Threaded Topology Transparent Multiple Access Protocol for MIMO Link Ad Hoc Networks

CHEN Dan; LI Jin-dan; YAN Mao-de; LI Jian-dong; LI Chang-le

doi:10.3969/j.issn.0372-2112.2015.06.031

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Threaded Topology Transparent Multiple Access Protocol for MIMO Link Ad Hoc Networks

更新时间：2025-07-16

- Threaded Topology Transparent Multiple Access Protocol for MIMO Link Ad Hoc Networks
- Acta Electronica Sinica Vol. 43, Issue 6, Pages: 1241-1248(2015)
- 作者机构：
  
  1. 长安大学电子与控制工程学院,陕西,西安,710064
  2. 西安电子科技大学综合业务网络理论及关键技术国家重点实验室,陕西,西安,710071
  3. 长安大学电子与控制工程学院,陕西,西安,710064
  4. 西安电子科技大学综合业务网络理论及关键技术国家重点实验室,陕西,西安,710071
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China (No.61231008);Industrial Science and Technology Research and Development Project of Shaanxi Province (No.2014K05-59);Fundamental Research Funds for the Central Universities (No.2014G2320006, No.2014G3322008, No.310832151089)
- DOI：10.3969/j.issn.0372-2112.2015.06.031
  CLC： TN915.4
- Published：2015
- 稿件说明：
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CHEN Dan, LI Jin-dan, YAN Mao-de, et al. Threaded Topology Transparent Multiple Access Protocol for MIMO Link Ad Hoc Networks[J]. Acta Electronica Sinica, 2015, 43(6): 1241-1248.
DOI：

CHEN Dan, LI Jin-dan, YAN Mao-de, et al. Threaded Topology Transparent Multiple Access Protocol for MIMO Link Ad Hoc Networks[J]. Acta Electronica Sinica, 2015, 43(6): 1241-1248. DOI： 10.3969/j.issn.0372-2112.2015.06.031.

摘要

针对MIMO链路Ad Hoc网络

提出了支持MIMO的线程化拓扑未知多址接入协议(MIMO-T-TTMA).MIMO-T-TTMA将时间扩展多址接入(TSMA)协议和时分多址接入(TDMA)协议以时间交替的方式相结合

进而为网络中节点分配时隙.在MIMO-T-TTMA中

每个节点被分配了若干时隙

每个分配时隙中

节点通过交互请求发送/允许发送(RTS/CTS)分组来确定发送使用的数据流数

而当RTS/CTS交互失败或者当前时隙为未分配时隙时

节点仍依一定的概率发送一个数据流

以提高网络的吞吐量.为了评估协议的性能

推导了MIMO-T-TTMA的吞吐量.数值结果表明

与已有的协议相比

MIMO-T-TTMA在节点度较大时具有较高的吞吐量

并且

吞吐量随节点度的变化比较平稳

因此

MIMO-T-TTMA适用于拓扑常发生剧烈变化的Ad Hoc网络.

Abstract

A MIMO-aware threaded topology transparent multiple access(MIMO-T-TTMA) protocol is proposed for MIMO link ad hoc networks.MIMO-T-TTMA utilizes the protocol threading technique and combines a time spread multiple access(TSMA) protocol and a time division multiple access(TDMA) protocol in time-sharing mode.In MIMO-T-TTMA

each node in the networks is assigned a few slots.In each of its assigned slot

node determines the number of data streams to be transmitted by exchanging request to send/clear to send(RTS/CTS) packets.While the exchange of RTS/CTS fails or the slot is a non-assigned slot

the node also transmits one stream according to some probability in order to improve the throughput.To evaluate the performance

the throughput of MIMO-T-TTMA is deduced by theoretical analysis.Numerical results show that

compared with existing protocols

MIMO-T-TTMA has higher throughput when node degree is relatively large

moreover

the throughput is more stable with the changes of node degree

therefore

MIMO-T-TTMA applies to the ad hoc networks whose topologies vary significantly.

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