WO2012101738A1 - 通信システム、ホールエリアの検出方法、基地局装置及び移動局装置 - Google Patents
通信システム、ホールエリアの検出方法、基地局装置及び移動局装置 Download PDFInfo
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- WO2012101738A1 WO2012101738A1 PCT/JP2011/051214 JP2011051214W WO2012101738A1 WO 2012101738 A1 WO2012101738 A1 WO 2012101738A1 JP 2011051214 W JP2011051214 W JP 2011051214W WO 2012101738 A1 WO2012101738 A1 WO 2012101738A1
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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
- H04W16/18—Network planning tools
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
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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
- H04W88/08—Access point devices
Definitions
- the embodiments discussed herein relate to the detection of hole areas that occur in the coverage area of a base station device.
- the system may be operated while reducing the transmission power of some base station devices or stopping transmission output. For example, the amount of traffic handled by the base station device and the power consumption of the base station device are measured, and transmission power and transmission output on / off of the base station device are controlled according to the traffic amount.
- Energy Saving is being studied in 3GPP (The 3rd Generation Generation Partnership Project).
- energy saving may be expressed as “ES”.
- the mobile phone When the mobile phone moves into the mobile communication network, the mobile phone stores one or more pieces of signal information related to the signal from the radio signal source stored in the mobile phone located outside the mobile communication network.
- a reception unit that receives the signal
- a calculation unit that calculates a position of the mobile phone when the mobile phone receives a signal corresponding to the signal information, based on the received one or more signal information, and a calculated mobile phone
- a communication area estimation server including an estimation unit that estimates a position that is out of the range of a mobile communication network based on the position of the mobile communication network.
- a mobile communication system in which power consumption is reduced by changing the zone configuration of the radio base station depending on the communication traffic state of the system, and an incommunicable area is prevented by changing the zone configuration.
- This system includes a radio base station group in which one main radio base station whose radio output level can be changed and a plurality of child radio base stations which can be set only for radio reception operation by stopping the radio output level, And a radio control station that controls the radio base stations in the radio base station group and performs call connection control with an exchange.
- the radio control station has means for centrally monitoring communication traffic notified from the radio base station group, and means for centrally monitoring the electric field strength of the main radio base station notified from each child radio base station group in the radio base station group.
- JP 2010-130523 A JP-A-10-145842
- the hole area is a range in which communication of the mobile station apparatus cannot be performed in the coverage area, and is sometimes called a coverage hole.
- An object of the apparatus and method according to the embodiment is to predict the generation of a hole area in advance due to the stop of the transmission output of the base station apparatus.
- a communication system including a plurality of base station apparatuses including at least a first base station apparatus and a second base station apparatus and a mobile station apparatus.
- the mobile station device measures the received power measurement result to a measurement unit that measures received power from each of the plurality of base station devices, and a base station device that covers a cell where the mobile station device is located among the plurality of base station devices.
- the first base station apparatus includes a measurement result receiving unit that receives a measurement result notified when the mobile station apparatus is located in a cell of the first base station apparatus, and the mobile station apparatus is other than the first base station apparatus.
- a hole detector that detects a hole area that may occur when transmission output from the first base station apparatus is stopped based on a measurement result obtained by measuring received power from the base station apparatus.
- a measurement for receiving reception power measurement results from a plurality of base station apparatuses respectively measured by the mobile station apparatus from a mobile station apparatus located in a cell covered by the base station apparatus Based on the result reception unit and the measurement result of the mobile station device measuring the received power from other base station devices other than the base station device, the hole area that may occur when the transmission output from the base station device is stopped is detected A base station device is provided.
- an instruction signal for notifying a measurement result of received power from the base station apparatus is received from a base station apparatus that covers a cell in which the mobile station apparatus is located among a plurality of base station apparatuses.
- An instruction receiving unit, a measuring unit that measures received power from each of a plurality of base station devices, and a measurement result notifying unit that notifies a measurement result to a base station device that covers a cell where the mobile station device is located A mobile station device is provided.
- a method for detecting a hole area generated in a cover area of a communication system including a plurality of base station devices and mobile station devices.
- received power from a plurality of base station devices is measured at each mobile station device, and among the plurality of base station devices, other base stations other than the base station device covering the cell where the mobile station device is located
- a hole area that may occur when transmission output from the base station apparatus covering the cell where the mobile station apparatus is located is stopped is detected.
- the generation of a hole area due to the stop of the transmission output of the base station apparatus is prevented.
- the above-mentioned hole area is likely to occur when a base station apparatus that stops output is dynamically selected without verifying in advance the effect of stopping transmission output.
- a method for predicting the occurrence of a hole area when a radio link failure occurs, a user equipment as a mobile station records radio quality and location information, and later collects this information on the network side It is conceivable to detect the hole area.
- this method since a hole area cannot be detected until a radio link failure occurs, a problem occurs in providing services to the user.
- FIG. 1 is a diagram illustrating a configuration example of a communication system.
- the communication system 1 includes a plurality of base station apparatuses including at least a first base station apparatus 2a and a second base station apparatus 2b.
- the communication system 1 includes user devices 3 a and 3 b that are mobile station devices, and a server device 4.
- the base station apparatuses 2a and 2b may be collectively referred to as “base station apparatus 2”.
- the user devices 3a and 3b may be collectively referred to as “user device 3”.
- a base station apparatus that covers a cell in which the user apparatus 3 is located may be referred to as a “serving station”.
- the first base station device 2a, the second base station device 2b, and the server device 4 are connected by a communication network 5.
- the network connecting the first base station apparatus 2a and the second base station apparatus 2b and the network connecting the base station apparatus 2 and the server apparatus 4 may be different networks or the same network.
- the base station device 2 detects the occurrence of a hole area that may occur when the base station device 2 stops transmission output, and notifies the server device 4 of it.
- the server device 4 determines whether or not to stop the transmission output from the base station device 2 according to the detection result of the hole area.
- the server apparatus 4 instructs the base station apparatus 2 to stop the transmission output.
- the server device 4 may request to stop the transmission output of the base station device 2 in accordance with the ES being studied in 3GPP.
- the base station device 2 may perform hole area detection processing in response to a request from the server device 4 and notify the server device 4 of the detection result. Further, for example, the base station device 2 measures the usage state of radio resources in the base station device 2 or an adjacent base station device, performs hole area detection processing according to the measurement result, and notifies the server device 4 of the detection result. May be.
- FIG. 2 is a diagram illustrating an example of a hardware configuration of the base station apparatus 2.
- the base station apparatus 2 includes a microprocessor 200, a storage unit 201, a network processor 202, a digital signal processor 203, and a bus 204.
- the microprocessor, the network processor, and the digital signal processor may be referred to as “MPU”, “NWP”, and “DSP”, respectively.
- the base station apparatus 2 includes frequency conversion units 205 and 210, amplification units 206 and 209, a duplexer 207, and an antenna 208.
- the MPU 200, the storage unit 201, the NWP 202, and the DSP 203 are connected by a bus 204.
- the storage unit 201 stores various programs and data for controlling the operation of the base station apparatus 2.
- the storage unit 201 may include a memory, a hard disk, a nonvolatile memory, and the like.
- the MPU 200 executes each process for controlling the operation of the base station apparatus 2 by executing a program stored in the storage unit 201. Further, the DSP 203 executes each program mainly related to communication with the user device 3 by executing a program stored in the storage unit 201.
- the storage unit 201 stores a program executed by the MPU 200 and the DSP 203 and data temporarily used by the program.
- the NWP 202 performs signal transmission / reception processing with other base station apparatuses 2 and server apparatuses 4.
- the NWP 202 may perform signal transmission / reception processing between the base station device 2 and a host device that controls the base station device 2 or a host node device that connects the base station device 2 to the core network.
- the frequency conversion unit 205 converts a signal transmitted from the base station apparatus 2 generated by the DSP 203 to the user apparatus 3 into a radio frequency.
- the amplifying unit 206 amplifies the radio frequency signal.
- the amplified signal is transmitted via the duplexer 207 and the antenna 208.
- the radio signal transmitted from the user device 3 is received by the antenna 208.
- the received signal is input to the amplifying unit 209 via the duplexer 207.
- the amplifying unit 209 amplifies the received signal.
- the frequency converter 210 converts the amplified reception signal having a radio frequency into a baseband signal.
- the baseband signal is processed by the DSP 203.
- FIG. 3 is a configuration diagram of a first example of the base station apparatus 2.
- the DSP 203 in FIG. 2 performs information processing using the components shown in FIG. 3 by executing a program stored in the storage unit 201.
- FIG. 3 mainly shows functions related to the following description. For this reason, the base station apparatus 2 may include components other than the illustrated components.
- the base station apparatus 2 includes a wireless communication unit 220, a data communication unit 221, and a network interface 222.
- the base station apparatus 2 includes an event detection unit 223, a measurement processing control unit 224, an instruction transmission unit 225, a time measurement unit 226, a measurement result reception unit 227, a hall detection unit 228, a hall information creation unit 229,
- the degeneration operation control unit 230 and the active command unit 231 are provided.
- the radio communication unit 220 multiplexes digital signals to be transmitted, converts them to radio frequency signals, and transmits them to the user apparatus 3 via the antenna 208.
- the wireless communication unit 220 converts a radio frequency signal received from the user device 3 via the antenna 208 into a digital signal.
- the data communication unit 221 transmits and receives data signals to and from the user device 3 via the wireless communication unit 220.
- the network interface 222 performs signal transmission / reception processing with other base station apparatuses 2 and server apparatuses 4.
- the network interface 222 may perform signal transmission / reception processing between the base station device 2 and a host device that controls the base station device 2 or a host node device that connects the base station device 2 to the core network.
- the event detection unit 223 detects the occurrence of an event requesting the stop of the transmission output of the signal from the base station device 2 to the mobile station device 3.
- an event requesting to stop transmission output may be referred to as an “ES request event”.
- An example of the ES request event is, for example, a transmission output stop request by the server device 4.
- Another example of the ES request event is a decrease in the usage rate of radio resources measured in the base station device 2 or the adjacent base station device 2, for example.
- the usage rate of radio resources may be measured based on, for example, the number of users and the number of traffic.
- the base station apparatus 2 may include a usage state measurement unit that measures the usage rate of radio resources.
- the event detection unit 223 determines the remaining time TO until the scheduled transmission output stop time. The event detection unit 223 notifies the measurement processing control unit 224 of the occurrence of the ES request event and the remaining time TO.
- the measurement processing control unit 224 selects the user device 3 that notifies the measurement result of the received power from the base station device 2. For example, the measurement processing control unit 224 may select the user device 3 in an active state, which will be described later, as the user device that notifies the measurement result. Instead of or in addition to the user device 3 in the active state, the measurement processing control unit 224 may select the user device 3 in the idle state, which will be described later, as a user device that notifies the measurement result.
- the measurement processing control unit 224 determines a notification period N having a length equal to or shorter than TO based on the remaining time TO.
- the measurement processing control unit 224 notifies the instruction transmission unit 225 of designation information for designating items to be included in the measurement result notification by the base station apparatus 2 and a notification period N.
- this designation information may be referred to as “notification item designation information”.
- the notification item designation information may include, for example, designation of a condition for the user apparatus 3 to select which base station apparatus 2 should be notified of the measurement result measured.
- Examples of such conditions may be, for example, “a base station apparatus in which the best received power is measured and a base station apparatus in which the second best received power is measured”.
- An example of the condition may be, for example, “a base station apparatus in which the second best received power is measured”.
- An example of the condition may be, for example, “a base station apparatus in which received power satisfying a predetermined strength condition is measured”.
- the notification item designation information may designate that the location information of the user device at the time of measurement is included in the notification.
- the instruction transmission unit 225 transmits an instruction signal that causes the user apparatus 3 to measure the received power from the base station apparatus 2 and notify the measurement result to the user apparatus 3 selected by the measurement processing control unit 224.
- the instruction signal includes designation of the notification period N and notification item designation information.
- the instruction signal may include a designation regarding the period of notification from the user device 3.
- the time measuring unit 226 determines whether or not the notification period N has elapsed.
- the measurement result receiving unit 227 receives the measurement result transmitted from the user device 3.
- the hole detection unit 228 detects a hole area that may occur when transmission output from the base station apparatus 3 is stopped based on the received measurement result. A determination method in the detection processing by the hole detection unit 228 will be described later.
- the hole detection unit 228 ends the hole area detection process.
- the hole information creation unit 229 generates hole information indicating the detection state of the hole area and related information related to the detected hole area.
- the detection state of the hole area may be, for example, the number of detections of the hole area or the ratio of the number of detections to the total number of measurements. Further, the related information may be, for example, position information of the user device 3 when the measurement result that causes the hole area detection is transmitted.
- the hall information creation unit 229 transmits hall information to the server device 4 via the network interface 222.
- the server device 4 determines whether or not the transmission output of the base station device 2 can be stopped based on the hall information.
- the server device 4 transmits a transmission output stop instruction to the base station device 2 according to the determination result.
- the degenerate operation control unit 230 receives a transmission output stop instruction via the network interface 222. When the transmission output stop instruction is received, the degenerate operation control unit 230 stops the transmission output of the base station apparatus 2.
- the active command unit 231 transitions the user device 3 to the active state when the user device 3 that transmits the instruction signal is in the idle state.
- the active state is a state in which the measurement result can be transmitted to the base station apparatus 2, and may be a state in which uplink channel synchronization is established, for example.
- the idle state is a state before the measurement result can be transmitted to the base station apparatus 2 and may be a state in which uplink channel synchronization is not established.
- the instruction signal may include designation of the operation state of the user device 3 after the measurement result notification.
- FIG. 4 is a diagram illustrating an example of a hardware configuration of the user device 3.
- the user device 3 includes an MPU 300, a storage unit 301, a DSP 302, and a bus 303.
- the user device 3 includes an antenna 304, a duplexer 305, amplification units 306 and 309, and frequency conversion units 307 and 308.
- the MPU 300, the storage unit 301, and the DSP 302 are connected by a bus 303.
- the storage unit 301 stores various programs and data for controlling the operation of the user device 3.
- the storage unit 301 may include a memory, a hard disk, a nonvolatile memory, and the like.
- the MPU 300 executes each process for controlling the operation of the user device 3 by executing a program stored in the storage unit 301. Further, the DSP 302 executes each process mainly related to communication with the base station apparatus 2 by executing a program stored in the storage unit 301.
- the storage unit 301 stores programs executed by the MPU 300 and the DSP 302 and data temporarily used by the programs.
- the radio signal transmitted from the base station apparatus 2 is received by the antenna 304.
- the received signal is input to the amplifying unit 306 via the duplexer 305.
- the amplifying unit 306 amplifies the received signal.
- the frequency conversion unit 307 converts the amplified reception signal having a radio frequency into a baseband signal.
- the baseband signal is processed by the DSP 302.
- the frequency converter 308 converts a signal transmitted from the user apparatus 3 generated by the DSP 302 to the base station apparatus 2 into a radio frequency.
- the amplifying unit 309 amplifies the radio frequency signal.
- the amplified signal is transmitted via the duplexer 305 and the antenna 304.
- FIG. 5 is a configuration diagram of a first example of the user device 3.
- the DSP 302 in FIG. 4 performs information processing using the components shown in FIG. 5 by executing a program stored in the storage unit 301.
- FIG. 5 mainly shows functions related to the following description. For this reason, the user apparatus 3 may include components other than the illustrated components.
- the user device 3 includes a wireless communication unit 320, a data communication unit 321, an instruction reception unit 321, a measurement processing control unit 322, a state change unit 323, a time measurement unit 324, a received power measurement unit 325, a measurement An information generation unit 326 and a measurement result transmission unit 327 are provided.
- the measurement information generation unit 326 and the measurement result transmission unit 327 may be an example of a measurement result notification unit.
- the radio communication unit 320 multiplexes the digital signal to be transmitted, converts it to a radio frequency signal, and transmits it to the base station apparatus 2 via the antenna 304.
- the wireless communication unit 320 converts the radio frequency signal received from the base station apparatus 2 via the antenna 304 into a digital signal.
- the data communication unit 321 transmits and receives data signals to and from the base station device 2 via the wireless communication unit 320.
- the instruction receiving unit 321 receives the instruction signal transmitted from the base station apparatus 2.
- the instruction receiving unit 321 outputs information elements included in the instruction signal to the measurement processing control unit 322.
- the information elements output to the measurement processing control unit 322 include, for example, notification period N designation and notification item designation information.
- the information element may include designation of the operating state of the user device 3 after notification of the measurement result.
- the designation of the operation state may designate either an idle state or an active state, and the information element may include designation regarding a measurement result notification period.
- the measurement processing control unit 322 When the measurement processing control unit 322 receives the information element from the instruction reception unit 321, the measurement processing control unit 322 causes the state change unit 323 to transition the operation state of the user device 3. At this time, the state changing unit 323 changes the operation state of the user apparatus 3 from the active state to an operation state in which the measurement result of the received power is notified from the base station apparatus 2 for detection of the occurrence of the hall area.
- an operation state in which a measurement result of received power is notified from the base station apparatus 2 for detection of occurrence of a hall area is referred to as a “measurement execution state”.
- the measurement processing control unit 322 causes the state change unit 323 to transition the operation state of the user device 3 in accordance with the designation included in the information element.
- the measurement processing control unit 322 outputs the designation of the notification period N included in the information element to the time measurement unit 324. In addition, the measurement processing control unit 322 outputs notification item designation information to the measurement information generation unit 326. The measurement processing control unit 322 may output the designation related to the measurement result notification cycle to the measurement information generation unit 326.
- the state change unit 323 changes the operation state of the user device 3 in accordance with an instruction from the measurement processing control unit 322. Moreover, the state change part 323 changes the operation state of the user apparatus 3 from an idle state to an active state, when an active command is received from the base station apparatus 2.
- the time measuring unit 324 determines whether or not the notification period N has elapsed.
- the received power measuring unit 325 measures the received power of the radio signal transmitted from the base station device 2. Until the notification period N elapses, the measurement information generation unit 326 extracts the information specified in the notification item specification information from the measurement results measured by the reception power measurement unit 325, thereby serving the serving station 2. Generate information to send to. In the following description, information to be transmitted to the serving station 2 regarding the measurement result may be referred to as “measurement information”.
- the measurement result transmission unit 327 transmits the measurement information generated by the measurement information generation unit 326 to the serving station 2 as a measurement result.
- the measurement information generation unit 326 and the measurement result transmission unit 327 may generate and transmit measurement information in accordance with the designation related to the measurement result notification cycle.
- FIG. 6 is a diagram illustrating an example of a hardware configuration of the server device 4.
- the server device 4 includes an MPU 400, a storage unit 401, an NWP 402, and a bus 403.
- the MPU 400, the storage unit 401, and the NWP 402 are connected by a bus 403.
- the storage unit 401 stores various programs and data for controlling the operation of the server device 4.
- the storage unit 401 may include a memory, a hard disk, a nonvolatile memory, and the like.
- the MPU 400 executes each process for controlling the operation of the server device 4 by executing a program stored in the storage unit 401.
- the storage unit 401 stores a program executed by the MPU 400 and data temporarily used by the program.
- the NWP 402 performs signal transmission / reception processing with the base station apparatus 2.
- FIG. 7 is a diagram illustrating an example of the configuration of the server device 4.
- the MPU 400 in FIG. 6 performs information processing using the components illustrated in FIG. 7 by executing a program stored in the storage unit 401.
- FIG. 7 mainly shows functions related to the following description. For this reason, the server apparatus 4 may include components other than the illustrated components.
- the server device 4 includes a network interface 420, an ES operation control unit 421, and a hall information receiving unit 422.
- the network interface 420 performs transmission / reception processing of signals with the base station apparatus 2.
- the ES operation control unit 421 determines whether or not the transmission output from the base station apparatus 2 needs to be stopped. For example, the ES operation control unit 421 collects the traffic amount and power consumption measured by the base station device 2 via the network 5, thereby transmitting from the base station device 2 according to the traffic amount and power consumption. It may be determined whether output needs to be stopped. The ES operation control unit 421 generates a signal requesting to stop the transmission output of the base station apparatus 2 and transmits the signal to the base station apparatus 2 via the network 5.
- the hall information receiving unit 422 receives the hole information transmitted from the hole information creating unit 229 of the base station device 2.
- the ES operation control unit 421 determines whether or not to stop the transmission output from the base station apparatus 2 based on the received hall information. When stopping the transmission output from the base station apparatus 2, the ES operation control unit 421 instructs the base station apparatus 2 to stop the transmission output. Even when the hole information is not received, the ES operation control unit 421 may instruct the base station apparatus 2 to stop the transmission output.
