WO2013129505A1 - 移動通信システム、基地局、及びユーザ端末 - Google Patents
移動通信システム、基地局、及びユーザ端末 Download PDFInfo
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- WO2013129505A1 WO2013129505A1 PCT/JP2013/055203 JP2013055203W WO2013129505A1 WO 2013129505 A1 WO2013129505 A1 WO 2013129505A1 JP 2013055203 W JP2013055203 W JP 2013055203W WO 2013129505 A1 WO2013129505 A1 WO 2013129505A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/022—Site diversity; Macro-diversity
- H04B7/024—Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0032—Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
- H04L5/0035—Resource allocation in a cooperative multipoint environment
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
- H04W16/10—Dynamic resource partitioning
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/16—Arrangements for providing special services to substations
- H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
- H04L12/189—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast in combination with wireless systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/24—Cell structures
- H04W16/30—Special cell shapes, e.g. doughnuts or ring cells
Definitions
- the present invention relates to a mobile communication system, a base station, and a user terminal with improved throughput in a cell boundary region.
- CoMP positions antenna groups arranged at the same place as one “point”, and a plurality of points cooperate to communicate with a user terminal.
- a point group that performs cooperative communication with a user terminal using one time / frequency resource is referred to as a CoMP cooperating set (CoMP cooperating set).
- Intra-Site CoMP As one form of CoMP. Intra-Site CoMP considers each cell as a “point” when a user terminal is located in the boundary area of a plurality of cells belonging to one base station, and the plurality of cells perform CoMP communication with the user terminal. Do. Thereby, the throughput in the cell boundary region can be improved.
- cell is used as a term indicating a function of performing wireless communication with a user terminal in addition to being used as a term indicating a unit of a wireless communication area.
- a “cell” may also be referred to as a “sector”.
- CoMP has a problem that communication control for cooperation in the plurality of cells is complicated in addition to the time and frequency resources of each of the plurality of cells corresponding to the plurality of points.
- an object of the present invention is to provide a mobile communication system, a base station, and a user terminal that can improve the throughput in the cell boundary region without performing complicated communication control.
- the present invention has the following features.
- the mobile communication system of the present invention is a mobile communication system having a plurality of predetermined cells adjacent to each other, and has a spare cell that covers a boundary area of the plurality of predetermined cells, and the plurality of predetermined cells are predetermined
- the first radio frame has a configuration different from that of the first radio frame so that the spare cell shares the predetermined frequency band with the plurality of predetermined cells in a time division manner. 2 radio frames are used.
- the user terminal When the user terminal is located in the boundary area and the plurality of default cells and the spare cell belong to the same base station, the user terminal preferably performs non-CoMP communication with the spare cell.
- the user terminal When the user terminal is located in the boundary area, when the plurality of default cells belong to different base stations, the user terminal preferably performs CoMP communication with the plurality of default cells.
- the base station determines whether to form the spare cell according to the number of user terminals located in the boundary area.
- the first radio frame includes a first MBSFN subframe and a first non-MBSFN subframe
- the second radio frame overlaps with the first non-MBSFN subframe on a time axis
- the second MBSFN subframe includes a second MBSFN subframe that overlaps with the first MBSFN subframe on the time axis.
- the base station of the present invention is a base station having a plurality of default cells adjacent to each other, and has a spare cell that covers a boundary area of the plurality of default cells, and the plurality of default cells have a predetermined frequency.
- a second radio frame having a configuration different from that of the first radio frame so as to share the predetermined frequency band with the plurality of predetermined cells in a time-sharing manner. It is characterized by using a radio frame.
- the user terminal of the present invention is a user terminal in a mobile communication system having a plurality of predetermined cells adjacent to each other, and when the own terminal is located in a boundary region of the plurality of default cells,
- the control unit controls to perform non-CoMP communication with the spare cell
- the plurality of default cells include a predetermined frequency band and a first frequency band. 1
- the spare cell uses a second radio frame having a configuration different from that of the first radio frame so as to share the predetermined frequency band with the plurality of predetermined cells in a time division manner. It is characterized by using.
