WO2013077059A1 - セル識別子割当方法、基地局、保守サーバ、移動通信システム - Google Patents
セル識別子割当方法、基地局、保守サーバ、移動通信システム Download PDFInfo
- Publication number
- WO2013077059A1 WO2013077059A1 PCT/JP2012/072911 JP2012072911W WO2013077059A1 WO 2013077059 A1 WO2013077059 A1 WO 2013077059A1 JP 2012072911 W JP2012072911 W JP 2012072911W WO 2013077059 A1 WO2013077059 A1 WO 2013077059A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cell
- base station
- target
- adjacent
- received power
- Prior art date
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/26—Network addressing or numbering for mobility support
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
Definitions
- the present invention relates to a technique for assigning a cell identifier to a cell of a base station.
- PCI Physical Cell Identifier
- the LTE PCI is 504 unique physical-layer cell-identity.
- the physical layer cell identifiers are grouped into 168 unique physical layer cell identifier groups, each group including three unique identifiers.
- the physical layer cell identifier is uniquely defined as follows.
- the LTE mobile communication system includes a database in which the PCI and the like of each cell of an adjacent base station adjacent to the base station are registered for each base station.
- This database is provided in a maintenance server, for example.
- a PCI that is not assigned as a PCI of each cell of an adjacent base station adjacent to the target base station is assigned to the target cell.
- the base station transmits the PCI assigned to the cell to the mobile station located in the cell, in a broadcast signal.
- the mobile station determines the transmission timing at which the pilot signal is transmitted from the cell based on the PSS included in the PCI received from the cell.
- the mobile station receives the pilot signal according to the transmission timing determined above, and measures the received power of the received pilot signal.
- the mobile station searches for a cell having the highest received power from the cells whose received power is measured as described above.
- the mobile station acquires setting information for connecting to the cell from the broadcast signal transmitted from the cell searched above.
- the PCI that is not allocated as the PCI of each cell of the adjacent base station adjacent to the target base station is assigned to the target cell. assign.
- PCI is a structure that uses three different physical layer cell identifiers in the physical layer cell identifier group as PSS code sequence numbers.
- the same PSS code sequence number may be assigned to the target cell, although the PCI is different from that of the cell of the adjacent base station.
- the mobile station since the mobile station receives large interference due to PSS from the neighboring cell in the cell search, there is a problem that the cell search characteristic is deteriorated.
- an object of the present invention is to provide a cell identifier assignment method, a base station, a maintenance server, and a mobile communication system that can solve the above-described problems.
- the first cell identifier allocation method of the present invention includes: A cell identifier assignment method for assigning a cell identifier to a target cell of a target base station among a plurality of base stations, A measurement step of measuring received power or propagation loss of a signal received in the target cell from each cell of an adjacent base station adjacent to the target base station; A identifying step of identifying a first cell having the highest received power or the smallest propagation loss from each cell of the adjacent base station; An assigning step of assigning a cell identifier, which is different from the first cell in the code sequence number of the synchronization signal and is not assigned to each cell of the adjacent base station, to the target cell.
- the second cell identifier assigning method of the present invention comprises: A cell identifier assignment method for assigning a cell identifier to a target cell of a target base station among a plurality of base stations, A specifying step of specifying a first cell having the largest interference with the target cell from among cells of adjacent base stations adjacent to the target base station; An assigning step of assigning a cell identifier, which is different from the first cell in the code sequence number of the synchronization signal and is not assigned to each cell of the adjacent base station, to the target cell.
- the base station of the present invention A base station that assigns a cell identifier to a target cell of the own station, A measurement unit for measuring the received power or propagation loss of the signal received in the target cell from each cell of the adjacent base station adjacent to the own station; The first cell having the highest received power or the smallest propagation loss is identified from each cell of the adjacent base station, the code sequence number of the synchronization signal is different from that of the first cell, and the adjacent cell And an assigning unit that assigns a cell identifier not assigned to each cell of the base station to the target cell.
- the maintenance server of the present invention A maintenance server that assigns a cell identifier to a target cell of a target base station among a plurality of base stations, The first cell having the highest received power or the smallest propagation loss of the signal received from the cell in the target cell is identified from among the cells of the adjacent base station adjacent to the target base station, And an allocation unit that allocates a cell identifier that is not allocated to each cell of the adjacent base station to the target cell.
- the mobile communication system of the present invention is A mobile communication system having a plurality of base stations and assigning a cell identifier to a target cell of a target base station of the plurality of base stations, A measurement unit for measuring the received power or propagation loss of the signal received in the target cell from each cell of the adjacent base station adjacent to the own station; The first cell having the highest received power or the smallest propagation loss is identified from each cell of the adjacent base station, the code sequence number of the synchronization signal is different from the first cell, and the adjacent cell And an assigning unit that assigns a cell identifier not assigned to each cell of the base station to the target cell.
- the first cell having the highest received power or the smallest propagation loss is identified from the cells of adjacent base stations adjacent to the target base station, and the first cell is the synchronization signal.
- Cell identifiers having different code sequence numbers and not assigned to each cell of the adjacent base station are assigned to the target cell.
- the target cell since the target cell has high orthogonality between the synchronization signals with the adjacent cell that is estimated to have the largest interference, and interference from the adjacent cell is reduced, the cell search characteristics of the mobile station The effect that deterioration can be avoided is acquired.
- FIG. 2 is a block diagram showing a configuration of a mobile communication system according to first to third embodiments of the present invention.
- 6 is a flowchart for explaining the operation of the maintenance terminal according to the first to third embodiments of the present invention. It is a flowchart explaining operation
- movement of the maintenance server of the 1st Embodiment of this invention. 6 is a flowchart for explaining the operation of the base station according to the first to third embodiments of the present invention. It is a flowchart explaining operation
- the mobile communication system of the present embodiment includes n (n is a natural number of 2 or more) base stations (eNBs) (# 1 to #n) 10-1 10-n (hereinafter referred to as base station 10 when not identifying which base station), maintenance terminal 20, and maintenance server 30.
