CN104125048B - Hybrid automatic repeat-request merges interpretation method and device - Google Patents

Abstract

The invention discloses a HARQ (automatic repeat request) combined decoding method and device, which demodulates packets in batches (Batch) 1, Batch 2 and Batch 3, and uses the solution of the offset packets in Batch 1 and Batch 2 Decoding the result of modulation improves the capacity and accuracy of traffic channel decoding; when the Batch does not allocate resources and the packet is lost due to an abnormality, the robustness of the HARQ combined decoding device can be guaranteed and the hardware implementation cost is low.

Description

Hybrid automatic repeat request combined decoding method and device

technical field

The present invention relates to mobile communication technology, in particular to a combined decoding method and device for automatic repeat request (HARQ, Hybrid AutomaticRepeat Request).

Background technique

Currently, the Universal Mobile Telecommunications System (UMTS, Universal Mobile Telecommunications System) generally uses the High Speed Uplink Packet Access (HSUPA, High Speed Uplink Packet Access) technology that integrates the Hybrid Automatic Repeat Request (HARQ) to improve the The uplink data service side bearer capacity. The HSUPA specification adopts the HARQ (Hybrid Automatic Repeat Request) technology. The base station (Node B) side device will receive an antenna of a Transmission Time Interval (TTI, Transmission Time Interval). After the data packet (hereinafter referred to as the packet) is demodulated and decoded, the retransmission sequence number (RSN, Retransmission Sequence Number) of the first transmitted packet is 0, if the decoding result Cyclic Redundancy Check (CRC, Cyclic Redundancy Check) If it is correct (OK), it will return an ACK message. If the CRC is incorrect (Error), it will return a NACK message to request the user terminal (UE, User Equipment) to retransmit the packet, and perform HARQ on the packet (RSN is 1) retransmitted by the UE with the previous packet. Combining, that is, combining the result of demodulation of the retransmitted packet (including the processing of de-rate matching) and the result of demodulation of the buffered packet (RSN is 0) (also including the processing of de-rate matching), and using the combined result to decode If the decoding result is CRC Error, the UE is required to retransmit the packet until the decoding result is CRC OK or the packet reaches the maximum number of retransmissions.

When the above technologies are actually applied, how to make full use of the resources of the equipment on the base station side to improve the decoding capacity and accuracy of the service channel has become a technical hotspot; and how to avoid the scenario of HARQ merging and the scenario of packet loss caused by hardware exceptions are coupled. The equipment on the base station side brings interference, which has become an urgent problem to be solved.

SUMMARY OF THE INVENTION

In view of this, the main purpose of the present invention is to provide a HARQ combined decoding method and device, which can improve the decoding capacity and the correct rate, and solve the problem of interference caused when the packet combining scene and the hardware abnormality cause packet loss scene coupling, reducing decoding. gain problem.

In order to achieve the above object, the technical scheme of the present invention is achieved in this way:

The present invention provides a HARQ combined decoding method, and the method includes:

In the batch (Batch) 1, perform the first demodulation and decoding on the packet whose RSN is 0 sent by the user terminal UE for the first time, reconstruct the packet whose CRC of the decoding result is correct, and cancel the received packet by the reconstructed packet. group;

Perform the second demodulation and decoding on the canceled packet in Batch 2, reconstruct the correct CRC packet of the decoding result, and cancel the original packet demodulated and decoded in Batch 2 to the reconstructed packet in Batch 2. grouping, and make the UE corresponding to the packet with the CRC error in the decoding result retransmit the packet;

In Batch 3, re-demodulate the packet after Batch 2 cancellation;

In Batch 1, demodulate the retransmission packet whose RSN is 1 for the first time, combine the demodulation result with the demodulation result of Batch 3, and use the combined result for decoding, and reconstruct the decoding result with correct CRC. grouping, the original retransmission grouping with the demodulated RSN of 1 in Batch 1 cancels the reconstructed grouping;

In Batch 2, perform the second demodulation on the retransmission packet whose RSN is 1 after the offset of Batch 1, combine the demodulation result with the demodulation result of the packet whose RSN is 1 after the offset of Batch 1, and use the combined result to decode code, reconstruct the packet with the correct CRC of the decoding result, offset the retransmitted packet with the RSN of 1 demodulated in Batch 2 to cancel the reconstructed packet, and retransmit the UE corresponding to the packet with the incorrect CRC of the decoding result group;

In Batch 3, re-demodulate the packet whose RSN is 1 after the offset of Batch 2; until the CRC of the decoding result of all the packets is correct or the number of packet retransmissions reaches the preset maximum value, the current processing ends.

Preferably, the method further includes:

When it is determined that there is a Batch with unallocated resources before the current Batch, and it is determined that the demodulated packet in the current Batch is a new packet and the current Batch is not Batch 3, decoding is performed using the demodulation result of the packet in the current Batch.

Preferably, the determining that the demodulated grouping in the current Batch is a new grouping includes: determining any one of the following groups in the current Batch is a new grouping:

The retransmission packet of the packet whose number of retransmissions reaches the preset maximum value;

Groups whose RSN is 0;

The retransmission packet of the packet with the correct CRC of the decoding result;

For a retransmitted packet that is demodulated for the first time, the RSN of the packet is not 3 and is not greater than the RSN of the packet corresponding to the packet at the last transmission.

Preferably, the method further includes:

Determine that there is a batch with unallocated resources before the current batch, and determine that the demodulated packet in the current batch is not a new packet and the current batch is not batch 3, compare the demodulation result of the packet in the current batch with the batch that allocated resources before the current batch. The demodulation results of the packets are combined and decoded using the combined results.

Preferably, the method further includes:

Store the result of the first demodulation of the packet whose RSN is 0 in Batch 1 in the physical buffer memory (Buffer) A, store the result of the second demodulation of the packet whose RSN is 0 in Batch 2 into the physical Buffer B, The result of the packet re-demodulation with RSN of 0 in Batch 3 is stored in physical Buffer A, the mapping from Buffer 2 to physical Buffer B and the mapping from Buffer 1 to physical Buffer A are established, and the demodulation result in Buffer 2 is used for decoding ;

Store the result of the first demodulation of the packets whose RSN is not 0 in Batch 1 to physical Buffer B, establish the mapping from Buffer 2 to physical Buffer B, and the mapping from Buffer 1 to physical Buffer A, and use the demodulation result in Buffer 2 for translation code;

Store the results of the second demodulation of the packets whose RSN is not 0 in Batch 2 to physical Buffer A, establish the mapping from Buffer 2 to physical Buffer A, and the mapping from Buffer 1 to physical Buffer B, and use the demodulation results in Buffer 2 to perform decoding;

Store the result of re-demodulation of packets with a non-zero RSN in Batch 3 into physical Buffer B, and establish the mapping from Buffer 2 to physical Buffer B and the mapping from Buffer 1 to physical Buffer A.

