TW201218710A - Decoding method and device in relay network - Google Patents

Abstract

In order to solve the problem that the prior relay scheme occupies many uplink communication resources and does not utilize the relay links sufficiently, the present invention provides a decoding method and device in a relay network. A relay station performs inter-packet mixture for the data in a plurality of data packets, then performs channel encoding, and transmits the encoded data to a receiver as the assistant information for the decoding of the receiver, wherein, the channel encoding includes data compression processing. The receiver obtains the estimate of the original data of each data packet respectively, and performs mixture corresponding to the relay station; the receiver also performs data decompression for the received assistant information, and performs, according to the decompressed assistant information and the mixed estimate of the original data of each data packet, joint channel decoding so as to obtain the mixed original data of each data packet, and then performs de-mixture to recover each data packet. The embodiment of the present invention occupies fewer resources and has high utilization of relay links.

Description

201218710 VI. Description of the Invention: TECHNICAL FIELD OF THE INVENTION The present invention relates to wireless relay communication, and more particularly to decoding in wireless relay communication. [Prior Art] In the current LTE-A standardization discussion, relaying is an important technology for improving capacity and improving coverage. In the uplink communication, when each user equipment (UE) directly transmits the uplink data to the base station (eNB), the relay station usually also receives the uplink data of each user equipment, and uses it as the auxiliary base station to decode the uplink data of the user equipment. The auxiliary information is forwarded to the base station. The traditional relay mode is that the relay station RN forwards the uplink data of each user equipment one by one. In FIG. 1, taking the TDD system as an example, the user equipments UE1 and UE2 respectively send their uplink data packets in the first time slot and the second time slot. 1 and P2 to the relay station RN and the base station eNB; the relay station RN forwards the received uplink data packets P1 and P2 from the user equipment UE1 and UE2 as auxiliary information to the base station eNB in the third and fourth time slots, respectively. The secondary base station eNB decodes the uplink data from the user equipment UE1 and UE2 received in the first and second time slots. As the number of user equipments served by the relay station rn increases, one by one forwarding requires more and more time slots, which causes a long communication delay. In an FDD system, such a problem is similar, requiring multiple spectrum resources. The uplink time resource or spectrum is very valuable, and the power of the relay station is also very important, so the industry urgently needs a more efficient relay mode. -5- 201218710 The applicant proposed a method of relaying in the PCT/CN2009/000446 application, as shown in FIG. 2, taking the TDD system as an example, the user equipment UE1 and UE2 are respectively in the first time slot and the second time. Does the time slot send its upstream packet? 1 and P2 are given to the relay station RN and the base station eNB; the relay station RN performs bitwise exclusive OR (or the same) on the received data packets P1 and P2 from the user equipment UE1 and UE2, and the obtained auxiliary information is in the third The time slots are forwarded to the base station eNB to assist the base station eNB in decoding the upstream data packets P1 and P2 from the user equipments UE1 and UE2 received in the first and second time slots. In this way, the relay station RN only takes up one time slot to provide auxiliary information, saving 50% of the forwarding resources. At the base station eNB side, the uplink data is recovered based on the received uplink data from the user equipments UE1 and UE2 and the auxiliary information provided by the relay station RN using the soft combining decoder. However, the performance of the above proposed method is slower when the communication performance of the relay link is improved. This means that the trunk link is not very effective. SUMMARY OF THE INVENTION It can be seen that the existing one-by-one forwarding relay mode occupies more uplink communication resources (time or spectrum). The present invention needs to provide a communication technique that occupies less resources and can fully utilize the performance of the relay link. In response to the problem, according to a first aspect of the present invention, a method for providing auxiliary information for assisting a receiver in decoding a plurality of received data packets is provided in a relay station based on the LTE-A standard, including The following steps: respectively receiving the plurality of data packages; the resources in the plurality of data packages