- base station 10 when not identifying which base station
- maintenance terminal 20 when not identifying which base station
- maintenance server 30 maintenance server
- the base stations 10-1 to 10-n form cells and transmit / receive signals to / from mobile stations (not shown) located in the cells.
- the maintenance terminal 20 assigns PCI to the target cell of the target base station 10
- the maintenance terminal 20 is moved to the target cell by the maintenance person and received in each target cell from the adjacent base station 10 adjacent to the target base station 10.
- the received power or propagation loss of a signal (for example, pilot signal, broadcast signal, etc.) is measured.
- the maintenance server 30 assigns PCI to the target cell of the target base station 10
- the maintenance server 30 assigns PCI to the target cell based on the measurement result of the reception power or propagation loss of the adjacent base station 10 by the maintenance terminal 20.
- the target base station 10 sets the PCI assigned by the maintenance server 30 to the target cell, and transmits the PCI to the mobile station located in the target cell.
- the maintenance server 30 may be connected to the base stations 10-1 to 10-n and the maintenance terminal 20 either by wire or wirelessly, and the connection form is not limited.
- the base station 10-1 includes an antenna 11, a transmission unit 12, and a control unit 13.
- the antenna 11 is provided for each cell formed by the base station 10-1. 1 shows a plurality of antennas 11, the number of antennas 11 may be one. In that case, the base station 10-1 forms one cell (omni cell).
- the transmission unit 12 transmits a signal (for example, a pilot signal, a broadcast signal, etc.) to the mobile station located in each cell of the base station 10-1 via the antenna 11 corresponding to the cell.
- a signal for example, a pilot signal, a broadcast signal, etc.
- the control unit 13 performs control for transmitting a signal from the transmission unit 12. For example, the control unit 13 controls the maintenance server 30 to set the PCI assigned to the cell of the base station 10-1 in the cell, and to transmit the PCI included in the broadcast signal to the cell.
- Other base stations 10-2 to 10-n have the same configuration as the base station 10-1.
- the maintenance terminal 20 includes a base station DB (Data Base) 21, an antenna 22, a mobile station receiving unit 23, and a measuring unit 24.
- base station DB Data Base
- the base station ID, cell number (different from PCI), and PCI of each cell of the adjacent base station 10 adjacent to the base station 10 are registered for each of the base stations 10-1 to 10-n. Database.
- the maintenance terminal 20 allocates PCI to the target cell of the target base station 10, it is moved to the target cell by the maintenance person.
- the maintenance terminal 20 behaves in the same manner as a mobile station located in the target cell, and signals (for example, signals transmitted from each cell of the target base station 10 and the adjacent base station 10 adjacent to the target base station 10) , Pilot signals, broadcast signals, etc.) are received by the mobile station receiver 23.
- signals for example, signals transmitted from each cell of the target base station 10 and the adjacent base station 10 adjacent to the target base station 10) , Pilot signals, broadcast signals, etc.
- the measurement unit 24 measures received power or propagation loss of a signal received from each cell of the adjacent base station 10 adjacent to the target base station 10 among the signals received by the mobile station reception unit 23.
- the measurement unit 24 first extracts the transmission power included in the broadcast signal, then measures the reception power of the received signal, and calculates the difference between the transmission power and the reception power as the propagation loss.
- the maintenance server 30 has a base station DB 31 and an allocation unit 32.
- the base station DB 31 is a database similar to the base station DB 21.
- the allocating unit 32 When allocating PCI to the target cell of the target base station 10, the allocating unit 32 is based on the measurement result of the received power or the propagation loss by the maintenance terminal 20 from each cell of the adjacent base station 10 adjacent to the target base station 10. Thus, the cell having the largest received power or the smallest propagation loss (first cell, estimated as the cell having the largest interference) is identified.
- the allocating unit 32 allocates a PCI that has a PSS code sequence number different from that of the cell specified above and is not allocated to each cell of the adjacent base station 10 to the target cell.
- the maintenance terminal 20 when assigning PCI to the target cell of the target base station 10, the maintenance terminal 20 is moved to the target cell by the maintenance person, and the base station ID and the target cell of the target base station 10 are moved by the maintenance person. Are set in the measurement unit 24 (step A11).
- the measurement unit 24 refers to the base station DB 21 to confirm each cell of the adjacent base station 10 adjacent to the target base station 10, and among the signals received by the mobile station reception unit 23, The received power of the signal received from each cell is measured (step A12).
- the measurement unit 24 maintains the base station ID of the target base station 10, the cell number of the target cell, the cell number of each cell of the adjacent base station 10 and the measurement result of the received power as the received power measurement information. It outputs to the server 30 (step A13).
- the maintenance server 30 sets the base station ID of the target base station 10 and the cell number of the target cell in the allocation unit 32 by the maintenance person. (Step A21).
- the allocating unit 32 when received power measurement information is input from the maintenance terminal 20 (step A22), the allocating unit 32 refers to the base station DB 31 and each cell of the adjacent base station 10 adjacent to the target base station 10 Confirm. Next, allocating unit 32 identifies the cell with the highest received power (first cell, estimated as the cell with the highest interference) from each cell of adjacent base station 10 based on the received power measurement information. (Step A23).
- the allocating unit 32 refers to the base station DB 31 and confirms the PSS code sequence number allocated to the cell identified in step A23 and confirms the PCI allocated to each cell of the adjacent base station 10. To do.
- the assigning unit 32 assigns, to the target cell, a PCI that has a PSS code sequence number different from that of the cell specified in Step A23 and is not assigned to each cell of the adjacent base station 10 (Step A24).
- the assigning unit 32 outputs the PCI assigned to the target cell in Step A24 and the cell number of the target cell to the target base station 10 (Step A25).
- step A24 the registration of the PCI assigned to the target cell in step A24 to the base station DB 31 and the base station DB 21 may be performed at any timing after step A24.
- the control unit 13 sets the PCI to the target cell (step A32).
- the transmitting unit 12 transmits the PCI included in the broadcast signal to the mobile station located in the target cell of the local station via the antenna 11 corresponding to the target cell (step A33).
