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Method for implementing control protocol of random and periodical media access of radio network

A technology for media access control and protocol implementation, applied in the field of communication, can solve problems such as spectrum waste and increase overhead, and achieve the effect of high spectrum utilization.

Inactive Publication Date: 2011-11-16
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In terms of the design of the MAC protocol, many previous studies are based on an additional dedicated control channel in the network, and SU control signal exchange is performed on this channel; however, it is easy to cause spectrum waste in a network with a small number of channels.
[0004] After searching the prior art documents, it was found that "Synchronized MAC Protocol for Multi-hop Cognitive Radio Networks" published by Y.R.Kondareddy and P.Agrawal at the 2008 IEEE ICC conference aims to solve the control channel problem and the multi-channel hidden node problem, but In the specific design, it is assumed that each SU is equipped with two transceivers, which increases the overhead at the physical layer

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  • Method for implementing control protocol of random and periodical media access of radio network
  • Method for implementing control protocol of random and periodical media access of radio network
  • Method for implementing control protocol of random and periodical media access of radio network

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Embodiment Construction

[0029] 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.

[0030] The simulation environment parameters of this embodiment are set as follows: the channel transmission rate R is 2Mbps, and the monitoring time T of the network monitoring phase is h is 256μs, the mini-slot T of the network reporting phase ms is 64μs, the backoff time slot τ in the transmission reservation phase is 20μs, the length of RTS is 288 bits, the length of CTS is 240 bits, the duration of SIFS is 28μs, the duration of DIFS is 128μs, the contention window W is 32, and the number of SUs in the cognitive radio network is 5 . The busy / idle time of the PU ...

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Abstract

The invention relates to a method for implementing the control protocol of the random and periodical media access of a radio network, comprising the following steps: step 1, after network initialization, each SU synchronously and periodically repeats one work period Tpointed by OP-MAC; step 2, in the OP-MAC work period, each SU monitors signal paths in the network firstly; step 3, each SU respectively reports the results of the monitored signal channels so that all SU in the network can share the monitored information of idle signal channels; step 4, SU competition is carried out, and available idle signal channels are reserved; and step 5, each SU which succeeds in the competition in the transmission reservation stage transmits data. The network capability of the OP-MAC protocol of the invention in the cognitive radio network is obviously superior to CO-MAC and R-MAC.

Description

technical field [0001] The invention relates to a method in the technical field of communication, in particular to a method for realizing a radio network random periodic media access control protocol. Background technique [0002] The penetration of wireless devices and the rapid growth of wireless services continue to place higher demands on limited spectrum resources. In fact, most of the frequency bands suitable for terrestrial wireless communications have already been allocated to licensed existing users. In a traditional static spectrum allocation network, each frequency band / channel is dedicated to a service and a licensed user of the service. However, the current static spectrum allocation has caused a lot of spectrum waste. The US Federal Council pointed out that more than 60% of the licensed spectrum below 6 GHz has not been utilized or has not been rationally utilized. Cognitive Radio (Cognitive Radio) is an effective technology to solve the low spectrum utilizat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W24/00H04W28/26H04W74/08H04W80/00
Inventor 王新兵薛东岳顾深甘小莺徐友云
Owner SHANGHAI JIAO TONG UNIV
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