WO2016184275A1 - Procédé d'émission, procédé de réception, appareil d'émission et appareil de réception pour données de liaison descendante - Google Patents

Procédé d'émission, procédé de réception, appareil d'émission et appareil de réception pour données de liaison descendante Download PDF

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Publication number
WO2016184275A1
WO2016184275A1 PCT/CN2016/079094 CN2016079094W WO2016184275A1 WO 2016184275 A1 WO2016184275 A1 WO 2016184275A1 CN 2016079094 W CN2016079094 W CN 2016079094W WO 2016184275 A1 WO2016184275 A1 WO 2016184275A1
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WIPO (PCT)
Prior art keywords
information
preamble
terminal
message
base station
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PCT/CN2016/079094
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English (en)
Chinese (zh)
Inventor
石靖
夏树强
戴谦
戴博
张雯
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中兴通讯股份有限公司
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Publication of WO2016184275A1 publication Critical patent/WO2016184275A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • 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
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1896—ARQ related signaling
    • 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

Definitions

  • the present invention relates to the field of communications, and in particular to a method, a receiving method, a transmitting device, and a receiving device for transmitting downlink data.
  • next-generation mobile communication technology Long-Term Evolution (LTE)/Long-Term Evolution Advance (LTE-Advance/LTE) -A
  • LTE Long-Term Evolution
  • LTE-Advance/LTE Long-Term Evolution Advance
  • 5G 5th Generation mobile communication technology
  • ultra-high speed ultra-high capacity
  • ultra-high reliability ultra-high reliability
  • ultra-low-latency transmission characteristics For the ultra-low latency index in 5G systems, it is currently recognized that the air interface delay is on the order of 1 ms.
  • the LTE downlink data transmission first needs to establish a Radio Resource Control (RRC) connection from the idle (IDLE) state.
  • RRC Radio Resource Control
  • the Base Transitiver Station BTS, or ENB, or E-UTRAN NodeB
  • UE User Equipment
  • CRS cell-specific reference signal
  • CQI channel quality indicator
  • the ENB allocates downlink resources, wherein the ENB adaptively allocates downlink resources according to the quality of the downlink channel.
  • the ENB dynamically allocates resources and code modulation modes to the UE in each subframe. Then, the ENB transmits data on the Physical Downlink Shared Channel (PDSCH), and fills the data on the PDSCH according to the result of the resource allocation, and transmits the data on the Physical Downlink Control Channel (PDCCH). Corresponding scheduling control information so that the UE can receive the demodulated PDSCH. Whether the feedback is correct after the UE receives the PDSCH, and the acknowledgement or negative acknowledgement (ACK/NACK) is fed back through the Physical Uplink Control Channel (PUCCH). If there is a data transmission error afterwards, that is, the feedback is NACK, the UE also needs to retransmit the data. At the same time, the above feedback is implemented after uplink synchronization. It can be seen that the steps of the downlink data transmission process in the related art are cumbersome, and it is difficult to ensure the requirement of ultra-low delay transmission characteristics in the future 5G system.
  • the present invention provides a method for transmitting downlink data, a receiving method, a transmitting device, and a receiving device, so as to solve at least the problem that the downlink scheduling method existing in the related art has a complicated process and a large delay.
  • a method for transmitting downlink data including: when a base station needs to send a downlink service, the base station directly sends a fast message that carries downlink data information.
  • the downlink data information includes at least one of the following: a unicast service, a multicast service, and a broadcast service;
  • the fast message includes at least one of the following: a specific fast message that is scrambled by the private wireless network temporary identifier RNTI a paging message, a broadcast message, wherein, when the downlink data information includes the unicast service, the fast message further includes at least a feedback indication that is used by the terminal to feed back downlink data information in the fast message. information.
  • the sending, by the base station, the fast message carrying the downlink data information includes: sending a fast message carrying downlink data information of one or more users;
  • the sending, by the base station, the fast message carrying the downlink data information includes: sending a fast message carrying one or more multicast services and/or broadcast services.
  • the fast message when the downlink data information includes the unicast service, where the fast message includes the specific fast message or broadcast message that is scrambled by the private wireless network temporary identifier RNTI, the fast message further carries There is terminal identification information corresponding to the downlink data information.
  • the feedback indication information includes: indication information indicating a sequence of feedback acknowledgement ACK information or negative acknowledgement NACK information for the unicast service carried in the fast message, and/or for configuring feedback Configuration information of a sequence of ACK messages or negative acknowledgment NACK messages.
  • the method further includes: the base station receiving the ACK information or NACK information that is sent by the terminal; and the base station receiving an uplink fast transmission message that is sent by the terminal, where And transmitting, by the terminal, the sequence of the uplink fast transmission message immediately following the ACK information or the NACK information in the time domain.
  • the ACK information or the NACK information corresponds to a preamble configured by a base station, and the indication information and/or configuration information includes random access channel configuration information.
  • the feedback indication information includes configuration information of the preamble corresponding to the indicated ACK information and configuration information of the preamble corresponding to the indicated NACK information;
  • the base station determines When the terminal receives and demodulates the ACK information when the unicast service carried in the fast message is correct, and the terminal receives and demodulates the unicast service error carried in the fast message without feedback information,
  • the feedback indication information includes configuration information of the preamble corresponding to the indicated ACK information; when the base station determines that the terminal receives and demodulates the unicast service carried in the fast message is correct, the information is not fed back, and
  • the feedback indication information includes the
  • the base station separately provides a preamble for the same terminal to feed back the ACK information and the NACK information, and feeds back the preamble configured by the ACK information and the feedback of the same terminal for the same terminal.
  • the root sequence of the preamble of the NACK information configuration is the same and/or the cyclic shift step is the same.
  • the preamble corresponding to the ACK information or the NACK information is a preamble that is determined by the base station according to a root sequence of the finite set and/or a cyclic shift type of the finite set.
  • the time domain length of the preamble configured by the base station is less than or equal to one subframe length, where, when the time domain length of the preamble configured by the base station is less than one subframe length,
  • the feedback indication information further includes indication information for indicating an Orthogonal Frequency Division Multiplexing OFDM symbol position used in the subframe, where the OFDM symbol position used is an OFDM symbol in which the preamble configured by the base station is located position.
  • the preamble configured by the base station can be used or not used for the uplink random access of the terminal, where the preamble that can be used for the uplink random access of the terminal is not applicable to the The preamble of the terminal performing uplink random access is different.
  • the method further includes: the base station receiving the preamble fed back by the terminal; and the preamble fed back by the terminal has the capability of feeding back the ACK information or the NACK information, and
  • the base station sends a random access response RAR message to the terminal; when the preamble fed back by the terminal only has feedback ACK information or NACK information When the capability is enabled, the base station does not send a random access response RAR message.
  • the base station further includes: when the at least one of the following conditions is met, the base station stops sending The fast message: the base station receives the acknowledgement ACK information fed back by the terminal; the waiting time after the base station sends the fast message exceeds a predetermined threshold.
  • a method for receiving downlink data including: receiving, by a terminal, a fast message that is directly sent by a base station and carries downlink data information.
  • the downlink data information includes at least one of the following: a unicast service, a multicast service, and a broadcast service;
  • the fast message includes at least one of the following: a specific fast message that is scrambled by the private wireless network temporary identifier RNTI And the paging message, the broadcast message, wherein, when the downlink data information includes the unicast service, the fast message further includes at least the terminal for feeding back the downlink data information in the fast message. Feedback instructions.
  • the feedback indication information includes: indication information for indicating, by the terminal, a sequence of positive acknowledgment ACK information or negative acknowledgment NACK information for the unicast service carried in the fast message, and/or configured for The terminal feeds back configuration information of a sequence of positive acknowledgement ACK information or negative acknowledgement NACK information to the unicast service carried in the fast message.
  • the terminal after receiving the fast message that is sent by the base station and carrying the downlink data information, the terminal further includes: the terminal feeding back the ACK information or the NACK information to the base station; The sequence of the ACK information or the NACK information is then transmitted to transmit an uplink fast transmission message.
  • the ACK information or the NACK information corresponds to a preamble configured by the base station, and the indication information and/or configuration information includes random access channel configuration information.
  • the ACK information is fed back when the terminal receives and demodulates the unicast service carried in the fast message, or the unicast service error carried in the fast message is received and demodulated.
  • the feedback indication information includes configuration information of the preamble corresponding to the indicated ACK information and configuration information of the preamble corresponding to the indicated NACK information; when the terminal receives and demodulates the fast message
  • the feedback indication information includes the indicated ACK information.
  • the feedback indication information includes configuration information of the preamble corresponding to the indicated NACK information.
  • the preamble corresponding to the ACK information and the preamble corresponding to the NACK information are preambles respectively configured by the base station, and the preamble corresponding to the ACK information and the preamble corresponding to the NACK information
  • the root sequences are the same and/or the cyclic shift steps are the same.
