WO2003081837A1

WO2003081837A1 - An automatic repeat request arq error control method for different channels and the device thereof

Info

Publication number: WO2003081837A1
Application number: PCT/CN2002/000207
Authority: WO
Inventors: Xiaobin Wu; Xiaohua Liu; Chengming Wu
Original assignee: Linkair Communications, Inc.
Priority date: 2002-03-27
Filing date: 2002-03-27
Publication date: 2003-10-02
Also published as: AU2002252926A1

Abstract

The present invention discloses an automatic repeat request ARQ error control method for different channels and the apparatus thereof, characterized in that the stop and wait ARQ methods in different channels are independent and the data packets are transmitted in parallel. With the help of the relationship between the sequence numbers of the data packets to be sent and resent, it is decided whether the transmission side should send these data packets. The reception of data packets in the reception side is ensured by increasing the sequence number. With the error control method of the present invention, the disordered transmission of data packets in the DSW technology can be implemented by setting the sequence number, which can be applied to the wireless communication system for high speed packet data service and increase the availability of the channel resource.

Description

ARQ error control method and device for automatic retransmission request of different channels

Technical field

The present invention relates to the field of electrical communication technology, and in particular to an automatic retransmission request for different channels.

ARQ error control method and device. Background technique

Compared with the second generation mobile communication system, the third generation mobile communication system is required to support multiple services such as voice, image, and data, especially multimedia and high-bit-rate packet data services. To achieve high data rate transmission, an efficient and reliable communication mechanism must be used. For this reason, a high-dimensional modulation method is applied to a 3G system, thereby increasing the peak rate of the system. However, the problem is that the reliability of the system is seriously challenged. Because on the wireless channel, multipath, shadows, and Doppler frequency shifts will severely degrade the performance of high-dimensional system systems. Random errors and burst errors coexist. If effective measures are not taken, errors in data communications will not be satisfied. ^10-6 is smaller than the required rate. For this reason, in 3G systems, it is recommended to use HARQ (Hybrid Auto Repeat Repeat) as the link error control technology to ensure the quality of service (QoS) requirements.

The rapid development of communication systems and the widespread application of electronic computers require data transmission to provide unprecedented services. Whether it is traditional long-distance data communication, satellite communication, or computer network communication, there are increasingly higher requirements for the reliability of data transmission, making it an urgent problem to be solved in the field of communication.

The reliability of data transmission refers to the performance that the receiver can detect or automatically correct errors caused by noise interference when data is transmitted on the channel. Error control coding technology is one of the most effective methods to improve the reliability of data transmission.

Error correction schemes can be divided into two categories: forward error correction (FEC) methods and retransmission methods. In the FEC method, additional coded bits are added to the source to increase the redundancy of the information. The additional redundancy The degree will enable the destination to correct errors. In the retransmission method, an extra check bit is added to the data packet at the source so that the destination can check the error of the data packet. If the destination detects an error, the destination will automatically request a retransmission of the data packet. This retransmission method is called an automatic retransmission query (RQ) method. The data traffic of the packet network is exchanged to complete data subframes. Communication errors It also often enters the sub-frame. Therefore, it is more effective to use an ARQ method that requires occasional retransmissions than to use FEC coding that adds fixed overhead regardless of whether there is a communication error. A small amount of FEC coding is always helpful to avoid retransmitting data packets with only a small amount of error. Accordingly, in order to generate a low residual error rate in a high data throughput network, it is necessary to use an ARQ with a small amount of FEC. method.

Various ARQ methods are known. Generally, ARQ methods can be divided into numbered ARQ methods and unnumbered ARQ methods. In the numbered ARQ method, each data packet is assigned a group number, which allows the destination to determine which data packets have arrived correctly and which The data packet has arrived by mistake. In this way, the data packet does not have to reach the destination in the order in which they were transmitted from the source. As is well known, packet-switched networks transmit successive packets along different paths with different delays. Therefore, the data packet May arrive out of order. By using the grouping number of the ARQ method, the data packets can be reordered in the correct order at the destination. The well-known numbered ARQ method is to choose the retransmission ARQ method.

