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Quality-of-Service Provisioning and Efficient Resource Utilization in CDMA Cellular Communications
"... Abstract—One of the major challenges in supporting multimedia services over Internet protocol (IP)-based code-division multiple-access (CDMA) wireless networks is the quality-of-service (QoS) provisioning with efficient resource utilization. Compared with the circuit-switched voice service in the se ..."
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Abstract—One of the major challenges in supporting multimedia services over Internet protocol (IP)-based code-division multiple-access (CDMA) wireless networks is the quality-of-service (QoS) provisioning with efficient resource utilization. Compared with the circuit-switched voice service in the second-generation CDMA systems (i.e., IS-95), heterogeneous multimedia applications in future IP-based CDMA networks require more complex QoS provisioning and more sophisticated management of the scarce radio resources. This paper provides an overview of the CDMA-related QoS provisioning techniques in the avenues of packet scheduling, power allocation, and network coordination, summarizes state-of-the-art research results, and identifies further research issues. Index Terms—Code-division multiple-access (CDMA), intercell coordination, multimedia services, packet scheduling, power allocation, quality-of-service (QoS), soft handoff. I.
MR-FQ: A fair scheduling algorithm for wireless networks with variable transmission rates. Simulation: Transactions of The Society for Modeling and Simulation
- International
, 2005
"... Abstract — Wireless networks are characterized by bursty and location-dependent errors. Although many fair scheduling methods have been proposed to address these issues, most of them assume a simple two-state channel model, where a channel can be either good or bad. However, the situation is not so ..."
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Cited by 6 (1 self)
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Abstract — Wireless networks are characterized by bursty and location-dependent errors. Although many fair scheduling methods have been proposed to address these issues, most of them assume a simple two-state channel model, where a channel can be either good or bad. However, the situation is not so pessimistic since different modulation techniques can be adapted to different channel conditions. Multi-rate transmission is a common technique for wireless networks nowadays. This leads to a dilemma: should fairness be built based on the amount of medium time that a user utilizes or the amount of services that a user receives? In this work, we propose a Multi-rate wireless Fair Queueing (MR-FQ) algorithm that allows a flow to transmit at different rates according to its channel condition and lagging degree. MR-FQ takes both time and service fairness into account. It not only guarantees fairness and bounded delays for packet flows, but also increases the overall system throughput.
Resource allocation with service differentiation for wireless video transmission
- IEEE Trans. Wireless Commun
, 2006
"... Abstract — The next generation wireless networks need to support video traffic. A major challenge in video services over wireless networks is quality of service (QoS) provisioning. Service differentiation is a good approach for QoS provisioning to video traffic. In this paper, we propose a cross-lay ..."
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Cited by 2 (1 self)
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Abstract — The next generation wireless networks need to support video traffic. A major challenge in video services over wireless networks is quality of service (QoS) provisioning. Service differentiation is a good approach for QoS provisioning to video traffic. In this paper, we propose a cross-layer protocol stack architecture for wireless video transmission with service differentiation. In the cross-layer architecture, the application layer provides the lower link layer with the video compression information. Using the information, a dynamic-weight general-ized processor sharing (DWGPS) discipline is proposed for the link layer resource allocation. The link layer tries to provide the application layer with a stringent delay bound and strong protection to high priority traffic in the case of resource shortage. Acceptable level of fairness can be achieved by DWGPS. A scheduling procedure for DWGPS is presented, which avoids complex per-packet virtual time calculation. It is shown that DWGPS can automatically adapt to multiuser diversity without many modifications. Simulation results demonstrate the effective-ness and efficiency of the link-layer DWGPS resource allocation. Index Terms — Cross-layer design, multiuser diversity, quality of service (QoS), resource allocation, wireless video transmission. I.
Adaptive token bank fair queuing scheduling in the downlink of 4G wireless multicarrier networks
- in Proceedings of the 67th IEEE Vehicular Technology Conference (VTC ’08
"... Abstract—In this paper we present an efficient cross-layer scheduling algorithm designed for resource allocation in downlink of 4G wireless multicarrier networks. This study focuses on the mechanisms of efficiency, fairness, as well as quality of service (QoS) provisioning and algorithm development ..."
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Abstract—In this paper we present an efficient cross-layer scheduling algorithm designed for resource allocation in downlink of 4G wireless multicarrier networks. This study focuses on the mechanisms of efficiency, fairness, as well as quality of service (QoS) provisioning and algorithm development for resource allocation in multiuser frequency-selective fading environments. The performance of the proposed scheme is compared to that of the Score Based (SB) scheduling, which is a variation of the Proportional Fair (PF) algorithm (the most widely adapted opportunistic scheduling technique), in the presence of interference. It is observed from simulation results that the proposed scheme provides better fairness in terms queuing delays, and dropped packets for various loading factors while the throughput remains comparable. A gain in the performance of cell edge users is also observed for the proposed scheme, this may result in substantial savings in the deployment cost since fewer base stations (BS) will be needed to cover regions.
MR-FQ: A Fair Scheduling Algorithm for Wireless Networks with Variable Transmission Rates
"... Abstract — Wireless networks are characterized by bursty and location-dependent errors. Although many fair scheduling meth-ods have been proposed to address these issues, most of them assume a simple two-state channel model, where a channel can be either good or bad. However, the situation is not so ..."
