示。
NR系统尚未定义随机接入响应MAC PDU格式，一种方式是沿用LTE的格式。而在LTE系统中，UE必须要顺序解析MAC头中的每个MAC子头，并在解读完子头后才能接收MAC RAR，若针对该UE的MAC RAR比较靠后，UE还需要顺序丢弃其他MAC RAR，一直到解读到自己的MAC RAR为止。该方法会造成处理效率低下，Msg2到Msg3之间时延长，且增加终端耗电的问题。
发明内容
本公开的目的在于提供一种随机接入响应方法、装置、基站及终端，以解决相关解析随机接入响应消息的处理效率低下，且Msg2到Msg3之间时延长，且增加终端耗电的问题。
第一方面，本公开的一些实施例提供一种随机接入响应方法，该方法应用于基站，并且包括：向终端发送随机接入响应消息，其中所述随机接入响应消息的媒体接入控制协议数据单元MAC PDU包括至少一个媒体接入控制子协议数据单元MAC subPDU，每个所述MAC subPDU包含一个MAC子头和可能的与该MAC子头相对应的媒体接入控制随机接入响应MAC RAR；当所述MAC subPDU为至少两个时，至少两个的所述MAC subPDU在MAC PDU中依次顺序排列。
其中，所述MAC subPDU包括第一MAC subPDU，所述第一MAC subPDU中仅包括第一MAC子头。
其中，所述第一MAC子头为包含回退指示BI的子头。
其中，在所述随机接入响应消息中，所述第一MAC subPDU排在其他MAC subPDU之前。
其中，所述第一MAC子头为针对基于Msg1的系统消息请求进行响应的MAC子头。
其中，所述第一MAC subPDU位于所述随机接入响应消息的MAC PDU的预定位置。
其中，所述预定位置为排在全部的第二MAC subPDU之前的位置，或者 为排在全部的第二MAC subPDU之后的位置，其中所述第二MAC subPDU中包括MAC子头和相对应的MAC RAR。
第二方面，本公开的一些实施例还提供了随机接入响应方法，该方法应用于终端，并且包括：接收基站发送的随机接入响应消息，其中所述随机接入响应消息的媒体接入控制协议数据单元MAC PDU包括至少一个媒体接入控制子协议数据单元MAC subPDU，每个所述MAC subPDU包含一个MAC子头和可能的与该MAC子头相对应的媒体接入控制随机接入响应MAC RAR；当所述MAC subPDU为至少两个时，至少两个的所述MAC subPDU在MAC PDU中依次顺序排列。
其中，所述MAC subPDU包括第一MAC subPDU，所述第一MAC subPDU中仅包括第一MAC子头。
其中，所述第一MAC子头为包含回退指示BI的子头。
其中，在所述随机接入响应消息中，所述第一MAC subPDU排在其他MAC subPDU之前。
其中，所述第一MAC子头为针对基于Msg1的系统消息请求进行响应的MAC子头。
其中，所述第一MAC subPDU位于所述随机接入响应消息的MAC PDU的预定位置。
其中，所述预定位置为排在全部的第二MAC subPDU之前的位置，或者为排在全部的第二MAC subPDU之后的位置，其中所述第二MAC subPDU中包括MAC子头和相对应的MAC RAR。
其中，接收基站发送的随机接入响应消息的步骤之后，所述方法还包括：对所述随机接入响应消息进行解析。
其中，对所述随机接入响应消息进行解析的步骤，包括：对所述随机接入响应消息的第一个MAC subPDU进行解析；若第一个MAC subPDU的MAC子头中包括随机接入前导码序号RAPID，则该MAC subPDU为包含MAC RAR的MAC subPDU，依据预先设定的包含MAC RAR的MAC subPDU的字节长度，对整个的所述MAC PDU进行拆分，获得每一个包含MAC RAR的MAC subPDU；对每一MAC subPDU进行并行解析。
其中，所述对所述随机接入响应消息的第一个MAC subPDU进行解析的步骤之后，所述方法还包括：若第一个MAC subPDU为包括回退指示BI的MAC子头，且所述终端发起随机接入的小区未开启基于Msg1的系统消息请求功能，则依据预先设定的包含MAC RAR的MAC subPDU的字节长度，对整个的所述MAC PDU中，除第一个MAC subPDU外的剩余部分进行拆分，获得每一个包含MAC RAR的MAC subPDU；对每一MAC subPDU进行并行解析。
其中，所述对所述随机接入响应消息的第一个MAC subPDU进行解析的步骤之后，所述方法还包括：若第一个MAC subPDU为包括回退指示BI的MAC子头，且所述终端发起随机接入的小区已开启基于Msg1的系统消息请求功能，且预先约定针对基于Msg1的系统消息请求进行响应的MAC subPDU位于全部的第二MAC subPDU之前时，则进一步对所述随机接入响应消息的第二个MAC subPDU进行解析；若确定第二个MAC subPDU包括针对基于Msg1的系统消息请求进行响应的MAC子头时，则进一步对所述随机接入响应消息的第三个MAC subPDU进行解析；若第三个MAC subPDU中包括MAC RAR时，则依据预先设定的包含MAC RAR的MAC subPDU的字节长度，对整个的所述MAC PDU中，除第一个MAC subPDU和第二个MAC subPDU外的剩余部分进行拆分，获得每一个包含MAC RAR的MAC subPDU；对每一MAC subPDU进行并行解析。
其中，所述对每一MAC subPDU进行并行解析的步骤之后，所述方法还包括：当解析其中一个包含MAC RAR的MAC subPDU时，所述其中一个MAC subPDU中的MAC子头所包含的RAPID与所述终端发送随机接入请求Msg1时的随机接入前导码序号preamble ID一致时，则丢弃其他包含MAC RAR的MAC subPDU。
其中，所述对所述随机接入响应消息的第一个MAC subPDU进行解析的步骤之后，所述方法还包括：若第一个MAC subPDU中为包括回退指示BI的MAC子头，且所述终端发起随机接入的小区已开启基于Msg1的系统消息请求功能，且预先约定针对基于Msg1的系统消息请求进行响应的MAC subPDU位于全部的第二MAC subPDU之后时，则依据预先设定的包含MAC  RAR的MAC subPDU的字节长度，对整个的所述MAC PDU中，除第一个MAC subPDU外的剩余部分进行拆分，获得每一个包含MAC RAR的MAC subPDU，以及可能的小于包含MAC RAR的MAC subPDU的字节长度的剩余部分，该剩余部分可能包含针对Msg1的系统消息请求进行响应的MAC subPDU。
其中，所述获得每一个包含MAC RAR的MAC subPDU的步骤之后，所述方法还包括：分别对包括MAC RAR的每一个MAC subPDU进行并行解析以及对可能包括针对基于Msg1的系统消息请求进行响应的MAC subPDU进行解析。
其中，所述方法还包括：若终端同时发送了基于Msg1的系统消息请求和另一个随机接入请求，终端若在包含MAC RAR的MAC subPDU中解析出其中一个MAC subPDU的MAC子头中所包含的RAPID与所述终端发送随机接入请求Msg1时的随机接入前导码序号preamble ID一致时，则丢弃其他包含MAC RAR的MAC subPDU；若终端只发送了基于Msg1的系统消息请求，则终端丢弃所有包含MAC RAR的MAC subPDU，只解析剩余部分，获取针对基于Msg1的系统消息请求进行的响应；若终端只发送了非基于Msg1的系统消息请求的随机接入请求，则终端丢弃可能包含针对基于Msg1的系统消息请求进行响应的MAC subPDU的剩余部分，并行解析包含MAC RAR的MAC subPDU，若解析出其中一个MAC subPDU的MAC子头中所包含的RAPID与所述终端发送随机接入请求Msg1时的随机接入前导码序号preamble ID一致时，则丢弃其他全部MAC subPDU。
第三方面，本公开的一些实施例还提供了一种随机接入响应装置，应用于基站，包括：发送模块，用于向终端发送随机接入响应消息，其中所述随机接入响应消息的媒体接入控制协议数据单元MAC PDU包括至少一个媒体接入控制子协议数据单元MAC subPDU，每个所述MAC subPDU包含一个MAC子头和可能的与该MAC子头相对应的媒体接入控制随机接入响应MAC RAR；当所述MAC subPDU为至少两个时，至少两个的所述MAC subPDU在MAC PDU中依次顺序排列。
其中，所述MAC subPDU包括第一MAC subPDU，所述第一MAC  subPDU中仅包括第一MAC子头。
其中，所述第一MAC子头为包含回退指示BI的子头。
其中，在所述随机接入响应消息中，所述第一MAC subPDU排在其他MAC subPDU之前。
其中，所述第一MAC子头为针对基于Msg1的系统消息请求进行响应的MAC子头。
其中，所述第一MAC subPDU位于所述随机接入响应消息的MAC PDU的预定位置。
其中，所述预定位置为排在全部的第二MAC subPDU之前的位置，或者为排在全部的第二MAC subPDU之后的位置，其中所述第二MAC subPDU中包括MAC子头和相对应的MAC RAR。
第四方面，本公开的一些实施例还提供了一种基站，包括存储器、处理器及存储在存储器上并可在处理器上运行的计算机程序，所述处理器执行所述计算机程序时实现以下步骤：向终端发送随机接入响应消息，其中所述随机接入响应消息的媒体接入控制协议数据单元MAC PDU包括至少一个媒体接入控制子协议数据单元MAC subPDU，每个所述MAC subPDU包含一个MAC子头和可能的与该MAC子头相对应的媒体接入控制随机接入响应MAC RAR；当所述MAC subPDU为至少两个时，至少两个的所述MAC subPDU在MAC PDU中依次顺序排列。
第五方面，本公开的一些实施例还提供了一种计算机可读存储介质，其上存储有计算机程序，该计算机程序被处理器执行时实现以下步骤：向终端发送随机接入响应消息，其中所述随机接入响应消息的媒体接入控制协议数据单元MAC PDU包括至少一个媒体接入控制子协议数据单元MAC subPDU，每个所述MAC subPDU包含一个MAC子头和可能的与该MAC子头相对应的媒体接入控制随机接入响应MAC RAR；当所述MAC subPDU为至少两个时，至少两个的所述MAC subPDU在MAC PDU中依次顺序排列。
第六方面，本公开的一些实施例还提供了一种随机接入响应装置，应用于终端，包括：接收模块，用于接收基站发送的随机接入响应消息，其中所述随机接入响应消息的媒体接入控制协议数据单元MAC PDU包括至少一个 媒体接入控制子协议数据单元MAC subPDU，每个所述MAC subPDU包含一个MAC子头和可能的与该MAC子头相对应的媒体接入控制随机接入响应MAC RAR；当所述MAC subPDU为至少两个时，至少两个的所述MAC subPDU在MAC PDU中依次顺序排列。
