WO2003084115A1 - Procede instantane de gestion d'erreurs d'un canal n de systeme de telecommunications et appareil a cet effet - Google Patents

Procede instantane de gestion d'erreurs d'un canal n de systeme de telecommunications et appareil a cet effet Download PDF

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Publication number
WO2003084115A1
WO2003084115A1 PCT/CN2002/000216 CN0200216W WO03084115A1 WO 2003084115 A1 WO2003084115 A1 WO 2003084115A1 CN 0200216 W CN0200216 W CN 0200216W WO 03084115 A1 WO03084115 A1 WO 03084115A1
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WO
WIPO (PCT)
Prior art keywords
channel
packet
retransmission
flag
data
Prior art date
Application number
PCT/CN2002/000216
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English (en)
Chinese (zh)
Inventor
Chengming Wu
Xiaohua Liu
Xiaobin Wu
Original Assignee
Linkair Communications, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to CNA028181182A priority Critical patent/CN1555631A/zh
Application filed by Linkair Communications, Inc. filed Critical Linkair Communications, Inc.
Priority to AU2002252931A priority patent/AU2002252931A1/en
Priority to PCT/CN2002/000216 priority patent/WO2003084115A1/fr
Priority to CNA028181158A priority patent/CN1555630A/zh
Publication of WO2003084115A1 publication Critical patent/WO2003084115A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/188—Time-out mechanisms
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1809—Selective-repeat protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L2001/0092—Error control systems characterised by the topology of the transmission link
    • H04L2001/0096—Channel splitting in point-to-point links

Definitions

  • the present invention relates to the field of electrical communication technology, and in particular to a no-wait N-channel ARQ error control method and device for a communication system.
  • Third-generation mobile communication (3G) systems are required to support multiple services such as voice, image, and data, and especially to support multimedia and high-bit-rate packet data services.
  • an efficient and reliable communication mechanism must be adopted.
  • a high-dimensional modulation method is applied to a 3G system, thereby increasing the peak rate of the system.
  • the problems brought by this are: the reliability of the system is seriously challenged, because on the wireless channel, multipath, shadow, and Doppler frequency shifts will seriously degrade the performance of the high-dimensional system, causing random errors and Sudden errors coexist. If an effective error control mechanism is not adopted, it is difficult to achieve reliable data transmission.
  • HARQ Hybrid Automat ic Repeat reQues t M is a system-level error control technology to meet the requirements for Quality of Service (QoS).
  • the present invention proposes a no-wa it N-channel ARQ error control method and device for a communication system, so that when one channel does not transmit new data, the subsequent channels There is no need to stop transmitting new data, which maximizes the channel utilization and greatly improves the transmission efficiency, and the receiver only needs to have a buffer that can hold N packet data.
  • the present invention provides a no-wai t N-channel ARQ error control method for a communication system, wherein: the transmitting end performs N-channel transmission timing control on the transmitted packet data, so that when any of the N channels is in When no new data is sent on the previous channel, the channel after the previous channel can still send new data; The receiving end sends a response frame and buffers the received packet data.
  • the N-channel transmission timing control of the transmitted packet data by the transmitting end refers to: using a retransmission counter on the N channel to retransmit the packet data of each single channel of the N channel.
  • the transmitting terminal performs N-channel transmission timing control on the transmitted packet data refers to: setting a channel balance flag bit on each single channel of the N-channel to mark whether a channel with a better channel quality in each single channel is heavy. Send the data on the previous channel with poor channel quality.
  • the N-channel transmission timing control of the transmitted packet data by the transmitting end refers to: using a channel timer on the N channel to time the packet data of each single channel of the N channel.
  • the N-channel transmission timing control of the transmitted packet data by the transmitting terminal refers to: setting a retransmission flag bit on each single channel of the N channel to mark whether to retransmit the old packet or transmit a new packet. .
