WO2016136958A1 - 無線端末及びプロセッサ - Google Patents
無線端末及びプロセッサ Download PDFInfo
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- WO2016136958A1 WO2016136958A1 PCT/JP2016/055882 JP2016055882W WO2016136958A1 WO 2016136958 A1 WO2016136958 A1 WO 2016136958A1 JP 2016055882 W JP2016055882 W JP 2016055882W WO 2016136958 A1 WO2016136958 A1 WO 2016136958A1
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- wireless terminal
- network
- control unit
- drx operation
- extended drx
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/20—Manipulation of established connections
- H04W76/28—Discontinuous transmission [DTX]; Discontinuous reception [DRX]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
- H04W52/0216—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave using a pre-established activity schedule, e.g. traffic indication frame
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
- H04W52/0229—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a wanted signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
- H04W4/025—Services making use of location information using location based information parameters
- H04W4/027—Services making use of location information using location based information parameters using movement velocity, acceleration information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Definitions
- the present invention relates to a wireless terminal and a processor used in a mobile communication system.
- discontinuous reception In 3GPP (3rd Generation Partnership Project), a standardization project for mobile communication systems, discontinuous reception (DRX) is defined as an intermittent reception technique for reducing power consumption of wireless terminals.
- a radio terminal performing the DRX operation intermittently monitors the downlink control channel. The period for monitoring the downlink control channel is called “DRX cycle”.
- extended DRX extended DRX
- a wireless terminal is used in a mobile communication system.
- the wireless terminal When an extended DRX operation for intermittently monitoring a downlink control channel is set from the network, the wireless terminal relates to the extended DRX operation based on a comparison result between a value related to a moving speed of the wireless terminal and a threshold value.
- a control unit that performs control is provided.
- a processor controls a wireless terminal of a mobile communication system.
- the processor controls the extended DRX operation based on a comparison result between a value related to the moving speed of the wireless terminal and a threshold value. I do.
- a radio terminal is used in a mobile communication system.
- the wireless terminal When an extended DRX operation for intermittently monitoring a downlink control channel is set from the network, the wireless terminal relates to the extended DRX operation based on a comparison result between a value related to a moving speed of the wireless terminal and a threshold value.
- a control unit that performs control is provided.
- a processor controls a wireless terminal of a mobile communication system.
- the processor controls the extended DRX operation based on a comparison result between a value related to the moving speed of the wireless terminal and a threshold value. I do.
- a wireless terminal is used in a mobile communication system.
- the wireless terminal prohibits the extended DRX operation if the network is asynchronous between cells.
- a processor controls a wireless terminal used in a mobile communication system.
- the processor prohibits the extended DRX operation when the network is asynchronous between cells.
- FIG. 1 is a diagram illustrating a configuration of an LTE system.
- the LTE system includes a UE (User Equipment) 100, an E-UTRAN (Evolved-UMTS Terrestrial Radio Access Network) 10, and an EPC (Evolved Packet Core) 20.
- UE User Equipment
- E-UTRAN Evolved-UMTS Terrestrial Radio Access Network
- EPC Evolved Packet Core
- the UE 100 corresponds to a wireless terminal.
- the UE 100 is a mobile communication device, and performs radio communication with a cell (serving cell).
- the configuration of the UE 100 will be described later.
- the E-UTRAN 10 corresponds to a radio access network.
- the E-UTRAN 10 includes an eNB 200 (evolved Node-B).
- the eNB 200 corresponds to a base station.
- the eNB 200 is connected to each other via the X2 interface. The configuration of the eNB 200 will be described later.
- the eNB 200 manages one or a plurality of cells, and performs radio communication with the UE 100 that has established a connection with a cell (self cell) managed by the eNB 200.
- the eNB 200 has a radio resource management (RRM) function, a routing function of user data (hereinafter simply referred to as “data”), a measurement control function for mobility control / scheduling, and the like.
- RRM radio resource management
- Cell is used as a term indicating a minimum unit of a radio communication area, and is also used as a term indicating a function of performing radio communication with the UE 100.
- the EPC 20 corresponds to a core network.
- the EPC 20 includes an MME (Mobility Management Entity) / S-GW (Serving-Gateway) 300.
- MME Mobility Management Entity
- S-GW Serving-Gateway
- MME performs various mobility control etc. with respect to UE100.
- the S-GW performs data transfer control.
- the MME / S-GW 300 is connected to the eNB 200 via the S1 interface.
- the E-UTRAN 10 and the EPC 20 constitute a network.
- FIG. 2 is a protocol stack diagram of a radio interface in the LTE system.
- the radio interface protocol is divided into the first to third layers of the OSI reference model, and the first layer is a physical (PHY) layer.
- the second layer includes a MAC (Medium Access Control) layer, an RLC (Radio Link Control) layer, and a PDCP (Packet Data Convergence Protocol) layer.
- the third layer includes an RRC (Radio Resource Control) layer.
- the physical layer performs encoding / decoding, modulation / demodulation, antenna mapping / demapping, and resource mapping / demapping.
- Data and control signals are transmitted between the physical layer of the UE 100 and the physical layer of the eNB 200 via a physical channel.
- the MAC layer performs data priority control, retransmission processing by hybrid ARQ (HARQ), random access procedure, and the like. Data and control signals are transmitted between the MAC layer of the UE 100 and the MAC layer of the eNB 200 via a transport channel.
- the MAC layer of the eNB 200 includes a scheduler that determines an uplink / downlink transport format (transport block size, modulation / coding scheme (MCS)) and an allocation resource block to the UE 100.
- MCS modulation / coding scheme
- the RLC layer transmits data to the RLC layer on the receiving side using the functions of the MAC layer and the physical layer. Data and control signals are transmitted between the RLC layer of the UE 100 and the RLC layer of the eNB 200 via a logical channel.
- the PDCP layer performs header compression / decompression and encryption / decryption.
- the RRC layer is defined only in the control plane that handles control signals. Messages for various settings (RRC messages) are transmitted between the RRC layer of the UE 100 and the RRC layer of the eNB 200.
- the RRC layer controls the logical channel, the transport channel, and the physical channel according to establishment, re-establishment, and release of the radio bearer.
- RRC connection When there is a connection (RRC connection) between the RRC of the UE 100 and the RRC of the eNB 200, the UE 100 is in the RRC connected mode (connected mode), and otherwise, the UE 100 is in the RRC idle mode (idle mode).
- the NAS (Non-Access Stratum) layer located above the RRC layer performs session management and mobility management.
- FIG. 3 is a configuration diagram of a radio frame used in the LTE system.
- OFDMA Orthogonal Frequency Division Multiple Access
- SC-FDMA Single Carrier Division Multiple Access
- the radio frame is composed of 10 subframes arranged in the time direction.
- Each subframe is composed of two slots arranged in the time direction.
- the length of each subframe is 1 ms, and the length of each slot is 0.5 ms.
- Each subframe includes a plurality of resource blocks (RB) in the frequency direction and includes a plurality of symbols in the time direction.
- Each resource block includes a plurality of subcarriers in the frequency direction.
- One symbol and one subcarrier constitute one resource element (RE).
- a frequency resource can be specified by a resource block, and a time resource can be specified by a subframe (or slot).
- the section of the first few symbols of each subframe is an area mainly used as a physical downlink control channel (PDCCH) for transmitting a downlink control signal. Details of the PDCCH will be described later.