In the unnumbered ARQ method, the packet does not have a packet number. Therefore, the unnumbered ARQ method requires less overhead and is therefore easier to implement. However, in order to avoid data packets arriving out of order, the data packets must be transmitted in order . The well-known unnumbered ARQ method is the stop-equation ARQ method, where the source stops and waits until the transmitted data packet is confirmed. For each data packet, before the next data packet can be transmitted from the source, it must be received from the destination Acknowledgement (ACK). However, if a negative acknowledgement (NAK) is received from the destination, the source resends the same data packet again. If no acknowledgement is received, the source automatically resends the same packet after a pause time period Data grouping.

The delay between the transmission of a data packet and the arrival of an acknowledgement is called the round trip delay. The round trip delay determines the data throughput of the network. The longer the round trip delay, the source can launch a new The longer the data packet waits before resending the NAK data packet. Correspondingly, the data throughput on the communication link is inversely proportional to the round-trip delay between the source and destination. Because during the waiting period, the source is idle and no transmission occurs, in order to maintain high data throughput, stop and wait. ARQ method is usually used in networks with short round trip delays. In networks with long round trip delays, the sender needs more time to wait for a response from the receiver after sending data, and will not send new messages during this period. Data packets, which will cause a waste of resources. The traditional method used to solve this problem is to use the selective retransmission ARQ method to transmit data packets. But some communication networks increase data throughput by transmitting data packets in parallel. This network was described by D. Bertsekas and R. Gal lager in the second edition of the "Data Network" of London's Prent ice Hall International, Inc. in 1992. Data packets are multiplexed onto channels based on availability. In order to transmit new data packets on the channel. Each data packet contains a virtual channel number that identifies the channel from which the data packet was transmitted. As a result, the data packets can be transmitted out of order, because the ARQ method of the stop-equation of different channels on each other Independent. In other words, retransmission on one channel will not affect other channels, but will cause data packets to arrive at their destinations out of order. Summary of the Invention

In order to solve the above-mentioned shortcomings and deficiencies in the prior art, the present invention proposes a new DSW ARQ method, that is, a method and a device for automatically resending ARQ error control on different channels. The error control method and device applicable to high-speed wireless packet data services disclosed in the present invention are characterized in that the out-of-sequence transmission of data packets in DSW technology can be realized by setting a sequence number method, and can be applied to high-speed packets In a wireless communication system for data services, the utilization of channel resources is improved.

The present invention provides an ARQ error control method for automatic retransmission requests for different channels, including:

The transmitting end adds a sequence number to the packet data to be sent;

The transmitting end is based on the mutuality of the sequence numbers of the packet data to be transmitted on each single channel of the different channels. Relationship to determine the data sent by the transmitting end;

The receiving end receives the packet data to which the sequence number is added;

Stop-equal ARQ error control on different channels is independent of each other and sends packet data in parallel. The different channels include at least a Chinese channel, and the transmitting end determines the data sent by the transmitting end according to the correlation between the sequence numbers of the packet data to be transmitted on each single channel of the dual channel;

The stop-equation ARQ error control on the Chinese channel is independent of each other and sends packet data in parallel. The different channels described may be multi-channel, and the transmitting end determines the data sent by the transmitting end according to the correlation between the sequence numbers of the packet data to be transmitted on each single channel of the multi-channel;

Stop-equation ARQ error control on multiple channels is independent of each other and sends packet data in parallel. The adding of the sequence number to the packet data to be transmitted by the transmitting end means that the transmitting end first performs a FIFO buffer on the packet data to be transmitted, and then adds a sequence number to the buffered packet data.