  • the preamble corresponding to the ACK information or the NACK information is a preamble determined by the base station according to a root sequence of a finite set and/or a cyclic shift type of a finite set.
  • the time domain length of the preamble corresponding to the ACK information or the NACK information is less than or equal to one subframe length; where, the time domain length of the preamble corresponding to the ACK information or the NACK information is less than one subframe length
  • the feedback indication information further includes indication information for indicating an Orthogonal Frequency Division Multiplexing OFDM symbol position used in the subframe, where the OFDM symbol position used is the preamble configured by the base station The location of the OFDM symbol.
  • the preamble corresponding to the ACK information or the NACK information can be used or not used for uplink random access by the terminal, where the preamble and the uplink that can be used for the uplink random access of the terminal are The preambles for the uplink random access of the terminal are different.
  • the terminal after receiving the fast message that is sent by the base station and carrying the downlink data information, the terminal further includes: the terminal sending a preamble to the base station; and the preamble sent by the terminal has a feedback ACK The capability of the information or the NACK information, and when the preamble fed back by the terminal has the capability of performing uplink random access, the terminal receives the random access response RAR message sent by the base station.
  • a device for transmitting downlink data where the device is located at a base station side, and includes: a sending module, configured to directly send a fast message carrying downlink data information when a downlink service needs to be sent.
  • the downlink data information includes at least one of the following: a unicast service, a multicast service, and a broadcast service;
  • the fast message includes at least one of the following: a specific fast message that is scrambled by the private wireless network temporary identifier RNTI a paging message, a broadcast message, wherein, when the downlink data information includes the unicast service, the fast message further includes at least a feedback indication that is used by the terminal to feed back downlink data information in the fast message. information.
  • the feedback indication information includes: indication information indicating a sequence of feedback acknowledgement ACK information or negative acknowledgement NACK information for the unicast service carried in the fast message, and/or for configuring feedback Configuration information of a sequence of ACK messages or negative acknowledgment NACK messages.
  • the device further includes: a first receiving module, configured to receive the ACK information or NACK information fed back by the terminal; and a second receiving module, configured to receive an uplink fast transmission message transmitted by the terminal, where And transmitting, by the terminal, the sequence of the uplink fast transmission message immediately following the ACK information or the NACK information in the time domain.
  • a first receiving module configured to receive the ACK information or NACK information fed back by the terminal
  • a second receiving module configured to receive an uplink fast transmission message transmitted by the terminal, where And transmitting, by the terminal, the sequence of the uplink fast transmission message immediately following the ACK information or the NACK information in the time domain.
  • the ACK information or the NACK information corresponds to a preamble configured by a base station, and the indication information and/or configuration information includes random access channel configuration information.
  • the preamble configured by the base station can be used or not used for the uplink random access of the terminal, where the preamble that can be used for the uplink random access of the terminal is not applicable to the The preamble of the terminal performing uplink random access is different.
  • the device further includes: a third receiving module, configured to receive a preamble fed back by the terminal; and a second sending module, configured to: when the preamble fed back by the terminal has the capability of feeding back ACK information or NACK information, and When the preamble fed back by the terminal has the capability of performing uplink random access, the random access response RAR message is sent to the terminal; when the preamble fed back by the terminal only has the capability of feeding back ACK information or NACK information, the preamble is not sent. Random access response RAR message.
  • a third receiving module configured to receive a preamble fed back by the terminal
  • a second sending module configured to: when the preamble fed back by the terminal has the capability of feeding back ACK information or NACK information, and When the preamble fed back by the terminal has the capability of performing uplink random access, the random access response RAR message is sent to the terminal; when the preamble fed back by the terminal only has the capability of feeding back ACK information or NACK information, the preamble is not sent.
  • the method further includes: stopping, configured, when the at least one of the following conditions is met, the base station stops sending the fast message: the base station receives the terminal The acknowledged acknowledgement ACK information; the waiting time after the base station sends the fast message exceeds a predetermined threshold.
  • a device for receiving downlink data is provided.
  • the device is located at the terminal side, and includes: a fourth receiving module, configured to receive a fast message that is directly sent by the base station and carries downlink data information.
  • the downlink data information includes at least one of the following: a unicast service, a multicast service, and a broadcast service;
  • the fast message includes at least one of the following: a specific fast message that is scrambled by the private wireless network temporary identifier RNTI And the paging message, the broadcast message, wherein, when the downlink data information includes the unicast service, the fast message further includes at least the terminal for feeding back the downlink data information in the fast message. Feedback instructions.
  • the feedback indication information includes: indication information for indicating, by the terminal, a sequence of positive acknowledgment ACK information or negative acknowledgment NACK information for the unicast service carried in the fast message, and/or configured for The terminal feeds back configuration information of a sequence of positive acknowledgement ACK information or negative acknowledgement NACK information to the unicast service carried in the fast message.
  • the device further includes: a feedback module, configured to feed back the ACK information or the NACK information to the base station; and the transmitting module is configured to transmit the sequence of the ACK information or the NACK information immediately after the time domain. Fast uplink transmission of messages.
  • the ACK information or the NACK information corresponds to a preamble configured by the base station, and the indication information and/or configuration information includes random access channel configuration information.
  • the preamble corresponding to the ACK information or the NACK information can be used or not used for uplink random access by the terminal, where the preamble and the uplink that can be used for the uplink random access of the terminal are Enough for the end
  • the preamble for performing uplink random access is different.
  • the apparatus further includes: a third sending module, configured to send a preamble to the base station; and a fifth receiving module, configured to: when the transmitted preamble has the capability of feeding back ACK information or NACK information, and And receiving, by the terminal, the random access response RAR message sent by the base station, when the preamble fed back by the terminal has the capability of performing uplink random access.
  • a third sending module configured to send a preamble to the base station
  • a fifth receiving module configured to: when the transmitted preamble has the capability of feeding back ACK information or NACK information, and And receiving, by the terminal, the random access response RAR message sent by the base station, when the preamble fed back by the terminal has the capability of performing uplink random access.
  • Another embodiment of the present invention provides a computer storage medium storing execution instructions for performing the method in the above embodiments.
  • the base station when the base station needs to send the downlink service, the base station directly sends the fast message carrying the downlink data information, and does not need to perform a series of interaction with the terminal, and then sends the downlink data, thereby reducing the delay of the data transmission and solving the related
  • the downlink scheduling method in the technology has a complicated process and a large delay, thereby achieving the complexity of reducing the downlink scheduling mode process and reducing the delay effect.
  • FIG. 1 is a flowchart of a method for transmitting downlink data according to an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of a specific fast message corresponding to scrambling using a proprietary RNTI according to an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of a broadcast message when a downlink fast transmission user unicast service is performed according to an embodiment of the present invention
  • FIG. 4 is a schematic structural diagram of a paging message in an LTE/LTE-A system in the related art
  • FIG. 5 is a schematic structural diagram of a paging message when a downlink fast transmission user unicast service is performed according to an embodiment of the present invention
  • FIG. 6 is a schematic structural diagram of a paging message when downlink broadcast information is rapidly transmitted according to an embodiment of the present invention
  • FIG. 7 is a schematic structural diagram of a paging message when a downlink fast simultaneous transmission of a user unicast service and broadcast information is performed according to an embodiment of the present invention
  • FIG. 8 is a flowchart of a method for receiving downlink data according to an embodiment of the present invention.
  • FIG. 9 is a structural block diagram of a device for transmitting downlink data according to an embodiment of the present invention.
  • FIG. 10 is a block diagram 1 showing a preferred structure of a downlink data transmitting apparatus according to an embodiment of the present invention
  • FIG. 11 is a block diagram 2 of a preferred structure of a transmitting apparatus for downlink data according to an embodiment of the present invention
  • FIG. 12 is a block diagram 3 of a preferred structure of a transmitting apparatus for downlink data according to an embodiment of the present invention
  • FIG. 13 is a structural block diagram of a receiving apparatus for downlink data according to an embodiment of the present invention.
  • FIG. 14 is a block diagram 1 showing a preferred structure of a receiving apparatus for downlink data according to an embodiment of the present invention.
  • FIG. 15 is a block diagram 2 showing a preferred structure of a receiving apparatus for downlink data according to an embodiment of the present invention.
  • FIG. 1 is a flowchart of a method for transmitting downlink data according to an embodiment of the present invention. As shown in FIG. 1, the process includes the following steps:
  • Step S102 When the base station needs to send the downlink service, the base station directly sends a fast message carrying the downlink data information.
  • the base station when the base station needs to send the downlink service, the base station does not need to perform the scheduling interaction, and directly sends the fast message carrying the downlink data information, without performing a series of interactions with the terminal, and then sending the downlink data, thereby reducing the delay of the data transmission. .
