WO2017024912A1 - Procédé, dispositif, et système d'accès aléatoire - Google Patents

Procédé, dispositif, et système d'accès aléatoire Download PDF

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Publication number
WO2017024912A1
WO2017024912A1 PCT/CN2016/089421 CN2016089421W WO2017024912A1 WO 2017024912 A1 WO2017024912 A1 WO 2017024912A1 CN 2016089421 W CN2016089421 W CN 2016089421W WO 2017024912 A1 WO2017024912 A1 WO 2017024912A1
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WO
WIPO (PCT)
Prior art keywords
ack
terminal
nack feedback
msg3
rnti
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PCT/CN2016/089421
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English (en)
Chinese (zh)
Inventor
高雪娟
邢艳萍
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电信科学技术研究院
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Publication of WO2017024912A1 publication Critical patent/WO2017024912A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • 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
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a random access method, device, and system in a coverage enhancement scenario.
  • the contention of the random access means that the base station (eNodeB, eNB for short) does not allocate dedicated resources for the terminal (User Terminal, User Equipment, UE), and is randomly initiated by the terminal.
  • Competitive random access is applicable to all five scenarios: for the scenario of radio resource control (RRC) connection establishment, RRC connection reestablishment, and uplink data arrival, random access is completely autonomous by the terminal, and the eNB does not have any prior.
  • RRC radio resource control
  • the terminal initiates random access according to the indication of the eNB.
  • the eNB preferentially selects non-contention random access, and only when the non-contention random access resource is insufficiently allocated, Instruct the terminal to initiate a contention random access.
  • the competitive random access process is completed in four steps. As shown in Figure 1, each step is called a message (Msg for short), and these four steps are called Msg1 to Msg4. among them:
  • the message is an uplink message, which is sent by the terminal, and is received by the eNB, and the bearer is sent in a physical random access channel (Physical Random Access Channel, PRACH for short).
  • PRACH Physical Random Access Channel
  • the preamble sequence sent by the terminal is randomly selected in the specific preamble set, and the different preamble sequences have different identification information, that is, a preamble index.
  • the message is a downlink message, which is sent by the eNB and received by the terminal.
  • Msg2 is the response of the eNB to the random access initiated by the terminal after receiving the Msg1, and must be sent in the random access response window.
  • the start of the random access response window is the first available downlink subframe that satisfies n+3, and n is the last subframe transmitted by the preamble sequence, and the length is 2 to 10 ms, which is specified by the eNB in the system message.
  • the Msg2 is carried by a Downlink Shared Channel (DL-SCH) defined by a Media Access Control (MAC) layer, and corresponds to a Physical Downlink Shared Channel (PDSCH) at the physical layer.
  • DL-SCH Downlink Shared Channel
  • MAC Media Access Control
  • PDSCH Physical Downlink Shared Channel
  • An Msg2 can respond to the random access request of multiple terminals, that is, the RAR of multiple terminals at the same time. Therefore, the Msg2 does not have a Hybrid Automatic Repeat ReQuest (HARQ) process, that is, there is no feedback retransmission process.
  • HARQ Hybrid Automatic Repeat ReQuest
  • the eNB schedules Msg2, RA by using a Physical Downlink Control Channel (PDCCH) scrambled by a Random Access Radio Network Temporary Identifier (RA-RNTI) transmitted in a common search space.
  • PDCCH Physical Downlink Control Channel
  • RA-RNTI Random Access Radio Network Temporary Identifier
  • the RNTI is determined by the location of the PRACH time-frequency resource for transmitting the Msg1; the terminal that uses the same PRACH time-frequency resource calculates the same RA-RNTI, and the RAR information is packetized and sent in the same RAR message, and the RAR message is carried by the RA-
  • the RNTI scrambled PDCCH schedules the downlink shared channel, and the downlink shared channel also uses the RA-RNTI for scrambling.
  • the content of the Msg2 includes: a backoff parameter, identification information of a preamble sequence corresponding to Msg1, an uplink transmission timing advance (TA), and an uplink scheduling grant of Msg3 (UL grant, also referred to as a RAR grant at the physical layer).
  • TA uplink transmission timing advance
  • UL grant also referred to as a RAR grant at the physical layer.
  • the backoff parameter is used to indicate the average delay of the next time the terminal initiates random access if the random access fails.
  • the terminal identifies the RAR message carrying the RAR (ie, Msg2 sent in the DL-SCH) by using the RA-RNTI determined by the PRACH time-frequency domain resource used by the preamble sequence in Msg1, and the RAR message is based on itself. Identification letter of the preamble sequence sent in Msg1 The information determines the RAR sent to itself. If the terminal does not correctly receive the Msg2, the delay of the next random access is determined according to the delay limit of the backoff parameter, and the random access resource is selected to initiate the next random access. After the maximum number of random accesses is reached, the MAC layer of the terminal reports a random access problem to the RRC layer, triggering a Radio Link Failure (RLF) process.
  • RLF Radio Link Failure
  • the message is an uplink message, which is sent by the terminal and received by the eNB.
  • the terminal After receiving the Msg2, the terminal performs the uplink transmission on the uplink resource indicated by the UL grant (ie, the RAR grant) included in the obtained RAR, that is, the physical uplink shared channel is transmitted according to the scheduling information in the RAR grant of the terminal.
  • the PUSCH Physical Uplink Shared Channel
  • the PUSCH corresponds to an uplink shared channel (UL-SCH) of the MAC layer.
  • the uplink resource can transmit a minimum of 56 bits.
  • Msg3 The initial transmission of Msg3 is the only uplink transmission dynamically scheduled by the MAC layer, which requires MAC layer processing. Therefore, Msg3 and Msg2 are separated by at least 6 ms.
  • the retransmission of other Msg3 is performed by the PDCCH, and the PDCCH is transmitted in the common search space, and Scramble using TC-RNTI.
  • Msg3 contains different content:
  • the initial access carries the RRC connection request message generated by the RRC layer, and does not include a Non-Access Stratum (NAS) message; the logical channel corresponding to the MAC layer is a Common Control Channel (CCCH) transmission. ;
  • NAS Non-Access Stratum
  • CCCH Common Control Channel
  • Connection reestablishment carrying the RRC connection reestablishment request generated by the RRC layer, does not include the NAS message; the logical channel corresponding to the MAC layer is the CCCH;
  • the logical channel corresponding to the MAC layer is a dedicated control channel (Dedicate Control Channel, DCCH); the C-RNTI of the transmission terminal; if the resource is sufficient, the uplink buffer status report may be included (BSR);
  • DCCH Dedicate Control Channel
  • Uplink and downlink data arrival at least the C-RNTI of the transmission terminal.
  • the message is a downlink message, which is sent by the eNB and received by the terminal.
  • the eNB and the terminal complete the final contention resolution through Msg4.
  • the content of Msg4 is related to Msg3 The content corresponds.
  • MTC Machine Type Communication
  • LTE Long Term Evolution
  • M2M Machine to Machine
  • the MTC system has determined that the Physical Hybrid-ARQ Indicator Channel (PHICH) transmission is not supported.
  • PHICH Physical Hybrid-ARQ Indicator Channel
  • NACK Negative ACKnowledge
  • the embodiment of the present invention provides a random access method, device, and system, which are used to solve the ACK/NACK feedback by using an independent UL grant for each terminal Msg3. Big problem.
  • the terminal uses the RNTI dedicated to ACK/NACK feedback to detect a downlink control channel to obtain a downlink message for carrying ACK/NACK feedback corresponding to Msg3;
  • the terminal obtains ACK/NACK feedback of the terminal Msg3 from the downlink message according to the location of the ACK/NACK corresponding to the Msg3 of the terminal in the downlink message.
  • the terminal before the acquiring, by the terminal, the ACK/NACK feedback of the Msg3 of the terminal, the terminal further includes:
  • the terminal determines the location of the ACK/NACK corresponding to the Msg3 of the terminal in the downlink message.
