CN1555629A - N-channel ARQ error control method and device for high-speed wireless packet data service - Google Patents

Abstract

The invention discloses an error control method suitable for high-speed wireless packet data service, which is characterized in that: the N-channel control method is adopted for the transmitted packet data, and the error control of the transmitted packet data is completed through a waiting flag bit and a transmitted packet counter which are arranged on the N-channel. The invention also discloses an error control device applied to the high-speed wireless packet data service, which is characterized in that: the N-channel time sequence arrangement in the ARQ method is realized by setting a waiting flag bit and a transmission packet counter in each of the N-channels in the N-channel controller, and the error control of the transmission packet data is completed. The method of the invention improves the utilization rate of the channel, thereby improving the effectiveness of the whole communication system; meanwhile, the method is convenient for scheduling and fault diagnosis, and reduces the complexity and time delay of the system.

Description

A high-speed wireless packet data service

N channel ARQ error control method and device Technical field

The present invention relates to the field of telecommunication technology, in particular to an error control method and device for high-speed wireless packet data services. Background technique

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, higher and higher requirements are put forward for the reliability of data transmission, making it an urgent problem to be solved in the field of communication.

Compared with the 2nd generation mobile communication system, the 3rd generation mobile communication system needs 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, efficient and reliable communication mechanisms must be used. For this reason, the high-dimensional modulation method is applied to the 3G (third generation mobile communication) system, thereby increasing the peak rate of the system. However, the resulting problem is that the reliability of the system is seriously challenged. Because on the wireless channel, multipath, shadowing, Doppler frequency shift, etc. will seriously deteriorate the performance of the high-dimensional system, and random errors and burst errors coexist. The rate is less than 1 ( ^Γ6 . Therefore, in the 3G system, it is recommended to use HARQ (Hybrid Automatic Repeat reQuest) as the link error control technology to ensure reliable transmission of packet data.

Window based Selective Repeat (SR) is a general ARQ technology adopted by many systems, it only resends packets received in error, and is not very sensitive to delay. But it must use the sequence number to identify each packet, which increases the overhead of the frame header. SR makes full use of channel resources. However, it requires high memory requirements for the receiving end, and requires the receiving end to ensure reliable confirmation of the sequence number of the sent packet. Stop-and-wait is the simplest ARQ technology, which requires the least overhead, has low complexity at the receiving end, and requires a small amount of storage. But its biggest disadvantage is that the acknowledgment signal is not timely, so when the sender sends a packet, it must wait for the acknowledgment signal of this packet instead of sending the next packet, which greatly wastes channel resources and low channel utilization. N channel l s top-and-wait ARQ ( DSW ) technology absorbs the Stop top- Advantages of both and-wait ARQ and SR ARQ. However, the N channel ARQ method in the prior art mentioned above does not solve how to quickly and efficiently maintain the timing of sending packet data in a high-speed mobile environment, which is the key to the successful implementation of the ARQ technology.

Contents of the invention

The object of the present invention is to provide an error control method and device for high-speed wireless packet data services. It proposes a new ARQ method, which adopts N-channel control for the transmitted packet data. The error control of the sent packet data is completed through the waiting flag bit set on the N channel and the sent packet counter. At the same time, the timing arrangement of N channels in the ARQ method is realized. The error control method of the present invention can also be applied in a wireless communication system for high-speed packet data services to realize the timing arrangement of N channels in the ARQ technology and improve the utilization rate of channel resources. The implementation of the present invention can achieve the goals of high channel utilization, facilitate scheduling and fault diagnosis, reduce system complexity and delay, and thus improve the effectiveness of the entire communication system.

Technical scheme of the present invention is:

An N-channel ARQ error control method for high-speed wireless packet data services, wherein: the transmitting end uses N-channel control on the transmitted packet data, and processes the packet data to be transmitted according to the signal fed back by the receiving end, so that the transmitted Packet data meets the timing arrangement of N channels;

The receiver performs N-channel control on the received signal, checks the received packet data, and feeds back the signal to the transmitter.

The said transmitting end adopts N-channel control for the sent packet data means that: the transmitting end counts the retransmission of the sent packet data.

The said transmitting end adopting N-channel control for the transmitted packet data refers to: setting a waiting flag bit on the N channel, and the waiting flag bit can identify the packet data sending status of each single channel of the N channel.

The use of N-channel control by the transmitting end for the transmitted packet data refers to: using a packet counter on the N-channel to count the packet data of each single channel of the N-channel.

The use of N-channel control by the transmitting end for the transmitted packet data refers to: timing the packet data of each single channel of the N-channels.

The said transmitting terminal adopts N channel control for the transmitted data refers to: the transmitting terminal performs retransmission counting for each single channel data of the N channel; and sets the waiting flag bit on the N channel, the The waiting flag bit can identify the data transmission status of the "monochannel" of the N channels.

The transmitting end adopts N channel control for the sent packet data means: the transmitting end controls the N channel Retransmission counting is performed on the packet data of each single channel of the channel; and packet counting is performed on the packet data of each single channel of the N channels by using a packet counter on the N channel.

The said transmitting terminal adopts N-channel control for the packet data sent refers to: setting a waiting flag bit on the N channel, and the waiting flag bit can identify the packet data sending status of each single channel of the N channel; and A packet counter is used on the channel to count the packet data of each single channel of the N channels.

The said transmitting terminal adopts N-channel control for the transmitted packet data refers to: the transmitting terminal carries out retransmission counting on the packet data of each single channel of the N channel; and sets the waiting flag on the N channel, and the waiting flag can be Identify the packet data transmission status of each single channel of the N channels; and use a packet counter on the N channel to count the packet data of each single channel of the N channels; and count each of the N channels The packet data of a single channel is timed; the receiving end checks the received packet data, and feeds back a signal to the transmitting end means: the receiving end performs CRC face-checking on the received packet data, repeats detection, and sends a response frame, And cache the received packet data.

The method, the steps of which include:

When the transmitter starts to send the packet data, it initializes the waiting flag and the packet counter set on the N channel;

Initialize the retransmission counter set on the N channel, and set the maximum number of retransmissions; Initialize the channel timer set on the N channel, and set the timer length; When the receiving end correctly receives a packet on the N channel When receiving data, the AC signal is fed back to the corresponding channel of the transmitter;

The transmitter selects according to the feedback ACK signal: Send new packet data or set the waiting flag position to 1;

When the receiving end does not correctly receive a packet of data on the N channel, the NACK signal is fed back to the corresponding channel of the transmitting end;

The transmitting end selects according to the fed back NACK signal, the maximum number of retransmissions, and the length of the channel timer: resend the original packet or send new packet data, or set the waiting flag to 1.

Described method, its step further comprises:

At the transmitting end: when starting to send packet data, initialize the waiting flag and packet counter set on the N channel;

Initialize the retransmission counter set on the N channel, and set the maximum number of retransmissions; Initialize the channel timer set on the N channel, and set the timer length; when the transmitter sends a packet first, start the channel timer, and when the timer expires, judge whether the retransmission counter of the channel is greater than the channel The maximum number of retransmissions, if it is, it is judged whether to send a new packet, if not, the original packet is resent on the channel;

If the response frame received by the transmitter in (410) is an ACK signal, judge whether to send a new packet, enter (413), delete the old data and prepare to send new data; if it is a NACK signal, enter (412), and judge Whether the retransmission counter of the channel is greater than the maximum number of retransmissions of the channel, if yes, then judge whether to send a new packet, then enter (413), delete the old data and prepare to send new data, if not, resend on the channel original packet (414);

At the receiving end: When the receiving end receives a packet (401) on a channel, it first enters

(402) perform CRC check, if it is received correctly, send an ACK signal to the transmitter (404) on the channel, and send a NACK signal to the transmitter (403) on the channel if it is not correct; add in front of the packet The new and old flag bits are used by the receiving end to distinguish whether a correctly received packet is a new packet or an old packet on a channel.