The transmitting end determines that the data sent by the transmitting end according to the correlation between the sequence numbers of the packet data to be transmitted on each single channel of the different channels refers to: The transmitting end performs packet processing on the packet data with the increased serial number, and then selects Packet data is transmitted on an appropriate channel, and the packet data may be new packet data or may be retransmitted packet data.

The transmitting end determines that the data sent by the transmitting end according to the correlation between the sequence numbers of the packet data to be transmitted on each single channel of the different channels refers to: The transmitting end performs FIFO buffering on the packet data to be transmitted, and buffers the packet data. Increase the sequence number, perform packet processing on the packet data with the increased sequence number, and then choose to send the packet data on an appropriate channel. The packet data may be new packet data or retransmitted packet data.

The receiving of the packet data with an increased sequence number by the receiving end means that: the receiving end performs a CRC check on the received packet data,

If it is received correctly, send an ACK signal to the transmitting end, and perform receiving buffer processing on the received packet data;

If it is received incorrectly, a NACK signal is sent to the transmitting end, and the transmitting end is requested to retransmit the data. The receiving of the packet data with an increased sequence number by the receiving end means that: the receiving end performs a CRC check on the received packet data,

If it is received correctly, send an ACK signal to the transmitting end, and perform receiving buffer processing on the received packet data, and then perform sequence number removal processing on the buffered packet data; if it is not received correctly, send a NACK signal to the transmitting end. And request the transmitting end to retransmit the data.

In the method, the steps include:

The transmitting end performs FIFO buffering on the packet data to be transmitted;

Add a sequence number to the buffered packet data;

Perform grouping processing on the grouped data with increased serial numbers;

Choose to send packet data on an appropriate channel among different channels, and the packet data may be new packet data or may be retransmitted packet data;

The receiving end performs a CRC check on the received packet data;

The dual channels can be set as odd channels and even channels, where:

The adding of the sequence number to the packet data to be transmitted by the transmitting end means that the transmitting end first performs a FIFO buffer on the packet data to be transmitted, and then adds a sequence number to the buffered packet data.

The dual channels can be set as odd channels and even channels, where:

The transmitting end determines that the data sent by the transmitting end according to the correlation between the sequence numbers of the packet data to be transmitted on each single channel of the different channels refers to: The transmitting end performs packet processing on the packet data with the increased serial number, and then selects Packet data is transmitted on an odd channel or an even channel, and the packet data may be new packet data or may be retransmitted packet data.

The dual channels can be set as odd channels and even channels, where: The receiving of the packet data with an increased sequence number by the receiving end means that the receiving end performs an odd channel CRC check on the received packet data transmitted from the odd channel, and performs the received packet data transmitted from the even channel. Even channel CRC check;

If it is received incorrectly, it sends a NACK signal to the transmitting end and requests the transmitting end to retransmit the data.

The dual channels can be set as odd channels and even channels, where:

The receiving of the packet data with an increased sequence number by the receiving end means that the receiving end performs an odd channel CRC check on the received packet data transmitted from the odd channel, and performs the received packet data transmitted from the even channel. Even channel CRC check;

The Chinese channel method includes the following steps:

The dual channel can be set as an odd channel and an even channel, and the transmitting end performs FIFO buffering on the packet data to be transmitted;

Add a sequence number to the buffered packet data;

Perform grouping processing on the grouped data with increased serial numbers;

Choose to send packet data on odd or even channels, the packet data may be new packet data or may be retransmitted packet data;

The receiving end performs odd channel CRC check on the received packet data from the odd channel, and performs even channel CRC check on the received packet data from the even channel;

If it is received correctly, send an ACK signal to the transmitting end, and perform receiving buffer processing on the received packet data, and then perform sequence number removal processing on the buffered packet data; If it is received incorrectly, a NACK signal is sent to the transmitting end, and the transmitting end is requested to retransmit the data.

