Base station using global channel power control

• US 6,456,828 B1
• Filed: 10/29/2001
• Issued: 09/24/2002
• Est. Priority Date: 02/12/1997
• Status: Expired due to Term

• Current Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Original Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Inventors: Ozluturk, Fatih M.
• Primary Examiner(s): LE, THANH C
• Application Number:
  US10/046,025
• Publication Number:
  US 20020106990A1
• Time in Patent Office: 330 Days
• Field of Search: 455/68, 455/69, 455/70, 455/522, 455/550, 455/561, 455/575, 455/115, 455/126, 455/127
• US Class Current: 455/69
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements
• CPC Class Codes: H04W 52/143 Downlink power control
• 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
• CPC Class Codes: H04W 52/32 TPC of broadcast or control channels
• CPC Class Codes: H04W 52/322 Power control of broadcast channels
• CPC Class Codes: H04W 52/343 taking into account loading or congestion level
• CPC Class Codes: H04W 52/346 distributing total power among users or channels
• CPC Class Codes: H04W 84/042 Public Land Mobile systems, e.g. cellular systems
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

A base station for use in a wireless spread spectrum communication system produces at least one channel signal and a global signal. The at least one channel and global signals are combined. The combined signal is transmitted. A desired transmit power level of the global signal is determined using a transmit power level of the combined signal. A transmit power level of the global signal is adjusted using the desired transmit power level.

Claims

1. A base station for use in a wireless spread spectrum communication system, the base station comprising:

means for producing at least one channel signal and a global signal;

means for combining the at least one channel and global signals;

means for transmitting the combined signal;

means for determining a desired transmit power level of the global signal using a transmit power level of the combined signal; and

means for adjusting a transmit power level of the global signal to the desired transmit power level.

2. The base station of claim 1 wherein the at least one channel signal is a plurality of channel signals.

3. The base station of claim 1 wherein the desired transmit power level is determined using the combined signal transmit power level and a distance to an edge of a cell.

4. The base station of claim 1 wherein the desired transmit power level is determined using a free space propagation model.

5. The base station of claim 1 wherein the desired transmit power level is determined using a data propagation model.

6. The base station of claim 1 wherein the determined global channel transmit power is determined using a break point propagation model.

7. A base station for use in a wireless spread spectrum communication system, the base station comprising:

a plurality of modems for producing at least one channel signal and a global signal;

a signal combiner for combining the at least one channel and global signals;

a radio frequency transmitter for transmitting the combined signal;

a global power control processor for determining a desired transmit power level of the global signal using a transmit power level of the combined signal; and

a power controller associated with the global signal for adjusting a transmit power level of the global signal to the desired transmit power level.

8. The base station of claim 7 wherein the at least one channel signal is a plurality of channel signals.

9. The base station of claim 7 wherein the desired transmit power level is determined using the combined signal transmit power level and a distance to an edge of a cell.

10. The base station of claim 7 wherein the desired transmit power level is determined using a free space propagation model.

11. The base station of claim 7 wherein the desired transmit power level is determined using a data propagation model.

12. The base station of claim 7 wherein the determined global channel transmit power is determined using a break point propagation model.

13. A method for use in a wireless communication system, the method comprising:

a base station producing at least one channel signal and a global signal;

combining the at least one channel and global signals;

transmitting the combined signal;

determining a desired transmit power level of the global signal using a transmit power level of the combined signal; and

adjusting a transmit power level of the global signal to the desired transmit power level.

14. The method of claim 13 wherein the at least one channel signal is a plurality of channel signals.

15. The method of claim 13 wherein the desired transmit power level is determined using the combined signal transmit power level and a distance to an edge of a cell.

16. The method of claim 13 wherein the desired transmit power level is determined using a free space propagation model.

17. The method of claim 13 wherein the desired transmit power level is determined using a data propagation model.

18. The method of claim 13 wherein the determined global channel transmit power is determined using a break point propagation model.