WO2014034255A1 - 通信制御装置、端末装置、通信制御方法、プログラム及び通信制御システム - Google Patents
通信制御装置、端末装置、通信制御方法、プログラム及び通信制御システム Download PDFInfo
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- WO2014034255A1 WO2014034255A1 PCT/JP2013/068068 JP2013068068W WO2014034255A1 WO 2014034255 A1 WO2014034255 A1 WO 2014034255A1 JP 2013068068 W JP2013068068 W JP 2013068068W WO 2014034255 A1 WO2014034255 A1 WO 2014034255A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/20—Selecting an access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
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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
- H04W16/32—Hierarchical cell structures
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/04—Large scale networks; Deep hierarchical networks
- H04W84/042—Public Land Mobile systems, e.g. cellular systems
- H04W84/045—Public Land Mobile systems, e.g. cellular systems using private Base Stations, e.g. femto Base Stations, home Node B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/04—Terminal devices adapted for relaying to or from another terminal or user
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/12—Access point controller devices
Definitions
- the present disclosure relates to a communication control device, a terminal device, a communication control method, a program, and a communication control system.
- the recent wireless communication environment is faced with the problem of depletion of frequency resources due to the rapid increase in data traffic. Therefore, as one of the countermeasures against the depletion of frequency resources, attention is focused on heterogeneous networks.
- the heterogeneous network is a network formed by coexistence of various cells having different radio access technologies, cell sizes or frequency bands.
- 5G fifth generation
- a relatively low frequency band is allocated to a macro cell
- a relatively high frequency band is allocated to a small cell
- the macro cell and the small cell are mutually connected. It has been proposed to overlap (see Non-Patent Document 1 below).
- Non-Patent Document 1 discusses the network density of frequency resources.
- the determination unit that determines whether to communicate via the access point, and the mobile station should communicate via the access point
- a selection unit for selecting a device that operates as the access point for the mobile station, and instructing the device selected by the selection unit to operate as the access point
- a communication control device including a signaling unit that instructs the mobile station to communicate via the device.
- a wireless communication unit operable as an access point and a control node that determines whether the mobile station should communicate via the access point when communicating with any one or more cells A communication control unit that exchanges signaling, and the communication control unit operates the wireless communication unit as the access point when instructed to operate as the access point from the control node.
- a terminal device is provided.
- a mobile station when a mobile station communicates with any one of the one or more cells in a control node that controls formation of a wireless network in one or more cells, the communication should be performed via an access point. Selecting a device that acts as the access point for the mobile station when it is determined that the mobile station should communicate via the access point.
- a communication control method including instructing the device to operate as the access point and instructing the mobile station to communicate via the selected device.
- a computer of a control node that controls formation of a wireless network in the one or more cells.
- a determination unit that determines whether to communicate, and a selection unit that selects a device that operates as the access point for the mobile station when it is determined that the mobile station should communicate via the access point
- a signaling unit for instructing the device selected by the selection unit to operate as the access point and instructing the mobile station to communicate via the device. Is done.
- determination to determine whether to communicate via the access point A selection unit that selects, from the one or more terminal devices, a device that operates as an access point for the mobile station when it is determined that the mobile station should communicate via an access point; And a communication control unit including a signaling unit that instructs the terminal device selected by the selection unit to operate as an access point and instructs the mobile station to communicate via the terminal device.
- a communication control system is provided.
- FIG. 6 is a flowchart illustrating an example of a detailed flow of a connection destination determination process illustrated in FIG. 5. It is a flowchart which shows the 1st example of the detailed flow of the access point selection process shown in FIG. 6 is a flowchart showing a second example of a detailed flow of access point selection processing shown in FIG. 5. 6 is a flowchart showing a third example of a detailed flow of the access point selection process shown in FIG. 5. It is a block diagram which shows an example of a structure of the dynamic AP which concerns on one Embodiment. It is a flowchart which shows an example of the flow of the process which can be performed by dynamic AP shown in FIG. It is a sequence diagram which shows an example of the flow of a process in the communication control system which concerns on one Embodiment.
- FIG. 1 is an explanatory diagram for explaining an example of a configuration of a heterogeneous network.
- the heterogeneous network 1 includes a macro cell 11 and small cells 12a to 12d.
- the macro cell 11 and the small cells 12a to 12d partially overlap each other.
- the macro cell 11 is a large-scale cell operated by the base station BS1.
- the radius of the macro cell 11 may be within a range of several hundred meters to several tens of kilometers.
- the base station BS1 can be referred to as an eNB (evolved Node B).
- the base station BS1 is not limited to such an example, and the base station BS1 operates according to other cellular communication methods such as LTE-A (LTE-Advanced) method, WiMAX method, or W-CDMA (Wideband-Code Division Multiple Access) method. Also good.
- the base station BS1 is connected to the core network 13.
- the core network 13 is connected to the Internet 14.
- a small cell is a small cell compared to a macro cell.
- the small cell 12a is operated by the base station BS2a.
- the small cell 12b is operated by the base station BS2b.
- the small cell 12c is operated by the base station BS2c.
- the small cell 12d is operated by the base station BS2d.
- the small cell refers to a concept including various types of relatively small cells such as a femto cell, a nano cell, a pico cell, and a micro cell.
- the classification of small cells as an example is shown in Table 1. Note that the technology according to the present disclosure can also be applied to types of cells not shown in Table 1.
- Example IF indicates an example of a communication interface (or communication medium) that can be used by a small cell base station to communicate with a macro cell base station or another control node.
- a pico cell may communicate with, for example, a control node in the core network via an S1 interface and other base stations via an X2 interface.
- a femto cell may communicate with other base stations using an X2 tunneling protocol.
- the RRH Remote Radio Head
- the hot zone base station can communicate with the control node in the core network via the S1 interface and with other base stations via the X2 interface.
- the relay station may communicate with the macrocell base station via the air interface.
- the “MS coverage” is an index indicating how many mobile stations (Mobile Station; corresponding to UE in LTE system) can be accommodated per cell. Compared with picocells, RRHs, hot zone base stations and relay stations, femtocell MS coverage is slightly lower.
- “Access type” is a classification relating to acceptance of access from a mobile station. In principle, all mobile stations can be connected to an open access type cell. On the other hand, in principle, only a mobile station registered in advance can be connected to a closed access type cell.
- the heterogeneous network 1 illustrated in FIG. 1 which cell an individual mobile station can connect to depends on the point where the mobile station is located.
- the points P1, P4 to P8 are included in the macro cell 11.
- the point P2 is included in the macro cell 11 and the small cell 12a.
- the point P3 is included in the macro cell 11, the small cell 12c, and the small cell 12d.
- the mobile station MSa forms a wireless connection Ca with the base station BS1 of the macro cell 11.
- the mobile station MSb forms a radio connection Cb with the base station BS2a of the small cell 12a.
- the mobile station MSc forms a radio connection Cc with the base station BS2d of the small cell 12d.
- the mobile stations MSd, MSe, MSf, MSg and MSh form radio connections Cd, Ce, Cf, Cg and Ch with the base station BS1 of the macro cell 11, respectively.
- each mobile station has selected an optimal destination cell, but in practice there are several disadvantageous situations that can adversely affect system capacity or quality of service. Has occurred. For example, since the mobile station MSd is located in the vicinity of the cell edge of the macro cell 11, even if it is connected to the macro cell 11, there is a possibility that only poor communication quality can be obtained.
- the base station BS2d of the small cell 12d is located closer to the mobile station MSd than the base station BS1 of the macro cell 11, but since the radius of the small cell 12d is shorter than the radius of the macro cell 11, the mobile station MSd is directly connected to the small cell 12d. I can't connect.
- the transmission signal from the mobile station MSd may cause harmful interference to the signal received in the small cell 12d.
- the mobile station MSe since the mobile station MSe is located behind the obstacle 15, even if it is connected to the macro cell 11, only poor communication quality may be obtained.
