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Based on considering the CODEC frame duration, this paper proposes a superior uplink scheduling algorithm that can efficiently support multiple DTX VoIP CODECs over M-WiMAX, and be able to facilitate the uplink resource wastes during silence period and optimize the system VoIP capacity. The BS uplink resource allocation procedure is planned and adapted according to the reserved bit in the Bandwidth...
This paper proposes an efficient uplink scheduling algorithm that can perfectly support various VoIP CODECs with VAD/DTX/CNG in M-WiMAX considering the variants of silence duration between different voice users, solving the problems of uplink resources wastes and overwhelmingly large overhead that caused during silence period. In our proposed algorithm, efficient schemes is proposed to implement the...
This paper proposes a flexible uplink scheduling algorithm that can perfectly support Variable Multi-Rate Wide-Band (VMR-WB) VoIP services with multi-mode codec, solving the problems of uplink resources wastes, additional access delay and overwhelmingly large overhead. In our proposed algorithm, the BS adapts uplink resources assignment according to the reserved bit in the generic MAC header of IEEE802...
IEEE 802.16e standard specifies a system for combined fixed and mobile broadband wireless access. The voice-over-Internet protocol (VoIP) is an important application in IEEE 802.16e system. The algorithm proposed allocates the extra-bandwidth according to the flow's priority, the lagging flow is compensated according to the service it has lost, and the leading flow relinquish bandwidth proportional...
The voice-over-Internet protocol (VoIP) has attracted a great deal of attention in the field of wireless mobile networks. In this paper, we propose an improved ertPS scheduling algorithm for VoIP services in IEEE Std 802.16e system. It can solve both the problems waste of uplink resources caused by the UGS algorithm as well as MAC overhead and access delay caused by the rtPS algorithm, it also identify...
WiMax mesh networks based on IEEE 802.16 standard have promised to deliver high data rates over large areas and to be deployed easily. Optimum routing and scheduling of flows can do favor for capacity enlargement. The objective of this paper is to provide a routing-construction method with larger scale applicability and a concurrent transmission scheduling strategy to improve the performance during...
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