  • the N-channel transmission timing control of the transmitted packet data by the transmitting end refers to: using a retransmission counter on the N channel to retransmit the packet data of each single channel of the N channel; A channel balance flag is set on a single channel to mark whether a channel with a better channel quality in each single channel retransmits data on a channel with a weaker channel shield on the previous channel; a channel timer pair is used on the N channel The packet data of each single channel of the N channel is timed; a retransmission flag bit is set on each single channel of the N channel to mark whether to retransmit the old packet or to transmit a new packet.
  • the sending of a response frame by the receiving end and buffering the received packet data means that: the receiving end repeatedly detects the received packet data and buffers the received packet data.
  • the buffering of the received packet data means that: the receiving end only needs to accommodate the buffer area of N packets.
  • the steps include:
  • the retransmission flag and the balance flag set on the N channel are initialized, and the retransmission flag and the balance flag of each channel are set to zero;
  • the NACK signal is fed back to the corresponding channel of the transmitting end.
  • the transmitting end selects according to the feedback NACK signal, the maximum number of retransmission times, and the channel timer length: resend the original packet data Either send new packet data or resend the old packet data on another channel.
  • the steps further include:
  • the N channel can be set to channel 1, channel 2 channel N-1, channel N;
  • new packets 1, 2 N-1, and N are transmitted in sequence on channel 1, channel 2, channel N-1, and channel N;
  • the transmitting end When the transmitting end sends a packet, it starts the channel timer. If the channel timer is already running, it will be cleared and re-counted.
  • the channel timer is started. When the timer expires and no response frame NACK or ACK is received from the receiving end, it is determined whether the retransmission counter of the channel packet is equal to the maximum number of retransmissions of the channel. To determine whether to send a new packet or retransmit a packet on a previous channel, and if not, retransmit the original packet on the channel;
  • the timer on a channel of the transmitting end does not expire and a response frame is received, if it is a NAC signal, it is judged whether the retransmission counter of the channel packet is equal to the maximum number of retransmissions of the channel. If so, further processing is performed. If not , The original packet is retransmitted on this channel; when the timer on one channel of the transmitting end does not expire and a response frame is received, if it is an ACK signal, it is determined whether to transmit a new packet or retransmit a packet on another channel ;
  • the channel timer starts. Increment the group's retransmission counter
  • the channel balance flag of the channel is 0, and the retransmission flag is 0;
  • the packet retransmission counter When a packet is sent once, the packet retransmission counter is 1, and each time the packet is retransmitted, the packet retransmission counter is incremented by 1. When the packet retransmission counter exceeds the maximum number of channel retransmissions, the packet is discarded. When-the packet retransmission counter on a channel is greater than 1, the retransmission flag of the channel is 1;
  • the old packet on channel j will be retransmitted on channel i. If the channel balance flag on channel i's previous channel j is 1, the old packet retransmitted on channel j will be determined. Whether the retransmission counter of the channel is equal to the maximum number of retransmissions of the channel, and if so, a new packet is transmitted on channel i, and if the retransmission counter of the old packet retransmitted on channel j is less than the maximum retransmission number of the channel Retransmit old packets on channel j just on channel i;
  • the channel timer starts.
  • the timer expires and no response frame NACK or ACK is received from the receiving end, it is determined whether the retransmission counter of the channel i packet is less than the maximum number of retransmissions of the channel.
  • a new packet is transmitted on channel i. If the retransmission counter for the packet on channel j is less than the maximum number of retransmissions of the channel, the old packet on channel j is retransmitted on channel i; if the signal on channel i's previous channel j The channel balance flag is 1, and it is determined whether the retransmission counter of the old packet retransmitted on channel j is equal to the maximum number of retransmissions of the channel. If it is, a new packet is transmitted on channel i. If the channel j is retransmitted, The retransmission counter of the old packet is less than the maximum number of retransmissions of the channel, and the old packet on the channel j is retransmitted on the channel i;
  • the output of the packet data at the receiving end strictly follows the order of the transmitting end; that is, the packet data Z must be output, only if the packet data before Z has correctly arrived at the receiving end and has been output;
  • the packet is discarded at the transmitting end at this time; at this time, the packet X is output at the receiving end;
  • a 1-bit old and new flag is added in front of the packet, and the receiving end is used to distinguish on a channel whether the correctly received packet is a new packet or an old packet;
  • the receiver uses it to distinguish whether the correctly received packet is an old packet on the previous channel.