- 1 is a configuration diagram of an LTE system. It is a schematic block diagram of the radio
- a mobile communication system having a plurality of predetermined cells adjacent to each other has a spare cell that covers a boundary area of the plurality of predetermined cells.
- the predetermined cells use a predetermined frequency band and a first radio frame.
- the spare cell uses a second radio frame having a configuration different from that of the first radio frame so that the predetermined frequency band is shared in time division with the plurality of predetermined cells.
- the user terminal located in the boundary area of a plurality of default cells can perform non-CoMP communication with one spare cell covering the boundary area, not CoMP communication with the plurality of default cells. Therefore, the throughput in the cell boundary region can be improved without performing complicated communication control.
- LTE system configured based on the 3GPP standard after release 10 (that is, LTE Advanced) will be described.
- FIG. 1 is a configuration diagram of an LTE system.
- the LTE system 1 includes a UE (User Equipment), an E-UTRAN (Evolved-UMTS Terrestrial Radio Access Network), and an EPC (Evolved Packet Core).
- UE User Equipment
- E-UTRAN Evolved-UMTS Terrestrial Radio Access Network
- EPC Evolved Packet Core
- the UE is a mobile radio communication device and corresponds to a user terminal.
- the UE is a mobile radio communication device, and performs radio communication with a cell (referred to as a “serving cell”) that has established a connection in a connected state corresponding to a connected state.
- the process of changing the UE's serving cell is called handover.
- E-UTRAN consists of multiple eNBs (evolved Node-B).
- the eNB is a fixed radio communication device that performs radio communication with the UE, and corresponds to a base station.
- Each eNB constitutes one or a plurality of cells.
- the eNB has, for example, a radio resource management (RRM) function, a user data routing function, and a measurement control function for mobility control and scheduling.
- RRM radio resource management
- EPC includes MME (Mobility Management Entity) and S-GW (Serving-Gateway).
- EPC corresponds to a core network.
- the MME is a network entity that performs various types of mobility control for the UE, and corresponds to a control station.
- the S-GW is a network entity that performs transfer control of user data, and corresponds to a switching center.
- ENBs are connected to each other via the X2 interface. Also, the eNB is connected to the MME and S-GW via the S1 interface.
- FIG. 2 is a schematic configuration diagram of a radio frame used in the LTE system 1.
- the LTE system 1 employs OFDMA (Orthogonal Frequency Division Multiplexing Access) on the downlink and SC-FDMA (Single Carrier Division Multiple Access) on the uplink.
- OFDMA Orthogonal Frequency Division Multiplexing Access
- SC-FDMA Single Carrier Division Multiple Access
- the radio frame is composed of ten subframes arranged in the time direction, and each subframe is composed of two slots arranged in the time direction.
- the length of each subframe is 1 ms, and the length of each slot is 0.5 ms.
- Each subframe includes a plurality of resource blocks (RB) in the frequency direction and includes a plurality of symbols in the time direction.
- a guard interval called a cyclic prefix (CP) is provided at the head of each symbol.
- the section of the first few symbols of each subframe is a control region mainly used as a physical downlink control channel (PDCCH).
- the remaining section of each subframe is a data area mainly used as a physical downlink shared channel (PDSCH).
- PDSCH physical downlink shared channel
- both ends in the frequency direction in each subframe are control regions mainly used as a physical uplink control channel (PUCCH). Further, the central portion in the frequency direction in each subframe is a data region mainly used as a physical uplink shared channel (PUSCH).
- PUCCH physical uplink control channel
- PUSCH physical uplink shared channel
- ENB transmits a broadcast signal in a specific subframe in a radio frame.
- the notification signal is a synchronization signal, system information, or the like.
