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WO2010124440A1 - 一种随机接入竞争解决的判断方法、装置和系统 - Google Patents

一种随机接入竞争解决的判断方法、装置和系统 Download PDF

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Publication number
WO2010124440A1
WO2010124440A1 PCT/CN2009/071496 CN2009071496W WO2010124440A1 WO 2010124440 A1 WO2010124440 A1 WO 2010124440A1 CN 2009071496 W CN2009071496 W CN 2009071496W WO 2010124440 A1 WO2010124440 A1 WO 2010124440A1
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WO
WIPO (PCT)
Prior art keywords
rnti
contention resolution
network side
user equipment
request message
Prior art date
Application number
PCT/CN2009/071496
Other languages
English (en)
French (fr)
Inventor
权威
姜怡
张戬
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to MX2011011456A priority Critical patent/MX2011011456A/es
Priority to PCT/CN2009/071496 priority patent/WO2010124440A1/zh
Priority to CN200980100822.4A priority patent/CN102369773B/zh
Priority to BRPI0925334A priority patent/BRPI0925334A2/pt
Priority to EP09843852.6A priority patent/EP2427005B1/en
Priority to RU2011148146/07A priority patent/RU2516869C2/ru
Publication of WO2010124440A1 publication Critical patent/WO2010124440A1/zh
Priority to US13/283,288 priority patent/US8773987B2/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H04W74/0841—Random access procedures, e.g. with 4-step access with collision treatment
    • H04W74/085—Random access procedures, e.g. with 4-step access with collision treatment collision avoidance
    • 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
    • H04W28/04—Error control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H04W74/004—Transmission of channel access control information in the uplink, i.e. towards network
    • 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
    • H04W8/00—Network data management
    • H04W8/26—Network addressing or numbering for mobility support

Definitions

  • the present invention relates to the field of wireless communications, and in particular, to a method, apparatus, and system for determining a random access competition solution.
  • the UE In the LTE (Long Term Evolution) system, the UE (User Equipment) obtains uplink synchronization and uplink resources through a random access procedure. In the contention-based random access process, the UE randomly selects a RAP from a set of RAPs (Random Access Preamble) to initiate random access; and receives RAR (Random Access Response). After the response, the Msg3 (the third message of the random access) is sent, and the CCCH SDU (Common Control Channel Serving Data Unit) is carried in the Msg3 according to the reason for initiating the random access. UE's C-RNTI (Cell Radio Network Temporary Identifier).
  • RAPs Random Access Preamble
  • RAR Random Access Response
  • the Msg3 the third message of the random access
  • the CCCH SDU Common Control Channel Serving Data Unit
  • the UE After the Msg3 is sent, the UE starts a CRT (Contention Resolution Timer); if the CRT expires, if the contention resolution message is received, the competition is considered successful. If the CRT expires, there is no If the competition is successful, it will avoid a period of time and initiate random access again.
  • CRT Contention Resolution Timer
  • the UE receives the eNB (Evolved NodeB). After the UL Grant (uplink grant) of the new data transmission masked by the C-RNTI transmitted by the evolved base station, the contention resolution is considered successful; after the CRT timeout, if the UL Grant of the new data transmission is not received, If the competition is resolved, the UE will evade the time and initiate random access again.
  • MAC Media Access Control
  • eNB Evolved NodeB
  • the eNB receives a T C-RNTI (Temporary C-RNTI) temporarily allocated for the UE, the DL Assignment or the UL Grant, which is temporarily allocated by the UE after the Msg3 is sent, The UE does not process the information, which may result in the UE not being able to determine in time. Whether the competition has been resolved, it may lead to an extension of the time to initiate random access again.
  • T C-RNTI Temporal C-RNTI
  • the embodiment of the present invention provides a method, a device, and a system for determining a random access competition solution, which can solve the delay problem that may cause the random access of the UE in the contention-based random access process.
  • a method for judging random access competition including:
  • the contention resolution request message carries the cell radio network temporary identifier C-RNTI allocated by the UE or the service data unit CCCH of the common control channel
  • the network side message of the cell radio network temporary identifier T C-RNTI temporarily allocated by the network side for the UE is received before the timeout timer CRT expires, if the C-RNTI or the CCCH is used according to the C-RNTI or the CCCH.
  • the SDU and the signaling type of the network side message determine that the contention fails to be resolved, and then the backoff is performed.
  • a user equipment UE including:
  • a transceiver unit configured to send a contention resolution request message to the network side, where the contention resolution request message carries a cell radio network temporary identifier C-RNTI allocated by the UE or a service data unit CCCH SDU of the common control channel;
  • a first determining unit configured to: when the transceiver unit receives a network side message masked by a cell radio network temporary identifier T C-RNTI temporarily allocated by the network side to the UE, before the contention resolution timer CRT times out Determining whether the contention resolution fails according to the C-RNTI or the CCCH SDU and the signaling type of the network side message;
  • the backoff unit performs backoff when the result of the first determining unit determines that the contention resolution fails;
  • the contention resolution timer CRT is configured to record whether the elapsed time after the transmitting and receiving unit sends the contention resolution request message exceeds The default timeout wait time.
  • a network system including:
  • the user equipment UE is configured to send a contention resolution request message to the network device, where the contention resolution request message carries the cell radio network temporary identifier C-RNTI or the common control channel that the UE has allocated. a service data unit CCCH SDU; when the network side message of the cell radio network temporary identifier T C-RNTI temporarily allocated by the network device for the UE is received before the contention resolution timer CRT times out, if If the C-RNTI or the CCCH SDU and the signaling type of the network side message determine that the contention fails to be resolved, the backoff is performed;
  • a network device configured to receive a contention resolution request message sent by the UE, and send, to the user equipment, a network side message that is masked by the T C-RNTI.
  • Embodiments of the present invention provide a method, apparatus, and system for determining a random access contention solution, and after receiving a network side message masked with a T C-RNTI, combining the C-RNTI or CCCH SDU carried in the Msg3 and The type of the network side message masked by the T C-RNTI is used to determine whether the contention fails to be resolved. If the result of the judgment is a failure, the UE performs the backoff in time, thereby avoiding possible uplink transmission errors of the UE and avoiding possible other UEs. The uplink data transmission fails, and it is known whether the contention resolution fails before waiting for the timeout. Therefore, the time for re-initiating random access after the backoff can be shortened, and the random access is accelerated.
  • FIG. 1 is a flowchart of a method for determining a random access competition solution according to an embodiment of the present invention
  • Embodiment 1 of the present invention is a schematic diagram of Embodiment 1 of the present invention
  • Embodiment 2 of the present invention is a schematic diagram of Embodiment 2 of the present invention.
  • FIG. 5 is a flowchart of Embodiment 5 of the present invention
  • FIG. 6 is a schematic diagram of a UE according to an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of a network system according to an embodiment of the present invention.
  • UE1 in the Connected state and UE2 in the Idle state are triggered by the MAC and randomly selected at the same time and on the Physical Random Access Channel (PRACH) resource.
  • PRACH Physical Random Access Channel
  • the same RAP after UE1 and UE2 receive the RAR sent by the eNB, the RAR carries the T C-RNTL temporarily allocated for the UE, and both UE1 and UE2 consider that the RAR belongs to itself, and records the T C in the RAR message. -RNTI. Then, UE1 and UE2 will send their respective Msg3 messages, where the Msg3 message sent by UE1 contains its own C-RNTI, and the message sent by UE2 carries the CCCH SDU.
  • Msg3 message sent by UE1 contains its own C-RNTI
  • the message sent by UE2 carries the CCCH SDU.