其中，所述MAC subPDU包括第一MAC subPDU，所述第一MAC subPDU中仅包括第一MAC子头。
其中，所述第一MAC子头为包含回退指示BI的子头。
其中，在所述随机接入响应消息中，所述第一MAC subPDU排在其他MAC subPDU之前。
其中，所述第一MAC子头为针对基于Msg1的系统消息请求进行响应的MAC子头。
其中，所述第一MAC subPDU位于所述随机接入响应消息的MAC PDU的预定位置。
其中，所述预定位置为排在全部的第二MAC subPDU之前的位置，或者为排在全部的第二MAC subPDU之后的位置，其中所述第二MAC subPDU中包括MAC子头和相对应的MAC RAR。
其中，所述装置还包括：解析模块，用于接收基站发送的随机接入响应消息之后，对所述随机接入响应消息进行解析。
其中，所述解析模块包括：第一解析子模块，用于对所述随机接入响应消息的第一个MAC subPDU进行解析；第一拆分子模块，用于若第一个MAC subPDU的MAC子头中包括随机接入前导码序号RAPID，则该MAC subPDU为包含MAC RAR的MAC subPDU，依据预先设定的包含MAC RAR的MAC subPDU的字节长度，对整个的所述MAC PDU进行拆分，获得每一个包含MAC RAR的MAC subPDU；第一并行解析子模块，用于对每一MAC subPDU进行并行解析。
其中，所述解析模块还包括：第二拆分子模块，用于在对所述随机接入响应消息的第一个MAC subPDU进行解析之后，若第一个MAC subPDU为包括回退指示BI的MAC子头，且所述终端发起随机接入的小区未开启基于Msg1的系统消息请求功能，则依据预先设定的包含MAC RAR的MAC  subPDU的字节长度，对整个的所述MAC PDU中，除第一个MAC subPDU外的剩余部分进行拆分，获得每一个包含MAC RAR的MAC subPDU；第二并行解析子模块，用于对每一MAC subPDU进行并行解析。
其中，所述解析模块还包括：第二解析子模块，用于在对所述随机接入响应消息的第一个MAC subPDU进行解析之后，若第一个MAC subPDU为包括回退指示BI的MAC子头，且所述终端发起随机接入的小区已开启基于Msg1的系统消息请求功能，且预先约定针对基于Msg1的系统消息请求进行响应的MAC subPDU位于全部的第二MAC subPDU之前时，则进一步对所述随机接入响应消息的第二个MAC subPDU进行解析；第三解析子模块，用于若确定第二个MAC subPDU包括针对基于Msg1的系统消息请求进行响应的MAC子头时，则进一步对所述随机接入响应消息的第三个MAC subPDU进行解析；第三拆分子模块，用于若第三个MAC subPDU中包括MAC RAR时，则依据预先设定的包含MAC RAR的MAC subPDU的字节长度，对整个的所述MAC PDU中，除第一个MAC subPDU和第二个MAC subPDU外的剩余部分进行拆分，获得每一个包含MAC RAR的MAC subPDU；第三并行解析子模块，用于对每一MAC subPDU进行并行解析。
其中，所述解析模块还包括：第一处理子模块，用于在对每一MAC subPDU进行并行解析之后，当解析其中一个包含MAC RAR的MAC subPDU时，所述其中一个MAC subPDU中的MAC子头所包含的RAPID与所述终端发送随机接入请求Msg1时的随机接入前导码序号preamble ID一致时，则丢弃其他包含MAC RAR的MAC subPDU。
其中，所述解析模块还包括：第四拆分子模块，用于在对所述随机接入响应消息的第一个MAC subPDU进行解析之后，若第一个MAC subPDU中为包括回退指示BI的MAC子头，且所述终端发起随机接入的小区已开启基于Msg1的系统消息请求功能，且预先约定针对基于Msg1的系统消息请求进行响应的MAC subPDU位于全部的第二MAC subPDU之后时，则依据预先设定的包含MAC RAR的MAC subPDU的字节长度，对整个的所述MAC PDU中，除第一个MAC subPDU外的剩余部分进行拆分，获得每一个包含MAC RAR的MAC subPDU，以及可能的小于包含MAC RAR的MAC subPDU的 字节长度的剩余部分，该剩余部分可能包含针对Msg1的系统消息请求进行响应的MAC subPDU。
其中，所述解析模块还包括：第四解析子模块，用于分别对包括MAC RAR的每一个MAC subPDU进行并行解析以及对可能包括针对基于Msg1的系统消息请求进行响应的MAC subPDU进行解析。
其中，所述解析模块还包括：第二处理子模块，用于若终端同时发送了基于Msg1的系统消息请求和另一个随机接入请求，终端若在包含MAC RAR的MAC subPDU中解析出其中一个MAC subPDU的MAC子头中所包含的RAPID与所述终端发送随机接入请求Msg1时的随机接入前导码序号preamble ID一致时，则丢弃其他包含MAC RAR的MAC subPDU；第三处理子模块，用于若终端只发送了基于Msg1的系统消息请求，则终端丢弃所有包含MAC RAR的MAC subPDU，只解析剩余部分，获取针对基于Msg1的系统消息请求进行的响应；第四处理子模块，用于若终端只发送了非基于Msg1的系统消息请求的随机接入请求，则终端丢弃可能包含针对基于Msg1的系统消息请求进行响应的MAC subPDU的剩余部分，并行解析包含MAC RAR的MAC subPDU，若解析出其中一个MAC subPDU的MAC子头中所包含的RAPID与所述终端发送随机接入请求Msg1时的随机接入前导码序号preamble ID一致时，则丢弃其他全部MAC subPDU。
第七方面，本公开的一些实施例还提供了一种终端，包括存储器、处理器及存储在存储器上并可在处理器上运行的计算机程序，所述处理器执行所述计算机程序时实现以下步骤：接收基站发送的随机接入响应消息，其中所述随机接入响应消息的媒体接入控制协议数据单元MAC PDU包括至少一个媒体接入控制子协议数据单元MAC subPDU，每个所述MAC subPDU包含一个MAC子头和可能的与该MAC子头相对应的媒体接入控制随机接入响应MAC RAR；当所述MAC subPDU为至少两个时，至少两个的所述MAC subPDU在MAC PDU中依次顺序排列。
第八方面，本公开的一些实施例还提供了一种计算机可读存储介质，其上存储有计算机程序，该计算机程序被处理器执行时实现以下步骤：接收基站发送的随机接入响应消息，其中所述随机接入响应消息的媒体接入控制协 议数据单元MAC PDU包括至少一个媒体接入控制子协议数据单元MAC subPDU，每个所述MAC subPDU包含一个MAC子头和可能的与该MAC子头相对应的媒体接入控制随机接入响应MAC RAR；当所述MAC subPDU为至少两个时，至少两个的所述MAC subPDU在MAC PDU中依次顺序排列。
总的来说，本公开可能有三种类型的MAC subPDU，一种是只包括含有BI的MAC子头的MAC subPDU，即第一类第一MAC subPDU；第二种是只包括含有RAPID的MAC子头的MAC subPDU，即第二类第一MAC subPDU，该RAPID与为基于Msg1系统消息请求预留的preamble ID一致；第三种是同时包括MAC子头和MAC RAR的MAC subPDU，即第二MAC subPDU。每个MAC subPDU的内容相互完全独立。
在本公开的上述顺序发生的步骤中，如果前一步解析不成功，直接跳到顺序的下一步，直到达到解析流程的末尾。
本公开的一些实施例具有以下有益效果：
本公开的一些实施例的上述技术方案，通过基站向终端发送随机接入响应消息，终端接收基站发送的随机接入响应消息并解析该随机接入响应消息，其中，随机接入响应消息的媒体接入控制协议数据单元MAC PDU包括至少一个媒体接入控制子协议数据单元MAC subPDU，每个所述MAC subPDU包含一个MAC子头和可能的与该MAC子头相对应的媒体接入控制随机接入响应MAC RAR；当所述MAC subPDU为至少两个时，至少两个的所述MAC subPDU在MAC PDU中依次顺序排列，对于基站gNB，可以在一个MAC PDU中响应来源于多个终端、多种需求的随机接入请求，既能实现随机接入响应的快速反馈，还能有效节约时频资源；对于终端UE，利用本公开特有的相互独立的MAC subPDU设计，使得单个终端UE可以快速拆分MAC PDU，并行解析MAC subPDU，从而快速获取针对本终端的随机接入请求的响应，丢弃冗余信息，既降低随机接入时延，又实现终端省电。
附图说明
图1为LTE系统和NR系统的竞争随机接入的流程图；
图2为LTE系统和NR系统的非竞争随机接入的流程图；
图3为LTE系统随机接入响应消息的MAC PDU结构示意图；
图4为图3中携带RAPID的MAC子头的结构示意图；
图5为图3中携带BI的MAC子头的结构示意图；
图6为图3中MAC RARA的结构示意图；
图7为本公开的一些实施例的随机接入响应方法的工作流程图之一；
图8为本公开的随机接入响应消息的MAC PDU结构示意图；
图9为本公开针对Msg1based SI request响应的MAC subPDU在MAC PDU中的位置示意图之一；
图10为本公开针对Msg1based SI request响应的MAC subPDU在MAC PDU中的位置示意图之二；
图11为本公开的一些实施例的随机接入响应方法的工作流程图之二；
图12为本公开的随机接入响应消息的MAC PDU中只有包含MAC RAR的MAC subPDU的结构示意图；
图13为本公开的随机接入响应消息的MAC PDU中有包含BI的MAC subPDU和包含MAC RAR的MAC subPDU的结构示意图；
图14为本公开的随机接入响应消息的MAC PDU中有包含BI的MAC subPDU、包含MAC RAR的MAC subPDU和针对Msg1based SI request响应的MAC subPDU的结构示意图之一；
图15为本公开随机接入响应消息的MAC PDU中有包含BI的MAC subPDU、包含MAC RAR的MAC subPDU和针对Msg1based SI request响应的MAC subPDU的结构示意图之二；
图16为本公开的一些实施例的随机接入响应装置的模块示意图之一；
图17为本公开的一些实施例的基站的结构框图；
图18为本公开的一些实施例的随机接入响应装置的模块示意图之二；以及
图19为本公开的一些实施例的终端的结构框图。
具体实施方式
下面将结合本公开的一些实施例中的附图，对本公开的一些实施例中的 技术方案进行清楚、完整地描述，显然，所描述的实施例是本公开一部分实施例，而不是全部的实施例。基于本公开中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本公开保护的范围。