- the cell having the largest received power or the smallest propagation loss (estimated as the cell having the largest interference) is identified from the cells of the neighboring base station 10 adjacent to the target base station 10. Then, a PCI that has a PSS code sequence number different from that of the identified cell and is not assigned to each cell of the adjacent base station 10 is assigned to the target cell.
- the PCI allocation operation in the first embodiment is performed as an operation when the base stations 10-1 to 10-n have a three-cell configuration in which three cells are formed.
- the embodiment is specific, and the overall configuration of the mobile communication system, the operations of the base stations 10-1 to 10-n, and the operation of the maintenance terminal 20 are the same as in the first embodiment.
- the operation of the maintenance server 30 will be mainly described.
- the maintenance terminal 20 measures received power.
- the maintenance server 30 sets the base station ID of the target base station 10 and the cell number of the target cell in the allocation unit 32 by the maintainer. (Step B1).
- the allocating unit 32 when reception power measurement information is input from the maintenance terminal 20 (step B2), the allocating unit 32 refers to the base station DB 31 and each cell of the adjacent base station 10 adjacent to the target base station 10 Confirm. Next, allocating unit 32 identifies the cell with the highest received power (first cell, estimated as the cell with the highest interference) from the cells of adjacent base station 10 based on the received power measurement information. Further, the adjacent base station 10 (estimated as the nearest adjacent base station 10) forming the specified cell is specified (step B3).
- the allocating unit 32 selects the cell having the smallest received power (second cell, most interfered) from the cells formed by the adjacent base station 10 identified in step B3 based on the received power measurement information. (Estimated as a cell having a small directivity) (step B4).
- the allocating unit 32 refers to the base station DB 31 and confirms the PSS code sequence number allocated to the cell identified in step B4 and confirms the PCI allocated to each cell of the adjacent base station 10. To do.
- the assigning unit 32 assigns, to the target cell, a PCI that has the same PSS code sequence number as the cell specified in step B4 and is not assigned to each cell of the adjacent base station 10 (step B5).
- the assigning unit 32 outputs the PCI assigned to the target cell in Step B5 and the cell number of the target cell to the target base station 10 (Step B6).
- base stations (# 2 to # 5) 10-2 to 10-5 are adjacent to the base station (# 1) 10-1.
- a character string in a regular hexagon representing a cell represents “base station ID (denoted as eNB #)”, “cell number (denoted as Cell #)”, and “PCI” in order from the top (hereinafter referred to as “PCI”). Same in FIG. 8).
- PCI is allocated to cell # 1 of base station (# 1) 10-1.
- Step b1 First, the measurement unit 24 of the maintenance terminal 20 receives signals received from the cells of the base stations (# 2 to # 5) 10-2 to 10-5 in the cell # 1 of the base station (# 1) 10-1. Measure the received power.
- the measurement results are as follows.
- Step b3 Next, the allocation unit 32 of the maintenance server 30 selects the cell # 4 ( ⁇ 110 dBm, PCI # 3 (mod3 (code sequence number)) having the smallest received power among the cells of the base station (# 2) 10-2. Specify 0)).
- Step b4 Thereafter, the allocation unit 32 of the maintenance server 30 sets mod 3 to 0 and base stations (# 2 to # 5) 10-2 to 10-5 for the cell # 1 of the base station (# 1) 10-1. PCI # 0 that is not assigned to each cell is assigned.
- the cell when PCI is allocated to the target cell of the target base station 10, the cell (with the largest received power or the smallest propagation loss among the adjacent base stations 10 adjacent to the target base station 10 ( The adjacent base station 10 (estimated as the nearest neighbor base station 10) forming the cell having the highest interference) is identified, and reception is performed from among the cells formed by the identified adjacent base station 10 A cell having the smallest power or the largest propagation loss (estimated as a cell having directivity with the smallest interference) is identified, and the identified cell has the same PSS code sequence number and each cell of the adjacent base station 10 PCI that is not assigned to is assigned to the target cell.
- the target cell since the target cell has high orthogonality between PSSs with neighboring cells that are estimated to have the largest interference and interference from the neighboring cells is reduced, the cell search characteristics of the mobile station are degraded. Can be obtained.
- the same PSS code sequence number may be assigned between cells formed by the same base station 10. In this case, interference between PSSs becomes large between cells formed by the same base station 10.
- PCI when PCI is allocated to a plurality of cells formed by the same base station 10, PCI is allocated in preference to a cell having a large reception power or a small propagation loss, and a PSS code is assigned between cells.
- the series numbers are not duplicated.
- the PCI allocation operation in the first embodiment is embodied as an operation in the case where the base stations 10-1 to 10-n have a three-cell configuration.
- the configuration is the same as in the first embodiment.
- the operation of the maintenance terminal 20 is the same as that of the first embodiment. However, in the case of the present embodiment, the maintenance terminal 20 is sequentially moved to the three target cells formed by the target base station 10, and the received power or propagation loss measurement information in each target cell is sequentially output to the maintenance server 30. To do.
- the operations of the base stations 10-1 to 10-n are the same as in the first embodiment.
- the base station 10-1 to 10-n is the target base station 10
- the PCI of each of the three target cells formed by the base station is input from the maintenance server 30. Then, each PCI is set in each target cell, and each PCI is transmitted to a mobile station located in each target cell.
- the operation of the maintenance server 30 will be mainly described.
- the maintenance terminal 20 measures received power.
- the maintenance server 30 sets the base station ID of the target base station 10 in the allocation unit 32 by the maintainer. (Step C1).
- the allocating unit 32 refers to the base station DB 31 and confirms each target cell of the target base station 10, and Each cell of the adjacent base station 10 adjacent to the target base station 10 is confirmed, and the target cell to which the measurement information is input is selected from each target cell of the target base station 10 (step C3).
- the allocating unit 32 has the highest received power (first cell, the highest cell) among the cells of the adjacent base station 10 based on the received power measurement information. (Estimated as a cell having a large interference) (step C4).
