WO2012068953A1 - 中继链路子帧配置切换时确认信息的反馈方法及装置 - Google Patents

中继链路子帧配置切换时确认信息的反馈方法及装置 Download PDF

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Publication number
WO2012068953A1
WO2012068953A1 PCT/CN2011/081943 CN2011081943W WO2012068953A1 WO 2012068953 A1 WO2012068953 A1 WO 2012068953A1 CN 2011081943 W CN2011081943 W CN 2011081943W WO 2012068953 A1 WO2012068953 A1 WO 2012068953A1
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Prior art keywords
uplink
handover
ack
subframe
nack information
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PCT/CN2011/081943
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English (en)
French (fr)
Inventor
毕峰
杨瑾
梁枫
袁明
吴栓栓
袁弋非
苟伟
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中兴通讯股份有限公司
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Priority to US13/989,136 priority Critical patent/US9119191B2/en
Publication of WO2012068953A1 publication Critical patent/WO2012068953A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements 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
    • H04L1/18Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829Arrangements specially adapted for the receiver end
    • H04L1/1854Scheduling and prioritising arrangements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements 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
    • H04L1/18Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829Arrangements specially adapted for the receiver end
    • H04L1/1861Physical mapping arrangements

Definitions

  • FIG. 1 is a schematic diagram of a system according to the related art. After a RN (Relay Node) is introduced in an LTE-A (Long Term Evolution Advanced) system, a new link is added, and the corresponding term is used.
  • the link between the eNB (eNode-B, the Node B or the base station) and the RN is called a backhaul link (backhaul link or relay link), and the link between the RN and the user equipment (UE).
  • the link between the eNode-B and the UE, called the access link, is called the direct link.
  • the inband-relay is the eNode-B to relay link and the relay-to-UE link operates on the same frequency resource. Since the inband-relay transmitter will interfere with its own receiver (self-interference), it is impossible for the eNode-B to relay link and the relay-to-UE link to be on the same frequency resource at the same time unless there is enough Signal separation and antenna isolation. Similarly, it is also impossible for the relay to transmit to the eNode-B while receiving the data transmitted by the UE.
  • One possible method for solving the problem of transmitting and receiving interference is to: make the relay not transmit to the UE when receiving data from the eNode-B, that is, after the relay to the UE link, it is necessary to add "gap" (gap), Configure MBSFN (Multicast Broadcast Single Frequency Network) subframe (subframe) for backhaul subframe, so that the UE does not perform any receiving/transmitting operation in the "gap" time range, and Relay is in "gap” time.
  • the handover from transmission to reception is completed in the range, and the data from the eNB is received in the following OFDM (Orthogonal Frequency Division Multiplexing) symbol after the handover is completed.
  • OFDM Orthogonal Frequency Division Multiplexing
  • MCE MBS Control Entity
  • the available MBSFN subframe is configured for the eNode-B.
  • the eNode-B then configures the available backhaul subframes in these available MBSFN subframes.
  • 2 is a schematic diagram of a frame structure according to the related art.
  • a 10 ms radio frame is composed of 10 1 ms subframe subframes, which may include Unicast (unicast) and Multicast Broadcast (multicast broadcast).
  • the subframe has the special purpose described above, and therefore cannot be used for the allocation of the MBSFN subframe, that is, the MBSFN subframe that can be allocated in one radio frame is at most 6 subframes.
  • the transmission of data between the user equipment and the base station needs to establish a HARQ (Hybrid Automatic Repeat Request) process and perform corresponding feedback.
  • HARQ Hybrid Automatic Repeat Request
  • the user equipment After the user equipment receives the data of the base station, the user equipment generates uplink feedback information (for example, uplink ACK/NACK) according to the decoding situation, and sends the information to the base station. Then, the base station performs the next processing according to the received information.
  • uplink feedback information for example, uplink ACK/NACK
  • the design of the uplink HARQ mainly includes the combination of the lower uplink subframes using only 8ms or 16ms multiples, that is, it is assumed that within the range of 40ms, the 8 sets of the downlink subframes include ⁇ (#7 #23 #31), (#6 # 22 #38), (#13 #21 #37), (#12 #28 #36), (#3 #11 #27), (#2 #18 #26) (#1 #17 #33), ( #8 #16 #32) ⁇ ,
  • the corresponding 8 sets of uplink subframes include ⁇ (#11 #27 #35), (#10 #26 #42), (#17 #25 #41), (#16 # 32 #40), (#7 #15 #31), (#6 #22 #30), (#5 #21 #37), (#12 #20 #36) ⁇ , where, the child larger than "40"
  • one downlink subframe set corresponds to one uplink subframe set, that is, from the overall uplink subframe set, a total of eight lower uplink subframe sets, and different sets are combined.
  • the 8th power combination of 2 (ie, 256 combinations). Since there will be a corresponding uplink subframe after the downlink subframe interval is 4 ms, the feedback of the uplink ACK/NACK may not need to be modified like LTE, but when the subframe configuration is switched, the corresponding combination is configured. The relationship between the uplink subframe and the downlink subframe before handover may no longer satisfy the 4 ms relationship.
  • the set index is as shown in Table 1. It should be noted that the set and the set index are not limited to the correspondence shown in Table 1. There is an 8-bit bitmap (bit map) mode when sub-frame allocation is performed, that is, 8 bits.
  • bits of (bits) respectively correspond to different set indexes, and the receiving end acquires the subframe configuration as long as the set index is acquired.
  • Table 1 The bits of (bits) respectively correspond to different set indexes, and the receiving end acquires the subframe configuration as long as the set index is acquired.
  • the number of HARQ processes corresponding to 256 combinations is as shown in Table 2.
  • the combination configuration in the first column uses decimal. For example, “170” indicates that the binary of 8 bits is “10101010", which represents the set. The collections with indexes "7", "5", "3", and "1" are combined. Table 2
  • the present invention provides a feedback scheme for determining the uplink ACK/NACK when the relay link subframe configuration is switched.
  • a method for feeding back acknowledgment information when a relay link subframe configuration is switched includes: if one or more downlink hybrid automatic repeat request is performed during a relay link subframe configuration switchover
  • the uplink ACK/NACK information corresponding to the last transmission of the HARQ transmission before the handover is not fed back in the uplink subframe before the handover, and the ACK is fed back on the available uplink subframe after the last transmission after N milliseconds.
  • N is an integer.
  • the available uplink subframe after handover is the first available uplink subframe after N milliseconds after the last transmission.
  • N 4.
  • the uplink ACK/NACK information corresponding to the last transmission of the multiple downlink HARQ transmissions before the handover is fed back on the same uplink subframe after the handover.
  • the uplink ACK/NACK information that is not fed back on the uplink subframe before the handover and the one or more downlink HARQ transmissions after the handover of the downlink transmission of the one or more downlink HARQ transmissions before the handover The corresponding uplink ACK/NACK information is fed back on the same uplink subframe after handover.
  • the uplink ACK/NACK information corresponding to the last transmission of the different HARQ transmissions before the handover is fed back on the different uplink subframes after the handover.
  • the feedback manner of the uplink ACK/NACK information is the same as any of the feedback manners of the uplink ACK/NACK information in the Long Term Evolution (LTE) and the Advanced Long Term Evolution (LTE) system.
  • the feedback mode of the uplink ACK/NACK information is at least one of the following: Format format 1/1 a/lb: The uplink ACK/NACK information to be fed back is spread on the corresponding resource after being spread in the frequency and time directions.
  • format 2/2a/2b The uplink ACK/NACK information to be fed back is fed back on the resource corresponding to the orthogonal frequency division multiplexing OFDM symbol of the demodulation reference symbol DMRS; format 3: uplink ACK/NACK to be fed back After the information is spread in the time direction, it is carried on the corresponding resource for feedback.