- the mobile stations MSf, MSg, and MSh are located in the vicinity of each other. Therefore, it is difficult to spatially separate these mobile stations by beam forming or antenna directivity control.
- transmission signals from the mobile stations MSf, MSg, and MSh may cause harmful interference to signals received in the small cell 12a.
- the technology according to the present disclosure utilizes a terminal device that can operate as an access point (AP), that is, a dynamic AP.
- AP access point
- An example of dynamic AP classification is shown in Table 2. Note that the technology according to the present disclosure can also be applied to types of dynamic APs not shown in Table 2.
- “Category” indicates the type of dynamic AP.
- “IF example” indicates an example of a communication interface that can be used by a dynamic AP to communicate with a base station or other control node. Both the mobile router terminal and the general terminal can communicate with the base station via the air interface.
- the air interface here may be a cellular radio interface provided by a macro cell or a small cell.
- the dynamic AP may communicate with the base station via a non-cellular air interface (and beyond, a wired network) such as a wireless LAN, Bluetooth (registered trademark), or Zigbee.
- the “AP function” indicates how a function for operating as an access point is realized.
- a mobile router terminal is a terminal in which a unique access point function is installed in advance.
- a general terminal is a terminal that can operate as an access point by subsequently downloading a functional module for the access point function.
- Battery indicates the average size of the battery capacity of the terminal.
- the battery capacity of a mobile router terminal is often larger than the battery capacity of a general terminal.
- the “MS coverage” is an index indicating how many mobile stations can be accommodated per AP. Compared with the various base stations described above, generally, the MS coverage of a dynamic AP is low.
- Access type is a classification relating to acceptance of access from a mobile station.
- the access type of the dynamic AP may be an open access type or a closed access type.
- FIG. 3A is an explanatory diagram for describing a first example of utilization of a dynamic AP.
- the mobile station MSc is connected to the small cell 12d and operates as an access point.
- the mobile station MSd connects to the mobile station MSc to form an access link Ld (also referred to as a localized network), and indirectly communicates with the base station BS2d of the small cell 12d.
- Ld also referred to as a localized network
- the mobile station MSd can obtain good communication quality.
- FIG. 3B is an explanatory diagram for describing a second example of utilization of dynamic AP.
- the heterogeneous network 1 shown in FIG. 2 is shown again.
- the mobile station MSa is connected to the macro cell 11 and operates as an access point.
- the mobile station MSe is connected to the mobile station MSa to form an access link Le (also referred to as a localized network), and indirectly communicates with the base station BS1 of the macro cell 11. As a result, the mobile station MSe can obtain good communication quality.
- an access link Le also referred to as a localized network
- FIG. 3C is an explanatory diagram for explaining a third example of utilization of dynamic AP.
- the mobile station MSg is connected to the macro cell 11 and operates as an access point.
- the mobile station MSf connects to the mobile station MSg to form an access link Lf, and indirectly communicates with the base station BS1 of the macro cell 11.
- the mobile station MSh also connects to the mobile station MSg to form an access link Lh, and indirectly communicates with the base station BS1 of the macro cell 11. Since the mobile stations MSf and MSh are located on the opposite sides with respect to the mobile station MSg, it is easy to spatially separate these mobile stations by beam forming or antenna directivity control. Since the distance between the mobile station MSg and the mobile stations MSf and MSh is short, it is possible to prevent the transmission signals from the mobile stations MSf and MSh from causing harmful interference to the signals received in the small cell 12a.
- networking control entity that is a new functional entity that supports the formation of the above-described localized network.
- the networking control entity determines the necessity of communication via the access point in addition to the determination of the cell to which the mobile station should connect.
- the networking control entity also coordinates such communication if it is determined that communication via the access point is required.
- a networking control node a node in which a networking control entity is implemented.
- the networking control entity may be implemented at any communication node. In terms of accessibility from mobile stations, it is beneficial to implement the networking control entity as a function of either a base station, a control node on the core network, or a server on the Internet.
- the networking control entity is configured to control nodes on the core network 13 (for example, mobility management entity (MME), serving gateway (S-GW) or PDN gateway (P-GW), or NCE). It is assumed that it is implemented in a dedicated node).
- MME mobility management entity
- S-GW serving gateway
- P-GW PDN gateway
- FIG. 4 is a block diagram illustrating an example of a configuration of the networking control node 100 according to an embodiment.
- the networking control node 100 includes a communication unit 110, a storage unit 120, and a control unit 130.
- the communication unit 110 is a communication interface for the networking control node 100 to communicate with other devices.
- the communication unit 110 communicates with various base stations connected to the core network 13 or the Internet 14, for example.
- the communication part 110 communicates with a mobile station via these base stations.
- the storage unit 120 stores a program and data for the operation of the networking control node 100 using a storage medium such as a hard disk or a semiconductor memory.
- the data stored by the storage unit 120 may include information related to cells to be described later, information related to mobile stations and dynamic APs, and measurement results of communication quality.
- Control Unit 130 controls the overall operation of the networking control node 100 using a processor such as a CPU (Central Processing Unit) or a DSP (Digital Signal Processor).
- the control unit 130 includes a connection destination determination unit 132, an AP selection unit 134, and a signaling unit 136.
- connection destination determination unit 132 determines a cell to be communicated with the mobile station among one or more cells that can include a macro cell and a small cell when the mobile station performs wireless communication. To do. More specifically, the connection destination determination unit 132 determines a cell (that is, a connection destination cell) to communicate with the mobile station according to a predetermined determination criterion.
- the criterion here may be a criterion related to at least one of communication quality, traffic load, and power consumption efficiency.
- the connection destination determination unit 132 expects the best communication quality (such as latency, bit rate, throughput, received signal strength, SNR (signal-to-noise ratio) or SINR (signal-to-interference and noise ratio)).
- a cell that can be used may be determined as a connection destination cell.
- the SNR can be calculated from the noise floor of the cell and the received signal strength for that cell.
- the SINR can be calculated by adding the interference level from neighboring cells to the SNR calculation.
- the connection destination determination unit 132 may determine, as the connection destination cell, a cell that can be expected to have sufficient communication quality to satisfy the service quality (QoS) requirement for each mobile station.
- QoS service quality
- connection destination determination unit 132 may determine a cell that uses a wide frequency band as the connection destination cell in order to distribute the load. Further, the connection destination determination unit 132 may determine the cell having the best power consumption efficiency as the connection destination cell in order to contribute to energy saving.
- the connection destination determination unit 132 determines the cell as a connection destination cell.
- the connection destination determination unit 132 may determine the cell with the smallest traffic load at that time as the connection destination cell.
- the connection destination determination unit 132 determines the access point as an access point. It is determined that communication should be performed via the network. In this case, the connection destination determination unit 132 instructs the AP selection unit 134 to select an access point that should operate for the mobile station.
- the AP selection unit 134 operates as an access point for the mobile station when the connection destination determination unit 132 determines that the mobile station should communicate via the access point. Select the device to be used. More specifically, the AP selection unit 134 specifies a dynamic AP existing in the vicinity of the mobile station. Then, when one or more neighboring dynamic APs exist, the AP selection unit 134 selects a dynamic AP that operates as an AP for the mobile station from the dynamic APs as candidates.
- the AP selection unit 134 may select an AP for the mobile station based on the position of a nearby dynamic AP.
- the location of the dynamic AP may be measured and reported to the networking control node 100 by each dynamic AP.
- a base station or other device may measure the location of the dynamic AP.
- the method for position measurement may be a GPS (Global Positioning System) based positioning method, or a method based on signal strength, quality, or arrival time difference of a radio signal.
- the AP selection unit 134 may select a dynamic AP having the best communication quality with the base station from among dynamic APs in the vicinity of the mobile station. Thereby, it is possible to achieve improvement in communication quality and prevention of interference in the mobile station as described with reference to FIGS.
- the AP selection unit 134 may select a dynamic AP located closer to the center of the area. Thereby, the spatial separation of the mobile station and the prevention of interference as described with reference to FIG. 3C can be achieved.