The present invention also provides a HARQ combining and decoding device, the device includes: a first combining and decoding unit, a second combining and decoding unit, and a third combining unit; wherein,

The first combining and decoding unit is used to demodulate and decode the packet whose RSN is 0 sent by the UE for the first time in Batch 1, reconstruct the correct CRC packet of the decoding result, and cancel the received packet. The reconstructed grouping; in Batch 1, the retransmission grouping with RSN of 1 is demodulated for the first time, the demodulation result is combined with the demodulation result in Batch 3, and the combined result is used for decoding, Reconstruct the correct grouping of the decoding result CRC, and offset the original retransmission grouping with the RSN of 1 for demodulation in Batch 1 against the reconstructed grouping;

The second merging and decoding unit is used for performing the second demodulation and decoding on the offset grouping in Batch 2, reconstructing the correct grouping of the CRC of the decoding result, and performing demodulation and decoding in Batch 2 The original packet of the code cancels the reconstructed packet in Batch 2, and causes the UE to retransmit the packet corresponding to the packet with the CRC error in the decoding result; in Batch 2, the retransmission packet whose RSN is 1 after the offset of Batch 1 is retransmitted for the second time. Demodulate, combine the demodulation result with the demodulation result of the packet whose RSN is 1 after the offset of Batch 1, use the combined result to decode, reconstruct the packet with the correct CRC of the decoding result, and combine the demodulated RSN in Batch 2 The retransmission packet of 1 cancels the reconstructed packet, and makes the UE retransmit the packet corresponding to the packet with the CRC error in the decoding result;

The third merging unit is used to re-demodulate the packet after the offset of Batch 2 in Batch 3; in Batch 3, re-demodulate the packet whose RSN is 1 after the offset of Batch 2; If the CRC of the decoding results of all the packets of the code unit and the second combined decoding unit is correct or the number of packet retransmissions reaches a preset maximum value, the current processing ends.

Preferably, the first combined decoding unit and the second combined decoding unit are further used to determine that there is a Batch with unallocated resources before the current Batch, and to determine that the demodulated packet in the current Batch is a new packet and the current Batch is not Batch3 When , use the demodulation result of the packet in the current Batch for decoding.

Preferably, the first combined decoding unit and the second combined decoding unit are also used to determine any one of the following groups in the current Batch as a new group:

The retransmission packet of the packet whose number of retransmissions reaches the preset maximum value;

Groups whose RSN is 0;

The retransmission packet of the packet with the correct CRC of the decoding result;

For a retransmitted packet that is demodulated for the first time, the RSN of the packet is not 3 and is not greater than the RSN of the packet corresponding to the packet at the last transmission.

Preferably, the first combined decoding unit and the second combined decoding unit are also used to determine that there is a Batch with unallocated resources before the current Batch, and to determine that the demodulated packet in the current Batch is not a new packet and the current Batch is not a Batch At 3, the demodulation result of the packet in the current Batch is combined with the demodulation result of the packet in the batch to which the resource is allocated before the current Batch, and the combined result is used for decoding.

Preferably, the first combining and decoding unit is further configured to store the result of the first demodulation of the packet whose RSN is 0 in Batch 1 in Buffer A, and use the demodulation result in Buffer 2 for decoding; In Batch 1, the result of the first demodulation of the packet with a non-zero RSN is stored in physical Buffer B, and the demodulation result in Buffer 2 is used for decoding;

The second merging and decoding unit is also used to store the result of the second demodulation of the packet whose RSN is 0 in Batch 2 into physical Buffer B, and utilize the demodulation result in Buffer 2 for decoding; The result of the second demodulation of the packet whose RSN is not 0 is stored in physical Buffer A, and the demodulation result in Buffer 2 is used for decoding;

The third merging unit is also used to store the result of the packet re-demodulation with RSN 0 in Batch 3 to physical Buffer A;

The apparatus further includes: a mapping unit, configured to store, in the first decoding and combining unit, a result of the first demodulation of the packet whose RSN is 0 in Batch 1 to the physical buffer memory Buffer A, and the second combining unit. The decoding unit stores the result of the second demodulation of the packet whose RSN is 0 in Batch 2 into physical Buffer B, and the third merging unit stores the result of re-demodulation of the packet whose RSN is 0 in Batch 3 into the physical Buffer At the time of A, the mapping from Buffer 2 to physical Buffer B and the mapping from Buffer 1 to physical Buffer A are established; the first combining and decoding unit stores the result of the first demodulation of the packet whose RSN is not 0 in Batch 1 to the physical Buffer When B, the mapping from Buffer 2 to physical Buffer B and the mapping from Buffer 1 to physical Buffer A are established; the second combining and decoding unit stores the result of the second demodulation of the packets whose RSN is not 0 in Batch 2 into the physical When Buffer A is used, the mapping from Buffer 2 to physical Buffer A and the mapping from Buffer 1 to physical Buffer B are established; the third merging unit stores the result of re-demodulation of packets whose RSN is not 0 in Batch 3 to physical Buffer B , establish the mapping from Buffer 2 to physical Buffer B, and the mapping from Buffer 1 to physical Buffer A.

In the above scheme, the packets are demodulated in Batch 1, Batch 2 and Batch 3, and the demodulation results of the offset packets are used for decoding in Batch 1 and Batch 2, which improves the capacity and accuracy of traffic channel decoding. ; When the Batch does not allocate resources and the packet is lost due to an exception, determine whether there is a Batch with unallocated resources before the current Batch, and determine whether the demodulated packet in the current Batch is a new packet, and whether the current Batch is Batch 3, according to the determination Decoding or combined decoding can ensure the robustness of the HARQ combined decoding device and the low hardware implementation cost; further, according to different combined decoding scenarios, Buffer 2 is established to store the physical Buffer of the demodulation result. Therefore, when decoding, the demodulation result in the physical Buffer mapped by Buffer 2 is always used for decoding, which is convenient for decoding.

Description of drawings

1a is a schematic diagram of a demodulation scene in an embodiment of the present invention;

FIG. 1b is a schematic flowchart of an implementation of a HARQ combined decoding method according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of the composition and structure of a HARQ combined decoding apparatus according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of mapping of physical buffers in an embodiment of the present invention;

Fig. 4a is a schematic diagram of an implementation flow of performing merging of demodulation results according to a maintained identifier and decoding using the demodulation results in an embodiment of the present invention;

4b is a schematic flowchart of an implementation of combining and decoding using group identifiers according to an embodiment of the present invention;

5a-5g are schematic diagrams of various abnormal scenarios in an embodiment of the present invention.

Detailed ways

The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

In the following, the transmission time interval of 2 milliseconds (ms, millisecond) is carried by the enhanced dedicated physical data channel/enhanced dedicated physical control channel (E-DPDCH, Enhanced-Dedicated Physical Data CHannel)/(E-DPCCH, Enhanced-Dedicated Physi calControl Channel) (TTI, Transmission TimeInterval) user terminal (UE, User Equipment) scenario is taken as an example to illustrate the HARQ combined decoding method of the present invention. FIG. 1a is a schematic diagram of a demodulation scenario in an embodiment of the present invention. It should be noted that, In the demodulation scenario of the embodiment of the present invention shown in FIG. 1a, the first demodulation and the second demodulation are performed on the packet whose RSN is 0 for the first transmission. When the retransmission packet of the packet is received after the slot), first re-demodulate the previous packet whose RSN is 0, and decode according to the re-demodulation result and the demodulation result of the packet whose RSN is 1. For practical applications In the case where the resources on the base station side allow, and in the scenario where demodulation is performed no less than three times before re-demodulation, the technical solution of the present invention is also applicable. FIG. , as shown in Figure 1b, the method includes:

Step 10: Perform the first demodulation and decoding on the packet whose retransmission sequence number (RSN, Retransmission Sequence Number) is 0 sent by the UE for the first time in Batch 1, and reconstruct the correct CRC packet of the decoding result, offsetting the received packet against the reconstructed packet;

The grouping is a grouping of antenna data transmitted by the UE at 2ms TTI, corresponding to one subframe (Subframe), and each subframe includes 3 time slots (Slot).