S -6- 201218710 Materials for aliasing between different data packets The 'aliased data includes data in each data packet; the aliased data is channel coded, wherein the channel coding step includes the aliasing The subsequent data is subjected to data compression processing; and the channel-encoded data is transmitted to the receiver as the auxiliary information. According to a second aspect of the present invention, a receiver is provided in the LTE-A based receiver. a method for decoding a plurality of data packets, wherein the receiver receives a copy of the plurality of data packets and the relay device according to the first aspect of the present invention is configured to assist the receiver to the plurality of data The auxiliary information for decoding the packet, the method comprising the steps of: decoding the received copy of each data packet; and obtaining an estimate of the original data of each data packet when the copy of the at least one data packet cannot be correctly decoded: An aliasing of the original data of each data packet corresponding to the aliasing of different data packets performed by the relay device to obtain the auxiliary information; Receiving the auxiliary information to perform data decompression corresponding to data compression performed by the relay device; performing joint channel decoding based on the decompressed auxiliary information and the aliased original data of each data packet Obtaining the original data of the aliased data packets; performing unmixing of the original data of the aliased data packets with the aliasing of different data packets of the relay device to recover Various packages. According to a third aspect of the present invention, there is provided an apparatus for providing auxiliary information for assisting a receiver in decoding a received plurality of data packets in a relay station based on an LTE-A standard, comprising: a receiving device, Receiving the plurality of data packets respectively; the aliasing device is configured to perform aliasing between the data packets of the 201218710 data in the plurality of data packets, and the aliased data includes data in each data packet; the channel encoder, Channel coding for the aliased data, wherein the channel encoder includes a data compressor for compressing the data after the aliasing; and a transmitting device for channel-encoded data The auxiliary information is sent to the receiver. According to a fourth aspect of the present invention, there is provided an apparatus for decoding a plurality of data packets in a receiver based on an LTE-A standard, wherein the receiver receives a copy of the plurality of data packets and according to the present invention The auxiliary information provided by the device of the third aspect for assisting the receiver to decode the plurality of data packets, the device comprising: a decoder for decoding the received copy of each data packet, and Obtaining an estimate of the original data of each data packet when the copy of the at least one data packet is not correctly decoded; the aliasing device is configured to perform the estimation of the original data of each data package with the third aspect according to the present invention And the device obtains the aliasing corresponding to the aliasing between the data packets by the auxiliary information; and the decompressor is configured to perform the auxiliary information received by the device according to the third aspect of the present invention. Data compression corresponding data decompression; channel decoder for estimating the auxiliary information based on the decompression and the aliased original data of each data packet, The channel decoding of the line is combined to obtain the original data of the aliased data packets; the de-mixer is configured to perform the inter-packet mixing of the original data of the aliased data packets with the relay device. Stack the corresponding unaliased to recover each packet. In the above aspect, the data compression method is used in the channel encoder to reduce the amount of information of the auxiliary information, and by adjusting the compression ratio of the data compression,

S -8 - 201218710 can save the corresponding proportion of uplink communication resources. Moreover, the receiving end can better recover the original auxiliary information through the channel decoder. At the same time, the above aspects maintain the amount of information in the auxiliary information, so that the receiving end can better decode the data packet based on the data packet received by the direct link and the auxiliary information. Since the relay station can provide the auxiliary information with better signal quality by using the relay link, the Turbo decoder can effectively combine the auxiliary information for decoding, so as the relay link is improved, the performance according to the embodiment of the present invention is improved. Great improvement. In a preferred embodiment, the above data aliasing and de-aliasing functions