  • the UE2 receives the contention resolution response message Msg4, which is the PDCCH (Physical Downlink Control Channel) that is temporarily masked by the eNB in the RAR for the UE 2 temporarily allocated T C-RNTI.
  • Msg4 Physical Downlink Control Channel
  • the command is notified that the T C-RNTI temporarily allocated by the eNB becomes the official C-RNTI of the UE 2 at this time.
  • the UE1 Before the CRT of the UE1 is timed out, the UE1 is still waiting for the contention resolution response message. If the eNB uses the C-RNTI of the UE2 to allocate the UL Grant to the UE2, the UE1 considers that the C-RNTI is the Tc- temporarily allocated by the eNB. The RNTI will process the UL Grant and trigger uplink data transmission. Until UE1's CRT times out, UE1 considers itself to be able to resolve the failure and perform backoff.
  • the uplink transmission of UE1 is interference, which may cause the uplink transmission of UE2 to fail.
  • the uplink transmission may cause erroneous data processing.
  • UE1 since UE1 considers that it has failed to resolve the failure after the CRT expires, The time for resuming random access again will be longer, which increases the delay of random access success.
  • a method for determining a random access competition solution includes:
  • 5101 Send a contention resolution request message Msg3 to the network side, where the contention resolution request message carries a C-RNTI of the UE or a service data unit CCCH SDU of the common control channel;
  • the UE initiates a contention-based random access procedure by using a MAC or PDCCH order, and carries the C-RNTL in the contention resolution request message Msg3.
  • this embodiment may include the following steps:
  • the UE initiates a contention-based random access, and randomly selects a RAP to send to the eNB. Specifically, the UE may initiate contention based random access by MAC or PDCCH order or the like.
  • the eNB sends a RAR message to the UE, where the RAR message may carry the UL Grant and the T C-RNTL temporarily allocated by the eNB for the UE.
  • the UE sends a contention resolution request message Msg3 to the eNB on the resource corresponding to the UL Grant, and the Msg3 carries the C-RNTI allocated by the UE as the MAC control unit of the Msg3.
  • the UE may start the CRT while transmitting the Msg3, wait for the UL Grant of the new data transmission masked by the C-RNTI, or the DL Assignment of the C-RNTI mask, so as to be solved.
  • the UE waits for the UL Grant of the new data transmission masked by the C-RNTI, and initiates a random access scenario for the PDCCH order, at which time the UE waits for the DL Assignment with the C-RNTI masked.
  • the UE Before the CRT times out, the UE receives the DL Assignment (downlink allocation signaling) that is sent by the eNB and is temporarily masked by the T C-RNTI allocated by the eNB.
  • the DL Assignment downlink allocation signaling
  • the UE considers that it is competing to resolve the failure, stops the CRT timing, and performs backoff according to related parameters (such as a Backoff Indicator (BI) in the RAR message).
  • BI Backoff Indicator
  • the UE Since the UE wants to obtain the UL Grant of the new data transmission masked by the C-RNTI or the DL Assignment masked by the C-RNTI, after receiving the DL Assignment masked by the T C-RNTI, the UE considers the competition failure.
  • the specific backoff procedure may be: when the eNB sends the RAR message to the UE in the foregoing S202, the eNB carries the backoff parameter, for example, 20s, which is the maximum time for the UE to back off. In this step, if the UE determines that it has successfully resolved the failure, it will select a random number between 0 and the maximum time 20s, as the backoff time. For example, if the UE selects 10s, the UE sends the RAP again after the backoff for 10s. .
  • the UE before the timer expires, the UE receives the DL Assignment masked by the TC-RNTI, and the signaling is not required by the UE, so the UE confirms that the contention fails, and timely retreats, thereby avoiding the possibility.
  • the erroneous uplink data transmission also avoids the uplink data transmission failure that may be caused to other UEs, and can perform backoff in time, saving the waiting timeout time.
  • this embodiment may include the following steps:
  • S301 to S304 are the same as S201 to S204 in the first embodiment.
  • the eNB Before the CRT times out, the eNB sends, to the UE, a UL Grant masked by the T C-RNTI temporarily allocated by the eNB for the UE.
  • the UE determines whether the HARQ (Hybrid Automatic Repeat Request) process used in the UL Grant is consistent with the HARQ process used when the Msg3 is sent. If they are inconsistent, they think that they are trying to solve the failure to stop the CRT and retreat according to the relevant parameters.
  • HARQ Hybrid Automatic Repeat Request
  • the HARQ process used in the UL Grant is inconsistent with the HARQ process used when the Msg3 is sent, and thus the UE obtains the result of the failure of the contention resolution.
  • the UE After the backoff period, the UE sends the RAP again, and the above steps S301 to S306 are repeated until the random access succeeds or reaches the maximum number of times.
  • the UE receives the temporarily allocated T C-RNTI masked UL Grant sent by the eNB before the timeout of the CRT, and compares whether the HARQ process used in the uplink grant is consistent with the HARQ process used in the last sent Msg3. According to the comparison result, it can be judged whether the self-competition resolution fails, thereby avoiding the uplink data transmission that the UE does not make the judgment after the UL Grant and mistakenly believes that the competition resolution is successful, and avoids the possibility of causing other UEs.
  • Uplink data The transmission fails, and the UE is also prevented from waiting for the CRT to time out to confirm the delay caused by the failure of the competition resolution.
  • the UE may not judge whether the used HARQ process is consistent with the HARQ process used when transmitting Msg3. For example, it can be determined whether the TB (Transport Block) sent by the specified UE in the UL Grant is the same as the TB size used by the UE when transmitting the Msg3 to determine whether the contention resolution fails. If the UE determines that the TB sent by the specified UE in the UL Grant is different from the TB used by the UE when transmitting the Msg3, it considers that it has successfully resolved the failure, performs the backoff, and re-initiates the random access after the backoff time.
  • TB Transport Block
  • the determining whether the UE performs the contention failure may be another form: determining whether the corresponding HARQ process in the UL Grant is consistent with the HARQ process used when the Msg3 is sent, If they are consistent, it is determined whether the TB sent by the UE specified in the UL Grant is consistent with the TB size used by the UE when transmitting the Msg3. If the TB size is inconsistent, it is determined that the UE competes to resolve the failure, and the UE performs the backoff in time.
  • the UE receives the UL Grant sent by the eNB and uses the temporarily allocated T C-RNTI masked, the UE determines whether the corresponding HARQ process in the UL Grant is consistent with the HARQ process used in the Msg3. If they are consistent, the UL Grant is determined.
  • the NDI New Data Indicator indicates whether it is a new transmission. If it is, it confirms that the competition has failed.
  • the UE can be determined by the HARQ process, the size of the TB that specifies the UE to upload data, and whether the NDI indicates whether the new transmission is successful or not, and determines whether the UE has failed to resolve the failure according to the result of one or more judgments, thereby avoiding the UE.
  • the uplink data transmission caused by the error After receiving the UL Grant without making a judgment and mistakenly thinking that the dispute resolution is successful, the uplink data transmission caused by the error also avoids the uplink data transmission failure that may be caused to other UEs, and also prevents the UE from waiting for the CRT timeout to be confirmed. Strive to resolve the delay caused by the failure. As a result of two judgments, the accuracy of judging the failure of the competition resolution is enhanced.
  • This embodiment combines the various judgment methods described in the first embodiment and the second embodiment. A more complete solution, this embodiment is still based on contention-based random access initiated by the UE MAC or initiated by the PDCCH order. As shown in FIG. 4, it is a flowchart of the embodiment, in which the entire process is mainly described from the UE side. This embodiment may include the following steps:
  • the UE sends a RAP to the eNB.