本公开的一些实施例提供了一种随机接入响应方法、装置、基站及终端，解决了相关技术中解析随机接入响应消息的处理效率低下，且Msg2到Msg3之间时延长，且增加终端耗电的问题。
如图7所示，本公开的一些实施例提供一种随机接入响应方法，该方法应用于基站并且包括步骤101。
步骤101，向终端发送随机接入响应消息，其中所述随机接入响应消息的媒体接入控制协议数据单元MAC PDU包括至少一个媒体接入控制子协议数据单元MAC subPDU，每个所述MAC subPDU包含一个MAC子头和可能的与该MAC子头相对应的媒体接入控制随机接入响应MAC RAR；当所述MAC subPDU为至少两个时，至少两个的所述MAC subPDU在MAC PDU中依次顺序排列。
这里，本公开定义了一种MAC PDU结构，如图8所示。
具体的，该MAC PDU中每个MAC子头及其对应的MAC RAR组成一个MAC子PDU，即MAC subPDU；若没有对应的MAC RAR，则该MAC子头独立组成一个MAC子PDU，所有MAC子PDU顺序排列。
本公开的一些实施例的随机接入响应方法，通过基站向终端发送随机接入响应消息，其中，随机接入响应消息的媒体接入控制协议数据单元MAC PDU包括至少一个媒体接入控制子协议数据单元MAC subPDU，每个所述MAC subPDU包含一个MAC子头和可能的与该MAC子头相对应的媒体接入控制随机接入响应MAC RAR；当所述MAC subPDU为至少两个时，至少两个的所述MAC subPDU在MAC PDU中依次顺序排列，能够使基站gNB快速响应来源于多个终端、多种需求的随机接入请求。
可选的，所述MAC subPDU包括第一MAC subPDU，所述第一MAC subPDU中仅包括第一MAC子头。
具体的，所述第一MAC子头为包含回退指示BI的子头。
进一步的，在所述随机接入响应消息中，所述第一MAC subPDU排在其他MAC subPDU之前。
这里，第一MAC subPDU中包含BI的子头，该第一MAC subPDU排在MAC PDU的最前面。
可选的，所述第一MAC子头为针对基于Msg1的系统消息请求进行响应的MAC子头。
需要说明的，NR系统中除了包含BI的MAC子头和与MAC RAR对应的子头，还有一种情况是针对Msg1based SI request的响应，该响应的MAC子头格式与对应于MAC RAR的MAC子头格式相同，不同在于该MAC子头中没有对应的MAC RAR。
也就是说，针对Msg1based SI request进行响应的MAC子头独立组成一个只包含MAC子头的MAC subPDU。
这里，所述第一MAC subPDU位于所述随机接入响应消息的MAC PDU的预定位置。
具体的，所述预定位置为排在全部的第二MAC subPDU之前的位置，或者为排在全部的第二MAC subPDU之后的位置，其中所述第二MAC subPDU中包括MAC子头和相对应的MAC RAR。
如图9所示，为针对Msg1based SI request响应的MAC subPDU在MAC PDU中的位置示意图之一。
需说明的是，该MAC PDU中第一个MAC subPDU是包含BI的MAC子头；若没有BI指示，该MAC subPDU可以不存在；第二个MAC subPDU是对Msg1based SI request响应的MAC subPDU；后面的每个MAC subPDU都是针对发送对应前导码preamble的UE进行的随机接入响应，即后面的每个MAC subPDU中包括MAC子头和相对应的MAC RAR。
如图10所示，为针对Msg1based SI request响应的MAC subPDU在MAC PDU中的位置示意图之二。
需说明的是，该MAC PDU中第一个MAC subPDU是包含BI的MAC子头，若没有BI指示，该MAC subPDU可以不存在；后续是包含MAC RAR的MAC subPDU，其中每个MAC subPDU都是针对发送对应前导码preamble 的UE进行的随机接入响应；在包含MAC RAR的MAC subPDU之后，是针对Msg1based SI request响应的MAC subPDU。
也就是，针对Msg1based SI request响应的MAC subPDU排在全部的包含MAC RAR的MAC subPDU之后的位置。
本公开的一些实施例的随机接入响应方法，通过基站向终端发送随机接入响应消息，终端接收基站发送的随机接入响应消息并解析该随机接入响应消息，其中，随机接入响应消息的媒体接入控制协议数据单元MAC PDU包括至少一个媒体接入控制子协议数据单元MAC subPDU，每个所述MAC subPDU包含一个MAC子头和可能的与该MAC子头相对应的媒体接入控制随机接入响应MAC RAR；当所述MAC subPDU为至少两个时，至少两个的所述MAC subPDU在MAC PDU中依次顺序排列，不仅能够使基站gNB快速响应来源于多个终端、多种需求的随机接入请求，还能够使得单个终端UE快速接收和解析出针对本终端发送的随机接入请求的响应，既降低随机接入时延，又实现终端省电。
如图11所示，本公开的一些实施例还提供一种随机接入响应方法，该方法应用于终端并且包括步骤201。
步骤201，接收基站发送的随机接入响应消息，其中所述随机接入响应消息的媒体接入控制协议数据单元MAC PDU包括至少一个媒体接入控制子协议数据单元MAC subPDU，每个所述MAC subPDU包含一个MAC子头和可能的与该MAC子头相对应的媒体接入控制随机接入响应MAC RAR；当所述MAC subPDU为至少两个时，至少两个的所述MAC subPDU在MAC PDU中依次顺序排列。
这里，本公开定义了一种MAC PDU结构，如图8所示。具体结构组成详见基站侧随机接入响应方法实施例部分的阐述，这里不再赘述，
本公开的一些实施例的随机接入响应方法，通过终端接收基站发送的随机接入响应消息并解析该随机接入响应消息，其中，随机接入响应消息的媒体接入控制协议数据单元MAC PDU包括至少一个媒体接入控制子协议数据单元MAC subPDU，每个所述MAC subPDU包含一个MAC子头和可能的与该MAC子头相对应的媒体接入控制随机接入响应MAC RAR；当所述MAC  subPDU为至少两个时，至少两个的所述MAC subPDU在MAC PDU中依次顺序排列，使得单个终端UE能够快速接收和解析出针对本终端发送的随机接入请求的响应，既降低随机接入时延，又实现终端省电。
可选的，所述MAC subPDU包括第一MAC subPDU，所述第一MAC subPDU中仅包括第一MAC子头。
具体的，所述第一MAC子头为包含回退指示BI的子头。
进一步的，在所述随机接入响应消息中，所述第一MAC subPDU排在其他MAC subPDU之前。
这里，第一MAC subPDU中包含BI的子头，该第一MAC subPDU排在MAC PDU的最前面。
可选的，所述第一MAC子头为针对基于Msg1的系统消息请求进行响应的MAC子头。
需要说明的，NR系统中除了包含BI的MAC子头和与MAC RAR对应的子头，还有一种情况是针对Msg1based SI request的响应，该响应的MAC子头格式与对应于MAC RAR的MAC子头格式相同，不同在于该MAC子头中没有对应的MAC RAR。
也就是说，针对Msg1based SI request进行响应的MAC子头独立组成一个只包含MAC子头的MAC subPDU。
这里，所述第一MAC subPDU位于所述随机接入响应消息的MAC PDU的预定位置。
具体的，所述预定位置为排在全部的第二MAC subPDU之前的位置，或者为排在全部的第二MAC subPDU之后的位置，其中所述第二MAC subPDU中包括MAC子头和相对应的MAC RAR。
对于针对Msg1based SI request响应的MAC subPDU在MAC PDU中的具体位置示意，具体参见图9和图10，以及对包括针对Msg1based SI request响应的MAC subPDU的MAC PDU结构的详述，参见基站侧随机接入响应方法实施例的相关部分，这里不再赘述。
进一步的，本公开中，上述步骤201之后，上述方法还包括步骤202。
步骤202，对所述随机接入响应消息进行解析。
本公开的一些实施例的随机接入响应方法，通过终端接收基站发送的随机接入响应消息并解析该随机接入响应消息，其中，随机接入响应消息的媒体接入控制协议数据单元MAC PDU包括至少一个媒体接入控制子协议数据单元MAC subPDU，每个所述MAC subPDU包含一个MAC子头和可能的与该MAC子头相对应的媒体接入控制随机接入响应MAC RAR；当所述MAC subPDU为至少两个时，至少两个的所述MAC subPDU在MAC PDU中依次顺序排列，这样，UE不需要串行地解析每个MAC子头和对应的MAC RAR，使得UE能够快速地接收和解析出针对本终端发送的随机接入请求的响应，既降低随机接入时延，又实现终端省电。
作为一种可选的实现方式，上述步骤202包括子步骤202-1至202-3。
子步骤202-1，对所述随机接入响应消息的第一个MAC subPDU进行解析；
子步骤202-2，若第一个MAC subPDU的MAC子头中包括随机接入前导码序号RAPID，则该MAC subPDU为包含MAC RAR的MAC subPDU，依据预先设定的包含MAC RAR的MAC subPDU的字节长度，对整个的所述MAC PDU进行拆分，获得每一个包含MAC RAR的MAC subPDU；以及
子步骤202-3，对每一MAC subPDU进行并行解析。
需说明的是，上述步骤202-1～202-3中对应的随机接入响应MAC PDU中只有包含MAC RAR的MAC subPDU。是一种最简单MAC PDU结构。其MAC PDU结构和终端解析处理顺序如图12所示。
基于该MAC PDU结构，为了更清楚的说明随机接入的处理过程，下面从基站侧和终端侧两方面进行阐述。
1)基站侧：
步骤1，基站接收终端在相同时频资源上发送的随机接入请求Msg1，可能在相同时频资源上有不同终端发送不同的preamble码；
步骤2，基站对在相同时频资源上发送Msg1的终端组织随机接入响应Msg2，针对在相同时频资源发送不同的preamble码的终端，多个随机接入响应，即MAC RAR，可以组织在一个MAC PDU中。
这里，按照本公开的一些实施例中定义的MAC PDU格式组织。
步骤3：基站根据Msg2分配的上行资源接收Msg3并进行随机接入的后续操作。
2)终端侧：
步骤1，终端根据基站配置随机接入资源，选择PRACH和preamble发起随机接入；
步骤2，终端解析第一个MAC subPDU的MAC子头，确定其包含MAC RAR；