are implemented by an interleaver already agreed in the LTE standard. The above data compression and decompression is through the rate matcher and rate already agreed in the current LTE standard. The solver is implemented. In this embodiment, most of the modules conform to the existing LTE system definition, and only need to increase the aliasing module between the data packets. The module does not perform multiplication/addition operations, so the added complexity is small. In a preferred embodiment, at least one of the data packets is interleaved in the packet at the relay station prior to the aliasing step of the plurality of packets. At the receiver, correspondingly, after the anti-aliasing, the data of at least one of the packets is also deinterleaved. In this embodiment, the fault tolerance performance of the system is further increased. In addition, this function can also be implemented through interleavers already agreed in the LTE standard, without the need to add additional functional modules. In a preferred embodiment, when the length of the data after the aliasing is greater than the maximum length allowed by the encoder in the LTE-A standard, the data after the aliasing is divided into a plurality of data blocks each having a length not greater than the maximum length. Then, the plurality of -9 - 201218710 data blocks are encoded; after the decoder decodes the plurality of coding blocks at the receiver to obtain a plurality of data blocks, each data block is connected in series. In this embodiment, the technical problem that the length of the aliased data is larger than the maximum length allowed by the encoder is solved. [Embodiment] Hereinafter, the inventive concept of the present invention will be described in detail using an embodiment of the present invention with reference to FIG. 3 to FIG. 8. Taking a TDD system as an example, as shown in FIG. 3, user equipments UE1 and UE2 are respectively in the first The time slot and the second time slot transmit their uplink data packets P1 and P2 to the relay station RN and the base station eNB. It can be understood that the two data packets can also be sent by one user equipment. Moreover, the present invention can be applied to the case of two or more data packets (or more than two users) and to the case of two or more relays. The same applies to the FDD system. As shown in FIG. 4, after the TB (Transport Block) 1 corresponding to the packet P1 is received by the relay station RN, the receiving device calculates the symbol maximum likelihood ratio sequence LLRs1 of TB1, and then calculates the maximum likelihood ratio sequence LLRbl of the bit, and then After the channel is decoded, it is restored to the data bit; similarly, the receiving device also restores the TB2 corresponding to the data packet P2 to the data bit. In order to clearly distinguish between two data packets, the two processes are used—describe the data packets P1 and P2. It can be understood that the symbol maximum likelihood ratio calculation and the maximum likelihood ratio calculation of the data packets P1 and P2 are processed. And the channel decoder can be the same set of units. It can be understood that the channel decoder can also include a channel deinterleaver, a rate de-matcher, a sub-block deinterleaver, a code block concatenation device, and a CRC (Cyclic Redundancy -10- 201218710 Coding) detection device. This process is well known to those skilled in the art. Next, as shown in Fig. 5, a 1/3 encoding rate, a packet length of 3456 bits, and QPSK modulation are taken as an example. The 3432-bit data packets P1 and P2 are re-encoded by CRC, and the CRC check bits are added, and the length becomes 34W bits. Then, in order to increase the fault tolerance of the system, the packets P1 and P2 are respectively interleaved in the package. This function can be performed by the data interleaving module in the relay station. Interleaving is generally only about the shifting elements of the data, and it is not related to the addition or multiplication of the data, so the computational complexity is very low. It can be understood that only one packet can be inter-frame interleaved. In another embodiment, no packet is inter-frame interleaved. Next, the aliaser performs aliasing between the different packets in the packets P1 and P2, and the aliased data includes the data in the packets P1 and P2. For example, in order to increase the fault tolerance of the system, the data interleaving module in the relay station is used to interleave the data in the data packets P1 and P2 in bit-wise or multi-bitwise manners, and the interleaving is generally only about the shifting elements of the data, and not Regarding the addition or multiplication of data, the computational complexity is very low. Alternatively, without interleaving, the data in packets P1 and P2 are directly connected in series. The data length after the aliasing is 6912 bits. The aliased data is treated as a normal TB by the back-end function module, so it is then compatible with the existing