- the AP selection unit 134 selects a dynamic AP according to more complicated geographical conditions, such as a dynamic AP located at a higher altitude or a dynamic AP that secures a line of sight from more mobile stations. You may choose.
- the AP selection unit 134 based on at least one parameter among the performance, mobility, remaining battery capacity, and availability of communication links of each dynamic AP, One dynamic AP may be selected. For example, when an AP that relays traffic moves greatly, communication by a mobile station is hindered. Therefore, the AP selection unit 134 may select a dynamic AP with lower mobility. Note that mobility can be determined by monitoring temporal changes in the position of each dynamic AP. Further, the AP selection unit 134 may select a dynamic AP having the highest performance of hardware such as a processor, a memory, or an RF circuit, or communication performance.
- the communication performance here includes the performance for communication between each dynamic AP and the connection destination cell and the networking control node 100, and can be determined based on a guaranteed QoS level or the like.
- the QoS level may be determined for only the air interface utilized by each dynamic AP, or may be determined for end-to-end communication that may include the air interface and a wired network.
- the AP selection unit 134 may select a dynamic AP with the largest remaining battery level (or connected to a fixed power source).
- the AP selection unit 134 may select a dynamic AP having a wired backhaul link.
- the AP selection unit 134 may select an AP for the mobile station based on the quality measured at the mobile station for a radio signal transmitted from a dynamic AP in the vicinity of the mobile station. .
- the AP selection unit 134 may notify the dynamic AP and mobile station via the signaling unit 136 of parameters such as timing, period, frequency band, and device ID for quality measurement.
- the notification to the dynamic AP may be shared with uplink grant (UL Grant) for uplink transmission from the dynamic AP operating as the MS.
- the AP selection unit 134 may save resources required for quality measurement by causing a plurality of mobile stations to simultaneously perform quality measurement.
- the mobile station reports the measurement result including the measurement value and device ID for each dynamic AP to the networking control node 100.
- the AP selection unit 134 selects an optimal dynamic AP based on the reported measurement result.
- the AP selection unit 134 may select, for example, a dynamic AP having the best quality measured by a certain mobile station for the mobile station. Thereby, the improvement of the communication quality in the mobile station as described with reference to FIGS. 3A and 3B can be achieved.
- the AP selection unit 134 may select a dynamic AP having the best quality measured by a plurality of mobile stations (possibly geographically located at the center of the plurality of mobile stations). Thereby, the spatial separation of the mobile station and the prevention of interference as described with reference to FIG. 3C can be achieved.
- the AP selection unit 134 includes at least one of the performance, mobility, battery remaining amount, and communication link availability of each dynamic AP. Any one dynamic AP may be selected based on one parameter.
- the AP selection unit 134 may select a dynamic AP specified by the mobile station based on the measurement result of the communication quality as an AP for the mobile station.
- the measurement of communication quality by the mobile station can be performed in the same manner as in the second method.
- the mobile station specifies the optimum dynamic AP for itself based on the measurement result of the communication quality.
- the mobile station reports the device ID of the identified dynamic AP to the networking control node 100.
- the AP selection unit 134 determines whether to approve the dynamic AP specified in the report from the mobile station.
- the approved dynamic AP is selected as the AP that operates for the mobile station.
- the AP selection unit 134 may not approve the specified dynamic AP. Further, the AP selection unit 134 may not approve the dynamic AP specified by the mobile station even when there is another dynamic AP that is more appropriate in terms of the topology of the entire network. When there is another recommended dynamic AP, the AP selection unit 134 may select the other dynamic AP instead of the specified dynamic AP. In the third method, when there are a plurality of selectable dynamic APs, the AP selection unit 134 selects at least one of the performance, mobility, battery remaining capacity, and communication link availability of each dynamic AP. Any one dynamic AP may be selected based on the parameter.
- the dynamic AP selected by the AP selection unit 134 may refuse to operate as an access point.
- the AP selection unit 134 can newly select an AP that operates for the mobile station from the remaining dynamic APs.
- the signaling unit 136 performs signaling between the networking control node 100 and another device.
- the signaling executed by the signaling unit 136 may be encrypted according to a secure protocol such as IPsec.
- the signaling unit 136 acquires information related to one or more cells in the heterogeneous network 1 in advance.
- the cell information includes, for example, radio access technology, cell ID, base station location and type, cell size, frequency band, upper and lower limits of transmission power, minimum reception sensitivity, allowable interference level, noise figure (noise figure) , IP address, as well as supported secure protocols, etc.
- the signaling unit 136 acquires information related to the mobile station.
- the signaling unit 136 may acquire information related to the mobile station from the mobile station itself, or may acquire information related to the mobile station from a subscriber information database on the core network 13.
- the information on the mobile station may include, for example, a device ID, a position, capability information (whether it can operate as an AP, and the number of MSs accommodated when it can operate, etc.), battery information, and the like.
- the signaling unit 136 recognizes a trigger for networking control.
- the networking control trigger may be, for example, reception of a control request from a mobile station that newly starts wireless communication or a mobile station that is experiencing poor communication quality.
- the trigger may be reception of a control request from a base station that desires to improve throughput or suppress load.
- the trigger may be detection of a change in network topology, movement of a dynamic AP already operating as an access point, detection of operation stop or battery shortage, or arrival of periodic timing.
- connection destination determination processing by the connection destination determination unit 132 and AP selection processing by the AP selection unit 134 may be executed.
- the signaling unit 136 When it is determined in the result of the connection destination determination process that the mobile station can communicate with any cell without passing through the access point, the signaling unit 136 notifies the mobile station of identification information of the determined connection destination cell.
- identification information As an example, in the LTE scheme, cell group numbers and cell numbers of PSS (Primary Synchronization Sequence) and SSS (Secondary Synchronization Sequence) can constitute cell identification information.
- the cell identification information may be composed of other information such as an orthogonal code or a frequency pattern ID.
- the mobile station can establish a wireless connection in synchronization with the cell selected by the networking control node 100.
- the signaling unit 136 may notify the mobile station of other information (for example, radio access technology and frequency band) regarding the connection destination cell.
- the signaling unit 136 instructs the dynamic AP selected by the AP selection unit 134 to operate as an access point.
- the signaling unit 136 notifies the identification information of the connection destination cell to the dynamic AP.
- the dynamic AP establishes a wireless connection with the connection destination cell and starts an operation as an access point for the mobile station.
- the signaling unit 136 instructs the selected dynamic AP on parameters (for example, frequency band, timing, maximum transmission power, radio access technology, spectrum mask, or encryption method) to be used by the dynamic AP to relay traffic. May be. Further, the signaling unit 136 instructs the mobile station to communicate via the dynamic AP.
- the signaling unit 136 notifies the mobile station of the identification information of the dynamic AP that has started the operation as an access point. As a result, the mobile station connects to the connection destination cell via the dynamic AP, and a localized network as described with reference to FIGS. 3A to 3C is formed.
- the signaling part 136 notifies the identification information of a connection destination cell, or the identification information of dynamic AP to a mobile station. It does not have to be.
- FIG. 5 is a flowchart showing an example of the flow of processing that can be executed by the networking control node 100.
- the signaling unit 136 collects information on one or more cells in the heterogeneous network 1 (step S110).
- the signaling unit 136 collects information related to the mobile station (step S115).
- the signaling unit 136 waits for a control trigger (step S120).
- connection destination determination unit 132 executes a connection destination determination process (step S130). An example of a detailed flow of the connection destination determination process will be described in detail later.
- the connection destination determination unit 132 determines whether the mobile station should communicate via the access point (step S150). Here, if it is determined that the mobile station should communicate via the access point, the AP selection unit 134 executes an access point selection process (step S160). Some examples of the detailed flow of the access point selection process will be described later in detail. Then, the signaling unit 136 instructs the dynamic AP selected as a result of the AP selection process to operate as an access point (step S180).
- step S160 and step S180 can be skipped.
