A Zone-based bandwidth allocation protocol in WiMAX multi-hop relay networks

Mai, Yi-Ting; Yang, Chun-Chuan; Chen, Jeng-Yueng; Chen, Kuo-Yang

doi:10.1109/icoin.2011.5723189

Cited by 5 publications

(2 citation statements)

References 14 publications

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“…Mai et al [25] have proposed zone based bandwidth allocation (ZBA) for relay stations in which the bandwidth is allocated to relay stations based on the probability of users that visit the relay stations. However, the ERR and ZBA can be considered only when excess of resource is available at the BS and with lesser number of hops between BS and MS.…”

Section: Related Workmentioning

confidence: 99%

“…Although many works [17][18][19][20][21][22][23][24][25][26] have been proposed to increase the throughput and extend the coverage with relay based networks, the target performance is achieved with either additional resource (bandwidth) at RS. Further, no works have been proposed to suggest an appropriate multihop contention mechanism in WiMAX relay network based on the environment.…”

Section: Related Workmentioning

confidence: 99%

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Investigation on Mutual Contention Bandwidth Request Mechanisms in Two-Hop Relay Network with ITU-R Path Loss Models

Anbazhagan

Nakkeeran

2013

ISRN Communications and Networking

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The performance of two-hop contention based bandwidth request (BR) mechanism for WiMAX relay networks is investigated under ITU-R path loss models. In conventional WiMAX systems, the mobile stations (MS) update their contention window irrespective of their transmission failures. Those systems update their contention window on collision and due to channel error or unavailability of bandwidth. Further, these failure models have been suggested for single hop networks. The failure model in two-hop systems becomes complex since it may include additional failure events such as improper detection of codes and channel error due to varying path loss. Interestingly, these failure events (collision, channel error, unavailability of bandwidth, and improper detection of codes) do not occur evenly for both hops of a link. Hence, to set the contention window effectively, unique failure models are developed by considering the characteristics of BR mechanism and hop at which the BR is performed. In the proposed system, the two-hop BR is carried out with all combinations of message and code bandwidth request schemes. Among them, the messagecode BR mechanism performs better under suburban fixed and outdoor to indoor or pedestrian environment, and code-code BR scheme performs better for vehicular environment.

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Section: Related Workmentioning

confidence: 99%