DSCH power control method for WCDMA

1. A DSCH power control method in a mobile communication system comprising:

(a) receiving a signal from an UE:

(b) determining whether a cell transmitting DSCH to be a set as primary or non-primary based on the received signal; and

(c) adjusting DSCH transmit power according to a result of the determination, wherein (b) includes,

(1) determining whether or not a primary cell ID code contained in the received signal matches a cell ID code of the cell, and setting the cell as primary if the cell ID code matches the primary cell ID code,

(2) if the cell ID code matches the primary cell ID code, determining whether the received signal is encoded in normal mode or compressed mode, and if the received signal is encoded in the compressed mode, determining whether or not the number of bits punctured from the total number of bits N ID in the primary cell ID code is less than N ID /3, and setting the cell as primary when the number of punctured bits is not greater than N ID /3, and

in all other situations, setting the cell as non-primary.

2. The DSCH power control method of claim 1 , wherein (c) includes:

decreasing DSCH transmit power when the cell is set as primary; and

increasing DSCH transmit power when the cell is set as non-primary.

3. The DSCH power control method of claim 1 , wherein (c) includes:

performing power control by assigning different DSCH power offset values according to whether the cell that transmits the DSCH is primary or non-primary.

4. The DSCH power control method of claim 3 , wherein (c) includes:

decreasing DSCH transmit power when the cell is set as primary; and

increasing DSCH transmit power when the cell is set as non-primary.

5. A power control method for a downlink shared channel of a mobile communication system, the method comprising:

receiving a signal from a user equipment;

making a determination as to whether a cell transmitting a downlink shared channnel should be set as primary or non-primary by using a procedure of,

comparing a cell ID code of the cell with a primary cell ID code of the received signal,

determining whether the received signal is encoded in a normal mode or a compressed mode, and

finding a total number of bits that are punctured from the primary cell ID code of the received signal, performed in any sequential order until the determination can be made: and

adjusting a transmit power of the downlink shared channel according to the cell being set as primary or non-primary.

6. The method of claim 5 , wherein the cell is set as non-primary,

if the cell ID code does not match the primary cell ID code, or

if the received signal is encoded in compressed mode and less than N ID /3 bits are punctured from the primary cell ID code, where N ID is a total number of bits in the primary cell ID code.

7. The method of claim 6 , wherein the cell is set as primary if otherwise.

8. The method of claim 7 , wherein the transmit power is increased if the cell is set as primary and is decreased if the cell is set as non-primary.

9. The method of claim 6 , wherein Site Selection Diversity Transmit signaling is used for transmit power control of the downlink shared channel.

10. A power control method for a downlink shared channel of a mobile communication system, the method comprising:

receiving a signal from a user equipment;

recognizing a cell that transmits a downlink shared channel as having non-primary status,

if a primary cell ID code of the received signal does not match an ID code of the cell, and

if an uplink compressed mode is used and less than N ID /3 bits are punctured from the primary cell ID code, where N ID is a total number of bits in the primary cell ID code,

otherwise, recognizing the cell as having primary status; and

adjusting a transmit power of the downlink shared channel according to the primary or non-primary status of the cell.

11. The method of claim 10 , wherein the transmit power is increased if the cell has primary status and is decreased if the cell has non-primary status.

12. The method of claim 10 , wherein Site Selection Diversity Transmit signaling is used for transmit power control of the downlink shared channel.

13. A Site Selection Diversity Transmit (SSDT) method comprising:

performing SSDT signaling to reduce diversity effects; and

performing SSDT signaling to achieve Downlink Shared Channel (DSCH) power control, wherein the SSDT signaling to achieve DSCH power control comprises:

if a primary cell ID code of a received signal does not match an ID code of the cell, and

if an uplink compressed mode is used and less than N ID /3 bits are punctured from the primary cell ID code, where N ID is a total number of bits in the primary cell ID code,

otherwise, recognizing the cell as having primary status; and

performing power control by assigning different DSCH power offset values according to whether the cell is primary or non-primary.