WO2014185185A1 - 通信制御装置、通信制御方法、端末装置及び情報処理装置 - Google Patents
通信制御装置、通信制御方法、端末装置及び情報処理装置 Download PDFInfo
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- WO2014185185A1 WO2014185185A1 PCT/JP2014/059681 JP2014059681W WO2014185185A1 WO 2014185185 A1 WO2014185185 A1 WO 2014185185A1 JP 2014059681 W JP2014059681 W JP 2014059681W WO 2014185185 A1 WO2014185185 A1 WO 2014185185A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
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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
Definitions
- the present disclosure relates to a communication control device, a communication control method, a terminal device, and an information processing device.
- LTE Long Term Evolution
- LTE-A Advanced
- 3GPP Third Generation Partnership Project
- six types of bandwidths of 1.4 MHz, 3 MHz, 5 MHz, 10 MHz, 15 MHz, and 20 MHz are defined as channel bandwidths of LTE and LTE-A.
- the band for mobile communication allocated in each country is not necessarily a band having the above-described bandwidth. Therefore, there is a possibility that a part of the allocated bandwidth is left over. It is desirable that such a surplus band other than the band of the predetermined bandwidth in the allocated frequency band is also effectively used.
- Patent Document 1 discloses that the terminal device performs wireless communication not only in the component carrier but also in a band between other component carriers adjacent to the component carrier.
- the terminal device When the terminal device performs wireless communication even in a surplus band other than the predetermined bandwidth among the frequency bands allocated to the service provider, the terminal device can be used as long as the surplus band is also a used band. It is conceivable to perform measurement in the remaining band. However, in that case, the terminal apparatus performs measurement in a band having a predetermined bandwidth and a surplus band (that is, a wider band). As a result, the measurement load on the terminal device may increase.
- the acquisition unit that acquires the measurement related information related to the execution of the measurement by the terminal device in the extended band other than the band of the predetermined bandwidth among the frequency bands allocated to the operator, and the measurement related information
- a control unit that performs control related to measurement by the terminal device in the extended band.
- the measurement related information related to the execution of the measurement by the terminal device in the extension band other than the band of the predetermined bandwidth among the frequency bands allocated to the operator, and the measurement related Based on the information a communication control method including performing control related to measurement by the terminal device in the extended band is provided.
- a recognition unit that recognizes an extension band other than a band of a predetermined bandwidth among frequency bands assigned to a provider, and a part or all of the measurement in the extension band is not performed.
- a control unit that controls the execution of the measurement.
- an information processing apparatus including a memory that stores a predetermined program and a processor that can execute the predetermined program.
- the predetermined program performs measurement so as to recognize an extension band other than a band having a predetermined bandwidth in a frequency band allocated to an operator and to prevent a part or all of the measurement in the extension band from being performed.
- FIG. 10 is a sequence diagram illustrating an example of processing from measurement to handover determination.
- 2 is an explanatory diagram illustrating an example of a schematic configuration of a communication system according to an embodiment of the present disclosure.
- FIG. It is a block diagram which shows an example of a structure of eNodeB which concerns on 1st Embodiment. It is a block diagram which shows an example of a structure of UE which concerns on 1st Embodiment.
- CC component carrier
- extension band It is explanatory drawing for demonstrating the 1st example of another kind of event which triggers the report of the measurement result (2nd measurement result) in an extended band.
- Carrier aggregation -Component carrier
- a maximum of five component carriers (CC) are bundled and used by user equipment (UE).
- Each CC is a band having a maximum width of 20 MHz.
- carrier aggregation there are cases where CCs that are continuous in the frequency direction are used and CCs that are separated in the frequency direction are used.
- carrier aggregation it is possible to determine the CC to be used for each UE.
- one of a plurality of CCs used by the UE is a special CC.
- the one special CC is called a PCC (Primary Component Carrier).
- the remainder of the plurality of CCs is called SCC (Secondary Component Carrier).
- the PCC may vary from UE to UE. Hereinafter, this point will be described more specifically with reference to FIG.
- FIG. 1 is an explanatory diagram for explaining an example of the PCC of each UE.
- UE 20A and UE 20B and five CCs 1-5 are shown.
- the UE 20A uses two CCs, CC1 and CC2.
- UE20A is using CC2 as PCC.
- the UE 20B uses two CCs, CC2 and CC4.
- UE20B is using CC4 as PCC. In this way, each UE may use a different CC as the PCC.
- the PCC is the most important CC among a plurality of CCs, it is desirable that the communication quality is the most stable CC. Note that which CC is used as a PCC actually depends on how it is mounted.
- the CC where the UE first establishes a connection is the PCC for the UE.
- the SCC is added to the PCC. That is, PCC is a main frequency band, and SCC is an auxiliary frequency band.
- the SCC is changed by deleting an existing SCC and adding a new SCC.
- the PCC is changed by a conventional inter-frequency handover procedure. In the carrier aggregation, the UE cannot use only the SCC, and always uses one PCC.
- PCC is sometimes called a primary cell.
- SCC may be called a secondary cell (Secondary Cell).
- a common reference signal (CRS) is transmitted in each CC.
- the common reference signal is also called a cell-specific reference signal.
- the bandwidth of the component carrier (CC) is selected from six types of bandwidths.
- the frequency bandwidth allocated to the operators in each country is often different from the above six types of bandwidth. For example, in Germany, a band of 3.8 MHz or 7.2 MHz is allocated. In Italy, a band of 11.8 MHz or 12.4 MHz is allocated. In Slovakia, a band of 6 MHz or 7 MHz is allocated.
- FIG. 2 is an explanatory diagram for explaining an example of the extension band.
- the 6 MHz frequency band allocated to the operator is shown.
- the 5 MHz band is used as the CC.
- a band other than the 5 MHz CC in the 6 MHz frequency band is an extension band.
- two bands of 0.5 MHz are extension bands.
- the bandwidth of the extension band may be less than 1.4 MHz. For this reason, it is considered undesirable to treat the extension band as individual CCs. Therefore, it is considered that the extension band is desirably handled as a band accompanying the CC.
- Measurement means measuring the quality of the transmission line. The measurement is performed by the UE. And the result of the said measurement is reported to eNodeB (Evolved Node B) by UE.
- eNodeB Evolved Node B
- the frequency band used in the serving cell is the measurement target. That is, it is a frequency band used for radio communication with the eNodeB to which the UE is connected. In the case of carrier aggregation, PCC and SCC are measurement targets.
- the frequency band in the white list included in the system information transmitted by the eNodeB is the frequency band to be measured.
- the frequency band detected by the UE is the frequency band to be measured.
- RSRP Reference Signal Received Power
- RSRQ Reference Signal Received Quality
- RSRP is the result of measuring CRS power. Since the CRS is a signal specific to each cell, the received power from which the interference component is eliminated is measured by using the CRS. Also, RSRP is averaged over a period of time to eliminate fading effects. To obtain reliable results, the CRS received power is averaged over a period of time, which can require significant computational cost and power consumption at the UE. It can be said that the measurement is a process that places a heavy load on the UE. Therefore, if extra measurements can be reduced, the calculation cost and power consumption of the UE can be reduced.
- RSRQ is calculated from RSRP and RSSI (Received Signal Strength Indicator). Normally, the UE reports both RSRP and RSRQ.
- -CRS and antenna port CRS can be transmitted for each antenna port.
- a CRS for each of up to four antenna ports may be transmitted.
- the CRS is transmitted at a position corresponding to the antenna port (that is, a resource element).
- FIG. 3 is an explanatory diagram for explaining an example of CRS of each antenna port.
- resource blocks corresponding to each of four antenna ports (antenna ports 0 to 3) are shown.
- the CRS is transmitted by the resource element 41 in the resource block 40 corresponding to each antenna port port.
- the resource element 43 is a DTX (Discontinuous Transmission) resource element for protecting CRS of other antenna ports.
- the resource element 45 is a resource element for a control signal or data signal other than CRS. In this way, the CRS is transmitted with a separate resource element for each antenna port.
- a channel response between the virtual four antennas and the UE can be obtained. If the UE has two antennas, a 4 ⁇ 2 matrix size channel response is obtained. Since the CRS is not multiplied by a weighting factor for beam forming on the transmission side, a pure channel response can be obtained.
- CRS CRS CRS-Purpose of CRS CRS has been in release 8 and is used for various purposes.
- CRS is used for measurement.
- CRS is used to obtain channel information.
- CRS is also used for CQI (Chanel Quality Indicator) feedback to the eNodeB.
- CQI Channel Quality Indicator
- CSI-RS Channel State Information Reference Signal
- DMRS Demodulation Reference Signal
- CRS is an important reference signal (RS) for measurement.
- RSRP and RSSQ are used for cell selection, cell reselection, and handover.
- RRC connected (RRC_Connected) state For example, when the UE is in the RRC connected state, the measurement result reported by the UE is used, for example, for determination of handover. That is, the eNodeB makes a handover decision based on the measurement result reported by the UE.
- RRC_Connected RRC connected
- FIG. 4 is a sequence diagram illustrating an example of processing from measurement to determination of handover.
- the UE performs measurement (S31).
- any event occurs for reporting from the result of the measurement (S33).
- the said event triggers the report of the measurement result by UE, and UE reports a measurement result (S35).
- the eNodeB determines whether or not to perform handover based on the reported measurement result, and performs handover determination, for example (S37).
- the eNodeB determines a handover of the UE from one cell to another based on the measurement result. For example, a handover to a cell with the highest RSRP is determined.
- RRC idle (RRC_Idle) state when the UE is in the RRC idle state, the measurement result reported by the UE is used for cell selection, for example. That is, the UE performs measurement even when it is in an RRC (Radio Resource Control) idle state. Accordingly, the UE can select an optimal cell or eNodeB for receiving information on the paging channel, and can select an optimal cell or eNodeB for performing random access.
- RRC Radio Resource Control
- a predetermined event triggers the reporting of a measurement result by the UE. That is, when a predetermined event occurs (when a predetermined event condition is satisfied), the UE reports a measurement result to the eNodeB.
- a predetermined event occurs (when a predetermined event condition is satisfied)
- the UE reports a measurement result to the eNodeB.
- five types of events A1 to A5 are defined as the predetermined events.
- an event A6 for carrier aggregation is defined as the predetermined event.
- condition of event A1 is that the quality of the serving cell (for example, RSRP or RSRQ) becomes better than the threshold value.
- the condition of event A2 is that the quality of the serving cell becomes worse than the threshold value.
- the condition of event A3 is that the quality of the neighboring cell is better by the threshold than the quality of the serving cell.
- the condition of event A4 is that the quality of the neighboring cell is better than the threshold value.
- the condition of event A5 is that the quality of the serving cell becomes worse than the first threshold value, and the quality of the neighboring cell becomes better than the second threshold value.
- FIG. 5 is an explanatory diagram illustrating an example of a schematic configuration of the communication system 1 according to the embodiment of the present disclosure.
- the communication system 1 includes an eNodeB 100, a UE 20, and a UE 200.
- the communication system 1 is a system compliant with LTE, LTE-A or a communication standard equivalent thereto.
- the eNodeB 100 performs wireless communication in the frequency band assigned to the operator.
- the frequency band includes a predetermined bandwidth, and the eNodeB 100 performs wireless communication in the predetermined bandwidth.
- the predetermined bandwidth is a bandwidth defined in a communication standard. More specifically, for example, the predetermined bandwidth is a bandwidth defined in the 3GPP standard, and the band of the predetermined bandwidth is a component carrier (CC).
- CC component carrier
- the eNodeB 100 performs wireless communication in an extended band other than the CC among the frequency bands allocated to the operator.
- the eNodeB 100 performs radio communication with the UE located in the cell 10.
- the UE 20 is a UE that does not have the capability to use the extended band
- the UE 200 is a UE that has the capability to use the extended band.
- eNodeB100 performs radio
- the eNodeB 100 performs radio communication with the UE 200 in the extended band.
- the UE 20 When the UE 20 is located in the cell 10, the UE 20 performs radio communication with the eNodeB 100.
- the UE 20 does not have the capability of using the extension band, and performs radio communication with the eNodeB 100 in the CC in the frequency band assigned to the operator.
- the UE 20 is also called a legacy terminal.
- the UE 200 When the UE 200 is located in the cell 10, the UE 200 performs radio communication with the eNodeB 100.
- the UE 200 has the capability of using the extension band, and performs radio communication with the eNodeB 100 in the CC and the extension band.
- the UE when the UE performs radio communication in an extension band other than the component carrier (CC) in the frequency band allocated to the operator, the UE is used as long as the extension band is also a band to be used. However, it is conceivable to perform measurement even in the extended band. However, in that case, the UE will make measurements in the CC and extended bands (ie, wider bands). As a result, the measurement load for the UE may increase.
- CC component carrier
- the first embodiment of the present disclosure it is possible to suppress the measurement load by the UE when the allocated frequency band is used effectively (that is, when the extended band is also used). Specifically, in the first embodiment, execution of measurement by the UE in the extension band is controlled.
- FIG. 6 is a block diagram showing an example of the configuration of the eNodeB 100-1 according to the first embodiment.
- the eNodeB 100-1 includes an antenna unit 110, a wireless communication unit 120, a network communication unit 130, a storage unit 140, and a processing unit 150.
- the antenna unit 110 receives a radio signal and outputs the received radio signal to the radio communication unit 120.
- the antenna unit 110 transmits the transmission signal output from the wireless communication unit 120.
- the wireless communication unit 120 performs wireless communication in the frequency band assigned to the operator.
- the frequency band includes a predetermined bandwidth
- the wireless communication unit 120 performs wireless communication in the predetermined bandwidth.
- the predetermined bandwidth is a bandwidth defined in the 3GPP standard
- the predetermined bandwidth is CC.
- the wireless communication unit 120 performs wireless communication even in an extended band other than the CC among the frequency bands assigned to the operator.
- the radio communication unit 120 performs radio communication with the UE located in the cell 10.
- the eNodeB 100 performs radio communication with the UE 20 and the UE 200 in the CC. Further, the eNodeB 100 performs radio communication with the UE 200 in the extended band.
- the network communication unit 130 communicates with other communication nodes.
- the network communication unit 130 communicates with another eNodeB 100.
- the network communication unit 130 communicates with a communication node of the core network.
- the core network is an EPC (Evolved Packet Core)
- the communication node includes an MME (Mobility Management Entity), an S-GW (Serving Gateway), and the like.
- the storage unit 140 stores a program and data for the operation of the eNodeB 100.
- the processing unit 150 provides various functions of the eNodeB 100-1.
- the processing unit 150 includes an information acquisition unit 151 and a communication control unit 153.
- the information acquisition unit 151 acquires measurement related information related to execution of measurement by the UE in an extension band other than the component carrier (band of a predetermined bandwidth) in the frequency band assigned to the operator.
- the measurement related information is information regarding whether or not the UE performs measurement in the extension band.
- the measurement-related information includes first information corresponding to performing measurement in the extended band in the cell 10 and second information corresponding to not performing measurement in the extended band in the cell 10. One of them.
- the measurement related information is setting information of the eNodeB 100-1.
- the first information is setting information for controlling the UE to perform the measurement in the extension band in the cell 10
- the second information is the measurement in the extension band in the cell 10. Is setting information for controlling the UE so as not to execute.
- the setting information is set by an operator of the communication system 1.
- the measurement related information may be a determination result as to whether or not to perform measurement in the extended band in the cell 10.
- the first information is a determination result that the measurement in the extension band is performed in the cell 10
- the second information is a determination result that the measurement in the extension band is not performed in the cell 10. May be.
- the determination as to whether or not to perform measurement in the extended band in the cell 10 may be made based on the communication quality in the extended band. The determination may be performed by the information acquisition unit 151.
- the communication control unit 153 controls wireless communication within the cell 10.
- the communication control unit 153 performs control related to measurement by the UE in the extended band (hereinafter referred to as “measurement related control”) based on the measurement related information.
- the measurement related control includes control of measurement execution by the UE in the extension band. That is, the communication control unit 153 controls execution of measurement by the UE in the extended band based on the measurement related information.
- the measurement-related control includes instructing the UE 200-1 to perform measurement or not to perform measurement in the extension band.
- the measurement-related control includes instructing the UE 200-1 to perform measurement in the extension band and instructing the UE 200-1 not to perform measurement in the extension band. .
- the communication control unit 153 instructs the UE 200-1 to perform measurement in the extended band and not perform measurement in the extended band.
- the UE 200-1 performs measurement in the extended band.
- the UE 200-1 does not perform measurement in the extended band.
- the measurement related information includes the first information corresponding to the measurement in the extended band in the cell 10 and the measurement in the extended band in the cell 10. Any of the second information corresponding to not to be performed.
- the communication control unit 153 instructs the UE 200-1 to perform measurement in the extended band.
- the UE 200-1 performs measurement in the extended band.
- the communication control unit 153 instructs the UE 200-1 not to perform measurement in the extended band.
- the UE 200-1 does not perform measurement in the extended band.
- the measurement related control includes instructing the UE 200-1 not to perform measurement in the extended band, and instructing the UE 200-1 to perform measurement in the extended band. May not be included. That is, the communication control unit 153 may instruct the UE 200-1 not to perform measurement in the extended band, and may not instruct the UE 200-1 not to perform measurement in the extended band. In this case, for example, if there is an instruction from the eNodeB 100-1, the UE 200-1 does not perform measurement in the extended band, and if there is no instruction from the eNodeB 100-1, performs measurement in the extended band.