  • a feedback apparatus for confirming information when a relay link subframe configuration is switched includes: a determining module, configured to determine one or more when a relay link subframe configuration switchover The uplink ACK/NACK information corresponding to the last transmission of the downlink hybrid automatic repeat request HARQ transmission is not fed back in the uplink subframe before the handover; the feedback module is set to be available after N milliseconds after the last transmission. The ACK/NACK information is fed back on the switched uplink subframe, where N is an integer.
  • the feedback module is configured to feed back ACK/NACK information on the first available switched uplink subframe after N milliseconds after the last transmission.
  • N 4.
  • the feedback module is configured to feed back uplink ACK/NACK information corresponding to the last transmission of the plurality of downlink HARQ transmissions before the handover on the uplink subframe after the handover.
  • the feedback module is configured to feed back, on the uplink subframe after the handover, one or more downlink HARQ transmissions that are not fed back on the uplink subframe before the handover before the handover.
  • the feedback module is configured to feed back different uplink subframes after different handovers during handover
  • the HARQ transmits the uplink ACK/NACK information corresponding to the last transmission before the handover.
  • the feedback manner of the uplink ACK/NACK information is the same as any of the feedback manners of the uplink ACK/NACK information in the Long Term Evolution (LTE) and the Advanced Long Term Evolution (LTE) system.
  • the uplink acknowledgment/non-acknowledgement ACK/NACK information corresponding to the last transmission of the handover is not fed back in the uplink subframe before the handover in the downlink hybrid automatic repeat request HARQ transmission, at the end.
  • FIG. 1 is a schematic structural diagram of a system according to the related art
  • 2 is a schematic diagram of a frame structure according to the related art
  • FIG. 3 is a flowchart of a method for feeding back confirmation information when a relay link subframe configuration is switched according to an embodiment of the present invention
  • FIG. 4 is a subframe configuration according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram 2 of uplink ACK/NACK feedback when subframe configuration handover is performed according to an embodiment of the present invention
  • FIG. 6 is an uplink ACK/NACK when subframe configuration handover is performed according to an embodiment of the present invention
  • FIG. 7 is a schematic diagram 4 of uplink ACK/NACK feedback when a subframe configuration is switched according to an embodiment of the present invention
  • FIG. 8 is a schematic diagram 5 of uplink ACK/NACK feedback when a subframe configuration is switched according to an embodiment of the present invention
  • FIG. 10 is a schematic diagram of uplink ACK/NACK feedback when subframe configuration handover is performed according to an embodiment of the present invention
  • FIG. 10 is a schematic diagram of uplink ACK/NACK feedback when subframe configuration handover is performed according to an embodiment of the present invention
  • Embodiment 11 is a schematic diagram of uplink ACK/NACK feedback when subframe configuration handover is performed according to an embodiment of the present invention; A block diagram of a feedback device for confirming information when the relay link subframe configuration is switched.
  • BEST MODE FOR CARRYING OUT THE INVENTION the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.
  • Embodiment 1 The embodiment of the present invention discloses a method for feeding back confirmation information when a relay link subframe configuration is switched, and FIG. 3 is a method for feeding back a confirmation information when a relay link subframe configuration is switched according to an embodiment of the present invention.
  • Step S302 When the relay link subframe configuration is switched, if the uplink ACK/NACK information corresponding to the last transmission of the one or more downlink HARQ transmissions before the handover is not fed back on the uplink subframe before the handover.
  • step S304 the uplink ACK/NACK information corresponding to the last transmission is fed back on the available uplink subframe after the last one transmission, and N is an integer.
  • the uplink acknowledgment/non-acknowledgment ACK/NACK information corresponding to the last transmission of the handover is not last.
  • the ACK/NACK information is fed back on the available uplink subframe after the N milliseconds after the first transmission.
  • the available uplink subframe after the handover is the first available uplink subframe after N milliseconds after the last transmission.
  • N 4.
  • the uplink ACK/NACK information corresponding to the last transmission of the multiple downlink HARQ transmissions before the handover may be fed back in the same uplink subframe after the handover.
  • one or more downlink HARQ transmissions are uplink ACK/NACK information that is not fed back on the uplink subframe before the handover.
  • the uplink ACK/NACK information corresponding to the one or more downlink HARQ transmissions after the handover may be fed back on the same uplink subframe after the handover.
  • the uplink ACK/NACK information corresponding to the last transmission of the different HARQ transmissions before the handover may be fed back in different uplink subframes after the handover.
  • the feedback manner of the uplink ACK/NACK information is the same as any of the feedback manners of the uplink ACK/NACK information in the Long Term Evolution (LTE) and the Advanced Long Term Evolution (LTE) system.
  • the feedback mode of the uplink ACK/NACK information may be at least one of the following: format 1/la/lb: The uplink ACK/NACK information to be fed back is spread in the frequency and time directions and then carried on the corresponding resource for feedback; format 2 /2a/2b: The uplink ACK/NACK information to be fed back is fed back on the resource corresponding to the OFDM symbol of the DMRS (Demodulation Reference Signal); format 3: the uplink ACK/NACK information to be fed back in the time direction After the uplink is spread, it is carried on the corresponding resource for feedback.
  • This embodiment achieves backward compatibility.
  • the embodiment of the present invention provides a method for acknowledging information feedback when a relay link subframe configuration is switched.
  • This method can be applied to a link from a base station to a relay node, and without introducing signaling overhead,
  • the backward compatibility is ensured (for example, compatible with the LTE system), and the problem of how the uplink ACK/NACK is fed back when the relay link subframe configuration is switched is also solved.
  • Embodiment 2 In the embodiment of the present invention,
  • UL subframe numb er 10 * SFN+UL subframe index, where SFN represents a system frame number (also referred to as SF number, BP, SF number); a downlink subframe index (DL subframe index) represents 1 The index of 10 subframes included in a frame, whose range is (#0, #1, #2, #3, #4, #5, #6, #7, #8, #9); The link subframe index (UL subframe index) indicates an index of 10 subframes included in one frame, and the range is (#0, #1, #2, #3, #4, #5, #6, #7 , #8, #9).
  • FIG. 4 is a schematic diagram 1 of uplink ACK/NACK feedback when a subframe configuration is switched according to an embodiment of the present invention. As shown in FIG.
  • a subframe combination signaling corresponding to a pre-switch subframe configuration is a decimal "7” or a binary"00000111", the corresponding downlink subframe number in the last 10ms before the handover is modulo the result of "10" to "1", "7", "8”; the subframe combination signaling corresponding to the subframe configuration after the handover is decimal "19” or binary "00010011", the corresponding uplink subframe number in the first 10ms after switching is "2" and "7".
  • the UL ACK/NACK corresponding to the downlink subframe corresponding to "1" after switching the front mode “10” can be fed back on the uplink subframe corresponding to "5" after switching the mode "10"; switching the front mode "10"
  • the UL ACK/NACK corresponding to the downlink subframe corresponding to "7” and “8” may be fed back on the first available uplink subframe after 4 ms or longer. In this example, the corresponding UL ACK/NACK may be switched.
  • the feedback is performed on the uplink subframe corresponding to "2" after the "10" of the back mode, wherein the feedback interval between the downlink subframe corresponding to "7" after the switching of the pre-module "10" and the uplink ACK/NACK is 5 ms.
  • the feedback interval between the downlink subframe corresponding to "8” and the uplink ACK/NACK after switching the "10" of the pre-module is 4 ms, and these intervals satisfy the requirement of 4 ms or more.
