In power controlled CDMA systems, the number of users that each cell can support is limited by the total interference received at each base station and will vary with time. When a system is congested, admitting a new call can only make the link quality worse for ongoing calls and may result in call dropping. Thus, a system needs a call admission policy for new call requests to maintain acceptable connections for existing users. In this work, we use a weighted combination of call blocking and call dropping probabilities as a system performance measure. We study a transmitted power based call admission control (TPCAC) scheme that protects ongoing calls and a received power based call admission control (RPCAC) scheme that blocks new calls when the total received at a base station exceeds a threshold. The proposed schemes are evaluated by simulation of a one dimensional system and the RPCAC scheme is found to offer significant performance improvements.
|Number of pages||5|
|Journal||IEEE Vehicular Technology Conference|
|State||Published - 1 Jan 1996|
|Event||Proceedings of the 1996 IEEE 46th Vehicular Technology Conference. Part 1 (of 3) - Atlanta, GA, USA|
Duration: 28 Apr 1996 → 1 May 1996