WO2013111997A1 - 무선 통신 시스템에서 보고 방법 및 이를 지원하는 장치 - Google Patents
무선 통신 시스템에서 보고 방법 및 이를 지원하는 장치 Download PDFInfo
- Publication number
- WO2013111997A1 WO2013111997A1 PCT/KR2013/000622 KR2013000622W WO2013111997A1 WO 2013111997 A1 WO2013111997 A1 WO 2013111997A1 KR 2013000622 W KR2013000622 W KR 2013000622W WO 2013111997 A1 WO2013111997 A1 WO 2013111997A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- report
- terminal
- measurement
- cell
- network
- Prior art date
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0079—Transmission or use of information for re-establishing the radio link in case of hand-off failure or rejection
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/18—Selecting a network or a communication service
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
Definitions
- the present invention relates to wireless communication, and more particularly, to a reporting method and a device supporting the same in a wireless communication system.
- 3GPP LTE long term evolution
- UMTS Universal Mobile Telecommunications System
- 3GPP LTE uses orthogonal frequency division multiple access (OFDMA) in downlink and single carrier-frequency division multiple access (SC-FDMA) in uplink.
- OFDMA orthogonal frequency division multiple access
- SC-FDMA single carrier-frequency division multiple access
- MIMO multiple input multiple output
- LTE-A 3GPP LTE-Advanced
- the terminal performs measurement on the radio resource and reports the measurement result to the network.
- the network can operate to optimize network performance based on the measurement results. Meanwhile, the terminal may report the location information related to the measurement together with the measurement result to the network.
- the network can perform network parameter optimization that can affect performance degradation through location information related to the measurement results.
- MDT Minimization of Driving Tests
- MDTs can be divided into logged MDTs and immediate MDTs.
- the terminal transmits a logged measurement to the network at a specific time after performing the MDT measurement.
- the terminal performs the MDT measurement and then delivers the logged measurement to the network when the reporting condition is satisfied.
- the logging of the measurement result in the logged MDT may be limited to logging the measurement result according to the measurement performed in the RRC idle mode. It is also possible that the measured measurements are used in RRC connected mode according to the instructions of the network.
- the UE may perform the MDT measurement in the RRC connected mode.
- Obtaining location information by the terminal requires additional battery consumption.
- power efficiency of a terminal is one of very important factors in the performance of the terminal. Unnecessary battery consumption due to excessive position measurement may cause performance degradation of the terminal. Therefore, it is required to propose a more efficient method of reporting measurement results and location information.
- the technical problem to be solved by the present invention is to provide a reporting method and a device supporting the same in a wireless communication system.
- a reporting method performed by a terminal in a wireless communication system obtains a measurement result, attempts to obtain location information associated with the measurement result, determines whether a measurement result reporting condition is satisfied, starts a delay timer, and determines the location of the location information before expiration of the delay timer.
- the method may include transmitting a report message including the measurement result and the acquired location information to the network.
- the method may further include sending a report message to the network that the measurement result is included if the location information is not obtained before the delay timer expires.
- the report message may further include information related to the reason for not obtaining the location information.
- the method may further include information indicating a positioning technique based on obtaining the location information when the acquisition of the location information is completed before the delay timer expires.
- the method detects a Radio Link Failure (RLF) occurrence, reports to the network that the RLF report is valid according to the RLF occurrence, and network a RLF (Radio Link Failure) report request message requesting to report the RLF report. It may further comprise receiving from.
- the report message may be an RLF report message corresponding to the RLF report request message.
- Determining whether the measurement result report condition is satisfied may include determining that the RLF report request message is satisfied when the RLF report request message is received.
- the delay timer may be a value preset in the terminal.
- the delay timer may be started upon detecting the RLF.
- the method may further comprise receiving a measurement report setup message.
- the measurement report setting message may include delay report indication information indicating that the report message is allowed to be transmitted within a specific time period from when the measurement result report condition is satisfied.
- the specific period may be a driving duration of the delay timer.
- the delay timer may be started when the measurement result report condition is satisfied.
- the measurement report setting message may include delay timer setting information indicating a setting value of the delay timer.
- a wireless device operating in a wireless communication system includes a radio frequency (RF) unit for transmitting and receiving a radio signal and a processor operatively coupled to the RF unit.
- the processor acquires a measurement result, attempts to obtain location information related to the measurement result, determines whether a measurement result report condition is satisfied, starts a delay timer, and before the delay timer expires, When the acquisition is completed, a report message including the measurement result and the acquired location information is set to be transmitted to the network.
- RF radio frequency
- the terminal can minimize the power consumed to obtain the location information, and at the same time can expand the opportunity to transmit the measurement results and the associated location information in the measurement result report message. Therefore, the network can easily obtain not only the measurement result but also location information related thereto, and can improve network performance based on the measurement result. In addition, the terminal may improve battery efficiency in the measurement result report.
- FIG. 1 shows a wireless communication system to which the present invention is applied.
- FIG. 2 is a block diagram illustrating a radio protocol architecture for a user plane.
- FIG. 3 is a block diagram illustrating a radio protocol structure for a control plane.
- FIG. 4 is a flowchart illustrating an operation of a terminal in an RRC idle state.
- FIG. 5 is a flowchart illustrating a process of establishing an RRC connection.
- FIG. 6 is a flowchart illustrating a RRC connection resetting process.
- FIG. 7 is a diagram illustrating a RRC connection reestablishment procedure.
- FIG. 8 is a flowchart illustrating a method of performing a logged MDT.
- FIG. 9 is a diagram illustrating an example of a logged MDT according to a logging region.
- FIG. 10 is a diagram illustrating an example of a logged MDT according to a RAT change.
- 11 is a diagram illustrating an example of logged measurements.
- 12 is a diagram illustrating an example of an immediate MDT.
- FIG. 13 is a diagram illustrating an example of a structure of a wireless communication system to which positioning of a terminal is applied according to an embodiment of the present invention.
- FIG. 14 is a diagram illustrating various procedures for location service according to an embodiment of the present invention.
- 15 is a flowchart illustrating a reporting method according to an embodiment of the present invention.
- 16 is a flowchart illustrating an example of a reporting method according to an embodiment of the present invention.
- 17 is a flowchart illustrating another example of a reporting method according to an embodiment of the present invention.
- FIG. 18 is a block diagram illustrating a wireless device in which an embodiment of the present invention is implemented.
- E-UTRAN Evolved-UMTS Terrestrial Radio Access Network
- LTE Long Term Evolution
- the E-UTRAN includes a base station (BS) 20 that provides a control plane and a user plane to a user equipment (UE).
- the terminal 10 may be fixed or mobile and may be called by other terms such as a mobile station (MS), a user terminal (UT), a subscriber station (SS), a mobile terminal (MT), a wireless device (Wireless Device), and the like.
- the base station 20 refers to a fixed station communicating with the terminal 10, and may be referred to by other terms such as an evolved-NodeB (eNB), a base transceiver system (BTS), an access point, and the like.
- eNB evolved-NodeB
- BTS base transceiver system
- access point and the like.
- the base stations 20 may be connected to each other through an X2 interface.
- the base station 20 is connected to a Serving Gateway (S-GW) through an MME (Mobility Management Entity) and an S1-U through an Evolved Packet Core (EPC) 30, more specifically, an S1-MME through an S1 interface.
- S-GW Serving Gateway
- MME Mobility Management Entity
- EPC Evolved Packet Core
- EPC 30 is composed of MME, S-GW and P-GW (Packet Data Network-Gateway).
- the MME has information about the access information of the terminal or the capability of the terminal, and this information is mainly used for mobility management of the terminal.
- S-GW is a gateway having an E-UTRAN as an endpoint
- P-GW is a gateway having a PDN as an endpoint.
- Layers of the Radio Interface Protocol between the terminal and the network are based on the lower three layers of the Open System Interconnection (OSI) reference model, which is widely known in communication systems.
- L2 second layer
- L3 third layer
- the RRC Radio Resource Control
- the RRC layer located in the third layer plays a role of controlling radio resources between the terminal and the network. To this end, the RRC layer exchanges an RRC message between the terminal and the base station.
- FIG. 2 is a block diagram illustrating a radio protocol architecture for a user plane.
- 3 is a block diagram illustrating a radio protocol structure for a control plane.
- the data plane is a protocol stack for user data transmission
- the control plane is a protocol stack for control signal transmission.
- a physical layer (PHY) layer provides an information transfer service to a higher layer using a physical channel.
- the physical layer is connected to a medium access control (MAC) layer, which is an upper layer, through a transport channel. Data is moved between the MAC layer and the physical layer through the transport channel. Transport channels are classified according to how and with what characteristics data is transmitted over the air interface.
- MAC medium access control
- the physical channel may be modulated by an orthogonal frequency division multiplexing (OFDM) scheme and utilizes time and frequency as radio resources.
- OFDM orthogonal frequency division multiplexing
- the functions of the MAC layer include mapping between logical channels and transport channels and multiplexing / demultiplexing into transport blocks provided as physical channels on transport channels of MAC service data units (SDUs) belonging to the logical channels.
- the MAC layer provides a service to a Radio Link Control (RLC) layer through a logical channel.
- RLC Radio Link Control
- RLC layer Functions of the RLC layer include concatenation, segmentation, and reassembly of RLC SDUs.
- QoS Quality of Service
- the RLC layer has a transparent mode (TM), an unacknowledged mode (UM), and an acknowledged mode (Acknowledged Mode).
- TM transparent mode
- UM unacknowledged mode
- Acknowledged Mode acknowledged mode
- AM Three modes of operation (AM).
- AM RLC provides error correction through an automatic repeat request (ARQ).
- the RRC (Radio Resource Control) layer is defined only in the control plane.
- the RRC layer is responsible for the control of logical channels, transport channels, and physical channels in connection with configuration, re-configuration, and release of radio bearers.
- RB means a logical path provided by the first layer (PHY layer) and the second layer (MAC layer, RLC layer, PDCP layer) for data transmission between the terminal and the network.
- PDCP Packet Data Convergence Protocol
- Functions of the Packet Data Convergence Protocol (PDCP) layer in the user plane include delivery of user data, header compression, and ciphering.
- the functionality of the Packet Data Convergence Protocol (PDCP) layer in the user plane includes the transfer of control plane data and encryption / integrity protection.
- the establishment of the RB means a process of defining characteristics of a radio protocol layer and a channel to provide a specific service, and setting each specific parameter and operation method.
- RB can be further divided into SRB (Signaling RB) and DRB (Data RB).
- SRB is used as a path for transmitting RRC messages in the control plane
- DRB is used as a path for transmitting user data in the user plane.
- the UE If an RRC connection is established between the RRC layer of the UE and the RRC layer of the E-UTRAN, the UE is in an RRC connected state, otherwise it is in an RRC idle state.