- the signaling unit 136 signals the result of the connection destination determination process (and the result of the access point selection process as necessary) to the mobile station (step S190).
- FIG. 6 is a flowchart showing an example of a detailed flow of the connection destination determination process shown in FIG. Referring to FIG. 6, first, the connection destination determination unit 132 evaluates each of one or more cells according to a predetermined determination criterion (step S132). As described above, the determination criterion here may be a criterion related to at least one of communication quality, traffic load, and power consumption efficiency. Subsequent processing branches according to the number of cells that satisfy the criterion. If there is no cell that satisfies the determination criteria, the process proceeds to step S140 (step S134). If there are a plurality of cells that satisfy the determination criteria, the process proceeds to step S138 (step S136). When there is only one cell that satisfies the determination criterion, the cell is determined as the connection destination cell.
- the determination criterion may be a criterion related to at least one of communication quality, traffic load, and power consumption efficiency. Subsequent processing branches according to the number of cells that satisfy the
- connection destination determination unit 132 determines a connection destination cell from a plurality of cells that satisfy the determination criterion in step S132 according to an additional criterion (step S138).
- the additional criterion here may be, for example, a criterion related to the load for each cell described above.
- step S140 the connection destination determination unit 132 determines that the mobile station should communicate via the access point (step S140).
- the mobile station indirectly connects to a cell to which a dynamic AP selected in an access point selection process described later is connected.
- FIG. 7A is a flowchart showing a first example of a detailed flow of the access point selection process shown in FIG.
- the AP selection unit 134 identifies a device that can operate as a dynamic AP using, for example, capability information of the mobile station (step S162).
- the AP selection unit 134 identifies one or more dynamic APs located in the vicinity of the mobile station to be controlled (step S164).
- the AP selection unit 134 determines for the mobile station based on the identified dynamic AP and the position of the mobile station and other parameters (eg, performance, mobility, remaining battery level, communication link availability, etc.).
- a dynamic AP to be operated is selected (step S166).
- FIG. 7B is a flowchart showing a second example of a detailed flow of the access point selection process shown in FIG.
- the AP selection unit 134 identifies a device that can operate as a dynamic AP using, for example, capability information of the mobile station (step S162).
- the AP selection unit 134 instructs the mobile station to sense a radio signal transmitted from the dynamic AP via the signaling unit 136 (step S168).
- the AP selection unit 134 acquires a sensing result reported from the mobile station, that is, a measurement result of communication quality for each dynamic AP (step S170).
- the AP selection unit 134 selects a dynamic AP to be operated for the mobile station based on the acquired sensing result and other parameters (step S172).
- FIG. 7C is a flowchart showing a third example of a detailed flow of the access point selection process shown in FIG.
- the AP selection unit 134 identifies a device that can operate as a dynamic AP using, for example, capability information of the mobile station (step S162).
- the AP selection unit 134 instructs the mobile station to sense a radio signal transmitted from the dynamic AP via the signaling unit 136 (step S168).
- the instruction here may be omitted, and sensing may be performed autonomously by the mobile station.
- the AP selection unit 134 acquires the device ID of the dynamic AP specified by the mobile station based on the sensing result (step S174).
- the AP selection unit 134 approves the dynamic AP specified by the mobile station (or does not approve the dynamic AP and selects another dynamic AP) (step S176).
- Configuration of dynamic AP> This section describes the configuration of a dynamic AP that normally operates as a mobile station and operates as an access point as necessary.
- FIG. 8 is a block diagram illustrating an example of a configuration of the dynamic AP 200 according to an embodiment.
- the dynamic AP 200 includes a wireless communication unit 210, a storage unit 220, an input unit 230, a display unit 240, and a control unit 250.
- the wireless communication unit 210 is a wireless communication interface for the dynamic AP 200 to perform wireless communication.
- the wireless communication unit 210 establishes a wireless connection with any of the base stations and transmits / receives a wireless signal.
- the radio communication unit 210 further establishes an access link with the mobile station and transmits / receives a radio signal on the access link.
- the access link may be operated in a time division duplex (TDD) manner on a time-frequency resource that can be specified by the networking control node 100 or the base station.
- the wireless communication unit 210 may include a duplexer for preventing transmission signals and reception signals from interfering in an RF (Radio Frequency) circuit when relaying traffic.
- RF Radio Frequency
- the wireless communication unit 210 may have a unique mobile router function for operating as an access point in advance. Instead, the wireless communication unit 210 may operate as an access point by executing a function module downloaded from an external server by the communication control unit 254 described later.
- the storage unit 220 stores a program and data for the operation of the dynamic AP 200 using a storage medium such as a hard disk or a semiconductor memory.
- the data stored by the storage unit 220 may include information on mobile stations, information on connection destination cells, and the like.
- the program stored by the storage unit 220 may include a function module for the mobile router function.
- the input unit 230 includes one or more input devices for the user to input information to the dynamic AP 200.
- the input unit 230 may include a touch sensor integrated with the display unit 240, for example.
- the input unit 230 may include other types of input devices such as a keypad, buttons, switches, or wheels.
- the display unit 240 is a display module configured by an LCD (Liquid Crystal Display) or an OLED (Organic light-Emitting Diode). For example, the display unit 240 displays a setting screen for the user to set the operation of the dynamic AP 200.
- LCD Liquid Crystal Display
- OLED Organic light-Emitting Diode
- Control Unit 250 controls the overall operation of the dynamic AP 200 using a processor such as a CPU or a DSP.
- the control unit 250 includes an application unit 252 and a communication control unit 254.
- the application unit 252 executes an application.
- the application executed by the application unit 252 may include a communication application such as a voice call client, an Internet browser, a mailer, or an SNS client.
- the communication control unit 254 controls wireless communication by the dynamic AP 200. For example, when the dynamic AP 200 operates as a mobile station, the communication control unit 254 causes the radio communication unit 210 to transmit an uplink signal and causes the radio communication unit 210 to transmit a downlink signal according to scheduling information received from the base station. To receive. Further, the communication control unit 254 exchanges signaling with the networking control node 100 described above. For example, the communication control unit 254 may transmit a control request to the networking control node 100 when sufficient communication quality is not obtained for the communication application.
- the communication control unit 254 when instructed to operate as an access point from the networking control node 100, the communication control unit 254 causes the wireless communication unit 210 to operate as an access point.
- the communication control unit 254 downloads a mobile router function module from an external server, and executes the downloaded function module to perform wireless communication.
- Unit 210 may be operated as an access point.
- the communication control unit 254 acquires identification information of a connection destination cell from the networking control node 100. Then, the communication control unit 254 causes the wireless communication unit 210 to relay the traffic of the mobile station between the connection destination cell identified by the acquired identification information and the mobile station.
- the communication control unit 254 also acquires other parameters (for example, frequency band, timing, maximum transmission power, radio access technology, spectrum mask, or encryption method) to be used for relaying traffic from the networking control node 100. Can do.
- the communication control unit 254 when the communication control unit 254 is instructed by the networking control node 100 to transmit a radio signal for sensing by a nearby mobile station, the communication control unit 254 transmits the radio signal to the radio communication unit 210 at the instructed timing, period, and frequency band. To send. Thereby, sensing by a nearby mobile station, that is, measurement of communication quality is possible.
- the communication control unit 254 may perform sensing of a radio signal from a nearby dynamic AP according to an instruction from the networking control node 100. Further, the communication control unit 254 may identify an optimum device that should operate as an AP among one or more nearby dynamic APs based on the sensing result. The communication control unit 254 may report the sensing result or the device ID of the identified dynamic AP to the networking control node 100.
- Reports from the mobile station to the networking control node 100 include an air interface, an IP (Internet Protocol) -based backhaul link, an IEEE 802.11s mesh network, an ad hoc network using Bluetooth (registered trademark) or Zigbee, and the like. It may be performed via any kind of communication means.
- IP Internet Protocol
- IEEE 802.11s mesh network an ad hoc network using Bluetooth (registered trademark) or Zigbee, and the like. It may be performed via any kind of communication means.