- the measurement related information includes the first information corresponding to the measurement in the extended band in the cell 10 and the measurement in the extended band in the cell 10. Any of the second information corresponding to not to be performed.
- the measurement related information is the first information
- the communication control unit 153 does not instruct the UE 200-1 not to perform measurement in the extended band.
- the UE 200-1 performs measurement in the extended band.
- the communication control unit 153 instructs the UE 200-1 not to perform measurement in the extended band.
- the UE 20 does not perform measurement in the extended band.
- the measurement related control includes instructing the UE 200-1 to perform measurement in the extension band, and instructing the UE 200-1 to not perform measurement in the extension band. It does not have to be. That is, the communication control unit 153 may instruct the UE 200-1 to perform measurement in the extended band and may not instruct the UE 200-1 not to perform measurement in the extended band. In this case, for example, if there is an instruction from the eNodeB 100-1, the UE 200-1 performs measurement in the extension band, and does not perform measurement in the extension band unless there is an instruction from the eNodeB 100-1.
- the measurement related information includes the first information corresponding to the measurement in the extended band in the cell 10 and the measurement in the extended band in the cell 10. Any of the second information corresponding to not to be performed.
- the communication control unit 153 instructs the UE 200-1 to perform measurement in the extended band.
- the UE 200-1 performs measurement in the extended band.
- the communication control unit 153 does not instruct the UE 200-1 to perform measurement in the extended band.
- the UE 20 does not perform measurement in the extended band.
- the communication control unit 153 instructs the UE 200-1 to execute or not execute the measurement through the radio communication unit 120 by individual signaling to the UE 200-1.
- the signaling is signaling at the time of Connection Setup.
- the signaling is RRC signaling.
- Such individual instructions make it possible to give separate instructions for each individual UE. That is, it is possible to cause one UE 200-1 to perform measurement in the extended band and prevent another UE 200-1 from performing measurement in the extended band.
- the communication control unit 153 may collectively instruct the UE 200-1 using system information. Such collective instructions can reduce signaling load and radio resource consumption by the eNodeB 100-1.
- measurement execution control by the UE in the extended band is controlled.
- the UE 200-1 can omit the measurement in the extension band. Therefore, when the allocated frequency band is effectively used (that is, when the extension band is also used), it is possible to suppress the measurement load by the UE 200-1.
- the bandwidth of the allocated frequency band may be 21 MHz, whereas the bandwidth of the extension band may be 1 MHz.
- the bandwidth of the allocated frequency band may be 6 MHz, whereas the bandwidth of the extension band may be 1 MHz.
- omitting the measurement in the extension band does not have a large impact on the whole, so the operator can determine that the measurement in the extension band is unnecessary. Then, the measurement in the extension band can be omitted.
- omitting the measurement in the extension band can have a large impact on the whole, so the operator can determine that the measurement in the extension band is necessary. Then, measurement in the extension band can be performed.
- the communication control unit 153 notifies the UE 200-1 of information on the extended band.
- the information related to the extension band includes information such as a bandwidth and / or a center frequency of the extension band.
- the communication control unit 153 notifies the UE 200-1 of the information related to the extended band based on the system information. Note that the communication control unit 153 may notify the UE 200-1 of the information related to the extended band by any signaling (signaling at the time of Connection Setup, RRC signaling, etc.).
- FIG. 7 is a block diagram showing an example of the configuration of the UE 200-1 according to the first embodiment.
- UE 200-1 includes an antenna unit 210, a radio communication unit 220, a storage unit 230, an input unit 240, a display unit 250, and a processing unit 260.
- the antenna unit 210 receives a radio signal and outputs the received radio signal to the radio communication unit 220.
- the antenna unit 210 transmits the transmission signal output from the wireless communication unit 220.
- the radio communication unit 220 performs radio communication with the eNodeB 100 when the UE 200 is located in the cell 10.
- the UE 200 has the capability of using the extension band, and the radio communication unit 220 performs radio communication with the eNodeB 100 in the predetermined width band and the extension band.
- the storage unit 230 stores a program and data for the operation of the UE 200.
- the input unit 240 receives input from the user of the UE 200. Then, the input unit 240 provides the input result to the processing unit 260.
- the display unit 250 displays an output screen (that is, an output image) from the UE 200.
- the display unit 250 displays an output screen in accordance with control by the processing unit 260 (display control unit 269).
- the processing unit 260 provides various functions of the UE 200-1.
- the processing unit 260 includes a band recognition unit 261, a measurement unit 263, a measurement control unit 265, a report unit 267, and a display control unit 269.
- the band recognizing unit 261 recognizes an extension band other than the component carrier (band of a predetermined bandwidth) in the frequency band assigned to the operator.
- the eNodeB 100-1 notifies the UE 200-1 of information on the extended band.
- the band recognition unit 261 acquires the information via the wireless communication unit 220 and recognizes the extension band. More specifically, for example, as described above, the information related to the extension band includes information such as the bandwidth and / or the center frequency of the extension band, and the band recognition unit 261 includes the bandwidth of the extension band. And / or recognizing the center frequency and the like.
- the measurement unit 263 performs measurement in the frequency band assigned to the operator.
- the above measurement is a measurement of the quality of the transmission line. More specifically, for example, the measurement is a measurement of RSRP and / or RSSQ.
- the measurement unit 263 measures RSRP using the control signal. That is, the measuring unit 263 measures RSRP by averaging the received power of the control signal.
- the control signal includes CRS and / or CSI-RS.
- the measurement unit 263 performs the above measurement according to control by the measurement control unit 265. For example, the measurement unit 263 performs measurement in a band specified by the measurement control unit 265. For example, the measurement unit 263 performs measurement in CC (band of a predetermined bandwidth). For example, the measurement unit 263 performs measurement in the CC and the extension band.
- the measurement control unit 265 controls the execution of measurement by the UE 200-1.
- the measurement control unit 265 controls the execution of measurement so that part or all of the measurement in the extended band is not performed.
- the allocated frequency band is effectively used (that is, when the extended band is also used), it is possible to suppress the measurement load by the UE 200-1.
- the measurement control unit 265 executes the measurement in the extension band according to the measurement-related control by the eNodeB 100-1 (that is, control related to the measurement by the UE in the extension band). To control. Then, the measurement control unit 265 controls the execution of the measurement so that part or all of the measurement in the extended band is not performed.
- the eNodeB 100-1 instructs the UE 200-1 to perform measurement in the extended band or not perform measurement. Then, the measurement control unit 265 causes the measurement unit 263 to perform the measurement in the extension band or does not cause the measurement unit 263 to perform the measurement in the extension band according to the instruction from the eNodeB 100-1.
- the eNodeB 100-1 instructs the UE 200-1 to perform measurement in the extended band and does not perform measurement in the extended band.
- the measurement control unit 265 causes the measurement unit 263 to perform measurement in the extended band.
- the measurement control unit 265 does not cause the measurement unit 263 to perform measurement in the extended band.
- the eNodeB 100-1 may instruct the UE 200 not to perform measurement in the extended band and may not instruct the UE 200 to perform measurement in the extended band.
- the measurement control unit 265 does not cause the measurement unit 263 to perform measurement in the extended band.
- the measurement control unit 265 causes the measurement unit 263 to perform measurement in the extension band.
- the eNodeB 100-1 may instruct the UE 200 to perform measurement in the extended band and may not instruct the UE 200 not to perform measurement in the extended band.
- the measurement control unit 265 causes the measurement unit 263 to perform measurement in the extended band.
- the measurement control unit 265 does not cause the measurement unit 263 to perform measurement in the extended band.
- the reporting unit 267 reports the measurement result by the UE 200-1 to the eNodeB 100-1.
- the measurement result includes RSRP and / or RSSQ. That is, the reporting unit 267 reports RSRP and / or RSSQ to the eNodeB 100-1 via the wireless communication unit 220.
- the display control unit 269 controls display of the output screen by the display unit 250. For example, the display control unit 269 generates an output screen displayed by the display unit 250 and causes the display unit 250 to display the output screen.
- FIG. 8 is a flowchart showing an example of a schematic flow of communication control processing on the eNodeB 100-1 side according to the first embodiment.
- the communication control process on the eNodeB 100-1 side is started when the operation of the eNodeB 100-1 is started or resumed.
- the information acquisition unit 151 acquires measurement related information related to execution of measurement by the UE in an extended band other than a CC (band of a predetermined bandwidth) among frequency bands assigned to a carrier.
- the measurement related information includes first information corresponding to performing measurement in the extended band in the cell 10 and second information corresponding to not performing measurement in the extended band in the cell 10. Either.
- step S303 the communication control unit 153 determines whether the measurement related information is the first information. If the measurement related information is the first information, the process proceeds to step S305. Otherwise (that is, if the measurement related information is the second information), the process proceeds to step S307.
- step S305 the communication control unit 153 instructs the UE 200-1 to perform measurement in the extended band via the wireless communication unit 120 by a predetermined means. Then, the process repeats step S305.
- step S307 the communication control unit 153 instructs the UE 200-1 via the wireless communication unit 120 not to perform measurement in the extended band by a predetermined means. Then, the process repeats step S307.
- the predetermined means may be individual signaling to the UE 200-1 or system information.
- FIG. 9 is a flowchart showing an example of a schematic flow of communication control processing on the UE 200-1 side according to the first embodiment.
- the communication control process on the UE 200-1 side starts when an instruction for measurement in the extended band is received from the eNodeB 100-1.
- step S401 the measurement control unit 265 determines whether the UE 200-1 is instructed by the eNodeB 100-1 to perform measurement in the extended band.
- the process proceeds to step S403. Otherwise, the process proceeds to step S405.
- step S403 the measurement control unit 265 causes the measurement unit 263 to perform measurement in the extended band. Then, the measurement unit 263 performs measurement in the CC and the extension band. Then, the process repeats step S403.
- step S405 the measurement control unit 265 does not cause the measurement unit 263 to perform measurement in the extended band. Then, the measurement part 263 performs measurement in CC. Then, the process repeats step S405.
- the UE 200-1 that uses the frequency band assigned to the operator for communication does not perform measurement in the extended band of the frequency band.
- the execution of the measurement is controlled.
- the measurement-related control is performed so that the UE 200-1 using the frequency band for communication does not perform measurement in the extension band. Instructing UE 200-1 to perform or not to perform the measurement.
- the measurement related control instructs the UE 200-1 to perform measurement even in the extension band of the used frequency band, and does not perform measurement in the extension band of the used frequency band. Including instructing the UE 200-1. That is, the communication control unit 153 performs one of the measurement in the extension band of the used frequency band and the measurement not in the extension band of the used frequency band in the UE 200-1. Instruct. In this case, for example, when the eNodeB 100-1 instructs the UE 200-1 to perform measurement even in the extension band of the used frequency band, the UE 200-1 performs measurement in the extension band of the used frequency band. . Further, when the eNodeB 100-1 instructs the UE 200-1 not to perform measurement in the extension band of the used frequency band, the UE 200-1 does not perform measurement in the extension band of the used frequency band.
- the measurement-related control includes instructing the UE 200-1 not to perform measurement in the extension band of the used frequency band, and also in the extension band of the used frequency band. It may not include instructing the UE 200-1 to perform the measurement.
- the measurement-related control includes instructing the UE 200-1 to perform measurement even in the extension band of the used frequency band, and in the extension band of the used frequency band. It may not include instructing the UE 200-1 not to perform the measurement.
- the measurement control unit 265 performs measurement in the extension band in accordance with the measurement-related control by the eNodeB 100-1 (that is, control related to measurement by the UE in the extension band). Control execution. Then, the measurement control unit 265 controls the execution of the measurement so that the measurement in the extended band is not performed when the UE 200-1 uses the frequency band for communication.
- the eNodeB 100-1 instructs the UE 200-1 to perform the extension band measurement of the used frequency band or not to perform the measurement. Then, in response to an instruction from the eNodeB 100-1, the measurement control unit 265 causes the measurement unit 263 to perform measurement in the extension band of the used frequency band, or measures measurement in the extension band of the used frequency band. The unit 263 is not allowed to do this.
- the eNodeB 100-1 instructs the UE 200-1 to perform measurement in the extension band of the used frequency band, and not to perform measurement in the extension band of the used frequency band.
- the measurement control unit 265 measures the measurement in the extension band of the used frequency band. To the unit 263.
- the measurement control unit 265 performs measurement in the extension band of the used frequency band. Do not let 263 do.
- FIG. 10 is a flowchart illustrating an example of a schematic flow of communication control processing on the eNodeB 100-1 side according to the modification of the first embodiment.
- step S321 the communication control unit 153 instructs the UE 200-1 to perform measurement in the extended band of the used frequency band via the wireless communication unit 120 with a predetermined means. Then, the process repeats step S321.
- step S323 the communication control unit 153 instructs the UE 200-1 via the wireless communication unit 120 not to perform measurement in the extension band of the used frequency band by a predetermined means. Then, the process repeats step S323.
- FIG. 11 is a flowchart illustrating an example of a schematic flow of a communication control process on the UE 200-1 side according to the first modification of the first embodiment.
- step S421 the measurement control unit 265 determines whether the eNodeB 100-1 has instructed the UE 200-1 to perform measurement even in the extended band of the frequency band being used. If the UE 200-1 is instructed by the eNodeB 100-1 to perform measurement even in the extended band of the frequency band being used, the process proceeds to step S423. Otherwise, the process proceeds to step S425.
- step S423 the measurement control unit 265 causes the measurement unit 263 to perform measurement in the extended band of the frequency band being used. Then, the measurement unit 263 performs measurement in the CC and extension band of the frequency band being used. Then, the process repeats step S423.
- step S425 the measurement control unit 265 does not cause the measurement unit 263 to perform measurement in the extended band of the frequency band being used. Then, the measurement part 263 performs the measurement in CC of the used frequency band. Then, the process repeats step S425.
- the modification of the first embodiment has been described above. According to the modification, it is possible to suppress the measurement load by the UE. More specifically, for example, the frequency of handover (inter-cell handover) in the same frequency band is higher than the frequency of handover between different frequency bands. Therefore, the measurement for handover in the same frequency band (ie, used by the UE) rather than the load of measurement for handover between different frequency bands (ie, measurement in the frequency band not used by the UE) Load in the measurement frequency band is larger. Therefore, in particular, by reducing the measurement in the frequency band used by the UE, the measurement load can be more effectively suppressed by the UE.
- a frequency band that is not used may have a bandwidth that is different from the bandwidth of the frequency band that is being used (when the CC and / or the extension band is different). It is considered desirable to have a measurement result of Therefore, as described above, it may be more desirable to omit the measurement in the extension band of the frequency band used by the UE than the measurement in the extension band of the frequency band not used by the UE.
- 1st Embodiment As mentioned above, although 1st Embodiment was described, 1st Embodiment is not limited to the example mentioned above.
- whether or not measurement by the UE in the extended band is executed is determined in units of the cell 10, but the first embodiment is not limited to such an example.
- whether or not measurement by the UE in the extended band is performed may be determined in units of the UE 200-1.
- whether or not the measurement by the UE in the extension band is performed may be determined according to the communication quality of each UE 200-1 in the extension band.
- the UE when the UE performs radio communication in an extension band other than the component carrier (CC) in the frequency band allocated to the operator, the UE is used as long as the extension band is also a band to be used. However, it is conceivable to perform measurement even in the extended band. However, in that case, the UE will make measurements in the CC and extended bands (ie, wider bands). As a result, the measurement load for the UE may increase.
- CC component carrier
- the first embodiment of the present disclosure it is possible to suppress the measurement load by the UE when the allocated frequency band is used effectively (that is, when the extended band is also used). Specifically, in the second embodiment, when the UE 200 is in an idle state, the UE 200 does not perform measurement in the extension band.
- FIG. 12 is a block diagram showing an example of the configuration of the UE 200-2 according to the second embodiment.
- UE 200-2 includes an antenna unit 210, a radio communication unit 220, a storage unit 230, an input unit 240, a display unit 250, and a processing unit 270.
- the measurement control unit 271 of the processing unit 270 will be described.
- the measurement control unit 271 controls the execution of measurement by the UE 200-2.
- the measurement control unit 271 when the UE 200-2 is in an idle state for radio resources, the measurement control unit 271 has a frequency band other than CC (band of a predetermined bandwidth) in the frequency band allocated to the operator. The execution of the measurement is controlled so that the measurement in the extension band is not performed.
- CC band of a predetermined bandwidth
- the measurement control unit 271 causes the measurement unit 263 to perform measurement in the extended band. That is, the measurement control unit 271 causes the measurement unit 263 to perform measurement in the CC and the extended band of the frequency band assigned to the operator.
- the measurement control unit 271 does not cause the measurement unit 263 to perform measurement in the extended band. That is, the measurement control unit 271 causes the measurement unit 263 to perform measurement in the CC in the frequency band assigned to the operator.
- information on the paging channel may be transmitted in CC (band of a predetermined bandwidth) instead of the extension band.
- CC band of a predetermined bandwidth
- FIG. 13 is a flowchart showing an example of a schematic flow of communication control processing on the UE 200-2 side according to the second embodiment.
- step S501 the measurement control unit 265 determines whether the UE 200-2 is in the RRC idle state. If UE 200-2 is in the RRC idle state, the process proceeds to step S507. Otherwise, the process proceeds to step S503.