  • the problem that the downlink scheduling mode in the related art has a complicated process and a large delay is solved, thereby achieving the complexity of reducing the downlink scheduling mode process and reducing the delay effect.
  • the downlink data information may include at least one of the following: a unicast service, a multicast service, and a broadcast service; the foregoing fast message may include at least one of the following: a temporary identifier by a proprietary wireless network (Radio) A specific fast message, a paging message, and a broadcast message that are scrambled by the Network Temporary Identifier (referred to as RNTI); wherein, when the downlink data information includes a unicast service, the fast message further carries at least the terminal for the fast message. The feedback information of the downlink data information is fed back.
  • Radio proprietary wireless network
  • RNTI Network Temporary Identifier
  • the specific fast message that is scrambled by the private RNTI may be a specific fast message of a certain user corresponding to the cell that is scrambled by the Cell Radio Network Temporary Identifier (C-RNTI), or may be The specific fast message corresponding to the scrambling of the private RNTI is used and the downlink data information of one or more users can be carried.
  • C-RNTI Cell Radio Network Temporary Identifier
  • a specific fast message corresponding to a preferred private RNTI scrambling is composed of a bearer user information list (ie, a downlink data information list) and optional other information, wherein the user information list is further determined by each user.
  • the message block is composed of one or more users, and each user message block is composed of a user equipment (User Equipment, UE for short) identifier (ID), user data, and feedback indication information.
  • UE User Equipment
  • the sending, by the base station, the fast message carrying the downlink data information includes: sending a fast message carrying downlink data information of one or more users;
  • the sending, by the base station, the fast message carrying the downlink data information includes: sending a fast message carrying one or more multicast services and/or broadcast services.
  • the fast message when the downlink data information includes a unicast service, where the fast message includes a specific fast message or a broadcast message that is scrambled by the private wireless network temporary identifier RNTI, the fast message further carries a downlink. Data Terminal identification information corresponding to the information.
  • the user list information is added to the system information block (SIB) message in the related art when the fast message carrying the downlink data information is a broadcast message.
  • SIB system information block
  • FIG. 3 is a schematic structural diagram of a broadcast message when a downlink fast transmission user unicast service is used according to an embodiment of the present invention, where the user information list is further composed of message blocks of each user, and may include one or more users.
  • Each user message block is composed of a UE ID, a user message, and feedback indication information.
  • the paging message Paging Message structure in the related art is as shown in FIG. 4, and FIG. 4 is a schematic structural diagram of a paging message in the LTE/LTE-A system in the related art.
  • the paging message supports one or more UEs, and the specific subdivision to the UE-level message is a paging record Paging Record.
  • the Paging Record includes the user equipment identifier ue-Identity and the core network core network domain cn-Domain. Different UEs can identify their own paging information by checking ue-Identity.
  • FIG. 5 is a schematic structural diagram of a paging message when a downlink fast transmission user unicast service is performed according to an embodiment of the present invention.
  • the paging message may carry one or more users. Downstream data information, and carrying the feedback indication information corresponding to the downlink data information, and correspondingly adding the downlink data information user equipment data ue-Data and the feedback indication information Feedback Indication in the Paging Record.
  • FIG. 6 is a schematic structural diagram of a paging message when a downlink fast transmission broadcast information is used according to an embodiment of the present invention.
  • a base station sends a broadcast message or a multicast message (hereinafter referred to as a broadcast/multicast message), as shown in FIG.
  • the call message may carry one or more different broadcast/multicast messages, and correspondingly add a broadcast/multicast message BroadcastInfo to the Paging message.
  • 7 is a schematic structural diagram of a paging message when a downlink fast simultaneous transmission of a user unicast service and broadcast information is performed according to an embodiment of the present invention.
  • a base station simultaneously transmits a user unicast data and a broadcast/multicast message, as shown in FIG.
  • the paging message may carry one or more different broadcast/multicast messages and downlink data information of one or more users, and simultaneously carry feedback indication information corresponding to the downlink data information, and correspondingly add a broadcast/group in the paging message.
  • the broadcast message BroadcastInfo adds the downlink data information ue-Data and the feedback indication Feedback Indication information to the Paging Record.
  • the feedback indication information includes: indication information indicating a sequence of feedback acknowledgement ACK information or negative acknowledgement NACK information for a unicast service carried in the fast message, and/or for configuring
  • the configuration information of the sequence of the positive acknowledgement ACK information or the negative acknowledgement NACK information is fed back, that is, the feedback indication information may be used to indicate or configure the terminal to feed back related parameter information indicating a sequence of the ACK information or the NACK information. Since the terminal does not perform uplink synchronization at this time, it is necessary to use a sequence of a certain length of time to represent an ACK or a NACK.
  • the method further includes: the base station receiving the ACK information or the NACK information fed back by the terminal; the base station receiving the uplink fast transmission message transmitted by the terminal, where the uplink is fast
  • the sequence in which the transport message carries the ACK information or the NACK information in the time domain is transmitted by the terminal. That is, when the terminal receives the downlink fast transmission message and has the requirement of the uplink fast transmission message, the downlink fast transmission message may be considered as the condition for triggering the uplink fast transmission, and the uplink fast transmission message immediately follows the sequence of carrying the ACK or the NACK.
  • the transmission is performed, that is, the previous part of the sequence can not only feed back the ACK or NACK of the downlink fast transmission, but also serve as the uplink fast transmission data information after the uplink synchronization protection.
  • the foregoing ACK information or NACK information corresponds to a preamble configured by a base station, and the indication information and/or configuration information includes random access channel configuration information.
  • the order indicating the ACK information or the NACK information The column is preferably a preamble sequence preamble in the physical random access channel PRACH, and the feedback indication information is PRACH configuration information to determine the preamble used by the terminal to feed back the ACK or NACK.
  • the feedback indication information includes configuration information of the preamble corresponding to the indicated ACK information and configuration information of the preamble corresponding to the indicated NACK information;
  • the base station determines that the terminal receives and demodulates the ticket carried in the fast message
  • the ACK information is fed back, and when the terminal receives and demodulates the unicast service error carried in the fast message without feedback information, the feedback indication information includes configuration information of the preamble corresponding to the indicated ACK information; Determining, when the terminal receives and demodulates the unicast service carried in the fast message, and does not feed back the information, and the terminal receives and demodulates the NACK information when the unicast service error is carried in the fast message, the feedback indication information includes
  • Configuration information of the preamble corresponding to the NACK information (1) When it is determined that the unicast service carried in the demodulation fast message is correct, the ACK information is fed back, and when the unicast service error carried in the demodulation fast message is received, the NACK information is fed back, and the feedback indication information includes the indication ACK and The configuration information of the preamble corresponding to the NACK, that is, the feedback indication information explicitly configures the preamble used by the ACK and the NACK.
  • the information uses 6 bits to indicate one of the 64 preambles corresponding to the ACK, and the 6bit indicates that one of the 64 preambles corresponds to the NACK.
  • the 4-bit information indicates a physical random access channel (Physical Random Access Channel, PRACH) mask index MASK Index, indicating the subframe index index to which it is transmitted; or the method for indicating the ACK and the NACK using the preamble includes using a 6-bit indication One of the 64 preambles corresponds to the ACK, and the next one corresponds to the NACK; or the method of using the preamble to indicate the ACK and the NACK further includes using 11 bits to indicate that the two different ones of the 64 preambles respectively correspond to the ACK and the NACK; (2) When it is determined that the unicast service carried in the demodulation fast message is correct, the ACK is fed back, and the unicast carried in the demodulation fast message is received.
  • PRACH Physical Random Access Channel
  • the feedback indication information does not include the configuration information indicating the preamble corresponding to the ACK, that is, the feedback indication information explicitly configures the preamble used by the ACK, and the information uses 6 bits to indicate one of the 64 preambles corresponding to the ACK, and the 4 bit information.
  • the feedback indication information includes only the configuration information indicating the preamble corresponding to the NACK, that is, the feedback indication information explicitly configures the preamble used by the NACK, and the information uses 6 bits to indicate one of the 64 preambles corresponding to the NACK, and the 4bit information indicates the PRACH MASK Index. Indicates the index of the subframe it sends.
  • the foregoing base station configures a preamble for the same terminal to feed back ACK information and NACK information, and provides a preamble for the same terminal to feed back ACK information and a NACK information configuration for the same terminal.
  • the root sequence of the preamble is the same and/or the cyclic shift step is the same. Among them, generating 64 preambles in a cell may require multiple root sequences, and even if the maximum cyclic shift step is selected, one root sequence may generate two preambles.
  • the root sequence corresponding to the preamble for indicating the feedback information ACK or NACK is used as far as possible for the random sequence.
