Title :
Call admission control in hierarchical cell structure
Author :
Ying, Wang ; Jingmei, Zhang ; Weidong, Wang ; Ping, Zhang
Author_Institution :
Wireless Technol. Innovation Lab., Beijing Univ. of Posts & Telecommun., China
fDate :
6/24/1905 12:00:00 AM
Abstract :
In interference limited CDMA systems, call admission control plays a very important role because it directly controls the number of users. We introduce a interference-based CAC algorithm according to the characteristics of HCS. This algorithm adopts a global strategy in macro layer, while using a local strategy in the micro layer. Meanwhile, in order to make full use of resources in the macro layer, different threshold values in the two layers are used. Simulation results show that the performance has been greatly improved.
Keywords :
cellular radio; code division multiple access; multiuser channels; radiofrequency interference; telecommunication congestion control; WCDMA system; call admission control; cell load measurement; distributed RPCAC algorithm; global strategy; hierarchical cell structure; interference limited CDMA systems; interference-based CAC algorithm; local strategy; macrocell layer; microcell layer; simulation results; Call admission control; Communication system control; Control systems; Interference; Macrocell networks; Microcell networks; Mobile communication; Multiaccess communication; Optimal control; Resource management;
Conference_Titel :
Vehicular Technology Conference, 2002. VTC Spring 2002. IEEE 55th
Print_ISBN :
0-7803-7484-3
DOI :
10.1109/VTC.2002.1002964