  • the UE receives the RAR sent by the eNB, and the RAR carries the T C-RNTI temporarily allocated by the eNB for the UE.
  • the UE sends a contention resolution request message to the eNB, Msg3, where the C-RNTL allocated by the UE is carried.
  • the UE After transmitting the Msg3, the UE starts the CRT to perform timing, monitors the PDCCH, and performs contention resolution.
  • the UE Before the CRT times out, the UE receives the DL Assignment sent by the eNB and is masked by using the T C-RNTI.
  • step S408 because the UE wants to obtain the UL Grant that is masked by the C-RNTI or the DL Assignment that is masked by the C-RNTI, and the DL that is actually received by the T C-RNTI is actually received. Assignment, thus recognizing that it is competing to resolve the failure, stop the CRT timing, perform the backoff, and re-initiate the random access after a set time has elapsed.
  • the UE Before the CRT times out, the UE receives the UL Grant 0 sent by the eNB and is masked by using the foregoing T C-RNTI.
  • step S406 The UE determines whether the UL Grant process corresponds to the process used by the Msg3, and if the UL Grant corresponding HARQ process does not match the process used by the Msg3, the process may go directly to step S408.
  • step S407a If they are identical, the process proceeds to step S407a, or proceeds to step S407b.
  • the UE when the UL Grant corresponding HARQ process is consistent with the process used by the sending Msg3, the UE further determines whether the NDI in the UL Grant indicates a new data transmission, and if yes, proceeds to the step S408.
  • the UE may determine that the user has failed to resolve the failure, stop the CRT timing, and perform the backoff. Re-initiate random access.
  • the UE completes the random access competition resolution judgment by using a relatively complete solution, so that the UE can perform type determination on the contention response response message fed back by the eNB after the Msg3, if the response message is masked by the T C-RNTI.
  • the DL Assignment can make a conclusion that the competition resolves the failure, and performs the backoff to avoid the timeout waiting. If the response message is the UL Grant masked by the T C-RNTI, it can be used for the HARQ process including the UL Grant in the UL Grant.
  • the fourth embodiment and the fifth embodiment are the method for judging the content of the UE when the UE needs to carry the CCCH SDU in the Msg3. After transmitting the Msg3 message, the UE hopes to obtain the DL Assignment that is masked by the T C-RNTI.
  • This embodiment is similar to the second embodiment, and includes steps S301 to S307 in the second embodiment.
  • the UE uses different judgment principles when the UE determines whether the contention fails according to the received UL Grant.
  • the UE after transmitting the Msg3, the UE starts the CRT timing, and receives the UL Grant sent by the eNB using the temporarily allocated T C-RNTI masked before the CRT times out. At this time, the UE determines whether the HARQ process used in the UL Grant is consistent with the HARQ process used when the Msg3 is transmitted. If they are inconsistent, they think that they are fighting for failure to stop the CRT, and according to the phase In this step, the UE determines that the HARQ process is inconsistent. Therefore, the UE obtains the result of the competition resolution failure, performs backoff, and re-initiates the RAP after the backoff period, until the random access succeeds or reaches the maximum number.
  • the UE receives the temporarily allocated T C-RNTI masked UL Grant sent by the eNB before the timeout of the CRT, and compares whether the HARQ process used in the uplink grant is consistent with the HARQ process used in the last sent Msg3. According to the comparison result, it can be judged whether the self-competition resolution fails, thereby avoiding the uplink data transmission that the UE does not make the judgment after the UL Grant and mistakenly believes that the competition resolution is successful, and avoids the possibility of causing other UEs.
  • the UE may not judge whether the used HARQ process is consistent with the HARQ process used when transmitting Msg3. For example, it may be determined whether the TB sent by the designated UE in the UL Grant is the same as the TB size used by the UE when transmitting the Msg3 to determine whether the contention resolution fails. If the UE determines that the TB sent by the specified UE in the UL Grant is different from the TB used by the UE when transmitting the Msg3, it considers that it has successfully resolved the failure, retreats, and re-starts the random access after a certain period of time.
  • the UE receives the UL Grant sent by the eNB and uses the temporarily allocated T C-RNTI masked, the UE determines whether the corresponding HARQ process in the UL Grant is consistent with the HARQ process used in the Msg3. If they are consistent, the UL Grant is determined.
  • the TB sent by the specified UE is determined according to whether the TB size used by the UE when transmitting the Msg3 is consistent.
  • the UE determines that the TB sent by the specified UE in the UL Grant is different from the TB used by the UE when sending the Msg3, it considers that it has successfully resolved the failure, retreats, and re-initiates the random access after a certain period of time.
  • the UE determines whether the corresponding HARQ process in the UL Grant is consistent with the HARQ process used in the Msg3, and if the UE consistently determines whether the NDI indication in the UL Grant is a new transmission. If yes, confirm that the competition failed.
  • the UE can be determined by the HARQ process, the size of the TB that specifies the UE to upload data, and whether the NDI indicates whether the new transmission is successful or not, and determines whether the UE has failed to resolve the failure according to the result of one or more judgments, thereby avoiding the UE.
  • the uplink data transmission caused by the error After receiving the UL Grant without making a judgment and mistakenly thinking that the dispute resolution is successful, the uplink data transmission caused by the error also avoids the uplink data transmission failure that may be caused to other UEs, and also prevents the UE from waiting for the CRT timeout to be confirmed. Strive to resolve the delay caused by the failure. As a result of two judgments, the accuracy of judging the failure of the competition resolution is enhanced.
  • This embodiment is a relatively complete solution for synthesizing various possible judging methods described in Embodiment 4.
  • This embodiment is still directed to contention-based random access and carries CCCH SDU instead of C in Msg3. -RNTL
  • FIG. 5 it is a flowchart of the embodiment, in which the entire process is mainly described from the UE side.
  • This embodiment may include the following steps:
  • the UE sends a RAP to the eNB.
  • the UE receives the RAR sent by the eNB, and the RAR carries the T C-RNTI temporarily allocated by the eNB for the UE.
  • the UE sends a contention resolution request message Msg3 to the eNB, where the CCCH SDU is carried in the Msg3.
  • the UE After transmitting the Msg3, the UE starts the CRT to perform timing, monitors the PDCCH, and performs contention resolution.
  • the UE Before the CRT times out, the UE receives the UL Grant 0 sent by the eNB and is masked by using the foregoing T C-RNTI.
  • the UE determines whether the UL Grant process is consistent with the process used by the Msg3, and when the UL Grant corresponding HARQ process does not match the process used by the Msg3, the process may go directly to step S508. If they are the same, the process may proceed to step S507a, or go to step S507b.
  • the UE further determines whether the TB size used by the UE in the UL Grant to upload data is the same as the TB size used by the Msg3. If not, the process proceeds to the step. S508.
  • the UE further determines whether the NDI in the UL Grant indicates a new data transmission, and if yes, proceeds to the step
  • the UE may determine that the user has failed to resolve the failure, stop the CRT timing, and perform the backoff, after retreating for a set time. Re-initiate random access.
  • the UE completes the random access competition resolution judgment by using a relatively complete solution, so that the UE can receive the UL Grant that is masked by the T C-RNTI after transmitting the Msg3 carrying the CCCH SDU.
  • the UL Grant includes a HARQ process used by the UL Grant, a size of a TB in which the UE is used to transmit uplink data, and one or more of the NDI indications in the MSI, and a corresponding item in the Msg3 sent by the UE, to determine Accurately determine whether the competition resolves the failure, avoid the uplink data error or waiting timeout that the UE may cause under the wrong judgment, and avoid the uplink data transmission failure that may be caused to other UEs, thereby optimizing the performance of the network system. And save the user's successful access time.
