WO2014086293A1 - Procédé et dispositif de transmission de données - Google Patents

Procédé et dispositif de transmission de données Download PDF

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Publication number
WO2014086293A1
WO2014086293A1 PCT/CN2013/088537 CN2013088537W WO2014086293A1 WO 2014086293 A1 WO2014086293 A1 WO 2014086293A1 CN 2013088537 W CN2013088537 W CN 2013088537W WO 2014086293 A1 WO2014086293 A1 WO 2014086293A1
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WIPO (PCT)
Prior art keywords
subframe
grant
downlink
uplink
radio frame
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PCT/CN2013/088537
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English (en)
Chinese (zh)
Inventor
林亚男
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电信科学技术研究院
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Publication of WO2014086293A1 publication Critical patent/WO2014086293A1/fr

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Classifications

    • 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
    • H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
    • 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
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1854—Scheduling and prioritising arrangements
    • 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
    • H04L1/1887—Scheduling and prioritising arrangements

Definitions

  • the present application relates to the field of communications, and in particular, to a data transmission method and apparatus. Background technique
  • a radio frame In the LTE (Long Term Evolution) system, a radio frame has a length of 10 ms, and a radio frame contains 10 subframes, and one subframe has a length of 1 ms.
  • TDD Time Division Duplex
  • seven TDD uplink/downlink subframe configurations are defined, as shown in Table 1; where D represents a DL (Downlink) subframe.
  • U represents a UL (UpLink, Uplink) subframe, and S represents a special subframe of the TDD system.
  • the special subframe consists of three parts: "DwPTS ((downlink pilot slot))” area, “GP (Guard Period)” area and “UpPTS (uplink pilot slot)” area, where DwPTS It is used to transmit the downlink primary synchronization signal and the normal downlink service data, the GP is the protection interval, the UpPTS transmits the uplink random access signal and the uplink detection signal, and the special subframe has multiple configurations, as shown in Table 2.
  • the special subframe can be regarded as a normal downlink subframe, and any downlink data service can be transmitted.
  • the DwPTS in a special subframe only occupies 3 OFDM symbols, only the downlink primary synchronization signal, the random access signal, and the uplink detection signal exist in the special subframe, that is, there is no downlink in the special subframe at this time. data transmission.
  • the uplink and downlink may be caused.
  • the cross interference between them is shown in Figure 1. Interference between the uplink and the downlink can seriously affect normal communication. To avoid this interference, a guard band needs to be reserved between the two working bands. The original agreement stipulated that no data transmission would take place within the guard band.
  • subframe 0 and subframe 5 are always downlink subframes
  • subframe 2 is always an uplink subframe
  • subframe 1 is always a special subframe, including: DwPTS (downlink pilot slot, used for downlink Transmission, length of at least 3 OFDM symbols), GP (Guard Interval) and UpPTS (uplink pilot time slot for uplink transmission, length of at least 1 OFDM symbol), at least the first 3 OFDM symbols in subframe 6 It is downlink.
  • DwPTS downlink pilot slot, used for downlink Transmission, length of at least 3 OFDM symbols
  • GP Guard Interval
  • UpPTS uplink pilot time slot for uplink transmission, length of at least 1 OFDM symbol
  • subframe 0 and subframe 5 are always downlink subframes
  • subframe 2 is always uplink subframe
  • subframe 1 and subframe The first 3 OFDM symbols of 6 are used for downlink transmission, and the last OFDM symbol of subframe 1 is used as UpPTS.
  • a new carrier type is defined in LTE Rel-11, which is recorded as NCT (New Carrier Type), and the traditional PDCCH is not transmitted in the NCT carrier (Physical Downlink Control Channel)
  • the physical downlink control channel may be an EPDCCH (Enhanced Physical Downlink Control Channel).
  • the NCT carrier performs data demodulation based on URS (UE-specific reference signals), does not transmit CRS (Cell-specific reference signals), or occupies one subframe every 5 ms to transmit CRS and transmits only CRS of a port.
  • the DwPTS when the DwPTS is 3 OFDM symbols, it is only used to transmit the PDCCH.
  • the PDCCH transmitted is mainly used to carry the UL grant (uplink scheduling signaling), and is not used to transmit the PDSCH (Physical Downlink Shared). Channel, physical downlink shared channel). If the above method is still used in the guard band, the resources in the guard band cannot be fully utilized because there is only one uplink subframe (ie, subframe 2) in the guard band, and only the first three in subframe 1 and subframe 6.
  • the OFDM symbol is used for downlink, the UL grant cannot be transmitted, and the PDSCH cannot be transmitted. Then most of the resources in subframe 1 and subframe 6 are completely wasted.
  • the embodiment of the present application provides a data transmission method and device for improving resource utilization in a frequency band.
  • a data transmission method includes:
  • a data transmission method in a frequency band comprising:
  • n 0 or 5;
  • the PDSCH is received on all OFDM symbols for PDSCH transmission and the first M OFDM symbols in subframe n+1 in the downlink subframe n, where M is a positive integer not greater than N, and N is a downlink The maximum number of OFDM symbols used for PDSCH transmission in a subframe.
  • a data transmission device includes:
  • a data transmission device includes:
  • a main control unit configured to receive, according to the received DL grant, all PDSCHs for the PDSCH transmission and the first M OFDM symbols in the subframe n+1 in the downlink subframe n, where M is not greater than N
  • M is not greater than N
  • N is the maximum number of OFDM symbols used for PDSCH transmission in the downlink subframe.
