WO2011120220A1

WO2011120220A1 - Decoding method and device in relay network

Info

Publication number: WO2011120220A1
Application number: PCT/CN2010/071445
Authority: WO
Inventors: 李纪; 胡中骥
Original assignee: 上海贝尔股份有限公司; 阿尔卡特朗讯
Priority date: 2010-03-31
Filing date: 2010-03-31
Publication date: 2011-10-06
Also published as: TW201218710A; CN102725986B; CN102725986A

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

Used for decoding in a relay network

Method and equipment

The present invention relates to wireless relay communications, and more particularly to decoding in wireless relay communications. Background technique

In the current LTE-A standardization discussion, relaying is an important technology for increasing capacity and improving coverage. In uplink communication, when each user equipment (UE) directly transmits uplink data to a base station (eNB), the relay station usually also receives uplink data of each user equipment, and uses it as a secondary base station to decode 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 transmit their uplink data packets P1 and P2 to the relay station RN and the base station eNB in the first time slot and the second time slot; the relay station RN is respectively in the third And receiving the received uplink data packets P1 and P2 from the user equipments UE1 and UE2 as auxiliary information to the base station eNB to assist the base station eNB in the first and second time slots. The uplink data received from the user equipment UE1 and UE2 is decoded. 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 problems are 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.

The applicant has 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 equipments UE1 and UE2 are respectively sent in the first time slot and the second time slot. The uplink data packets P1 and P2 are given to the relay station RN and the base station eNB; the relay station RN performs a 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 obtained. The third time slot is forwarded to the base station eNB to assist the base station eNB in decoding the upstream data packets P1 and P2 from the user equipment UE1 and UE2 received in the first and second time slots. In this way, relay The station RN only occupies one time slot to provide auxiliary information, saving 50% of 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, when the communication performance of the relay link is improved, the performance improvement of the above proposed method is relatively slow. This means that the relay link is not being used very efficiently. Summary of the invention

It can be seen that the existing one-by-one forwarding 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 this 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 in a relay station based on the LTE-A standard is provided, The method includes the following steps: receiving the plurality of data packets separately; performing aliasing between different data packets on the data in the multiple data packets, and the aliased data includes data in each data packet; performing the data after the aliasing Channel coding, wherein the channel coding step comprises performing data compression processing on the aliased data; and transmitting the channel-coded data as the auxiliary information to the receiver.

According to a second aspect of the present invention, there is provided 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 according to The auxiliary information provided by the relay device according to the first aspect of the present invention 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 at least one copy of the data packet cannot be correctly decoded, an estimation of the original data of each data packet is separately obtained; and an estimation of the original data of each data packet is performed between different data packets performed by the relay device to obtain the auxiliary information. The aliasing corresponding to the aliasing; performing data decompression corresponding to the data compression performed by the relay device on the received auxiliary information; based on the decompressed auxiliary information and the aliased data packet Estimation of the original data, performing joint channel decoding, obtaining original data of the aliased data packets; original of the aliased data packets The data is subjected to anti-aliasing corresponding to aliasing between different data packets performed by the relay device to recover each data packet. 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 the LTE-A standard, comprising: a receiving device, For respectively receiving the plurality of data packets; the aliasing device is configured to perform aliasing between the data packets in the plurality of data packets, and the aliased data includes data in each data packet; the channel encoder is used Channel-coding the aliased data, wherein the channel encoder includes a data compressor for performing data compression on the aliased data; and transmitting means for using the channel-encoded data as 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 apparatus according to the third aspect of the present invention provides auxiliary information for assisting the receiver to decode the plurality of data packets, the device comprising: a decoder, configured to decode a copy of each received data packet, And when the copy of the at least one data packet cannot be correctly decoded, respectively obtaining an estimate of the original data of each data packet; the aliaser for performing the estimation of the original data of each data packet with the third according to the present invention The device of the aspect obtains the aliasing corresponding to the aliasing between the data packets performed 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 decompressing the auxiliary information and the aliased raw data for each data packet Estimating, performing joint channel decoding to obtain original data of each of the aliased data packets; and a de-mixer for performing inter-packet processing with the relay device on the original data of the aliased data packets Aliasing the corresponding unmixing to recover each packet.

