This paper investigates the hierarchical cell structure (HCS) network consisting of macrocell and local area cell layers with partial cochannel sharing. We derive the ergodic capacity for each layer under cross-layer interference considering network-unplanned local area cell distribution. Based on the ergodic capacities, we also derive the area spectral efficiency (ASE) of the HCS network and investigate the optimum partial cochannel sharing that maximizes the ASE. It is confirmed that the maximum ASE is unchanged for a variable number of local area cells. Moreover, the spatial reuse benefit from the partial cochannel sharing is shown to be significant.
Bibliographical noteFunding Information:
Manuscript received January 8, 2010; revised April 30, 2010; accepted May 31, 2010. Date of publication June 14, 2010; date of current version October 20, 2010. This work was supported by Korea Science and Engineering Foundation through the NRL Program under Grant R0A-2007-000-20043-0. The review of this paper was coordinated by Dr. D. Zhao.
All Science Journal Classification (ASJC) codes
- Aerospace Engineering
- Electrical and Electronic Engineering
- Computer Networks and Communications
- Automotive Engineering