WO2012138094A2 - 위치 정보 전송 방법 및 사용자기기 - Google Patents
위치 정보 전송 방법 및 사용자기기 Download PDFInfo
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- WO2012138094A2 WO2012138094A2 PCT/KR2012/002476 KR2012002476W WO2012138094A2 WO 2012138094 A2 WO2012138094 A2 WO 2012138094A2 KR 2012002476 W KR2012002476 W KR 2012002476W WO 2012138094 A2 WO2012138094 A2 WO 2012138094A2
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- location information
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- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
- H04W8/08—Mobility data transfer
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/32—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
- H04W52/0216—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave using a pre-established activity schedule, e.g. traffic indication frame
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
- H04W52/0241—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where no transmission is received, e.g. out of range of the transmitter
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities
- H04W8/24—Transfer of terminal data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Definitions
- the present invention relates to a wireless communication system, and more particularly, to a method and apparatus for transmitting location information regarding coverage of a cell to a network, and a method and apparatus for receiving the location information.
- 3GPP LTE 3rd Generation Partnership Project Long Term Evolution
- E-UMTS Evolved Universal Mobile Telecommunications System
- UMTS Universal Mobile Telecommunications System
- LTE Long Term Evolution
- TS Technical Specification
- an E-UMTS is located at an end of a user equipment (UE), a base station (eNode B, eNB), and a network (E-UTRAN (Evolved Universal Terrestrial Radio Access Network)). It includes an access gateway (AG) connected to the.
- the base station may transmit multiple data streams simultaneously for broadcast service, multicast service and / or unicast service.
- One base station manages one or more cells.
- the cell is set to one of bandwidths such as 1.25, 2.5, 5, 10, 15, and 20 MHz to provide downlink or uplink transmission service to one or more UEs. Different cells may be configured to provide different bandwidths.
- the base station controls data transmission / reception for one or more UEs.
- For downlink (DL) data the base station transmits downlink scheduling information to inform the corresponding UE of time / frequency domain, encoding, data size, and HARQ (Hybrid Automatic Repeat and reQuest) related information.
- the base station transmits uplink scheduling information to the corresponding UE for uplink (UL) data, and informs the time / frequency domain, encoding, data size, HARQ related information, etc.
- DL downlink
- HARQ Hybrid Automatic Repeat and reQuest
- Core network may be composed of a network node for the user registration of the AG and the UE.
- the AG manages mobility of the UE in units of a tracking area consisting of a plurality of cells.
- Wireless communication technology has been developed up to 3GPP LTE (-A) based on WCDMA, but the demands and expectations of users and operators are continuously increasing.
- new technological evolution is required to be competitive in the future. Reduced cost per bit, increased service availability, the use of flexible frequency bands, simplicity and open interfaces, and adequate power consumption of the UE.
- the present invention provides a method and apparatus for transmitting location information regarding coverage of a cell to a network, and a method and apparatus for receiving the location information.
- the user equipment when the user equipment transmits location information to a network, detecting a proximity of a cell to which the user equipment stays (hereinafter, a serving cell); Obtaining a location of the user device; And transmitting the location information indicating the obtained location to the network.
- a serving cell a cell to which the user equipment stays
- a radio frequency (RF) unit configured to transmit / receive a radio signal when a user equipment transmits location information to a network in a wireless communication system; And a processor configured to control the RF unit, wherein the processor is configured to detect proximity of a cell different from a cell (hereinafter serving cell) in which the user equipment resides, and to obtain a location of the user equipment. And controlling the RF unit to transmit location information indicating the obtained location to the network.
- RF radio frequency
- the serving cell may be a cell deployed by the network operator and the other cell may be a cell not deployed by the network operator.
- the other cell may be a closed subscriber group (CSG) cell.
- CSG closed subscriber group
- the position may be measured during entry into the vicinity of the other cell or during departure from the vicinity of the other cell.
- the location information may be transmitted to the network by being included in a proximity indication message used to indicate that the user equipment enters or leaves the vicinity of the other cell.
- a positioning request may be received from the network, and the location information may be transmitted to the network through a base station of the serving cell in response to the positioning request.