  • an embodiment of the present disclosure further discloses a user equipment UE, including: a transceiver unit 601, configured to send a contention resolution request message to a network side, where the contention resolution request message carries a UE that has been allocated.
  • a transceiver unit 601 configured to send a contention resolution request message to a network side, where the contention resolution request message carries a UE that has been allocated.
  • the first determining unit 602 is configured to receive, before the timeout of the contention resolution timer CRT 604, the network side message that is temporarily masked by the network side for the UE radio network temporary identifier T C-RNTI And determining, according to the signaling type of the C-RNTI or the CCCH SDU and the network side message, whether the contention resolution fails;
  • the backoff unit 603 is configured to perform backoff when the result determined by the first determining unit 602 is that the contention resolution fails;
  • the competition resolution timer CRT 604 is configured to record whether the elapsed time after the sending and receiving unit 601 sends the contention resolution request message exceeds a preset timeout waiting time.
  • the first determining unit 502 may determine that the contention resolution fails; if the transceiver unit 601 receives the T C-RNTI masking The UL Grant, the first judging unit 602 cannot conclude whether the competition has failed, and the second judging unit is required to judge whether the competition resolution fails.
  • the transceiver unit 601 carries the CCCH SDU in Msg3 and receives the T-RNTI-masked UL Grant, although the UE wishes to obtain the T-Assignment of the T C-RNTI, the UL Grant may also be a retransmission request. Therefore, the first judging unit 602 cannot conclude whether the competition has failed, and the second judging unit is also needed to judge whether the competition resolution fails.
  • the UE may further include: a second determining unit, configured to: when the result of the first determining unit determining that the contention failure cannot be determined, according to any one or more of the following Determining whether the competition resolution fails: the HARQ process corresponding to the network side message masked by the T C-RNTI, the size of the transport block used by the UE, and the new data indication identifier.
  • the method that the first judging unit 601 and the second judging unit determine whether the contention resolution fails may refer to the foregoing method 1 to the sixth method for determining the random access competition resolution to implement random access of the UE.
  • an embodiment of the present invention further discloses a network system, including:
  • the user equipment UE701 is configured to send a contention resolution request message to the network device 702, where the contention resolution request message carries the cell radio network temporary identifier C-RNTI or the public control that the UE has allocated. a serving data unit CCCH SDU of the channel; when the contention resolution counter CRT times out before receiving the network side message masked by the cell radio network temporary identifier T C-RNTI temporarily allocated by the network device 702 for the UE, If the contention failure is determined according to the signaling type of the C-RNTI or the CCCH SDU and the network side message, the backoff is performed;
  • the network device 702 is configured to receive a contention resolution request message sent by the UE, and send a network side message masked by the T C-RNTI to the UE.
  • Embodiments of the present invention provide a judging apparatus and system for random access competition resolution, after receiving a network side message masked by T C-RNTI, combining C-RNTI or CCCH SDU carried in Msg3 and the use