- the remaining part of each subframe is an area that can be used mainly as a physical downlink shared channel (PDSCH) for transmitting downlink data.
- PDSCH physical downlink shared channel
- both ends in the frequency direction in each subframe are regions used mainly as physical uplink control channels (PUCCH) for transmitting uplink control signals.
- the remaining part of each subframe is an area that can be used as a physical uplink shared channel (PUSCH) mainly for transmitting uplink data.
- PUSCH physical uplink shared channel
- FIG. 4 is a diagram illustrating an operation of the UE 100 that performs the DRX operation in the connected mode.
- FIG. 5 is a diagram illustrating an example of DRX parameters in the connected mode.
- the UE 100 that performs the DRX operation in the connected mode intermittently monitors the PDCCH.
- the period for monitoring the PDCCH is referred to as “DRX cycle”. Further, the monitoring period that occurs every DRX cycle is referred to as an “on period”. “On duration” may be referred to as “wake-up period”.
- the period in which the PDCCH need not be monitored may be referred to as a “sleep period” (or “Opportunity for DRX”).
- Downlink data is transmitted via PDSCH, and scheduling information of PDSCH is included in PDCCH.
- scheduling information of PDSCH is included in PDCCH.
- the UE 100 detects scheduling information via the PDCCH in “On duration”, the UE 100 can receive data specified by the scheduling information.
- the existing DRX cycle includes a short DRX cycle and a long DRX cycle.
- “On duration” is the same, and the length of the sleep period is different.
- “On duration” can be set by “On duration timer” between 1 ms and 200 ms.
- the long DRX cycle (and offset time) is set by “longDRX-CycleStartOffset”, and the short DRX cycle is set by “shortDRX-Cycle”.
- long DRX-CycleStartOffset the long DRX-CycleStartOffset
- the short DRX cycle is set by “shortDRX-Cycle”.
- 3GPP specifications when DRX is set, long DRX is an essential function, and short DRX is an optional function. Therefore, even if the long DRX is set, the short DRX cycle may not be set in the UE 100.
- DRX is controlled based on a plurality of timers as follows.
- the UE 100 activates “drx-InactivityTimer” when receiving new DL data during “On duration”. At the same time, “HARQ RTT Timer” is started. If DL data cannot be decoded correctly, “HARQ RTT Timer” expires and “drx-RetransmissionTimer” is activated at the same time. The UE 100 stops the “drx-RetransmissionTimer” when receiving the retransmission of the DL data and successfully decoding the DL data. Then, when “drx-InactivityTimer” expires, the sleep period starts.
- Active state a state in which “On duration timer”, “drx-InactivityTimer”, and “drx-RetransmissionTimer” are operating are referred to as “Active state”.
- the UE 100 monitors the PDCCH in the “Active state”.
- a DRX operation that is not in the “Active state” is referred to as an “Inactive state”.
- the UE 100 starts from the short DRX, and transitions to the long DRX operation when the period set by the “drxShortCycleTimer” expires.
- the UE 100 activates “drxShortCycleTimer” when the DL data can be correctly decoded.
- the UE 100 receives new data during the operation of “drxShortCycleTimer”
- the UE 100 resumes “drxShortCycleTimer” again when the data can be correctly decoded.
- the state transitions from short DRX to long DRX.
- the state transition is again made from the long DRX to the short DRX.
- the setting information (“On duration”, various timers, long DRX cycle, short DRX cycle, etc.) including each DRX parameter described above is set in the UE 100 by “DRX-Config” which is an information element in the individual RRC message. .
- an extended DRX (extended DRX) cycle longer than the existing DRX cycle is newly introduced.
- the extended DRX cycle has a time length of 2560 subframes or more.
- Extended DRX is defined as an information element different from the existing “DRX-Config”. That is, “DRX-Config-v13xx”, which is extended DRX setting information, is different from “DRX-Config”, which is existing DRX setting information. “DRX-Config-v13xx” may have parameters such as “On duration” and various timers separately from “DRX-Config”.
- the UE 100 in the connected mode performs measurement on the downlink reference signal (CRS: Cell-specific Reference Signal) for each cell based on the measurement setting information (Measurement Config) received from the eNB 200, and the measurement report (Measurement) regarding the measurement result. Report) to the eNB 200.
- the measurement results include reference signal received power (RSRP) and / or reference signal received quality (RSRQ).
- RSRP reference signal received power
- RSRQ reference signal received quality
- the eNB 200 performs mobility control such as handover control based on the measurement report.
- “Measurement Config” is an information element in the individual RRC message. “Measurement Config” includes report setting information (ReportConfig), a measurement target (MeasObject), and a measurement identifier (MeasId). “ReportConfig” is for setting a condition for transmitting “Measurement Report” from the UE 100 to the eNB 200. For example, according to the conditions specified by Event-A3, when the measurement result for the neighboring cell is better than the measurement result for the current serving cell, “Measurement Report” is transmitted. Also, according to the conditions defined by Event-A4, “Measurement Report” is transmitted when the measurement result for the neighboring cell is better than a predetermined threshold.
- “Measurement Report” is transmitted when the measurement result for the current serving cell is equal to or less than a predetermined threshold. Further, according to the conditions defined by “Periodic”, “Measurement Report” is transmitted at a predetermined report cycle by “Measurement Report”. An offset value, a predetermined threshold value, a predetermined reporting cycle, the number of reports, a report condition type, and the like are set by “ReportConfig”.
- “MeasObject” is used to set a frequency and / or RAT (Radio Access Technology) to be measured by the UE 100.
- “MeasId” is used to associate one “ReportConfig” with one “MeasObject”.
- the UE 100 performs measurement on the measurement target specified by “MeasObject” corresponding to “MeasId”, and when the condition specified by “ReportConfig” corresponding to “MeasObject” is satisfied by “MeasId”, “Measurement Report” is transmitted to the eNB 200.
- the UE 100 that performs the DRX operation described above desirably performs measurement only during the on period (or active state), specifically, intra-frequency measurement.
- An “Intra-frequency” measurement is a measurement at the same frequency as the serving cell. In the following, it is assumed that the UE 100 performs “Intra-frequency” measurement only in the ON period (active state).
- the UE 100 may perform “Intra-frequency” measurement in a very long measurement cycle.
- “Intra-frequency” measurement is performed only in the ON period (active state)
- the measurement period becomes the same period as the extended DRX cycle (time length of 2560 subframes or more).
- FIG. 6 is a block diagram illustrating a configuration of the UE 100. As illustrated in FIG. 6, the UE 100 includes a reception unit 110, a transmission unit 120, and a control unit 130.
- the receiving unit 110 performs various types of reception under the control of the control unit 130.
- the receiving unit 110 includes an antenna and a receiver.
- the receiver converts a radio signal received by the antenna into a baseband signal (received signal) and outputs the baseband signal to the control unit 130.
- the transmission unit 120 performs various transmissions under the control of the control unit 130.
- the transmission unit 120 includes an antenna and a transmitter.
- the transmitter converts the baseband signal (transmission signal) output from the control unit 130 into a radio signal and transmits it from the antenna.
- the control unit 130 performs various controls in the UE 100.
- the control unit 130 includes a processor and a memory.
- the memory stores a program executed by the processor and information used for processing by the processor.