- Step C4 the allocating unit 32 performs Step C4 for all target cells of the target base station 10 and determines whether or not a cell having the highest received power has been identified (Step C5).
- Step C5 if there is a target cell that has not been subjected to Step C4, the process waits until measurement information of the target cell that has not been performed is newly input in Step C2 (Step C6), and Step C4 is performed for all target cells. If so, the process proceeds to step C7.
- step C7 the assigning unit 32 assigns a higher priority to each target cell of the target base station 10 in descending order of reception power of the cell specified in step C4.
- the assigning unit 32 selects a target cell having the highest priority from the target cells of the target base station 10 (step C8), and forms the cell specified in step C4 for the selected target cell.
- the adjacent base station 10 (estimated as the nearest adjacent base station 10) is specified (step C9).
- the allocating unit 32 uses the measurement information of the received power from among the cells formed by the adjacent base station 10 identified in step C9 and having a different PSS code sequence number from the other target cells. Based on this, the cell having the smallest received power (second cell, estimated as the cell having the directivity with the smallest interference) is identified (step C10). In step C10, in the case of the target cell having the highest priority, no PCI is assigned to other target cells at that time, so the PSS is not considered, and the cell formed by the adjacent base station 10 The cell having the smallest received power is identified from among the cells.
- the allocating unit 32 refers to the base station DB 31 to confirm the PSS code sequence number allocated to the cell identified in step C10 and confirms the PCI allocated to each cell of the adjacent base station 10 To do.
- the assigning unit 32 assigns, to the target cell, a PCI that has the same PSS code sequence number as the cell specified in Step C10 and is not assigned to each cell of the adjacent base station 10 (Step C11).
- the allocating unit 32 performs Step C11 for all target cells of the target base station 10 and determines whether or not PCI has been allocated (Step C12).
- Step C12 if there is a target cell for which Step C11 has not been performed, the target cell having the next highest priority among the target cells that have not been performed is selected (Step C6), and the process returns to Step C9. If it is implemented for the target cell, the process proceeds to step C14.
- step C14 the assigning unit 32 outputs the PCI assigned in step C11 to each target cell of the target base station 10 and the cell number of each target cell to the target base station 10.
- PCI is allocated to each cell # 1 to # 3 of the base station (# 1) 10-1.
- Step c1 First, the measurement unit 24 of the maintenance terminal 20 receives the base stations (# 2 to # 5) 10-2 to 10- in the cells # 1, # 2, and # 3 of the base station (# 1) 10-1. 5, the received power of the signal received from each cell is measured.
- Step c2 Next, the allocating unit 32 of the maintenance server 30 identifies the cell with the highest received power for each of the cells # 1, # 2, and # 3. Here, it is assumed that it is specified as follows.
- Step c3 Next, the allocating unit 32 of the maintenance server 30 assigns a higher priority to the cells # 1, # 2, and # 3 in descending order of the reception power of the cells specified in step c2. Here, it is assumed that high priority is given in the following order.
- Step c4 Thereafter, the assignment unit 32 of the maintenance server 30 assigns PCIs to the cells # 1, # 2, and # 3 in descending order of priority.
- Step c4- (1) First, the allocating unit 32 identifies a cell with the smallest received power among the cells of the base station (# 2) 10-2 forming the cell # 5 identified in step c2 for the cell # 1. .
- the allocating unit 32 identifies a cell with the smallest received power among the cells of the base station (# 2) 10-2 forming the cell # 5 identified in step c2 for the cell # 1. .
- allocating unit 32 assigns mod 3 to 0 for cell # 1 of base station (# 1) 10-1 and to cells of base stations (# 2 to # 5) 10-2 to 10-5. Assign PCI # 0, which is not assigned.
- Step c4- (2) Next, the assigning unit 32 assigns a cell other than 0 as mod3 among the cells of the base station (# 5) 10-5 forming the cell # 13 identified in step c2 for the cell # 3.
- the cell having the smallest received power is identified from among the cells.
- allocating unit 32 assigns mod 3 to 1 for cell # 3 of base station (# 1) 10-1 and to cells of base stations (# 2 to # 5) 10-2 to 10-5.
- PCI # 15 which is not assigned is assigned.
- Step c4- (3) Next, the allocating unit 32 sets the cell # 2 other than 0 and 1 as mod3 among the cells of the base station (# 4) 10-4 forming the cell # 10 identified in step c2 (that is, The cell with the smallest received power is identified from the cells to which 2) is assigned.
- the allocating unit 32 sets the cell # 2 other than 0 and 1 as mod3 among the cells of the base station (# 4) 10-4 forming the cell # 10 identified in step c2 (that is, The cell with the smallest received power is identified from the cells to which 2) is assigned.
- allocating unit 32 assigns mod 3 to cell # 2 of base station (# 1) 10-1 and sets the cells of base stations (# 2 to # 5) 10-2 to 10-5.
- PCI # 16 which is not assigned is assigned.
- PCI when PCI is allocated to a plurality of target cells formed by the target base station 10, PCI is allocated in preference to a cell having a large received power or a small propagation loss, and PSS is allocated between cells. Are not duplicated.
- the mobile communication system of the present embodiment has the functions of the maintenance terminal 20 and the maintenance server 30 as compared with the first to third embodiments. -1 to 10-n, except that the maintenance terminal 20 and the maintenance server 30 are deleted.
- the antenna 15, the mobile station receiving unit 16, and the measuring unit 17 corresponding to the antenna 22, the mobile station receiving unit 23, and the measuring unit 24 provided in the maintenance terminal 20 are added to the base station 10-1.
- a base station DB 14 corresponding to the base station DB 21 provided in the maintenance terminal 20 and the base station DB 31 provided in the maintenance server 30 is added to the base station 10-1.
- an allocation unit 18 corresponding to the allocation unit 32 provided in the maintenance server 30 is added to the inside of the control unit 13.
- Other base stations 10-2 to 10-n have the same configuration as the base station 10-1.