  • the OFDM symbols are used for PDSCH scheduling transmission together, wherein the DL grant and the UL grant are not transmitted in the subframe n+1, so that the resources in the subframe 1 and the subframe 6 can be fully utilized, and the resource waste is effectively avoided. Resource utilization.
  • FIG. 1 is a schematic diagram of interference between TDD uplink and downlink in the background art
  • FIG. 2 is a schematic diagram of a subframe configuration in a guard band under the background art
  • FIG. 3 is a flowchart of data transmission performed by a base station according to an embodiment of the present application
  • FIG. 4 is a schematic diagram of data scheduling by using a PDCCH in an embodiment of the present application.
  • FIG. 5 is a schematic diagram of resource scheduling by using an EPDCCH in the embodiment of the present application.
  • FIG. 6 is a flowchart of data transmission performed by a UE according to an embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of a first base station in an embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of a first UE function according to an embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of a function of a second base station in the embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of a function of a second UE in the embodiment of the present application. detailed description
  • a new data transmission method is designed in the embodiment of the present application, and the resources in the downlink subframe 1 and the downlink subframe 6 can be fully utilized.
  • the specific process of data transmission by the base station is as follows:
  • the DL grant sent by the base station passes the PDCCH (Physical Downlink Control) Channel, physical downlink control channel) transmission, as shown in FIG. 4; or, through EPDCCH (Enhanced Physical Downlink Control Channel), as shown in FIG. 5; or, in downlink subframe n; or The downlink subframe in the downlink subframe n is transmitted in the downlink subframe.
  • PDCCH Physical Downlink Control
  • EPDCCH Enhanced Physical Downlink Control Channel
  • Step 310 The base station transmits the PDSCH to the UE in the OFDM symbol for the PDSCH transmission and the first M OFDM symbols in the subframe n+1 in the downlink subframe n based on the transmitted DL grant, where M is not greater than N.
  • M is not greater than N.
  • N is the maximum number of OFDM symbols in the downlink subframe.
  • the subframe n is a downlink subframe n
  • the subframe n+1 may be a special subframe or a downlink subframe, and thus are respectively referred to as a downlink subframe.
  • Frame n and subframe n+l are respectively referred to as a downlink subframe.
  • the base station transmits the PDSCH to the UE using the same frequency band on the downlink subframe n and the subframe n+1.
  • the base station may transmit the PDSCH to the UE by using, but not limited to, the following two manners.
  • the first mode is: the base station encodes a TB (Transport Block) to obtain coding information, and maps the coding information to all OFDM symbols used for PDSCH transmission and the former M in subframe n+1 in the downlink subframe n. Transmission is performed on the OFDM symbols, that is, the PDSCH is transmitted to the UE through the OFDM symbol for the PDSCH transmission and the first M OFDM symbols in the subframe n+1 in the downlink subframe n in the joint coding manner.
  • a TB Transport Block
  • the UE determines, according to the N PRB , the TB size corresponding to the current PDSCH transmission, and the TB is mapped to all the OFDM symbols used for PDSCH transmission and the first M OFDM symbols in the subframe n+1 in the downlink subframe n.
  • N raB L RB x ”, 1 ⁇ A ⁇ 2
  • A is pre-agreed by the standard or pre-configured by the network side, preferably
  • the UE may determine, according to the modulation and coding level information/ MCS used by the current PDSCH allocated by the network side indicated in the UL grant, the modulation level and the TBS (Transport Block Size) index used for transmitting the PDSCH.
  • / TBS according to / TBS and N PRB further lookup table to know the number of data source bits of the currently scheduled PDSCH.
  • the size of the transport block is determined in this manner, and will not be described again.
  • the base station needs to receive the ACK/NAK (ACKnowledge/ Negative ACKnowledge) information fed back by the UE, preferably, but not limited to the following Any of three ways:
  • Mode A-1 The uplink subframe 2 of the base station in the radio frame m+1 receives the ACK/NAK information corresponding to the PDSCH transmission in the radio frame m fed back by the UE.
  • Mode A-2 If the first type of carrier that currently carries the PDSCH transmission (that is, the carrier that does not transmit the DL grant and the UL grant on the subframe n+1 (ie, subframe 1 and subframe 6)] is used as a secondary carrier and other Class 2 carrier (ie, can be in a subframe) n+1 (ie, subframe 1 and subframe 6) transmits the carrier of the DL grant and the UL grant], and the base station receives the ACK/NAK information corresponding to the PDSCH transmission in the first type of carrier fed back by the UE on the second type of carrier.
  • the first type of carrier that currently carries the PDSCH transmission that is, the carrier that does not transmit the DL grant and the UL grant on the subframe n+1 (ie, subframe 1 and subframe 6)
  • Class 2 carrier ie, can be in a subframe
  • n+1 ie, subframe 1 and subframe 6 transmits the carrier of the DL grant and the UL grant
  • the base station receives, on the uplink subframe n+1+k, all the OFDM symbols used for the PDSCH transmission and the first M OFDM symbols in the subframe n+1 in the downlink subframe n of the first type of carriers fed back by the UE.