步骤3，终端将MAC PDU拆分成整数个MAC subPDU，每个MAC subPDU包括一个MAC子头和一个MAC RAR，并对这些MAC subPDU并行解析，一旦获取针对该终端的MAC subPDU，即解析出其中一个MAC subPDU的MAC子头中包含的RAPID与该终端发送Msg1的随机接入preamble ID一致，则丢弃其他MAC subPDU；
步骤4，终端根据接收到的MAC RAR，进行发送Msg3及后续操作。
进一步的，本公开的一些实施例中，上述子步骤202-3之后，还包括子步骤202-4。
子步骤202-4，当解析其中一个包含MAC RAR的MAC subPDU时，所述其中一个MAC subPDU中的MAC子头所包含的RAPID与所述终端发送随机接入请求Msg1时的随机接入前导码序号preamble ID一致时，则丢弃其他包含MAC RAR的MAC subPDU。
这里，由于本公开的一些实施例的MAC PDU的结构特点，包含MAC RAR的MAC subPDU之间是各自相互独立的个体，且采用并行解析的方式，可以快速的解析到与当前终端发送随机接入请求Msg1时的随机接入前导码序号preamble ID一致的包含MAC RAR的MAC subPDU，既降低随机接入时延，又实现终端省电的目的。
作为另一种可选的实现方式，步骤202-1之后，还包括子步骤202-5和202-6。
子步骤202-5，若第一个MAC subPDU为包括回退指示BI的MAC子头，且所述终端发起随机接入的小区未开启基于Msg1的系统消息请求功能，则依据预先设定的包含MAC RAR的MAC subPDU的字节长度，对整个的所述 MAC PDU中，除第一个MAC subPDU外的剩余部分进行拆分，获得每一个包含MAC RAR的MAC subPDU；
子步骤202-6，对每一MAC subPDU进行并行解析。
需说明的是，上述步骤202-5～202-6中对应的随机接入响应MAC PDU中有包含BI的MAC subPDU和包含MAC RAR的MAC subPDU。其MAC PDU结构和终端解析处理顺序如图13所示。
基于该MAC PDU结构，为了更清楚的说明随机接入的处理过程，下面从基站侧和终端侧两方面进行阐述。
1)基站侧：
步骤1，基站接收终端在相同时频资源上发送的随机接入请求Msg1，可能在相同时频资源上有不同终端发送不同的preamble码；
步骤2，基站对在相同时频资源上发送Msg1的终端组织随机接入响应Msg2，针对在相同时频资源发送不同的preamble码的终端，多个随机接入响应，即MAC RAR，可以组织在一个MAC PDU中，同时基站可能发送BI指示进行随机接入拥塞控制；
步骤3，基站根据Msg2分配的上行资源接收Msg3并进行随机接入的后续操作。
2)终端侧：
步骤1，终端根据基站配置随机接入资源，选择PRACH和preamble发起随机接入；
步骤2，终端解析第一个MAC subPDU的MAC子头，确定其包含BI指示；
步骤3，终端将除第一个MAC subPDU的MAC PDU剩余部分拆分成整数个MAC subPDU，每个MAC subPDU包括一个MAC子头和一个MAC RAR，并对这些MAC subPDU并行解析，若获取针对该终端的MAC subPDU，即解析出其中一个MAC subPDU的MAC子头中包含的RAPID与该终端发送Msg1的随机接入preamble ID一致，则丢弃其他MAC subPDU；
步骤4：终端根据接收到的MAC RAR，进行发送Msg3及后续操作。
进一步的，子步骤202-6之后，执行步骤202-4，具体参见步骤202-4部 分的阐述，这里不再赘述。
作为又一种可选的实现方式，子步骤202-1之后，还包括：
子步骤202-7，若第一个MAC subPDU为包括回退指示BI的MAC子头，且所述终端发起随机接入的小区已开启基于Msg1的系统消息请求功能，且预先约定针对基于Msg1的系统消息请求进行响应的MAC subPDU位于全部的第二MAC subPDU之前时，则进一步对所述随机接入响应消息的第二个MAC subPDU进行解析；
子步骤202-8，若确定第二个MAC subPDU包括针对基于Msg1的系统消息请求进行响应的MAC子头时，则进一步对所述随机接入响应消息的第三个MAC subPDU进行解析；
子步骤202-9，若第三个MAC subPDU中包括MAC RAR时，则依据预先设定的包含MAC RAR的MAC subPDU的字节长度，对整个的所述MAC PDU中，除第一个MAC subPDU和第二个MAC subPDU外的剩余部分进行拆分，获得每一个包含MAC RAR的MAC subPDU；
子步骤202-10，对每一MAC subPDU进行并行解析。
进一步的，子步骤202-10之后，执行步骤202-4，具体参见步骤202-4部分的阐述，这里不再赘述。
需说明的是，上述步骤202-7～202-10中对应的随机接入响应MAC PDU中有包含BI的MAC subPDU、包含MAC RAR的MAC subPDU和针对Msg1based SI request响应的MAC subPDU，且针对Msg1based SI request响应的MAC subPDU放置在其他MAC subPDU之前。其MAC PDU结构和终端解析处理顺序如图14所示。
基于如图14所示的MAC PDU结构，为了更清楚的说明随机接入的处理过程，下面从基站侧和终端侧两方面进行阐述。
1)基站侧：
步骤1，基站接收终端在相同时频资源上发送的随机接入请求Msg1，可能在相同时频资源上有不同终端发送不同的preamble码；
步骤2，基站对在相同时频资源上发送Msg1的终端组织随机接入响应Msg2，针对在相同时频资源发送不同的preamble码的终端，多个随机接入响 应，即MAC RAR，可以组织在一个MAC PDU中，同时基站可能发送BI指示进行随机接入拥塞控制，若接收到基站为Msg1based SI request预留的preamble，对Msg1based SI request进行响应；
步骤3，基站根据Msg2分配的上行资源接收Msg3并进行随机接入的后续操作。
2)终端侧：
分支一：如果Msg1based SI request的随机接入过程可以和其他随机接入过程并行进行，则具体步骤如下：
步骤1，终端根据基站配置随机接入资源，选择PRACH和preamble发起随机接入，其中如果终端发起Msg1based SI request过程，则使用基站为该系统消息请求预留的preamble和/或PRACH资源；
步骤2，终端解析第一个MAC subPDU的MAC子头，确定其包含BI；
步骤3，终端解析第二个MAC subPDU的MAC子头，确定其包含针对Msg1based SI request的响应；
如果终端只发送了Msg1based SI request的随机接入请求，收到响应后随机接入过程结束；如果终端还发送了其他的随机接入请求，则进入步骤4；
步骤4，终端解析后续MAC subPDU的MAC子头，确定其包含MAC RAR；
步骤5，终端将剩余MAC PDU拆分成整数个MAC subPDU，每个MAC subPDU包括一个MAC子头和一个MAC RAR，并对这些MAC subPDU并行解析，一旦获取针对该终端的MAC subPDU，即解析出其中一个MAC subPDU的MAC子头中包含的RAPID与该终端发送Msg1的preamble ID一致，则丢弃其他MAC subPDU；
步骤6：终端根据接收到的MAC RAR，进行发送Msg3及后续操作。
分支二：如果Msg1based SI request的随机接入过程不可以和其他随机接入过程并行进行，则具体步骤如下：
步骤1，终端根据基站配置随机接入资源，选择PRACH和preamble发起随机接入，其中如果终端发起Msg1based SI request过程，则使用基站为该系统消息请求预留的preamble和/或PRACH资源；
步骤2，终端解析第一个MAC subPDU的MAC子头，确定其包含BI；
步骤3，终端解析第二个MAC subPDU的MAC子头，确定其包含针对Msg1based SI request的响应；
这里，如果终端发送了Msg1based SI request的随机接入请求，收到响应后随机接入过程结束；如果终端发送了其他目的的随机接入过程，则进入步骤4；
步骤4，终端解析后续MAC subPDU的MAC子头，确定其包含MAC RAR；
步骤5，终端将剩余MAC PDU拆分成整数个MAC subPDU，每个MAC subPDU包括一个MAC子头和一个MAC RAR，并对这些MAC subPDU并行解析，若获取针对该终端的MAC subPDU，即解析出其中一个MAC subPDU的MAC子头中包含的RAPID与该终端发送Msg1的preamble ID一致，则丢弃其他MAC subPDU；
步骤6：终端根据接收到的MAC RAR，进行发送Msg3及后续操作。
作为再一种可选的实现方式，子步骤202-1之后，还包括：
子步骤202-11，若第一个MAC subPDU中为包括回退指示BI的MAC子头，且所述终端发起随机接入的小区已开启基于Msg1的系统消息请求功能，且预先约定针对基于Msg1的系统消息请求进行响应的MAC subPDU位于全部的第二MAC subPDU之后时，则依据预先设定的包含MAC RAR的MAC subPDU的字节长度，对整个的所述MAC PDU中，除第一个MAC subPDU外的剩余部分进行拆分，获得每一个包含MAC RAR的MAC subPDU，以及可能的小于包含MAC RAR的MAC subPDU的字节长度的剩余部分，该剩余部分可能包含针对Msg1的系统消息请求进行响应的MAC subPDU。
进一步的，在子步骤202-11之后，还包括：
子步骤202-12，分别对包括MAC RAR的每一个MAC subPDU进行并行解析以及对可能包括针对基于Msg1的系统消息请求进行响应的MAC subPDU进行解析。
这里，在子步骤202-12之后，还包括：
子步骤202-13，若终端同时发送了基于Msg1的系统消息请求和另一个随机接入请求，终端若在包含MAC RAR的MAC subPDU中解析出其中一个MAC subPDU的MAC子头中所包含的RAPID与所述终端发送随机接入请求 Msg1时的随机接入前导码序号preamble ID一致时，则丢弃其他包含MAC RAR的MAC subPDU；
子步骤202-14，若终端只发送了基于Msg1的系统消息请求，则终端丢弃所有包含MAC RAR的MAC subPDU，只解析剩余部分，获取针对基于Msg1的系统消息请求进行的响应；
子步骤202-15，若终端只发送了非基于Msg1的系统消息请求的随机接入请求，则终端丢弃可能包含针对基于Msg1的系统消息请求进行响应的MAC subPDU的剩余部分，并行解析包含MAC RAR的MAC subPDU，若解析出其中一个MAC subPDU的MAC子头中所包含的RAPID与所述终端发送随机接入请求Msg1时的随机接入前导码序号preamble ID一致时，则丢弃其他全部MAC subPDU。
