Method of calculating C value used for uplink power control

• US 8,995,315 B2
• Filed: 04/10/2007
• Issued: 03/31/2015
• Est. Priority Date: 04/10/2006
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Koo, Hyoun Hee, Lee, Sang Rok
• Primary Examiner(s): Eng, George
• Assistant Examiner(s): HAMMONDS, MARCUS C
• Application Number:
  US11/733,719
• Publication Number:
  US 20070243895A1
• Time in Patent Office: 2,912 Days
• Field of Search: 370/310, 370/318, 455/522, 455/127.1, 379/395.1, 398/94, 398/197
• US Class Current: 370/310
• 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 normalized received signal level (NRSL) value in a mobile communication system that supports at least a packet idle mode, a packet transfer mode, a dedicated mode or a dual transfer mode, the method comprising:

obtaining, by a mobile station (MS), a first NRSL value in the dedicated mode;

transitioning, by the MS, from the dedicated mode to the packet idle mode;

calculating, by the MS in the packet idle mode, a second NRSL value for use in the packet idle mode, the second NRSL value calculated using a mean value of a received signal level of four normal bursts that compose a radio block and an output power reduction value of a base transceiver station (BTS) relative to an output power used for a broadcast control channel; and

filtering, by the MS in the packet idle mode, the second NRSL value with a running average filter using a forgetting factor, a first iteration index, and the first NRSL value,

wherein the first iteration index continues from a second iteration index that is obtained by the MS in the dedicated mode, and

wherein the dedicated mode is a circuit switched mode and the packet transfer mode is a packet switched mode.

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

a)*C_n-1+a*C_block,n, where “

a”

is the forgetting factor, “

n”

is the first iteration index, and C_block,n is the second NRSL value for each radio block.

3. The method of claim 2, wherein the second NRSL value is calculated by C_block,n=SS_block,n+Pb, where SS_block,n is the mean value and Pb is the output power reduction value.

4. A method of calculating a normalized received signal level (NRSL) value in a mobile communication system that supports at least a packet idle mode, a packet transfer mode, a dedicated mode or a dual transfer mode, the method comprising:

receiving, by a mobile station (MS), four normal bursts that compose a radio block;

transitioning, by the MS, from the dedicated mode to the packet idle mode;

calculating, by the MS in the packet idle mode, the NSRL value for use in the packet idle mode, the NRSL value calculated using a mean value of a received signal level of the four normal bursts and a output power reduction value of a base transceiver station (BTS) relative to an output power used for a broadcast control channel;

filtering, by the MS, the NRSL value with a running average filter using a forgetting factor and an iteration index; and

transmitting, by the MS, data using an output power calculated in consideration of the filtered NRSL value,

wherein the running average filter is restarted with the iteration index set to 1 for a first sample when the MS has no valid NRSL value in the dedicated mode, and

wherein the dedicated mode is a circuit switched mode and the packet transfer mode is a packet switched mode.

5. The method of claim 4, wherein the NRSL value is filtered by C_n=(1−

a)*C_n-1+a*C_block,n, where “

a”

is the forgetting factor, “

n”

is the iteration index, and C_block,n is the NRSL value for each radio block.

6. The method of claim 4, wherein the NRSL value is calculated by C_block,n=SS_block,n+Pb, where SS_block,n is the mean value and Pb is the output power reduction value.

7. A mobile station (MS) for calculating a normalized received signal level (NRSL) value in mobile communication system that supports at least a packet idle mode, a packet transfer mode, a dedicated mode or a dual transfer mode, the MS comprising:

a running average filter; and

a processor configured to;

obtain a first NRSL value in the dedicated mode;

transition from the dedicated mode to the packet idle mode; and

calculate a second NRSL value in the packet idle mode for use in the packet idle mode, the second NRSL value calculated using a mean value of a received signal level of four normal bursts that compose a radio block and an output power reduction value of a base transceiver station (BTS) relative to an output power used for a broadcast control channel,

wherein the running average filter is configured to filter the second NRSL value in the packet idle mode using a forgetting factor, a first iteration index, and the first NRSL value, and

wherein the first iteration index continues from a second iteration index that is obtained by the MS in the dedicated mode, and

wherein the dedicated mode is a circuit switched mode and the packet transfer mode is a packet switched mode.

8. The mobile station of claim 7, wherein the running average filter is expressed as C_n=(1−

a)*C_n-1+a*C_block,n, where “

a”

is the forgetting factor, “

n”

is the first iteration index, and C_block,n is the second NRSL value for each radio block.

9. The mobile station of claim 7, wherein the second NRSL value is calculated by C_block,n=SS_block,n+Pb, where SS_block,n is the mean value and Pb is the output power reduction value.

10. A mobile station (MS) for calculating a normalized received signal level (NRSL) value in mobile communication system that supports at least a packet idle mode, a packet transfer mode, a dedicated mode or a dual transfer mode, the MS comprising:

a transmitter configured to transmit data;

a running average filter;

a receiver configured to receive four normal bursts that compose a radio block; and

a processors configured to transition the MS from the dedicated mode to a packet idle mode and calculate the NRSL value for use in the packet idle mode, the NRSL value calculated using a mean value of a received signal level of the four normal bursts and an output power reduction value of a base transceiver station (BTS) relative to an output power used for a broadcast control channel (BCCH),

wherein the running average filter is configured to filter the NRSL value using a forgetting factor and an iteration index,

wherein the running average filter is restarted with the iteration index set to 1 for a first sample when the MS has no valid NRSL value during the dedicated mode,

wherein the transmitter is further configured to transmit the data using an output power calculated in consideration of the filtered NRSL value, and

wherein the dedicated mode is a circuit switched mode and the packet transfer mode is a packet switched mode.

11. The mobile station of claim 10, wherein the running average filter is expressed as C_n=(1−

a)*C_n-1+a*C_block,n, where “

a”

is the forgetting factor, “

n”

is the iteration index, and C_block,n is the NRSL value for each radio block.

12. The mobile station of claim 10, wherein the NRSL value is calculated by C_block,n=SS_block,n+Pb, where SS_block,n is the mean value and Pb is the output power reduction value.