  • the ACK/NAK information corresponding to the PDSCH where the uplink subframe n+1+k is an uplink subframe of the transmission ACK/NAK information corresponding to the subframe n+1 in the second type carrier, and k is a preset parameter.
  • the correspondence between n and k is as shown in Table 3.
  • Mode A-3 The base station receives, in the uplink subframe n+1+k, all the OFDM symbols used for the PDSCH transmission and the PDSCH corresponding to the transmission on the first M OFDM symbols in the subframe n+1 in the downlink subframe n fed back by the UE.
  • ACK/NAK information where the uplink subframe n+1+k is an uplink subframe of the transmission ACK/NAK information corresponding to the subframe n+1 of the carrier currently carrying the PDSCH transmission, k is a preset parameter, k and n The correspondence between them is also shown in Table 3.
  • the second mode is: the base station obtains the first coding information after encoding the first TB, and maps the first coding information to all OFDM symbols used for PDSCH transmission in the downlink subframe n, and obtains the second TB code. Second coding information, and mapping the second coding information to the first M OFDM symbols in the subframe n+1, that is, using the OFDM symbol and the subframe n for the PDSCH transmission in the downlink subframe n in an independent coding manner. The first M OFDM symbols in +1 transmit the PDSCH to the UE.
  • the data is divided into two parts P1 and P2, wherein P1 is independently coded and then mapped to sub-frame n for transmission, and P2 is independently coded and mapped to sub-frame n+1 for transmission.
  • the UE may be based on ⁇ ( ⁇ is the current indicated in the DL grant sent by the base station)
  • the number of PRBs occupied by the PDSCH transmission is determined by the first TB size corresponding to the PDSCH transmission in the downlink subframe n (that is, the P1 size), and the first TB is mapped to all the OFDM symbol uploads for the PDSCH transmission in the downlink subframe n.
  • the base station needs to receive feedback from the UE.
  • the ACK/NAK information may be, but is not limited to, any one of the following three methods:
  • Method B-1 The base station in the uplink subframe 2 of the radio frame m+1 receives the ACK/NAK information corresponding to the PDSCH transmission in the radio frame m fed back by the UE.
  • Method B-2 If the first type of carrier that currently carries the PDSCH transmission (that is, the carrier that does not transmit the DL grant and the UL grant on the subframe n+1 (ie, subframe 1 and subframe 6)] is used as the secondary carrier and the second type.
  • the carrier that is, the carrier of the DL grant and the UL grant may be transmitted in the subframe n+1 (ie, subframe 1 and subframe 6)], and the base station receives the PDSCH in the first type of carrier fed back by the UE on the second type of carrier.
  • the base station will receive the first TB corresponding to the OFDM symbol transmitted on the OFDM symbol for the PDSCH transmission in the downlink sub-frame n of the first type of carrier, which is received by the UE on the uplink subframe n+k.
  • ACK/NAK information on the uplink subframe n+1+k', the ACK corresponding to the second TB transmitted on the first M OFDM symbols in the downlink subframe n+1 of the first type of carrier is received.
  • uplink subframe n+k is an uplink subframe of the transmission ACK/NAK information corresponding to the downlink subframe n in the primary carrier
  • the uplink subframe n+1+k' is the downlink subframe in the primary carrier
  • the uplink subframe corresponding to the transmission ACK/NAK information corresponding to n+1, k and k' are preset parameters. The correspondence between it and k' is as shown in Table 3.
  • Method B-3 The base station will receive, on the uplink subframe n+k, the ACK/NAK information corresponding to the first TB transmitted by the UE to all the OFDM symbols used for PDSCH transmission in the downlink subframe n, in the uplink subframe
  • the ACK/NAK information corresponding to the second TB transmitted on the first M OFDM symbols in the downlink subframe n+1 in the first type of carrier is received on the frame n+1+k', where the uplink subframe is received.
  • the n+k is the uplink subframe of the ACK/NAK information corresponding to the downlink subframe n in the carrier that carries the PDSCH transmission
  • the uplink subframe n+1+k' is the downlink subframe n+1 of the carrier that is currently carrying the PDSCH transmission.
  • the corresponding uplink subframe for transmitting ACK/NAK information, k and k' are preset parameters, and the correspondence between n and k, k' is as shown in Table 3.
  • the UE does not receive the DL grant and the UL grant that are sent by the base station in the subframe 1 and the subframe 6. Then, in the embodiment of the present application, the base station may adopt the DL grant and the UL grant. However, it is not limited to the following methods to issue a UL grant:
  • the base station transmits the UL grant corresponding to the PUSCH transmission in the uplink subframe 2 in the radio frame m and the downlink sub-frame in the radio frame m+1 in the downlink subframe 5 in the radio frame m-1.
  • the ACK/NAK information corresponding to the PUSCH transmission in the uplink subframe 2 in the radio frame m is transmitted.
  • the base station transmits the PUSCH transmission in the uplink subframe 7 and the uplink subframe 8 in the radio frame m in the downlink subframe 0 in the radio frame m.
  • the UL grant corresponding to the PUSCH transmission in the uplink subframe 2 and the uplink subframe 3 in the radio frame m is transmitted in the downlink subframe 5 in the radio frame m-1.
  • the other uplink subframes send the UL grant according to the existing scheduling timing relationship
  • the specific parameter table 4 shows that the PUSCH transmission in each uplink subframe receives the ACK/NAK information fed back by the UE according to the existing feedback timing. 5 is shown.