The method, the steps of which may also include:

On the transmitter side: buffer the input data ( 101 );

Initialize, that is: the waiting flag position of each channel of N channels can be set to 0, the sending packet counter of each channel of N channels can be set to 0, the retransmission counter of each channel of N channels can be set to 0; set according to system requirements Determine the maximum number of retransmissions of each channel retransmission counter on the N channel; determine the number of each channel timer on the N channel according to the average time from sending a packet to receiving the response frame on the channel plus a delay length;

The N channel can be set as channel 1, channel 2, channel N-1, channel N;

( 102 ), sequentially fire on channel 1, channel 2, channel N-1, and channel N;

Make the following assumptions:

Both m and n are positive integers, and m MOD n (m modulo n) is the remainder obtained by dividing m by n.

When the transmitter sends a packet, it starts to start the channel timer. If the channel timer is already running, it will be cleared and timed again;

When the timer expires and there is no response frame NACK or AO from the receiving end, it is judged whether the retransmission counter of the channel is equal to the maximum number of retransmissions of the channel, if yes, it is judged whether to send a new packet or set the channel waiting flag to 1, If not, resend the original packet on the channel;

When the timer on a channel of the transmitter has not expired and a response frame is received, if For the NACK signal, it is judged whether the retransmission counter of the channel packet is equal to the maximum number of retransmissions of the channel, if yes, further processing is performed, and if not, the original packet is retransmitted on the channel;

When the timer on a channel of the transmitting end has not expired and a response frame is received, if it is an ACK signal, it is judged whether to transmit a new packet or set the channel waiting flag to 1;

When the original packet is retransmitted on a channel, the channel timer is started, the retransmission counter of this packet is increased by 1, and the packet counter of this channel remains unchanged;

When a new packet is transmitted on a channel, the channel waiting flag bit of the channel is 0, the retransmission counter is 1, and the packet counter of the channel is incremented by 1;

When a packet is sent once, the retransmission counter of the packet is 1, and every time it is retransmitted, the retransmission counter of the packet is accumulated by 1; when the retransmission counter of the packet exceeds the maximum number of retransmissions of the channel, the packet is discarded abandon;

When the timer on the channel i (i is a positive integer not greater than N) of the transmitting end has not timed out and a response frame is received and it is an ACK signal, if the channel is channel 1, that is, i is equal to 1, the channel 1 is judged Whether the packet counter is equal to the packet counter of channel N plus 1, if yes, set the waiting flag bit of channel 1 to 1; if the packet counter of channel 1 is equal to the packet counter of channel N, transmit a new packet on channel 1, And sequentially judge channel 2, channel 3, ..., channel N-1, the waiting flag on channel N, if the waiting flag on channel 2 is 0, end judging the waiting flag on channel 3 to channel N, If the waiting flag bits on channel 2 to channel i (i<=N) are all 1, then transmit new packets on channel 2, channel 3, ..., channel i in sequence; if the packet counter of channel 1 is equal to The packet counter of channel N plus 2 or the packet counter of channel 1 is equal to the packet counter of channel N minus 1, then perform fault diagnosis and end the ARQ process; if the channel is not channel 1, that is, i is not equal to 1, then judge the channel i Whether the packet counter is equal to the packet counter on channel i-1, if yes, set the waiting flag on channel i to 1; if the packet counter on channel i is equal to the packet counter on channel i-1 minus 1, then on channel i Send a new packet on , and judge the channel ( ( i+1 ) MOD N ), channel ( ( i+2 ) MOD N ), ..., channel ( (i+j ) MOD N ) in sequence (j is less than N positive integer), ..., the waiting flag on the channel i- 1, if the waiting flag on the channel ((i+1) MOD N ) is 0, end judging the waiting flags on other channels, if the channel (( i +1 ) MOD N ), channel ( (i+2 ) MOD N ), ..., channel ( ( i+j- 1 ) MOD N ) (j is a positive integer less than N), the waiting flag bits are all 1 and Channel (( i+j ) MOD N ) (j is small If the waiting flag on the positive integer of N) is 0, then in the channel ((i+1) MOD N) , channel ((i+2) MOD Ν) , ·.·, channel ((i+j- 1) Send a new packet on MOD N) (j is a positive integer less than N), if channel ( ( i+1 ) MOD N) , channel ( ( i+2 ) MOD N ) , ..., channel ( ( i+ j ) MOD N) (j is a positive integer less than N), ..., the waiting flag bits on the channel i-1 are all 1, then in turn in the channel ( (i+1)

MOD N), channel ( (i+2) MOD N), ..., channel ( (i+j) MOD N) (j is a positive integer less than N), ..., send a new packet on channel i-1 ; If the packet counter of channel i is equal to the packet counter on channel i-1 plus 1 or the packet counter of channel i is equal to the packet counter on channel i-1 minus 2, perform fault diagnosis and end the ARQ process; (i is a positive integer not greater than N), when the timer on the channel has not expired and a response frame is received, if it is a NACK signal, it is judged whether the retransmission counter of the channel i packet is less than the maximum number of retransmissions of the channel, and if so, the If the old packet is retransmitted on channel i, the retransmission counter of the packet is incremented by 1; if the retransmission counter of the channel i packet is equal to the maximum number of retransmissions of the channel, the packet is discarded; if the channel is channel 1, that is, i is equal to 1, then Determine whether the packet counter of channel 1 is equal to the packet counter of channel N plus 1, if yes, set the waiting flag bit of channel 1 to 1; if the packet counter of channel 1 is equal to the packet counter of channel N, transmit a New grouping, and sequentially judge channel 2, channel 3, channel N-1, the waiting flag on channel N, if the waiting flag on channel 2 is 0, end judging the waiting flag on channel 3 to channel N, If the waiting flag bits on channel 2 to channel i (i<=N) are all 1, then transmit new packets on channel 2, channel 3, ..., channel i in turn; if the packet counter of channel 1 is equal to The packet counter of channel N plus 2 or the packet counter of channel 1 is equal to the packet counter of channel N minus 1, then perform fault diagnosis and end the ARQ process; if the channel is not channel 1, that is, i is not equal to 1, then judge the channel i Whether the packet counter is equal to the packet counter on channel i-1, if yes, set the waiting flag on channel i to 1; if the packet counter on channel i is equal to the packet counter on channel i-1 minus 1, then on channel i Send a new packet on , and judge the channel ( ( i+1 ) MOD N) , channel ( ( i+2 ) MOD N), ..., channel ( (i+j) MOD N) (j is less than N) in turn Positive integer), the waiting flag on channel i- 1, if the waiting flag on channel ((i+1) MOD N) is 0, finish judging the waiting flag on other channels, if channel ((i+1) ) MOD N ), channel ( ( i+2 ) MOD N) , ..., channel ( (i+j-1) MOD N) (j is a positive integer less than N), the waiting flag bits are all 1 and The waiting flag on the channel ((i+j) MOD N) (j is a positive integer less than N) is 0, then in the order of channel ( ( i+1 ) MOD N) , channel ( ( i+2 ) MOD N) , ..., channel ( ( i+j-1 ) MOD N) (j is a positive integer less than N) Send a new packet on, if channel ( ( i+1 ) MOD ), channel ( ( i+2 ) MOD N ), ..., channel ( ( i+j ) MOD ) (j is a positive integer less than N), . .., the waiting flag bits on the channel i-1 are all 1, then in turn in the signal it ( ( i+1 ) MOD N), channel ( ( i+2 ) MOD N ), ..., channel ( ( i+j ) MOD N) (j is a positive integer less than N), ..., a new packet is sent on channel i-1; if the packet counter of channel i is equal to the packet counter on channel i-1 plus 1 or the packet of channel i The counter is equal to the packet counter on the channel i-1 minus 2, then perform fault diagnosis and end the ARQ process;

