Method and apparatus for inter-cell interference coordination in a wireless communication network
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H04W-072/08
H04W-016/10
H04W-024/02
H04W-016/18
출원번호
US-0561838
(2012-07-30)
등록번호
US-9232405
(2016-01-05)
발명자
/ 주소
Dimou, Konstantinos
Lindoff, Bengt
출원인 / 주소
TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
대리인 / 주소
Murphy, Bilak & Homiller, PLLC
인용정보
피인용 횟수 :
1인용 특허 :
5
초록▼
One aspect of the teachings herein involves the advantageous use of learned statistical information to improve inter-cell interference coordination (ICIC). The network uses historical signal quality measurements collected over time for wireless communication devices operating within its coverage are
One aspect of the teachings herein involves the advantageous use of learned statistical information to improve inter-cell interference coordination (ICIC). The network uses historical signal quality measurements collected over time for wireless communication devices operating within its coverage areas to identify those geographical areas where devices generally experience significant levels of patterned interference. In an example case, the network develops a “map” of the geographical areas that are affected by the transmission patterns of neighboring nodes, and it applies the map to ICIC operations, wherein the serving nodes associated with the affected areas incorporate knowledge of the interfering transmission patterns into the ongoing scheduling of users operating in the affected areas.
대표청구항▼
1. A method of inter-cell interference coordination (ICIC) control in a wireless communication network that is configured to provide communication service to wireless communication devices, said method comprising: identifying, within a coverage area of the network, an interference zone in which wire
1. A method of inter-cell interference coordination (ICIC) control in a wireless communication network that is configured to provide communication service to wireless communication devices, said method comprising: identifying, within a coverage area of the network, an interference zone in which wireless communication devices are subject to patterned interference arising from interfering transmissions from nodes that mute their transmissions according to a particular schedule, said identifying based on signal measurement reports and corresponding positioning data obtained for the wireless communication devices during operation within the coverage area;recording location data defining the interference zone in an interference map; andproviding the interference map for use in adapting ICIC operations with respect to a wireless communication device operating in the coverage area, based on a location of the wireless communication device relative to the interference zone. 2. The method of claim 1, wherein said method includes adapting the ICIC operations with respect to the wireless communication device, as a function of a detected location of the wireless communication device relative to the interference zone. 3. The method of claim 2, wherein said step of adapting the ICIC operations comprises performing at least one of: adjusting the scheduling of transmissions to or from the wireless communication device to avoid conflicting with an identified transmission pattern of the interfering transmissions; and communicating with a network node identified as scheduling or originating the patterned interference, to coordinate the interfering transmissions with respect to scheduled transmissions to or from the wireless communication device. 4. The method of claim 2, wherein said step of adapting the ICIC operations comprises adapting a pattern of the interfering transmissions or adapting a scheduling of transmissions to or from the wireless communication device, so as to reduce concurrence between the interfering transmissions and scheduled transmissions to or from the wireless communication device. 5. The method of claim 4, wherein adapting the pattern of interfering transmissions comprises sending signaling from a first node providing service in the coverage area, to a neighboring, second node that schedules or originates the interfering transmissions. 6. The method of claim 1, wherein said step of identifying the interference zone comprises detecting times when the wireless communication devices operating within the coverage area experience excessive variance in received signal interference and recording current location data for the wireless communication devices at such times, said detecting based on evaluating the signal measurement reports from the wireless communication devices. 7. The method of claim 6, wherein said step of identifying the interference zone includes processing the recorded location data to identify a cluster of geographic locations within the coverage area associated with said excessive variance. 8. The method of claim 1, further comprising identifying a transmission pattern for the interfering transmissions, or identifying a network node that schedules or otherwise originates the patterned interference, and recording the identified transmission pattern or the identified network node as part of the data comprising the interference map. 9. The method of claim 1, wherein the signal measurement reports include implicit or explicit indications of interference variance from the wireless communication devices during operation in the coverage area, and wherein said step of identifying the interference zone includes determining that there is a cluster of geographic positions associated with signal measurement reports indicating an excessive variance in received signal interference levels. 10. The method of claim 1, wherein said step of identifying the interference zone and recording the location data for the interference zone comprises part of an interference mapping process performed by one or more nodes in the network. 11. The method of claim 10, further comprising: updating location data defining the interference zone in the interference map in dependence on new signal measurement reports; ordetecting one or more additional interference zones as new patterned interference sources are detected from new signal measurement reports. 12. The method of claim 1, wherein the interference map includes initialization data comprising location data defining a previously known interference zone within the coverage area, and wherein the identified interference zone is dynamically learned and added to the interference map. 13. A network node for use in a wireless communication network that is configured to provide communication service to wireless communication devices, said network node comprising one or more processing circuits configured to: identify, within a coverage area of the network, an interference zone in which wireless communication devices are subject to patterned interference arising from interfering transmissions from nodes that mute their transmissions according to a particular schedule, said identifying based on signal measurement reports and corresponding positioning data obtained for the wireless communication devices during operation within the coverage area;record location data defining the interference zone in an interference map; andprovide the interference map for use in adapting ICIC operations with respect to a wireless communication device operating in the coverage area, based on the location of the wireless communication device relative to the interference zone. 14. The network node of claim 13, wherein the one or more processing circuits are configured to adapt the ICIC operations with respect to the wireless communication device, as a function of a detected location of the wireless communication device relative to the interference zone. 15. The network node of claim 14, wherein the one or more processing circuits are configured to adapt the ICIC operations based on being configured to perform at least one of: adjusting the scheduling of transmissions to or from the wireless communication device to avoid conflicting with an identified transmission pattern of the interfering transmissions; and communicating with a network node identified as scheduling or originating the patterned interference, to coordinate the interfering transmissions with respect to scheduled transmissions to or from the wireless communication device. 16. The network node of claim 14, wherein the one or more processing circuits are configured to adapt the ICIC operations based on being configured to adapt a pattern of the interfering transmissions or adapt a scheduling of transmissions to or from the wireless communication device, so as to reduce concurrence between the interfering transmissions and scheduled transmissions to or from the wireless communication device. 17. The network node of claim 16, wherein the one or more processing circuits are configured to adapt the pattern of interfering transmissions based on being configured to send signaling from a first node providing service in the coverage area, to a neighboring, second node that schedules or originates the interfering transmissions. 18. The network node of claim 13, wherein the one or more processing circuits are configured to identify the interference zone based on being configured to detect times when the wireless communication devices operating within the coverage area experience excessive variance in received signal interference and record current location data for the wireless communication devices at such times, said detecting based on evaluating the signal measurement reports from the wireless communication devices. 19. The network node of claim 18, wherein the one or more processing circuits are configured to identify the interference zone based at least in part on being configured to process the recorded location data to identify a cluster of geographic locations within the coverage area associated with said excessive variance. 20. The network node of claim 13, wherein the one or more processing circuits are further configured to identify a transmission pattern for the interfering transmissions, or identify a network node that schedules or otherwise originates the patterned interference, and record the identified transmission pattern or the identified network node as part of the data comprising the interference map. 21. The network node of claim 13, wherein the signal measurement reports include implicit or explicit indications of interference variance from wireless communication devices during operation in the coverage area, and wherein the one or more processing circuits are configured to identify the interference zone based on being configured to determine that there is a cluster of geographic positions associated with signal measurement reports indicating an excessive variance in received signal interference levels. 22. The network node of claim 13, wherein the one or more processing circuits are configured to identify the interference zone and record the location data for the interference zone as part of an interference mapping process performed by one or more network nodes in the network. 23. The network node of claim 22, wherein the one or more processing circuits are configured to: update location data defining the interference zone in the interference map in dependence on new signal measurement reports; ordetect one or more additional interference zones as new patterned interference sources are detected from new signal measurement reports. 24. The network node of claim 13, wherein the interference map includes initialization data comprising location data defining a previously known interference zone within the coverage area, and wherein the identified interference zone is dynamically learned and added to the interference map.
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이 특허에 인용된 특허 (5)
Wei, Xusheng; Cai, Zhijun; Young, Gordon, Apparatus and method for providing uplink interference coordination in a radio communication system.
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