  • the determining, by the terminal, the location of the ACK/NACK feedback corresponding to the Msg3 of the terminal in the downlink message includes:
  • the ACK/NACK feedback corresponding to the Msg3 of the different terminals is sorted in the downlink message in the same manner as the RAR corresponding to the terminal in the RAR message, and the RAR message is scrambled by the RA-RNTI.
  • the terminal determines the location of the ACK/NACK feedback corresponding to the Msg3 of the terminal in the downlink message, including:
  • the ratio of A before the location of each ACK/NACK feedback in the downlink message is the identification information of the preamble sequence of the terminal corresponding to the ACK/NACK feedback, and A is a natural number.
  • the terminal determines the location of the ACK/NACK feedback corresponding to the Msg3 of the terminal in the downlink message, including:
  • the terminal Determining, by the terminal, the Msg3 of the terminal according to at least one of the physical resource block PRB used by the terminal to transmit the Msg3, the narrowband information in which the Msg3 is transmitted, and the pilot cyclic shift information used to transmit the Msg3.
  • the corresponding ACK/NACK is fed back to the location in the downlink message.
  • the downlink control channel is an EPDCCH.
  • the downlink message is a DCI dedicated to transmitting ACK/NACK feedback, where the DCI includes M bit information, and the M bit information is divided into N information fields, and the N pieces Each information field in the information domain is used to carry an ACK/NACK feedback, where M and N are integers greater than or equal to 1.
  • the downlink control channel is transmitted in a common search space.
  • the correspondence between the RA-RNTI and the RNTI dedicated to the ACK/NACK feedback is predefined by the terminal and the base station, or is notified by the base station to the terminal by using a system message.
  • the method further includes:
  • the terminal If the ACK/NACK feedback of the Msg3 of the terminal is NACK, the terminal retransmits the Msg3 of the terminal according to the scheduling information indicated by the RAR grant grant corresponding to the terminal.
  • the base station maps the ACK/NACK feedback corresponding to the Msg3 of the at least two terminals to the downlink message;
  • the base station Determining, by the base station, that the RA-RNTI is corresponding to the corresponding relationship between the RA-RNTI corresponding to the at least two terminals and the RNTI dedicated to ACK/NACK feedback RNTI for ACK/NACK feedback;
  • the base station scrambles the downlink message by using the RNTI dedicated to ACK/NACK feedback, and sends the scrambled downlink message through the downlink control channel.
  • the base station mapping the ACK/NACK feedback corresponding to the Msg3 of the at least two terminals to the downlink message including:
  • the base station maps the ACK/NACK feedback corresponding to the Msg3 of the at least two terminals to the downlink message according to the location of the RAR corresponding to the at least two terminals in the RAR message;
  • the ACK/NACK feedback corresponding to the Msg3 of the different terminals is sorted in the downlink message in the same manner as the RAR corresponding to the terminal in the RAR message, and the RAR message is scrambled by the RA-RNTI.
  • the base station maps the ACK/NACK feedback corresponding to the Msg3 of the at least two terminals to the downlink message, including:
  • the base station maps the ACK/NACK feedback corresponding to the Msg3 of the at least two terminals to the downlink message according to the identifier information of the preamble sequence of the at least two terminals;
  • the A bit information before the location of each ACK/NACK feedback in the downlink message or the subsequent A bit information is the identification information of the preamble sequence of the terminal corresponding to the ACK/NACK feedback, and A is a natural number.
  • the base station mapping the ACK/NACK feedback corresponding to the Msg3 of the at least two terminals to the downlink message including:
  • the base station according to at least one of the PRB used by the at least two terminals to transmit the Msg3, the narrowband information in which the Msg3 is transmitted, and the pilot cyclic shift information used to transmit the Msg3, the at least two terminals
  • the ACK/NACK feedback corresponding to Msg3 is mapped to the downlink message.
  • the downlink control channel is an EPDCCH.
  • the downlink message is a DCI dedicated to transmitting ACK/NACK feedback, where the DCI includes M bit information, and the M bit information is divided into N information fields, and the N pieces Each information field in the information domain is used to carry an ACK/NACK feedback, where M and N are integers greater than or equal to 1.
  • the downlink control channel is transmitted in a common search space.
  • the correspondence between the RA-RNTI and the RNTI dedicated to the ACK/NACK feedback is predefined by the terminal and the base station, or is notified to the terminal by the base station through a system message.
  • the method further includes:
  • the base station re-receives the Msg3 retransmitted by the terminal with the ACK/NACK feedback as the NACK according to the scheduling information indicated by the RAR grant of the terminal whose ACK/NACK feedback is NACK.
  • a determining module configured to determine, according to a correspondence between the RA-RNTI and the RNTI dedicated to the ACK/NACK feedback, an RNTI dedicated to the ACK/NACK feedback corresponding to the RA-RNTI of the terminal to which the terminal belongs;
  • a downlink message obtaining module configured to detect, by using the RNTI dedicated to ACK/NACK feedback, a downlink control channel, to obtain a downlink message for carrying ACK/NACK feedback corresponding to Msg3;
  • the processing module is configured to obtain, according to the location of the ACK/NACK corresponding to the Msg3 of the terminal, the ACK/NACK feedback of the terminal Msg3 from the downlink message.
  • the processing module before the processing module acquires the ACK/NACK feedback of the terminal Msg3 from the downlink message, the processing module is further configured to:
  • the processing module is specifically configured to:
  • the ACK/NACK feedback corresponding to the Msg3 of the different terminals is sorted in the downlink message in the same manner as the RAR corresponding to the terminal in the RAR message, and the RAR message is scrambled by the RA-RNTI.
  • the processing module is specifically configured to:
  • the A bit information before the location of each ACK/NACK feedback in the downlink message or the subsequent A bit information is the identification information of the preamble sequence of the terminal corresponding to the ACK/NACK feedback, and A is a natural number.
  • the processing module is specifically configured to:
  • the downlink control channel is an EPDCCH.
  • the downlink message is a DCI dedicated to transmitting ACK/NACK feedback, where the DCI includes M bit information, and the M bit information is divided into N information fields, and the N pieces Each information field in the information domain is used to carry an ACK/NACK feedback, where M and N are integers greater than or equal to 1.
  • the downlink control channel is transmitted in a common search space.
  • the correspondence between the RA-RNTI and the RNTI dedicated to the ACK/NACK feedback is predefined by the terminal and the base station, or is notified by the base station to the terminal by using a system message.
  • the terminal further includes:
  • a retransmission module configured to retransmit the Msg3 of the terminal according to the scheduling information indicated by the RAR grant when the ACK/NACK feedback of the Msg3 of the terminal is NACK.
  • a receiving module configured to receive Msg3 sent by at least two terminals
  • a feedback information generating module configured to generate ACK/NACK feedback corresponding to the Msg3 of the at least two terminals
  • mapping module configured to map ACK/NACK feedback corresponding to the Msg3 of the at least two terminals into a downlink message
  • a determining module configured to determine, according to a correspondence between the RA-RNTI corresponding to the at least two terminals and an RNTI dedicated to ACK/NACK feedback, that the RA-RNTI is dedicated to RNTI for ACK/NACK feedback;
  • a sending module configured to scramble the downlink message by using the RNTI dedicated to ACK/NACK feedback, and send the scrambled downlink message by using a downlink control channel.
  • mapping module is specifically configured to:
  • the ACK/NACK feedback corresponding to the Msg3 of the different terminals is sorted in the downlink message in the same manner as the RAR corresponding to the terminal in the RAR message, and the RAR message is scrambled by the RA-RNTI.
  • mapping module is specifically configured to:
  • the A bit information before the location of each ACK/NACK feedback in the downlink message or the subsequent A bit information is the identification information of the preamble sequence of the terminal corresponding to the ACK/NACK feedback, and A is a natural number.