  • the root sequence corresponding to the access preamble is different, and the root sequence corresponding to the preamble of the feedback information ACK or NACK is only a small part relative to the root sequence corresponding to the preamble used for random access.
  • the preamble corresponding to the ACK information or the NACK information is a preamble determined by the base station according to a root sequence of the finite set and/or a cyclic shift type of the finite set.
  • a root sequence of the finite set used to indicate feedback information ACK or The root sequence corresponding to the preamble of the NACK is only a small part relative to the root sequence corresponding to the preamble used for random access, that is, it is a finite set.
  • the cyclic shift type that can be used is a part of the cyclic shift type when the random access preamble is generated only. The value is also a finite set.
  • the time domain length of the preamble configured by the base station is less than or equal to one subframe length; wherein, when the time domain length of the preamble configured by the base station is less than one subframe length, the feedback indication
  • the information further includes indication information indicating an Orthogonal Frequency Division Multiplexing (OFDM) symbol position used in the subframe, where the OFDM symbol position is an OFDM symbol position where the preamble configured by the base station is located.
  • OFDM Orthogonal Frequency Division Multiplexing
  • the fast downlink data transmission method in this embodiment mainly considers a low-latency communication scenario (other optional scenarios are non-synchronous transmission scenarios, or small data transmission scenarios, etc.), and the cell coverage is not large at this time, and does not need to be long. Preamble.
  • the preamble time domain length for indicating the feedback information ACK or NACK is preferably less than or equal to 1 subframe length, that is, preferably format1.
  • format 4 is preferred.
  • the feedback indication information further needs to include an OFDM symbol position used in the indication subframe, for example, the sub-frame may be used for less than 1 subframe length.
  • the OFDM group of the preamble is numbered. If it is not overlapped, it is assumed that it occupies 2 OFDM. Then, 14 OFDM symbols in one subframe are divided into 7 consecutive groups. In this case, 3 bits are used to notify the OFDM at which the preamble is located. Transfer in the group.
  • the preamble configured by the base station can be used or not used for uplink random access of the terminal, where the preamble capable of performing uplink random access by the terminal and the terminal cannot be used for the terminal
  • the preamble for performing uplink random access is different. That is, the feedback indication information can be used not only for the terminal to feed back the ACK information or the preamble corresponding to the NACK information, but also for indicating the preamble used by the terminal for the uplink random access. That is, while performing fast downlink data transmission at this time, the terminal can further complete the uplink synchronization process.
  • the preamble corresponding to the feedback ACK or NACK of the representative terminal at this time has two functions, one is for feedback ACK or NACK to make correct or wrong feedback to the fast downlink transmission, so that the base station can get the confirmation information, and the second is for uplink synchronization.
  • the preamble simultaneously sends a preamble to the base station for the first terminal in the random access procedure.
  • the preamble for the terminal to feed back the ACK or the NACK and the uplink random access is different from the preamble used only for the terminal to feed back the ACK or the NACK, that is, the two preambles are part of the 64 preambles in the cell, and the two preambles different.
  • the base station further includes: the base station receives the preamble fed back by the terminal; and the preamble fed back by the terminal has the capability of feeding back the ACK information or the NACK information.
  • the base station sends a random access response (RAR) message to the terminal; when the preamble fed back by the terminal only has feedback ACK information
  • RAR random access response
  • the terminal After receiving the user data in the correct paging message, the terminal uses the preamble that represents the ACK to perform the feedback, and the preamble also has the random access function.
  • the base station After receiving the preamble, the base station stops sending the paging message containing the user data of the terminal. The RAR message is simultaneously sent to continue the random access procedure. After receiving the user data in the incorrect paging message, the terminal uses the preamble representing the NACK to perform the feedback, and the preamble also has the random access function. After receiving the preamble, the base station continues to send the paging message containing the user data of the terminal, and simultaneously sends the paging message. The RAR message continues the random access procedure. After receiving the preamble that only has the function of feeding back ACK information or NACK information, the base station does not send the base station. Send the corresponding RAR message.
  • the base station when the downlink data information includes the unicast service, after the base station directly sends the fast message carrying the downlink data information, the base station further includes: when the at least one of the following conditions is met, the base station stops sending the fast message.
  • the base station receives the acknowledgement ACK information fed back by the terminal; the waiting time after the base station sends the fast message exceeds a predetermined threshold.
  • the base station after transmitting the paging message containing the user data, the base station waits for the feedback information of the user. If the preamble corresponding to the ACK fed back by the terminal is received, the paging message is sent periodically, and therefore stops. Send a paging message containing the unicast service of the terminal.
  • the base station only instructs the terminal to receive the data error feedback NACK, after the NACK is not received and the waiting time is greater than the threshold X (same threshold value as described above), the receiving is considered to be correct, and the paging message containing the unicast service of the terminal is stopped.
  • the value of X may be the time corresponding to one or more paging message periods.
  • FIG. 8 is a flowchart of a method for receiving downlink data according to an embodiment of the present invention. As shown in FIG. 8, the process includes the following steps:
  • Step S802 The terminal receives a fast message that is directly sent by the base station and carries downlink data information.
  • the terminal can receive the fast message carrying the downlink data information directly sent by the base station without performing the scheduling interaction with the base station, and thus, when the base station needs to send the downlink service to the terminal, the terminal does not need to perform a series with the terminal. After the interaction, the downlink data is sent again, which reduces the delay of data transmission.
  • the problem that the downlink scheduling mode in the related art has a complicated process and a large delay is solved, thereby achieving the complexity of reducing the downlink scheduling mode process and reducing the delay effect.
  • the downlink data information includes at least one of the following: a unicast service, a multicast service, and a broadcast service;
  • the foregoing fast message includes at least one of the following: scrambling the RNTI by the private wireless network temporary identifier The specific fast message, the paging message, and the broadcast message; wherein, when the downlink data information includes the unicast service, the fast message further includes at least feedback indication information for the terminal to feed back the downlink data information in the fast message.
  • the specific fast message that is scrambled by the private RNTI may be a specific fast message of a certain user corresponding to the cell that is scrambled by the Cell Radio Network Temporary Identifier (C-RNTI), or may be The specific fast message corresponding to the scrambling of the private RNTI is used and the downlink data information of one or more users can be carried.
  • a specific fast message corresponding to a preferred private RNTI scrambling is composed of a bearer user information list and optional other information, wherein the user information list is further composed of message blocks of respective users, and may include one or A plurality of users, wherein each user message block is composed of a User Equipment (UE) identifier (ID), a user message, and feedback indication information.
  • UE User Equipment
  • ID User Equipment
  • the foregoing feedback indication information includes: indication information for indicating, by the terminal, a sequence of acknowledgment acknowledgment ACK information or negative acknowledgment NACK information for the unicast service carried in the fast message, and/or for configuring
  • the terminal feeds back the configuration information of the sequence of the acknowledgement ACK information or the negative acknowledgement NACK information to the unicast service carried in the fast message, that is, the feedback indication information may be used to indicate or configure the terminal to feedback the sequence of the ACK information or the NACK information.
  • Parameter information Since the terminal does not perform uplink synchronization at this time, it is necessary to use a sequence of a certain length of time to represent an ACK or a NACK.
  • the terminal further includes: the terminal feeding back the ACK information or the NACK information to the base station; the terminal immediately carries the ACK information in the time domain.
  • the sequence of NACK information transmits an uplink fast transmission message. That is, when the terminal receives the downlink fast transmission message and has the requirement of the uplink fast transmission message, the downlink fast transmission message may be considered as the condition for triggering the uplink fast transmission, and the uplink fast transmission message immediately carries the ACK information or the NACK information.
  • the sequence is transmitted, that is, the previous part of the sequence can not only feed back the ACK information or the NACK information of the downlink fast transmission, but also serve as the uplink fast transmission data information after the uplink synchronization protection.
  • the foregoing ACK information or NACK information corresponds to a preamble configured by a base station
  • the indication information and/or configuration information includes random access channel configuration information.
  • the sequence indicating the ACK information or the NACK information is preferably a preamble sequence preamble in the physical random access channel PRACH.
  • the feedback indication information is PRACH configuration information, and is used to determine a preamble used by the terminal to feed back ACK information or NACK information.
  • the feedback indication information includes configuration information of the preamble corresponding to the indicated ACK information and configuration information of the preamble corresponding to the indicated NACK information; and the ACK information is fed back when the terminal receives and demodulates the unicast service carried in the fast message correctly, and
  • the feedback indication information includes the configuration information of the preamble corresponding to the indicated ACK information; when the terminal receives and demodulates the unicast service carried in the fast message When the information is not fed back correctly, and the NACK information is fed back when the unicast service error carried in the fast message is received and demodulated, the feedback indication information includes configuration information of the preamble corresponding to the indicated NACK information.
