Forward Link Capacity of a CDMA System in a Hierarchical Cell with Hard/Soft Handoffs

Hyoung-Kyu SONG  Dae-Ki HONG  We-Duke CHO  

IEICE TRANSACTIONS on Communications   Vol.E85-B   No.7   pp.1392-1395
Publication Date: 2002/07/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technology
CDMA,  hierarchical cell,  soft handoff,  

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Both tiers are assumed to share the same frequency band. Unlike a single tier cell environment, interference components to be considered in a hierarchical cell environment include the inter-tier interference as well as the intra-cell and the inter-cell interference. The numerical results show that the transmission power ratio between the macro cell and the micro cell affects the forward link capacity. And the results also show that the macro cell capacity increases as the mobile moves toward the edge of the macro cell. Moreover, soft handoff makes it possible to obtain a higher forward link capacity in the handoff region.