An SDMA protocol for wireless multimedia networks

Yin, Hujun; Liu, H.

doi:10.1109/icassp.2000.861003

Cited by 5 publications

(6 citation statements)

References 4 publications

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“…The space-time packet scheduling problem have been noted by Yin and Liu [8,9]. However, there was no discussion on optimal scheduling nor scheduling algorithms proposed.…”

Section: Introductionmentioning

confidence: 99%

Optimal space-time packet scheduling for reservation ALOHA networks

Zhang

2001

Conference Record of Thirty-Fifth Asilomar Conference on Signals, Systems and Computers (Cat.No.01CH37256)

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This paper considers reservation ALOHA systems with Space Division Multiple Access (SDMA). Such systems dynamically assign time slots to accessing users. Due to SDMA, multiple users may occupy the same time slot and their relative spatial properties significantly affects the throughput of that slot and, hence the throughput of the system. This paper builds a model of the dependence of the system throughput on the co-slot assignment. The model directly suggests optimal packet scheduling that maximizes the system throughput. Since the optimization is exponentially complex, this paper also proposes and compares several greedy algorithms based on different heuristics.

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“…The space-time packet scheduling problem have been noted by Yin and Liu [8,9]. However, there was no discussion on optimal scheduling nor scheduling algorithms proposed.…”

Section: Introductionmentioning

confidence: 99%

Optimal space-time packet scheduling for reservation ALOHA networks

Zhang

2001

Conference Record of Thirty-Fifth Asilomar Conference on Signals, Systems and Computers (Cat.No.01CH37256)

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“…Some heuristic methods to consider the impact of antennas on resource allocation are presented in [16] and [17]. However, adaptive resource allocation in the context of OFDM or other multiple access schemes has predominantly been studied independently from intra-cell user spatial separation.…”

Section: Introductionmentioning

confidence: 99%

Adaptive resource allocation in SDMA-based wireless broadband networks with OFDM signaling

Koutsopoulos

Tassiulas

Proceedings.Twenty-First Annual Joint Conference of the IEEE Computer and Communications Societies

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Abstract-The increasing popularity of wireless broadband access in local and wide area networks is the main expression of the need for flexible and ubiquitous wireless connectivity. In order to satisfy user resource requirements in the presence of volatility of the wireless medium, sophisticated multiple access and adaptation techniques are required, which alleviate channel impairments and increase system throughput. The use of multiple antennas at the base station allows intra-cell channel reuse by multiple spatially separable users through Space Division Multiple Access (SDMA) and hence enhances cell capacity. However, the employment of antennas in the physical layer raises significant issues in medium access control (MAC) layer. In this paper, we investigate the impact of antenna arrays on MAC layer channel allocation in the context of Orthogonal Frequency Division Multiplexing (OFDM), which is the predominantly proposed signaling scheme for wireless broadband access. We propose an algorithm to allocate channels to users based on their spatial separability properties, while appropriately adjusting beamforming weights and transmission rates for each user in a channel. The unified consideration of such adaptive techniques yields significant throughput benefits.

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“…However, the employment of antenna arrays at the physical layer affects resource allocation methods and MAC protocols of higher layers. With respect to the impact of SDMA on resource allocation, some heuristics for time slot assignment to users in a SDMA/TDMA system are proposed in [2] and [3].…”

Section: Introductionmentioning

confidence: 99%

Efficient media access protocols for wireless LANs with smart antennas

Ren

Koutsopoulos

Tassiulas

2003 IEEE Wireless Communications and Networking, 2003. WCNC 2003.

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Abstract-The use of smart antennas in extending coverage range and capacity of wireless networks dictates the employment of novel media access control protocols, with which the base station (BS) or access point (AP) provides access to users by learning their locations. We consider the class of protocols that employ beamforming and use contention-based or contentionfree polling methods to locate users residing in or out of coverage range of the AP. Such protocols allow rapid media access and can be embedded in existing MAC protocols.

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An SDMA protocol for wireless multimedia networks

Cited by 5 publications

References 4 publications

Optimal space-time packet scheduling for reservation ALOHA networks

Optimal space-time packet scheduling for reservation ALOHA networks

Adaptive resource allocation in SDMA-based wireless broadband networks with OFDM signaling

Efficient media access protocols for wireless LANs with smart antennas

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