- the synchronization signal includes a primary synchronization signal (PSS) and a secondary synchronization signal (SSS).
- the PSS is mapped to the last symbol of the slots of the subframe with the subframe number # 0 and the subframe of # 5, and the SSS is the second symbol from the end of the same slot (that is, immediately before the PSS). To be mapped.
- the UE When the UE has successfully received the PSS and SSS, it can discover and synchronize with the cell. When the UE successfully receives the system information from the cell after the cell search is completed, the UE acquires information necessary for communication in the cell from the system information, and connects to the cell (access and registration). ).
- System information includes a master information block (MIB) and a system information block (SIB).
- the MIB is transmitted using a physical broadcast channel (PBCH) mapped to a subframe whose subframe number is # 0.
- PBCH physical broadcast channel
- the MIB includes information necessary for receiving the SIB.
- the SIB is transmitted using PDSCH.
- the SIB includes information necessary for accessing the cell.
- SIB1 is mapped to subframe # 5, and SIB2 and subsequent are mapped to subframes described in SIB1.
- CoMP In CoMP, antenna groups arranged at the same place are positioned as one “point”, and a plurality of points cooperate to communicate with the UE.
- the point group that performs cooperative communication with the UE is referred to as a CoMP cooperating set.
- JP Joint Processing
- JP Joint Transmission
- a plurality of points in the CoMP cooperating set simultaneously transmit data to the UE.
- the UE is located in the cell boundary region, the combined gain is obtained by receiving data from a plurality of cells (points) with the same time / frequency resource, so that the communication quality is improved and the throughput is also improved.
- JP Joint Reception
- a plurality of points in the CoMP cooperating set receive the same data from the UE.
- the combined gain is obtained by combining the data received by a plurality of cells (points), so that the communication quality is improved and the throughput is also improved.
- FIG. 3 is a diagram for explaining a mode (Intra-Site CoMP) in which CoMP is performed with a plurality of cells belonging to the same eNB as “points”.
- the eNB has three cells C10-1 to C10-3, but may have four or more cells.
- Cells C10-1 to C10-3 are adjacent to each other.
- the cells C10-1 to C10-3 shown in FIG. 3 can be formed by providing the eNB with three antennas having directivity directed in different directions by 120 °.
- the UE is located in the boundary area between the cells C10-1 and C10-2.
- the cells C10-1 and C10-2 belonging to the same eNB cooperate to perform CoMP (Intra-Site CoMP) with the UE, whereby the throughput in the UE can be improved.
- CoMP Intra-Site CoMP
- Intra-Site CoMP needs to perform complicated communication control in the eNB in order to cooperate in the cells C10-1 and C10-2.
- FIG. 4 is a diagram for explaining a mode (Inter-Site CoMP) in which CoMP is performed with cells belonging to different eNBs as “points”.
- the UE is located in a boundary region between the cell C10 of the eNB # 1 and the cell C11 of the eNB # 2.
- the cell C10 and the cell C11 belonging to different eNBs perform CoMP (Inter-Site CoMP) with the UE in cooperation, thereby improving the throughput in the UE.
- Inter-Site CoMP needs to transmit and receive various types of information on the X2 interface in order to cooperate between eNBs.
- FIG. 5 is a block diagram of the eNB according to the present embodiment.
- the eNB includes a plurality of radio communication units 110, a network communication unit 120, a storage unit 130, and a control unit 140 that are provided for each of a plurality of cells.
- Each of the plurality of wireless communication units 110 is provided with an antenna (directional antenna) 101.
- the wireless communication unit 110 performs wireless communication via the corresponding antenna 101. At the time of transmission, the wireless communication unit 110 performs up-conversion and amplification of the baseband signal input from the control unit 140 and transmits the wireless signal. At the time of reception, the wireless communication unit 110 performs amplification and down-conversion of the reception signal input from the antenna 101, and then outputs a baseband signal to the control unit 140.