back-end function modules. Thereafter, since the data length 69 12 bits is larger than the maximum length required by the Turbo encoder, the code block splitter divides the aliased data into two data blocks each having a length of 3456 bits and 3 520 bits. It can be understood that if the length of the -11 - 201218710 aliased data is less than or equal to the maximum length, the code block divider can be omitted. Then, the Turbo encoder performs Turbo coding on the divided data blocks with a coding rate of 1/3, and obtains two auxiliary code blocks having lengths of 1080 bits and 1 0572 bits, respectively. Then, the sub-block interleaver performs sub-block interleaving on the turbo coded auxiliary code block. The rate matcher then performs rate matching on the sub-block interleaved auxiliary code blocks. The coding rate is 2/3, and the compression ratio is 50%. Two auxiliary code blocks with a total length of 1 03 80 bits are obtained, which are recorded as JNC CB1 and JNC CB2. Other compression ratios may also be employed. This embodiment uses the same compression ratio as the XOR scheme to compare the performance that can be obtained when using the same forwarding resources. The auxiliary code blocks are then interleaved through the channels of the channel interleaver. Finally, the transmitting device, for example the modulator, modulates the auxiliary code block into a composite signal sequence of length 5190 symbols, and transmits it to the base station eNB in a third time slot or a fourth time slot, the composite signal sequence being denoted as P; NC. As shown in FIG. 5, after receiving the composite signal sequence of the data packets P1 and P2 through the direct link, the first time slot and the second time slot of the base station eNB respectively calculate the symbol maximum likelihood ratio sequence LLRs1, and then calculate the same. The bit maximum likelihood ratio sequence LLRb 1. Then, channel deinterleaving, rate matching, and sub-block deinterleaving are performed separately to obtain a copy of the encoded data packets P1 and P2. And, after receiving the composite signal PJNC including the auxiliary code block, the base station eNB calculates the symbol maximum likelihood. The sequence is compared to the sequence, and then the maximum likelihood ratio sequence of the bit is calculated. Then, the channel deinterleaving is performed separately, and the compressed auxiliary code block is decompressed by speed s -12-201218710 rate de-matching, and then the sub-block deinterleaving is performed, and finally two auxiliary code blocks are obtained. As shown in Figure 6, a copy of the encoded data packets P1 and P2 is provided to the Turbo decoder for decoding. When the copies of the two encoded packets are correctly decoded, the decoded data of the two packets is output. When the copy of at least one of the packets is not correctly decoded, the Turbo decoder acquires the estimates Lai and La2 of the original data of the packets P1 and P2, respectively, as prior information for decoding in the following processing. The Turbo decoder is a conventional decoder that performs multiple (e.g., 15) cycles of decoding internally. The decoding of the turbo decoder and the techniques for obtaining an estimate of the original data in the data packet are well known to those of ordinary skill in the art and will not be described again. Thereafter, the interleaver performs an interleaving of the original data of the at least one data packet corresponding to the intra-packet interleaving performed by the relay station RN to obtain the auxiliary information. When the relay station RN does not perform intra-packet interleaving, the interleaving at the base station eNB should be omitted. Then, the aliaser will perform aliasing corresponding to the aliasing of different packets carried by the relay station with the auxiliary information by the relay station. For example, the relay station RN is a bit-wise or multi-bit-by-bit packet. In the case where the data in P1 and P2 are interleaved, the data aliasing also interleaves the estimated Lai and La2 in a bit-wise or bit-by-bit manner. When the estimated length of the aliased original data of each data packet is greater than the maximum data length required by the Turbo decoder, the code block splitter divides the aliased estimate of the original data of each data packet into multiple The estimated data blocks La CB1 and La CB2 are not longer than the maximum length -13 - 201218710. It should be noted that the code block splitter performs CRC calculation on the divided binary data block by default, and adds CRC check bits after each data block; and the original data generated by the Turbo decoder The estimate is a real number that has not been hard-decided, so the code block splitter should be set to not perform CRC calculation, directly at the CRC check bit 塡0 after each estimated block. Thus, the obtained plurality of estimated data blocks La CB1 and LaCB2 correspond to the received plurality of auxiliary code blocks JNC CB1 and JNC CB2--.