When the transmitting end first sends a packet on channel i (i is a positive integer not greater than N), it starts to start the channel timer, and when the timer expires and no response frame NACK or ACK is received from the receiving end, it judges the channel i packet Whether the retransmission counter is less than the maximum retransmission times of the channel, if so, retransmit the original packet on the channel i; if the retransmission counter of the channel i packet is equal to the maximum retransmission times of the channel, discard the packet, if the channel i is channel 1, that is, i is equal to 1, judge whether the packet counter of channel 1 is equal to the packet counter of channel N plus 1, if yes, set the waiting flag bit of channel 1 to 1; if the packet counter of channel 1 is equal to that of channel N Packet counter, then transmit a new packet on channel 1, and judge the waiting flag on channel 2, channel 3, channel N-1, and channel N in turn, if the waiting flag on channel 2 is 0, end the judgment of the channel 3 to the waiting flag on the channel N, if the waiting flags on the channel 2 to the channel i (i<=N) are all 1, then transmit new ones on the channel 2, channel 3, ..., channel i in sequence If the packet counter of channel 1 is equal to the packet counter of channel N plus 2 or the packet counter of channel 1 is equal to the packet counter of channel N minus 1, perform fault diagnosis and end the ARQ process; if the channel is not channel 1, that is i is not equal to 1, then judge whether the packet counter of channel i is equal to the packet counter of channel i-1, if yes, set the waiting flag bit of channel i to 1; if the packet counter of channel i is equal to the packet counter of channel i-1 If the packet counter of is decremented by 1, a new packet is sent on channel i, and the channel ( ( i+1 ) MOD N) , channel ( ( i+2 ) MOD N) , channel ( (i+j) MOD Ν) (j is a positive integer less than N), ..., the waiting flag on the channel i-1, if the waiting flag on the channel ((i+1) MOD N) is 0, end judging the waiting on other channels Flag bit, if channel ( ( i+1 ) MOD N) , channel ( ( i+2 ) MOD N ) , ..., channel ( (i+j-l) M0D N) (j is a positive integer less than N) on the wait The flag bits are all 1 and the waiting flag bit on the channel ((i+j) MOD N) (j is a positive integer less than N) is 0, then according to; channel ((i+l)MOD N), channel (( i+2) M0DN) , letter channel ( (i+j-1 ) MOD N ) (j is a positive integer less than N), if channel ( ( i+1 ) MOD N ), channel ( ( i+2 ) MOD N ) , .. , channel ( ( i+j ) MOD N ) (j is a positive integer less than N), ..., the waiting flag bits on channel i-1 are all 1, then sequentially in channel ( ( i+1 ) MOD N ), channel ( ( i+2 ) MOD N ), ..., channel ( ( i+j ) MOD N ) (j is a positive integer less than N), ..., send a new Grouping; If the packet counter of channel i is equal to the packet counter on channel i-1 plus 1 or the packet counter of channel i is equal to the packet counter on channel i-1 minus 2, then perform fault diagnosis and end the ARQ process;

The output of the packet data at the receiving end is strictly in accordance with the order of the transmitting end; that is, to output the packet data Z, only when the packet data before Z has correctly arrived at the receiving end and has been output;

If the packet data X transmitted after the transmitter reaches the receiver correctly before the packet data Y transmitted first by the transmitter, at this time, X must be placed in the buffer buffer of the receiver, and Y will be output sequentially after Y arrives at the receiver. X;

If the number of retransmissions at the transmitting end reaches the maximum number of times, and the receiving end has not received it correctly, the packet Y is discarded at the transmitting end; at this time, the packet X is output at the receiving end;

By adding a new and old flag in front of the packet, the receiving end is used to distinguish whether the correctly received packet is a new packet or an old packet on a channel;

The method is characterized in that the channel between the transmitting end and the receiving end can be time division, frequency division, code division, space division, etc.

The method is characterized in that the method is particularly suitable for TDD communication systems. The present invention also provides an N-channel ARQ error control device for high-speed wireless packet data services, which includes: an N-channel controller, a channel transmitter, and a channel receiver;

The output of the N channel controller is the input of the channel transmitter; the output of the channel transmitter is the input of the channel, and the output of the channel is the input of the channel receiver.

The N-channel controller includes at least a retransmission counter; the N-channel controller can set the retransmission counter to count the retransmissions of the packet data of the ^" single channel of the N-channel.

The N-channel controller includes at least a channel waiting flag; the N-channel controller can set the waiting flag to identify the data transmission status of the N-channel.

The N-channel controller includes at least a sum counter; the N-channel controller can set the sum counter, so as to count the sum data of the ^-monochannel of the N-channel.

Described N channel controller can comprise channel waiting flag bit and packet counter; Wherein:

The N-channel controller can set the waiting flag bit to identify each of the N-channels The packet data transmission status of a single channel;

The N-channel controller can set the packet counter to count the packet data of each single channel of the N-channels.

The N-channel controller may include a channel waiting flag bit, a packet counter, and a retransmission counter; wherein: the N-channel controller may set the waiting flag bit to identify a packet of each single channel of the N-channel Data transmission state; the N channel controller can set the packet counter to count the packet data of each single channel of the N channel; the N channel controller can set the retransmission counter for Retransmission counting is performed on the packet data of each single channel of the N channels.

The N-channel controller may include a channel waiting flag, a packet counter, a retransmission counter, and a channel timer; wherein: the N-channel controller may set the waiting flag to identify each of the N channels The packet data transmission status of a single channel; the N channel controller can set the packet counter to carry out packet counting to the packet data of each single channel of the N channels; the N channel controller can perform the retransmission counter set, to count the retransmission of packet data of each single channel of the N channels; the N channel controller can set the channel timer, to count the packet data of each single channel of the N channels Timing.

The channel transmitter may be composed of N channel transmitters.

The channel receiver may be composed of N channel receivers.

The device is characterized in that it also includes a CRC checker, and the channel receiver inputs the received signal into the CRC checker for checking.

The CRC checker may be composed of N CRC checkers.

The beneficial effects of the present invention are: providing an error control method and device for high-speed wireless packet data services. It proposes a new ARQ method, which adopts N-channel control for the transmitted packet data. Realized the timing arrangement of the ARQ method N channel. The error control method of the present invention can also be applied in a wireless communication system for high-speed packet data services, to realize the timing arrangement of N channels in the ARQ technology, and to improve the utilization rate of channel resources. The implementation of the present invention has good effects of high channel utilization, convenient scheduling and fault diagnosis, and reduced system complexity and delay, thereby improving the effectiveness of the entire communication system. Description of drawings

FIG. 1 shows a block diagram of ARQ implementation using the method of the present invention;

Fig. 2 has provided the timing diagram realizing the method of the present invention; FIG. 3 is a schematic diagram of the N-channel controller at the sending end and the N-channel controller at the receiving end of the present invention; FIG. 4 shows a working flow chart of implementing the method of the present invention at the sending end;

Fig. 5 shows the working flowchart of implementing the method of the present invention at the receiving end. Detailed ways

6信道Figure 1 shows a block diagram of an example of an N-channel implementation of the invention.

6 channels

选择后的分组数据或 到第 HI 103, 发 接收端 N 信道控制器 115， 或送入到第二信道 104至第 6信道 108中的一 言道中， 发送 至接收端 N信道控制器； 图 1中以在第 ·Η言献送 且数据为例， 送的 且 t据经第一信道 103发送到接收端 N信道控制器， 进入 CRC校验器 1设备 109进 行 CRC校验， 如果正确接收， 则在第一信道 103发送 AC ( AC nowledgment )信号 给发送端 N信道控制器， 如果接收不正确， 则在第 言道 103发送 NACK ( Νοη- ACKnowledgment )给发送端 N信道控制器， 要求发送端重传数据； 正确接收的分 组数据在第 存设备 116緩存。 依次从第 冲区 116中输出数据。 (let N = 6). At the sending end, the data to be sent is first input into the first buffer device 101, and the data is buffered and queued in the storage device 101, and then the N channel controller 102, the structure of the N channel controller 102 will be shown in the accompanying drawings 3 is described in detail, after the data is queued and processed in the N channel controller, the choice is to send new packet data at one time or resend the original packet data or resend another

The selected packet data is either sent to the HI 103, sent to the N-channel controller 115 at the receiving end, or sent to one channel in the second channel 104 to the sixth channel 108, and sent to the N-channel controller at the receiving end; FIG. 1 In the example, the data presented in the first line H is taken as an example. The transmitted data is sent to the N-channel controller at the receiving end through the first channel 103, and enters the CRC checker 1 device 109 for CRC check. If it is received correctly, Then send an AC (AC nowledgment) signal to the N-channel controller at the sending end on the first channel 103, and if the reception is incorrect, send a NACK (Non-ACKnowledgment) signal to the N-channel controller at the sending end on the second channel 103, requesting the sending end Retransmit data; correctly received packet data is cached in the storage device 116 . Data is sequentially output from the first flush area 116 .