- FIGS. 2, 4, and 6 are merely examples of the hardware configurations of the base station device 2, the user device 3, and the server device 4. Any other hardware configuration may be adopted as long as the processing described in this specification is executed.
- the event detection unit 223 of the base station apparatus 2 detects the occurrence of an ES request event that requests the transmission output from the base station apparatus 2 to be stopped. At this point, the user device 3a is in an idle state and the user device 3b is in an active state.
- the active command unit 231 specifies the idle user device 3 a located in the cell of the base station device 2.
- the active command unit 231 transmits to the user device 3a an active command that causes the user device 3a to transition to the active state.
- the user apparatus 3a transitions to the active state.
- FIG. 9 shows components related to the mobility management of the user apparatus 3 a in the communication system 1.
- the idle user apparatus 3a is located in the cell of the base station apparatus 2a.
- Reference numeral 6 indicates a mobility management apparatus that performs position registration and paging processing of the user apparatus 3a
- reference numeral 7 is a user apparatus database that registers position information and class information of the user apparatus 3a.
- the mobility management device 6 and the user device database 6 may be, for example, MME (Mobility Management Entity) and HSS (Home Subscriber Server) in LTE (Long Term Term Evolution) which is a communication method defined in 3GPP.
- MME Mobility Management Entity
- HSS Home Subscriber Server
- FIG. 10 shows an example of processing for specifying the idle user device 3a.
- the following operations BA to BH may be steps.
- the event detection unit 223 detects the occurrence of an ES request event.
- the active command unit 231 requests the mobility management device 6 to page all user devices 3 that may be located in the cell of the base station device 2a.
- the mobility management device 6 performs paging only through the base station device 2a with the user device 3 located in the TA (tracking area) where the base station device 2a is located as the receiving terminal.
- the active command unit 231 can identify the user device 3a that has been in an idle state after communication connection based on paging.
- the paging signal transmitted from the base station device 2a is an example of an active command.
- the user apparatus 3a that has received the paging starts an attach procedure in operation BD.
- an attach procedure wireless communication between the user apparatus 3a and the base station apparatus 2a is established, and the user apparatus 3a transitions to an active state.
- the user device 3a notifies class information related to the user device 3a.
- the mobility management device 6 requests an update of class information registered in the user device database 7 with respect to the user device 3a.
- the user device database 7 transmits the class information updated in the response signal to the update request to the mobility management device 6.
- the mobility management device 6 transmits this class information to the base station device 2a.
- the active command unit 231 determines whether or not the user device 3a supports the above measurement execution state based on the class information. When the user device 3a supports the measurement execution state, the active command unit 231 maintains the wireless connection state with the user device 3a. In an operation AD described later, the instruction transmission unit 225 transmits an instruction signal to the user device 3a.
- the active command unit 231 disconnects the wireless connection with the user device 3a. As a result, the user device 3a returns to the idle state.
- the instruction transmission unit 225 transmits an instruction signal to the user device 3.
- the user apparatus 3 transitions to the measurement execution state.
- the instruction signal transmitted to the user device 3a may include an operation state designation for returning the operation state of the user device 3a to the idle state after the notification period N has elapsed.
- the instruction signal transmitted to the user device 3b may include a designation for returning the operation state of the user device 3b to the active state after the notification period N has elapsed.
- the user apparatus 3 transmits the measurement results to the base station apparatus 2 serving as the serving station in operations AE1 to AEn.
- the hole detection unit 228 may generate a hole area when the transmission output from the base station apparatus 2 is stopped based on the measurement results. Is detected. The detection process by the hole detection unit 228 will be described later.
- the measurement processing control unit 322 and the state change unit 323 of the user devices 3a and 3b set the user devices 3a and 3b to the idle state and the active state, respectively, according to the designation of the operation state included in the instruction signal.
- the hall information creation unit 229 In operation AG, the hall information creation unit 229 generates hall information.
- the hall information creation unit 229 transmits the hall information to the server device 4.
- the ES operation control unit 421 of the server device 4 determines whether or not the transmission output of the base station device 2 can be stopped based on the received hall information.
- the ES operation control unit 421 transmits a transmission output stop instruction to the base station apparatus 2 according to the determination result.
- the degenerate operation control unit 230 receives a transmission output stop instruction. When receiving the stop instruction, the degenerate operation control unit 230 stops the transmission output of the base station apparatus 2.
- the following operations CA to CF may be steps.
- the serving station is scheduled to be either the base station apparatus in which the best received power is measured or the base station apparatus in which the second best received power is measured. Therefore, received power from base station apparatuses other than the serving station among these base station apparatuses is the best received power that the user apparatus 3 can receive when the serving station stops.
- the received power in the measurement result at a station other than the serving station among the base station apparatus where the best received power is measured or the base station apparatus where the second best received power is measured can satisfy the desired strength condition. For example, it can be estimated that no hole is generated even if the serving station stops.
- the notification item designation information it is designated to notify the measurement result measured for “the base station apparatus in which the best received power is measured and the base station apparatus in which the second best received power is measured”.
- the The user apparatus 3 transmits to the base station apparatus 2 measurement results measured for the base station apparatus for which the best received power is measured and the base station apparatus for which the second best received power is measured.
- the measurement result receiving unit 227 receives the measurement result transmitted from the user device 3.
- the hall detection unit 228 extracts measurement results measured for base stations 2 other than the own station 2, that is, other than the serving station 2, included in the received measurement results.
- a base station apparatus serving as a serving station may be referred to as “base station apparatus 2a” and another base station apparatus may be referred to as “base station apparatus 2b”.
- the hall detection unit 228 determines whether or not there is a measurement result related to the other base station apparatus 2b. If there is a measurement result related to the other base station apparatus 2b (operation CC: Y), the processing proceeds to operation CD. When there is no measurement result regarding the other base station apparatus 2b (operation CC: N), the processing proceeds to operation CF.
- the hall detection unit 228 determines whether or not the received power measured for the other base station apparatus 2b satisfies a predetermined strength condition. For example, the hall detection unit 228 may determine whether the received power is equal to or greater than a predetermined threshold. As the predetermined strength condition, various conditions for determining the strength of the received power can be employed. The same applies to other embodiments.
- operation CD: Y If the received power satisfies a predetermined strength condition (operation CD: Y), the process proceeds to operation CE. If the received power does not satisfy the predetermined strength condition (operation CD: N), the process proceeds to operation CF.
- the hole detection unit 228 determines that the generation of the hole area is not detected. On the other hand, in the operation CF, the hole detection unit 228 determines that the generation of the hole area has been detected.
- FIG. 12 is an explanatory diagram of a second example of the hole detection process.
- the following operations DA to DD may be steps.
- the serving station is a base station apparatus in which the best received power is measured. Therefore, the second best received power is the best received power that the user apparatus 3 can receive when the serving station stops. For this reason, if the second best received power satisfies a desired strength condition, it can be estimated that no hole will be generated even if the serving station stops.