  • mapping module is specifically configured to:
  • Msg3 corresponding to the at least two terminals according to at least one of the PRB used by the at least two terminals to transmit the Msg3, the narrowband information in which the Msg3 is transmitted, and the pilot cyclic shift information used to transmit the Msg3
  • the ACK/NACK feedback is mapped into the downlink message.
  • the downlink control channel is an EPDCCH.
  • the downlink message is a DCI dedicated to transmitting ACK/NACK feedback, where the DCI includes M bit information, and the M bit information is divided into N information fields, and the N pieces Each information field in the information domain is used to carry an ACK/NACK feedback, where M and N are integers greater than or equal to 1.
  • the downlink control channel is transmitted in a common search space.
  • the correspondence between the RA-RNTI and the RNTI dedicated to the ACK/NACK feedback is predefined by the terminal and the base station, or is notified to the terminal by the base station through a system message.
  • the receiving module is further configured to:
  • the Msg3 retransmitted by the terminal whose ACK/NACK feedback is NACK is re-received according to the scheduling information indicated by the RAR grant of the terminal whose ACK/NACK feedback is NACK.
  • Another terminal provided by the embodiment of the present invention includes: a transceiver, and at least one processor connected to the transceiver, where:
  • the processor is configured to read a program in the memory and perform the following process:
  • the transceiver is configured to receive and transmit data under the control of the processor.
  • the processor obtains the ACK/NACK feedback of the terminal Msg3 from the downlink message.
  • the following process is also performed:
  • the determining, by the processor, the location of the ACK/NACK feedback corresponding to the Msg3 of the terminal in the downlink message includes:
  • the ACK/NACK feedback corresponding to the Msg3 of the different terminals is sorted in the downlink message in the same manner as the RAR corresponding to the terminal in the RAR message, and the RAR message is scrambled by the RA-RNTI.
  • the determining, by the processor, the location of the ACK/NACK feedback corresponding to the Msg3 of the terminal in the downlink message includes:
  • the A bit information before the location of each ACK/NACK feedback in the downlink message or the subsequent A bit information is the identification information of the preamble sequence of the terminal corresponding to the ACK/NACK feedback, and A is a natural number.
  • the determining, by the processor, the location of the ACK/NACK feedback corresponding to the Msg3 of the terminal in the downlink message includes:
  • the downlink control channel is an EPDCCH.
  • the downlink message is a DCI dedicated to transmitting ACK/NACK feedback, where the DCI includes M bit information, and the M bit information is divided into N information fields, and the N pieces Each information field in the information domain is used to carry an ACK/NACK feedback, where M and N are integers greater than or equal to 1.
  • the downlink control channel is transmitted in a common search space.
  • the correspondence between the RA-RNTI and the RNTI dedicated to the ACK/NACK feedback is predefined by the terminal and the base station, or is notified to the terminal by the base station through a system message.
  • the transceiver also performs the following processes:
  • the Msg3 of the terminal is retransmitted according to the scheduling information indicated by the RAR grant corresponding to the terminal.
  • Another base station provided by the embodiment of the present invention includes: a transceiver, and at least one processor connected to the transceiver, where:
  • a processor for reading a program in the memory performing the following process:
  • the processor specifically performs the following processes:
  • the ACK/NACK feedback corresponding to the Msg3 of the different terminals is sorted in the downlink message in the same manner as the RAR corresponding to the terminal in the RAR message, and the RAR message is scrambled by the RA-RNTI.
  • the processor specifically performs the following processes:
  • the A bit information before the location of each ACK/NACK feedback in the downlink message or the subsequent A bit information is the identification information of the preamble sequence of the terminal corresponding to the ACK/NACK feedback, and A is a natural number.
  • the processor specifically performs the following processes:
  • Msg3 corresponding to the at least two terminals according to at least one of the PRB used by the at least two terminals to transmit the Msg3, the narrowband information in which the Msg3 is transmitted, and the pilot cyclic shift information used to transmit the Msg3
  • the ACK/NACK feedback is mapped into the downlink message.
  • the downlink control channel is an EPDCCH.
  • the downlink message is a DCI dedicated to transmitting ACK/NACK feedback, where the DCI includes M bit information, and the M bit information is divided into N information fields, and the N pieces Each information field in the information domain is used to carry an ACK/NACK feedback, where M and N are integers greater than or equal to 1.
  • the downlink control channel is transmitted in a common search space.
  • the correspondence between the RA-RNTI and the RNTI dedicated to the ACK/NACK feedback is predefined by the terminal and the base station, or is notified to the terminal by the base station through a system message.
  • the transceiver also performs the following processes:
  • the Msg3 retransmitted by the terminal whose ACK/NACK feedback is NACK is re-received according to the scheduling information indicated by the RAR grant of the terminal whose ACK/NACK feedback is NACK.
  • a base station configured to receive Msg3 sent by at least two terminals, and generate ACK/NACK feedback corresponding to Msg3 of the at least two terminals; and map ACK/NACK feedback corresponding to Msg3 of the at least two terminals to a downlink message Determining an RNTI dedicated to ACK/NACK feedback corresponding to the RA-RNTI according to a correspondence between an RA-RNTI corresponding to the at least two terminals and an RNTI dedicated to ACK/NACK feedback; using the dedicated The RNTI fed back by the ACK/NACK scrambles the downlink message, and sends the scrambled downlink message through the downlink control channel;
  • a terminal configured to determine, according to a correspondence between the RA-RNTI and an RNTI dedicated to ACK/NACK feedback, an RNTI dedicated to ACK/NACK feedback corresponding to the RA-RNTI of the terminal; and using the dedicated ACK/NACK feedback
  • the RNTI detects the downlink control channel to obtain a downlink message for carrying the ACK/NACK feedback corresponding to the Msg3; and the location of the ACK/NACK corresponding to the Msg3 of the terminal in the downlink message, from the downlink message Obtaining ACK/NACK feedback of the terminal Msg3.
  • the embodiment of the present invention provides a scheme for transmitting an ACK/NACK feedback of a Msg3 of a downlink control channel for a downlink control channel dedicated to RN/NACK feedback ACK/NACK feedback corresponding to the RA-RNTI of the terminal, and implementing multiple The multicast of the ACK/NACK feedback of the terminal's Msg3 improves the feedback efficiency and saves system resources.
  • FIG. 2 is a schematic diagram of a method for random access on a terminal side according to an embodiment of the present disclosure
  • FIG. 3 is a schematic diagram of a mapping manner of RARs of different terminals in a downlink shared channel carrying RAR according to an embodiment of the present disclosure
  • FIG. 4 is a schematic diagram of mapping manners of ACK/NACK feedback corresponding to Msg3 of a first terminal in a downlink message according to an embodiment of the present disclosure
  • FIG. 5 is a schematic diagram of mapping manners of ACK/NACK feedback corresponding to Msg3 of a second terminal in a downlink message according to an embodiment of the present disclosure
  • FIG. 6 is a schematic diagram of a PRB used by a terminal to transmit Msg3 according to an embodiment of the present invention
  • FIG. 7 is a schematic diagram of mapping manners of ACK/NACK feedback corresponding to Msg3 of a third terminal in a downlink message according to an embodiment of the present disclosure
  • FIG. 8 is a schematic diagram of a method for random access on a terminal side according to an embodiment of the present disclosure.
  • FIG. 9 is a schematic diagram of a first terminal according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic diagram of a first type of base station according to an embodiment of the present disclosure.
  • FIG. 11 is a schematic diagram of a second terminal according to an embodiment of the present disclosure.
  • FIG. 12 is a schematic diagram of a second base station according to an embodiment of the present disclosure.
  • FIG. 13 is a schematic diagram of a communication system according to an embodiment of the present invention.
  • a random access method on the terminal side is provided in the embodiment of the present invention. As shown in FIG. 2, the method includes the following process:
  • the terminal determines, according to the correspondence between the RA-RNTI and the RNTI dedicated to the ACK/NACK feedback, the RNTI dedicated to the ACK/NACK feedback corresponding to the RA-RNTI of the terminal;
  • the terminal detects the downlink control channel by using the determined RNTI dedicated to ACK/NACK feedback, to obtain a downlink message for carrying the ACK/NACK feedback corresponding to the Msg3.
