Exponential backoff multiple access method in cooperation with network-assisted diversity

A technology of exponential backoff and auxiliary diversity, applied in advanced technology, electrical components, climate sustainability, etc., can solve the problems of high computational complexity, error-prone, inability to analyze correctly, and achieve high channel utilization and accuracy. High, energy-efficiency advantages

Inactive Publication Date: 2012-09-12
PLA UNIV OF SCI & TECH
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Problems solved by technology

However, the application of NDMA technology has two important dilemmas: 1) The number of conflicting nodes is generally obtained by estimation, which is error-prone; 2) When the number of conflicting nodes is large, due

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  • Exponential backoff multiple access method in cooperation with network-assisted diversity
  • Exponential backoff multiple access method in cooperation with network-assisted diversity
  • Exponential backoff multiple access method in cooperation with network-assisted diversity

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Embodiment Construction

[0029] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0030] Such as Figure 1 to Figure 4 Shown, a kind of exponential backoff multiple access method of the present invention combined cooperative network assisted diversity, this access method comprises the following steps:

[0031] Step 1: Assign the orthogonal superimposed pilot sequence to the node requesting access: when the node first requests to access the network, select any one of the orthogonal superimposed pilot sequences from the orthogonal superimposed pilot sequence library and assign it to the requesting node For the connected node, the orthogonal superimposed pilot sequence is used as the identity identification and channel estimation of the node; when the orthogonal pilot sequence in the orthogonal superimposed pilot sequence library is allocated, the node is denied access to the network; wherein , the orthogonally stacked pilo...

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Abstract

The invention discloses an exponential backoff multiple access method in cooperation with network-assisted diversity. The method comprises: (1) allocation of an orthogonal overlapping pilot sequence to nodes requesting for access, including: selecting an orthogonal overlapping pilot sequence and allocating the orthogonal overlapping pilot sequence to the node requesting for access to the network for the first time as the identity identification and channel estimation of the node; (2) the access channel backoff, including: monitoring the channel when a data packet in the network nodes needs to be transmitted, and subjecting the node to countdown backoff when the idle period of the monitored channel lasts for an interval length between distributed frames; and (3) data packet transmission, including: transmitting the data packet of the node needing to transmit the data packet in step (2) by the exponential backoff multiple access method in cooperation with network-assisted diversity. The exponential backoff multiple access method provided by the invention is high in throughput, reliability and efficiency, and has excellent burst traffic handling ability.

Description

technical field [0001] The invention relates to a medium access control method in a wireless network, in particular to an exponential backoff multiple access method combined with cooperative network auxiliary diversity. Background technique [0002] At this stage, the continuous informatization of people's work and lifestyle has led to continuous growth in the volume and rate of information communication, especially network communication. In the system of the communication service system, the wireless local area network with multiple access through hotspots will be more widely used. Media Access Control (MAC) technology is the key to the network providing good and fast data services. Media access technologies are usually divided into fixed allocation such as time division multiple access (TDMA), frequency division multiple access (FDMA) and code division multiple access (CDMA), on-demand allocation and random competition such as ALOHA series. The random contention access p...

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Application Information

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IPC IPC(8): H04W74/08
CPCY02D30/70
Inventor 蔡跃明皮旭荣杨炜伟管新荣魏士博
Owner PLA UNIV OF SCI & TECH
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