In the above aspect, the data compression is used in the channel encoder to reduce the amount of data of the auxiliary information, and by adjusting the compression ratio of the data compression, a corresponding proportion of uplink communication resources can be saved. Moreover, the receiving end can better recover the original auxiliary information through the channel decoder. At the same time, the above aspect maintains the amount of data packet 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 in combination with 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. Big Upgrade.

In a preferred embodiment, the above data aliasing and anti-aliasing functions are passed

Implemented by an interleaver already agreed in the LTE standard, the above data compression and decompression is implemented by a rate matcher and a rate dematcher already agreed in the current LTE standard. 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 complexity is small.

In a preferred embodiment, at the relay station, the data of at least one of the data packets is also inter-packet interleaved prior to the step of aliasing the plurality of data packets. At the receiver, correspondingly, after the anti-aliasing, the data of at least one of the data 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 by an interleaver already agreed in the LTE standard, without the need to add additional functional modules.

In a preferred embodiment, when the data length after the aliasing is greater than the maximum length allowed by the encoder in the LTE-A standard, the aliased data is divided into a plurality of data blocks whose length is not greater than the maximum length. Then, a plurality of 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 data length after aliasing is larger than the maximum length allowed by the encoder is solved. 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.

1 is a schematic diagram of relaying of a relay station RN in the existing LTE-A standard; FIG. 2 is a schematic diagram of a new relay station RN for relaying proposed by the applicant; FIG. 4 is a relay station of an embodiment of the present invention. Schematic diagram of the workflow of the front end;

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 schematic diagram showing a workflow of a front end of a base station according to an embodiment of the present invention; 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;

Figure 8 is a simulation diagram for comparing performances according to embodiments of the present invention and prior art;

Fig. 9 is a simulation diagram for comparing performances according to an embodiment of the present invention and another prior art.

In the figures, the same or similar reference numerals denote the same or similar components. detailed description

The inventive concept of the present invention will be described in detail below with reference to Figs. 3 through 8.

Taking the TDD system as an example, as shown in FIG. 3, the user equipments UE1 and UE2 transmit their uplink data packets P1 and P2 to the relay station RN and the base station eNB in the first time slot and the second time slot, respectively. It can be understood that the two data packets can also be sent by one user equipment. Furthermore, the present invention can be applied to the case of two or more data packets (or two or more 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 data packet P1 is received by the relay station RN, the receiving device calculates the symbol maximum likelihood ratio sequence LLRs1 of the TBI, and then calculates the bit maximum likelihood ratio sequence LLRM, and then passes through the channel. After decoding, it is restored to data bits; similarly, the receiving device also restores TB2 corresponding to packet P2 to data bits. In order to clearly distinguish between two data packets, a two-way process is used—depicting the data packets P1 and P2. It can be understood that the symbol maximum likelihood ratio calculation, the bit maximum likelihood ratio calculation, and the bit maximum likelihood ratio calculation of the data packets P1 and P2 are processed. The channel decoders can be the same set of units. It will be appreciated that the channel decoder may also include a channel deinterleaver, a rate dematcher, a subblock deinterleaver, a code block concatenation device, and a CRC (Cyclic Redundancy 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 respectively re-encoded by the CRC, and the CRC check bit is added, and the length becomes 3456 bits. Then, in order to increase the fault tolerance of the system, the data packets P1 and P2 are respectively interleaved in the packet. This function can be performed by the data interleaving module in the relay station. Interleaving generally involves only the shifting of data, and does not involve adding or multiplying the data, so the computational complexity is low. It can be understood that only one data packet can be inter-frame interleaved. In another embodiment, no intra-packet interleaving is performed on any one of the packets.

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 on a bit-by-bit or bit-by-bit basis. Interleaving generally involves only data shifting, and does not involve data. Addition or multiplication, so the computational complexity is very low. Alternatively, without interleaving, the data in packets P1 and P2 are directly concatenated in series. The data length after aliasing is 6912 bits. The aliased data is treated by the backend function module as a normal TB, so it is then compatible with existing backend functional modules.

Thereafter, since the data length 6912 bits is larger than the maximum length required by the turbo encoder, the code block divider divides the aliased data into two data blocks of lengths of 3456 and 3520 bits, respectively. It can be understood that the code block divider can be omitted if the length of the aliased data is less than or equal to the maximum length.