The Turbo decoder performs joint channel decoding on each of the estimated data blocks La CB1 and La CB2 and the corresponding auxiliary code blocks JNC CB1 and JNC CB2 to obtain respective data blocks of the original data of the aliased data packets. . Then, the code block reassembler concatenates the data blocks of the original data of the aliased data packets into the original data of the aliased data packets. Then, the de-aliasing device performs the anti-aliasing corresponding to the inter-packet aliasing performed by the relay station RN on the original data of the aliased data packets, and separates the data belonging to different data packets. Finally, in the case where the packets P 1 and P 2 are inter-packet interleaved, the deinterleaver performs deinterleaving on the de-aliased at least one data packet corresponding to the intra-packet interleaving performed by the relay station RN to recover each data. Package information. When the relay station RN does not perform intra-packet interleaving, the de-interlacing at the base station eNB should be omitted. In the above embodiment, compared with the existing one-by-one forwarding relay technology, 50% of the forwarding resources and the corresponding transmission power are saved. and,

S -14 - 201218710 It can be seen that the interleaving in the packet and the data aliasing between the packets are added, as well as the corresponding anti-aliasing and de-interlacing, and the processing of the auxiliary information compression and decompression is added. Most of these processes can be implemented by existing functional modules with low complexity. For these increased processing front-end and back-end modules, only minor changes are required, so this embodiment has good compatibility with the current LTE-A standard. Applicants have used simulations to compare the performance of embodiments in accordance with the present invention with the performance of a relay technique proposed in the PCT/CN 2 009/00 446 application. Wherein, the relay link (RN-eNB) is better than the quality of the direct link by n dB (n=10, 12.5, 15). wherein JNC represents an s-XOR representative soft decision according to an embodiment of the present invention. XOR is the relay technology in the PCT/CN2009/000446 application, and h-XOR stands for Hard Decision XOR, which is the technology used in the existing XOR relay literature. The channel condition used for the simulation is the Rayleigh channel. The link quality of the access link (UE-RN) is 20 dB better than the direct link. The Turbo code length is 3456 bits. The modulation method is QPSK. For the Turbo decoder, the inner loop is rotated 15 times for Turbo decoding. As shown in Fig. 8, the dashed line represents a hard decision XOR, the long dash represents a soft decision XOR, and the straight line represents an embodiment according to the present invention; the triangle line is 10 dB, the circle is 12_5 dB, and the square is 15 dB. The abscissa is the bit signal to noise ratio, and the ordinate is the bit error rate. The lower the signal-to-noise ratio required to achieve a certain bit error rate (ie, the curve is close to the left), the better the communication performance. As can be seen from the figure, for hard decision XOR, since its performance is strictly dependent on the direct link and the relay link, it is limited to the direct link - 201218710 link, when the relay link The performance has not been greatly improved from l〇dB to 12.5dB and 15dB. For soft-decision XOR, it uses information from the direct link and the relay link equally; when the quality of the three links is relatively low, the combination can produce a better signal; but when only the relay When the link is improved, the reception performance is not improved much. For an embodiment in accordance with the invention, channel decoding is first performed on the signal of the direct link and then on the signal of the relay link. When the relay link is improved, although the accuracy of the estimated data La from the direct link is not high, since the relay station can provide more accurate auxiliary information, the Turbo decoder can effectively combine the auxiliary information for decoding, so the relay chain The improvement of the path, the performance according to the embodiment of the present invention is greatly improved. When the quality of the relay link is 10 dB better than the direct link, the embodiment of the present invention is superior to the soft combining technology. This can usually be guaranteed through careful network deployment. In the case where 12.5 dB can be guaranteed, in the case where the bit error rate is 10_3, the embodiment of the present invention can improve the reception performance by 2.8 dB compared with the soft-combined XOR; compared with the hard-combined XOR Embodiments of the invention can improve reception performance by 5 · 7 d B. In the case where 1 5 d B can be guaranteed, the embodiment of the present invention can improve the reception performance by 5 dB compared to the soft-combined XOR for the case where the bit error rate is 1 CT3; compared with the hard-combined XOR Embodiments of the invention can improve reception performance by 8.1 dB. The Applicant also employs simulations for performance in accordance with embodiments of the present invention and another prior art (C. Hausl and P. Durpaz, Joint