Accompanying drawing 1 has provided the sequence chart of realizing the method of the present invention. Referring to Figure 2, it is assumed that it is a dual channel, and it is assumed that the time period (Round Trip Delay) for the sender to receive the ACK/NACK sent by the receiver is the time it takes to send 3 packets (Packet), so that the channel 1 first Take sending packets as an example. A new packet is sent on channel 1, followed by another new packet on channel 2. After a delay of 3 packets, the channel 1 of the sending end receives the ACK/NACK signal of the receiving end. If it is ACK, the sending end further judges whether to send a new packet on channel 1. If it is NACK, it sends The terminal judges whether to resend the original packet on channel 1 or discard the original packet and send a new packet according to the initially set channel retransmission times and the maximum channel retransmission times. The method for the sending end to judge according to the received ACK/NACK is described in detail in FIG. 3 . Similarly, when the ACK/NACK signal is received on channel 2, the processing process is the same as that on channel 1. If the timer of channel 1 expires and the ACK/NACK signal from the receiving end is still not received, the sending end judges whether to send the original packet or send a new packet on channel 1. The processing on channel 2 is the same as that on channel 1.

FIG. 3 shows an illustration of the N-channel controller at the transmitting end and the N-channel controller at the receiving end of the present invention. intention. 6 channels as an example, here it is assumed that the maximum number of retransmissions of the channel is 3.

The rules of this scheme are as follows: When the transmitter starts to send packet data, it initializes the waiting flag and the packet counter set on the N channel;

Initialize the retransmission counter set on the N channel, and set the maximum number of retransmissions; Initialize the channel timer set on the N channel, and set the timer length; When the receiving end correctly receives a packet on the dual channel When there is data, the ACK signal is fed back to the corresponding channel of the transmitting end, and the transmitting end selects according to the fed back ACK signal: Send new packet data or set the position of the waiting flag to 1;

When the receiving end does not correctly receive a packet of data on the N channel, it will feed back a NACK signal to the corresponding channel of the transmitting end, and the transmitting end will select according to the fed back NACK signal, the maximum number of retransmissions, and the length of the channel timer: resend the original packet or Send new packet data or set the wait flag bit to 1.

The method, the steps of which include:

At the transmitting end, when the transmitting end sends a packet first, the channel timer is started, and when the timer expires, it is judged whether the retransmission counter of the channel is greater than the maximum number of retransmissions of the channel, and if so, it is judged whether to send a new packet , if not, retransmit the original packet on the channel; if the transmitting end receives the response frame of the receiving end in (410) is an ACK signal, judge whether to send a new packet, enter (413), delete the old data and prepare Send new data; if it is a NAC signal, enter (412), judge whether the retransmission counter of the channel is greater than the maximum number of retransmissions of the channel, if so, judge whether to send a new packet, and then enter (413), delete the old data And prepare to send new data, if not, this letter U sends again (414);

At the receiving end, when the receiving end receives a packet on a channel (401), it first enters (402) for CRC check, and if it is received correctly, it sends an ACK signal to the transmitting end (404) on the channel, and if it is not correct, it Send a NACK signal to the transmitter on the channel (403).

In the method described above, it is characterized in that the N channel can be time division, frequency division, code division, space division, etc., and by setting a waiting flag bit and a packet counter on each channel, the N channel in ARQ can be implemented. Channel scheduling.

Described method, its specific steps include:

Step 101, initialize at the transmitting end: the waiting flag position of each channel of N channels can be set to 0, the sending packet counter of each channel of N channels can be set to 0, and the retransmission counter of each channel of N channels can be set to 0 ; Set the maximum number of retransmissions for each channel retransmission counter on the N channel according to system requirements; determine each channel on the N channel based on the average time from sending a packet to receiving the response frame on the channel plus a delay the length of the channel timer;

The N channel can be set as channel 1, channel 2, channel N-1, and channel N; step 102, first at the transmitting end, sequentially transmit new packets on channel 1, channel 2, channel N-1, and channel N;

Do as follows #support:

Both m and n are positive integers, m MOD N (m modulo n): the remainder obtained by dividing m by n.

When the transmitter sends a packet, it starts to start the channel timer. If the channel timer is already running, it will be cleared and timed again;

Set the maximum number of retransmissions of the channel retransmission counter according to system requirements;

The length of the channel timer is determined according to the average time from sending a packet to receiving the response frame on the channel plus a delay;

When the transmitting end sends a packet first, it starts to start the channel timer. When the timer expires and no response frame NACK or ACK is received from the receiving end, it is judged whether the retransmission counter of the channel packet is equal to the maximum number of retransmissions of the channel. If yes , judge whether to send a new packet or set the channel waiting flag to 1, if not, resend the original packet on the channel;

When the timer on a channel of the transmitting end does not expire and a response frame is received, if it is a NACK signal, it is judged whether the retransmission counter of the channel packet is equal to the maximum number of retransmissions of the channel, and if so, further processing is performed, if No, resend the original packet on this channel; when the timer on a channel of the transmitting end has not expired and a response frame is received, if it is an ACK signal, it is judged whether to transmit a new packet or set the channel waiting flag to 1 ;

When the original packet is retransmitted on a channel, the channel timer is started, the retransmission counter of this packet is increased by 1, and the packet counter of this channel remains unchanged;

When a new packet is transmitted on a channel, the channel waiting flag bit of the channel is 0, the retransmission counter is 1, and the packet counter of the channel is incremented by 1;

When a packet is sent once, the retransmission counter of the packet is 1, and the retransmission counter of the packet is incremented by 1 every time it is retransmitted; when the retransmission counter of the packet exceeds the maximum retransmission times of the channel, the packet is discarded abandon;

When the timer on the channel i (i is a positive integer not greater than N) of the transmitting end has not timed out and a response frame is received and it is an ACK signal, if the channel is channel 1, that is, i is equal to 1, the channel 1 is judged Whether the packet counter is equal to the packet counter of channel N plus 1, if yes, set the waiting flag of channel 1 to 1; if the packet counter of channel 1 is equal to the packet counter of channel N, transmit a new packet on channel 1, And sequentially judge channel 2, channel 3, ..., channel N-1, the waiting flag on channel N, if the waiting flag on channel 2 is 0, end judging the waiting flag on channel 3 to channel N, If the waiting flag bits on channel 2 to channel i (i<=N) are all 1, then transmit new packets on channel 2, channel 3, and channel i in sequence; if the packet counter of channel 1 is equal to the packet of channel N Add 2 to the counter or the packet counter of channel 1 is equal to the packet counter of channel N minus 1, then perform fault diagnosis and end the ARQ process; if the channel is not channel 1, that is, i is not equal to 1, then judge whether the packet counter of channel i is equal to The packet counter on channel i-1, if yes, set the waiting flag on channel i to 1; if the packet counter on channel i is equal to the packet counter on channel i-1 minus 1, then send a new message on channel i , and sequentially judge the channel ( ( i+1 ) MOD N), channel ( ( i+2 ) MOD N), ..., channel ( (i+j) MOD N) (j is a positive integer less than N), The waiting flag on the channel i-1, if the waiting flag on the channel ((i+1) MOD N) is 0, end judging the waiting flag on other channels, if the channel ((i+1) MOD N) , channel ( ( i+2 ) MOD N ) , .. , channel ( ( i+jl) M0D N) (j is a positive integer less than N) the waiting flags are all 1 and channel ( ( i+j ) MOD N ) (j is a positive integer less than N) and the waiting flag bit is 0, then sequentially on channel ( ( i+1 ) MOD N ), channel ( ( i+ ² ) MOD N), ..., channel ( ( i+j- 1 ) MOD N) (j is a positive integer less than N), if channel ( ( i+1 ) MOD N ), channel ( ( i+2 ) MOD N ) , …, channel ( ( i+j) MOD N) (j is a positive integer less than N), ..., the waiting flag bits on channel i-1 are all 1, then sequentially on channel ( (i+1 ) MOD N), channel ( (i+2) MOD N), ..., channel ( (i+j) MOD N) (j is a positive integer less than N), ..., send new packets on channel i- 1; if channel i The packet counter of channel i-1 is equal to the packet counter on channel i-1 plus 1 or the packet counter of channel i is equal to the packet counter on channel i-1 minus 2, then perform fault diagnosis and end the ARQ process;

