Repacking on demand for two-tier wireless local loop

Author

Hung, Hui-Nien ; Lin, Yi-Bing ; Peng, Nan-Fu ; Tsai, Hsien-Ming

Author_Institution

Inst. of Stat., Nat. Chiao Tung Univ., Hsin-Chu, Taiwan

Volume

3

Issue

3

fYear

2004

fDate

5/1/2004 12:00:00 AM

Firstpage

745

Lastpage

757

Abstract

This paper proposes a radio channel assignment scheme called repacking on demand (RoD) for two-tier wireless local loop (WLL) networks. A two-tier WLL overlays a macrocell with several microcells. When a new call arrives at a two-tier WLL with RoD, if no idle channel is available in both the microcell and the macrocell, repacking is performed (i.e., a call in the macrocell is moved to its corresponding microcell), and then the reclaimed macrocell channel is used to serve the new call. An analytic model is proposed to compute the call blocking probability of the two-tier WLL with repacking. This analytic model is validated against simulation experiments. We prove that the blocking probability is not affected by the call holding time distributions, but is only dependent on the mean of the call holding times. Compared with some previous proposed schemes, RoD has low blocking probability and significantly reduces repacking rate.

Keywords

channel allocation; microcellular radio; probability; radio access networks; call holding time distribution; channel assignment; channel repacking; macrocell channel; microcell channel; radio channel assignment; repacking on demand; two tier wireless local loop networks; Analytical models; Base stations; Computational modeling; Educational institutions; Macrocell networks; Microcell networks; Sociotechnical systems; Speech; Telephony; Transceivers; Channel assignment; WLL; channel repacking; wireless local loop;

fLanguage

English

Journal_Title

Wireless Communications, IEEE Transactions on

Publisher

ieee

ISSN

1536-1276

Type

jour

DOI

10.1109/TWC.2004.826312

Filename

1296628