[특허]Congestion control in a CDMA-based mobile radio communications system

Telefonaktiebolaget LM Ericsson (publ)

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Congestion control in a CDMA-based mobile radio communications system

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04Q-007/20
미국특허분류(USC)	455/453; 455/422.1; 455/423; 455/522; 370/310
출원번호	US-0012250 (2001-12-11)
발명자 / 주소	Spaling,Gerke Aschermann,Benedikt
출원인 / 주소	Telefonaktiebolaget LM Ericsson (publ)
대리인 / 주소	Nixon &
인용정보	피인용 횟수 : 55 인용 특허 : 30

초록
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A load condition of a cell is determined without having to measure one or more radio parameters pertaining to the cell load, e.g., interference level. Based upon that determined load condition, a traffic condition of the cell may then be regulated, e.g., admission and/or congestion control, transmit power control, etc. The load condition is determined simply and accurately by observing the value (absolute or weighted) of transmit power control commands issued in the cell over a particular time period. To identify potential "false alarms" of increased cell loads, a radio parameter associated with another frequency band in another cellular system that impacts the load condition of the cell in the current cellular system is measured. A traffic condition in that cell is regulated based upon the determined load condition in the cell taking into account the measured radio parameter.

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What is claimed is: 1. For use in a first cellular mobile radio communications system supporting communications over a radio interface between a radio network and mobile terminals, a method comprising: determining a load condition of a cell in the first cellular mobile radio communications system, determining a radio parameter associated with a second cellular mobile radio communications system impacting the load condition of the cell; and regulating a traffic condition in the cell based on the determined load condition and the determined radio parameter, wherein the load condition is detmined without having to measure a radio parameter and is based on issued transmit power control commands. 2. The method in claim 1, wherein the determining of the load condition of a cell without having to measure a radio parameter includes monitoring a number of increase transmit power commands issued in a cell over a time period relative to a total number of transmit power commands issued in the cell for that time period. 3. The method in claim 1, further comprising: weighting each issued transmit power control command, and determining the load condition based on the weighted commands. 4. The method in claim 1, wherein the traffic condition is an interference level in the cell, the method further comprising: controlling the interference level using the determined load situation and the determined radio parameter. 5. The method in claim 1, wherein the traffic condition is transmit power level, the method further comprising: controlling a transmit power of a base station or a channel in the cell using the determined load situation and the determined radio parameter. 6. The method in claim 1, wherein the traffic condition is transmit power, the method further comprising: controlling the transmit power of a mobile station using the determined load situation and the determined radio parameter. 7. The method in claim 1, wherein the determining of the radio parameter includes measuring a value of the radio parameter associated with a second cellular mobile radio communications system. 8. The method in claim 7, wherein the measured value is a received power or interference level from the second cellular mobile radio communications system. 9. The method in claim 8, wherein the traffic condition in the cell is regulated in a first fashion if the load condition is attributable to at least a first extent to the second cellular mobile radio communications system, and in a second fashion if the load condition is not attributable to at least the first extent to the second cellular mobile radio communications system. 10. The method in claim 8, wherein the received power or interference level from the second cellular mobile radio communications system is associated with an uplink transmission of a mobile radio associated with the second cellular mobile radio communications system. 11. The method in claim 10, further comprising: detecting a power of the uplink transmission; filtering the detected power to provide a first filter value; and determining if the filtered power exceeds the threshold. 12. The method in claim 11, further comprising: measuring an uplink transmit power in the first cellular mobile radio communications system; filtering the measured power to provide a second filter value; correlating the first and second filter values to provide a correlator output; and determining if the correlator output exceeds the threshold. 13. The method in claim 7, further comprising: measuring a value associated with the load condition in the first cellular mobile radio communications system, and using the measured load condition value, the determined load condition, and the determined radio parameter to regulate the traffic condition in the cellular mobile radio communications system. 14. For use in a first cellular mobile radio communications system supporting communications over a radio interface between a radio network and mobile terminals, a method comprising: determining a load condition of a cell, where radio communications in the cell are conducted within a first frequency band; determining a radio parameter for a transmission in a second frequency band impacting the load condition of the cell; and regulating a traffic condition in the cell based on the determined load condition and the determined radio parameter, wherein the load condition is determined without having to measure a radio parameter and is based on issued transmit power control commands. 15. The method in claim 14, wherein the first and second frequency bands are adjacent frequency bands. 16. The method in claim 14, wherein the first frequency band belongs to an operator of the first cellular mobile radio communications system and the second frequency band belongs to a second cellular mobile radio communications system operator. 17. The method in claim 14, wherein the determining of the load condition of a cell without having to measure a radio parameter includes monitoring a number of increase transmit power commands issued in a cell over a time period relative to a total number of transmit power commands issued in the cell for that time period. 18. The method in claim 14, wherein the radio parameter is determined by measurement, the method further comprising: if a measured radio parameter associated with the second cellular mobile radio communications system exceeds a threshold, determining that at least some of the load condition of the cell in the first frequency band is attributable to a transmission in the second cellular frequency band. 19. The method in claim 14, wherein the traffic condition in the cell is regulated in a first fashion if the load condition is attributable to at least a first extent to the second frequency band transmission, and in a second fashion if the load condition is not attributable to at least the first extent to the second frequency band transmission. 20. The method in claim 14, wherein the radio parameter is a power level associated with a mobile radio uplink transmission associated with the second frequency band. 21. The method in claim 20, further comprising: detecting a power of the uplink transmission associated with the second frequency band; filtering the detected power to provide a first filter value; and determining if the filtered power exceeds a threshold. 