WO2012089145A1 - 无线链路信号的更软合并方法和设备 - Google Patents

无线链路信号的更软合并方法和设备 Download PDF

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Publication number
WO2012089145A1
WO2012089145A1 PCT/CN2011/084935 CN2011084935W WO2012089145A1 WO 2012089145 A1 WO2012089145 A1 WO 2012089145A1 CN 2011084935 W CN2011084935 W CN 2011084935W WO 2012089145 A1 WO2012089145 A1 WO 2012089145A1
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Prior art keywords
serving base
related information
value related
llr
soft value
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PCT/CN2011/084935
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English (en)
French (fr)
Inventor
王宗杰
刘铮
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华为技术有限公司
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Publication of WO2012089145A1 publication Critical patent/WO2012089145A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
    • H04B7/0842—Weighted combining
    • H04B7/0848—Joint weighting
    • H04B7/0857—Joint weighting using maximum ratio combining techniques, e.g. signal-to- interference ratio [SIR], received signal strenght indication [RSS]

Definitions

  • the present invention relates to the field of mobile communications, and more particularly to a softer combining method and apparatus for wireless link signals.
  • WCDMA Wideband Code Division Multiple Access
  • HSPA High Speed Packet Access
  • HSDPA High Speed Downlink Packet Access
  • HSUPA High Speed Uplink Packet Access
  • the physical layer and media access control (MAC) layer mainly includes: shorter transmission time interval ( ⁇ , Transmission Time Interval), New High Speed Downlink Shared Channel (HS-DSCH); Introducing 16QAM modulation, code division multiplexing and time division multiplexing, new uplink control channel, adaptive modulation and coding to achieve fast link Adaptation, use Hybrid Automatic Repeat ReQuest (HQ) and Node-based
  • the above-mentioned wideband code division multiple access HSDP A is an optimization and evolution of the WCDMA downlink for packet services.
  • the uplink is optimized and evolved for packet services, and HSUPA technology is introduced.
  • HSUPA uses HARQ, Node B-based fast scheduling, and 2ms (millisecond) ⁇ short frame transmission.
  • HSUPA enables the maximum uplink data throughput rate of a single cell to reach 5.76 Mbit/s, which greatly enhances the data service carrying capacity and spectrum utilization of the WCDMA uplink.
  • HARQ is a combination of forward error correction (FEC) technology and automatic repeat request (ARQ) technology, that is, cyclic redundancy check (CRC) is performed on each data block at the transmitting end. Cyclic Redundancy Check) and attach the CRC sequence to the data block, which is channel encoded and sent.
  • FEC forward error correction
  • ARQ automatic repeat request
  • Cyclic Redundancy Check Cyclic Redundancy Check
  • Attach the CRC sequence to the data block, which is channel encoded and sent.
  • the receiving end device After receiving the channel decoding, the receiving end device performs the same CRC on the obtained data block and compares it with the additional CRC sequence. If the same, it indicates that the receiving is correct, and the receiving end returns an acknowledgment (ACK) signal; if not, Indicates a reception error, and the receiver returns a non-acknowledgement (NACK) signal.
  • ACK acknowledgment
  • NACK non-acknowledgement
  • the HARQ introduced in HSUPA ensures that the receiving end can receive the correct data block to a certain extent.
  • the existing uplink uses soft handover technology, that is, the user equipment (UE, User Equipment) transmits signals to all NodeBs in the active set, as long as When at least one of all NodeBs in the active set feeds back an ACK to the UE, the UE determines an ACK; when all NodeBs in the active set feed back a NACK to the UE, the UE determines a NACK.
  • the user equipment UE, User Equipment
  • Embodiments of the present invention provide a softer combining method and apparatus for wireless link signals to obtain a maximum signal to noise ratio of a wireless link signal.
  • An embodiment of the present invention provides a softer combining method for a radio link signal, including: a primary serving base station receiving a log likelihood ratio LLR soft value obtained by decoding, by a secondary serving base station in activating set, a data frame sent by a user equipment Related information or LLR soft value related information obtained after the LLR soft value related information is optimized;
  • the primary serving base station performs a maximum ratio combining of the log likelihood ratio LLR soft value related information obtained by decoding the data frame itself and the received LLR soft value related information of the secondary serving base station, and then inputs the decoder into a decoder. .
  • An embodiment of the present invention provides a retransmission judging method, including: receiving channel state information fed back by all serving base stations in an active set; determining, according to the channel state information and a length of a transport block sent before the current time, whether to retransmit the Transport block.
  • An embodiment of the present invention provides a primary serving base station, including: a receiving module, configured to receive a log likelihood ratio LLR soft value related information or a location obtained by decoding, after decoding, a data frame sent by a user equipment by all secondary serving base stations in an active set The LLR soft value related information obtained by optimizing the LLR soft value related information; the maximum ratio combining module, the log likelihood ratio LLR soft value related information obtained by decoding the data frame itself and the The log likelihood ratio LLR soft value related information received by the receiving module is subjected to maximum ratio combining and input to the decoder.
  • An embodiment of the present invention provides a user equipment, including: a receiving module, configured to receive channel state information fed back by all serving base stations in an active set; and a retransmission determining module, configured to receive channel state information and current time according to the receiving module The length of the previously transmitted transport block determines whether the transport block is retransmitted.
  • the foregoing solution fully utilizes related information of other serving base stations.
  • the LLR soft of the same data frame received on other links can still be utilized.
  • the value-related information obtains the maximum diversity gain and correctly decodes the data frame, thereby improving the reliability of data transmission.
  • FIG. 1 is a schematic flowchart of a softer merging method for a radio link signal according to an embodiment of the present invention
  • FIG. 2 is a schematic flowchart of a retransmission judging method according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of a logical structure of a primary serving base station according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of a logical structure of a primary serving base station according to another embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a logical structure of a primary serving base station according to another embodiment of the present invention.
  • FIG. 6 is a schematic diagram of a logical structure of a primary serving base station according to another embodiment of the present invention.
  • FIG. 7 is a schematic diagram of a logical structure of a user equipment according to an embodiment of the present invention.
  • FIG. 8 is a schematic diagram of a logical structure of a user equipment according to another embodiment of the present invention.
  • FIG. 1 it is a schematic flowchart of a softer merging method for a radio link signal according to an embodiment of the present invention, which may be as follows.
  • the primary serving base station receives data sent by the secondary serving base station to the user equipment in the active set.
  • the LLR soft value related information obtained after the frame is decoded and the LLR soft value related information or the LLR soft value related information is optimized.
  • an active set is a collection of cells that establish a connection with a mobile station (MS, Mobile Station) or user equipment (UE, User Equipment).
  • the activation set includes two types of base stations: a primary serving base station (NodeB) and a secondary serving base station (NodeB), and the UE or the MS simultaneously sends data to the primary serving NodeB and the secondary serving NodeB.
  • the primary service NodeB and the secondary service NodeB demodulate and decode the frame data. Feed.
