G-CBWL: a dynamic frequency allocation technique suitable for GSM

Althoff, Matthias; Scheibenbogen, M.; Seidenberg, P.

doi:10.1109/pimrc.1998.731436

Cited by 3 publications

(3 citation statements)

References 5 publications

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“…Thus the users of sectors will be divided in two types; first the users located close to the base station, who can use borrowed channels and other who can not use them. As discussed in [11] it can not be used in GSM system, as it is not possible to determine the eligibility of a mobile to get borrowed channels before call setup has been completed. There is one possibility to estimate it using RACH burst but it is short enough to lead large errors.…”

Section: Markov Models For Traffic Analysismentioning

confidence: 99%

“…In section II a quantitative analysis is done to measure the degradation in CII. Another aspect of the problem is the limitation of GSM system; as excess channels can be distributed in multiple of 'eight' so that a carrier frequency could be transferred, otherwise it will become impracticable, as discussed in [11]. Various limitations and its impact are further considered in section IV.…”

Section: Introductionmentioning

confidence: 99%

“…In [15] an improvement in basic CBWL scheme is discussed by doing the channel grouping in such a way that channels from a group of borrowable channels are allotted to be borrowed only by two neighboring cells which are themselves adjacent to each other as compared to CBWL in which only one neighbor cell can use a group. In [11] it is shown that CBWL can not be used in GSM network and a new suitable borrowing technique is discussed. h [1] the performance of four different types of DCA is discussed.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of a new fixed channel allocation scheme for a sectorized GSM cellular network

Tokekar

Purohit

2006

2006 IFIP International Conference on Wireless and Optical Communications Networks

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A GSM cellular network contains many cells which are connected to a main control unit called main switching centre (MSC). Each cell is responsible to provide a wireless duplex channel to mobile users of its area. The circuitry used at cells for the above purpose is called base transreceiver station (BTS). The channels in wireless networks are a scare resource thus the allotment of channels to the cells has a greater impact on the traffic performance of the network. It is shown that in terms of traffic capacity the dynamic channel allocation (DCA) algorithms outperform other algorithms [1]. But they require heavy signaling and increases delay in channel allocation to the users. On the other hand Fixed Channel Allocation (FCA) is simplest and fastest but have poor traffic capacity due to non uniform nature of the traffic in cellular networks. In some practical scenario neither of these techniques works satisfactory e.g. if one or more low traffic cells are located with heavy traffic surrounding cells; the reasons may be geographical (e.g. a lake exists in centre of city), social (e.g. a low profile area) or any other. In this work we have proposed a new FCA scheme for channel allocation in such scenario. The analysis is done for a sectorized GSM network. We are not addressing the problem of temporary hot spots but we are analyzing the long term traffic imbalance. It is observed that there exits a tradeoff between enhancement in grade of service (GOS) so achieved and the degradation in the voice quality received by cochannel users. This tradeoff is addressed in this work.

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Section: Markov Models For Traffic Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Analysis of a new fixed channel allocation scheme for a sectorized GSM cellular network

Tokekar

Purohit

2006

2006 IFIP International Conference on Wireless and Optical Communications Networks

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High Speed Downlink Packet Access (HSDPA)—Enhanced Data Rates for UMTS Evolution

2005

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Survivability index for a GPRS network

Purohit

Tokekar

2008

2008 16th IEEE International Conference on Networks

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The GPRS network has been well integrated in Global System for Mobile (GSM) network, the most dominant cellular standard, to accomplish efficient spectrum utilization for data traffic. It has become a popular service which carries critical business and social information of many subscribers. The issue of survivability for a GPRS network requires more investigation. This work introduces a new measure of survivability, Survivability Index (SI), which takes into account following important features of a GPRS network (i) success probability in uplink contention, (ii) average wait time to get a dedicated slots (iii) throughput and (iv) availability. A weighted sum form is proposed and Genetic Algorithm (GA) is used to find optimum values of weights. Considering various failure scenarios the Survivability Index has been evaluated for a GPRS network.

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G-CBWL: a dynamic frequency allocation technique suitable for GSM

Cited by 3 publications

References 5 publications

Analysis of a new fixed channel allocation scheme for a sectorized GSM cellular network

Analysis of a new fixed channel allocation scheme for a sectorized GSM cellular network

High Speed Downlink Packet Access (HSDPA)—Enhanced Data Rates for UMTS Evolution

Survivability index for a GPRS network

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