- the location information may be transmitted to the network by being included in a neighbor indication message used to indicate that the user equipment enters or leaves the vicinity of the other cell through the base station of the serving cell. Can be.
- the network can easily grasp the coverage of a specific cell.
- FIG. 1 is a diagram schematically illustrating an E-UMTS network structure as an example of a wireless communication system.
- E-UTRAN Evolved Universal Terrestrial Radio Access Network
- FIG. 3 is a diagram illustrating a control plane and a user plane of a radio interface protocol between a UE and an E-UTRAN based on the 3GPP radio access network standard.
- FIG. 4 is a diagram illustrating a general transmission and reception method using a call message.
- FIG. 5 is a diagram illustrating inbound mobility in which a user equipment moves from a macro cell to a femto cell according to an embodiment of the present invention.
- FIG. 6 is a diagram illustrating outbound mobility in which a user equipment moves from a femto cell to a macro cell according to an embodiment of the present invention.
- FIG. 7 is a block diagram showing the components of the transmitter 10 and the receiver 20 for carrying out the present invention.
- each component or feature may be considered to be optional unless otherwise stated.
- Each component or feature may be embodied in a form that is not combined with other components or features.
- some components and / or features may be combined to form an embodiment of the present invention.
- the order of the operations described in the embodiments of the present invention may be changed. Some components or features of one embodiment may be included in another embodiment or may be replaced with corresponding components or features of another embodiment.
- the eNB has a meaning as a terminal node of a network that directly communicates with the UE.
- Certain operations described as performed by the eNB herein may be performed by an upper node of the eNB in some cases. That is, it is apparent that various operations performed for communication with the UE in a network consisting of a plurality of network nodes including an eNB may be performed by the eNB or other network nodes other than the eNB.
- An 'eNode B (eNB)' may be replaced by terms such as a fixed station, a base station (BS), a Node B, and an access point (AP).
- the repeater may be replaced by terms such as a relay node (RN) and a relay station (RS).
- RN relay node
- RS relay station
- 'UE' may be replaced with terms such as a terminal, a mobile station (MS), a mobile subscriber station (MSS), and a subscriber station (SS).
- Embodiments of the present invention may be supported by standard documents disclosed in at least one of the wireless access systems IEEE 802 system, 3GPP system, 3GPP LTE and 3GPP LTE-Advanced (LTE-A) system and 3GPP2 system. That is, steps or parts which are not described to clearly reveal the technical spirit of the present invention among the embodiments of the present invention may be supported by the above documents. In addition, all terms disclosed in the present document can be described by the above standard document.
- CDMA code division multiple access
- FDMA frequency division multiple access
- TDMA time division multiple access
- OFDMA orthogonal frequency division multiple access
- SC-FDMA single carrier frequency division multiple access
- CDMA may be implemented with a radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000.
- TDMA may be implemented with wireless technologies such as Global System for Mobile communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rates for GSM Evolution (EDGE).
- GSM Global System for Mobile communications
- GPRS General Packet Radio Service
- EDGE Enhanced Data Rates for GSM Evolution
- OFDMA may be implemented in a wireless technology such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, Evolved UTRA (E-UTRA).
- UTRA is part of the Universal Mobile Telecommunications System (UMTS).
- 3rd Generation Partnership Project (3GPP) long term evolution (LTE) is part of an Evolved UMTS (E-UMTS) using E-UTRA, and employs OFDMA in downlink and SC-FDMA in uplink.
- LTE-A Advanced
- WiMAX can be described by the IEEE 802.16e standard (WirelessMAN-OFDMA Reference System) and the advanced IEEE 802.16m standard (WirelessMAN-OFDMA Advanced system).
- WiMAX can be described by the IEEE 802.16e standard (WirelessMAN-OFDMA Reference System) and the advanced IEEE 802.16m standard (WirelessMAN-OFDMA Advanced system).
- WiMAX can be described by the IEEE 802.16e standard (WirelessMAN-OFDMA Reference System) and the advanced IEEE 802.16m standard (WirelessMAN-OFDMA Advanced system).
