Patent ID: 8483302

Claim:
A method in a radio base station for signal interaction with a user equipment configured for multi carrier operation on a set of carriers including two or three secondary downlink carriers, wherein the method comprises: encoding a High-Speed Shared Control Channel (HS-SCCH) order comprising order type bits and order bits, by encoding the order type bits and order bits to be computable from a decimal-to-binary conversion of a function of a variable V, wherein V is a function of a desired activation status of the secondary downlink carriers and of any secondary uplink carrier of said set of carriers, and wherein the desired activation status of a secondary carrier is represented by 1 if the secondary carrier is activated for the user equipment and represented by 0 if the secondary carrier is not activated or not configured for the user equipment; and transmitting the encoded HS-SCCH order to the user equipment; wherein V =( D 2 +U 2 )+3 D 3 +6( U 4 +D 4 )+15 U 3 −9 U 3 U 4 +(1 −D 4 )(1 −U 3 )( D 3 +D 2 U 2 −D 3 U 2 −D 3 D 2 )(−1 +D 2 +U 2 ) or V=D 2 +U 2 +3 D 4 +6 D 3 +9 U 4 +15 U 3 −18 U 4 U 3 +(1 −D 3 )(1 −U 4 )( D 4 +D 2 U 2 −D 4 U 2 −D 4 D 2 )(−1 +D 2 +U 2 ) or V =( D 2 +U 2 )+3 D 4 +6( U 3 +D 3 )+15 U 4 −9 U 3 U 4 +(1 −D 3 )(1 −U 4 )( D 4 +D 2 U 2 −D 4 U 2 −D 4 D 2 )(−1 +D 2 +U 2 ) wherein parameters D k and U l represent the desired activation status of downlink secondary carrier k and uplink secondary carrier l, respectively; and wherein D k =1 indicates that secondary downlink carrier k is activated for the user equipment; D k =0 indicates that secondary downlink carrier k is not activated or not configured for the user equipment; U l =1 indicates that secondary uplink carrier l is activated for the user equipment; and U l =0 indicates that secondary uplink carrier l is not activated or not configured for the user equipment.