S • 16 - 201218710

Network-Channel Coding for the Multiple-Access Relay Channel, Proc. International Workshop on Wireless A d /ioc and New York, USA, June 2006 ) was compared. In the prior art, a single intra-cycle Turbo decoding is performed on the packet copy to obtain an estimated data block, and a sub-estimated data block obtained by Turbo decoding of a single inner loop based on the estimated data block and the auxiliary code block is used. Repeat (steps of 15 times) using the sub-estimated data block obtained each time and then perform a single inner loop of Turb0 decoding of the packet copy and repeat this step. The improved technique 1 is that the Turbo decoding inner loop performs 3 times of 'outer loops 5 times; the modified technique 2 is that the Turbo inner loop performs 5 times 'outer loops 3 times; the embodiment of the present invention adopts the usual Turbo decoder (internal loop) 15 times), eliminating the need for external circulation. In order to keep the computational complexity consistent, the total number of Turbo decoding times of the four methods is the same. The other simulation parameters are the same as the previous simulation. As can be seen in Figure 9, although the other prior art uses the estimated data block to decode the packet copy each time, it seems that it should have better performance, but the simulation results show that the present invention The performance of the embodiment is superior to the other prior art. In summary, the present invention employs a module that is compatible with existing LTE systems, particularly Turbo decoders, with only minor modifications to existing systems, but with better performance than the reference technology. This reference technology requires a comprehensive modification of existing systems, especially Turbo decoders. While the invention has been illustrated and described with reference to the particular embodiments -17-201218710 Other variations to the disclosed embodiments can be understood and effected by those of ordinary skill in the art. In the scope of the patent application, the word "comprising" does not exclude other elements and steps, and the word "a" does not exclude the plural. In the practical application of the invention, a part may perform the functions of a plurality of technical features cited in the scope of the patent application. Any reference signs in the scope of the patent application should not be construed as limiting the scope. BRIEF DESCRIPTION OF THE DRAWINGS The above and other features, objects, and advantages of the present invention will become more apparent from the detailed description of the accompanying drawings. Schematic diagram of the relay station RN relaying in the A standard: FIG. 2 is a schematic diagram of a new relay station RN for relaying proposed by the applicant; FIG. 3 is a schematic diagram of the relay station RN performing relay according to an embodiment of the present invention; A schematic diagram of a workflow of a front end of a relay station according to an embodiment of the present invention; FIG. 5 is a schematic diagram of an apparatus for providing auxiliary information for decoding an received plurality of data packets by an auxiliary receiver in a relay station according to an embodiment of the present invention; 6 is a workflow of a front end of a base station according to an embodiment of the present invention

FIG. 7 is a schematic diagram of an apparatus for decoding a plurality of data packets in a base station according to an embodiment of the present invention; FIG. 8 is a simulation for comparing performances according to an embodiment of the present invention and prior art; Figure 9 is a simulation diagram for comparing performance in accordance with an embodiment of the present invention and another prior art. In the drawings, identical or similar pictorial representations represent the same or similar components. [Description of main component symbols] UE1, UE2: User equipment P1: Uplink data packet P2: Downlink data packet eNB: Base station RN: Relay station -19-

Claims (1)