  • FIG. 5 is a schematic diagram 2 of uplink ACK/NACK feedback when subframe configuration switching is performed according to an embodiment of the present invention. As shown in FIG. 5, a subframe corresponding to a subframe configuration before handover is configured.
  • the combined signaling is "7” in decimal or "00000111” in binary.
  • the corresponding downlink subframe number in the last 10ms before switching is modulo "1", “7", “8” to "10”;
  • the subframe combination signaling corresponding to the subframe configuration is "27” in decimal or "00011011” in binary, and the corresponding uplink subframe number in the first 10 ms after switching is “0", "2" for the "10". ", "7”.
  • the UL ACK/NACK corresponding to the downlink subframe corresponding to "1" after switching the front mode “10” can be fed back on the uplink subframe corresponding to "5" after switching the mode "10"; switching the front mode "10"
  • the UL ACK/NACK corresponding to the downlink subframe corresponding to "7” and “8” may be fed back on the first available uplink subframe after 4 ms or more.
  • the uplink subframe corresponding to "0" is the first available uplink subframe after the handover, but does not satisfy the requirement of 4 ms, so the corresponding UL ACK/NACK can be corresponding to "2" after the switch is switched to "10".
  • FIG. 6 is a schematic diagram 3 of uplink ACK/NACK feedback when subframe configuration switching is performed according to an embodiment of the present invention, as shown in FIG.
  • the subframe combination signaling is decimal “7” or binary "00000111", and the corresponding downlink subframe number in the last 10 ms before the handover is "1", "7", "8".
  • the subframe combination signaling corresponding to the subframe configuration after switching is decimal "16" or binary "00010000", and the corresponding uplink subframe number in the first 10 ms after the handover is modulo "3" to "10".
  • the UL ACK/NACK corresponding to the downlink subframe corresponding to "1" after switching the front mode “10” can be fed back on the uplink subframe corresponding to "5" after switching the mode “10”; switching the front mode “10”
  • the UL ACK/NACK corresponding to the downlink subframe corresponding to "7” and “8” can be fed back in the uplink subframe corresponding to "7” after the switch mode is "10"; after switching the mode "10",
  • the UL ACK/NACK corresponding to the downlink subframe corresponding to "3” can be fed back on the uplink subframe corresponding to "7” after the mode is switched "10".
  • FIG. 7 is a schematic diagram 4 of uplink ACK/NACK feedback when subframe configuration switching is performed according to an embodiment of the present invention.
  • the subframe combination signaling is decimal “7” or binary "00000111", and the corresponding downlink subframe number in the last 10 ms before the handover is "1", "7", "8".
  • the subframe combination signaling corresponding to the subframe configuration after handover is decimal "7” or binary "00000111", and the corresponding uplink subframe number in the first 10 ms after the handover is modulo "1", "2"".
  • the UL ACK/NACK corresponding to the downlink subframe corresponding to "1" after switching the front mode “10” can be fed back on the uplink subframe corresponding to "5" after switching the mode "10”; switching the front mode “10”
  • the UL ACK/NACK corresponding to the downlink subframe corresponding to "7” can be fed back in the uplink subframe corresponding to "1” after switching the mode "10”; the "10” corresponding to the front mode “10” is switched.
  • the UL ACK/NACK corresponding to the downlink subframe may be fed back on the uplink subframe corresponding to "2" after the mode is switched "10".
  • FIG. 8 is a schematic diagram 5 of uplink ACK/NACK feedback when subframe configuration switching is performed according to an embodiment of the present invention.
  • the subframe combination signaling is decimal “7” or binary “00000111", and the corresponding downlink subframe number in the last 10 ms before the handover is modulo "1", "7", "8” to the "10";
  • the subframe combination signaling corresponding to the subframe configuration is decimal "15” or binary "00001111", and the corresponding uplink subframe number in the first 10 ms after the handover is "0", "1", and the modulo result is "0", "1", “2".
  • the UL ACK/NACK corresponding to the downlink subframe corresponding to "1" after switching the front mode “10” can be fed back on the uplink subframe corresponding to "5" after switching the mode "10"; switching the front mode "10”
  • the UL ACK/NACK corresponding to the downlink subframe corresponding to "7” and “8” may be fed back on the first available uplink subframe after 4 ms or more.
  • the uplink subframe corresponding to "0" is the first available uplink subframe after the handover, but does not satisfy the requirement of 4 ms. Therefore, the downlink subframe corresponding to "7” after switching the front mode "10", and the corresponding UL.
  • FIG. 9 is a schematic diagram 6 of uplink ACK/NACK feedback when subframe configuration switching is performed according to an embodiment of the present invention, as shown in FIG.
  • the subframe combination signaling is decimal “15” or binary “00001111", and the corresponding downlink subframe number in the last 10 ms before the handover is “1", “6", “7”, and the modulo result is “1", “6", "7", “8”;
  • the subframe combination signaling corresponding to the subframe configuration after handover is "7” in decimal or "00000111” in binary, and the corresponding uplink subframe number in the first 10 ms after switching is modulo the result of "10". "1", "2".
  • the UL ACK/NACK corresponding to the downlink subframe corresponding to "1" after switching the front mode “10” can be fed back on the uplink subframe corresponding to "5" after switching the mode "10"; switching the front mode “10”
  • the UL ACK/NACK corresponding to the downlink subframe corresponding to "6" and “7” may be an uplink subframe corresponding to "1” after the mode is switched “10". Feedback is performed on the uplink ACK/NACK corresponding to the downlink subframe corresponding to "8” after switching the "10" of the pre-module, and the feedback is performed on the uplink subframe corresponding to "2" after the handover mode is "10".
  • FIG. 10 is a schematic diagram 7 of uplink ACK/NACK feedback when subframe configuration switching is performed according to an embodiment of the present invention. As shown in FIG. 10, the subframe configuration before handover is corresponding.
  • the subframe combination signaling is decimal “15” or binary “00001111”, and the corresponding downlink subframe number in the last 10 ms before the handover is “1", “6", “7”, and the modulo result is “1", “6", "7", “8”;
  • the subframe combination signaling corresponding to the subframe configuration after handover is decimal "28” or binary “00011100”, and the corresponding uplink subframe number in the first 10 ms after the handover is modulo the result to "10". ", "1", "7”.
  • the UL ACK/NACK corresponding to the downlink subframe corresponding to "1" after switching the front mode “10” can be fed back on the uplink subframe corresponding to "5" after switching the mode "10”; switching the front mode “10”
  • the UL ACK/NACK corresponding to the downlink subframe corresponding to "6” can be fed back in the uplink subframe corresponding to "0" after the switch mode "10”; the "10” corresponding to the front mode “10” is switched.
  • the UL ACK/NACK corresponding to the downlink subframe may be fed back on the uplink subframe corresponding to "1" after the switch mode "10"; the downlink subframe corresponding to "8" after the switch mode “10” is switched UL ACK/NACK can be fed back to the uplink subframe corresponding to "7” after switching "10” after switching; the UL ACK/NACK corresponding to the downlink subframe corresponding to "3" after switching the mode “10” can be The feedback is performed on the uplink subframe corresponding to "7” after switching the mode "10".
  • the feedback manner of the uplink ACK/NACK information is the same as any of the feedback methods of the uplink ACK/NACK information in the LTE and LTE-A systems.
  • the feedback mode of the uplink ACK/NACK information may be at least one of the following: format 1/la/lb: The uplink ACK/NACK information to be fed back is transmitted in the frequency and time direction and then carried on the corresponding resource for feedback; Format 2/2a/2b: The uplink ACK/NACK information to be fed back is fed back on the resource corresponding to the OFDM symbol of the DMRS (Demodulation Reference Signal); format 3: The uplink ACK/NACK information to be fed back is in time After the frequency is spread in the direction, it is carried on the corresponding resource for feedback.