  • the terminal receives the unicast service correct feedback ACK carried in the demodulation fast message, and receives the unicast service error feedback NACK carried in the demodulation fast message, where the feedback indication information includes a configuration indicating a preamble corresponding to the ACK and the NACK.
  • the information that is, the feedback indication information, explicitly configures the preamble used by the ACK and the NACK.
  • the information uses 6 bits to indicate one of the 64 preambles corresponding to the ACK, 6 bits to indicate one of the 64 preambles corresponding to the NACK, and the 4 bit information indicates the PRACH.
  • the mask index MASK Index indicates the subframe index index to which it is transmitted; or the method of using the preamble to indicate ACK and NACK further includes using 6 bits to indicate one corresponding ACK of 64 preambles, and the next one corresponding to NACK; or The method for indicating the ACK and the NACK using the preamble further includes: using 11 bits to indicate that the two different ones of the 64 preambles respectively correspond to the ACK and the NACK; (2) the terminal receiving the correct feedback ACK of the unicast service carried in the demodulation fast message, and receiving The unicast service error carried in the demodulation fast message is not fed back, and the feedback indication information only includes the configuration information indicating the preamble corresponding to the ACK, that is, the feedback indication Clearly configure the preamble used by the ACK.
  • the information uses 6 bits to indicate one of the 64 preambles corresponding to the ACK, and the 4 bit information indicates the PRACH MASK Index to indicate the subframe index to which it is transmitted.
  • the terminal receives the demodulation fast message.
  • the carried unicast service is correct and does not feedback, and receives the unicast service error feedback NACK carried in the demodulation fast message.
  • the feedback indication information only includes the configuration information indicating the preamble corresponding to the NACK, that is, the feedback indication information explicitly configures the preamble used by the NACK, and the The information uses 6 bits to indicate that one of the 64 preambles corresponds to the NACK, and the 4-bit information indicates the PRACH MASK Index, indicating the subframe index to which it is transmitted.
  • the preamble corresponding to the foregoing ACK information and the preamble corresponding to the NACK information are preambles respectively configured by the base station, and the preamble corresponding to the ACK information and the preamble corresponding to the NACK information have the same root sequence.
  • the cyclic shift step is the same. Among them, 64 preambles generated in a cell may require multiple root sequences, even if the maximum is selected. The cyclic shift step size, a root sequence can also produce two preambles.
  • the root sequence corresponding to the preamble for indicating the feedback information ACK or NACK is used as far as possible for the random sequence.
  • the root sequence corresponding to the access preamble is different, and the root sequence corresponding to the preamble of the feedback information ACK or NACK is only a small part relative to the root sequence corresponding to the preamble used for random access.
  • the preamble corresponding to the ACK information or the NACK information is a preamble determined by the base station according to a root sequence of the finite set and/or a cyclic shift type of the finite set.
  • the root sequence corresponding to the preamble indicating the feedback information ACK or NACK is only a small part relative to the root sequence corresponding to the preamble for random access, that is, it is a finite set.
  • the cyclic shift type that can be used is a part of the cyclic shift type when the random access preamble is generated only. The value is also a finite set.
  • the time domain length of the preamble corresponding to the ACK information or the NACK information is less than or equal to one subframe length; wherein, the time domain length of the preamble corresponding to the ACK information or the NACK information is less than one sub-length
  • the feedback indication information further includes indication information indicating an Orthogonal Frequency Division Multiplexing (OFDM) symbol position used in the subframe, and the used OFDM symbol position is a preamble of the base station configuration. The OFDM symbol position at which the code is located.
  • OFDM Orthogonal Frequency Division Multiplexing
  • the fast downlink data transmission method in this embodiment mainly considers a low-latency communication scenario (other optional scenarios are non-synchronous transmission scenarios, or small data transmission scenarios, etc.), and the cell coverage is not large at this time, and does not need to be long.
  • the preamble time domain length for indicating the feedback information ACK or NACK is preferably less than or equal to 1 subframe length, that is, preferably format1.
  • format 4 is preferred.
  • the feedback indication information further needs to include an OFDM symbol position used in the indication subframe, for example, the sub-frame may be used for less than 1 subframe length.
  • the OFDM group of the preamble is numbered. If it is not overlapped, it is assumed that it occupies 2 OFDM. Then, 14 OFDM symbols in one subframe are divided into 7 consecutive groups. In this case, 3 bits are used to notify the OFDM at which the preamble is located. Transfer in the group.
  • the foregoing preamble corresponding to the ACK information or the NACK information can be used or not used for the terminal to perform uplink random access, where the preamble and the uplink that can be used for the terminal to perform uplink random access
  • the preambles that are sufficient for the terminal to perform uplink random access are different. That is, the feedback indication information is used not only for the terminal to feed back the preamble corresponding to the ACK or the NACK information, but also for indicating the preamble used by the terminal for the uplink random access. That is, while performing fast downlink data transmission at this time, the terminal can further complete the uplink synchronization process.
  • the preamble corresponding to the feedback ACK or NACK of the representative terminal at this time has two functions, one is for feedback ACK or NACK to make correct or wrong feedback to the fast downlink transmission, so that the base station can get the confirmation information, and the second is for uplink synchronization.
  • the preamble simultaneously sends a preamble to the base station for the first terminal in the random access procedure.
  • the preamble for the terminal to feed back the ACK or the NACK and the uplink random access is different from the preamble used only for the terminal to feed back the ACK or the NACK, that is, the two preambles are part of the 64 preambles in the cell, and the two preambles different.
  • the terminal after receiving the fast message that carries the downlink data information sent by the base station, the terminal further includes: the terminal sending the preamble to the base station; and the preamble sent by the terminal has the feedback ACK information or the NACK information. Capability, and the preamble fed back by the terminal has the capability of performing uplink random access at the same time, the terminal receives the base station The random access response is sent to the RAR message.
  • the terminal after receiving the user data in the correct paging message, the terminal uses the preamble representing the ACK to perform feedback, and the preamble also has a random access function. After receiving the preamble, the base station stops sending the content.
  • the paging message of the end user data simultaneously sends the RAR message to continue the random access process.
  • the terminal uses the preamble representing the NACK to perform the feedback, and the preamble also has the random access function.
  • the base station continues to send the paging message containing the user data of the terminal, and simultaneously sends the paging message.
  • the RAR message continues the random access procedure. After receiving the preamble with only the feedback ACK or NACK function, the base station does not send the corresponding RAR message.
  • the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware, but in many cases, the former is A better implementation.
  • the technical solution of the present invention which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk,
  • the optical disc includes a number of instructions for causing a terminal device (which may be a cell phone, a computer, a server, or a network device, etc.) to perform the methods of various embodiments of the present invention.
  • a device for transmitting downlink data is provided, which is used to implement the foregoing embodiments and preferred embodiments, and details are not described herein.
  • the term "module” may implement a combination of software and/or hardware of a predetermined function.
  • the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.
  • FIG. 9 is a structural block diagram of a downlink data transmitting apparatus according to an embodiment of the present invention.
  • the apparatus may be located at a base station side.
  • the apparatus includes a transmitting module 92, which will be described below.
  • the sending module 92 is configured to directly send a fast message carrying downlink data information when the downlink service needs to be sent.
  • the downlink data information may include at least one of the following: a unicast service, a multicast service, and a broadcast service; the foregoing fast message may include at least one of the following: a temporary identifier of the RNTI added by the proprietary wireless network.
  • the specific fast message, the paging message, and the broadcast message are spoofed; wherein, when the downlink data information includes the unicast service, the fast message further includes at least feedback indication information for the terminal to feed back the downlink data information in the fast message.
  • the specific fast message that is scrambled by the private RNTI may be a specific fast message of a certain user corresponding to the cell that is scrambled by the Cell Radio Network Temporary Identifier (C-RNTI), or may be The specific fast message corresponding to the scrambling of the private RNTI is used and the downlink data information of one or more users can be carried.
  • a specific fast message corresponding to a preferred private RNTI scrambling is composed of a bearer user information list and optional other information, wherein the user information list is further composed of message blocks of respective users, and may include one or A plurality of users, wherein each user message block is composed of a User Equipment (UE) identifier (ID), a user message, and feedback indication information.
  • UE User Equipment
  • ID User Equipment
  • the sending, by the base station, the fast message carrying the downlink data information includes: sending a fast message carrying downlink data information of one or more users;
  • the sending, by the base station, the fast message carrying the downlink data information includes: sending a fast message carrying one or more multicast services and/or broadcast services.
  • the fast message when the downlink data information includes a unicast service, where the fast message includes a specific fast message or a broadcast message that is scrambled by the private wireless network temporary identifier RNTI, the fast message further carries a downlink. Terminal identification information corresponding to the data information.