- step S503 the measurement control unit 265 causes the measurement unit 263 to perform measurement in the CC and the extended band in the frequency band assigned to the operator.
- step S505 the measurement control unit 265 determines whether the UE 200-2 has entered the RRC idle state. If the UE 200-2 has entered the RRC idle state, the process proceeds to step S507. Otherwise, the process proceeds to step S503.
- step S507 the measurement control unit 265 causes the measurement unit 263 to perform measurement at the CC in the frequency band assigned to the operator.
- step S509 the measurement control unit 265 determines whether the UE 200-2 is in an RRC connection state. If the UE 200-2 has entered the RRC connection state, the process proceeds to step S503. Otherwise, the process proceeds to step S507.
- the UE When the UE performs radio communication in the extended band other than the component carrier (CC) in the frequency band allocated to the operator, it is assumed that the measurement in the entire band including the CC and the extended band is performed. The However, when the measurement in the entire band and the report of the measurement are performed, the eNodeB cannot confirm the quality for each of the CC and the extension band. As a result, detailed communication control by the eNodeB can be difficult. For example, it may be difficult to appropriately determine whether or not the UE performs wireless communication in the extended band.
- CC component carrier
- the third embodiment of the present disclosure it is possible to control wireless communication in consideration of communication quality in each of a CC (band of a predetermined bandwidth) and an extension band. Specifically, in the third embodiment, a measurement result in CC (band of a predetermined bandwidth) and a measurement result in an extended band are reported.
- FIG. 14 is a block diagram illustrating an example of the configuration of the eNodeB 100-3 according to the third embodiment.
- the eNodeB 100-1 includes an antenna unit 110, a wireless communication unit 120, a network communication unit 130, a storage unit 140, and a processing unit 160.
- the processing unit 160 will be described here.
- the processing unit 160 provides various functions of the eNodeB 100-3.
- the processing unit 160 includes an information acquisition unit 161 and a communication control unit 163.
- the information acquisition unit 161 acquires the result of measurement by the UE.
- the information acquisition unit 161 acquires the measurement result by the UE 20 in the CC (band of a predetermined bandwidth) among the frequency bands assigned to the operator.
- the UE 20 performs measurement in the CC and reports the measurement result to the eNodeB 100-3. Then, the information acquisition unit 161 acquires the measurement result via the wireless communication unit 120.
- the information acquisition unit 161 acquires a measurement result by the UE 200 in a CC (band of a predetermined bandwidth) and an extension band among the frequency bands assigned to the operator.
- the information acquisition unit 161 includes a first measurement result that is a result of measurement by the UE 200-3 in the CC, and a second measurement result that is a result of the measurement by the UE 200-3 in the extension band. Get each.
- the UE 200-3 performs measurement in the CC and reports the measurement result to the eNodeB 100-3. Also, the UE 200-3 performs measurement in the extended band and reports the measurement result to the eNodeB 100-3.
- the information acquisition unit 161 may acquire measurement-related information related to execution of measurement by the UE in the extended band, similar to the information acquisition unit 151 according to the first embodiment.
- the communication control unit 163 controls wireless communication within the cell 10.
- the communication control unit 163 includes a first measurement result that is a result of measurement by the UE 200-3 in the CC, and a second measurement result that is a result of the measurement by the UE 200-3 in the extension band. Based on the above, the wireless communication in the cell 10 is controlled.
- the communication control unit 163 determines whether to cause the UE 200-3 to perform wireless communication in the extension band based on the second measurement result that is a result of measurement by the UE 200-3 in the extension band.
- Control related to measurement by UE in UE may be performed.
- FIG. 15 is a block diagram showing an example of the configuration of the UE 200-3 according to the third embodiment.
- UE 200-3 includes an antenna unit 210, a wireless communication unit 220, a storage unit 230, an input unit 240, a display unit 250, and a processing unit 280.
- the antenna unit 210, the wireless communication unit 220, the storage unit 230, the input unit 240, the display unit 250, and the band recognition unit 261 and the display control unit 269 included in the processing unit 280 are the same as those in the first embodiment. There is no difference from the third embodiment. Therefore, here, the measurement unit 281, the measurement control unit 283, and the report unit 285 of the processing unit 280 will be described.
- the measurement unit 281 performs measurement in the frequency band assigned to the operator.
- the above measurement is a measurement of the quality of the transmission line. More specifically, for example, the measurement is a measurement of RSRP and / or RSSQ.
- the measurement unit 281 measures RSRP using the control signal. That is, the measurement unit 281 measures RSRP by averaging the received power of the control signal.
- the control signal includes CRS and / or CSI-RS.
- the measurement unit 281 performs the above measurement according to the control by the measurement control unit 283.
- the measurement unit 281 performs measurement in a band specified by the measurement control unit 283.
- the measurement unit 281 performs measurement in CC (band of a predetermined bandwidth).
- the measurement unit 263 performs measurement in the CC and the extension band.
- the measurement unit 281 performs the measurement in the CC and the measurement in the extension band when performing the measurement in the CC and the extension band.
- the measurement unit 281 measures RSRP and / or RSSQ in the CC and RSRP and / or RSSQ in the extension band. As a result, a first measurement result that is a result of measurement by the UE in CC and a second measurement result that is a result of measurement by the UE in the extension band are obtained.
- the first measurement result is a result obtained by measurement over a first period in CC
- the second measurement result is obtained by measurement over a second period in the extension band. It is a result.
- the second period is longer than the first period. That is, the measurement unit 281 performs measurement in the first period in CC, and performs measurement in the second period (longer than the first period) in the extended band.
- the measurement unit 281 measures RSRP and / or RSRQ using a control signal over a first period in CC. In addition, the measurement unit 281 measures RSRP and / or RSRQ using a control signal over a longer second period in the extension band.
- RSRP and / or RSRQ using a control signal over a longer second period in the extension band.
- FIG. 16 is an explanatory diagram for explaining an example of a measurement period in each of the component carrier (CC) and the extension band.
- a control signal eg, CRS and / or CSI-RS
- RSRP and / or RSRQ are measured using a control signal (for example, CRS and / or CSI-RS) over a second period 61 longer than the first period 51.
- Such a measurement period makes it possible to obtain a highly reliable measurement result even for an extended band having a narrower bandwidth than CC (that is, a smaller amount of control signal that can be used for measurement).
- more reliable RSRP and / or RSRQ can be obtained by averaging received power of more control signals (eg, CRS and / or CSI-RS).
- the measurement control unit 283 controls execution of measurement by the UE 200-3.
- the measurement control unit 283 may control the execution of the measurement so that part or all of the measurement in the extended band is not performed. Good.
- the reporting unit 285 reports the measurement result by the UE 200-3 to the eNodeB 100-3.
- the report unit 285 reports the measurement result via the wireless communication unit 220.
- the measurement result includes RSRP and / or RSSQ. That is, the reporting unit 285 reports RSRP and / or RSSQ to the eNodeB 100-1 via the wireless communication unit 220.
- the reporting unit 285 reports the first measurement result that is the result of measurement by the UE in the CC and the second measurement result that is the result of measurement by the UE in the extension band, respectively. .
- condition for reporting the second measurement result is different from the condition for reporting the first measurement result. Therefore, for example, it becomes possible to report the measurement result in CC and the measurement result in the extension band at a more suitable timing.
- the report of the first measurement result is a report triggered by each of one or more types of events.
- the report of the second measurement result is a report triggered by each of at least one type of event including another type of event not included in the one or more types of event.
- the one or more types of events that trigger the reporting of the first measurement result include one or more of the events A1 to A6 defined in Release 8.
- another type of event that triggers the reporting of the second measurement result is that the relationship between the first measurement result and the second measurement result satisfies a predetermined condition.
- the another type of event is that a difference between the first measurement result and the second measurement result satisfies a predetermined condition.
- FIG. 17 is an explanatory diagram for describing a first example of another type of event that triggers reporting of a measurement result (second measurement result) in the extended band.
- RSRP for each of the extension band and CC is shown.
- the another type of event is that the difference 71 obtained by subtracting the RSRP in the CC from the RSRP for the extension band exceeds a predetermined threshold. That is, when the RSRP for the extension band becomes greater than the RSRP in the CC by a predetermined threshold or more, the report unit 285 reports the measurement result (for example, RSRP) in the extension band to the eNodeB 100-3.
- FIG. 18 is an explanatory diagram for describing a second example of another type of event that triggers reporting of a measurement result (second measurement result) in the extended band.
- RSRP for each of the extension band and CC is shown.
- the another type of event is that the difference 73 obtained by subtracting the RSRP for the extension band from the RSRP in the CC exceeds a predetermined threshold. That is, the reporting unit 285 reports the measurement result (for example, RSRP) in the extended band to the eNodeB 100-3 when the RSRP for the extended band becomes smaller than the RSRP in the CC by a predetermined threshold or more.
- the measurement result in the extension band can be reported. That is, the result of the measurement in the extended band can be reported only when a feature different from the result of the measurement in the CC appears in the result of the measurement in the extended band. As a result, for example, it is possible to limit the reporting of the measurement result in the extension band and reduce the reporting load.
- the at least one type of event that triggers the reporting of the second measurement result may include one or more of the events A1 to A6 defined in Release 8.
- the report of the first measurement result and the report of the second measurement result may be reports triggered by at least one same type of event. Then, some or all of the at least one same type of event includes a first threshold for reporting the first measurement result and a second threshold for reporting the second measurement result. And a threshold value.
- the at least one same type of event includes one or more of the events A1 to A6 defined in Release 8. That is, the report of the first measurement result and the report of the second measurement result are reports triggered by one or more events among the events A1 to A6.
- the one or more events are for reporting a first threshold for reporting a first measurement result (a measurement result in CC) and a second measurement result (a measurement result in an extended band). And a second threshold value.
- the report of the first measurement result is a report performed in a first cycle
- the report of the second measurement result is performed in a second cycle different from the first cycle. May be a report.
- the report unit 285 periodically reports measurement results. Then, the reporting unit 285 reports the first measurement result in the first cycle and reports the second measurement result in the second cycle.
- the second period is a period longer than the first period.
- the measurement result in the CC and the measurement result in the extension band at a more suitable timing.
- the second measurement result (measurement result in the extension band) with a longer period than the period of the first measurement result, it is possible to ensure a longer period as the measurement period in the extension band. It becomes possible. As a result, a more reliable measurement result can be reported.
- FIG. 19 is a flowchart illustrating an example of a schematic flow of communication control processing on the eNodeB 100-3 side according to the third embodiment.
- step S601 the information acquisition unit 161 acquires a first measurement result that is a measurement result by the UE 200-3 in the CC or a second measurement result that is a measurement result by the UE 200-3 in the extended band.
- step S603 the communication control unit 163 controls wireless communication in the cell 10 based on the acquired measurement result. Then, the process returns to step S601.
- FIG. 20 is a flowchart showing an example of a schematic flow of the first communication control process on the UE 200-3 side according to the third embodiment.
- the first communication control process is a process related to measurement in CC.
- step S711 the measurement unit 281 performs measurement in the first period in CC.
- step S713 the reporting unit 285 determines whether any event that triggers the reporting of the first measurement result (measurement result in CC) has occurred. If any of the events has occurred, the process proceeds to step S715. Otherwise, the process returns to step S711.
- step S715 the reporting unit 285 reports the first measurement result (measurement result in CC) to the eNodeB 100-3 via the wireless communication unit 220. Then, the process returns to step S711.
- FIG. 21 is a flowchart showing an example of a schematic flow of the second communication control process on the UE 200-3 side according to the third embodiment.
- the second communication control process is a process related to measurement in the extension band.
- step S721 the measurement unit 281 performs measurement in the second period in the extended band.
- step S723 the reporting unit 285 determines whether any event that triggers the reporting of the second measurement result (measurement result in the extended band) has occurred. If any of the events has occurred, the process proceeds to step S725. Otherwise, the process returns to step S721.
- step S725 the reporting unit 285 reports the second measurement result (measurement result in the extended band) to the eNodeB 100-3 via the wireless communication unit 220. Then, the process returns to step S721.
- the UE 200-1 reports the measurement result in the CC and the measurement result in the extension band, or in the band including the CC and the extension band, respectively. Report the measurement results.
- the information acquisition unit 161 acquires information on a report unit of measurement results related to CCs and extended bands (hereinafter referred to as “report unit information”).
- the reporting unit information includes third information corresponding to reporting a measurement result in CC (first measurement result) and a measurement result in extension band (second measurement result), and CC And the fourth information corresponding to reporting the measurement result in the band including the extension band (hereinafter referred to as “integrated measurement result”).
- the reporting unit information is setting information of the eNodeB 100-3.
- the third information is setting information for controlling the UE so as to report the measurement result in CC (first measurement result) and the measurement result in extension band (second measurement result). is there.
- the fourth information is setting information for controlling the UE so as to report a measurement result (integrated measurement result) in a band including the CC and the extension band.
- the setting information is set by an operator of the communication system 1.
- the communication control unit 163 instructs the UE 200-3 on the measurement report unit.
- the communication control unit 163 reports the measurement result in the CC and the measurement result in the extension band, and / or reports the measurement result in the band including the CC and the extension band. To instruct.
- the communication control unit 163 reports either the measurement result in the CC and the measurement result in the extension band, or reports the measurement result in the band including the CC and the extension band.
- the communication control unit 163 performs the measurement result in CC (first measurement result) and the measurement result in extension band ( The UE 200-3 is instructed to report each of the second measurement results.
- the reporting unit information is the fourth information
- the communication control unit 163 reports to UE 200-3 that it reports the measurement result (integrated measurement result) in the band including the CC and the extension band. Instruct.
- the measurement unit 281 performs the measurement in the CC and the measurement in the extension band according to the control by the measurement control unit 283, or the measurement in the band including the CC and the extension band. I do.
- the measurement unit 281 performs the measurement in the CC and the measurement in the extension band
- the measurement result in the CC first measurement result
- the measurement result in the extension band second measurement result
- a measurement result (integrated measurement result) in the band including the CC and the extension band is obtained.
- the measurement control unit 283 controls the execution of measurement according to the control by the eNodeB 100-3.
- the eNodeB 100-3 instructs the UE 200-3 to report the measurement result in CC (first measurement result) and the measurement result in extension band (second measurement result), respectively. To do. Then, the measurement control part 283 controls the measurement part 281 so that the measurement in CC and the measurement in an extended band may be performed, respectively. Further, for example, the eNodeB 100-3 instructs the UE 200-3 to report a measurement result (integrated measurement result) in a band including the CC and the extension band. Then, the measurement control unit 283 controls the measurement unit 281 so as to perform measurement in a band including the CC and the extension band.
- the reporting unit 285 reports the measurement result by the UE 200-3 to the eNodeB 100-3 in accordance with the control by the eNodeB 100-3.
- the eNodeB 100-3 instructs the UE 200-3 to report the measurement result in CC (first measurement result) and the measurement result in extension band (second measurement result), respectively. To do. Then, the report unit 285 reports the first measurement result and the second measurement result to the eNodeB 100-3, respectively. Further, for example, the eNodeB 100-3 instructs the UE 200-3 to report a measurement result (integrated measurement result) in a band including the CC and the extension band. Then, the report unit 285 reports the integrated measurement result to the eNodeB 100-3.
- FIG. 22 is a flowchart illustrating an example of a schematic flow of the first communication control process on the eNodeB 100-3 side according to the modification of the third embodiment.
- the first communication control process is a process related to an instruction of a measurement report unit.
- step S621 the information acquisition unit 161 acquires report unit information (information on the report unit of the measurement result regarding the CC and the extension band).
- the reporting unit information includes third information corresponding to reporting a measurement result in CC (first measurement result) and a measurement result in extension band (second measurement result), and CC and extension. This is any of the fourth information corresponding to reporting the measurement result (integrated measurement result) in the band including the band.
- step S623 the communication control unit 163 determines whether the reporting unit information is the third information. If the reporting unit information is the third information, the process proceeds to step S625. Otherwise (that is, if the reporting unit information is the fourth information), the process proceeds to step S627.
- step S625 the communication control unit 163 reports, via the wireless communication unit 120, the first measurement result that is the measurement result in the CC and the second measurement result that is the measurement result in the extended band, respectively. This is instructed to the UE 200-3 by a predetermined means. Then, the process repeats step S625.
- step S627 the communication control unit 163 instructs the UE 200-3 to report an integrated measurement result that is a result of measurement in a band including the CC and the extended band, via the wireless communication unit 120. Then, the process repeats step S627.
- FIG. 23 is a flowchart illustrating an example of a schematic flow of a second communication control process on the eNodeB 100-3 side according to the modification of the third embodiment.
- the second communication control process is a process when the integrated measurement result is reported from the UE 200-3 to the eNodeB 100-3. Note that the processing when the first measurement result and the second measurement result are reported is as described above with reference to FIG.
- step S641 the information acquisition unit 161 acquires an integrated measurement result that is a result of measurement by the UE 200-3 in a band including the CC and the extension band.
- step S643 the communication control unit 163 controls wireless communication in the cell 10 based on the acquired measurement result. Then, the process returns to step S641.
- FIG. 24 is a flowchart illustrating an example of a schematic flow of a communication control process on the UE 200-3 side according to the modification of the third embodiment.
- step S741 the measurement control unit 283 and / or the report unit 285 report the first measurement result that is the measurement result in the CC and the second measurement result that is the measurement result in the extended band, respectively.
- the process proceeds to steps S710 and S720. Otherwise, the process proceeds to step S760.