Then, the Turbo encoder performs Turbo coding with a coding rate of 1/3 for the two divided data blocks, and obtains two auxiliary code blocks having lengths of 10380 bits and 10572 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 10380 bits are obtained, which are denoted as J C CB 1 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 available when using the same forwarding resources.

Then, the auxiliary code block is further interleaved by the channel interleaver.

Finally, the transmitting device, for example, the modulator modulates the auxiliary code block into a complex signal sequence having a length of 5190 symbols, and transmits the signal to the base station eNB in the third time slot or the fourth time slot, the complex signal The sequence is denoted as P_j _NC .

As shown in FIG. 5, after receiving the complex 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 bit thereof. Maximum likelihood ratio sequence LLRbl. Thereafter, 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 complex signal Pj _NC including the auxiliary code block, the base station eNB calculates its symbol maximum likelihood ratio sequence and then calculates its bit maximum likelihood ratio sequence. Then, channel deinterleaving is performed separately, and the compressed auxiliary code block is decompressed by rate de-matching, and then 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 a priori 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.

Next, the aliaser will perform aliasing for each of the estimated Las corresponding to the aliasing between different packets made by the relay station to obtain the auxiliary information. For example, in the case where the relay station RN interleaves the data in the packets P1 and P2 bit by bit or bit by bit, the data aliasing also interleaves the estimated Lai and La2 in a bitwise or bit by bit manner.

When the estimated length of the aliased original data for 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 each not longer than the maximum length. It should be noted that the code block splitter performs CRC calculation on the divided binary data block by default, and adds a CRC check bit after each data block; Since the estimate of the original data generated by the Turbo decoder is a real value that has not been hard-decided, the code block splitter should be set to not perform the CRC calculation, and the CRC check bit after each estimated data block is directly filled in. 0.

Thus, the obtained plurality of estimated data blocks La CB l 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 CB 1 and JNC CB2 to obtain respective data of the original data of each of the aliased data packets. Piece.

Then, the code block reassembler concatenates the individual data blocks of the original data of the aliased data packets into the original data of the aliased data packets.

Next, the de-aliasing performs the unaliasing of the original data of the aliased data packets corresponding to the inter-packet aliasing performed by the relay station RN, and separates the data belonging to the different data packets.

Finally, in the case that the data packets P1 and P2 are inter-packet interleaved, the deinterleaver performs deinterleaving on the at least one data packet that is de-aliased corresponding to the intra-packet interleaving performed by the relay station RN to recover each data packet. data. 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 embodiments, 50% of the forwarding resources and the corresponding transmission power are saved compared to the existing one-by-one forwarding relay technology. Moreover, it can be seen that the interleaving in the packet and the data aliasing processing between the data packets, and the corresponding anti-aliasing and deinterleaving processing are added, 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 implementation has good compatibility with current LTE-A standards.

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/CN2009/000446 application. Among them, 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 embodiment according to the present invention, s-XOR represents soft XOR 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 is 3456 bits long. The modulation method is QPSK. For the Turbo decoder, Turbo decoding is performed 15 times in the inner loop.

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 by the direct link, when the relay link is improved from 10 dB to 12.5. Performance is not greatly improved at dB 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 low, the merge can produce a better signal; but when there is only a relay chain When the road is improved, the reception performance is not improved much.

For embodiments in accordance with the present 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 relatively accurate auxiliary information, the turbo decoder can effectively combine the auxiliary information for decoding, so with the relay chain The improvement of the road has greatly improved the performance according to the embodiment of the present invention.

Embodiments of the present invention are superior to soft combining techniques when the quality of the relay link is 10 dB better than the direct link. This can usually be guaranteed through careful network deployment. In the case where 12.5 dB can be guaranteed, the embodiment of the present invention can improve reception performance by 2.8 dB compared to soft combining XOR for a bit error rate of 10 - ³ ; compared with hard-combined XOR, the present invention The implementation can improve the reception performance by 5.7 dB. In the case where 15 dB can be guaranteed, the embodiment of the present invention can improve the reception performance by 5 dB compared to the soft combining XOR for the case where the bit error rate is 10 - ³ ; compared with the hard combining XOR, the embodiment of the present invention Can improve the receiving performance by 8.1dB.

