Estimating absolute power level in a MUROS system

• US 8,547,898 B2
• Filed: 02/04/2010
• Issued: 10/01/2013
• Est. Priority Date: 02/12/2009
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Jamadagni, Satish Nanjunda Swamy, Ganapathi, Sarvesha Anegundi
• Primary Examiner(s): Renner, Brandon
• Assistant Examiner(s): Choudhury, Faisal
• Application Number:
  US12/700,361
• Publication Number:
  US 20100203897A1
• Time in Patent Office: 1,335 Days
• Field of Search: 370/318, 455/450
• US Class Current: 370/318
• CPC Class Codes: H04B 17/318 Received signal strength
• CPC Class Codes: H04W 52/16 Deriving transmission power values from another channel
• CPC Class Codes: H04W 52/24 using SIR [Signal to Interference Ratio] or other wireless path parameters

Abstract

An apparatus and method for estimating an absolute power level in a Multiple Users Reusing One Single time slot (MUROS) system are provided. The absolute value of power level of the MUROS user is received by the MUROS user from a Base Transceiver Station (BTS). The MUROS user also determines the mean value of its own signal strength. The absolute value of power level of the other user paired with the MUROS user is estimated using the received absolute value of power level of the MUROS user and the determined mean value of signal strength. The estimated absolute value of power level of the other user and the absolute value of power level of the MUROS user are further used by the MUROS user to estimate its channel. Information about the estimated channel of the MUROS user is provided to the BTS by the MUROS user and the BTS uses this information to allocate power to the two users which are paired for MUROS.

Claims

1. A method for estimating an absolute value of power level, by a first mobile station included in a pair, in a Multiple Users Reusing One Single time slot (MUROS) system including the pair of two mobile stations connected to a Base Transceiver Station (BTS), the method comprising:

after transmitting a receiving quality for a complex symbol received from the BTS, receiving a first value of power level of the first mobile station updated based on the receiving quality;

determining a mean value of signal strength using the first value and the complex symbol; and

after receiving the complex symbol re-transmitted from the BTS, estimating a second value of power level of a second mobile station included in the pair using the first value and the mean value of signal strength.

2. The method according to claim 1, further comprising:

estimating a channel for the first mobile station using the estimated second value and the first value; and

transmitting information about the estimated channel to the BTS.

3. The method according to claim 1, wherein the first mobile station is a MUROS mobile station and the second mobile station is a legacy mobile station, and

wherein the MUROS mobile station indicates a mobile station having the capability for MUROS.

4. A first mobile station included in a pair for estimating an absolute value of power level in a Multiple Users Reusing One Single time slot (MUROS) system including the pair of two mobile stations connected to a Base Transceiver Station (BTS), the first mobile station comprising:

a transceiver for receiving a first value of power level of the first mobile station updated based on the receiving quality from the BTS after transmitting a receiving quality for a complex symbol received from the BTS, and

a controller for determining a mean value of signal strength using the first value and the complex symbol, and for, after receiving the complex symbol retransmitted from the BTS, estimating a second value of power level of a second mobile station included in the pair using the first value and the mean value of signal strength.

5. The first mobile station according to claim 4, wherein the controller estimates a channel for the first mobile station using the estimated second value and the first value, controlling the transceiver for transmitting information about the estimated channel to the BTS.

6. The first mobile station according to claim 4, wherein the first mobile station is a MUROS mobile station and the second mobile station is a legacy mobile station, and

wherein the MUROS mobile station indicates a mobile station having the capability for MUROS.

7. A method for estimating an absolute value of power level in a Multiple Users Reusing One Single time slot (MUROS) system including a pair of two mobile stations connected to A Base Transceiver Station (BTS), the method comprising:

transmitting a complex symbol to a first mobile station and a second mobile station included in the pair;

if a receiving quality for the complex symbol is received from the first mobile station, updating a first value of power level of the first mobile station based on the receiving quality, transmitting the updated first value; and

after re-transmitting the complex symbol to the first mobile station and the second mobile station, if information about a channel estimated is received from the first mobile station, allocating power to the first mobile station and the second mobile station using the information.

8. The method according to claim 7, wherein the channel is estimated by using the updated first value and a second value of the second mobile station, and

wherein the second value is estimated by using the first value and the mean value of signal strength determined by using the first value and the complex symbol.

9. The method according to claim 7, wherein the first mobile station is a MUROS mobile station and the second mobile station is a legacy mobile station, and

wherein the MUROS mobile station indicates a mobile station having the capability for MUROS.

10. A Base Transceiver Station (BTS) for estimating an absolute value of power level in a Multiple Users Reusing One Single time slot (MUROS) system including the pair of two mobile stations connected to the BTS, the BTS comprising:

a transceiver for transmitting a complex symbol to a first mobile station and a second mobile station included in the pair; and

a controller for

updating a first value of power level of the first mobile station based on a receiving quality,

if the receiving quality for the complex symbol is received from the first mobile station, controlling the transceiver for transmitting the updated first value, and

after re-transmitting, by the transceiver, the complex symbol to the first mobile station and the second mobile station, if information about a channel estimated is received from the first mobile station, allocating power to the first mobile station and the second mobile station using the information.

11. The BTS according to claim 10, wherein the channel is estimated by using the updated first value and a second value of the second mobile station, and

wherein the second value is estimated by using the first value and the mean value of signal strength determined by using the first value and the complex symbol.

12. The BTS according to claim 10, wherein the first mobile station is a MUROS mobile station and the second mobile station is a legacy mobile station, and

wherein the MUROS mobile station indicates a mobile station having the capability for MUROS.