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

A new easy to implement channel allocation scheme suitable for GSM, called G-CBWL (GSM channel borrowing without locking) is described. This channel allocation scheme takes the advantages of the well known CBWL strategy to make a GSM network more resistant against local and temporary traffic overloads. The proposed allocation scheme is easy to introduce in an existing GSM network as it does not affect fixed frequency planning and it only marginally increases the signaling load in the network. A system architecture using this strategy is explained taking into account the constraints of an existing network topology. Implementational issues for usage of the proposed algorithm in GSM are considered. A GSM simulation tool is presented and the performance of the algorithm is simulated. It is shown that this channel allocation strategy can lower the rate of blocked calls significantly