  • the base station transmits the UL grant corresponding to the PUSCH transmission in the uplink subframe 7 in the radio frame m in the downlink subframe 0 in the radio frame m;
  • the UL grant corresponding to the PUSCH transmission in the uplink subframe 2 in the radio frame m is transmitted in the downlink subframe 5 in the radio frame m-1.
  • the other uplink subframes send the UL grant according to the existing scheduling timing relationship
  • the specific parameter table 4 shows that the PUSCH transmission in each uplink subframe receives the ACK/NAK information fed back by the UE according to the existing feedback timing. 5 is shown.
  • the base station transmits the UL grant corresponding to the PUSCH transmission in the uplink subframe 8 in the radio frame m in the downlink subframe 0 in the radio frame m;
  • the UL grant corresponding to the PUSCH transmission in the uplink subframe 3 in the radio frame m is transmitted in the downlink subframe 5 in the radio frame m-1.
  • the other uplink subframes send the UL grant according to the existing scheduling timing relationship, and the specific parameter table 4 shows that the PUSCH transmission in each uplink subframe receives the ACK/NAK information fed back by the UE according to the existing feedback timing. 5 is shown.
  • the UL grant When the UL grant is transmitted according to the timing relationship described in the above four cases, multi-subframe scheduling is required (that is, the UL grant corresponding to multiple uplink subframes is transmitted in the same downlink subframe). In this case, the UL grant needs to add subframes.
  • the indication information is used to indicate which uplink subframe or subframes the current UL grant specifically schedules.
  • the specific process for the UE to perform data transmission in the frequency band is as follows:
  • the UE receives the DL grant sent by the base station by using the PDCCH, as shown in FIG. 4, or receives the DL grant sent by the base station by using the EPDCCH, as shown in FIG. 5; or, in the downlink subframe n.
  • Step 610 The UE receives the PDSCH in the OFDM symbol for the PDSCH transmission and the first M OFDM symbols in the subframe n+1 in the downlink subframe n based on the received DL grant, where M is a positive integer not greater than N. N is the maximum number of OFDM symbols in the downlink subframe.
  • subframe n is a downlink subframe n
  • subframe n+1 may be a special subframe or a downlink subframe, and thus is referred to as a downlink subframe.
  • step 610 the UE receives the PDSCH using the same frequency band on the downlink subframe n and the subframe n+1.
  • the corresponding UE can determine the TB size in the PDSCH transmission by using, but not limited to, the following two manners.
  • the UE feeds back the ACK/NAK to the base station, which may be, but is not limited to, any one of the following three methods:
  • Mode C-1 The UE transmits an ACK/NAK information corresponding to the PDSCH transmission in the radio frame m to the base station in the uplink subframe 2 of the radio frame m+1.
  • Mode C-2 If the first type of carrier that currently carries the PDSCH transmission (ie, in subframe n+1 (ie, subframe 1 and subframe 6) A carrier that does not transmit DL grant and UL grant] acts as a secondary carrier and other second type of carriers (ie, carriers that can transmit DL grant and UL grant in subframes n+1 (ie, subframe 1 and subframe 6)] And the UE feeds back the ACK/NAK information corresponding to the PDSCH transmission in the first type of carrier on the second type of carrier, and the UE feeds back the first type of intra-carrier downlink sub-frame n to the base station in the uplink subframe n+1+k.
  • the first type of carrier that currently carries the PDSCH transmission ie, in subframe n+1 (ie, subframe 1 and subframe 6)
  • a carrier that does not transmit DL grant and UL grant acts as a secondary carrier and other second type of carriers (ie, carriers that can transmit DL grant and UL grant
  • the uplink subframe corresponding to the transmission ACK/NAK information corresponding to n+1, k is a preset parameter.
  • the correspondence between n and k is as shown in Table 3.
  • Mode C-3 The UE feeds back, to the base station, all the OFDM symbols used for PDSCH transmission in the downlink subframe n and the PDSCH transmitted on the first M OFDM symbols in the subframe n+1 in the uplink subframe n+1+k.
  • ACK/NAK information where the uplink subframe n+1+k is an uplink subframe of the transmission ACK/NAK information corresponding to the subframe n+1 of the carrier currently carrying the PDSCH transmission, where k is a preset parameter, k and n
  • Table 3 The correspondence between the two is also shown in Table 3.
  • P2 size a second TB size
  • the UE needs to feed back ACK/NAK information to the network side.
  • the UE may use one of the following three methods:
  • Method D-1 The UE forwards the ACK/NAK information corresponding to the PDSCH transmission in the radio frame m to the base station in the uplink subframe 2 in the radio frame m+1.
  • Method D-2 If the first type of carrier that currently carries the PDSCH transmission (that is, the carrier that does not transmit the DL grant and the UL grant on the subframe n+1 (ie, subframe 1 and subframe 6)] is used as the secondary carrier and the second type.
  • the carrier that is, the carrier of the DL grant and the UL grant may be transmitted in the subframe n+1 (ie, the subframe 1 and the subframe 6)], and the UE feeds back the PDSCH transmission in the first type of carrier on the second type of carrier.
  • the UE will feed back the ACK/NAK corresponding to the first TB transmitted on all OFDM symbols for PDSCH transmission in the downlink subframe n of the first type of carrier to the base station on the uplink subframe n+k.