需说明的是，上述子步骤201-12～201-15中对应的随机接入响应MAC PDU中有包含BI的MAC subPDU、包含MAC RAR的MAC subPDU和针对Msg1based SI request响应的MAC subPDU，且针对Msg1based SI request响应的MAC subPDU放置在其他MAC subPDU之后。其MAC PDU结构和终端解析处理顺序如图15所示。
基于如图15所示的MAC PDU结构，为了更清楚的说明随机接入的处理过程，下面从基站侧和终端侧两方面进行阐述。
1)基站侧：
步骤1，基站接收终端在相同时频资源上发送的随机接入请求Msg1，可能在相同时频资源上有不同终端发送不同的preamble码；
步骤2，基站对在相同时频资源上发送Msg1的终端组织随机接入响应Msg2，针对在相同时频资源发送不同的preamble码的终端，多个随机接入响应，即MAC RAR，可以组织在一个MAC PDU中，同时基站可能发送BI指示进行随机接入拥塞控制，若接收到基站为Msg1based SI request预留的preamble，对Msg1based SI request进行响应；
步骤3，基站根据Msg2分配的上行资源接收Msg3并进行随机接入的后续操作。
2)终端侧：
分支一：如果Msg1based SI request的随机接入过程可以和其他随机接入过程并行进行，则具体步骤如下，
步骤1，终端根据基站配置随机接入资源，选择PRACH和preamble发起随机接入，其中如果终端发起Msg1based SI request过程，则使用基站为该系统消息请求预留的preamble和/或PRACH资源；
步骤2，终端解析第一个MAC subPDU的MAC子头，确定其包含BI；
步骤3，终端将剩余MAC PDU拆分成整数个包含MAC RAR的MAC subPDU，对这些MAC subPDU并行解析，若获取针对该终端的MAC subPDU，即解析出其中一个MAC subPDU的MAC子头中包含的RAPID与该终端发送Msg1的preamble ID一致，则丢弃其他包含MAC RAR的MAC subPDU；同时，终端如果发送了Msg1based SI request，并行解析拆分后的剩余部分，获取针对Msg1based SI request的响应，该拆分后的剩余部分其大小小于一个包含MAC RAR的MAC subPDU的大小，
步骤4：终端根据接收到的MAC RAR，进行发送Msg3及后续操作。
分支二：如果Msg1based SI request的随机接入过程不可以和其他随机接入过程并行进行，则具体步骤如下：
步骤1，终端根据基站配置随机接入资源，选择PRACH和preamble发起随机接入，其中如果终端发起Msg1based SI request过程，则使用基站为该系统消息请求预留的preamble和/或PRACH资源；
步骤2，终端解析第一个MAC subPDU的MAC子头，确定其包含BI；
步骤3，若终端发送的随机接入请求为除Msg1based SI request的其他随机接入请求，则终端将剩余MAC PDU拆分成整数个包含MAC RAR的MAC subPDU，并对这些MAC subPDU并行解析，若获取针对该终端的MAC subPDU，即解析出其中一个MAC subPDU的MAC子头中包含的RAPID与该终端发送Msg1的preamble ID一致，则丢弃其他包含MAC RAR的MAC subPDU，同时丢弃拆分后的剩余部分；
若终端发送的随机接入请求为Msg1based SI request的随机接入请求，终端将剩余MAC PDU拆分出整数个包含MAC RAR的MAC subPDU并丢弃，终端只解析拆分后的剩余部分，获取针对Msg1based SI request的响应，该拆 分后的剩余部分其大小小于一个包含MAC RAR的MAC subPDU的大小。
步骤4，终端根据接收到的MAC RAR，进行发送Msg3及后续操作。
本公开的一些实施例的随机接入响应方法，通过终端接收基站发送的随机接入响应消息并解析该随机接入响应消息，其中，随机接入响应消息的媒体接入控制协议数据单元MAC PDU包括至少一个媒体接入控制子协议数据单元MAC subPDU，每个所述MAC subPDU包含一个MAC子头和可能的与该MAC子头相对应的媒体接入控制随机接入响应MAC RAR；当所述MAC subPDU为至少两个时，至少两个的所述MAC subPDU在MAC PDU中依次顺序排列，能够使得单个终端UE快速接收和解析出针对本终端发送的随机接入请求的响应，既降低随机接入时延，又实现终端省电。
如图16所示，本公开的一些实施例还提供了一种随机接入响应装置，包括：发送模块301，用于向终端发送随机接入响应消息，其中所述随机接入响应消息的媒体接入控制协议数据单元MAC PDU包括至少一个媒体接入控制子协议数据单元MAC subPDU，每个所述MAC subPDU包含一个MAC子头和可能的与该MAC子头相对应的媒体接入控制随机接入响应MAC RAR；当所述MAC subPDU为至少两个时，至少两个的所述MAC subPDU在MAC PDU中依次顺序排列。
本公开的一些实施例的随机接入响应装置，所述MAC subPDU包括第一MAC subPDU，所述第一MAC subPDU中仅包括第一MAC子头。
可选的，本公开的一些实施例的随机接入响应装置，所述第一MAC子头为包含回退指示BI的子头。
具体的，在所述随机接入响应消息中，所述第一MAC subPDU排在其他MAC subPDU之前。
可选的，本公开的一些实施例的随机接入响应装置，所述第一MAC子头为针对基于Msg1的系统消息请求进行响应的MAC子头。
具体的，所述第一MAC subPDU位于所述随机接入响应消息的MAC PDU的预定位置。
具体的，所述预定位置为排在全部的第二MAC subPDU之前的位置，或者为排在全部的第二MAC subPDU之后的位置，其中所述第二MAC subPDU 中包括MAC子头和相对应的MAC RAR。
本公开的一些实施例的随机接入响应装置，通过基站向终端发送随机接入响应消息，其中，随机接入响应消息的媒体接入控制协议数据单元MAC PDU包括至少一个媒体接入控制子协议数据单元MAC subPDU，每个所述MAC subPDU包含一个MAC子头和可能的与该MAC子头相对应的媒体接入控制随机接入响应MAC RAR；当所述MAC subPDU为至少两个时，至少两个的所述MAC subPDU在MAC PDU中依次顺序排列，能够使基站gNB快速响应来源于多个终端、多种需求的随机接入请求。
需要说明的是，该装置是与上述方法实施例对应的装置，上述方法实施例中所有实现方式均适用于该装置的实施例中，也能达到相同的技术效果。
如图17所示，本公开的一些实施例还提供了一种基站，包括存储器420、处理器400、收发机410、总线接口及存储在存储器420上并可在处理器400上运行的计算机程序，所述处理器400用于读取存储器420中的程序，执行下列过程：向终端发送随机接入响应消息，其中所述随机接入响应消息的媒体接入控制协议数据单元MAC PDU包括至少一个媒体接入控制子协议数据单元MAC subPDU，每个所述MAC subPDU包含一个MAC子头和可能的与该MAC子头相对应的媒体接入控制随机接入响应MAC RAR；当所述MAC subPDU为至少两个时，至少两个的所述MAC subPDU在MAC PDU中依次顺序排列。
其中，在图17中，总线架构可以包括任意数量的互联的总线和桥，具体由处理器400代表的一个或多个处理器和存储器420代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口。收发机410可以是多个元件，即包括发送机和收发机，提供用于在传输介质上与各种其他装置通信的单元。处理器400负责管理总线架构和通常的处理，存储器420可以存储处理器400在执行操作时所使用的数据。
可选的，所述MAC subPDU包括第一MAC subPDU，所述第一MAC subPDU中仅包括第一MAC子头。
可选的，所述第一MAC子头为包含回退指示BI的子头。
可选的，在所述随机接入响应消息中，所述第一MAC subPDU排在其他MAC subPDU之前。
可选的，所述第一MAC子头为针对基于Msg1的系统消息请求进行响应的MAC子头。
可选的，所述第一MAC subPDU位于所述随机接入响应消息的MAC PDU的预定位置。
可选的，所述预定位置为排在全部的第二MAC subPDU之前的位置，或者为排在全部的第二MAC subPDU之后的位置，其中所述第二MAC subPDU中包括MAC子头和相对应的MAC RAR。
该程序被处理器执行时能实现上述方法实施例中的所有实现方式，为避免重复，此处不再赘述。
如图18所示，本公开的一些实施例还提供了一种随机接入响应装置，包括：接收模块501，用于接收基站发送的随机接入响应消息，其中所述随机接入响应消息的媒体接入控制协议数据单元MAC PDU包括至少一个媒体接入控制子协议数据单元MAC subPDU，每个所述MAC subPDU包含一个MAC子头和可能的与该MAC子头相对应的媒体接入控制随机接入响应MAC RAR；当所述MAC subPDU为至少两个时，至少两个的所述MAC subPDU在MAC PDU中依次顺序排列。
本公开的一些实施例的随机接入响应装置，所述MAC subPDU包括第一MAC subPDU，所述第一MAC subPDU中仅包括第一MAC子头。
可选的，本公开的一些实施例的随机接入响应装置，所述第一MAC子头为包含回退指示BI的子头。
具体的，本公开的一些实施例的随机接入响应装置，在所述随机接入响应消息中，所述第一MAC subPDU排在其他MAC subPDU之前。
可选的，所述第一MAC子头为针对基于Msg1的系统消息请求进行响应的MAC子头。
具体的，本公开的一些实施例的随机接入响应装置，所述第一MAC subPDU位于所述随机接入响应消息的MAC PDU的预定位置。
具体的，所述预定位置为排在全部的第二MAC subPDU之前的位置，或者为排在全部的第二MAC subPDU之后的位置，其中所述第二MAC subPDU中包括MAC子头和相对应的MAC RAR。
本公开的一些实施例的随机接入响应装置，随机接入响应装置包括：解析模块502，用于接收基站发送的随机接入响应消息之后，对所述随机接入响应消息进行解析。
