擁塞控制衛(wèi)星PRMA-AC協(xié)議及性能分析
Performance of PRMA-AC: A Congestion Control PRMA Protocol for Satellite Communication
-
摘要: 衛(wèi)星通信中PRMA協(xié)議在負(fù)荷較重時由于終端競爭加劇會引起信道擁塞，而較長的傳播時延更進(jìn)一步加劇了擁塞引起的丟包。該文提出一種利用話音終端在通話的不同階段對信道資源的不同需求對終端進(jìn)行區(qū)分的方案PRMA-AC，據(jù)此引入一種接入控制機(jī)制，以減少信道競爭，提高系統(tǒng)服務(wù)質(zhì)量。文中給出了系統(tǒng)模型，對協(xié)議性能進(jìn)行了理論分析，獲得了新協(xié)議下的接入阻塞率、丟包率等性能指標(biāo)，最后通過仿真與幾種衛(wèi)星通信中常用的PRMA協(xié)議進(jìn)行了對比，證明了協(xié)議的性能。
-
關(guān)鍵詞:
- 衛(wèi)星通信;分組預(yù)約多組接入 (PRMA);分組預(yù)約;擁塞控制
Abstract: There is problem of channel congestion caused by the increased channel contention in satellite communication system with Packet Reservation Multiple Access (PRMA) protocol when the payload (amount of user terminals) goes up, and the long propagation delay worsens the situation with the result of increased packet drop rate. Considering that the requirement of the voice terminal for channel resource in different phase of communication progress is different, a new scheme of PRMA named PRMA-AC is proposed, which aims to decrease the channel contention and improve the quality of service by adopting an access control mechanism. Through theoretic analysis, the system model of the new scheme is given and performance parameters such as the access block probability and the packet drop probability are obtained. Finally, the scheme is compared with several other satellite PRMA protocols by simulation, and the result validates that the scheme is effective. -
Goodman D J, et al.. Packet reservation multiple access for localwireless communication[J].IEEE Trans. on Communications.1989,37(8):885-[2]Nanda S, Goodman D J, Timor U. Performance of PRMA: Apacket voice protocol for cellular systems[J].IEEE Trans.onVehicular Technology.1991, 40(3):584-[3]Del Re E, Fantacci R，et al.. Performance analysis of an improvedprma protocol for low earth orbit-mobile satellite systems[J].IEEETrans. on Vehicular Technology.1999, 48(3):985-[4]Lenzini L, Meini B, Mingozzi E. An efficient numerical methodfor performance analysis of contention mac protocols: acase study (PRMA++)[J].IEEE Journal on Selected Areas inCommunications.1998, 16(5):653-[5]Guntsch A. Analysis of the ATDMA/PRMA++ Protocol in amobile satellite system environment. IEEE Vehicular TechnologyConference, IEEE 46th, Atlanda,1996,Vol. 2: 1225 . 1229.[6]Wen Jyh-Horng, Wang Jee-Wey. A new protocol for wirelessvoice communications－non-collision packet reservation mutipleaccess[J].IEEE PIMRC95, Toronto.1995, 2:638-[7]李明遠(yuǎn), 朱瑩, 李建東, 郭梯云. 沖突消弱分組預(yù)約多址協(xié)議及其性能分析, 電子學(xué)報(bào), 1999, 27(4): 132 . 134.[8]Wang Lin, Wu Jianjun, Aghvami A H. Performance ofCDMA/PRMA with adaptive probability control in packet radionetworks, IEEE Vehicular Technology Conference, IEEE 49th,Houston, 1999, 3: 2044 . 2048. -
計(jì)量
- 文章訪問數(shù): 2435
- HTML全文瀏覽量: 128
- PDF下載量: 654
- 被引次數(shù): 0
下載:
