Inter-cell interference coordination method and apparatus for an OFDM-based heterogeneous cellular system
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H04W-004/00
H04W-072/04
H04W-052/24
H04L-005/00
출원번호
US-0182045
(2011-07-13)
등록번호
US-9049714
(2015-06-02)
우선권정보
KR-10-2010-0067590 (2010-07-13)
발명자
/ 주소
Ji, Hyoung Ju
Cho, Joon Young
출원인 / 주소
Samsung Electronics Co., Ltd
대리인 / 주소
The Farrell Law Firm, P.C.
인용정보
피인용 횟수 :
0인용 특허 :
6
초록▼
An inter-cell interference coordination method and apparatus is provided for a heterogeneous network system based on Orthogonal Frequency Division Multiplexing (OFMD) communication. The inter-cell interference coordination method and apparatus exchanges two different types of inter-cell interference
An inter-cell interference coordination method and apparatus is provided for a heterogeneous network system based on Orthogonal Frequency Division Multiplexing (OFMD) communication. The inter-cell interference coordination method and apparatus exchanges two different types of inter-cell interference coordination messages between base stations to adaptively use the frequency division and time division schemes, thereby coordinating inter-cell interference of control channels transmitted randomly in distributed manner.
대표청구항▼
1. A method for transmitting messages for inter-cell interference coordination of a source base station and a target base station in a heterogeneous cellular system, the method comprising the steps of: generating, by the source base station, first inter-cell interference coordination information and
1. A method for transmitting messages for inter-cell interference coordination of a source base station and a target base station in a heterogeneous cellular system, the method comprising the steps of: generating, by the source base station, first inter-cell interference coordination information and second inter-cell interference coordination information, the first inter-cell interference coordination information and the second inter-cell interference coordination information being associated with a first subframe and a second subframe, respectively;transmitting, by the source base station to the target base station, the first inter-cell interference coordination information, the second inter-cell interference coordination information, a resource allocation bitmap indicating an allocation structure of at least one of the first inter-cell interference coordination information and the second inter-cell interference coordination information, and time information indicating at least one of the first subframe and the second subframe; andapplying, by the source base station, the first inter-cell interference coordination information and the second inter-cell interference coordination information to the at least one of the first subframe and the second subframe. 2. The method of claim 1, wherein one of the first inter-cell interference coordination information and the second inter-cell interference coordination information is transmitted to a neighbor base station operating at a same hierarchical level, and another of the first inter-cell interference coordination information and the second inter-cell interference coordination information is transmitted to a neighbor base station operating at a different hierarchical level. 3. The method of claim 1, wherein one of the first inter-cell interference coordination information and the second inter-cell interference coordination information is transmitted for controlling the transmit power of a data channel of a subframe, and another of the first inter-cell interference coordination information and the second inter-cell interference coordination information is transmitted for controlling the transmit power of a control channel of the subframe. 4. The method of claim 3, wherein the first inter-cell interference coordination information and the second inter-cell interference coordination information includes at least one of a representative value obtained by dividing a number of Control Channel Elements (CCEs) for controlling the transmit power on the control channel by a number of CCEs corresponding to the control channel and bitmap information per Resource Element Group (REG) corresponding to the control channel. 5. A method for receiving messages for inter-cell interference coordination of a source base station and a target base station in a heterogeneous cellular system, the method comprising the steps of: receiving, by the target base station, from the source base station in a neighbor cell, a resource allocation bitmap indicating an allocation structure of at least one inter-cell interference coordination information, the at least one inter-cell interference coordination information associated with at least one subframe, and time information indicating the at least one subframe; andapplying, by the target base station, the inter-cell interference coordination information to the at least one subframe. 6. The method of claim 5, wherein the at least one inter-cell interference coordination information is destined to one of a neighbor cell operating at a same hierarchical level and a neighbor cell operating at a different hierarchical level, in the heterogeneous cellular system. 7. The method of claim 5, wherein the at least one inter-cell interference coordination information includes one of information for controlling the transmit power of a data channel of a subframe and information for controlling the transmit power of a control channel of the subframe. 8. A transmission apparatus of a source base station for controlling inter-cell interference with a target base station in a heterogeneous cellular system, comprising: a generator that generates first inter-cell interference coordination information and second inter-cell interference coordination information, the first inter-cell interference coordination information and the second inter-cell interference coordination information being associated with a first subframe and a second subframe, respectively;a transmitter that transmits, to the target base station, the first inter-cell interference coordination information, the second inter-cell interference coordination information, a resource allocation bitmap indicating an allocation structure of at least one of the first inter-cell interference coordination information and the second inter-cell interference coordination information, and time information indicating at least one of the first subframe and the second subframe; anda controller that applies the first inter-cell interference coordination information and the second inter-cell interference coordination information to the at least one of the first subframe and the second subframe. 9. The transmission apparatus of claim 8, wherein one of the first inter-cell interference coordination information and the second inter-cell interference coordination information is transmitted to a neighbor base station operating at a same hierarchical level, and another of the first inter-cell interference coordination information and the second inter-cell interference coordination information is transmitted to a neighbor base station operating at a different hierarchical level. 10. The transmission apparatus of claim 8, wherein one of the first inter-cell interference coordination information and the second inter-cell interference coordination information is transmitted for controlling the transmit power of a data channel of a subframe, and another of the first inter-cell interference coordination information and the second inter-cell interference coordination information is transmitted for controlling the transmit power of a control channel of the subframe. 11. The transmission apparatus of claim 10, wherein the one of the first inter-cell interference coordination information and the second inter-cell interference coordination information comprises at least one of: a representative value obtained by dividing a number of Control Channel Elements (CCEs) for controlling the transmit power on the control channel by a number of CCEs corresponding to the control channel; andbitmap information per Resource Element Group (REG) corresponding to the control channel. 12. A reception apparatus of a target base station for controlling inter-cell interference with a source base station in a heterogeneous cellular system, comprising: a receiver that receives, from the source base station in a neighbor cell, a resource allocation bitmap indicating an allocation structure of at least one inter-cell interference coordination information, the at least one inter-cell interference coordination information associated with at least one subframe, and time information indicating the at least one subframe; anda controller that applies the inter-cell interference coordination information to the at least one subframe. 13. The reception apparatus of claim 12, wherein at least one inter-cell interference coordination information is destined to one of a neighbor cell operating at a same hierarchical level and a neighbor cell operating at a different hierarchical level, in the heterogeneous cellular system. 14. The reception apparatus of claim 12, wherein at least one inter-cell interference coordination information includes one of information for controlling the transmit power of a data channel of a subframe and information for controlling the transmit power of a control channel of the subframe. 15. The method of claim 1, wherein the timing information comprises a bitmap indicating the at least one of the first subframe and the second subframe. 16. The method of claim 5, wherein the timing information comprises a bitmap indicating the at least one subframe. 17. The transmission apparatus of claim 8, wherein the timing information comprises a bitmap indicating the at least one of the first subframe and the second subframe. 18. The reception apparatus of claim 12, wherein the timing information comprises a bitmap indicating the at least one subframe.
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이 특허에 인용된 특허 (6)
Song, Osok; Vajapeyam, Madhavan Srinivasan; Ji, Tingfang; Damnjanovic, Aleksandar; Barbieri, Alan, Adaptive resource partitioning information (ARPI) transition behavior in heterogeneous networks.
Hiltunen, Kimmo; Nylander, Tomas; Vikberg, Jari, Systems and methods for reducing interference between and a macro base station and a femto base station.
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