本公开的一些实施例的随机接入响应装置，所述解析模块502包括：第一解析子模块502-1，用于对所述随机接入响应消息的第一个MAC subPDU进行解析；第一拆分子模块502-2，用于若第一个MAC subPDU的MAC子头中包括随机接入前导码序号RAPID，则该MAC subPDU为包含MAC RAR的MAC subPDU，依据预先设定的包含MAC RAR的MAC subPDU的字节长度，对整个的所述MAC PDU进行拆分，获得每一个包含MAC RAR的MAC subPDU；和第一并行解析子模块502-3，用于对每一MAC subPDU进行并行解析。
本公开的一些实施例的随机接入响应装置，所述解析模块502包括：第二拆分子模块502-4，用于在对所述随机接入响应消息的第一个MAC subPDU进行解析之后，若第一个MAC subPDU为包括回退指示BI的MAC子头，且所述终端发起随机接入的小区未开启基于Msg1的系统消息请求功能，则依据预先设定的包含MAC RAR的MAC subPDU的字节长度，对整个的所述MAC PDU中，除第一个MAC subPDU外的剩余部分进行拆分，获得每一个包含MAC RAR的MAC subPDU；第二并行解析子模块502-5，用于对每一MAC subPDU进行并行解析。
本公开的一些实施例的随机接入响应装置，所述解析模块502包括：第二解析子模块502-6，用于在对所述随机接入响应消息的第一个MAC subPDU进行解析之后，若第一个MAC subPDU为包括回退指示BI的MAC子头，且所述终端发起随机接入的小区已开启基于Msg1的系统消息请求功能，且预先约定针对基于Msg1的系统消息请求进行响应的MAC subPDU位于全部的第二MAC subPDU之前时，则进一步对所述随机接入响应消息的第二个MAC subPDU进行解析；第三解析子模块502-7，用于若确定第二个MAC  subPDU包括针对基于Msg1的系统消息请求进行响应的MAC子头时，则进一步对所述随机接入响应消息的第三个MAC subPDU进行解析；第三拆分子模块502-8，用于若第三个MAC subPDU中包括MAC RAR时，则依据预先设定的包含MAC RAR的MAC subPDU的字节长度，对整个的所述MAC PDU中，除第一个MAC subPDU和第二个MAC subPDU外的剩余部分进行拆分，获得每一个包含MAC RAR的MAC subPDU；第三并行解析子模块5029，用于对每一MAC subPDU进行并行解析。
本公开的一些实施例的随机接入响应装置，所述解析模块502包括：第一处理子模块502-10，用于在对每一MAC subPDU进行并行解析之后，当解析其中一个包含MAC RAR的MAC subPDU时，所述其中一个MAC subPDU中的MAC子头所包含的RAPID与所述终端发送随机接入请求Msg1时的随机接入前导码序号preamble ID一致时，则丢弃其他包含MAC RAR的MAC subPDU。
本公开的一些实施例的随机接入响应装置，所述解析模块502包括：第四拆分子模块502-11，用于在对所述随机接入响应消息的第一个MAC subPDU进行解析之后，若第一个MAC subPDU中为包括回退指示BI的MAC子头，且所述终端发起随机接入的小区已开启基于Msg1的系统消息请求功能，且预先约定针对基于Msg1的系统消息请求进行响应的MAC subPDU位于全部的第二MAC subPDU之后时，则依据预先设定的包含MAC RAR的MAC subPDU的字节长度，对整个的所述MAC PDU中，除第一个MAC subPDU外的剩余部分进行拆分，获得每一个包含MAC RAR的MAC subPDU，以及可能的小于包含MAC RAR的MAC subPDU的字节长度的剩余部分，该剩余部分可能包含针对Msg1的系统消息请求进行响应的MAC subPDU。
本公开的一些实施例的随机接入响应装置，所述解析模块502包括：第四解析子模块502-12，用于分别对包括MAC RAR的每一个MAC subPDU进行并行解析以及对可能包括针对基于Msg1的系统消息请求进行响应的MAC subPDU进行解析。
本公开的一些实施例的随机接入响应装置，所述解析模块502包括：第二处理子模块502-13，用于若终端同时发送了基于Msg1的系统消息请求 和另一个随机接入请求，终端若在包含MAC RAR的MAC subPDU中解析出其中一个MAC subPDU的MAC子头中所包含的RAPID与所述终端发送随机接入请求Msg1时的随机接入前导码序号preamble ID一致时，则丢弃其他包含MAC RAR的MAC subPDU；第三处理子模块502-14，用于若终端只发送了基于Msg1的系统消息请求，则终端丢弃所有包含MAC RAR的MAC subPDU，只解析剩余部分，获取针对基于Msg1的系统消息请求进行的响应；第四处理子模块502-15，用于若终端只发送了非基于Msg1的系统消息请求的随机接入请求，则终端丢弃可能包含针对基于Msg1的系统消息请求进行响应的MAC subPDU的剩余部分，并行解析包含MAC RAR的MAC subPDU，若解析出其中一个MAC subPDU的MAC子头中所包含的RAPID与所述终端发送随机接入请求Msg1时的随机接入前导码序号preamble ID一致时，则丢弃其他全部MAC subPDU。
本公开的一些实施例的随机接入响应装置，通过终端接收基站发送的随机接入响应消息并解析该随机接入响应消息，其中，随机接入响应消息的媒体接入控制协议数据单元MAC PDU包括至少一个媒体接入控制子协议数据单元MAC subPDU，每个所述MAC subPDU包含一个MAC子头和可能的与该MAC子头相对应的媒体接入控制随机接入响应MAC RAR；当所述MAC subPDU为至少两个时，至少两个的所述MAC subPDU在MAC PDU中依次顺序排列，能够使得单个终端UE快速接收和解析出针对本终端发送的随机接入请求的响应，既降低随机接入时延，又实现终端省电。
需要说明的是，该随机接入响应装置是与上述随机接入响应方法相对应的装置，其中上述方法实施例中所有实现方式均适用于该装置的实施例中，也能达到同样的技术效果。
在本公开的一些实施例中，参照图19所示，还提供了一种终端，包括存储器620、处理器600、收发机610、用户接口630、总线接口及存储在存储器620上并可在处理器600上运行的计算机程序，所述处理器600用于读取存储器620中的程序，执行下列过程：接收基站发送的随机接入响应消息，其中所述随机接入响应消息的媒体接入控制协议数据单元MAC PDU包括至少一个媒体接入控制子协议数据单元MAC subPDU，每个所述MAC subPDU 包含一个MAC子头和可能的与该MAC子头相对应的媒体接入控制随机接入响应MAC RAR；当所述MAC subPDU为至少两个时，至少两个的所述MAC subPDU在MAC PDU中依次顺序排列。
其中，在图19中，总线架构可以包括任意数量的互联的总线和桥，具体由处理器600代表的一个或多个处理器和存储器620代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口。收发机610可以是多个元件，即包括发送机和收发机，提供用于在传输介质上与各种其他装置通信的单元。针对不同的用户设备，用户接口630还可以是能够外接内接需要设备的接口，连接的设备包括但不限于小键盘、显示器、扬声器、麦克风、操纵杆等。
处理器600负责管理总线架构和通常的处理，存储器620可以存储处理器600在执行操作时所使用的数据。
可选的，所述MAC subPDU包括第一MAC subPDU，所述第一MAC subPDU中仅包括第一MAC子头。
可选的，所述第一MAC子头为包含回退指示BI的子头。
可选的，在所述随机接入响应消息中，所述第一MAC subPDU排在其他MAC subPDU之前。
可选的，所述第一MAC子头为针对基于Msg1的系统消息请求进行响应的MAC子头。
可选的，所述第一MAC subPDU位于所述随机接入响应消息的MAC PDU的预定位置。
可选的，所述预定位置为排在全部的第二MAC subPDU之前的位置，或者为排在全部的第二MAC subPDU之后的位置，其中所述第二MAC subPDU中包括MAC子头和相对应的MAC RAR。
处理器600还用于读取存储器620中的程序，执行如下步骤：对所述随机接入响应消息进行解析。
处理器600还用于读取存储器620中的程序，执行如下步骤：对所述随机接入响应消息的第一个MAC subPDU进行解析；若第一个MAC subPDU 的MAC子头中包括随机接入前导码序号RAPID，则该MAC subPDU为包含MAC RAR的MAC subPDU，依据预先设定的包含MAC RAR的MAC subPDU的字节长度，对整个的所述MAC PDU进行拆分，获得每一个包含MAC RAR的MAC subPDU；对每一MAC subPDU进行并行解析。
处理器600还用于读取存储器620中的程序，执行如下步骤：若第一个MAC subPDU为包括回退指示BI的MAC子头，且所述终端发起随机接入的小区未开启基于Msg1的系统消息请求功能，则依据预先设定的包含MAC RAR的MAC subPDU的字节长度，对整个的所述MAC PDU中，除第一个MAC subPDU外的剩余部分进行拆分，获得每一个包含MAC RAR的MAC subPDU；对每一MAC subPDU进行并行解析。
处理器600还用于读取存储器620中的程序，执行如下步骤：若第一个MAC subPDU为包括回退指示BI的MAC子头，且所述终端发起随机接入的小区已开启基于Msg1的系统消息请求功能，且预先约定针对基于Msg1的系统消息请求进行响应的MAC subPDU位于全部的第二MAC subPDU之前时，则进一步对所述随机接入响应消息的第二个MAC subPDU进行解析；若确定第二个MAC subPDU包括针对基于Msg1的系统消息请求进行响应的MAC子头时，则进一步对所述随机接入响应消息的第三个MAC subPDU进行解析；若第三个MAC subPDU中包括MAC RAR时，则依据预先设定的包含MAC RAR的MAC subPDU的字节长度，对整个的所述MAC PDU中，除第一个MAC subPDU和第二个MAC subPDU外的剩余部分进行拆分，获得每一个包含MAC RAR的MAC subPDU；对每一MAC subPDU进行并行解析。
处理器600还用于读取存储器620中的程序，执行如下步骤：当解析其中一个包含MAC RAR的MAC subPDU时，所述其中一个MAC subPDU中的MAC子头所包含的RAPID与所述终端发送随机接入请求Msg1时的随机接入前导码序号preamble ID一致时，则丢弃其他包含MAC RAR的MAC subPDU。
处理器600还用于读取存储器620中的程序，执行如下步骤：若第一个MAC subPDU中为包括回退指示BI的MAC子头，且所述终端发起随机接入的小区已开启基于Msg1的系统消息请求功能，且预先约定针对基于Msg1的 系统消息请求进行响应的MAC subPDU位于全部的第二MAC subPDU之后时，则依据预先设定的包含MAC RAR的MAC subPDU的字节长度，对整个的所述MAC PDU中，除第一个MAC subPDU外的剩余部分进行拆分，获得每一个包含MAC RAR的MAC subPDU，以及可能的小于包含MAC RAR的MAC subPDU的字节长度的剩余部分，该剩余部分可能包含针对Msg1的系统消息请求进行响应的MAC subPDU。
