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Wireless communication device, communication system, communication control method, and program

A technology of a wireless communication device and a control unit, applied in wireless communication, transmission system, error prevention/detection using a return channel, etc., capable of solving problems such as deterioration of throughput, increase of circuit scale at the receiving end, and inability to maintain the sequence of data packets, etc.

Inactive Publication Date: 2010-02-24
SONY GRP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, allowing multiple data paths leads to the following problem: the order of packets guaranteed by the MAC layer to the upper layer cannot be maintained at the sending destination when dynamically switching paths during packet transmission
As a result, the following problems arise newly: deterioration of throughput due to increase of overhead in packet header information and increase of circuit scale at the receiving end

Method used

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  • Wireless communication device, communication system, communication control method, and program
  • Wireless communication device, communication system, communication control method, and program
  • Wireless communication device, communication system, communication control method, and program

Examples

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no. 1 example

[0144] In the structure of the first embodiment described below, the access point AP does not change the sequence number set in the header for the packet relayed via the AP routing path. That is to say, with this setting, the original sequence number set by the packet source is not changed and reaches the destination. Therefore, the order of receiving packets can match the sending order of the source (sequence number set at the source) in the case of using the direct link path, and in the case of using the AP routed path, and by switching both paths, and Stored in the reordering buffer of the data receiving device in units of source addresses (SA).

[0145] The sequence number set at the data source is recorded in the MAC header of the packet. The access point AP as a relay point does not rewrite the sequence number, but simply copies and transmits it. The wireless communication device according to the present embodiment stores received packets in the reordering buffer so as...

no. 2 example

[0191] A second embodiment of the present invention will be described later. With the second embodiment, the access point AP rewrites the sequence number set in the packet header, which is the same as the system according to the prior art. This is the same Peer-to-Peer management process, i.e. the same as already existing 802.11.

[0192] When transmitting a data packet, STA1 as a source device manages a sequence number to be set in a packet header in units of a receiver address (RA) indicating a direct data receiver of the packet. This is also the same as the Peer-to-Peer management process, i.e. the same as already existing 802.11.

[0193] In the second embodiment, when performing path change, STA1 as a data transmitter sends a path change request to STA2 as a data receiver. STA2 receives the path change request from STA1, and in case of accepting the path change, transmits a path change response to STA1. The path change response sent by STA2 to STA1 stores the following...

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Abstract

The invention provides a wireless communication device, a communication system, a communication control method and a program. The wireless communication device includes: a control unit configured to control communication data; and memory configured to store communication data; wherein the control unit performs processing of setting a re-order buffer corresponding to a source address, for storing received data in increments of source address in the memory, storing received packets from a single data source in the re-order buffer corresponding to a source address, and arraying the packet order following sequence numbers set to the received packets.

Description

technical field [0001] The present invention relates to a wireless communication device, a communication system, a communication control method, and a program, for example, to a wireless communication device, a communication system, a communication control method, and a program that can process reception packets associated with changing communication paths, etc. Out of sequence. Background technique [0002] Recently, a wireless network conforming to a wireless LAN standard such as IEEE 802.00 has become more popular instead of a wired network because the wireless network has advantages such as a higher degree of freedom. As a large variety of applications begin to utilize wireless networks, there is a need to increase the throughput of the overall system. [0003] The wireless LAN standard (IEEE 802.11) specifies ad-hoc communication (in ad-hoc communication, communication is performed directly between wireless communication devices) and infrastructure mode communication t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W28/14H04W84/12H04L1/16
CPCH04L47/14H04L47/10H04W40/22H04L47/34H04L45/22H04W28/14H04W8/04
Inventor 内藤将彦伊东克俊板垣竹识
Owner SONY GRP CORP
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