- the following description focuses on the 3GPP LTE (-A) standard, but the technical spirit
- a cell refers to a certain geographic area where a communication service is provided by one eNB or one antenna group.
- communicating with a specific cell may mean communicating with an eNB or an antenna group that provides a communication service to the specific cell.
- the downlink / uplink signal of a specific cell means a signal received / transmitted from / to an eNB or an antenna group of the specific cell.
- E-UTRAN Evolved Universal Terrestrial Radio Access Network
- the 3GPP LTE system is a mobile communication system evolved from the UMTS system. As shown in FIG. 2, the 3GPP LTE system structure can be broadly classified into an Evolved UMTS Terrestrial Radio Access Network (E-UTRAN) and an Evolved Packet Core (EPC).
- the E-UTRAN includes a user equipment (UE) and an evolved NodeB (eNB), and is referred to as a Uu interface between the UE and the eNB, and an X2 interface between the eNB and the eNB.
- the EPC consists of a Mobility Management Entity (MME) that handles the control plane and a Serving Gateway (S-GW) that handles the user plane.
- MME Mobility Management Entity
- S-GW Serving Gateway
- the S1-MME interface is used between the eNB and the MME.
- the eNB and the S-GW are called S1-U interfaces, and they are collectively called S1 interfaces.
- the radio interface protocol (Radio Interface Protocol) is defined in the Uu interface, which is a radio section, and consists of a physical layer, a data link layer, and a network layer horizontally. Is divided into a user plane for user data transmission and a control plane for signaling (control signal) transmission.
- This air interface protocol is based on the lower three layers of the Open System Interconnection (OSI) reference model, which is widely known in communication systems.
- OSI Open System Interconnection
- L2 Layer 2
- MAC Medium Access Control
- RLC Radio Link Control
- PDCP Protocol Data Convergence Protocol
- L3 Layer 3
- RRC Radio Resource Control
- the E-UTRAN may include a home eNB (HeNB) and may deploy a HeNB-GW (HeNB Gateway) for the HeNB.
- HeNBs are connected to the EPC or directly to the EPC via the HeNB GW.
- HeNB GW is recognized as a normal cell to MME
- HeNB GW is recognized as MME to HeNB. Therefore, the HeNB and the HeNB GW are connected by the S1 interface, and the HeNB GW and the EPC are also connected by the S1 interface.
- the HeNB and the EPC are directly connected, they are connected to the S1 interface.
- a HeNB is an eNB of a type that can be installed in an area covered by a macro eNB or non-overlay in a shaded area that the macro eNB does not cover.
- HeNB has a lower radio transmission power compared to an eNB owned by a mobile operator. Accordingly, the coverage provided by the HeNB is generally smaller than the coverage provided by the eNB. For this reason, HeNB is also called a micro eNB.
- a pico eNB, a femto eNB, a relay, and the like may be a micro eNB.
- the micro eNB is a small version of the macro eNB, which can operate independently while performing most of the functions of the macro eNB, and accommodates fewer UEs with narrower coverage and lower transmit power than the macro eNB.
- a network in which the macro eNB and the micro eNB coexist is called a heterogeneous network, and a network consisting of only the macro eNBs or a network consisting of the micro eNBs is homogeneous. network).
- RAT Radio Access Technology
- a pico eNB, a femto eNB, a home eNB (HeNB), a relay, and the like may be a micro eNB, and the geographic area where the communication service is provided by the micro eNB is a micro cell ( cell, pico cell, femto cell, and so on.
- FIG. 3 is a diagram illustrating a control plane and a user plane of a radio interface protocol between a UE and an E-UTRAN based on the 3GPP radio access network standard.
- a physical layer which is a first layer, provides an information transfer service to a higher layer using a physical channel.
- the PHY layer is connected to the upper MAC layer through a transport channel, and data is transferred between the MAC layer and the PHY layer through this transport channel.
- the transport channel is largely divided into a dedicated transport channel and a common transport channel according to whether the channel is shared. Then, data is transferred between different PHY layers, that is, between PHY layers of a transmitting side and a receiving side through a physical channel using radio resources.
