Radio packet communication method and wireless packet communication device

A technology of wireless grouping and communication method, which is applied in wireless communication, multiplexing communication, communication between multiple stations, etc., and can solve the problem of low probability of successful ACK packet transmission, reduced wireless channel utilization efficiency, and failure of data packet transmission And other issues

Active Publication Date: 2009-04-08
NIPPON TELEGRAPH & TELEPHONE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the more data packets received successfully, the lower the probability of successful transmission of ACK packets, which reduces the effect of improving throughput by sending data packets through space division multiplexing.
[0008] This is because, on the side of the sending station, there is no means for distinguishing the failure of receiving the data packet at the side of the receiving station, or the failure of receiving the ACK packet sent back from the receiving station. If the ACK packet cannot be received, it is judged as The data packet transmission fails, and the data packet is resent.
Therefore, when the transmission success probability of the ACK packet is low, although the data packet on the receiving side is successfully received, the probability of misidentification that the transmission of the data packet on the sending side has failed becomes high.
As a result, useless control such as retransmission of data packets that do not need to be retransmitted will be performed, reducing the utilization efficiency of the wireless channel.

Method used

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  • Radio packet communication method and wireless packet communication device
  • Radio packet communication method and wireless packet communication device
  • Radio packet communication method and wireless packet communication device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0039] figure 1 It is a flowchart showing the first embodiment of the present invention. figure 2 An operation example of the first embodiment of the present invention is shown.

[0040] Such as Figure 11 As shown, in addition to the data part, the data packet also includes: packet classification information; identification information (ID) of the destination wireless station; identification information (ID) of the sender wireless station; an additional sequence number; and the smallest sequence number among the sequence numbers of the plurality of data packets sent in parallel.

[0041] In addition, in this embodiment, one ACK packet that uniformly notifies multiple data packets of successful reception is defined as an extended ACK packet. Such as Figure 12 As shown, in the example (1), the extended ACK packet includes: packet type information, the ID of the destination wireless station (the sender wireless station of the data packet), and the sequence number of the s...

no. 2 approach

[0047] image 3 It is a flowchart showing the second embodiment of the present invention. Figure 4 An operation example of the second embodiment of the present invention is shown.

[0048] In this embodiment, one NACK packet that collectively notifies that multiple data packets have failed to receive is defined as an extended NACK packet. and Figure 12 The extended ACK packet shown is the same, and in example (1), the extended NACK packet includes packet type information, the ID of the destination wireless station (sender wireless station of the data packet), and the sequence number of the data packet that failed to be received. In addition, in example (2), instead of describing the sequence number of the data packet that failed to be received, a bitmap is used instead, and the bit corresponding to the sequence number of the data packet is set to a value corresponding to whether the reception is successful or not , to indicate that the reception of the packet failed. The...

no. 3 approach

[0058] Figure 5 It is a flowchart showing the third embodiment of the present invention. Figure 6 An operation example of the third embodiment of the present invention is shown.

[0059] In this embodiment, after carrier sense for a certain period of time, the transmitting wireless station 1 transmits four data packets (SN1 to SN4) in parallel on one wireless channel using space division multiplexing, and then parallelizes four data packets (SN1 to SN4) using space division multiplexing. Four data packets (SN5-SN8) are sent. That is, continuous parallel transmission of data packets is performed. For the continuous transmission of data packets, a program such as Group ACK which is being discussed in IEEE 802.11 TGe or the like can be used.

[0060] In addition, the extended ACK request packet and the extended ACK packet used in this embodiment are respectively presented as Figure 13 and Figure 12 structure shown.

[0061] exist Figure 5 Among them, the wireless stat...

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PUM

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Abstract

A plurality of data packets that contain sequence numbers, respectively, are transmitted simultaneously between two STAs by using a wireless channel and MIMO. An STA receiving the plurality of data packets transmitted simultaneously by using MIMO generates a single ACK packet containing information that corresponds to a sequence number of each data packet successfully received, and transmits the single ACK packet to a transmit-side STA without using MIMO. Thus, a ratio of successful ACK packet receptions to total receptions can be increased. An effect of improving throughput achieved by simultaneous transmission can also be ensured.

Description

technical field [0001] The present invention relates to a wireless packet communication method for transmitting a plurality of data packets in parallel by using space division multiplexing between wireless stations, in particular to a wireless packet communication method related to retransmission processing when data packets cannot be normally transmitted. Background technique [0002] For traditional wireless packet communication devices, only one used wireless channel is determined in advance, and before the data packet is sent, it is detected (carrier sense) whether the wireless channel is in an idle state, and a data is only sent when the wireless channel is in an idle state grouping. Through such control, multiple wireless stations can stagger their time and share a wireless channel ((1) International Standard ISO / IEC 8802-11 ANSI / IEEE Std 802.11, 1999 edition, Information technology-Telecommunications and information exchange between systems- Local and metropolitan ar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/56H04L29/00H04L1/00H04B7/26H04B7/04H04J99/00H04W74/08
Inventor 齐藤一贤熊谷智明大槻信也永田健悟相河聪太田厚蛭川明则
Owner NIPPON TELEGRAPH & TELEPHONE CORP
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