  • the terminal obtains ACK/NACK feedback of the terminal Msg3 from the downlink message according to the location of the ACK/NACK corresponding to the Msg3 of the terminal in the downlink message.
  • the terminal determines, according to the correspondence between the RA-RNTI and the RNTI dedicated to ACK/NACK feedback, that the RA-RNTI corresponding to the terminal is dedicated to ACK/NACK feedback.
  • RNTI using the determined RNTI dedicated to ACK/NACK feedback, detecting a downlink control channel to obtain a downlink message for carrying ACK/NACK feedback corresponding to Msg3; and ACK/NACK feedback corresponding to Msg3 of the terminal is in the downlink
  • the location in the message, the ACK/NACK feedback of the terminal's Msg3 is obtained from the downlink message.
  • the embodiment of the present invention provides a scheme for transmitting an ACK/NACK feedback of a Msg3 of a downlink control channel for a downlink control channel dedicated to RN/NACK feedback ACK/NACK feedback corresponding to the RA-RNTI of the terminal, and implementing multiple The multicast of the ACK/NACK feedback of the terminal's Msg3 improves the feedback efficiency and saves system resources.
  • the correspondence between the RA-RNTI and the RNTI dedicated to the ACK/NACK feedback is predefined by the terminal and the base station, or is notified to the terminal by the base station through a system message, such as by using a system information block (System Information Block, referred to as SIB) Notice.
  • SIB System Information Block
  • the embodiment of the present invention does not limit the specific implementation manner of the correspondence between the RA-RNTI and the RNTI dedicated to the ACK/NACK feedback, and the corresponding relationship may be implemented by using the correspondence relationship list shown in Table 1;
  • RA-RNTI AN-RNTI (RNTI dedicated to ACK/NACK feedback) RA-RNTI-1 AN-RNTI-1 RA-RNTI-2 AN-RNTI-2 RA-RNTI-3 AN-RNTI-3 RA-RNTI-4 AN-RNTI-4 RA-RNTI-5 AN-RNTI-5 RA-RNTI-6 AN-RNTI-6 RA-RNTI-7 AN-RNTI-7 RA-RNTI-8 RA-RNTI-9 AN-RNTI-9
  • AN-RNTI RA-RNTI+X
  • AN-RNTI represents an RNTI dedicated to ACK/NACK feedback
  • X represents an RA-RNTI offset value
  • the downlink control channel detected in S22 is an enhanced physical downlink control channel (Enhanced PDCCH, referred to as EPDCCH).
  • Enhanced PDCCH enhanced physical downlink control channel
  • the downlink control channel detected in S22 is transmitted in a common search space.
  • the downlink message obtained in S22 is Downlink Control Information (DCI) dedicated to transmitting ACK/NACK feedback, where the DCI includes M bit information, and the M bit information It is divided into N information fields, and each of the N information fields is used to carry one ACK/NACK feedback, where M and N are integers greater than or equal to 1.
  • DCI Downlink Control Information
  • the downlink message is always sent according to a fixed size, for example, always transmitted according to M bits, where M bits are divided into N regions, and each of the N regions is used to carry one ACK/NACK feedback.
  • the number of terminals that are RNTI scrambled and transmit RAR in the same physical downlink shared channel is the same. If the number of RARs transmitted is less than N, then the other areas in the N areas are set to 0 placeholders, indicating no information.
  • the terminal before the terminal obtains the ACK/NACK feedback of the Msg3 of the terminal from the downlink message, the terminal further includes:
  • the terminal determines the location of the ACK/NACK feedback corresponding to the Msg3 of the terminal in the downlink message.
  • the terminal determines that the ACK/NACK corresponding to the Msg3 of the terminal is in the downlink message.
  • the location in the middle includes the following three preferred implementations:
  • the terminal determines the location of the ACK/NACK feedback corresponding to the Msg3 of the terminal in the downlink message according to the location of the RAR of the terminal in the RAR message (hereinafter abbreviated as Msg2).
  • the ACK/NACK feedback corresponding to the Msg3 of the different terminals is sorted in the downlink message in the same manner as the RAR corresponding to the terminal in the Msg2, and the Msg2 is scrambled by the RA-RNTI of the terminal (that is, the PDSCH carrying the Msg2)
  • the scrambling initialization is determined by the RA-RNTI); in addition, the PDCCH/EPDCCH (ie, the PDCCH/EPDCCH carrying the Msg2 scheduling information, the scheduling information used to indicate the transmission resource and the transmission mode of the Msg2, etc.) of the Msg2 is also used.
  • -RNTI scrambling ie, the PDCCH/EPDCCH carrying the Msg2 scheduling information, the scheduling information used to indicate the transmission resource and the transmission mode of the Msg2, etc.
  • the mapping manner of the RARs of different terminals using the same PRACH time-frequency domain resources (that is, the determined RA-RNTIs are the same) in the RAR message of the RARs of multiple terminals carried by the physical downlink shared channel is as shown in FIG.
  • the RAR of the terminal 1 is in the first position, that is, the MAC RAR1 in FIG. 3, the RAR of the terminal 2 is in the second position, that is, the MAC RAR2 in FIG. 3, and the RAR of the terminal 3 is in the third position. That is, MAC RAR3 in FIG. 3, RAR ordering of other terminals, and so on.
  • the mapping manner of the ACK/NACK feedback corresponding to the Msg3 of the different terminal in the downlink message is the same as that of the RAR corresponding to the terminal in the Msg2, and the downlink message of the ACK/NACK feedback corresponding to the Msg3 of the different terminal is as shown in FIG. 4 It is shown that the ACK/NACK feedback corresponding to Msg3 of terminal 1 is at the first position, the ACK/NACK feedback corresponding to Msg3 of terminal 2 is at the second position, and the ACK/NACK feedback corresponding to Msg3 of terminal 3 is at the third position.
  • the ordering of ACK/NACK feedback corresponding to Msg3 of other terminals is similar.
  • the mode 2 determines, according to the identifier information of the preamble sequence of the terminal, the location of the ACK/NACK feedback corresponding to the Msg3 of the terminal in the downlink message.
  • the A bit information before the location of each ACK/NACK feedback in the downlink message or the subsequent A bit information is the identification information of the preamble sequence of the terminal corresponding to the ACK/NACK feedback, and A is a natural number.
  • the A bit information or the subsequent A bit information before the location of the ACK/NACK feedback of each terminal in the downlink message is an indication field, and the indication field is used to indicate the end.
  • Identification information of the preamble sequence of the terminal (such as the number, index, etc. of the preamble sequence), as shown in FIG. 5, the indication field of the A bit information before the ACK/NACK feedback corresponding to the Msg3 of the terminal 1 indicates the index of the preamble sequence of the terminal 1.
  • the indication field of the A bit information before the ACK/NACK feedback corresponding to the Msg3 of the terminal 2 indicates the index of the preamble sequence of the terminal 2, that is, the preamble index 2; the A before the ACK/NACK feedback corresponding to the Msg3 of the terminal 3
  • the indication field of the bit information indicates the index of the preamble sequence of the terminal 3, that is, the preamble index 3, the ACK/NACK feedback corresponding to the Msg3 of the other terminal, and the like.
  • Manner 3 The terminal determines, according to at least one of a physical resource block (PRB) used by the terminal to transmit Msg3, narrowband information in which Msg3 is transmitted, and pilot cyclic shift information used in transmitting Msg3. The location of the ACK/NACK corresponding to the Msg3 of the terminal in the downlink message.