- the downlink transmission channel for transmitting data from the network to the UE includes a BCH (Broadcast Channel) for transmitting system information and a downlink shared channel (SCH) for transmitting user traffic or control messages.
- Traffic or control messages of a downlink multicast or broadcast service may be transmitted through a downlink SCH or may be transmitted through a separate downlink multicast channel (MCH).
- the uplink transport channel for transmitting data from the terminal to the network includes a random access channel (RACH) for transmitting an initial control message and an uplink shared channel (SCH) for transmitting user traffic or control messages.
- RACH random access channel
- SCH uplink shared channel
- BCCH broadcast control channel
- PCCH paging control channel
- CCCH common control channel
- MCCH multicast control channel
- MTCH multicast traffic
- the physical channel is composed of several OFDM symbols in the time domain and several sub-carriers in the frequency domain.
- One sub-frame consists of a plurality of OFDM symbols in the time domain.
- the RB is a resource allocation unit and includes a plurality of OFDM symbols and a plurality of subcarriers.
- each subframe may use specific subcarriers of specific OFDM symbols (eg, the first OFDM symbol) of the corresponding subframe for the physical downlink control channel (PDCCH), that is, the L1 / L2 control channel.
- Transmission Time Interval is a unit time of subframe transmission.
- the RRC state refers to whether or not the RRC layer of the UE is in a logical connection with the RRC layer of the E-UTRAN. If connected, the RRC connection state is called. Since the UE in the RRC connected state has an RRC connection, the E-UTRAN can grasp the existence of the corresponding UE in a cell unit, and thus can effectively control the UE. On the other hand, the UE of the RRC idle state cannot be recognized by the E-UTRAN, and is managed by the CN (core network) in units of a tracking area, which is a larger area unit than a cell. That is, the UE in the RRC idle state is identified only in a large area unit, and must move to the RRC connected state to receive a normal mobile communication service such as voice or data.
- CN core network
- the terminal When the user first powers on the terminal, the terminal first searches for an appropriate cell and then stays in an RRC idle state in the cell.
- the UE in the RRC idle state needs to establish an RRC connection, it establishes an RRC connection with the E-UTRAN through an RRC connection procedure and transitions to the RRC connected state.
- RRC connection procedure There are several cases in which the UE in RRC idle state needs to establish an RRC connection. For example, an uplink data transmission is necessary due to a user's call attempt, or a paging message is sent from E-UTRAN. If received, a response message may be sent.
- the non-access stratum (NAS) layer located above the RRC layer performs functions such as session management and mobility management.
- EMM-REGISTERED EPS Mobility Management-REGISTERED
- EMM-DEREGISTERED EMM-DEREGISTERED
- the initial terminal is in the EMM-DEREGISTERED state, and the terminal performs a process of registering with the corresponding network through an initial attach procedure to access the network. If the attach procedure is successfully performed, the UE and the MME are in the EMM-REGISTERED state.
- an EPS Connection Management (ECM) -IDLE state In order to manage a signaling connection between the UE and the EPC, two states are defined, an EPS Connection Management (ECM) -IDLE state and an ECM-CONNECTED state, and these two states are applied to the UE and the MME.
- ECM EPS Connection Management
- ECM-IDLE state When the UE in the ECM-IDLE state establishes an RRC connection with the E-UTRAN, the UE is in the ECM-CONNECTED state.
- the MME in the ECM-IDLE state becomes the ECM-CONNECTED state when it establishes an S1 connection with the E-UTRAN.
- the E-UTRAN does not have context information of the terminal.
- the UE in the ECM-IDLE state performs a terminal-based mobility related procedure such as cell selection or cell reselection without receiving a command from the network.
- a terminal-based mobility related procedure such as cell selection or cell reselection without receiving a command from the network.
- the terminal when the terminal is in the ECM-CONNECTED state, the mobility of the terminal is managed by the command of the network.
- the terminal In the ECM-IDLE state, if the position of the terminal is different from the position known by the network, the terminal informs the network of the corresponding position of the terminal through a tracking area update procedure.
- the system information includes essential information that the terminal needs to know in order to access the base station. Therefore, the terminal must receive all system information before accessing the base station, and must always have the latest system information. In addition, since the system information is information that all terminals in a cell should know, the base station periodically transmits the system information.
- the system information includes a master information block (MIB) and a scheduling block (SB). , SIB System Information Block).
- MIB master information block
- SB scheduling block
- the MIB enables the UE to know the physical configuration of the cell, for example, bandwidth.
- SB informs transmission information of SIBs, for example, a transmission period.
- SIB is a collection of related system information. For example, some SIBs contain only information of neighboring cells, and some SIBs contain only information of an uplink radio channel used by the terminal.
- services provided by a network to a terminal can be classified into three types as follows.
- the terminal also recognizes the cell type differently according to which service can be provided. The following describes the service type first, followed by the cell type.
- Limited service This service provides Emergency Call and Tsunami Warning System (ETWS) and can be provided in an acceptable cell.
- ETWS Emergency Call and Tsunami Warning System
- Normal service This service means a public use for general use, and can be provided in a suitable or normal cell.
- This service means service for network operator. This cell can be used only by network operator and not by general users.
- the cell types may be classified as follows.
- Acceptable cell A cell in which the terminal can receive limited service. This cell is a cell that is not barred from the viewpoint of the terminal and satisfies the cell selection criteria of the terminal.
- Suitable cell The cell that the terminal can receive a regular service. This cell satisfies the conditions of an acceptable cell and at the same time satisfies additional conditions. As an additional condition, this cell must belong to a Public Land Mobile Network (PLMN) to which the terminal can access, and must be a cell which is not prohibited from performing a tracking area update procedure of the terminal. If the cell is a CSG cell, the terminal should be a cell that can be connected to the cell as a CSG member.
- PLMN Public Land Mobile Network
- Barred cell A cell that broadcasts information that a cell is a prohibited cell through system information.
- Reserved cell A cell that broadcasts information that a cell is a reserved cell through system information.
- 4 is a flowchart illustrating an operation of a terminal in an RRC idle state. 4 illustrates a procedure in which a UE, which is initially powered on, registers with a network through a cell selection process and then reselects a cell if necessary.
- the terminal selects a radio access technology (RAT) for communicating with a public land mobile network (PLMN), which is a network to be serviced (S410).
- RAT radio access technology
- PLMN public land mobile network
- S410 a network to be serviced
- Information about the PLMN and the RAT may be selected by a user of the terminal or may be stored in a universal subscriber identity module (USIM).
- USIM universal subscriber identity module
- the terminal selects a cell having the largest value among the measured base station and a cell whose signal strength or quality is greater than a specific value (Cell Selection) (S420). This is referred to as initial cell selection by the UE that is powered on to perform cell selection. The cell selection procedure will be described later.
- the terminal receives system information periodically transmitted by the base station.
- the above specific value refers to a value defined in the system in order to ensure the quality of the physical signal in data transmission / reception. Therefore, the value may vary depending on the RAT applied.
- the terminal performs a network registration procedure (S430).
- the terminal registers its information (eg IMSI) in order to receive a service (eg paging) from the network.
- IMSI information
- a service eg paging
- the terminal selects a cell, the terminal does not register to the access network, and if the network information received from the system information (e.g., tracking area identity; TAI) is different from the network information known to the network, the terminal registers to the network. do.
- the system information e.g., tracking area identity; TAI
- the terminal performs cell reselection based on the service environment provided by the cell or the environment of the terminal (S440).
- the terminal selects one of the other cells that provides better signal characteristics than the cell of the base station to which the terminal is connected if the strength or quality of the signal measured from the base station being service is lower than the value measured from the base station of the adjacent cell. do.
- This process is called Cell Re-Selection, which is distinguished from Initial Cell Selection of Step 2.
- a time constraint is placed. The cell reselection procedure will be described later.
- FIG. 5 is a flowchart illustrating a process of establishing an RRC connection.
- the terminal sends an RRC connection request message to the network requesting an RRC connection (S510).
- the network sends an RRC connection setup message in response to the RRC connection request (S520). After receiving the RRC connection configuration message, the terminal enters the RRC connection mode.
- the terminal sends an RRC Connection Setup Complete message used to confirm successful completion of RRC connection establishment to the network (S530).
- RRC connection reconfiguration is used to modify an RRC connection. It is used to establish / modify / release RBs, perform handovers, and set up / modify / release measurements.
- the network sends an RRC connection reconfiguration message for modifying the RRC connection to the terminal (S610).
- the UE sends an RRC connection reconfiguration complete message used to confirm successful completion of the RRC connection reconfiguration to the network (S620).
- the terminal selects / reselects a cell of appropriate quality and performs procedures for receiving service.
- the UE in the RRC idle state should always select a cell of appropriate quality and prepare to receive service through this cell. For example, a terminal that has just been powered on must select a cell of appropriate quality to register with the network. When the terminal in the RRC connected state enters the RRC idle state, the terminal should select a cell to stay in the RRC idle state. As such, the process of selecting a cell satisfying a certain condition in order for the terminal to stay in a service standby state such as an RRC idle state is called cell selection.
- the cell selection is performed in a state in which the UE does not currently determine a cell to stay in the RRC idle state, it is most important to select the cell as soon as possible. Therefore, if the cell provides a radio signal quality of a predetermined criterion or more, even if this cell is not the cell providing the best radio signal quality to the terminal, it may be selected during the cell selection process of the terminal.
- PLMN public land mobile network
- PLMN is a network deployed or operated by a mobile network operator. Each mobile network operator operates one or more PLMNs. Each PLMN may be identified by a mobile country code (MCC) and a mobile network code (MCN). The PLMN information of the cell is included in the system information and broadcasted.
- MCC mobile country code
- MN mobile network code
- the terminal attempts to register the selected PLMN. If the registration is successful, the selected PLMN becomes a registered PLMN (RPLMN).
- the network may signal the PLMN list to the UE, which may consider PLMNs included in the PLMN list as PLMNs such as RPLMNs.
- the terminal registered in the network should be reachable by the network at all times. If the terminal is in the ECM-CONNECTED state (same as RRC connected state), the network recognizes that the terminal is receiving the service. However, when the terminal is in the ECM-IDLE state (same as the RRC idle state), the situation of the terminal is not valid in the eNB but is stored in the MME. In this case, the location of the UE in the ECM-IDLE state is known only to the MME as granularity of the list of tracking areas (TAs). A single TA is identified by a tracking area identity (TAI) consisting of the PLMN identifier to which the TA belongs and a tracking area code (TAC) that uniquely represents the TA within the PLMN.
- TAI tracking area identity
- TAC tracking area code
- the UE selects a cell having a signal quality and characteristics capable of receiving an appropriate service from among cells provided by the selected PLMN.
- an initial cell selection process in which the terminal does not have prior information on the radio channel. Accordingly, the terminal searches all radio channels to find an appropriate cell. In each channel, the terminal finds the strongest cell. Thereafter, the terminal selects a corresponding cell if it finds a suitable cell that satisfies a cell selection criterion.
