METHOD OF CALCULATING C VALUE USED FOR UPLINK POWER CONTROL

• US 20070243895A1
• Filed: 04/10/2007
• Published: 10/18/2007
• Est. Priority Date: 04/10/2006
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Sang, Koo, Hyoun Hee
• Granted Patent: US 8,995,315 B2
• Time in Patent Office: Days
• US Class Current: 455/522
• CPC Class Codes: H04W 52/146 Uplink power control
• CPC Class Codes: H04W 52/246 where the output power of a terminal is based on a path parameter calculated in said terminal
• CPC Class Codes: H04W 52/286 during data packet transmission, e.g. high speed packet access [HSPA]
• CPC Class Codes: H04W 52/288 taking into account the usage mode, e.g. hands-free, data transmission, telephone

Abstract

A method of calculating a specified value when entering a second radio resource (RR) mode from a first RR mode is disclosed. More specifically, the method includes calculating a new specified value to be used in the second RR mode using a filter, an iteration index, and a last specified value calculated in the first RR mode if the calculation of the specified value is performed in the first RR mode, and calculating a new specified value to be used in the second RR mode by restarting the filter if the calculation of the specified value is not performed in the first RR mode.

Claims

1. A method of calculating a specified value when entering a second radio resource (RR) mode from a first RR mode, the method comprising:

calculating a new specified value to be used in the second RR mode using a filter, an iteration index, and a last specified value calculated in the first RR mode if the calculation of the specified value is performed in the first RR mode; and

calculating a new specified value to be used in the second RR mode by restarting the filter if the calculation of the specified value is not performed in the first RR mode,

2. The method of claim 1, wherein the specified value is a normalized received signal level.

3. The method of claim 1, wherein the first RR mode is any one of a dedicated mode, a dual transfer mode, a packet idle mode, a medium access control (MAC)-idle state, a packet transfer mode, or a MAC-shared state.

4. The method of claim 1, wherein the second RR mode is any one of a packet idle mode, a medium access control (MAC)-idle state, a dual transfer mode, a packet transfer mode, or a MAC-shared state.

5. The method of claim 1, wherein the filter is a running average filter which is expressed as C_n=(1−

a)*C<sub>n−

1</sub>+a*C_block,n where a is a forgetting factor, n is the iteration index, and C_block,n is a normalized specified value for each radio block.

6. The method of claim 5, wherein C_block,n=SS_block,n+Pb where SS_block,n is the mean of the received signal level of four (4) normal bursts that compose the radio block, and Pb is a value of base terminal station output power reduction relative to output power used on broadcast control channel (BCCH).

7. A method of calculating a specified value when entering a second radio resource (RR) mode from a first RR mode, the method comprising calculating a new specified value to be used in the second RR mode using a filter, an iteration index, and a last specified value calculated in the first RR mode if the specified value is calculated in the second RR mode, wherein the specified value is not calculated if the specified value is not calculated in the second RR mode.

8. The method of claim 7, wherein the specified value is a normalized received signal level.

9. The method of claim 7, wherein the first RR mode is any one of a packet idle mode, a medium access control idle state, or a dual transfer mode.

10. The method of claim 7, wherein the second RR mode is a dedicated mode,

11. The method of claim 7, wherein the last specified value is a last normalized received signal level calculated in the first RR.

12. A method of calculating a specified value when entering a second radio resource (RR) mode from a first RR mode, the method comprising calculating a new specified value to be used in the second RR mode using a filter, an iteration index, and a last specified value calculated in the first RR mode if the specified value is calculated in the first RR mode and if a network and a mobile station support a Dual Transfer Mode (DTM) Enhancements.

13. The method of claim 12, wherein the DTM Enhancements is an enhanced DTM circuit switched release or an enhanced DTM circuit switched establishment procedure.

14. The method of claim 12, wherein the specified value is a normalized received signal level.

15. The method of claim 12, wherein the first RR mode is any one of a dual transfer mode, a packet transfer mode, or a medium access control shared state.

16. The method of claim 12, wherein the second RR mode is any one of a dual transfer mode, a packet transfer mode, or a medium access control shared state.

17. A method of calculating a specified value in a dedicated mode, the method comprising calculating the specified value using a filter, an iteration index, and a last specified value, wherein the filter is a running average filter, C_n=(1−

b)*C<sub>n−

1</sub>+b*SS_n, where b is a forgetting factor, n is the iteration index, and SS_n is a received signal level.

18. A method of calculating a specified value in a dedicated mode, the method comprising calculating the specified value, C, using P_CH value which is an uplink transmit power provided by a network, wherein the uplink transmit power is expressed by P_CH=min(Γ

₀−

Γ

_CH−

α

*(C+48), PMAX) where Γ

_CH, Γ

₀, α

, and PMAX are control information necessary to determining the uplink transmit power.

19. The method of claim 18, wherein Γ

_CH is a mobile station (MS) and channel specific parameter, sent to the MS in a radio link control (RLC) message, Γ

₀ is an initial specific parameter, α

, is a system parameter, which is broadcasted on packet broadcast control channel (PBCCH) or optionally sent to the MS in the RLC message, and PMAX is a maximum allowed output in a cell.

20. The method of claim 18, wherein the specified value can be calculated using C=(Γ

₀−

Γ

_CH−

P_CH)/α

−

48 if Γ

₀Γ

_CH−

α

*(C+48)<

PMAX, wherein the specified value is denoted by C.

21. The method of claim 18, wherein the specified value can be calculated using P_CH=PMAX=Γ

₀−

Γ

_CH−

α

(C+48) and C=(Γ

₀−

Γ

_CH−

PMAX)/α

−

48 if Γ

₀−

Γ

_CH−

α

*(C+48)≧

PMAX, wherein the specified value is denoted by C.