- the network communication unit 120 communicates with the EPC using the S1 interface. Moreover, the network communication part 120 performs communication (communication between base stations) with an adjacent eNB using an X2 interface.
- the storage unit 130 is configured using a memory or the like, and stores various types of information used for control by the control unit 140 and the like.
- the control unit 140 is configured using a processor or the like, and controls various functions of the eNB.
- FIG. 6 is a block diagram of the UE according to the present embodiment. As shown in FIG. 6, the UE includes a radio communication unit 210, a storage unit 220, and a control unit 230.
- the wireless communication unit 210 is provided with an antenna (directional antenna) 201.
- the wireless communication unit 210 is configured to perform wireless communication via the antenna 201. At the time of transmission, the wireless communication unit 210 performs up-conversion and amplification of the baseband signal input from the control unit 230 and outputs the wireless signal from the antenna 201. At the time of reception, the wireless communication unit 210 performs amplification and down-conversion of the reception signal input from the antenna 201, and then outputs a baseband signal to the control unit 230.
- the storage unit 220 is configured using a memory or the like, and stores various types of information used for control by the control unit 230 and the like.
- the control unit 230 is configured using a processor or the like, and controls various functions of the UE.
- Intra-Site CoMP can improve the throughput in the UE by cooperating with the cells C10-1 and C10-2, but it is complicated communication to cooperate with the cells C10-1 and C10-2. It is necessary to control. Therefore, a general cell of the eNB is positioned as a “default cell”, and a new cell that covers the boundary area of the default cell is defined as a “standby cell”.
- FIG. 7 is a diagram for explaining the spare cell C20.
- the default cell C10 is indicated by a broken line.
- the eNB has a spare cell C20 that covers the boundary area of the default cell C10.
- the eNB forms one default cell C10 for each pair of adjacent default cells C10.
- the shape of each spare cell C20 is the same as the shape of each predetermined cell C10.
- the protection cells C20-1 to C20-3 can be formed by providing the eNB with three antennas having directivity directed in different directions by 60 ° in addition to the antenna for forming the predetermined cell C10.
- the spare cell C20 uses the same frequency band (predetermined frequency band) as the default cell C10.
- the default cell C10 uses a predetermined frequency band and the first radio frame, and the spare cell C20 is configured with the first radio frame so as to share the predetermined frequency band with the default cell C10 in a time division manner. Use a second radio frame having a different value. Thereby, it is possible to prevent frequency interference from occurring between the default cell C10 and the spare cell C20.
- FIG. 8 is a diagram for explaining the first radio frame and the second radio frame.
- hatched subframes are subframes that can be set as MBSFN (Multicast / Broadcast Single Frequency Network) subframes for MBMS (Multimedia Broadcast Multicast Services).
- the subframes without hatching are subframes that cannot be set as MBSFN subframes (hereinafter referred to as “non-MBSFN subframes”).
- the eNB sets the second radio frame (subframe number thereof) by shifting it by a predetermined number of subframes.
- subframe number # 0 in the second radio frame has an offset of three subframes with reference to subframe number # 0 in the first radio frame.
- the first radio frame includes a first MBSFN subframe (subframe number # 1, # 2, # 3, # 6, # 7, # 8) and a first non-MBSFN subframe (subframe number # 0, # 4, # 5, # 9).
- the second radio frame includes a second MBSFN subframe (subframe number # 1, # 2, # 3, # 6, # 7, # 8) and a second non-MBSFN subframe (subframe number # 0, # 4, # 5, # 9).
- some MBSFN subframes (subframe numbers # 1, # 6) in the first radio frame and some MBSFN subframes (subframe numbers # 8, # 3) in the second radio frame. ) Overlaps on the time axis.
- One of the MBSFN subframes that overlaps on the time axis can be set as a normal subframe (non-MBSFN subframe).