  • the type of the network-side message that is blocked by the T-C-RNTI determines whether the contention fails to be resolved. If the result of the judgment is a failure, the UE performs the back-off in time, thereby avoiding possible uplink transmission errors of the UE and avoiding possible The uplink data transmission fails, and it is known whether the contention resolution fails before waiting for the timeout. Therefore, the time for re-initiating the random access after the retreat can be shortened, and the random access is accelerated.

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Description

一种随机接入竟争解决的判断方法、 装置和系统 技术领域
本发明涉及无线通信领域， 尤其涉及一种随机接入竟争解决的判断方法、 装置和系统。
背景技术
在 LTE ( Long Term Evolution, 长期演进 )系统中 , UE ( User Equipment, 用户设备 )通过随机接入过程 ( Random Access Procedure )获得上行同步和上 行资源。 在基于竟争的随机接入过程中， UE从一组 RAP ( Random Access Preamble, 随机接入分配码） 中随机选择一个 RAP, 发起随机接入； 在收到 RAR ( Random Access Response, 随机接入响应）后， 会发送 Msg3 (随机接入 的第三条消息）， 并根据发起随机接入的原因， 在 Msg3 中携带 CCCH SDU ( Common Control Channel Serving Data Unit,公共控制信道的服务数据单元 ) 或 UE的 C-RNTI ( Cell Radio Network Temporary Identifier, 无线网络临时标 识）。 并在发送 Msg3后， UE会启动一个 CRT ( Contention Resolution Timer, 竟争解决定时器）；在 CRT超时前，如果收到竟争解决消息，则认为竟争成功， 如果在 CRT超时后， 还没有竟争解决成功， 则会避退一段时间， 再次发起随 机接入。
现有技术中， 如果是由 UE的 MAC ( Media Access Control, 媒体接入控 制 )发起随机接入过程、 且 Msg3中传输了 C-RNTI作为 MAC 的控制单元， 则 UE在收到 eNB ( Evolved NodeB, 演进型基站 )发送的由该 C-RNTI加掩 的新数据传输的 UL Grant (上行授权）后， 认为竟争解决成功； 在 CRT超时 后， 如果没有收到新数据传输的 UL Grant, 则认为竟争解决失败， UE会避退 一段时间， 再次发起随机接入。
但是现有技术中，对于 UE在发送 Msg3中后的等待时间内，如果收到 eNB 为 UE临时分配的 T C-RNTI ( Temporary C-RNTI )加掩的 DL Assignment (下 行分配）或 UL Grant, UE不对该信息进行处理， 可能导致 UE无法及时判别 是否已经完成竟争解决， 所以可能会导致再次发起随机接入的时间延长。 发明内容
本发明的实施例提供了一种随机接入竟争解决的判断方法、 装置和系统， 能够解决基于竟争的随机接入过程中可能造成 UE 的随机接入成功的时延问 题。
一方面， 提供了一种随机接入竟争解决的判断方法， 包括：
向网络侧发送竟争解决请求消息，所述竟争解决请求消息中携带 UE已分 配的小区无线网络临时标识 C-RNTI或公共控制信道的服务数据单元 CCCH
SDU;
当竟争解决计时器 CRT超时前接收到网络侧为所述 UE临时分配的小区 无线网络临时标识 T C-RNTI加掩的网络侧消息时 , 如果才艮据所述 C-RNTI或 所述 CCCH SDU与所述网络侧消息的信令类型判断竟争解决失败， 则进行退 避。
另一方面， 提供了一种用户设备 UE, 包括：
收发单元， 用于向网络侧发送竟争解决请求消息， 所述竟争解决请求消 息中携带 UE已分配的小区无线网络临时标识 C-RNTI或公共控制信道的服务 数据单元 CCCH SDU;
第一判断单元， 用于在所述收发单元在竟争解决计时器 CRT超时前接收 到用网络侧为所述 UE临时分配的小区无线网络临时标识 T C-RNTI加掩的网 络侧消息时， 根据所述 C-RNTI或 CCCH SDU与所述网络侧消息的信令类型 判断竟争解决是否失败；
退避单元， 在所述第一判断单元判断的结果为竟争解决失败时进行退避； 竟争解决计时器 CRT, 用于记录所述收发单元发送所述竟争解决请求消 息后经过的时间是否超过预设超时等待时间。
再一方面， 提供了一种网络系统， 包括：
用户设备 UE, 用于向网络设备发送竟争解决请求消息， 所述竟争解决请 求消息中携带 UE已分配的小区无线网络临时标识 C-RNTI或公共控制信道的 服务数据单元 CCCH SDU; 当竟争解决计时器 CRT超时前接收到用所述网络 设备为所述 UE临时分配的小区无线网络临时标识 T C-RNTI加掩的网络侧消 息时， 如果根据所述 C-RNTI或 CCCH SDU与所述网络侧消息的信令类型判 断竟争解决失败， 则进行退避；
网络设备，用于接收所述 UE发送的竟争解决请求消息， 并向所述用户设 备发送用 T C-RNTI加掩的网络侧消息。
本发明的实施例一种随机接入竟争解决的判断方法、 装置和系统， 在接 收到用 T C-RNTI加掩的网络侧消息后， 结合在 Msg3 中携带的 C-RNTI或 CCCH SDU以及该用 T C-RNTI加掩的网络侧消息的类型判断竟争解决是否 失败， 如果判断的结果为失败则 UE及时进行退避， 因而避免了 UE可能的上 行发送错误，也避免了可能对其它 UE造成的上行数据发送失败， 并且在等待 超时前即可获知竟争解决是否失败， 所以能够缩短经过退避再次发起随机接 入的时间， 加快随机接入成功。
附图说明
图 1为本发明实施例随机接入竟争解决的判断方法的流程图；
图 2为本发明实施例一的示意图
图 3为本发明实施例二的示意图
图 4为本发明实施例三的流程图
图 5为本发明实施例五的流程图
图 6为本发明实施例 UE的示意图；
图 7为本发明实施例网络系统的示意图。
具体实施方式
下面结合附图对本发明实施例一种随机接入竟争解决的判断方法、 装置 和系统进行详细描述。 应当明确， 所描述的实施例仅仅是本发明一部分实施 例， 而不是全部的实施例。 基于本发明中的实施例， 本领域普通技术人员在 没有作出创造性劳动的前提下所获得的所有其它实施例， 都属于本发明保护 的范围。 现有技术中， 对于 UE在发送 Msg3中后的等待时间内， 收到 eNB为 UE 临时分配的 T C-RNTI加掩的 DL Assignment或 UL Grant, 现有技术还无法判 别竟争解决是否失败。 例如， 处于 Connected (连接） 态的 UE1 与处理 Idle (空闲）态的 UE2 ,由 MAC触发随机接入 ,且在相同的时间及 PRACH( Physical Random Access Channel , 物理随机接入信道 ) 资源上选择发送相同的 RAP , 之后 UE1和 UE2均收到 eNB发送的 RAR, RAR中携带为 UE临时分配的 T C-RNTL 并且 UE1和 UE2此时均认为 RAR是属于自己的， 并记录 RAR消 息中的 T C-RNTI。 则 UE1和 UE2将发送各自的 Msg3消息， 其中 UE1发送 的 Msg3消息中包含自己的 C-RNTI, UE2发送的消息中携带 CCCH SDU。 如 果最终 UE2竟争成功，则 UE2会收到竟争解决响应消息 Msg4,该消息用 RAR 中的 eNB为 UE2临时分配的 T C-RNTI加掩的 PDCCH ( Physical Downlink Control Channel, 物理下行控制信道）命令通知， 此时 eNB 临时分配的 T C-RNTI成为 UE2的正式的 C-RNTI。