When the timer on the channel i (i is a positive integer not greater than N) of the transmitting end is not overtime and receives a response frame, if it is a NACK signal, it is judged whether the retransmission counter of the channel i packet is less than the maximum number of retransmissions of the channel, If yes, retransmit the old packet on channel i, and add 1 to the retransmission counter of the packet; if the retransmission counter of the channel i packet is equal to the maximum retransmission times of the channel, discard the packet, if the channel is channel 1, That is, if i is equal to 1, the packet counter of channel 1 is judged Whether it is equal to the packet counter of channel N plus 1, if yes, set the waiting flag bit of channel 1 to 1; if the packet counter of channel 1 is equal to the packet counter of channel N, transmit a new packet on channel 1, and sequentially Judging channel 2, channel 3, channel N-1, the waiting flag on channel N, if the waiting flag on channel 1 is 0, end judging the waiting flag on channel 3 to channel N, if channel 2 to channel i ( i <=N) the waiting flag bits on all are 1, then transmit new packets on channel 2, channel 3, ..., channel i in sequence; if the packet counter of channel 1 is equal to the packet counter of channel N plus 2 or The packet counter of channel 1 is equal to the packet counter of channel N minus 1, then perform fault diagnosis and end the ARQ process; if the channel is not channel 1, that is, i is not equal to 1, then judge whether the packet counter of channel i is equal to channel i-1 If so, set the waiting flag on channel i to 1; if the packet counter on channel i is equal to the packet counter on channel i-1 minus 1, then send a new packet on channel i, and Sequentially judge channel ((i+1) MOD N), channel ((i+2) MOD Ν), ..., channel ((i+j) MOD N) (j is a positive integer less than N), ..., channel i The waiting flag on -1, if the waiting flag on the channel ((i+1) MOD N) is 0, end judging the waiting flag on other channels, if the channel ((i+1) mod N), the channel ((i+2) modulo N), the waiting flag bits on the channel ((i+j-1) modulo N) (j is a positive integer less than N) are all 1 and the channel ((i+j) MOD N) (j is a positive integer less than N) and the waiting flag bit is 0, then in turn on channel ( ( i+1 ) MOD N ), channel ( ( i+2 ) MOD N ), ..., channel ( ( i+j ) -1 ) MOD N) (j is a positive integer less than N), if channel ( ( i+1 ) MOD N) , channel ( ( i+2 ) MOD N ) , ..., channel ( ( i +j ) MOD N ) (j is a positive integer less than N), ..., the waiting flag bits on channel i- 1 are all 1, then in sequence ( ( i+1 ) MOD N) , channel ( ( i+ 2 ) MOD N ), ..., channel ( ( i+j ) MOD N ) (j is a positive integer less than N), ..., send a new packet on channel i-1; if the packet counter of channel i is equal to channel Add 1 to the packet counter on i-1 or the packet counter on channel i is equal to minus 2 to the packet counter on channel i-1, then perform fault diagnosis and end the ARQ process;

When the transmitter first sends a packet on channel i (i is a positive integer not greater than N), it starts the channel timer. When the timer expires and no response frame NACK or ACK is received from the receiver, it judges the channel i packet Whether the retransmission counter is less than the maximum retransmission times of the channel, if so, retransmit the original packet on the channel i; if the retransmission counter of the channel i packet is equal to the maximum retransmission times of the channel, discard the packet, if the channel i is channel 1, that is, i is equal to 1, it is judged whether the packet counter of channel 1 is equal to the packet counter of channel N plus 1, if yes, then set the packet counter of channel 1 The waiting flag bit is 1; if the packet counter of channel 1 is equal to the packet counter of channel N, a new packet is transmitted on channel 1, and the waiting flags on channel 2, channel 3, channel N-1, and channel N are judged in turn bit, if the waiting flag bit on channel 2 is 0, end judging the waiting flag bits on channel 3 to channel N, if the waiting flag bits on channel 2 to channel i (i<=N) are all 1, then in sequence Channel 2, channel 3, ..., transmit new packets on channel i; if the packet counter of channel 1 is equal to the packet counter of channel N plus 2 or the packet counter of channel 1 is equal to the packet counter of channel N minus 1, proceed Fault diagnosis, end the ARQ process; if the channel is not channel 1, that is, i is not equal to 1, then judge whether the packet counter of channel i is equal to the packet counter of channel i-1, if yes, set the waiting flag on channel i The bit is 1; if the packet counter of channel i is equal to the packet counter on channel i-1 minus 1, then a new packet is sent on channel i, and the channel ( ( i+1 ) M(D N) , channel ( ( i+2 ) MOD N), .., channel ( (i+j) MOD N) (j is a positive integer less than N #0, ..., the waiting flag on channel i-1, if the channel ( ( The waiting flag bit on i+1) MOD N) is 0, and the waiting flag bit on other channels is judged. Channel ((i+j-1)N) (j is a positive integer less than N) and the waiting flag bits are all 1 and channel ((i+j) MOD N) (j is a positive integer less than N) If the waiting flag bit of A positive integer of N) to send a new packet, if channel ((i+1) modulo N), channel ((i+2) modulo N), ..., channel ((i+j) modulo N) (j is less than N positive integer), ..., the waiting flag bits on channel i- 1 are all 1, then sequentially on channel ( ( i+1 ) MOD N), channel ( ( i+2 ) MOD N), ..., channel ( ( i+j ) MOD N) (j is a positive integer less than N), ..., a new packet is sent on channel i-1; if the packet counter of channel i is equal to the packet counter on channel i- 1 plus 1 or the The packet counter is equal to the packet counter on channel i-1 minus 2, then perform fault diagnosis and end the ARQ process;

The output of the packet data at the receiving end is strictly in accordance with the order of the transmitting end; that is, to output the packet data Σ, only when the packet data before Z has correctly arrived at the receiving end and has been output;

If the packet data X transmitted after the transmitter arrives at the receiver correctly before the packet data Y transmitted first by the transmitter, at this time, X must be placed in the buffer buffer of the receiver, and after Y arrives at the receiver, output Y, X in sequence ;

If the number of retransmissions at the transmitting end reaches the maximum number of times, and the receiving end has not received it correctly, the packet Y is discarded at the transmitting end; at this time, the packet X is output at the receiving end; By adding a new and old flag in front of the packet, the receiving end is used to distinguish whether the correctly received packet is a new packet or an old packet on a channel;

The method is characterized in that the channel between the transmitting end and the receiving end can be time division, frequency division, code division, space division, etc.

According to this rule, the working mechanism of the N-channel controller at the transmitting end and the N-channel controller at the receiving end is described. Referring to Fig. 3, initialize the channel ^ L counter, the channel waiting flag, and the retransmission counter, as follows: The channel grouping counter is: P-count[l] = 0; P-count [2] = 0; P_count [3] = 0; P-count[4] = 0; P-count[5] = 0; P.count[6] = 0;

The retransmission counter is: R—count [1] = 0; R-count [2] = 0; R-count [3] = 0; R-count [4] = 0; R-count [5] = 0; R.count[6] = 0;

The channel waiting flag bit is: W—flag[l] = 0; W—flag [2] =0; _flag[3] = 0; W—flag [4] = 0; W_flag[5] = 0; W_flag[6 ] = 0;

First, packets 1 to 6 are sent sequentially on channel 1 to channel 6.

At this time, the channel packet counter is: P-count [1] = 1; P-count [2] = 1;

P-count [3] = 1; P-count [4] = 1; P.count [5] = 01; P-count [6] = 1; Packet retransmission counter is: R-count [1] = 1 ; R.count[2] = 1; R_count[3] = 1; R-count[4] = 1; R—count[5] = 1; R—count[6] = 1;

The channel waiting flag bit is: W_flag[l] = 0; W—flag [2] =0; W_flag[3] = 0; W_flag[4] = 0; W—flag [5] = 0; W—flag [6 ] = 0;

At the receiving end, after the CRC check, when a packet is correctly received, an ACK is sent to the sending end on the corresponding channel, and if a packet is not received correctly, a NACK is sent to the sending end on the corresponding channel. At the receiving end, the packets 2, 3, 4, and 6 are received correctly, and the packets 1, 5 are not received correctly, the receiving end sends ACK to the sending end on the corresponding channels 2, 3, 4, and 6, and sends ACK on the channels 1 and 5 NACK to the sender.