Step 20: Perform the second demodulation and decoding on the canceled packet in Batch 2, reconstruct the correct CRC packet of the decoding result, and cancel the original packet that was demodulated and decoded in Batch 2. The reconstructed packet is sent, and the UE corresponding to the CRC error packet of the decoding result is sent to retransmit the packet;

Step 30: In Batch 3, re-demodulate the packet after the offset of Batch 2;

Step 40: Perform the first demodulation on the retransmission packet whose RSN is 1 in Batch 1, combine the demodulation result with the demodulation result in Batch 3, and use the combined result for decoding to reconstruct the decoding result The CRC is correct grouping, and the original retransmission grouping with the RSN of 1 for demodulation in Batch 1 is used to offset the reconstructed grouping;

Step 50: Perform a second demodulation on the retransmission packet whose RSN is 1 after the offset of Batch 1 in Batch 2, combine the demodulation result with the demodulation result of the packet whose RSN is 1 after the offset of Batch 1, and use the combination The result is decoded, the packet with the correct CRC of the decoding result is reconstructed, the retransmission packet with the RSN of 1 demodulated in Batch 2 is cancelled out the reconstructed packet, and the packet corresponding to the wrong CRC of the decoding result is sent. UE retransmits the packet;

Step 60: In Batch 3, re-demodulate the packet whose RSN is 1 after the offset of Batch 2; until the CRC of the decoding result of all the packets is correct or the packet reaches the preset maximum number of retransmissions, the current processing is ended.

Preferably, there is a Batch with unallocated resources before the current Batch, and when it is determined that the demodulated packet in the current Batch is a new packet and the current Batch is not Batch 3, decoding is performed using the demodulation result of the packet in the current Batch.

Preferably, the determining that the demodulated grouping in the current Batch is a new grouping includes: determining any one of the following groups in the current Batch is a new grouping:

The retransmission packet of the packet whose number of retransmissions reaches the preset maximum value;

Groups whose RSN is 0;

The retransmission packet of the packet with the correct CRC of the decoding result;

For a retransmitted packet that is demodulated for the first time, the RSN of the packet is not 3 and is not greater than the RSN of the packet corresponding to the packet at the last transmission.

Among them, the retransmission packet of the packet whose number of retransmission times reaches the preset maximum value is used as a new packet for demodulation and decoding; when there is a retransmission packet of a packet with a correct decoding result CRC, it means that an abnormality occurs at this time and causes retransmission. If the CRC of the decoding result is correct, the retransmitted packet is regarded as a new packet, and demodulated and decoded; the first demodulated retransmission packet, the RSN of the packet is not 3 and does not exceed the The RSN of the packet corresponding to the packet in the last transmission indicates that an abnormality occurred at this time. For example, the RSN of the first demodulated packet is 2, and the RSN of the packet corresponding to the packet in the last transmission is 2. Since there is no abnormality The RSN of the packet should be 3, so an exception occurs at this time. Because the existing protocol defines the RSN of 3 to be retransmitted, the RSN is still 3 (only 2 bits are allocated for the RSN identifier), so the RSN of the packet corresponds to the packet. It is not abnormal that the RSN of the last transmission of the packet is 3.

Preferably, the method further includes:

Determine that there is a Batch with unallocated resources before the current Batch, and determine that the demodulated packet in the current Batch is not a new packet and the current Batch is not Batch 3, compare the demodulation result of the packet in the current Batch with the previous allocated resource of the current Batch. The demodulation results of the packets in the batch are combined, and the combined results are used for decoding.

Preferably, the method further includes:

Store the result of the first demodulation of the packet whose RSN is 0 in Batch 1 in the physical buffer memory (Buffer) A, store the result of the second demodulation of the packet whose RSN is 0 in Batch 2 into the physical Buffer B, In Batch 3, the result of the re-demodulation of the packet whose RSN is 0 is stored in physical Buffer A, the mapping from Buffer 2 to physical Buffer B and the mapping from Buffer 1 to physical Buffer A are established, and the demodulation result in Buffer 2 is used for decoding;

Store the first demodulation result of the packets whose RSN is not 0 in Batch 1 to physical Buffer B, establish the mapping from Buffer 2 to physical Buffer B, and the mapping from Buffer 1 to physical Buffer A, and use the demodulation result in Buffer 2 to perform decoding;

Store the result of the second demodulation of the packets whose RSN is not 0 in Batch 2 to physical Buffer A, establish the mapping from Buffer 2 to physical Buffer A, and the mapping from Buffer 1 to physical Buffer B, and use the demodulation result of Buffer 2 for interpretation code;

Store the re-demodulation result of the packets whose RSN is not 0 in Batch 3 into physical Buffer B, and establish the mapping from Buffer 2 to physical Buffer B and the mapping from Buffer 1 to physical Buffer A.

An embodiment of the present invention further provides a HARQ combined decoding apparatus, which is used for:

In Batch 1, perform the first demodulation and decoding on the packet whose RSN is 0 sent by the UE for the first time, reconstruct the packet whose CRC of the decoding result is correct, and cancel the received packet to the reconstructed packet; in Batch 2 Carry out the second demodulation and decoding to the group after the cancellation, reconstruct the correct grouping of the CRC of the decoding result, cancel the original grouping that is demodulated and decoded in Batch 2 to the reconstructed grouping in Batch 2, and make Send the UE retransmission packet corresponding to the CRC error packet of the decoding result;

In Batch 3, re-demodulate the packet after Batch 2 cancellation;

In Batch 1, demodulate the retransmission packet whose RSN is 1 for the first time, combine the demodulation result with the demodulation result of Batch 3, and use the combined result for decoding, and reconstruct the decoding result with correct CRC. grouping, the original retransmission grouping with the demodulated RSN of 1 in Batch 1 cancels the reconstructed grouping;

In Batch 2, perform the second demodulation on the retransmission packet whose RSN is 1 after offset in Batch 1, and combine the demodulation result with the demodulation result of the packet whose RSN is 1 after offset in Batch 1, and use the combined result Decoding is performed, the packet with the correct CRC of the decoding result is reconstructed, the retransmission packet with the RSN of 1 that is demodulated in Batch 2 is cancelled out the reconstructed packet, and the UE corresponding to the packet with the incorrect CRC of the decoding result is sent. retransmit packets;

In Batch 3, re-demodulate the packet whose RSN is 1 after the offset of Batch 2; until the CRC of the decoding result of all the packets is correct or the number of packet retransmissions reaches the preset maximum value, the current processing ends.

Preferably, the device is further configured to determine that there is a Batch with unallocated resources before the current Batch, and to determine that the demodulated packet in the current Batch is a new packet and the current Batch is not Batch 3, use the demodulation results of the packets in the current Batch to perform decoding.

Preferably, the device is further configured to determine that the demodulated group in the current Batch is a new group, and the new group is any one of the following groups:

The retransmission packet of the packet whose number of retransmissions reaches the preset maximum value;

Groups whose RSN is 0;

The retransmission packet of the packet with the correct CRC of the decoding result;

For a retransmitted packet that is demodulated for the first time, the RSN of the packet is not 3 and is not greater than the RSN of the packet corresponding to the packet at the last transmission.

Preferably, the device is further configured to determine that there is a Batch with unallocated resources before the current Batch, and to determine that the demodulated packet in the current Batch is not a new packet and the current Batch is not Batch 3, compare the demodulation result of the packet in the current Batch with the The demodulation results of the packets in the previous batch of allocated resources of the current batch are combined, and the combined results are used for decoding.

Preferably, the device is further configured to: store the result of the first demodulation of the packet whose RSN is 0 in Batch 1 in the physical buffer memory Buffer A, and store the result of the second demodulation of the packet whose RSN is 0 in Batch 2 The result is stored in physical Buffer B, and the result of the re-demodulation of the packet whose RSN is 0 in Batch 3 is stored in physical Buffer A, and the mapping from Buffer 2 to physical Buffer B and the mapping from Buffer 1 to physical Buffer A are established. The demodulation result is decoded;

Store the result of the first demodulation of the packets whose RSN is not 0 in Batch 1 to physical Buffer B, establish the mapping from Buffer 2 to physical Buffer B, and the mapping from Buffer 1 to physical Buffer A, and use the demodulation result in Buffer 2 for translation code;

Store the result of the second demodulation of the packets whose RSN is not 0 in Batch 2 to physical Buffer A, establish the mapping from Buffer 2 to physical Buffer A, and the mapping from Buffer 1 to physical Buffer B, and use the demodulation result of Buffer 2 for interpretation code;

Store the result of re-demodulation of packets with a non-zero RSN in Batch 3 into physical Buffer B, and establish the mapping from Buffer 2 to physical Buffer B and the mapping from Buffer 1 to physical Buffer A.

