Spreading code optimization based on quality factors

• US 8,325,783 B2
• Filed: 09/23/2008
• Issued: 12/04/2012
• Est. Priority Date: 09/23/2008
• Status: Active Grant

• Current Assignee: T-Mobile Innovations LLC (Deutsche Telekom AG)
• Original Assignee: Sprint Communications Company LP (Deutsche Telekom AG)
• Inventors: Raza, Syed Hassan, Mirza, Nasir Mahmood
• Primary Examiner(s): Payne, David C.
• Assistant Examiner(s): Cadeau, Wednel
• Application Number:
  US12/236,020
• Publication Number:
  US 20100074306A1
• Time in Patent Office: 1,533 Days
• Field of Search: 375/E1.001, 375/E1.002, 375/260, 375/371, 375/E1.008, 375/148, 375/E1.029, 375/146, 370/338, 370/346, 370/342, 370/503, 455/450
• US Class Current: 375/141
• CPC Class Codes: H04J 13/00 Code division multiplex systems for frequency hopping H04B1/713
• CPC Class Codes: H04J 13/16 Code allocation
• CPC Class Codes: H04W 72/0466 the resource being a scrambling code
• CPC Class Codes: H04W 72/543 based on requested quality, e.g. QoS

Abstract

What is disclosed is a method of operating a communication system. The method includes receiving a request to initiate a communication session with a wireless communication device, wherein the request indicates an application type. The method also includes determining a spreading code based on the application type, and transferring the spreading code to the wireless communication device. The method also includes receiving communications for the communication session encoded with the spreading code and decoding the encoded communications based on the spreading code.

Claims

1. A method of operating a communication system, the method comprising:

receiving a request to initiate a communication session with a wireless communication device, wherein the request indicates an application type;

determining a balanced spreading code based on a set of quality factors, and processing the balanced spreading code and the application type to determine a specialized spreading code;

transferring the specialized spreading code to the wireless communication device;

receiving communications for the communication session encoded with at least the specialized spreading code; and

decoding the encoded communications.

2. The method of operating the communication system of claim 1, further comprising:

in the wireless communication device, receiving the specialized spreading code, encoding the communications based on the specialized spreading code, and transferring the communications.

3. The method of operating the communication system of claim 1, wherein determining the specialized spreading code based on the application type comprises:

determining the specialized spreading code based on the application type and a locality of the wireless communication device.

4. The method of operating the communication system of claim 1, wherein determining the specialized spreading code based on the application type comprises:

determining the specialized spreading code based on the application type and an activity level of the wireless communication device.

5. The method of operating the communication system of claim 1, wherein determining the specialized spreading code based on the application type comprises:

determining the specialized spreading code based on the application type and an activity level of a sector of the communication system, wherein the wireless communication device is located in the sector.

6. The method of operating the communication system of claim 1, wherein determining the specialized spreading code based on the application type comprises:

determining the specialized spreading code based on the application type and a number of communication sessions active on the wireless communication device.

7. The method of operating the communication system of claim 1, wherein the set of the quality factors includes at least the quality factors of auto-correlation, cross-correlation, crest factor, and diversity.

8. The method of operating the communication system of claim 1, wherein determining the specialized spreading code based on the application type comprises optimizing the balanced spreading code for a diversity quality factor and a cross-correlation quality factor when the application type indicates voice communications.

9. The method of operating the communication system of claim 1, wherein determining the specialized spreading code based on the application type comprises optimizing the balanced spreading code for an auto-correlation quality factor and a diversity quality factor when the application type indicates web page communications.

10. The method of operating the communication system of claim 1, wherein determining the specialized spreading code based on the application type comprises optimizing the balanced spreading code for an auto-correlation quality factor and a crest factor quality factor when the application type indicates email communications.

11. A communication system comprising:

an access node configured to receive a request to initiate a communication session with a wireless communication device, wherein the request indicates an application type;

a control node configured to determine a balanced spreading code based on a set of quality factors, and process the balanced spreading code and the application type to determine a specialized spreading code;

the access node configured to transfer the specialized spreading code to the wireless communication device;

the access node configured to receive communications for the communication session encoded with at least the specialized spreading code; and

the control node configured to decode the encoded communications.

12. The communication system of claim 11, further comprising:

the wireless communication device configured to receive the specialized spreading code, encode the communications based on the specialized spreading code, and transfer the communications.

13. The communication system of claim 11, comprising:

the control node configured to determine the specialized spreading code based on the application type and a locality of the wireless communication device.

14. The communication system of claim 11, comprising:

the control node configured to determine the specialized spreading code based on the application type and an activity level of the wireless communication device.

15. The communication system of claim 11, comprising:

the control node configured to determine the specialized spreading code based on the application type and an activity level of a sector of the communication system, wherein the wireless communication device is located in the sector.

16. The communication system of claim 11, comprising:

the control node configured to determine the specialized spreading code based on the application type and a number of communication sessions active on the wireless communication device.

17. The communication system of claim 11, wherein the set of the quality factors includes at least the quality factors of auto-correlation, cross-correlation, crest factor, and diversity.

18. The communication system of claim 11, comprising:

the control node configured to optimize the balanced spreading code for a diversity quality factor and a cross-correlation quality factor when the application type indicates voice communications.

19. The communication system of claim 11, comprising:

the control node configured to optimize the balanced spreading code for an auto-correlation quality factor and a diversity quality factor when the application type indicates web page communications.

20. The communication system of claim 11, comprising:

the control node configured to optimize the balanced spreading code for an auto-correlation quality factor and a crest factor quality factor when the application type indicates email communications.