WO2013187693A1 - 이동통신 시스템에서 작은 크기의 데이터를 송수신하는 방법 및 장치 - Google Patents
이동통신 시스템에서 작은 크기의 데이터를 송수신하는 방법 및 장치 Download PDFInfo
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- WO2013187693A1 WO2013187693A1 PCT/KR2013/005193 KR2013005193W WO2013187693A1 WO 2013187693 A1 WO2013187693 A1 WO 2013187693A1 KR 2013005193 W KR2013005193 W KR 2013005193W WO 2013187693 A1 WO2013187693 A1 WO 2013187693A1
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- terminal
- state
- base station
- control message
- information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/0205—Traffic management, e.g. flow control or congestion control at the air interface
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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
- H04W52/0235—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a power saving command
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- 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
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
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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 method and apparatus for processing data of small size in a mobile communication system.
- a mobile communication system has been developed for the purpose of providing communication while securing user mobility.
- Such a mobile communication system has reached a stage capable of providing high-speed data communication service as well as voice communication due to the rapid development of technology.
- the present invention provides a method and apparatus for efficiently processing small and intermittently occurring packets.
- a method of changing a state of a terminal comprising: determining a required operating state of the terminal based on at least one parameter; Determining a current operation state based on setting information of the terminal; And transmitting a state change request to a base station if the requested operation state and the current operation state are not the same.
- the state change method according to the present invention is a state change method for a terminal of a base station, when a state change request is received from the terminal, a control message for reconfiguring the connection with the terminal in response to the state change request; Generating; And transmitting the generated control message to the terminal, wherein the state change request is transmitted to the base station if the required operating state of the terminal and the current operating state of the terminal are not the same.
- the terminal according to the present invention, a terminal for performing an operation state change, a transceiver for performing data communication with the base station; And determine a required operating state of the terminal based on at least one parameter, determine a current operating state based on setting information of the terminal, and if the requested operating state and the current operating state are not the same, And a control unit controlling the transceiver to transmit a state change request to a base station.
- the base station for performing a state change for the terminal, the transceiver for performing data communication with the terminal; And when a state change request is received from the terminal through the transceiver, generates a control message for reconfiguring a connection with the terminal in response to the state change request, and transmits the generated control message to the terminal.
- a control unit for controlling a unit, wherein the state change request is transmitted to the base station if the required operating state of the terminal and the current operating state of the terminal are not the same.
- Packet processing method and apparatus in processing a small size and intermittent packet in a mobile communication system, by reducing the signaling overhead to prevent the problem of overloading the network and battery performance of the terminal To improve.
- FIG. 1 is a diagram showing the structure of an LTE system to which the present invention is applied;
- FIG. 2 is a diagram showing a radio protocol structure of an LTE system to which the present invention is applied;
- FIG. 3 is a view showing the overall operation of the first embodiment associated with a state change
- FIG. 4 is a diagram illustrating a terminal operation according to a first embodiment associated with a state change
- FIG. 5 is a view showing the overall operation of the first embodiment related to Stationary information
- FIG. 6 is a view showing the overall operation of the first embodiment related to the DRX cycle change
- FIG. 7 is a diagram illustrating a terminal operation according to a first embodiment associated with a change of a DRX cycle
- FIG. 10 is a diagram illustrating an overall operation of determining a reverse transmission output of a terminal when a COMP measurement set is set.
- FIG. 11 illustrates a first embodiment of a terminal operation for determining a reverse transmission output
- FIG. 12 illustrates a second embodiment of a terminal operation for determining a reverse transmission output
- FIG. 13 illustrates a third embodiment of a terminal operation for determining a reverse transmission output
- 15 is a diagram illustrating a base station apparatus.
- FIG. 1 is a diagram illustrating a structure of an LTE system to which the present invention is applied.
- a radio access network of an LTE system includes a next generation base station (Evolved Node B, hereinafter referred to as 'ENB, Node B' or 'base station') 105, 110, 115, and 120, and a mobile management entity ( Mobility Management Entity (MME) 125 and Serving Gateway (S-GW) 130.
- the ENBs 105, 110, 115, and 120 and the S-GW 130 connect user equipment (hereinafter referred to as UE or UE) 135 to an external network.
- UE user equipment
- the ENBs 105, 110, 115, 120 are connected to the UE 135 by a wireless channel.
- the ENBs 105, 110, 115, and 120 correspond to the Node Bs that constitute the UMTS system, but perform a more complex role than the Node Bs.
- LTE systems for example, service most user traffic over shared channels, including real-time services such as Voice over IP (VoIP) over the Internet Protocol (IP).
- VoIP Voice over IP
- IP Internet Protocol
- an apparatus for collecting and scheduling state information such as a buffer state, an available transmit power state, and a channel state of the UE 135 is required, and ENBs 105, 110, 115, and 120 are in charge of such a device. do.
- the LTE system uses Orthogonal Frequency Division Multiplexing (OFDM) as a radio access technology in a 20 MHz bandwidth to implement a transmission rate of 100 Mbps.
- OFDM Orthogonal Frequency Division Multiplexing
- the UE 135 applies an adaptive modulation & coding (AMC) scheme.
- AMC adaptive modulation & coding
- the AMC scheme is a technique for determining an optimal modulation scheme and channel coding rate for a channel state.
- the S-GW 130 creates or removes data bearers with the external network and the ENBs 105, 110, 115, and 120 under the control of the MME 125.
- the MME 125 is connected with a plurality of MME 125 to perform various control functions in addition to mobility management for the UE 135.
- FIG. 2 is a diagram illustrating a radio protocol structure of an LTE system to which the present invention is applied.
- each of the radio protocols of the UE and ENB constituting the LTE system is a packet data conversion protocol layer (hereinafter referred to as a 'PDCP layer') 205 and 240, and a radio link control layer ( Radio Link Control Layer, hereinafter referred to as 'RLC layer' (210 and 235), Medium Access Control Layer (MAC) (215 and 230) and Physical Layer (hereinafter referred to as 'PHY layer') (220 and 225) Is done.
- Radio Link Control Layer hereinafter referred to as 'RLC layer' (210 and 235)
- MAC Medium Access Control Layer
- 'PHY layer' Physical Layer
- the PDCP layers 205 and 240 are in charge of operations such as IP header compression / restore.
- the RLC layers 210 and 235 reconstruct a PDCP PDU (Packet Data Unit) to an appropriate size to perform an ARQ operation.
- PDCP PDU Packet Data Unit
- the MAC layers 215 and 230 form a connection with various RLC layers and physical layers 220 and 225 constituting one UE.
- the MAC layers 215 and 230 multiplex RLC PDUs provided from the RLC layers to form a MAC PDU, and transfer the configured MAC PDU to the physical layer 220 and 225.
- the MAC layers 215 and 230 demultiplex the MAC PDUs provided from the physical layers 220 and 225 to extract RLC PDUs, and deliver the extracted RLC PDUs to various RLC layers.
- the physical layers 220 and 225 channel-code and modulate higher layer data to generate an OFDM symbol, and transmit the generated OFDM symbol to a wireless channel.
- the physical layers 220 and 225 perform demodulation and channel decoding on OFDM symbols received through a wireless channel and transmit the demodulation and channel decoding to the upper layer.
- the state of the terminal is divided into an idle state and an RRC connection state.
- the terminal in the idle state is unable to transmit and receive data.
- the terminal transitions to the RRC connected state through a predetermined procedure.