  • PRB physical resource block
  • the order of the ACK/NACK feedback corresponding to the Msg3 of the different terminals in the downlink message is the order in which the numbers of the PRBs used by the different terminals to transmit the Msg3 are from large to small or from small to large. Since the downlink message of the ACK/NACK feedback corresponding to the Msg3 carrying the different terminals is defined according to all the narrowband positions in the system, which narrowband is used by the terminal to transmit its Msg3, the ACK/ corresponding to the Msg3 of the terminal is The NACK feedback is mapped to the corresponding location in the downlink message. The order of the ACK/NACK feedback corresponding to the Msg3 of the different terminals in the downlink message is the same as the order of the pilot cyclic shift information used by the different terminal to transmit the Msg3.
  • the PRBs used by the terminal 1 to the terminal 6 to transmit the Msg3 are the PRBs 1 to the PRBs in the same subband.
  • the terminal may also use the PRBs in different subbands, which is not limited in this embodiment of the present invention.
  • the base station maps the ACK/NACK feedback corresponding to the Msg3 of the terminal 1 to the terminal 6 in the downlink message according to the sequence of the PRB from small to large.
  • the ACK/NACK corresponding to the Msg3 of the terminal 1 of the PRB1 is used.
  • the ACK/NACK feedback corresponding to Msg3 of terminal 2 using PRB2 is in the second position, and the ACK/NACK feedback corresponding to Msg3 of terminal 3 using PRB3 is in the third position, and Msg3 corresponding to other terminals is corresponding.
  • the terminal after the terminal obtains the ACK/NACK feedback of the Msg3 of the terminal from the downlink message, the terminal further includes:
  • the terminal retransmits the Msg3 of the terminal according to the scheduling information indicated by the RAR grant corresponding to the terminal, where the RAR grant is carried in the RAR obtained by the terminal in the Msg2.
  • the UL grant, the scheduling information includes information such as a transmission resource location, a modulation and coding scheme, and the like.
  • the embodiment of the present invention further provides a random access method on the base station side.
  • the method for solving the problem corresponds to the random access method on the terminal side. Therefore, the implementation of the method can be found on the terminal side. The implementation of the method, the repetition will not be repeated.
  • a base station side random access method is provided in the embodiment of the present invention. As shown in FIG. 8, the method includes the following process:
  • the base station receives the Msg3 sent by the at least two terminals, and generates ACK/NACK feedback corresponding to the Msg3 of the at least two terminals.
  • the base station maps the ACK/NACK feedback corresponding to the Msg3 of the at least two terminals to the downlink message.
  • the base station determines, according to the correspondence between the RA-RNTI corresponding to the at least two terminals and the RNTI dedicated to the ACK/NACK feedback, that the RA-RNTI corresponding to the at least two terminals is dedicated to the ACK/NACK feedback.
  • the base station scrambles the downlink message by using the determined RNTI dedicated to ACK/NACK feedback, and sends the scrambled downlink message through the downlink control channel.
  • the embodiment of the present invention provides a scheme for transmitting an ACK/NACK feedback of a Msg3 of a downlink control channel for a downlink control channel dedicated to RN/NACK feedback ACK/NACK feedback corresponding to the RA-RNTI of the terminal, and implementing multiple The multicast of the ACK/NACK feedback of the terminal's Msg3 improves the feedback efficiency and saves system resources.
  • the correspondence between the RA-RNTI and the RNTI dedicated to the ACK/NACK feedback is predefined by the terminal and the base station, or is notified to the terminal by the base station through a system message.
  • the downlink control channel in S84 is an EPDCCH.
  • the downlink control channel in S84 is transmitted in a common search space.
  • the downlink messages in S82 and S84 are DCIs dedicated to transmitting ACK/NACK feedback, where the DCI includes M bit information, and the M bit information is divided into N information fields, and the N Each information field in each information domain is used to carry an ACK/NACK feedback, where M and N are integers greater than or equal to 1.
  • the S82 terminal base station maps the ACK/NACK feedback corresponding to the Msg3 of the at least two terminals into the downlink message, and includes the following three preferred implementation manners:
  • the first method corresponds to the foregoing method 1, and specifically:
  • the base station maps the ACK/NACK feedback corresponding to the Msg3 of the at least two terminals to the downlink message according to the location of the RAR corresponding to the at least two terminals in the Msg2;
  • the ACK/NACK feedback corresponding to the Msg3 of the different terminals is sorted in the downlink message in the same manner as the RAR corresponding to the terminal in the Msg2, and the Msg2 is scrambled by the RA-RNTI (that is, the scrambling initialization of the PDSCH carrying the Msg2)
  • the PDCCH/EPDCCH ie, the PDCCH/EPDCCH carrying the Msg2 scheduling information, the scheduling information used to indicate the transmission resource and the transmission mode of the Msg2, etc.
  • the Msg2 is also used to also use the RA-RNTI plus Disturb.
  • the second method corresponds to the foregoing method 2, and specifically:
  • the base station maps the ACK/NACK feedback corresponding to the Msg3 of the at least two terminals to the downlink message according to the identifier information of the preamble sequence of the at least two terminals;
  • the A bit information before the location of each ACK/NACK feedback in the downlink message or the subsequent A bit information is the identification information of the preamble sequence of the terminal corresponding to the ACK/NACK feedback, and A is a natural number.
  • the third method corresponds to the foregoing method 3, and specifically:
  • the base station corresponds to the Msg3 of the at least two terminals according to at least one of the PRB used by the at least two terminals to transmit the Msg3, the narrowband information in which the Msg3 is transmitted, and the pilot cyclic shift information used to transmit the Msg3.
  • the ACK/NACK feedback is mapped into the downlink message.
  • the method further includes:
  • the base station indicates according to the RAR grant of the terminal whose NACK is NACK corresponding to the ACK/NACK feedback.
  • Scheduling information, re-receiving Msg3 retransmitted by the ACK/NACK feedback NACK terminal, the RAR grant is the UL grant carried in the RAR of the terminal transmitted by the eNB in Msg2, and the scheduling information includes the transmission resource location, modulation and coding mode, and the like. information.
  • the base station maps the received ACK/NACK feedback corresponding to the Msg3 retransmitted by the terminal to the downlink message, where the last ACK/ corresponding to the Msg3
  • the ACK/NACK feedback corresponding to the ACK/NACK feedback of the terminal whose NACK feedback is ACK is set to 0 as the placeholder information.
  • the terminal is in the subframes n1 to n2 (including at least one subframe, whether the PRACH is repeatedly transmitted and the number of repeated transmissions is matched, and the concept of the following subframe interval is similar here), in the same PRACH time-frequency domain resource
  • the terminal 1 repeatedly transmits the preamble 1 (that is, the preamble sequence number is preamble 1), and the terminal 2 repeatedly transmits the preamble 2 (that is, the preamble sequence number is preamble 2).
  • the terminal 3 repeatedly transmits the preamble 3 (that is, the preamble sequence number is preamble 3).
  • the base station receives the preamble sequence on the corresponding PRACH time-frequency domain resource, and combines the preamble sequences in the multiple subframes to obtain the preamble1 sent by the terminal 1, the terminal 2, and the terminal 3 respectively.
  • RA-RNTI 1+t_id+10*f_id, where: t_id is the number of the first subframe corresponding to the specific PRACH resource, 0 ⁇ t_id ⁇ 10; f_id The number of a specific PRACH resource in a subframe is numbered in ascending order of frequency domain, 0 ⁇ f_id ⁇ 6, and the same RA-RNTI-1 is calculated; in the subframes n3 to n4, the base station passes through the downlink in the common search space.
  • the control channel repeatedly transmits a Downlink grant (DL grant) that is scrambled by the RA-RNTI-1, and in the subframes n5 to n6, according to the RA-RNTI-1
  • DL grant Downlink grant
  • the scheduling information in the downlink control channel is scrambled, and the RAR message carrying at least the terminals 1 and 2 and the terminal 3 is repeatedly transmitted on the downlink shared channel, and the mapping manner of the RAR of the different terminal in the downlink shared channel is performed.