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Abstract — Wireless networks are characterized by bursty and location-dependent errors. Although many fair scheduling meth-ods have been proposed to address these issues, most of them assume a simple two-state channel model, where a channel can be either good or bad. However, the situation is not so pessimistic since different modulation techniques can be adapted to different channel conditions. Multi-rate transmission is a common technique for wireless networks nowadays. This leads to a dilemma: should fairness be built based on the amount of medium time that a user utilizes or the amount of services that a user receives? In this work, we propose a Multi-rate wireless Fair Queueing (MR-FQ) algorithm that allows a flow to transmit at different rates according to its channel condition and lagging degree. MR-FQ takes both time and service fairness into account. It not only guarantees fairness and bounded delays for packet flows, but also increases the overall system throughput.
SIMULATION: TRANSACTIONS OF THE SOCIETY FOR MODELING AND SIMULATION INTERNATIONAL 1 MR-FQ: A Fair Scheduling Algorithm for Wireless Networks with Variable Transmission Rates
"... Abstract—Wireless networks are characterized by bursty and location-dependent errors. Although many fair scheduling algorithms have been proposed to address these issues, most of them assume a simple two-state channel model, where a channel can be either good or bad. In fact, the situation is not so ..."
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Abstract—Wireless networks are characterized by bursty and location-dependent errors. Although many fair scheduling algorithms have been proposed to address these issues, most of them assume a simple two-state channel model, where a channel can be either good or bad. In fact, the situation is not so pessimistic because different modulation techniques can be used to adapt to different channel conditions. Multi-rate transmission is a common technique for wireless networks nowadays. This leads to a dilemma: should fairness be built based on the amount of time that a user utilizes the medium or the amount of services that a user receives? In this work, we propose a Multi-rate wireless Fair Queueing (MR-FQ) algorithm that allows a flow to transmit at different rates according to its channel condition and lagging degree. MR-FQ takes both time and service fairness into account. We demonstrate that MR-FQ can guarantee fairness and bounded delays for packet flows by mathematical modeling and analyses. Besides, simulation results show that MR-FQ can also increase the overall system throughput compared to other scheduling methods. Index Terms—communication network, fair scheduling, multi-rate communication, quality of service (QoS), wireless network. 1
A Generalized Analytical Framework for SMPT in a Multicode CDMA Wireless System
"... Abstract. Simultaneous MAC Packet Transmission (SMPT) has recently been proposed for stabilizing the through-put over wireless links, which is one of the key challenges in providing high-quality wireless multimedia ser-vices. SMPT stabilizes the wireless link by transmitting multiple packets on mult ..."
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Abstract. Simultaneous MAC Packet Transmission (SMPT) has recently been proposed for stabilizing the through-put over wireless links, which is one of the key challenges in providing high-quality wireless multimedia ser-vices. SMPT stabilizes the wireless link by transmitting multiple packets on multiple CDMA channels in par-allel in response to packet drops due to wireless link errors. These parallel packet transmissions stabilize the link layer throughput, but they also increase the interference level in a given cell of a cellular network or clus-ter of an ad-hoc network, which in turn reduces the number of traffic flows that can be simultaneously sup-ported in a cell/cluster. We have recently developed an analytical framework for the class of SMPT mechanisms for a simple Bernoulli packet generation process, which does not reflect the oftentimes bursty packet genera-tion processes encountered in real networks. In this paper we develop a generalized analytical framework for SMPT, which accommodates bursty packet traffic (and also non-bursty Bernoulli traffic). This framework ex-presses the system dynamics in transition probabilities for a Markov chain and calculates the effects of the interference through an iterative approach. The numerical results from our analytical framework and verifying simulations indicate that SMPT provides a significant reduction in packet loss and buffer occupancies (and de-lay), especially for persistent traffic bursts, in exchange for a reduced number of supported flows. Our analyt-ical framework quantifies these system trade-offs with good accuracy and can thus be employed for resource management.
doi:10.1155/2009/212783 Research Article Cross-Layer Resource Scheduling for Video Traffic in the Downlink of OFDMA-Based Wireless 4G Networks
"... Designing scheduling algorithms at the medium access control (MAC) layer relies on a variety of parameters including quality of service (QoS) requirements, resource allocation mechanisms, and link qualities from the corresponding layers. In this paper, we present an efficient cross-layer scheduling ..."
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Designing scheduling algorithms at the medium access control (MAC) layer relies on a variety of parameters including quality of service (QoS) requirements, resource allocation mechanisms, and link qualities from the corresponding layers. In this paper, we present an efficient cross-layer scheduling scheme, namely, Adaptive Token Bank Fair Queuing (ATBFQ) algorithm, which is designed for packet scheduling and resource allocation in the downlink of OFDMA-based wireless 4G networks. This algorithm focuses on the mechanisms of efficiency and fairness in multiuser frequency-selective fading environments. We propose an adaptive method for ATBFQ parameter selection which integrates packet scheduling with resource mapping. The performance of the proposed scheme is compared to that of the round-robin (RR) and the score-based (SB) schedulers. It is observed from simulation results that the proposed scheme with adaptive parameter selection provides enhanced performance in terms of queuing delay, packet dropping rate, and cell-edge user performance, while the total sector throughput remains comparable. We further analyze and compare achieved fairness of the schemes in terms of different fairness indices available in literature. Copyright © 2009 Feroz A. Bokhari et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. 1.