- step S710 and S720 a first measurement report process is performed.
- Step S710 is the process described above with reference to FIG. 20, and step S720 is the process described above with reference to FIG.
- step S760 a second measurement report process is performed.
- FIG. 25 is a flowchart illustrating an example of a schematic flow of the second measurement report process on the UE 200-3 side according to the modification of the third embodiment.
- step S761 the measurement unit 281 performs measurement in the third period in the band including the CC and the extension band.
- step S763 the reporting unit 285 determines whether any event that triggers the reporting of the integrated measurement result (the measurement result in the band including the CC and the extended band) has occurred. If any of the events has occurred, the process proceeds to step S765. Otherwise, the process returns to step S761.
- step S765 the reporting unit 285 reports the integrated measurement result (the measurement result in the band including the CC and the extended band) to the eNodeB 100-3 via the wireless communication unit 220. Then, the process returns to step S761.
- the third period is the same as the first period, for example. Also, any one of the above events that triggers the reporting of the integrated measurement result is the same as, for example, any one of the above events that triggers the reporting of the first measurement result.
- the reporting unit can be changed by the control of the eNodeB 100-1. Therefore, for example, it becomes possible to adopt a reporting method more flexibly.
- the UE when the UE performs radio communication in an extension band other than the component carrier (CC) in the frequency band allocated to the operator, the UE is used as long as the extension band is also a band to be used. However, it is conceivable to perform measurement even in the extended band. However, in that case, the UE will make measurements in the CC and extended bands (ie, wider bands). As a result, the measurement load for the UE may increase.
- CC component carrier
- the first embodiment of the present disclosure it is possible to suppress the measurement load by the UE when the allocated frequency band is used effectively (that is, when the extended band is also used). Specifically, in the first embodiment, transmission of the control signal in the extension band is controlled.
- FIG. 26 is a block diagram illustrating an example of the configuration of the eNodeB 100-4 according to the fourth embodiment.
- the eNodeB 100-4 includes an antenna unit 110, a radio communication unit 120, a network communication unit 130, a storage unit 140, and a processing unit 170.
- the processing unit 170 will be described here.
- the processing unit 170 provides various functions of the eNodeB 100-4.
- the processing unit 170 includes an information acquisition unit 171 and a communication control unit 173.
- the information acquisition unit 151 acquires measurement related information related to execution of measurement by the UE in an extension band other than the component carrier (band of a predetermined bandwidth) in the frequency band assigned to the operator.
- the measurement related information is setting information related to transmission of a control signal used for measurement by the UE.
- the control signal includes CRS and / or CSI-RS.
- the measurement related information is setting information indicating a position (radio resource) for transmitting a control signal.
- the measurement related information is information indicating an antenna port that transmits the control signal in the CC and an antenna port that transmits the control signal in the extension band.
- the communication control unit 173 controls wireless communication within the cell 10.
- the communication control unit 173 performs control related to measurement by the UE in the extended band (hereinafter referred to as “measurement related control”) based on the measurement related information.
- the measurement-related control includes control of transmission of the control signal in the extension band (hereinafter referred to as "control signal transmission control"). That is, the communication control unit 173 performs control of transmission of the control signal in the extension band (that is, control signal transmission control). For example, the communication control unit 173 performs control signal transmission control based on the measurement related information.
- control signal transmission control controls the transmission of the control signal so that the density of the control signal transmitted in the extension band is different from the density of the control signal transmitted in CC. Including. More specifically, for example, in the control signal transmission control, the control signal transmission control is performed such that the density of the control signal transmitted in the extension band is lower than the density of the control signal transmitted in the CC. Including controlling transmission.
- control signal transmission control is performed so that the control signal is transmitted in the extended band with a smaller number of antenna ports than the number of antenna ports to which the control signal is transmitted in CC.
- Controlling transmission of the control signal That is, the communication control unit 173 transmits the control signal in the CC with the first number of antenna ports, and transmits the control signal in the extension band with the second number of antenna ports smaller than the first number. In this way, the transmission of the control signal is controlled.
- the communication control unit 173 causes the wireless communication unit 120 to transmit a control signal in this way.
- FIG. 27 is an explanatory diagram for explaining an example of an antenna port that transmits a control signal in each band.
- a 5 MHz CC and two extended bands of 0.5 MHz are shown.
- the control signal is transmitted through four antenna ports of antenna ports 0 to 3.
- the control signal is transmitted only by antenna port 0.
- the control signal is transmitted with a smaller number of antenna ports.
- the communication control unit 173 notifies the UE 200-4 of information indicating the position (radio resource) where the control signal is transmitted.
- the information is information indicating an antenna port that transmits the control signal in the CC and an antenna port that transmits the control signal in the extension band.
- the communication control unit 173 notifies the UE 200-4 of the information using system information. Note that the communication control unit 173 may notify the UE 200-4 of the above information through any signaling (signaling during connection setup, RRC signaling, etc.).
- FIG. 28 is a block diagram showing an example of the configuration of the UE 200-4 according to the fourth embodiment.
- UE 200-4 includes an antenna unit 210, a radio communication unit 220, a storage unit 230, an input unit 240, a display unit 250, and a processing unit 290.
- the antenna unit 210, the wireless communication unit 220, the storage unit 230, the input unit 240, the display unit 250, and the band recognition unit 261 and the display control unit 269 included in the processing unit 290 are the same as those in the first embodiment. There is no difference from the fourth embodiment. Therefore, here, the measurement unit 291, the measurement control unit 293, and the report unit 295 of the processing unit 290 will be described.
- the measurement unit 291 performs measurement in the frequency band assigned to the operator.
- the above measurement is a measurement of the quality of the transmission line. More specifically, for example, the measurement is a measurement of RSRP and / or RSSQ.
- the measurement unit 291 measures RSRP using the control signal. That is, the measurement unit 291 measures RSRP by averaging the received power of the control signal.
- the control signal includes CRS and / or CSI-RS.
- the measurement unit 291 performs the above measurement according to the control by the measurement control unit 293.
- the measurement unit 291 performs measurement using a control signal transmitted with a radio resource specified by the measurement control unit 293.
- the measurement control unit 293 controls execution of measurement by the UE 200-4.
- the density of the control signal transmitted in the extension band is different from the density of the control signal transmitted in the CC. More specifically, for example, the density of the control signal transmitted in the extension band is lower than the density of the control signal transmitted in the CC.
- the measurement control part 293 controls execution of the measurement by UE200-4 so that the measurement in CC may be performed using the said control signal transmitted in CC at least.
- the control signal is transmitted in the extension band by a smaller number of antenna ports than the number of antenna ports to which the control signal is transmitted in CC. Then, the measurement control unit 293 performs measurement in the CC using the control signal transmitted in the CC, and performs measurement in the extension band using the control signal transmitted in the extension band. 4 controls the execution of the measurement. That is, the measurement control unit 293 controls the measurement unit 291 so as to perform such measurement.
- the eNodeB 100-4 notifies the UE 200-4 of information indicating a position (radio resource) at which the control signal is transmitted.
- the information is information indicating an antenna port that transmits the control signal in the CC and an antenna port that transmits the control signal in the extension band.
- the measurement control part 293 acquires the said information via the radio
- the reporting unit 295 reports the measurement result by the UE 200-4 to the eNodeB 100-4.
- the measurement result includes RSRP and / or RSSQ. That is, the report unit 267 reports RSRP and / or RSSQ to the eNodeB 100-4 via the wireless communication unit 220.
- the reporting unit 295 may report the measurement result for each antenna port to the eNodeB 100-4.
- the measurement result for the antenna port that transmits the control signal in the CC and the extension band may be a measurement result (integrated measurement result) in the band including the CC and the extension band, and the measurement result in the CC ( The first measurement result) and the measurement result in the extension band (second measurement result) may be used.
- the reporting unit 295 may report the measurement result in the CC and the measurement result in the extension band to the eNodeB 100-4, respectively.
- the measurement result in CC may be a measurement result for each antenna port, or may be a measurement result for all antenna ports.
- the measurement result in CC may be the measurement result for all antenna ports.
- FIG. 29 is a flowchart illustrating an example of a schematic flow of a first communication control process on the eNodeB 100-4 side according to the fourth embodiment.
- the first communication control process is a process related to transmission of a control signal.
- step S1001 the information acquisition unit 171 acquires setting information (measurement related information) related to transmission of a control signal used for measurement by the UE.
- the setting information is information indicating an antenna port that transmits the control signal in the CC and an antenna port that transmits the control signal in the extension band.
- step S1003 the communication control unit 173 recognizes the antenna port that transmits the control signal in the CC and the antenna port that transmits the control signal in the extension band from the setting information.
- step S1005 the communication control unit 173 causes the wireless communication unit 120 to transmit the control signal through the recognized antenna port in each of the CC and the extension band. Then, the process repeats step S1005.
- FIG. 30 is a flowchart showing an example of a schematic flow of the second communication control process on the eNodeB 100-4 side according to the fourth embodiment.
- the second communication control process is a process related to notification of information indicating a position (radio resource) at which a control signal is transmitted.
- step S1021 the information acquisition unit 171 acquires setting information (measurement related information) related to transmission of a control signal used for measurement by the UE.
- the setting information is information indicating an antenna port that transmits the control signal in the CC and an antenna port that transmits the control signal in the extension band.
- step S1023 the communication control unit 173 recognizes the antenna port that transmits the control signal in the CC and the antenna port that transmits the control signal in the extension band from the setting information.
- step S1025 the communication control unit 173 sets, as information indicating a position (radio resource) at which the control signal is transmitted, an antenna port that transmits the control signal in the CC and an antenna port that transmits the control signal in the extension band. , Notify UE 200-4. Then, the process repeats step S1025.
- FIG. 31 is a flowchart showing an example of a schematic flow of a communication control process on the UE 200-4 side according to the fourth embodiment.
- step S1101 the measurement control unit 293 selects an antenna port that transmits the control signal in the CC and an antenna port that transmits the control signal in the extension band as information indicating a position (radio resource) at which the control signal is transmitted. Get the notification information shown.
- step S1103 the measurement control unit 293 recognizes the antenna port that transmits the control signal in the CC and the antenna port that transmits the control signal in the extension band.
- step S1105 the measurement control unit 293 controls the measurement unit 291 to perform measurement using the control signal transmitted from the recognized antenna port in each of the CC and the extension band. Then, the process repeats step S1105. When an event that triggers reporting of the measurement result occurs, the measurement result is reported.
- control signal used for measurement is not transmitted in the extension band.
- the measurement related information is setting information regarding transmission of a control signal used for measurement by the UE.
- the measurement related information is setting information indicating a position (radio resource) for transmitting a control signal.
- the measurement related information is information indicating a band in which the control signal is transmitted.
- the measurement related information is either information indicating a CC or information indicating a CC and an extended band.
- the measurement-related control is control of transmission of the control signal in the extension band (hereinafter referred to as "control signal transmission control").
- control signal transmission control the communication control unit 173 performs control of transmission of the control signal in the extension band (that is, control signal transmission control).
- control signal transmission control the communication control unit 173 performs control signal transmission control based on the measurement related information.
- control signal transmission control is performed so that the density of the control signal transmitted in the extension band is lower than the density of the control signal transmitted in the CC. Including controlling the transmission of.
- control signal transmission control includes controlling the transmission of the control signal so that the control signal is not transmitted in the extension band. That is, the communication control unit 173 controls transmission of the control signal so that the control signal is transmitted in the CC and the control signal is not transmitted in the extension band. For example, the communication control unit 173 causes the wireless communication unit 120 to transmit a control signal in this way.
- ⁇ Measurement in the extended band is not performed by such control of transmission of the control signal.
- an extension band is also used, it is possible to suppress a measurement load by the UE. Further, for example, overhead due to a control signal used for measurement can be suppressed.
- the communication control unit 173 notifies the UE 200-4 of information indicating a band in which the control signal is transmitted.
- the information is either information indicating a CC or information indicating a CC and an extended band.
- the communication control unit 173 notifies the UE 200-4 of the information using system information. Note that the communication control unit 173 may notify the UE 200-4 of the above information through any signaling (signaling during connection setup, RRC signaling, etc.).
- the measurement unit 291 performs the measurement according to the control by the measurement control unit 293.
- the measurement unit 291 performs measurement in a band specified by the measurement control unit 293. Specifically, the measurement unit 291 performs measurement in CC, or performs measurement in CC and an extended band.
- the density of the control signal transmitted in the extension band is lower than the density of the control signal transmitted in the CC.
- the measurement control part 293 controls execution of the measurement by UE200-4 so that the measurement in CC may be performed using the said control signal transmitted in CC at least.
- the control signal is not transmitted in the extension band so that the control signal is not transmitted in the extension band.
- the measurement control unit 293 performs measurement in the CC using the control signal transmitted in the CC, and controls the execution of the measurement by the UE 200-4 so as not to perform the measurement in the extension band. That is, the measurement control unit 293 controls the measurement unit 291 so as to perform such measurement.
- the eNodeB 100-4 notifies the UE 200-4 of information indicating a band in which the control signal is transmitted.
- the information is information indicating a CC or information indicating a CC and an extension band.
- the measurement control part 293 acquires the said information via the radio
- the report unit 295 reports the measurement result in the CC.
- the measurement result in the CC and the extension band is reported.
- a measurement result in CC first measurement result
- a measurement result in extension band second measurement result
- measurement in a band including CC and extension band Results integrated measurement results
- FIG. 32 is a flowchart illustrating an example of a schematic flow of the first communication control process on the eNodeB 100-4 side according to the modification of the fourth embodiment.
- the first communication control process is a process related to transmission of a control signal.
- step S1041 the information acquisition unit 171 acquires setting information (measurement related information) related to transmission of a control signal used for measurement by the UE.
- the setting information is information indicating a band in which the control signal is transmitted.
- the measurement related information is either information indicating a CC or information indicating a CC and an extended band.
- step S1043 the communication control unit 173 determines whether the measurement related information is information indicating a CC and an extended band. If the measurement related information is information indicating a CC and an extended band, the process proceeds to step S1045. Otherwise, the process proceeds to step S1047.
- step S1045 the communication control unit 173 causes the wireless communication unit 120 to transmit the control signal in the CC and the extension band. Then, the process repeats step S1045.
- step S1047 the communication control unit 173 causes the wireless communication unit 120 to transmit the control signal in the CC. Note that the communication control unit 173 does not cause the wireless communication unit 120 to transmit the control signal in the extension band. Then, the process repeats step S1047.
- FIG. 33 is a flowchart illustrating an example of a schematic flow of the second communication control process on the eNodeB 100-4 side according to the modification of the fourth embodiment.
- the second communication control process is a process related to notification of information indicating a band in which a control signal is transmitted.
- step S1061 the information acquisition unit 171 acquires setting information (measurement related information) related to transmission of a control signal used for measurement by the UE.
- the setting information is information indicating a band in which the control signal is transmitted.
- the measurement related information is either information indicating a CC or information indicating a CC and an extended band.
- step S1063 the communication control unit 173 determines whether the measurement related information is information indicating a CC and an extended band. If the measurement related information is information indicating a CC and an extended band, the process proceeds to step S1065. Otherwise, the process proceeds to step S1067.
- step S1065 the communication control unit 173 notifies the information indicating the CC and the extended band as information indicating the band in which the control signal is transmitted by a predetermined unit. Then, the process repeats step S1065.
- step S1067 the communication control unit 173 notifies information indicating the CC by a predetermined means as information indicating the band in which the control signal is transmitted. Then, the process repeats step S1067.
- FIG. 34 is a flowchart illustrating an example of a schematic flow of a communication control process on the UE 200-4 side according to the modification of the fourth embodiment.
- step S1121 the measurement control unit 293 acquires information indicating a band in which the control signal is transmitted.
- the information is information indicating a CC or information indicating a CC and an extension band.
- step S1123 the measurement control unit 293 determines whether the band in which the control signal is transmitted is the CC and the extension band. If the band in which the control signal is transmitted is CC and the extension band, the process proceeds to step S1125. Otherwise, the process proceeds to step S1127.
- step S1125 the measurement control unit 293 controls the measurement unit 291 to perform measurement in the CC and the extended band. Then, the process repeats step S1125.
- step S1127 the measurement control unit 293 controls the measurement unit 291 so as to perform measurement in CC. Then, the process repeats step S1127.
- 4th Embodiment As mentioned above, although 4th Embodiment was described, 4th Embodiment is not limited to the example mentioned above.
- the density of the control signal transmitted in the extension band is different from the density of the control signal transmitted in the CC has been described.
- the example in which the control signal is transmitted in the extension band using a smaller number of antenna ports than the number of antenna ports to which the control signal is transmitted in the CC has been described. It is not limited to examples.
- the density of the control signal transmitted through the same antenna port may be lower in the extension band than in the CC.
- the density may be a density in the frequency direction, a density in the time direction, or a density in the frequency direction and the time direction.
- the fourth embodiment is not limited to such an example.
- the transmission of the control signal may be controlled such that the density of the control signal transmitted in the extension band is higher than the density of the control signal transmitted in the CC.
- the number of control signals in the extension band with a narrower bandwidth can be increased, so that a more reliable measurement result can be obtained in a shorter time.
- the eNodeB 100 may be realized as any type of eNodeB such as a macro eNodeB or a small eNodeB.
- a small eNodeB may be an eNodeB that covers a smaller cell than a macro cell, such as a pico eNodeB, a micro eNodeB, or a home (femto) eNodeB.