- the notification item designation information it is specified in the notification item designation information that the measurement result measured for “the base station apparatus in which the second best received power is measured” is notified.
- the user apparatus 3 transmits to the base station apparatus 2 a measurement result measured for the base station apparatus for which the second best received power is measured.
- the measurement result receiving unit 227 receives the measurement result transmitted from the user device 3.
- the hall detection unit 228 determines whether or not the received power in the received measurement result satisfies a predetermined intensity condition. If the received power satisfies a predetermined strength condition (operation DB: Y), the process proceeds to operation DC. If the received power does not satisfy the predetermined strength condition (operation DB: N), the processing proceeds to operation DD.
- the hole detection unit 228 determines that the generation of the hole area is not detected. In operation DD, the hole detection unit 228 determines that the generation of the hole area has been detected.
- FIG. 13 is an explanatory diagram of a third example of hole detection processing.
- the following operations EA to EE may be steps.
- the occurrence of a hole area is detected by determining whether or not received power exceeding a desired strength can be obtained from a base station apparatus other than the serving station.
- it is specified in the notification item designation information that the measurement result measured for “the base station apparatus in which the received power satisfying the predetermined strength condition is measured” is notified.
- the user apparatus 3 transmits to the base station apparatus 2 a measurement result measured with respect to the base station apparatus whose received power satisfying a predetermined intensity condition is measured.
- base station apparatus 2a a base station apparatus serving as a serving station
- base station apparatus 2b another base station apparatus
- the measurement result receiving unit 227 receives the measurement result transmitted from the user device 3.
- the hall detection unit 228 extracts the measurement results measured for the base station device 2b other than the base station device 2a, included in the received measurement results.
- the hole detection unit 228 determines whether or not there is a measurement result related to the other base station apparatus 2b. If there is a measurement result related to the other base station apparatus 2b (operation EC: Y), the processing proceeds to operation ED. When there is no measurement result regarding the other base station apparatus 2b (operation EC: N), the processing proceeds to operation EE.
- the hole detection unit 228 determines that the generation of the hole area is not detected. On the other hand, in operation EE, the hole detection unit 228 determines that the occurrence of a hole area has been detected.
- the present embodiment it is possible to predict in advance the occurrence of a hole area due to the stop of the transmission output of the base station device. For this reason, it is possible to predict the occurrence of the hole area when the transmission output of the base station apparatus is stopped without causing an actual radio link failure, and to reduce the generation of the hole area.
- the occurrence of a hole area is predicted according to the received power of the user apparatus immediately before the base station apparatus stops transmission output. For this reason, it is possible to dynamically determine the occurrence of the hole area at the position where the user device actually exists. As a result, it is possible to reduce the occurrence of a radio link failure when the transmission output of the base station apparatus is stopped.
- FIG. 14 is a configuration diagram of a second example of the base station apparatus 2. Components that are the same as those shown in FIG. 3 are given the same reference numerals. The operation of the components denoted by the same reference numerals is the same unless otherwise described. Further, other embodiments may include the components shown in FIG. 14 and their functions. 14 and 15, the own station may be referred to as “base station apparatus 2 a” and the other base station apparatus may be referred to as “base station apparatus 2 b”.
- the hall detection unit 228 of the present example determines the current transmission power with respect to the maximum transmission power of the other base station device 2b.
- the margin That is, even if the received power in the measurement result received from the user apparatus 3 does not satisfy the predetermined strength condition, a hole area is generated if the value obtained by adding the transmission power margin to the received power in the measurement result satisfies the condition. Judge not to.
- the base station apparatus 2 includes a margin information receiving unit 240 and a correction requesting unit 241.
- the margin information receiving unit 240 receives margin information indicating a transmission power margin from another base station apparatus 2b.
- the correction request unit 241 sends the correction to the base station apparatus 2b.
- the transmission power correction is requested so as to increase the transmission power.
- FIG. 15 is an explanatory diagram of a fourth example of hole detection processing.
- the following operations FA to FI may be steps.
- the measurement result receiving unit 227 receives the measurement result transmitted from the user device 3.
- the hall detection unit 228 adds a margin of transmission power of each base station apparatus 2 to the reception intensity in the received measurement result.
- the hall detection unit 228 extracts the measurement results measured for the other base station apparatus 2b included in the received measurement results.
- the hall detection unit 228 determines whether there is a measurement result related to the other base station device 2b. If there is a measurement result regarding another base station apparatus 2b (operation FD: Y), the processing proceeds to operation FE. If there is no measurement result regarding the other base station apparatus 2b (operation FD: N), the processing proceeds to operation FI.
- the hall detection unit 228 determines whether or not the received power measured for the other base station apparatus 2b satisfies a predetermined strength condition. If the received power satisfies a predetermined strength condition (operation FE: Y), the processing proceeds to operation FF. If the received power does not satisfy the predetermined strength condition (operation FE: N), the process proceeds to operation FI.
- the hall detection unit 228 determines whether or not a predetermined strength condition is satisfied without adding a transmission power margin. If the predetermined intensity condition is satisfied without adding a margin (operation FF: Y), the process proceeds to operation FH. If the predetermined strength condition is not satisfied without a margin (operation FF: N), the process proceeds to operation FG.
- the correction request unit 241 requests the transmission power correction to increase the transmission power to the other base station apparatus 2b. Thereafter, the process proceeds to operation FH.
- operation FH the hole detection unit 228 determines that the generation of the hole area is not detected.
- operation FI the hole detection unit 228 determines that the occurrence of a hole area has been detected.
- the transmission power of the other base station apparatus 2b is reduced.
- FIG. 16 is a configuration diagram of a third example of the base station apparatus 2. Components that are the same as those shown in FIG. 3 are given the same reference numerals. The operation of the components denoted by the same reference numerals is the same unless otherwise described. In addition, other embodiments may include the components shown in FIG. 16 and their functions.
- the base station apparatus 2 of this example determines whether or not to stop the transmission output from the base station apparatus 2 based on the hole information created by the hole information creation unit 229.
- an ES operation control unit 250 and a usage state measurement unit 251 are provided.
- the ES operation control unit 250 may be an example of an output availability determination unit.
- the server apparatus 4 since the base station apparatus 2 determines whether or not to stop the transmission output based on the hall information, the server apparatus 4 may be omitted from the communication system 1.
- the usage state measurement unit 251 measures the usage rate of the radio resource in the base station apparatus 2.
- the usage state measurement unit 251 outputs the measurement result to the ES operation control unit 250.
- the usage state measurement unit 251 transmits the measurement result to another adjacent base station device 2 via the network interface 222.
- the own station may be referred to as “base station apparatus 2a” and the other base station apparatus may be referred to as “base station apparatus 2b”.
- the ES operation control unit 250 includes a usage state reception unit 252 that receives the measurement result of the usage rate of the radio resource received from another adjacent base station apparatus 2b.