The method further includes: when the transmitting end adds a sequence number to the packet data to be transmitted, if the sequence number obtained by the new packet data and the sequence number of the packet data that needs to be retransmitted have not been correctly received, At the same time, the sending of new packet data should be stopped, and only the packet data that has not been received correctly should be retransmitted. Until the packet data is received correctly, that is, when the transmitting terminal receives the ACK signal of the packet data, it will continue to perform parallel processing. Sending of data.

The method can be applied to a TDD communication system.

The present invention also provides an ARQ error control device for automatically resending requests for different channels, which at least includes an ordering device;

The transmitting end adds a sequence number to the packet data to be transmitted through the ordering device, and determines the data sent by the transmitting end according to the correlation between the sequence numbers of the packet data to be transmitted on each single channel of different channels, and the receiving end adds a sequence No. of packet data is received.

The device is characterized in that it further comprises a FIFO buffer device;

The transmitting end performs FIFO buffering on the packet data to be transmitted through the FIFO buffer device, and then adds a sequence number to the buffered packet data through the adding device.

The device is characterized in that it further comprises a packetizer, and the transmitting end uses the packetizer to perform packet processing on the packet data to which the sequence number is increased, and then selects to send the packet data on an appropriate channel. The packet data may be new The packet data may be retransmitted packet data.

The device is characterized in that it further comprises a FIFO buffering device and a packetizer. The transmitting end performs FIFO buffering on the packet data to be transmitted through the FIFO buffering device, and then adds a sequence number to the buffered packet data through an adding device, and The packet data to which the sequence number is added is packetized by a packetizer, and then the packet data is selected to be transmitted on an appropriate channel. The packet data may be new packet data or retransmitted packet data.

The device is characterized in that it further comprises a CRC checker and a receiving buffer, and the receiving end performs a CRC check on the received packet data through the CRC checker. If it is received correctly, sending an ACK signal to the transmitting end, and performing receiving buffer processing on the received packet data through a receiving buffer;

The device is characterized in that it further comprises a CRC checker, a receiving buffer and a desequencing device, and the receiving end performs a CRC check on the received packet data through the CRC checker,

If it is received correctly, send an ACK signal to the transmitting end, and perform receiving buffer processing on the received packet data through the receiving buffer, and then perform the sequence number removal processing on the buffered packet data through the desequencing device;

The device, wherein:

The transmitting end may include a FIFO buffer device, an ordering device, and a packetizer;

The receiving end may include a CRC checker, a receiving buffer, and a desequencing device;

The transmitting end performs FIFO buffering on the packet data to be transmitted through the FIFO buffer device, and then adds a sequence number to the buffered packet data through an ordering device, and performs packet processing on the packet data with the sequence number added by a packetizer, and then selects the appropriate Sending packet data on the channel of the packet, the packet data may be new packet data or may be retransmitted packet data;

The receiving end performs a CRC check on the received packet data through a CRC checker. If it is received correctly, it sends an ACK signal to the transmitting end, and performs receiving buffer processing on the received packet data through the receiving buffer. The buffered packet data is processed to remove the sequence number; if it is not received correctly, a NACK signal is sent to the transmitting end, and the transmitting end is requested to retransmit the data.

The device is characterized in that the different channels may be constituted by dual channels, wherein: the dual channels may be set as odd channels and even channels, and a transmitting end may include a FIFO buffer device, an ordering device, a packetizer, Odd channel transmitter and even channel transmitter; The receiving end may include an odd channel receiver, an even channel receiver, a receiving buffer, and a desequencing device; the transmitting end performs FIFO buffering of the packet data to be transmitted through the FIFO buffer device, and then adds a sequence to the buffered packet data through the adding device The packet data of which the sequence number is increased is processed by a packetizer, and then the packet data is selected to be transmitted on an odd channel or an even channel, and the packet data may be new packet data or retransmitted packet data;

The receiving end performs odd channel CRC check on the packet data transmitted from the odd channel through the odd channel receiver, and performs even channel CRC check on the packet data transmitted from the even channel through the even channel receiver; if it is received correctly, it sends The ACK signal is sent to the transmitting end, and the receiving buffer performs receiving buffer processing on the received packet data, and then performs a sequence number removal process on the buffered packet data through a desequencing device; if it is not received correctly, a NACK signal is sent to the transmitting end. And request the transmitting end to retransmit the data.

