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Proceedings ArticleDOI

QoS provisioning for mobile and fixed wireless real time multimedia services

09 Dec 2009-pp 176-181
TL;DR: A new admission control policy and bandwidth reservation scheme for IEEE 802.16e networks has been proposed and results show that not only minimizes the new service flow blocking rate and the handover SF dropping rate, but also reduces the access delay of new real-time SF.
Abstract: In this paper, a new admission control policy and bandwidth reservation scheme for IEEE 802.16e networks has been proposed. Admission control policy and bandwidth reservation scheme are designed in such a way that desired quality of service is achieved. IEEE 802.16e standard did not specify any bandwidth reservation scheme that provides quality of service (QoS) support for real-time services, especially for handover real-time ones. The bandwidth reservation schemes, which were not designed for 802.16e system dedicatedly, could also be applied to it. But their performance is our main concern. Bandwidth reservation scheme is done based on probability of handover at mobile station and probability of call arrival at mobile station. And also admission control policy is designed for the same. Algorithm is designed to evaluate the performance of bandwidth reservation scheme. The simulation results show that not only minimizes the new service flow (SF) blocking rate and the handover SF dropping rate, but also reduces the access delay of new real-time SF.
Citations
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01 Jan 2007
TL;DR: In this paper, the authors provide updates to IEEE 802.16's MIB for the MAC, PHY and asso-ciated management procedures in order to accommodate recent extensions to the standard.
Abstract: This document provides updates to IEEE Std 802.16's MIB for the MAC, PHY and asso- ciated management procedures in order to accommodate recent extensions to the standard.

1,481 citations

Journal ArticleDOI
TL;DR: A Cross-layer framework is designed to efficiently allocate resources to various classes of traffic and it is seen that the proposed schemes offer better performance in contrast to the existing benchmarked schemes in terms of Throughput, Average Delay and Packet Loss Ratio (PLR).
Abstract: In a WiMAX network, the Medium Access Control (MAC) protocol deals with resource allocation to different types of traffic. The key components that ensure Quality of Service (QoS) guarantees in a WiMAX network include Call Admission Control (CAC), Bandwidth and Burst allocation. In this Paper, a Cross-layer framework is designed to efficiently allocate resources to various classes of traffic. CAC and Bandwidth allocation are dealt in the MAC layer, while Burst allocation in the PHYsical layer. The predominant goal of this work is to reduce delay and Information Element (IE) overheads by efficiently utilizing the available frame space. The History based CAC (HCAC) proposed in this paper deals with call acceptance based on the Contention Window (CW) values. The History based Bandwidth Allocation (HBA) scheme deals with allocating bandwidth based on Consumption and Equity measures. The proposed tightly coupled Delay Tolerance based Scheduler (DTS) and Bucket based Burst Allocator (BBA) allocate resources by prioritizing flows with least delay tolerance. It is seen that the proposed schemes offer better performance in contrast to the existing benchmarked schemes in terms of Throughput, Average Delay and Packet Loss Ratio (PLR).

4 citations

References
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01 Jan 2007
TL;DR: In this paper, the authors provide updates to IEEE 802.16's MIB for the MAC, PHY and asso-ciated management procedures in order to accommodate recent extensions to the standard.
Abstract: This document provides updates to IEEE Std 802.16's MIB for the MAC, PHY and asso- ciated management procedures in order to accommodate recent extensions to the standard.

1,481 citations


"QoS provisioning for mobile and fix..." refers background in this paper

  • ...Three basic types of SFs were defined in the standard [1]: • Provisioned SF • Admitted SF • Active SF A service flow may be provisioned but not immediately activated (sometimes called “deferred”)....

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  • ...In these cases, two-phase activation is skipped and the SF turns into active state directly without experiencing admitted state [1], When the free bandwidth is insufficient, the bandwidth requests of real-time SFs will be rejected....

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  • ...The bandwidth request and allocation mechanisms in the 802.16 standard specify that bandwidth is always requested on a connection basis and allocated on an MS basis [1][2]....

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  • ...In the two-phase activation model [1], provisioned SF or dynamically created SF experiences admitted state firstly....

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Journal ArticleDOI
TL;DR: Proponents are advocating WiMax (worldwide interoperability for microwave access), a technology based on an evolving standard for point-to-multipoint wireless networking that addresses the European Telecommunications Standards Institute's (ETSI) similar high-performance radio metropolitan area network (HiperMAN) broadband standard.
Abstract: When users want broadband Internet service, they're generally restricted to a T1, DSL, or cable-modem-based connection. However, these wireline infrastructures can be considerably more expensive and time consuming to deploy than a wireless one. In addition, rural areas and developing countries frequently lack optical fiber or copper-wire infrastructures for broadband services, and providers are unwilling to install the necessary equipment for regions with little profit potential. Many residents thus must do without broadband service. Wireless approaches could address this problem. Therefore, proponents are advocating WiMax (worldwide interoperability for microwave access), a technology based on an evolving standard for point-to-multipoint wireless networking. Carriers can use WiMax to provide wireless Internet service via transceivers to users' antennas. In addition to IEEE 802.16, WiMax addresses the European Telecommunications Standards Institute's (ETSI) similar high-performance radio metropolitan area network (HiperMAN) broadband standard.

177 citations


"QoS provisioning for mobile and fix..." refers background in this paper

  • ...In contrast, WiFi has a range of only several hundred feet and 3G cellular technology has a range of several thousand feet [4]....

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Journal ArticleDOI
TL;DR: A architecture of a two-tier CAC scheme for a differentiated services cellular wireless network is presented, based on the call-level and packet-level QoS considerations at both the wireless and wired parts of the network.
Abstract: This article presents a survey on the issues and the approaches related to designing call admission control schemes for fourth-generation wireless systems We review the state of the art of CAC algorithms used in the traditional wireless networks The major challenges in designing the CAC schemes for 4G wireless networks are identified These challenges are mainly due to heterogeneous wireless access environments, provisioning of quality of service to multiple types of applications with different requirements, provisioning for adaptive bandwidth allocation, consideration of both call-level and packet-level performance measures, and consideration of QoS at both the air interface and the wired Internet To this end, architecture of a two-tier CAC scheme for a differentiated services cellular wireless network is presented The proposed CAC architecture is based on the call-level and packet-level QoS considerations at both the wireless and wired parts of the network A performance analysis model for an example CAC scheme based on this architecture is outlined, and typical numerical results are presented

176 citations

Journal ArticleDOI
TL;DR: Adaptive resource allocation for multimedia quality of service (QoS) support in broadband wireless networks is examined and an effective and efficient measurement-based dynamic resource allocation scheme is proposed to meet the target handoff-dropping probability.
Abstract: Adaptive resource allocation for multimedia quality of service (QoS) support in broadband wireless networks is examined in this work. A service model consisting of three service classes with different handoff-dropping requirements is presented. Appropriate call-admission control and resource-reservation schemes are developed to allocate resources adaptively to the real-time service classes with a stringent delay bound. Moreover, we propose an effective and efficient measurement-based dynamic resource allocation scheme to meet the target handoff-dropping probability. The nonreal-time applications, serviced by the best-effort model, are supported. The system accommodates adaptive multimedia applications to further reduce the blocking and dropping probabilities of real-time applications. Based on a multidimensional model analysis, simulations are conducted to evaluate the system performance. The simulation results show that the proposed system can satisfy the desired QoS of multimedia applications under different traffic loads, while achieving high utilization.

160 citations