计算机工程与应用
計算機工程與應用
계산궤공정여응용
COMPUTER ENGINEERING AND APPLICATIONS
2013年
7期
76-80
,共5页
潘鹏%郭达伟%刘航%王鹏
潘鵬%郭達偉%劉航%王鵬
반붕%곽체위%류항%왕붕
Ad hoc网络%时分多址%媒介接入控制%Q-TDMA协议
Ad hoc網絡%時分多阯%媒介接入控製%Q-TDMA協議
Ad hoc망락%시분다지%매개접입공제%Q-TDMA협의
Ad hoc network%Time Division Multiple Access(TDMA)%Media Access Control(MAC)%Queue-length based TDMA(Q-TDMA)
针对 IEEE 802.11在高竞争下吞吐量低,以及 TDMA 协议在低负载下吞吐量低的问题,提出了一种新的 TDMA MAC 协议:Q-TDMA.结合 TDMA 协议可以保证节点在每个周期内有一个发送机会,而同步 CSMA/CA 机制可以解决隐藏终端和暴露终端的问题,Q-TDMA 协议要求节点根据本身的队列长度来竞争复用时隙.仿真实验结果表明,Q-TDMA提高了网络吞吐量,降低了端到端的延迟.
針對 IEEE 802.11在高競爭下吞吐量低,以及 TDMA 協議在低負載下吞吐量低的問題,提齣瞭一種新的 TDMA MAC 協議:Q-TDMA.結閤 TDMA 協議可以保證節點在每箇週期內有一箇髮送機會,而同步 CSMA/CA 機製可以解決隱藏終耑和暴露終耑的問題,Q-TDMA 協議要求節點根據本身的隊列長度來競爭複用時隙.倣真實驗結果錶明,Q-TDMA提高瞭網絡吞吐量,降低瞭耑到耑的延遲.
침대 IEEE 802.11재고경쟁하탄토량저,이급 TDMA 협의재저부재하탄토량저적문제,제출료일충신적 TDMA MAC 협의:Q-TDMA.결합 TDMA 협의가이보증절점재매개주기내유일개발송궤회,이동보 CSMA/CA 궤제가이해결은장종단화폭로종단적문제,Q-TDMA 협의요구절점근거본신적대렬장도래경쟁복용시극.방진실험결과표명,Q-TDMA제고료망락탄토량,강저료단도단적연지.
@@@@Queue-length based Time Division Multiple Access(Q-TDMA)is a new Media Access Control(MAC)protocol. Its purpose is to resolve poor throughput for IEEE 802.11 with high competition and TDMA with low loads. TDMA protocol can guarantee that each node has a chance to send in a cycle, while synchronous Carrier Sense Multiple Access with Collision Avoid-ance(CSMA/CA)mechanism can solve the hidden terminal and exposed terminal problem. Combining with the advantages of TDMA and synchronous CSMA/CA mechanism, Q-TDMA demands that node needs to contend to access channel based on its’own queue length. According to the simulation results, Q-TDMA improves the network throughput and reduces end to end delay.