  • Embodiment 4 The embodiment of the present invention further provides a feedback device for confirming information when a relay link subframe configuration is switched, and the device is used to implement the foregoing method.
  • the device may be a relay node.
  • 11 is a structural block diagram of a feedback apparatus for confirming information when a relay link subframe configuration is switched according to an embodiment of the present invention. As shown in FIG. 11, the apparatus includes: a determining module 1102, configured to be in a relay link subframe.
  • the uplink acknowledgement/non-acknowledgement ACK/NACK information corresponding to the last transmission of the one or more downlink hybrid automatic repeat request HARQ transmissions before the handover is not fed back on the uplink subframe before the handover; the feedback module 1104 And coupled to the determining module 1102, configured to feed back ACK/NACK information on an available uplink subframe after N milliseconds after the last transmission, where N is an integer.
  • the feedback module 1104 is arranged to feed back ACK/NACK information on the first available switched uplink subframe after N milliseconds after the last transmission.
  • N 4.
  • the feedback module 1104 is configured to feed back uplink ACK/NACK corresponding to the last transmission of the multiple downlink HARQ transmissions before the handover on the same uplink subframe after the handover. information.
  • the feedback module 1104 is configured to: when switching, feed back one or more downlink HARQ transmissions on the same uplink subframe after the handover, and the corresponding transmission is not performed before the handover. Uplink ACK/NACK information fed back on the uplink subframe before handover and uplink ACK/NACK information corresponding to one or more downlink HARQ transmissions after handover.
  • the feedback module 1104 is configured to feed back uplink ACK/NACK corresponding to the last transmission of the different HARQ transmissions before the handover on different uplink subframes after handover. information.
  • the feedback manner of the uplink ACK/NACK information is the same as any of the feedback manners of the uplink ACK/NACK information in the Long Term Evolution (LTE) and Advanced Long Term Evolution (LTE) systems.
  • the feedback manner of the uplink ACK/NACK information may also adopt the feedback manner in the third embodiment.
  • the method according to the embodiment of the present invention can be well applied to a base-to-relay node link.
  • This method not only introduces signaling overhead, but also ensures backward compatibility (for example, Compatible with the LTE system), and also solves the problem of how the uplink ACK/NACK is fed back when the relay link subframe configuration is switched.
  • a general-purpose computing device which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices.
  • 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.

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  • Mobile Radio Communication Systems (AREA)

Abstract

本发明公开了一种中继链路子帧配置切换时确认信息的反馈方法及装置,该方法包括:在中继链路子帧配置切换时,如果一个或多个下行混合自动重传请求HARQ传输在切换前的最后一次传输所对应的上行ACK/NACK信息未在切换前的上行子帧上反馈,则在最后一次传输之后的N毫秒以后的可用的切换后的上行子帧上反馈ACK/NACK信息,其中,N为整数,本发明达到了在中继链路子帧配置切换时,正确反馈确认信息的效果。

Description

