Abstract:
Coordinated Multi Point (CoMP) transmission in
Cloud Radio Area Network (CRAN) strives to provide the
required Quality of Service (QoS), irrespective of user’s location.
Specifically, CoMP enables intra-cluster Access Points (APs) to
maximize user’s performance utilizing channel information,
which is obtained by exchanging prior-known pilot signals
among the intended users and intra-cluster APs. These signals
are often referred as training signals, and are shared over
Training Resources (TRs). However, CoMP is pillared on usercentric network, thereby the resulting clusters are inevitably
overlapped. As a result, the TR allocation schemes for these
networks require considerably large computational complexity.
In this paper, we introduce the notion of Time Slot Tagging
(TST), in which each AP is tagged with an appropriate training
slot. Further, clusters are formed on the basis of this tagged
information. Specifically, TST eliminates the requirement of
resource allocation for individual users which saves a significant
time in each clustering cycle, and thus enhances the link
utilization factor. Also, TST is designed in a manner that it
assures the presence of preferred APs in each intended cluster.
Further, it is shown that the proposed approach performs
significantly close to the most optimistic scenario.