  • the ACK/NAK information corresponding to the second TB transmitted on the first M OFDM symbols in the downlink subframe n+1 of the first type of carrier is fed back to the base station, where
  • the uplink subframe n+k is an uplink subframe of the transmission ACK/NAK information corresponding to the downlink subframe n in the primary carrier
  • the uplink subframe n+l+k' is an uplink subframe for transmitting ACK/NAK information corresponding to the downlink subframe n+1 in the second type carrier
  • k and k' are preset parameters, and the correspondence between 0 and k' is specific as shown in Table 3
  • Method D-3 The UE feeds back, on the uplink subframe n+k, ACK/NAK information corresponding to the first TB transmitted on all OFDM symbols used for PDSCH transmission in the downlink subframe n, in the uplink subframe n.
  • the +1+k' is forwarded to the base station and is mapped to the ACK/NAK information corresponding to the second TB transmitted on the first M OFDM symbols in the downlink subframe n+1, where the uplink subframe n+k is the current bearer PDSCH transmission.
  • the uplink subframe of the ACK/NAK information corresponding to the downlink subframe n in the carrier, and the uplink subframe n+1+k' is the transmission ACK/NAK information corresponding to the downlink subframe n+1 of the carrier currently carrying the PDSCH transmission.
  • the uplink subframe, k and k' are preset parameters, and the correspondence between n and k, k' is as shown in Table 3.
  • the UE does not receive the DL grant and the DL grant sent by the base station side in the subframe 1 and the subframe 6.
  • the UE may receive the UL grant by using, but not limited to, the following method:
  • the UE receives the intra-radio frame m in the uplink subframe 2 in the downlink subframe 5 in the radio frame m-1.
  • the UE receives the PUSCH transmission in the uplink subframe ⁇ and the uplink subframe 8 in the radio frame m in the downlink subframe 0 in the radio frame m.
  • the PUSCH transmits the corresponding UL grant.
  • the other uplink subframes receive the UL grant according to the existing scheduling timing relationship, and the specific parameter table 4 shows that the PUSCH transmission in each uplink subframe feeds back ACK/NAK information to the base station according to the existing feedback timing. Shown.
  • the UE receives the UL grant corresponding to the PUSCH transmission in the uplink subframe 7 in the radio frame m in the downlink subframe 0 of the radio frame m;
  • the UL grant corresponding to the PUSCH transmission in the uplink subframe 2 in the radio frame m is received in the downlink subframe 5 in the radio frame m-1.
  • the other uplink subframes receive the UL grant according to the existing scheduling timing relationship, and the specific parameter table 4 shows that the PUSCH transmission in each uplink subframe feeds back ACK/NAK information to the base station according to the existing feedback timing. Shown.
  • the UE receives the UL grant corresponding to the PUSCH transmission in the uplink subframe 8 in the radio frame m in the downlink subframe 0 of the radio frame m;
  • the UL grant corresponding to the PUSCH transmission in the uplink subframe 3 in the radio frame m is received in the downlink subframe 5 in the radio frame m-1.
  • the other uplink subframes receive the UL grant according to the existing scheduling timing relationship, and the specific parameter table 4 shows that the PUSCH transmission in each uplink subframe feeds back ACK/NAK information to the base station according to the existing feedback timing. Shown.
  • multi-subframe scheduling that is, the UL grant corresponding to multiple uplink subframes is transmitted in the same downlink subframe
  • the UE needs to be added according to the UL grant.
  • the subframe indication information distinguishes which one or which uplink subframes the current UL grant specifically schedules.
  • the base station includes a communication unit 70 and a processing unit 71, where
  • the processing unit 71 is configured to transmit, according to the transmitted DL grant, the PDSCH to the UE in all the OFDM symbols for the PDSCH transmission and the first M OFDM symbols in the subframe n+1 in the downlink subframe n, where M is not greater than A positive integer of N, where N is the maximum number of OFDM symbols in the downlink subframe.
  • the communication unit 70 transmits the DL grant through the PDCCH; or transmits the DL grant through the EPDCCH; or transmits the DL grant in the downlink subframe n; or, the DL grant is in the downlink subframe n
  • the previous downlink subframe is transmitted.
  • the processing unit 71 transmits the PDSCH to the UE through the same frequency band on the downlink subframe n and the subframe n+1.
  • the processing unit 71 obtains coding information by encoding one TB, and maps the coding information to all OFDM symbols used for PDSCH transmission in the downlink subframe n and the first M OFDM symbols in the subframe n+1 for transmission; or Encoding the first TB to obtain the first coding information, and mapping the first coding information to all OFDM symbols used for PDSCH transmission in the downlink subframe n for transmission; and encoding the second TB to obtain the second coding information, The second coding information is mapped to the first M OFDM symbols in the subframe n+1 for transmission.
