Abstract:
The present invention relates to a method and an apparatus for performing cooperating carrier aggregation in a plurality of base stations in heterogeneous network systems. According to the present invention, inter-base station cooperating carrier aggregation allows wireless communication to be maintained between a terminal and a base station in a heterogeneous network environment, and a frequency band of another base station with excellent signal quality can be set as a secondary component carrier with respect to the terminal for service provision. Accordingly, a service bandwidth with respect to the terminal can be expanded, and unnecessary handover overhead between the base stations can be reduced. In addition, a load of the base station with concentrated traffic can be distributed to another base station, and wireless resource use and efficiency can be increased through inter-base station sharing of available resources.
Abstract:
PURPOSE: A carrier based interference control method in a heterogeneous environment is provided to receive interference information by requesting interference information to other node. CONSTITUTION: A first node transmits a message to a second node(S410). The message includes content requiring information for an interference situation in each group of PRB(Physical Resource Block) of the second node. The first node receives a response message corresponding to the message from the second node(S420). The first node is a capacitor node which increases capacity. The second node is a coverage node which extends coverage. [Reference numerals] (AA) Start; (BB) End; (S410) First node transmit a message including content requiring information for an interference situation in PRB or in each group of PRB to the second node; (S420) Receive a response to the message
Abstract:
PURPOSE: A resource assignment device in a new generation wireless access network and a resource assignment method thereof are provided to effectively assign resources by considering interference between the cells in a wireless access network. CONSTITUTION: A terminal state information management unit(304) manages the state information of terminals. An integrated cell resource assignment priority determination unit(305) determines the resource assignment priority of the terminals based on the state information and the information of the terminals stored in the terminal state management unit. An integrated cell resource assignment unit(306) assigns the wireless resources managed by an integrated cell resource management to the terminals according to the priority determined in the integrated cell resource assignment priority determination unit. The integrated cell resource assignment unit converts the information of the integrated cell resource management unit. [Reference numerals] (301) Cell information management unit; (302) Integrated cell resource management unit; (303) Terminal information management unit; (304) Terminal state information management unit; (305) Integrated cell resource assignment priority determination unit; (306) Integrated cell resource assignment unit
Abstract:
PURPOSE: A wireless resource assignment method of a mobile communication system is provided to improve the service quality of a terminal by improving resource usage efficiency in an overlapped cell environment. CONSTITUTION: A resource assignment device receives resource assignment information of a neighbor cell generating interference between the cells. The resource assignment device divides resource assignment target resources based on the received resource assignment information. The resource assignment device assigns resources to each terminal by considering interference between the cells(S507-S509). The resource assignment information is ABS(Almost Blank Sub-frame) pattern information defined in the neighbor cell. The resource assignment device is divided into a first and a second terminal group. [Reference numerals] (AA) Start resource assignment; (BB,DD,FF,HH) Yes; (CC,EE,GG,II) No; (JJ) End; (S501) Corresponding target sub-frame = ABS ?; (S502) Apply a first weighted value to the wireless channel quality of terminals belonged to a interfered terminal group in the ABS; (S503) Apply a second weighted value to the wireless channel quality of terminals belonged to a non-interfered terminal group; (S504) Select a terminal to which a resource is assigned by considering the weighted value applied wireless channel quality and service requirements; (S505) Selected terminal = Interfered terminal ?; (S506) Assignment target sub-frame = ABS ?; (S507) Assign resources based on the wireless channel quality of the interfered terminal in the ABS; (S508) Assign resources based on the wireless channel quality of the interfered terminal in a Non-ABS; (S509) Assign resources based on the wireless channel quality of the non-interfered terminal; (S510) Is there an available resource and a resource assignment requesting terminal?
Abstract:
본 발명은 셀의 경계 영역에 설치되는 셀간 간섭 조정장치 및 셀의 경계 영역에 위치하는 이동단말에 대한 셀간 간섭 조정방법에 관한 것으로, 셀간 간섭의 주요 원인이 되는 셀의 경계 영역에 셀간 간섭 조정장치를 설치하고, 기지국이 이 셀간 간섭 조정장치의 사용 주파수 및 전송 출력을 사전에 설정된 링크(Link)를 통해 전달함으로써 셀간 간섭 조정장치가 복잡한 알고리즘을 사용하지 않고도 간단하게 셀간 간섭을 조정할 수 있도록 하여 통신 성능을 향상시킬 수 있도록 한 것이다. 이동단말, 기지국, 셀, 경계 영역, 셀간 간섭 조정
Abstract:
주파수 분할 다중화 기법을 사용하는 이동통신 시스템에서의 셀간 간섭 제어를 수행하는 무선 자원 관리 방법에 관한 것으로, 사용자 단말로부터 수신되는 정보에 기반하여 셀간 간섭이 발생했는지 여부를 판단하여, 셀간 간섭이 발생한 사용자 단말로 인접 셀과 구분되도록 해당 셀의 경계부에서 독점적으로 사용되게 설정된 주파수 대역의 자원을 할당하는 무선 자원 관리 방법에 의해 시스템 운영상 효율성을 높일 수 있으며, 셀 내의 지역에 따른 무조건적인 자원 할당 방법이 아닌 간섭을 발생시키는 셀을 인식하는 것이 가능하여, 그 셀만 제어하는 방식을 통해 보다 효율적인 자원 운영이 가능하다는 이점이 있다. ICIC, 셀간섭, OFDM
Abstract:
PURPOSE: A subframe scheduling method and system thereof in a mobile communication relay system are provided to enable a base station to change the location of a sub frame based on period information. CONSTITUTION: A base station(110) sets up sub-frame information. A relay(120) relays information transmission between the base station and a terminal. The relay executes a service based on the sub-frame information. The relay transmits period information of the service to the base station. The base station varies the sub-frame information based on period information. The base station transmits the changed sub-frame information to the relay.
Abstract:
PURPOSE: A scheduling method in a base station considering a down link control channel resource and a device thereof are provided to prevent overlap of a CCE(Control Channel Element) of a specific search space in a user terminal. CONSTITUTION: An aggregation level determining unit(11) determines an aggregation level of a common search space by considering channel quality about a plurality of user terminals. A message selecting unit(15) recognizes the number of messages necessary a common search space assignment and the number of candidates of a down link control channel according to the aggregation level. The message selecting unit selects a part of the messages according to the number of the candidates of the down link control channel.
Abstract:
PURPOSE: A method for allocating a physical uplink shared channel on a VoIP service is provided to prevent the waste of resource caused by unnecessary resource allocation by judging the resource allocation. CONSTITUTION: A base station receives from an MS(Mobile Station) a resource allocation request for uplink data transmission(S520), and recognizes an LCG(Logical Channel Group) identifier of a buffer state report within the resource allocation request(S530). If VoIP(Voice over Internet Protocol) uplink scheduling request buffer size is equal to or larger than the amount of transmission data of preset VoIP service, the base station allocates a PUSCH(Physical Uplink Shared Channel) to the terminal(S540,S550).