- FIG. 9 is a flowchart illustrating an example of a process flow that can be executed by the dynamic AP 200 illustrated in FIG. 8.
- the communication control unit 254 transmits information related to the own device that may include a device ID, a position, capability information, battery information, and the like to the networking control node 100 (or a database on the core network 13). (Step S210). Then, the communication control unit 254 operates the dynamic AP 200 as a mobile station (step S220). The operation as a mobile station may be continued while the dynamic AP 200 is operating.
- the uplink signal transmitted from the wireless communication unit 210 can be a target of sensing by nearby mobile stations as necessary.
- the dynamic AP 200 starts operating as an access point. If the dynamic AP 200 is already operating as an access point, the subsequent processing in steps S250 to S270 can be skipped (step S240).
- the communication control unit 254 determines whether the wireless communication unit 210 has a mobile router function (step S250). When the wireless communication unit 210 does not have the mobile router function, the communication control unit 254 downloads the mobile router function module from the external server and executes the downloaded function module (step S260). Next, the communication control unit 254 acquires the identification information of the connection destination cell from the networking control node 100 (step S270). Then, the communication control unit 254 connects to the connection destination cell identified by the acquired identification information, and operates as an access point (step S280).
- the communication control unit 254 determines whether or not it is permitted to operate as an access point via the user interface provided by the input unit 230 and the display unit 240 before step S280. You may check with the user.
- FIG. 10 is a sequence diagram illustrating an example of a process flow in the communication control system according to the present embodiment.
- the communication control system may include one or more mobile stations (MS), one or more dynamic access points (DAP), one or more cell base stations (BS) and a networking control entity (NCE).
- the dynamic access point may be physically the same device as the mobile station.
- the networking control entity first collects information about the cell from each base station (step S10). Further, the networking control entity collects information on the mobile station from the dynamic access point and other mobile stations (steps S15 and S20).
- step S30 when the networking control entity recognizes the control trigger, it executes a connection destination determination process (step S30). Thereafter, when it is determined as a result of the connection destination determination process that the mobile station can directly communicate with the connection destination cell, the sequence surrounded by the box B1 is executed. On the other hand, if it is determined that the mobile station should communicate via the access point, the sequence surrounded by the box B2 is executed.
- the networking control entity When it is determined that the mobile station can directly communicate with the connected cell, the networking control entity notifies the mobile station of the identification information and other information of the connected cell determined to be communicated with the mobile station (step S40). ). Then, the mobile station performs cell search, synchronizes with the connection destination cell using the notified identification information, and connects to the connection destination cell (step S45).
- the networking control entity further executes AP selection processing (step S50).
- the dynamic AP may support the AP selection process by transmitting a radio signal for measuring communication quality by the mobile station (step S55).
- the mobile station measures the communication quality for the radio signal transmitted from each dynamic AP (step S60).
- the measurement result here or the device ID of the dynamic AP specified by the mobile station is reported to the networking control entity.
- the networking control entity instructs the dynamic AP selected as a result of the AP selection process to operate as an access point (step S70). Then, the dynamic AP establishes a wireless connection with the connection destination cell, and starts an operation as an access point for the mobile station (step S75). Further, the networking control entity notifies the mobile station of identification information and other information of the selected dynamic AP (step S80). Then, the mobile station synchronizes with the dynamic AP using the notified identification information, and connects to the dynamic AP (step S85).
- the networking control entity determines whether the mobile station should communicate via the AP.
- the mobile station connects to any cell via the AP selected from one or more dynamic APs.
- the networking control node instructs the selected dynamic AP to operate as an AP. Therefore, under a heterogeneous network environment, for example, a connection relationship between a mobile station and a cell that is more appropriate in terms of system capacity or service quality can be dynamically established. That is, flexible wireless networking according to the situation of the mobile station becomes possible.
- the networking control entity notifies the selected dynamic AP of the identification information of the connection destination cell. Therefore, when there are multiple cells that can be connected to the dynamic AP, the dynamic AP can connect to the optimal cell determined by the networking control entity and operate as an AP for the mobile station.
- a dynamic AP to be operated as an AP for a mobile station can be selected based on the position of one or more dynamic APs. Accordingly, when mobile stations that can operate as APs are concentrated in a limited area, by operating one of the mobile stations as an AP, it is possible to facilitate the spatial separation of the mobile stations, These mobile stations can be prevented from causing harmful inter-cell interference. Further, it is possible to expect the traffic offloading effect by changing the radio access technology of the AP.
- a dynamic AP to be operated as an AP for a mobile station can be selected based on the quality of radio signals from one or more dynamic APs. Therefore, an access link having better communication quality can be provided to a mobile station experiencing poor communication quality because it is located near a cell edge or behind an obstacle.
- a series of control processing by each device described in this specification may be realized using any of software, hardware, and a combination of software and hardware.
- a program constituting the software is stored in advance in a storage medium (or a non-transitory recording medium) provided inside or outside each device.
- Each program is read into a RAM (Random Access Memory) at the time of execution and executed by a processor such as a CPU.
- RAM Random Access Memory
- a selector that selects a device that operates as the access point for the mobile station when it is determined that the mobile station should communicate via the access point;
- a signaling unit that instructs the device selected by the selection unit to operate as the access point and instructs the mobile station to communicate via the device;
- a communication control device comprising: (2) The communication control device according to (1), wherein the device that operates as the access point is a terminal device that can operate as an access point existing in the vicinity of the mobile station.
- the determination unit determines a cell to be communicated with the mobile station among the one or more cells according to a predetermined determination criterion, The signaling unit notifies the device selected by the selection unit of the identification information of the cell determined by the determination unit; The communication control device according to (2).
- the selection unit selects the device that operates as the access point based on quality measured for a radio signal transmitted from one or more terminal devices that can operate as an access point.
- the communication control device according to (3).
- the selection unit selects the device that operates as the access point based on at least one parameter among performance, mobility, remaining battery power, and communication link availability of the one or more terminal devices.
- the communication control device according to (4) or (5).
- the determination unit determines that the mobile station should communicate via the access point when any cell does not satisfy the determination criterion when the mobile station directly communicates with each cell, The communication control device according to (3).
- the communication control device according to (8), wherein the determination criterion relates to at least one of communication quality, traffic load, and power consumption efficiency.
- the communication control apparatus according to any one of (1) to (9), wherein the one or more cells include a macro cell and a small cell.
- the communication control unit acquires identification information of a cell communicating with the mobile station from the control node, and transmits the identification information of the cell identified by the acquired identification information and the mobile station to the wireless communication unit.
- the terminal device according to (11), wherein the mobile station traffic is relayed.
- the communication control apparatus according to (11) or (12), wherein the wireless communication unit has a unique mobile router function.
- the communication control device according to (11) or (12), wherein the wireless communication unit operates as the access point by executing a functional module downloaded from an external server.
- a control node that controls the formation of a radio network in one or more cells, Determining whether a mobile station should communicate via an access point when communicating with any of the one or more cells; Selecting a device to act as the access point for the mobile station if it is determined that the mobile station should communicate via the access point; Instructing the selected device to act as the access point; Instructing the mobile station to communicate via the selected device; Including a communication control method.
- a control node computer that controls the formation of a wireless network in one or more cells; A determination unit that determines whether to communicate via an access point when a mobile station communicates with any of the one or more cells; A selector that selects a device that operates as the access point for the mobile station when it is determined that the mobile station should communicate via the access point; A signaling unit that instructs the device selected by the selection unit to operate as the access point and instructs the mobile station to communicate via the device; Program to function as.
- One or more terminal devices operable as an access point; A determination unit that determines whether to communicate via an access point when a mobile station communicates with one of one or more cells; A selector that selects, from the one or more terminal devices, a device that operates as an access point for the mobile station when it is determined that the mobile station should communicate via an access point; and A signaling unit that instructs the terminal device selected by the selection unit to operate as an access point and instructs the mobile station to communicate via the terminal device; A communication control device comprising: Including communication control system.