- the terminal may select the cell by using the stored information or by using the information broadcast in the cell.
- cell selection can be faster than the initial cell selection process.
- the UE selects a corresponding cell if it finds a cell that satisfies the cell selection criteria. If a suitable cell that satisfies the cell selection criteria is not found through this process, the UE performs an initial cell selection process.
- the terminal After the terminal selects a cell through a cell selection process, the strength or quality of a signal between the terminal and the base station may change due to a change in mobility or a wireless environment of the terminal. Therefore, if the quality of the selected cell is degraded, the terminal may select another cell that provides better quality. When reselecting a cell in this way, a cell that generally provides better signal quality than the currently selected cell is selected. This process is called cell reselection.
- the cell reselection process has a basic purpose in selecting a cell that generally provides the best quality to a terminal in view of the quality of a radio signal.
- the network may determine the priority for each frequency and notify the terminal. Upon receiving this priority, the UE considers this priority prior to the radio signal quality criteria in the cell reselection process.
- a method of selecting or reselecting a cell according to a signal characteristic of a wireless environment In selecting a cell for reselection when reselecting a cell, the following cell reselection is performed according to a cell's RAT and frequency characteristics. There may be a method of selection.
- Intra-frequency cell reselection Reselection of a cell having a center-frequency equal to the RAT, such as a cell where the UE is camping
- Inter-frequency cell reselection Reselects a cell having a center frequency different from that of the same RAT as the cell camping
- Inter-RAT cell reselection UE reselects a cell using a RAT different from the camping RAT
- the UE measures the quality of a serving cell and a neighboring cell for cell reselection.
- cell reselection is performed based on cell reselection criteria.
- the cell reselection criteria have the following characteristics with respect to serving cell and neighbor cell measurements.
- Intra-frequency cell reselection is basically based on ranking.
- Ranking is an operation of defining index values for cell reselection evaluation and using the index values to order the cells in the order of the index values.
- the cell with the best indicator is often called the best ranked cell.
- the cell index value is a value obtained by applying a frequency offset or a cell offset as necessary based on the value measured by the terminal for the corresponding cell.
- Inter-frequency cell reselection is based on the frequency priority provided by the network.
- the terminal attempts to camp on the frequency with the highest frequency priority.
- the network may provide the priorities to be commonly applied to the terminals in the cell or provide the frequency priority through broadcast signaling, or may provide the priority for each frequency for each terminal through dedicated signaling.
- the network may provide the UE with parameters (for example, frequency-specific offset) used for cell reselection for each frequency.
- the network may provide the UE with a neighboring cell list (NCL) used for cell reselection to the UE.
- NCL neighboring cell list
- This NCL contains cell-specific parameters (eg cell-specific offsets) used for cell reselection.
- the network may provide the UE with a cell reselection prohibition list (black list) used for cell reselection to the UE.
- the UE does not perform cell reselection for a cell included in the prohibition list.
- the ranking criterion used to prioritize the cells is defined as in Equation 1.
- Rs is a ranking indicator of the serving cell
- Rn is a ranking indicator of the neighbor cell
- Qmeas s is a quality value measured by the UE for the serving cell
- Qmeas n is a quality value measured by the UE for the neighbor cell
- Qhyst is The hysteresis value, Qoffset, for the ranking is the offset between two cells.
- the ranking index Rs of the serving cell and the ranking index Rn of the neighboring cell change in a similar state, the ranking ranking is constantly changed as a result of the change, such that the terminal may alternately select two cells.
- Qhyst is a parameter for giving hysteresis in cell reselection to prevent the UE from reselecting two cells alternately.
- the UE measures the Rs of the serving cell and the Rn of the neighboring cell according to the above equation, considers the cell having the highest ranking indicator value as the best ranked cell, and reselects the cell.
- the quality of the cell serves as the most important criterion in cell reselection. If the reselected cell is not a normal cell, the terminal excludes the frequency or the corresponding cell from the cell reselection target.
- RRM radio resource management
- the terminal may perform measurement for a specific purpose set by the network and report the measurement result to the network in order to provide information that may help the operator operate the network in addition to the purpose of mobility support. For example, the terminal receives broadcast information of a specific cell determined by the network.
- the terminal may include a cell identity (also referred to as a global cell identifier) of the specific cell, location identification information (eg, tracking area code) to which the specific cell belongs, and / or other cell information (eg, For example, whether a member of a closed subscriber group (CSG) cell) may be reported to the serving cell.
- a cell identity also referred to as a global cell identifier
- location identification information eg, tracking area code
- CSG closed subscriber group
- the mobile station may report location information and measurement results of poor quality cells to the network.
- the network can optimize the network based on the report of the measurement results of the terminals helping the network operation.
- the terminal In a mobile communication system with a frequency reuse factor of 1, mobility is mostly between different cells in the same frequency band. Therefore, in order to ensure the mobility of the terminal well, the terminal should be able to measure the quality and cell information of neighboring cells having the same center frequency as the center frequency of the serving cell. As such, the measurement of the cell having the same center frequency as that of the serving cell is called an intra-frequency measurement. The terminal performs the same frequency measurement and reports the measurement result to the network at an appropriate time, so that the purpose of the corresponding measurement result is achieved.
- the mobile operator may operate the network using a plurality of frequency bands.
- the terminal may measure quality and cell information of neighboring cells having a center frequency different from that of the serving cell. Should be As such, a measurement for a cell having a center frequency different from that of the serving cell is referred to as another inter-frequency measurement.
- the terminal should be able to report the measurement results to the network at an appropriate time by performing another frequency measurement.
- the measurement of the cell of the heterogeneous network may be performed by the base station configuration.
- This measurement for heterogeneous networks is referred to as inter-RAT (Radio Access Technology) measurement.
- the RAT may include a UMTS Terrestrial Radio Access Network (UTRAN) and a GSM EDGE Radio Access Network (GERAN) conforming to the 3GPP standard, and may also include a CDMA 2000 system conforming to the 3GPP2 standard.
- UTRAN UMTS Terrestrial Radio Access Network
- GERAN GSM EDGE Radio Access Network
- the terminal receives measurement configuration information from the base station.
- a message including measurement setting information is called a measurement setting message.
- the terminal performs the measurement based on the measurement setting information. If the measurement result satisfies the reporting conditions in the measurement configuration information, the terminal reports the measurement result to the base station.
- a message containing a measurement result is called a measurement report message.
- the measurement setting information may include the following information.
- the measurement target includes at least one of an intra-frequency measurement target for intra-cell measurement, an inter-frequency measurement target for inter-cell measurement, and an inter-RAT measurement target for inter-RAT measurement.
- the intra-frequency measurement object indicates a neighboring cell having the same frequency band as the serving cell
- the inter-frequency measurement object indicates a neighboring cell having a different frequency band from the serving cell
- the inter-RAT measurement object is
- the RAT of the serving cell may indicate a neighboring cell of another RAT.
- Reporting configuration information Information on a reporting condition and a report type relating to when a terminal reports a measurement result.
- the reporting condition may include information about an event or a period at which the reporting of the measurement result is triggered.
- the report type is information about what type of measurement result to configure.
- Measurement identity information This is information about a measurement identifier that associates a measurement object with a report configuration, and allows the terminal to determine what type and when to report to which measurement object.
- the measurement identifier information may be included in the measurement report message to indicate which measurement object the measurement result is and in which reporting condition the measurement report occurs.
- Quantitative configuration information information on a parameter for setting filtering of a measurement unit, a reporting unit, and / or a measurement result value.
- Measurement gap information Information about a measurement gap, which is a section in which a UE can only use measurement without considering data transmission with a serving cell because downlink transmission or uplink transmission is not scheduled. .
- the terminal has a measurement target list, a measurement report configuration list, and a measurement identifier list to perform a measurement procedure.
- the base station may set only one measurement target for one frequency band to the terminal.
- E-UTRA Evolved Universal Terrestrial Radio Access
- RRC Radio Resource Control
- Protocol specification Release 8
- the terminal If the measurement result of the terminal satisfies the set event, the terminal transmits a measurement report message to the base station.
- the measurement report may include a measurement identifier, a measured quality of the serving cell, and a measurement result of a neighboring cell.
- the measurement identifier identifies the measurement object for which the measurement report is triggered.
- the measurement result of the neighbor cell may include the cell identifier of the neighbor cell and the measured quality.
- the measured quality may include at least one of Reference Signal Received Power (RSRP) and Reference Signal Received Quality (RSRQ).
- the UE continuously measures to maintain the quality of the radio link with the serving cell receiving the service.
- the terminal determines whether communication is impossible in the current situation due to deterioration of the quality of the radio link with the serving cell. If the quality of the serving cell is so low that communication is almost impossible, the terminal determines the current situation as a radio connection failure.
- the UE abandons communication with the current serving cell, selects a new cell through a cell selection (or cell reselection) procedure, and reestablishes an RRC connection to the new cell (RRC connection re). -establishment).
- the UE determines that there is a serious problem in the downlink communication quality based on the radio quality measurement result of the physical layer of the UE (when it is determined that the PCell quality is low during the RLM)
- FIG. 7 is a diagram illustrating a RRC connection reestablishment procedure.
- the terminal stops use of all radio bearers which have been set except for Signaling Radio Bearer # 0 (SRB 0) and initializes various sublayers of an access stratum (AS) (S710).
- SRB 0 Signaling Radio Bearer # 0
- AS access stratum
- each sublayer and physical layer are set to a default configuration.
- the UE maintains an RRC connection state.
- the UE performs a cell selection procedure for performing an RRC connection reconfiguration procedure (S720).
- the cell selection procedure of the RRC connection reestablishment procedure may be performed in the same manner as the cell selection procedure performed by the UE in the RRC idle state, although the UE maintains the RRC connection state.
- the terminal After performing the cell selection procedure, the terminal checks the system information of the corresponding cell to determine whether the corresponding cell is a suitable cell (S730). If it is determined that the selected cell is an appropriate E-UTRAN cell, the terminal transmits an RRC connection reestablishment request message to the cell (S740).
- the RRC connection re-establishment procedure is stopped, the terminal is in the RRC idle state Enter (S750).
- the terminal may be implemented to complete the confirmation of the appropriateness of the cell within a limited time through the cell selection procedure and the reception of system information of the selected cell.
- the UE may drive a timer as the RRC connection reestablishment procedure is initiated.
- the timer may be stopped when it is determined that the terminal has selected a suitable cell. If the timer expires, the UE may consider that the RRC connection reestablishment procedure has failed and may enter the RRC idle state.
- This timer is referred to hereinafter as a radio link failure timer.
- a timer named T311 may be used as a radio link failure timer.
- the terminal may obtain the setting value of this timer from the system information of the serving cell.