Applicants also employ simulation means for performance and other embodiments in accordance with the present invention. A prior art (C. Hausl and P. Durpaz, Joint Network-Channel Coding for the Multiple-Access Relay Channel, Proc. International Workshop on Wireless Ad Hoc and Sensor Networks, New York, USA, June 2006) was compared. . In this prior art, a single intra-cycle Turbo decoding is performed on the data packet replica to obtain an estimated data block, and a secondary 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. Looping multiple times (for example, 15 times) Turbo decoding of a single inner loop of the packet copy is performed using the sub-estimated data block obtained each time and the step is repeated. The improved technique 1 is that the Turbo decoding inner loop is performed 3 times and the outer loop is performed 5 times; the improved technique 2 is that the Turbo inner loop is performed 5 times and the outer loop is performed 3 times; the embodiment of the present invention uses the usual Turbo decoder (inside) The cycle is performed 15 times), eliminating the need for an outer loop. In order to maintain consistency in computational complexity, the total number of Turbo decodings for these four methods is the same. The other simulation parameters are the same as the previous simulation. As shown in Figure 9, it can be seen that 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 this The performance of an embodiment of the invention is superior to the other prior art. In summary, the present invention uses a module compatible with the existing LTE system, particularly the Turbo decoder, to make a small change to the existing system, but to obtain 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

Other variations to the disclosed embodiments can be understood and effected by those skilled in the <RTIgt; In the claims, the <RTIgt; "comprising"</RTI> 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 the plurality of technical features recited in the claims. Any reference signs in the claims should not be construed as limiting the scope.

Claims

Claim

A method 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 the steps of:

- receiving the plurality of data packets respectively;

- the data in the plurality of data packets is aliased between different data packets, and the aliased data includes data in each data packet;

- channel coding the aliased data, wherein the channel encoding step comprises performing data compression processing on the aliased data; and

- transmitting the channel encoded data as the auxiliary information to the receiver.

2. The method of claim 1 wherein the step of aliasing comprises interleaving data between the plurality of data packets between different data packets.

3. The method according to claim 1, wherein before the aliasing step, the method further comprises the steps of:

- Interleaving the data in at least one packet.

4. The method according to claim 1, wherein the channel coding step comprises the following steps:

- Turbo coding the aliased data;

- sub-block interleaving of Turbo encoded data; and

- performing rate matching on the data interleaved by the sub-block as the data compression processing; the method further comprises the following steps before the sending step:

- Channel interleaving of rate matched data.

The method according to claim 1, wherein when the length of the aliased data is greater than a maximum length of data required by the channel coding step, the method further comprises the following steps before the channel coding step: '

- dividing the aliased data into a plurality of data blocks each having a length not greater than a maximum length;

The channel coding step separately performs channel coding on the one or more data blocks, the auxiliary

Correction page (Article 91) The help information consists of one or more auxiliary code blocks that are channel coded by one or more data blocks.

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 Auxiliary information for assisting the receiver in decoding the plurality of data packets, the method comprising the steps of:

- decoding a copy of each received packet;

- obtaining an estimate of the raw data for each data packet when a copy of at least one of the data packets cannot be correctly decoded;

- an aliasing of the original data of each data packet corresponding to the aliasing between different data packets carried out by the relay station to obtain the auxiliary information;

- performing data decompression corresponding to the data compression performed by the relay station on the received auxiliary information;

- performing joint channel decoding based on the decompressed auxiliary information and the aliased original data of each data packet to obtain original data of the aliased data packets;

- Unmixing the original data of each of the aliased data packets with the aliasing of different data packets performed by the relay station to recover each data packet. ,

7. The method of claim 6, wherein the aliasing step comprises interleaving between different data packets, the descrambling step comprising deinterleaving corresponding to interleaving between different data packets.

8. The method according to claim 6, wherein before the aliasing step, the method further comprises the following steps:

- interleaving an estimate of the original data of the at least one data packet with an intra-packet interleaving performed by the relay station to obtain the auxiliary information;

After the anti-aliasing step, the method further includes the following steps:

- Deinterleaving at least one of the de-aliased data packets corresponding to the intra-packet error of the relay station to recover each data packet.

9. The method of claim 6, wherein the channel decoding comprises a correction page (Article 91) Turbo decoding, the method performs the following steps before the channel decoding step:

- performing channel deinterleaving on the received auxiliary information;

- rate-matching the auxiliary information deinterleaved by the channel as the data decompression process; and

- Sub-block deinterleaving of rate-matched auxiliary information.

