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Five service types with different priorities are defined to meet the QoS needs for different users, there are UGS, ertPS, rtPS, nrtPS, and BE on the IEEE 802.16 network. First, SS has to send connection request to BS before it is ready to transmit data. Then, SS can be allowed to transmit data white holding the allocated bandwidth from BS. Actually, BS utilizes CAC to identify whether enough bandwidth...
In this paper we investigate the application of IEEE 802.16-based broadband wireless access (BWA) technology to e-health system for rural areas. A qualitative comparison between third-generation wireless systems and the WiMAX technology is given. A survey on telemedicine services using traditional wireless systems is presented. The advantages of using WiMAX technology over traditional wireless systems,...
In this paper, we consider an uplink multiservice networks employing Orthogonal Frequency Division Multiple Access (OFDMA) for WiMAX networks. Since the OFDMA physical resource available for scheduling is frame by frame, the uplink scheduler located at base station (BS) must efficiently allocate available resources to the subscriber stations (SSs) in response to constant or bursty data traffic on...
The paper presents several factors that must be taken into account when designing an uplink scheduling algorithm. Many scheduling methods have been developed, but none of them was standardized yet and the implementation remains vendor specific. Using QualNet, the Strict Priority algorithm was simulated using two different network topologies. The way the uplink resources are allocated is analyzed for...
Frequency is amongst the most exclusive and most costly resources in wireless communication networks, especially, while considering the demands of broadband wireless access (BWA). In BWA, the management of frequency distribution and its effective utilization is of utmost importance. This research explores possible ways to ensure the most effective allocation of bandwidth resources and their best possible...
The IEEE 802.16 standard for wireless metropolitan area networks (WMANs) is defined to meet the need for wide-range broadband wireless access at low cost. The objective of this paper is to study how to exploit spectral reuse in resource allocation in an IEEE 802.16 mesh network, which includes routing tree construction (RTC), bandwidth allocation, time-slot assignment, and bandwidth guarantee of real-time...
This paper proposes a novel radio resource management scheme in the link adaptive WiMAX network and the hierarchical priority-queuing with weighted round-robin (HPWRR) scheduling algorithm for different traffic services. The radio resource management scheme can re-assign the burst profile and dynamically adjust the allocated bandwidth to the SSs to improve the resource utilization. Then, the HPWRR...
The IEEE 802.16 standard, which includes specification for the medium access control (MAC) and physical (PHY) layers, was designed to handle the requirements of different contemporary applications with diverse QoS requirements. IEEE 802.16 standard is equipped with signaling and bandwidth allocation algorithms that can accommodate many connections with a variety of QoS requirements at one subscriber...
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