- the cell When the RRC connection reestablishment request message is received from the terminal and the request is accepted, the cell transmits an RRC connection reestablishment message to the terminal.
- the UE Upon receiving the RRC connection reestablishment message from the cell, the UE reconfigures the PDCP sublayer and the RLC sublayer for SRB1. In addition, it recalculates various key values related to security setting and reconfigures the PDCP sublayer responsible for security with newly calculated security key values. Through this, SRB 1 between the UE and the cell is opened and an RRC control message can be exchanged. The terminal completes the resumption of SRB1 and transmits an RRC connection reestablishment complete message indicating that the RRC connection reestablishment procedure is completed to the cell (S760).
- the cell transmits an RRC connection reestablishment reject message to the terminal.
- the cell and the terminal performs the RRC connection reestablishment procedure.
- the UE recovers the state before performing the RRC connection reestablishment procedure and guarantees the continuity of the service to the maximum.
- Subscriber and equipment traces provide very detailed information at the call level for one or more specific mobiles. This data can be an additional source of information for performance measurement and also allow for more advanced monitoring and optimization operations. Unlike performance measurements, which are always sources of information, traces can be activated at the request / needs of the user for a limited time period for specific analysis purposes. Tracking includes determining root cause of malfunctioning mobile, improved troubleshooting, optimizing resource usage and quality, controlling radio frequency (RF) coverage, improving capacity, analyzing dropouts, core network Network) and UTRAN play a very important role in operations such as UMTS procedure checks.
- RF radio frequency
- Log data on the interface at the call level for a service initiated by a particular user eg International Mobile Subscriber Identity
- mobile type eg International Mobile Equipment Identity (IMEI) or IMEIS and Software Version (IMEISV)
- performance measures such as recognition of end-user QoS during a call (eg requested QoS vs. provided QoS), correlation between protocol messages and RF measurements, or interoperability with specific mobile vendors.
- Information that cannot be obtained can be obtained. Tracking data is collected at the TCE.
- MDT Minimization of Driving Tests
- MDT allows conventional operators to perform measurements and report the results to the terminal instead of using a drive test to measure the quality of the cell using a car. . Coverage depends on the location of the base station, the layout of the surrounding buildings, and the environment of use of the user. Therefore, the operator needs to periodically drive test, which is expensive and resource-intensive. In order to overcome this disadvantage, the MDT is proposed that the operator measures the coverage using the terminal.
- the operator synthesizes the MDT measurement values received from the various terminals to create a coverage map that shows the distribution of service availability and quality of service over the entire area in which the operator provides the service. It can be utilized. For example, if a coverage problem of a specific area is reported from the terminal, the operator may expand the coverage of the corresponding area cell by increasing the transmission power of the base station providing the service of the corresponding area. In this way, the time and cost of network optimization can be minimized.
- MDT is built on a framework of tracing, one of the operator's tools for operation, administration, and maintenance (OAM).
- OAM operator's tools for operation, administration, and maintenance
- the tracking function provides the operator with the ability to track and log the behavior of the terminal, thus making it possible to determine the main cause of terminal-side malfunction.
- Traced data is collected on the network, which is called a trace collection entity (TCE).
- TCE trace collection entity
- Tracking functionality used for MDT includes tracking based signaling and management based tracking functions. Tracking function based signaling is used for activating an MDT task for a specific terminal, whereas tracking function based management is used for activating an MDT task without being limited to a specific terminal.
- MDT can be divided into two types, the logged MDT (immediate MDT) and the immediate MDT (immediate MDT) according to whether the terminal reports the measured and stored log data in real time or in real time.
- the logged MDT is a method in which the terminal logs the data after the MDT measurement and then transmits the data to the network.
- MDT is a method of measuring MDT and sending the data directly to the network. According to the logged MDT, the UE performs the MDT measurement in the RRC idle state, but immediately according to MDT, the UE performs the MDT measurement in the RRC connected state.
- FIG. 8 is a flowchart illustrating a method of performing a logged MDT.
- the terminal receives a logged measurement configuration (S810).
- the logged measurement configuration may be included in the RRC message and transmitted as a downlink control channel.
- the logged measurement setting may include at least one of a TCE ID, reference time information for logging, logging duration, logging interval, and area configuration. It may include.
- the logging interval indicates an interval for storing the measurement result.
- the logging duration indicates the duration for which the terminal performs the logged MDT.
- the reference time indicates a time that is a reference for the duration of performing the logged MDT.
- the area setting indicates the area where the terminal is requested to perform logging.
- the validity timer refers to the lifetime of the logged measurement setup, which can be specified by information about the logging duration.
- the duration of the validity timer may indicate not only the valid lifetime of the logged measurement configuration but also the validity of the measurement results possessed by the terminal.
- the procedure in which the UE sets the measured measurement and the related procedures are performed is called a configuration phase.
- the terminal When the terminal enters the RRC idle state (S821), the terminal logs the measurement result while the validity timer is driven (S822).
- the measurement result value may include RSRP, RSRQ, received signal code power (RSCP), Ec / No, and the like.
- RSRP received signal code power
- Ec / No information logging the measurement result
- a temporal interval during which the UE logs at least one measurement result is called a logging phase.
- the terminal performing the logged MDT based on the logged measurement configuration may vary depending on the location of the terminal.
- FIG. 9 is a diagram illustrating an example of a logged MDT according to a logging region.
- the network may set a logging area which is an area where the terminal should log.
- the logging area may be represented by a cell list or a tracking area / location area list.
- the terminal stops logging when it leaves the logging area.
- the first area 910 and the third area 930 are areas set as logging areas, and the second area 920 is areas where logging is not allowed.
- the terminal logs in the first area 910 but does not log in the second area 920.
- the terminal moves from the second area 920 to the third area 930, the terminal performs logging again.
- FIG. 10 is a diagram illustrating an example of a logged MDT according to a RAT change.
- the UE performs logging only when it is camped on the RAT receiving the logged measurement configuration, and stops logging at another RAT. However, the UE may log cell information of another RAT in addition to the staying RAT.
- the first region 1010 and the third region 1030 are E-UTRAN regions, and the second region 1020 is a UTRAN region.
- the logged measurement settings are received from the E-UTRAN.
- the terminal enters the second region 1020, the terminal does not perform the MDT measurement.
- the terminal when the terminal enters the RRC connection state (831) and there is a logged measurement to report, the terminal informs the base station that there is a logged measurement to report (S832).
- the terminal may inform the base station that there is a logged measurement when the RRC connection is established, the RRC connection is re-established, or the RRC connection is reconfigured.
- the terminal performs the handover it may be notified that there is a logged measurement in the handover target cell.
- Informing the base station that there is a logged measurement may include transmitting a logged measurements available indicator, which is indication information indicating that there is a logged measurement, in an RRC message transmitted by the terminal to the base station.
- the RRC message may be an RRC connection setup complete message, an RRC connection reestablishment complete message, an RRC reset complete message, or a handover complete message.
- the base station When the base station receives a signal indicating that there is a logged measurement from the terminal, it requests the terminal to report the logged measurement (S833). Requesting to report the logged measurement may include transmitting a logged measurement report request parameter related to the information indicating this in an RRC message.
- the RRC message may be a UE information request message.
- reporting the logged measurements to the base station may include sending a logged measurements report including the logged measurements to the base station in an RRC message.
- the RRC message may be a UE information report message.
- the terminal may report the entire logged measurement that the terminal has to the base station or report a part thereof to the base station. If some are reported, some reported may be discarded.
- the terminal informs the base station that there is a logged measurement, is requested to report from the base station, and accordingly, a process in which the process of reporting the logged measurement is performed is called a reporting phase.
- the measurement by the terminal while the logged MDT is performed is mainly related to the wireless environment.
- MDT measurements may include the cell identifier, the signal quality and / or signal strength of the cell.
- MDT measurements can include measurement time and measurement location.
- the following table exemplifies contents logged by the terminal.
- Information logged at different logging points may be stored to be divided into different log entries as shown below.
- 11 is a diagram illustrating an example of logged measurements.
- the logged measurement includes one or more log entries.
- the log entry includes a logging location, a logging time, a serving cell identifier, a serving cell measurement result, and a neighbor cell measurement result.
- the logging position indicates the position measured by the terminal.
- the logging time represents the time measured by the terminal.
- Information logged at different logging times is stored in different log entries.
- the serving cell identifier may include a cell identifier in layer 3, which is called a global cell identity (GCI).
- GCI is a set of physical cell identity (PCI) and PLMN identifiers.
- the terminal may analyze and log performance related indicators of the terminal in addition to the wireless environment. For example, throughput, erroneous transmission / reception rate, and the like may be included.
- the aforementioned logging phase and reporting phase may exist multiple times within the logging duration (S841, S842).
- the base station When the base station receives the reported measurement, it can record / store it in the TCE.
- the terminal After the validity timer expires, that is, after the logging duration has elapsed, if the terminal has a logged measurement that has not yet been reported, the terminal performs a procedure for reporting it to the base station.
- the phase in which all the procedures are carried out is called the post-reporting phase.
- the terminal discards the measured measurement configuration after the end of the logging duration and starts a conservation timer. After the logging duration ends, the UE stops measuring the MDT. However, the measurements already logged are not discarded. The retention timer indicates the lifetime of the remaining logged measurements.
- the UE If the UE enters the RRC connection state before the retention timer expires (S851), it is possible to report a logged measurement not yet reported to the base station. In this case, the above-described procedure for the logged measurement report may be performed (S852, S853, S854). When the retention timer expires, the remaining logged measurements can be discarded. When the base station receives the reported measurement, it can record / store it in the TCE.
- the preservation timer may be set to the terminal in advance by being fixed to a predetermined value in the terminal.
- the value of the retention timer may be 48 hours.
- the value of the retention timer may be included in the logged measurement setting and transmitted to the terminal, or may be included in another RRC message and transmitted to the terminal.
- the terminal may update the existing logged measurement settings with the newly acquired logged measurement settings.
- the validity timer may be restarted from the time when the logged measurement setting is newly received.
- logged measurements based on previously logged measurement settings may be discarded.
- MDT is a diagram illustrating an example of an immediate MDT.
- MDT is based on RRM (radio resource management) measurement and reporting mechanism, and additionally reports the information to the base station by adding information related to the location when reporting.
- RRM radio resource management
- the terminal receives an RRC connection reset message (S1210) and transmits an RRC connection reset complete message (S1220). Through this, the terminal enters the RRC connection state.
- the terminal may receive the measurement setting through receiving the RRC connection reset message.
- the measurement setting is received through an RRC connection reestablishment message. However, this may be included in another RRC message and transmitted.
- the terminal performs measurement and evaluation in the RRC connection state (S1231) and reports the measurement result to the base station (S1232).
- the measurement results may provide accurate location information, if possible, such as an example of global navigation satellite system (GNSS) location information.