The device is characterized in that the different channels may be multi-channel.

The device is characterized in that the device is applicable to a TDD communication system. The error control method applicable to high-speed wireless packet data services disclosed in the present invention is based on DSW ARQ, and the method is particularly suitable for error control of a Time Division Duplex (TDD) communication system. When the present invention is applied to a wireless communication system for high-speed packet data services, the utilization rate of channel resources is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a sequence diagram of a stop-wait ARQ method for transmitting data packets in the prior art;

FIG. 2 is a structural block diagram of implementing the present invention;

3 and 4 are timing diagrams for implementing the present invention. detailed description

For convenience of explanation, the timing in the prior art is analyzed here first. FIG. 1 shows an exemplary timing diagram of data packet transmission using a conventional stop-equation ARQ method. As shown in the figure, transmission from a transmitting end to a receiving end A series of data groupings are used. However, in reality, no number is assigned to the data packet. If the data packet is received correctly, the receiver sends an ACK to the sender, and the sender sends the next data packet after receiving the ACK. If the data packet is not successfully received, the receiving end transmits AK to the transmitting end, and the transmitting end resends the data packet. For example, according to the NAK received from the receiving end, during the next transmission, the third data packet incorrectly transmitted indicated by the number 3 in FIG. 1 is retransmitted from the transmitting end. Assuming that there is no error in the acknowledgement information returned, only the data packets that failed during transmission are retransmitted. If the sender does not receive the ACK or NAK of the receiver within the expected time, then the sender retransmits this unresponded data Grouping. For example, because the receiving end does not receive the fourth data packet represented by the number 4 sent by the sending end, the sending end has never received the ACK or NAK of the fourth data packet. After the pause period, the sending end Resend the fourth data packet.

After analyzing the timing of the prior art, we can see that FIG. 2 shows a block diagram of a structure for implementing the present invention. At the transmitting end, the packet data to be transmitted is first input into a "first in, first out" (FIFO) buffer device 201, and the packet data is buffered and queued in the buffer device 201, and then enters an added sequence number 202. The management of the sequence number will be described in detail in Figs. 3 and 4. The packet data after adding the sequence number is processed in the packetizer 203 to select whether to send new packet data on the odd channel or even channel or send retransmission. For packet data, the selected packet data is sent to the odd channel transmitter 204, and then sent to the receiving end through the odd channel 206, or sent to the even channel transmitter 205, and sent to the receiving end through the even channel 207. Taking the packet data sent on the odd channel as an example, after the sent packet data is sent through the odd channel 206, the odd channel receiver corresponding to the receiving end 208 receives the data, and then completes the CRC check by the odd channel CRC check device. Receiving, sending an ACK (ACKnowledgment) signal to the sending end, and sending NACK if receiving is incorrect

(Non-ACKnowledgment), requiring the transmitting end to retransmit the data; similarly, if the packet data is sent via the even channel 207, it is received at the receiving end through the even channel receiver 209, and the CRC check is completed at the even channel CRC checking device If it is received correctly, send ACK

(ACKnowledgment) signal to the sending end, if the reception is not correct, send a NACK (Non-ACKnowledgment), requesting the sending end to retransmit the data. Device for checking odd channel CRC or warping. The packet data correctly received by the even-channel CRC check device is processed in the receiving buffer 210, and the processing process is described in detail in FIG. 3 and FIG.

Figures 3 and 4 show timing diagrams for implementing the present invention. The first-in-first-out buffer 201 in FIG. 1 outputs data packets. The data packet has a serial number added to the serial number 202. For the convenience of explanation here, it is assumed that the capacity of four (4) data packet units in the receiving buffer is 1.