- the processor includes a baseband processor that performs modulation / demodulation and encoding / decoding of the baseband signal, and a CPU (Central Processing Unit) that executes various processes by executing programs stored in the memory.
- the processor may include a codec that performs encoding / decoding of an audio / video signal.
- the processor executes various processes described later and various communication protocols described above.
- the control unit 130 when performing the extended DRX operation (the extended DRX operation in the connected mode) in the cell of the eNB 200, the control unit 130 is configured to perform a predetermined measurement cycle based on the “Measurement Config” received from the eNB 200. To measure the downlink reference signal.
- the predetermined measurement period is determined according to a DRX cycle (extended DRX cycle) in the extended DRX operation.
- the predetermined measurement period is a period equivalent to the extended DRX cycle.
- the control unit 130 changes the measurement period to a measurement period shorter than a predetermined measurement period, for example, a measurement period shorter than the extended DRX cycle. That is, the frequency of “Intra-frequency” measurement is increased by changing to a measurement cycle shorter than before the value related to the moving speed of the own UE 100 exceeds the threshold.
- the value related to the moving speed of the own UE 100 is the moving speed obtained using the GPS receiver.
- the acceleration or movement speed obtained using an acceleration sensor may be sufficient.
- the value related to the moving speed of the own UE 100 may be the number of cell transitions per unit time (for example, the number of handovers).
- the threshold value compared with the value regarding the moving speed of the own UE 100 is a threshold value specified by the eNB 200 or a preset threshold value.
- the DRX cycle value may be used as the threshold value.
- the threshold value may be set based on at least one of cell size information indicating the size of a cell (serving cell) and a measurement value obtained by measurement.
- a threshold value is referred to as a “movement speed threshold value”.
- FIG. 7 is a block diagram of the eNB 200. As illustrated in FIG. 7, the eNB 200 includes a transmission unit 210, a reception unit 220, a control unit 230, and a backhaul communication unit 240.
- the transmission unit 210 performs various transmissions under the control of the control unit 230.
- the transmission unit 210 includes an antenna and a transmitter.
- the transmitter converts the baseband signal (transmission signal) output from the control unit 230 into a radio signal and transmits it from the antenna.
- the receiving unit 220 performs various types of reception under the control of the control unit 230.
- the receiving unit 220 includes an antenna and a receiver.
- the receiver converts a radio signal received by the antenna into a baseband signal (received signal) and outputs the baseband signal to the control unit 230.
- the control unit 230 performs various controls in the eNB 200.
- the control unit 230 includes a processor and a memory.
- the memory stores a program executed by the processor and information used for processing by the processor.
- the processor includes a baseband processor that performs modulation / demodulation and encoding / decoding of the baseband signal, and a CPU (Central Processing Unit) that executes various processes by executing programs stored in the memory.
- the processor executes various processes described later and various communication protocols described above.
- the backhaul communication unit 240 is connected to the neighboring eNB 200 via the X2 interface, and is connected to the MME / S-GW 300 via the S1 interface.
- the backhaul communication unit 240 is used for communication performed on the X2 interface, communication performed on the S1 interface, and the like.
- FIG. 8 is a diagram illustrating an operation sequence according to the first embodiment.
- UE100 is in connected mode in the cell of eNB200.
- step S ⁇ b> 10 the transmission unit 210 of the eNB 200 transmits “Measurement Config” to the UE 100.
- the receiving unit 110 of the UE 100 receives “Measurement Config”.
- the control unit 130 of the UE 100 holds “Measurement Config” and starts measurement based on “Measurement Config”.
- step S20 the transmission unit 210 of the eNB 200 transmits the extended DRX setting information (referred to herein as “eDRX Config”) to the UE 100.
- the receiving unit 110 of the UE 100 receives “eDRX Config”.
- the control unit 130 of the UE 100 holds “eDRX Config” and transitions to an extended DRX operation based on “eDRX Config”. Also, the control unit 130 of the UE 100 performs “Intra-frequency” measurement at a predetermined measurement period determined according to the extended DRX cycle.
- Step S20 may be performed before step S10. Or step S10 and step S20 may be performed simultaneously.
- “Measurement Config” and “eDRX Config” may be transmitted to UE 100 by one individual RRC message.
- the individual RRC message may be “RRC Connection Release”.
- step S30 the transmission unit 210 of the eNB 200 transmits threshold information indicating the movement speed threshold to the UE 100.
- the receiving unit 110 of the UE 100 receives threshold information.
- the control unit 130 of the UE 100 sets a moving speed threshold according to the threshold information.
- step S30 is not essential and may be omitted.
- the threshold information may be transmitted by a broadcast RRC message (SIB) as a kind of system information.
- SIB broadcast RRC message
- the threshold information may be transmitted by an individual RRC message.
- the threshold information may be transmitted in step S10 or step S20.
- step S40 the control unit 130 of the UE 100 determines whether or not the value related to the moving speed of the own UE 100 exceeds the moving speed threshold, and detects that the value related to the moving speed of the own UE 100 exceeds the moving speed threshold.
- step S50 the control unit 130 of the UE 100 changes the measurement period to be shorter than a predetermined measurement period determined according to the extended DRX cycle. That is, the control unit 130 of the UE 100 increases the frequency of “Intra-frequency” measurement by changing the measurement period to be shorter than the measurement period before Step S40.
- the control unit 130 of the UE 100 determines whether or not a reporting condition indicating a condition for transmitting “Measurement Report” to the eNB 200 is satisfied.
- the report condition is specified by “ReportConfig” in “Measurement Config”.
- the explanation is made on the assumption that the reporting condition is satisfied.
- step S60 the transmission unit 120 of the UE 100 transmits a scheduling request to the eNB 200 in order to receive an uplink radio resource allocation for transmitting “Measurement Report”.
- the receiving unit 220 of the eNB 200 receives “Scheduling Request”.
- the control unit 130 of the UE 100 stops the extended DRX operation after transmitting “Scheduling Request” to the eNB 200.
- the control unit 130 of the UE 100 may stop the extended DRX operation and make a transition to a predetermined DRX operation having a shorter DRX cycle than the extended DRX operation.
- the predetermined DRX operation is, for example, a long DRX operation or a short DRX operation.
- the control unit 230 of the eNB 200 allocates uplink radio resources to the UE 100 in response to reception of “Scheduling Request”.
- the transmission unit 210 of the eNB 200 transmits scheduling information (UL Grant) indicating the allocated resource to the UE 100.
- the receiving unit 110 of the UE 100 receives “UL Grant”.
- step S ⁇ b> 70 the transmission unit 120 of the UE 100 transmits “Measurement Report” to the eNB 200.
- the receiving unit 220 of the eNB 200 receives “Measurement Report”.
- the control unit 230 of the eNB 200 determines whether or not to hand over the UE 100 to another cell based on “Measurement Report”.
- the description will be made assuming that the UE 100 is determined to be handed over to another cell.
- step S80 the transmission unit 210 of the eNB 200 transmits a handover instruction (Handover Command) to another cell to the UE 100.
- the receiving unit 110 of the UE 100 receives “Handover Command”. Based on “Handover Command”, the control unit 130 of the UE 100 performs handover to another cell.
- the UE 100 that performs the extended DRX operation in the connected mode has a measurement period shorter than a predetermined measurement period (for example, a measurement period shorter than the extended DRX cycle). change.