  • the method is characterized in that the channel between the transmitting end and the receiving end may be time division, frequency division, code division, space division, or the like.
  • the method is characterized in that the N channel is always in a transmitting state and the channel is fully utilized.
  • the method is characterized in that the N channel of the transmitting end always maintains the order of the packet data, Transmitting packets do not need to be serialized.
  • the present invention also provides a no-wait N-channel ARQ error control device for a communication system, which includes: a transmitting-end N-channel controller and a receiving-end N-channel controller;
  • Controlled by the N-channel controller of the transmitting end so that: when any previous channel of the N channels does not send new data, the channel after the previous channel can still send new data; control by the N-channel of the receiving end
  • the control of the processor enables the receiving end to repeatedly detect the received packet data, send a response frame, and buffer the received packet data.
  • the transmitting-end N-channel controller may include: a retransmission counter
  • a retransmission counter is used on the N channel to retransmit the packet data of each single channel of the N channel.
  • the N-channel controller at the transmitting end may include: a channel balance flag bit setting device; and using a channel balance flag bit setting device to set a channel balance flag bit on each single channel of the N channel to mark the channel in each single channel Whether the channel with better shield retransmits the data on the previous channel with poor quality.
  • the transmitting-end N-channel controller may include: a timer
  • a timer is used on the N channel to time the packet data of each single channel of the N channel.
  • the transmitting-end N-channel controller may include: a retransmission flag bit setting device;
  • a retransmission flag bit setting device is used to set a retransmission flag bit, which is used to mark whether to retransmit the old packet or to transmit a new packet.
  • the transmitting-end N-channel controller may include: a retransmission counter, a channel balance flag bit setting device, a timer, and a retransmission flag bit setting device;
  • a channel balance flag bit setting device is used to set a channel balance flag bit, which is used to indicate whether a channel with a better channel quality in each single channel retransmits a signal on a channel with a poorer channel quality Data
  • a retransmission flag bit setting device is used to set a retransmission flag bit, which is used to mark whether to retransmit the old packet or transmit a new packet.
  • the receiving-end N-channel controller includes: a detection device;
  • the receiving end uses a detection device to repeatedly detect the received packet data.
  • the receiving-end N-channel controller includes: a buffer device
  • the receiving end uses a buffering device to buffer the received packet data.
  • the receiving-end N-channel controller includes: a detection device and a buffer device;
  • the receiving end uses a detection device to repeatedly detect the received packet data
  • the receiving end uses a buffering device to buffer the received packet data.
  • the transmitting N-channel controller may include: a retransmission counter, a channel balance flag setting device, a timer, and a retransmission flag setting device; the receiving N channel controller includes: a detection device and a buffer device;
  • a channel balance flag bit setting device is used to set a channel balance flag bit, which is used to indicate whether a channel with a better channel quality in each single channel retransmits a signal on a channel with a poorer channel quality Data
  • a retransmission flag bit setting device to set a retransmission flag bit on each single channel of the N channel to mark whether to retransmit the old packet or to transmit a new packet
  • the receiving end uses a detection device to repeatedly detect the received packet data
  • the receiving end uses a buffering device to buffer the received packet data, and the receiving end only needs to accommodate a buffer of N packets.
  • the beneficial effects of the present invention are as follows:
  • the present invention proposes a no-wa it N-channel ARQ error control method and device for a communication system, so that when one channel does not transmit new data, subsequent channels do not need to stop transmitting new data.
  • Data which maximizes the channel utilization and greatly improves the transmission efficiency, and the receiver only needs to have a buffer that can hold N packet data.
  • the present invention significantly improves the channel utilization rate and the throughput of the system without increasing the complexity of the system. That is, the buffer at the receiving end is not increased, the complexity of the system is not increased, and the order of sending packets is maintained, which greatly improves the throughput of the communication system.