2, 3, 4 to indicate. Four (4) sequence numbers are required to distinguish the data packets on the sending end. Adding sequence number 202 repeatedly adds sequence numbers to data packets in the order of 1, 2, 3, 4, ie, adding sequence numbers to data packets in the order of 1, 2, 3, 4, 1, 2, 3, 4, ... . If the sequence number obtained by the new data packet is the same as the sequence number of the data packet that has not been received correctly and needs to be retransmitted, stop sending the new data packet and retransmit only the data packet that has not been received correctly until After the data packet is received correctly, the sending end receives an ACK (nownowledgment) signal of the data packet, and continues to send data in parallel.

As shown in FIG. 3, at the transmitting end, the first round of data packets are sent in parallel. Data packet 1 is transmitted on the odd channel transmitter 204, passes through the odd channel 206, and is received by the receiving side odd channel receiver 208. The odd channel CRC check For correct reception, the data packet 1 is stored in position 1 of the receiving buffer 210, and an ACK (nownowledgment) signal is transmitted to the transmitting end via the odd channel 206; the data packet 2 is transmitted on the even channel transmitter 205, The channel 207 is received by the even channel receiver 209 at the receiving end, and is received correctly by the even channel CRC check device, then the data packet 2 is stored in the 2 position of the receiving buffer 210, and an ACK (ACKnowledgment) is transmitted through the even channel 207 Signal to the sender. The frontmost position of the receiving buffer 210 is 1. Therefore, the data packet 1 is sent to the de-sequence number 211 to remove the sequence number, and then output; At the same time, the position of the receiving buffer 210, position 2, position 3, and position 4 are moved forward in a loop. One bit; the foremost position becomes 2, followed by position 3, position 4, and position 1. Data packet 2 is in position 1 of the receiving buffer 210, so data packet 2 is sent to the serial number 211 to remove the serial number, and then output; at the same time, the position of the receiving buffer 210 is rotated forward by one position; for

3, followed by position 4, position 1, position 2; As shown in FIG. 3, in the second round of parallel data transmission, since data packet 1 and data packet 2 have been correctly received, data packet 3 and data packet 4 are sent at odd channel transmitter 204 and even channel transmitter 205, respectively. Because the data packet 3 is received incorrectly, the receiving end sends a NAK (Non-ACKnowledgment) signal of the data packet 3 to the transmitting end; the incorrect data is discarded; the data packet 4 is received correctly and stored in the position 4 of the receiving buffer 210, and Send an ACK (ACKnowledgment) signal of the data packet 4 to the transmitting end; position 3 at the forefront of the receiving buffer 210 is empty, so each position of the receiving buffer 210 is unchanged.

As shown in FIG. 3, in the third round of parallel data transmission, data packet 3 is retransmitted on the odd channel; data packet 1 is transmitted on the even channel. Both data packet 3 and data packet 1 are received correctly, and are stored in position 3 and position 1 of the receiving buffer 210 respectively. At this time, the front end of the receiving buffer 21Q is position 3, so data packet 3, data packet 4, data packet 1 is sequentially sent to the de-sequence number 211 to remove the sequence number, and then output; and simultaneously sends an ACK (ACKnowledgment) signal of data packet 3 and data packet 1 to the sending end. Continue to the next round of parallel data transmission.

As shown in FIG. 4, in the fifth round of parallel data transmission, since the packet data 3 on the odd channel is not correctly received during the second, third, and fourth rounds of parallel data transmission; and the packet data 4 on the even channel, The packet data 1 and the packet data 2 have been received correctly and are stored in the corresponding positions of the receiving buffer 210. At this time, the packet data 3 on the odd channel should be retransmitted; the sequence number obtained by the data packet on the even channel is 3, so the data transmission on the even channel should be suspended and only the data packet 3 on the odd channel should be sent until the odd channel. After receiving the correct data packet 3, the next round of parallel data transmission is continued.

