Method and system for power-conserving interference avoidance in communication between a mobile unit and a base unit in a wireless telecommunication system

• US 20010028685A1
• Filed: 06/18/2001
• Published: 10/11/2001
• Est. Priority Date: 11/19/1999
• Status: Active Grant

• Current Assignee: Siemens AG
• Original Assignee: Siemens Information And Communication Mobile LLC (Siemens AG)
• Inventors: Kockman, Juergen, Sydon, Uwe, Sastrodjojo, Paulus
• Granted Patent: US 7,224,745 B2
• Time in Patent Office: Days
• US Class Current: 375/285
• CPC Class Codes: H04W 52/08 Closed loop power control
• CPC Class Codes: H04W 52/24 using SIR [Signal to Interference Ratio] or other wireless path parameters
• CPC Class Codes: H04W 52/42 in systems with time, space, frequency or polarisation diversity
• CPC Class Codes: H04W 52/50 at the moment of starting communication in a multiple access environment

Abstract

A method for avoiding interference in a wireless telecommunication system is provided. The method includes providing communication between a first and second component at an initial frequency. A plurality of successive line quality indicators is determined at a line quality monitor of the first component. Consecutive line quality indicators are summed over a predetermined time to determine a slow hop count. A determination is made as to whether the slow hop count is greater than a slow hop threshold. A determination is made as to whether to provide communication with the first component at a second frequency when the slow hop count is greater than the slow hop threshold. This determination is based on a power level of the second component and a communication strength received from the second component at the first component. A signal is communicated from the first component to the second component requesting the second component to provide communication at the second frequency.

Claims

1. A method for avoiding interference in a wireless telecommunication system, comprising:

providing communication between a first and second component at an initial frequency;

determining a plurality of successive line quality indicators at a line quality monitor of the first component;

summing consecutive line quality indicators over a predetermined time to determine a slow hop count;

determining whether the slow hop count is greater than a slow hop threshold;

determining whether to provide communication with the first component at a second frequency when the slow hop count is greater than the slow hop threshold, the determination based on a power level of the second component and a communication strength received from the second component at the first component; and

communicating a signal from the first component to the second component requesting the second component to provide communication at the second frequency.

2. The method of

claim 1

, the first component comprising a mobile unit and the second component comprising a base unit.

3. The method of

claim 1

, the first component comprising a base unit and the second component comprising a mobile unit.

4. The method of

claim 1

, further comprising providing communication with the first component at the second frequency when a specified number of consecutive line quality indicators is greater than a fast hop threshold.

5. The method of

claim 4

, the first component comprising a mobile unit and the second component comprising a base unit.

6. The method of

claim 4

, the first component comprising a base unit and the second component comprising a mobile unit.

7. A system for avoiding interference in a wireless telecommunication system, comprising:

a first component;

a second component for providing wireless communication with the first component at an initial frequency;

a line quality monitor for the first component, the line quality monitor for determining a plurality of successive line quality indicators;

a slow hop counter for summing consecutive line quality indicators over a predetermined time to determine a slow hop count and for determining whether the slow hop count is greater than a slow hop threshold;

an error detector for determining whether to provide communication with the first component at a second frequency when the slow hop count is greater than the slow hop threshold, the determination based on a power level of the second component and a communication strength received from the second component at the first component, and

the first component operable to communicate a signal to the second component requesting the second component to provide communication at the second frequency.

8. The system of

claim 7

, the first component comprising a mobile unit and the second component comprising a base unit.

9. The system of

claim 7

, the first component comprising a base unit and the second component comprising a mobile unit.

10. The system of

claim 7

, further comprising:

a fast hop counter for monitoring a number of consecutive line quality indicators greater than a fast hop threshold to determine a fast hop count; and

the error detector also for providing communication with the first component at the second frequency when the fast hop count is greater than a fast hop value.

11. The system of

claim 10

, the first component comprising a mobile unit and the second component comprising a base unit.

12. The system of

claim 10

, the first component comprising a base unit and the second component comprising a mobile unit.

13. A method for conserving power in a wireless communication system, comprising:

providing communication between a first and second component;

transmitting an initial signal from the first component to the second component at a first power level;

receiving the initial signal from the first component at the second component;

determining a communication strength for the initial signal at the second component; and

transmitting from the second component to the first component a request for the first component to transmit a subsequent signal at a second power level, the second power level based on the communication strength for the initial signal.

14. The method of

claim 13

, the communication strength greater than a desired range and the second power level less than the first power level.

15. The method of

claim 13

, the communication strength less than a desired limit and the second power level greater than the first power level.

16. The method of

claim 13

, the first component comprising a mobile unit and the second component comprising a base unit.

17. The method of

claim 13

, the first component comprising a base unit and the second component comprising a mobile unit.