改进的6LoWPAN分片地址压缩方案  

Improved scheme of fragment address compression for 6LoWPAN

作　　者：李占波[1] 李东秀[1] 

机构地区：[1]郑州大学信息工程学院,河南郑州450001

出　　处：《计算机工程与设计》2016年第4期877-881,共5页Computer Engineering and Design

摘　　要：针对6LoWPAN网络物理层MTU的限制,提出一种报文头部压缩方案分片报头压缩。6LoWPAN的压缩方案一直考虑的是对IPv6头部字段进行压缩,但数据报在适配层传输时,多以分片的形式进行传输,除第一分片外,后续分片头部Mesh Delivery字段也要记录适配层源地址和目的地址,极大增加了网络的负载。为此,分开处理第一分片和后续分片,对后续分片,通过增加分片标记和分片头部冗余的地址字段映射表及其它数据结构,利用分片标记替代分片报文Mesh Delivery字段中较长的地址字段,结合现有的IPHC报头压缩技术,进一步对报头进行压缩。性能分析结果表明,当网络负载和传输数据包较大时,从数据包投递率、平均吞吐量、平均时延的测试可以看出该方法较原来的IPHC协议表现更优。To solve the limitation of MTU in 6LoWPAN networks,apacket header compression scheme fragment header compression was proposed.6LoWPAN compression scheme focuses on compressing the header field,but when a datagram transmits in adaptation layer,many are in the form of fragmentation,besides the first fragment,subsequent subdivisions heads also need to record adaptation layer source and destination addresses,which greatly increases the network load.To solve the problem,the shard tags,shard map and other data structures of the head were increased,the shard tag was used to replace Mesh Delivery fragment message header,combined with the existing IPHC header compression technology,the header was further compressed.Performance analysis show that when the network load and data packets are large,the proposed method performs better than the original agreement in terms of packet delivery ratio,average throughput and average delay test.

关 键 词：6LoWPAN 报头压缩 分片压缩 映射表 适配层 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]