A bandwidth reservation multiple access protocol for wireless ATM local networks

被引：1
作者：
Zhang Z. [1 ,2 ]
Habib I. [1 ,3 ]
Saadawi T. [1 ,4 ,5 ]
机构：
[1] Department of Electrical Engineering, City University of New York, City College, New York, NY
[2] City College, City University of New York
[3] Electrical Engineering Department, City College of New York
[4] Department of Electrical Engineering, City University of New York, City College
[5] Consortium Management Committee, ARL Federated Laboratories, Advanced Telecommunication and Information Research Program (ATIRP)
来源：
International Journal of Wireless Information Networks | 1997年 / 4卷 / 3期
关键词：
Dynamic channel assignment; TDMA; WATM LANs; Wireless access;
D O I：
10.1023/A:1018898009231
中图分类号：
学科分类号：
摘要：
A bandwidth reservation multiple access scheme (BRMA) is proposed to resolve contention and assign bandwidth among multiple users trying to gain access to a common channel such as in mobile users contending for resources in an ATM-based cellular network or a wireless local area network (LAN) with short propagation delays. The protocol is best suited to support variable-bit-rate (VBR) traffic that exhibits high temporal fluctuations. Each mobile user is connected end-to-end to another user over virtual channels via the base station that is connected to the wired ATM B-ISDN network. The channel capacity is modeled as a time frame with a fixed duration. Each frame starts with minislots, to resolve contention and reserve bandwidth, followed by data-transmission slots. Every contending user places a request for data slots in one of the minislots. If the request is granted by the base station through a downlink broadcast channel, the user then starts transmission in the assigned slot(s). The number of assigned slots varies according to the required quality of service (QoS), such as delay and packet loss probability. A speech activity detector is utilized in order to indicate the talkspurts to avoid wasting bandwidth. Due to its asynchronousnature, BRMA is rather insensitive to the burstiness of the traffic. Since the assignment of the minislots is deterministic, the request channels are contention-free and the data channels are collision-free. Hence, in spite of the overhead (minislots) in each frame, BRMA provides higher throughput than Packet Reservation Multiple Access (PRMA) for the same QoS, especially for high-speed systems. A better delay performance is also achieved for data traffic compared to Slotted Aloha reservation-type protocol PRMA. In addition, BRMA perform s be tier in term s of bandwidth efficiency than the conventional TDMA or the Dynamic TDMA, where speech activity detectors are very difficult to implement. © 1997 Plenum Publishing Corporation.
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页码：147 / 161
页数：14
相关论文
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