  • both the primary serving NodeB and the secondary serving NodeB feed back an acknowledgement (ACK) message to the UE. If neither the primary serving NodeB nor the secondary serving NodeB can correctly decode, the primary service Both the NodeB and the secondary serving NodeB feed back a non-acknowledgement (NACK) message to the UE. If one of the primary serving NodeB and the secondary serving NodeB is correctly decoded and the other cannot be correctly decoded, the correctly decoded NodeB feeds back a confirmation to the UE.
  • ACK acknowledgement
  • NACK non-acknowledgement
  • ACK acknowledgement
  • NACK non-acknowledgement
  • the primary serving NodeB and the secondary serving NodeB also feed back the respective channel state information (CSI, Channel State Information) to the UE, where the CSI includes the signal to noise ratio of one frame of data transmitted by the UE. ( SNR, Signal Noise Ratio )
  • the enhanced absolute grant channel may be adopted.
  • E-AGCH E-DCH Absolute Grant CHannel
  • E-AGCH E-DCH Absolute Grant CHannel
  • the CSI bearer can fully utilize the downlink code on the E-AGCH channel.
  • the resource does not need to additionally increase the overhead of the code channel resource. Therefore, when the E-AGCH is used to carry the CSI, the CSI bearer may be selected to be transmitted on the E-AGCH at the idle moment of the maximum grant information.
  • the logarithmic likelihood ratio (LLR, Log Likelihood Ratio) soft value information of the auxiliary service NodeB can be This is determined after the current frame is decoded, for example, by taking the logarithm of the SNR of the current frame.
  • the delay of the Iub interface does not affect the HARQ process of the physical layer.
  • the primary serving base station compares the LLR soft value related information obtained by decoding the data frame by itself with the LLR soft value related information obtained by the secondary serving base station after decoding the data frame, and then inputs the decoder into the decoder.
  • the LLR soft value related information for performing the maximum ratio combining includes the LLR soft value related information obtained by decoding the data frame sent by the primary service NodeB to the UE (or the MS), and the secondary service NodeB to the UE.
  • the LLR soft value related information is all relevant information reflecting the channel quality condition, for example, signal to noise ratio (SNR).
  • SNR signal to noise ratio
  • the maximum ratio combining of LLR soft value related information is mainly based on the fact that a transmission symbol is dispersed into different transmission paths due to multipath propagation, and the time at which these energy reaches the receiving end through these paths is also Not the same.
  • the method of maximum ratio combining is to first collect different paths of the transmission symbols (for example, a transmission symbol in the embodiment of the present invention passes through all the secondary service base stations), calculate the sum of the path energy, and calculate each path in the total energy. The proportion is then multiplied by the signal-to-noise ratio (SNR) of the path at which the transmission symbol is transmitted. Finally, the result of accumulating these products according to the number of paths is the result of the maximum ratio combining.
  • SNR signal-to-noise ratio
  • the primary serving NodeB obtains the maximum ratio of the LLR soft value related information obtained by decoding the data frame frame sent by the UE to the LLR soft value related information obtained by the secondary service NodeB after decoding the data frame.
  • these LLR soft value related information can be aligned and added according to the bit position of the source information.
  • the source information is initial information generated by the terminal and not subjected to an encoding operation, and related technologies include source coding and channel coding, where the source coding encodes the original information before the source information is sent to the channel, Decrease d, redundant information, and improve transmission efficiency.
  • the LLR soft value related information sent by the secondary service NodeB is not necessarily the LLR soft value related information obtained after decoding the current data frame sent by the UE. For example, if the secondary service NodeB receives the SNR of the data frame below a certain threshold, the secondary service NodeB does not immediately send the LLR soft value related information to the primary serving NodeB.
  • the secondary service NodeB merges the SNR of the data frame retransmitted by the UE with the HARQ mechanism and the SNR of the previously decoded data frame, and determines whether the combined SNR is lower than a certain threshold; If the combined SNR is still lower than the certain threshold, the process is repeated until the combined SNR is higher than the certain threshold within the maximum number of transmissions set by the HARQ mechanism; the secondary service NodeB will be high.
  • the LLR soft value related information obtained by calculating the SNR of the certain threshold (for example, logarithmically calculating the combined SNR) is sent to the primary service NodeB.
  • the primary serving NodeB is the LLR ratio soft value information obtained by decoding all the secondary service NodeBs in the active set to decode the data frame sent by the UE, and the LLR ratio soft value information is compared with itself.
  • the LLR soft value related information obtained after decoding the data frame is subjected to maximum ratio combining. Therefore, the present invention makes full use of the related information of other service NodeBs.
  • the LLR soft value related information of the same data frame received on other links can still be utilized. The maximum diversity gain is obtained, and the data frame is correctly decoded, thereby improving the reliability of data transmission.
  • the LLR soft value related information mechanism obtained by the primary serving NodeB after receiving the decoding of the current frame by all the secondary service NodeBs may be as follows.
  • the secondary service NodeB Based on the request of the primary serving NodeB, the secondary service NodeB sends the LLR soft value related information, and the primary serving NodeB receives the LLR soft value related information obtained by all the secondary service NodeBs after decoding the current frame.
  • the primary serving NodeB receives the determination information of all the secondary service NodeBs after decoding the current frame. For example, if the decoding is correct, the determination information is an ACK message, otherwise it is a NACK message; if all the secondary service NodeBs decode the current frame, the determination information and After the primary service NodeB decodes the current frame, the determination information is a NACK message, and the primary serving NodeB sends the message to all the secondary service NodeBs.
  • All the secondary service NodeBs are required to feed back the LLR soft value related information signaling; all the secondary service NodeBs feed back the LLR soft value related information obtained after decoding the current frame, and the primary serving base station receives the LLR soft value related information.
  • the information frame sent by all the secondary service NodeBs to the primary serving NodeB actually includes an acknowledgement control signaling frame and an LLR soft value related information frame.
  • all the secondary service NodeBs send an acknowledgment control signaling frame to the primary serving NodeB, and the acknowledgment control signaling frame includes the determination information that the secondary service NodeB decodes the current frame, that is, the ACK message or the NACK message, and confirms the control signaling frame.
  • the content is the basis for the primary service NodeB to further request the secondary service NodeB to feed back the LLR soft value related information to the primary service NodeB.
  • the acknowledgment control signaling frame includes all the ACK
  • the primary serving NodeB sends signaling to all the secondary serving NodeBs that all the secondary serving NodeBs are required to feed back the LLR soft-value related information
  • the secondary serving NodeB receives the signaling, and then feeds back to the primary serving NodeB.
  • the LLR soft value related information frame includes the LLR soft value related information, the first retransmission information, the version information, and the constellation rotation information obtained by the secondary service NodeB after decoding the data frame sent by the current UE.
  • the secondary service NodeB actively feeds back the LLR soft-value related information to the primary serving NodeB, that is, the secondary service NodeB serves the primary service whether the secondary service NodeB decodes the data frame sent by the current UE after the decoding information is an ACK message or a NACK message.
  • the NodeB feeds back the LLR soft value related information frame, and the primary serving NodeB extracts the LLR soft value related information obtained by decoding the data frame from all the secondary service NodeBs from the LLR soft value related information frame.
  • the LLR soft value related information frame includes the LLR soft value related information and the first retransmission information obtained by the secondary service NodeB after decoding the data frame sent by the current UE.
  • the determination information that the secondary service NodeB decodes the data frame sent by the current UE, that is, the ACK message or the NACK message is also included.
  • an interface for transmitting an acknowledgement control signaling frame and/or an LLR soft value related information frame between the primary serving NodeB and the secondary serving NodeB may be configured outside the existing WCDMA frequency band.
  • the secondary service NodeB may not have to serve the primary service.
  • the NodeB transmits the entire LLR soft value related information.
  • the LLR soft value related information also has a part corresponding to the system bit and a part corresponding to the redundant check bit (the part corresponding to the non-system bit), that is, the LLR soft value after the service NodeB demodulates the data frame.
  • the related information is divided into a part corresponding to the system bit and a part corresponding to the non-system bit.
  • the secondary service NodeB can delete some redundant check bits according to a certain puncturing algorithm.
  • the demodulated LLR soft value related information is reserved for the portion corresponding to the system bit, and the part corresponding to the non-system bit in the LLR soft value related information is deleted, and then the LLR remaining after the puncturing algorithm is transmitted only to the primary serving NodeB.
  • the part corresponding to the soft value related information system bit.
  • the auxiliary service NodeB samples the LLR soft value related information according to a certain sampling rate, and passes the sampled value of the LLR soft value related information obtained after the sample through the interface between the primary service NodeB and the secondary service NodeB (for example, , lub interface) sent to the main service NodeB.
  • the main service NodeB recovers the interpolation points between the samples based on a certain basis function (such as the sine function).
  • the auxiliary service NodeB calculates 100 LLR soft value related information, uniformly extracts the sample space, obtains 50 sample points, and transmits the 50 sample points to the main service NodeB through the lub interface.
  • the primary service NodeB adds the received two LLR soft value related information and averages them.
  • the obtained interpolation set is the 50 LLR soft value related information that the secondary service NodeB does not have.
  • the auxiliary service NodeB performs source coding on the LLR soft value related information according to the information theory rate distortion algorithm, and generates LLR soft value related information encoded information under the objective function with the smallest source information distortion.
  • the LLR soft value related information is compressed by the source and transmitted to the main service NodeB through the lub interface.
  • FIG. 2 a schematic flowchart of a retransmission judging method according to an embodiment of the present invention is provided.
  • the subject of execution may be a UE or an MS, and the main steps include:
  • the active/slave primary service NodeB and the secondary service NodeB demodulate and decode the data frame sent by the UE or the MS, according to whether the decoding is correct, ACK or NACK feedback is performed, and the primary service NodeB is simultaneously or after feeding back the ACK message or the NACK message.
  • the secondary service NodeB feeds back the channel state information (CSI) to the UE, where the CSI includes the SNR of the data frame sent by the UE.
  • CSI channel state information
  • the basis for determining whether to retransmit the transport block by the UE may be represented by a discriminant function, which discriminates the factors according to which factors.
  • CSI k represents channel state information fed back by the kth serving NodeB
  • TBS represents the length of the transmitted block
  • CSI k and TBS are arguments of the discriminant function f.
  • the UE may calculate the probability of the erroneous decoding of the transport block sent before the current time at the receiving end (ie, the primary serving NodeB and the secondary serving NodeB) according to the channel state information CSI k and the length TBS of the transport block sent before the current time.
  • the CSI information includes an SNR value, which can be represented by a 5-bit index value.
  • the index table determines whether the transport block transmitted before the current time can be correctly decoded by the primary serving NodeB and the secondary serving NodeB in the case of the currently calculated SNR combined value.
  • the following modulation modes are QPSK and 4PAM as an example to illustrate the decision process of the embodiment of the present invention. It should be understood by those skilled in the art that the present invention is merely an exemplification, and is not limited to the present invention, and may be applied to other modulation modes.
  • TTI Transmission Time Interval
  • the transport block sent before the current time in the two modulation modes can be obtained at the receiving end (ie, the main service) NodeB and secondary service NodeB) probability of error decoding.
  • the empirical mapping table may be a numerical relationship table between the block error rate SNR and the block length TBS obtained according to the signal-to-noise ratio SNR and the transmission block length TBS in the past engineering practice.
  • the UE If the probability that the transmission block sent before the current time is incorrectly decoded at the receiving end is less than the set threshold, that is, the value of the discriminant function f is less than a set threshold, the UE considers that the receiving end can correctly decode, ie, The UE determines that the transport block does not need to be retransmitted. Otherwise, it determines that the transport block needs to be retransmitted according to the situation of the NACK in the HARQ process, and retransmits the transport block sent before the current time.
  • the threshold set by the UE for the decision function should be consistent with the decision threshold of the primary serving NodeB and the secondary serving NodeB decoder.
  • FIG. 3 it is a schematic diagram of a logical structure of a primary serving base station according to an embodiment of the present invention. For the convenience of description, only the parts related to the embodiment of the present invention are shown. 3 is a functional module/unit in a main service base station.
  • the unit/unit may be a software module/unit, a hardware module/unit or a combination of hardware and software modules/units, which includes a receiving module 301 and a maximum ratio combining module 302.
  • the receiving module 301 is configured to receive, by using, all the secondary service NodeBs in the active set to send to the user equipment.
  • the LLR soft value related information obtained after the log likelihood ratio LLR soft value related information or the LLR soft value related information obtained after the data frame is decoded is optimized.
  • the maximum ratio combining module 302 is configured to perform maximum ratio combining on the log likelihood ratio LLR soft value related information obtained by decoding the data frame by itself and the log likelihood ratio LLR soft value related information received by the receiving module 301. After inputting the decoder.
  • the receiving module 301 of the example of FIG. 3 may further include a first receiving unit 401, a signaling transmitting unit 402, and a second receiving unit 403, such as the primary serving base station provided by another embodiment of the present invention as shown in FIG.
  • the first receiving unit 401 is configured to receive, by the secondary service NodeB, the determination information after decoding the data frame.
  • the signaling sending unit 402 is configured to: if the decision information after decoding the data frame by all the secondary serving base stations and the determination information after the primary serving NodeB decodes the data frame are the acknowledgement information NACK, the primary serving NodeB sends the acknowledgement information to all the secondary service NodeBs. All secondary service NodeBs are required to feed back signaling of LLR soft value related information.
  • the second receiving unit 403 is configured to receive log likelihood ratio LLR soft value related information obtained by decoding the data frame by all the secondary service NodeBs.
  • the maximum ratio combining module 302 of the example of FIG. 3 may further include an adding unit 501, such as the primary serving base station provided by another embodiment of the present invention as shown in FIG. And an adding unit, configured to: after the main serving NodeB decodes the data frame sent by the UE to the UE, the log likelihood ratio LLR soft value related information and the logarithm of the auxiliary service NodeB after decoding the data frame However, the LLR soft value related information is added in accordance with the bit alignment of the source information.
  • an adding unit 501 such as the primary serving base station provided by another embodiment of the present invention as shown in FIG.
