Evaluating frame structure design in WiMAX relay networks

Taha, Abd‐Elhamid M.; Kolomitro, Pandeli; Hassanein, Hossam S.; Ali, Najah Abu

doi:10.1002/cpe.1803

Cited by 3 publications

(4 citation statements)

References 13 publications

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“…These schemes will be discussed in the following sections. There are two ways to approach this; Single frame (SF) structure with multi RZs and Multi frame (MF) structure Seung-Yeon et al, 2008;Mach and Bestak, 2009;Peters and Heath, 2009;Taha et al, 2011). In SF structure with multi RZs, the number of DL-AZs and UL-RZs are determined depending on the number of intermediate NT-RS between MMR-BS and the SSs.…”

Section: Three Hops Frame Structurementioning

confidence: 99%

“…The second RZ is utilized to relay the second tier NT-RS. By the same way, they use specific RZs in the UL to send their data to their super-ordinate stations (MMR-BS or NT-RS) Hui and Chenxi, 2008;Seung-Yeon et al, 2008;Taha et al, 2011). In this frame structure, the data is relayed across multiple hops in one frame duration time.…”

Section: Three Hops Frame Structurementioning

confidence: 99%

“…The other approach is to group frames together into what is called a multi-frame (Hui and Chenxi, 2008;Taha et al, 2011). In this frame structure, simultaneous transmission in the DL-AZ and UL-AZ of both NT-RSs and MMR-BS is allowed while in the RZs, only one station (either MMR-BS or NT-RS) is eligible to transmit and the others should be in receiving mode.…”

Section: Three Hops Frame Structurementioning

confidence: 99%

See 2 more Smart Citations

Frame structure for Mobile multi-hop relay (MMR) WiMAX networks

Ismael¹,

Yusof²,

Abbas³

et al. 2013

Int. J. Phys. Sci.

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Mobile Multi-hop Relay (MMR) WiMAX network uses Relay stations (RSs) to extend the cell coverage, and enhances the link quality and the throughput. In MMR WiMAX networks, the number of hops between the Subscriber stations (SSs) and the Base station (BS) is allowed to be more than two hops when Non transparent RS (NT-RS) is used. However, this requires modification to the frame structure of NT-RS to reduce the delay of relaying the data packets across multiple hops. Therefore, this paper presents a new NT-RS frame structure aimed to decrease the multi-hop relaying delay in order to improve the performance of the data transmission over MMR WiMAX network. The proposed frame structure serves the sub-ordinate SSs as well as NT-RSs in the access zones, while using the relay zones to communicate with its super-ordinate stations. The performance of the proposed frame structure is tested through a simulation work. The results showed that, the forwarding delay is reduced, and hence the link layer and the Transmission control protocol (TCP) throughput are improved significantly.

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Section: Three Hops Frame Structurementioning

confidence: 99%

Section: Three Hops Frame Structurementioning

confidence: 99%

Section: Three Hops Frame Structurementioning

confidence: 99%

See 1 more Smart Citation

Frame structure for Mobile multi-hop relay (MMR) WiMAX networks

Ismael¹,

Yusof²,

Abbas³

et al. 2013

Int. J. Phys. Sci.

View full text Add to dashboard Cite

show abstract

“…Taha et al evaluate the consequence of choosing a frame structure type in Worldwide Interoperability for Microwave Access (WiMAX) networks based non‐transparent relay stations (ntRS). In the IEEE (Institute of Electrical and Electronics Engineers) 802.16j‐2009 protocol, two frame structure types are possible: single frame and multi frame.…”

mentioning

confidence: 99%

Special Issue: Performance evaluation of communications in distributed systems and Web based service architectures

Fouchal

Notare

2011

Concurrency and Computation

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EDITORIALSpecial Issue: Performance evaluation of communications in distributed systems and Web based service architectures Taha et al. [1] evaluate the consequence of choosing a frame structure type in Worldwide Interoperability for Microwave Access (WiMAX) networks based non-transparent relay stations (ntRS).In the IEEE (Institute of Electrical and Electronics Engineers) 802.16j-2009 protocol, two frame structure types are possible: single frame and multi frame. From performance evaluation point of view, a comparison has never been investigated. The authors suggest to expand on Light WiMAX ns2 add-on to support ntRS, the two frame structure types, in addition to the relevant operational requirements [e.g., quality of service (QoS)]. They show that the multi-frame structure allows higher throughput and voice capacities whereas the single frame shows some general advantage in terms of delay.De Grandia et al.[2] focus on the extension of the high level architecture (HLA) standard with balancing techniques to be used during simulation. The authors studied some balancing approaches to provide a sub-optimal solution for the imbalance issues. But, these approaches are limited to some simulation aspects. Also, a hierarchical balancing scheme was proposed that presents several drawbacks that are related to the centralization of the core part of the scheme, the redistribution algorithm, which is susceptible to bottlenecks, overheads, global synchronization, and single point of failure. Therefore, a scheme based on a distributed algorithm to rearrange the computational and communication load dynamically is proposed. Experiments have been performed to evaluate the effectiveness of the distributed scheme when compared with the scheme based on a centralized redistribution algorithm. The experimental results show that the distributed balancing technique can provide balancing efficiency similar to the centralized technique or even improve the performance gain for some specific cases. Gidenstam et al. [3] propose the cluster consistency model that bridges the gap between traditional and current approaches in supporting both scalability and ordered event delivery. The study introduces a dynamic and fault tolerant cluster management method that can coordinate concurrent access to resources in a peer-to-peer system and can be used to establish fault-tolerant configurable cluster consistency with predictable reliability, running on top of decentralized probabilistic protocols supporting scalable group communication. This paper provides analytical and experimental evaluation of the properties regarding the fault tolerance of the approach.Anderson [4] shows that the combination of various methods for information research significantly enhance the search results. The author explores context data, using query enhancement techniques, and appropriately fusing the results to provide the best ordering when presenting the results to the user. Context data includes a users personal calendar, location, preferences, personal vocabulary, and...

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Performance analysis of bidirectional cloud networks with imperfect channel state information

et al. 2014

Concurrency and Computation

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SUMMARYWith the rapid growth of cloud computing services, there is an increasing need to expand applications across data centers. In these paradigms, common information exchange between two data centers can be assisted via one or more substrate nodes, which correspond to bidirectional relaying communication. In this paper, we investigate the performance of time division broadcast (TDBC) protocol in bidirectional cloud networks in the presence of channel estimation errors (CEEs). The tight asymptotic expressions for individual and system outage probabilities are first presented in closed-form. It is shown that CEE causes outage probability to remain fixed even if the channel is noiseless. Then, the symbol error rate performance for TDBC protocol with M-ary Phase Shift Keying and M-ary quadrature amplitude modulation signals is analyzed. Simulation results validate the accuracy of our analytical results. Furthermore, comparison of signal-to-noise ratio gap ratio shows that TDBC protocol is less sensitive to the effect of CEE than analog network coding protocol.

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Evaluating frame structure design in WiMAX relay networks

Cited by 3 publications

References 13 publications

Frame structure for Mobile multi-hop relay (MMR) WiMAX networks

Frame structure for Mobile multi-hop relay (MMR) WiMAX networks

Special Issue: Performance evaluation of communications in distributed systems and Web based service architectures

Performance analysis of bidirectional cloud networks with imperfect channel state information

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