Pulse or digital communications – Systems using alternating or pulsating current – Antinoise or distortion
Reexamination Certificate
1999-11-19
2001-08-21
Pham, Chi (Department: 2631)
Pulse or digital communications
Systems using alternating or pulsating current
Antinoise or distortion
C455S069000, C455S522000
Reexamination Certificate
active
06278742
ABSTRACT:
TECHNICAL FIELD OF THE INVENTION
This invention relates generally to the field of telecommunications and, more specifically, to a method and system for power-conserving interference avoidance in communication between a mobile unit and a base unit in a wireless telecommunication system.
BACKGROUND OF THE INVENTION
As society grows more complex and operates at an ever accelerating pace, there has been a growing need for better and more flexible communication devices. One area that has experienced substantial development activity is the area of wireless communication. Wireless telephone systems are also known as portable, cordless or mobile telephone systems. A typical wireless communication system has a base station located at a customer's or user's premises. The base is connected to the Public Switched Telephone Network (PSTN) over a wireline interface and communicates with a mobile unit or handset over an air interface that permits the user to communicate remotely from the base station. While users desire the freedom and flexibility afforded by mobile wireless communications systems, they typically do not want to sacrifice the numerous features, such as caller ID, that are available through the wireline service over the PSTN. In addition, users of wireless systems increasingly demand a voice quality that is as good as the voice quality available over a wireline link.
In the past, the enhanced features and high voice quality demanded by users have been achieved by the use of sophisticated and complex algorithms and methods that require substantial processor resources and large amounts of memory. These processing and memory resources are not only expensive but also place a substantial drain on battery power, therefore shortening the effective use of the mobile unit. Other technical problems associated with the need for using faster and more powerful processors include larger packaging to accommodate the larger-sized components and to dissipate the heat generated by such units. In the past, wireless systems have been large and bulky and have weighed more than what is satisfactory to many users.
While wireless communication devices and methods have provided an improvement over prior approaches in terms of features, voice quality, cost, packaging size and weight, the challenges in the field of wireless telecommunications have continued to increase with demands for more and better techniques having greater flexibility and adaptability.
Therefore, a need has arisen for a new method and system for power-conserving interference avoidance in communication between a base unit and a mobile unit in a wireless telecommunication system.
SUMMARY OF THE INVENTION
In accordance with the present invention, a method and system for power-conserving interference avoidance in communication between a mobile unit and a base unit in a wireless telecommunication system are provided that substantially eliminate or reduce disadvantages and problems associated with previously developed systems and methods.
A method for avoiding interference in a wireless telecommunication system is disclosed. 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.
Technical advantages of the present invention include providing for power-conserving interference avoidance in communication between a mobile unit and a base unit in a telecommunication system. In particular, a slow hop count for a first component includes a summation of consecutive line quality indicators. A determination is made as to whether to change communication frequencies for the first component when the slow hop count is greater than a slow hop threshold. This determination is based on a power level of a second component and a communication strength received from the second component at the first component. Accordingly, a change in communication frequencies is made after evaluating whether interference is causing the poor line quality indicated by the slow hop count, as opposed to other factors such as low power for signal transmission. As a result, interference is avoided while power is conserved by providing for transmitting at lower power levels as long as good quality signals are being received.
Other technical advantages of the present invention will be readily apparent to one skilled in the art from the following figures, descriptions and claims.
REFERENCES:
patent: 5257283 (1993-10-01), Gilhousen et al.
patent: 5265119 (1993-11-01), Gilhousen et al.
patent: 5267262 (1993-11-01), Wheatley, III
patent: 5485486 (1996-01-01), Gilhousen et al.
patent: 5812938 (1998-09-01), Gilhousen et al.
patent: 5933781 (1999-08-01), Willenegger et al.
patent: 5943610 (1999-08-01), Endo
Guan Sheng
Kockmann Juergen
Sastrodjojo Paulus
Sydon Uwe
Corrielus Jean B.
Pham Chi
Siemens Information and Communication Mobile LLC.
LandOfFree
Method and system for power-conserving interference... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and system for power-conserving interference..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and system for power-conserving interference... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2545987