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Energy Efficiency Priority Method for 802.11 Ad Hoc Networks Based on Cooperative MAC Protocol

A self-organizing network and MAC address technology, applied in the field of 802.11 wireless local area network communication, can solve problems such as lack of comprehensive consideration, and achieve the effect of optimizing transmission energy consumption, realizing energy efficiency, and optimizing wireless transmission rate

Active Publication Date: 2019-04-16
国网四川省电力公司电力应急中心 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing cooperative MAC protocols either aim to increase the data transmission rate, or consider how to reduce the energy consumption of data transmission, lack of comprehensive consideration of the two

Method used

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  • Energy Efficiency Priority Method for 802.11 Ad Hoc Networks Based on Cooperative MAC Protocol
  • Energy Efficiency Priority Method for 802.11 Ad Hoc Networks Based on Cooperative MAC Protocol
  • Energy Efficiency Priority Method for 802.11 Ad Hoc Networks Based on Cooperative MAC Protocol

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. In the field of LAN communication, in the RTS-CTS-DATA-ACK handshake protocol based on CSMA (Carrier Sense Multiple Access) / CA (Collision Avoidance, collision avoidance) in 802.11b / g, the source node i directly The time required to transmit a packet to destination node j is:

[0025]

[0026] where T SIFS : Short frame interframe interval; T DIFS : Long frame interframe interval; T RTS : Time required for RTS transmission; T CTS : Time required for CTS transmission; Time required for data transfer.

[0027] Because in 802.11b / g, RTS, CTS, and ACK are transmitted at a rate of 1Mbps, while the transmission rate of DATA is greater than or equal to 1Mbps. All nodes within its sensing range can correctly demodulate RTS, CTS, and ACK, but they may not be able to correctly extract DATA frames, because the transmission rate of DATA frames is ge...

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Abstract

The invention discloses a 802.11 self-organizing network energy efficiency precedence method based on a cooperation MAC protocol. The method comprises steps that a source node i selects that energy efficiency reaching a target node j satisfiers Eikj>Eij according to link information of next-hop neighborhood topology, wherein Eij is the energy efficiency transported by the source node i to the target node j, Eikj is the energy efficiency transported by the source node i to the target node j via a relay node k, and the relay node k with the maximum Eikj value sends an RRTS frame as the relay node and is provided with an RCTS overtime receiving timer; the target node j receives RTS information, replies a CTS according to the standard 802.11 mode and then enters a data receiving state; once receiving the RRTS information from the source node i, the relay node k sends an RCTS to the source node i, informs the source node i to transform the data via a relay, and stores a target MAC address in the RRTS. According to the invention, wireless transmission rate and transmission energy consumption are optimized via the relay cooperation technology, and the bit number of unit energy transmission is increased.

Description

technical field [0001] The invention relates to the field of 802.11 wireless local area network communication, in particular to an 802.11 ad hoc network energy efficiency priority method based on a cooperative MAC (MediaAccess Control, medium access control) protocol. Background technique [0002] The IEEE802.11a / b / g media access control protocol has a multi-rate physical layer, which can decide at what rate to transmit data according to the channel conditions. When the signal-to-noise ratio (SNR) is higher, a higher transmission rate can be used for data transmission. In order to take advantage of the multi-rate characteristics of the physical layer, a multi-rate routing algorithm at the network layer and a multi-rate access algorithm at the MAC layer are produced. Network layer multi-rate routing algorithm improves end-to-end throughput by using channel state information as a routing metric. However, the routing update delay and control overhead are large, which cannot a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W28/04H04W84/18H04B7/02
CPCH04B7/024H04W28/04H04W74/085H04W84/18Y02D30/70
Inventor 邓创王圣伟
Owner 国网四川省电力公司电力应急中心
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