22. The method in claim 21, further comprising: measuring an uplink transmit power in the first frequency band; filtering the measured power to provide a second filter value; correlating the first and second filter values to provide a correlator output; and determining if the correlator output exceeds the threshold. 23. For use in a cellular mobile radio communications system supporting communications over a radio interface between a radio network and mobile terminals, apparatus comprising electronic circuitry configured to: determine a load condition of a cell, where radio communications in the cell are conducted within a first frequency band, and determine a radio parameter for a transmission in a second frequency band impacting the load condition of the cell, and a controller configured to regulate a traffic condition in the cell based on the determined load condition and the determined radio parameter, wherein the load condition is determined without having to measure a radio parameter and is based on issued transmit power control commands. 24. The apparatus in claim 23, wherein the first and second frequency bands are adjacent frequency bands. 25. The apparatus in claim 23, wherein the first frequency band belongs to an operator of the first cellular mobile radio communications system operator and the second frequency band belongs to a second cellular mobile radio communications system operator. 26. The apparatus in claim 23, wherein electronic circuitry includes a counting mechanism for monitoring a number of increase transmit power commands issued in a cell over a time period relative to a total number of transmit power commands issued in the cell for that time period. 27. The apparatus in claim 23, further comprising: a sensor for measuring a received power of the transmission in a second frequency band, wherein if the measured power exceeds a threshold, the controller is configured to determine that at least some of the load condition of the cell in the first cellular mobile radio communications system is attributable to the second cellular mobile radio communications system. 28. The apparatus in claim 23, wherein the controller is configured to regulate the traffic condition in the cell in a first fashion if the load condition is attributable to at least a first extent to the second frequency band transmission, and in a second fashion if the load condition is not attributable to at least the first extent to the second frequency band transmission. 29. The apparatus in claim 23, wherein the radio parameter is a power level associated with a mobile radio uplink transmission in the second frequency band. 30. The apparatus in claim 29, further comprising: a detector for detecting a power of the uplink transmission associated with the second frequency band; and a first filter for filtering the detected power to provide a first filter value, wherein the controller is configured to determine if the filtered power exceeds a threshold. 31. The apparatus in claim 30, further comprising: a sensor for measuring an uplink transmit power in the first frequency band; a second filter for filtering the measured power to provide a second filter value; and a correlator for correlating the first and second filter values to provide a correlator output, wherein the controller is configured to determine if the correlator output exceeds the threshold. 32. For use in a first cellular mobile radio communications system supporting communications over a radio interface between a radio network and mobile terminals, apparatus comprising: means for determining a load condition of a cell in the first cellular mobile radio communications system, means for determining a radio parameter associated with a second cellular mobile radio communications system impacting the load condition of the cell; and means for regulating a traffic condition in the cell based on the determined load condition and the determined radio parameter, wherein the means for determining monitors a number of increase transmit power commands issued in a cell over a time period relative to a total number of transmit power commands issued in the cell for that time period. 33. The apparatus in claim 32, further comprising: means for weighting each issued transmit power control command, wherein the means for determining determines the load condition based on the weighted commands. 34. The apparatus in claim 32, wherein the traffic condition is an interference level in the cell, and the means for regulating includes a means for controlling the interference level using the determined load situation and the determined radio parameter. 35. The apparatus in claim 32, wherein the traffic condition is an interference level in the cell, and the means for regulating includes a means for controlling a transmit power of a base station or a mobile radio in the cell using the determined load situation and the determined radio parameter. 36. For use in a first cellular mobile radio communications system supporting communications over a radio interface between a radio network and mobile terminals, apparatus comprising: means for determining a load condition of a cell in the first cellular mobile radio communications systems, means for determining a radio parameter associated with a second cellular mobile radio communications system impacting the load condition of the cell; and means for regulating a traffic condition in the cell based on the determined load condition and the determined radio parameter, a sensor for measuring a received power associated with a second cellular mobile radio communications system. 37. The apparatus in claim 36, wherein the received power is associated with an uplink transmission of a mobile radio associated with the second cellular mobile radio communications system. 38. The apparatus in claim 37, further comprising: first means for filtering the detected power to provide a first filter value; and means for determining if the filtered power exceeds a threshold. 39. The apparatus in claim 38, further comprising: means for measuring an uplink transmit power in the first cellular mobile radio communications system; second means for filtering the measured power to provide a second filter value; means for correlating the first and second filter values to provide a correlator output; and means for determining if the correlator output exceeds the threshold. 40. For use in a first cellular mobile radio communications system supporting communications over a radio interface between a radio network and mobile terminals, a method comprising: determining a load condition of a cell in the first cellular mobile radio communications system, determining a radio parameter associated with a second cellular mobile radio communications system impacting the load condition of the cell; and regulating a traffic condition in the cell based on the determined load condition and the determined radio parameter, wherein if a measured received power or interference level associated with the second cellular mobile radio communications system exceeds a threshold, the method further comprises: determining that at least some of the load condition of the cell in the first cellular mobile radio communications system is attributable to the second cellular mobile radio communications system.

이 특허에 인용된 특허 (30)

이 특허를 인용한 특허 피인용횟수: 55

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Congestion control in a CDMA-based mobile radio communications system

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