Boosting a signal-to-interference ratio of a mobile station

• US 8,140,091 B2
• Filed: 11/22/2010
• Issued: 03/20/2012
• Est. Priority Date: 10/12/2001
• Status: Expired due to Fees

• Current Assignee: Ericsson Evdo, Inc. (CommScope Holding Company, Inc.)
• Original Assignee: Airvana Network Solutions Inc (Telefonaktiebolaget LM Ericsson)
• Inventors: Chung, Sae-Young, Kim, Dae-Young, Eyuboglu, M. Vedat, Harikumar, Gopal
• Primary Examiner(s): Bhattacharya, Sam
• Application Number:
  US12/951,816
• Publication Number:
  US 20110065464A1
• Time in Patent Office: 484 Days
• Field of Search: 455446-449, 455/453, 455/63.1, 455/63.2, 455/63.4, 455/67.13
• US Class Current: 455/453
• CPC Class Codes: H04W 16/24 Cell structures
• CPC Class Codes: H04W 52/283 Power depending on the position of the mobile

Abstract

In a cell of a cellular wireless communication system, the SIR of at least one user in a sector of the cell is altered by temporarily reducing transmissions on a forward link in at least one other sector of the cell or a sector in another cell in accordance with a pattern.

Claims

1. A method comprising;

measuring a signal-to interference ratio for a mobile station in a first sector of a wireless communication system; and

sending, based on measuring, a request for adjustment in transmission capacity on a forward link in a second sector of the wireless communication system, the adjustment in the transmission capacity for causing an adjustment in the signal-to interference ratio for the mobile station.

2. The method of claim 1, further comprising:

generating the request in accordance with a pattern that is organized in a sequence of time slots, a time slot specifying a time in which the second sector is configured to receive and/or to send transmissions;

wherein the pattern defines sectors with transmissions turned on or off in each of the time slots.

3. The method of claim 2, wherein the pattern comprises a predetermined fixed pattern that is repeated as time passes.

4. The method of claim 1, further comprising:

determining a state of transmissions in the second sector.

5. The method of claim 4, wherein the state of transmissions comprises a scheduling status of transmissions to one or more third sectors.

6. The method of claim 5, wherein the state of transmissions comprises information about transmission rates of the second sector.

7. The method of claim 4, wherein the state of transmissions comprises next time slot usage information specifying a time in which the second sector is configured to receive and/or to send transmissions.

8. The method of claim 4, wherein the mobile station comprises a first mobile station, and wherein the state of transmissions comprises information about a forward link signal-to-interference ratio measured for a second mobile station in the second sector.

9. The method of claim 4, wherein the mobile station comprises a first mobile station, and wherein the state of transmissions comprises information about a location of a second mobile station scheduled to receive a data packet in the second sector.

10. The method of claim 4, wherein the mobile station comprises a first mobile station, and wherein the state of transmissions comprises a fairness setting for a second mobile station scheduled to receive a data packet in the second sector.

11. The method of claim 4, wherein the mobile station comprises a first mobile station, and wherein the state of transmissions comprises information about one or more of (i) an application type of a second mobile station scheduled to receive a data packet in the second sector, and (ii) a quality of service level of the second mobile station scheduled to receive the data packet in the second sector.

12. The method of claim 1, wherein the request for adjustment comprises a request for reduction.

13. The method of claim 12, wherein the request is in accordance with a pattern of turning off transmissions in other sectors to promote evenly distributed communication rates among mobile stations.

14. The method of claim 1, further comprising:

arranging a frequency reuse factor of one or higher in the wireless communication system.

15. The method of claim 1 in which the wireless communication system comprises an 1xEV-DO communication system.

16. An apparatus comprising;

a machine; and

a medium configured to store instructions that are executable by the machine to perform operations comprising;

measuring a signal-to interference ratio for a mobile station in a first sector of a wireless communication system; and

sending, based on measuring, a request for adjustment in transmission capacity on a forward link in a second sector of the wireless communication system, the adjustment in the transmission capacity for causing an adjustment in the signal-to interference ratio for the mobile station.

17. The apparatus of claim 16, wherein the operations further comprise:

controlling wireless transmission facilities for the first and the second sectors.

18. A medium configured to store instructions that are executable by a machine to perform operations comprising:

measuring a signal-to interference ratio for a mobile station in a first sector of a wireless communication system; and

sending, based on measuring, a request for adjustment in transmission capacity on a forward link in a second sector of the wireless communication system, the adjustment in the transmission capacity for causing an adjustment in the signal-to interference ratio for the mobile station.

19. The medium of claim 18, wherein the operations further comprise:

generating the request in accordance with a pattern that is organized in a sequence of time slots, a time slot specifying a time in which the second sector is configured to receive and/or to send transmissions;

wherein the pattern defines sectors with transmissions turned on or off in each of the time slots.

20. The medium of claim 18, wherein the operations further comprise:

determining a state of transmissions in the second sector.

21. The medium of claim 20, wherein the state of transmissions comprises a scheduling status of transmissions to one or more third sectors.