- the ES operation control unit 250 generates an ES request event based on the usage rate of the radio resource of the base station device 2a and the usage rate of the radio resource of another adjacent base station device 2b.
- the hole information creation unit 229 In response to the occurrence of the ES request event, the hole information creation unit 229 generates hole information.
- the ES operation control unit 421 determines whether or not to stop the transmission output from the base station apparatus 2a based on the received hall information. When stopping the transmission output from the base station apparatus 2a, the ES operation control unit 250 transmits output stop information indicating that the transmission output is stopped to the other base station apparatus 2b via the network interface 222. The ES operation control unit 421 causes the degenerate operation control unit 230 to stop the transmission output of the base station device 2a.
- the ES operation control unit 421 receives the output stop information from the other base station device 2b when the other base station device 2b stops the transmission output.
- the ES operation control unit 421 transmits a request signal requesting transmission output to another base station device 2b whose output is stopped when the usage rate of the radio resource in the base station device 2a is not within the predetermined range. Is provided.
- the ES operation control unit 421 includes a request reception unit 254 that receives a request signal transmitted from another base station apparatus 2b.
- the ES operation control unit 421 causes the degenerate operation control unit 230 to restart the transmission output of the base station apparatus 2a.
- request signals may be transmitted / received via the network interface 222.
- the server apparatus 4 is omitted from the communication system 1 and the base station apparatus 2 determines whether or not transmission output can be stopped. Can be dispersed.
- FIG. 17 is a configuration diagram of a fourth example of the base station apparatus 2. Components that are the same as those shown in FIG. 3 are given the same reference numerals. The operation of the components denoted by the same reference numerals is the same unless otherwise described. In addition, other embodiments may include the components shown in FIG. 17 and their functions.
- FIG. 18 is a configuration diagram of a second example of the user device 3. Components that are the same as those shown in FIG. 5 are given the same reference numerals. The operation of the components denoted by the same reference numerals is the same unless otherwise described. Further, other embodiments may include the components shown in FIG. 18 and their functions.
- the base station apparatus 2a stops the transmission output. Whether handover is possible is determined according to the remaining time up to the scheduled time.
- the base station apparatus 2 includes a handover control unit 260 and a handover command transmission unit 261.
- the user device 3 includes a handover command receiving unit 340 and a handover control unit 341.
- the handover control unit 260 may be an example of a handover availability determination unit and an instruction unit.
- FIG. 19 is an explanatory diagram of processing when the user apparatus 3 in the measurement execution state performs a handover from the cell of the serving station 2a to the cell of another base station apparatus 2b.
- the following operations GA to GM may be steps.
- the event detection unit 223 of the base station device 2a detects the occurrence of an ES request event. At this point, the user apparatus 3a is in an idle state.
- the active command unit 231 transmits an active command to the user device 3a.
- the user apparatus 3a transitions to the active state.
- the instruction transmission unit 225 transmits an instruction signal to the user device 3.
- the user apparatus 3a transitions to the measurement execution state.
- the notification period N after the transition to the measurement execution state starts, the user apparatus 3a notifies the base station apparatus 2a of the measurement result obtained by measuring the received power from the base station apparatus 2 in operation GE.
- the measurement results notified from the user apparatus 3 a to the base station apparatus 2 a include a measurement result used for detection processing by the hole detection unit 228 and a measurement result used for handover determination by the handover control unit 260.
- the handover control unit 260 inputs the measurement result for handover determination received by the measurement result receiving unit 227.
- the handover control unit 260 determines the handover of the user apparatus 3a from the base station apparatus 2a to the base station apparatus 2b.
- the handover command transmission unit 261 transmits to the user device 3a a handover command for handing over the user device 3a from the base station device 2a to the base station device 2b.
- the handover command receiving unit 340 of the user device 3a receives the handover command.
- the handover command receiving unit 340 notifies the handover control unit 341 of reception of the handover command.
- the handover control unit 341 causes the state change unit 323 to change the operation state of the user apparatus 3 to the handover active state even before the notification period N has elapsed.
- the measurement information generation unit 326 and the measurement result transmission unit 327 stop the measurement result notification.
- the handover control unit 341 executes a handover process from the base station apparatus 2a to the base station apparatus 2b.
- the measurement process control unit 322 and the state change unit 323 return the user apparatus 3a to the idle state in accordance with the designation of the operation state included in the instruction signal.
- the base station apparatus 2a detects the hole area, generates and transmits hole information, receives the stop instruction of the transmission output, and the base station apparatus in the same manner as AF1 to AFn, AG, and AH shown in FIG. 2 stop transmission output.
- the measurement result by the user apparatus 3 becomes unnecessary.
- the present embodiment by returning the operation state of the user device 3 from the measurement execution state to the original state, useless measurement processing and notification processing can be omitted, and radio resources required for notification can be saved. .
- the event detection unit 223 of the base station device 2a detects the occurrence of an ES request event.
- the user apparatus 3a is in an active state at this time and is located in the cell of the base station apparatus 2b.
- the user apparatus 3a notifies the measurement result for handover determination to the base station apparatus 2b.
- the base station apparatus 2b inquires of the base station apparatus 2a whether or not handover is possible.
- the handover control unit 260 of the base station device 2a determines whether or not handover is possible. Handover availability determination processing by the handover control unit 260 will be described later.
- the handover control unit 260 When the handover control unit 260 permits the handover, in operation HE, the handover control unit 260 transmits a permission signal for notifying the base station apparatus 2b of the handover permission via the network interface 222. Similarly, the handover control unit 260 transmits to the base station apparatus 2b timer information specifying a period M determined according to the remaining period until the time when transmission output is stopped.
- the timer information is designation information for a period during which the user apparatus 3a handed over to the base station apparatus 2a notifies the base station apparatus 2a of the measurement result of the received power from the base station apparatus 2.
- the base station device 2b transmits a permission signal and timer information to the user device 3a.
- the handover control unit 341 of the user apparatus 3a When the handover control unit 341 of the user apparatus 3a receives the permission signal, the handover process from the base station apparatus 2b to the base station apparatus 2a is executed in operation HG.
- the instruction receiving unit 321 When receiving the timer information, notifies the measurement processing control unit 322 of the timer information.
- the measurement processing control unit 322 causes the state change unit 323 to transition the operation state of the user device 3 from the active state to the measurement execution state.
- the measurement processing control unit 322 outputs timer information to the time measurement unit 324.
- the time measuring unit 324 determines whether or not the period M indicated by the timer information has elapsed.
- User apparatus 3a transmits measurement results to base station apparatus 2a in operations HI1 to HIn during period M, respectively.
- the hole detection unit 228 detects a hole area that may occur when the transmission output from the base station apparatus 2a is stopped based on the measurement result.
- the base station apparatus 2a When the period M elapses, in operations HK and HL, the base station apparatus 2a generates and transmits hall information, receives a transmission output stop instruction, and transmits the transmission output of the base station apparatus 2 in the same manner as AG and AH shown in FIG. Stop.