在 UE1 的 CRT超时前， UE1仍然在等待竟争解决响应消息， 此时如果 eNB使用 UE2的 C-RNTI为 UE2分配 UL Grant, 则 UE1认为该 C-RNTI为 eNB为自己临时分配的 T C-RNTI, 则会处理该 UL Grant, 并触发上行数据发 送。 直到 UE1的 CRT超时后， UE1才认为自己竟争解决失败， 进行退避。
对于 UE2, UE1的上行发送是干扰， 可能导致 UE2的上行发送失败； 对 于 UE1 ,其上行发送会导致错误的数据处理； 同时，由于 UE1在 CRT超时后， 才认为自己竟争解决失败， 所以经过退避再次发起随机接入的时间会相应变 长， 增加了随机接入成功的时延。
如图 1所示， 本发明的实施例一种随机接入竟争解决的判断方法， 包括：
5101、 向网络侧发送竟争解决请求消息 Msg3 , 所述竟争解决请求消息中 携带 UE的 C-RNTI或公共控制信道的服务数据单元 CCCH SDU;
5102、 当竟争解决计时器 CRT超时前接收到用网络侧为所述 UE临时分 配的小区无线网络临时标识 T C-RNTI加掩的网络侧消息时， 如果根据所述 C-RNTI或 CCCH SDU与所述网络侧消息的信令类型判断竟争解决失败， 则 进行退避。
以下将通过各种场景下本发明实施例的应用进行更为具体的说明。 以下 实施例的顺序不代表优选顺序。 在以下的实施例一至实施例三中， UE 通过 MAC或 PDCCH命令发起基于竟争的随机接入过程， 并且在竟争解决请求消 息 Msg3中携带 C-RNTL
实施例一
如图 2所示， 本实施例可以包括如下步骤：
S201、 UE发起基于竟争的随机接入， 并随机选择一个 RAP发送给 eNB。 具体地， UE可以由 MAC或 PDCCH命令等发起基于竟争的随机接入。
S202、 eNB向 UE发送 RAR消息， 该 RAR消息中可以携带有 UL Grant 以及 eNB为 UE临时分配的 T C-RNTL
S203、UE在 UL Grant对应的资源上向 eNB发送竟争解决请求消息 Msg3 , Msg3中携带 UE已分配的 C-RNTI作为 Msg3的 MAC控制单元。
5204、 UE可以在发送 Msg3的同时启动 CRT, 等待以 C-RNTI加掩的新 数据传输的 UL Grant或以 C-RNTI加掩的 DL Assignment, 以便竟争解决。
对于 MAC发起随机接入的场景， 此时 UE等待以 C-RNTI加掩的新数据 传输的 UL Grant, 对于 PDCCH命令发起随机接入的场景， 此时 UE等待以 C-RNTI加掩的 DL Assignment
5205、在 CRT超时前， UE收到 eNB发送的用 eNB临时分配的 T C-RNTI 加掩的 DL Assignment (下行分配信令）。
5206、 UE认为自己竟争解决失败， 停止 CRT计时， 并根据相关参数 (如 RAR消息中的退避指示 （ Backoff Indicator, BI ) )进行退避。
由于 UE希望得到的是以 C-RNTI加掩的新数据传输的 UL Grant或以 C-RNTI加掩的 DL Assignment, 在接收到以 T C-RNTI加掩的 DL Assignment 后， 因而 UE认为竟争失败。
具体的退避过程可以为：在上述的 S202中 eNB向 UE发送 RAR消息时 , 会在该消息中携带退避参数， 例如 20s, 该参数为 UE进行退避的最大时间。 而在本步骤中， 如果 UE判定自己竟争解决失败， 则会在 0与最大时间 20s之 间选择一个随机数， 作为退避时间， 例如 UE选择了 10s, 则 UE在退避 10s 之后则再次发送 RAP。
S207、 退避一段时间后， UE再次发送 RAP, 重复以上步骤 S201 ~ S206, 直到随机接入成功或达到最大次数。
本实施例中， 在计时器超时前， UE 接收到以 TC-RNTI 加掩的 DL Assignment, 该信令不是 UE所希望接收到的， 因而 UE确认自己竟争失败， 及时进行退避，避免了可能的错误上行数据发送，也避免了可能对其它 UE造 成的上行数据发送失败， 能够及时进行退避， 节省了等待超时的时间。
实施例二
如图 3所示， 本实施例可以包括如下步骤：
S301至 S304与实施例一中的 S201至 S204相同。
S305、在 CRT超时前， eNB向 UE发送用 eNB为 UE临时分配的 T C-RNTI 加掩的 UL Grant。
5306、 UE 判断 UL Grant 中使用的 HARQ ( Hybrid Automatic Repeat Request , 混合自动重传请求 )进程与发送 Msg3时使用的 HARQ进程是否一 致。 如果不一致， 则认为自己竟争解决失败停止 CRT, 并根据相关参数进行 退避。
在本步骤中， UL Grant 中使用的 HARQ进程与发送 Msg3时使用的 HARQ 进程不一致， 因而 UE得到了竟争解决失败的结果。
5307、 退避一段时间后， UE再次发送 RAP, 重复以上步骤 S301 ~ S306, 直到随机接入成功或达到最大次数。
本实施例 UE在 CRT超时前接收到了 eNB发送的临时分配的 T C-RNTI 加掩的 UL Grant, 并比较该上行授权中使用的 HARQ 进程与上一次发送的 Msg3中使用的 HARQ进程是否一致，能够根据比较结果判断自身竟争解决是 否失败， 从而避免了 UE在接收到在 UL Grant后不进行判断而误认为竟争解 决成功而造成错误的上行数据发送，也避免了可能对其它 UE造成的上行数据 发送失败， 同时也避免了 UE要等待 CRT超时， 才能确认竟争解决失败造成 的时延。
在本实施例的步骤 S306中，UE在接收到 S305中的 T C-RNTI加掩的 UL Grant后， 也可以不对使用的 HARQ进程与发送 Msg3时使用的 HARQ进程 是否一致进行判断。 例如， 可以采用判断 UL Grant 中指定 UE 发送的 TB(Transport Block, 上行传输块)与 UE在发送 Msg3时使用的 TB大小是否相 同来确定竟争解决是否失败。如果 UE判断 UL Grant中指定 UE发送的 TB与 UE在发送 Msg3时使用的 TB大小不同， 则认为自己竟争解决失败， 进行退 避， 并在退避一定时间后， 重新发起随机接入。
此外， 在本实施例的步骤 S306中， UE进行竟争解决是否失败的判断还 可以采用另一种形式： 先判断 UL Grant中对应的 HARQ进程与发送 Msg3时 使用的 HARQ进程是否一致进行判断， 如果一致， 则再对 UL Grant中指定 UE发送的 TB与 UE在发送 Msg3时使用的 TB大小是否一致进行判断。如果 TB大小不一致， 则确定 UE竟争解决失败， UE及时进行退避。
还有另一种判断竟争解决是否失败的方法。 如果在 CRT 超时前接收到 eNB发送的使用临时分配的 T C-RNTI加掩的 UL Grant, UE判断 UL Grant 中对应的 HARQ进程与 Msg3中使用的 HARQ进程是否一致， 如果一致， 则 判断 UL Grant中 NDI ( New Data Indicator, 新数据指示标识 )指示是否为新 传， 如果是， 则确认竟争失败。
可以通过 HARQ进程、 指定 UE上传数据的 TB的大小和 NDI指示是否 为新传对竟争解决是否失败进行判断 ,根据一项或多项判断的结果确定 UE竟 争解决是否失败， 从而避免了 UE在接收到在 UL Grant后不进行判断而误认 为竟争解决成功而造成错误的上行数据发送，也避免了可能对其它 UE造成的 上行数据发送失败， 还避免了 UE要等待 CRT超时， 才能确认竟争解决失败 造成的时延。 由于通过两次判断， 因而增强了判断竟争解决失败的准确性。 实施例三
本实施例为将实施例一和实施例二中所述的各种判断方法进行综合得到 的一个较为完善的方案， 本实施例仍由 UE MAC发起或 PDCCH命令发起的 基于竟争的随机接入。 如图 4所示， 为本实施例的流程图， 在该流程图中主 要从 UE侧来对整个流程进行描述。 本实施例可以包括如下步骤：
S401、 UE向 eNB发送 RAP。
5402、 UE接收 eNB发送的 RAR, 在 RAR在携带着 eNB为 UE临时分 配的 T C-RNTI。
5403、 UE向 eNB发起竟争解决请求消息 Msg3 , Msg3中携带着 UE已分 配的 C-RNTL
5404、 UE在发送 Msg3后， 同时启动 CRT进行计时， 监听 PDCCH, 进 行竟争解决。
S405a、 在 CRT超时之前， UE接收到 eNB发送的使用上述 T C-RNTI加 掩的 DL Assignment
之后则直接转到步骤 S408, 由于 UE希望得到的是以 C-RNTI加掩的 UL Grant或以 C-RNTI加掩的 DL Assignment, 而实际接收到的却是以 T C-RNTI 加掩的 DL Assignment, 因而认定自己竟争解决失败， 停止 CRT计时， 进行退 避， 并在退避一设定时间后， 重新发起随机接入。