  • the communication unit 70 is further configured to:
  • the uplink subframe 2 in the radio frame m+1 receives the correct response command/error response command ACK/NAK information corresponding to the PDSCH transmission in the radio frame m fed back by the UE; or
  • the NAK information where the uplink subframe n+1+k is an uplink subframe of the transmission ACK/NAK information corresponding to the subframe n+1, where k is a preset parameter; or
  • ACK/NAK information corresponding to the first TB transmitted on the OFDM symbol where the uplink subframe n+k is the downlink subframe n
  • Corresponding uplink subframe for transmitting ACK/NAK information k is a preset parameter
  • the uplink M subframe receives the mapping of the UE feedback to the pre-M in the subframe n+1 on the uplink subframe n+1+k′
  • the communication unit 70 is further configured to:
  • the uplink scheduling signaling UL grant corresponding to the PUSCH transmitted in the uplink subframe 2 in the radio frame m is transmitted in the downlink subframe 5 in the radio frame m-1, and in the downlink subframe 1 in the radio frame m+1. Transmitting ACK/NAK information corresponding to the PUSCH transmitted in the uplink subframe 2 in the radio frame m;
  • the carrier transmitting the UL grant adopts the TDD uplink and downlink configuration 0
  • the UL grant corresponding to the PUSCH transmitted in the uplink subframe 7 and the uplink subframe 8 in the radio frame m is transmitted in the downlink subframe 0 in the radio frame m, in the wireless
  • the downlink grant 5 in the frame m-1 transmits the UL grant corresponding to the PUSCH transmitted in the uplink subframe 2 and the uplink subframe 3 in the radio frame m; or
  • the carrier transmitting the UL grant adopts the TDD uplink and downlink configuration 1
  • the UL grant corresponding to the PUSCH transmitted in the uplink subframe 7 in the radio frame m is transmitted in the downlink subframe 0 of the radio frame m, and is in the radio frame m-1.
  • the UL grant corresponding to the PUSCH transmitted in the uplink subframe 2 in the radio frame m is transmitted; or
  • the carrier transmitting the UL grant adopts the TDD uplink and downlink configuration 6
  • the UL grant corresponding to the PUSCH transmitted in the uplink subframe 8 in the radio frame m is transmitted in the downlink subframe 0 of the radio frame m, and is in the radio frame m-1.
  • the UL grant corresponding to the PUSCH transmitted in the uplink subframe 3 in the radio frame m is transmitted.
  • the UE includes a communication unit 80 and a main control unit 81, where the communication unit 80 is configured to receive a DL grant sent by the network side, where the DL grant is used to schedule the downlink subframe n.
  • n 0 or 5;
  • the main control unit 81 is configured to receive, according to the received DL grant, all PDSCHs for the PDSCH transmission and the first M OFDM symbols of the subframe n+1 in the downlink subframe n, where M is not greater than N A positive integer, N is the maximum number of OFDM symbols used for PDSCH transmission in the downlink subframe.
  • the communication unit 80 receives the DL grant through the PDCCH; or
  • the main control unit 81 receives the PDSCH through the same frequency band on the downlink subframe n and the subframe n+1.
  • the main control unit 81 determines the number N′ of resource blocks occupied by the current PDSCH transmission based on the received DL grant, and determines the size of the TB according to the N B , and the TB is mapped to all OFDM for the PDSCH transmission in the downlink subframe n.
  • the symbol and the transmission of the first M OFDM symbols in the subframe n+1, where N PJ3 ⁇ 4 L RB x ⁇ 4", 1 ⁇ A ⁇ 2, pre-agreed by the standard or pre-configured by the network side; or, based on the received DL
  • the grant determines the number N of resource blocks occupied by the current PDSCH transmission, and determines the first TB size according to ⁇ , the first TB is mapped to all OFDM symbols used for PDSCH transmission in the downlink subframe n; and according to ⁇ +, Determining the size of the second frame, the second frame is mapped to the subframe n+1
  • A' is pre-agreed by the standard or pre-configured by the network side.
  • the communication unit 80 is further used to:
  • the uplink subframe 2 in the radio frame m+1 feeds back to the network side the correct answer command/error response command ACK/NAK information corresponding to all PDSCHs in the radio frame m; or
  • All the signals in the downlink subframe n for PDSCH transmission are fed back to the network side on the uplink subframe n+1+k.
  • the ACK/NAK information corresponding to the first TB transmitted on all OFDM symbols used for PDSCH transmission in the downlink subframe n is fed back to the network side on the uplink subframe n+k, where the uplink subframe n+k
  • k is a preset parameter
  • the uplink subframe is fed back to the network side to the subframe n+ on the uplink subframe n+1+k' 1 ACK/NAK information corresponding to the second TB transmitted on the first M OFDM symbols, where the uplink subframe n+ 1 + k′ is the uplink subframe of the transmission ACK/NAK information corresponding to the downlink subframe n+ 1 , k′ Preset parameters.
  • the communication unit 80 is further used to:
  • the carrier transmitting the UL grant adopts the TDD uplink and downlink configuration 0
  • the UL grant corresponding to the PUSCH transmitted in the uplink subframe 7 and the uplink subframe 8 in the radio frame m is received in the downlink subframe 0 in the radio frame m, in the wireless
  • the downlink grant 5 in the frame m-1 receives the UL grant corresponding to the PUSCH transmitted in the uplink subframe 2 and the uplink subframe 3 in the radio frame m; or
  • the carrier transmitting the UL grant adopts the TDD uplink and downlink configuration 1
  • the UL grant corresponding to the PUSCH transmitted in the uplink subframe 7 in the radio frame m is received in the downlink subframe 0 in the radio frame m, and is in the radio frame m-1.