- Communication control device networking control node
- Determination Unit 134 Selection Unit
- Selection Unit 136
- Signaling Unit 200
- Terminal Device Dynamic AP
- Wireless communication unit 254
Abstract
Description
1.技術の概要
1-1.ヘテロジーニアスネットワークの例
1-2.課題の説明
2.ネットワーキング制御ノードの構成
2-1.装置の構成例
2-2.処理の流れの例
3.ダイナミックAPの構成
3-1.装置の構成例
3-2.処理の流れの例
4.全体的な処理シーケンス
5.まとめ
まず、図1~図3Cを用いて、本開示に係る技術の概要を説明する。
図1は、ヘテロジーニアスネットワークの構成の一例について説明するための説明図である。図1を参照すると、一例としてのヘテロジーニアスネットワーク1が示されている。ヘテロジーニアスネットワーク1は、マクロセル11及びスモールセル12a~12dを含む。マクロセル11及びスモールセル12a~12dは、互いに部分的にオーバラップしている。
図1に例示したヘテロジーニアスネットワーク1において、個々の移動局がどのセルに接続し得るかは、移動局が位置する地点に依存する。例えば、地点P1、P4~P8は、マクロセル11に含まれる。これに対し、地点P2は、マクロセル11及びスモールセル12aに含まれる。地点P3は、マクロセル11、スモールセル12c及びスモールセル12dに含まれる。これら地点に位置する移動局がそれぞれ最も通信品質の良好なセルに接続する場合、図2に示すような無線接続が形成され得る。
ネットワーキング制御エンティティは、いずれの通信ノードにおいて実装されてもよい。移動局からのアクセス性の観点では、ネットワーキング制御エンティティを、基地局、コアネットワーク上の制御ノード、又はインターネット上のサーバのいずれかの機能として実装することが有益である。本節では、一例として、ネットワーキング制御エンティティが、コアネットワーク13上の制御ノード(例えば、移動性管理エンティティ(MME)、サービングゲートウェイ(S-GW)若しくはPDNゲートウェイ(P-GW)、又はNCEのための専用のノード)において実装されているものとする。
図4は、一実施形態に係るネットワーキング制御ノード100の構成の一例を示すブロック図である。図4を参照すると、ネットワーキング制御ノード100は、通信部110、記憶部120及び制御部130を備える。
通信部110は、ネットワーキング制御ノード100が他の装置と通信するための通信インタフェースである。通信部110は、例えば、コアネットワーク13又はインターネット14に接続される様々な基地局と通信する。また、通信部110は、それら基地局を介して、移動局と通信する。
記憶部120は、ハードディスク又は半導体メモリなどの記憶媒体を用いて、ネットワーキング制御ノード100の動作のためのプログラム及びデータを記憶する。記憶部120により記憶されるデータは、後に説明するセルに関する情報、移動局及びダイナミックAPに関する情報、並びに通信品質の測定結果などを含み得る。
制御部130は、CPU(Central Processing Unit)又はDSP(Digital Signal Processor)などのプロセッサを用いて、ネットワーキング制御ノード100の動作全般を制御する。本実施形態において、制御部130は、接続先判定部132、AP選択部134及びシグナリング部136を含む。
接続先判定部132は、移動局が無線通信を行う際に、マクロセル及びスモールセルを含み得る1つ以上のセルのうち、移動局と通信すべきセルを判定する。より具体的には、接続先判定部132は、所定の判定基準に従って、移動局と通信すべきセル(即ち、接続先セル)を判定する。ここでの判定基準は、通信品質、トラフィックの負荷及び電力消費効率のうち少なくとも1つに関連する基準であってよい。例えば、接続先判定部132は、最も良好な通信品質(レイテンシ、ビットレート、スループット、受信信号強度、SNR(信号対雑音比)又はSINR(信号対干渉及び雑音比)など)を期待することのできるセルを、接続先セルとして判定してもよい。SNRは、セルのノイズフロア及び当該セルについての受信信号強度から計算され得る。SINRは、SNRの計算にさらに隣接セルからの干渉レベルを算入することにより計算され得る。また、接続先判定部132は、移動局ごとのサービス品質(QoS)の要件を充足する程度に十分な通信品質を期待することのできるセルを、接続先セルとして判定してもよい。また、接続先判定部132は、負荷を分散させるために、帯域幅の広い周波数帯を使用するセルを、接続先セルとして判定してもよい。また、接続先判定部132は、エネルギーの節約に貢献するために、最も良好な電力消費効率を有するセルを、接続先セルとして判定してもよい。
AP選択部134は、接続先判定部132により移動局がアクセスポイントを介して通信すべきであると判定された場合に、当該移動局のためにアクセスポイントとして動作する装置を選択する。より具体的には、AP選択部134は、移動局の近傍に存在するダイナミックAPを特定する。そして、AP選択部134は、1つ以上の近傍のダイナミックAPが存在する場合に、候補としてのそれらダイナミックAPから、移動局のためにAPとして動作するダイナミックAPを選択する。
シグナリング部136は、ネットワーキング制御ノード100と他の装置との間のシグナリングを実行する。シグナリング部136により実行されるシグナリングは、IPsecなどのセキュアプロトコルに従って暗号化されてよい。例えば、シグナリング部136は、ヘテロジーニアスネットワーク1内の1つ以上のセルに関する情報を予め取得する。セルに関する情報は、例えば、無線アクセス技術、セルID、基地局の位置及び種類、セルサイズ、周波数帯、送信電力の上限値及び下限値、最小受信感度、許容干渉レベル、雑音指数(ノイズフィギュア)、IPアドレス、並びにサポートされるセキュアプロトコルなどを含み得る。また、シグナリング部136は、移動局に関する情報を取得する。シグナリング部136は、移動局自身から当該移動局に関する情報を取得してもよく、又はコアネットワーク13上の加入者情報データベースから移動局に関する情報を取得してもよい。移動局に関する情報は、例えば、デバイスID、位置、ケイパビリティ情報(APとして動作可能か、及び動作可能な場合のMS収容数など)及びバッテリ情報などを含み得る。
(1)全体的な流れ
図5は、ネットワーキング制御ノード100により実行され得る処理の流れの一例を示すフローチャートである。図5を参照すると、まず、シグナリング部136は、ヘテロジーニアスネットワーク1内の1つ以上のセルに関する情報を収集する(ステップS110)。また、シグナリング部136は、移動局に関する情報を収集する(ステップS115)。そして、シグナリング部136は、制御のトリガを待ち受ける(ステップS120)。
図6は、図5に示した接続先判定処理の詳細な流れの一例を示すフローチャートである。図6を参照すると、まず、接続先判定部132は、1つ以上のセルの各々を、所定の判定基準に従って評価する(ステップS132)。ここでの判定基準は、上述したように、通信品質、トラフィック負荷及び電力消費効率のうち少なくとも1つに関連する基準であってよい。その後の処理は、判定基準を満たすセルの数に応じて分岐する。判定基準を満たすセルが存在しない場合には、処理はステップS140へ進む(ステップS134)。判定基準を満たすセルが複数が存在する場合には、処理はステップS138へ進む(ステップS136)。判定基準を満たすセルが1つのみ存在する場合には、当該セルが接続先セルとして判定される。
図7Aは、図5に示したアクセスポイント選択処理の詳細な流れの第1の例を示すフローチャートである。図7Aを参照すると、まず、AP選択部134は、例えば移動局のケイパビリティ情報を用いて、ダイナミックAPとして動作可能な装置を識別する(ステップS162)。次に、AP選択部134は、制御対象の移動局の近傍に位置する1つ以上のダイナミックAPを特定する(ステップS164)。そして、AP選択部134は、特定したダイナミックAP及び移動局の位置並びにその他のパラメータ(例えば、性能、移動性、電池残量及び通信リンクの利用可能性など)に基づいて、移動局のために動作すべきダイナミックAPを選択する(ステップS166)。
本節では、通常は移動局として動作し、必要に応じてアクセスポイントとして動作するダイナミックAPの構成について説明する。