  • DL grant Downlink grant
  • the terminal 1, the terminal 2, and the terminal 3 determine the RA-RNTI in the same manner as the above-mentioned base station; in the subframes n3 to n4, in the common search space, detect the downlink control channel scrambled by the RA-RNTI-1, and merge Obtaining the scheduling information carried by the downlink control channel according to the information in the multiple subframes, and receiving the RAR through the downlink shared channel in the subframes n5 to n6 according to the scheduling information, and combining the information in the multiple subframes to obtain the downlink shared channel.
  • the terminal 1 determines that its RAR is in the first position, that is, the MAC RAR1 in FIG.
  • the terminal 2 determines that its RAR is in the second position, that is, the MAC RAR2 in FIG. 3, and the terminal 3 determines that its RAR is in the third position, that is, the MAC RAR3 in FIG. 3, and the RAR order of other terminals and so on.
  • the terminal 1, the terminal 2, and the terminal 3 respectively repeat the transmission of the respective Msg3 in the subframes n7 to n8 according to the scheduling information of the UL grant carried in the respective RARs determined in the Msg2, for example, the terminal 1 is in the subband 1 PRB2 transmission, using Modulation and Coding Scheme (MCS) 1, terminal 2 transmission in PRB3 in subband 1, using MCS2, terminal 3 transmitting in PRB5 in subband 1, using MCS3, one of the subbands
  • MCS Modulation and Coding Scheme
  • the PRB in the middle is shown in Figure 6; the way of shifting in different sub-bands and using the same or different DMRS cyclic shifts is not excluded.
  • the base station also receives the Msg3 of each terminal in the subframes n7 to n8 according to the scheduling information of the UL grant corresponding to the terminal 1, the terminal 2, and the terminal 3, respectively, and obtains the final Msg3 message, and generates the Msg3 of each terminal.
  • ACK/NACK feedback mapped to a specific location in the DCI dedicated to transmitting ACK/NACK feedback in a specific order: for example, mapping ACK/NACK according to the order of each terminal RAR, as shown in FIG. 4, or as shown in FIG.
  • the ACK/NACK information of each terminal corresponds to an indication field, which is used to indicate the number of the preamble sequence of different terminals, or to be sequentially mapped according to the PRB number from small to large (also from large to small).
  • Different sub-bands The mapping may be performed in the same DCI, as shown in FIG. 7; the base station determines the RA-RNTI according to the correspondence between the RA-RNTI-1 and the RNTI (hereinafter referred to as AN-RNTI) dedicated to ACK/NACK feedback.
  • the base station in the subframes n9 to n10, the base station repeatedly transmits the downlink control channel scrambled by the AN-RNTI-1 in the common search space, and the downlink control channel carries the dedicated bearer for the bearer
  • the DCI of the ACK/NACK feedback corresponding to the Msg3 of the terminal.
  • the terminal 1, the terminal 2, and the terminal 3 determine the AN-RNTI-1 in the same manner as the base station side, and in the subframes n9 to n10, detect the downlink control using the AN-RNTI-1 scrambling in the common search space.
  • the channel combines the information in the multiple subframes to obtain the DCI carrying the ACK/NACK feedback, and determines the specific location of the feedback information in the DCI according to the method consistent with the ACK/NACK feedback of the base station side mapping; further determining whether the feedback information is based on the feedback information Retransmission, if it is ACK, Msg3 accepts correctly and does not need to retransmit. Otherwise, in subframes n11 ⁇ n12, the Msg3 (ie, non-adaptive retransmission) is retransmitted according to the scheduling information of the first Msg3 transmission.
  • the feedback information of the terminal 1 is ACK
  • the feedback of the terminal 2 and the terminal 3 is NACK
  • the terminal 2 and the terminal 3 need to retransmit the Msg3; the base station repeats the steps in the above 2) to receive the Msg3 of the terminal 2 and the terminal 3.
  • the information is transmitted, and ACK/NACK feedback is generated, and is mapped to the DCI in the same manner, that is, the mapping position of the ACK/NACK feedback of the terminal 2 and the terminal 3 in the DCI does not change.
  • the ACK/NACK feedback of the corresponding terminal 1 in the DCI can be set to 0 as the placeholder information; correspondingly, on the terminal side, the terminal 1 no longer needs to listen to the downlink control channel scrambled by the AN-RNTI-1, Terminal 2 and terminal 3 also need to obtain the ACK/NACK feedback of their Msg3 retransmission according to the same steps in 3) above, and so on, until the Msg3 transmission is correct or the maximum number of retransmissions of Msg3 is reached.
  • the above method processing flow can be implemented by a software program, which can be stored in a storage medium, and when the stored software program is called, the above method steps are performed.
  • a terminal is provided in the embodiment of the present invention.
  • the principle of solving the problem is similar to the random access method on the terminal side shown in FIG. 2, so the implementation of the terminal can be seen in the figure.
  • the implementation of the method shown in 2 will not be repeated here.
  • a terminal provided by the embodiment of the present invention, as shown in FIG. 9, the terminal includes:
  • the determining module 91 is configured to determine, according to the correspondence between the RA-RNTI and the RNTI dedicated to the ACK/NACK feedback, the RNTI dedicated to the ACK/NACK feedback corresponding to the RA-RNTI of the terminal to which the UE belongs.
  • the downlink message obtaining module 92 is configured to detect the downlink control channel by using the RNTI dedicated to ACK/NACK feedback to obtain a downlink message for carrying the ACK/NACK feedback corresponding to the Msg3.
  • the processing module 93 is configured to obtain ACK/NACK feedback of the terminal Msg3 from the downlink message according to the location of the ACK/NACK corresponding to the Msg3 of the terminal in the downlink message.
  • the processing module 93 before the processing module 93 obtains the ACK/NACK feedback of the terminal Msg3 from the downlink message, the processing module 93 is further configured to:
  • the processing module 93 is specifically configured to:
  • the ACK/NACK feedback corresponding to the Msg3 of the different terminals is sorted in the downlink message in the same manner as the RAR corresponding to the terminal in the RAR message, and the RAR message is scrambled by the RA-RNTI.
  • the processing module 93 is specifically configured to:
  • the A bit information before the location of each ACK/NACK feedback in the downlink message or the subsequent A bit information is the identification information of the preamble sequence of the terminal corresponding to the ACK/NACK feedback, and A is a natural number.
  • the processing module 93 is specifically configured to:
  • the downlink control channel is an EPDCCH.
  • the downlink message is a DCI dedicated to transmitting ACK/NACK feedback, where the DCI includes M bit information, and the M bit information is divided into N information fields, and the N pieces Each information field in the information domain is used to carry an ACK/NACK feedback, where M and N are integers greater than or equal to 1.
  • the downlink control channel is transmitted in a common search space.
  • the correspondence between the RA-RNTI and the RNTI dedicated to the ACK/NACK feedback is predefined by the terminal and the base station, or is notified to the terminal by the base station through a system message.
  • the terminal further includes:
  • a retransmission module (not shown in the figure), configured to retransmit the Msg3 of the terminal according to scheduling information indicated by the RAR grant corresponding to the terminal when the ACK/NACK feedback of the Msg3 of the terminal is NACK .
  • a base station is further provided in the embodiment of the present invention.
  • the principle of the base station solving the problem is similar to the random access method on the base station side shown in FIG. 8 above. Therefore, the implementation of the base station can be seen in the figure. The implementation of the method shown in Fig. 8 will not be repeated here.
  • the receiving module 101 is configured to receive Msg3 sent by at least two terminals;
  • the feedback information generating module 102 is configured to generate ACK/NACK feedback corresponding to the Msg3 of the at least two terminals;
  • the mapping module 103 is configured to map the ACK/NACK feedback corresponding to the Msg3 of the at least two terminals into the downlink message;
  • the determining module 104 is configured to determine, according to the correspondence between the RA-RNTI corresponding to the at least two terminals and the RNTI dedicated to the ACK/NACK feedback, the RNTI dedicated to the ACK/NACK feedback corresponding to the RA-RNTI;
  • a sending module 105 configured to use the RNTI dedicated to ACK/NACK feedback
  • the line message is scrambled, and the scrambled downlink message is sent through the downlink control channel.