- the media access control (MAC) layer serves to map various logical channels to various transport channels, and also plays a role of logical channel multiplexing to map multiple logical channels to one transport channel.
- the MAC layer is connected to a radio link control (RLC) layer, which is a higher layer, by a logical channel, and the logical channel is a control channel that transmits information on the control plane according to the type of information to be transmitted. And traffic channel for transmitting information of user plane.
- RLC radio link control
- the RLC layer of the second layer performs segmentation and concatenation of data received from the upper layer to adjust the data size so that the lower layer is suitable for transmitting data in a wireless section.
- RB radio bearer
- TM Transparent Mode
- UM Un-acknowledged Mode
- AM Acknowledged Mode, Response mode
- AM RLC performs a retransmission function through an Automatic Repeat and Request (ARQ) function for reliable data transmission.
- ARQ Automatic Repeat and Request
- the packet data convergence protocol (PDCP) layer of the second layer uses an IP packet header size that contains relatively large and unnecessary control information for efficient transmission in a wireless bandwidth where bandwidth is small when transmitting an IP packet such as IPv4 or IPv6. It performs header compression function which reduces. This transmits only the necessary information in the header portion of the data, thereby increasing the transmission efficiency of the radio section.
- the PDCP layer also performs a security function, which is composed of encryption (Ciphering) to prevent data interception and third party data manipulation integrity (Integrity protection).
- the radio resource control (RRC) layer located at the top of the third layer is defined only in the control plane and is associated with configuration, re-configuration, and release of radio bearers (RBs).
- RB radio bearer
- the radio bearer (RB) refers to a logical path provided by the first and second layers of the radio protocol for data transmission between the UE and the UTRAN, and in general, the establishment of the RB means that the radio required to provide a specific service is provided. It is a procedure to define the characteristics of the protocol layer and channel, and to set each specific parameter and operation method.
- RB is divided into SRB (Signaling RB) and DRB (Data RB).
- SRB is used as a channel for transmitting RRC messages in the control plane
- DRB is used as a channel for transmitting user data in the user plane.
- Each cell served by an eNB provides downlink or uplink transmission service to one or more UEs.
- the downlink transport channel transmitted from the network to the UE includes a broadcast channel (BCH) for transmitting system information, a paging channel (PCH) for transmitting a paging message, and a 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).
- BCH broadcast channel
- PCH paging channel
- SCH shared channel
- the uplink transmission channel for transmitting data from the UE to the network includes a random access channel (RAC) for transmitting an initial control message and an uplink shared channel (SCH) for transmitting user traffic or a control message. It is located above the transport channel, and the logical channel mapped to the transport channel is a broadcast control channel (BCCH), a paging control channel (PCCH), a common control channel (CCCH), a multicast control channel (MCCH), and an MTCH (multicast). Traffic Channel).
- BCCH broadcast control channel
- PCCH paging control channel
- CCCH common control channel
- MCCH multicast control channel
- MTCH multicast
- the Non Access Stratum (NAS) layer is defined only in the control plane of the UE and the MME.
- Non Access Stratum (NAS) control protocol is terminated at the MME on the network side, and Evolved Packet System (EPS) bearer management, authentication, EPS connection management (ECM-IDLE) movement (ECM-IDLE) movement ( mobility handling, call origination in ECM-idle state, and security control.
- EPS Evolved Packet System
- ECM-IDLE EPS connection management
- ECM-IDLE Evolved Packet System
- ECM-IDLE EPS connection management
- ECM-IDLE mobility handling, call origination in ECM-idle state, and security control.
- Two states are defined to manage mobility of the UE in the NAS layer: EMM-REGISTERED (EPS Mobility Management-REGISTERED) and EMM-DEREGISTERED. Both states apply to the UE and the MME.
- the initial UE is in an EMM-deregistered state, and the UE performs a procedure of registering with the network through an initial attach procedure to access the network. If the attach procedure is successfully performed, the UE and MME are in an EMM-registered state.
- ECM-Idle state In order to manage the signaling connection between the UE and the EPC, ECM-Idle state and ECM-CONNECTED state (ECM-CONNECTED) is defined, these two states are applied to the UE and MME.