  • Figure 1 shows the number of transmissions of "multi-channel stop-and-wait ARQ transmission" proposed by Ericsson in the prior art. Time chart according to grouping;
  • FIG. 2 shows a time chart of transmitting data packets according to the present invention
  • FIG. 3 shows a schematic diagram of a transmitting-end N-channel controller and a receiving-end N-channel controller of the present invention
  • FIG. 1 shows a time chart for transmitting data packets of “multi-channel stop-and-wait ARQ transmission” proposed by Ericsson. Derived from "Multi-channel stop-and-wait ARQ transmission” proposed by Ericsson, ('Mul t i-channel automa t ic retransmi s ion query (ARQ) method', U.S. Patent No. 6021124).
  • each round trip is divided into 6 time slots labeled ARQ channel AF, in a time division multiplexing manner, the source 16 starts from the first ARQ channel A to the last The multiplexing cycle in which the ARQ channel F ends transmits data packets in turn.
  • the ARQ channel waits to receive an acknowledgement from destination 18 before transmitting a new data packet.
  • the source suspends multiplexing the data packets and retransmits only the NACK data packets during the second round.
  • Figure 1 shows that the fourth data packet (indicated by the number 4) transmitted on ARQ channel D is NAK.
  • the source 16 of the data packets continues to be transmitted on the ARQ channels E, F, etc. during the first round.
  • the fourth data packet is retransmitted on channel D during the second round. If the data packets transmitted on channels E, F, A, B, C during the first round are all ACKed, which is the case in this example, then the source 16 only retransmits the fourth of the NACK during the second round
  • the data packet stops transmitting new data packets on the subsequent ARQ channel until the ACK of the fourth data packet is received.
  • Source 16 remains idle until source 16 reaches ARQ channel D during the third round. If during the third round, an ACK is received in response to the retransmission of the fourth packet, a new data packet is transmitted on the ARQ channel D, that is, the first Q packet. Assuming that the previous data packets transmitted on the ARQ channel have been ACKed, new data packets are transmitted on the subsequent ARQ channels E to F. In the figure, it can be seen from the gap in the source channel (Tx) queue (indicated by the small red triangle) that the channel resources have not been fully used.
  • FIG. 1 shows a time chart of a transmission data packet according to the present invention. It can be seen that the idle channel in Figure 1 is fully utilized in Figure 2.
  • the invention improves the channel utilization rate, can significantly improve the throughput of the communication system, and especially transmits packet data on a deteriorated wireless channel.
  • This invention is proposed by Er ics son Compared with the "multi-channel stop and other ARQ transmission", it does not increase the buffer at the receiving end, does not increase the system complexity, and can maintain the order of sending packets, which greatly improves the throughput of the communication system.
  • Figure 2 uses 6 channels as an example. Here it is assumed that the maximum number of retransmissions of the channel is 3. Specific implementation rules of the present invention are shown in detail in FIG. The time chart for transmitting data packets according to the present invention is described in accordance with the implementation rules illustrated in FIG.
  • Packets 1 to 6 are transmitted in sequence on channels 1 to 6 first.
  • an ACK is sent to the sending end on the corresponding channel. If a packet is not received correctly, a NACK is sent to the sending end on the corresponding channel.
  • packet 1 is transmitted in sequence on channels 1 to 6 first.
  • the retransmission counter for packet 4 is 3, regardless of whether the sender receives NACK or ACK on channels 4, 5, after transmitting packet 13 on channel 3, it transmits packets 14, 15 on channels 4, 5 in turn.
  • Packets 10 and 12 transmitted on channels 6 and 2 are not received correctly, and packets 11, 13, 14, 15 transmitted on channels 1, 3, 4, 5 are received correctly.
  • Packet 10 is retransmitted on channel 6, and packet 11 sent on channel 1 is received correctly, but a new packet cannot be transmitted, and packet 10 can be retransmitted.
  • Packet 12 sent on channel 2 was not received correctly, and packet 12 was retransmitted on channel 2.