- the transition to the RRC connected state causes a control message exchange between the terminal and the base station, a control message exchange between the base station and the MME, and a control message exchange between the MME and the S-GW.
- the terminal in the RRC connection state performs data transmission and reception.
- the base station releases the RRC connection of the terminal.
- the terminal is expected to generate small data intermittently, it is advantageous in terms of signaling load to maintain the RRC connection without releasing it.
- the DRX operation may be summarized as an operation of checking whether a terminal is scheduled for at least a predetermined period every predetermined period, and minimizes battery consumption by turning off the transceiver for a period other than the predetermined period. The longer the DRX cycle is, the more favorable the terminal battery is. However, if it is set too long, the handover performance of the terminal may be adversely affected. Therefore, it is desirable to maintain the RRC connection state only for the terminal satisfying the following conditions.
- the service / application running on the terminal has a property of background traffic in which a small amount of data is intermittently generated.
- the moving speed of the terminal is not fast or is in a stopped state.
- the base station maintains the RRC connection state by applying a setting for minimizing battery consumption for the terminal. For example, the base station may release a channel quality indicator (CQI) report or set a long reporting period, release a SRS (Sounding Reference Signal) transmission or set a long period, and set a long DRX period.
- CQI channel quality indicator
- SRS Sounding Reference Signal
- the length of the DRX cycle is inversely related to handover performance / transmission delay and is proportional to battery efficiency.
- the terminal may prefer to set a long DRX even if the handover fails.
- the states of two terminals are defined as follows.
- Battery saving priority state A state that prioritizes battery saving of the terminal is applied.
- Transmission Delay Priority Status Status that does not apply the priority setting that saves battery power in the terminal
- the terminal sends a 1-bit indicator to the base station to request a state change. For example, if the terminal wants to minimize battery consumption but the current state of the terminal is a transmission delay priority state, or if the terminal wants to minimize transmission delay or handover failure, but the current state is battery saving priority state, the terminal Information for requesting a state change is transmitted to the base station.
- Which setting is a battery saving setting may vary depending on the scheduling strategy or operation policy of the base station. For example, some base stations may consider a DRX cycle of 100 ms or more as a setting for battery saving. On the other hand, for example, another base station may consider a case where the DRX cycle is 500 ms or more and the PUCCH (Physical Uplink Control Channel) cycle is 20 ms or more as a setting for battery saving.
- the UE cannot determine whether the current setting is a setting for battery saving or not, and the base station transmits DRB configuration information or PUCCH configuration information to the terminal and transmits 1 bit information indicating the current state.
- FIG 3 is a view showing the overall operation of the first embodiment associated with a state change.
- the terminal 305 establishes an RRC connection with an arbitrary base station 310 at any time. Thereafter, at any point in time, the terminal 305 determines that the preferred state is the battery saving priority state in which battery saving is considered first (315). Whether or not the battery saving priority state may be determined according to a predetermined criterion. For example, if the remaining battery amount of the terminal 305 is below a certain reference value and the service / application currently running (or scheduled to be driven) is not sensitive to transmission delay, the terminal 305 selects a desirable state as a battery saving priority state. Can be set to '.
- the terminal 305 may set the desired state to the transmission delay priority state.
- the terminal 305 receives a predetermined control message from the base station 310 (320).
- the control message is for configuring DRX, PUCCH or SRS to the terminal 305 and may be an RRC CONNECTION SETUP message or an RRC CONNECTION RECONFIGURATION message.
- the control message includes at least one configuration information of CQI configuration information, SR configuration information, SRS configuration information, and DRX configuration information.
- the terminal 305 determines the current setting state upon receiving the control message. If the control message includes a status indicator, the current status is indicated by the indicator.
- the status indicator is 2-bit information, for example, and may have the following meaning.
- ⁇ Status Indicator 2 Unspecified Status. The current setting does not belong to either of the two states. If a terminal having no special preference receives a 'unspecified state', it does not trigger a state change request. When the terminal having a special preference, the terminal receives the 'unspecified state' triggers a state change request.
- the terminal 305 may determine that the current configuration is a transmission delay priority status.
- the terminal 305 cannot determine the current state and thus does not trigger a state change request (325).
- the terminal 305 determines whether the status change request is requested by determining the current setting status as a "transmission delay priority status". For example, if the desired state of the terminal 305 is a battery saving priority state, the terminal 305 triggers a state change request, and if the desired state of the terminal 305 is not a battery saving priority state, the terminal 305 is a state. It does not trigger a change request.
- the terminal 305 receives an RRC control message containing a status indicator from the base station 310 (330).
- the control message includes at least one configuration information of CQI configuration information, SR configuration information, SRS configuration information, and DRX configuration information.
- the terminal 305 compares the current setting state (ie, the state indicated by the base station 310) with a state (ie, preferred state) desired by the terminal 305, and determines whether to request a state change.
- Table 1 shows the current state of the terminal 305 by the status indicator indicated by the base station 310 and whether or not to request a state change for each case of the desired state desired by the terminal 305. As shown in Table 1, in case of 2, 4, 7, or 8, the UE triggers a state change request.
- the terminal 305 may trigger a state change request even when the state indicator is not included in the received control message and the preferred state is the battery saving priority state.
- the terminal 305 generates an RRC control message containing the state change indicator and transmits the generated RRC control message to the base station 310 (335).
- the control message may include a 1-bit indicator indicating that a state change is necessary or a 1-bit indicator directly indicating a desired state of the terminal 305. That is, the terminal 305 may indicate an indicator indicating one of 'need state change' and 'no state change' or an indicator or one of 'battery saving priority state' and 'transfer delay priority state'. An indicator indicating whether the saving priority state 'is required is stored in the control message.
- the base station 310 requested to change the state information generates and transmits a control message for reconfiguring the RRC connection to correspond to the requested state to the terminal (345).
- the base station 310 may include a status indicator in the control message to notify the terminal 305 that the RRC connection has been changed to a desired state.
- FIG. 4 is a diagram illustrating a terminal operation according to the first embodiment related to a state change.
- step 405 the terminal determines a desired state or a preferred state.
- step 410 the UE receives a predetermined RRC control message.
- the terminal compares the information contained in the RRC control message with the desired state desired by the terminal to determine whether to request a state change. That is, in step 415, the UE checks whether control information indicating a state of a current configuration is stored in the RRC control message. If it is stored, the process proceeds to step 425. Proceeding to step 420 means that the terminal cannot grasp the state of the current configuration and cannot determine whether the current base station supports the present invention. Therefore, the terminal waits until another new RRC control message is received in the corresponding cell or in a new cell.
- step 425 the terminal checks whether the indicated state matches the desired state of the terminal. If there is a match, the UE does not need to transmit a state change request, and the terminal proceeds to step 420 and waits until a new RRC control message is received. If it does not match, go to step 430.
- step 430 the UE generates and transmits an RRC control message containing control information indicating a desired state (or requesting a change to another state) to the base station and proceeds to step 420. If the state indicator of the newly received RRC control message is different from the state desired by the terminal, the terminal retransmits the RRC control message containing the control information. Alternatively, if the state of the terminal by RRC control does not change to a state desired by the terminal until a predetermined time passes after transmitting the RRC control message containing the control information, the terminal receives the RRC control message containing the control information. Resend
- the base station may set a long period of DRX for the terminal with little movement at present, and may shorten the DRX cycle when the terminal starts to move.
- the base station may set a very long period of DRX for the terminal from which mobility is excluded, and do not perform measurement for mobility support.
