Dynamic sectors in a wireless communication system

• US 8,670,778 B2
• Filed: 09/16/2009
• Issued: 03/11/2014
• Est. Priority Date: 09/29/2008
• Status: Expired due to Fees

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Tang, Rilun, Ahsan, Syed Nadeem, Si, Jie
• Primary Examiner(s): Eisner, Ronald
• Application Number:
  US12/561,042
• Publication Number:
  US 20100081439A1
• Time in Patent Office: 1,637 Days
• Field of Search: 455436-444, 455450-455, 455/422.1, 455/464, 455/509, 455/63.4, 455/82, 455/83, 455/561, 455/562.1, 455/575.7, 370431-463, 370321-337, 370/339, 370341-348
• US Class Current: 455/453
• CPC Class Codes: H04W 16/04 Traffic adaptive resource partitioning
• CPC Class Codes: H04W 36/22 for handling the traffic

Abstract

A method for dynamic sector creation is disclosed. The method may include determining that a first sector of a cell is overloaded. The method may also include creating a second sector within the first sector. The method may further include transferring one or more mobile stations from the first sector to the second sector.

Claims

1. A method for dynamic sector creation, comprising:

determining that a first sector of a cell is overloaded, wherein the first sector uses a first pseudo noise (PN) code;

upon determining that the first sector of the cell is overloaded, creating a second sector of the cell within the first sector, wherein the second sector uses a second PN code that is different from the first PN code; and

transferring one or more mobile stations from the first sector to the second sector,

wherein determining that the first sector of the cell is overloaded comprises comparing the load of the first sector with a loading threshold, wherein the first sector is overloaded if the load of the first sector is greater than the loading threshold.

2. The method of claim 1, wherein determining that the first sector of the cell is overloaded comprises comparing the load of the first sector with a loading threshold, wherein the first sector is overloaded if the load of the first sector is greater than the loading threshold.

3. The method of claim 1, further comprising:

communicating with two or more mobile stations as part of the first sector using a multiple beam antenna;

identifying one or more beams of the multiple beam antenna to use in the second sector;

identifying one or more mobile stations communicating with the identified one or more beams for use in the second sector; and

sending a handoff message to the one or more mobile stations.

4. The method of claim 3, further comprising reallocating the one or more beams to operate as the second sector.

5. The method of claim 4, further comprising communicating with the identified one or more mobile stations as part of the second sector using the reallocated one or more beams.

6. The method of claim 4, further comprising allocating resources from a donor cell, wherein allocating resources from a donor cell comprises:

selecting a cell with less load within repeater range to operate as the donor cell for the second sector; and

relaying communications between the donor cell and mobile stations in the second sector.

7. The method of claim 4, wherein communicating with two or more mobile stations as part of the first sector comprises using the first pseudo noise (PN) code, and wherein reallocating the one or more beams to operate as the second sector comprises using the second PN code by the one or more beams to operate as the second sector.

8. The method of claim 1, wherein the method is performed by a base station.

9. The method of claim 3, wherein the handoff message is selected from the group consisting of a universal handoff direction message (UHDM), an extended handoff direction message and an active set update message.

10. The method of claim 2, wherein the loading threshold is based on at least one of the following:

a number of mobile stations, a reverse signal power, handoff statistics, a reverse pilot report, sector noise floor and sector voice activity in a sector.

11. The method of claim 1, further comprising:

communicating with one or more mobile stations as part of the first sector;

communicating with one or more mobile stations as part of the second sector;

transferring one or more mobile stations from the second sector to the first sector; and

removing the second sector.

12. The method of claim 11, further comprising comparing a load of the first sector and second sector with a minimum loading threshold, and identifying one or more beams of the second sector to return to the first sector if the load is less than the minimum loading threshold.

13. The method of claim 12, further comprising identifying the mobile stations communicating with the identified one or more beams of the second sector.

14. The method of claim 13, wherein removing the second sector comprises combining the identified one or more beams to operate as part of the first sector.

15. A base station configured for dynamic sector creation comprising:

a processor;

memory in electronic communication with the processor;

instructions stored in the memory, the instructions being executable by the processor to;

determine that a first sector of a cell is overloaded, wherein the first sector uses a first pseudo noise (PN) code;

upon determining that the first sector of the cell is overloaded, create a second sector of the cell within the first sector, wherein the second sector uses a second PN code that is different from the first PN code; and

transfer one or more mobile stations from the first sector to the second sector,

wherein determining that the first sector of the cell is overloaded comprises comparing the load of the first sector with a loading threshold, wherein the first sector is overloaded if the load of the first sector is greater than the loading threshold.

16. The base station of claim 15, wherein determining that the first sector of the cell is overloaded comprises comparing the load of the first sector with a loading threshold, wherein the first sector is overloaded if the load of the first sector is greater than the loading threshold.