  • mapping module 103 is specifically configured to:
  • the ACK/NACK feedback corresponding to the Msg3 of the different terminals is sorted in the downlink message in the same manner as the RAR corresponding to the terminal in the RAR message, and the RAR message is scrambled by the RA-RNTI.
  • mapping module 103 is specifically configured to:
  • the A bit information before the location of each ACK/NACK feedback in the downlink message or the subsequent A bit information is the identification information of the preamble sequence of the terminal corresponding to the ACK/NACK feedback, and A is a natural number.
  • mapping module 103 is specifically configured to:
  • Msg3 corresponding to the at least two terminals according to at least one of the PRB used by the at least two terminals to transmit the Msg3, the narrowband information in which the Msg3 is transmitted, and the pilot cyclic shift information used to transmit the Msg3
  • the ACK/NACK feedback is mapped into the downlink message.
  • the downlink control channel is an EPDCCH.
  • the downlink message is a DCI dedicated to transmitting ACK/NACK feedback, where the DCI includes M bit information, and the M bit information is divided into N information fields, and the N pieces Each information field in the information domain is used to carry an ACK/NACK feedback, where M and N are integers greater than or equal to 1.
  • the downlink control channel is transmitted in a common search space.
  • the correspondence between the RA-RNTI and the RNTI dedicated to the ACK/NACK feedback is predefined by the terminal and the base station, or is notified to the terminal by the base station through a system message.
  • the receiving module 101 is further configured to:
  • the terminal provided by the embodiment of the present invention includes a transceiver 111 and at least one processor 112 connected to the transceiver 111, where:
  • the processor 112 is configured to read a program in the memory 113 and perform the following process:
  • the transceiver 111 is configured to receive and transmit data under the control of the processor 112.
  • bus 110 may include any number of interconnected buses and bridges, and bus 110 will include one or more processors and memory 113 represented by general purpose processor 112. The various circuits of the memory are linked together.
  • the bus 110 can also link various other circuits, such as peripherals, voltage regulators, and power management circuits, as is known in the art, and therefore, will not be further described herein.
  • Bus interface 114 provides an interface between bus 110 and transceiver 111.
  • the transceiver 111 can be an element or a plurality of elements, such as a plurality of receivers and transmitters, providing means for communicating with various other devices on a transmission medium. For example, the transceiver 111 receives external data from other devices.
  • the transceiver 111 is configured to transmit the processed data of the processor 112 to other devices.
  • a user interface 115 can also be provided, such as a keypad, display, speaker, microphone, joystick.
  • the processor 112 is responsible for managing the bus 110 and the usual processing, running a general purpose operating system as described above.
  • the memory 113 can be used to store data used by the processor 112 when performing operations.
  • the processor 112 may be a central processing unit (CPU) or an application specific integrated circuit (ASIC). Field Programmable Gate Array (FPGA), or Complex Programmable Logic Device (CPLD).
  • CPU central processing unit
  • ASIC application specific integrated circuit
  • FPGA Field Programmable Gate Array
  • CPLD Complex Programmable Logic Device
  • the processor 112 obtains the ACK/NACK feedback of the terminal Msg3 from the downlink message.
  • the following process is also performed:
  • the determining, by the processor 112, the location of the ACK/NACK feedback corresponding to the Msg3 of the terminal in the downlink message includes:
  • the ACK/NACK feedback corresponding to the Msg3 of the different terminals is sorted in the downlink message in the same manner as the RAR corresponding to the terminal in the RAR message, and the RAR message is scrambled by the RA-RNTI.
  • the determining, by the processor 112, the location of the ACK/NACK feedback corresponding to the Msg3 of the terminal in the downlink message includes:
  • the A bit information before the location of each ACK/NACK feedback in the downlink message or the subsequent A bit information is the identification information of the preamble sequence of the terminal corresponding to the ACK/NACK feedback, and A is a natural number.
  • the determining, by the processor 112, the location of the ACK/NACK feedback corresponding to the Msg3 of the terminal in the downlink message includes:
  • the downlink control channel is an EPDCCH.
  • the downlink message is a DCI dedicated to transmitting ACK/NACK feedback.
  • the DCI includes M bit information, and the M bit information is divided into N information fields, and each of the N information fields is used to carry an ACK/NACK feedback, where M And N are integers greater than or equal to 1.
  • the downlink control channel is transmitted in a common search space.
  • the correspondence between the RA-RNTI and the RNTI dedicated to the ACK/NACK feedback is predefined by the terminal and the base station, or is notified to the terminal by the base station through a system message.
  • the transceiver 111 also performs the following processes:
  • the Msg3 of the terminal is retransmitted according to the scheduling information indicated by the RAR grant corresponding to the terminal.
  • a base station provided by an embodiment of the present invention includes a transceiver 121 and at least one processor 122 connected to the transceiver 121, where:
  • the processor 122 is configured to read a program in the memory 123 and perform the following process:
  • bus 120 may include any number of interconnected buses and bridges, and bus 120 will include one or more processors represented by processor 122 and memory represented by memory 123.
  • the various circuits are linked together.
  • the bus 120 can also link various other circuits, such as peripherals, voltage regulators, and power management circuits, as is known in the art, and therefore, will not be further described herein.
  • Bus interface 124 provides an interface between bus 120 and transceiver 121.
  • the transceiver 121 can be a component or Thus, a plurality of components, such as a plurality of receivers and transmitters, provide means for communicating with various other devices on a transmission medium.
  • Data processed by processor 122 is transmitted over wireless medium via antenna 125. Further, antenna 125 also receives the data and transmits the data to processor 122.
  • the processor 122 is responsible for managing the bus 120 and the usual processing, and can also provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions.
  • the memory 123 can be used to store data used by the processor 122 when performing operations.
  • the processor 122 can be a CPU, an ASIC, an FPGA, or a CPLD.
  • the processor 122 specifically performs the following processes:
  • the ACK/NACK feedback corresponding to the Msg3 of the different terminals is sorted in the downlink message in the same manner as the RAR corresponding to the terminal in the RAR message, and the RAR message is scrambled by the RA-RNTI.
  • the processor 122 specifically performs the following processes:
  • the A bit information before the location of each ACK/NACK feedback in the downlink message or the subsequent A bit information is the identification information of the preamble sequence of the terminal corresponding to the ACK/NACK feedback, and A is a natural number.
  • the processor 122 specifically performs the following processes:
  • Msg3 corresponding to the at least two terminals according to at least one of the PRB used by the at least two terminals to transmit the Msg3, the narrowband information in which the Msg3 is transmitted, and the pilot cyclic shift information used to transmit the Msg3
  • the ACK/NACK feedback is mapped into the downlink message.
  • the downlink control channel is an EPDCCH.
  • the downlink message is a DCI dedicated to transmitting ACK/NACK feedback, where the DCI includes M bit information, and the M bit information is divided into N pieces of information. Each of the N information fields is used to carry an ACK/NACK feedback, where M and N are integers greater than or equal to 1.
  • the downlink control channel is transmitted in a common search space.
  • the correspondence between the RA-RNTI and the RNTI dedicated to the ACK/NACK feedback is predefined by the terminal and the base station, or is notified to the terminal by the base station through a system message.
  • the transceiver 121 also performs the following processes:
  • the Msg3 retransmitted by the terminal whose ACK/NACK feedback is NACK is re-received according to the scheduling information indicated by the RAR grant of the terminal whose ACK/NACK feedback is NACK.