S405b、 在 CRT超时之前， UE接收到 eNB发送的使用上述 T C-RNTI加 掩的 UL Grant0
S406、 UE进行判定， UL Grant对应 HARQ进程与发送 Msg3使用的进程 是否一致， 在 UL Grant对应 HARQ进程与发送 Msg3使用的进程不一致时， 可以直接到步骤 S408。
如果一致， 则可以进入步骤 S407a, 或进入步骤 S407b。
S407a、 在 UL Grant对应 HARQ进程与发送 Msg3使用的进程一致的情 况下， UE进一步判断 UL Grant中指定 UE上传数据时使用的 TB大小是否与 发送 Msg3使用的 TB大小一致， 如果不一致， 则进入步骤 S408。
S407b、 在 UL Grant对应 HARQ进程与发送 Msg3使用的进程一致时， UE进一步判断 UL Grant中 NDI是否指示新数据传输， 如果是， 则进入步骤 S408。
S408、 在 S407a得到否的结论、 或 S407b得到是的结论、 或 S406得到否 的情况下， UE都可以认定为自己竟争解决失败， 停止 CRT计时， 并进行退 避， 在退避一设定时间后重新发起随机接入。
本实施例通过一种较为完善的方案完成了 UE随机接入竟争解决判断，使 得 UE能够对 Msg3之后 eNB反馈的竟争解决响应消息进行类型判断， 如果 响应消息为以 T C-RNTI加掩的 DL Assignment, 则可作出竟争解决失败的结 论， 进行退避， 避免进行超时等待； 如果响应消息为以 T C-RNTI加掩的 UL Grant, 则能够针对 UL Grant中包括 UL Grant使用的 HARQ进程、 其中指定 UE用来传输上行数据的 TB的大小以及其中的 NDI指示中的一项或多项与 UE发送的 Msg3中的相应项， 进行判别， 从而能够准确地做出竟争解决是否 失败的判断，避免 UE在错误判断下可能造成的上行数据错误或等待超时，也 避免了可能对其它 UE造成的上行数据发送失败， 从而优化了网络系统的性 能， 并节省了用户成功接入的时间。
以下实施例四和实施例五为 UE在 Msg3中需要携带 CCCH SDU时的竟 争解决判断方法。 在发送 Msg3消息后， UE希望得到的是以 T C-RNTI加掩 的 DL Assignment
实施例四
该实施例与实施例二类似， 也包括实施例二中步骤 S301 ~ S307。
本实施例在步骤 S303 发送的 Msg3 中携带的是 CCCH SDU 而不是 C-RNTL 在步骤 S306中 UE根据接收到的 UL Grant进行竟争解决是否失败 的判断时， 采用不同的判断原则。
具体地， 在本实施例中， UE在发送 Msg3之后， 启动 CRT计时， 并在 CRT超时前接收到 eNB发送的使用临时分配的 T C-RNTI加掩的 UL Grant。 此时， UE判断 UL Grant中使用的 HARQ进程与发送 Msg3时使用的 HARQ 进程是否一致。 如果不一致， 则认为自己竟争解决失败停止 CRT, 并根据相 在本步骤中， UE判断得到 HARQ进程不一致的结论， 因而 UE得到了 竟争解决失败的结果， 进行退避， 并在退避一段时间后重新发起 RAP, 直到 随机接入成功或达到最大次数。
本实施例 UE在 CRT超时前接收到了 eNB发送的临时分配的 T C-RNTI 加掩的 UL Grant, 并比较该上行授权中使用的 HARQ 进程与上一次发送的 Msg3中使用的 HARQ进程是否一致，能够根据比较结果判断自身竟争解决是 否失败， 从而避免了 UE在接收到在 UL Grant后不进行判断而误认为竟争解 决成功而造成错误的上行数据发送，也避免了可能对其它 UE造成的上行数据 发送失败， 同时也避免了 UE要等待 CRT超时， 才能确认竟争解决失败造成 的时延。
同以上的实施例二一样， S306中同样也可以采用其它的判断方法判断竟 争解决是否失败。 一些其它判断方法可以参照以下所述。
在本实施例的步骤 S306中，UE在接收到 S305中的 T C-RNTI加掩的 UL Grant后， 也可以不对使用的 HARQ进程与发送 Msg3时使用的 HARQ进程 是否一致进行判断。 例如， 可以采用判断 UL Grant中指定 UE发送的 TB与 UE在发送 Msg3时使用的 TB大小是否相同来确定竟争解决是否失败。 如果 UE判断 UL Grant中指定 UE发送的 TB与 UE在发送 Msg3时使用的 TB大小 不同， 则认为自己竟争解决失败， 进行退避， 并在退避一定时间后， 重新发 起随机接入。
还有另一种判断竟争解决是否失败的方法。 如果在 CRT 超时前接收到 eNB发送的使用临时分配的 T C-RNTI加掩的 UL Grant, UE判断 UL Grant 中对应的 HARQ进程与 Msg3中使用的 HARQ进程是否一致， 如果一致， 则 判断 UL Grant中指定 UE发送的 TB与 UE在发送 Msg3时使用的 TB大小是 否一致进行判断。如果 UE判断 UL Grant中指定 UE发送的 TB与 UE在发送 Msg3时使用的 TB大小不同， 则认为自己竟争解决失败， 进行退避， 并在退 避一定时间后， 重新发起随机接入。
还有另一种判断竟争解决是否失败的方法。 如果在 CRT 超时前接收到 eNB发送的使用临时分配的 T C-RNTI加掩的 UL Grant, UE判断 UL Grant 中对应的 HARQ进程与 Msg3中使用的 HARQ进程是否一致， 如果一致， 则 判断 UL Grant中 NDI指示是否为新传， 如果是， 则确认竟争失败。
可以通过 HARQ进程、 指定 UE上传数据的 TB的大小和 NDI指示是否 为新传对竟争解决是否失败进行判断 ,根据一项或多项判断的结果确定 UE竟 争解决是否失败， 从而避免了 UE在接收到在 UL Grant后不进行判断而误认 为竟争解决成功而造成错误的上行数据发送，也避免了可能对其它 UE造成的 上行数据发送失败， 还避免了 UE要等待 CRT超时， 才能确认竟争解决失败 造成的时延。 由于通过两次判断， 因而增强了判断竟争解决失败的准确性。
实施例五
本实施例为将实施例四中所述的各种可能的判断方法进行综合得到的一 个较为完善的方案， 本实施例仍针对基于竟争的随机接入且在 Msg3 中携带 CCCH SDU而不是 C-RNTL
如图 5所示， 为本实施例的流程图，在该流程图中主要从 UE侧来对整个 流程进行描述。 本实施例可以包括如下步骤：
5501、 UE向 eNB发送 RAP。
5502、 UE接收 eNB发送的 RAR, 在 RAR在携带着 eNB为 UE临时分 配的 T C-RNTI。
5503、 UE向 eNB发起竟争解决请求消息 Msg3 , Msg3中携带着 CCCH SDU。
5504、 UE在发送 Msg3后， 同时启动 CRT进行计时， 监听 PDCCH, 进 行竟争解决。
5505、 在 CRT超时之前， UE接收到 eNB发送的使用上述 T C-RNTI加 掩的 UL Grant0
5506、 UE进行判定， UL Grant对应 HARQ进程与发送 Msg3使用的进程 是否一致， 在 UL Grant对应 HARQ进程与发送 Msg3使用的进程不一致时， 可以直接到步骤 S508。 如果一致， 则可以进入步骤 S507a, 或进入步骤 S507b。
S507a、 在 UL Grant对应 HARQ进程与发送 Msg3使用的进程一致的情 况下， UE进一步判断 UL Grant中指定 UE上传数据时使用的 TB大小是否与 发送 Msg3使用的 TB大小一致， 如果不一致， 则进入步骤 S508。
S507b、 在 UL Grant对应 HARQ进程与发送 Msg3使用的进程一致时，
UE进一步判断 UL Grant中 NDI是否指示新数据传输， 如果是， 则进入步骤
S508。
S508、 在 S507a得到否的结论、 或 S507b得到是的结论、 或 S506得到否 的情况下， UE都可以认定为自己竟争解决失败， 停止 CRT计时， 并进行退 避， 在退避一设定时间后重新发起随机接入。
本实施例通过一种较为完善的方案完成了 UE随机接入竟争解决判断，使 得 UE能够在发送携带 CCCH SDU的 Msg3之后， 如果接收到用 T C-RNTI 加掩的 UL Grant, 则能够针对 UL Grant中包括 UL Grant使用的 HARQ进程、 其中指定 UE用来传输上行数据的 TB的大小以及其中的 NDI指示中的一项或 多项与 UE发送的 Msg3中的相应项， 进行判别， 从而能够准确地做出竟争解 决是否失败的判断，避免 UE在错误判断下可能造成的上行数据错误或等待超 时，也避免了可能对其它 UE造成的上行数据发送失败，从而优化了网络系统 的性能， 并节省了用户成功接入的时间。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分流 程， 是可以通过计算机程序来指令相关的硬件来完成， 所述的程序可存储于 一计算机可读取存储介质中， 该程序在执行时， 可包括如上述各方法的实施 例的流程。其中，所述的存储介质可为磁碟、光盘、只读存储记忆体（ Read-Only Memory, ROM )或随机存^ ^己忆体 ( Random Access Memory, RAM )等。 如图 6所示， 本方面的实施例还公开了一种用户设备 UE, 包括： 收发单元 601 , 用于向网络侧发送竟争解决请求消息， 所述竟争解决请求 消息中携带 UE已分配的小区无线网络临时标识 C-RNTI或公共控制信道的服 务数据单元 CCCH SDU;