図8は、一実施形態に係るダイナミックAP200の構成の一例を示すブロック図である。図8を参照すると、ダイナミックAP200は、無線通信部210、記憶部220、入力部230、表示部240及び制御部250を備える。
無線通信部210は、ダイナミックAP200が無線通信を実行するための無線通信インタフェースである。ダイナミックAP200が移動局として動作する場合には、無線通信部210は、いずれかの基地局との間で無線接続を確立し、無線信号を送受信する。ダイナミックAP200がアクセスポイントとして動作する場合には、無線通信部210は、さらに移動局との間でアクセスリンクを確立し、当該アクセスリンク上で無線信号を送受信する。アクセスリンクは、一例として、ネットワーキング制御ノード100又は基地局により指定され得る時間-周波数リソース上で、時分割複信(TDD:Time Division Duplex)方式で運用されてよい。無線通信部210は、トラフィックを中継する際にRF(Radio Frequency)回路内で送信信号と受信信号とが干渉することを防止するためのデュプレクサを有していてもよい。
記憶部220は、ハードディスク又は半導体メモリなどの記憶媒体を用いて、ダイナミックAP200の動作のためのプログラム及びデータを記憶する。記憶部220により記憶されるデータは、移動局に関する情報及び接続先セルに関する情報などを含み得る。記憶部220により記憶されるプログラムは、モバイルルータ機能のための機能モジュールを含み得る。
入力部230は、ユーザがダイナミックAP200へ情報を入力するための1つ以上の入力デバイスを含む。入力部230は、例えば、表示部240と一体化されるタッチセンサを含んでもよい。また、入力部230は、キーパッド、ボタン、スイッチ又はホイールなどのその他の種類の入力デバイスを含んでもよい。
表示部240は、LCD(Liquid Crystal Display)又はOLED(Organic light-Emitting Diode)などにより構成される表示モジュールである。表示部240は、例えば、ダイナミックAP200の動作をユーザが設定するための設定画面を表示する。
制御部250は、CPU又はDSPなどのプロセッサを用いて、ダイナミックAP200の動作全般を制御する。本実施形態において、制御部250は、アプリケーション部252及び通信制御部254を含む。
アプリケーション部252は、アプリケーションを実行する。アプリケーション部252により実行されるアプリケーションは、例えば、音声通話クライアント、インターネットブラウザ、メーラ又はSNSクライアントなどの通信用アプリケーションを含み得る。
通信制御部254は、ダイナミックAP200による無線通信を制御する。例えば、通信制御部254は、ダイナミックAP200が移動局として動作する場合に、基地局から受信されるスケジューリング情報に従って、無線通信部210にアップリンク信号を送信させ、及び無線通信部210にダウンリンク信号を受信させる。また、通信制御部254は、上述したネットワーキング制御ノード100との間で、シグナリングを交換する。例えば、通信制御部254は、通信用アプリケーションにとって十分な通信品質が得られていない場合に、ネットワーキング制御ノード100へ制御リクエストを送信してもよい。
図9は、図8に示したダイナミックAP200により実行され得る処理の流れの一例を示すフローチャートである。
図10は、本実施形態に係る通信制御システムにおける処理の流れの一例を示すシーケンス図である。通信制御システムは、1つ以上の移動局(MS)、1つ以上のダイナミックアクセスポイント(DAP)、1つ以上のセルの基地局(BS)及びネットワーキング制御エンティティ(NCE)を含み得る。ダイナミックアクセスポイントは、物理的には移動局と同一の装置であってもよい。
ここまで、図1~図10を用いて、本開示に係る技術の実施形態を詳細に説明した。上述した実施形態によれば、1つ以上のセル内に位置する移動局が通信する際に、当該移動局がAPを介して通信すべきかを、ネットワーキング制御エンティティが判定する。そして、移動局がAPを介して通信すべきであると判定された場合に、移動局は、1つ以上のダイナミックAPから選択されるAPを介して、いずれかのセルに接続する。ネットワーキング制御ノードは、選択されたダイナミックAPに、APとして動作することを指示する。従って、ヘテロジーニアスネットワーク環境下で、例えばシステムキャパシティ又はサービス品質の観点でより適切な移動局とセルとの間の接続関係を、動的に構築することができる。即ち、移動局の状況に応じた柔軟な無線ネットワーキングが可能となる。
(1)
移動局が1つ以上のセルのいずれかと通信する際に、アクセスポイントを介して通信すべきかを判定する判定部と、
前記移動局が前記アクセスポイントを介して通信すべきであると判定された場合に、前記移動局のために前記アクセスポイントとして動作する装置を選択する選択部と、
前記選択部により選択された前記装置に前記アクセスポイントとして動作することを指示し、当該装置を介して通信することを前記移動局に指示するシグナリング部と、
を備える通信制御装置。
(2)
前記アクセスポイントとして動作する前記装置は、前記移動局の近傍に存在するアクセスポイントとして動作可能な端末装置である、前記(1)に記載の通信制御装置。
(3)
前記判定部は、所定の判定基準に従って、前記1つ以上のセルのうち前記移動局と通信すべきセルを判定し、
前記シグナリング部は、前記判定部により判定された前記セルの識別情報を前記選択部により選択された前記装置に通知する、
前記(2)に記載の通信制御装置。
(4)
前記選択部は、アクセスポイントとして動作可能な1つ以上の端末装置の位置に基づいて、前記アクセスポイントとして動作する前記装置を選択する、前記(2)又は前記(3)に記載の通信制御装置。
(5)
前記選択部は、アクセスポイントとして動作可能な1つ以上の端末装置から送信される無線信号について測定される品質に基づいて、前記アクセスポイントとして動作する前記装置を選択する、前記(2)又は前記(3)に記載の通信制御装置。
(6)
前記選択部は、前記1つ以上の端末装置の性能、移動性、電池残量及び通信リンクの利用可能性のうち少なくとも1つのパラメータにさらに基づいて、前記アクセスポイントとして動作する前記装置を選択する、前記(4)又は前記(5)に記載の通信制御装置。
(7)
前記選択部は、前記移動局により通信品質の測定結果に基づいて特定される端末装置を、前記アクセスポイントとして動作する前記装置として選択する、前記(2)又は前記(3)に記載の通信制御装置。
通信制御装置。
(8)
前記判定部は、前記移動局が各セルと直接的に通信するといずれのセルも前記判定基準を満たさない場合に、前記移動局は前記アクセスポイントを介して通信すべきであると判定する、前記(3)に記載の通信制御装置。
(9)
前記判定基準は、通信品質、トラフィックの負荷及び電力消費効率のうち少なくとも1つに関連する、前記(8)に記載の通信制御装置。
(10)
前記1つ以上のセルは、マクロセル及びスモールセルを含む、前記(1)~(9)のいずれか1項に記載の通信制御装置。
(11)
アクセスポイントとして動作可能な無線通信部と、
移動局が1つ以上のセルのいずれかと通信する際にアクセスポイントを介して通信すべきかを判定する制御ノードとの間で、シグナリングを交換する通信制御部と、
を備え、
前記通信制御部は、前記制御ノードから前記アクセスポイントとして動作することを指示された場合に、前記無線通信部を前記アクセスポイントとして動作させる、
端末装置。
(12)
前記通信制御部は、前記移動局と通信するセルの識別情報を前記制御ノードから取得し、取得した前記識別情報により識別される前記セルと前記移動局との間で、前記無線通信部に前記移動局のトラフィックを中継させる、前記(11)に記載の端末装置。
(13)
前記無線通信部は、固有のモバイルルータ機能を有する、前記(11)又は前記(12)に記載の通信制御装置。
(14)
前記無線通信部は、外部サーバからダウンロードされる機能モジュールを実行することにより、前記アクセスポイントとして動作する、前記(11)又は前記(12)に記載の通信制御装置。
(15)
1つ以上のセル内の無線ネットワークの形成を制御する制御ノードにおいて、
移動局が前記1つ以上のセルのいずれかと通信する際に、アクセスポイントを介して通信すべきかを判定することと、
前記移動局が前記アクセスポイントを介して通信すべきであると判定された場合に、前記移動局のために前記アクセスポイントとして動作する装置を選択することと、