- the eNB resets the frame configurations of the first radio frame and the second radio frame so as to adjust the time division ratio based on the traffic situation in each of the default cell C10 and the protection cell C20. Also good. Specifically, among MBSFN subframes that overlap on the time axis, the MBSFN subframe corresponding to the cell with the higher traffic is set as a normal subframe (non-MBSFN subframe). This makes it possible to use more normal subframes (non-MBSFN subframes) in the cell with the higher traffic among the default cell C10 and the spare cell C20, and the communication capacity can be increased.
- the first radio frame includes a subframe (hereinafter referred to as a “first specific subframe”) to which a DL broadcast signal (MIB / SIB / PSS / SSS) is to be transmitted. And a subframe (hereinafter referred to as a “second specific subframe”) to which a DL broadcast signal (MIB / SIB / PSS / SSS) is to be transmitted.
- the first specific subframe is a subframe with subframe numbers # 0 and # 5 in the first radio frame
- the second specific subframe is a subframe in the second radio frame.
- the subframes have frame numbers # 0 and # 5.
- the DL broadcast signal (MIB / SIB / PSS / SSS) is transmitted in the first radio frame and the second radio frame. It is possible to prevent the subframes to be transmitted from overlapping.
- the throughput of the default cell C10 can be reduced by forming the spare cell C20 and setting the first radio frame and the second radio frame as described above.
- the spare cell C20 may be formed only when the number of UEs located in the boundary region of the default cell C10 is large, that is, when the effect of improving the throughput is expected to be high.
- FIG. 9 is an operation flowchart of the eNB and the UE according to this embodiment.
- the eNB detects each UE located in the boundary area of the default cell C10.
- eNB detects UE located in the boundary area
- step S12 the eNB confirms whether or not the number of UEs located in the boundary region of the default cell C10 is equal to or greater than a threshold value.
- step S12; YES the process proceeds to step S13.
- step S12; NO the process proceeds to step S14.
- step S13 if the eNB is not forming the spare cell C20, the eNB forms the spare cell C20.
- the eNB applies the radio frame configuration shown in FIG. 8 to the default cell C10 and the protection cell C20. Also, the eNB transmits broadcast information indicating the frame configuration of the first radio frame after the change in the default cell C10, and transmits broadcast information indicating the frame configuration of the second radio frame in the backup cell C20. Thereby, the UE whose reception level of the protection cell C20 is better than the reception level of the default cell C10 can perform handover to the protection cell C20 based on the broadcast information from the protection cell C20.
- the UE located in the boundary area of the default cell C10 can establish a connection with the protection cell C20.
- the UE that has established a connection with the protection cell C20 performs normal communication with the eNB (protection cell C20) without performing CoMP.
- the UE since it is difficult to establish a connection with the protection cell C20 for the UE (see FIG. 4) located in the boundary region between the default cell C10 of the eNB and the default cell of another eNB, it has been described above. Inter-Site CoMP is performed.
- step S14 if the eNB is forming the spare cell C20, the eNB ends the formation of the spare cell C20.
- the eNB transmits broadcast information indicating the frame configuration of the first radio frame after initialization in the default cell C10. Further, the eNB instructs the UE connected to the protection cell C20 to perform handover to an appropriate default cell C10.
- the above-described Inter-Site CoMP may be performed for the UE (see FIG. 4) located in the boundary region between the default cell C10 of the eNB and the default cell of another eNB. it can.
- the eNB includes the default cell C10 adjacent to each other and the backup cell C20 that covers the boundary area of the default cell C10.
- the predetermined cell C10 uses a predetermined frequency band and the first radio frame.
- the spare cell C20 uses a second radio frame having a configuration different from that of the first radio frame so as to share the predetermined frequency band with the default cell C10 in a time division manner.
- the UE when the UE is located in the boundary area between the default cells C10 and C11 belonging to different eNBs, the UE performs Inter-Site CoMP with the default cells C10 and C11. Thereby, when communication by the spare cell C20 cannot be performed, the throughput in the cell boundary region can be improved by applying Inter-Site CoMP.
