CBWL: a new channel assignment and sharing method for cellularcommunication systems

摘要

A new scheme that allows cell gateways (base stations) to borrownchannels from adjacent gateways in a cellular communication system isnpresented. Borrowed channels are used with reduced transmitted power tonlimit interference with cochannel cells. No channel locking is needed.nThe scheme, which can be used with various multiple access techniques,npermits simple channel control management without requiring globalninformation about channel usage throughout the system. It providesnenhanced traffic performance in homogeneous environments and also can benused to relieve spatially localized traffic overloads (tele-traffic `hotnspots'). Co-channel interference analysis shows that the scheme cannmaintain the same SIR as nonborrowing schemes. Analytical models usingnmultidimensional birth-death processes and decomposition methods arendevised to characterize performance. The results which are alsonvalidated by simulation indicate that significantly increased trafficncapacity can be achieved in comparison with nonborrowing schemes