- the eNodeB 100 may include a main body (also referred to as a base station apparatus) that controls radio communication and one or more RRHs (Remote Radio Heads) that are arranged at locations different from the main body.
- RRHs Remote Radio Heads
- various types of terminals to be described later may operate as the eNodeB 100 by temporarily or semi-permanently executing the base station function.
- the UE 200 is realized as a mobile terminal such as a smartphone, a tablet PC (Personal Computer), a notebook PC, a portable game terminal, a portable / dongle type mobile router or a digital camera, or an in-vehicle terminal such as a car navigation device. May be.
- the UE 200 may be realized as a terminal (also referred to as an MTC (Machine Type Communication) terminal) that performs M2M (Machine To Machine) communication.
- MTC Machine Type Communication
- M2M Machine To Machine
- at least some components of the UE 200 may be realized as a module (for example, an integrated circuit module configured by one die) mounted on these terminals.
- FIG. 35 is a block diagram illustrating a first example of a schematic configuration of an eNodeB to which the technology according to the present disclosure may be applied.
- the eNodeB 800 includes one or more antennas 810 and a base station apparatus 820. Each antenna 810 and the base station apparatus 820 can be connected to each other via an RF cable.
- Each of the antennas 810 has a single or a plurality of antenna elements (for example, a plurality of antenna elements constituting a MIMO antenna), and is used for transmission and reception of radio signals by the base station apparatus 820.
- the eNodeB 800 includes a plurality of antennas 810 as illustrated in FIG. 35, and the plurality of antennas 810 may correspond to a plurality of frequency bands used by the eNodeB 800, for example. Note that although FIG. 35 illustrates an example in which the eNodeB 800 includes a plurality of antennas 810, the eNodeB 800 may include a single antenna 810.
- the base station apparatus 820 includes a controller 821, a memory 822, a network interface 823, and a wireless communication interface 825.
- the controller 821 may be a CPU or a DSP, for example, and operates various functions of the upper layer of the base station apparatus 820. For example, the controller 821 generates a data packet from the data in the signal processed by the wireless communication interface 825, and transfers the generated packet via the network interface 823. The controller 821 may generate a bundled packet by bundling data from a plurality of baseband processors, and may transfer the generated bundled packet. In addition, the controller 821 is a logic that executes control such as radio resource control, radio bearer control, mobility management, inflow control, or scheduling. May have a typical function. Further, the control may be executed in cooperation with a peripheral eNodeB or a core network node.
- the memory 822 includes RAM and ROM, and stores programs executed by the controller 821 and various control data (for example, terminal list, transmission power data, scheduling data, and the like).
- the network interface 823 is a communication interface for connecting the base station device 820 to the core network 824.
- the controller 821 may communicate with the core network node or other eNodeB via the network interface 823.
- the eNodeB 800 and the core network node or another eNodeB may be connected to each other by a logical interface (for example, an S1 interface or an X2 interface).
- the network interface 823 may be a wired communication interface or a wireless communication interface for wireless backhaul.
- the network interface 823 may use a frequency band higher than the frequency band used by the wireless communication interface 825 for wireless communication.
- the wireless communication interface 825 supports any cellular communication scheme such as LTE (Long Term Evolution) or LTE-Advanced, and provides a wireless connection to a terminal located in the cell of the eNodeB 800 via the antenna 810.
- the wireless communication interface 825 may typically include a baseband (BB) processor 826, an RF circuit 827, and the like.
- the BB processor 826 may perform, for example, encoding / decoding, modulation / demodulation, and multiplexing / demultiplexing, and each layer (for example, L1, MAC (Medium Access Control), RLC (Radio Link Control), and PDCP).
- Various signal processing of Packet Data Convergence Protocol
- Packet Data Convergence Protocol is executed.
- the BB processor 826 may have some or all of the logical functions described above instead of the controller 821.
- the BB processor 826 may be a module that includes a memory that stores a communication control program, a processor that executes the program, and related circuits. The function of the BB processor 826 may be changed by updating the program. Good.
- the module may be a card or a blade inserted into a slot of the base station apparatus 820, or a chip mounted on the card or the blade.
- the RF circuit 827 may include a mixer, a filter, an amplifier, and the like, and transmits and receives a radio signal via the antenna 810.
- the wireless communication interface 825 includes a plurality of BB processors 826 as shown in FIG. 35, and the plurality of BB processors 826 may respectively correspond to a plurality of frequency bands used by the eNodeB 800, for example. Further, the wireless communication interface 825 includes a plurality of RF circuits 827 as shown in FIG. 35, and the plurality of RF circuits 827 may respectively correspond to a plurality of antenna elements, for example.
- FIG. 35 shows an example in which the wireless communication interface 825 includes a plurality of BB processors 826 and a plurality of RF circuits 827. However, the wireless communication interface 825 includes a single BB processor 826 or a single RF circuit 827. But you can.
- the information acquisition unit 151 and the communication control unit 153 described with reference to FIG. 6 may be implemented in the wireless communication interface 825. Alternatively, at least some of these components may be implemented in the controller 821. As an example, the eNodeB 800 includes a part of the wireless communication interface 825 (for example, the BB processor 826) and / or a module including the controller 821, and the information acquisition unit 151 and the communication control unit 153 are mounted in the module. May be.
- the module executes a program for causing the processor to function as the information acquisition unit 151 and the communication control unit 153 (in other words, a program for causing the processor to execute the operations of the information acquisition unit 151 and the communication control unit 153). You may memorize
- a program for causing a processor to function as the information acquisition unit 151 and the communication control unit 153 is installed in the eNodeB 800, and the wireless communication interface 825 (for example, the BB processor 826) and / or the controller 821 executes the program. May be.
- the eNodeB 800, the base station device 820, or the module may be provided as a device including the information acquisition unit 151 and the communication control unit 153, and the processor functions as the information acquisition unit 151 and the communication control unit 153.
- a program may be provided.
- a readable storage medium storing the program may be provided.
- the wireless communication unit 120 described with reference to FIG. 6 may be implemented in the wireless communication interface 825 (for example, the RF circuit 827).
- the antenna unit 110 described with reference to FIG. 6 may be mounted on the antenna 810.
- the network communication unit 130 described with reference to FIG. 6 may be implemented in the controller 821 and / or the network interface 823.
- FIG. 36 is a block diagram illustrating a second example of a schematic configuration of an eNodeB to which the technology according to the present disclosure may be applied.
- the eNodeB 830 includes one or more antennas 840, a base station apparatus 850, and an RRH 860. Each antenna 840 and RRH 860 may be connected to each other via an RF cable. Base station apparatus 850 and RRH 860 can be connected to each other via a high-speed line such as an optical fiber cable.
- Each of the antennas 840 has a single or a plurality of antenna elements (for example, a plurality of antenna elements constituting a MIMO antenna), and is used for transmission / reception of radio signals by the RRH 860.
- the eNodeB 830 includes a plurality of antennas 840 as illustrated in FIG. 36, and the plurality of antennas 840 may respectively correspond to a plurality of frequency bands used by the eNodeB 830, for example.
- 36 illustrates an example in which the eNodeB 830 includes a plurality of antennas 840, but the eNodeB 830 may include a single antenna 840.
- the base station device 850 includes a controller 851, a memory 852, a network interface 853, a wireless communication interface 855, and a connection interface 857.
- the controller 851, the memory 852, and the network interface 853 are the same as the controller 821, the memory 822, and the network interface 823 described with reference to FIG.
- the wireless communication interface 855 supports a cellular communication method such as LTE or LTE-Advanced, and provides a wireless connection to a terminal located in a sector corresponding to the RRH 860 via the RRH 860 and the antenna 840.
- the wireless communication interface 855 may typically include a BB processor 856 and the like.
- the BB processor 856 is the same as the BB processor 826 described with reference to FIG. 35 except that the BB processor 856 is connected to the RF circuit 864 of the RRH 860 via the connection interface 857.
- the wireless communication interface 855 includes a plurality of BB processors 856 as shown in FIG.
- the plurality of BB processors 856 may correspond to a plurality of frequency bands used by the eNodeB 830, for example.
- 36 illustrates an example in which the wireless communication interface 855 includes a plurality of BB processors 856, the wireless communication interface 855 may include a single BB processor 856.
- connection interface 857 is an interface for connecting the base station device 850 (wireless communication interface 855) to the RRH 860.
- the connection interface 857 may be a communication module for communication on the high-speed line that connects the base station apparatus 850 (wireless communication interface 855) and the RRH 860.
- the RRH 860 includes a connection interface 861 and a wireless communication interface 863.
- connection interface 861 is an interface for connecting the RRH 860 (wireless communication interface 863) to the base station device 850.
- the connection interface 861 may be a communication module for communication on the high-speed line.
- the wireless communication interface 863 transmits and receives wireless signals via the antenna 840.
- the wireless communication interface 863 may typically include an RF circuit 864 and the like.
- the RF circuit 864 may include a mixer, a filter, an amplifier, and the like, and transmits and receives wireless signals via the antenna 840.
- the wireless communication interface 863 includes a plurality of RF circuits 864 as shown in FIG. 36, and the plurality of RF circuits 864 may correspond to, for example, a plurality of antenna elements, respectively.
- 36 illustrates an example in which the wireless communication interface 863 includes a plurality of RF circuits 864, the wireless communication interface 863 may include a single RF circuit 864.
- the information acquisition unit 151 and the communication control unit 153 described with reference to FIG. 6 may be implemented in the wireless communication interface 855 and / or the wireless communication interface 863.
- the eNodeB 830 illustrated in FIG. Alternatively, at least some of these components may be implemented in the controller 851.
- the eNodeB 830 includes a part of the wireless communication interface 855 (for example, the BB processor 856) or a module including the controller 851, and the information acquisition unit 151 and the communication control unit 153 are mounted in the module. May be.
- the module executes a program for causing the processor to function as the information acquisition unit 151 and the communication control unit 153 (in other words, a program for causing the processor to execute the operations of the information acquisition unit 151 and the communication control unit 153). You may memorize
- a program for causing a processor to function as the information acquisition unit 151 and the communication control unit 153 is installed in the eNodeB 830, and the wireless communication interface 855 (for example, the BB processor 856) and / or the controller 851 executes the program. May be.
- the eNodeB 830, the base station device 850, or the module may be provided as a device including the information acquisition unit 151 and the communication control unit 153, and the processor functions as the information acquisition unit 151 and the communication control unit 153.
- a program may be provided.
- a readable storage medium storing the program may be provided.
- the wireless communication unit 120 described with reference to FIG. 6 may be implemented in the wireless communication interface 863 (for example, the RF circuit 864). Further, the antenna unit 110 described with reference to FIG. 6 may be mounted on the antenna 840. The network communication unit 130 described with reference to FIG. 6 may be implemented in the controller 851 and / or the network interface 853.
- FIG. 37 is a block diagram illustrating an example of a schematic configuration of a smartphone 900 to which the technology according to the present disclosure may be applied.
- the smartphone 900 includes a processor 901, a memory 902, a storage 903, an external connection interface 904, a camera 906, a sensor 907, a microphone 908, an input device 909, a display device 910, a speaker 911, a wireless communication interface 912, one or more antenna switches 915.
- One or more antennas 916, a bus 917, a battery 918 and an auxiliary controller 919 are provided.
- the processor 901 may be, for example, a CPU or a SoC (System on Chip), and controls the functions of the application layer and other layers of the smartphone 900.
- the memory 902 includes a RAM and a ROM, and stores programs executed by the processor 901 and data.
- the storage 903 can include a storage medium such as a semiconductor memory or a hard disk.
- the external connection interface 904 is an interface for connecting an external device such as a memory card or a USB (Universal Serial Bus) device to the smartphone 900.
- the camera 906 includes, for example, an image sensor such as a CCD (Charge Coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor), and generates a captured image.
- the sensor 907 may include a sensor group such as a positioning sensor, a gyro sensor, a geomagnetic sensor, and an acceleration sensor.
- the microphone 908 converts sound input to the smartphone 900 into an audio signal.
- the input device 909 includes, for example, a touch sensor that detects a touch on the screen of the display device 910, a keypad, a keyboard, a button, or a switch, and receives an operation or information input from a user.
- the display device 910 has a screen such as a liquid crystal display (LCD) or an organic light emitting diode (OLED) display, and displays an output image of the smartphone 900.
- the speaker 911 converts an audio signal output from the smartphone 900 into audio.
- the wireless communication interface 912 supports any cellular communication method such as LTE or LTE-Advanced, and performs wireless communication.
- the wireless communication interface 912 may typically include a BB processor 913, an RF circuit 914, and the like.
- the BB processor 913 may perform, for example, encoding / decoding, modulation / demodulation, and multiplexing / demultiplexing, and performs various signal processing for wireless communication.
- the RF circuit 914 may include a mixer, a filter, an amplifier, and the like, and transmits and receives radio signals via the antenna 916.
- the wireless communication interface 912 may be a one-chip module in which the BB processor 913 and the RF circuit 914 are integrated.
- the wireless communication interface 912 may include a plurality of BB processors 913 and a plurality of RF circuits 914 as illustrated in FIG. FIG. 37 shows an example in which the wireless communication interface 912 includes a plurality of BB processors 913 and a plurality of RF circuits 914. However, the wireless communication interface 912 includes a single BB processor 913 or a single RF circuit 914. But you can.
- the wireless communication interface 912 may support other types of wireless communication methods such as a short-range wireless communication method, a proximity wireless communication method, or a wireless LAN (Local Area Network) method in addition to the cellular communication method.
- a BB processor 913 and an RF circuit 914 for each wireless communication method may be included.
- Each of the antenna switches 915 switches the connection destination of the antenna 916 among a plurality of circuits (for example, circuits for different wireless communication systems) included in the wireless communication interface 912.
- Each of the antennas 916 includes a single or a plurality of antenna elements (for example, a plurality of antenna elements constituting a MIMO antenna), and is used for transmission / reception of a radio signal by the radio communication interface 912.
- the smartphone 900 may include a plurality of antennas 916 as illustrated in FIG. Note that although FIG. 37 illustrates an example in which the smartphone 900 includes a plurality of antennas 916, the smartphone 900 may include a single antenna 916.
- the smartphone 900 may include an antenna 916 for each wireless communication method.
- the antenna switch 915 may be omitted from the configuration of the smartphone 900.
- the bus 917 connects the processor 901, the memory 902, the storage 903, the external connection interface 904, the camera 906, the sensor 907, the microphone 908, the input device 909, the display device 910, the speaker 911, the wireless communication interface 912, and the auxiliary controller 919 to each other.
- the battery 918 supplies power to each block of the smartphone 900 illustrated in FIG. 37 via a power supply line partially illustrated by a broken line in the drawing.
- the auxiliary controller 919 operates the minimum necessary functions of the smartphone 900 in the sleep mode.
- one or more components may be implemented in the wireless communication interface 912.
- the wireless communication interface 912 may be implemented in the smartphone 900.
- the smartphone 900 includes a module including a part (for example, the BB processor 913) or the whole of the wireless communication interface 912, the processor 901, and / or the auxiliary controller 919, and the one or more components in the module. May be implemented.
- the module stores a program for causing the processor to function as the one or more components (in other words, a program for causing the processor to execute the operation of the one or more components).
- the program may be executed.
- a program for causing a processor to function as the one or more components is installed in the smartphone 900, and the wireless communication interface 912 (eg, the BB processor 913), the processor 901, and / or the auxiliary controller 919 is The program may be executed.
- the smartphone 900 or the module may be provided as a device including the one or more components, and a program for causing a processor to function as the one or more components may be provided.
- a readable storage medium storing the program may be provided.
- one or more components included in the processing unit 270 described with reference to FIG. 12 for example, the band recognition unit 261, the measurement unit 263, the measurement control unit 271 and / or the report unit 267), One or more components included in the processing unit 280 described with reference to FIG. 15 (for example, the band recognition unit 261, the measurement unit 281, the measurement control unit 283, and / or the report unit 285), and FIG.
- One or more components included in the processing unit 290 described above are also included in the processing unit 260. The same as the above components.
- the wireless communication unit 220 described with reference to FIG. 7 may be implemented in the wireless communication interface 912 (for example, the RF circuit 914).
- the antenna unit 210 may be mounted on the antenna 916.
- FIG. 38 is a block diagram illustrating an example of a schematic configuration of a car navigation device 920 to which the technology according to the present disclosure can be applied.
- the car navigation apparatus 920 includes a processor 921, a memory 922, a GPS (Global Positioning System) module 924, a sensor 925, a data interface 926, a content player 927, a storage medium interface 928, an input device 929, a display device 930, a speaker 931, and wireless communication.
- the interface 933 includes one or more antenna switches 936, one or more antennas 937, and a battery 938.
- the processor 921 may be a CPU or SoC, for example, and controls the navigation function and other functions of the car navigation device 920.
- the memory 922 includes RAM and ROM, and stores programs and data executed by the processor 921.
- the GPS module 924 measures the position (for example, latitude, longitude, and altitude) of the car navigation device 920 using GPS signals received from GPS satellites.
- the sensor 925 may include a sensor group such as a gyro sensor, a geomagnetic sensor, and an atmospheric pressure sensor.
- the data interface 926 is connected to the in-vehicle network 941 through a terminal (not shown), for example, and acquires data generated on the vehicle side such as vehicle speed data.