- the measurement processing control unit 322 and the state change unit 323 return the user device 3a to the original active state.
- FIG. 21 is an explanatory diagram of a process for determining whether or not handover is possible.
- the following operations IA to IE may be steps.
- the base station apparatus 2a receives an inquiry from the base station apparatus 2b as to whether or not handover by the user apparatus 3a is possible.
- the handover control unit 260 of the base station device 2a inquires of the measurement processing control unit 224 whether or not the base station device 2a is performing hole area detection processing.
- operation IB If the base station device 2a is in the process of detecting the hall area (operation IB: Y), the processing proceeds to operation IC. If the base station apparatus 2a is not in the process of detecting the hole area (operation IB: N), the process proceeds to operation ID.
- the handover control unit 260 determines whether there is a margin in the remaining period until the scheduled time to stop transmission output. For example, the handover control unit 260 determines whether or not the remaining period until the scheduled time to stop transmission output is longer than the connection processing time in the handover. If there is a margin in the remaining period (operation IC: Y), the process proceeds to operation ID. If there is no remaining period (operation IC: N), the process proceeds to operation IE.
- the handover control unit 260 permits the handover.
- the handover control unit 260 prohibits handover.
- FIG. 22 shows the processing when handover is prohibited.
- the following operations HA to HD, HJ to HL, and HN may be steps.
- Operations HA to HD and HJ to HL are the same as the operations HA to HD and HJ to HL shown in FIG.
- the handover control unit 260 transmits a handover disapproval signal to the base station apparatus 2b.
- the base station apparatus 2b does not start the handover process for the user apparatus 3a, the handover of the user apparatus 3a is not executed.
- the user apparatus when the user apparatus attempts to perform handover after the occurrence of an ES request event, whether or not handover is possible is determined according to the remaining time until the scheduled stop time of transmission output. For this reason, it is possible to prevent a ping-pong phenomenon that occurs when the transmission output of the base station apparatus 2 stops during the handover connection process.
- the present embodiment it is possible to receive a measurement result notification from a user apparatus that is handed over after the occurrence of an ES request event. For this reason, the accuracy of hole detection is improved.
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Abstract
Description
2a、2b 基地局装置
3a、3b ユーザ装置
227 測定結果受信部
228 ホール検出部
325 受信電力測定部
326 測定情報生成部
327 測定結果送信部
Claims (23)
- 少なくとも第1基地局装置及び第2基地局装置を含む複数の基地局装置と、移動局装置を備える通信システムであって、
前記移動局装置は、
前記複数の基地局装置からの受信電力をそれぞれ測定する測定部と、
前記複数の基地局装置のうち前記移動局装置が位置するセルをカバーする基地局装置へ、前記受信電力の測定結果を通知する測定結果通知部と、を備え、
前記第1基地局装置は、
前記移動局装置が前記第1基地局装置のセル内に位置する場合に通知された前記測定結果を受信する測定結果受信部と、
前記移動局装置が前記第1基地局装置以外の他の基地局装置からの受信電力を測定した測定結果に基づいて、前記第1基地局装置からの送信出力を停止する場合に生じうるホールエリアを検出するホール検出部と、
を備えることを特徴とする通信システム。 - 前記測定結果通知部は、最も良い受信電力が測定された基地局装置と、2番目に良好な受信電力が測定された基地局装置と、に関してそれぞれ測定された測定結果を通知することを特徴とする請求項1に記載の通信システム。
- 前記ホール検出部は、前記他の基地局装置に関して測定された測定結果を前記移動局装置から受信しないとき、ホールエリアが生じると判定することを特徴とする請求項2に記載の通信システム。
- 前記ホール検出部は、前記他の基地局装置に関して測定された受信電力が所定の強度条件を満たさないとき、ホールエリアが生じると判定することを特徴とする請求項2に記載の通信システム。
- 前記測定結果通知部は、2番目に良好な受信電力が測定された基地局装置に関して測定された測定結果を通知することを特徴とする請求項1に記載の通信システム。
- 前記ホール検出部は、前記移動局装置から測定結果が通知された基地局装置に関して測定された受信電力が所定の強度条件を満たさないとき、ホールエリアが生じると判定することを特徴とする請求項5に記載の通信システム。
- 前記測定結果通知部は、所定の強度条件を満たす受信電力が測定された基地局装置に関して測定された測定結果を通知することを特徴とする請求項1に記載の通信システム。
- 前記ホール検出部は、前記他の基地局装置について測定された測定結果を前記移動局装置から受信しないとき、ホールエリアが生じると判定することを特徴とする請求項7に記載の通信システム。
- 前記第1基地局装置は、前記第1基地局装置のセルに位置する前記移動局装置に前記測定結果を通知させる指示信号を送信する指示送信部を備えることを特徴とする請求項1~8にいずれか一項に記載の通信システム。
- 前記指示信号は、前記複数の基地局装置のうちいずれの基地局装置に関する測定結果を前記第1基地局装置へ送信するかを選択するための条件の指定を含むことを特徴とする請求項9に記載の通信システム。
- 前記第1基地局装置は、前記第1基地局装置からの送信出力の停止を要求するイベントを検出するイベント検出部を備え、
前記指示送信部は、前記イベントが検出された場合に前記指示信号を送信することを特徴とする請求項9又は10に記載の通信システム。 - 前記移動局装置は、前記測定結果を送信可能なアクティブ状態と前記測定結果を送信できないアイドル状態とを含む少なくとも2つの状態を有し、
前記指示送信部は、前記イベントが検出された時に前記アクティブ状態にある前記移動局装置にのみ前記指示信号を送信することを特徴とする請求項11に記載の通信システム。 - 前記移動局装置は、前記測定結果を送信可能なアクティブ状態と前記測定結果を送信できないアイドル状態とを含む少なくとも2つの状態を有し、
前記第1基地局装置は、
前記イベントの検出に応答して、前記アイドル状態の前記移動局装置を前記アクティブ状態に遷移させるアクティブ指令部を備え、
前記指示送信部は、前記アクティブ指令部により前記アクティブ状態に遷移する前記移動局装置へ前記指示信号を送信することを特徴とする請求項11に記載の通信システム。 - 前記指示信号は、前記移動体装置が前記測定結果の通知を行う通知期間の指定を含み、
前記移動局装置は、前記通知期間の経過を検出する時間測定部を備え、