Referring to FIG. 3, since the packets transmitted on channels 2, 3, 4, and 6 are all received correctly, there is no need to retransmit packets 2, 3, 4, and 6. Since it was transmitted on channel 1 and channel 5 and 1 and 5 were not received correctly, packet 1 is retransmitted on channel 1, packet 5 is retransmitted on channel 5, and the packet retransmission counter of channel 1 is R-count [1] = 2; retransmission counter R—count [5] = 2 on channel 5; stop transmitting new packets on channel 2, channel 3, channel 4, and channel 6, and their channel waiting flags are all set to 1, namely W.flag[2] = 1; W_flag[3] = 1; W_flag[4] = 1; W—flag[6] = 1;

At this time, channel and counter are: P-count [1] = 1; P-count [2] = 1; P—count [3] = 1; P—count [4] = 1; P.count [5] = 1; P—count [6] = 1;

The packet retransmission counter is: R—count[l] = 2; R.count [2] = 1; R.count [3] = 1; R—count [4] = 1; R.count [5] = 2 ;R.count[6] = 1;

The channel waiting flag bit is: W—flag[l] = 0; W_flag[2] =1; W—flag [3] = 1; W—flag [4] = 1; W—flag [5] = 0; W_flag [6] = 1;

When the retransmitted packet 1 on channel 1 passes the CRC check and is received correctly, the receiving end can output packets 1, 2, 3, and 4 in sequence at this time; the transmitting end receives the ACK signal on channel 1, and transmits a new Correspondingly, new packets 8, 9, and 10 are sequentially transmitted on channel 2, channel 3, and channel 4; when the retransmitted packet 5 on channel 5 passes the CRC check and is received correctly, it can be received at the receiving end Output packets 5 and 6 in sequence; the transmitter receives an ACK signal on channel 5, transmits a new packet 11 on channel 5, and transmits a new packet 12 on channel 6;

At this time, the channel and the counter are: P_count [1] = 2; P_count [2] = 2;

P-count [3] = 2; P-count [4] = 2; P.count [5] = 2; P-count [6] = 2;

The packet retransmission counter is: R—count[l] = 1; R-count [2] = 1; R_count [3] = 1; R-count [4] = 1; R—count [5] = 1; R — count[6] = 1;

The channel waiting flag bit is: W_flag[l] = 0; W—flag [2] = 0; W—flag [3] = 0; W_flag[4] = 0; W_flag[5] = 0; W_flag[6] = 0;

Packet 8 transmitted on channel 2 was not received correctly, packets 7, 9, 10, 11, 12 transmitted on channel 1, channel 3, channel 4, channel 5, channel 6 were received correctly. Transmit new packet 13 on channel 1, output packet 7 at the receiver; retransmit packet 8 on channel 2; at this time R-count [2] = 2, on channel 3, channel 4, channel 5, channel 6 Stop transmitting new packets and their channel waiting flags are all set to 1;

At this time, the channel and the counter are: P-count [1] = 3; P-count [2] = 2;

P.count[3] = 2; P-count[4] = 2; P.count[5] = 2; P_count[6] = 2;

The packet retransmission counter is: R-count [1] = 1; R-count [2] = 2; R.count [3] = 1;

R_count[4] = 1; R.count[5] = 1; R_count[6] = 1;

The channel waiting flag bit is: W_flag[l] = 0; W—flag [2] = 0; W_flag[3] = 1; W—flag [4] = 1; W—flag [5〗 = 1; W—flag [6] = 1;

The packet 13 sent on channel 1 has been checked by CRC and received correctly. When no new packet can be transmitted on channel 1, W_flag[l]=1 at this time. When the retransmitted packet 8 on the channel 2 passes the CRC check and is received correctly, the receiving end sequentially outputs the packets 8, 9, 10, 11, 12, 13; and Transmit new and 14 on channel 2, ^ ^ τΆ 3, transmit new and 15, 16, 17, 18 on channel 4, channel 5, channel 6; ^ and 19 on channel 1;

At this moment, the channel ^ £ counter is: P-count [1] = 4; P-count [2] = 3;

P-count[3] = 3; P-count[4] = 3; P_count[5] = 3; P-count[6] = 3;

The packet retransmission counter is: R-count [l] = 1; R_count [2] = 1; R_count [3] = 1;

R—count [4] = 1; R—count [5] = 1; R—count [6] = 1;

The channel waiting flag bit is: W_flag [l] = 0; W_flag [2] = 0; W—flag [3] = 0; W—flag [4] = 0; W_flag [5] = 0; W—flag [6] ] = 0;

The packets 14, 15 sent by channels 2 and 3 are received correctly after CRC check, and output ^R 14, 15 at the receiving end in turn, and transmit an ACK signal to the transmitting end on the channel, and transmit an ACK signal to the transmitting end on channel 3.

FIG. 4 and FIG. 5 respectively show the working flowcharts of implementing the method of the present invention at the sending end and the receiving end. At the sending end, when the sending end first sends a and, it starts to start the signal timer, and when the timer expires, it is judged whether the retransmission counter of the channel is greater than the maximum number of retransmissions (Nresend_max), if Yes, just refer to the steps shown in Fig. 3 to judge whether to send a new packet, if not, resend the original and on this channel. For example, in the response frame (AC/NACK) from the sending end to the receiving end in step 410, if it is an ACK signal, determine whether to send a new packet, enter step 413, delete the old data and prepare to send new data; if it is a NACK signal, then ^ Step 412, judging whether the retransmission counter of the channel is greater than the maximum number of retransmissions ( Nresend-max ) of the channel, here it is assumed that the maximum number of retransmissions ( Nresend-max ) of the channel is 3, if so, then judging whether to send a new one and, Then step 413, delete the old data and prepare to send new data, if not, resend the original packet on the channel, step 414.

ACK信号给发送端如步骤 404所示， 如果不正确就在该信道 送 NACK信号给发送端如步骤 403所示。 At the receiving end, when the receiving end is connected to—^[言 i J and as shown in step 401, first ^step 402 performs CRC check, if ^ JE is received correctly,

The ACK signal is sent to the sending end as shown in step 404, and if it is incorrect, the NACK signal is sent to the sending end on the channel as shown in step 403.

The implementation of the present invention realizes the timing arrangement of N channels in the ARQ method. The differential control method of the present invention can also be applied to a wireless communication system for high-speed packet data services, to realize the timing arrangement of N channels in the ARQ technology, and to improve the utilization rate of channel resources. The implementation of the present invention "| achieves high channel utilization, facilitates scheduling and fault diagnosis, reduces system complexity and time delay, and improves the effectiveness of the entire communication system.

The above specific embodiments are only used to illustrate the present invention, but not to limit the present invention.

Claims (1)