- the content player 927 reproduces content stored in a storage medium (for example, CD or DVD) inserted into the storage medium interface 928.
- the input device 929 includes, for example, a touch sensor, a button, or a switch that detects a touch on the screen of the display device 930, and receives an operation or information input from the user.
- the display device 930 has a screen such as an LCD or an OLED display, and displays a navigation function or an image of content to be reproduced.
- the speaker 931 outputs the navigation function or the audio of the content to be played back.
- the wireless communication interface 933 supports any cellular communication method such as LTE or LTE-Advanced, and performs wireless communication.
- the wireless communication interface 933 may typically include a BB processor 934, an RF circuit 935, and the like.
- the BB processor 934 may perform, for example, encoding / decoding, modulation / demodulation, and multiplexing / demultiplexing, and performs various signal processing for wireless communication.
- the RF circuit 935 may include a mixer, a filter, an amplifier, and the like, and transmits and receives a radio signal via the antenna 937.
- the wireless communication interface 933 may be a one-chip module in which the BB processor 934 and the RF circuit 935 are integrated.
- the wireless communication interface 933 may include a plurality of BB processors 934 and a plurality of RF circuits 935 as shown in FIG. 38 shows an example in which the wireless communication interface 933 includes a plurality of BB processors 934 and a plurality of RF circuits 935, the wireless communication interface 933 includes a single BB processor 934 or a single RF circuit 935. But you can.
- the wireless communication interface 933 may support other types of wireless communication methods such as a short-range wireless communication method, a proximity wireless communication method, or a wireless LAN method in addition to the cellular communication method.
- a BB processor 934 and an RF circuit 935 may be included for each communication method.
- Each of the antenna switches 936 switches the connection destination of the antenna 937 among a plurality of circuits included in the wireless communication interface 933 (for example, circuits for different wireless communication systems).
- Each of the antennas 937 has a single or a plurality of antenna elements (for example, a plurality of antenna elements constituting a MIMO antenna), and is used for transmission / reception of a radio signal by the radio communication interface 933.
- the car navigation device 920 may include a plurality of antennas 937 as shown in FIG. 38 shows an example in which the car navigation device 920 has a plurality of antennas 937, the car navigation device 920 may have a single antenna 937.
- the car navigation device 920 may include an antenna 937 for each wireless communication method.
- the antenna switch 936 may be omitted from the configuration of the car navigation device 920.
- the battery 938 supplies power to each block of the car navigation device 920 shown in FIG. 38 via a power supply line partially shown by a broken line in the drawing. Further, the battery 938 stores electric power supplied from the vehicle side.
- the car navigation device 920 shown in FIG. 38 one or more components (for example, the band recognition unit 261, the measurement unit 263, the measurement control unit 265, and / or the components included in the processing unit 260 described with reference to FIG. 7).
- the reporting unit 267) may be implemented in the wireless communication interface 933.
- at least some of these components may be implemented in the processor 921.
- the car navigation apparatus 920 includes a module including a part (for example, the BB processor 934) or the whole of the wireless communication interface 933 and / or the processor 921, and the one or more components are mounted in the module. May be.
- the module stores a program for causing the processor to function as the one or more components (in other words, a program for causing the processor to execute the operation of the one or more components).
- the program may be executed.
- a program for causing a processor to function as the one or more components is installed in the car navigation device 920, and the wireless communication interface 933 (eg, the BB processor 934) and / or the processor 921 executes the program. May be.
- the car navigation apparatus 920 or the module may be provided as an apparatus including the one or more components, and a program for causing a processor to function as the one or more components may be provided. Good.
- a readable storage medium storing the program may be provided.
- one or more components included in the processing unit 270 described with reference to FIG. 12 for example, the band recognition unit 261, the measurement unit 263, the measurement control unit 271 and / or the report unit 267), One or more components included in the processing unit 280 described with reference to FIG. 15 (for example, the band recognition unit 261, the measurement unit 281, the measurement control unit 283, and / or the report unit 285), and FIG.
- One or more components included in the processing unit 290 described above are also included in the processing unit 260. The same as the above components.
- the wireless communication unit 220 described with reference to FIG. 7 may be implemented in the wireless communication interface 933 (for example, the RF circuit 935).
- the antenna unit 210 may be mounted on the antenna 937.
- the technology according to the present disclosure may be realized as an in-vehicle system (or vehicle) 940 including one or more blocks of the car navigation device 920 described above, an in-vehicle network 941, and a vehicle side module 942. That is, the in-vehicle system (or vehicle) 940 may be provided as a device including the one or more components included in the processing unit 260 (or the processing unit 270, the processing unit 280, or the processing unit 290).
- the vehicle-side module 942 generates vehicle-side data such as vehicle speed, engine speed, or failure information, and outputs the generated data to the in-vehicle network 941.
- the measurement related information is information regarding whether or not the UE performs measurement in the extension band.
- the measurement related control includes control of measurement execution by the UE in the extension band. Specifically, for example, the measurement-related control includes instructing the UE 200-1 to perform measurement in the extension band or not to perform measurement.
- the UE 200 can omit the measurement in the extension band. Therefore, when the allocated frequency band is effectively used (that is, when the extension band is also used), it is possible to suppress the measurement load by the UE 200.
- the measurement-related control performs measurement in the extended band so that the UE 200 using the frequency band for communication does not perform measurement in the extended band. Instructing UE 200 to do or not.
- the frequency of handover (inter-cell handover) in the same frequency band is higher than the frequency of handover between different frequency bands. Therefore, the measurement for handover in the same frequency band (ie, used by the UE) rather than the load of measurement for handover between different frequency bands (ie, measurement in the frequency band not used by the UE) Load in the measurement frequency band is larger. Therefore, in particular, by reducing the measurement in the frequency band used by the UE, the measurement load can be more effectively suppressed by the UE.
- a frequency band that is not used may have a bandwidth that is different from the bandwidth of the frequency band that is being used (when the CC and / or the extension band is different). It is considered desirable to have a measurement result of Therefore, as described above, it may be more desirable to omit the measurement in the extension band of the frequency band used by the UE than the measurement in the extension band of the frequency band not used by the UE.
- a CC band of a predetermined bandwidth
- the execution of the measurement is controlled so that the measurement in the extension band other than () is not performed.
- the allocated frequency band is used effectively (that is, when the extended band is also used). More specifically, for example, particularly when the UE is in an RRC idle state, there is a desire to reduce the power consumption of the UE as much as possible. Therefore, by omitting the measurement in the RRC idle state in this way, the measurement load of the UE in the RRC idle state is suppressed, and as a result, the power consumption is suppressed.
- information on the paging channel may be transmitted in CC (band of a predetermined bandwidth) instead of the extension band. In this case, since the quality in the CC is more important than the quality in the extended band, it is possible to reduce useless measurement by omitting the measurement in the RRC idle state.
- the first measurement result is a result obtained by measurement over a first period in CC
- the second measurement result is a result obtained by measurement over a second period in the extension band.
- the second period is longer than the first period.
- Such a measurement period makes it possible to obtain a highly reliable measurement result even for an extended band having a narrower bandwidth than CC (that is, a smaller amount of control signal that can be used for measurement).
- more reliable RSRP and / or RSRQ can be obtained by averaging received power of more control signals (eg, CRS and / or CSI-RS).
- condition for reporting the second measurement result is different from the condition for reporting the first measurement result.
- the said measurement relevant information is the setting information regarding transmission of the control signal used for the measurement by UE.
- the measurement related control includes control of transmission of the control signal in the extension band (that is, control signal transmission control).
- control signal transmission control includes controlling the transmission of the control signal such that the density of the control signal transmitted in the extension band is different from the density of the control signal transmitted in the CC. More specifically, for example, in the control signal transmission control, the control signal transmission control is performed such that the density of the control signal transmitted in the extension band is lower than the density of the control signal transmitted in the CC. Including controlling transmission.
- control signal transmission control is performed so that the control signal is transmitted in the extension band with a smaller number of antenna ports than the number of antenna ports to which the control signal is transmitted in CC. Including controlling transmission.
- control signal transmission control includes controlling the transmission of the control signal so that the control signal is not transmitted in the extension band.
- ⁇ Measurement in the extended band is not performed by such control of transmission of the control signal.
- an extension band is also used, it is possible to suppress a measurement load by the UE. Further, for example, overhead due to a control signal used for measurement can be suppressed.
- the communication system is a system that complies with LTE, LTE-A, or a communication standard equivalent thereto
- the present disclosure is not limited to such an example.
- the communication system may be a system that complies with another communication standard.
- the communication system includes an eNodeB as an example of a base station (or access point) and includes an UE as an example of a terminal device, the present disclosure is not limited to such an example.
- the communication system may include another type of base station (or access point) and / or another type of terminal device.
- processing steps in the communication control processing of this specification do not necessarily have to be executed in time series in the order described in the flowchart.
- the processing steps in the communication control process may be executed in an order different from the order described in the flowchart, or may be executed in parallel.
- a processor for example, a CPU, a DSP, or the like
- a device for example, a communication control device and / or a terminal device
- a computer program for functioning in other words, a computer program for causing the processor to execute the operation of the components of the device.
- a storage medium storing the computer program may also be provided.
- An apparatus for example, a finished product or a module for a finished product (a component, a processing circuit, a chip, or the like)
- a memory that stores the computer program and one or more processors that can execute the computer program May also be provided.
- a method including the operation of the components of the device for example, an information acquisition unit and a communication control unit
- a method including the operation of the components of the device for example, an information acquisition unit and a communication control unit
- a communication control device comprising: (2) The measurement related information is information related to presence / absence of measurement by the terminal device in the extended band, The control related to the measurement by the terminal device includes control of execution of the measurement by the terminal device in the extension band, The communication control device according to (1). (3) The communication control device according to (2), wherein the control of execution of measurement by the terminal device includes instructing the terminal device to perform measurement or not perform measurement in the extension band.
- the control of the execution of the measurement by the terminal device is to perform the measurement in the extended band or not to perform the measurement so that the terminal device using the frequency band for communication does not perform the measurement in the extended band.
- the communication control device according to (3) including instructing a terminal device.
- the acquisition unit acquires a first measurement result that is a result of measurement by the terminal device in the band of the predetermined bandwidth and a second measurement result that is a result of measurement by the terminal device in the extension band, respectively.
- the communication control device according to any one of (1) to (4).
- the first measurement result is a result obtained by measurement over a first period in the band of the predetermined bandwidth;
- the second measurement result is a result obtained by measurement over a second period in the extension band;
- the second period is longer than the first period;
- the report of the first measurement result is a report triggered by each of one or more types of events
- the report of the second measurement result is a report triggered by each of at least one type of event including another type of event not included in the one or more types of event.
- the communication control device according to (7).
- the communication control apparatus according to (8), wherein the another type of event is that a relationship between the first measurement result and the second measurement result satisfies a predetermined condition.
- the report of the first measurement result and the report of the second measurement result are reports triggered by at least one same type of event; A part or all of the at least one same type of event includes a first threshold for reporting the first measurement result and a second threshold for reporting the second measurement result. Having The communication control device according to any one of (7) to (9). (11) The report of the first measurement result is a report performed in the first period, The report of the second measurement result is a report performed in a second period different from the first period. The communication control device according to any one of (7) to (10).
- the measurement related information is setting information related to transmission of a control signal used for measurement by a terminal device,
- the control related to the measurement by the terminal device includes control of transmission of the control signal in the extension band,
- the communication control device according to (1) (13) The control of the transmission of the control signal is performed by transmitting the control signal so that a density of the control signal transmitted in the extension band is different from a density of the control signal transmitted in the band of the predetermined bandwidth.
- the communication control device according to (12), including controlling (14) The control of the transmission of the control signal is performed so that a density of the control signal transmitted in the extension band is lower than a density of the control signal transmitted in the band of the predetermined bandwidth.
- the communication control device including controlling transmission of (15) The control of the transmission of the control signal is such that the control signal is transmitted in the extension band with a smaller number of antenna ports than the number of antenna ports to which the control signal is transmitted in the band of the predetermined bandwidth.
- the communication control device according to (14), further comprising controlling transmission of the control signal.
- (16) The communication control device according to (14), wherein the control of the transmission of the control signal includes controlling the transmission of the control signal so that the control signal is not transmitted in the extension band.
- a memory for storing a predetermined program;
- a processor capable of executing the predetermined program;
- the predetermined program is Recognizing an extension band other than a predetermined bandwidth in the frequency band allocated to the operator; Controlling the execution of measurements such that some or all of the measurements in the extended band are not performed; Is a program for executing Information processing device.