- GNSS global navigation satellite system
- location measurement such as an RF fingerprint, it may provide neighbor cell measurement information that may be used to determine the location of the terminal.
- the UE reports this failure event to the network when an RLF occurs or a handover failure occurs in order to support Mobility Robustness Optimization (MRO) of the network.
- MRO Mobility Robustness Optimization
- the UE may provide an RLF report to the eNB.
- Radio measurements included in the RLF report can be used as potential reasons for failure to identify coverage problems. This information can be used to exclude such events from the MRO evaluation of intra-LTE mobility connection failures and to write those events as input to other algorithms.
- the UE may generate a valid RLF report for the eNB after reconnecting in the idle mode. For this purpose, the UE stores the latest RLF or handover failure related information, and for 48 hours after the RLF report is retrieved by the network or after the RLF or handover failure is detected, the RRC connection ( Re-establishment and handover may indicate to the LTE cell that the RLF report is valid.
- the UE maintains the information during state transition and RAT change, and indicates that the RLF report is valid again after returning to the LTE RAT.
- the validity of the RLF report in the RRC connection establishment procedure indicates that the UE has been interrupted such as a connection failure and that the RLF report due to this failure has not yet been delivered to the network.
- the RLF report from the terminal includes the following information.
- E-CGI of the target cell of the last cell in case of RRL or handover that provided a service to the terminal. If the E-CGI is unknown, PCI and frequency information is used instead.
- E-CGI of the cell that serviced the terminal when the last handover initialization for example when message 7 (RRC connection reset) was received by the terminal.
- the eNB receiving the RLF failure from the terminal may forward the report to the eNB that provided the service to the terminal before the reported connection failure.
- Radio measurements included in the RLF report can be used to identify coverage issues as a potential cause of radio link failure. This information can be used to exclude these events from the MRO assessment of intra-LTE mobility connection failures and send them back as input to other algorithms.
- RLF reporting can be considered as part of the MDT.
- Dealing with the non-availability measurement of a connection for a terminal has many aspects, which deal with both common channels and connection procedures.
- the terminal In order to inform the invalidity of the connection to the network, and thus to help optimize parameters for increasing the validity of the connection, the terminal performs accessibility measurement in case of connection establishment failure. In order to measure accessibility, the terminal performs the following logging.
- a time stamp derived by using a relative timer that counts the time between failure and reporting is included.
- the storage time for accessibility measurement is 48 hours.
- Accessibility measures can be considered as part of the MDT.
- the positioning function provides a means for determining the geographical location and / or speed of the terminal based on the measurement of the radio signal.
- the location information may be requested and reported to the client by the client to which the terminal is coupled (e.g. application) or the client in or attached to the core network.
- the location information is reported in a standard format, which is cell based or geographic coordinates with an estimated error (uncertainty) of the location and speed of the terminal and, if possible, the location method (or list of methods) used to obtain the location estimate. It can be implemented as.
- the majority of activating or deactivating terminals in the network may be able to use the LoCation Service (LCS) feature without compromising the E-UTRAN's radio transmission or signaling capabilities.
- LCS LoCation Service
- the uncertainty of the location information depends on the method used, the location of the terminal in the coverage area and the movement of the terminal.
- the various design options of the E-UTRAN system eg cell size, adjustable antenna technology, path loss estimates, timing accuracy, eNB surveys
- Positioning functions may be used internally by EPS, by value-added network services, by the terminal itself or over the network, and by third party services.
- the function may also be necessary or used by additional emergency services, but location services may not be exclusively assigned for location services.
- Positioning methods supported by E-UTRAN include network-assisted GNSS method, downlink positioning method, enhanced cell ID (E-CID) method, and uplink positioning (uplink). There may be a positioning method, and a hybrid positioning method in which one or more of the above-described methods are simultaneously applied.
- the GNSS assisted network method is based on a terminal having a wireless receiver capable of receiving GNSS signals.
- GNSS includes Global Positioning System (GPS), Galileo, Global Navigation Satellite System (GLONASS), Space Based Augmentation Systems (SBAS), and Quasi Zenith Satellite System (QZSS).
- GPS Global Positioning System
- GLONASS Global Navigation Satellite System
- SBAS Space Based Augmentation Systems
- QZSS Quasi Zenith Satellite System
- different GNSSs may be used individually to determine the location of the terminal, or at least one system may be used in combination.
- the downlink positioning method is based on measured timing of downlink signals received from a plurality of eNBs to a UE.
- the terminal measures the timing of the received signals using assistance data received from the positioning server.
- the measurement result is used to determine the position of the terminal relative to the neighbor eNBs.
- the location of the terminal is estimated based on the knowledge of the serving eNB of the terminal and the serving cell.
- Information about the serving eNB and the serving cell may be obtained by paging, tracking area update or other methods.
- the E-CID positioning method refers to a technique that uses an additional terminal and / or E-UTRAN radio resource and other measurements to improve the terminal location estimation.
- the E-CID positioning method utilizes some of the same measurements as the measurement control system on the RRC protocol, the UE is generally not expected to make additional measurements only for positioning. For example, no separate measurement setting or measurement control message is provided for positioning, and the terminal reports valid measurements that it has rather than required to take additional measurement actions.
- the uplink positioning method also called Uplink Time Difference OF Arrival (UTDOA) is based on measurement timings of a plurality of Location Measurement Units (LMUs) for uplink signals transmitted from a terminal.
- LMUs Location Measurement Units
- the LMU measures signal reception timing using assistance data received from the positioning server, and the result of the measurement is used to estimate the position of the terminal.
- FIG. 13 is a diagram illustrating an example of a structure of a wireless communication system to which positioning of a terminal is applied according to an embodiment of the present invention.
- the MME may receive a request for a location service related to a specific target terminal from a specific entity (e.g. Global Mobile Location Center (GMLC) or terminal).
- a specific entity e.g. Global Mobile Location Center (GMLC) or terminal.
- IMS emergency call IP Multimedia Subsystem emergency call
- the MME may decide to start location service for a specific target terminal. Accordingly, the MME sends a location service request to the Evolved-Service Mobile Location Center (E-SMLC).
- E-SMLC Evolved-Service Mobile Location Center
- the E-SMLC handles location service requests.
- the E-SMLC may deliver assistance data to the target terminal to assist in terminal based and / or terminal assist positioning.
- the E-SMLC may perform positioning of the target terminal.
- the E-SMLC may deliver configuration data to selected location measurement units (LMUs). Accordingly, the E-SMLC may return the result of the location service to the MME. Meanwhile, when the location service is requested by an entity other than the MME (UE or E-SMLC), the MME may return the result to the corresponding entity.
- LMUs location measurement units
- SULP Location Platform is a Secure User Plane Location (SUPL) entity responsible for positioning on a user plane.
- location related functions are provided, and such functions may be appropriately distributed and implemented in the structure of FIG. 13. Meanwhile, referring to FIG. 14, location service related operations that may be performed between such entities.
- FIG. 14 is a diagram illustrating various procedures for location service according to an embodiment of the present invention.
- the MME When the MME receives a location service request when the terminal is in the ECM-IDLE state, the MME performs a network-induced service request to establish a signaling connection with the terminal and allocate a specific eNB. It is assumed that the terminal enters the connected state before the various procedures shown in FIG. 14 are started.
- the location service is started by a location service request of a specific entity (S1410).
- the location service request may be initiated as follows.
- the terminal may request a location service (e.g. positioning or support data delivery) to the serving MME on the NAS level (S1410a).
- a location service e.g. positioning or support data delivery
- a specific entity in an Evolved Packet Core (EPC) such as GMLC may request a location service (e.g. positioning) for a target terminal to the serving MME (S1410b).
- the serving MME for the target terminal determines whether the location service is necessary, and if necessary, may request the location service itself (S1410c). This may be for positioning the terminal at a specific location or for emergency calls.
- the MME forwards the location service request to the E-SMLC (S1420).
- the E-SMLC performs a location service procedure in response to the location service request (S1430).
- the E-SMLC may perform a location service procedure with the serving eNB of the terminal (S1430a). This may include acquiring positioning measurements or assistance data.
- the E-SMLC may perform a location service procedure with the UE (S1430b). This may include obtaining location estimation or positioning measurements or delivering location assistance data to the terminal.
- uplink positioning e.g. UTDOA
- the E-SMLC may perform location service procedures with one or more LMUs for the target terminal (S1430c). This may include obtaining a positioning measurement.
- the E-SMLC provides a location service response to the MME (S1440).
- the location service response may include the necessary results and may include, for example, a location estimate for the indicator and / or terminal indicating success or failure.
- the location service response is provided to the entity requesting the location service (S1450).
- the MME may transmit a location service response to the terminal (S1450a).
- the location service response may include a result requested or required, such as a location estimation of the terminal.
- the MME may transmit a location service response to the corresponding entity (S1450b).
- the location service response may include a result requested or required, such as a location estimation of the terminal.
- the location service response received from the E-SMLC may be used for location service (S1450c).
- the E-SMLC may interact with elements in the E-UTRAN to obtain measurement information supporting one or more position methods for all terminals.
- the E-SMLC may acquire location related information to support the downlink position method, and for this purpose, the E-SMLC may interact with an accessible eNB from an MME that is signaling with the E-SMLC.
- the information may include timing information for the eNB that is related to absolute GNSS time or timing for other eNBs.
- the information may include information about a supported cell, and for example, a Positioning Reference Signal (PRS) schedule may be included. Signaling access between the E-SMLC and the eNB may be performed through the MME maintaining signaling access with the E-SMLC and the eNB.
- PRS Positioning Reference Signal
- the E-SMLC may interact with the serving eNB of the UE to retrieve target UE configuration information for supporting the uplink positioning method.
- the configuration information may include information required from the LMU to obtain uplink time measurement.
- the E-SMLC may indicate to the serving eNB that it needs to transmit an SRS signal to the terminal for uplink positioning. If the requested resource is not available, the eNB may allocate another resource and report the resource allocation to the E-SMLC.
- the E-SMLC may also request the LMU to perform uplink time measurements and report the results.
- the terminal may transmit a signal required for uplink based terminal position measurement. It can also measure downlink signals from other resources, such as E-UTRAN and other GNSS systems. The measurement method may be determined based on the selected positioning method.
- the terminal may access the location service application, including the location service application, or via communication with the network or other applications present in the terminal.
- the location service application includes the measurement and calculation functions required to determine the location of the terminal with or without the support of the required network.
- the terminal may include an independent positioning function (e.g. GPS) and may report the result independently of the E-UTRAN transmission.
- a terminal having an independent positioning function may utilize assistance information obtained from a network.
- An eNB is an element of an E-UTRAN network that provides measurement results for location estimation and can measure radio signals for a target terminal and send the measurements to the E-SMLC.
- the eNB may perform measurement in response to the request, or may automatically perform measurement and reporting when a change in a regular or specific radio state occurs.