  • the user list information is added to the system information block (SIB) message in the related art when the fast message carrying the downlink data information is a broadcast message.
  • SIB system information block
  • the user information list is further composed of message blocks of respective users, and may include one or more users, wherein each user message block is composed of a UE ID, a user message, and feedback indication information.
  • the paging message Paging Message structure in the related art is as shown in FIG. 4, and the paging message supports one or more UEs, and specifically subdivided into a message capable of distinguishing UE level into paging.
  • the Paging Record is recorded in the related art.
  • the Paging Record includes the user equipment identifier ue-Identity and the cn domain cn-Domain. Different UEs can identify their own paging information by checking ue-Identity.
  • the paging message can notify the system information change, ETWS alarm and other information.
  • the paging message may carry the downlink data information of one or more users, and simultaneously carry the feedback indication information corresponding to the downlink data information, and correspondingly add the downlink in the Paging Record.
  • the base station sends a broadcast message or a multicast message (hereinafter referred to as a broadcast/multicast message), as shown in FIG. 6, the paging message may carry one or more different broadcast/multicast messages, correspondingly in the Paging message. Add the broadcast/multicast message BroadcastInfo. If the base station simultaneously transmits the unicast data and the broadcast/multicast message, as shown in FIG.
  • the paging message may carry one or more different broadcast/multicast messages and downlink data information of one or more users. And carrying the feedback indication information corresponding to the downlink data information, adding a broadcast/multicast message BroadcastInfo to the Paging message, and adding the downlink data information ue-Data and the feedback indication information Feedback Indication to the Paging Record.
  • the feedback indication information includes: indication information indicating a sequence of feedback acknowledgement ACK information or negative acknowledgement NACK information for a unicast service carried in the fast message, and/or for configuring
  • the configuration information of the sequence of the positive acknowledgement ACK information or the negative acknowledgement NACK information is fed back, that is, the feedback indication information may be used to indicate or configure the terminal to feed back related parameter information indicating a sequence of the ACK information or the NACK information. Since the terminal does not perform uplink synchronization at this time, it is necessary to use a sequence of a certain length of time to represent an ACK or a NACK.
  • FIG. 10 is a block diagram of a preferred structure of a transmitting apparatus for downlink data according to an embodiment of the present invention. As shown in FIG. 10, the apparatus includes a first receiving module 102 and a second receiving, in addition to all the modules shown in FIG. Module 104, the device will be described below.
  • the first receiving module 102 is connected to the sending module 92, and is configured to receive ACK information or NACK information fed back by the terminal.
  • the second receiving module 104 is connected to the first receiving module 102, and is configured to receive an uplink fast transmission message transmitted by the terminal. And wherein the uplink fast transmission message is transmitted by the terminal in the time domain immediately following the sequence carrying the ACK information or the NACK information.
  • the foregoing ACK information or NACK information corresponds to a preamble configured by a base station
  • the indication information and/or configuration information includes random access channel configuration information.
  • the sequence indicating the ACK information or the NACK information is preferably a preamble sequence preamble in the physical random access channel PRACH.
  • the feedback indication information is PRACH configuration information, and is used to determine a preamble used by the terminal to feed back ACK information or NACK.
  • the base station determines that the terminal receives and demodulates the unicast service carried in the fast message
  • the NACK information is forwarded
  • the feedback indication information includes the configuration information of the preamble corresponding to the indicated ACK information and the indicated NACK information.
  • Configuration information of the preamble when the base station determines that the unicast service carried in the fast message is correct, the ACK information is fed back, and the terminal does not feedback information when receiving and demodulating the unicast service error carried in the fast message.
  • the feedback indication information includes configuration information of the preamble corresponding to the indicated ACK information.
  • the feedback indication information includes configuration information of the preamble corresponding to the indicated NACK information.
  • the configuration information that is, the feedback indication information, explicitly configures the preamble used by the ACK and the NACK, and the information uses 6 bits to indicate one of the 64 preambles corresponding to the ACK, and 6 bits to indicate one of the 64 preambles corresponding to the NACK, and the 4 bit information.
  • the method for indicating the ACK and the NACK using the preamble further includes using 6 bits to indicate one corresponding ACK of 64 preambles, and the next next corresponding NACK; Or the method for indicating the ACK and the NACK using the preamble further includes: using 11 bits to indicate that the two different ones of the 64 preambles respectively correspond to the ACK and the NACK; and (2) determining that the unicast service carried in the demodulation fast message is correct.
  • the ACK is sent, and the unicast service error carried in the demodulation fast message is not fed back.
  • the feedback indication information only includes the configuration information indicating the preamble corresponding to the ACK.
  • the feedback indication information explicitly configures the preamble used by the ACK
  • the information uses 6 bits to indicate one of the 64 preambles corresponding to the ACK
  • the 4bit information indicates the PRACH MASK Index, indicating the subframe index to which it is transmitted
  • the feedback indication information only includes the configuration information indicating the preamble corresponding to the NACK, that is, the feedback indication information is explicitly configured with the NACK.
  • the used preamble which uses 6 bits to indicate that one of the 64 preambles corresponds to a NACK
  • the 4-bit information indicates a PRACH MASK Index indicating the subframe index to which it is transmitted.
  • the foregoing base station configures a preamble for the same terminal to feed back ACK information and NACK information, and provides a preamble for the same terminal to feed back ACK information and a NACK information configuration for the same terminal.
  • the root sequence of the preamble is the same and/or the cyclic shift step is the same. Among them, generating 64 preambles in a cell may require multiple root sequences, and even if the maximum cyclic shift step is selected, one root sequence may generate two preambles.
  • the root sequence corresponding to the preamble for indicating the feedback information ACK or NACK is used as far as possible for the random sequence.
  • the root sequence corresponding to the access preamble is different, and the root sequence corresponding to the preamble of the feedback information ACK or NACK is only a small part relative to the root sequence corresponding to the preamble used for random access.
  • the preamble corresponding to the ACK information or the NACK information is a preamble determined by the base station according to a root sequence of the finite set and/or a cyclic shift type of the finite set.
  • the root sequence corresponding to the preamble indicating the feedback information ACK or NACK is only a small part relative to the root sequence corresponding to the preamble for random access, that is, it is a finite set.
  • the cyclic shift type that can be used is a part of the cyclic shift type when the random access preamble is generated only. The value is also a finite set.
  • the time domain length of the preamble configured by the base station is less than or equal to one subframe length; wherein, when the time domain length of the preamble configured by the base station is less than one subframe length, the feedback indication
  • the information further includes indication information indicating an Orthogonal Frequency Division Multiplexing (OFDM) symbol position used in the subframe, where the OFDM symbol position is an OFDM symbol position where the preamble configured by the base station is located.
  • OFDM Orthogonal Frequency Division Multiplexing
  • the fast downlink data transmission method in this embodiment mainly considers a low-latency communication scenario (other optional scenarios are non-synchronous transmission scenarios, or small data transmission scenarios, etc.), and the cell coverage is not large at this time, and does not need to be long. Preamble.
  • the preamble time domain length for indicating the feedback information ACK or NACK is preferably less than or equal to 1 subframe length, that is, preferably format1.
  • format 4 is preferred.
  • the feedback indication information further needs to include an OFDM symbol position used in the indication subframe, for example, the sub-frame may be used for less than 1 subframe length.
  • the OFDM group of the preamble is numbered. If it is not overlapped, it is assumed that it occupies 2 OFDM. Then, 14 OFDM symbols in one subframe are divided into 7 consecutive groups. In this case, 3 bits are used to notify the OFDM at which the preamble is located. Transfer in the group.
  • the preamble configured by the base station can be used or not used for uplink random access of the terminal, where the preamble capable of performing uplink random access by the terminal and the terminal cannot be used for the terminal
  • the preamble for performing uplink random access is different. That is, the feedback indication information can be used not only for the terminal to feed back the ACK information or the preamble corresponding to the NACK information, but also for indicating the preamble used by the terminal for the uplink random access. That is, while performing fast downlink data transmission at this time, the terminal can further complete the uplink synchronization process.
  • the preamble corresponding to the feedback ACK or NACK of the representative terminal at this time has two functions, one is for feedback ACK or NACK to make correct or wrong feedback to the fast downlink transmission, so that the base station can get the confirmation information, and the second is for uplink synchronization.
  • the preamble simultaneously sends a preamble to the base station for the first terminal in the random access procedure.
  • the preamble for the terminal to feed back the ACK or the NACK and the uplink random access is different from the preamble used only for the terminal to feed back the ACK or the NACK, that is, the two preambles are part of the 64 preambles in the cell, and the two preambles different.
  • FIG. 11 is a block diagram of a preferred structure of a transmitting apparatus for downlink data according to an embodiment of the present invention. As shown in FIG. 11, the apparatus includes a third receiving module 112 and a second sending, in addition to all the modules shown in FIG. Module 114, the device will be described below.
