Authors: Akindele Segun AFOLABI, Chikara OHTA, Hisashi TAMAKI
This paper presents a co-operation protocol for indoor base stations in order to achieve a more efficient distribution of radio resources among neighboring indoor base stations. Indoor base stations are usually 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 base stations, co-operation between these base stations is vital for resolving problems such as interference. In the proposed scheme, femtocell, which is a typical example of indoor base station, is considered. Femtocells in close proximity exchange UE-assisted (User Equipment) received reference power information, and based on individual position of each femtocell, inter-base station interaction is used to form clusters.In each cluster, the cluster-head (CH) uses resource allocation tables to assign frequency-channel resources to cluster-members(CM) in a distributed manner. This scheme helps to ensure that the interest of neighbor base stations is always considered whenever a base station makes use of the available network resources such as frequency-channels. Our simulation results show that a significant percentage of the indoor base stations in a wireless network could cooperate to form clusters if our proposed co-operation protocol is used.
Keywords: indoor base station; femtocell; cluster; channelassignment; LTE-advanced