right to 1. An N-channel ARQ error control method for high-speed wireless packet data services, wherein: the transmitting end adopts N-channel control to the packet data sent, and processes the packet data to be sent according to the signal fed back by the receiving end, so that the The transmitted packet data satisfies the timing arrangement of the N channel; the receiving end performs N channel control on the received signal, checks the received packet data, and feeds back the signal to the transmitting end. 2. The method according to claim 1, wherein the said transmitting end adopts N-channel control on the sent packet data means: the transmitting end counts the retransmissions of the sent packet data. 3. The method according to claim 1, characterized in that, the transmitting end adopting N channel control for the sent packet data refers to: setting a waiting flag bit on the N channel, and the waiting flag bit can identify the N channel The packet data transmission status of each individual channel of the channel. 4. The method according to claim 1, characterized in that, said transmitting end using N-channel control on the sent packet data means: using a packet counter on N-channels to control each individual channel of said N-channels The grouped data is grouped and counted. 5. The method according to claim 1, wherein the transmitting end adopts N-channel control for the transmitted packet data means: timing the packet data of each single channel of the N channels. 6. The method according to claim 1, characterized in that, the transmitting end adopts N channel control for the transmitted packet data means: the transmitting end counts the retransmission of the packet data of each single channel of the N channels; And set a waiting flag bit on the N channel, and the waiting flag bit can identify the packet data sending status of each single channel of the N channels. 7. The method according to claim 1, characterized in that, the transmitting end adopts N channel control for the transmitted packet data means: the transmitting end counts the retransmission of the packet data of each single channel of the N channels; And using a packet counter on the N channel to count the packet data of each single channel of the N channel. 8. The method according to claim 1, characterized in that, the transmitting end adopting N-channel control for the transmitted packet data refers to: setting a waiting flag bit on the N channel, and the waiting flag bit can identify the N channel The packet data transmission status of each single channel of the channels; and using a packet counter on the N channels to count the packet data of each single channel of the N channels. 9. The method according to claim 1, characterized in that, the transmitting end adopts N-channel control for the transmitted packet data refers to: the transmitting end controls the number of packets of each single channel of the N channels The data is retransmitted and counted; and the waiting flag bit is set on the N channel, and the waiting flag bit can identify the packet data sending status of each single channel of the N channel; performing packet counting on the packet data of each single channel of the N channels; and timing the packet data of each single channel of the N channels; The receiving end checks the received packet data and feeds back a signal to the transmitting end refers to: the receiving end performs CRC check on the received packet data, repeats detection, sends a response frame, and buffers the received packet data . 10. The method according to claim 1, the steps comprising: When the transmitter starts to send packet data, it initializes the waiting flag and packet counter set on the N channel; Initialize the retransmission counter set on the N channel, and set the maximum number of retransmissions; Initialize the channel timer set on the N channel, and set the timer length; When the receiving end correctly receives a packet on the N channel When there is data, the ACK signal is fed back to the corresponding channel of the transmitter; The transmitter selects according to the feedback ACK signal: Send new packet data or set the waiting flag position to 1; When the receiving end does not correctly receive a packet of data on the N channel, the NACK signal is fed back to the corresponding channel of the transmitting end; The transmitting end selects according to the fed back NACK signal, the maximum number of retransmissions, and the length of the channel timer: resend the original packet or send new packet data, or set the waiting flag to 1. 11. The method according to claim 9, the steps comprising: At the transmitting end: when starting to send packet data, initialize the waiting flag and packet counter set on the N channel; Initialize the retransmission counter set on the N channel, and set the maximum number of retransmissions; Initialize the channel timer set on the N channel, and set the timer length; When the transmitter sends a packet first, it starts to start A channel timer, when the timer expires, it is judged whether the retransmission counter of the channel is greater than the maximum number of retransmissions of the channel, if yes, it is judged whether to send a new packet, if not, the original packet is retransmitted on the channel; If the response frame received by the transmitter in (410) is an ACK signal, judge whether to send a new packet, enter (413), delete the old data and prepare to send new data; if it is a NACK signal, enter (412), and judge Whether the retransmission counter of the channel is greater than the maximum number of retransmissions of the channel, if Yes, then determine whether to send a new packet, then enter (413), delete the old data and prepare to send new data, if not, resend the original packet on the channel (414); At the receiving end: when the receiving end receives a packet on a channel (401), it first enters (402) for CRC check, if it is received correctly, it sends an ACK signal to the transmitting end (404) on the channel, if it is not correct Just send a NACK signal to the transmitting end on this channel (403); add a new and old flag bit in front of the packet, and the receiving end is used to distinguish whether the correctly received packet is a new packet or an old packet on a channel. 12. The method according to claim 9, the steps comprising: On the transmitter side: buffer the input data ( 101 ); Initialize, that is: the waiting flag position of each channel of N channels can be set to 0, the sending packet counter of each channel of N channels can be set to 0, the retransmission counter of each channel of N channels can be set to 0; set according to system requirements Determine the maximum number of retransmissions of each channel retransmission counter on the N channel; determine the number of each channel timer on the N channel according to the average time from sending a packet to receiving the response frame on the channel plus a delay length; The N channel can be set as channel 1, channel 2, channel N-1, and channel N; first, at the transmitting end (102), new packets are transmitted on channel 1, channel 2, channel N-1, and channel N in sequence; It can be assumed that m and n are both positive integers, and m modulo n is the remainder obtained by dividing m by n. When the transmitter sends a packet, it starts to start the channel timer. If the channel timer is already running, it will be cleared and timed again; When the timer expires and no response frame NACK or ACK is received from the receiving end, it is judged whether the retransmission counter of the channel packet is equal to the maximum number of retransmissions of the channel, and if so, it is judged whether to send a new packet or set the channel waiting flag to 1, if not, resend the original packet on the channel; When the timer on a channel of the transmitter has not expired and a response frame is received, if NAC signal, judge whether the retransmission counter of the channel packet is equal to the maximum retransmission times of the channel, if yes, perform further processing, if not, retransmit the original packet on the channel; The device does not time out and receives a response frame, if it is an ACK signal, it is judged whether to transmit a new packet or set the channel waiting flag to 1; When the original packet is retransmitted on a channel, the channel timer is started, the retransmission counter of this packet is increased by 1, and the packet counter of this channel remains unchanged; When a new packet is transmitted on a channel, the channel waiting flag bit of the channel is 0, the retransmission counter is 1, and the packet counter of the channel is incremented by 1; When a packet is sent once, the retransmission counter of the packet is 1, and every time it is retransmitted, the retransmission counter of the packet is accumulated by 1; when the retransmission counter of the packet exceeds the maximum number of retransmissions of the channel, the packet is discarded ; When the timer on the channel i of the transmitter has not timed out and a response frame is received and it is an ACK signal, if the channel is channel 1, that is, i is equal to 1, it is judged whether the packet counter of channel 1 is equal to the packet counter of channel N plus 1. If yes, set the waiting flag of channel 1 to 1; if the packet counter of channel 1 is equal to the packet counter of channel N, transmit a new packet on channel 1, and judge channel 2, channel 3, . .., channel N- 1, the waiting flag on channel N, if the waiting flag on channel 2 is 0, finish judging the waiting flag on channel 3 to channel N, if the waiting flag on channel 2 to channel i Bits are all 1, then transmit new packets on channel 2, channel 3, and channel i in sequence; if the packet counter of channel 1 is equal to the packet counter of channel N plus 1 or the packet counter of channel 1 is equal to the packet counter of channel N minus 1, then perform fault diagnosis and end the ARQ process; if the channel is not channel 1, that is, i is not equal to 1, then judge whether the packet counter of channel i is equal to the packet counter on channel i-1, and if so, set channel i The waiting flag bit on channel i is 1; if the packet counter on channel i is equal to the packet counter on channel i-1 minus 1, then a new packet is sent on channel i, and the channel is judged in turn ((i+1) MOD N) , channel ( (i+2) MOD N ), ..., channel ( ( i+j ) MOD N ), ..., the waiting flag on channel i- 1, if the channel ( ( i+1 ) MOD N) The waiting flag bit is 0, end judging the waiting flag bits on other channels, if the channel ( ( i+1 ) MOD N ) , channel ( ( i+2 ) MOD N), ..., the waiting flags on channel ( ( i+j-1 ) MOD N) are all 1 and the channel ( ( i+j ) MOD N) and the waiting flag bit is 0, then the channel ( ( i+1 ) MOD N) , channel ( (i+2) MOD N) , ..., channel ( ( i+j-1 ) MOD N ), if channel ( ( i+1 ) MOD N ), channel ( ( i+2 ) MOD N ), ..., channel ( (i+j) MOD N), ..., the waiting flag bits on the channel i-1 are all 1, then in the channel (( i+1 ) MOD N), channel ( ( i+2 ) MOD N), ·.., channel ((i+j) MOD N), ..., a new packet is sent on channel i-1; if the packet counter on channel i is equal to the packet counter on channel i-1 plus 1 or channel i The packet counter of is equal to the packet counter on channel i-1 minus 2, then perform fault diagnosis and end the ARQ process; When the timer on the channel i of the transmitting end does not expire and a response frame is received, if it is a NACK signal, it is judged whether the retransmission counter of the channel i packet is less than the maximum number of retransmissions of the channel, and if so, it is retransmitted on the channel i If the retransmission counter of the channel i packet is equal to the maximum retransmission times of the channel, the packet is discarded, and if the channel is channel 1, that is, i is equal to 1, the channel 1 is judged Whether the packet counter is equal to the packet counter of channel N plus 1, if yes, set the waiting flag bit of channel 1 to 1; if the packet counter of channel 1 is equal to the packet counter of channel N, transmit a new packet on channel 1, And sequentially judge channel 2, channel 3, ..., channel N-1, the waiting flag on channel N, if the waiting flag on channel 2 is 0, end judging the waiting flag on channel 3 to channel N, If the waiting flag bits on channel 2 to channel i are all 1, then transmit new packets on channel 2, channel 3, and channel i in sequence; if the packet counter of channel 1 is equal to the packet counter of channel N plus 2 or channel 1 The packet counter of channel N is equal to the packet counter of channel N minus 1, then perform fault diagnosis and end the ARQ process; if the channel is not channel 1, that is, i is not equal to 1, then judge whether the packet counter of channel i is equal to the Packet counter, if yes, set the waiting flag on channel i to 1; if the packet counter on channel i is equal to the packet counter on channel i-1 minus 1, then send a new packet on channel i, and judge in turn Channel ( ( i+1 ) MOD N ), channel ( ( i+2 ) MOD Ν ), . . . , channel ( ( i+j ) MOD N ) (j is a positive integer less than N), ..., The waiting flag on the channel i-1, if the waiting flag on the channel ((i+1) MOD N) is 0, end judging the waiting flag on other channels, if the channel ((i+1) MOD N) , the channel ( (i+2 ) MOD N ), ..., the waiting flag bits on the channel ( ( i+j- 1 ) MOD N ) are all 1 and the waiting flag bits on the channel ( ( i+j ) MOD N ) is 0, then in turn in channel ( ( i+1 ) MOD N ), channel ( ( i+2 ) MOD N ), ..., channel ( ( i+j- 1 ) MOD N ) (j is a positive integer less than N ), if channel ( ( i+1 ) MOD N ), channel ( (i+2 ) MOD N ), …, channel ( (i+j ) MOD N ), …, channel i- 1 The waiting flags are all 1, then in the order of channel ( ( i+1 ) MOD N ), channel ( ( i+2 ) MOD N ), ..., channel ( ( i+j ) MOD N ), ..., channel i Send a new packet on -1; If the packet counter on channel i is equal to the packet counter on channel i-1 plus 1 or the packet counter on channel i is equal to the packet counter on channel i-1 minus 2, perform fault diagnosis and end ARQ process; when the transmitting end first sends a packet on channel i, the channel timer is started, and when the timer expires and no response frame NACK or ACK is received from the receiving end, it is judged whether the retransmission counter of the channel i packet is less than the maximum retransmission counter of the channel number of transmissions, if yes, resend the original transmission on the channel i Grouping; If the retransmission counter of the channel i packet is equal to the maximum number of retransmissions of the channel, the packet is discarded. If the channel is channel 1, that is, i is equal to 1, it is judged whether the packet counter of channel 1 is equal to the packet counter of channel N plus 1 , if yes, set the waiting flag of channel 1 to 1; if the packet counter of channel 1 is equal to the packet counter of channel N, transmit a new packet on channel 1, and judge channel 2, channel 3, .. ., channel N-1, the waiting flag on the channel N, if the waiting flag on the channel 2 is 0, finish judging the waiting flags on the channel 3 to the channel N, if the waiting flags on the channel 2 to the channel i are all 1, then transmit new packets sequentially on channel 2, channel 3, ..., channel i; if the packet counter of channel 1 is equal to the packet counter of channel N plus 2 or the packet counter of channel 1 is equal to the packet counter of channel N Subtract 1, then perform fault diagnosis and end the ARQ process; if the channel is not channel 1, that is, i is not equal to 1, then judge whether the packet counter of channel i is equal to the packet counter on channel i-1, and if so, set the channel The waiting flag bit on i is 1; if the packet counter on channel i is equal to the packet counter on channel i-1 minus 1, then send a new packet on channel i, and judge the channel in turn ( ( i+1 ) MOD N ), channel ( ( i+2 ) MOD N ), ..., channel ( ( i+j ) MOD N ), ..., the waiting flag on channel i-1, if the channel ( ( i+1 ) MOD N ) The waiting flag bit of is 0, end judging the waiting flag bits on other channels, if channel ( (i+1 ) MOD N ), channel ( ( i+2 ) MOD N ), ..., channel ( ( i+j- 1 ) MOD N ) and the waiting flag bits on the channel ( ( i+j ) MOD N ) are all 1 and the waiting flag bits on the channel ( ( i+j ) MOD N ) are 0, then in turn on the channel ( ( i+1 ) MOD N ), channel ( ( i+2 ) MOD N ), ·.·, send new packets on channel ( ( i+j-1 ) MOD N ), if channel ( ( i+1 ) MOD N ) , channel ( ( i+2 ) MOD N ), ..., channel ( (i+j ) MOD N ), the waiting flag bits on channel i-1 are all 1, then in turn in channel ( ( i+1 ) MOD N ), channel ( ( i+2 ) MOD N ) , channel ( ( i+j ) MOD N ) , a new packet is sent on channel i-1; if the packet counter on channel i is equal to the packet counter on channel i- 1 plus 1 or the packet counter on channel i is equal to the packet counter on channel i - 1 The packet counter is decremented by 2, then the fault diagnosis is performed, and the ARQ process is ended; The output of the packet data at the receiving end is strictly in accordance with the order of the transmitting end; that is, to output the packet data Z, only when the packet data before Z has correctly arrived at the receiving end and has been output; it has indeed arrived at the receiving end, at this time, X must be placed at the receiving end Buffer cache, wait until Y arrives at the receiving end, output Y, X in sequence; If Y reaches the maximum number of retransmissions at the transmitting end and has not been received correctly at the receiving end, the packet Y is discarded at the transmitting end; at this time, packet X is output at the receiving end; By adding a new and old flag in front of the packet, the receiving end is used to distinguish whether the correctly received packet is a new packet or an old packet on a channel. 13. The method according to any one of claims 1 to 12, characterized in that the channel between the transmitting end and the receiving end can be time division, frequency division, code division, space division, etc. 14. The method according to any one of claims 1 to 12, characterized in that, the method is especially suitable for a TDD communication system. 15. An N-channel ARQ error control device for high-speed wireless packet data services, including: an N-channel controller, a channel transmitter, and a channel receiver; The output of the N channel controller is the input of the channel transmitter; the output of the channel transmitter is the input of the channel, and the output of the channel is the input of the channel receiver. 16. The device according to claim 15, characterized in that, the N-channel controller includes at least a retransmission counter; the N-channel controller can set the retransmission counter to set the N-channel The packet data of each single channel is counted for retransmission. 17. The device according to claim 15, wherein the N-channel controller includes at least a channel waiting flag; the N-channel controller can set the waiting flag to identify one of the N channels Packet data transmission status for each single channel. 18. The device according to claim 15, characterized in that, the N-channel controller includes at least a packet counter; the N-channel controller can set the packet counter for each individual of the N-channel The channel's packet data is counted in packets. 19. The device according to claim 15, wherein the N channel controller may include a channel waiting flag and a packet counter; wherein: The N channel controller can set the waiting flag bit to identify the packet data sending status of each single channel of the N channel; The N-channel controller can set the packet counter to count the packet data of each single channel of the N-channels. 20. The device according to claim 15, wherein the N-channel controller may include a channel waiting flag, a packet counter, and a retransmission counter; wherein: the N-channel controller may set the waiting flag , used to identify the packet data sending status of each single channel of the N channel; the N channel controller can set the packet counter to set the N channel The packet data of each individual channel of the channel is counted in packets; the N channel controller can set the retransmission counter to perform retransmission counting of the packet data of each individual channel of the N channels. 21. The device according to claim 15, wherein the N-channel controller may include a channel waiting flag, a packet counter, a retransmission counter, and a channel timer; wherein: the N-channel controller may wait for the The flag bit is set to identify the packet data sending status of each single channel of the N channels; the N channel controller can set the packet counter to set the packet data of each single channel of the N channels Perform packet counting; the N channel controller can set the retransmission counter for retransmission counting of the packet data of each single channel of the N channel; the N channel controller can set the channel timer, It is used for timing the packet data of each single channel of the N channels. 22. The device according to claim 15, wherein the channel transmitter can be composed of N channel transmitters. 23. The device according to claim 15, wherein the channel receiver can be composed of N channel receivers. 24. The device according to claim 15, further comprising a CRC checker, and the channel receiver inputs the received signal into the CRC checker for checking. 25. The device according to claim 24, wherein the CRC checker can be composed of N CRC checkers.