- This embodiment differs from the first to third embodiments only in that the functions of the maintenance terminal 20 and the maintenance server 30 are provided in the base stations 10-1 to 10-n, and the basic operation is different. Since these are the same, description of the operation is omitted.
- the base stations 10-1 to 10-n measure the received power or propagation loss from each cell of the adjacent base station 10 adjacent to the own station, and the PCI to each cell of the own station. Assign. Therefore, the effect that the base stations 10-1 to 10-n can function as SON (Self-Organizing-Network) is obtained.
- SON Self-Organizing-Network
- PSS PSS
- a synchronization signal other than PSS may be used.
- the code sequence number (for example, Gold sequence) of the SSS is different from the neighboring cell estimated to have the largest interference with respect to the target cell, and its neighboring
- the example in which the base stations 10-1 to 10-n have a three-cell configuration has been described.
- the number of cells formed by the base stations 10-1 to 10-n is not limited to this. Not limited to.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Quality & Reliability (AREA)
- Databases & Information Systems (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
複数の基地局のうちの対象基地局の対象セルにセル識別子を割り当てるセル識別子割当方法であって、
前記対象基地局に隣接する隣接基地局の各セルから前記対象セル内で受信した信号の受信電力または伝搬損失を測定する測定ステップと、
前記隣接基地局の各セルの中から、受信電力が最も大きいまたは伝搬損失が最も小さい第1のセルを特定する特定ステップと、
前記第1のセルとは同期信号の符号系列番号が異なり、かつ、前記隣接基地局の各セルに割り当てられていないセル識別子を前記対象セルに割り当てる割当ステップと、を有する。
複数の基地局のうちの対象基地局の対象セルにセル識別子を割り当てるセル識別子割当方法であって、
前記対象基地局に隣接する隣接基地局の各セルの中から、前記対象セルに対する干渉が最も大きい第1のセルを特定する特定ステップと、
前記第1のセルとは同期信号の符号系列番号が異なり、かつ、前記隣接基地局の各セルに割り当てられていないセル識別子を前記対象セルに割り当てる割当ステップと、を有する。
自局の対象セルにセル識別子を割り当てる基地局であって、
自局に隣接する隣接基地局の各セルから前記対象セル内で受信した信号の受信電力または伝搬損失を測定する測定部と、
前記隣接基地局の各セルの中から、受信電力が最も大きいまたは伝搬損失が最も小さい第1のセルを特定し、前記第1のセルとは同期信号の符号系列番号が異なり、かつ、前記隣接基地局の各セルに割り当てられていないセル識別子を前記対象セルに割り当てる割当部と、を有する。
複数の基地局のうちの対象基地局の対象セルにセル識別子を割り当てる保守サーバであって、
前記対象基地局に隣接する隣接基地局の各セルの中から、当該セルから前記対象セル内で受信した信号の受信電力が最も大きいまたは伝搬損失が最も小さい第1のセルを特定し、前記第1のセルとは同期信号の符号系列番号が異なり、かつ、前記隣接基地局の各セルに割り当てられていないセル識別子を前記対象セルに割り当てる割当部を有する。
複数の基地局を有し、該複数の基地局のうちの対象基地局の対象セルにセル識別子を割り当てる移動通信システムであって、
自局に隣接する隣接基地局の各セルから前記対象セル内で受信した信号の受信電力または伝搬損失を測定する測定部と、
前記隣接基地局の各セルの中から、受信電力が最も大きいまたは伝搬損失が最も小さい第1のセルを特定し、前記第1のセルとは同期信号の符号系列番号が異なり、かつ、前記隣接基地局の各セルに割り当てられていないセル識別子を前記対象セルに割り当てる割当部と、を有する。
(1)第1の実施形態
図1に示すように、本実施形態の移動通信システムは、n(nは2以上の自然数)個の基地局(eNB)(#1~#n)10-1~10-n(以下、どの基地局か特定しないときは基地局10と称す)と、保守端末20と、保守サーバ30と、有している。なお、図1においては、本発明の特徴的な構成要素のみを示し、その他の構成要素は省略している。
(2)第2の実施形態
本実施形態は、第1の実施形態におけるPCIの割当動作を、基地局10-1~10-nが3つのセルを形成する3セル構成である場合における動作として具体化したものであり、移動通信システムの全体構成、基地局10-1~10-nの動作、保守端末20の動作については第1の実施形態と同様である。
まず、保守端末20の測定部24は、基地局(#1)10-1のセル#1内で、基地局(#2~#5)10-2~10-5の各セルから受信した信号の受信電力を測定する。ここでは、測定結果が以下であったとする。
基地局(#2)10-2のセル#5:-79dBm
基地局(#2)10-2のセル#6:-80dBm
基地局(#3)10-3のセル#7:-80dBm
基地局(#3)10-3のセル#8:-90dBm
基地局(#3)10-3のセル#9:-100dBm
基地局(#4)10-4のセル#10:-90dBm
基地局(#4)10-4のセル#11:-100dBm
基地局(#4)10-4のセル#12:-100dBm
基地局(#5)10-5のセル#13:-110dBm
基地局(#5)10-5のセル#14:-120dBm
基地局(#5)10-5のセル#15:-120dBm
ステップb2:
次に、保守サーバ30の割当部32は、基地局(#2~#5)10-2~10-5の中から、受信電力が最も大きいセル#5(-79dBm)を形成している基地局(#2)10-2を特定する。
次に、保守サーバ30の割当部32は、基地局(#2)10-2の各セルの中から、受信電力が最も小さいセル#4(-110dBm、PCI#3(mod3(符号系列番号)が0))を特定する。
その後、保守サーバ30の割当部32は、基地局(#1)10-1のセル#1に対し、mod3が0で、かつ、基地局(#2~#5)10-2~10-5の各セルに割り当てられていない、PCI#0を割り当てる。
(3)第3の実施形態
第2の実施形態は、同一の基地局10が形成しているセル間で、同一のPSSの符号系列番号が割り当てられる可能性がある。この場合、同一の基地局10が形成しているセル間で、PSS同士の干渉が大きくなってしまう。
まず、保守端末20の測定部24は、基地局(#1)10-1のセル#1,#2,#3内のそれぞれで、基地局(#2~#5)10-2~10-5の各セルから受信した信号の受信電力を測定する。
次に、保守サーバ30の割当部32は、各セル#1,#2,#3について、受信電力が最も大きいセルを特定する。ここでは、以下のように特定されたとする。
