802.15.4规范的增强型保障时隙通信协议的研究  

An enhanced guaranteed time slot protocol based on 802.15.4 standard

作　　者：姚道远[1] 邓瀚林[1] 黄河清[1] 沈杰[1] 刘海涛[1] 

机构地区：[1]中国科学院上海微系统与信息技术研究所,上海200050

出　　处：《高技术通讯》2010年第8期803-809,共7页Chinese High Technology Letters

基　　金：863计划(2007AA01Z2A8);中科院知识创新工程重要方向性项目(KGCX2-YW-120)资助

摘　　要：针对IEEE 802.15.4-2006标准的保障通信时隙(GTS)分配机制存在系统容量低和传输时延大的不足,提出了增强型的GTS方案。该方案设计了新的GTS分配算法,以支持端设备之间的直接端对端通信;将原标准中的单信道分配算法扩展为多信道分配算法,以充分利用物理层规范提供的多信道资源;设计了GTS通信维护算法,以增强系统的可靠性。理论分析和仿真结果均表明,该方案可将相邻端对端设备之间的平均传输时延减少到原标准的1/3,系统容量最大可以扩展2N倍(N为系统数据信道数),且增加的网络开销可接受。In consideration of the IEEE 802.15.4-2006 shortages of low system capacity and long delivery latency in guaranteed time slot （GTS） allocation, the paper proposes an enhanced GTS （EGTS） scheme. The EGrlS scheme not only designs a new GTS allocation algorithm to support the peer to peer communication between two adjacent end devices, but also utilizes available multi-channel resources specified in the physical layer specification and designs a GTS conservation algorithm to increase the system reliability. The results of theoretical analysis and simulation show that when using the EGTS the communication latency between two adjacent end devices can be decreased to one third of the former specification and the capacity can be expended 2N（ N is the number of system data channels） times with acceptable incremental overheads.

关 键 词：802.15.4 保障通信时隙(GTS) P2P通信 通信时延 系统容量 

分 类 号：TN915.04[电子电信—通信与信息系统]