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The IEEE 802.16 mesh network is a promising next generation wireless backbone network. Under Coordinated Distributed Scheduling (CDS) mode, setting the holdoff time for nodes is essential to achieving good performances of medium access control layer scheduling in the networks. In this paper, we propose a dynamic scheme for setting holdoff time in IEEE 802.16 mesh mode with CDS. This scheme allows...
In order to achieve seamless handover for real-time applications in the IP Multimedia Subsystem (IMS) of the next-generation network, a multi-protocol combined handover mechanism is proposed. In this work, we combine SIP (Session Initiation Protocol), FMIP (Fast Mobile IPv6 Protocol) and MIH (Media Independent Handover) protocols by cross-layer design and optimize these protocols' signaling flows...
In WiMAX Mesh Networks, the waste problem of allocated minislots in the three-way handshaking procedure of Coordinated Distributed Scheduling (CDS) will degrade the end-to-end performance of traffic flows. In this paper, an enhanced mechanism which combines adaptive holdoff algorithm with regrant solution is proposed to deal with the above-mentioned problem. Moreover, a new grant horizon based on...
The IEEE 802.16 standard, also known as WiMAX, provides a mechanism to create a multi-hop mesh network. In order to improve the performance, multi-channel transmission can be adopted, however, a heavy scheduling scheme will affect network performance. This paper proposes a novel algorithm, called Layered Critical Path (LCP), which is a channel assignment scheme in a multi-channel single-transceiver...
WiMax mesh network provides a mechanism for creating multi-hop mesh, which can be deployed as high speed wide area wireless network. The routing and scheduling are two key factors that influence the performance of the WiMax mesh networks. In this paper, we introduce cross-layer design scheme and take both routing and scheduling into account in order to improve the performance. A centralized scheduling...
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