Patent ID: 9253769
Filing Date: 2016-02-02
CPC Classification: H04L,H04W

Claim Text:
1. A method in a base station for supporting pilot channel selection for a mobile station in a wireless communication network comprising cells with base stations, wherein said base station has disposal of at least two pilot channels in its cell and each cell is divided into a plurality of cell portions, wherein said at least two pilot channels are common pilot channels, wherein each cell portion is associated with at least one respective Secondary Common Pilot Channel, S-CPICH, such that said at least two common pilot channels comprises said S-CPICHs, said method comprising: said base station determining at least one S-CPICH, associated with a respective cell portion, suitable to use for said mobile station being located within a coverage area of said base station, said base station starting to transmit said S-CPICH(s) and data over said cell portion associated with said S-CPICHs, said base station signalling to said mobile station said determined S-CPICH(s) for use, said base station receiving a confirmation from said mobile station indicating that said mobile station is using said determined S-CPICH(s), when said mobile station was using a Primary Common Pilot Channel, P-CPICH, then said base station terminating transmission of data over the cell associated with said P-CPICH, and when said mobile station was already using at least one old S-CPICH, then said base station terminating transmission of data over the cell portion associated with said old S-CPICH(s).