- the eNB may configure the terminal to transmit periodic SRS.
- the E-SMLC manages the support of location services for the target terminal, which includes positioning of the terminal and delivery of assistance data to the terminal.
- the E-SMLC may interact with the serving eNB of the terminal to obtain location measurements for the terminal. Measurement includes uplink measurement by eNB and downlink measurement by UE. Among them, downlink measurement by the UE may be provided to the eNB through another function such as support of handover.
- the E-SMLC enables the uplink positioning method and instructs the serving eNB that the UE needs to instruct the UE to transmit the SRS signal in order to obtain the target UE configuration data necessary for the LMU to calculate the timing of the signal. Interact with The E-SMLC may select the set of LMUs used for UTDOA positioning. The E-SMLC may interact with the selected LMUs to request timing measurements.
- the E-SMLC may interact with the target terminal to convey assistance data when requested or to obtain a location estimate.
- the E-SMLC may determine the positioning method to be used based on factors including the LCS client type, the required QoS, the terminal positioning capability, the positioning capability of the eNB, and the like. Accordingly, the E-SMLC may apply the positioning method to the terminal and / or serving eNB. Positioning methods include position estimation for terminal-based positioning methods and / or position measurement for terminal-assisted and network-based positioning methods. The E-SMLC may combine all received results and determine a single location estimate for the target terminal. Additional information such as the accuracy and speed of the position estimate may also be determined.
- the LMU performs the measurements and passes the measured results to the E-SMLC. All position measurements obtained by the LMU can be provided to the requested E-SMLC.
- the terminal positioning request may involve measurement by a plurality of LMUs.
- the location information is provided by the terminal when the network utilizes the measurement results of the terminal. This is because the location information related to the measurement result allows the network to perform network optimization, such as controlling / resetting network parameters that affect the location where performance degradation occurs.
- the terminal when the terminal reports the location information to the network together with the measurement result, additional battery consumption may occur.
- the terminal performs an operation for obtaining location information separately from an operation for performing measurement. Therefore, the acquisition of the location information by the terminal may be efficient in terms of power management of the terminal only when reporting of the location information is necessary.
- the power of the terminal consumed due to the location information acquisition it is possible to consider starting the location information acquisition at the moment when the report of the measurement result required for the location information acquisition of the terminal is likely to occur. As a result, when the reporting condition of the measurement result is satisfied, a case where acquisition of the position information may not be completed may occur. In this case, the terminal may report the measurement result without the location information. If measurement results are reported without location information, it can be difficult to efficiently optimize network performance.
- measurement reporting related to network performance optimization may be more important to include location information than reporting urgency. Accordingly, a method of delaying the reporting time point of the measurement result is proposed so that the acquisition of the location information is completed and reported together even if the condition for performing the measurement report is satisfied.
- 15 is a flowchart illustrating a reporting method according to an embodiment of the present invention.
- the terminal determines whether the measurement result reporting condition is satisfied (S1510).
- the terminal may determine whether the measurement result report condition is satisfied based on whether the event related to the measurement result report is satisfied.
- the event may be events A1, A2, A3, A4, A5, B1, and B2 of Table 1.
- the terminal may determine that the measurement result report condition is satisfied.
- the terminal receives the logged measurement report request message from the network when reporting the logged measurement according to the logged MDT, it may determine that the measurement result reporting condition is satisfied.
- the UE detects a connection failure (e.g. RLF, handover failure, RRC connection establishment failure, etc.)
- the UE may determine that the measurement result reporting condition is satisfied.
- the terminal receives a report request message corresponding to a connection failure (e.g. RLF, handover failure, RRC connection establishment failure, etc.) from the network, it may determine that the measurement result reporting condition is satisfied.
- a connection failure e.g. RLF, handover failure, RRC connection establishment failure, etc.
- the terminal determines whether to report the location information associated with the measurement result to the network when reporting the measurement result (S1520).
- the terminal may determine to report the location information along with the measurement result to the network.
- the terminal may determine to report the location information together with the measurement result when the reporting of the location information is possible.
- the terminal may decide to transmit the location information to the network when reporting the measurement result.
- the terminal may decide to transmit the measurement result and the location information together to the network.
- the UE may determine to transmit the location information to the network along with the measurement result related thereto in delivering a message according to a connection failure such as an RLF, a handover failure or an RRC connection establishment failure.
- a connection failure such as an RLF, a handover failure or an RRC connection establishment failure.
- the terminal attempts to acquire location information to be transmitted to the network together with the measurement result (S1530).
- the terminal may perform the above-described positioning technique for obtaining location information.
- the time point at which the terminal starts to acquire the location information is performed after the decision to report the measurement result is not limited thereto.
- the terminal may attempt to acquire the location information associated with the time of obtaining the measurement result.
- the terminal may attempt to acquire the location information after completing the acquisition of the measurement result, or may attempt to acquire the location information when the reporting condition of the measurement result is satisfied.
- the acquisition of the location information when the reporting condition of the measurement result is satisfied means that when the event related to the measurement result report is satisfied for the first time, the acquisition of the location information is attempted or the event is satisfied for a certain time after the initial satisfaction of the event related to the measurement result measurement. If the result reporting condition is satisfied, the location information acquisition may be started.
- the terminal determines whether to report the delay of the measurement result (S1540). That is, if the acquisition of the location information related to the measurement result is not completed even though the conditions for reporting the measurement result are satisfied, the terminal acquires the measurement result first or suspends the report of the measurement result and then acquires it when the acquisition of the location information is completed. Whether to report with the location information can be determined.
- the terminal may determine whether the delay report is indicated based on the separate signaling by the network.
- the network may transmit the configuration message related to the measurement result report of the terminal by including indication information indicating whether the delay of the measurement result can be reported.
- the determination of whether the terminal reports the delay of the measurement may be performed according to whether the delay report is set in advance in the terminal.
- the terminal decides to report delay and suspends the reporting of the measurement result until the position information is obtained and / or until a specific time point. Can be. Thereafter, when the acquisition of the location information is completed, a report message including a measurement result and related location information is transmitted to the network (S1550).
- the terminal transmits a report message including the measurement result to the network excluding the location information.
- the terminal may stop the current location information acquisition operation or continuously attempt to acquire the location information, and transmit the location information obtained to the network through a later report message.
- the specific time may be the maximum time allowed for the delay report.
- the maximum time may be a time set by the network, which may be included in a configuration message for reporting a measurement result of the terminal and signaled to the terminal.
- the specific time may be a specific value previously set in the terminal.
- the terminal may start a delay timer, which is a timer related to the time. If the acquisition of the location information is completed before the delay timer expires, the terminal may transmit a report message including the measurement result and the location information to the network.
- the delay timer can be initialized according to the report message. If the delay timer expires before completing the location information acquisition, the terminal may transmit a report message not including the location information to the network.
- the report message may further include information related to the reason that the location information is not included. That is, when the location information is not reported together with the network, the terminal may include the reason for not reporting the location information in the report message and transmit the same to the network. The reason may be impossible to obtain location information, a lack of time allowed for acquisition, or the like.
- the terminal may be divided into more detailed reasons, such as a case in which the terminal does not support the positioning related function and a case in which the positioning related function is supported but the location information cannot be obtained.
- the report message reported to the network by the terminal in step S1550 includes the location information
- the information indicating the positioning technique based on obtaining the location information may be further included.
- 16 is a flowchart illustrating an example of a reporting method according to an embodiment of the present invention.
- the terminal receives a measurement report setup message from the network (S1610).
- the measurement report setting message may include information indicating to report the location information together when reporting the measurement result.
- the measurement report setting message may include information indicating that the delayed measurement result report is possible.
- the terminal performs measurement and evaluation (S1610).
- the terminal obtains a measurement result by measuring a radio resource, and determines whether the measurement result reporting condition is satisfied.
- the terminal may determine whether the measurement result report condition is satisfied, based on whether an event related to the measurement result report is satisfied. If the event related to the measurement result report is satisfied, the terminal may determine that the measurement result reporting condition is satisfied.
- TTT specific time period
- the measurement result terminal does not complete the acquisition of location information related to the measurement result even though the measurement result reporting condition is satisfied, and thus suspends the measurement result report to the network.
- the terminal may start the delay timer when the measurement result report condition is satisfied.
- the information indicating the setting value of the delay timer may be included in the measurement report setting message or preset in the terminal.
- the terminal acquires location information (S1630).
- the terminal may perform an operation based on the above-described positioning technique for obtaining location information.
- the terminal transmits a measurement result report message to the network (S1640).
- the interval between the time when the measurement result report message is transmitted from the time point when the measurement result report condition is satisfied may be a delay time.
- the terminal may transmit the measurement result and related location information to the network by including the measurement result in the measurement result report message.
- the measurement result report message may further include information indicating a positioning technique on which the location information is obtained.
- the terminal may include the measurement result in the measurement result report message and transmit it to the network.
- the measurement result report message may further include information indicating a reason for not obtaining location information.
- FIG. 17 is a flowchart illustrating another example of a reporting method according to an embodiment of the present invention.
- a communication management entity including cell 1 and cell 2 may be collectively referred to as a network.
- the terminal establishes an RRC connection with the cell 1 (S1710).
- the RRC connection establishment process may be performed through the same procedure as in FIG. 5 described above.
- the terminal detects the occurrence of the RLF (S1720).
- the UE establishes an RRC connection with the cell 2 after the RLF is generated (S1730).
- the UE may perform an RRC reestablishment procedure with the cell 2.
- the UE may inform that there is an RLF report to be reported to the network through the cell 2 and the RRC reestablishment procedure.
- Cell 2 requests the RLF report from the terminal (S1740).
- the UE may determine that the measurement result report condition is satisfied.
- the UE determines that the measurement result reporting condition is satisfied, and when the acquisition of the location information related to the measurement result is completed at this point, the UE may report the measurement result and the location information to the network by including the RLF report message. However, when the acquisition of the location information is not completed when the measurement result report condition is satisfied, the terminal may suspend transmission of the RLF report message. In addition, the terminal may initiate a delay timer. In this case, the value of the delay timer may be set to a value preset in the terminal.
- the UE may transmit the measurement result and related location information to the network by including the RLF report message.
- the RLF report message may further include information indicating a positioning technique based on location information acquisition.
- the terminal may transmit the measurement result to the network by including the measurement result in the RLF report message.
- the RLF report message may further include information indicating a reason for not obtaining location information.
- the cell 2 may transmit it to the cell 1.
- the terminal may start a delay timer when the terminal detects the RLF and not when receiving the RLF report request message.
- the measurement result and the related location information may be included in the RLF report message and transmitted to the network.
- the delay timer expires, the RLF report may be delayed until the location information is obtained despite the reception of the RLF report request message.
- the terminal may start a delay timer at the time of detecting the RLF.
- the RLF report message including the location information and the measurement result may be performed before the delay timer expires from the reception of the RLF report request message.
