Reducing call dropping in distributed dynamic channel assignmentalgorithms by incorporating power control in wireless ad hoc networks

摘要

Methods of substantially reducing call dropping in networks whichnuse distributed dynamic channel assignment (DDCA) schemes are discussed.nInterference and received power thresholds coupled with power controlnare used to maintain performance, without the need for intra-cellnhandoffs. It is shown that the schemes reduce call dropping and increasencapacity compared to those using fixed transmitter power. The schemesnare developed with the aid of mathematical analysis and a pictorialnmodel. Results are presented which show that call dropping may benvirtually eliminated in shadowing environments with the medianntransmitter power being reduced by 15 dB. The various call droppingnmechanisms are discussed, and it is suggested that the residual level ofncall dropping is principally a result of multiple additional callnarrivals close to an active link. Methods to make further reductions innthe call dropping probability are also proposed