- 1 communication system 10 cell 20 UE (User Equipment) 100 eNodeB 151, 161, 171 Information acquisition unit 153, 163, 173 Communication control unit 200 UE (User Equipment) 261 Band recognition unit 265, 271, 283, 293 Measurement control unit 267, 285, 295 Report unit
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Abstract
Description
1.はじめに
2.本開示の実施形態に係る通信システムの概略的な構成
3.第1の実施形態
3.1.eNodeBの構成
3.2.UEの構成
3.3.処理の流れ
3.4.変形例
4.第2の実施形態
4.1.UEの構成
4.2.処理の流れ
5.第3の実施形態
5.1.eNodeBの構成
5.2.UEの構成
5.3.処理の流れ
5.4.変形例
6.第4の実施形態
6.1.eNodeBの構成
6.2.UEの構成
6.3.処理の流れ
6.4.変形例
7.応用例
6.1.eNodeBに関する応用例
6.2.UEに関する応用例
8.まとめ
まず、図1~図4を参照して、キャリアアグリゲーション、拡張帯域(Extension Band)及び測定(measurement)を説明する。
-コンポーネントキャリア
リリース10のキャリアアグリゲーションでは、最大で5つのコンポーネントキャリア(CC)が束ねられて、UE(User Equipment)により使用される。各CCは、最大20MHz幅の帯域である。キャリアアグリゲーションでは、周波数方向で連続するCCが使用される場合と、周波数方向で離れたCCが使用される場合とがある。キャリアアグリゲーションでは、使用されるCCをUE毎に決定することが可能である。
キャリアアグリゲーションでは、UEにより使用される複数のCCのうちの1つが特別なCCである。当該1つの特別なCCは、PCC(Primary Component Carrier)と呼ばれる。また、上記複数のCCのうちの残りは、SCC(Secondary Component Carrier)と呼ばれる。PCCは、UEによって異なり得る。以下、この点について図1を参照してより具体的に説明する。
キャリアアグリゲーションでは、各CCで共通リファレンス信号(Common Reference Signal:CRS)が送信される。なお、共通リファレンス信号は、セル固有のリファレンス信号(Cell-specific Reference Signal)とも呼ばれる。
LTE及びLTE-Aのチャネル帯域幅として、1.4MHz、3MHz、5MHz、10MHz、15MHz及び20MHzの6種類の帯域幅が規定されている。即ち、コンポーネントキャリア(CC)の帯域幅は、6種類の帯域幅の中から選択される。
測定(measurement)とは、伝送路の品質を測定することを示す。測定は、UEにより行われる。そして、当該測定の結果は、UEによりeNodeB(Evolved Node B)に報告される。
測定対象として3種類の周波数帯域がある。第1に、サービングセルで使用している周波数帯域が測定対象である。即ち、UEが接続中のeNodeBとの無線通信に使用している周波数帯域である。キャリアアグリゲーションの場合には、PCC及びSCCが測定対象である。また、第2に、eNodeBにより送信されるシステム情報(System Information)に含まれるホワイトリストの中にある周波数帯域が、測定対象の周波数帯域である。また、第3に、UEが検出した周波数帯域が、測定対象の周波数帯域である。
ダウンリンクの代表的な測定結果は、RSRP(Reference Signal Received Power)及びRSRQ(Reference Signal Received Quality)である。RSRP及びRSRQは、CRS(Cell Specific Reference Symbol)を用いた測定により得られる値である。
CRSは、アンテナポートごとに送信可能である。具体的には、最大4つのアンテナポートの各々についてのCRSが送信され得る。この場合に、CRSは、アンテナポートに応じた位置(即ち、リソースエレメント)で送信される。以下、この点について、図3を参照して具体例を説明する。
CRSは、リリース8から存在し、様々な目的で用いられる。第1に、上述したように、CRSは、測定に用いられる。また、第2に、上述したように、CRSは、チャネル情報を得るために用いられる。さらに、第3に、CRSは、CQI(Chanel Quality Indicator)のeNodeBへのフィードバックのためにも用いられる。また、第4に、送信ダイバーシティ(Transmit Diversity)にも用いられる。
RSRP及びRSSQは、セルの選択(Cell Selection)、セルの再選択(Cell Reselection)、及びハンドオーバのために使用される。
例えば、UEがRRC接続状態である場合に、UEにより報告される測定結果は、例えば、ハンドオーバの決定のために利用される。即ち、eNodeBは、UEにより報告される測定結果に基づいて、ハンドオーバの決定を行う。以下、この点について、図4を参照して説明する。
また、例えば、UEがRRCアイドル状態である場合に、UEにより報告される測定結果は、例えば、セルの選択のために利用される。即ち、UEは、RRC(Radio Resource Control)アイドル状態である場合にも測定を行う。これにより、UEは、ページングチャネルでの情報の受信のために最適なセル又はeNodeBを選択し、ランダムアクセスを行う際の最適なセル又はeNodeBを選択することが可能になる。
所定のイベントが、UEによる測定結果の報告をトリガする。即ち、所定のイベントが発生すると(所定のイベントの条件が満たされると)、UEは、測定結果をeNodeBに報告する。リリース8では、上記所定のイベントとして、イベントA1~A5の5種類のイベントが定められている。また、上記所定のイベントとして、キャリアアグリゲーション用のイベントA6が定められている。
続いて、図5を参照して、本開示の実施形態に係る通信システム1の概略的な構成を説明する。図5は、本開示の実施形態に係る通信システム1の概略的な構成の一例を示す説明図である。図5を参照すると、通信システム1は、eNodeB100、UE20及びUE200を含む。この例では、通信システム1は、LTE、LTE-A又はこれに準ずる通信規格に準拠したシステムである。
eNodeB100は、事業者に割り当てられた周波数帯域において無線通信を行う。
UE20は、セル10に位置する場合に、eNodeB100との無線通信を行う。
UE200は、セル10に位置する場合に、eNodeB100との無線通信を行う。
続いて、図6~図11を参照して、本開示の第1の実施形態を説明する。
まず、図6を参照して、第1の実施形態に係るeNodeB100-1の構成を説明する。図6は、第1の実施形態に係るeNodeB100-1の構成の一例を示すブロック図である。図6を参照すると、eNodeB100-1は、アンテナ部110、無線通信部120、ネットワーク通信部130、記憶部140及び処理部150を含む。
アンテナ部110は、無線信号を受信し、受信された無線信号を無線通信部120へ出力する。また、アンテナ部110は、無線通信部120により出力された送信信号を送信する。
無線通信部120は、事業者に割り当てられた周波数帯域において無線通信を行う。
ネットワーク通信部130は、他の通信ノードと通信する。例えば、ネットワーク通信部130は、他のeNodeB100と通信する。また、例えば、ネットワーク通信部130は、コアネットワークの通信ノードと通信する。例えば、当該コアネットワークは、EPC(Evolved Packet Core)であり、当該通信ノードは、MME(Mobility Management Entity)、S-GW(Serving Gateway)等を含む。
記憶部140は、eNodeB100の動作のためのプログラム及びデータを記憶する。
処理部150は、eNodeB100-1の様々な機能を提供する。処理部150は、情報取得部151及び通信制御部153を含む。
情報取得部151は、事業者に割り当てられた周波数帯域のうちのコンポーネントキャリア(所定帯域幅の帯域)以外の拡張帯域におけるUEによる測定の実行に関連する測定関連情報を取得する。
通信制御部153は、セル10内での無線通信を制御する。
また、とりわけ第1の実施形態では、上記測定関連制御は、上記拡張帯域におけるUEによる測定の実行の制御を含む。即ち、通信制御部153は、上記測定関連情報に基づいて、上記拡張帯域におけるUEによる測定の実行の制御を行う。
例えば、上記測定関連制御は、上記拡張帯域において測定を行うこと又は測定を行わないことをUE200-1に指示することを含む。
また、例えば、通信制御部153は、無線通信部120を介して、UE200-1への個別のシグナリングにより、測定の実行又は不実行をUE200-1に指示する。一例として、当該シグナリングは、Connection Setupの際のシグナリングである。また、別の例として、当該シグナリングは、RRCシグナリングである。このような個別の指示により、個々のUEごとに別々の指示を行うことが可能になる。即ち、あるUE200-1には拡張帯域における測定を行わせ、別のUE200-1には拡張帯域における測定を行わせないことが可能になる。
例えば以上のように、上記拡張帯域におけるUEによる測定の実行の制御が行われる。これにより、例えば、運用者が拡張帯域における測定が不要であると判断した場合にUE200-1に拡張帯域での測定を省略させることも可能になる。そのため、割り当てられた周波数帯域が有効に利用される場合(即ち、拡張帯域も利用される場合)にUE200-1による測定の負荷を抑えることが可能になる。
例えば、通信制御部153は、上記拡張帯域に関する情報をUE200-1に通知する。具体的には、例えば、上記拡張帯域に関する上記情報は、上記拡張帯域の帯域幅及び/又は中心周波数等の情報を含む。例えば、通信制御部153は、システム情報により、上記拡張帯域に関する上記情報をUE200-1に通知する。なお、通信制御部153は、いずれかのシグナリング(Connection Setupの際のシグナリング、RRCシグナリング、等)により、上記拡張帯域に関する上記情報をUE200-1に通知してもよい。
まず、図7を参照して、第1の実施形態に係るUE200-1の構成を説明する。図7は、第1の実施形態に係るUE200-1の構成の一例を示すブロック図である。図7を参照すると、UE200-1は、アンテナ部210、無線通信部220、記憶部230、入力部240、表示部250及び処理部260を含む。
アンテナ部210は、無線信号を受信し、受信された無線信号を無線通信部220へ出力する。また、アンテナ部210は、無線通信部220により出力された送信信号を送信する。
無線通信部220は、UE200がセル10に位置する場合に、eNodeB100との無線通信を行う。
記憶部230は、UE200の動作のためのプログラム及びデータを記憶する。
入力部240は、UE200のユーザによる入力を受け付ける。そして、入力部240は、入力結果を処理部260に提供する。
表示部250は、UE200からの出力画面(即ち、出力画像)を表示する。例えば、表示部250は、処理部260(表示制御部269)による制御に応じて、出力画面を表示する。
処理部260は、UE200-1の様々な機能を提供する。処理部260は、帯域認識部261、測定部263、測定制御部265、報告部267及び表示制御部269を含む。
帯域認識部261は、事業者に割り当てられた周波数帯域のうちのコンポーネントキャリア(所定帯域幅の帯域)以外の拡張帯域を認識する。
測定部263は、事業者に割り当てられた周波数帯域における測定(measurement)を行う。
測定制御部265は、UE200-1による測定の実行を制御する。
報告部267は、UE200-1による測定結果をeNodeB100-1に報告する。
表示制御部269は、表示部250による出力画面の表示を制御する。例えば、表示制御部269は、表示部250により表示される出力画面を生成し、当該出力画面を表示部250に表示させる。
次に、図8及び図9を参照して、第1の実施形態に係る通信制御処理の例を説明する。
図8は、第1の実施形態に係るeNodeB100-1側の通信制御処理の概略的な流れの一例を示すフローチャートである。例えば、eNodeB100-1側の当該通信制御処理は、eNodeB100-1の運用の開始又は再開の際に開始する。
図9は、第1の実施形態に係るUE200-1側の通信制御処理の概略的な流れの一例を示すフローチャートである。例えば、UE200-1側の当該通信制御処理は、eNodeB100-1から拡張帯域における測定についての指示を受けた際に開始する。
次に、図10及び図11を参照して、第1の実施形態の変形例を説明する。
--UEへの指示
とりわけ第1実施形態の変形例では、上記測定関連制御は、上記周波数帯域を通信に使用しているUE200-1が上記拡張帯域において測定を行わないように、上記拡張帯域において測定を行うこと、又は行わないことを、UE200-1に指示することを含む。
とりわけ第1の実施形態の変形例では、測定制御部265は、eNodeB100-1による上記測定関連制御(即ち、上記拡張帯域におけるUEによる測定に関連する制御)に応じて、上記拡張帯域における測定の実行を制御する。そして、測定制御部265は、UE200-1が上記周波数帯域を通信に使用している場合に上記拡張帯域における測定が行われないように、測定の実行を制御する。
図10は、第1の実施形態の変形例に係るeNodeB100-1側の通信制御処理の概略的な流れの一例を示すフローチャートである。
図11は、第1の実施形態の1の変形例に係るUE200-1側の通信制御処理の概略的な流れの一例を示すフローチャートである。
続いて、図12及び図13を参照して、本開示の第2の実施形態を説明する。
まず、図12を参照して、第2の実施形態に係るUE200-2の概略的な構成を説明する。図12は、第2の実施形態に係るUE200-2の構成の一例を示すブロック図である。図12を参照すると、UE200-2は、アンテナ部210、無線通信部220、記憶部230、入力部240、表示部250及び処理部270を含む。
測定制御部271は、UE200-2による測定の実行を制御する。
次に、図13を参照して、第2の実施形態に係る通信制御処理の例を説明する。図13は、第2の実施形態に係るUE200-2側の通信制御処理の概略的な流れの一例を示すフローチャートである。
続いて、図14~図25を参照して、本開示の第3の実施形態を説明する。
まず、図14を参照して、第3の実施形態に係るeNodeB100-3の概略的な構成を説明する。図14は、第3の実施形態に係るeNodeB100-3の構成の一例を示すブロック図である。図6を参照すると、eNodeB100-1は、アンテナ部110、無線通信部120、ネットワーク通信部130、記憶部140及び処理部160を含む。
処理部160は、eNodeB100-3の様々な機能を提供する。処理部160は、情報取得部161及び通信制御部163を含む。
情報取得部161は、UEによる測定の結果を取得する。
通信制御部163は、セル10内での無線通信を制御する。
まず、図15~図18を参照して、第3の実施形態に係るUE200-3の概略的な構成を説明する。図15は、第3の実施形態に係るUE200-3の構成の一例を示すブロック図である。図15を参照すると、UE200-3は、アンテナ部210、無線通信部220、記憶部230、入力部240、表示部250及び処理部280を含む。
測定部281は、事業者に割り当てられた周波数帯域における測定を行う。
とりわけ第3の実施形態では、測定部281は、CC及び拡張帯域における測定を行う場合に、CCにおける測定と、拡張帯域における測定とをそれぞれ行う。
また、例えば、上記第1の測定結果は、CCにおける第1の期間にわたる測定により得られる結果であり、上記第2の測定結果は、拡張帯域における第2の期間にわたる測定により得られる結果である。そして、上記第2の期間は、上記第1の期間よりも長い。即ち、測定部281は、CCにおける第1の期間での測定を行い、拡張帯域における(第1の期間よりも長い)第2の期間での測定を行う。
測定制御部283は、UE200-3による測定の実行を制御する。
報告部285は、UE200-3による測定結果をeNodeB100-3に報告する。報告部285は、無線通信部220を介して、当該測定結果を報告する。
第1の例として、上記第1の測定結果の報告は、1種類以上のイベントの各々によりトリガされる報告である。また、上記第2の測定結果の報告は、上記1種類以上のイベントに含まれない別の種類のイベントを含む少なくとも1種類のイベントの各々によりトリガされる報告である。これにより、例えば、拡張帯域における測定結果を、より適した独自のタイミングで報告することが可能になる。
第2の例として、上記第1の測定結果の報告及び上記第2の測定結果の報告は、少なくとも1つの同じ種類のイベントによりトリガされる報告であってもよい。そして、上記少なくとも1つの同じ種類のイベントのうちの一部又は全部は、上記第1の測定結果の報告のための第1の閾値と、上記第2の測定結果の報告のための第2の閾値とを有してもよい。
第3の例として、上記第1の測定結果の報告は、第1の周期で行われる報告であり、上記第2の測定結果の報告は、上記第1の周期と異なる第2の周期で行われる報告であってもよい。
次に、図19~図21を参照して、第3の実施形態に係る通信制御処理の例を説明する。
図19は、第3の実施形態に係るeNodeB100-3側の通信制御処理の概略的な流れの一例を示すフローチャートである。
図20は、第3の実施形態に係るUE200-3側の第1の通信制御処理の概略的な流れの一例を示すフローチャートである。当該第1の通信制御処理は、CCにおける測定に関する処理である。
図21は、第3の実施形態に係るUE200-3側の第2の通信制御処理の概略的な流れの一例を示すフローチャートである。当該第2の通信制御処理は、拡張帯域における測定に関する処理である。
次に、図22~図25を参照して、第3の実施形態の変形例を説明する。
とりわけ第3の実施形態の変形例では、情報取得部161は、CC及び拡張帯域に関する測定結果の報告単位に関する情報(以下、「報告単位情報」と呼ぶ)を取得する。
とりわけ第3の実施形態の変形例では、通信制御部163は、測定の報告単位をUE200-3に指示する。例えば、通信制御部163は、CCにおける測定の結果と拡張帯域における測定の結果をそれぞれ報告すること、及び/又は、CC及び拡張帯域を含む帯域における測定の結果を報告することを、UE200-3に指示する。
とりわけ第3の実施形態の変形例では、測定部281は、測定制御部283による制御に応じて、CCにおける測定と拡張帯域における測定とをそれぞれ行い、又は、CC及び拡張帯域を含む帯域における測定を行う。測定部281がCCにおける測定と拡張帯域における測定とをそれぞれ行う場合に、CCにおける測定の結果(第1の測定結果)と拡張帯域における測定の結果(第2の測定結果)とが得られる。また、測定部281が、CC及び拡張帯域を含む帯域における測定を行う場合に、CC及び拡張帯域を含む帯域における測定の結果(統合測定結果)が得られる。
とりわけ第3の実施形態の変形例では、測定制御部283は、eNodeB100-3による制御に応じて、測定の実行を制御する。
とりわけ第3の実施形態の変形例では、報告部285は、eNodeB100-3による制御に応じて、UE200-3による測定結果をeNodeB100-3に報告する。
図22は、第3の実施形態の変形例に係るeNodeB100-3側の第1の通信制御処理の概略的な流れの一例を示すフローチャートである。当該第1の通信制御処理は、測定の報告単位の指示に関する処理である。
図23は、第3の実施形態の変形例に係るeNodeB100-3側の第2の通信制御処理の概略的な流れの一例を示すフローチャートである。当該第2の通信制御処理は、統合測定結果がUE200-3からeNodeB100-3に報告される場合の処理である。なお、第1の測定結果及び第2の測定結果が報告される場合の処理は図19を参照して上述したとおりである。
図24は、第3の実施形態の変形例に係るUE200-3側の通信制御処理の概略的な流れの一例を示すフローチャートである。
図25は、第3の実施形態の変形例に係るUE200-3側の第2の測定報告処理の概略的な流れの一例を示すフローチャートである。
続いて、図26~図34を参照して、本開示の第4の実施形態を説明する。
まず、図26及び図27を参照して、第4の実施形態に係るeNodeB100-4の概略的な構成を説明する。図26は、第4の実施形態に係るeNodeB100-4の構成の一例を示すブロック図である。図26を参照すると、eNodeB100-4は、アンテナ部110、無線通信部120、ネットワーク通信部130、記憶部140及び処理部170を含む。
処理部170は、eNodeB100-4の様々な機能を提供する。処理部170は、情報取得部171及び通信制御部173を含む。
情報取得部151は、事業者に割り当てられた周波数帯域のうちのコンポーネントキャリア(所定帯域幅の帯域)以外の拡張帯域におけるUEによる測定の実行に関連する測定関連情報を取得する。
通信制御部173は、セル10内での無線通信を制御する。
また、とりわけ第4の実施形態では、上記測定関連制御は、上記拡張帯域における上記制御信号の送信の制御(以下、「制御信号送信制御」と呼ぶ)を含む。即ち、通信制御部173は、上記拡張帯域における上記制御信号の送信の制御(即ち、制御信号送信制御)を行う。例えば、通信制御部173は、上記測定関連情報に基づいて、制御信号送信制御を行う。