前記測定結果通知部は、前記通知期間経過時に前記測定結果の通知を停止することを特徴とする請求項9~13のいずれか一項に記載の通信システム。 - 前記移動局装置が前記第1基地局装置のセルから前記第2基地局装置のセルへハンドオーバする場合に、前記測定結果通知部は前記測定結果の通知を停止することを特徴とする請求項9~14のいずれか一項に記載の通信システム。
- 前記第1基地局装置は、前記送信出力の停止を行う時刻までの残存期間に応じて、前記第2基地局装置のセルから前記第1基地局装置のセルへの前記移動局装置のハンドオーバの可否を判定するハンドオーバ可否判定部を備えることを特徴とする請求項11~14のいずれか一項に記載の通信システム。
- 前記第1基地局装置は、前記第1基地局装置のセルへハンドオーバする前記移動局装置に前記測定結果を通知させる信号を、前記第2基地局装置を介して前記移動局装置へ送信する指示部を備え、
前記指示部から送信される信号は、前記残存期間に応じて定めた前記通知期間の指定を含むことを特徴とする請求項16に記載の通信システム。 - 前記第1基地局装置は、前記他の基地局装置の送信電力のマージンに関する情報を前記他の基地局装置から受信するマージン情報受信部を備え、
前記ホール検出部は、前記他の基地局装置について測定された受信電力に前記マージンを加えた値に基づいて前記ホールエリアを検出することを特徴とする請求項1~17のいずれか一項に記載の通信システム。 - 前記第1基地局装置は、前記ホール検出部によるホールエリアの検出結果に基づいて、前記第1基地局装置からの送信出力を停止するか否かを判定する出力可否判定部を備えることを特徴とする請求項1~18のいずれか一項に記載の通信システム。
- 前記出力可否判定部は、前記第1基地局装置からの送信出力を要求する要求信号を前記他の基地局装置から受信する要求受信部を備え、
前記出力可否判定部は、前記要求受信部が前記要求信号を受信した場合に前記第1基地局装置からの送信出力を再開することを特徴とする請求項19に記載の通信システム。 - 複数の基地局装置と移動局装置を備える通信システムのカバーエリアに生じるホールエリアの検出方法であって、
前記複数の基地局装置からの受信電力を前記移動局装置においてそれぞれ測定し、
前記複数の基地局装置のうち、前記移動局装置が位置するセルをカバーする基地局装置以外の他の基地局装置からの受信電力に基づいて、前記移動局装置が位置するセルをカバーする前記基地局装置からの送信出力を停止する場合に生じうるホールエリアを検出する、ことを特徴とする検出方法。 - 基地局装置であって、
前記基地局装置がカバーするセル内に位置する移動局装置から、前記移動局装置によってそれぞれ測定された前記複数の基地局装置からの受信電力の測定結果を受信する測定結果受信部と、
前記移動局装置が前記基地局装置以外の他の基地局装置からの受信電力を測定した測定結果に基づいて、前記基地局装置からの送信出力を停止する場合に生じうるホールエリアを検出するホール検出部と、を備えることを特徴とする基地局装置。 - 移動局装置であって、
複数の基地局装置のうち前記移動局装置が位置するセルをカバーする基地局装置から、前記基地局装置の受信電力の測定結果を通知させる指示信号を受信する指示受信部と、
前記複数の基地局装置からの受信電力をそれぞれ測定する測定部と、
前記移動局装置が位置するセルをカバーする前記基地局装置へ、前記測定結果を通知する測定結果通知部と、
を備えることを特徴とする移動局装置。
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PCT/JP2011/051214 WO2012101738A1 (ja) | 2011-01-24 | 2011-01-24 | 通信システム、ホールエリアの検出方法、基地局装置及び移動局装置 |
JP2012554517A JP5516758B2 (ja) | 2011-01-24 | 2011-01-24 | 通信システム、ホールエリアの検出方法、基地局装置及び移動局装置 |
EP11857047.2A EP2670182A4 (en) | 2011-01-24 | 2011-01-24 | COMMUNICATION SYSTEM, HOLE AREA DETECTION METHOD, BASIC STATION DEVICE AND MOBIL STATION APPARATUS |
KR1020137015279A KR101520559B1 (ko) | 2011-01-24 | 2011-01-24 | 통신 시스템, 홀 에어리어의 검출 방법, 기지국 장치 및 이동국 장치 |
CN201180064792.3A CN103299666B (zh) | 2011-01-24 | 2011-01-24 | 通信系统、空洞区的检测方法、基站装置和移动站装置 |
US13/892,902 US9049604B2 (en) | 2011-01-24 | 2013-05-13 | Communication system, method of detecting hole area, base station apparatus, and mobile station apparatus |
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PCT/JP2011/051214 WO2012101738A1 (ja) | 2011-01-24 | 2011-01-24 | 通信システム、ホールエリアの検出方法、基地局装置及び移動局装置 |
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US13/892,902 Continuation US9049604B2 (en) | 2011-01-24 | 2013-05-13 | Communication system, method of detecting hole area, base station apparatus, and mobile station apparatus |
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US (1) | US9049604B2 (ja) |
EP (1) | EP2670182A4 (ja) |
JP (1) | JP5516758B2 (ja) |
KR (1) | KR101520559B1 (ja) |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015115356A1 (ja) * | 2014-01-31 | 2015-08-06 | 京セラ株式会社 | 通信制御方法及び基地局 |
JP7486659B2 (ja) | 2020-07-31 | 2024-05-17 | チャイナ・テレコム・コーポレーション・リミテッド | 基地局の省エネルギー処理方法及び処理装置 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8995255B2 (en) * | 2012-08-03 | 2015-03-31 | Intel Corporation | Coverage adjustment in E-UTRA networks |
JP6912936B2 (ja) * | 2017-05-16 | 2021-08-04 | アライドテレシスホールディングス株式会社 | カバレッジホール検出装置および方法 |
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- 2011-01-24 CN CN201180064792.3A patent/CN103299666B/zh not_active Expired - Fee Related
- 2011-01-24 KR KR1020137015279A patent/KR101520559B1/ko not_active IP Right Cessation
- 2011-01-24 JP JP2012554517A patent/JP5516758B2/ja not_active Expired - Fee Related
- 2011-01-24 WO PCT/JP2011/051214 patent/WO2012101738A1/ja active Application Filing
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WO2015115356A1 (ja) * | 2014-01-31 | 2015-08-06 | 京セラ株式会社 | 通信制御方法及び基地局 |
US9572118B2 (en) | 2014-01-31 | 2017-02-14 | Kyocera Corporation | Communication control method and base station |
JPWO2015115356A1 (ja) * | 2014-01-31 | 2017-03-23 | 京セラ株式会社 | システム、基地局、及びプロセッサ |
US9794897B2 (en) | 2014-01-31 | 2017-10-17 | Kyocera Corporation | Communication control method and base station |
JP7486659B2 (ja) | 2020-07-31 | 2024-05-17 | チャイナ・テレコム・コーポレーション・リミテッド | 基地局の省エネルギー処理方法及び処理装置 |
Also Published As
Publication number | Publication date |
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KR101520559B1 (ko) | 2015-05-14 |
JPWO2012101738A1 (ja) | 2014-06-30 |
KR20130088168A (ko) | 2013-08-07 |
CN103299666A (zh) | 2013-09-11 |
JP5516758B2 (ja) | 2014-06-11 |
EP2670182A4 (en) | 2016-07-27 |
CN103299666B (zh) | 2016-05-11 |
US9049604B2 (en) | 2015-06-02 |
US20130244643A1 (en) | 2013-09-19 |
EP2670182A1 (en) | 2013-12-04 |
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