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The WiMAX standard specifies a metropolitan area broadband wireless access air interface. In order to support QoS for multimedia applications, various bandwidth request and scheduling mechanisms are suggested in WiMAX, in which a subscriber station can send request messages to a base station, and the base station can grant or reject the request according to the available radio resources. This article...
RSVP faces challenges from resource-engross and switching or thrashing when in handover process, especially when in group mobility and for multimedia applications. This paper proposed a scheme on seamless handover, developed a context transfer mechanism that can keep access routers and home agent informed of handover, AAA and QoS messages before anticipated handover. And a simplification to the HO...
The delay analysis and comparison of OFDM- TDMA and OFDMA using a flow control scheme under the QoS framework of IEEE 802.16 are conducted in this work. We investigate the maximum packet delay performance by deriving delay bounds for several multiaccess modes with different subcarrier/time-slot assignment and bit allocation schemes. The analytical delay bounds provide insights into the performance...
In this paper we have proposed a multimedia supported uplink scheduler for IEEE 802.16d OFDMA network, which includes a proportional fair (PF) scheduler in base station (BS) and earliest due date scheduler (EDD) in subscriber station (SS). The PF scheduler in the BS allocates the OFDMA resources to each SS according to their bandwidth request. The EDD scheduler in the SS utilizes the allocated resources...
In this paper, we propose a QoS guaranteed dynamic scheduler for IEEE 802.16d broadband wireless systems. The dynamic scheduler residing at the base station (BS) dynamically schedules the subscriber stations (SS) based on the present load of the system. The number of slots that has to be allotted to satisfy the QoS requirement of the applications running on each SS is estimated by the BS during each...
This paper proposes a mechanism that supports always best-connected (ABC) quality of service (QoS) to the application in a heterogeneous network. The heterogeneous network consists of IEEE 802.11e WLAN and IEEE802.16d WiMAX access networks. The user equipment (UE) in the network is enabled with both WLAN and WiMAX access capabilities. The generic virtual link layer (GVLL) is placed above the WLAN...
Integrated management architecture for FMC based on IMS/NGN is overviewed with WiBro which is a new and promising access technology that supports end-to- end QoS with SBLP. KT's integrated control platform for FMC services is described as well.
The following topics were dealt with: personal communications; indoor communications; mobile radio communications; MIMO communications; wireless MAN IEEE 802.16; QoS; radio resource management in beyond 3G systems; convergence of mobile and broadcast; UWB; cognitive networks; sensor networks; ad hoc networks; wireless cellular networks; interference avoidance; antennas; 4G systems; OFDM; MC-CDMA;...
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