201218710 VII. Patent application scope: 1. A method for providing auxiliary information for assisting a receiver to decode a plurality of received data packets in a relay station based on the LTE-A standard, comprising the steps of: receiving the plurality of respectively a data packet; the data in the plurality of data packets is aliased between different data packets, and the aliased data includes data in each data packet; the aliased data is channel coded, wherein the channel code The step includes performing data compression processing on the aliased data; and transmitting the channel-encoded data as the auxiliary information to the receiver. The method of claim 1, wherein the step of merging comprises interleaving the data in the plurality of data packets between different data packages. 3. The method of claim 1, wherein before the step of aliasing, the method further comprises the step of: interleaving the data of the at least one data package. 4. The method according to claim 1, wherein the step of encoding comprises the steps of: Turbo coding the aliased data; sub-block interleaving of the turbo encoded data; and interleaving the sub-blocks The data is subjected to rate matching as the data compression processing; before the sending step, the method further includes the following steps: S -20- 201218710 Channel interleaving of the rate matched data. 5. The method of claim 1, wherein when the length of the aliased data is greater than a maximum length of data required by the channel encoding step, the method further comprises the following steps before the channel encoding step Dividing the aliased data into a plurality of data blocks each having a length not greater than a maximum length: and the channel encoding step separately channel encoding the one or more data blocks, wherein the auxiliary information is composed of one or more data blocks One or more auxiliary code blocks obtained by channel coding. 6. A method of decoding a plurality of data packets in a receiver based on the LTE-A standard, wherein the receiver receives a copy of the plurality of data packets and the relay station according to claim 1 Providing auxiliary information for assisting the receiver to decode the plurality of data packets, the method comprising the steps of: decoding a received copy of each data packet; when a copy of the at least one data package cannot be correctly decoded, Obtaining an estimate of the original data of each data packet separately; performing an aliasing on the original data of each data packet corresponding to the aliasing between different data packets obtained by the relay station to obtain the auxiliary information; The auxiliary information performs data decompression corresponding to the data compression performed by the relay station; based on the decompressed auxiliary information and the aliased original data of each data packet, joint channel decoding is performed to obtain a mixed The original data of each package after the '21 - 201218710; and the original data of the aliased package Aliasing between different data packets of the stations following the corresponding de-aliasing to recover each data packet. 7. The method of claim 6 wherein the step of aliasing comprises interleaving between different data packets, the descrambling step comprising deinterlacing corresponding to interleaving between different data packets. 8. The method according to claim 6, wherein before the step of aliasing, the method further comprises the steps of: performing an estimation of the original data of the at least one data package with a package obtained by the relay station to obtain the auxiliary information Interleaving the corresponding interleaving; after the demixing salt step, the method further includes the following steps: performing deinterlacing corresponding to the intra-packet interleaving performed by the relay station on at least one data packet of the de-mixed # to recover each data packet. The method of claim 6, wherein the channel decoding comprises Turbo decoding. The method performs the following steps before the channel decoding step: performing channel deinterleaving on the received auxiliary information; Deinterlacing auxiliary information for rate de-matching, as _ data decompression processing: and sub-block deinterleaving of rate-matched auxiliary information. 1 0. According to the method of claim 6, wherein After the aliased estimated length of the original data of each data packet is greater than the maximum data length required by the channel decoding step, the method further includes the following steps before the channel decodes the S -22-201218710 step: The subsequent estimation of the original data of each data packet is divided into an estimated data block whose length is not greater than the maximum length; the received auxiliary information is also composed of multiple auxiliary code blocks. Corresponding to the plurality of estimated data blocks; the channel decoding step respectively inputs the estimated data blocks and the corresponding auxiliary code blocks Joint channel decoding to obtain individual data blocks of the original data of the aliased data packets; the method further comprises the following steps before the de-aliasing step: the original data of the aliased data packets The individual data blocks are concatenated into the original data of the aliased data packets. 