- the terminal can minimize the power consumed to obtain the location information, and at the same time can expand the opportunity to transmit the measurement results and the associated location information in the measurement result report message. Therefore, the network can easily obtain not only the measurement result but also location information related thereto, and can improve network performance based on the measurement result. In addition, the terminal may improve battery efficiency in the measurement result report.
- FIG. 18 is a block diagram illustrating a wireless device in which an embodiment of the present invention is implemented. This device may implement the operation of a terminal and / or a network that performs the embodiments described above with reference to FIGS. 13 to 17.
- the wireless device 1800 includes a processor 1810, a memory 1820, and a radio frequency unit 1830.
- the processor 1810 implements the proposed functions, processes, and / or methods.
- the processor 1810 may be configured to perform measurement on a radio resource and to obtain location information related thereto.
- the processor 1810 may be configured to determine whether a reporting condition of a measurement result is satisfied.
- the processor 1810 may be configured to determine whether delayed reporting due to delayed location information acquisition is possible.
- the processor 1810 may be configured to determine whether to transmit the location information together with the measurement result by driving the timer.
- the processor 1810 may be configured to transmit a report message including the measurement result and / or location information to the network after the measurement result report condition is satisfied.
- the processor 1810 may be configured to implement the embodiments of the present invention described above with reference to the drawings.
- the RF unit 1830 is connected to the processor 1810 to transmit and receive a radio signal.
- the processor 1810 and the RF unit 1830 may be implemented to transmit and receive wireless signals according to at least one communication standard.
- the RF unit 1830 may include at least one transceiver capable of transmitting and receiving wireless signals.
- the processor may include application-specific integrated circuits (ASICs), other chipsets, logic circuits, and / or data processing devices.
- the memory may include read-only memory (ROM), random access memory (RAM), flash memory, memory card, storage medium and / or other storage device.
- the RF unit may include a baseband circuit for processing a radio signal.
- the above-described technique may be implemented as a module (process, function, etc.) for performing the above-described function.
- the module may be stored in memory and executed by a processor.
- the memory may be internal or external to the processor and may be coupled to the processor by various well known means.
Abstract
Description
이벤트 | 보고 조건 |
Event A1 | Serving becomes better than threshold |
Event A2 | Serving becomes worse than threshold |
Event A3 | Neighbour becomes offset better than serving |
Event A4 | Neighbour becomes better than threshold |
Event A5 | Serving becomes worse than threshold1 and neighbour becomes better than threshold2 |
Event B1 | Inter RAT neighbour becomes better than threshold |
Event B2 | Serving becomes worse than threshold1 and inter RAT neighbour becomes better than threshold2 |
Claims (18)
- 무선 통신 시스템에서 단말에 의해 수행되는 보고 방법에 있어서,
측정 결과를 획득하고;
상기 측정 결과와 관련된 위치 정보의 획득을 시도하고;
지연 타이머를 개시하고; 및
상기 지연 타이머 만료 이전에 상기 위치 정보의 획득이 완료되면, 상기 측정 결과 및 상기 획득된 위치 정보를 포함하는 보고 메시지를 네트워크로 전송하는 것;을 포함하는 보고 방법. - 제 1항에 있어서, 상기 방법은,
상기 지연 타이머 만료 전에 상기 위치 정보를 획득하지 못하면, 상기 측정 결과를 포함하는 보고 메시지를 상기 네트워크로 전송하는 것을 더 포함함을 특징으로 하는 보고 방법. - 제 2항에 있어서,
상기 지연 타이머 만료 전에 상기 위치 정보를 획득하지 못하면, 상기 보고 메시지는 상기 위치 정보를 획득하지 못한 이유와 관련된 정보를 더 포함하는 것을 특징으로 하는 보고 방법. - 제 3항에 있어서,
상기 지연 타이머 만료 전에 상기 위치 정보의 획득이 완료되면, 상기 보고 메시지는 상기 위치 정보 획득의 기반이된 포지셔닝 기법을 지시하는 정보를 더 포함함을 특징으로 하는 보고 방법. - 제 1항에 있어서, 상기 방법은
RLF(Radio Link Failure) 발생을 감지하고;
상기 RLF 발생에 따른 RLF 보고가 유효함을 네트워크로 보고하고; 및
상기 RLF 보고를 보고할 것을 요청하는 RLF(Radio Link Failure) 보고 요청 메시지를 네트워크로부터 수신하는 것;을 더 포함하되,
상기 보고 메시지는 상기 RLF 보고 요청 메시지에 대응한 RLF 보고 메시지인 것을 특징으로 하는 보고 방법. - 제 5항에 있어서,
상기 지연 타이머는 상기 RLF 발생 감지시에 개시되고,
상기 지연 타이머는 상기 단말에 미리 설정된 값으로 설정되는 것을 특징으로 하는 보고 방법. - 제 5항에 있어서,
상기 지연 타이머는 상기 RLF 보고 요청 메시지의 수신시에 개시되고,
상기 지연 타이머는 상기 단말에 미리 설정된 값으로 설정되는 것을 특징으로 하는 보고 방법. - 제 1항에 있어서, 상기 방법은,
측정 보고 설정 메시지를 수신하고; 및
측정 결과 보고 조건의 만족 여부를 결정하는 것;을 더 포함하되,
상기 측정 보고 설정 메시지는 상기 측정 결과 보고 조건이 만족된 시점으로부터 특정 기간 내에 보고 메시지를 전송하는 것이 허용됨을 지시하는 지연 보고 지시 정보를 포함하는 것을 특징으로 하는 보고 방법. - 제 8항에 있어서,
상기 특정 기간은 상기 지연 타이머의 구동 지속시간이고,
상기 지연 타이머는 상기 측정 결과 보고 조건이 만족된 시점에 개시되고,
상기 측정 보고 설정 메시지는 상기 지연 타이머의 설정 값을 지시하는 지연 타이머 설정 정보를 포함함을 특징으로 하는 보고 방법. - 무선 통신 시스템에서 동작하는 무선 장치에 있어서, 상기 무선 장치는
무선 신호를 송신 및 수신하는 RF(Radio Frequency)부 및;
상기 RF 부와 기능적으로 결합하여 동작하는 프로세서;를 포함하되, 상기 프로세서는,
측정 결과를 획득하고,
상기 측정 결과와 관련된 위치 정보를 획득을 시도하고,
지연 타이머를 개시하고, 및
상기 지연 타이머 만료 이전에 상기 위치 정보의 획득이 완료되면, 상기 측정 결과 및 상기 획득된 위치 정보를 포함하는 보고 메시지를 네트워크로 전송하도록 설정되는 것을 특징으로 하는 무선 장치. - 제 10항에 있어서, 상기 프로세서는,
상기 지연 타이머 만료 전에 상기 위치 정보를 획득하지 못하면, 상기 측정 결과를 포함하는 보고 메시지를 상기 네트워크로 전송하도록 설정되는 것을 특징으로 하는 무선 장치. - 제 11항에 있어서,
상기 지연 타이머 만료 전에 상기 위치 정보를 획득하지 못하면, 상기 보고 메시지는 상기 위치 정보를 획득하지 못한 이유와 관련된 정보를 더 포함하는 것을 특징으로 하는 무선 장치. - 제 12항에 있어서,
상기 지연 타이머 만료 전에 상기 위치 정보의 획득이 완료되면, 상기 보고 메시지는 상기 위치 정보 획득의 기반이된 포지셔닝 기법을 지시하는 정보를 더 포함함을 특징으로 하는 무선 장치. - 제 10항에 있어서, 상기 프로세서는
RLF(Radio Link Failure) 발생을 감지하고,
상기 RLF 발생에 따른 RLF 보고가 유효함을 네트워크로 보고하고, 및
상기 RLF 보고를 보고할 것을 요청하는 RLF(Radio Link Failure) 보고 요청 메시지를 네트워크로부터 수신하도록 설정되되,
상기 보고 메시지는 상기 RLF 보고 요청 메시지에 대응한 RLF 보고 메시지인 것을 특징으로 하는 무선 장치. - 제 14항에 있어서,
상기 지연 타이머는 상기 RLF 발생 감지시에 개시되고,
상기 지연 타이머는 상기 무선 장치에 미리 설정된 값으로 설정되는 것을 특징으로 하는 무선 장치. - 제 14항에 있어서,
상기 지연 타이머는 상기 RLF 보고 메시지의 수신시에 개시되고,
상기 지연 타이머는 상기 무선 장치에 미리 설정된 값으로 설정되는 것을 특징으로 하는 무선 장치. - 제 10항에 있어서, 상기 프로세서는,
측정 보고 설정 메시지를 수신하고, 및
측정 결과 보고 조건의 만족 여부를 결정하도록 설정되되,
상기 측정 보고 설정 메시지는 상기 측정 결과 보고 조건이 만족된 시점으로부터 특정 기간 내에 보고 메시지를 전송하는 것이 허용됨을 지시하는 지연 보고 지시 정보를 포함하는 것을 특징으로 하는 무선 장치. - 제 17항에 있어서,
상기 특정 기간은 상기 지연 타이머의 구동 지속시간이고,
상기 지연 타이머는 상기 측정 결과 보고 조건이 만족된 시점에 개시되고,
상기 측정 보고 설정 메시지는 상기 지연 타이머의 설정 값을 지시하는 지연 타이머 설정 정보를 포함함을 특징으로 하는 무선 장치.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/373,876 US9838897B2 (en) | 2012-01-26 | 2013-01-25 | Method for reporting in wireless communication system and apparatus therefor |
KR1020147020545A KR101616253B1 (ko) | 2012-01-26 | 2013-01-25 | 무선 통신 시스템에서 보고 방법 및 이를 지원하는 장치 |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201261591242P | 2012-01-26 | 2012-01-26 | |
US61/591,242 | 2012-01-26 | ||
US201261592511P | 2012-01-30 | 2012-01-30 | |
US61/592,511 | 2012-01-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2013111997A1 true WO2013111997A1 (ko) | 2013-08-01 |
Family
ID=48873678
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/KR2013/000622 WO2013111997A1 (ko) | 2012-01-26 | 2013-01-25 | 무선 통신 시스템에서 보고 방법 및 이를 지원하는 장치 |
Country Status (3)
Country | Link |
---|---|
US (1) | US9838897B2 (ko) |
KR (1) | KR101616253B1 (ko) |
WO (1) | WO2013111997A1 (ko) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015115782A1 (en) * | 2014-01-30 | 2015-08-06 | Lg Electronics Inc. | Method and apparatus for supporting minimization of drive tests for radio access network sharing in wireless communication system |
EP3171638A4 (en) * | 2014-07-18 | 2018-03-21 | Samsung Electronics Co., Ltd. | Method and apparatus for improving handover success rate |
WO2019031943A1 (en) * | 2017-08-11 | 2019-02-14 | Lg Electronics Inc. | METHOD OF REPORTING A MEASUREMENT RESULT AND DEVICE SUPPORTING THE METHOD |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9596616B2 (en) * | 2013-09-30 | 2017-03-14 | Telefonaktiebolaget L M Ericsson (Publ) | Enhancement on radio link failure report to record necessary timing details for a dual-threshold handover trigger event |
US20150281989A1 (en) * | 2014-04-01 | 2015-10-01 | Qualcomm Incorporated | Delaying transmission of measurement report |
JP6449841B2 (ja) * | 2016-12-27 | 2019-01-09 | Kddi株式会社 | 端末装置、測定システム、測定方法、及びコンピュータプログラム |
US11350321B2 (en) * | 2017-07-20 | 2022-05-31 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Measurement configuration method and related product |
