Title :
Uplink and downlink capacity analysis for two-tier CDMA cellular systems
Author :
Wu, Jung-Shyr ; Sze, Ming-Tzong ; Chung, Jen-Kung
Author_Institution :
Dept. of Electr. Eng., Nat. Central Univ., Chung-Li, Taiwan
Abstract :
The combination of macrocells and microcells in a two-tier cellular system is attractive because it provides a balance between maximizing the number of users per unit area and minimizing the network control associated with handoff. In this paper we study system capacity of a two-tier cellular architecture employing 3 TDMA/CDMA strategies. Both the uplink and downlink are evaluated via mathematical analysis. It shows that system performance degrades for larger macrocells or microcells and the capacities are poor for users near the macrocells´ boundary. It also shows a huge discrepancy between the results obtained for the center cell versus those obtained for the boundary cell
Keywords :
cellular radio; code division multiple access; time division multiple access; TDMA; boundary cell; center cell; downlink capacity analysis; handoff; macrocells; microcells; network control; system capacity; system performance; two-tier CDMA cellular systems; uplink capacity analysis; users per unit area; Cellular networks; Control systems; Degradation; Downlink; Macrocell networks; Mathematical analysis; Microcell networks; Multiaccess communication; System performance; Time division multiple access;
Conference_Titel :
INFOCOM '97. Sixteenth Annual Joint Conference of the IEEE Computer and Communications Societies. Driving the Information Revolution., Proceedings IEEE
Conference_Location :
Kobe
Print_ISBN :
0-8186-7780-5
DOI :
10.1109/INFCOM.1997.644514