FIG. 2 is a schematic structural diagram of a HARQ combining and decoding apparatus according to an embodiment of the present invention. As shown in FIG. 2 , the apparatus includes: a first combining and decoding unit 21 , a second combining and decoding unit 22 and a third combining unit 23; of which,

The first combined decoding unit 21 is used to perform the first demodulation and decoding on the packet whose RSN is 0 first sent by the UE in Batch 1, reconstruct the correct CRC of the decoding result, and convert the received packet. Offset the reconfigured grouping; in Batch 1, the retransmission grouping with RSN of 1 is demodulated for the first time, the demodulation result is combined with the demodulation result of Batch 3, and the combined result is used for decoding, Reconstruct the correct grouping of the decoding result CRC, and offset the original retransmission grouping with the RSN of 1 for demodulation in Batch 1 against the reconstructed grouping;

The second merging and decoding unit 22 is configured to perform second demodulation and decoding on the canceled packet in Batch 2, reconstruct the correct CRC packet of the decoding result, and perform demodulation in Batch 2 The decoded original packet cancels the reconstructed packet in Batch 2, and causes the UE corresponding to the CRC error packet of the decoding result to retransmit the packet; Secondary demodulation, combine the demodulation result with the demodulation result of the packet whose RSN is 1 after the offset of Batch 1, use the combined result to decode, reconstruct the packet with the correct CRC of the decoding result, and demodulate the batch 2 The retransmission packet whose RSN is 1 cancels the reconstructed packet, and makes the UE retransmit the packet corresponding to the packet with the CRC error of the decoding result;

The third merging unit 23 is used to re-demodulate the packet after the offset in Batch 2 in Batch 3; in Batch 3, the packet whose RSN is 1 after the offset of Batch 2 is re-demodulated; until the first merging If the CRC of the decoding results of all the packets of the decoding unit and the second combined decoding unit is correct or the number of retransmissions of the packets reaches a preset maximum value, the current processing ends.

Preferably, the first combined decoding unit 21 and the second combined decoding unit 22 are also used to determine that there is a Batch with unallocated resources before the current Batch, and to determine that the demodulated packet in the current Batch is a new packet and the current Batch When it is not Batch 3, use the demodulation result of the packet in the current Batch for decoding.

Preferably, the first combined decoding unit 21 and the second combined decoding unit 22 are also used to determine any one of the following groups as a new group:

The retransmission packet of the packet whose number of retransmissions reaches the preset maximum value;

Groups whose RSN is 0;

The retransmission packet of the packet with the correct CRC of the decoding result;

For a retransmission packet that is demodulated for the first time, the RSN of the packet is not 3 and is not greater than the RSN of the packet corresponding to the packet at the last transmission.

Preferably, the first combined decoding unit 21 and the second combined decoding unit 22 are also used to determine that there is a Batch with unallocated resources before the current Batch, and to determine that the demodulated packet in the current Batch is not a new packet and the current Batch When it is not in Batch 3, the demodulation result of the packet in the current Batch is combined with the demodulation result of the packet in the batch that allocates resources before the current Batch, and the combined result is used for decoding.

Preferably, the first combining and decoding unit 21 is further configured to store the result of the first demodulation of the packet whose RSN is 0 in Batch 1 in Buffer A, and use the demodulation result in Buffer 2 for decoding; Store the result of the first demodulation of the packet with the non-zero RSN of Batch 1 in physical Buffer B, and use the demodulation result in Buffer 2 to decode;

The second merging and decoding unit 22 is also used to store the result of the second demodulation of the packet whose RSN is 0 in the Batch 2 into the physical Buffer B, and utilize the demodulation result in the Buffer 2 for decoding; The result of the second demodulation of the packet whose RSN is not 0 is stored in physical Buffer A, and the demodulation result in Buffer 2 is used for decoding;

The third merging unit 23 is also used to store the result of the packet re-demodulation with RSN of 0 in Batch 3 to physical Buffer A;

The apparatus further includes: a mapping unit 24, configured to store, in the first decoding and combining unit 21, the result of the first demodulation of the packet whose RSN is 0 in Batch1 to the physical Buffer A, and the second combining and decoding result. The code unit 22 stores the result of the second demodulation of the packet whose RSN is 0 in Batch 2 into the physical Buffer B, and the third merging unit 23 stores the result of the re-demodulation of the packet whose RSN is 0 in Batch 3 into the physical Buffer At the time of A, the mapping from Buffer 2 to physical Buffer B and the mapping from Buffer 1 to physical Buffer A are established; the first combining and decoding unit 21 stores the result of the first demodulation of the packets with RSN non-0 in Batch 1 to When physical Buffer B is used, the mapping from Buffer 2 to physical Buffer B and the mapping from Buffer 1 to physical Buffer A are established; the second merging and decoding unit 22 demodulates the packet whose RSN is not 0 in Batch 2 for the second time. When the result is stored in physical Buffer A, the mapping from Buffer 2 to physical Buffer A and the mapping from Buffer 1 to physical Buffer B are established; the third merging unit 23 re-demodulates the result of re-demodulation of the packets whose RSN is not 0 in Batch 3 When storing to physical Buffer B, establish the mapping from Buffer 2 to physical Buffer B, and the mapping from Buffer 1 to physical Buffer A.

Example 1

The following identifiers are maintained for grouping in the Batch, and the identifiers described in this embodiment are binary:

1) The sequence of demodulating the packet is identified by Demodnum: when Demodnum is 1, the packet may be demodulated for the first time (1st demod). For example, in Table 1, Batch 1 in Cases 1 to 4 is allocated resources, and it may also be repeated. Demodulation (Redemod), as shown in Case 7 in Table 1, at this time, Batch 1 and Batch 2 do not allocate resources, and Batch 3 allocates resources, so only re-demodulation is performed; when Demodnum is 10, the packet may be demodulated for the second time ( 2nd demod), such as Case 1 and 2 in Table 1, at this time, both Batch 1 and Batch 2 allocate resources, and it is also possible to re-demodulate the packet, such as Case 3 and 5 in Table 1; For example, Case 1 in Table 1. At this time, Batch 1 to Batch 3 are all allocated resources, so the re-demodulation is the third demodulation in the demodulation sequence.

Scene (Case) Batch 1 Batch 2 Batch 3 Case 1 1st demod 2nd demod Redemod Case 2 1st demod 2nd demod Unallocated resources Case 3 1st demod Unallocated resources Redemod Case 4 1st demod Unallocated resources Unallocated resources Case 5 Unallocated resources 1st Demo Redemod Case 6 Unallocated resources 1st Demo Unallocated resources Case 7 Unallocated resources Unallocated resources Redemod

Table 1

Among them, when the packet is a new packet, the HARQNum of the packet is 0, and the HARQNum of the packet is increased by 1 each time a retransmission packet of the packet is subsequently received. Correspondingly, each time a retransmission packet of the packet is received, the packet will be The first demodulation or re-demodulation is performed, that is, when the Demodnum of the packet is 1, the HARQNum of the packet is incremented by 1.