- the eNB determines whether to form the spare cell C20 according to the number of UEs located in the boundary area of the default cell C10. Thereby, the spare cell C20 can be formed when the effect of improving the throughput by the spare cell C20 is expected to be high.
- the first radio frame includes a first MBSFN subframe and a first non-MBSFN subframe.
- the second radio frame includes a second MBSFN subframe that overlaps with the first non-MBSFN subframe on the time axis, and a second non-MBSFN subframe that overlaps with the first MBSFN subframe on the time axis. ,including.
- JT and JR as an example of CoMP have been described, but other CoMP may be applied.
- it is a kind of JP on the downlink
- DCS Dynamic Cell Selection
- CS Coordinatd Scheduling
- CB Coordinatd Beamforming
- the present invention is useful in the mobile communication field.
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Abstract
Description
相互に隣接する複数の既定セルを有する移動通信システムは、前記複数の既定セルの境界領域をカバーする予備セルを有する。前記複数の既定セルは、所定の周波数帯及び第1の無線フレームを使用する。前記予備セルは、前記所定の周波数帯を前記複数の既定セルと時分割で共用するように、前記第1の無線フレームとは構成が異なる第2の無線フレームを使用する。
まず、LTEシステムの概要を説明する。図1は、LTEシステムの構成図である。
次に、CoMPの概要を説明する。CoMPは、同一の場所に配置されたアンテナ群を1つの「ポイント」と位置付け、複数のポイントが協調してUEとの通信を行うものである。UEとの協調通信を行うポイント群は、CoMP協働セットと称される。
次に、eNB及びUEの構成を説明する。
次に、図3、図4、図7~図9を用いて、本実施形態に係るLTEシステム1の動作を説明する。
以上説明したように、eNBは、相互に隣接する既定セルC10と、既定セルC10の境界領域をカバーする予備セルC20と、を有する。既定セルC10は、所定の周波数帯及び第1の無線フレームを使用する。予備セルC20は、当該所定の周波数帯を既定セルC10と時分割で共用するように、第1の無線フレームとは構成が異なる第2の無線フレームを使用する。これにより、既定セルC10の境界領域に位置するUEは、既定セルC10とのIntra-Site CoMPではなく、当該境界領域をカバーする1つの予備セルC20との非CoMP通信を行うことができる。したがって、煩雑な通信制御を行うことなく、セル境界領域でのスループットを改善できる。
上記のように、本発明は実施形態によって記載したが、この開示の一部をなす論述及び図面はこの発明を限定するものであると理解すべきではない。この開示から当業者には様々な代替実施形態、実施例及び運用技術が明らかとなる。
Claims (7)
- 相互に隣接する複数の既定セルを有する移動通信システムであって、
前記複数の既定セルの境界領域をカバーする予備セルを有し、
前記複数の既定セルは、所定の周波数帯及び第1の無線フレームを使用し、
前記予備セルは、前記所定の周波数帯を前記複数の既定セルと時分割で共用するように、前記第1の無線フレームとは構成が異なる第2の無線フレームを使用することを特徴とする移動通信システム。 - 前記境界領域にユーザ端末が位置する場合において、前記複数の既定セル及び前記予備セルが同一の基地局に属するときは、当該ユーザ端末は、前記予備セルとの非CoMP通信を行うことを特徴とする請求項1に記載の移動通信システム。
- 前記境界領域にユーザ端末が位置する場合において、前記複数の既定セルが異なる基地局に属するときは、当該ユーザ端末は、前記複数の既定セルとのCoMP通信を行うことを特徴とする請求項1に記載の移動通信システム。
- 前記複数の既定セルが同一の基地局に属する場合において、前記基地局は、前記境界領域に位置するユーザ端末の数に応じて、前記予備セルを形成するか否かを決定することを特徴とする請求項1に記載の移動通信システム。
- 前記第1の無線フレームは、第1のMBSFNサブフレームと、第1の非MBSFNサブフレームと、を含み、
前記第2の無線フレームは、前記第1の非MBSFNサブフレームと時間軸上で重複する第2のMBSFNサブフレームと、前記第1のMBSFNサブフレームと時間軸上で重複する第2の非MBSFNサブフレームと、を含むことを特徴とする請求項1に記載の移動通信システム。 - 相互に隣接する複数の既定セルを有する基地局であって、