  • the packet 13 sent on the channel 3 is received correctly, but a new packet cannot be sent, and the packet 12 can be retransmitted.
  • Packets 14, 15 sent on channels 4, 5 are received correctly. Since the retransmission counters of packets 10 and 12 are both 3, the maximum number of retransmissions of the channel has been reached, and new packets 16, 17 are sent in sequence on channels 4, 5 . Since the retransmission counters of packets 10 and 12 are both 3, the maximum number of retransmissions of the channel has been reached.
  • Channels 6, 1, 2, 3 send packets 18, 19, 20, 21 in sequence after channel 5 has transmitted packet 17. When packets 16, 17, 18 are received correctly, the sender sends packets 22, 23, and 24 in sequence on channels 4, 5, and 6.
  • Packets 1, 2, 3 are received correctly, and packets 1, 2, 3 can be output in sequence.
  • Packets 5 and 6 are received correctly. Because packets 4 are not received correctly, packets 5 and 6 cannot be output and must be placed. Cache in the buffer. Wait until packet 4 is received correctly, and then output packets 4, 5, and 6 in order. Packets 7, 8, 9 are received correctly, and packets 7, 8, 9 are output in sequence. Packet 11 is received correctly. Since packet 10 is not received correctly, packet 10 is placed in the buffer cache. Wait until packet 10 is received correctly, and output packets 10 and 11 in sequence. Packets 13, 14, 15 are received correctly. Since packet 12 is not received correctly, packets 1 3, 14, 15 are placed in the buffer cache. Wait until packet 12 is received correctly, and output packets 12, 1 3, 14, 15 in order. Packets 16, 17, 18 are received correctly, and packets 16, 17, 18 are output in sequence.
  • Fig. 3 shows a schematic diagram of a transmitting-end N-channel controller and a receiving-end N-channel controller of the present invention.
  • 6 channels are assumed here.
  • the maximum number of retransmissions of the channel is 3.
  • the retransmission flag and the balance flag set on the N channel are initialized, and the retransmission flag and the balance flag of each channel are set to zero;
  • the NAC signal is fed back to the corresponding channel of the transmitting end.
  • the transmitting end selects according to the feedback NACK signal, the maximum number of retransmissions, and the channel timer length: resend the original packet data Either send new packet data or resend the old packet data on another channel.
  • the transmitting end When the transmitting end sends a packet, it starts the channel timer. If the channel timer is already running, it will be cleared and re-counted.
  • the channel timer starts.
  • the timer expires and no response frame MCK or ACK is received from the receiving end, it is determined whether the retransmission counter of the channel packet is equal to the maximum number of retransmissions of the channel. To determine whether to send a new packet or retransmit a packet on a previous channel, and if not, retransmit the original packet on the channel;
  • 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. If so, further processing is performed. If not , The original packet is retransmitted on this channel; when the timer on one channel of the transmitting end does not expire and a response frame is received, if it is an ACK signal, it is determined whether to transmit a new packet or retransmit a packet on another channel ;
  • the channel balance flag of the channel is 0, and the retransmission flag is 0;
  • the packet retransmission counter When a packet is sent once, the packet retransmission counter is 1, and each time the packet is retransmitted, the packet retransmission counter is incremented by 1. When the packet retransmission counter exceeds the maximum number of channel retransmissions, the packet is discarded. ; When the packet retransmission counter on a channel is greater than 1, the retransmission flag of the channel is 1;
  • the old packet on channel j is retransmitted on the channel i.
  • the channel balance flag bit on a channel j is 1, it is judged whether the retransmission counter of the old packet retransmitted on channel j is equal to the maximum number of retransmissions of the channel. If it is, a new packet is transmitted on channel i.
  • the retransmission counter of the old packet retransmitted on channel j is less than the maximum number of retransmissions of the channel, and the old packet on channel j is retransmitted on channel i;
  • the timer on channel i of the transmitting end does not expire and receives a response frame, if it is an MCK signal, it is determined 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 channel i.
  • a new packet is transmitted on channel i.