中继链路子帧配置切换时确认信息的反馈方法及装置 技术领域 本发明涉及通信领域, 具体而言, 涉及一种中继链路子帧配置切换时确认信息的 反馈方法及装置。 背景技术 图 1是根据相关技术的系统结示意图, LTE-A (Long Term Evolution Advanced, 高级的长期演进)系统中引入 RN (Relay Node, 中继节点)之后增加了新的链路, 相 应的术语包括: eNB ( eNode-B, 节点 B或基站) 与 RN之间的链路称为 backhaul link (回程链路或中继链路)、 RN与 UE(User Equipment,用户设备)之间的链路称为 access link (接入链路)、 eNode-B与 UE之间的链路称为 direct link (直传链路)。采用带内中 继 (inband-relay) 即为 eNode-B到 relay (中继) 的链路和 relay到 UE的链路运作在 相同的频率资源上。 因为 inband-relay发射机会对自己的接收机产生干扰 (自干扰), 所以 eNode-B到 relay的链路和 relay到 UE的链路同时在相同的频率资源上是不可能 的, 除非有足够的信号分离和天线隔离度。 相似地, relay也不可能在接收 UE所发射 的数据的同时再给 eNode-B发射。解决收发干扰问题的一个可能的方法是: 使得 relay 在接收来自 eNode-B的数据时, 不向 UE进行发射操作, 也就是说在 relay到 UE链路 后需要增加 "gap" (间隙), 通过配置 MBSFN (Multicast Broadcast Single Frequency Network, 多播广播单频网络) subframe (子帧)用于 backhaul subframe, 使得 UE在 "gap" 时间范围内不进行任何接收 /发射操作, 而 Relay在 "gap" 时间范围内完成发 射到接收的切换, 切换完成后在后面的 OFDM ( Orthogonal Frequency Division Multiplexing,正交频分复用)符号接收来自 eNB的数据。在相关技术中,在 LTE (Long Term Evolution, 长期演进)系统中采用 MBSFN subframe用于 backhaul subframe的具 体方式是: MCE (MBMS Control Entity, 多媒体控制实体) 首先给 eNode-B配置可用 的 MBSFN subframe, eNode-B再在这些可用的 MBSFN subframe中配置可用的 backhaul subframe。 图 2是根据相关技术的帧结构的示意图, 依照目前 LTE系统中的规定, 1个 10ms 无线帧 frame由 10个 1ms的子帧 subframe构成, 可包括 Unicast (单播) 和 Multicast Broadcast (多播广播), 其中, 在采用 FDD (Frequency Division Duplex, 频分双工) 方式时, #0、 #5 子帧用作发射同步信号, 而 #4、 #9子帧用作寻呼 (paging), 在采用 TDD ( Time Division Duplex, 时分双工) 方式时, #0、 #5子帧用作发射同步信号, 而 #1、 #6子帧用作寻呼(paging), 也就是说,对于 FDD{#0、 #4、 #5、 #9}子帧, TDD{#0 #1、 #5、 #6}子帧有上述特殊用途, 所以不能用于 MBSFN subframe的分配, 即, 在 1 个无线帧 frame里可分配的 MBSFN subframe最多为 6个子帧 (subframe)。 在 LTE 系统中, 用户设备和基站之间的数据的传输需要建立 HARQ ( Hybrid Automatic Repeat Request, 混合自动重传请求) 进程并进行相应的反馈。 当用户设备 接收到基站的数据后, 用户设备根据解码情况生成上行反馈信息 (例如, 上行 ACK/NACK) , 并将这些信息发送给基站。 然后, 基站根据接收到的信息进行下一步 处理, 如果收到 ACK =1或 0, 则可以传输新的数据 (分别表示 ACK是 " 1 "有效, 或是 "0"有效), 若收到 NACK =0或 1 (分别表示 NACK是 "0"有效, 或是 " 1 " 有效), 则把需要重传的数据重新发送给用户设备。 中继链路因为不能使用 FDD{#0、 #4、 #5、 #9}下行子帧, 相应的也不能使用 FDD{#4 #8、 #9、 #3 }上行子帧。 目前对于上行 HARQ 的设计主要包括仅使用 8ms 或 16ms倍数的下上行子帧组合,即,假设在 40ms范围内,下行子帧 8个集合包括 {(#7 #23 #31)、(#6 #22 #38)、(#13 #21 #37)、(#12 #28 #36)、(#3 #11 #27)、 (#2 #18 #26) (#1 #17 #33)、 (#8 #16 #32)} , 对应的上行子帧 8个集合包括 {(#11 #27 #35)、 (#10 #26 #42)、 (#17 #25 #41)、 (#16 #32 #40)、 (#7 #15 #31)、 (#6 #22 #30)、 (#5 #21 #37)、 (#12 #20 #36)} , 其中, 大于 "40" 的子帧在计算过程中可以对 "40"求模运算, 例如 mod (42, 40) =2。 实际上, 1个下行子帧集合对应 1个上行子帧集合, 也就是说, 从下上行子帧集 合整体来看, 共 8个下上行子帧集合, 不同的集合组合在一起的情况共包括 2的 8次 方个组合(即, 256个组合)。 由于下行子帧间隔 4ms后将会有对应的上行子帧, 所以 上行 ACK/NACK的反馈可以像 LTE—样不需要作任何修改, 但是在子帧配置发生切 换时, 被配置的组合中对应的上行子帧和切换前的下行子帧之间的关系可能不再满足 4ms的关系。 具体地, 集合索引如表 1所示, 需要说明的是, 集合和集合索引之间并不限于表 1所示的对应关系。 在进行子帧分配时才有 8比特的 bitmap (比特图) 方式, 即 8 bits
(比特) 的二进制分别对应不同的集合索引, 接收端只要获取了集合索引就获取了子 帧配置。 表 1
Figure imgf000005_0001
具体地, 256个组合情况对应的 HARQ进程数如表 2所示, 其中第 1列中的组合 配置使用的是十进制, 例如, "170"表示成 8 bits的二进制为 "10101010", 其表示集 合索引为 "7"、 "5"、 "3"、 "1"对应的集合组合在一起。 表 2
组合数 HARQ 集合
组合配置 (十进制) 子帧数
(256) 进程数
0 1 0 0 0
1,2,4,8,16,32,64,128 8 1 1 3
3,5,6,9, 10, 12, 17, 18,20,24,33,34,36,40,48,65,
28 2 2 6 66,68,72,80,96,129,130,132,136,144,160,192
7,11,13,14,19,21,22,25,26,28,35,37,38,41,42,
44,49,50,52,56,67,69,70,73,74,76,81,82,84,
85,88,97,98,100,104,112,131,133,134,137, 58 3 3,4 9,12 138,140,145,146,148,152,161,162,164,168,
170, 176,193,194, 196,200,208,224
15,23,27,29,30,39,43,45,46,51,53,54,57,58,
60,71,75,77,78,83,86,87,89,90,91,92,93,99,
101,102,105,106,107,108,109,113,114,116,
117,120,135,139,141,142,147,149,150,153,
84 4 4,5 12,15 154,156,163,165,166,169,171,172,173,174,
177,178,180,181,182,184,186,195,197,198,
201,202,204,209,210,212,213,214,216,218,
225,226,228,232,234,240
31,47,55,59,61,62,79,94,95,103,110,111,115,
118,119,121,122,123,124,125,143,151,155,
157,158,167,175,179,183,185,187,188,189,
60 5 5,6 15,18
190,199,203,205,206,211,215,217,219,220,
221,222,227,229,230,233,235,236,237,238,
241,242,244,245,246,248,250
63,126,127, 159,191,207,223,231,239,243,
