Intermedium control method capable of holding collaboration communication in wireless LAN

A wireless local area network and cooperative communication technology, applied in the field of media control that supports cooperative communication, can solve problems such as the inability to support physical layer cooperation, and achieve the effects of excellent performance improvement, increased saturated throughput, and reduced average delay

Inactive Publication Date: 2009-07-29
RUN TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its shortcoming is that the cooperation method of CoopMAC is only limited to the MAC layer, and cannot support the cooperation method of the physical layer.

Method used

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  • Intermedium control method capable of holding collaboration communication in wireless LAN
  • Intermedium control method capable of holding collaboration communication in wireless LAN
  • Intermedium control method capable of holding collaboration communication in wireless LAN

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Experimental program
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Embodiment Construction

[0025] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings: this embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following the described embodiment.

[0026] The overall working process of this embodiment is as follows: figure 1 , 2 shown. The technical terms (IEEE 802.11 standard) have the following meanings:

[0027] NAV (Network Allocation Vector): Network Allocation Vector

[0028] SIFS (Short InterFrame Space): short interframe space

[0029] DIFS (DCF InterFrame Space): DCF (distribution coordination function) interframe space

[0030] Backoff: Backoff process

[0031] ACK: IEEE 802.11MAC layer acknowledgment frame

[0032] 1) figure 1 is how CMAC works when there are no relay nodes. Specifically, aft...

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Abstract

The invention relate to a medium control method for supporting cooperated communication in wireless local area network, belonging to the wireless local area network transmission technology field. The invention judges whether a relay node is available by controlling frame triangle interaction, if yes, adopts triangle data transmission mode according to the advanced estimation to packet error rate simultaneously. The invention preserves the advantages of conventional MAC protocol, and increases the saturation throughput of whole network by cooperated supporting and cooperated communication when the packet error rate is high, reduces average time-delay and packet loss rate. The invention preserves the backoff process of IEEE802.11b, so achieves the same fairness performance asIEEE802.11b. the invention is used in wireless local area network, achieves the advantages of little protocol modification and excellent performance improvement. When the channel fading is obvious, the invention can effectively improve wireless network performance; and when the packet error rate is high, the invention can increase the throughput by about 17%, and reduce the packet loss rate to less than 1 / 10 of original value.

Description

technical field [0001] The invention relates to a method in the technical field of wireless local area network (WLAN) transmission, in particular to a medium control method for supporting cooperative communication in the wireless local area network. Background technique: [0002] For the application of cooperative communication in wireless networks, predecessors have done a lot of work. Part of the research work is the theoretical analysis of the physical layer, and gives the performance comparison of different cooperative communication protocols and coding methods in the fading channel; another part of the work is based on the traditional wireless LAN MAC layer protocol (IEEE802.11b). The concept of communication is introduced into the MAC layer protocol design to improve the performance of the wireless LAN. [0003] After searching the literature of the prior art, it was found that Pei Liu et al. published "CoopMAC: A Cooperative MAC For Wireless LANs" (CoopMAC: A Cooper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W28/06H04W74/08H04W80/02H04W84/12
Inventor 金奂王新兵徐友云
Owner RUN TECH CO LTD
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