CN109842924B (zh) | 2017-11-27 | 2021-01-12 | 维沃移动通信有限公司 | 一种位置获取的控制方法、用户终端和装置 |
EP3771232B1 (en) * | 2018-03-28 | 2023-08-16 | Beijing Xiaomi Mobile Software Co., Ltd. | Information reporting and configuration method and device, user equipment and base station |
US11653241B2 (en) * | 2018-06-01 | 2023-05-16 | Telefonaktiebolaget Lm Ericsson (Publ) | Reporting performance degradation in a communications system |
EP3846544B1 (en) * | 2019-01-28 | 2023-10-25 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Wireless communication method, terminal device and network device |
KR20200099000A (ko) * | 2019-02-13 | 2020-08-21 | 삼성전자주식회사 | 무선 통신 시스템에서 캐리어 어그리게이션을 지원하기 위한 방법 및 장치 |
US10999755B1 (en) | 2019-10-19 | 2021-05-04 | Skylo Technologies, Inc. | Data package selection for data reporting of one or more data sources |
WO2021194825A1 (en) * | 2020-03-26 | 2021-09-30 | Qualcomm Incorporated | Methods and apparatuses for postponed reporting of at least one positioning state information (psi) report element |
US11770791B2 (en) | 2020-04-03 | 2023-09-26 | Qualcomm Incorporated | Positioning measurement data reported via L1 or L2 signaling |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20100088085A (ko) * | 2009-01-29 | 2010-08-06 | 엘지전자 주식회사 | 이동 통신 시스템에서 전송이 억제된 측정 결과를 모아서 보고하는 방법 |
WO2010151064A2 (en) * | 2009-06-24 | 2010-12-29 | Lg Electronics Inc. | Method of transmitting measurement report in wireless communication system |
Family Cites Families (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6236365B1 (en) * | 1996-09-09 | 2001-05-22 | Tracbeam, Llc | Location of a mobile station using a plurality of commercial wireless infrastructures |
WO2005074312A1 (en) * | 2004-02-02 | 2005-08-11 | Electronics And Telecommunications Research Institute | A method for requesting and reporting channel quality information in wireless portable internet system |
US7974639B2 (en) * | 2005-02-04 | 2011-07-05 | Qualcomm Incorporated | Method and apparatus for performing position determination with a short circuit call flow |
KR101133850B1 (ko) | 2005-10-10 | 2012-04-06 | 삼성전자주식회사 | 위치 서비스 제공 시스템의 단말 및 서버와 그 방법 |
KR100922101B1 (ko) | 2005-11-23 | 2009-10-16 | 엘지전자 주식회사 | 위치 정보 시스템에서의 측위 방식 대체방법 |
US8830818B2 (en) * | 2007-06-07 | 2014-09-09 | Qualcomm Incorporated | Forward handover under radio link failure |
JP5234004B2 (ja) * | 2007-11-09 | 2013-07-10 | 日本電気株式会社 | 無線通信システム及び方法並びにプログラム |
KR20090056232A (ko) | 2007-11-30 | 2009-06-03 | 포스데이타 주식회사 | 광대역 무선 접속 통신 시스템에서 위치 기반 서비스 제공시스템 및 방법 |
US8780732B2 (en) * | 2008-03-18 | 2014-07-15 | Qualcomm Incorporated | Method of network management by assistance from terminal using control-plane signaling between terminal and network |
JP5538802B2 (ja) * | 2008-11-04 | 2014-07-02 | 三菱電機株式会社 | 通信方法、移動体通信システム、移動端末および基地局制御装置 |
EP2356834B1 (en) * | 2008-11-11 | 2013-09-18 | Telefonaktiebolaget LM Ericsson (publ) | Method for sending emergency messages to mobile terminals |
WO2010071345A2 (en) * | 2008-12-15 | 2010-06-24 | Lg Electronics Inc. | Method of location update in a wireless communication system |
WO2010083006A2 (en) * | 2009-01-16 | 2010-07-22 | Rambus Inc. | Methods and circuits for detecting and reporting high-energy particles using mobile phones and other portable computing devices |
US8295165B2 (en) * | 2009-07-27 | 2012-10-23 | Lg Electronics Inc. | Apparatus and method for handling radio link failure in wireless communication system |
KR101674222B1 (ko) | 2010-02-09 | 2016-11-09 | 엘지전자 주식회사 | 무선 통신 시스템에서 로그된 측정 보고 방법 및 장치 |
US8577360B2 (en) * | 2010-04-12 | 2013-11-05 | Telefonaktiebolaget Lm Ericsson (Publ) | UE-based MDT measuring and reporting in a cellular radio access network |
US8594657B2 (en) | 2010-06-15 | 2013-11-26 | Htc Corporation | Method for reporting MDT log and mobile communication device utilizing the same |
US9668154B2 (en) * | 2010-09-21 | 2017-05-30 | Kyocera Corporation | Radio measurement collection method and radio terminal |
GB2484117A (en) * | 2010-09-30 | 2012-04-04 | Fujitsu Ltd | Automated network coverage hole detection by systematically modifying a connection reestablishment timer (T311) in a number of UEs |
KR20130081289A (ko) * | 2010-10-04 | 2013-07-16 | 교세라 가부시키가이샤 | 이동통신방법, 무선단말, 및 기지국 |
CN103190169B (zh) * | 2010-11-30 | 2016-03-30 | 富士通株式会社 | 报告无线链路失败信息的方法、终端设备和基站 |
CN103959845B (zh) * | 2011-09-30 | 2019-02-01 | 诺基亚通信公司 | 降低无线网络中的无线电链路失效数据量的方法和装置 |
US20130095819A1 (en) * | 2011-10-18 | 2013-04-18 | Qualcomm Incorporated | Method and apparatus for performing neighboring cell measurements in wireless networks |
-
2013
- 2013-01-25 KR KR1020147020545A patent/KR101616253B1/ko not_active IP Right Cessation
- 2013-01-25 WO PCT/KR2013/000622 patent/WO2013111997A1/ko active Application Filing
- 2013-01-25 US US14/373,876 patent/US9838897B2/en active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20100088085A (ko) * | 2009-01-29 | 2010-08-06 | 엘지전자 주식회사 | 이동 통신 시스템에서 전송이 억제된 측정 결과를 모아서 보고하는 방법 |
WO2010151064A2 (en) * | 2009-06-24 | 2010-12-29 | Lg Electronics Inc. | Method of transmitting measurement report in wireless communication system |
Non-Patent Citations (3)
Title |
---|
NTT DOCOMO, INC.: "Summary of email discussion [71#51] UMTS/LTE: MDT - Potential enhancements related to location info reporting", 3GPP TSG-RAN2 #7LBIS, R2-105738, 15 October 2010 (2010-10-15) * |
NTT DOCOMO, INC.: "Validity of location information for Immediate MDT", 3GPP TSG- RAN2#72, R2-106313, 19 November 2010 (2010-11-19) * |
NTT DOCOMO, INC.: "Validity time of location information for Immediate MDT", 3GPP TSG-RAN2#72BIS, R2-110281, 21 January 2011 (2011-01-21) * |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015115782A1 (en) * | 2014-01-30 | 2015-08-06 | Lg Electronics Inc. | Method and apparatus for supporting minimization of drive tests for radio access network sharing in wireless communication system |
US9888403B2 (en) | 2014-01-30 | 2018-02-06 | Lg Electronics Inc. | Method and apparatus for supporting minimization of drive tests for radio access network sharing in wireless communication system |
EP3171638A4 (en) * | 2014-07-18 | 2018-03-21 | Samsung Electronics Co., Ltd. | Method and apparatus for improving handover success rate |
US10154444B2 (en) | 2014-07-18 | 2018-12-11 | Samsung Electronics Co., Ltd. | Method and apparatus for improving handover success rate |
WO2019031943A1 (en) * | 2017-08-11 | 2019-02-14 | Lg Electronics Inc. | METHOD OF REPORTING A MEASUREMENT RESULT AND DEVICE SUPPORTING THE METHOD |
US11096103B2 (en) | 2017-08-11 | 2021-08-17 | Lg Electronics Inc. | Method for reporting measurement result and device supporting the same |
Also Published As
Publication number | Publication date |
---|---|
KR20140123501A (ko) | 2014-10-22 |
US9838897B2 (en) | 2017-12-05 |
US20140370914A1 (en) | 2014-12-18 |
KR101616253B1 (ko) | 2016-04-28 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US9420451B2 (en) | Method for limited positioning-based reporting in wireless communication system and apparatus therefor | |
KR102077746B1 (ko) | 무선 통신 시스템에서 측정 보고 방법 및 이를 지원하는 장치 | |
KR101616253B1 (ko) | 무선 통신 시스템에서 보고 방법 및 이를 지원하는 장치 | |
KR101584463B1 (ko) | 무선 통신 시스템에서 위치 정보를 함께 보고하는 방법 및 이를 지원하는 장치 | |
WO2013172612A1 (ko) | 무선 통신 시스템에서 가변적 포지셔닝 기반 보고 방법 및 이를 지원하는 장치 | |
WO2013169030A1 (ko) | 무선 통신 시스템에서 상관성 유효 평가 및 이를 기반으로 한 보고 방법 및 장치 | |
EP2922334B1 (en) | Method of reporting measurement in wireless communication system and device for supporting said method | |
US9713115B2 (en) | Method for reporting positioning status in a wireless communication system and apparatus therefor | |
KR102038001B1 (ko) | 무선 통신 시스템에서 보고 방법 및 이를 지원하는 장치 | |
KR101637797B1 (ko) | 무선 통신 시스템에서 위치 정보 처리 방법 및 이를 지원하는 장치 | |
WO2013169027A1 (ko) | 무선 통신 시스템에서 위치 추정 기반 정보 보고 및 위치 추정을 위한 방법과 이를 지원하는 장치 | |
US20150024788A1 (en) | Method for processing location information in wireless communication system and apparatus for supporting same |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 13741375 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 20147020545 Country of ref document: KR Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 14373876 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 13741375 Country of ref document: EP Kind code of ref document: A1 |