A Novel Co-operative Channel Assignment Scheme for Indoor Base Stations

Abstract

This paper presents a co-operation technique of
channel assignment (CA) for indoor base stations (BSs). Indoor
BSs are most of the time deployed by users in an ad-hoc manner
which makes prior network planning by network operators
impossible. If the same pool of radio resources (e.g channels) is
used by close BSs, co-operation between these BSs is vital for
resolving problems such as interference. In the proposed scheme,
femtocell base station (FBS), which is a typical example of indoor
BS, is considered. FBSs in close proximity exchange UE-assisted
(User Equipment) measured reference power information, and
based on individual position of each FBS, inter-BS interaction is
used to form clusters. In each cluster, the cluster-head (CH) uses
channel assignment tables to assign channel resources to clustermembers
(CMs) in a distributed manner. This scheme helps to
ensure that the interest of neighbor BSs is always considered
whenever a BS makes use of the available network resources.
Our simulation results show that co-operative CA using a clusterbased
approach yields higher average user throughput than
autonomous channel selection by individual BSs.