2) RSNCur and RSNReg: RSNCur stores the RSN of the current grouping. If the current grouping is not demodulated for the first time, RSNReg is used to store the RSN when the grouping corresponding to this grouping was last transmitted; RSNCur and RSNCur are updated respectively during the packet demodulation. RSNReg;

3) CombReg 2: The demodulation result of the retransmission packet corresponding to the packet in the current Batch needs to be combined. If the packet is demodulated for the first time or the second demodulation in the current Batch, the retransmission packet of the packet needs to be combined. The demodulation result needs to be merged with the demodulation result of this grouping in the Batch that allocates resources before, the corresponding parameter is set to 1, and the parameter is set to 0 when the current Batch is a new grouping, no need to be merged, and the new grouping is Any of the following groups:

a) the retransmission packet of the packet whose HARQNum reaches the preset maximum value;

b) The grouping whose RSNCur is 0;

c) The retransmission packet of the packet whose decoding result CRC is correct (OK);

d) Carry out the retransmission packet of the first demodulation (Demodnum is 1), the RSNCur of the retransmission packet is not 3 and does not exceed RSNReg, and the condition that the retransmission packet is a new packet is represented by a Boolean expression:

RSNCur<=RSNReg&&RSNCur～=3&&Demodnum==1;

4) CombReg 1: When CombReg 1 is 1, it indicates that the demodulation result of the packet in the current Batch needs to be combined with the demodulation result of the packet in the previous batch of allocated resources. When CombReg 1 is 0, the identification is not required, and the packet in the current Batch is not When a new group is made and the Demodnum of the group is 1, the value of CombReg 2 of the group is assigned to CombReg 1;

5) HARQNum: identifies the number of retransmissions of the grouping in the Batch, when the Demodnum of the grouping in the Batch is 1, the parameter is incremented by 1, and the parameter is set to 0 when the grouping in the Batch is a new grouping;

6) BufferSwitch 1: Identifies the physical Buffer that stores the demodulation result of the current Batch. Figure 3 is a schematic diagram of the mapping of the physical Buffer in an embodiment of the present invention. As shown in Figure 3, when BufferSwitch 1 is 0, Buffer A is mapped to Buffer 1 , Buffer B is mapped to Buffer 2; when BufferSwitch 1 is 1, Buffer A is mapped to Buffer 2, and Buffer B is mapped to Buffer 1; when the group in the current Batch is a new group, this parameter is set to 0, and the demodulation result of the group in the current Batch When merging is required (that is, CombReg 1 of the current Batch group is 1) and Demodnum is 1, assign the updated value of BufferSwitch 2 to BufferSwitch 1;

7) BufferSwitch 2: Identifies the physical Buffer that stores the retransmission packets grouped in the current Batch. If the grouping in the current Batch is a new group and Demodnum is 1, set BufferSwitch 2 to 1; if the demodulation result of the current group needs to be processed Merge and Demodnum is 1, then the current value of BufferSwitch 2 is reversed;

The schematic flow chart of the implementation of combining the demodulation results according to the maintained identifier and using the demodulation results for decoding is shown in Figure 4a. When performing the first demodulation (1st demod) for a packet whose RSN is 0, the packet is received. The maximum ratio combining (MRC, Maximal Ratio Combining) diversity receiving technology can be used, the demodulation result of the packet is stored in Buffer 2 in Batch 1, and the demodulation result in Buffer 2 is used for decoding, and the decoding result is reconstructed The CRC of the correct packet, the received packet offset the reconstructed packet;

Perform the second demodulation (2nd demod) on the canceled packet in Batch 2, store the demodulation result in Buffer 2, and use the demodulation result in Buffer 2 to decode, and reconstruct the CRC of the decoded result Correct grouping, offset the original grouping that is demodulated and decoded in Batch 2 against the reconstructed grouping in Batch 2, and make the UE corresponding to the CRC error grouping of the decoding result retransmit the grouping;

In Batch 3, re-demodulate the canceled packets in Batch 2, and store the demodulation result in Buffer1;

In Batch 1, demodulate the retransmission packet whose RSN is 1 for the first time, combine the demodulation result with the demodulation result of Buffer 1 and store it in Buffer 2, use the demodulation result in Buffer 2 for decoding, and reconstruct the decoding The CRC of the code result is correct, and the RSN is 1 to retransmit the packet to offset the reconstructed packet;

In Batch 2, perform the second demodulation on the retransmission packet whose RSN is 1, combine the demodulation result with the demodulation result of Buffer 1 and store it in Buffer 2, use the demodulation result in Buffer 2 for decoding, and reconstruct the decoding The CRC of the code result is correct, and the RSN is 1 to retransmit the packet to offset the reconstructed packet;

In Batch 3, re-demodulate the canceled packet in Batch 2, and store the demodulation result in Buffer 1; until the decoding result of all packets is CRC OK or the number of packet retransmissions reaches the preset maximum value, the current processing ends.

Among them, Buffer 1 and Buffer 2 are the mappings to the physical Buffer 1 and the physical Buffer 2. According to the above identification, it can be determined whether to combine the demodulation results, and the demodulation results are always read from the Buffer 2 for decoding. The present invention In an embodiment, a schematic flow diagram of the implementation of combining and decoding using group identifiers is shown in Figure 4b, including:

Steps 401 to 402: demodulate the grouping in the current Batch, and determine whether the grouping in the current Batch is a new grouping, if so, go to step 403, otherwise go to step 410;

Step 403: Whether the Demonum grouped in the current Batch is 1, if so, go to Step 404, otherwise go to Step 405;

Step 404: Set BufferSwitch 1 grouped in the current Batch to 0, and set BufferSwitch 2 to 1;

Step 405: Keep the values of BufferSwitch 1 and BufferSwitch 2 grouped in the current Batch unchanged;

Step 406: the demodulation results of the packets in the current Batch are stored in Buffer 2;

Step 407: If the current Batch is Batch 3, go to Step 408: Otherwise, go to Step 409 without decoding;

Step 408: use the demodulation result in Buffer 2 to decode;

Step 410: determine whether the group Demonum in the current Batch is 1, if so, go to step 411, otherwise go to step 412;

Step 411: Invert the value of BufferSwitch 2 grouped in the current Batch, and assign it to BufferSwitch1;

Step 412: Keep the values of BufferSwitch 1 and BufferSwitch 2 grouped in the current Batch unchanged;

Step 413: The demodulation result of Buffer 1 and the demodulation result of the packet in the current Batch are combined and stored in Buffer 2;

Step 414: If the current Batch is Batch 3, go to Step 415: Otherwise, go to Step 416 without decoding;

Step 415: Use the demodulation result in Buffer 2 for decoding.

Embodiment 2

In yet another embodiment of the present invention, for the scenarios shown in Case 1 to Case 7 in Table 1 above, according to the technical solution of the embodiment of the present invention, the specific processing flow of combining decoding is described:

1)Case 1

If the current packet is a new packet, that is, it does not need to be merged, then CombReg1 is 0, BufferSwitch 1 is 0, and BufferSwitch 2 is 1; when 1st demod is performed, the demodulation result of the packet is stored in Buffer 2, and the demodulation in Buffer2 is used. Result decoding; when performing 2nd demod, BufferSwitch 1 is 0, BufferSwitch 2 is 1, the demodulation result is stored in Buffer 2, and decoded with the result in Buffer 2; when Redemod is performed, BufferSwitch 1 is 0, BufferSwitch 2 is 1, The demodulation result is stored in Buffer 2 without decoding;