- the UE 100 changes to a measurement cycle shorter than a predetermined measurement cycle determined according to the extended DRX cycle. That is, the UE 100 performs “Intra-frequency” measurement even in cases other than “On duration” (Active state).
- the UE 100 sets the movement speed threshold based on the threshold information received from the eNB 200. Thereby, a moving speed threshold value can be varied for every eNB200 (or every cell). Therefore, the optimal movement speed threshold value according to the coverage size of eNB200 (or cell) can be set.
- FIG. 9A is a flowchart showing a moving speed determination method 1 according to this modification.
- the moving speed determination method 1 is a method of setting a moving speed threshold based on the DRX cycle.
- step S41A the control unit 130 of the UE 100 sets a handover cycle (Handover cycle) that is a time (average time) elapsed from one handover execution to the next handover execution.
- a handover cycle that is a time (average time) elapsed from one handover execution to the next handover execution.
- “Handover cycle” corresponds to a value related to the moving speed of the UE 100.
- step S42A the control unit 130 of the UE 100 detects that the value related to the moving speed of the own UE 100 has exceeded the moving speed threshold.
- FIG. 9B is a flowchart showing the moving speed determination method 2 according to this modification.
- the moving speed determination method 2 is a method of setting a moving speed threshold based on at least one of cell size information indicating the size of a serving and a measurement value obtained by measurement.
- step S41B the control unit 130 of the UE 100 obtains a value obtained by multiplying the moving speed of the own UE 100 by the currently used DRX cycle (that is, the extended DRX cycle). Compare with moving speed threshold.
- a multiplication value corresponds to the movement distance per 1 DRX cycle.
- the moving speed threshold is set based on the serving size or the measured value (RSRP / RSRQ measured value).
- Cell size information is transmitted from a serving cell, for example.
- a value obtained by multiplying the cell size information by a predetermined coefficient (N) may be used as the movement speed threshold value.
- the distance to the cell edge can be estimated from the RSRP / RSRQ measurement value, and the distance to the cell edge is set as the movement speed threshold value.
- a preset value (X) may be set as the movement speed threshold.
- step S42B the control unit 130 of the UE 100 detects that the value related to the moving speed of the own UE 100 has exceeded the moving speed threshold.
- the measurement cycle can be shortened under the situation where the moving speed of the own UE 100 is considered high considering the currently used DRX cycle.
- the control unit 130 of the UE 100 changes the report condition (ReportConfig) according to the value related to the moving speed of the own UE 100. Specifically, the report condition (ReportConfig) is changed so that the report condition is relaxed and the transmission of “Measurement Report” is accelerated.
- TTT Time To Trigger
- TTT is set short when the moving speed becomes high
- TTT is set long when the moving speed becomes slow.
- the TTT is a duration for which a specific trigger condition (Event condition) is to be satisfied.
- the variable range ( ⁇ ) of the trigger condition may be set from the eNB 200. For example, when TTT ⁇ ⁇ [seconds] specified by “ReportConfig” is set, the UE 100 varies ⁇ [seconds] according to its own moving speed. Alternatively, the eNB 200 may specify the upper limit value or the lower limit value of the trigger condition.
- the control unit 130 of the UE 100 transmits a “Scheduling Request” (step S60 in FIG. 8), and then transmits a special buffer status report to the eNB 200, thereby notifying the eNB 200 of the stop of the extended DRX operation.
- the special buffer status report is, for example, a buffer status report indicating that the buffer amount is zero.
- the receiving unit 220 of the eNB 200 receives a special buffer status report.
- the eNB 200 can grasp that the UE 100 stops the extended DRX operation based on the special buffer status report.
- the UE 100 has transmitted “Scheduling Request” to the eNB 200 (step S60 in FIG. 8).
- a random access preamble may be transmitted to the eNB 200 instead of “Scheduling Request”.
- the state where uplink timing synchronization is not maintained is a state where the time alignment timer has expired, for example.
- ENB200 transmits timing advance to UE100 with uplink scheduling information according to reception of random access preamble.
- UE100 may transmit a connection request message to eNB200 in response to reception of uplink scheduling information.
- the connection request message is, for example, an “RRC Connection Request” message. However, when the RRC connection is maintained, the UE 100 does not transmit the “RRC Connection Request” message.
- the UE 100 may notify the eNB 200 of the stop of the extended DRX operation by transmitting a special connection request message to the eNB 200.
- the special connection request message is, for example, an “RRC Connection Request” message including a flag indicating that the extended DRX operation is stopped (that is, the transition is made to the long DRX operation).
- the UE 100 may transmit a special random access preamble different from the normal random access preamble as a special connection request message.
- the preamble is transmitted using a predetermined sequence (signal sequence) in Msg1 of the random access procedure, it can be shown that the extended DRX is stopped. Or you may notify the information which shows the stop of extended DRX in the information (for example, MAC Control Element) transmitted by Msg3 in a random access procedure.
- RRC Connection Request Request may be used instead of the “RRC Connection Request”.
- the UE 100 includes first DRX configuration information (eDRX-Config) including a first DRX parameter for extended DRX operation, and a second DRX parameter including a second DRX parameter for long DRX operation.
- DRX setting information DRX-Config. The UE 100 applies a combination of a part of the first DRX parameter and a part of the second DRX parameter to the long DRX operation.
- eDRX-Config and DRX-Config are compared and only the DRX parameter that saves power is selected.
- the long DRX cycle in “DRX-Config” is used.
- Such a setting may be valid only for a certain period.
- the certain period may be specified by the eNB 200.
- the UE 100 may continue the extended DRX operation even after transmitting the “Scheduling Request” or the random access preamble to the eNB 200.
- the same method as that of the fifth modification described above may be applied to the extended DRX operation.
- “Intra-frequency” measurement has been mainly described.
- the present invention may be applied to inter-frequency measurement.
- “Measurement Config” includes “gapOffset” for the measurement gap of “Inter-frequency” measurement.
- gp0 is set in “gapOffset”
- the period of the measurement gap is “40 ms”
- the period of the measurement gap is “80 ms”.
- extended DRX it is assumed that a new “gapOffset” is introduced for extended DRX.
- the UE 100 changes to a measurement period shorter than the gap period indicated by “gapOffset” when the value related to the movement speed of the own UE 100 exceeds the movement speed threshold. Thereby, even when the UE 100 performing the extended DRX operation moves, appropriate mobility control can be realized.
- the second embodiment can be applied not only to the DRX operation in the connected mode but also to the DRX operation in the idle mode.
- the DRX cycle may be referred to as a paging cycle.
- the UE 100 that performs the DRX operation in the idle mode intermittently monitors the PDCCH in order to receive the paging message.
- movement of idle mode it is not limited to when eNB200 sets DRX operation
- the UE100 which concerns on 2nd Embodiment stops an extended DRX operation
- a method for obtaining a value related to the moving speed of the UE 100 and a method for setting a threshold are the same as those in the first embodiment.
- the UE 100 may transmit information indicating whether to stop the extended DRX operation to the network.
- the UE 100 may stop the extended DRX operation when a value related to the moving speed of the UE 100 exceeds a threshold value in a situation where the network is asynchronous between cells (Asynchronous deployment).
- the UE 100 acquires information indicating that the network is asynchronous between cells from the network.
