OFDMA resource allocation in IEEE 802.16 networks: A performance comparative

del-Castillo, Juan I.; Delicado, Francisco M.; Delicado, Jesús; Villalón, José

doi:10.1109/wmnc.2010.5678754

Cited by 6 publications

(6 citation statements)

References 11 publications

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“…The queuing mechanism queues the requests from different users, and then the slots are allocated according to this sequence. The requests of users can be queued based on different criteria, e.g., energy consumption [7], different QoS requirements [8], fairness [8], channel quality [7]- [9], and size of the requests [9], [10]. The choice of these queuing mechanisms depends on the preference of the service providers.…”

Section: A Ofdma and Burst Allocation In P2pwransmentioning

confidence: 99%

“…The allocation method indicates which slot is allocated first, e.g., from top to bottom and left to right in [11], from bottom to top and right to left in [12], row by row from right to left in [13], and from right to left with largest requests considered first in [14]. Del-Castillo, et al [10] proved that the last allocation method (in [14]) has the least wasted slots (slots without data) in WiMAX.…”

Section: A Ofdma and Burst Allocation In P2pwransmentioning

confidence: 99%

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Adapting IEEE 802.22 OFDMA system for P2PWRANs

Shi

Prasad

Rao

et al. 2013

2013 IEEE Global Communications Conference (GLOBECOM)

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IEEE 802.22 is the first standard to uitilize cognitive radio technology for wireless regional area networks (WRANs). It has adopted a cellular topology containing one base station (BS) and multiple customer premises equipments (CPEs) in a cell. It covers a very large area with radius ranging up to 100 km. Orthogonal frequency-division multiple access (OFDMA) system is employed and it is further slotted in time-domain. In one slot only one CPE can be allocated, and every intra-cell packet needs to be routed through the BS. This point-to-multi-point structure significantly limits the network capacity in the case of CPE-CPE communication, which is predicted to happen, and even the use of OFDMA does not help much. Therefore, peer-topeer WRAN (P2PWRAN) has been proposed to support direct intra-cell communication in order to extend the network capacity. In this paper, the IEEE 802.22 OFDMA system is adapted to P2PWRAN to support direct CPE-CPE communications. The downstream burst allocation in P2PWRAN is similar to the OFDMA system of IEEE 802.16, which has been widely studied in the literature. Therefore, in this paper we look at the unexplored upstream burst allocation where slots can be reused among CPEs and the BS with power control mechanisms. We propose a burst allocation algorithm that maximizes the network capacity greedily. The algorithm is examined under various conditions such as, number of CPEs, size of requests, length of US subframes and type of requests (CPE-BS or CPE-BS). We also show that our algorithm performs better than the existing solutions.Index Terms-IEEE 802.22, WRAN, OFDMA, cognitive radio, channel allocation, burst allocation.Globecom 2013 -Cognitive Radio and Networks Symposium 978-1-4799-1353-4/13/$31.00 ©2013 IEEE

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Section: A Ofdma and Burst Allocation In P2pwransmentioning

confidence: 99%

Section: A Ofdma and Burst Allocation In P2pwransmentioning

confidence: 99%

Adapting IEEE 802.22 OFDMA system for P2PWRANs

Shi

Prasad

Rao

et al. 2013

2013 IEEE Global Communications Conference (GLOBECOM)

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“…A comparative of three of the above mentioned algorithms was done in [11]. In [6], authors seek to optimize the receiver awake cycle by reducing the average duration and delay of the bursts within a given frame.…”

Section: Related Workmentioning

confidence: 99%

“…We have selected SDRA [9], Ohseki et al [10] and eOCSA [5] for the evaluation. This selection is based on the results and conclusions obtained in [11]. In the case of our proposal we reserve one column (n = 1), as stated in Section 3.…”

Section: Performance Evaluationmentioning

confidence: 99%

OFDMA Downlink Burst Allocation Mechanism for IEEE 802.16e Networks

del-Castillo¹,

Delicado²,

Villalón³

2011

Networking 2011

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Abstract. Orthogonal Frequency Division Multiple Access (OFDMA) is one of the most promising, demanded and researched modulation and access methods for future mobile wireless networks. Emerging technologies, like Worldwide Interoperability for Microwave Access (WiMAX) or Long Term Evolution (LTE), are adopting OFDMA due to its high spectral efficiency, scalability for high amounts of users and mobility support. In OFDMA, before data is actually transmitted, it must be mapped into a time-frequency matrix through a resource allocation process. This step is critical for a correct network behaviour, and several factors must be taken into account like efficiency, Quality of Service (QoS) fulfillment or power consumption. In this paper, we propose a novel approach for the mapping process of IEEE 802.16e networks, and we compare its performance with several existing algorithms. The effectiveness of our proposal is evaluated in different scenarios by means of extensive simulation.

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“…Mobile WiMAX makes use of an Orthogonal Frequency Division Multiple Access (OFDMA) which in order to achieve a higher MIMO spectral efficiency, shorter delay, and more efficient use of the bandwidth available [2]. In Mobile WiMAX systems, a base station (BS) has full control over resource allocations to various mobile stations (MSs) in both the downlink (DL) and the uplink (UL).…”

Section: Introductionmentioning

confidence: 99%

A Data Mapping Algorithm for Two-Level Requests in WiMAX Systems

Lee

Liu

Campbell

et al. 2012

2012 IEEE 75th Vehicular Technology Conference (VTC Spring)

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The IEEE 802.16e standard known as Mobile WiMAX has recently been introduced. It is considered as one of the most promising wireless access technologies supporting high data throughput with low cost of deployment. Mobile WiMAX makes use of Orthogonal Frequency-Division Multiple Access (OFDMA) digital modulation scheme as the transmission method. With the constraint requires that all requests have to be mapped as a rectangle, it is shown that finding an optimum mapping solution is an NP-complete problem. Many burst mapping algorithms have been proposed, but none considered the case with prioritized requests. This paper presents an efficient packing algorithm for two-level requests with two targets: (1) map high (MUST part) priority data as much as possible; and (2) achieve high efficiency, reduces the number of unused slots, and minimizes the mapping information overhead. Simulation results show that the proposed algorithm achieves high efficiency.

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OFDMA resource allocation in IEEE 802.16 networks: A performance comparative

Cited by 6 publications

References 11 publications

Adapting IEEE 802.22 OFDMA system for P2PWRANs

Adapting IEEE 802.22 OFDMA system for P2PWRANs

OFDMA Downlink Burst Allocation Mechanism for IEEE 802.16e Networks

A Data Mapping Algorithm for Two-Level Requests in WiMAX Systems

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