- ECM-CONNECTED ECM-CONNECTED
- MME Mobility Management Entity
- the UE in the ECM-Idle state performs UE-based mobility-related procedures such as cell selection or reselection without having to receive a command from the network.
- the UE when the UE is in the ECM-connected state, the movement of the UE is managed by the command of the network. If the position of the UE in the ECM-Idle state is different from the position known by the network, the UE informs the network of the corresponding position of the UE through a tracking area (TA) update procedure.
- TA tracking area
- the RRC state refers to whether or not the RRC of the UE has a logical connection with the RRC of the E-UTRAN. If connected, the RRC connected state (RRC_CONNECTED), and if not connected, the RRC idle state (RRC_IDLE). It is called.
- the UE when a user first powers up a UE, the UE first searches for an appropriate cell and then stays in an RRC dormant state in that cell.
- the UE of the RRC idle state cannot be identified in the cell unit, and is managed by the CN (Core Network) in the unit of a larger area than the cell.
- the RRC dormant UE may receive broadcast system information and call information while performing discontinuous reception (DRX) configured by the NAS, and may be assigned an identifier that uniquely identifies the UE in the TA. have.
- the UE in the RRC dormant state may perform Public Land Mobile Network (PLMN) selection and reselection.
- PLMN Public Land Mobile Network
- an RRC idle UE In order to receive a service such as voice or data from a cell, an RRC idle UE needs to transition to an RRC connected state. When the UE staying in the RRC idle state needs to establish an RRC connection, the UE transitions to the RRC connection state by performing an RRC connection establishment procedure with the RRC of the E-UTRAN. In this case, it is necessary to establish an RRC connection, for example, when an uplink data transmission is necessary due to a user's call attempt or when a call message is received from the E-UTRAN. Can be.
- FIG. 4 is a diagram illustrating a general transmission and reception method using a call message.
- the paging message includes a paging record composed of a paging cause, a UE identity, and the like.
- the UE may perform discontinuous reception (DRX) for the purpose of reducing power consumption.
- DRX discontinuous reception
- the network configures a plurality of paging occasions (POs) for each time period called a paging DRX cycle, and allows a specific UE to obtain a paging message by receiving only a specific paging opportunity time.
- the UE may not receive a call channel outside of the specific call opportunity time and may be in a sleep state to reduce power consumption.
- One call opportunity time corresponds to one TTI.
- the eNB and the UE use a paging indicator (PI) as a specific value indicating the transmission of the paging message.
- the eNB may notify the UE of call information transmission by defining a specific identifier (eg, Paging-Radio Network Temporary Identity. P-RNTI) for the purpose of the PI.
- P-RNTI Paging-Radio Network Temporary Identity
- the UE wakes up every DRX cycle and receives one subframe to know whether a call message is present.
- the UE may know that if there is a P-RNTI in the L1 / L2 control channel (eg, a physical downlink control channel (PDCCH)) of the received subframe, there is a call message in the PDSCH of the corresponding subframe.
- the call message has its own UE identifier (eg, IMSI)
- the UE receives the service by responding to the eNB (eg, receiving RRC connection or system information).
- the system information includes essential information that the UE needs to know in order to access the eNB. Therefore, the UE must be receiving all the system information before connecting to the eNB, and must always have the latest system information. And since the system information is information that all UEs in one cell should know, the eNB periodically transmits the system information.
- System information may be classified into a master information block (MIB), a scheduling block (SB), and a system information block (SIB).
- MIB allows the UE to know the physical configuration (eg, bandwidth, etc.) of the cell.
- SB informs transmission information of SIBs, for example, a transmission period.
- SIB is a collection of related system information. For example, a specific SIB includes only information of neighboring cells, and another SIB includes only information of an uplink channel used by the UE.
- the eNB transmits a paging message to inform the UE whether to change the system information.
- the call message includes a system information change indicator.
- the UE receives the call message according to the call cycle, and when the call message includes the system information change indicator, the UE receives the system information through the BCCH, which is a logical channel.