If the current packet is not a new packet, the demodulation results of the packets need to be combined, and the corresponding CombReg 1 is 1; when the 1st demod is performed, if the initial value of BufferSwitch 2 is 0, the initial value of 0 is assigned to BufferSwitch 1, and the BufferSwitch 2 Inversion is 1; if the initial value of BufferSwitch 2 is 1, the initial value of 1 is assigned to BufferSwitch1, and the inversion of the value of BufferSwitch 2 is 0; the demodulation result of Buffer 1 and the current demodulation result are combined and stored in Buffer 2, Use the demodulation result in Buffer 2 for decoding; when performing 2nd demod, keep the values of BufferSwitch 1 and BufferSwitch 2 unchanged, combine the demodulation result of Buffer 1 with the current demodulation result and store it in Buffer 2, use Buffer The result of demodulation in 2 is decoded; when performing Redemod, if Demodnum is 1 and the initial value of BufferSwitch 2 is 0, the initial value of 0 is assigned to BufferSwitch 1, and the value of BufferSwitch 2 is reversed to 1; if the initial value of BufferSwitch 2 is 1; 2 If the initial value is 1, assign the initial value to BufferSwitch 1, and reverse the value of BufferSwitch 2 to 0; if Demodnum is not 1, keep the values of BufferSwitch 1 and BufferSwitch2 unchanged, and demodulate the demodulation in Buffer 1 As a result, it is combined with the demodulation result of the packet in the current Batch and stored in Buffer 2 without decoding;

2)Case 2

If the current packet is a new packet, CombReg 1 is 0, BufferSwitch 1 is 0, and BufferSwitch 2 is 1; when performing 1st demod, the demodulation result is stored in Buffer 2, and decoded with the demodulation result in Buffer 2; when performing 2nd demod , the demodulation result is stored in Buffer 2, and the demodulation result in Buffer 2 is used for decoding;

If the current group is not a new group, CombReg 1 is 1. When performing 1st demod, if the initial value of BufferSwitch 2 is 0, the initial value is assigned to BufferSwitch 1, and the initial value of BufferSwitch 2 is reversed to 1; if BufferSwitch 2 The initial value is 1, then BufferSwitch 1 is 1 (the initial value of BufferSwitch 2 is assigned to BufferSwitch 1), and BufferSwitch 2 is 0 (the initial value of BufferSwitch 2 is reversed to 0). Combine the demodulation result in Buffer 1 with the demodulation result of the current packet and store it in Buffer2, and use the demodulation result in Buffer2 to decode; when performing 2nd demod, keep the values of BufferSwitch 1 and BufferSwitch 2 unchanged, and store the BufferSwitch 1 and BufferSwitch 2 values. The demodulation result in 1 is combined with the demodulation result of the current packet and stored in Buffer 2, and the demodulation result in Buffer 2 is used for decoding;

3)Case 3

If the current packet is a new packet, CombReg 1 is 0, BufferSwitch 1 is 0, and BufferSwitch 2 is 1. When performing 1st demod, the demodulation result is stored in Buffer 2, and the demodulation result in Buffer 2 is used for decoding; redemod When BufferSwitch 1 is 0 and BufferSwitch 2 is 1, the demodulation result is stored in Buffer 2 without decoding;

If the current group is an old group, CombReg 1 is 1; during 1st demod, if the initial value of BufferSwitch2 is 0, then BufferSwitch 1 is 0 (the initial value of BufferSwitch 2 is assigned to BufferSwitch1), and BufferSwitch 2 is 1 (the initial value of BufferSwitch 2 The inverse of 0 is 1); if the initial value of BufferSwitch2 is 1, then BufferSwitch 1 is 1, and BufferSwitch 2 is 0, read the demodulation result in Buffer1, merge it with the demodulation result of the current packet, and store it in Buffer 2, using Buffer 2 Decoding the demodulation result in The inverse value of 0 is 1); if Demodnum is 1 and the initial value of BufferSwitch 2 is 1, then BufferSwitch1 is 1 and BufferSwitch 2 is 0; if Demodnum is not 1, keep the values of BufferSwitch 1 and BufferSwitch 2 unchanged, and set Buffer1 The demodulation result in , and the demodulation result of the current packet are combined and stored in Buffer 2 without decoding;

4)Case 4

If the current packet is a new packet, CombReg1 is 0; when performing 1st demod, BufferSwitch 1 is 0, BufferSwitch 2 is 1, the demodulation result is stored in Buffer 2, and the demodulation in Buffer 2 is used for decoding;

If the current group is not a new group, CombReg1 is 1; when performing 1st demod, if the initial value of BufferSwitch 2 is 0, then BufferSwitch 1 is 0 (the initial value of BufferSwitch 2 is assigned to BufferSwitch 1), and BufferSwitch 2 is 1; if the initial value of BufferSwitch 2 is 1 If the value is 1, then BufferSwitch 1 is 1 (the initial value of BufferSwitch2 is assigned to BufferSwitch 1), and BufferSwitch 2 is 0 (the initial value of BufferSwitch2 is reversed to 0). The modulation results are combined and stored in Buffer 2, and the demodulation results in Buffer 2 are used for decoding;

5)Case 5

If the current packet is a new packet, CombReg1 is 0, BufferSwitch 1 is 0, and BufferSwitch 2 is 1; when 1st demod is performed, the demodulation result is stored in Buffer 2, and the demodulation result in Buffer 2 is used for decoding; when Redemod is performed, When BufferSwitch 1 is 0 and BufferSwitch 2 is 1, the demodulation result is stored in Buffer 2 without decoding;

If the current group is not a new group, CombReg 1 is 1; when performing 1st demod, if the initial value of BufferSwitch 2 is 0, then BufferSwitch 1 is 0 (the initial value of BufferSwitch 2 is assigned to BufferSwitch 1), and BufferSwitch 2 is 1 (the initial value of BufferSwitch 2 is 0). If the initial value of BufferSwitch 2 is 1, then BufferSwitch 1 is 1 and BufferSwitch 2 is 0. The demodulation result in Buffer 1 and the demodulation result of the current packet are combined and stored in Buffer 2 , use the demodulation result in Buffer 2 for decoding; when performing Redemod, if Demodnum is 1 and the initial value of BufferSwitch 2 is 0, then BufferSwitch 1 is 0 (the initial value of BufferSwitch 2 is assigned to BufferSwitch 1), and BufferSwitch 2 is 1 (The initial value of BufferSwitch 2 is 0 and the inverse value is 1); if Demodnum is 1 and the initial value of BufferSwitch 2 is 1, then BufferSwitch 1 is 1 and BufferSwitch 2 is 0; if Demodnum is not 1, the values of BufferSwitch 1 and BufferSwitch 2 are kept. If the value remains unchanged, the demodulation result in Buffer 1 and the current packet demodulation result are combined and stored in Buffer 2 without decoding;

6)Case 6

If the current packet is a new packet, CombReg 1 is 0; when performing 1st demod, BufferSwitch 1 is 0, BufferSwitch 2 is 1, the demodulation result of the current packet is stored in Buffer 2, and the demodulation result in Buffer 2 is used for decoding;

If the current group is not a new group, CombReg 1 is 1; when performing 1st demod, if the initial value of BufferSwitch 2 is 0, then BufferSwitch 1 is 0 (the initial value of BufferSwitch 2 is assigned to BufferSwitch 1), and BufferSwitch2 is 1; if the initial value of BufferSwitch 2 is 0 If the value is 1, then BufferSwitch 1 is 1 (the initial value of BufferSwitch 2 is assigned to BufferSwitch 1), BufferSwitch 2 is 0 (the initial value of BufferSwitch 2 is reversed to 0), read the demodulation result of Buffer1, and the current demodulation result After merging, it is stored in Buffer 2, and the demodulation result in Buffer 2 is used for decoding;

7)Case 7

If the current packet is a new packet, CombReg 1 is 0; when Redemod is performed, BufferSwitch 1 is 0, BufferSwitch 2 is 1, and the demodulation result of the current packet is stored in Buffer 2 without decoding;

If the current group is an old group, CombReg 1 is 1; when performing Redemod, if Demodnum is 1 and the initial value of BufferSwitch 2 is 0, then BufferSwitch 1 is 0 and BufferSwitch 2 is 1; if Demodnum is 1 and the initial value of BufferSwitch 2 is 1 , then BufferSwitch 1 is 1 and BufferSwitch 2 is 0; if Demodnum is not 1, keep the values of BufferSwitch 1 and BufferSwitch 2 unchanged; the demodulation result in Buffer 1 and the demodulation result of the current packet are combined and stored in the Buffer 2, no decoding is performed.