  • the downlink sub-frame 5 receives the UL grant corresponding to the PUSCH transmitted in the uplink subframe 2 in the radio frame m; or If the carrier transmitting the UL grant adopts the TDD uplink and downlink configuration 6, the UL grant corresponding to the PUSCH transmitted in the uplink subframe 8 in the radio frame m is received in the downlink subframe 0 in the radio frame m, and is in the radio frame m-1.
  • the downlink subframe 5 receives the UL grant corresponding to the PUSCH transmitted in the uplink subframe 3 in the radio frame m.
  • the second base station in this embodiment of the present application includes:
  • the OFDM symbol for the PDSCH transmission and the first M OFDM symbols in the subframe n+1 are transmitted by the transceiver 910 to the UE, where M is a positive integer not greater than N, and N is an OFDM symbol in the downlink subframe.
  • the maximum number; the transceiver 910 is configured to send and receive data under the control of the processor 900.
  • the processor 900 is specifically configured to: transmit the DL grant by using a PDCCH; or transmit the DL grant by using an EPDCCH; or transmit the DL grant in a downlink subframe n; or The downlink subframe in the downlink subframe n is transmitted in the downlink subframe.
  • the processor 900 is specifically configured to: control the transceiver 910 to transmit the PDSCH to the UE through the same frequency band on the downlink subframe n and the subframe n+1.
  • the processor 900 is specifically configured to: control the transceiver 910 to encode one TB to obtain coding information, and map the coding information to all OFDM symbols used for PDSCH transmission and the first M OFDM in subframe n+1 in the downlink subframe n. Transmission is performed on the symbol; or, the control transceiver 910 encodes the first TB to obtain the first coding information, and maps the first coding information to all OFDM symbols used for PDSCH transmission in the downlink subframe n for transmission; The second TB is encoded to obtain second encoding information, and the second encoding information is mapped to the first M OFDM symbols in the subframe n+1 for transmission.
  • the processor 900 is specifically configured to: control the transceiver 910 to receive the correct response command/error response command ACK/NAK information corresponding to the PDSCH transmission in the radio frame m fed back by the UE in the uplink subframe 2 in the radio frame m+1; or The control transceiver 910 receives, on the uplink subframe n+1+k, all the OFDM symbols for the PDSCH transmission and the PDSCH transmitted on the first M OFDM symbols in the subframe n+1 in the downlink subframe n fed back by the UE.
  • Corresponding ACK/NAK information where the uplink subframe n+1+k is an uplink subframe of the transmission ACK/NAK information corresponding to the subframe n+1, and k is a preset parameter; or
  • the control transceiver 910 receives, on the uplink subframe n+k, the ACK/NAK information corresponding to the first TB transmitted on the OFDM symbol for the PDSCH transmission in the downlink subframe n, which is fed back by the UE, where the uplink subframe
  • the frame n+k is an uplink subframe for transmitting ACK/NAK information corresponding to the downlink subframe n, where k is a preset parameter
  • the uplink subframe receives the mapping of the UE feedback on the uplink subframe n+1+k′ to ACK/NAK information corresponding to the second TB transmitted on the first M OFDM symbols in the subframe n+1, where the uplink subframe n+1+k' is the transmission ACK/NAK signal corresponding to the subframe n+1
  • the uplink subframe of the interest, k' is the preset parameter.
  • the processor 900 is specifically configured to: control, by the transceiver 910, the uplink scheduling signaling UL grant corresponding to the PUSCH transmitted in the uplink subframe 2 in the radio frame m in the downlink subframe 5 in the radio frame m-1, and in the wireless
  • the downlink subframe 1 in the frame m+1 transmits the ACK/NAK information corresponding to the PUSCH transmitted in the uplink subframe 2 in the radio frame m. If the carrier transmitting the UL grant adopts the TDD uplink and downlink configuration 0, the transceiver 910 is controlled.
  • the control transceiver 910 transmits the UL grant corresponding to the PUSCH transmitted in the uplink subframe ⁇ in the radio frame m in the downlink subframe 0 of the radio frame m, in the radio frame.
  • the downlink subframe 5 in the m-1 transmits the UL grant corresponding to the PUSCH transmitted in the uplink subframe 2 in the radio frame m; or if the carrier transmitting the UL grant adopts the TDD uplink and downlink configuration 6, the transceiver 910 is controlled to be wireless.
  • the UL grant corresponding to the PUSCH transmitted in the uplink subframe 8 in the radio frame m is transmitted in the downlink subframe 0 in the frame m, and is transmitted in the uplink subframe 3 in the radio frame m in the downlink subframe 5 in the radio frame m-1.
  • the UL grant corresponding to the transmitted PUSCH is transmitted in the downlink subframe 0 in the frame m, and is transmitted in the uplink subframe 3 in the radio frame m in the downlink subframe 5 in the radio frame m-1.
  • the bus architecture may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 900 and various circuits of memory represented by memory 920.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • the bus interface provides an interface.
  • Transceiver 910 can be a plurality of components, including a transmitter and a receiver, providing means for communicating with various other devices on a transmission medium.
  • the processor 900 is responsible for managing the bus architecture and general processing, and the memory 920 can store data used by the processor 900 in performing operations.
  • the processor 900 is responsible for managing the bus architecture and general processing, and the memory 920 can store data used by the processor 900 in performing operations.
  • the second UE in this embodiment of the present application includes:
  • the transceiver 1010 is configured to send and receive data under the control of the processor 1000.
