Patent ID: 8675879

Claim:
A method in a User Equipment, UE, for generating a second scrambling code group, where the UE is configured for multi carrier operation receiving downlink transmission from a Universal Mobile Telecommunications System Terrestrial Radio Access Network, UTRAN, on a set of at least two downlink carriers including an anchor carrier and at least a first secondary carrier, the method comprising the steps of: determining a first scrambling code group associated with a first cell on the anchor carrier; and deriving the second scrambling code group associated with a second cell on said first secondary carrier using a predefined rule defining the relation between the second scrambling code group and the first scrambling code group, wherein the UE is configured as having a first serving cell on the anchor carrier and a second serving cell on the first secondary carrier for reception of data from the UTRAN, and wherein the first cell is a neighbor cell to the first serving cell on the anchor carrier and the second cell is a neighbor cell to the second serving cell on the first secondary carrier.