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

Abstract

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.

Efficient Channel Access Techniques for Next Generation Mobile Networks

“…Sanjiv Tokekar et al [7] proposed a novel fixed channel allocation method for the purpose of channel allocation in a classified GSM network. The authors carried out their work in mainly two steps; the foremost step employed atypical fixed channel allocation for allocating same number of channels to all the cells and at that juncture reallocating the redundant channels having lesser traffic cells amid the neighbors in a statically.…”

Approach for channel reservation and allocation to improve quality of service in vehicular communications

“…Basically, there are three different types of channel allocation techniques, namely (i) fixed channel allocation (FAC) technique [1,2] in which each BS is allocated a fixed number of channels, (ii) dynamic channel allocation (DCA) technique [3][4][5] in which all channels are kept under centralised pool and the channels are requested by BSs and are assigned to nodes dynamically and (iii) finally, the last type of channel allocation technique is the hybrid channel allocation [6], which is a combination of fixed and DCA techniques in which some channels are kept in a central pool and some channels are allocated to BS. So, when all the channels under the control of BS are busy, BS requests the channels from central pool and returns back after the usage.…”

An efficient approach for distributed channel allocation with learning automata-based reservation in cellular networks

“…[1][2][3][4] In the fixed channel allocation scheme, [5][6][7][8][9] certain predetermined numbers of channels are allocated to each cell in the cellular network. The performance of this scheme can be improved, if a channel is borrowed from neighboring cells whenever required.…”