The error control method and device suitable for high-speed wireless packet data services disclosed in the present invention are based on DSW (Dual Channel Stop-and-Wait) ARQ, and the method and device are particularly suitable for time division duplex TDD (Time Division) Duplex) error control of communication systems. When the present invention is applied to a wireless communication system for high-speed packet data services, the utilization rate of channel resources is greatly improved.

The above specific implementations are only used to illustrate the present invention and not intended to limit the present invention.

Claims

Rights request

1. An ARQ error control method for automatic retransmission requests for different channels, comprising: a transmitting end adding a sequence number to packet data to be transmitted;

The transmitting end determines the data sent by the transmitting end according to the correlation between the sequence numbers of the packet data to be transmitted on each single channel of the different channels;

Stop-equation ARQ error control on different channels is independent of each other and sends packet data in parallel.

2. The method according to claim 1, wherein the different channels include at least two channels, and the transmitting end determines the transmitting end according to the correlation between the sequence numbers of the packet data to be transmitted on each single channel of the two channels. The data;

Stop-equation ARQ error control on two channels is independent of each other and sends packet data in parallel.

3. The method according to claim 1, wherein the different channels are multi-channel, and the transmitting end determines the transmitting end to send according to the correlation between the sequence numbers of the packet data to be transmitted on each single channel of the multi-channel. The data;

Stop-equation ARQ error control on multiple channels is independent of each other and sends packet data in parallel.

4. The method according to claim 1, characterized in that: the transmitting end adding a sequence number to the packet data to be sent means: the transmitting end first performs a FIFO buffer on the packet data to be sent, and then buffers the packet after it is buffered. Data is incremented by a serial number.

5. The method according to claim 1, wherein the transmitting end determines that the data sent by the transmitting end according to the correlation between the sequence numbers of the packet data to be transmitted on each single channel of different channels refers to: the transmitting end Perform packet processing on the packet data to which the sequence number is added, and then choose to send the packet data on an appropriate channel. The packet data may be new packet data or retransmitted packet data.

6. The method according to claim 1, wherein the transmitting end determines the transmitting end according to a correlation between sequence numbers of packet data to be transmitted on each single channel of different channels. The data sent refers to: the transmitting end performs FIFO buffering on the packet data to be sent, adds a sequence number to the buffered packet data, performs packet processing on the packet data with the increased sequence number, and then chooses to send the packet data on an appropriate channel. The packet data may be new packet data or may be retransmitted packet data.

7. The method according to claim 1, wherein the receiving end receiving the packet data with an increased sequence number means: the receiving end performs a CRC check on the received packet data,

8. The method according to claim 1, wherein: the receiving end receiving the packet data with an increased sequence number means: the receiving end performs a CRC check on the received packet data,

9. The method according to claim 1, comprising the steps of:

Add a sequence number to the buffered packet data;

Perform grouping processing on the grouped data with increased serial numbers;

The receiving end performs a CRC check on the received packet data;

If it is received correctly, send an ACK signal to the transmitting end, and perform the processing on the received packet data. Receive buffer processing, and then perform sequence number removal processing on the buffered packet data; if it is not received correctly, send an MCK signal to the transmitting end, and request the transmitting end to retransmit the data.

10. The method according to claim 2, wherein the dual channel can be set to an odd channel and an even channel, wherein:

The increasing sequence number of the packet data to be transmitted at the transmitting end refers to: the transmitting end first performs a FIFO buffer on the packet data to be transmitted, and then adds a sequence number to the buffered packet data.