選択された前記装置に前記アクセスポイントとして動作することを指示することと、
選択された前記装置を介して通信することを前記移動局に指示することと、
を含む通信制御方法。
(16)
1つ以上のセル内の無線ネットワークの形成を制御する制御ノードのコンピュータを、
移動局が前記1つ以上のセルのいずれかと通信する際に、アクセスポイントを介して通信すべきかを判定する判定部と、
前記移動局が前記アクセスポイントを介して通信すべきであると判定された場合に、前記移動局のために前記アクセスポイントとして動作する装置を選択する選択部と、
前記選択部により選択された前記装置に前記アクセスポイントとして動作することを指示し、当該装置を介して通信することを前記移動局に指示するシグナリング部と、
として機能させるためのプログラム。
(17)
アクセスポイントとして動作可能な1つ以上の端末装置と、
移動局が1つ以上のセルのいずれかと通信する際に、アクセスポイントを介して通信すべきかを判定する判定部、
前記移動局がアクセスポイントを介して通信すべきであると判定された場合に、前記移動局のためにアクセスポイントとして動作する装置を、前記1つ以上の端末装置から選択する選択部、及び、
前記選択部により選択された前記端末装置にアクセスポイントとして動作することを指示し、当該端末装置を介して通信することを前記移動局に指示するシグナリング部、
を備える通信制御装置と、
を含む通信制御システム。
132 判定部
134 選択部
136 シグナリング部
200 端末装置(ダイナミックAP)
210 無線通信部
254 通信制御部
Claims (17)
- 移動局が1つ以上のセルのいずれかと通信する際に、アクセスポイントを介して通信すべきかを判定する判定部と、
前記移動局が前記アクセスポイントを介して通信すべきであると判定された場合に、前記移動局のために前記アクセスポイントとして動作する装置を選択する選択部と、
前記選択部により選択された前記装置に前記アクセスポイントとして動作することを指示し、当該装置を介して通信することを前記移動局に指示するシグナリング部と、
を備える通信制御装置。 - 前記アクセスポイントとして動作する前記装置は、前記移動局の近傍に存在するアクセスポイントとして動作可能な端末装置である、請求項1に記載の通信制御装置。
- 前記判定部は、所定の判定基準に従って、前記1つ以上のセルのうち前記移動局と通信すべきセルを判定し、
前記シグナリング部は、前記判定部により判定された前記セルの識別情報を前記選択部により選択された前記装置に通知する、
請求項2に記載の通信制御装置。 - 前記選択部は、アクセスポイントとして動作可能な1つ以上の端末装置の位置に基づいて、前記アクセスポイントとして動作する前記装置を選択する、請求項2に記載の通信制御装置。
- 前記選択部は、アクセスポイントとして動作可能な1つ以上の端末装置から送信される無線信号について測定される品質に基づいて、前記アクセスポイントとして動作する前記装置を選択する、請求項2に記載の通信制御装置。
- 前記選択部は、前記1つ以上の端末装置の性能、移動性、電池残量及び通信リンクの利用可能性のうち少なくとも1つのパラメータにさらに基づいて、前記アクセスポイントとして動作する前記装置を選択する、請求項4に記載の通信制御装置。
- 前記選択部は、前記移動局により通信品質の測定結果に基づいて特定される端末装置を、前記アクセスポイントとして動作する前記装置として選択する、請求項2に記載の通信制御装置。
通信制御装置。 - 前記判定部は、前記移動局が各セルと直接的に通信するといずれのセルも前記判定基準を満たさない場合に、前記移動局は前記アクセスポイントを介して通信すべきであると判定する、請求項3に記載の通信制御装置。
- 前記判定基準は、通信品質、トラフィックの負荷及び電力消費効率のうち少なくとも1つに関連する、請求項8に記載の通信制御装置。
- 前記1つ以上のセルは、マクロセル及びスモールセルを含む、請求項1に記載の通信制御装置。
- アクセスポイントとして動作可能な無線通信部と、
移動局が1つ以上のセルのいずれかと通信する際にアクセスポイントを介して通信すべきかを判定する制御ノードとの間で、シグナリングを交換する通信制御部と、
を備え、
前記通信制御部は、前記制御ノードから前記アクセスポイントとして動作することを指示された場合に、前記無線通信部を前記アクセスポイントとして動作させる、
端末装置。 - 前記通信制御部は、前記移動局と通信するセルの識別情報を前記制御ノードから取得し、取得した前記識別情報により識別される前記セルと前記移動局との間で、前記無線通信部に前記移動局のトラフィックを中継させる、請求項11に記載の端末装置。
- 前記無線通信部は、固有のモバイルルータ機能を有する、請求項11に記載の通信制御装置。
- 前記無線通信部は、外部サーバからダウンロードされる機能モジュールを実行することにより、前記アクセスポイントとして動作する、請求項11に記載の通信制御装置。
- 1つ以上のセル内の無線ネットワークの形成を制御する制御ノードにおいて、
移動局が前記1つ以上のセルのいずれかと通信する際に、アクセスポイントを介して通信すべきかを判定することと、
前記移動局が前記アクセスポイントを介して通信すべきであると判定された場合に、前記移動局のために前記アクセスポイントとして動作する装置を選択することと、
選択された前記装置に前記アクセスポイントとして動作することを指示することと、
選択された前記装置を介して通信することを前記移動局に指示することと、
を含む通信制御方法。 - 1つ以上のセル内の無線ネットワークの形成を制御する制御ノードのコンピュータを、
移動局が前記1つ以上のセルのいずれかと通信する際に、アクセスポイントを介して通信すべきかを判定する判定部と、
前記移動局が前記アクセスポイントを介して通信すべきであると判定された場合に、前記移動局のために前記アクセスポイントとして動作する装置を選択する選択部と、
前記選択部により選択された前記装置に前記アクセスポイントとして動作することを指示し、当該装置を介して通信することを前記移動局に指示するシグナリング部と、
として機能させるためのプログラム。 - アクセスポイントとして動作可能な1つ以上の端末装置と、
移動局が1つ以上のセルのいずれかと通信する際に、アクセスポイントを介して通信すべきかを判定する判定部、
前記移動局がアクセスポイントを介して通信すべきであると判定された場合に、前記移動局のためにアクセスポイントとして動作する装置を、前記1つ以上の端末装置から選択する選択部、及び、
前記選択部により選択された前記端末装置にアクセスポイントとして動作することを指示し、当該端末装置を介して通信することを前記移動局に指示するシグナリング部、
を備える通信制御装置と、
を含む通信制御システム。
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EP2892300A1 (en) | 2015-07-08 |
US20180270749A1 (en) | 2018-09-20 |
RU2629557C2 (ru) | 2017-08-30 |
BR112015003706A2 (ja) | 2017-08-22 |
RU2015105983A (ru) | 2016-09-10 |
JPWO2014034255A1 (ja) | 2016-08-08 |
BR112015003706B1 (pt) | 2022-11-16 |
US20150230168A1 (en) | 2015-08-13 |
EP2892300B1 (en) | 2019-02-20 |
CN104584678A (zh) | 2015-04-29 |
US9998985B2 (en) | 2018-06-12 |
TWI549535B (zh) | 2016-09-11 |
EP2892300A8 (en) | 2015-10-28 |
IN2015DN01428A (ja) | 2015-07-03 |
EP3474607A1 (en) | 2019-04-24 |
CN104584678B (zh) | 2018-08-07 |
US10764824B2 (en) | 2020-09-01 |
TW201414332A (zh) | 2014-04-01 |
EP2892300A4 (en) | 2016-05-18 |
JP6179517B2 (ja) | 2017-08-16 |
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