  • the third receiving module 112 is connected to the sending module 92, and is configured to receive the preamble fed back by the terminal.
  • the second sending module 114 is connected to the third receiving module 112, and is configured to: when the preamble fed back by the terminal has feedback ACK information or The capability of the NACK information, and the preamble fed back by the terminal has the capability of performing uplink random access, and sends a random access response RAR message to the terminal; and the preamble fed back by the terminal only has the capability of feeding back ACK information or NACK information. When the random access response RAR message is not sent.
  • FIG. 12 is a block diagram 3 of a preferred structure of a transmitting device for downlink data according to an embodiment of the present invention. As shown in FIG. 12, the device includes a stop module 122 in addition to all modules shown in FIG. Be explained.
  • the stopping module 122 is connected to the sending module 92, and is configured to stop sending the fast message when the downlink data information includes at least one of the following conditions: the base station receives the acknowledgement ACK information fed back by the terminal; The wait time after the fast message exceeds a predetermined threshold.
  • FIG. 13 is a structural block diagram of a receiving apparatus for downlink data according to an embodiment of the present invention.
  • the apparatus may be applied to a terminal.
  • the apparatus includes a fourth receiving module 132, which will be described below.
  • the fourth receiving module 132 is configured to receive a fast message that is directly sent by the base station and carries downlink data information.
  • the downlink data information includes at least one of the following: a unicast service, a multicast service, and a broadcast service;
  • the foregoing fast message includes at least one of the following: scrambling the RNTI by the private wireless network temporary identifier The specific fast message, the paging message, and the broadcast message; wherein, when the downlink data information includes the unicast service, the fast message further includes at least feedback indication information for the terminal to feed back the downlink data information in the fast message.
  • the specific fast message that is scrambled by the private RNTI may be a specific fast message of a certain user corresponding to the cell that is scrambled by the Cell Radio Network Temporary Identifier (C-RNTI), or may be The specific fast message corresponding to the scrambling of the private RNTI is used and the downlink data information of one or more users can be carried.
  • a specific fast message corresponding to a preferred private RNTI scrambling is composed of a bearer user information list and optional other information, wherein the user information list is further composed of message blocks of respective users, and may include one or A plurality of users, wherein each user message block is composed of a User Equipment (UE) identifier (ID), a user message, and feedback indication information.
  • UE User Equipment
  • ID User Equipment
  • the foregoing feedback indication information includes: indication information for indicating, by the terminal, a sequence of acknowledgment acknowledgment ACK information or negative acknowledgment NACK information for the unicast service carried in the fast message, and/or for configuring
  • the terminal feeds back the configuration information of the sequence of the acknowledgement ACK information or the negative acknowledgement NACK information to the unicast service carried in the fast message, that is, the feedback indication information may be used to indicate or configure the terminal to feedback the sequence of the ACK information or the NACK information.
  • Parameter information Since the terminal does not perform uplink synchronization at this time, it is necessary to use a sequence of a certain length of time to represent an ACK or a NACK.
  • FIG. 14 is a block diagram of a preferred structure of a receiving apparatus for downlink data according to an embodiment of the present invention. As shown in FIG. 14, the apparatus includes a feedback module 142 and a transmission module 144, in addition to all the modules shown in FIG. The device will be described.
  • the feedback module 142 is connected to the fourth receiving module 132, and is configured to feed back ACK information or NACK information to the base station.
  • the transmitting module 144 is connected to the feedback module 142, and is configured to carry ACK information or NACK information immediately in the time domain.
  • the sequence transmits uplink fast transmission messages.
  • the foregoing ACK information or NACK information corresponds to a preamble configured by a base station
  • the indication information and/or configuration information includes random access channel configuration information.
  • the sequence indicating the ACK information or the NACK information is preferably the preamble sequence preamble in the physical random access channel PRACH
  • the feedback indication information is the PRACH configuration information to determine the preamble used by the terminal to feed back the ACK or the NACK.
  • the feedback indication information includes configuration information of the preamble corresponding to the indicated ACK information and configuration information of the preamble corresponding to the indicated NACK information; and the ACK information is fed back when the terminal receives and demodulates the unicast service carried in the fast message correctly, and When the unicast service error carried in the fast message is received and demodulated, the feedback indication information includes the indicated ACK information pair.
  • the information includes configuration information of the preamble corresponding to the indicated NACK information.
  • the terminal receives the unicast service correct feedback ACK carried in the demodulation fast message, and receives the unicast service error feedback NACK carried in the demodulation fast message, where the feedback indication information includes a configuration indicating a preamble corresponding to the ACK and the NACK.
  • the information that is, the feedback indication information, explicitly configures the preamble used by the ACK and the NACK.
  • the information uses 6 bits to indicate one of the 64 preambles corresponding to the ACK, 6 bits to indicate one of the 64 preambles corresponding to the NACK, and the 4 bit information indicates the PRACH.
  • the mask index MASK Index indicates the subframe index index to which it is transmitted; or the method of using the preamble to indicate ACK and NACK further includes using 6 bits to indicate one corresponding ACK of 64 preambles, and the next one corresponding to NACK; or
  • the method for indicating the ACK and the NACK using the preamble further includes: using 11 bits to indicate that the two different ones of the 64 preambles respectively correspond to the ACK and the NACK; (2) the terminal receiving the correct feedback ACK of the unicast service carried in the demodulation fast message, and receiving The unicast service error carried in the demodulation fast message is not fed back, and the feedback indication information only includes the configuration information indicating the preamble corresponding to the ACK, that is, the feedback indication Clearly configure the preamble used by the ACK.
  • the information uses 6 bits to indicate one of the 64 preambles corresponding to the ACK, and the 4 bit information indicates the PRACH MASK Index to indicate the subframe index to which it is transmitted.
  • the terminal receives the demodulation fast message.
  • the carried unicast service is correct and does not feedback, and receives the unicast service error feedback NACK carried in the demodulation fast message.
  • the feedback indication information only includes the configuration information indicating the preamble corresponding to the NACK, that is, the feedback indication information explicitly configures the preamble used by the NACK, and the The information uses 6 bits to indicate that one of the 64 preambles corresponds to the NACK, and the 4-bit information indicates the PRACH MASK Index, indicating the subframe index to which it is transmitted.
  • the preamble corresponding to the foregoing ACK information and the preamble corresponding to the NACK information are preambles respectively configured by the base station, and the preamble corresponding to the ACK information and the preamble corresponding to the NACK information have the same root sequence. / or the cyclic shift step is the same. Among them, generating 64 preambles in a cell may require multiple root sequences, and even if the maximum cyclic shift step is selected, one root sequence may generate two preambles.
  • the root sequence corresponding to the preamble for indicating the feedback information ACK or NACK is used as far as possible for the random sequence.
  • the root sequence corresponding to the access preamble is different, and the root sequence corresponding to the preamble of the feedback information ACK or NACK is only a small part relative to the root sequence corresponding to the preamble used for random access.
  • the preamble corresponding to the ACK information or the NACK information is a preamble determined by the base station according to a root sequence of the finite set and/or a cyclic shift type of the finite set.
  • the root sequence corresponding to the preamble indicating the feedback information ACK or NACK is only a small part relative to the root sequence corresponding to the preamble for random access, that is, it is a finite set.
  • the cyclic shift type that can be used is a part of the cyclic shift type when the random access preamble is generated only. The value is also a finite set.
  • the time domain length of the preamble corresponding to the ACK information or the NACK information is less than or equal to one subframe length; wherein, the time domain length of the preamble corresponding to the ACK information or the NACK information is less than one sub-length
  • the feedback indication information further includes indication information indicating an Orthogonal Frequency Division Multiplexing (OFDM) symbol position used in the subframe, and the used OFDM symbol position is a preamble of the base station configuration.
  • OFDM symbol position at which the code is located The fast downlink data transmission method in this embodiment mainly considers low time.
  • the preamble time domain length for indicating the feedback information ACK or NACK is preferably less than or equal to 1 subframe length, that is, preferably format1.
  • format 4 is preferred.
  • the feedback indication information further needs to include an OFDM symbol position used in the indication subframe, for example, the sub-frame may be used for less than 1 subframe length.
  • the OFDM group of the preamble is numbered. If it is not overlapped, it is assumed that it occupies 2 OFDM. Then, 14 OFDM symbols in one subframe are divided into 7 consecutive groups. In this case, 3 bits are used to notify the OFDM at which the preamble is located. Transfer in the group.