- the base station reports information related to its mobility to the base station, particularly information indicating whether the terminal is a stationary terminal, so that the base station determines an effective DRX configuration and measurement configuration for the terminal. How to do it.
- FIG. 5 is a diagram illustrating the overall operation of the first embodiment associated with stationary information.
- the terminal 505 and the base station 510 exchange an RRC connection request message 515 and an RRC connection setup message 520 to establish an RRC connection.
- the terminal 505 transmits an RRC connection setup complete message to the base station 510 (525).
- the terminal 505 includes the stationary state information in the message.
- the stationary state information is information on the current mobility of the terminal 505 and may indicate, for example, the following states.
- ⁇ permanently stationary Once installed, such as a metering device, it corresponds to a terminal that no longer moves. Such a terminal always reports permanently stationary status.
- the mobile station determines that there is no movement temporarily when a predetermined condition is met and reports a temporarily stationary state.
- the predetermined condition may be, for example, a case where the terminal does not move more than a predetermined distance in a recent predetermined period.
- the predetermined condition may be a case where the mobility determined by the terminal using the Doppler effect or the like is less than or equal to a certain speed.
- the predetermined condition may be a case where the number of cells moved during a predetermined period is less than or equal to a certain number.
- the predetermined condition may be a case where the terminal moves to the home cell.
- Non-stationary Reported when the mobility of the terminal is above a certain standard.
- ⁇ Cannot be determined Reported when the terminal cannot confirm mobility.
- the base station 510 determines a DRX setting and a measurement setting to be applied to the terminal 505 by referring to a traffic state, a stationary state, etc. of the terminal 505 (530). If the stationary state of the terminal 505 is permanently stationary, the base station 510 sets a long DRX cycle for the terminal 505 and does not perform neighbor cell measurement. If the stationary state of the terminal 505 is temporarily stationary, the base station 510 may set the DRX period to be long for the terminal 505 but perform measurement of neighboring cells in preparation for the terminal 505 to move to another cell. .
- the base station 510 transmits an RRC control message including DRX configuration and measurement configuration information to the terminal 505 (535).
- the terminal 505 transmits a response message to the base station 510 (540).
- the base station 510 may include a status indicator in the RRC control message.
- the terminal 505 may trigger a status change request in consideration of the status indicator, a desirable state determined by the terminal 505, and the like.
- the terminal 505 may perform operations 320 to 345 using an RRC control message including a status indicator.
- the terminal 505 performs a necessary operation according to the set DRX and the measurement. That is, the terminal 505 performs at least one measurement per DRX cycle with respect to a measurement object associated with a measurement ID and manages the measurement result by applying three-layer filtering (L3 filtering). do.
- L3 filtering three-layer filtering
- the stationary state of the terminal 505 may be changed at any time. For example, at any point in time, the stationary state of the terminal 505 may be changed to non-stationary or cannot be determined in a temporary stationary.
- the terminal 505 When the stationary state of the terminal 505 is changed, the terminal 505 generates a control message containing the new stationary state and transmits the control message to the base station 510 (550).
- the base station 510 may update the DRX setting or the measurement setting according to the state of the new terminal 505, and may instruct the terminal 505.
- Terminal 505 which generates only background traffic, is advantageous in terms of signaling load reduction in maintaining an RRC connection even if there is no data transmission / reception for a considerable period of time.
- the base station 510 sets the DRX cycle as long as possible for the terminal 505 so that the terminal 505 can reduce battery consumption.
- the terminal 505 performs the measurement once every DRX cycle and makes a decision related to mobility using a value obtained by applying three-layer filtering to the measurement result. Therefore, setting a long DRX cycle may result in a slow decision speed of the terminal 505 related to mobility.
- the present invention provides the following method to solve the above problem.
- the base station sets two DRX cycles to a given terminal.
- the first DRX cycle is applied when there is no data transmission and reception and the channel condition of the serving cell is good, and is to minimize battery consumption of the terminal.
- the second DRX cycle is applied when there is data transmission or reception or a channel condition of the serving cell is poor, and is to facilitate data transmission or reception and more efficiently support mobility.
- the base station applies the second DRX period to the terminal, and if the second DRX period application condition is not satisfied, the base station applies the first DRX period to the terminal.
- the UE performs measurements on the serving cell and neighbor cells at least once every DRX cycle.
- ⁇ onDuration occurs every DRX cycle.
- the UE monitors the PDCCH for a time period specified by the onDuration.
- the UE transmits CSI / SRS during onDuration when the CSI / SRS transmission condition is satisfied and does not transmit CSI / SRS during onDuration when the CSI / SRS transmission condition is not satisfied.
- the second DRX cycle application condition is as follows.
- ⁇ first condition a condition in which a predetermined condition related to a scheduling situation is satisfied, or
- Second condition 'short DRX cycle automatic change indicator' is indicated and the channel condition of the serving cell is worse than a predetermined criterion.
- a scheduling command (reverse grant or forward assignment) for transmitting and receiving new data within a predetermined period, a predetermined condition related to the scheduling situation is satisfied.
- CSI / SRS transmission conditions are as follows.
- the current onDuration is onDuration according to the second DRX cycle, and the second DRX cycle is applied by satisfying the first condition among the second DRX cycle application conditions.
- the terminal 505 does not transmit CSI / SRS in onDuration where the following conditions are met.
- the current onDuration is onDuration according to the second DRX cycle, the first condition of the second DRX cycle application condition is not satisfied, the second condition is satisfied, and the second DRX cycle is applied.
- And currently onDuration interval is not defined as Active Time by other condition.
- the terminal 505 performs the measurement more frequently by applying the second DRX cycle when the channel condition of the serving cell is less than or equal to a predetermined criterion.
- the terminal 505 since the base station 510 may not know that the terminal 505 is applying the second DRX cycle, the terminal 505 may be allocated a CSI / SRS transmission resource in onDuration determined by the second DRX cycle. Even if it is, CSI / SRS transmission is not performed.
- the first DRX cycle is referred to as a long DRX cycle
- the second DRX cycle is referred to as a short DRX cycle.
- the terms ie onDuration, drxShortCycleTimer, Active Time, etc. are described in specification 36.321.
- FIG. 6 is a diagram illustrating the overall operation of the first embodiment associated with the change of the DRX cycle.
- step 620 base station 1 (the current serving base station of the terminal) transmits an RRC connection reconfiguration message to the terminal.
- the control message includes DRX configuration information, measurement configuration information, and the like. If a very large value is set as the first DRX cycle to minimize battery consumption of the terminal, the base station instructs the terminal to apply a short DRX cycle if the channel condition satisfies a predetermined condition. Information may be additionally provided to the terminal.
- Short DRX cycle automatic change indicator indication information instructing to apply a short DRX cycle if the channel condition of the serving cell is lower than the following criteria.
- ⁇ Short DRX cycle automatic change condition Reference value for RSRP or RSRQ of serving cell. S-measure may be used instead of applying a separate value.
- the UE starts to apply a short DRX cycle when the channel state of the serving cell becomes worse than the above condition. Hereafter referred to as TH1.
- the UE sets DRX and measurement, and performs DRX operation and measurement operation.
- the UE measures the RSRP and RSRQ of the serving cell at least once per DRX cycle. If the channel quality of the serving cell is lower than TH1 for more than a certain period, the terminal proceeds to step 630.
- the channel quality of the serving cell is good, only the scheduling situation is considered in determining the DRX cycle to be applied. That is, the DRX cycle to be applied is determined by considering only whether drxShortCycleTimer is running.
