CBWL: A new channel assignment and sharing method for cellular communication systems

A new scheme that allows base stations to borrow channels from adjacent gateways in a cellular communication system is presented. Borrowed channels are used with reduced transmitted power to limit interference with cochannel cells. No channel locking is needed. The scheme permits simple channel control management without requiring global information about channel usage throughout the system. It provides enhanced traffic performance in homogeneous environments. Cochannel interference analyses show the scheme can maintain the same SIR as nonborrowing schemes. Analytical models using multidimensional birth-death processes and decomposition methods are devised to characterize the performance of the scheme. The results, which are validated by simulation, indicate that significant traffic capacity can be achieved in comparison with nonborrowing schemes.