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Data transmission method of multi-packet feedback opportunistic route based on ETX value under Rayleigh channels

A data transmission method and channel technology, which is applied in the data transmission field of multi-packet feedback opportunistic routing, can solve the problems of large overhead, opportunistic routing response overhead, etc., and achieve the effect of significant advantages, large performance advantages, and reduced feedback overhead

Active Publication Date: 2014-08-13
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, compared with traditional routing, opportunistic routing also has its disadvantages, that is, the overhead is too large. This is because opportunistic routing uses the forward transmission opportunities of multiple nodes, so it is necessary to establish a coordination mechanism among the nodes that have received the data packets. To know which node has the smallest ETX value among these nodes, so as to decide who initiates the next hop transmission, so the response overhead of opportunistic routing is relatively large

Method used

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  • Data transmission method of multi-packet feedback opportunistic route based on ETX value under Rayleigh channels
  • Data transmission method of multi-packet feedback opportunistic route based on ETX value under Rayleigh channels
  • Data transmission method of multi-packet feedback opportunistic route based on ETX value under Rayleigh channels

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specific Embodiment approach 1

[0023] The specific embodiment one, the data transmission method based on the multi-packet feedback opportunity routing of ETX value under the Rayleigh channel, it is realized by the following steps:

[0024] Step 1. The source node continuously sends N data frames to the Rayleigh channel, and all relay nodes receive M data frames from the N data frames respectively from the Rayleigh channel, and put the received M data frames into their respective cache; N is a positive integer; M is a positive integer less than or equal to N;

[0025] Step 2: The source node sends a confirmation frame after sending N data frames, and each relay node that contains M data frames in the N data frames in each buffer judges whether its own ETX value is smaller than the source node, and if the judgment result If yes, then broadcast feedback information, and perform step three; if the judgment result is no, then the relay node does not send feedback information, and perform step three;

[0026] Th...

specific Embodiment approach 2

[0056] Embodiment 2. The difference between this embodiment and the data transmission method based on the multi-packet feedback opportunistic routing of the ETX value under the Rayleigh channel described in Embodiment 1 is that in step 3, each relay node performs data frame transmission. During the forwarding process, if a data frame is sent more than once by a node, the value of the number of transmission times field of the data frame is increased by 1, and when the value of the number of transmission times field exceeds the preset value, the data frame is discarded.

specific Embodiment approach 3

[0057] Embodiment 3. The difference between this embodiment and the data transmission method of multi-packet feedback opportunistic routing based on ETX value under the Rayleigh channel described in Embodiment 2 is that the preset value is 7.

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Abstract

The invention relates to a data transmission method of a multi-packet feedback opportunistic route, in particular to the data transmission method of the multi-packet feedback opportunistic route based on an ETX value under Rayleigh channels. System feedback response expenses are lowered. The data transmission method of the multi-packet feedback opportunistic route is applied to an opportunistic route strategy in which a plurality of nodes (dozens of nodes to hundreds of nodes) exist in an area, Rayleigh fading channels with random channel parameters are formed among the nodes, the ETX value is calculated among the nodes through feedback information to choose a data package front transmission path. According to the data transmission method of the multi-packet feedback opportunistic route based on the ETX value under the Rayleigh channels, a data frame, a feedback frame and a response frame in the opportunistic route are provided, the feedback information of a plurality of packets is placed into the feedback frame to be fed back, and thus the system feedback response expenses are effectively lowered. The data transmission method of the multi-packet feedback opportunistic route based on the ETX value under the Rayleigh channels is applied to data transmission of the multi-packet feedback opportunistic route based on the ETX value under the Rayleigh channels.

Description

technical field [0001] The invention relates to a data transmission method for multi-packet feedback opportunity routing. Background technique [0002] When the wireless communication environment is relatively complex, electromagnetic waves will reach the receiver through multiple paths after reflection, refraction, and scattering, and the envelope of the received signal is described as obeying the Rayleigh distribution. In such a Rayleigh fading channel, traditional wireless multi-hop network routing protocols such as AODV and DSR perform poorly. In this case, the reliability of a single path is very poor, resulting in greatly increased packet loss rate and delay; the second is that traditional routing uses hop count or distance as a routing measure, which is not applicable in Rayleigh fading channels because the experienced hop count is small Two points or two geographically close points may cause large signal fading due to multipath effects, and the link condition is ver...

Claims

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Application Information

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IPC IPC(8): H04L1/16H04W40/02
Inventor 于启月高书莹孟维晓何晨光赵震
Owner HARBIN INST OF TECH
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