例えば、通信制御部173は、制御信号が送信される位置(無線リソース)を示す情報をUE200-4に通知する。一例として、上記情報は、CCにおいて上記制御信号を送信するアンテナポート、及び拡張帯域において上記制御信号を送信するアンテナポートを示す情報である。例えば、通信制御部173は、システム情報により、上記情報をUE200-4に通知する。なお、通信制御部173は、いずれかのシグナリング(Connection Setupの際のシグナリング、RRCシグナリング、等)により、上記情報をUE200-4に通知してもよい。
まず、図28を参照して、第4の実施形態に係るUE200-4の概略的な構成を説明する。図28は、第4の実施形態に係るUE200-4の構成の一例を示すブロック図である。図28を参照すると、UE200-4は、アンテナ部210、無線通信部220、記憶部230、入力部240、表示部250及び処理部290を含む。
測定部291は、事業者に割り当てられた周波数帯域における測定を行う。
測定制御部293は、UE200-4による測定の実行を制御する。
報告部295は、UE200-4による測定結果をeNodeB100-4に報告する。
次に、図29~図31を参照して、第4の実施形態に係る通信制御処理の例を説明する。
図29は、第4の実施形態に係るeNodeB100-4側の第1の通信制御処理の概略的な流れの一例を示すフローチャートである。当該第1の通信制御処理は、制御信号の送信に関する処理である。
図30は、第4の実施形態に係るeNodeB100-4側の第2の通信制御処理の概略的な流れの一例を示すフローチャートである。当該第2の通信制御処理は、制御信号が送信される位置(無線リソース)を示す情報の通知に関する処理である。
図31は、第4の実施形態に係るUE200-4側の通信制御処理の概略的な流れの一例を示すフローチャートである。
次に、図32~図34を参照して、第4の実施形態の変形例を説明する。
上述したように、上記測定関連情報は、UEによる測定に用いられる制御信号の送信に関する設定情報である。
-制御信号の送信の制御
上述したように、とりわけ第4の実施形態では、上記測定関連制御は、上記拡張帯域における上記制御信号の送信の制御(以下、「制御信号送信制御」と呼ぶ)を含む。即ち、通信制御部173は、上記拡張帯域における上記制御信号の送信の制御(即ち、制御信号送信制御)を行う。例えば、通信制御部173は、上記測定関連情報に基づいて、制御信号送信制御を行う。
例えば、通信制御部173は、上記制御信号が送信される帯域を示す情報をUE200-4に通知する。例えば、当該情報は、CCを示す情報、又は、CC及び拡張帯域を示す情報のいずれかである。例えば、通信制御部173は、システム情報により、上記情報をUE200-4に通知する。なお、通信制御部173は、いずれかのシグナリング(Connection Setupの際のシグナリング、RRCシグナリング、等)により、上記情報をUE200-4に通知してもよい。
上述したように、測定部291は、測定制御部293による制御に応じて上記測定を行う。
上述したように、上記拡張帯域において送信される上記制御信号の密度は、CCにおいて送信される上記制御信号の密度よりも低くなる。そして、測定制御部293は、少なくとも、CCにおいて送信される上記制御信号を用いてCCにおける測定を行うように、UE200-4による測定の実行を制御する。
とりわけ第4の実施形態の変形例では、拡張帯域における測定が行われない場合に、報告部295は、CCにおける測定の結果を報告する。
図32は、第4の実施形態の変形例に係るeNodeB100-4側の第1の通信制御処理の概略的な流れの一例を示すフローチャートである。当該第1の通信制御処理は、制御信号の送信に関する処理である。
図33は、第4の実施形態の変形例に係るeNodeB100-4側の第2の通信制御処理の概略的な流れの一例を示すフローチャートである。当該第2の通信制御処理は、制御信号が送信される帯域を示す情報の通知に関する処理である。
図34は、第4の実施形態の変形例に係るUE200-4側の通信制御処理の概略的な流れの一例を示すフローチャートである。
本開示に係る技術は、様々な製品へ応用可能である。例えば、eNodeB100は、マクロeNodeB又はスモールeNodeBなどのいずれかの種類のeNodeBとして実現されてもよい。スモールeNodeBは、ピコeNodeB、マイクロeNodeB又はホーム(フェムト)eNodeBなどの、マクロセルよりも小さいセルをカバーするeNodeBであってよい。eNodeB100は、無線通信を制御する本体(基地局装置ともいう)と、本体とは別の場所に配置される1つ以上のRRH(Remote Radio Head)とを含んでもよい。また、後述する様々な種類の端末が一時的に又は半永続的に基地局機能を実行することにより、eNodeB100として動作してもよい。
(第1の応用例)
図35は、本開示に係る技術が適用され得るeNodeBの概略的な構成の第1の例を示すブロック図である。eNodeB800は、1つ以上のアンテナ810、及び基地局装置820を有する。各アンテナ810及び基地局装置820は、RFケーブルを介して互いに接続され得る。
図36は、本開示に係る技術が適用され得るeNodeBの概略的な構成の第2の例を示すブロック図である。eNodeB830は、1つ以上のアンテナ840、基地局装置850、及びRRH860を有する。各アンテナ840及びRRH860は、RFケーブルを介して互いに接続され得る。また、基地局装置850及びRRH860は、光ファイバケーブルなどの高速回線で互いに接続され得る。
(第1の応用例)
図37は、本開示に係る技術が適用され得るスマートフォン900の概略的な構成の一例を示すブロック図である。スマートフォン900は、プロセッサ901、メモリ902、ストレージ903、外部接続インタフェース904、カメラ906、センサ907、マイクロフォン908、入力デバイス909、表示デバイス910、スピーカ911、無線通信インタフェース912、1つ以上のアンテナスイッチ915、1つ以上のアンテナ916、バス917、バッテリー918及び補助コントローラ919を備える。
図38は、本開示に係る技術が適用され得るカーナビゲーション装置920の概略的な構成の一例を示すブロック図である。カーナビゲーション装置920は、プロセッサ921、メモリ922、GPS(Global Positioning System)モジュール924、センサ925、データインタフェース926、コンテンツプレーヤ927、記憶媒体インタフェース928、入力デバイス929、表示デバイス930、スピーカ931、無線通信インタフェース933、1つ以上のアンテナスイッチ936、1つ以上のアンテナ937及びバッテリー938を備える。
ここまで、図5~図38を参照して、本開示の実施形態に係るeNodeB100及びUE200、並びに各通信制御処理を説明した。本開示に係る実施形態によれば、事業者に割り当てられた周波数帯域のうちのコンポーネントキャリア(所定帯域幅の帯域)以外の拡張帯域におけるUEによる測定の実行に関連する測定関連情報が取得される。そして、上記測定関連情報に基づいて、上記拡張帯域におけるUEによる測定に関連する制御(即ち、測定関連制御)が行われる。
例えば、第1の実施形態によれば、上記測定関連情報は、上記拡張帯域におけるUEによる測定の実行の有無に関する情報である。そして、上記測定関連制御は、上記拡張帯域におけるUEによる測定の実行の制御を含む。具体的には、例えば、上記測定関連制御は、上記拡張帯域において測定を行うこと又は測定を行わないことをUE200-1に指示することを含む。
また、第2の実施形態によれば、UE200-2が無線リソースについてのアイドル状態である場合に、事業者に割り当てられた周波数帯域のうちのCC(所定帯域幅の帯域)以外の拡張帯域における測定が行われないように、測定の実行が制御される。
また、第3の実施形態によれば、CCにおけるUE200-3による測定の結果である第1の測定結果と、拡張帯域におけるUE200-3による測定の結果である第2の測定結果とが、それぞれ取得される。
また、第4の実施形態によれば、上記測定関連情報は、UEによる測定に用いられる制御信号の送信に関する設定情報である。そして、上記測定関連制御は、上記拡張帯域における上記制御信号の送信の制御(即ち、制御信号送信制御)を含む。
(1)
事業者に割り当てられた周波数帯域のうちの所定帯域幅の帯域以外の拡張帯域における端末装置による測定の実行に関連する測定関連情報を取得する取得部と、
前記測定関連情報に基づいて、前記拡張帯域における端末装置による測定に関連する制御を行う制御部と、
を備える通信制御装置。
(2)
前記測定関連情報は、前記拡張帯域における端末装置による測定の実行の有無に関する情報であり、
端末装置による測定に関連する前記制御は、前記拡張帯域における端末装置による測定の実行の制御を含む、
前記(1)に記載の通信制御装置。
(3)
端末装置による測定の実行の前記制御は、前記拡張帯域において測定を行うこと又は測定を行わないことを、端末装置に指示することを含む、前記(2)に記載の通信制御装置。
(4)
端末装置による測定の実行の前記制御は、前記周波数帯域を通信に使用している端末装置が前記拡張帯域において測定を行わないように、前記拡張帯域において測定を行うこと、又は行わないことを、端末装置に指示することを含む、前記(3)に記載の通信制御装置。
(5)
前記取得部は、前記所定帯域幅の前記帯域における端末装置による測定の結果である第1の測定結果と、前記拡張帯域における端末装置による測定の結果である第2の測定結果とを、それぞれ取得する、前記(1)~(4)のいずれか1項に記載の通信制御装置。
(6)
前記第1の測定結果は、前記所定帯域幅の前記帯域における第1の期間にわたる測定により得られる結果であり、
前記第2の測定結果は、前記拡張帯域における第2の期間にわたる測定により得られる結果であり、
前記第2の期間は、前記第1の期間よりも長い、
前記(5)に記載の通信制御装置。
(7)
前記第2の測定結果の報告が行われる条件は、前記第1の測定結果の報告が行われる条件とは異なる、前記(5)又は(6)に記載の通信制御装置。
(8)
前記第1の測定結果の報告は、1種類以上のイベントの各々によりトリガされる報告であり、
前記第2の測定結果の報告は、前記1種類以上のイベントに含まれない別の種類のイベントを含む少なくとも1種類のイベントの各々によりトリガされる報告である、
前記(7)に記載の通信制御装置。
(9)
前記別の種類のイベントは、前記第1の測定結果と前記第2の測定結果との関係が所定の条件を満たすことである、前記(8)に記載の通信制御装置。
(10)
前記第1の測定結果の報告及び前記第2の測定結果の報告は、少なくとも1つの同じ種類のイベントによりトリガされる報告であり、
前記少なくとも1つの同じ種類のイベントのうちの一部又は全部は、前記第1の測定結果の報告のための第1の閾値と、前記第2の測定結果の報告のための第2の閾値とを有する、
前記(7)~(9)のいずれか1項に記載の通信制御装置。
(11)
前記第1の測定結果の報告は、第1の周期で行われる報告であり、
前記第2の測定結果の報告は、前記第1の周期と異なる第2の周期で行われる報告である、
前記(7)~(10)のいずれか1項に記載の通信制御装置。
(12)
前記測定関連情報は、端末装置による測定に用いられる制御信号の送信に関する設定情報であり、
端末装置による測定に関連する前記制御は、前記拡張帯域における前記制御信号の送信の制御を含む、
前記(1)に記載の通信制御装置。
(13)
前記制御信号の送信の前記制御は、前記拡張帯域において送信される前記制御信号の密度が、前記所定帯域幅の前記帯域において送信される前記制御信号の密度と異なるように、前記制御信号の送信を制御することを含む、前記(12)に記載の通信制御装置。
(14)
前記制御信号の送信の前記制御は、前記拡張帯域において送信される前記制御信号の密度が、前記所定帯域幅の前記帯域において送信される前記制御信号の密度よりも低くなるように、前記制御信号の送信を制御することを含む、前記(13)に記載の通信制御装置。
(15)
前記制御信号の送信の前記制御は、前記所定帯域幅の前記帯域において前記制御信号が送信されるアンテナポートの数よりも小さい数のアンテナポートで、前記拡張帯域において前記制御信号が送信されるように、前記制御信号の送信を制御することを含む、前記(14)に記載の通信制御装置。
(16)
前記制御信号の送信の前記制御は、前記拡張帯域において前記制御信号が送信されないように、前記制御信号の送信を制御することを含む、前記(14)に記載の通信制御装置。
(17)
事業者に割り当てられた周波数帯域のうちの所定帯域幅の帯域以外の拡張帯域における端末装置による測定の実行に関連する測定関連情報を取得することと、
前記測定関連情報に基づいて、前記拡張帯域における端末装置による測定に関連する制御を行うことと、
を含む通信制御方法。
(18)
事業者に割り当てられた周波数帯域のうちの所定帯域幅の帯域以外の拡張帯域を認識する認識部と、
前記拡張帯域における測定の一部又は全部が行われないように、測定の実行を制御する制御部と、
を備える端末装置。
(19)
前記制御部は、前記端末装置が無線リソースについてのアイドル状態にある場合に、前記拡張帯域における測定が行われないように、測定の実行を制御する、前記(18)に記載の端末装置。
(20)
所定のプログラムを記憶するメモリと、
前記所定のプログラムを実行可能なプロセッサと、
を備え、
前記所定のプログラムは、
事業者に割り当てられた周波数帯域のうちの所定帯域幅の帯域以外の拡張帯域を認識することと、
前記拡張帯域における測定の一部又は全部が行われないように、測定の実行を制御することと、
を実行させるためのプログラムである、
情報処理装置。
10 セル
20 UE(User Equipment)
100 eNodeB
151、161、171 情報取得部
153、163、173 通信制御部
200 UE(User Equipment)
261 帯域認識部
265、271、283、293 測定制御部
267、285、295 報告部
Claims (20)
- 事業者に割り当てられた周波数帯域のうちの所定帯域幅の帯域以外の拡張帯域における端末装置による測定の実行に関連する測定関連情報を取得する取得部と、
前記測定関連情報に基づいて、前記拡張帯域における端末装置による測定に関連する制御を行う制御部と、
を備える通信制御装置。 - 前記測定関連情報は、前記拡張帯域における端末装置による測定の実行の有無に関する情報であり、
端末装置による測定に関連する前記制御は、前記拡張帯域における端末装置による測定の実行の制御を含む、
請求項1に記載の通信制御装置。 - 端末装置による測定の実行の前記制御は、前記拡張帯域において測定を行うこと又は測定を行わないことを、端末装置に指示することを含む、請求項2に記載の通信制御装置。
- 端末装置による測定の実行の前記制御は、前記周波数帯域を通信に使用している端末装置が前記拡張帯域において測定を行わないように、前記拡張帯域において測定を行うこと、又は行わないことを、端末装置に指示することを含む、請求項3に記載の通信制御装置。
- 前記取得部は、前記所定帯域幅の前記帯域における端末装置による測定の結果である第1の測定結果と、前記拡張帯域における端末装置による測定の結果である第2の測定結果とを、それぞれ取得する、請求項1に記載の通信制御装置。
- 前記第1の測定結果は、前記所定帯域幅の前記帯域における第1の期間にわたる測定により得られる結果であり、
前記第2の測定結果は、前記拡張帯域における第2の期間にわたる測定により得られる結果であり、
前記第2の期間は、前記第1の期間よりも長い、
請求項5に記載の通信制御装置。 - 前記第2の測定結果の報告が行われる条件は、前記第1の測定結果の報告が行われる条件とは異なる、請求項5に記載の通信制御装置。
- 前記第1の測定結果の報告は、1種類以上のイベントの各々によりトリガされる報告であり、
前記第2の測定結果の報告は、前記1種類以上のイベントに含まれない別の種類のイベントを含む少なくとも1種類のイベントの各々によりトリガされる報告である、
請求項7に記載の通信制御装置。 - 前記別の種類のイベントは、前記第1の測定結果と前記第2の測定結果との関係が所定の条件を満たすことである、請求項8に記載の通信制御装置。
- 前記第1の測定結果の報告及び前記第2の測定結果の報告は、少なくとも1つの同じ種類のイベントによりトリガされる報告であり、
前記少なくとも1つの同じ種類のイベントのうちの一部又は全部は、前記第1の測定結果の報告のための第1の閾値と、前記第2の測定結果の報告のための第2の閾値とを有する、
請求項7に記載の通信制御装置。 - 前記第1の測定結果の報告は、第1の周期で行われる報告であり、
前記第2の測定結果の報告は、前記第1の周期と異なる第2の周期で行われる報告である、
請求項7に記載の通信制御装置。 - 前記測定関連情報は、端末装置による測定に用いられる制御信号の送信に関する設定情報であり、
端末装置による測定に関連する前記制御は、前記拡張帯域における前記制御信号の送信の制御を含む、
請求項1に記載の通信制御装置。 - 前記制御信号の送信の前記制御は、前記拡張帯域において送信される前記制御信号の密度が、前記所定帯域幅の前記帯域において送信される前記制御信号の密度と異なるように、前記制御信号の送信を制御することを含む、請求項12に記載の通信制御装置。
- 前記制御信号の送信の前記制御は、前記拡張帯域において送信される前記制御信号の密度が、前記所定帯域幅の前記帯域において送信される前記制御信号の密度よりも低くなるように、前記制御信号の送信を制御することを含む、請求項13に記載の通信制御装置。
- 前記制御信号の送信の前記制御は、前記所定帯域幅の前記帯域において前記制御信号が送信されるアンテナポートの数よりも小さい数のアンテナポートで、前記拡張帯域において前記制御信号が送信されるように、前記制御信号の送信を制御することを含む、請求項14に記載の通信制御装置。
- 前記制御信号の送信の前記制御は、前記拡張帯域において前記制御信号が送信されないように、前記制御信号の送信を制御することを含む、請求項14に記載の通信制御装置。
- 事業者に割り当てられた周波数帯域のうちの所定帯域幅の帯域以外の拡張帯域における端末装置による測定の実行に関連する測定関連情報を取得することと、
前記測定関連情報に基づいて、前記拡張帯域における端末装置による測定に関連する制御を行うことと、
を含む通信制御方法。 - 事業者に割り当てられた周波数帯域のうちの所定帯域幅の帯域以外の拡張帯域を認識する認識部と、
前記拡張帯域における測定の一部又は全部が行われないように、測定の実行を制御する制御部と、
を備える端末装置。 - 前記制御部は、前記端末装置が無線リソースについてのアイドル状態にある場合に、前記拡張帯域における測定が行われないように、測定の実行を制御する、請求項18に記載の端末装置。
- 所定のプログラムを記憶するメモリと、
前記所定のプログラムを実行可能なプロセッサと、
を備え、
前記所定のプログラムは、
事業者に割り当てられた周波数帯域のうちの所定帯域幅の帯域以外の拡張帯域を認識することと、
前記拡張帯域における測定の一部又は全部が行われないように、測定の実行を制御することと、
を実行させるためのプログラムである、
情報処理装置。
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AU (1) | AU2014266562B2 (ja) |
BR (1) | BR112015028198A2 (ja) |
WO (1) | WO2014185185A1 (ja) |
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US10531326B2 (en) | 2017-07-26 | 2020-01-07 | Kt Corporation | Methods of controlling measurement process in RRC idle mode and apparatuses thereof |
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Also Published As
Publication number | Publication date |
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AU2014266562B2 (en) | 2017-03-02 |
JPWO2014185185A1 (ja) | 2017-02-23 |
JP6424817B2 (ja) | 2018-11-21 |
US20160057645A1 (en) | 2016-02-25 |
US10149191B2 (en) | 2018-12-04 |
CN105191393A (zh) | 2015-12-23 |
EP2999257A4 (en) | 2016-12-28 |
AU2014266562A1 (en) | 2015-11-12 |
CN110300425A (zh) | 2019-10-01 |
EP2999257B1 (en) | 2020-02-12 |
EP2999257A1 (en) | 2016-03-23 |
CN105191393B (zh) | 2019-08-06 |
BR112015028198A2 (pt) | 2017-07-25 |
CN110300425B (zh) | 2022-11-15 |
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