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This paper studies QoE (Quality of Experience) enhancement of audio-video IP transmission over the uplink channel, i.e., from subscriber stations (SSs) to the base station (BS), in the IEEE 802.16 BE service. We assume two types of capacity allocation schemes for uplink and downlink burst durations: static and adaptive. Furthermore, we introduce a piggyback request mechanism for uplink bandwidth requests...
IEEE 802.16 (WiMAX) is considered as one of the most promising wireless access technologies supporting high-capacity and long-distance communications as well as user mobility. A problem that should be addressed in the context of multi-access communications is the efficient accommodation of traffic requests to the downlink subframe. The allocation operation in downlink sub-frame is not standardized,...
In wireless networks, the definition of fair resource allocation is ambiguous because the wireless channel condition is not constant over time and location. Two main ways to define fair resource allocation are: by number of allocated service time units per user, temporal fairness, or the number of transmitted bytes per user, throughput fairness. In wireless broadband networks i.e., IEEE 802.16e Mobile...
IEEE 802.16 technology has emerged as a competitive alternative to wireline broadband access solution. IEEE 802.16 can provide quality of service (QoS) guarantees for heterogeneous classes of traffic with different QoS requirements. The standard, however, leaves open the resource management and scheduling issues, which are crucial components to guarantee QoS performance. The main objective of this...
Most of IEEE 802.16e resource allocation proposals only focus on how to allocate the resources to meet QoS parameters such as throughput, delay, and delay-jitter. As described in the standard, the mapping from the allocation into downlink subframe for each burst needs to be in a rectangular shape. The rectangular mapping problem is a variation of a bin or strip packing problem, which is known to be...
The IEEE 802.16e standard provides five different scheduling services to meet the QoS requirement of multimedia applications and this paper investigates one specific scheduling service, i.e. rtPS scheduling. In order to relieve the serious MAC overhead problem in WiMAX system, an efficient scheduling algorithm for the rtPS services has been proposed in this paper. Also the algorithm has been implemented...
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