  • the foregoing preamble corresponding to the ACK information or the NACK information can be used or not used for the terminal to perform uplink random access, where the preamble and the uplink that can be used for the terminal to perform uplink random access
  • the preambles that are sufficient for the terminal to perform uplink random access are different. That is, the feedback indication information is used not only for the terminal to feed back the ACK information or the preamble corresponding to the NACK information, but also for indicating the preamble used by the terminal for the uplink random access. That is, while performing fast downlink data transmission at this time, the terminal can further complete the uplink synchronization process.
  • the preamble corresponding to the feedback ACK or NACK of the representative terminal at this time has two functions, one is for feedback ACK or NACK to make correct or wrong feedback to the fast downlink transmission, so that the base station can get the confirmation information, and the second is for uplink synchronization.
  • the preamble simultaneously sends a preamble to the base station for the first terminal in the random access procedure.
  • the preamble for the terminal to feed back the ACK or the NACK and the uplink random access is different from the preamble used only for the terminal to feed back the ACK or the NACK, that is, the two preambles are part of the 64 preambles in the cell, and the two preambles different.
  • FIG. 15 is a block diagram of a preferred structure of a receiving apparatus for downlink data according to an embodiment of the present invention. As shown in FIG. 15, the apparatus includes a third transmitting module 152 and a fifth receiving, in addition to all the modules shown in FIG. Module 154, the device will be described below.
  • the third sending module 152 is connected to the fourth receiving module 132, and is configured to send a preamble to the base station.
  • the fifth receiving module 154 is connected to the third sending module 152, and is configured to: when the transmitted preamble has feedback ACK information or The capability of the NACK information, and the preamble fed back by the terminal has the capability of performing uplink random access, and receives the random access response RAR message sent by the base station.
  • each of the above modules may be implemented by software or hardware.
  • the foregoing may be implemented by, but not limited to, the foregoing modules are all located in the same processor; or, the modules are located in multiple In the processor.
  • Embodiments of the present invention also provide a storage medium.
  • the foregoing storage medium may be configured to store program code for performing the following steps:
  • the storage medium is further arranged to store program code for performing the following steps:
  • the terminal receives a fast message that is directly sent by the base station and carries downlink data information.
  • the foregoing storage medium may include, but is not limited to, a USB flash drive, a Read-Only Memory (ROM), and a Random Access Memory (RAM).
  • ROM Read-Only Memory
  • RAM Random Access Memory
  • Mobile hard A variety of media that can store program code, such as disks, disks, or optical disks.
  • This embodiment describes the downlink unicast data information transmission by using the method provided by the present invention.
  • the base station has the requirement that the downlink unicast service is sent to a certain terminal, and sends the fast message data that carries the downlink unicast data information.
  • the fast message data may be a specific fast message, a paging message, or a broadcast message corresponding to the scrambling of the dedicated RNTI.
  • the subsequent description is based on a paging message.
  • the paging message containing the downlink unicast service is sent, the paging message carries the downlink data information of the user, and carries the feedback indication information corresponding to the downlink data information.
  • the downlink data information ue-Data and the feedback indication information Feedback Indication are added to the Paging Record.
  • the terminal feedback acknowledgement or negative acknowledgement (ACK or NACK, hereinafter referred to as ACK/NACK) information configured by the feedback indication information is used by the terminal to receive a demodulation correct feedback ACK, and receive a demodulation error feedback NACK, where the feedback indication information includes an indication ACK and a NACK corresponding Configuration information for the preamble.
  • the information uses 6 bits to indicate one of the 64 preambles corresponding to the ACK, the next one corresponds to the NACK, and the 4 bit information indicates the PRACH MASK Index, indicating the subframe index to which it is transmitted;
  • the terminal receives the paging message at the paging moment capable of receiving the paging message, obtains the downlink user data sent by the base station by demodulating its own paging record message block according to the UE ID information, and obtains the preamble indication information of the feedback ACK/NACK.
  • the terminal receives the correct downlink user data, and feeds back the preamble representing the ACK on the subframe indicated by the base station.
  • the base station After receiving the preamble corresponding to the ACK fed back by the terminal, the base station stops sending the paging message containing the unicast service of the terminal.
  • the terminal can feedback whether the reception is correct when the uplink synchronization is not performed, so that the base station performs subsequent processing.
  • This embodiment describes the downlink broadcast data information transmission in detail by using the method provided by the present invention.
  • the base station has the requirement that the downlink broadcast service is sent to all the terminals or a group of terminals in the cell, and sends the fast message data that carries the downlink broadcast data information (where the fast message data may be a specific fast message, paging corresponding to the scrambling of the private RNTI). Messages, broadcast messages, and subsequent descriptions of paging messages are used as examples.
  • the broadcast/multicast message BroadcastInfo is added to the corresponding Paging message.
  • the terminal receives the paging message at the paging moment that can receive the paging message, obtains the paging time according to the UE ID information, and obtains the broadcast/multicast message BroadcastInfo delivered by the base station in the paging message.
  • the base station sends a paging message containing the broadcast/multicast message BroadcastInfo, and periodically transmits it, and the terminal periodically receives the message. If the reception is correct, you can continue to enter the idle mode to save power consumption. If the reception is wrong, you can continue to receive at the paging time until the reception is correct.
  • the problem that the terminal delays the downlink data transmission after the terminal wakes up/accesses the network from the idle state is improved, thereby ensuring all terminals or ones in the system that have low delay requirements.
  • the group terminal receives communication requirements for the same data information.
  • This embodiment describes the downlink unicast data information transmission by using the method provided by the present invention.
  • the base station needs to send a downlink unicast service to a terminal, where the data includes unicast data with low latency requirements and unicast data without low latency requirements.
  • the base station sends the fast message data carrying the downlink unicast data information with the low delay requirement (the fast message data may be a specific fast message, a paging message, a broadcast message corresponding to the scrambling of the dedicated RNTI, and the subsequent paging message is The example is described).
  • the paging message containing the downlink unicast service is sent, the paging message carries the downlink data information of the user, and carries the feedback indication information corresponding to the downlink data information.
  • the downlink data information ue-Data and the feedback indication information Feedback Indication are added to the Paging Record.
  • the terminal feedback acknowledgement/negative acknowledgement (ACK/NACK) information configured by the feedback indication information is that the terminal receives the demodulation correct feedback ACK, and receives the demodulation error feedback NACK, where the feedback indication information includes configuration information indicating the preamble corresponding to the ACK and the NACK, and simultaneously
  • the preamble is also used for the terminal to perform uplink random access.
  • the preamble which is equivalent to the ACK/NACK feedback on behalf of the terminal, has two functions. One is for feedback ACK/NACK to provide correct or erroneous feedback for fast downlink transmission so that the base station can get confirmation information, and the other is for uplink synchronization.
  • the preamble simultaneously sends a preamble to the base station for the first terminal in the random access procedure.
  • the information uses 6 bits to indicate one of the 64 preambles corresponding to the ACK, the next one corresponds to the NACK, and the 4 bit information indicates the PRACH MASK Index, indicating the subframe index to which it is transmitted;
  • the terminal receives the paging message at the paging moment capable of receiving the paging message, obtains the downlink user data sent by the base station by demodulating its own paging record message block according to the UE ID information, and obtains the feedback ACK/NACK and the random access preamble indication information.
  • the terminal receives the correct downlink user data, and feeds back the preamble representing the ACK and the random access on the subframe indicated by the base station.
  • the base station After receiving the preamble corresponding to the ACK fed back by the terminal, the base station stops sending the paging message containing the unicast service of the terminal. At the same time, the base station then sends a RAR message to the terminal and completes the uplink synchronization. Then, the base station sends the remaining unicast data without low delay requirement through scheduling.
  • the terminal can feedback whether the reception is correct when the uplink synchronization is not performed, so that the base station performs subsequent processing.
  • modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein.
  • the steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module.
  • the invention is not limited to any specific combination of hardware and software.
  • the downlink data transmission method, the receiving method, the sending device, and the receiving device provided by the embodiments of the present invention have the following beneficial effects: the problem that the downlink scheduling mode existing in the related art has a complicated process and a large delay is solved. Furthermore, the complexity of the process of reducing the downlink scheduling mode is reduced, and the effect of delay is reduced.

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  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé d'émission, procédé de réception, appareil d'émission et appareil de réception pour données de liaison descendante, le procédé d'émission pour données de liaison descendante comportant une étape lors de laquelle: lorsqu'il est nécessaire d'émettre un service de liaison descendante, une station de base émet directement un message rapide transportant des informations de données de liaison descendante. La présente invention résout les problèmes d'un processus complexe de mode de programmation de liaison descendante et d'un long retard existant dans la technique apparentée, ce qui a pour effet de réduire la complexité du processus de mode de programmation de liaison descendante et de raccourcir le retard.
PCT/CN2016/079094 2015-05-21 2016-04-12 Procédé d'émission, procédé de réception, appareil d'émission et appareil de réception pour données de liaison descendante WO2016184275A1 (fr)

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