11. An apparatus for providing auxiliary information for assisting a receiver in decoding a plurality of received data packets in a relay station based on the LTE-A standard, comprising: receiving means for receiving the plurality of data packets respectively The aliasing device is configured to perform aliasing between the data packets in the plurality of data packets, the data after the aliasing includes data in each data packet, and the channel encoder for the data after the aliasing Performing channel coding, wherein the channel encoder includes a data compressor for compressing the data after the aliasing; and transmitting means for transmitting the channel-encoded data as the auxiliary information to the receiver . 12. The device according to claim 11, wherein the method further comprises: -23- 201218710 in-package interleaver 'for at least one data packet for inter-package interleaving, providing to the aliaser; the channel The encoder includes: a Turbo encoder 'for Turb 〇 encoding the aliased data t sub-block interleaver' for sub-block interleaving of Turbo encoded data: and a rate matcher for the pair of mesons The block interleaved data is rate matched as the data compressor; the device further includes a = channel interleaver for channel interleaving the rate matched data for the transmitting device. The device of claim 11, wherein when the length of the aliased data is greater than a maximum length of data required by the channel encoding step, the device further comprises: a code block dividing device, The data for the aliasing is divided into a plurality of data blocks each having a length not greater than a maximum length for being supplied to the channel encoder; and the channel encoder respectively performs channel coding on the one or more data blocks, the auxiliary Information consists of one or more auxiliary code blocks obtained by channel coding one or more data blocks. 14. An apparatus for decoding a plurality of data packets in a receiver based on the LTE-A standard, wherein the receiver receives a copy of the plurality of data packets and according to claim 11 The auxiliary information provided by the device for assisting the receiver to decode the plurality of data packets, the S-24-201218710 includes: the decoder 'for decoding a received copy of each data packet, and at least When a copy of a data package cannot be correctly decoded, an estimate of the original data of each data package is separately obtained; an aliaser is used to estimate the original data of each data package according to item 11 of the patent application scope. The device obtains the aliasing corresponding to the aliasing between the data packets by the auxiliary information; the decompressor' is configured to perform the information on the auxiliary information received according to the device according to claim 10 Compressing the corresponding data decompression; the channel decoder 'for combining the decompressed auxiliary information and the aliased original data for each data packet Channel decoding 'to obtain the original data of each packet after the mixed #; and the de-aliasing device' is used to perform the original data of the aliased data packets as described in claim 11 The device performs inter-packet aliasing corresponding to the de-aliasing to recover the data packets. I5. The device according to claim 4, wherein the method further comprises: a parent errorer for using at least one data packet The estimation of the original data is performed by interleaving corresponding to the intra-frame interleaving performed by the device according to claim 11 of the patent application scope, and is provided to the hybrid device; At least one data packet of the aliasing group is deinterleaved according to the intra-packet interleaving performed by the device described in claim 11 to recover each data packet; • 25-201218710 The channel decoder includes a Turbo decoder; The device further includes: a channel deinterleaver for performing interleaving and interleaving the received auxiliary information; and a rate dematching device for deinterleaving the channel through the channel de-interlacing As the data decompression processing: and subblock deinterleaver, rate-dematching for auxiliary information for: subblock deinterleaving, and supplied to the Turbo decoder. 16. The device of claim 1, wherein the device further comprises: when the estimated length of the aliased original data for each data packet is greater than a maximum length of data required by the channel coder, the device further comprising: a code block splitter, configured to divide the aliased estimate of the original data of each data packet into a plurality of estimated data blocks whose length is not greater than the maximum length, and provide the channel block to the channel decoder; the received auxiliary The information is also composed of a plurality of auxiliary code blocks corresponding to the plurality of estimated data blocks, wherein the channel decoder is configured to jointly combine the estimated data blocks and the corresponding auxiliary code blocks respectively. Channel decoding to obtain individual data blocks of the original data of each of the aliased data packets; the device further includes: a code block reorganizer for concatenating the data blocks of the original data of the aliased data packets The raw material of each of the aliased packets is supplied to the de-mixer. S -26-