セル#2:基地局(#4)10-4のセル#10(PCI#9),-90dBm
セル#3:基地局(#5)10-5のセル#13(PCI#12),-85dBm
ステップc3:
次に、保守サーバ30の割当部32は、各セル#1,#2,#3について、ステップc2で特定したセルの受信電力が大きい順に高い優先度を付与する。ここでは、以下の順に高い優先度が付与されたとする。
ステップc4:
その後、保守サーバ30の割当部32は、各セル#1,#2,#3について、優先度が高い順にPCIを割り当てる。
まず、割当部32は、セル#1について、ステップc2で特定したセル#5を形成している基地局(#2)10-2の各セルの中から、受信電力が最も小さいセルを特定する。ここでは、以下のように特定されたとする。
そのため、割当部32は、基地局(#1)10-1のセル#1に対し、mod3が0で、かつ、基地局(#2~#5)10-2~10-5の各セルに割り当てられていない、PCI#0を割り当てる。
次に、割当部32は、セル#3について、ステップc2で特定したセル#13を形成している基地局(#5)10-5の各セルのうち、mod3として0以外が割り当てられたセルの中から、受信電力が最も小さいセルを特定する。ここでは、以下のように特定されたとする。
そのため、割当部32は、基地局(#1)10-1のセル#3に対し、mod3が1で、かつ、基地局(#2~#5)10-2~10-5の各セルに割り当てられていない、PCI#15を割り当てる。
次に、割当部32は、セル#2について、ステップc2で特定したセル#10を形成している基地局(#4)10-4の各セルのうち、mod3として0と1以外(すなわち、2)が割り当てられたセルの中から、受信電力が最も小さいセルを特定する。ここでは、以下のように特定されたとする。
そのため、割当部32は、基地局(#1)10-1のセル#2に対し、mod3が2で、かつ、基地局(#2~#5)10-2~10-5の各セルに割り当てられていない、PCI#16を割り当てる。
(4)第4の実施形態
図9に示すように、本実施形態の移動通信システムは、第1~第3の実施形態と比較して、保守端末20および保守サーバ30の機能を基地局10-1~10-nに備えさせ、保守端末20および保守サーバ30を削除した点が異なる。
Claims (9)
- 複数の基地局のうちの対象基地局の対象セルにセル識別子を割り当てるセル識別子割当方法であって、
前記対象基地局に隣接する隣接基地局の各セルから前記対象セル内で受信した信号の受信電力または伝搬損失を測定する測定ステップと、
前記隣接基地局の各セルの中から、受信電力が最も大きいまたは伝搬損失が最も小さい第1のセルを特定する特定ステップと、
前記第1のセルとは同期信号の符号系列番号が異なり、かつ、前記隣接基地局の各セルに割り当てられていないセル識別子を前記対象セルに割り当てる割当ステップと、を有するセル識別子割当方法。 - 前記複数の基地局の各々は複数のセルを形成するものであり、
前記割当ステップでは、
前記第1のセルを形成している隣接基地局の複数のセルの中から、受信電力が最も小さいまたは伝搬損失が最も大きい第2のセルを特定し、
前記第2のセルと同期信号の符号系列番号が同一で、かつ、前記隣接基地局の各セルに割り当てられていないセル識別子を前記対象セルに割り当てる、請求項1に記載のセル識別子割当方法。 - 前記複数の基地局の各々は複数のセルを形成するものであり、
前記特定ステップでは、
前記対象基地局の複数のセルを前記対象セルとする場合、各対象セルについて、前記第1のセルを特定し、
前記割当ステップでは、
前記対象基地局の複数のセルを前記対象セルとする場合、
各対象セルについて、前記第1のセルの受信電力が大きい順または伝搬損失が小さい順に高い優先度を付与し、
各対象セルについて、前記優先度が高い順に、前記第1のセルを形成している隣接基地局の複数のセルのうち他の対象セルとは同期信号の符号系列番号が異なるセルの中から、受信電力が最も小さいまたは伝搬損失が最も大きい第2のセルを特定し、
各対象セルについて、前記優先度が高い順に、前記第2のセルと同期信号の符号系列番号が同一で、かつ、前記隣接基地局の各セルに割り当てられていないセル識別子を割り当てる、請求項1に記載のセル識別子割当方法。 - 前記測定ステップでは、
前記対象基地局とは異なる装置が、前記隣接基地局の各セルから前記対象セル内で信号を受信し、該受信した信号の受信電力または伝搬損失を測定する、請求項1から3のいずれか1項に記載のセル識別子割当方法。 - 前記測定ステップでは、
前記対象基地局が、前記隣接基地局の各セルから前記対象セル内で信号を受信し、該受信した信号の受信電力または伝搬損失を測定する、請求項1から3のいずれか1項に記載のセル識別子割当方法。 - 複数の基地局のうちの対象基地局の対象セルにセル識別子を割り当てるセル識別子割当方法であって、
前記対象基地局に隣接する隣接基地局の各セルの中から、前記対象セルに対する干渉が最も大きい第1のセルを特定する特定ステップと、
前記第1のセルとは同期信号の符号系列番号が異なり、かつ、前記隣接基地局の各セルに割り当てられていないセル識別子を前記対象セルに割り当てる割当ステップと、を有するセル識別子割当方法。 - 自局の対象セルにセル識別子を割り当てる基地局であって、
自局に隣接する隣接基地局の各セルから前記対象セル内で受信した信号の受信電力または伝搬損失を測定する測定部と、
前記隣接基地局の各セルの中から、受信電力が最も大きいまたは伝搬損失が最も小さい第1のセルを特定し、前記第1のセルとは同期信号の符号系列番号が異なり、かつ、前記隣接基地局の各セルに割り当てられていないセル識別子を前記対象セルに割り当てる割当部と、を有する基地局。 - 複数の基地局のうちの対象基地局の対象セルにセル識別子を割り当てる保守サーバであって、
前記対象基地局に隣接する隣接基地局の各セルの中から、当該セルから前記対象セル内で受信した信号の受信電力が最も大きいまたは伝搬損失が最も小さい第1のセルを特定し、前記第1のセルとは同期信号の符号系列番号が異なり、かつ、前記隣接基地局の各セルに割り当てられていないセル識別子を前記対象セルに割り当てる割当部を有する保守サーバ。 - 複数の基地局を有し、該複数の基地局のうちの対象基地局の対象セルにセル識別子を割り当てる移動通信システムであって、
前記対象基地局に隣接する隣接基地局の各セルから前記対象セル内で受信した信号の受信電力または伝搬損失を測定する測定部と、
前記隣接基地局の各セルの中から、受信電力が最も大きいまたは伝搬損失が最も小さい第1のセルを特定し、前記第1のセルとは同期信号の符号系列番号が異なり、かつ、前記隣接基地局の各セルに割り当てられていないセル識別子を前記対象セルに割り当てる割当部と、を有する移動通信システム。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2013545822A JP5783264B2 (ja) | 2011-11-25 | 2012-09-07 | セル識別子割当方法、基地局、保守サーバ、移動通信システム |
KR1020147017408A KR101607793B1 (ko) | 2011-11-25 | 2012-09-07 | 셀 식별자 할당 방법, 기지국, 보수 서버, 및 이동 통신 시스템 |
CN201280057815.2A CN103947236A (zh) | 2011-11-25 | 2012-09-07 | 小区标识符分配方法、基站、维护服务器、以及移动通信系统 |
US14/352,997 US9392612B2 (en) | 2011-11-25 | 2012-09-07 | Cell identifier allocation method, base station, maintenance server, and mobile communication system |
EP12851863.6A EP2785087B1 (en) | 2011-11-25 | 2012-09-07 | Cell identifier allocation method, base station, maintenance server, and mobile communication system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011257614 | 2011-11-25 | ||