  • an adding unit configured to: after the main serving NodeB decodes the data frame sent by the UE to the UE, the log likelihood ratio LLR soft value related information and the logarithm of the auxiliary service NodeB after decoding the data frame
  • the LLR soft value related information is added in accordance with the bit alignment of the source information.
  • the primary serving base station illustrated in Figures 3 through 5 may further include a channel state information feedback module 601, such as the primary serving base station provided by another embodiment of the present invention, as shown in Figure 6.
  • the channel state information feedback module 601 is configured to feed back channel state information of the primary serving NodeB to the user equipment.
  • FIG. 7 is a schematic diagram of a logical structure of a user equipment according to an embodiment of the present invention.
  • the functional modules/units in the example user equipment of FIG. 7 may be software modules/units, hardware modules/units or a combination of hardware and software modules/units, including a receiving module 701 and a retransmission judging module 702.
  • the receiving module 701 is configured to receive channel state information fed back by all serving base stations in the active set.
  • the retransmission judging module 702 is configured to determine whether to retransmit the transport block according to the channel state information received by the receiving module 701 and the length of the transport block sent before the current time.
  • the retransmission judging module 702 of the example of FIG. 7 may further include a probability calculation unit 801 and a judging unit 802, such as the user equipment provided by another embodiment of the present invention as shown in FIG.
  • the probability calculation unit 801 is configured to calculate, according to the channel state information and the length of the transmission block sent before the current time, the probability that the transmission block sent before the current time is erroneously decoded at the receiving end.
  • the determining unit 802 determines that the probability that the transport block sent before the current time is incorrectly decoded at the receiving end is less than the set threshold, and determines that the transport block does not need to be retransmitted, otherwise it is determined that the transport block needs to be retransmitted.
  • the program can be stored in a computer readable storage medium.
  • the storage medium can include: Read Only Memory (ROM), Random Access Memory (RAM), disk or optical disk.

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Description

无线链路信号的更软合并方法和设备 本申请要求于 2010年 12月 29日提交中国专利局、 申请号为 201010612849.6、 发明名称为 "无线链路信号的更软合并方法和设备" 的中 国专利申请的优先权， 其全部内容通过引用结合在本申请中。
技术领域 本发明涉及移动通信领域， 尤其涉及无线链路信号的更软合并方法和 设备。 背景技术 随着通信技术的飞速发展， 宽带码分多址（WCDMA, Wideband Code Division Multiple Access )作为第三代移动通信系统的主流技术之一， 在全 球范围内得到了广泛的研究和应用。
为了提高数据传输速率， 满足不同的需求， WCDMA釆用了高速分组 接入（HSPA, High Speed Packet Access )技术， 包括高速下行分组接入 ( HSDPA , High Speed Downlink Packet Access )技术和高速上行分组接入 ( HSUPA , High Speed Uplink Packet Access )技术， 其中， 引入的 HSDPA 技术， 使得下行链路能够实现高达 14.4Mbit/s的速度。 为改善 WCDMA系统 性能， HSDPA在无线接口上作了大量增强， 体现在物理层和媒体接入控制 ( MAC, Media Access Control )层主要包括： 更短的传输时间间隔 （ ΤΉ, Transmission Time Interval )、新的高速下行共享信道（ HS-DSCH, High Speed Downlink Shared Channel ) ； 引入 16QAM调制、 码分复用和时分复用相结 合、 新的上行控制信道、 釆用自适应调制和编码实现快速链路适配、 使用 混合自动重复请求（ HARQ, Hybrid Automatic Repeat reQuest )以及基于 Node