第一判断单元 602, 用于在所述收发单元 601在竟争解决计时器 CRT604 超时前接收到用网络侧为所述 UE 临时分配的小区无线网络临时标识 T C-RNTI加掩的网络侧消息时 ,才艮据所述 C-RNTI或 CCCH SDU与所述网络侧 消息的信令类型判断竟争解决是否失败；
退避单元 603 ,用于在所述第一判断单元 602判断的结果为竟争解决失败 时进行退避；
竟争解决计时器 CRT604, 用于记录所述收发单元 601发送所述竟争解决 请求消息后经过的时间是否超过预设超时等待时间。
如果收发单元 601在 Msg3中携带了 C-RNTI, 且接收到 T C-RNTI加掩 的 DLAssignment, 则第一判断单元 502可以判定竟争解决失败； 如果收发单 元 601接收到 T C-RNTI加掩的 UL Grant,则第一判断单元 602无法得出竟争 是否失败的结论， 还需第二判断单元来判断竟争解决是否失败。
如果收发单元 601在 Msg3中携带了 CCCH SDU,且接收到 T C-RNTI加 掩的 UL Grant, 尽管 UE希望得到的 T C-RNTI加掩的 DLAssignment, 但由 于 UL Grant也可能是重传请求， 因而第一判断单元 602无法得出竟争是否失 败的结论， 还需第二判断单元来判断竟争解决是否失败。
因而在上述方案及基石出上， 所述 UE进一步还可以包括： 第二判断单元， 用于在所述第一判断单元判断的结果不能确定竟争解决失败时， 根据以下任 一项或多项判断竟争解决是否失败： 所述用 T C-RNTI加掩的网络侧消息对应 的 HARQ进程、 指定所述 UE使用的传输块的大小和新数据指示标识。
具体地， 第一判断单元 601 和第二判断单元判断竟争解决是否失败的方 法可以参照上述随机接入竟争解决的判断方法实施例一至实施例六， 实现 UE 的随机接入。
如图 7所示， 本发明的实施例还公开了一种网络系统， 包括：
用户设备 UE701 , 用于向网络设备 702发送竟争解决请求消息， 所述竟 争解决请求消息中携带 UE已分配的小区无线网络临时标识 C-RNTI或公共控 制信道的服务数据单元 CCCH SDU; 当竟争解决计时器 CRT超时前接收到用 所述网络设备 702为所述 UE临时分配的小区无线网络临时标识 T C-RNTI加 掩的网络侧消息时， 如果根据所述 C-RNTI或 CCCH SDU与所述网络侧消息 的信令类型判断竟争解决失败， 则进行退避；
网络设备 702, 用于接收所述 UE发送的竟争解决请求消息， 并向所述 UE发送用 T C-RNTI加掩的网络侧消息。
本发明的实施例一种随机接入竟争解决的判断装置和系统，在接收到用 T C-RNTI加掩的网络侧消息后 , 结合在 Msg3中携带的 C-RNTI或 CCCH SDU 以及该用 T C-RNTI加掩的网络侧消息的类型判断竟争解决是否失败，如果判 断的结果为失败则 UE及时进行退避， 因而避免了 UE可能的上行发送错误， 也避免了可能对其它 UE造成的上行数据发送失败，并且在等待超时前即可获 知竟争解决是否失败， 所以能够缩短经过退避再次发起随机接入的时间， 加 快随机接入成功。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于 此， 任何熟悉本技术领域的技术人员在本发明揭露的技术范围内， 可轻易想 到的变化或替换， 都应涵盖在本发明的保护范围之内。 因此， 本发明的保护 范围应以权利要求的保护范围为准。

Claims

权利 要求 书
1、 一种随机接入竟争解决的判断方法， 其特征在于， 包括：
向网络侧发送竟争解决请求消息， 所述竟争解决请求消息中携带用户设备 已分配的小区无线网络临时标识 C-RNTI 或公共控制信道的服务数据单元 CCCH SDU;
当竟争解决计时器 CRT超时前接收到网络侧为所述用户设备临时分配的小 区无线网络临时标识 T C-RNTI加掩的网络侧消息时 , 如果才艮据所述 C-RNTI或 所述 CCCH SDU与所述网络侧消息的信令类型判断竟争解决失败，则进行退避。
2、 根据权利要求 1所述的方法， 其特征在于， 所述竟争解决请求消息中携 带 C-RNTI, 所述如果根据所述 C-RNTI与所述网络侧消息的信令类型判断竟争 解决失败， 具体包括：
如果所述网络侧消息的信令类型为下行分配信令， 则确认竟争失败； 或者， 如果所述网络侧消息的信令类型为上行授权信令， 根据所述上行授 权信令对应的混合自动重传请求 HARQ进程、 指定所述用户设备使用的传输块 的大小和新数据指示标识中的任一项或多项判断竟争解决失败。
3、 根据权利要求 1所述的方法， 其特征在于， 如果在所述竟争解决请求消 息中携带 CCCH SDU,所述如果根据所述 CCCH SDU与所述网络侧消息的信令 类型判断竟争解决失败， 具体包括：
如果所述网络侧消息的信令类型为上行授权信令， 根据所述上行授权信令 对应的 HARQ进程、 指定所述用户设备使用的传输块的大小和新数据指示标识 中的任一项或多项判断竟争解决失败。
4、 根据权利要求 2或 3所述的方法， 其特征在于， 所述根据所述上行授权 信令对应的 HARQ进程、 指定所述用户设备使用的传输块的大小和新数据指示 标识中的任一项或多项判断竟争解决失败， 包括：
判断所述上行授权信令对应的 HARQ进程与所述竟争解决请求消息使用的 HARQ进程是否一致， 如果不一致， 则确认竟争解决失败； 或者，
判断所述上行授权信令中指定所述用户设备使用的传输块的大小与所述竟 争解决请求消息使用的传输块的大小是否一致， 如果不一致， 则确认竟争解决 失败。
5、 根据权利要求 2或 3所述的方法， 其特征在于， 所述基于所述上行授权 信令对应的 HARQ进程、 指定所述用户设备使用的传输块的大小和新数据指示 标识中的任一项或多项判断竟争解决是否失败， 包括：
判断所述上行授权信令对应的 HARQ进程与所述竟争解决请求消息使用的 HARQ进程是否一致；
如果一致， 则所述方法进一步包括： 判断所述上行授权信令中指定所述用 户设备使用的传输块的大小与所述竟争解决请求消息使用的传输块的大小是否 一致， 如果不一致， 则确认竟争失败； 或判断所述上行授权信令中新数据指示 标识指示是否为新传， 如果是， 则确认竟争失败。
6、 一种用户设备， 其特征在于， 包括：
收发单元， 用于向网络侧发送竟争解决请求消息， 所述竟争解决请求消息 中携带用户设备已分配的小区无线网络临时标识 C-RNTI 或公共控制信道的服 务数据单元 CCCH SDU;
第一判断单元， 用于在所述收发单元在竟争解决计时器 CRT超时前接收到 用网络侧为所述用户设备临时分配的小区无线网络临时标识 T C-RNTI加掩的 网络侧消息时， 根据所述 C-RNTI或 CCCH SDU与所述网络侧消息的信令类型 判断竟争解决是否失败；
退避单元， 用于在所述第一判断单元判断的结果为竟争解决失败时进行退 避；
竟争解决计时器 CRT, 用于记录所述收发单元发送所述竟争解决请求消息 后经过的时间是否超过预设超时等待时间。
7、 根据权利要求 6所述的方法， 其特征在于， 所述用户设备进一步包括： 第二判断单元， 用于在所述第一判断单元判断的结果不能确定竟争解决失 败时， 根据以下任一项或多项判断竟争解决是否失败： 所述用 T C-RNTI加掩的 网络消息对应的 HARQ进程、 指定所述用户设备使用的传输块的大小和新数据 指示标识；
所述退避单元还用于在所述第二判断单元判断的结果为竟争解决失败时进 行退避。
8、 一种网络系统， 其特征在于， 包括：
用户设备， 用于向网络设备发送竟争解决请求消息， 所述竟争解决请求消 息中携带用户设备已分配的小区无线网络临时标识 C-RNTI 或公共控制信道的 服务数据单元 CCCH SDU; 当竟争解决计时器 CRT超时前接收到用所述网络设 备为所述用户设备临时分配的小区无线网络临时标识 T C-RNTI加掩的网络侧 消息时， 如果根据所述 C-RNTI或 CCCH SDU与所述网络侧消息的信令类型判 断竟争解决失败， 则进行退避；
网络设备， 用于接收所述用户设备发送的竟争解决请求消息， 并向所述用 户设备发送用 T C-RNTI加掩的网络侧消息。
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