According to this basic rule, we can extend it to the received signal strength comparison between a set of CoMP BSs and a single BS.
The CoMP extended coverage area, denoted as [0.sub.Jc] [member of] [O.sub.0], is the serving area provided by cooperative BSs in CoMP set instead of by the original central BS.
It should be noticed that it has the overlapped area among the extended coverage areas provided by different CoMP BSs pair if we use the multiple patterns.
Firstly we need to know the traffic change in the balanced and balancing BSs after load balancing, which is important to find the call blocking rate for each BS.
16, we can find the call blocking rate for balanced and balancing BSs after CoMP load-balancing:
Set the position coordinates to the original serving BS, CoMP BSs and UE: Original Serving BS: [BS.sub.0]([x.sub.0], [y.sub.0]); UE: UE (x,y); CoMP BSs: [BS.sub.1]([x.sub.1], [y.sub.1]), [BS.sub.2] ([x.sub.2], [y.sub.2]) ...
The UE's signal strength expectation received from the single original BS E([S.sub.0,k]) and CoMP BSs E([Sc.sub.k]) can be written as
Hence we can use KKT conditions to easily find the solution ([x.sup.*], [y.sup.*]) if we have a geological symmetrical distribution of BSs. Hence, the solution ([x.sup.*], [y.sup.*]) should satisfy