- the UE 100 may autonomously determine whether or not the network is asynchronous between cells by measuring the radio signal.
- FIG. 10 is a diagram illustrating an example of an operating environment according to the second embodiment. Here, the DRX operation in the idle mode is assumed.
- the eNB 200-1 manages the cell A
- the eNB 200-2 manages the cell B
- the eNB 200-3 manages the cell C.
- Cells A, B, and C belong to the same tracking area (TA).
- Cells A and B are adjacent and cells B and C are adjacent.
- Cells A, B, and C are asynchronous between cells.
- the SFN (System Frame Number) of the cell B is SFN + 1 of the cell A.
- the SFN of the cell C is SFN + m of the cell A (m ⁇ 2).
- SFN the number of cells in the cell B.
- the cell B does not transmit the paging message until its SFN becomes N again. For this reason, the UE 100 cannot receive the paging message in the cell B for a long time.
- the extended DRX can be a serious problem because the DRX cycle (paging cycle) is very long.
- the UE 100 stops the extended DRX operation when the value related to the moving speed of the UE 100 exceeds the threshold value in a situation where the network is asynchronous between cells.
- the UE 100 may transmit information indicating whether or not to stop the extended DRX operation to the eNB 200 or the MME 300.
- FIG. 11 is a diagram illustrating an example of an operation sequence according to the second embodiment.
- the DRX operation in the idle mode is mainly assumed.
- step S101 when the own cell is asynchronous with another cell, the eNB 200 transmits a notification to that effect (Asynchronous deployment notification) to the UE 100 in the own cell.
- the notification of “Asynchronous deployment” is transmitted by broadcast by SIB (System Information Block).
- SIB System Information Block
- the “Asynchronous deployment” notification may be transmitted to the UE 100 by dedicated RRC signaling or the like.
- the UE 100 Based on the notification of “Asynchronous deployment”, the UE 100 recognizes that the cell (serving cell) that the UE 100 is camping on (“serving cell”) is “Asynchronous deployment”.
- the eNB 200 may transmit an “Asynchronous deployment” notification to the MME 300.
- the UE 100 may autonomously determine whether or not the serving cell is asynchronous with the neighboring cell by performing measurement on the radio signals of the serving cell and the neighboring cell adjacent thereto. For example, the UE 100 determines whether or not the serving cell and the neighboring cell are synchronized based on “systemFrameNumber” included in each of the MIB (Master Information Block) of the serving cell and the neighboring cell, that is, the serving cell is between the neighboring cell. It can be determined whether or not the cells are asynchronous.
- MIB Master Information Block
- step S101 may be omitted.
- step S102 the eNB 200 transmits threshold information indicating a threshold of movement speed (Speed threshold) to the UE 100.
- “Speed threshold” may be a value in which the cell size (distance between sites) is considered. However, when “Speed threshold” is preset in the UE 100, step S102 is not essential and may be omitted.
- step S103 the UE 100 compares the value related to the moving speed of the UE 100 with “Speed threshold”, and determines whether or not the UE 100 is moving at high speed.
- “Speed threshold” the value related to the moving speed of the UE 100 exceeds “Speed threshold”
- the UE 100 determines that it is moving at high speed (YES in step S103), and proceeds to step S104.
- the UE 100 determines that the UE 100 is not moving at high speed (NO in step S103), and executes the process of step S103 again after a certain period. Note that if the UE 100 determines that the UE 100 is not moving at high speed (NO in step S103), the UE 100 may not execute the process of step S103 again.
- step S104 the UE 100 stops (or prohibits) the extended DRX operation. Specifically, the UE 100 does not apply the setting information (that is, invalidates the setting information) even if the UE 100 has the setting information of the extended DRX operation.
- the case where the UE 100 does not apply the extended DRX operation setting information includes the case where the UE 100 is not performing the extended DRX operation.
- the UE 100 may switch from the extended DRX operation to the normal DRX operation when the UE 100 also has the normal DRX operation setting information in addition to the extended DRX operation setting information.
- step S105 the UE 100 transmits a notification (extended DRX stop notification) indicating that the extended DRX operation is stopped to the eNB 200.
- the extended DRX stop notification can also be regarded as a notification indicating that the UE 100 is moving at high speed.
- the eNB 200 that has received such a notification preferably does not set the extended DRX operation in the connected mode in the UE 100.
- the UE 100 may transmit an extended DRX stop notification to the eNB 200 by a “UE Assistance Information” message.
- the eNB 200 may transfer the extended DRX stop notification received from the UE 100 to the MME 300.
- the UE 100 may transmit an extended DRX stop notification to the MME 300 by NAS signaling.
- the MME 300 that has received the “Asynchronous deployment” notification or the extended DRX stop notification does not set the extended DRX by the NAS signaling to the UE 100.
- the operation in which the UE 100 stops the extended DRX operation is illustrated.
- the UE 100 may start the extended DRX operation (that is, enable the setting information of the extended DRX operation).
- the UE 100 may transmit a notification indicating that the extended DRX operation is started to the eNB 200 and / or the MME 300.
- the above embodiment is premised on the case where the UE 100 has the extended DRX operation setting information, but is not limited to this, and the UE 100 does not have the extended DRX operation setting information (the UE 100 has the extended DRX operation setting information).
- the eNB 200 may not notify the UE 100 of the setting information of the extended DRX operation after receiving the extended DRX stop notification from the UE 100.
- the eNB 200 may not notify the UE 100 of the extended DRX configuration information when the cell is asynchronous between cells.
- the condition for the UE 100 to stop the extended DRX operation is that the value related to the moving speed of the UE 100 exceeds the threshold.
- the condition is not limited to this, and the value related to the moving speed of the UE 100 is set to the threshold. Even if it does not exceed, the extended DRX operation may be stopped when the serving cell is asynchronous with the neighboring cell.
- the first embodiment and the second embodiment described above are not limited to the case where they are implemented separately and can be implemented in combination with each other.
- the LTE system is exemplified as the mobile communication system.
- the present invention is not limited to LTE systems.
- the present invention may be applied to a system other than the LTE system.
- TSG-RAN # 67 approved a new work item for RAN enhancement for extended DRX in LTE.
- the purpose of the work item is to provide an extended DRX cycle to the RAN specification for both idle and connected UEs as follows.
- RAN2 Prior to the start of the work item, RAN2 was informed of three issues from SA2 as a result of ongoing related research. It is concluded that RAN2 will respond to UMTS and LTE sessions respectively.
- Problem 2 A method of maintaining a reliability level for enabling paging to be received at a paging opportunity of the UE in the same manner as paging reliability for a normal DRX even when the UE performs cell reselection.
- Maximum response time (or maximum latency time) is studied in SA2 to facilitate 3GPP systems to support various applications of MTC with high latency communication.
- “Maximum latency” is defined as an elapsed time from the time when an AS application transmits DL data to a 3GPP restricted device on an existing IP connection until the device receives the DL data from the viewpoint of the application. From the RAN2 perspective, the maximum response time is equal to the time between the arrival of the page from the MME and the successful reception of DL data at the UE, i.e. it mainly depends on the paging cycle. If synchronous deployment is envisaged, the maximum response time is considered simply a paging cycle.
- SA2 points out concerns about the lack of inter-cell SFN alignment that can occur, for example, in asynchronous deployments.
- the UE may move further to cell C within the paging cycle .
- the response time may be further increased.
- Conditions vary depending on paging cycle, UE speed, network deployment (ie, cell size or ISD, distance between sites), etc. Therefore, RAN2 should discuss whether special conditions should be applicable to eDRX, such as determining whether the UE itself applies a longer DRX cycle depending on the moving speed.
- Proposal 1 For asynchronous deployments with very long paging cycles, excessive response time for idle UEs can be reduced if the UE is allowed to apply special conditions for eDRX.
- WID is described as follows for connected mode.
- the Tidentify_intra requirement is “20 * (DRX Cycle) ”.
- Tidentify_inter for another frequency cell is specified as “20 * Kn * Nfreq, n” [s] for normal performance and “20 * Kr * Nfreq, r” [s] for low performance.
- Proposal 2 As long as the serving cell carefully selects a UE for eDRX, it can guarantee the maximum response time for the connected UE and be equal to the DRX cycle.
- Proposal 3 Maximum response time should take into account delay margins for call setup and QoS control.
- Problem 2 A method of maintaining a reliability level for enabling paging to be received at a paging opportunity of the UE in the same manner as paging reliability for a normal DRX even when the UE performs cell reselection.
- the reliability for receiving paging on the paging occasion may be the same as that of the existing DRX mechanism. Even when cell reselection occurs, synchronous deployment can ensure the same paging reliability as it is now. In asynchronous deployment, reliability can be increased by applying special rules, for example, ensuring that the UE avoids cell reselection during eDRX, since cell reselection between asynchronous cells causes the most serious problems. Can be maintained. As explained in 2.1, reliability also depends on the configured paging cycle, UE speed, and network deployment.
- Proposal 4 RAN2 should discuss whether special rules for eDRX to ensure the reliability of paging reception in asynchronous deployment should be applicable.
- RAN2 should send LS to RAN4 to request analysis of the impact on idle mode UE measurements with eDRX and cell reselection.
- Proposal 5 RAN2 should send LS to RAN4 to request analysis on issue 3.
- the present invention is useful in the communication field.
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Abstract
Description
一つの実施形態に係る無線端末は、移動通信システムにおいて用いられる。前記無線端末は、下りリンク制御チャネルを間欠的に監視する拡張DRX動作がネットワークから設定されている場合、前記無線端末の移動速度に関する値と閾値との比較結果に基づいて、前記拡張DRX動作に関する制御を行う制御部を備える。
(移動通信システム)
以下において、第1実施形態に係る移動通信システムであるLTEシステムについて説明する。図1は、LTEシステムの構成を示す図である。
以下において、コネクティッドモードにおけるDRXについて説明する。図4は、コネクティッドモードのDRX動作を行うUE100の動作を示す図である。図5は、コネクティッドモードにおけるDRXパラメータの一例を示す図である。
・「HARQ RTT Timer」 DLのHARQ再送が行われるまでの最小サブフレーム数
・「drx-RetransmissionTimer」 再送に使用される期間
以下において、コネクティッドモードにおける測定及び測定報告について説明する。
以下において、第1実施形態に係るUE100(無線端末)について説明する。図6は、UE100の構成を示すブロック図である。図6に示すように、UE100は、受信部110、送信部120、及び制御部130を備える。
以下において、第1実施形態に係るeNB200(基地局)の構成について説明する。図7は、eNB200のブロック図である。図7に示すように、eNB200は、送信部210、受信部220、制御部230、及びバックホール通信部240を備える。
以下において、第1実施形態に係る動作シーケンスについて説明する。図8は、第1実施形態に係る動作シーケンスを示す図である。UE100は、eNB200のセルにおいてコネクティッドモードである。
コネクティッドモードの拡張DRX動作を行うUE100は、自UE100の移動速度に関する値が移動速度閾値を超えた場合、所定の測定周期よりも短い測定周期(例えば、拡張DRXサイクルよりも短い測定周期)に変更する。
上述した第1実施形態において、UE100がeNB200から受信した閾値情報に基づいて移動速度閾値を設定し、UE100の移動速度が移動速度閾値を超えるか否かを判定する一例を説明した。
本変更例において、UE100の制御部130は、自UE100の移動速度に関する値に応じて、報告条件(ReportConfig)を変更する。具体的には、報告条件を緩和し、「Measurement Report」の送信が迅速化されるように、報告条件(ReportConfig)を変更する。
本変更例において、UE100の制御部130は、「Scheduling Request」を送信(図8のステップS60)した後、特別なバッファ状態報告をeNB200に送信することにより、拡張DRX動作の停止をeNB200に通知する。特別なバッファ状態報告とは、例えばバッファ量がゼロであることを示すバッファ状態報告である。
上述した第1実施形態において、UE100は、「Scheduling Request」をeNB200に送信していた(図8のステップS60)。しかしながら、上りリンクのタイミング同期が維持されていない状態である場合、「Scheduling Request」に代えて、ランダムアクセスプリアンブルをeNB200に送信してもよい。上りリンクのタイミング同期が維持されていない状態とは、例えばタイムアライメントタイマが満了している状態である。
上述した第1実施形態において、UE100が、「Scheduling Request」をeNB200に送信した後、拡張DRX動作からロングDRX動作に遷移する一例を説明した。
UE100は、「Scheduling Request」又はランダムアクセスプリアンブルをeNB200に送信した後においても、拡張DRX動作を継続してもよい。この場合、上述した変更例5と同様の方法を拡張DRX動作について適用してもよい。
以下において、第2実施形態について、第1実施形態との相違点を主として説明する。上述した第1実施形態において、主としてコネクティッドモードのDRX動作を想定していた。
図10は、第2実施形態に係る動作環境の一例を示す図である。ここでは、アイドルモードのDRX動作を想定する。
図11は、第2実施形態に係る動作シーケンスの一例を示す図である。ここでは、主としてアイドルモードのDRX動作を想定する。
eNB200は、セルがセル間非同期の場合に、拡張DRX設定情報をUE100に通知しなくてもよい。
以下において、上述した実施形態の補足事項について説明する。
TSG-RAN#67で、LTEにおける拡張DRX(extended DRX)のためのRAN強化について新しいワークアイテムが承認された。ワークアイテムの目的は、以下のように、アイドル及びコネクティッドUEの両方のためのRANの仕様に拡張DRXサイクルを提供することを目的としている。
この付記では、3つの問題の分析が提供される。
(2.1. 問題1)
問題1は以下の通りである。
最大応答時間(又は最大レイテンシ時間)は、高レイテンシ通信を伴うMTCの各種アプリケーションをサポートするよう3GPPシステムを円滑化にするためにSA2において研究されている。「最大レイテンシ」は、アプリケーションの観点からは、ASアプリケーションが既存のIP接続上の3GPP拘束デバイスにDLデータを送信した時点から当該デバイスがDLデータを受信するまでの経過時間として定義される。RAN2の観点からは、最大応答時間は、MMEからのページの到着とUEでのDLデータの受信成功との間の時間に等しく、すなわちそれは主にページングサイクルに依存する。同期配備が想定される場合、最大応答時間は単にページングサイクルであると考えられる。