  • the processor 1000 is specifically configured to: control the transceiver 1010 to receive the DL grant by using a PDCCH; or Receiving the DL grant by using the EPDCCH; or receiving the DL grant in the downlink subframe n; or receiving the DL grant in a downlink subframe before the downlink subframe n.
  • the processor 1000 is specifically configured to: control the transceiver 1010 to receive the PDSCH through the same frequency band on the downlink subframe n and the subframe n+1.
  • the processor 1000 is specifically configured to: determine, according to the received DL grant, the number of resource blocks occupied by the current PDSCH transmission.
  • N M the TB is mapped to all OFDM symbols used for PDSCH transmission and the first M OFDM symbols in subframe n+1 in the downlink subframe n
  • ⁇ ' is pre-agreed by the standard or pre-configured by the network side.
  • the processor 1000 is specifically configured to: control the transceiver 1010 to feed back the correct response command/error response command ACK/NAK information corresponding to all PDSCHs in the radio frame m to the network side in the uplink subframe 2 in the radio frame m+1; or The control transceiver 1010 feeds back to the network side in the uplink subframe n+1+k that all of the data in the downlink subframe n is used for
  • ACK/NAK information corresponding to the PDSCH transmitted on the PDSCH and the PDSCH transmitted on the first M OFDM symbols of the downlink subframe n+1, where the uplink subframe n+1+k is the transmission ACK corresponding to the subframe n+1.
  • the uplink subframe of the NAK information where k is a preset parameter; or
  • the control transceiver 1010 feeds back, to the network side, the ACK/NAK information corresponding to the first TB transmitted on all OFDM symbols used for PDSCH transmission in the downlink subframe n on the uplink subframe n+k, where the uplink subframe
  • the frame n+k is an uplink subframe for transmitting ACK/NAK information corresponding to the downlink subframe n, where k is a preset parameter; and the uplink subframe is fed back to the network side on the uplink subframe n+1+k′ ACK/NAK information corresponding to the second TB transmitted on the first M OFDM symbols in the subframe n+1, where the uplink subframe n+1+k' is the transmission ACK/NAK information corresponding to the downlink subframe n+1
  • the uplink subframe, k' is a preset parameter.
  • the processor 1000 is specifically configured to: control, by the transceiver 1010, the uplink scheduling signaling UL grant corresponding to the PUSCH transmitted in the uplink subframe 2 in the radio frame m in the downlink subframe 5 in the radio frame m-1, and in the wireless
  • the downlink subframe 1 in the frame m+1 receives the ACK/NAK information corresponding to the PUSCH transmitted in the uplink subframe 2 in the radio frame m; or
  • the control transceiver 1010 receives the PUSCH transmitted in the uplink subframe 7 and the uplink subframe 8 in the radio frame m in the downlink subframe 0 in the radio frame m.
  • UL grant Receiving, in the downlink subframe 5 in the radio frame m-1, the UL grant corresponding to the PUSCH transmitted in the uplink subframe 2 and the uplink subframe 3 in the radio frame m; or
  • the control transceiver 1010 receives the UL grant corresponding to the PUSCH transmitted in the uplink subframe 7 in the radio frame m in the downlink subframe 0 of the radio frame m, in the wireless
  • the downlink subframe 5 in the frame m-1 receives the UL grant corresponding to the PUSCH transmitted in the uplink subframe 2 in the radio frame m; or, if the carrier transmitting the UL grant adopts the TDD uplink and downlink configuration 6, the control transceiver 1010 is The downlink subframe 0 in the radio frame m receives the UL grant corresponding to the PUSCH transmitted in the uplink subframe 8 in the radio frame m, and receives the uplink subframe 3 in the radio frame m in the downlink subframe 5 in the radio frame m-1.
  • the bus architecture can include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 1000 and various circuits of memory represented by memory 1020.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • the bus interface provides an interface.
  • Transceiver 1010 can be a plurality of components, including a transmitter and a receiver, providing means for communicating with various other devices on a transmission medium.
  • the user interface 1030 may also be an interface capable of externally connecting the required devices, including but not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.
  • the processor 1000 is responsible for managing the bus architecture and the usual processing, and the memory 1020 can store data used by the processor 1000 in performing operations.
  • embodiments of the present application can be provided as a method, system, or computer program product.
  • the application can take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware.
  • the application can be in the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) in which computer usable program code is embodied.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

Abstract

Cette demande concerne le domaine des communications. Un procédé et un dispositif de transmission de données sont décrits. Le procédé consiste à : reconcevoir une manière de transmettre des données, à savoir, quand n = 0 ou 5, effectuer une transmission de planification PDSCH par utilisation de M premiers symboles OFDM dans une sous-trame n+1 à titre de ressources de liaison descendante conjointement avec tous les symboles OFDM utilisés pour une transmission PDSCH dans une sous-trame n, et ne pas transmettre un octroi BL et un octroi DL dans la sous-trame n+1. De cette manière, des ressources dans une sous-trame 1 et une sous-trame 6 sont entièrement utilisées, ce qui évite un gaspillage de ressources tout en améliorant efficacement l'utilisation des ressources.
PCT/CN2013/088537 2012-12-07 2013-12-04 Procédé et dispositif de transmission de données WO2014086293A1 (fr)

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