基于OFDM系統(tǒng)的隨機(jī)信道接入方案
A Random Access Mechanism Based on OFDM System
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摘要: 雙忙音多址信道接入(DBTMA)協(xié)議是一種信道利用率較高的無線局域網(wǎng)信道隨機(jī)接入控制方案。但是, 該協(xié)議的硬件實(shí)現(xiàn)復(fù)雜度較高。該文在對(duì)DBTMA協(xié)議進(jìn)行簡(jiǎn)單修改的基礎(chǔ)上,結(jié)合節(jié)能意識(shí)多址接入(PAMAS) 協(xié)議提出了一種基于OFDM系統(tǒng)的DBTMA信道接入系統(tǒng),并對(duì)此系統(tǒng)做了簡(jiǎn)要分析。分析結(jié)果顯示,該文提出的隨機(jī)信道接入系統(tǒng)的性能良好且實(shí)現(xiàn)方式簡(jiǎn)單。Abstract: A MAC protocol, termed Dual Busy Tone Multiple Access(DBTMA), is a random access mechanism with high channel utilization for WLAN. However, it is difficult to realize the protocol with hardware. This paper proposes a new random access mechanism based on OFDM system by making simple modification on DBTMA and integrating it with power awase multi-access protocol with signalling. Furthermore, the new protocol is analysed and the result indicates that the proposed random access system shows well performance and is easy to be realized.
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Deng J, Haas Z J. Dual busy tone multiple access (DBTMA): A new medium access control for packet radio networks[J].IEEE ICUPC98 International Conference on Universal Personal Communications. Florence, Italy 5- 9 Oct.1998, Vol.2:973-[2]Nee R V, Prasad R. OFDM Wireless Multimedia Communications [R]. Boston: Artech House Publishers, 2000.[3]Suresh Singh, Raghavendra C. PAMAS-power aware multiaccess protocol with signalling for ad hoc networks. ACM SIGCOMM Computer Communication Review, 1998, 28(3): 5 -26.[4]Tobagi F A, Kleinrock L. Packet switching in radio channels: Part Ⅱ-The Hidden terminal problem in carrier sense multiple-access and busy-tone solution. IEEE Trans. on Communications, 1975,COM-23(12): 1417- 1433.[5]謝希仁.計(jì)算機(jī)網(wǎng)絡(luò)(2版.大連:大連理工大學(xué)出版社,1996,第五章第四節(jié). -
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