コネクティッドモードについてWIDは以下のように記述する。
アプリケーション層での最大応答時間の取り扱い、おそらく新しい概念であるので、最大応答時間とDRXサイクルとの関係を慎重に検討すべきである。RAN2の観点からは、上位層からのデータ入力と無線インタフェース上のデータの送信/受信との間のレイテンシ、例えば、RACHプロシージャ、RRC接続セットアップ、リソース割り当てなどが考慮されるべきである。よって、RAN2は、無線インタフェース上のレイテンシがDRXサイクルに加えて考慮される必要があることSA2に知らせるべきである。なお、CNノードを介したレイテンシをどのように取り扱うかはRAN2の射程外である。
問題2は、問題1と同じ状況として理解されるが、アイドルモードにのみ適用することができる。
問題3は、以下に引用される。
アイドルモードプロシージャのRAN2の仕様については、ページングサイクルとセル再選択との間の関係はない。その原理はeDRX動作で再利用されることが期待される。よって、インパクトは見られない。
米国仮出願第62/121616号(2015年2月27日出願)及び米国仮出願第62/162204号(2015年5月15日出願)の全内容が参照により本願明細書に組み込まれている。
Claims (22)
- 移動通信システムにおいて用いられる無線端末であって、
下りリンク制御チャネルを間欠的に監視する拡張DRX動作がネットワークから設定されている場合、前記無線端末の移動速度に関する値と閾値との比較結果に基づいて、前記拡張DRX動作に関する制御を行う制御部を備える無線端末。 - 前記制御部は、前記ネットワークから受信した測定設定情報に基づいて、所定の測定周期で下りリンク参照信号に対する測定を行い、
前記制御部は、前記無線端末の移動速度に関する値が前記閾値を超えた場合、前記所定の測定周期よりも短い測定周期に変更する請求項1に記載の無線端末。 - 前記所定の測定周期は、前記拡張DRX動作におけるDRXサイクルに応じて定められる請求項2に記載の無線端末。
- 前記制御部は、前記ネットワークから受信した閾値情報に基づいて、前記閾値を設定する請求項1に記載の無線端末。
- 前記制御部は、前記拡張DRX動作におけるDRXサイクルに基づいて、前記閾値を設定する請求項1に記載の無線端末。
- 前記制御部は、前記セルのサイズを示すセルサイズ情報及び前記測定により得られた測定値の少なくとも1つに基づいて、前記閾値を設定する請求項1に記載の無線端末。
- 前記測定設定情報は、前記ネットワークに対して測定報告を送信する条件を示す報告条件を含み、
前記制御部は、前記無線端末の移動速度に関する値に応じて、前記報告条件を変更する請求項2に記載の無線端末。 - 前記制御部は、前記測定の結果、前記ネットワークに対して測定報告を送信する条件を示す報告条件が満たされた場合、スケジューリング要求又はランダムアクセスプリアンブルを前記ネットワークに送信する請求項2に記載の無線端末。
- 前記制御部は、前記スケジューリング要求又は前記ランダムアクセスプリアンブルを前記ネットワークに送信した後、前記拡張DRX動作を停止する請求項8に記載の無線端末。
- 前記制御部は、前記スケジューリング要求を送信した後、特別なバッファ状態報告を前記ネットワークに送信することにより、前記拡張DRX動作の停止を前記ネットワークに通知する請求項9に記載の無線端末。
- 前記制御部は、前記ランダムアクセスプリアンブルを送信した後、特別な接続要求メッセージを前記ネットワークに送信することにより、前記拡張DRX動作の停止を前記ネットワークに通知する請求項9に記載の無線端末。
- 前記制御部は、前記拡張DRX動作を停止するとともに、前記拡張DRX動作に比べてDRXサイクルが短い所定のDRX動作に遷移する請求項9に記載の無線端末。
- 前記制御部は、前記拡張DRX動作のための第1のDRXパラメータを含む第1のDRX設定情報と、前記所定のDRX動作のための第2のDRXパラメータを含む第2のDRX設定情報と、を有しており、
前記制御部は、前記第1のDRXパラメータの一部と前記第2のDRXパラメータの一部との組み合わせを前記所定のDRX動作に適用する請求項12に記載の無線端末。 - 前記制御部は、前記スケジューリング要求又は前記ランダムアクセスプリアンブルを前記ネットワークに送信した後においても、前記拡張DRX動作を継続する請求項8に記載の無線端末。
- 前記制御部は、前記無線端末の移動速度に関する値が前記閾値を超えた場合、前記拡張DRX動作を停止する請求項1に記載の無線端末。
- 前記制御部は、前記ネットワークがセル間非同期である状況下で、前記無線端末の移動速度に関する値が前記閾値を超えた場合、前記拡張DRX動作を停止する請求項15に記載の無線端末。
- 前記制御部は、前記拡張DRX動作を停止するか否かを示す情報を前記ネットワークに送信する請求項15に記載の無線端末。
- 前記制御部は、前記ネットワークが前記セル間非同期であることを示す情報を前記ネットワークから取得する請求項16に記載の無線端末。
- 前記制御部は、無線信号に対する測定を行うことにより、前記ネットワークが前記セル間非同期であるか否かを自律的に判断する請求項16に記載の無線端末。
- 移動通信システムの無線端末を制御するプロセッサであって、
下りリンク制御チャネルを間欠的に監視する拡張DRX動作がネットワークから設定されている場合、前記無線端末の移動速度に関する値と閾値との比較結果に基づいて、前記拡張DRX動作に関する制御を行うプロセッサ。 - 移動通信システムにおいて用いられる無線端末であって、
下りリンク制御チャネルを間欠的に監視する拡張DRX動作がネットワークから設定されている場合に、前記ネットワークがセル間非同期であると、前記拡張DRX動作を禁止する無線端末。 - 移動通信システムにおいて用いられる無線端末を制御するプロセッサであって、
下りリンク制御チャネルを間欠的に監視する拡張DRX動作がネットワークから設定されている場合に、前記ネットワークがセル間非同期であると、前記拡張DRX動作を禁止するプロセッサ。
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2017082799A1 (en) * | 2015-11-09 | 2017-05-18 | Telefonaktiebolaget Lm Ericsson (Publ) | Measuring multiple carriers under discontinuous activity |
CN110249654A (zh) * | 2018-01-11 | 2019-09-17 | 联发科技股份有限公司 | 执行小区测量的装置及方法 |
JP2022177103A (ja) * | 2018-07-31 | 2022-11-30 | 富士通株式会社 | 基地局、移動局、通信システム、及び通信方法 |
JP7385059B2 (ja) | 2020-04-24 | 2023-11-21 | 維沃移動通信有限公司 | 無線リソース管理測定方法、端末機器とネットワーク機器 |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10321512B2 (en) * | 2012-08-03 | 2019-06-11 | Huawei Device Co., Ltd. | Service control method, terminal, and network device |
US10455468B2 (en) * | 2015-08-14 | 2019-10-22 | Qualcomm Incorporated | Mobility enhancements for high speed scenarios |
WO2017061919A1 (en) * | 2015-10-05 | 2017-04-13 | Telefonaktiebolaget Lm Ericsson (Publ) | Systems and methods for operation under multi-level discontinuous activity configuration |
US10531384B2 (en) | 2016-04-05 | 2020-01-07 | Qualcomm Incorporated | Scheduling request collection after a discontinuous reception period |
WO2018203306A1 (en) * | 2017-05-04 | 2018-11-08 | Nokia Technologies Oy | User equipment measurements upon secondary radio link failure for long term evolution – new radio tight interworking |
US11122399B2 (en) * | 2018-01-12 | 2021-09-14 | Hyundai Motor Company | Method and apparatus for selecting carrier in communication system supporting vehicle to everything communication |
US11956831B2 (en) * | 2018-08-09 | 2024-04-09 | Lg Electronics Inc. | Method and device for transmitting/receiving signal in wireless communication system |
CN110536383B (zh) * | 2019-01-18 | 2024-03-08 | 中兴通讯股份有限公司 | 终端节能方法、基站及终端 |
US11006357B2 (en) * | 2019-06-12 | 2021-05-11 | AT&T Technical Services Company, Inc. | Apparatus and method providing efficient DRX operation for high mobility user equipment over 4G/5G network(s) |
WO2021159277A1 (zh) * | 2020-02-11 | 2021-08-19 | 北京小米移动软件有限公司 | 数据通信方法、装置、通信设备及存储介质 |