17 6 6,7,8 18,21,24 247,249,251,252,253,254,255 发明人发现, 相关技术中, 没有提供在中继链路子帧配置切换时如何反馈确认信 息的方案。 发明内容 针对相关技术中没有提供在中继链路子帧配置切换时上行 ACK/NACK如何反馈 的问题, 本发明提供了一种中继链路子帧配置切换时确认信息的反馈方案。 根据本发明的一个方面, 提供了一种中继链路子帧配置切换时确认信息的反馈方 法,包括:在中继链路子帧配置切换时,如果一个或多个下行混合自动重传请求 HARQ 传输在切换前的最后一次传输所对应的上行 ACK/NACK信息未在切换前的上行子帧 上反馈, 则在最后一次传输之后的 N 毫秒以后的可用的切换后的上行子帧上反馈 ACK/NACK信息, 其中, N为整数。 优选地, 可用的切换后的上行子帧为最后一次传输之后的 N毫秒以后的第一个可 用的切换后的上行子帧。 优选地, N=4。 优选地, 在切换时, 多个下行 HARQ传输在切换前的最后一次传输所对应的上行 ACK/NACK信息在相同的切换后的上行子帧上反馈。 优选地, 在切换时, 一个或多个下行 HARQ传输在切换前最后一次传输所对应的 未在切换前的上行子帧上反馈的上行 ACK/NACK 信息和切换后的一个或多个下行 HARQ传输所对应的上行 ACK/NACK信息在相同的切换后的上行子帧上反馈。 优选地, 在切换时, 不同的 HARQ 传输在切换前的最后一次传输所对应的上行 ACK/NACK信息在不同的切换后的上行子帧上反馈。 优选地, 上行 ACK/NACK信息的反馈方式与长期演进 LTE和高级的长期演进 LTE-A系统中上行 ACK/NACK信息的反馈方式中的任何一种相同。 优选地, 上行 ACK/NACK信息的反馈方式为以下至少一种: 格式 format 1/1 a/lb: 待反馈的上行 ACK/NACK信息在频率、 时间方向上扩频后承载在对应的资源上进行 反馈; format 2/2a/2b: 待反馈的上行 ACK/NACK信息承载在解调参考符号 DMRS的 正交频分复用 OFDM符号对应的资源上进行反馈; format 3 :待反馈的上行 ACK/NACK 信息在时间方向上扩频后承载在对应的资源上进行反馈。 根据本发明的另一方面, 提供了一种中继链路子帧配置切换时确认信息的反馈装 置, 包括: 确定模块, 设置为在中继链路子帧配置切换时, 确定一个或多个下行混合 自动重传请求 HARQ传输在切换前的最后一次传输所对应的上行 ACK/NACK信息未 在切换前的上行子帧上反馈; 反馈模块, 设置为在最后一次传输之后的 N毫秒以后的 可用的切换后的上行子帧上反馈 ACK/NACK信息, 其中, N为整数。 优选地, 反馈模块, 设置为在最后一次传输之后的 N毫秒以后的第一个可用的切 换后的上行子帧上反馈 ACK/NACK信息。 优选地, N=4。 优选地, 反馈模块设置为在切换时, 在相同的切换后的上行子帧上反馈多个下行 HARQ传输在切换前的最后一次传输所对应的上行 ACK/NACK信息。 优选地, 反馈模块设置为在切换时, 在相同的切换后的上行子帧上反馈一个或多 个下行 HARQ传输在切换前最后一次传输所对应的未在切换前的上行子帧上反馈的上 行 ACK/NACK信息和切换后的一个或多个下行 HARQ传输所对应的上行 ACK/NACK 信息。 优选地, 反馈模块设置为在切换时, 在不同的切换后的上行子帧上反馈不同的
HARQ传输在切换前的最后一次传输所对应的上行 ACK/NACK信息。 优选地, 上行 ACK/NACK信息的反馈方式与长期演进 LTE和高级的长期演进 LTE-A系统中上行 ACK/NACK信息的反馈方式中的任何一种相同。 通过本发明,采用在下行混合自动重传请求 HARQ传输在切换的最后一次传输所 对应的上行确认 /非确认 ACK/NACK信息未在所述切换前的上行子帧上反馈的情况 下,在最后一次传输之后的 N毫秒以后的可用的切换后的上行子帧上反馈 ACK/NACK 信息的方式, 进而达到了在中继链路子帧配置切换时, 正确反馈确认信息的效果。 附图说明 此处所说明的附图用来提供对本发明的进一步理解, 构成本申请的一部分, 本发 明的示意性实施例及其说明用于解释本发明, 并不构成对本发明的不当限定。 在附图 中: 图 1是根据相关技术的系统的结构示意图; 图 2是根据相关技术的帧结构示意图; 图 3是根据本发明实施例的中继链路子帧配置切换时确认信息的反馈方法的流程 图; 图 4是根据本发明实施例的子帧配置切换时上行 ACK/NACK反馈示意图 1 ; 图 5是根据本发明实施例的子帧配置切换时上行 ACK/NACK反馈示意图 2; 图 6是根据本发明实施例的子帧配置切换时上行 ACK/NACK反馈示意图 3 ; 图 7是根据本发明实施例的子帧配置切换时上行 ACK/NACK反馈示意图 4; 图 8是根据本发明实施例的子帧配置切换时上行 ACK/NACK反馈示意图 5 ; 图 9是根据本发明实施例的子帧配置切换时上行 ACK/NACK反馈示意图 6; 图 10是根据本发明实施例的子帧配置切换时上行 ACK/NACK反馈示意图 7; 图 11 是根据本发明实施例的中继链路子帧配置切换时确认信息的反馈装置的结 构框图。 具体实施方式 下文中将参考附图并结合实施例来详细说明本发明。 需要说明的是, 在不冲突的 情况下, 本申请中的实施例及实施例中的特征可以相互组合。 实施例一 本发明实施例公开了一种中继链路子帧配置切换时确认信息的反馈方法, 图 3是 根据本发明实施例的中继链路子帧配置切换时确认信息的反馈方法的流程图, 该方法 包括如下的步骤 S302至步骤 S304。 步骤 S302, 在中继链路子帧配置切换时, 如果一个或多个下行 HARQ传输在切 换前的最后一次传输所对应的上行 ACK/NACK信息未在切换前的上行子帧上反馈。 步骤 S304,在该最后一次传输之后的 N毫秒以后的可用的切换后的上行子帧上反 馈该最后一次传输对应的上行 ACK/NACK信息, 其中, N为整数。 该实施例中,在下行混合自动重传请求 HARQ传输在切换的最后一次传输所对应 的上行确认 /非确认 ACK/NACK信息未在所述切换前的上行子帧上反馈的情况下, 在 最后一次传输之后的 N毫秒以后的可用的切换后的上行子帧上反馈 ACK/NACK信息, 通过这种方式, 在没有引入信令开销的情况下, 解决了相关技术中, 不清楚中继链路 子帧配置切换时上行 ACK/NACK如何反馈的问题。 例如, 该可用的切换后的上行子帧为最后一次传输之后的 N毫秒以后的第一个可 用的切换后的上行子帧。 优选地, N=4。 在本发明实施例的一个优选实现方式中, 在上述切换时, 多个下行 HARQ传输在 切换前的最后一次传输所对应的上行 ACK/NACK信息可以在相同的切换后的上行子 帧上反馈。 在本发明实施例的另一个优选实现方式中,在上述切换时,一个或多个下行 HARQ 传输在切换前最后一次传输所对应的未在切换前的上行子帧上反馈的上行 ACK/NACK信息和切换后的一个或多个下行 HARQ传输所对应的上行 ACK/NACK信 息可以在相同的切换后的上行子帧上反馈。 在本发明实施例的又一个优选实现方式中, 在上述切换时, 不同的 HARQ传输在 切换前的最后一次传输所对应的上行 ACK/NACK信息可以在不同的切换后的上行子 帧上反馈。 优选地, 上行 ACK/NACK信息的反馈方式与长期演进 LTE和高级的长期演进 LTE-A系统中上行 ACK/NACK信息的反馈方式中的任何一种相同。上行 ACK/NACK 信息的反馈方式可以为以下至少一种: format 1/la/lb: 待反馈的上行 ACK/NACK信 息在频率、 时间方向上扩频后承载在对应的资源上进行反馈; format 2/2a/2b: 待反馈 的上行 ACK/NACK信息承载在 DMRS (Demodulation Reference Signal, 解调参考符 号)的 OFDM符号对应的资源上进行反馈; format 3 : 待反馈的上行 ACK/NACK信息 在时间方向上扩频后承载在对应的资源上进行反馈。 该实施例实现了后向兼容。 本发明实施例提供一种了中继链路子帧配置切换时确认信息反馈方法, 这种方法 可以很好地适用于基站到中继节点链路, 在没有引入信令开销的情况下, 既保证了后 向兼容性(例如,兼容 LTE系统),也解决了中继链路子帧配置切换时上行 ACK/NACK 如何反馈的问题。 实施例二 在本发明实施例中,
DL subframe numb er= 10 * SFN+DL subframe index,
UL subframe numb er= 10 * SFN+UL subframe index, 其中, SFN表示系统帧号( System Frame Number,也称为 SF号, BP, SF number); 下行链路子帧索引 (DL subframe index)表示 1个帧(frame)中包括的 10个 subframe 的索引, 其范围为 (#0、 #1、 #2、 #3、 #4、 #5、 #6、 #7、 #8、 #9); 上行链路子帧索引 (UL subframe index)表示 1个 frame中包括的 10个 subframe的索引,其范围为(#0、 #1、 #2、 #3、 #4、 #5、 #6、 #7、 #8、 #9)。 下面参照附图和实例对本发明实施例的实现方式进行具体说明, 下列实例均采用 实施例一中的方法进行确认消息的反馈。 实例一 假设当前切换周期(period)为 40ms, 假设 N毫秒 =4ms。 图 4是根据本发明实施 例的子帧配置切换时上行 ACK/NACK反馈示意图 1, 如图 4所示, 切换前子帧配置对 应的子帧组合信令为十进制的 "7"或二进制的 "00000111", 切换前最后一个 10ms 内对应的下行子帧号对 "10"求模结果为 "1"、 "7"、 "8"; 切换后子帧配置对应的子 帧组合信令为十进制的 "19"或二进制的 "00010011", 切换后第一个 10ms内对应的 上行子帧号对 "10"求模结果为 "2"、 "7"。 切换前模 "10"后为 "1"对应的下行子帧对应的 UL ACK/NACK可以在切换前 模 "10"后为 "5"对应的上行子帧上进行反馈; 切换前模 "10"后为 "7"、 "8"对应 的下行子帧对应的 UL ACK/NACK可以大于等于 4ms后的第一个可用的上行子帧上进 行反馈, 此例中对应的 UL ACK/NACK可以在切换后模 "10"后为 "2"对应的上行 子帧上进行反馈,其中,对于切换前模" 10"后为" 7"对应的下行子帧与上行 ACK/NACK 之间的反馈间隔为 5ms, 切换前模 "10"后为 "8"对应的下行子帧与上行 ACK/NACK 之间的反馈间隔为 4ms, 这些间隔都满足大于等于 4ms的需求。 (切换前模 "10"表示 切换前最后一个 10ms 内对应的下行子帧号对 "10"求模; 切换后模 "10"表示切换 后第一个 10ms内对应的上行子帧号对 "10"求模, 不再赘述。 图 4-10中虚线箭头表 示反馈关系, 以后不再赘述。) 实例二 假设当前切换周期为 40ms, 假设 N毫秒 =4ms, 图 5是根据本发明实施例的子帧 配置切换时上行 ACK/NACK反馈示意图 2, 如图 5所示, 切换前子帧配置对应的子帧 组合信令为十进制的 "7"或二进制的 "00000111", 切换前最后一个 10ms 内对应的 下行子帧号对 "10"求模结果为 "1"、 "7"、 "8"; 切换后子帧配置对应的子帧组合信 令为十进制的 "27"或二进制的 "00011011", 切换后第一个 10ms内对应的上行子帧 号对 "10"求模结果为 "0"、 "2"、 "7"。 切换前模 "10"后为 "1"对应的下行子帧对应的 UL ACK/NACK可以在切换前 模 "10"后为 "5"对应的上行子帧上进行反馈; 切换前模 "10"后为 "7"、 "8"对应 的下行子帧对应的 UL ACK/NACK可以在大于等于 4ms后的第一个可用的上行子帧上 进行反馈, 此例中切换后模 "10"后为 "0"对应的上行子帧虽然为切换后第一个可用 的上行子帧,但不满足 4ms的需求,所以其对应的 UL ACK/NACK可以在切换后模" 10" 后为 "2"对应的上行子帧上进行反馈。 实例三 假设当前切换周期为 40ms, 假设 N毫秒 =4ms, 图 6是根据本发明实施例的子帧 配置切换时上行 ACK/NACK反馈示意图 3, 如图 6所示, 切换前子帧配置对应的子帧 组合信令为十进制的 "7"或二进制的 "00000111", 切换前最后一个 10ms 内对应的 下行子帧号对 "10"求模结果为 "1"、 "7"、 "8"; 切换后子帧配置对应的子帧组合信 令为十进制的 "16"或二进制的 "00010000", 切换后第一个 10ms内对应的上行子帧 号对 "10"求模结果为 "3"。 切换前模 " 10"后为 " 1 "对应的下行子帧对应的 UL ACK/NACK可以在切换前 模 "10"后为 "5"对应的上行子帧上进行反馈; 切换前模 "10"后为 "7"、 "8"对应 的下行子帧对应的 UL ACK/NACK可以在切换后模 "10"后为 "7"对应的上行子帧 上进行反馈; 切换后模 "10"后为 "3"对应的下行子帧对应的 UL ACK/NACK可以 在切换后模 "10"后为 "7"对应的上行子帧上进行反馈。 实例四 假设当前切换周期为 40ms, 假设 N毫秒 =4ms, 图 7是根据本发明实施例的子帧 配置切换时上行 ACK/NACK反馈示意图 4, 如图 7所示, 切换前子帧配置对应的子帧 组合信令为十进制的 "7"或二进制的 "00000111", 切换前最后一个 10ms 内对应的 下行子帧号对 "10"求模结果为 "1"、 "7"、 "8"; 切换后子帧配置对应的子帧组合信 令为十进制 "7"或二进制 "00000111", 切换后第一个 10ms 内对应的上行子帧号对 "10"求模结果为 "1"、 "2"。 切换前模 "10"后为 "1"对应的下行子帧对应的 UL ACK/NACK可以在切换前 模 "10"后为 "5"对应的上行子帧上进行反馈; 切换前模 "10"后为 "7"对应的下 行子帧对应的 UL ACK/NACK可以在切换后模 "10"后为 "1"对应的上行子帧上进 行反馈; 切换前模 "10"后为 "8"对应的下行子帧对应的 UL ACK/NACK可以在切 换后模 "10"后为 "2"对应的上行子帧上进行反馈。 实例五 假设当前切换周期为 40ms, 假设 N毫秒 =4ms, 图 8是根据本发明实施例的子帧 配置切换时上行 ACK/NACK反馈示意图 5, 如图 8所示, 切换前子帧配置对应的子帧 组合信令为十进制 "7"或二进制 "00000111", 切换前最后一个 10ms 内对应的下行 子帧号对 "10"求模结果为 "1"、 "7"、 "8"; 切换后子帧配置对应的子帧组合信令为 十进制 "15"或二进制 "00001111", 切换后第一个 10ms内对应的上行子帧号对 "10" 求模结果为 "0"、 "1"、 "2"。 切换前模 "10"后为 "1"对应的下行子帧对应的 UL ACK/NACK可以在切换前 模 "10"后为 "5"对应的上行子帧上进行反馈; 切换前模 "10"后为 "7"、 "8"对应 的下行子帧对应的 UL ACK/NACK可以在大于等于 4ms后的第一个可用的上行子帧上 进行反馈, 此例中切换后模 "10"后为 "0"对应的上行子帧虽然为切换后第一个可用 的上行子帧, 但不满足 4ms的需求, 所以切换前模 "10"后为 "7"对应的下行子帧, 其对应的 UL ACK/NACK可以在切换后模 "10"后为 "1"对应的上行子帧上进行反 馈; 切换前模 "10"后为 "8"对应的下行子帧对应的 UL ACK/NACK可以在切换后 模 "10"后为 "2"对应的上行子帧上进行反馈。 实例六 假设当前切换周期为 40ms, 假设 N毫秒 =4ms, 图 9是根据本发明实施例的子帧 配置切换时上行 ACK/NACK反馈示意图 6, 如图 9所示, 切换前子帧配置对应的子帧 组合信令为十进制的 "15"或二进制的 "00001111", 切换前最后一个 10ms内对应的 下行子帧号对 "10"求模结果为 "1"、 "6"、 "7"、 "8"; 切换后子帧配置对应的子帧组 合信令为十进制的 "7"或二进制的 "00000111", 切换后第一个 10ms 内对应的上行 子帧号对 "10"求模结果为 "1"、 "2"。 切换前模 "10"后为 "1"对应的下行子帧对应的 UL ACK/NACK可以在切换前 模 "10"后为 "5"对应的上行子帧上进行反馈; 切换前模 "10"后为 "6"、 "7"对应 的下行子帧对应的 UL ACK/NACK可以在切换后模 " 10"后为 " 1 "对应的上行子帧 上进行反馈; 切换前模 "10"后为 "8"对应的下行子帧对应的 UL ACK/NACK可以 在切换后模 "10"后为 "2"对应的上行子帧上进行反馈。 实例七 假设当前切换周期为 40ms, 假设 N毫秒 =4ms, 图 10是根据本发明实施例的子帧 配置切换时上行 ACK/NACK反馈示意图 7, 如图 10所示, 切换前子帧配置对应的子 帧组合信令为十进制的 "15"或二进制的 "00001111", 切换前最后一个 10ms内对应 的下行子帧号对 "10"求模结果为 "1"、 "6"、 "7"、 "8"; 切换后子帧配置对应的子帧 组合信令为十进制 "28"或二进制 "00011100", 切换后第一个 10ms内对应的上行子 帧号对 "10"求模结果为 "0"、 "1"、 "7"。 