摘要
针对半双工IEEE802.15.4无线传感网络中有效数据速率不高和隐藏节点问题,提出了一种新的基于IEEE802.15.4的单信道全双工MAC协议,设计了单信道全双工帧结构和通信机制.根据负载数据包存储情况动态决定单信道全双工通信时长,获得平均129%网络吞吐量增益,大大提高了有效数据传输速率.全双工的工作机制可以抑制隐藏节点问题,本协议提出动态共享同步随机回退机制,减少了握手请求并增加了单信道全双工通信机会,进一步抑制了隐藏节点导致的碰撞问题,降低了系统误比特率,提高了网络可靠性.
To deal with the inefficient data rate and hidden node issue in wireless sensor network based on half duplex IEEE802. 15.4, a single channel full duplex IEEE802. 15.4 MAC protocol was put forward. We designed the frame structure and transmission mechanism of single channel full duplex communication. It decided each period of single channel full duplex communication dynamically according to the situation of data packet load storage, with which we achieved 129% average throughput gain and greatly improved data rate. The single channel full duplex communication can suppress hidden node issue. This protocol provided a mechanism called shared random back-off, which decreased the hand shake request times and added single channel full duplex communication chance. With this protocol, we further suppressed the collision status of hidden node issue, reduced the bit error rate and achieved a better network reliability.
出处
《微电子学与计算机》
CSCD
北大核心
2014年第1期83-87,共5页
Microelectronics & Computer
基金
国家高技术发展计划("八六三"计划)(2011AA010404)
重大专项(2011ZX01034-001-001-2)
关键词
单信道全双工
802
15
4
自干扰抵消
同步随机回退
single channel full duplex
802.15.4
self-interference cancellation
shared random back-off