- the UE applies a short DRX cycle, even if a long DRX cycle should be applied according to a scheduling situation. Specifically, the terminal checks whether drxShortCycleTimer is currently running, and if it is running, restarts drxShortCycleTimer. On the other hand, if drxShortCycleTimer is not running, the terminal starts driving drxShortCycleTimer. Thereafter, the terminal checks the channel state of the serving cell before the drxShortCycleTimer expires and determines whether to re-run drxShortCycleTimer. That is, if the channel situation is worse than TH1, the terminal restarts drxShortCycleTimer before the drxShortCycleTimer expires.
- the UE applies the short DRX cycle to perform the measurement. If the predetermined condition is satisfied, for example, if the neighboring cell has a better channel quality than the serving cell by a predetermined offset for a predetermined period, the terminal generates a measurement result control message and transmits it to the base station.
- step 640 the base station determines to hand over the terminal to a cell controlled by the base station 2 with reference to the measurement result reported by the terminal.
- the base station 1 performs a handover preparation procedure with the base station 2.
- the procedure consists of base station 1 sending a HANDOVER REQUEST message to base station 2 and base station 2 sending a HANDOVER REQEUST ACK message to base station 1.
- the base station 1 transmits a control message for commanding handover to the terminal.
- the cell to be handed over is a pico cell
- the base station may instruct the terminal to apply a short DRX cycle regardless of the scheduling situation when the handover is completed.
- This indication may be implemented by including control information in the message, for example, "short DRX cycle automatic change indicator 2".
- the UE receives the indicator through a control message indicating handover, the UE moves to the target cell and performs measurement in a shorter period than a normal period until a predetermined period or a predetermined condition is satisfied.
- the predetermined condition may be, for example, that the channel situation of the new target cell becomes better than the predetermined criterion.
- the predetermined criterion is a criterion different from TH1.
- the control message indicating the handover is an RRC connection reconfiguration message (rrcConnectionReconfiguration) containing mobilityControlInfo (information related to the target cell).
- step 655 the UE acquires forward synchronization of the target cell controlled by the base station 2 and then starts a random access procedure.
- the terminal transmits a random access preamble in the target cell and waits until a random access response message is received.
- step 660 If the UE receives the random access response message from the base station in step 660 and the random access process is successfully completed, the terminal proceeds to step 665 to immediately drive the drxShortCycleTimer and apply a short DRX cycle.
- FIG. 7 is a diagram illustrating a terminal operation according to a first embodiment associated with a DRX cycle change.
- step 705 the UE receives an RRC control message including a short DRX cycle automatic change indicator and other configuration information from the base station.
- the UE performs at least one measurement per DRX cycle according to the DRX configuration and monitors the forward control channel for an active time.
- step 710 the UE compares the channel quality measurement value (F n ) of the serving cell with 3-layer filtering to TH1 with respect to the measurement result performed at least once every DRX cycle.
- F n is a reflection of the n th measurement result, and a filtering coefficient, F n-1 which is the n-1 th measurement result, a current measurement result value, and the like are inputted into a predetermined equation and calculated. Details are given in Specification 36.331. If the Fn of the serving cell is better than TH1, the terminal proceeds to step 715. If F n is worse than TH1, the terminal proceeds to step 725.
- step 715 the UE considers only the scheduling situation without considering the channel state in determining whether to apply a short DRX cycle. That is, if a scheduling command indicating a new transmission is received within a predetermined time, or when a timer driven in association with a scheduling command indicating a new transmission expires, the terminal starts to apply a short DRX cycle.
- the UE transmits CSI / SRS in all onDuration in determining whether to transmit CSI / SRS in onDuration. For example, the UE transmits CSI / SRS while the onDurationTimer starts and is driven without considering whether the onDurationTimer is started by a long DRX cycle or a short DRX cycle.
- step 725 the UE considers the channel situation in determining whether to apply a short DRX cycle. In short, when F n is worse than TH1, the terminal applies a short DRX cycle even if the short DRX cycle is not scheduled.
- the UE transmits CSI / SRS only for onDuration started by a long DRX cycle in determining whether to transmit CSI / SRS during onDuration.
- the UE transmits the CSI / SRS while the onDurationTimer is driven only when the onDurationTimer is started in a subframe in which Equation 1 below is established.
- the UE transmits CSI / SRS only when a predetermined condition is met in onDuration started by a short DRX cycle.
- the UE transmits CSI / SRS when a predetermined condition is satisfied, and otherwise does not transmit CSI / SRS.
- the predetermined condition is, for example, when the onDuration belongs to Active Time for another reason or when the onDuration is started not only by a short DRX cycle but also by a long DRX cycle (that is, a sub that satisfies Equation 1 and Equation 2 simultaneously). If onDuration is started in the frame).
- a base station or a base station control station should collect radio environment information on its cell coverage, and collect the information through a drive test.
- Conventional drive tests have often been cumbersome in that measurement equipment is loaded on a vehicle and repeated measurement tasks are performed for a long time. The measured result is used to set system parameters of each base station or base station control station through an analysis process. Drive testing like this increases wireless network optimization and operating costs.
- MDT Minimization of Drive Test
- the terminal performs radio channel measurement and periodically or when a specific event occurs, immediately transmits the corresponding radio channel measurement information to the base station, or a predetermined time after storing the radio channel measurement information. After passing to the base station.
- the operation of transmitting the radio channel measurement information and other additional information measured by the terminal to the base station is referred to as MDT measurement information report.
- the terminal transmits the channel measurement result to the base station immediately if communication with the base station is possible, or if it is impossible to report immediately, and records it, and reports the MDT measurement information recorded to the base station when communication is possible later. .
- the base station uses the MDT measurement information received from the terminal for cell area optimization.
- the conventional drive test 800 loads the measurement equipment on the vehicle, finds the transliteration region, moves around the service area, and measures the signal state.
- the UE 820 may perform the replacement and may instruct the NMS 805 to perform the MDT.
- the MNS 805 provides necessary configuration information to the EM 810.
- the EM 810 configures the MDT setting and delivers it to the base station 815.
- the base station 815 sends the MDT configuration to the terminal 820 in step 825 and instructs the MDT.
- the terminal 820 collects MDT measurement information.
- the MDT measurement information may include location and time information as well as signal measurement information.
- the collected information is reported to the base station 115 in step 830.
- Base station 815 conveys the collected information to TCE 835.
- TCE 835 is a server that collects MDT measurement information.
- the terminal 820 has GPS location information, GPS information may be used as the location-related information, but GPS may not be utilized indoors.
- the present invention provides a method of estimating the position of the terminal 820 using the WLAN and including the estimated position information in the MDT measurement result when the GPS position information is not available.
- FIG. 9 is a diagram for explaining an MDT related to WLAN information.
- step 905 the MDT server sets up the MDT to the ENB.
- step 910 the ENB selects a terminal to perform the MDT.
- the ENB selects one of the terminals that has agreed to perform the MDT in consideration of the remaining battery amount of the terminal, whether the GPS is driven or the WLAN is driven.
- step 915 the ENB sets up MDT measurement for the selected UE.
- MDT measurement configuration information may include the following.
- AbsoluteTimeInfo Information for determining a time associated with an MDT measurement, eg, a time to perform an MDT measurement.
- ⁇ areaConfiguration Information that specifies the area where MDT measurement is to be performed.
- LoggingInterval Information that specifies how often to perform the MDT measurement.
- ⁇ wlanInfo WLAN related information to be measured together with MDT measurement. Specifically, the following information is included.
- SSID Service Set Identification
- ESSID Extended Service Set Identification
- the terminal stores the configuration information and waits until the RRC connection is released.
- step 920 the base station instructs the terminal to release the RRC connection.
- the UE releases the RRC connection and transitions to the idle state to perform the MDT measurement. More specifically, the terminal performs measurements on the current serving cell and neighbor cells according to the period indicated by loggingInterval and stores the measured values. The terminal also stores the location information together if there is valid location information acquired from GPS / GNSS at that time. If there is valid speed information obtained from GPS / GNSS at the corresponding time point, the terminal stores the speed information together. The presence of valid information means that there is information obtained within a predetermined period of time. If the valid location information does not exist, the terminal checks whether wlanInfo is included in the MDT configuration information, and if so, performs the following operation.
- the terminal is referred to as a logging occasion (logging occasion, the terminal performs MDT measurement and stores the related information.) After that, it checks whether there is valid WLAN location information obtained.
- the valid WLAN location information refers to WLAN measurement information related to the SSID (or ESSID) indicated by wlanInfo among information measured within a predetermined period of time.
- the WLAN measurement information is the MAC address (or BSSID, Basic Service Set Identification) of APs having a received signal strength equal to or greater than a predetermined standard among APs having the SSID or the ESSID, received signal strength information of the APs, and WLANs of the APs. Channel information and the like.
- the terminal may check the address, received signal strength, WLAN channel information, etc. of the associated AP for at least a predetermined period. To save.
- the stored information is stored in association with the MDT measurement result when a predetermined condition is met, and discarded when the predetermined condition is not met.
- the terminal determines that the condition is satisfied when there is no valid GPS / GNSS location information to be associated with the MDT measurement result at any logging time but valid WLAN measurement information exists.
- step 930 the UE transitions to the RRC connection state. More specifically, the UE performs an RRC connection establishment process in the current serving cell. In the RRC connection setup process, the UE reports to the base station that the MDT measurement result exists if the PLMN that currently establishes the RRC connection is the same PLMN as the PLMN that collected the MDT measurement result. In more detail, the terminal includes a logMeasAvailable bit in an RRC connection setup complete message.
- the base station transmits a control message to report the MDT measurement result to the terminal.
- the base station transmits a UEInformationRequest including logMeasReportReq to the terminal.
- step 940 the terminal transmits a control message containing the MDT measurement result to the base station.
- the terminal transmits a UEInformationResponse containing logMeasReport to the base station.
- logMeasReport includes the following information.
- ⁇ absoluteTimeStamp reference time information associated with the MDT measurement.
- the logged MDT measurement result includes information indicating how much time has elapsed since the MDT measurement has been performed from the reference time information.
- LogMeasInfoList Contains MDT measurement result information performed at each logging point.
- the information includes serving cell signal strength information and neighboring cell signal strength information. Since the measurement result information is included for each logging time point, a plurality of MDT measurement result information is stored in the logMeasInfoList.
- WLAN measured result WLAN measurement result information related to the logging point.
- One MDT measurement result may be associated with one-to-one, and the base station or MDT server may estimate the location information of the associated MDT measurement result from the WLAN measurement result information. More specifically, the WLAN measurement result is associated with an AP of a predetermined SSID or ESSID. In the case of the AP installed by the service provider, the service provider recognizes the actual location of the AP, and can accurately estimate the location based on the BSSID and the signal strength of the AP.
- step 945 the base station transmits the MDT measurement results to the MDT server at an appropriate time or when requested by the MDT server.
- a third embodiment of the present invention provides a method and apparatus for configuring a reverse transmission output by a terminal when CoMP (Coordinated Multipoint Transmission and Reception) is set.
- CoMP Coordinatd Multipoint Transmission and Reception
- CoMP is a method in which a terminal transmits and receives signals from multiple nodes.
- the node is also referred to as a transmission point (TP), and the TP is identified by a channel state information reference signal (CSI-RS), see Standards 36.211, 36.212, and 36.213 resources.
- CSI-RS channel state information reference signal
- the present invention provides a method and apparatus for maintaining the transmission output of the terminal at an appropriate level according to the instructions of the base station and the determination of the terminal itself.
- the terminal uses the first scheme or the second scheme in configuring the reverse transmission output.
- the first method is a method of determining the uplink transmission output by reflecting the path loss of the CRS (see Cell Reference Signal, specifications 36.211, 36.212, 36.213) of the serving cell.
- the second method is a method of determining the uplink transmission output by reflecting the CSI-RS path loss of the TP satisfying a predetermined condition.
- the predetermined condition may be as follows.
- the COMP measurement set is a set of configured CSI-RS resources (as described above, a CSI-RS resource may correspond to a TP) and is specified by a CSI-RS resource identifier.
- 10 is a diagram illustrating the overall operation of determining the reverse transmission power of the terminal when the COMP measurement set is set.
- the UE establishes an RRC connection with an arbitrary serving cell, and for example, TP # 0 (1015), TP # 1 (1020), TP # 2 (1025), and TP # in the serving cell area. 3 (1030) is provided.
- step 1035 the base station 1010 transmits a control message for setting a COMP resource management set to the terminal.
- the COMP management set is a set of CSI-RS resources that the UE periodically performs measurement for managing the COMP measurement set.
- the control message includes information such as measConfig.
- CSI-RS resources are set to one measurement object and each CSI-RS resource is specified by a CSI-RS resource identifier. Periodic measurement is performed on the CSI-RS resources, and a measurement result report control message is generated when a predetermined condition is established.
- the predetermined condition may be, for example, a case in which a state in which a measurement result of the received signal strength of at least one CSI-RS resource is greater than or equal to a predetermined reference value lasts longer than or equal to a predetermined reference period.
- the predetermined condition may be a case in which a state in which a measurement result of path loss of at least one CSI-RS resource is greater than or equal to a predetermined reference value lasts more than a predetermined reference period.
- the control message includes CSI-RS configuration information with respect to the measurement object, and the CSI-RS configuration information includes at least one CSI-RS resource information.
- the CSI-RS resource information consists of the following subordinate information.
- ⁇ CSI-RS resource identifier an integer between 0 and 31. Specific to CSI-RS resources.
- ⁇ number of antenna ports the number of antenna ports used to transmit and receive the CSI-RS resource.
- Resource setting information Information related to the number of CSI-RS signals. See specifications 36.211 tables 6.10.5.2-1 and 6.10.5.2-2.
- Subframe Setting Information Information related to the pattern of the subframe in which the CSI-RS signal is transmitted. See Specification 36.211 table 6.10.5.3-1.
- ⁇ CSI-RS Resource Transfer Output Information Information for measuring path loss. Sum of transmit power of antennas when multiple antennas are used (i.e. when there is more than one antenna port).
- CSI-RS #n is defined as meaning a CSI-RS resource having an identifier n.
- the UE When the UE receives a control message indicating a measurement for the CSI-RS resource, the UE performs a predetermined measurement for the CSI-RS, for example, a reference signal received power (RSRP) or a path loss measurement (1040). ).
- RSRP reference signal received power
- the terminal applies three-layer filtering to the measured value and checks whether the filtered result satisfies a predetermined condition.
- the condition may be, for example, a situation in which the RSRP exceeds a predetermined reference value lasts for a predetermined period or a predetermined offset from the CSI-RS resource having the best measured value among the CSI-RS resources belonging to the CSI-RS resource management set. Measurements may result in better or worse CSI-RS resources.
- the UE applies s-Measure differently according to whether the measurement target is E-UTRA frequency or CSI-RS resource. More specifically, in determining whether to measure a certain measurement target, if the measurement target is the E-UTRA frequency, the UE determines to perform measurement only when the channel quality of the serving cell is worse than s-Measure, but the measurement target In this CSI-RS resource, the UE determines to perform measurement even if the channel quality of the serving cell is better than s-Measurement.
- the terminal In operation 1045, if at least one of the CSI-RS resources belonging to the COMP resource management set satisfies a predetermined condition, the terminal generates a measurement result report and transmits the measurement result report to the base station.
- the measurement result report control message stores the identifier of the CSI-RS resource that triggered the measurement result report and the three-layer filtered measurement result.
- the base station determines whether to set the COMP measurement set to the terminal. If the measurement result for at least one CSI-RS resource satisfies a predetermined criterion, the base station may decide to set a COMP measurement set.
- the base station generates an RRC control message containing the control information related to the COMP measurement set and transmits it to the terminal (1055). The following information is stored in the control message.
- An identifier of a CSI-RS resource to be used as a path loss criterion is an identifier of a CSI-RS resource to be used as a path loss criterion
- the COMP set means one of a COMP measurement set and a COMP management set.
- P O_PUSCH_2 This value is different from P O_PUSCH .
- P O_PUSCH is calculated as the sum of two independent parameters while P O_PUSCH_2 is directly signaled as one parameter.
- ReferenceSignalPower2 Forward loss output of the path loss reference CSI-RS resource, which is used for path loss calculation.
- the terminal switches the reverse transmission output setting method from the method 1 to the method 2 based on the time point at which the control message is received.
- the UE starts transmitting the measurement result for the CSI-RS resources designated as the CSI-RS measurement set through the designated resource of the PUCCH.
- the PUCCH transmission output is determined in scheme 2. 3 layer filtering is not applied to the measurement result.
- step 1070 the terminal determines the path loss reference CSI-RS resources according to the instructions of the base station.
- step 1075 the UE triggers a power headroom report (PHR).
- PHR power headroom report
- the PHR is a MAC layer control message containing information about the available transmission output of the terminal, and is triggered when a predetermined condition is met.
- the transmission output determination method is changed from the method 1 to the method 2 or the method 2 to the method 1 (in other words, the path loss measurement target is changed from the CRS of the serving cell to the CSI-RS resource of the predetermined TP or
- the PHR is triggered even if the PHR prohibit timer (prohibitPHR-Timer) is running (1075).
- the terminal when the reverse grant for the new transmission is received, the terminal generates and transmits a PHR (1080).
- the PHR contains the difference value between the maximum transmit power and the required reverse transmit power.
- the reason for triggering the PHR in this situation is that the path loss is likely to change significantly as the path loss measurement target is changed.
- the UE determines a reverse transmission output by applying scheme 2 and performs PUCCH and PUSCH transmission (1085).
- the terminal may leave the area of the COMP measurement set. In this case, the reverse transmission output may be set incorrectly and reverse data transmission may be inefficient.
- the terminal itself falls back to the transmission power determination scheme (method 1).
- the UE recognizes a predetermined fallback condition and continuously monitors whether the condition is satisfied while applying the method 2 to the transmission output determination method.
- the fallback condition may be, for example, as follows.
- the path loss of the serving cell CRS is less than the path loss of the path loss reference CSI-RS resource.
- the terminal changes the transmission output determination method to the method 1 and generates a fallback report control message (1097).
- the terminal transmits the fallback report control message to a base station (1098). The following information is stored in the fallback report control message.
- the measurement result is a three-layer filtering applied.
- the UE considers the following factors in determining the reverse transmission power.
- Maximum transmit power The maximum transmit power that can be used by the terminal determined for each serving cell. The value is determined according to the physical characteristics of the terminal and the situation of the serving cell.
- Request transmission output Transmission output required for the terminal to perform reverse transmission. It is determined by the following factors.
- ⁇ Transmission Format Channel coding and modulation scheme applied. Only for PUSCH transmit power determination
- ⁇ PUCCH format Type and format of PUCCH. Different values are applied according to the type of control information such as HARQ feedback and CSI. Only for PUCCH transmit power determination.
- Transmission bandwidth Number of physical resource blocks (PRBs). Only for PUSCH transmit power determination.
- PRBs Physical resource blocks
- the TPC is a value provided through a scheduling command (reverse grant or forward assignment) and may indicate, for example, a 1 dB increase or a 1 dB decrease.
- the UE initializes to 0 when it switches from the scheme 1 to the scheme 2. Performing random access in the serving cell is initialized to zero.
- Offset 3 indicated separately in the control message indicating the transition to scheme 2.
- the terminal calculates the request transmission output by substituting the above factors into a predetermined formula and determines a lower value of the request transmission output and the maximum transmission output as the transmission output.
- the UE considers the following factors in determining the reverse transmission power.
- Maximum transmit power The maximum transmit power that can be used by the terminal determined for each serving cell. The value is determined according to the physical characteristics of the terminal and the situation of the serving cell. The maximum transmit power is the same value as used in scheme 1.
- Request transmission output Transmission output required for the terminal to perform reverse transmission. It is determined by the following factors.
- ⁇ Transmission Format Channel coding and modulation scheme applied. Only for PUSCH transmit power determination. The same one used in Method 1.
- ⁇ PUCCH format Type and format of PUCCH. Different values are applied according to the type of control information such as HARQ feedback and CSI. Only for PUCCH transmit power determination. The same one used in Method 1.
- Transmission bandwidth Number of physical resource blocks (PRBs). Only for PUSCH transmit power determination. The same one used in Method 1.
- the TPC is a value provided through a scheduling command (reverse grant or forward assignment) and may indicate, for example, a 1 dB increase or a 1 dB decrease.
- Offset Sum of Offset 1 provided as system information of the corresponding serving cell and Offset 2 provided through a predetermined control message.
- the terminal calculates the request transmission output by substituting the above factors into a predetermined formula and determines the minimum value between the request transmission output and the maximum transmission output as the transmission output.
- FIG. 11 is a diagram illustrating a first embodiment of a terminal operation for determining a reverse transmission output.
- the terminal that determines the reverse transmission output by applying the scheme 1 receives an arbitrary RRC control message in step 1105.
- the terminal checks whether the control message includes information indicating application of the scheme 2. If the control message includes control information related to the scheme 2, the terminal determines that the scheme 2 application is instructed. If the control message does not include the information indicating to apply the method 2, the terminal proceeds to step 1115, and if the control message includes the information indicating to apply the method 2, the terminal proceeds to step 1120.
- step 1115 the UE continuously applies the method 1 to determining the reverse transmission power.
- step 1120 the UE waits until all current PUSCH transmissions are completed, that is, until the CURRENT_TX_NB (see specification 36.321) of all HARQ processes currently undergoing reverse transmission becomes a predetermined reference value, and then the current TCP accumulated value.
- the terminal switches the reverse transmission output determination method to the method 2.
- FIG. 12 illustrates a second embodiment of a terminal operation for determining a reverse transmission output.
- the terminal that determines the uplink transmission output by applying the scheme 2 receives an arbitrary RRC control message in step 1205.
- step 1210 the UE checks whether the control message includes a command to release all COMP measurement sets, that is, a command to release all PUCCH resources for reporting a measurement result for the CSI-RS resource. If the control message includes a release command, the terminal proceeds to step 1220, and if the release command does not include, the terminal proceeds to step 1215.
- the UE proceeds to step 1215 continues to apply the method 2 to determining the reverse transmission output.
- step 1220 the UE waits until all current PUSCH transmissions are completed, that is, until CURRENT_TX_NB (see standard 36.321) of all HARQ processes currently performing reverse transmission becomes a predetermined reference value. After that, if the previous serving cell that used the scheme 1 is the current serving cell (that is, if no handover occurs while returning to the scheme 1), the UE initializes the TCP accumulated value to the TPC accumulated value applied in the previous scheme 1. In step 1225, the UE switches the reverse transmission output determination method to the method 1.
- FIG. 13 is a diagram illustrating a third embodiment of a terminal operation for determining a reverse transmission output.
- the UE recognizes the need for backward transmission in the near future. For example, when the UE receives a reverse grant, when a reverse grant is set, when a HARQ retransmission is required at a near point, when a PUCCH transmission is required at a near point or when a PUSCH transmission is required, the UE recognizes that backward transmission is required.
- the UE determines a reverse transmission output determination method. If the method 1 is applied to determine the reverse transmission power, the terminal proceeds to step 1315 and if the method 2 is applied, the terminal proceeds to step 1320.
- the UE proceeds to step 1315 to determine the uplink transmission output using the path loss of the serving cell CRS.
- step 1320 the UE determines whether the uplink transmission is a PUCCH transmission, a PUSCH transmission, or an SRS transmission. If the reverse transmission is a PUCCH transmission, the terminal proceeds to step 1315 and if the PUSCH transmission or SRS transmission proceeds to step 1325.
- step 1325 the UE determines the uplink transmission output using the path loss of the CSI-RS resource determined by a predetermined rule.
- FIG. 14 is a diagram illustrating a terminal device.
- the terminal device includes a multiplexing and demultiplexing unit 1415, a control message processing unit 1430, and various upper layer processing units 1420 and 1425.
- the transceiver 1405 receives data and a predetermined control signal through a downlink channel of a serving cell and transmits data and a predetermined control signal through an uplink channel. When a plurality of serving cells are set, the transceiver 1405 performs data transmission and reception and control signal transmission and reception through the plurality of serving cells.
- the multiplexing and demultiplexing unit 1415 multiplexes data generated by the upper layer processing units 1420 and 1425 or the control message processing unit 1430 or demultiplexes the data received by the transmitting and receiving unit 1405 so that an appropriate upper layer processing unit 1420, 1425 or the control message processor 1430.
- the control message processing unit 1430 is an RRC layer device and processes the control message received from the base station and takes necessary actions. For example, the RRC control message is received and the COMP measurement set related information is transmitted to the controller.
- the higher layer processing units 1420 and 1425 may be configured for each service. Data generated from user services such as FTP (File Transfer Protocol) or Voice over Internet Protocol (VoIP) is processed and transmitted to the multiplexing and demultiplexing unit 1415 or the data transmitted from the multiplexing and demultiplexing unit 1415 is transferred. Process it and pass it to the higher-level service application.
- FTP File Transfer Protocol
- VoIP Voice over Internet Protocol
- the controller 1410 checks scheduling commands received through the transceiver 1405, for example, reverse grants, and the transceiver 1405 and the multiplexing and demultiplexing unit 1415 to perform reverse transmission on the appropriate transmission resource at an appropriate time. ). In addition, the controller 1410 manages all procedures related to the status change instruction, all procedures related to the stationary information, all procedures related to the DRX change, all procedures related to the MDT, and all related to the COMP.
- 15 is a diagram illustrating a base station apparatus.
- the base station apparatus includes a transceiver 1505, a controller 1510, a multiplexing and demultiplexing unit 1520, a control message processor 1535, various upper layer processors 1525 and 1530, and a scheduler 1515.
- the transceiver 1505 transmits data and a predetermined control signal through a forward carrier and receives data and a predetermined control signal through a reverse carrier. When a plurality of carriers are set, the transceiver 1505 performs data transmission and control signal transmission and reception to the plurality of carriers.
- the multiplexing and demultiplexing unit 1520 may multiplex the data generated by the upper layer processing units 1525 and 1530 or the control message processing unit 1535, or demultiplex the data received by the transmitting and receiving unit 1505 to provide an appropriate upper layer processing unit 1525. 1530, the control message processor 1535, or the controller 1510.
- the control message processing unit 1535 processes the control message transmitted by the terminal to take necessary actions, or generates a control message to be transmitted to the terminal and delivers it to the lower layer.
- the upper layer processing units 1525 and 1530 may be configured for each bearer, and the data transmitted from the S-GW or another base station may be configured as an RLC PDU and transmitted to the multiplexing and demultiplexing unit 1520 or the multiplexing and demultiplexing unit 1520 RLC PDU delivered from the C-PW) is configured as a PDCP SDU and transmitted to the S-GW or another base station.
- the scheduler 1515 allocates a transmission resource to the terminal at an appropriate time in consideration of the buffer state, the channel state, etc. of the terminal, and allows the transceiver 1505 to process a signal transmitted by the terminal or transmit a signal to the terminal. .
- the controller 1510 manages all procedures related to the status change instruction, all procedures related to the stationary information, all procedures related to the DRX change, all procedures related to the MDT, and all related to the COMP.
Abstract
Description
기지국이 지시한 상태 지시자 | 바람직한 상태 | 상태 변경 요청 | |
경우 1 | 전송 지연 우선 상태 | 전송 지연 우선 상태 | no |
경우 2 | 전송 지연 우선 상태 | 배터리 절약 우선 상태 | yes(지시자=1) |
경우 3 | 전송 지연 우선 상태 | 미특정 상태 | no |
경우 4 | 배터리 절약 우선 상태 | 전송 지연 우선 상태 | yes(지시자=0) |
경우 5 | 배터리 절약 우선 상태 | 배터리 절약 우선 상태 | no |
경우 6 | 배터리 절약 우선 상태 | 미특정 상태 | no |
경우 7 | 미특정 상태 | 전송 지연 우선 상태 | yes(지시자=0) |
경우 8 | 미특정 상태 | 배터리 절약 우선 상태 | yes(지시자=1) |
경우 9 | 미특정 상태 | 미특정 상태 | no |
Claims (20)
- 단말의 상태 변경 방법으로,적어도 하나의 파라미터를 기초로 단말의 요구되는 동작 상태를 판단하는 단계;상기 단말의 설정 정보를 기초로 현재 동작 상태를 판단하는 단계; 및상기 요구되는 동작 상태와 상기 현재 동작 상태가 동일하지 않으면, 기지국으로 상태 변경 요청을 전송하는 단계를 포함하는 것을 특징으로 하는 상태 변경 방법.
- 제1항에 있어서, 상기 동작 상태는,배터리 절약 우선 상태, 전송 지연 우선 상태, 미특정 상태를 포함하는 것을 특징으로 하는 상태 변경 방법.
- 제1항에 있어서, 상기 적어도 하나의 파라미터는,상기 단말의 배터리 잔량, 현재 구동 중인 애플리케이션의 전송 지연 민감도 중 적어도 하나를 포함하는 것을 특징으로 하는 상태 변경 방법.
- 제1항에 있어서, 현재 동작 상태를 판단하는 단계는,상기 기지국으로부터 제어 메시지를 수신하는 단계;상기 제어 메시지에 상태 지시자가 포함되어 있는지 판단하는 단계; 및상기 상태 지시자 포함 여부 및 상기 상태 지시자를 기초로 상기 현재 동작 상태를 판단하는 단계를 포함하는 것을 특징으로 하는 상태 변경 방법.