11. The method according to claim 2, wherein the dual channel can be set as an odd channel and an even channel, wherein:

12. The method according to claim 2, wherein the dual channel can be set as an odd channel and an even channel, wherein:

13. The method according to claim 2, wherein the silent channel can be set to an odd channel and an even channel, wherein:

The receiving of the packet data with an increased sequence number by the receiving end means that: the receiving end performs odd channel CRC check on the received packet data transmitted from the odd channel, and transmits the received data from the even channel. The incoming packet data is subjected to an even channel CRC check;

14. The method according to claim 2, comprising the steps of:

Add a sequence number to the buffered packet data;

Perform grouping processing on the grouped data with increased serial numbers;

15. The method according to any one of claims 1 to 14, further comprising: when the transmitting end adds a sequence number to the packet data to be transmitted, if the sequence number obtained by the new packet data and the sequence number have not been received correctly When the sequence number of the packet data to be retransmitted is the same, the transmission of new packet data should be stopped, and only the packet data that has not been received correctly should be retransmitted until the packet data is received correctly, that is, the transmitting end receives the packet data. When the ACK signal of the packet data, the parallel data transmission is continued.

16. The method according to any one of claims 1 to 14, further comprising: the method is applicable to a TDD communication system.

17. An ARQ error control device for automatic retransmission requests for different channels, including at least an ordering device;

18. The device according to claim 17, further comprising a FIFO buffer device;

19. The device according to claim 17, further comprising a packetizer, and the transmitting end performs packet processing on the packet data to which the sequence number is increased, and then selects to send the packet data on an appropriate channel, The packet data may be new packet data or may be retransmitted packet data.

20. The device according to claim 17, further comprising a FIFO buffering device and a packetizer, and the transmitting end performs FIFO buffering on the packet data to be transmitted through the FIFO buffering device, and then uses the adding device to buffer the packet after being buffered. The data is added with a sequence number, and the packetized data with the increased sequence number is packetized by a packetizer, and then the packet data is selected to be transmitted on an appropriate channel. The packet data may be new packet data or retransmitted packet data.

The device according to claim 17, further comprising a CRC checker and a receiving buffer, and the receiving end performs CRC check on the received packet data through the CRC checker,

If it is received correctly, send an ACK signal to the transmitting end, and perform receiving buffer processing on the received packet data through the receiving buffer;

22. The apparatus according to claim 17, further comprising a CRC check Device, receiving buffer and desequencing device, the receiving end performs a CRC check on the received packet data through a CRC checker,

23. The apparatus according to claim 17, wherein:

The transmitting end performs FIFO buffering on the packet data to be transmitted through the FIFO buffer device, and then adds a sequence number to the buffered packet data through an adding device, and performs packet processing on the packet data with the sequence number added through a packetizer, and then selects the Sending packet data on the channel of the packet, the packet data may be new packet data or may be retransmitted packet data;

24. The device according to claim 17, wherein the different channels can be composed of channels, wherein: the Chinese channels can be set as odd channels and even channels, and the transmitting end can include a FIFO buffer device, Sequence devices, packetizers, odd channel transmitters, and even channel transmitters; the receiving end may include odd channel receivers, even channel receivers, receive buffers, and desequencing devices; the transmitting end performs packet data to be transmitted through the FIFO buffer device. FIFO buffer, and then add the sequence number to the buffered packet data through an ordering device, and perform packet processing on the packet data with the increased sequence number through a packetizer, and then select the number of packets to send on the odd channel or even channel. According to the data, the packet data may be new packet data or retransmitted packet data; the receiving end performs odd channel CRC check on the packet data transmitted from the odd channel through the odd channel receiver, and The packet data transmitted from the even channel is subjected to an even channel CRC check; if it is received correctly, an ACK signal is sent to the transmitting end, and the receiving buffer performs the receiving buffer processing on the received packet data, and then the buffered packets are processed by the desequencing device. The data is processed to remove the sequence number; if it is not received correctly, a NACK signal is sent to the transmitting end, and the transmitting end is requested to retransmit the data.

25. The apparatus according to claim 17, wherein the different channels are multi-channels.

The device according to any one of claims 17 to 25, wherein the device is applicable to a TDD communication system.