| 摘要: |
| 战术数据链（TDL）的作用就是在战场上能够更准确、有效和快速地传递战术情报。随着军事信息技术的发展，战场上的节点数量和传输数据呈现快速增长趋势。传统的战术数据链媒介访问控制（MAC）协议为了保证QoS，一般采用固定资源分配的多址访问算法，如TDMA，在面对大容量、高速率的需求时缺乏灵活性和有效性。为此，研究了基于统计优先级多址访问（SPMA）算法，提出了直接映射和差分趋势两种动态门限方法。仿真结果表明，动态门限比固定门限能够有效提高系统效率，更接近目标信道忙闲比设计，并且在相同负载下网络吞吐量也较固定门限高。 |
| 关键词: 战术数据链 媒介访问控制协议；基于统计优先的多址访问；动态门限 |
| DOI： |
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| 基金项目:中国电子科技集团公司数据链重点实验室开放基金资助项目(CLDL-20162306) |
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| Dynamic threshold based MAC protocol for tactical data links |
| SUN Wei,GUO Zhe,LI Xiang |
| (The 50th Research Institute of China Electronics Technology Group Corporation（CETC）,Shanghai 200331，China;The 50th Research Institute of China Electronics Technology Group Corporation（CETC）,Shanghai 200331，China;Data Link Key Laboratory of CETC,Xi′an 710068,China) |
| Abstract: |
| Tactical Data Links(TDLs) enable military communications to exchange tactical information in a precise,efficient and timely manner.With the development of military information technology,the data rate and the number of nodes participated in a network are experiencing explosive growth.Considering QoS guarantee,most traditional TDLs Medium Access Control(MAC) adopts fix resource assignment strategy,such as TDMA.Thus it lacks sufficient flexibility and cannot meet the demand of large capacity and high speed.A Statistical Priority-based Multiple Access(SPMA) based MAC protocol is described and two dynamic threshold methods of direct function mapping and difference trend are presented.According to the simulation result,dynamic threshold is more efficiency than fix threshold and also has better performance. |
| Key words: tactical data link(TDL) media access control(MAC) statistical priority-based multiple access(SPMA) dynamic threshold |
《电讯技术》编辑部 