  • the retransmission counter of the packet on channel j is less than the maximum number of retransmissions of the channel, and the old packet on channel j is retransmitted on channel i; if the channel balance flag on channel i's previous channel j is 1.
  • the channel timer starts.
  • the timer expires and no response frame NACK or ACK is received from the receiving end, it is determined whether the retransmission counter of the channel i packet is less than the maximum number of retransmissions of the channel. If yes, the original packet is retransmitted on the channel i; if the retransmission counter of the channel i packet is equal to the maximum number of retransmissions of the channel, the packet is discarded, and j on the previous channel of the channel (if i> l, then j N) Whether the channel balance flag is 0. If so, determine whether the retransmission flag on channel j is 0. If so, transmit a new packet on channel i.
  • the output of the packet data at the receiving end strictly follows the order of the transmitting end; that is, the packet data Z should be output only if the packet data before Z has correctly arrived at the receiving end and has been output;
  • the packet is discarded at the transmitting end at this time; at this time, the packet X is output at the receiving end;
  • Packets 1 to 6 are transmitted in sequence on channels 1 to 6 first.
  • the receiving end when a packet is received correctly, an ACK is sent to the sending end on the corresponding channel. If a packet is not received correctly, a NACK is sent to the sending end on the corresponding channel. At the receiving end, packets 1, 2, 3, 5, 6 are received correctly, and packet 4 is not received correctly. The receiving end sends an ACK to the transmitting end at the corresponding channel 1, 2, 3, 5, 6 and sends a NACK at channel 4. To the sender.
  • the retransmission counter of packet 4 Since the maximum number of retransmissions of the channel is 3, the retransmission counter of packet 4 is already 3, so that packet 10 can be transmitted on channel 6.
  • Packets 7, 8, 9 are received correctly, and packets 11, 12, 13 can be transmitted on channels 1, 2, and 3.
  • Packet 4 has a retransmission counter of 3. Regardless of whether the sender receives NACK or ACK on channels 4 and 5, after transmitting packet 13 on channel 3, it transmits packets 14, 15 on channels 4, 5 in turn.
  • the packet 13 sent on the channel 3 is received correctly, but a new packet cannot be sent, and the packet 12 can be retransmitted again.
  • Packets 14, 15 sent on channels 4, 5 are received correctly. Since the retransmission counters for packets 10 and 12 are both 3, the maximum number of retransmissions for the channel has been reached. New packets 16, 17 are sent in sequence on channels 4, 5 . Since the retransmission counters of packets 10 and 12 are both 3, the maximum number of retransmissions of the channel has been reached. Channels 6, 1, 2, 3 send packets 18, 19, 20, 21 in sequence after channel 5 has transmitted packet 17.
  • the sender When packets 16, 17, 18 are received correctly, the sender sends packets 22, 23, 24 in sequence on channels 4, 5, and 6.
  • packets 1, 2, and 3 are correctly received, and packets 1, 2, and 3 can be output in sequence.
  • Packets 5 and 6 are received correctly. Because packet 4 is not received correctly and cannot be output, it must be placed in the buffer cache. Wait until packet 4 is received correctly, and output packets 4, 5 and 6 in turn. Packets 7, 8, 9 are received correctly, and packets 7, 8, 9 are output in sequence. Packet 11 is received correctly.
  • packet 10 is not received correctly, packet 10 is placed in the buffer cache. Wait until packet 10 is received correctly, and output packets 10, 11 in order. Packets 13, 14, 15 are received correctly. Because packets 12 are not received correctly, packets 13, 14, 15 are placed in the buffer cache. When packet 12 is received correctly, packets 12, 13, 14, 15 are output in sequence. Packets 16, 17, 18 are received correctly, and packets 16, 17, 18 are output in sequence.
  • Fig. 4 shows a block diagram of an example of an N channel (N is assumed to be 6) for implementing the present invention. This assumes 6 channels.
  • the packet data to be transmitted is first input into the first buffer device 401, the packet data is buffered and queued in the buffer device 401, and then enters the N-channel controller 102.