CN116709370B (zh) * | 2022-10-27 | 2024-03-08 | 荣耀终端有限公司 | 一种滤波系数调整方法、装置及用户设备 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013201508A (ja) * | 2012-03-23 | 2013-10-03 | Sumitomo Electric Ind Ltd | 無線端末装置、無線基地局装置および通信制御方法 |
JP2014146865A (ja) * | 2013-01-28 | 2014-08-14 | Sharp Corp | 端末装置、基地局装置、通信システム、測定方法および集積回路 |
Family Cites Families (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TR201906705T4 (tr) * | 2007-02-05 | 2019-05-21 | Nec Corp | Baz İstasyon Arası Bir Hücreden Diğer Hücreye Geçiş Yöntemi, Radyo Haberleşme Sistemi, Drx Kontrol Yöntemi, Baz İstasyonu Ve Haberleşme Terminali |
AU2009212717B2 (en) * | 2008-02-01 | 2013-04-04 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | System and method for uplink timing synchronization in conjunction with discontinuous reception |
US8024013B2 (en) | 2008-07-09 | 2011-09-20 | Sony Ericsson Mobile Communications Ab | Regulating power duty cycle of an RF transmitter/receiver responsive to distance moved |
JP5490105B2 (ja) * | 2009-04-20 | 2014-05-14 | パナソニック株式会社 | 無線通信端末装置及び無線通信方法 |
JP5026534B2 (ja) | 2010-01-08 | 2012-09-12 | 株式会社エヌ・ティ・ティ・ドコモ | 移動通信方法、移動局及び無線基地局 |
KR20120099568A (ko) | 2011-01-18 | 2012-09-11 | 삼성전자주식회사 | 무선 통신 시스템에서 단말기 내에 복수 개의 이종 통신 모듈이 있을 경우 간섭을 측정하는 방법 및 장치 |
RU2595784C2 (ru) | 2011-03-31 | 2016-08-27 | Нек Корпорейшн | Радиотерминал, радиостанция, устройство управления и способ управления связью в системе радиосвязи |
EP3522615B1 (en) * | 2011-04-04 | 2020-09-09 | Kyocera Corporation | Mobile communication method and radio terminal |
US20130170415A1 (en) * | 2011-04-04 | 2013-07-04 | Kyocera Corporation | Mobile communication method and radio terminal |
CN102905286B (zh) * | 2011-07-29 | 2017-07-11 | 上海贝尔股份有限公司 | 在用户设备和基站设备中进行drx配置和测量的方法 |
CN102917392B (zh) | 2011-08-05 | 2016-03-09 | 华为技术有限公司 | 小区测量和测量控制的方法及设备 |
US9369960B2 (en) * | 2011-09-08 | 2016-06-14 | Lg Electronics Inc. | Method for operation based on switching discontinuous reception state in wireless communication system and apparatus for the same |
KR20140091697A (ko) * | 2011-10-27 | 2014-07-22 | 삼성전자주식회사 | 이동통신 시스템에서 단말의 전력 소모를 효과적으로 감소시키는 방법 및 장치 |
WO2013093575A1 (en) | 2011-12-23 | 2013-06-27 | Nokia Corporation | Method and apparatus for controllably handing over a mobile terminal to a small cell within a heterogeneous network |
WO2013114155A1 (en) * | 2012-01-30 | 2013-08-08 | Nokia Corporation | Improved mobility with discontinuous reception using mobility state |
EP2810481B1 (en) * | 2012-01-30 | 2017-06-28 | Nokia Solutions and Networks Oy | Mobility improvement using increased number of mobility measurements for a time period |
US9414409B2 (en) * | 2012-02-06 | 2016-08-09 | Samsung Electronics Co., Ltd. | Method and apparatus for transmitting/receiving data on multiple carriers in mobile communication system |
US20150208314A1 (en) * | 2012-08-29 | 2015-07-23 | Telefonica, S.A. | Method for reducing signaling messages and handovers in wireless networks |
US9204395B2 (en) * | 2013-01-15 | 2015-12-01 | Samsung Electronics Co., Ltd. | Apparatus and method for discontinuous receive in communication systems with large number of antennas |
WO2015018081A1 (zh) * | 2013-08-09 | 2015-02-12 | 华为技术有限公司 | 测量方法及装置,信息交互方法及装置,驻留方法及装置技术领域 |
CN107113642B (zh) * | 2015-01-15 | 2020-03-17 | 索尼公司 | 在无线通信系统中操作的终端及其控制方法 |
-
2016
- 2016-02-26 WO PCT/JP2016/055882 patent/WO2016136958A1/ja active Application Filing
- 2016-02-26 US US15/553,087 patent/US10356840B2/en active Active
- 2016-02-26 JP JP2017502517A patent/JP6867942B2/ja active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013201508A (ja) * | 2012-03-23 | 2013-10-03 | Sumitomo Electric Ind Ltd | 無線端末装置、無線基地局装置および通信制御方法 |
JP2014146865A (ja) * | 2013-01-28 | 2014-08-14 | Sharp Corp | 端末装置、基地局装置、通信システム、測定方法および集積回路 |
Non-Patent Citations (1)
Title |
---|
BROADCOM CORPORATION: "Mobility Improvement for Long DRX", 3GPP TSG-RAN WG2 MEETING #85 R2- 140423, 31 January 2014 (2014-01-31), [retrieved on 20160331] * |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2017082799A1 (en) * | 2015-11-09 | 2017-05-18 | Telefonaktiebolaget Lm Ericsson (Publ) | Measuring multiple carriers under discontinuous activity |
US10567991B2 (en) | 2015-11-09 | 2020-02-18 | Telefonaktiebolaget Lm Ericsson (Publ) | Measuring multiple carriers under discontinuous activity |
CN110249654A (zh) * | 2018-01-11 | 2019-09-17 | 联发科技股份有限公司 | 执行小区测量的装置及方法 |
CN110249654B (zh) * | 2018-01-11 | 2023-12-08 | 联发科技股份有限公司 | 执行小区测量的用户设备及方法 |
JP2022177103A (ja) * | 2018-07-31 | 2022-11-30 | 富士通株式会社 | 基地局、移動局、通信システム、及び通信方法 |
JP7385059B2 (ja) | 2020-04-24 | 2023-11-21 | 維沃移動通信有限公司 | 無線リソース管理測定方法、端末機器とネットワーク機器 |
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