17. The base station of claim 15, wherein the instructions are further executable to:

communicate with two or more mobile stations as part of the first sector using a multiple beam antenna;

identify one or more beams of the multiple beam antenna to use in the second sector;

identify one or more mobile stations communicating with the identified one or more beams for use in the second sector; and

send a handoff message to the one or more mobile stations.

18. The base station of claim 17, wherein the instructions are further executable to reallocate the one or more beams to operate as the second sector.

19. The base station of claim 18, wherein the instructions are further executable to communicate with the identified one or more mobile stations as part of the second sector using the reallocated one or more beams.

20. The base station of claim 18, wherein the instructions are further executable to allocate resources from a donor cell, wherein allocating resources from a donor cell comprises:

selecting a cell with less load within repeater range to operate as a donor cell for the second sector; and

relaying communications between the donor cell and mobile stations in the second sector.

21. The base station of claim 18, wherein communicating with two or more mobile stations as part of the first sector comprises using the first pseudo noise (PN) code, and wherein reallocating the one or more beams to operate as the second sector comprises using the second PN code by the one or more beams to operate as the second sector.

22. The base station of claim 17, wherein the handoff message is selected from the group consisting of a universal handoff direction message (UHDM), an extended handoff direction message and an active set update message.

23. The base station of claim 16, wherein the loading threshold is based on at least one of the following:

a number of mobile stations, a reverse signal power, handoff statistics, a reverse pilot report, sector noise floor and sector voice activity in a sector.

24. The base station of claim 15, wherein the instructions are further executable to:

communicate with one or more mobile stations as part of the first sector;

communicate with one or more mobile stations as part of the second sector;

transfer one or more mobile stations from the second sector to the first sector; and

remove the second sector.

25. The base station of claim 24, wherein the instructions are further executable to compare a load of the first sector and second sector with a minimum loading threshold, and identify one or more beams of the second sector to return to the first sector if the load is less than the minimum loading threshold.

26. The base station of claim 25, wherein the instructions are further executable to identify the mobile stations communicating with the identified one or more beams of the second sector.

27. The base station of claim 26, wherein removing the second sector comprises combining the identified one or more beams to operate as part of the first sector.

28. An apparatus for dynamic sector creation, comprising:

means for determining that a first sector of a cell is overloaded, wherein the first sector uses a first pseudo noise (PN) code;

means for, upon determining that the first sector of the cell is overloaded, creating a second sector of the cell within the first sector, wherein the second sector uses a second PN code that is different from the first PN code; and

means for transferring one or more mobile stations from the first sector to the second sector,

wherein determining that the first sector of the cell is overloaded comprises comparing the load of the first sector with a loading threshold, wherein the first sector is overloaded if the load of the first sector is greater than the loading threshold.

29. A non-transitory computer-program product for a wireless device configured for dynamic sector creation, the computer-program product comprising a non-transitory computer-readable storage medium having instructions thereon, the instructions comprising:

code for determining that a first sector of a cell is overloaded, wherein the first sector uses a first pseudo noise (PN) code;

code for, upon determining that the first sector of the cell is overloaded, creating a second sector of the cell within the first sector, wherein the second sector uses a second PN code that is different from the first PN code; and

code for transferring one or more mobile stations from the first sector to the second sector,

wherein determining that the first sector of the cell is overloaded comprises comparing the load of the first sector with a loading threshold, wherein the first sector is overloaded if the load of the first sector is greater than the loading threshold.

30. An apparatus for dynamic sector allocation, comprising:

means for determining that a first sector of a cell is overloaded, wherein the first sector uses a first pseudo noise (PN) code;

means for, upon determining that the first sector of the cell is overloaded, creating a second sector of the cell within the first sector, wherein the second sector uses a second PN code that is different from the first PN code;

means for building connections between the second sector and a donor cell; and

means for transferring one or more mobile stations from the first sector to the second sector,

wherein determining that the first sector of the cell is overloaded comprises comparing the load of the first sector with a loading threshold, wherein the first sector is overloaded if the load of the first sector is greater than the loading threshold.

31. A non-transitory computer-program product for a wireless device configured for dynamic sector creation, the computer-program product comprising a non-transitory computer-readable storage medium having instructions thereon, the instructions comprising:

code for determining that a first sector of a cell is overloaded, wherein the first sector uses a first pseudo noise (PN) code;

code for, upon determining that the first sector of the cell is overloaded, creating a second sector of the cell within the first sector, wherein the second sector uses a second PN code that is different from the first PN code;

code for building connections between the second sector and a donor cell; and

code for transferring one or more mobile stations from the first sector to the second sector,

wherein determining that the first sector of the cell is overloaded comprises comparing the load of the first sector with a loading threshold, wherein the first sector is overloaded if the load of the first sector is greater than the loading threshold.