JP2011-257614 | 2011-11-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2013077059A1 true WO2013077059A1 (ja) | 2013-05-30 |
Family
ID=48469518
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2012/072911 WO2013077059A1 (ja) | 2011-11-25 | 2012-09-07 | セル識別子割当方法、基地局、保守サーバ、移動通信システム |
Country Status (6)
Country | Link |
---|---|
US (1) | US9392612B2 (ja) |
EP (1) | EP2785087B1 (ja) |
JP (1) | JP5783264B2 (ja) |
KR (1) | KR101607793B1 (ja) |
CN (1) | CN103947236A (ja) |
WO (1) | WO2013077059A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016500490A (ja) * | 2012-12-04 | 2016-01-12 | ノキア ソリューションズ アンド ネットワークス オサケユキチュア | 物理セル識別子割り当てのためのアルゴリズム |
EP3101933A4 (en) * | 2014-01-27 | 2016-12-07 | Shanghai datang mobile communications equipment co ltd | METHOD AND APPARATUS FOR ASSIGNING IDENTIFIERS OF PHYSICAL CELLS |
US10512646B2 (en) | 2014-08-01 | 2019-12-24 | Janssen Pharmaceutica Nv | Substituted 6,7-dihydropyrazolo[1,5-a]pyrazines as negative allosteric modulators of mGluR2 receptors |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015002494A (ja) * | 2013-06-18 | 2015-01-05 | 株式会社日立製作所 | 通信装置、無線通信システム、無線通信方法、および端末 |
US20160353338A1 (en) * | 2014-02-14 | 2016-12-01 | Telefonaktiebolaget Lm Ericsson (Publ) | Wireless Device, Radio Network Node and Methods for Managing Measurement of Reference Signals |
JOP20150177B1 (ar) | 2014-08-01 | 2021-08-17 | Janssen Pharmaceutica Nv | مركبات 6 ، 7 ثاني هيدرو بيرازولو [ 1، 5 الفا ] بيرازين – 4 (5 يد) – اون واستخدامها كمنظمات الوسترية سلبية لمستقبلات ملجور 2 |
CN105636063B (zh) * | 2014-10-29 | 2018-12-07 | 中国移动通信集团江苏有限公司 | LTE中配置Nanocell的方法及Nanocell |
KR102190122B1 (ko) * | 2015-01-15 | 2020-12-11 | 주식회사 케이티 | Pci 할당 방법 및 pci 할당 장치 |
KR102214078B1 (ko) * | 2015-07-10 | 2021-02-09 | 엘지전자 주식회사 | 비면허 대역을 지원하는 무선접속시스템에서 디스커버리 참조 신호를 전송하는 방법 및 장치 |
CN106612502B (zh) * | 2015-10-22 | 2019-11-12 | 普天信息技术有限公司 | 一种物理小区标识pci的获取方法和系统 |
CN114173308A (zh) * | 2017-03-24 | 2022-03-11 | 华为技术有限公司 | 一种系统信息传输方法及装置 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011176471A (ja) * | 2010-02-23 | 2011-09-08 | Kyocera Corp | 通信システム、制御装置及び基地局装置 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0955974A (ja) | 1995-08-11 | 1997-02-25 | Matsushita Electric Ind Co Ltd | 移動通信装置 |
JP4978850B2 (ja) * | 2006-07-13 | 2012-07-18 | 日本電気株式会社 | セルラシステム、そのキャリア割当方法、基地局、及び移動局 |
KR20090085504A (ko) * | 2008-02-04 | 2009-08-07 | 한국전자통신연구원 | 직교 주파수 분할 다중 접속 기반의 셀룰러 시스템에서의 간섭 완화 방법 |
US8391158B2 (en) * | 2008-07-25 | 2013-03-05 | Qualcomm Incorporated | Cell identifier assignment and selection |
WO2010128908A1 (en) * | 2009-05-08 | 2010-11-11 | Telefonaktiebolaget L M Ericsson (Publ) | Allocation of primary and secondary synchronization code sequences to cells in a wireless communication system |
CN101888622B (zh) | 2009-05-14 | 2015-06-10 | 株式会社Ntt都科摩 | 一种分配物理层小区标识的方法及装置 |
CN101965057B (zh) * | 2009-07-23 | 2014-07-09 | 华为技术有限公司 | 一种分配物理小区标识pci的方法、设备和系统 |
EP2326127B1 (en) | 2009-11-18 | 2017-11-15 | Mitsubishi Electric R&D Centre Europe B.V. | Method and a device for controlling signals transferred by a wireless telecommunication device |
JP5282725B2 (ja) | 2009-12-10 | 2013-09-04 | 富士通株式会社 | 無線基地局及びセル識別子の特定方法 |
JP5516164B2 (ja) * | 2010-07-09 | 2014-06-11 | 富士通株式会社 | セル識別子の決定方法、無線基地局及び無線通信システム |
CN102075945B (zh) * | 2010-12-22 | 2013-07-03 | 北京邮电大学 | Lte无线接入网中分布式物理小区标识的分配方法 |
WO2012107986A1 (ja) * | 2011-02-10 | 2012-08-16 | パナソニック株式会社 | 無線通信端末、無線通信装置及び無線通信システム、並びに、測定方法 |
-
2012
- 2012-09-07 JP JP2013545822A patent/JP5783264B2/ja active Active