B的快速调度等。 上述宽带码分多址的 HSDP A是 WCDMA下行链路针对分组业务的优化 和演进。 而在宽带码分多址中， 对上行链路针对分组业务进行优化和演进， 引入了 HSUPA技术。 与 HSDPA技术类似， HSUPA釆用了 HARQ、基于 Node B的快速调度和 2ms (毫秒） ΤΉ短帧传输。 HSUPA使得单小区最大上行数 据吞吐率达到 5.76Mbit/s, 大大增强了 WCDMA上行链路的数据业务承载能 力和频谱利用率。
HARQ是前向纠错 (FEC, Forward Error Correction)技术和自动重传请求 ( ARQ , Automatic Repeat Request )技术两者的结合， 即， 在发送端对每个 数据块进行循环冗余检验（CRC, Cyclic Redundancy Check )并将 CRC序列 附加到数据块， 经过信道编码后发送。 在接收端， 接收端设备进行信道解 码后， 对得到的数据块进行同样的 CRC并与附加的 CRC序列进行比较， 若 相同， 表明接收正确， 接收端返回确认（ACK )信号； 若不相同， 表明接 收错误， 接收端返回不确认（NACK )信号。 当发送端收到 ACK信号， 就 发送新的数据块， 否则重新发送上次传输的数据块。
HSUPA中引入的 HARQ, 在一定程度上保证了接收端能够接收到正确 的数据块。
为了提高上行链路的覆盖范围， 降低上行链路的中断概率， 现有的上 行链路釆用了软切换技术， 即， 用户设备（ UE , User Equipment )向激活集 中的所有 NodeB传输信号， 只要激活集中所有 NodeB至少有一个向 UE反馈 ACK时， UE判定 ACK; 当激活集中所有 NodeB都向 UE反馈 NACK时， UE 判定 NACK。
上述现有软切换技术没有充分利用其他译码错误链路的有用信号的相 关能量， 不能获得最大信噪比， 数据传输的可靠性比较低。 发明内容 本发明实施例提供无线链路信号的更软合并方法和设备， 以获得无线 链路信号最大信噪比。
本发明实施例提供一种无线链路信号的更软合并方法， 包括： 主服务 基站接收激活集内所有辅服务基站对用户设备发送的数据帧解码后求得的 对数似然比 LLR软值相关信息或所述 LLR软值相关信息经过优化处理后所 得的 LLR软值相关信息；
所述主服务基站将自身对所述数据帧解码后求得的对数似然比 LLR软 值相关信息与其接收的所述辅服务基站的 LLR软值相关信息进行最大比合 并后输入译码器。
本发明实施例提供一种重传判断方法， 包括： 接收激活集内所有服务 基站反馈的信道状态信息； 根据所述信道状态信息和当前时刻之前发送的 传输块的长度， 判断是否重传所述传输块。
本发明实施例提供一种主服务基站， 包括： 接收模块， 用于接收激活 集内所有辅服务基站对用户设备发送的数据帧解码后求得的对数似然比 LLR软值相关信息或所述 LLR软值相关信息经过优化处理后所得的 LLR软 值相关信息； 最大比合并模块， 用于将自身对所述数据帧解码后求得的对 数似然比 LLR软值相关信息与所述接收模块接收的对数似然比 LLR软值相 关信息进行最大比合并后输入译码器。
本发明实施例提供一种用户设备， 包括： 接收模块， 用于接收激活集 内所有服务基站反馈的信道状态信息； 重传判断模块， 用于根据所述接收 模块接收的信道状态信息和当前时刻之前发送的传输块的长度， 判断是否 重传所述传输块。
从上述方案可知， 上述方案充分利用了其他服务基站的相关信息， 在 主服务基站所在的链路的接收的数据帧不能正确解码时， 仍然可以利用其 他链路上接收的同一数据帧的 LLR软值相关信息获得最大分集增益，正确解 码数据帧， 从而提高数据传输的可靠性。 附图说明 为了更清楚地说明本发明实施例的技术方案， 下面将对现有技术或实 施例描述中所需要使用的附图作简单地介绍， 显而易见地， 下面描述中的 附图仅仅是本发明的一些实施例， 对于本领域普通技术人员来讲， 在不付 出创造性劳动性的前提下， 还可以如这些附图获得其他的附图。
图 1是本发明实施例提供的无线链路信号的更软合并方法流程示意图； 图 2是本发明实施例提供的一种重传判断方法流程示意图；
图 3是本发明实施例提供的主服务基站逻辑结构示意图；
图 4是本发明另一实施例提供的主服务基站逻辑结构示意图；
图 5是本发明另一实施例提供的主服务基站逻辑结构示意图；
图 6是本发明另一实施例提供的主服务基站逻辑结构示意图；
图 7是本发明实施例提供的用户设备逻辑结构示意图；
图 8是本发明另一实施例提供的用户设备逻辑结构示意图。
具体实施方式 下面将结合本发明实施例中的附图， 对本发明实施例中的技术方案进 行清楚、 完整地描述， 显然， 所描述的实施例仅仅是本发明一部分实施例， 而不是全部的实施例。 基于本发明中的实施例， 本领域普通技术人员在没 有做出创造性劳动前提下所获得的所有其他实施例， 都属于本发明保护的 范围。
请参阅附图 1 , 是本发明一实施例提供的无线链路信号的更软合并方法 流程示意图， 可以如下所述。
101 , 主服务基站接收激活集内所有辅服务基站对用户设备发送的数据 帧解码后求得的对数似然比 LLR软值相关信息或所述 LLR软值相关信息经 过优化处理后所得的 LLR软值相关信息。
例如， 激活集是与移动台 （ MS , Mobile Station ) 或用户设备 ( UE , User Equipment )建立连接的小区的集合。 例如， 在本发明实施例中， 激 活集内包含主服务基站 （NodeB )和辅服务基站 （NodeB ) 两类基站， UE 或 MS同时向主服务 NodeB和辅服务 NodeB发送数据。 主服务 NodeB和辅服 务 NodeB接收到 UE发送的同一帧数据后， 对该帧数据进行解调解码。 馈。 如果主服务 NodeB和辅服务 NodeB均能够正确译码， 则主服务 NodeB和 辅服务 NodeB均向 UE反馈一个确认（ ACK ) 消息， 如果主服务 NodeB和辅 服务 NodeB均不能够正确译码，主服务 NodeB和辅服务 NodeB均向 UE反馈一 个非确认（NACK ) 消息， 如果主服务 NodeB和辅服务 NodeB其中一个正确 译码， 另一个不能正确译码， 则能正确译码的 NodeB向 UE反馈一个确认
( ACK )消息，另一个不能正确译码的 NodeB向 UE反馈一个非确认（ NACK ) 消息。 在反馈 ACK或 NACK的同时或之后， 主服务 NodeB和辅服务 NodeB还 把各自的信道状态信息（ CSI, Channel State Information )反馈给 UE, 其中， CSI包含 UE发送的一帧数据时的信噪比（ SNR, Signal Noise Ratio )„ 在本发 明一个实施例中， 为了使 UE获知上行链路的信道信息， 并根据信道信息判 断 CSI对应的数据帧有没有传输错误， 可以通过增强型绝对授权信道
( E-AGCH, E-DCH Absolute Grant CHannel )将 CSI发送至 UE; 进一步地， 考虑到 E-AGCH通常有较大的空闲时间， CSI承载在 E-AGCH信道上可以充 分利用下行链路的码资源， 而不需要额外增加码道资源的开销， 因此， 当 使用 E-AGCH承载 CSI时，可以选择在最大授权信息的空闲时刻将 CSI承载在 E-AGCH上传输。