切换前模 " 10"后为 " 1 "对应的下行子帧对应的 UL ACK/NACK可以在切换前 模 "10"后为 "5"对应的上行子帧上进行反馈; 切换前模 "10"后为 "6"对应的下 行子帧对应的 UL ACK/NACK可以在切换后模 "10"后为 "0"对应的上行子帧上进 行反馈; 切换前模 "10"后为 "7"对应的下行子帧对应的 UL ACK/NACK可以在切 换后模 "10"后为 "1"对应的上行子帧上进行反馈; 切换前模 "10"后为 "8"对应 的下行子帧对应的 UL ACK/NACK可以在切换后模 "10"后为 "7"对应的上行子帧 上进行反馈; 切换后模 "10"后为 "3"对应的下行子帧对应的 UL ACK/NACK可以 在切换后模 "10"后为 "7"对应的上行子帧上进行反馈。 实施例三 在本实施例及上述实施例中, 上行 ACK/NACK信息的反馈方式与 LTE和 LTE-A 系统中上行 ACK/NACK信息的反馈方式中的任何一种相同。 例如, 上行 ACK/NACK 信息的反馈方式可以为以下至少一种: format 1/la/lb: 待反馈的上行 ACK/NACK信息在频率、 时间方向上扩频后承载 在对应的资源上进行反馈; format 2/2a/2b: 待反馈的上行 ACK/NACK 信息承载 DMRS ( Demodulation Reference Signal, 解调参考符号) 的 OFDM符号对应的资源上进行反馈; format 3: 待反馈的上行 ACK/NACK信息在时间方向上扩频后承载在对应的资源 上进行反馈。 该实施例实现了后向兼容。 实施例四 本发明实施例还提供了一种中继链路子帧配置切换时确认信息的反馈装置, 该装 置用于实现上述方法。 优选地, 该装置可以是中继节点。 图 11 是根据本发明实施例的中继链路子帧配置切换时确认信息的反馈装置的结 构框图, 如图 11所示, 该装置包括: 确定模块 1102, 设置为在中继链路子帧配置切 换时,确定一个或多个下行混合自动重传请求 HARQ传输在切换前的最后一次传输所 对应的上行确认 /非确认 ACK/NACK信息未在切换前的上行子帧上反馈; 反馈模块 1104, 耦合至确定模块 1102, 设置为在该最后一次传输之后的 N毫秒以后的可用的切 换后的上行子帧上反馈 ACK/NACK信息, 其中, N为整数。 优选地, 反馈模块 1104设置为在最后一次传输之后的 N毫秒以后的第一个可用 的切换后的上行子帧上反馈 ACK/NACK信息。 优选地, N=4。 在本发明实施例的一个优选实例中, 反馈模块 1104设置为在切换时, 在相同的切 换后的上行子帧上反馈多个下行 HARQ 传输在切换前的最后一次传输所对应的上行 ACK/NACK信息。 在本发明实施例的另一个优选实例中, 反馈模块 1104设置为在切换时, 在相同的 切换后的上行子帧上反馈一个或多个下行 HARQ传输在切换前最后一次传输所对应的 未在切换前的上行子帧上反馈的上行 ACK/NACK 信息和切换后的一个或多个下行 HARQ传输所对应的上行 ACK/NACK信息。 在本发明实施例的又一个优选实例中, 反馈模块 1104设置为在切换时, 在不同的 切换后的上行子帧上反馈不同的 HARQ 传输在切换前的最后一次传输所对应的上行 ACK/NACK信息。 优选地, 上行 ACK/NACK信息的反馈方式与长期演进 LTE和高级的长期演进 LTE-A 系统中上行 ACK/NACK 信息的反馈方式中的任何一种相同。 其中, 上行 ACK/NACK信息的反馈方式也可以采用实施例三中的反馈方式。 综上所述, 采用本发明实施例所述的方法, 可以很好地适用于基站到中继节点链 路,该方法在没有引入信令开销的同时,既保证了后向兼容性(例如,兼容 LTE系统), 也解决了中继链路子帧配置切换时上行 ACK/NACK如何反馈的问题。 显然, 本领域的技术人员应该明白, 上述的本发明的各模块或各步骤可以用通用 的计算装置来实现, 它们可以集中在单个的计算装置上, 或者分布在多个计算装置所 组成的网络上, 可选地, 它们可以用计算装置可执行的程序代码来实现, 从而, 可以 将它们存储在存储装置中由计算装置来执行, 并且在某些情况下, 可以以不同于此处 的顺序执行所示出或描述的步骤, 或者将它们分别制作成各个集成电路模块, 或者将 它们中的多个模块或步骤制作成单个集成电路模块来实现。 这样, 本发明不限制于任 何特定的硬件和软件结合。 以上所述仅为本发明的优选实施例而已, 并不用于限制本发明, 对于本领域的技 术人员来说, 本发明可以有各种更改和变化。 凡在本发明的精神和原则之内, 所作的 任何修改、 等同替换、 改进等, 均应包含在本发明的保护范围之内。

Claims

权 利 要 求 书
1. 一种中继链路子帧配置切换时确认信息的反馈方法, 包括:
在中继链路子帧配置切换时, 如果一个或多个下行混合自动重传请求
HARQ 传输在所述切换前的最后一次传输所对应的上行确认 /非确认 ACK/NACK信息未在所述切换前的上行子帧上反馈,则在所述最后一次传输之 后的 N毫秒以后的可用的切换后的上行子帧上反馈所述 ACK/NACK信息, 其 中, N为整数。
2. 根据权利要求 1所述的方法, 其中, 所述可用的切换后的上行子帧为所述最后 一次传输之后的 N毫秒以后的第一个可用的切换后的上行子帧。
3. 根据权利要求 1所述的方法, 其中, N=4。
4. 根据权利要求 1所述的方法, 其中, 在所述切换时, 多个所述下行 HARQ传输 在所述切换前的最后一次传输所对应的上行 ACK/NACK信息在相同的切换后 的上行子帧上反馈。
5. 根据权利要求 1所述的方法,其中,在所述切换时,一个或多个所述下行 HARQ 传输在所述切换前最后一次传输所对应的未在所述切换前的上行子帧上反馈的 上行 ACK/NACK信息和切换后的一个或多个下行 HARQ 传输所对应的上行 ACK/NACK信息在相同的切换后的上行子帧上反馈。
6. 根据权利要求 1所述的方法, 其中, 在所述切换时, 不同的所述 HARQ传输在 所述切换前的最后一次传输所对应的上行 ACK/NACK信息在不同的切换后的 上行子帧上反馈。
7. 根据权利要求 1至 6中任一项所述的方法, 其中, 所述上行 ACK/NACK信息 的反馈方式与长期演进 LTE和高级的长期演进 LTE-A系统中上行 ACK/NACK 信息的反馈方式中的任何一种相同。
8. 根据权利要求 1至 6中任一项所述的方法, 其中, 所述上行 ACK/NACK信息 的反馈方式为以下至少一种:
格式 format 1/1 a/lb: 待反馈的所述上行 ACK/NACK信息在频率、 时间方 向上扩频后承载在对应的资源上进行反馈; format 2/2a/2b: 待反馈的所述上行 ACK/NACK信息承载在解调参考符号 DMRS的正交频分复用 OFDM符号对应的资源上进行反馈;
format 3: 待反馈的所述上行 ACK/NACK信息在时间方向上扩频后承载在 对应的资源上进行反馈。
9. 一种中继链路子帧配置切换时确认信息的反馈装置, 包括:
确定模块, 设置为在中继链路子帧配置切换时, 确定一个或多个下行混合 自动重传请求 HARQ传输在所述切换前的最后一次传输所对应的上行确认 /非 确认 ACK/NACK信息未在所述切换前的上行子帧上反馈;
反馈模块, 设置为在所述最后一次传输之后的 N毫秒以后的可用的切换后 的上行子帧上反馈所述 ACK/NACK信息, 其中, N为整数。
10. 根据权利要求 9所述的装置, 其中, 所述反馈模块, 设置为在所述最后一次传 输之后的 N 毫秒以后的第一个可用的切换后的上行子帧上反馈所述 ACK/NACK信息。
11. 根据权利要求 9所述的装置, 其中, N=4。
12. 根据权利要求 9所述的装置, 其中, 所述反馈模块设置为在所述切换时, 在相 同的切换后的上行子帧上反馈多个所述下行 HARQ 传输在所述切换前的最后 一次传输所对应的上行 ACK/NACK信息。
13. 根据权利要求 9所述的装置, 其中, 所述反馈模块设置为在所述切换时, 在相 同的切换后的上行子帧上反馈一个或多个所述下行 HARQ 传输在所述切换前 最后一次传输所对应的未在所述切换前的上行子帧上反馈的上行 ACK/NACK 信息和切换后的一个或多个下行 HARQ传输所对应的上行 ACK/NACK信息。
14. 根据权利要求 9所述的装置, 其中, 所述反馈模块设置为在所述切换时, 在不 同的切换后的上行子帧上反馈不同的所述 HARQ 传输在所述切换前的最后一 次传输所对应的上行 ACK/NACK信息。
15. 根据权利要求 9至 14中任一项所述的装置, 其中, 所述上行 ACK/NACK信息 的反馈方式与长期演进 LTE和高级的长期演进 LTE-A系统中上行 ACK/NACK 信息的反馈方式中的任何一种相同。
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