前記複数の既定セルの境界領域をカバーする予備セルを有し、
前記複数の既定セルは、所定の周波数帯及び第1の無線フレームを使用し、
前記予備セルは、前記所定の周波数帯を前記複数の既定セルと時分割で共用するように、前記第1の無線フレームとは構成が異なる第2の無線フレームを使用することを特徴とする基地局。 - 相互に隣接する複数の既定セルを有する移動通信システムにおけるユーザ端末であって、
前記複数の既定セルの境界領域に自端末が位置する場合において、前記複数の既定セルと、前記境界領域をカバーする予備セルと、が同一の基地局に属するとき、前記予備セルとの非CoMP通信を行うよう制御する制御部を有し、
前記複数の既定セルは、所定の周波数帯及び第1の無線フレームを使用し、
前記予備セルは、前記所定の周波数帯を前記複数の既定セルと時分割で共用するように、前記第1の無線フレームとは構成が異なる第2の無線フレームを使用することを特徴とするユーザ端末。
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Publication number | Priority date | Publication date | Assignee | Title |
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JP2000308124A (ja) * | 1999-04-26 | 2000-11-02 | Mitsubishi Electric Corp | 制御チャネル配置方法 |
JP2007228571A (ja) * | 2006-01-26 | 2007-09-06 | Mitsubishi Electric Information Technology Centre Europa Bv | 無線電気通信ネットワークの基地局、基地局によって信号を転送するための方法、無線電気通信ネットワークの端末がどのセクタに位置するかを判定するための方法及びデバイス、コンピュータプログラム、ならびに基地局によって転送される信号 |
WO2011016618A1 (en) * | 2009-08-05 | 2011-02-10 | Samsung Electronics Co., Ltd. | Communication system and method for single-point transmission and reception and coordinated multi-point transmission and reception |
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US8145223B2 (en) * | 2009-04-09 | 2012-03-27 | Telefonaktiebolaget L M Ericsson (Publ) | Inter-cell interference mitigation |
US8717914B2 (en) * | 2009-04-29 | 2014-05-06 | Samsung Electronics Co., Ltd. | Method for controlling interference |
JP5307784B2 (ja) * | 2010-10-27 | 2013-10-02 | 株式会社エヌ・ティ・ティ・ドコモ | 基地局装置、移動端末装置及びスケジューリング方法 |
US8675558B2 (en) * | 2011-01-07 | 2014-03-18 | Intel Corporation | CQI definition for transmission mode 9 in LTE-advanced |
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JP2000308124A (ja) * | 1999-04-26 | 2000-11-02 | Mitsubishi Electric Corp | 制御チャネル配置方法 |
JP2007228571A (ja) * | 2006-01-26 | 2007-09-06 | Mitsubishi Electric Information Technology Centre Europa Bv | 無線電気通信ネットワークの基地局、基地局によって信号を転送するための方法、無線電気通信ネットワークの端末がどのセクタに位置するかを判定するための方法及びデバイス、コンピュータプログラム、ならびに基地局によって転送される信号 |
WO2011016618A1 (en) * | 2009-08-05 | 2011-02-10 | Samsung Electronics Co., Ltd. | Communication system and method for single-point transmission and reception and coordinated multi-point transmission and reception |
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JP5863941B2 (ja) | 2016-02-17 |
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