  • an embodiment of the present invention further provides a communication system. As shown in FIG. 13, the system includes:
  • the base station 131 is configured to receive the Msg3 sent by the at least two terminals, and generate ACK/NACK feedback corresponding to the Msg3 of the at least two terminals, and map the ACK/NACK feedback corresponding to the Msg3 of the at least two terminals to the downlink. And determining, according to the correspondence between the RA-RNTI corresponding to the at least two terminals and the RNTI dedicated to the ACK/NACK feedback, the RNTI dedicated to the ACK/NACK feedback corresponding to the RA-RNTI; The RNTI dedicated to the ACK/NACK feedback scrambles the downlink message, and sends the scrambled downlink message through the downlink control channel;
  • the terminal 132 is configured to determine, according to the correspondence between the RA-RNTI and the RNTI dedicated to the ACK/NACK feedback, the RNTI dedicated to the ACK/NACK feedback corresponding to the RA-RNTI of the terminal; and use the dedicated ACK/NACK
  • the RNTI of the feedback detects the downlink control channel to obtain a downlink message for carrying the ACK/NACK feedback corresponding to the Msg3; and the position of the ACK/NACK corresponding to the Msg3 of the terminal in the downlink message, from the downlink Obtaining ACK/NACK feedback of the terminal's Msg3 in the message.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the present invention may employ computer-usable storage media (including but not limited to disks) in one or more of the computer-usable program code embodied therein. The form of a computer program product implemented on a memory, CD-ROM, optical memory, or the like.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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

Abstract

L'invention concerne un procédé, un dispositif, et un système d'accès aléatoire, utilisés pour résoudre le problème lié, dans le contexte d'amélioration de la couverture, au fait que l'emploi d'une autorisation UL indépendante sur le Msg3 de chaque terminal pour exécuter une rétroaction ACK/NACK entraîne un surdébit de rétroaction important. Le procédé comprend les étapes suivantes : selon une corrélation entre un RA-RNTI et un RNTI utilisé spécifiquement pour un ACK/NACK, un terminal détermine un RNTI correspondant au RA-RNTI du terminal, utilisé spécifiquement pour une rétroaction ACK/NACK ; il utilise le RNTI utilisé spécifiquement pour la rétroaction ACK/NACK afin de détecter un canal de commande de liaison descendante, de sorte à obtenir un message de liaison descendante utilisé pour transporter la rétroaction ACK/NACK correspondant au Msg 3 ; selon l'emplacement, dans le message de liaison descendante, de la rétroaction ACK/NACK correspondant au Msg3 du terminal, il obtient la rétroaction ACK/NACK du Msg3 dudit terminal, à partir du message de liaison descendante, ce qui permet d'économiser des ressources système.
PCT/CN2016/089421 2015-08-11 2016-07-08 Procédé, dispositif, et système d'accès aléatoire WO2017024912A1 (fr)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019158096A1 (fr) * 2018-02-14 2019-08-22 华为技术有限公司 Procédé et dispositif de transmission de données lors d'un accès aléatoire
CN110536424A (zh) * 2018-08-09 2019-12-03 中兴通讯股份有限公司 一种数据传输方法、基站及终端
CN110546905A (zh) * 2017-04-28 2019-12-06 摩托罗拉移动有限责任公司 用于一个或者多个过程的反馈消息传输
CN114257274A (zh) * 2020-09-21 2022-03-29 上海朗帛通信技术有限公司 一种被用于无线通信的节点中的方法和装置
CN114287166A (zh) * 2021-12-06 2022-04-05 北京小米移动软件有限公司 一种基于四步随机接入的第三条消息重复的覆盖增强方法
US11405891B2 (en) * 2018-01-12 2022-08-02 Zte Corporation Data transmission method and apparatus, terminal, and base station
US11438923B2 (en) 2018-02-14 2022-09-06 Huawei Technologies Co., Ltd. Method and apparatus for transmitting data in random access process

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107370574A (zh) * 2016-05-12 2017-11-21 株式会社Ntt都科摩 针对上行数据传输的反馈方法及装置
CN108512626B (zh) * 2017-02-24 2020-04-17 中国移动通信有限公司研究院 一种信息传输方法、用户设备及基站
CN108633100B (zh) * 2017-03-24 2023-10-20 华为技术有限公司 随机接入响应的方法和设备以及随机接入的方法和设备
CN111684859A (zh) * 2018-02-12 2020-09-18 华为技术有限公司 一种数据传输的方法以及通信设备
WO2019191861A1 (fr) * 2018-04-02 2019-10-10 Qualcomm Incorporated Transmission en parallèle de séquences de préambule avec des couches de données pour une meilleure détection des données
CN110475371B (zh) 2018-05-09 2023-10-27 夏普株式会社 用户设备执行的方法、用户设备和基站
CN111726884B (zh) * 2019-03-20 2022-06-07 中国移动通信有限公司研究院 一种指示方法及设备
CN113812191B (zh) * 2019-09-30 2024-05-24 Oppo广东移动通信有限公司 发送或接收反馈信息的方法和装置
JP2023518655A (ja) * 2020-02-07 2023-05-08 オッポ広東移動通信有限公司 情報処理方法及び装置
CN114258149B (zh) * 2020-09-24 2024-02-02 上海华为技术有限公司 一种接入方法以及相关设备
CN112804706B (zh) * 2020-12-31 2022-07-26 联想未来通信科技(重庆)有限公司 一种通信链路检测方法及装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102300331A (zh) * 2011-08-19 2011-12-28 电信科学技术研究院 数据传输方法和设备
CN102325382A (zh) * 2011-06-30 2012-01-18 电信科学技术研究院 随机接入方法和设备
WO2013088383A2 (fr) * 2011-12-16 2013-06-20 Renesas Mobile Corporation Procédé et appareil de mappage à une ressource de liaison montante
WO2015012666A1 (fr) * 2013-07-26 2015-01-29 엘지전자 주식회사 Procédé d'émission d'un signal pour mtc et appareil à cet effet

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2860218C (fr) * 2011-12-23 2022-08-02 Blackberry Limited Methode mise en oeuvre dans un equipement utilisateur pour systeme sans fil
CN103220811B (zh) * 2012-01-19 2018-04-27 中兴通讯股份有限公司 信息处理方法、mtc ue随机接入lte系统的方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102325382A (zh) * 2011-06-30 2012-01-18 电信科学技术研究院 随机接入方法和设备
CN102300331A (zh) * 2011-08-19 2011-12-28 电信科学技术研究院 数据传输方法和设备
WO2013088383A2 (fr) * 2011-12-16 2013-06-20 Renesas Mobile Corporation Procédé et appareil de mappage à une ressource de liaison montante
WO2015012666A1 (fr) * 2013-07-26 2015-01-29 엘지전자 주식회사 Procédé d'émission d'un signal pour mtc et appareil à cet effet

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110546905A (zh) * 2017-04-28 2019-12-06 摩托罗拉移动有限责任公司 用于一个或者多个过程的反馈消息传输
CN110546905B (zh) * 2017-04-28 2023-01-13 摩托罗拉移动有限责任公司 用于一个或者多个过程的反馈消息传输
US11405891B2 (en) * 2018-01-12 2022-08-02 Zte Corporation Data transmission method and apparatus, terminal, and base station
WO2019158096A1 (fr) * 2018-02-14 2019-08-22 华为技术有限公司 Procédé et dispositif de transmission de données lors d'un accès aléatoire
US11438923B2 (en) 2018-02-14 2022-09-06 Huawei Technologies Co., Ltd. Method and apparatus for transmitting data in random access process
CN110536424A (zh) * 2018-08-09 2019-12-03 中兴通讯股份有限公司 一种数据传输方法、基站及终端
CN114257274A (zh) * 2020-09-21 2022-03-29 上海朗帛通信技术有限公司 一种被用于无线通信的节点中的方法和装置
CN114257274B (zh) * 2020-09-21 2023-02-17 上海朗帛通信技术有限公司 一种被用于无线通信的节点中的方法和装置
CN114287166A (zh) * 2021-12-06 2022-04-05 北京小米移动软件有限公司 一种基于四步随机接入的第三条消息重复的覆盖增强方法
CN114287166B (zh) * 2021-12-06 2024-04-05 北京小米移动软件有限公司 一种基于四步随机接入的第三条消息重复的覆盖增强方法

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