10. The method according to claim 6, wherein when the estimated length of the aliased original data for each data packet is greater than a maximum data length required by the channel decoding step, the method decodes the channel The steps also include the following steps:

- dividing the aliased estimate of the original data of each data packet into a plurality of estimated data blocks each having a length not greater than the maximum length;

The received auxiliary information is also composed of a plurality of auxiliary code blocks, and the plurality of auxiliary code blocks correspond to the plurality of estimated data blocks;

The channel decoding step performs joint channel decoding on each of the estimated data blocks and the one-to-one corresponding auxiliary code block to obtain respective data blocks of the original data of the aliased data packets;

The method further includes the following steps before the anti-aliasing step:

- Concatenating the individual data blocks of the original data of the aliased data packets 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:

a receiving device, configured to respectively receive the plurality of data packets;

- an aliaser for aliasing data between the plurality of data packets, the aliased data including data in each data packet;

a channel coder for channel coding the aliased data, wherein the channel coder comprises a data compressor for data compression of the aliased data;

a transmitting device for transmitting channel-encoded data as the auxiliary information to the receiver.

12. The device according to claim 11, further comprising: a correction page (Article 91) - an inter-package interleaver for interleaving the data of at least one data packet to the intermixer;

The channel encoder includes:

a Turbo encoder for performing Turbo coding on the aliased data;

a sub-block interleaver for sub-block interleaving the turbo encoded data; and a rate matcher for rate matching the sub-block interleaved data as the data compressor;

The device also includes:

a channel interleaver for channel interleaving the rate matched data for the transmitting device.

The device according to claim 11, wherein when the length of the aliased data is greater than a maximum length of data required by the channel coding step, the device further includes:

a code block dividing device, configured to divide the data after the aliasing into a plurality of data blocks each having a length not greater than a maximum length, and providing the data to the channel encoder;

The channel encoder separately channel codes the one or more data blocks, the auxiliary information consisting 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 the apparatus according to claim 11 Auxiliary information for assisting the receiver in decoding the plurality of data packets, the device comprising:

a decoder for decoding a 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;

An aliasing unit for performing an aliasing of the estimation of the original data of each data packet corresponding to the aliasing between the data packets obtained by the device according to claim 11 for obtaining the auxiliary information;

- a decompressor for correcting the received auxiliary information with the correction page according to claim 11 (Article 91) Decompressing data corresponding to data compression performed by the device;

a channel decoder, configured to perform joint channel decoding based on the decompressed auxiliary information and the aliased original data of each data packet to obtain original data of the aliased data packets;

A de-aliasing device for performing unaliasing of the original data of the aliased data packets corresponding to the inter-packet aliasing performed by the apparatus according to claim 11 to recover the data packets.

The device according to claim 14, further comprising:

An interleaver for providing an estimate of the original data of the at least one data packet to the interlace corresponding to the intra-packet interleaving performed by the device according to claim 11 for obtaining the auxiliary information;

Deinterleaver for deinterleaving at least one of the de-aliased data packets corresponding to intra-packet interleaving performed by the apparatus according to claim 11 to recover each data packet; said channel decoder comprising Turbo decoder;

The device also includes:

a channel deinterleaver for performing channel deinterleaving on the received auxiliary information; - a rate dematcher for performing rate solution matching on the channel deinterleaved auxiliary information as the data decompression process; and

a sub-block deinterleaver for sub-block de-interleaving the rate-delayed auxiliary information and providing it to the turbo decoder.

The device according to claim 14, wherein 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 decoder, the device further comprises:

a code block divider, configured to divide the aliased estimate of the original data of each data packet into a plurality of estimated data blocks each having a length not greater than the maximum length, and providing the estimated data block to the channel decoder;

The received auxiliary information is also composed of a plurality of auxiliary code blocks, and the plurality of auxiliary code blocks correspond to the plurality of estimated estimated data blocks;

The channel decoder is used for each of the estimated data blocks and the corresponding auxiliary correction page (Article 91) The code block performs joint channel decoding to obtain each data block of the original data of each of the aliased data packets;

The device also includes:

- a code block reorganizer for concatenating the individual data blocks of the original data of the aliased data packets into the original data of the aliased data packets, and providing the same to the de-mixer.

16

Correction page (Article 91)