Channel assignment in multi-hop TDD W-CDMA cellular networks

AI-Riyami, M.; Safwat, Ahmed M.; Hassanein, Hossam S.

doi:10.1109/icc.2005.1494581

Cited by 18 publications

(17 citation statements)

References 5 publications

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“…In reference [1] poor communications to and from the base station due to severe multi-path fading and/or noise can be avoided when multihop relaying is used as an overlay architecture for single hop Time Division Duplex (TDD) and Wideband-Code Division Multiple Access (W-CDMA) cellular networks. Relaying is a fundamental concept in multihop wireless ad hoc networks whereby communications between mobile terminals are carried out through intermediate nodes.…”

Section: Litrature Survaiedmentioning

confidence: 99%

Multihop Cellular Networks: Dynamic Channel Assignment and Routing Protocol for Improving Performance

Maheswaran¹,

Paul²

2013

IJCA

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Multihop cellular Networks has the problem of channel assignment when connections are established between the adjacent cells and due to more number of nodes in the path between the sender and the receiver relay delay occurs and cause unwanted delay in the overall end to end communication. To overcome the problems associated with the relay delay and the overall performance in the Multihop Cellular Networks a new protocol is introduced which combines the merits of both the modified Minimum Slot Waiting First Algorithm and the modified Distance Vector Routing. Through the proposed new protocol, we can provide solution for the problem of routing and relay delay in Multihop Cellular Networks and the performance of the packet transmission can be improved.

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Section: Litrature Survaiedmentioning

confidence: 99%

Multihop Cellular Networks: Dynamic Channel Assignment and Routing Protocol for Improving Performance

Maheswaran¹,

Paul²

2013

IJCA

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“…Optimal number of subcarriers into which the bandwidth should be split in order to maximize the throughput of the OFDM based MCN is analyzed in [4]. Fair amount of work has also been done on CDMA based MCN [5], [6], [7]. However to the best of authors' knowledge, there is no literature available on CDMA-OFDM for MCN with generic …”

Section: Related Workmentioning

confidence: 99%

Access Mechanism for Multihop Cellular Networks

Kannan

Merchant

Desai

2007

2007 IEEE 66th Vehicular Technology Conference

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Abstract-We propose a CDMA-OFDM access mechanism for Multihop Cellular Networks (MCN). We construct groups within the MCN, where each group comprises of a source node, a destination node, their intermediate relay nodes and assign a correlated PN sequence to each such group. Within a particular group, a single carrier is assigned to each intermediate hop.The sub carriers assigned to the intermediate hops in a given group are mutually orthogonal. Hence the proposed OFDM is FDMA in nature. The sub carriers and transmit power levels to the relay nodes are assigned in such a way as to maximize the end-to-end throughput. The end-to-end throughput is formulated by assuming a Rayleigh flat fading channel between nodes. We present a method to reuse the PN codes assigned to the groups in a particular cell. We also introduce a novel architecture for MCN. Simulation results show that the proposed access mechanism achieves better end-to-end throughput and bit error rate (BER) performance as compared to standard access mechanisms like CDMA and OFDM-FDMA. Furthermore the proposed access mechanism has considerably higher BER performance in the presence of multiple transmit sources.

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“…The studies of resource allocation for W-CDMA MCNs have been presented in [10,11], whereas the studies of resource allocation for TDD-CDMA MCNs have been presented in [12][13][14]. Not only will the MCNs [10][11][12][13][14] increase the data rate for each MS, but also the multihop relaying technology will reduce the transmission power [15,16].…”

Section: Introductionmentioning

confidence: 99%

Performance Comparison of Time Slot Allocation Schemes in TDD-CDMA Multihop Cellular Networks

Arabshahi

Hong

Chong

2010

Wireless Pers Commun

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Today, high-speed multimedia services are becoming one of the most challenging demands of cellular subscribers. Many approaches have been proposed during last decade and still there are many ongoing researches aiming to provide higher speed and higher quality services for users. Multihop cellular network (MCN) is a promising solution to this problem. MCNs offer high-speed communication to mobile stations which are far from their base stations by relaying their data in a multihop connection. Moreover, TDD-CDMA networks are proven to be able to accommodate the asymmetric traffic generated by applications such as Internet browsers or multimedia applications. These types of traffic are most of the time biased towards uplink or downlink. In this paper we deploy multihop relaying in TDD-CDMA networks in order to provide high data rate connections targeting for multimedia applications. We propose time slot allocation schemes for TDD-CDMA MCNs and compare them with conventional schemes used in TDD-CDMA single-hop cellular networks in terms of users' data rate and maximum capacity in different symmetric and asymmetric traffic scenarios. Results of this study show that our proposed schemes can provide higher data rate as well as capacity and outperform other conventional schemes.

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Channel assignment in multi-hop TDD W-CDMA cellular networks

Cited by 18 publications

References 5 publications

Multihop Cellular Networks: Dynamic Channel Assignment and Routing Protocol for Improving Performance

Multihop Cellular Networks: Dynamic Channel Assignment and Routing Protocol for Improving Performance

Access Mechanism for Multihop Cellular Networks

Performance Comparison of Time Slot Allocation Schemes in TDD-CDMA Multihop Cellular Networks

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