辅服务 NodeB的对数似然比 （LLR, Log Likelihood Ratio )软值信息可 以是当前帧解码后求得， 例如， 通过对当前帧的 SNR取对数求得。
由于激活集中的所有服务 NodeB各自向 UE传输 CSI, 代替主服务 NodeB 反馈的 NACK消息， 因此使得 Iub口的时延不会影响物理层的 HARQ过程。
S102, 主服务基站将自身对数据帧解码后求得的 LLR软值相关信息与 辅服务基站对该数据帧解码后求得的 LLR软值相关信息进行最大比合并后 输入译码器。
在本发明实施例中，进行最大比合并的 LLR软值相关信息既包括主服务 NodeB对 UE (或 MS )发送的数据帧解码后求得的 LLR软值相关信息， 又包 括辅服务 NodeB对 UE发送的数据帧解码后求得的 LLR软值相关信息。 LLR 软值相关信息是反映信道质量情况的所有相关信息， 例如， 信噪比（SNR, Signal Noise Ratio )等。 而对 LLR软值相关信息进行最大比合并主要是基于 这样一个事实， 即， 一个传输符号由于多径传播， 其能量被分散到不同的 传输路径上， 并且这些能量通过这些路径到达接收端的时间也不相同。 最 大比合并的方法就是先将这个传输符号的不同路径 （例如， 本发明实施例 中一个传输符号经过所有辅服务基站）先收集起来， 统计路径能量的总和， 并且计算每条路径在总能量中所占的比例， 然后将这个比例乘以该条路径 在传输这个传输符号时刻的信噪比（SNR ), 最后将这些乘积按照路径数累 加起来的结果即为最大比合并的结果。
作为本发明一个实施例， 主服务 NodeB将自身对 UE发送的数据帧帧解 码后求得的 LLR软值相关信息与辅服务 NodeB对该数据帧解码后求得的 LLR软值相关信息进行最大比合并时，可以将这些 LLR软值相关信息按照源 信息的比特位对齐相加。 其中， 源信息是终端产生并且没有经过编码运算 的初始信息， 与此相关涉及的技术包括信源编码和信道编码， 其中信源编 码是在源信息发送到信道之前对该原信息进行编码， 以减 d、信息的冗余度 , 提高传输效率。 需要说明的是， 辅服务 NodeB发送的 LLR软值相关信息不一定是对 UE 发送的当前数据帧解码后求得的 LLR软值相关信息。 例如， 若辅服务 NodeB 收到数据帧的 SNR低于某个门限值， 则该辅服务 NodeB并不立即向主服务 NodeB发送 LLR软值相关信息。在数据帧译码错误时，辅服务 NodeB合并 UE 利用 HARQ机制重传过来的数据帧的 SNR与之前译码错误的数据帧的 SNR, 判决合并后的 SNR是否低于某个门限值；若合并后的 SNR仍然低于该某个门 限值， 则重复上述过程，直到在 HARQ机制设定的最大传输次数内合并所得 的 SNR高于该某个门限值为止；辅服务 NodeB将对高于该某个门限值的 SNR 计算 (例如， 对合并所得的 SNR进行对数计算）求得的 LLR软值相关信息发 送至主服务 NodeB。
从上述本发明实施例可知，由于主服务 NodeB是接收激活集内所有辅服 务 NodeB对 UE发送的数据帧解码后求得的 LLR比软值信息， 并且是将这些 LLR比软值信息与自身对该数据帧解码后求得的 LLR软值相关信息进行最 大比合并。 因此， 本发明充分利用了其他服务 NodeB的相关信息， 在主服务 NodeB所在的链路的接收的数据帧不能正确解码时，仍然可以利用其他链路 上接收的同一数据帧的 LLR软值相关信息获得最大分集增益 ,正确解码数据 帧， 从而提高数据传输的可靠性。
在本发明实施例中，主服务 NodeB接收所有辅服务 NodeB对当前帧解码 后求得的 LLR软值相关信息机制可以如下所述。
机制一： 基于主服务 NodeB的请求， 辅服务 NodeB发送 LLR软值相关信 息， 主服务 NodeB接收所有辅服务 NodeB对当前帧解码后求得的 LLR软值相 关信息。 例如， 主服务 NodeB接收所有辅服务 NodeB对当前帧解码后的判定 信息， 例如， 解码正确的话， 判定信息是 ACK消息， 否则是 NACK消息； 若所有辅服务 NodeB对当前帧解码后的判定信息和主服务 NodeB对当前帧 解码后的判定信息均是 NACK消息， 则主服务 NodeB向所有辅服务 NodeB发 送要求所有辅服务 NodeB反馈 LLR软值相关信息的信令； 所有辅服务 NodeB 反馈对当前帧解码后求得的 LLR软值相关信息， 主服务基站接收这一 LLR 软值相关信息。 在本机制一中， 所有辅服务 NodeB向主服务 NodeB发送的信 息帧实际包括确认控制信令帧和 LLR软值相关信息帧。 首先， 所有辅服务 NodeB向主服务 NodeB发送确认控制信令帧，确认控制信令帧中包含辅服务 NodeB对当前帧解码后的判定信息， 即 ACK消息或 NACK消息，确认控制信 令帧中的内容是主服务 NodeB进一步要求辅服务 NodeB是否向主服务 NodeB反馈 LLR软值相关信息的依据。 若确认控制信令帧包含的都是 ACK 主服务 NodeB向所有辅服务 NodeB发送要求所有辅服务 NodeB反馈 LLR软值 相关信息的信令， 辅服务 NodeB接收到该信令后， 向主服务 NodeB反馈 LLR 软值相关信息帧， 其中包含辅服务 NodeB对当前 UE发送的数据帧解码后求 得的 LLR软值相关信息、 第几次重传信息、 版本信息和星座旋转信息等等。
机制二：辅服务 NodeB主动向主服务 NodeB反馈 LLR软值相关信息，即， 无论辅服务 NodeB对当前 UE发送的数据帧解码后的判定信息是 ACK消息还 是 NACK消息， 辅服务 NodeB都向主服务 NodeB反馈 LLR软值相关信息帧， 主服务 NodeB从 LLR软值相关信息帧中解出所有辅服务 NodeB对数据帧解 码后求得的 LLR软值相关信息。 与机制一的 LLR软值相关信息帧不同， 此处 的 LLR软值相关信息帧除了包括辅服务 NodeB对当前 UE发送的数据帧解码 后求得的 LLR软值相关信息、第几次重传信息、版本信息和星座旋转信息等 之外， 还包括辅服务 NodeB对当前 UE发送的数据帧解码后的判定信息， 即 ACK消息或 NACK消息。
需要说明的是， 在本发明实施例中， 主服务 NodeB和辅服务 NodeB之间 传输确认控制信令帧和 /或 LLR软值相关信息帧的接口， 可以是在现有 WCDMA频段之外配置的一个窄带频率范围，也可以是 Iub之类的有线接口， 本发明对此不做限制。
为了减小在主服务 NodeB和辅服务 NodeB之间传输确认控制信令帧和 / 或 LLR软值相关信息帧的开销和缩短时延， 在本发明实施例中， 辅服务 NodeB可以不必向主服务 NodeB传输整个 LLR软值相关信息。
例如， 考虑到在对源信息比特经过编码操作后， 会产生信息位和冗余 校验位， 其中编码后的信息位就是系统位， 也是原来的源信息比特。 经过 LLR后， LLR软值相关信息中也会存在系统位对应的部分和冗余校验位对应 的部分（非系统位对应的部分）， 即， 服务 NodeB对数据帧解调后的 LLR软 值相关信息分为系统位对应的部分和非系统位对应的部分。 为了降低信息 源的冗余度， 辅服务 NodeB可以按照一定的凿孔算法删除某些冗余校验位。 例如，将解调后的 LLR软值相关信息保留系统位对应的部分，把 LLR软值相 关信息中非系统位对应的部分都删除， 然后， 只向主服务 NodeB传输凿孔算 法后剩余的 LLR软值相关信息系统位对应的部分。