Embodiment 3

The HARQ combined decoding method in the embodiment of the present invention is also applicable to scenarios of hardware exceptions that cause packet loss. The following describes the processing of HARQ combined decoding in different abnormal scenarios:

1) Case 1, as shown in Figure 5a:

The packet whose RSN is 0 (marked by vertical line shading) is abnormally lost during transmission, and the retransmitted packet whose RSN is 1 (marked by slashed shading) is regarded as a new packet, and is combined and decoded. Correspondingly, CombReg 1 is 0, CombReg 2 is 0, HarqNum is 0, and since the packet is demodulated in the Batch (ie, Batch 1) whose batch sequence number (Batchid) is 1, the above-mentioned identification and the first embodiment are group maintenance. Other identifiers are processed according to the scene corresponding to the second embodiment;

2) Case 2, as shown in Figure 5b:

The grouping with RSN of 1 (marked by vertical line shading) is lost, and the grouping with RSN of 0 (marked with slanted line shading) is processed according to the scene corresponding to the second embodiment; the grouping with RSN of 2 is regarded as the same as RSN The first retransmitted packet corresponding to the packet of 0, that is, HarqNum is 1, correspondingly, CombReg 1 is 1, and CombReg2 is 1. According to the above-mentioned identification and other identifications maintained for the grouping in the first embodiment, according to the corresponding identification in the second embodiment. The scene is processed; .

3) Case 3, as shown in Figure 5c:

After retransmitting the packet whose RSN is 1, and then retransmitting the packet whose RSN is 1 (marked with vertical line shading), the retransmission packet (marked with vertical line shading) is lost, it means that the RSN is 1 in the first retransmission An abnormality occurs during the grouping, resulting in packet loss, and the grouping before the RSN is 1 (marked with a vertical line shadow) is processed according to the scene corresponding to the second embodiment; for the subsequent retransmission RSN is 1 grouping ( Marked with vertical line shading), since the identification of this grouping satisfies: RSNCur<=RSNReg&&RSNCur～=3&&Demodnum, then this grouping is regarded as a new grouping, so CombReg 1 of this grouping is 0, CombReg 2 is 0, HarqNum is 0, according to the above The identifier and other identifiers maintained for the group in the first embodiment are processed according to the scenario corresponding to the second embodiment;

4) Case 4, as shown in Figure 5d:

The decoding result of the packet whose RSN is 0 is CRC OK, and the packet is subsequently retransmitted (marked by vertical line shading), indicating an abnormality. The grouping that is 1 is the retransmission grouping of the CRCOK grouping, then the grouping is regarded as a new grouping. Correspondingly, the CombReg1 of the grouping is 0, the CombReg2 is 0, and the HarqNum is 0. According to the above identification and Embodiment 1, it is Other identifiers maintained by the group are processed according to the scenario corresponding to the second embodiment; for the group with RSN 2, since the group with RSN 1 has no CRC result, the result of CRC OK of the group with RSN 0 will be used by default. As the CRC result of the packet whose RSN is 1, the packet whose RSN is 2 is still the retransmission packet of the CRCOK packet, so this packet is regarded as a new packet. Correspondingly, the CombReg 1 of the packet whose RSN is 2 is 0, and the CombReg 2 is 0, and HarqNum is 0. According to the above-mentioned identification and other identifications maintained for the group in the first embodiment, the processing is performed according to the scene corresponding to the second embodiment;

5) Case 5, as shown in Figure 5e:

When the first demodulation is performed on the grouping with RSN of 0 and the grouping with RSN of 1, it is processed according to the scene corresponding to the second embodiment; the grouping with RSN of 1 and re-decoded (marked with vertical line shading) is processed When the number of retransmissions of the previous packet reaches the maximum value, the subsequent retransmission packet is regarded as a new packet. Correspondingly, the CombReg 1 of the packet is 0, the CombReg 2 is 0, and the HarqNum is 0. According to the above identification and Embodiment 1 The other identifiers maintained for this grouping in the above are processed according to the scene corresponding to the second embodiment; for the grouping whose RSN is 2, since the grouping does not meet the conditions of the new grouping described in the embodiment, the CombReg1 of the grouping is 1, CombReg2 is 1, and the Demodnum of the group is 1, then HarqNum needs to be increased by 1 relative to the original value, that is, HarqNum is 1, according to the above identification and other identifications maintained for the group in the first embodiment, according to the same as in the second embodiment. The corresponding scene is processed;

6) Case 6, as shown in Figure 5f:

When the packets with RSN of 0 and RSN of 1 are demodulated for the first time, they are processed according to the scene corresponding to the second embodiment; The number of retransmissions of the packet whose RSN is 1 before the grouping reaches the maximum value. Therefore, the CombReg 1 of the packet whose RSN is 1 (marked by vertical line shading) is 0, CombReg 2 is 0, and HarqNum is 0. According to the above identification and the embodiment The other identifiers maintained for the group in the first step are processed according to the scenario corresponding to the second embodiment; the group whose RSN is 2 is still the retransmission group of the group whose number of retransmissions reaches the maximum value, that is, a new group, so the group CombReg 1 is 0, CombReg 2 is 0, and HarqNum is 0. According to the above-mentioned identification and other identifications maintained for this grouping in the first embodiment, the processing is performed according to the scene corresponding to the second embodiment;

7) Case 7, as shown in Figure 5g:

In this scenario, the preset maximum number of retransmissions is 2, and a hardware abnormality results in the transmission of a packet with an RSN of 3 (marked by a vertical line shade), which is the retransmission packet of the packet that reaches the maximum number of retransmissions. As a new group, the value of HARQnum of the group will increase, but since the group is processed in Batch 3, the demodulation result is not used for decoding, and the corresponding CombReg 2 of the group is still 1, CombReg 1 is 1, and CombReg 2 is 1. According to the above identifier and other identifiers maintained for the group in the first embodiment, the processing is performed according to the scenario corresponding to the second embodiment.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention.

Claims (8)