  • the structure of the N-channel controller 102 will be shown in FIG. 3 It is described in detail in the following.
  • the queued packet data is processed in the N-channel controller, it is selected whether to send new packet data on one channel or retransmit the original packet data or retransmit data on another channel.
  • Packet data is either sent to the first channel 403, sent to the receiving-end N-channel controller 409, or sent to one of the second channel 404 to the sixth channel 408, and sent to the receiving-end N-channel controller;
  • the packet data is sent on the first channel as an example.
  • the sent packet data is sent to the N-channel controller on the receiving end through the first channel 403. If it is received correctly, an ACK (ACKnowl edgment) signal is sent on the first channel 403.
  • ACK ACKnowl edgment
  • NACK Non-AC nowl edgment
  • a transmitting side requires retransmission data; correctly received data packet cache device 410 in the second buffer. Data is sequentially output from the second buffer 410.
  • the present invention proposes a no-wa it N-channe l ARQ error control method and device for a communication system, so that when one channel does not transmit new data, subsequent channels do not need to stop transmitting new data, to the greatest extent
  • the utilization rate of the channel is improved, and the transmission efficiency is greatly improved, and the receiver only needs to have a buffer that can hold N packet data.
  • the present invention significantly improves channel utilization and system throughput without increasing system complexity. That is, the buffer at the receiving end is not increased, the complexity of the system is not increased, and the order of sending packets is maintained, which greatly improves the throughput of the communication system.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Communication Control (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)

Abstract

L'invention porte sur un procédé instantané de gestion d'erreurs d'un canal N de système de télécommunications, et sur l'appareil à cet effet, ce qui s'obtient par fixation du drapeau d'attente de canal et du drapeau d'équilibrage de canal. Par contraste avec les techniques antérieures, l'invention accroît grandement la disponibilité des canaux et le débit du système sans en augmenter la complexité. On a seulement besoin d'ajouter un tampon côté réception contenant le numéro N du paquet de données.
PCT/CN2002/000216 2002-03-29 2002-03-29 Procede instantane de gestion d'erreurs d'un canal n de systeme de telecommunications et appareil a cet effet WO2003084115A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CNA028181182A CN1555631A (zh) 2002-03-29 2002-03-27 一种不同信道自动重发请求arq差错控制方法及装置
AU2002252931A AU2002252931A1 (en) 2002-03-29 2002-03-29 A no-wait n-channel arq error control method of communication system and the apparatus therefor
PCT/CN2002/000216 WO2003084115A1 (fr) 2002-03-29 2002-03-29 Procede instantane de gestion d'erreurs d'un canal n de systeme de telecommunications et appareil a cet effet
CNA028181158A CN1555630A (zh) 2002-03-29 2002-03-29 一种用于通信系统的no－wait N－cha nnelARQ差错控制方法及装置

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CN103327030B (zh) * 2013-07-10 2016-04-06 上海庆科信息技术有限公司 一种利用Wi-Fi报文长度进行信息传输的方法

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CN1275279A (zh) * 1997-08-19 2000-11-29 艾利森电话股份有限公司 一种多信道自动重发查询(arq)方法
WO2001037452A1 (fr) * 1999-11-17 2001-05-25 Motorola Inc. Procede de communication dote d'un systeme detecteur d'erreurs avec demande de repetition arret et pause multi-canaux et appareil

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CN1211378A (zh) * 1996-02-16 1999-03-17 艾利森电话股份有限公司 无线通信系统中用于信道分配的方法和装置
CN1275279A (zh) * 1997-08-19 2000-11-29 艾利森电话股份有限公司 一种多信道自动重发查询(arq)方法
WO2001037452A1 (fr) * 1999-11-17 2001-05-25 Motorola Inc. Procede de communication dote d'un systeme detecteur d'erreurs avec demande de repetition arret et pause multi-canaux et appareil

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CN101822088A (zh) * 2007-08-14 2010-09-01 株式会社Ntt都科摩 移动通信系统中的通信控制方法、信号生成装置以及包含该信号生成装置的无线通信装置

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