处理器600还用于读取存储器620中的程序，执行如下步骤：分别对包括MAC RAR的每一个MAC subPDU进行并行解析以及对可能包括针对基于Msg1的系统消息请求进行响应的MAC subPDU进行解析。
处理器600还用于读取存储器620中的程序，执行如下步骤：若终端同时发送了基于Msg1的系统消息请求和另一个随机接入请求，终端若在包含MAC RAR的MAC subPDU中解析出其中一个MAC subPDU的MAC子头中所包含的RAPID与所述终端发送随机接入请求Msg1时的随机接入前导码序号preamble ID一致时，则丢弃其他包含MAC RAR的MAC subPDU；若终端只发送了基于Msg1的系统消息请求，则终端丢弃所有包含MAC RAR的MAC subPDU，只解析剩余部分，获取针对基于Msg1的系统消息请求进行的响应；若终端只发送了非基于Msg1的系统消息请求的随机接入请求，则终端丢弃可能包含针对基于Msg1的系统消息请求进行响应的MAC subPDU的剩余部分，并行解析包含MAC RAR的MAC subPDU，若解析出其中一个MAC subPDU的MAC子头中所包含的RAPID与所述终端发送随机接入请求Msg1时的随机接入前导码序号preamble ID一致时，则丢弃其他全部MAC subPDU。
在本公开的一些实施例中，还提供了一种计算机可读存储介质，其上存储有计算机程序，该程序被处理器执行时实现以下步骤：接收基站发送的随机接入响应消息，其中所述随机接入响应消息的媒体接入控制协议数据单元MAC PDU包括至少一个媒体接入控制子协议数据单元MAC subPDU，每个所述MAC subPDU包含一个MAC子头和可能的与该MAC子头相对应的媒体接入控制随机接入响应MAC RAR；当所述MAC subPDU为至少两个时，至少两个的所述MAC subPDU在MAC PDU中依次顺序排列。
该程序被处理器执行时能实现上述方法实施例中的所有实现方式，为避免重复，此处不再赘述。
在本公开的各种实施例中，计算机可读存储介质可以是易失性的存储介质或非易失性的存储介质。应理解，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本公开的一些实施例的实施过程构成任何限定。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的模块、子模块、单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本公开的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
以上所述是本公开的可选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本公开所述原理的前提下，还可以作出若干改进和润饰，这些改进和润饰也应视为本公开的保护范围。

Claims (48)

  1. 一种随机接入响应方法，该方法应用于基站，并且包括：
    向终端发送随机接入响应消息，其中所述随机接入响应消息的媒体接入控制协议数据单元MAC PDU包括至少一个媒体接入控制子协议数据单元MAC subPDU，每个所述MAC subPDU包含一个MAC子头和可能的与该MAC子头相对应的媒体接入控制随机接入响应MAC RAR；
    当所述MAC subPDU为至少两个时，至少两个的所述MAC subPDU在MAC PDU中依次顺序排列。
  2. 根据权利要求1所述的随机接入响应方法，其中，所述MAC subPDU包括第一MAC subPDU，所述第一MAC subPDU中仅包括第一MAC子头。
  3. 根据权利要求2所述的随机接入响应方法，其中，所述第一MAC子头为包含回退指示BI的子头。
  4. 根据权利要求3所述的随机接入响应方法，其中，在所述随机接入响应消息中，所述第一MAC subPDU排在其他MAC subPDU之前。
  5. 根据权利要求2所述的随机接入响应方法，其中，所述第一MAC子头为针对基于Msg1的系统消息请求进行响应的MAC子头。
  6. 根据权利要求5所述的随机接入响应方法，其中，所述第一MAC subPDU位于所述随机接入响应消息的MAC PDU的预定位置。
  7. 根据权利要求6所述的随机接入响应方法，其中，所述预定位置为排在全部的第二MAC subPDU之前的位置，或者为排在全部的第二MAC subPDU之后的位置，其中所述第二MAC subPDU中包括MAC子头和相对应的MAC RAR。
  8. 一种随机接入响应方法，该方法应用于终端，并且包括：
    接收基站发送的随机接入响应消息，其中所述随机接入响应消息的媒体接入控制协议数据单元MAC PDU包括至少一个媒体接入控制子协议数据单元MAC subPDU，每个所述MAC subPDU包含一个MAC子头和可能的与该MAC子头相对应的媒体接入控制随机接入响应MAC RAR；
    当所述MAC subPDU为至少两个时，至少两个的所述MAC subPDU在 MAC PDU中依次顺序排列。
  9. 根据权利要求8所述的随机接入响应方法，其中，所述MAC subPDU包括第一MAC subPDU，所述第一MAC subPDU中仅包括第一MAC子头。
  10. 根据权利要求9所述的随机接入响应方法，其中，所述第一MAC子头为包含回退指示BI的子头。
  11. 根据权利要求10所述的随机接入响应方法，其中，在所述随机接入响应消息中，所述第一MAC subPDU排在其他MAC subPDU之前。
  12. 根据权利要求9所述的随机接入响应方法，其中，所述第一MAC子头为针对基于Msg1的系统消息请求进行响应的MAC子头。
  13. 根据权利要求12所述的随机接入响应方法，其中，所述第一MAC subPDU位于所述随机接入响应消息的MAC PDU的预定位置。
  14. 根据权利要求13所述的随机接入响应方法，其中，所述预定位置为排在全部的第二MAC subPDU之前的位置，或者为排在全部的第二MAC subPDU之后的位置，其中所述第二MAC subPDU中包括MAC子头和相对应的MAC RAR。
  15. 根据权利要求9～14中任一项所述的随机接入响应方法，其中，接收基站发送的随机接入响应消息的步骤之后，所述方法还包括：
    对所述随机接入响应消息进行解析。
  16. 根据权利要求15所述的随机接入响应方法，其中，对所述随机接入响应消息进行解析的步骤，包括：
    对所述随机接入响应消息的第一个MAC subPDU进行解析；
    若第一个MAC subPDU的MAC子头中包括随机接入前导码序号RAPID，则该MAC subPDU为包含MAC RAR的MAC subPDU，依据预先设定的包含MAC RAR的MAC subPDU的字节长度，对整个的所述MAC PDU进行拆分，获得每一个包含MAC RAR的MAC subPDU；
    对每一MAC subPDU进行并行解析。
  17. 根据权利要求16所述的随机接入响应方法，其中，所述对所述随机接入响应消息的第一个MAC subPDU进行解析的步骤之后，所述方法还包括：
    若第一个MAC subPDU为包括回退指示BI的MAC子头，且所述终端发 起随机接入的小区未开启基于Msg1的系统消息请求功能，则依据预先设定的包含MAC RAR的MAC subPDU的字节长度，对整个的所述MAC PDU中，除第一个MAC subPDU外的剩余部分进行拆分，获得每一个包含MAC RAR的MAC subPDU；
    对每一MAC subPDU进行并行解析。
  18. 根据权利要求16所述随机接入响应方法，其中，所述对所述随机接入响应消息的第一个MAC subPDU进行解析的步骤之后，所述方法还包括：
    若第一个MAC subPDU为包括回退指示BI的MAC子头，且所述终端发起随机接入的小区已开启基于Msg1的系统消息请求功能，且预先约定针对基于Msg1的系统消息请求进行响应的MAC subPDU位于全部的第二MAC subPDU之前时，则进一步对所述随机接入响应消息的第二个MAC subPDU进行解析；
    若确定第二个MAC subPDU包括针对基于Msg1的系统消息请求进行响应的MAC子头时，则进一步对所述随机接入响应消息的第三个MAC subPDU进行解析；
    若第三个MAC subPDU中包括MAC RAR时，则依据预先设定的包含MAC RAR的MAC subPDU的字节长度，对整个的所述MAC PDU中，除第一个MAC subPDU和第二个MAC subPDU外的剩余部分进行拆分，获得每一个包含MAC RAR的MAC subPDU；
    对每一MAC subPDU进行并行解析。
  19. 根据权利要求16所述的随机接入响应方法，其中，所述对每一MAC subPDU进行并行解析的步骤之后，所述方法还包括：
    当解析其中一个包含MAC RAR的MAC subPDU时，所述其中一个MAC subPDU中的MAC子头所包含的RAPID与所述终端发送随机接入请求Msg1时的随机接入前导码序号preamble ID一致时，则丢弃其他包含MAC RAR的MAC subPDU。
  20. 根据权利要求16所述的随机接入响应方法，其中，所述对所述随机接入响应消息的第一个MAC subPDU进行解析的步骤之后，所述方法还包括：
    若第一个MAC subPDU中为包括回退指示BI的MAC子头，且所述终端 发起随机接入的小区已开启基于Msg1的系统消息请求功能，且预先约定针对基于Msg1的系统消息请求进行响应的MAC subPDU位于全部的第二MAC subPDU之后时，则依据预先设定的包含MAC RAR的MAC subPDU的字节长度，对整个的所述MAC PDU中，除第一个MAC subPDU外的剩余部分进行拆分，获得每一个包含MAC RAR的MAC subPDU，以及可能的小于包含MAC RAR的MAC subPDU的字节长度的剩余部分，该剩余部分可能包含针对Msg1的系统消息请求进行响应的MAC subPDU。
  21. 根据权利要求20所述的随机接入响应方法，其中，所述获得每一个包含MAC RAR的MAC subPDU的步骤之后，所述方法还包括：
    分别对包括MAC RAR的每一个MAC subPDU进行并行解析以及对可能包括针对基于Msg1的系统消息请求进行响应的MAC subPDU进行解析。
  22. 根据权利要求21所述的随机接入响应方法，还包括：
