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IEEE 802.11 WLAN支持語(yǔ)音與數(shù)據(jù)業(yè)務(wù)的自適應(yīng)傳輸方案研究

李長(zhǎng)樂(lè),  李建東,  蔡雪蓮

李長(zhǎng)樂(lè), 李建東, 蔡雪蓮. IEEE 802.11 WLAN支持語(yǔ)音與數(shù)據(jù)業(yè)務(wù)的自適應(yīng)傳輸方案研究[J]. 電子與信息學(xué)報(bào), 2005, 27(3): 359-363.
引用本文: 李長(zhǎng)樂(lè), 李建東, 蔡雪蓮. IEEE 802.11 WLAN支持語(yǔ)音與數(shù)據(jù)業(yè)務(wù)的自適應(yīng)傳輸方案研究[J]. 電子與信息學(xué)報(bào), 2005, 27(3): 359-363.
Li Chang-le, Li Jian-dong, Cai Xue-lian. A Study of Self-adaptive Transmission for Integrated Voice and Data Services over an IEEE 802.11 WLAN[J]. Journal of Electronics & Information Technology, 2005, 27(3): 359-363.
Citation: Li Chang-le, Li Jian-dong, Cai Xue-lian. A Study of Self-adaptive Transmission for Integrated Voice and Data Services over an IEEE 802.11 WLAN[J]. Journal of Electronics & Information Technology, 2005, 27(3): 359-363.

IEEE 802.11 WLAN支持語(yǔ)音與數(shù)據(jù)業(yè)務(wù)的自適應(yīng)傳輸方案研究

A Study of Self-adaptive Transmission for Integrated Voice and Data Services over an IEEE 802.11 WLAN

  • 摘要: IEEE 802.11標(biāo)準(zhǔn)中的MAC協(xié)議當(dāng)采用DCF和PCF時(shí)是一種隨機(jī)競(jìng)爭(zhēng)接入與輪詢相結(jié)合的協(xié)議。該文通過(guò)仿真在分析研究此MAC協(xié)議對(duì)語(yǔ)音、數(shù)據(jù)業(yè)務(wù)綜合傳輸性能的基礎(chǔ)上,提出了一種支持語(yǔ)音與數(shù)據(jù)業(yè)務(wù)的自適應(yīng)傳輸方案。仿真結(jié)果表明,在滿足語(yǔ)音業(yè)務(wù)最大允許時(shí)延的前提下,自適應(yīng)傳輸方案通過(guò)動(dòng)態(tài)、合理地調(diào)整協(xié)議參數(shù),可以提高數(shù)據(jù)業(yè)務(wù)的傳輸性能,從而增加網(wǎng)絡(luò)容量。特別地,本方案不需要改動(dòng)協(xié)議本身,易于實(shí)現(xiàn)。
    Abstract: The IEEE 802.11 standard MAC is a hybrid protocol of random access and polling when both DCF (Distributed Coordination Function) and PCF (Point Coordination Function) are used. On the base of the performance analysis of the MAC protocol for integrated data and voice transmission by simulation, this paper puts forward a self-adaptive transmission scheme to support multi-service over the IEEE 802.11 WLAN. The simulation results show that, on the premise of satisfying the maximum allowable delay of packet voice, the self-adaptive transmission scheme can improve the data traffic performance and increase the WLAN capacity through dynamic and appropriate adjustment of the protocol parameters. Especially, the scheme is easy to be realized for no change in the MAC protocol is needed.
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  • IEEE 802.11 WG. Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specification. 1999.[2]IEEE 802.11b WG. Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specification:High-Speed Physical Layer Extension in the 2.4 GHz Band. 1999.[3]IEEE 802.11a WG. Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specification:High-Speed Physical Layer in the 5 GHz Band. 1999.[4]Crow B P, Widjaja I, Kim J G, et al.. EEE 802.11 wireless local area networks. IEEE Communications Magazine, 1997, 35(9):116- 126.[5]Veeraraghavan M, Cocker N, Moors T. Support of voice services in IEEE 802.11 wireless LANs. INFOCOM 2001, Vol.1,Anchorage, 2001:488 - 497.[6]Prasad A R. Performance comparison of voice over IEEE 802.11 schemes. VTC99, Vol.5, Amsterdam, 1999:2636 - 2640.[7]Zahedi A, Pahlavan K. Capacity of a wireless LAN with voice and data services[J].IEEE Trans. on Communications.2000, 48(7):1160-[8]Zahedi A.[J].Pahlavan K. Voice and data integration on TCP/IP wireless networks. PIMRC97, Vol.2, Helsinki.1997,:-[9]Liu H H, Wu J L C. Packet telephony support for the IEEE 802.1lwireless LAN. IEEE Communications Letters, 2000, 4(9):286 - 288.[10]Suzuki T.[J].Tasaka S. Performance evaluation of integrated video and data transmission with the IEEE 802.11 standard MAC protocol. GLOBECOM99, Vol. IB, Rio de Janeiro.1999,:-[11]VisserM A.[J].Zarki M E. Voice and data transmission over an 802.11 wireless network. PIMRC95, Vol.2, Toronto.1995,:-[12]李長(zhǎng)樂(lè),李建東,蔡雪蓮,等.支持語(yǔ)音業(yè)務(wù)的IEEE 802.11WLAN性能分析.西安電子科技大學(xué)學(xué)報(bào),2003,30(7):1-5.
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出版歷程
  • 收稿日期:  2003-11-18
  • 修回日期:  2004-03-15
  • 刊出日期:  2005-03-19

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