又如， 辅服务 NodeB按照一定的釆样率对 LLR软值相关信息进行抽样， 将釆样后得到的 LLR软值相关信息的釆样值通过主服务 NodeB和辅服务 NodeB之间的接口 （例如， lub接口）发送至主服务 NodeB。 主服务 NodeB 根据一定的基函数（如 sine函数等）去恢复釆样点之间的插值点。举例而言， 辅服务 NodeB计算出 100个 LLR软值相关信息， 均匀抽取样本空间， 得到 50 个釆样点后将这 50个釆样点通过 lub接口传输至主服务 NodeB。 主服务 NodeB将接收到的每两个釆样 LLR软值相关信息相加后求平均，所得到的插 值集合即为辅服务 NodeB没有釆样的 50个 LLR软值相关信息。
再如，辅服务 NodeB根据信息论的率失真算法对 LLR软值相关信息进行 信源编码，在对源信息失真最小的目标函数下产生 LLR软值相关信息编码后 的信息。 将 LLR软值相关信息经过信源压缩后所得值通过 lub接口传输至主 服务 NodeB。 请参阅附图 2 , 本发明实施例提供的一种重传判断方法流程示意图。 在 附图 2示例的方法中， 执行的主体可以是 UE或 MS , 主要包括步骤：
5201 , 接收激活集内所有服务 NodeB反馈的信道状态信息。
激活集内主服务 NodeB和辅服务 NodeB对 UE或 MS发送的数据帧进行 解调解码后， 根据译码是否正确进行 ACK或 NACK反馈， 在反馈 ACK消息 或 NACK消息的同时或之后， 主服务 NodeB和辅服务 NodeB将各自的信道状 态信息 （CSI, Channel State Information )反馈至 UE, 其中， CSI包含 UE发 送的数据帧的 SNR。
5202 , 根据信道状态信息和当前时刻之前发送的传输块的长度， 判断 是否重传传输块。
为了描述问题的方便， 可以将 UE判断是否重传传输块的依据釆用一个 判别函数表示， 该判别函数给出了判断依据与哪些因素有关。 例如， 使用 判别函数可以 P = f ( CSIi, CSI2, CSIk, TBS )。 其中 CSIk表示第 k个服务 NodeB反馈的信道状态信息， TBS表示所传输块的长度， CSIk和 TBS都是判 别函数 f的自变量。 UE可以根据信道状态信息 CSIk和当前时刻之前发送的传 输块的长度 TBS , 计算当前时刻之前发送的传输块在接收端 （即主服务 NodeB和辅服务 NodeB )错误译码的概率。
在本发明实施例中， CSI信息包括 SNR值， 可以使用一个 5bit的索引值 表示。 UE对 k个服务 NodeB反馈的 SNR合并， 所得到的平均 SNR的公式为 SNR合并 =E[ (SNRi2+ ... +SNRk 2)/(SNRi+ ... +SNRk)] , UE根据索引表判决在当 前计算得到的 SNR合并值情况下， 当前时刻之前发送的传输块是否可以在主 服务 NodeB和辅服务 NodeB正确译码。 以下调制方式为 QPSK和 4PAM为例， 说明本发明实施例的判决过程。 本领域技术人员应当理解， 此处仅仅是一 个举例说明， 不失为对本发明的限制， 也可以适用于其他调制方式的情形。
QPSK的符号错误概率为 P4PAM=1.5 Q[(0.2 SNR合并) 5]， 4ΡΑΜ的符号 错误概率为 PQPSK=2 Q[ (2 SNR合并) 5 χ sin(0.785) ]。
假设误码分布满足泊松分布， 误码率为 Pe, 对于速率为 R的业务， 在一 个传输时间间隔（TTI, Transmission Time Interval ) 内有 n个误码的概率为：
p(n) = ( c-R*TTl*Pe
n\
c-K*Pe
η\
按照上述公式， 在一个 ΤΤΙ 内有没有误码 （即， η 为 0 ) 的概率为 P(0) = e- 因为所有的无线链路最后在主服务 NodeB进行合并， 相当于激活集为 1 , 因此， 判别函数 f的值可以使用 BJ£R = 1 -P(0) = l -e- 表示。
根据上式推算的符号错误概率和传输块的编码率， 对照经验映射表， 将 P4PAM和 PQPSK分别代入 时， 即可得到两种调制方式下当前时刻之前 发送的传输块在接收端（即主服务 NodeB和辅服务 NodeB )错误译码的概率。 在本发明实施例中， 经验映射表可以是在以往的工程实践中， 根据信噪比 SNR和传输块长 TBS得到的与误块率 BLER之间的一种数值关系表。
若当前时刻之前发送的传输块在接收端错误译码的概率小于设定门限 值， 即判别函数 f的值小于一个设定的门限值， 则 UE认为接收端可以正确译 码， 即， UE判断不需要重传传输块， 否则就会按照与 HARQ过程中 NACK 的情形， 判断需要重传传输块， 对当前时刻之前发送的传输块进行重传。
容易理解， UE为判决函数设置的门限值与主服务 NodeB、辅服务 NodeB 译码器的判决门限值应该保持一致。
请参阅附图 3 , 是本发明实施例提供的主服务基站逻辑结构示意图。 为 了便于说明， 仅仅示出了与本发明实施例相关的部分。 附图 3示例主服务基 站中的功能模块 /单元可以是软件模块 /单元、硬件模块 /单元或软硬件相结合 模块 /单元， 其包括接收模块 301和最大比合并模块 302。
接收模块 301 , 用于接收激活集内所有辅服务 NodeB对用户设备发送的 数据帧解码后求得的对数似然比 LLR软值相关信息或所述 LLR软值相关信 息经过优化处理后所得的 LLR软值相关信息。
最大比合并模块 302, 用于将自身对所述数据帧解码后求得的对数似然 比 LLR软值相关信息与接收模块 301接收的对数似然比 LLR软值相关信息进 行最大比合并后输入译码器。
附图 3示例的接收模块 301可以进一步包括第一接收单元 401、 信令发送 单元 402和第二接收单元 403 , 如附图 4所示本发明另一实施例提供的主服务 基站。
第一接收单元 401 , 用于接收所有辅服务 NodeB对数据帧解码后的判定 信息。
信令发送单元 402, 用于若所有辅服务基站对数据帧解码后的判定信息 和主服务 NodeB对该数据帧解码后的判定信息均是 确认信息 NACK ,则主 服务 NodeB向所有辅服务 NodeB发送要求所有辅服务 NodeB反馈 LLR软值相 关信息的信令。
第二接收单元 403 , 用于接收所有辅服务 NodeB对数据帧解码后求得的 对数似然比 LLR软值相关信息。
附图 3示例的最大比合并模块 302可以进一步包括相加单元 501 , 如附图 5所示本发明另一实施例提供的主服务基站。相加单元，用于将主服务 NodeB 将自身对 UE发送的数据帧解码后求得的对数似然比 LLR软值相关信息和辅 服务 NodeB对所述数据帧解码后求取的对数似然比 LLR软值相关信息按照 源信息的比特位对齐相加。
附图 3至附图 5示例的主服务基站可以进一步包括信道状态信息反馈模 块 601 , 如附图 6所示本发明另一实施例提供的主服务基站。 信道状态信息 反馈模块 601用于将主服务 NodeB的信道状态信息反馈至用户设备。
请参阅附图 7, 是本发明实施例提供的用户设备逻辑结构示意图。 为了 便于说明， 仅仅示出了与本发明实施例相关的部分。 附图 7示例用户设备中 的功能模块 /单元可以是软件模块 /单元、硬件模块 /单元或软硬件相结合模块 /单元， 其包括接收模块 701和重传判断模块 702。
接收模块 701 , 用于接收激活集内所有服务基站反馈的信道状态信息。 重传判断模块 702 , 用于根据接收模块 701接收的信道状态信息和当前 时刻之前发送的传输块的长度， 判断是否重传该传输块。
附图 7示例的重传判断模块 702可以进一步包括概率计算单元 801和判 断单元 802 , 如附图 7所示本发明另一实施例提供的用户设备。
概率计算单元 801 , 用于根据信道状态信息和当前时刻之前发送的传输 块的长度， 计算当前时刻之前发送的传输块在接收端错误译码的概率。
判断单元 802, 用于当前时刻之前发送的传输块在接收端错误译码的概 率小于设定门限值， 则判断不需要重传所述传输块， 否则判断需要重传所 述传输块。
需要说明的是， 上述装置各模块 /单元之间的信息交互、 执行过程等内 容， 由于与本发明方法实施例基于同一构思， 其带来的技术效果与本发明 方法实施例相同， 具体内容可参见本发明方法实施例中的叙述， 此处不再 赘述。
本领域普通技术人员可以理解上述实施例的各种方法中的全部或部分 步骤是可以通过程序来指令相关的硬件来完成， 该程序可以存储于一计算 机可读存储介质中， 存储介质可以包括： 只读存储器 （ROM, Read Only Memory )、 随机存取存储器 ( RAM, Random Access Memory )、 磁盘或光 盘等。
以上对本发明实施例提供的无线链路信号的更软合并方法和设备进行 述， 以上实施例的说明只是用于帮助理解本发明的方法及其核心思想； 同 时， 对于本领域的一般技术人员， 依据本发明的思想， 在具体实施方式及 应用范围上均会有改变之处， 综上所述， 本说明书内容不应理解为对本发 明的限制。

Claims

权利要求
1、 一种无线链路信号的更软合并方法， 其特征在于， 所述方法包括： 主服务基站接收激活集内所有辅服务基站发送的对数似然比 ( LLR )软 值相关信息或发送的 LLR软值相关信息经过优化处理后所得的 LLR软值相 关信息，其中，所述 LLR软值相关信息由激活集内辅服务基站对用户设备发 送的数据帧解码后求得；
所述主服务基站将自身对所述数据帧解码后求得的对数似然比 ( LLR ) 软值相关信息与其接收的所述辅服务基站的 LLR软值相关信息进行最大比 合并后输入译码器。
2、 如权利要求 1所述的方法， 其特征在于， 所述主服务基站接收激活 集内所有辅服务基站发送的对数似然比 （LLR )软值相关信息包括：
所述主服务基站接收所述所有辅服务基站对所述数据帧解码后的判定 信息；
若所述所有辅服务基站对所述数据帧解码后的判定信息和所述主服务 基站对所述数据帧解码后的判定信息均是非确认信息 （NACK ), 则所述主 服务基站向所述所有辅服务基站发送要求所述所有辅服务基站反馈 LLR软 值相关信息的信令；
所述主服务基站接收所述所有辅服务基站对所述数据帧解码后求得的 对数似然比 ( LLR )软值相关信息。
3、 如权利要求 1所述的方法， 其特征在于， 所述主服务基站接收激活 集内所有辅服务基站发送的对数似然比 （LLR )软值相关信息包括：
所述主服务基站接收所述所有辅服务基站发送的 LLR软值相关信息帧， 所述 LLR软值相关信息帧包含所述所有辅服务基站对当前帧解码后求得的 对数似然比 ( LLR )软值相关信息；
所述主服务基站从所述 LLR软值相关信息帧中解出所述所有辅服务基 站对所述数据帧解码后求得的对数似然比 （LLR )软值相关信息。
4、 如权利要求 1所述的方法， 其特征在于， 所述主服务基站接收激活 集内所有辅服务基站发送的对数似然比 ( LLR )软值相关信息经过优化处理 后所得的 LLR软值相关信息包括： 所述所有辅服务基站对所述数据帧解码后求得的对数似然比（ LLR )软 值相关信息的釆样值； 或者
所述所有辅服务基站对所述数据帧解码后求得的对数似然比 ( LLR )软 值相关信息经过信源压缩后所得值； 或者
所述所有辅服务基站对所述数据帧解码后求得的对数似然比 ( LLR )软 值相关信息系统位对应的部分。
5、 如权利要求 1或 4或任意一项所述的方法， 其特征在于， 所述主服务 基站将自身对所述数据帧解码后求得的对数似然比 ( LLR )软值相关信息与 所述辅服务基站对所述数据帧解码后求得的对数似然比 ( LLR )软值相关信 息进行最大比合并具体为：
所述主服务基站将自身对所述数据帧解码后求得的对数似然比 ( LLR ) 软值相关信息与所述辅服务基站对所述数据帧解码后求得的对数似然比 ( LLR )软值相关信息按照源信息的比特位对齐相加。
6、 如权利要求 1至 3任意一项所述的方法， 其特征在于， 所述方法还包 括：
所述主服务基站将自身的信道状态信息反馈至所述用户设备。
7、 如权利要求 6所述的方法， 其特征在于， 所述信道状态信息通过增 强型绝对授权信道反馈至所述用户设备。
8、 如权利要求 7所述的方法， 其特征在于， 所述信道状态信息在最大 授权信息的空闲时刻传输。
9、 一种重传判断方法， 其特征在于， 所述方法包括：
接收激活集内所有服务基站反馈的信道状态信息；
根据所述信道状态信息和当前时刻之前发送的传输块的长度， 判断是 否重传所述传输块。
10、 如权利要求 9所述的方法， 其特征在于， 所述根据所述信道状态信 息和当前时刻之前发送的传输块的长度， 判断是否重传所述传输块包括： 根据所述信道状态信息和当前时刻之前发送的传输块的长度， 计算所 述当前时刻之前发送的传输块在接收端错误译码的概率；
所述当前时刻之前发送的传输块在接收端错误译码的概率小于设定门 限值， 则判断不需要重传所述传输块， 否则判断需要重传所述传输块。
11、 一种主服务基站， 其特征在于， 所诉主服务基站包括：
接收模块，用于接收激活集内所有辅服务基站发送的对数似然比（ LLR ) 软值相关信息或发送的 LLR软值相关信息经过优化处理后所得的 LLR软值 相关信息，其中，所述 LLR软值相关信息由激活集内辅服务基站对用户设备 发送的数据帧解码后求得；
最大比合并模块， 用于将自身对所述数据帧解码后求得的对数似然比 ( LLR )软值相关信息与所述接收模块接收的对数似然比（LLR )软值相关 信息进行最大比合并后输入译码器。
12、 如权利要求 11所述的主服务基站， 其特征在于， 所述接收模块还 包括：
第一接收单元， 用于接收所述所有辅服务基站对所述数据帧解码后的 判定信息；
信令发送单元， 用于若所述所有辅服务基站对所述数据帧解码后的判 定信息和所述主服务基站对所述数据帧解码后的判定信息均是非确认信息 ( NACK ), 则所述主服务基站向所述所有辅服务基站发送要求所述所有辅 服务基站反馈 LLR软值相关信息的信令；
第二接收单元， 用于接收所述所有辅服务基站对所述数据帧解码后求 得的对数似然比 （LLR )软值相关信息。
13、 如权利要求 11所述的主服务基站， 其特征在于， 所述最大比合并 模块还包括：
相加单元， 用于将所述主服务基站将自身对所述数据帧解码后求得的 对数似然比 ( LLR )软值相关信息与所述辅服务基站对所述数据帧解码后求 得的对数似然比（LLR )软值相关信息对数似然比（LLR )软值相关信息按 照源信息的比特位对齐相加。
14、 如权利要求 11所述的主服务基站， 其特征在于， 所述主服务基站 还包括：
信道状态信息反馈模块， 用于将所述主服务基站的信道状态信息反馈 至所述用户设备。
15、 一种用户设备， 其特征在于， 所述用户设备包括： 接收模块， 用于接收激活集内所有服务基站反馈的信道状态信息； 重传判断模块， 用于根据所述接收模块接收的信道状态信息和当前时 刻之前发送的传输块的长度， 判断是否重传所述传输块。
16、 如权利要求 15所述的用户设备， 其特征在于， 所述重传判断模块 包括：
概率计算单元， 用于根据所述信道状态信息和当前时刻之前发送的传 输块的长度， 计算所述当前时刻之前发送的传输块在接收端错误译码的概 率；
判断单元， 用于所述当前时刻之前发送的传输块在接收端错误译码的 概率小于设定门限值， 则判断不需要重传所述传输块， 否则判断需要重传 所述传输块。
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