1. a hybrid automatic repeat request HARQ combined decoding method, is characterized in that, described method comprises: In the batch batch 1, the packet with the retransmission sequence number RSN of 0 sent by the user terminal UE for the first time is demodulated and decoded for the first time, and the cyclic redundancy check CRC of the decoding result is reconstructed. grouping offsets the reconstructed grouping; Perform the second demodulation and decoding on the canceled packet in Batch 2, reconstruct the correct CRC packet of the decoding result, and cancel the original packet demodulated and decoded in Batch 2 to the reconstructed packet in Batch 2. grouping, and make the UE corresponding to the packet with the CRC error in the decoding result retransmit the packet; In Batch 3, re-demodulate the packet after Batch 2 cancellation; In Batch 1, demodulate the retransmission packet whose RSN is 1 for the first time, combine the demodulation result with the demodulation result of Batch 3, and use the combined result for decoding, and reconstruct the decoding result with correct CRC. grouping, the original retransmission grouping with the demodulated RSN of 1 in Batch 1 cancels the reconstructed grouping; In Batch 2, perform the second demodulation on the retransmission packet whose RSN is 1 after the offset of Batch 1, combine the demodulation result with the demodulation result of the packet whose RSN is 1 after the offset of Batch 1, and use the combined result to decode code, reconstruct the packet with the correct CRC of the decoding result, cancel the retransmitted packet with the RSN of 1 demodulated in Batch 2 to cancel the reconstructed packet, and retransmit the UE corresponding to the packet with the incorrect CRC of the decoding result. grouping; In Batch 3, re-demodulate the packet whose RSN is 1 after the offset of Batch 2; until the CRC of the decoding result of all the packets is correct or the number of packet retransmissions reaches the preset maximum value, the current processing ends. 2. The method according to claim 1, wherein the method further comprises: Determine that there is a Batch with unallocated resources before the current Batch, and determine that the demodulated grouping in the current Batch is a new grouping and the current Batch is not Batch 3, use the demodulation result of the grouping in the current Batch for decoding; wherein, The described determining that the demodulated grouping in the current Batch is a new grouping includes: determining that any of the following groups in the current Batch is a new grouping: The retransmission packet of the packet whose number of retransmissions reaches the preset maximum value; Groups whose RSN is 0; The retransmission packet of the packet with the correct CRC of the decoding result; For a retransmitted packet that is demodulated for the first time, the RSN of the packet is not 3 and is not greater than the RSN of the packet corresponding to the packet at the last transmission. 3. The method according to claim 2, wherein the method further comprises: Determine that there is a batch with unallocated resources before the current batch, and determine that the demodulated packet in the current batch is not a new packet and the current batch is not batch 3, compare the demodulation result of the packet in the current batch with the batch that allocated resources before the current batch. The demodulation results of the packets are combined and decoded using the combined results. 4. The method according to claim 1, 2 or 3, wherein the method further comprises: Store the result of the first demodulation of the packet whose RSN is 0 in Batch 1 in the physical buffer memory Buffer A, store the result of the second demodulation of the packet whose RSN is 0 in Batch 2 into the physical Buffer B, and store the result of the second demodulation of the packet in Batch 3 The result of the re-demodulation of the packet whose RSN is 0 is stored in physical Buffer A, the mapping from Buffer 2 to physical Buffer B and the mapping from Buffer 1 to physical Buffer A are established, and the demodulation result in Buffer 2 is used for decoding; Store the result of the first demodulation of the packets whose RSN is not 0 in Batch 1 to physical Buffer B, establish the mapping from Buffer 2 to physical Buffer B, and the mapping from Buffer 1 to physical Buffer A, and use the demodulation result in Buffer 2 to perform decoding; Store the result of the second demodulation of the packets whose RSN is not 0 in Batch 2 to physical Buffer A, establish the mapping from Buffer 2 to physical Buffer A, and the mapping from Buffer 1 to physical Buffer B, and use the demodulation result in Buffer 2 decode; Store the result of re-demodulation of packets with a non-zero RSN in Batch 3 into physical Buffer B, and establish the mapping from Buffer 2 to physical Buffer B and the mapping from Buffer 1 to physical Buffer A. 5. A HARQ combining and decoding device, characterized in that the device comprises: a first combining and decoding unit, a second combining and decoding unit, and a third combining unit; wherein, The first combining and decoding unit is used to demodulate and decode the packet whose RSN is 0 sent by the UE for the first time in Batch 1, reconstruct the correct CRC packet of the decoding result, and cancel the received packet. The reconstructed grouping; in Batch 1, the retransmission grouping with RSN of 1 is demodulated for the first time, the demodulation result is combined with the demodulation result in Batch 3, and the combined result is used for decoding, Reconstruct the correct grouping of the decoding result CRC, and offset the original retransmission grouping with the RSN of 1 for demodulation in Batch 1 against the reconstructed grouping; The second merging and decoding unit is used for performing the second demodulation and decoding on the offset grouping in Batch 2, reconstructing the correct grouping of the CRC of the decoding result, and performing demodulation and decoding in Batch 2 The original packet of the code cancels the reconstructed packet in Batch 2, and causes the UE to retransmit the packet corresponding to the packet with the CRC error in the decoding result; First demodulate, combine the demodulation result with the demodulation result of the packet whose RSN is 1 after the offset of Batch 1, use the combined result to decode, reconstruct the packet with the correct CRC of the decoding result, and demodulate the packet in Batch 2. The retransmission packet whose RSN is 1 cancels the reconstructed packet, and makes the UE retransmit the packet corresponding to the packet whose CRC error in the decoding result is sent; The third merging unit is used to re-demodulate the packet after the offset of Batch 2 in Batch 3; in Batch 3, re-demodulate the packet whose RSN is 1 after the offset of Batch 2; If the CRC of the decoding results of all the packets of the code unit and the second combined decoding unit is correct or the number of packet retransmissions reaches a preset maximum value, the current processing ends. 6. The device of claim 5, wherein: The first combined decoding unit and the second combined decoding unit are also used to determine that there is a Batch with unallocated resources before the current Batch, and to determine that the demodulated packet in the current Batch is a new packet and the current Batch is not Batch 3, Use the demodulation result of the group in the current Batch to decode; The first combined decoding unit and the second combined decoding unit are also used to determine that any one of the following groups in the current Batch is a new group: The retransmission packet of the packet whose number of retransmissions reaches the preset maximum value; Groups whose RSN is 0; The retransmission packet of the packet with the correct CRC of the decoding result; For a retransmitted packet that is demodulated for the first time, the RSN of the packet is not 3 and is not greater than the RSN of the packet corresponding to the packet at the last transmission. 7. The device of claim 6, wherein The first combined decoding unit and the second combined decoding unit are also used to determine that there is a Batch with unallocated resources before the current Batch, and to determine that the demodulated packet in the current Batch is not a new packet and the current Batch is not Batch 3, The demodulation result of the packet in the current Batch is merged with the demodulation result of the packet in the batch allocated resources before the current Batch, and the merged result is used for decoding. 8. The device according to claim 5, 6 or 7, characterized in that, The first merging and decoding unit is also used to store the result of the first demodulation of the packet whose RSN is 0 in Batch 1 into Buffer A, and utilize the demodulation result in Buffer 2 for decoding; The result of the first demodulation of the packet whose RSN is not 0 is stored in physical Buffer B, and the demodulation result in Buffer 2 is used for decoding; The second merging and decoding unit is also used to store the result of the second demodulation of the packet whose RSN is 0 in Batch 2 into physical Buffer B, and utilize the demodulation result in Buffer 2 for decoding; The result of the second demodulation of the packet whose RSN is not 0 is stored in physical Buffer A, and the demodulation result in Buffer 2 is used for decoding; The third merging unit is also used to store the result of the packet re-demodulation with RSN 0 in Batch 3 to physical Buffer A; The apparatus further includes: a mapping unit, configured to store, in the first combining and decoding unit, a result of the first demodulation of the packet whose RSN is 0 in Batch 1 to a physical buffer memory Buffer A, and the second combining The decoding unit stores the result of the second demodulation of the packet whose RSN is 0 in Batch 2 into physical Buffer B, and the third merging unit stores the result of the re-demodulation of the packet whose RSN is 0 in Batch 3 into physical Buffer A When , the mapping from Buffer 2 to physical Buffer B and the mapping from Buffer 1 to physical Buffer A are established; the first combining and decoding unit stores the result of the first demodulation of the packets whose RSN is not 0 in Batch 1 into the physical Buffer When B, the mapping from Buffer 2 to physical Buffer B and the mapping from Buffer 1 to physical Buffer A are established; in the second combining and decoding unit, the second demodulation result of the packet whose RSN is not 0 in Batch 2 is stored in the When physical Buffer A is used, the mapping from Buffer 2 to physical Buffer A and the mapping from Buffer 1 to physical Buffer B are established; the third merging unit stores the result of re-demodulation of packets whose RSN is not 0 in Batch 3 into physical Buffer When B, the mapping from Buffer 2 to physical Buffer B and the mapping from Buffer 1 to physical Buffer A are established.