- 제1항에 있어서, 상기 단말의 설정 상태는,CQI 설정, SR 설정, SRS 설정, DRX 설정 중 적어도 하나에 대한 설정 상태를 포함하는 것을 특징으로 하는 상태 변경 방법.
- 제1항에 있어서, 상기 상태 변경 요청은,상태 변경 필요 여부를 지시하는 지시자, 상기 요구되는 동작 상태를 지시하는 지시자 중 적어도 하나를 포함하는 것을 특징으로 하는 상태 변경 방법.
- 기지국의 단말에 대한 상태 변경 방법으로,상기 단말로부터 상태 변경 요청이 수신되면, 상기 상태 변경 요청에 대응하여 상기 단말과의 연결을 재구성하기 위한 제어 메시지를 생성하는 단계; 및상기 생성된 제어 메시지를 상기 단말로 전송하는 단계를 포함하되,상기 상태 변경 요청은,상기 단말의 요구되는 동작 상태와 상기 단말의 현재 동작 상태가 동일하지 않으면 상기 기지국으로 전송되는 것을 특징으로 하는 상태 변경 방법.
- 제7항에 있어서,상기 단말로 상기 단말의 설정 정보를 포함하는 제어 메시지를 전송하는 단계를 더 포함하되,상기 단말의 설정 정보는,상기 단말의 현재 동작 상태를 지시하는 지시자를 포함하는 것을 특징으로 하는 상태 변경 방법.
- 제7항에 있어서, 상기 상태 변경 요청은,상태 변경 필요 여부를 지시하는 지시자, 상기 단말의 요구되는 동작 상태를 지시하는 지시자 중 적어도 하나를 포함하는 것을 특징으로 하는 상태 변경 방법.
- 제7항에 있어서, 상기 동작 상태는,배터리 절약 우선 상태, 전송 지연 우선 상태, 미특정 상태를 포함하는 것을 특징으로 하는 상태 변경 방법.
- 동작 상태 변경을 수행하는 단말로,기지국과 데이터 통신을 수행하는 송수신부; 및적어도 하나의 파라미터를 기초로 상기 단말의 요구되는 동작 상태를 판단하고, 상기 단말의 설정 정보를 기초로 현재 동작 상태를 판단하고, 상기 요구되는 동작 상태와 상기 현재 동작 상태가 동일하지 않으면, 상기 기지국으로 상태 변경 요청을 전송하도록 상기 송수신부를 제어하는 제어부를 포함하는 것을 특징으로 하는 단말.
- 제11항에 있어서, 상기 동작 상태는,배터리 절약 우선 상태, 전송 지연 우선 상태, 미특정 상태를 포함하는 것을 특징으로 하는 단말.
- 제11항에 있어서, 상기 적어도 하나의 파라미터는,상기 단말의 배터리 잔량, 현재 구동 중인 애플리케이션의 전송 지연 민감도 중 적어도 하나를 포함하는 것을 특징으로 하는 단말.
- 제11항에 있어서, 상기 제어부는,상기 송수신부를 통하여 상기 기지국으로부터 제어 메시지가 수신되면, 상기 제어 메시지에 상태 지시자가 포함되어 있는지 판단하고, 상기 상태 지시자 포함 여부 및 상기 상태 지시자를 기초로 상기 현재 동작 상태를 판단하는 것을 특징으로 하는 단말.
- 제11항에 있어서, 상기 단말의 설정 상태는,CQI 설정, SR 설정, SRS 설정, DRX 설정 중 적어도 하나에 대한 설정 상태를 포함하는 것을 특징으로 하는 단말.
- 제11항에 있어서, 상기 상태 변경 요청은,상태 변경 필요 여부를 지시하는 지시자, 상기 요구되는 동작 상태를 지시하는 지시자 중 적어도 하나를 포함하는 것을 특징으로 하는 단말.
- 단말에 대한 상태 변경을 수행하는 기지국으로,상기 단말과 데이터 통신을 수행하는 송수신부; 및상기 송수신부를 통하여 상기 단말로부터 상태 변경 요청이 수신되면, 상기 상태 변경 요청에 대응하여 상기 단말과의 연결을 재구성하기 위한 제어 메시지를 생성하고, 상기 생성된 제어 메시지를 상기 단말로 전송하도록 상기 송수신부를 제어하는 제어부를 포함하되,상기 상태 변경 요청은,상기 단말의 요구되는 동작 상태와 상기 단말의 현재 동작 상태가 동일하지 않으면 상기 기지국으로 전송되는 것을 특징으로 하는 기지국.
- 제17항에 있어서, 상기 제어부는,상기 단말로 상기 단말의 설정 정보를 포함하는 제어 메시지를 전송하도록 상기 송수신부를 제어하고,상기 단말의 설정 정보는,상기 단말의 현재 동작 상태를 지시하는 지시자를 포함하는 것을 특징으로 하는 기지국.
- 제17항에 있어서, 상기 상태 변경 요청은,상태 변경 필요 여부를 지시하는 지시자, 상기 단말의 요구되는 동작 상태를 지시하는 지시자 중 적어도 하나를 포함하는 것을 특징으로 하는 기지국.
- 제17항에 있어서, 상기 동작 상태는,배터리 절약 우선 상태, 전송 지연 우선 상태, 미특정 상태를 포함하는 것을 특징으로 하는 기지국.
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KR20120052179A (ko) * | 2010-11-15 | 2012-05-23 | 삼성전자주식회사 | 이동통신 시스템에서 단말의 전력 소모를 최적화하는 방법 및 장치 |
Cited By (6)
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JP2016535466A (ja) * | 2013-04-15 | 2016-11-10 | インターデイジタル パテント ホールディングス インコーポレイテッド | ミリ波(mmw)デュアル接続のための不連続受信(drx)方式 |
US9801232B2 (en) | 2013-04-15 | 2017-10-24 | Idac Holdings, Inc. | Discontinuous reception (DRX) schemes for millimeter wavelength (MMW) dual connectivity |
US10462774B2 (en) | 2013-04-15 | 2019-10-29 | Idac Holdings, Inc. | Discontinuous reception (DRX) schemes for millimeter wavelength (MMW) dual connectivity |
JP2017513320A (ja) * | 2014-03-14 | 2017-05-25 | インテル アイピー コーポレイション | デバイスモビリティに基づきセル測定を変更するデバイス及び方法 |
WO2015170943A1 (ko) * | 2014-05-09 | 2015-11-12 | 삼성전자 주식회사 | 이동 통신 시스템에서 네트워크가 mbms 관련 측정 정보를 기록하고 보고할 단말기를 선정하여 설정하고, 단말기가 기록된 정보를 기지국에 보고하는 방법 및 장치 |
JP2017535982A (ja) * | 2014-09-30 | 2017-11-30 | ホアウェイ・テクノロジーズ・カンパニー・リミテッド | 端末、基地局、システムおよび通知方法 |
Also Published As
Publication number | Publication date |
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JP6261571B2 (ja) | 2018-01-17 |
US20150163745A1 (en) | 2015-06-11 |
KR20150021490A (ko) | 2015-03-02 |
EP2860883B1 (en) | 2019-08-14 |
EP2860883A1 (en) | 2015-04-15 |
EP2860883A4 (en) | 2016-01-06 |
JP2015519854A (ja) | 2015-07-09 |
CN104604158B (zh) | 2018-05-18 |
CN104604158A (zh) | 2015-05-06 |
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