- 2012-09-07 EP EP12851863.6A patent/EP2785087B1/en active Active
- 2012-09-07 CN CN201280057815.2A patent/CN103947236A/zh active Pending
- 2012-09-07 US US14/352,997 patent/US9392612B2/en active Active
- 2012-09-07 WO PCT/JP2012/072911 patent/WO2013077059A1/ja active Application Filing
- 2012-09-07 KR KR1020147017408A patent/KR101607793B1/ko active IP Right Grant
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011176471A (ja) * | 2010-02-23 | 2011-09-08 | Kyocera Corp | 通信システム、制御装置及び基地局装置 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016500490A (ja) * | 2012-12-04 | 2016-01-12 | ノキア ソリューションズ アンド ネットワークス オサケユキチュア | 物理セル識別子割り当てのためのアルゴリズム |
US9660748B2 (en) | 2012-12-04 | 2017-05-23 | Nokia Solutions And Networks Oy | Algorithm for physical cell identifier allocation |
EP3101933A4 (en) * | 2014-01-27 | 2016-12-07 | Shanghai datang mobile communications equipment co ltd | METHOD AND APPARATUS FOR ASSIGNING IDENTIFIERS OF PHYSICAL CELLS |
US10512646B2 (en) | 2014-08-01 | 2019-12-24 | Janssen Pharmaceutica Nv | Substituted 6,7-dihydropyrazolo[1,5-a]pyrazines as negative allosteric modulators of mGluR2 receptors |
Also Published As
Publication number | Publication date |
---|---|
CN103947236A (zh) | 2014-07-23 |
KR101607793B1 (ko) | 2016-03-30 |
JP5783264B2 (ja) | 2015-09-24 |
US20140248896A1 (en) | 2014-09-04 |
EP2785087A1 (en) | 2014-10-01 |
EP2785087A4 (en) | 2015-09-09 |
JPWO2013077059A1 (ja) | 2015-04-27 |
EP2785087B1 (en) | 2019-09-04 |
US9392612B2 (en) | 2016-07-12 |
KR20140095104A (ko) | 2014-07-31 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5783264B2 (ja) | セル識別子割当方法、基地局、保守サーバ、移動通信システム | |
CN108605302A (zh) | 共享通信介质上的定时同步协调 | |
KR101909968B1 (ko) | 자원 스케줄링 방법 및 장치 | |
CN109845304A (zh) | 用于网络规划和基于波束的通信系统的操作的方法和设备 | |
CN107534945A (zh) | 一种d2d同步方法及用户设备、服务小区 | |
JP2014532342A (ja) | コンテンツを発行する方法およびユーザ機器 | |
RU2012122184A (ru) | Способ и устройство для совместного использования идентификатора соты между узлами и определения идентификатора соты для узла в совместной связи | |
CN112237039B (zh) | 用于交叉链路干扰测量的资源配置 | |
CN116527097A (zh) | 波束管理 | |
EP3445105A1 (en) | Mobile station, base station, wireless communication system, and wireless communication method | |
WO2019192362A1 (zh) | 电子设备、用户设备、方法和计算机可读存储介质 | |
AU2018336384A1 (en) | Electronic apparatus, method and computer-readable storage medium for wireless communication system | |
US20170367032A1 (en) | Method and Apparatus for Reporting and Processing Proximity Service Capability Information | |
EP3043613A1 (en) | User equipment, base station, information notification method, and resource allocation method | |
CN102625439B (zh) | 一种进行同步的方法和设备 | |
JP2019526185A (ja) | チャネル補正方法及びチャネル補正装置並びに通信システム | |
CN112956249B (zh) | 基站、用户装置以及发送方法 | |
CN107888287B (zh) | 一种在可见光通信网络中基于用户体验质量最优的资源分配方法 | |
JP2009111505A (ja) | 無線通信システム、基地局、及び送信方法 | |
KR101846013B1 (ko) | 인지 무선 tdma 기반 1 대 n 통신 시스템 | |
CN106332098B (zh) | 一种分配物理小区标识的方法及装置 | |
EP2996433A1 (en) | Method, apparatus and user equipment for network coverage-free neighbor discovery | |
WO2017215232A1 (zh) | 一种用于室内覆盖网络的自适应频率调节方法及系统 | |
CN104684067A (zh) | 一种簇头确定方法及用户设备 | |
EP3111687B1 (en) | Physical cell id allocation |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 12851863 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2012851863 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 14352997 Country of ref document: US |
|
ENP | Entry into the national phase |
Ref document number: 2013545822 Country of ref document: JP Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 20147017408 Country of ref document: KR Kind code of ref document: A |