    若终端同时发送了基于Msg1的系统消息请求和另一个随机接入请求，终端若在包含MAC RAR的MAC subPDU中解析出其中一个MAC subPDU的MAC子头中所包含的RAPID与所述终端发送随机接入请求Msg1时的随机接入前导码序号preamble ID一致时，则丢弃其他包含MAC RAR的MAC subPDU；
    若终端只发送了基于Msg1的系统消息请求，则终端丢弃所有包含MAC RAR的MAC subPDU，只解析剩余部分，获取针对基于Msg1的系统消息请求进行的响应；
    若终端只发送了非基于Msg1的系统消息请求的随机接入请求，则终端丢弃可能包含针对基于Msg1的系统消息请求进行响应的MAC subPDU的剩余部分，并行解析包含MAC RAR的MAC subPDU，若解析出其中一个MAC subPDU的MAC子头中所包含的RAPID与所述终端发送随机接入请求Msg1时的随机接入前导码序号preamble ID一致时，则丢弃其他全部MAC subPDU。
  23. 一种随机接入响应装置，所述装置应用于基站，并且包括：
    发送模块，用于向终端发送随机接入响应消息，其中所述随机接入响应消息的媒体接入控制协议数据单元MAC PDU包括至少一个媒体接入控制子协议数据单元MAC subPDU，每个所述MAC subPDU包含一个MAC子头和 可能的与该MAC子头相对应的媒体接入控制随机接入响应MAC RAR；
    当所述MAC subPDU为至少两个时，至少两个的所述MAC subPDU在MAC PDU中依次顺序排列。
  24. 根据权利要求23所述的随机接入响应装置，其中，所述MAC subPDU包括第一MAC subPDU，所述第一MAC subPDU中仅包括第一MAC子头。
  25. 根据权利要求24所述的随机接入响应装置，其中，所述第一MAC子头为包含回退指示BI的子头。
  26. 根据权利要求25所述的随机接入响应装置，其中，在所述随机接入响应消息中，所述第一MAC subPDU排在其他MAC subPDU之前。
  27. 根据权利要求24所述的随机接入响应装置，其中，所述第一MAC子头为针对基于Msg1的系统消息请求进行响应的MAC子头。
  28. 根据权利要求27所述的随机接入响应装置，其中，所述第一MAC subPDU位于所述随机接入响应消息的MAC PDU的预定位置。
  29. 根据权利要求28所述的随机接入响应装置，其中，所述预定位置为排在全部的第二MAC subPDU之前的位置，或者为排在全部的第二MAC subPDU之后的位置，其中所述第二MAC subPDU中包括MAC子头和相对应的MAC RAR。
  30. 一种基站，包括：
    存储器、处理器及存储在存储器上并可在处理器上运行的计算机程序，其中，所述处理器执行所述计算机程序时实现根据权利要求1-7中任一项所述的方法。
  31. 一种计算机可读存储介质，其上存储有计算机程序，其中，该计算机程序被处理器执行时实现根据权利要求1-7中任一项所述的方法。
  32. 一种随机接入响应装置，所述装置应用于终端，并且包括：
    接收模块，用于接收基站发送的随机接入响应消息，其中所述随机接入响应消息的媒体接入控制协议数据单元MAC PDU包括至少一个媒体接入控制子协议数据单元MAC subPDU，每个所述MAC subPDU包含一个MAC子头和可能的与该MAC子头相对应的媒体接入控制随机接入响应MAC RAR；
    当所述MAC subPDU为至少两个时，至少两个的所述MAC subPDU在 MAC PDU中依次顺序排列。
  33. 根据权利要求32所述的随机接入响应装置，其中，所述MAC subPDU包括第一MAC subPDU，所述第一MAC subPDU中仅包括第一MAC子头。
  34. 根据权利要求33所述的随机接入响应装置，其中，所述第一MAC子头为包含回退指示BI的子头。
  35. 根据权利要求34所述的随机接入响应装置，其中，在所述随机接入响应消息中，所述第一MAC subPDU排在其他MAC subPDU之前。
  36. 根据权利要求33所述的随机接入响应装置，其中，所述第一MAC子头为针对基于Msg1的系统消息请求进行响应的MAC子头。
  37. 根据权利要求36所述的随机接入响应装置，其中，所述第一MAC subPDU位于所述随机接入响应消息的MAC PDU的预定位置。
  38. 根据权利要求37所述的随机接入响应装置，其中，所述预定位置为排在全部的第二MAC subPDU之前的位置，或者为排在全部的第二MAC subPDU之后的位置，其中所述第二MAC subPDU中包括MAC子头和相对应的MAC RAR。
  39. 根据权利要求33～38中任一项所述的随机接入响应装置，还包括：
    解析模块，用于接收基站发送的随机接入响应消息之后，对所述随机接入响应消息进行解析。
  40. 根据权利要求39所述的随机接入响应装置，其中，所述解析模块包括：
    第一解析子模块，用于对所述随机接入响应消息的第一个MAC subPDU进行解析；
    第一拆分子模块，用于若第一个MAC subPDU的MAC子头中包括随机接入前导码序号RAPID，则该MAC subPDU为包含MAC RAR的MAC subPDU，依据预先设定的包含MAC RAR的MAC subPDU的字节长度，对整个的所述MAC PDU进行拆分，获得每一个包含MAC RAR的MAC subPDU；
    第一并行解析子模块，用于对每一MAC subPDU进行并行解析。
  41. 根据权利要求40所述的随机接入响应装置，其中，所述解析模块还包括：
    第二拆分子模块，用于在对所述随机接入响应消息的第一个MAC subPDU进行解析之后，若第一个MAC subPDU为包括回退指示BI的MAC子头，且所述终端发起随机接入的小区未开启基于Msg1的系统消息请求功能，则依据预先设定的包含MAC RAR的MAC subPDU的字节长度，对整个的所述MAC PDU中，除第一个MAC subPDU外的剩余部分进行拆分，获得每一个包含MAC RAR的MAC subPDU；
    第二并行解析子模块，用于对每一MAC subPDU进行并行解析。
  42. 根据权利要求40所述的随机接入响应装置，其中，所述解析模块还包括：
    第二解析子模块，用于在对所述随机接入响应消息的第一个MAC subPDU进行解析之后，若第一个MAC subPDU为包括回退指示BI的MAC子头，且所述终端发起随机接入的小区已开启基于Msg1的系统消息请求功能，且预先约定针对基于Msg1的系统消息请求进行响应的MAC subPDU位于全部的第二MAC subPDU之前时，则进一步对所述随机接入响应消息的第二个MAC subPDU进行解析；
    第三解析子模块，用于若确定第二个MAC subPDU包括针对基于Msg1的系统消息请求进行响应的MAC子头时，则进一步对所述随机接入响应消息的第三个MAC subPDU进行解析；
    第三拆分子模块，用于若第三个MAC subPDU中包括MAC RAR时，则依据预先设定的包含MAC RAR的MAC subPDU的字节长度，对整个的所述MAC PDU中，除第一个MAC subPDU和第二个MAC subPDU外的剩余部分进行拆分，获得每一个包含MAC RAR的MAC subPDU；
    第三并行解析子模块，用于对每一MAC subPDU进行并行解析。
  43. 根据权利要求40所述的随机接入响应装置，其中，所述解析模块还包括：
    第一处理子模块，用于在对每一MAC subPDU进行并行解析之后，当解析其中一个包含MAC RAR的MAC subPDU时，所述其中一个MAC subPDU中的MAC子头所包含的RAPID与所述终端发送随机接入请求Msg1时的随机接入前导码序号preamble ID一致时，则丢弃其他包含MAC RAR的MAC  subPDU。
  44. 根据权利要求40所述的随机接入响应装置，其中，所述解析模块还包括：
    第四拆分子模块，用于在对所述随机接入响应消息的第一个MAC subPDU进行解析之后，若第一个MAC subPDU中为包括回退指示BI的MAC子头，且所述终端发起随机接入的小区已开启基于Msg1的系统消息请求功能，且预先约定针对基于Msg1的系统消息请求进行响应的MAC subPDU位于全部的第二MAC subPDU之后时，则依据预先设定的包含MAC RAR的MAC subPDU的字节长度，对整个的所述MAC PDU中，除第一个MAC subPDU外的剩余部分进行拆分，获得每一个包含MAC RAR的MAC subPDU，以及可能的小于包含MAC RAR的MAC subPDU的字节长度的剩余部分，该剩余部分可能包含针对Msg1的系统消息请求进行响应的MAC subPDU。
  45. 根据权利要求44所述的随机接入响应装置，其中，所述解析模块还包括：
    第四解析子模块，用于分别对包括MAC RAR的每一个MAC subPDU进行并行解析以及对可能包括针对基于Msg1的系统消息请求进行响应的MAC subPDU进行解析。
  46. 根据权利要求45所述的随机接入响应装置，其中，所述解析模块还包括：
    第二处理子模块，用于若终端同时发送了基于Msg1的系统消息请求和另一个随机接入请求，终端若在包含MAC RAR的MAC subPDU中解析出其中一个MAC subPDU的MAC子头中所包含的RAPID与所述终端发送随机接入请求Msg1时的随机接入前导码序号preamble ID一致时，则丢弃其他包含MAC RAR的MAC subPDU；
    第三处理子模块，用于若终端只发送了基于Msg1的系统消息请求，则终端丢弃所有包含MAC RAR的MAC subPDU，只解析剩余部分，获取针对基于Msg1的系统消息请求进行的响应；
    第四处理子模块，用于若终端只发送了非基于Msg1的系统消息请求的随机接入请求，则终端丢弃可能包含针对基于Msg1的系统消息请求进行响 应的MAC subPDU的剩余部分，并行解析包含MAC RAR的MAC subPDU，若解析出其中一个MAC subPDU的MAC子头中所包含的RAPID与所述终端发送随机接入请求Msg1时的随机接入前导码序号preamble ID一致时，则丢弃其他全部MAC subPDU。
  47. 一种终端，包括：
    存储器、处理器及存储在存储器上并可在处理器上运行的计算机程序，其中，所述处理器执行所述计算机程序时实现根据权利要求8-22中任一项所述的方法的步骤。
  48. 一种计算机可读存储介质，其上存储有计算机程序，其中，该计算机程序被处理器执行时实现根据权利要求8-22中任一项所述的方法的步骤。
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