- the E-UTRAN since the E-UTRAN can grasp the presence of the UE in the RRC connected state on a cell basis, it can effectively control the UE. Accordingly, the network may transmit data to and receive data from the UE in an RRC connected state. In addition, in the RRC connected state, the network controls the movement of the UE. That is, the network determines which E-UTRA cell (s) or inter-RAT cell the UE should connect to. The network triggers a handover procedure based on radio conditions, load, and the like. To this end, the network may configure the UE to perform measurement reporting (which may include configuration of the measurement gap). The network may initiate the handover without receiving a measurement report from the UE.
- the network may transmit data to and receive data from the UE in an RRC connected state.
- the network controls the movement of the UE. That is, the network determines which E-UTRA cell (s) or inter-RAT cell the UE should connect to.
- the network triggers a handover procedure based on radio conditions, load
- the eNB of the cell to which the UE is currently connected (hereinafter referred to as a source eNB) sends all necessary information to the eNB of the cell (hereinafter referred to as a target cell) to which the UE is to be handed over.
- Communicate information Gather a plurality of uplink / downlink frequency blocks to allow a target eNB to select a secondary component carrier (SCC) (also called a SCell) when carrier aggregation using a larger uplink / downlink bandwidth is configured
- SCC secondary component carrier
- SCell secondary component carrier
- the source eNB may provide a list of component carriers (CCs) with the best radio quality and optionally a measurement result of the CCs.
- the target eNB may generate a message used to perform the handover, that is, a handover message including an access stratum (AS) configuration to be used in the target cell (s).
- the source eNB does not change the value / content in the handover message received from the target eNB, and delivers it to the UE as it is.
- the source eNB may initiate data forwarding for DRBs.
- the UE After receiving the handover message, the UE performs a random access procedure to access a carrier of a target cell (for example, a carrier operating on a primary carrier frequency (also called a PCC or PCell)). Try. If the handover is successfully completed, the UE sends a message used to confirm the handover.
- a carrier of a target cell for example, a carrier operating on a primary carrier frequency (also called a PCC or PCell)
- the source eNB and the UE maintain some context (eg, Cell Radio Network Temporary Identifier (C-RNTI) for some time) to allow the UE to return to the cell of the source eNB.
- C-RNTI Cell Radio Network Temporary Identifier
- the UE attempts to resume the RRC connection with the source eNB or attempts an RRC connection in another cell using the RRC connection reestablishment procedure.
- the HeNB may be configured to provide a service only to a closed subscriber group (CSG).
- CSG cell a cell of the HeNB providing a service only to the CSG is referred to as a CSG cell.
- the CSG cell may be regarded as a kind of femto cell that broadcasts a CSG indicator set to true and a specific CSG identity (CSG identity).
- CSG identity a specific CSG identity
- Each CSG cell has its own unique identification number, which is called the CSG ID.
- the UE may have a list of CSG cells (hereinafter, CSG whitelist) to which it belongs, and this CSG whitelist may be changed at the request of the UE or the command of the network.
- CSG whitelist CSG cells
- one HeNB may support one CSG cell.
- the HeNB transmits the CSG ID of the CSG cell it supports through the system information to allow only the access to the HeNB by the member UE of the corresponding CSG. HeNB does not always need to allow access only to CSG UEs. Depending on the configuration of the HeNB, it is also possible to allow connection of UEs that are not CSG members. For example, a hybrid cell may be configured that is accessible as a CSG cell by a UE that is a member of the CSG and as a normal cell by other UEs. Which UEs are allowed to connect may change depending on the setting of the operating mode of the HeNB.
- the RRC dormant UE performs cell selection / reselection to the CSG cell (s) according to an autonoumous search function.
- the movement of the UE to the CSG cell is called inbound mobility to the CSG cell.
- the search function determines when / where to search for CSG cells and does not require the help of the network regarding information about frequencies dedicated to CSG cells.
- all CSG cells on the mixed carriers broadcast physical cell identifier (PCI) values reserved by the network for use by the CSG cell as system information.
- PCI physical cell identifier
- non-CSG cells on the mixed carriers can also send this information as system information.
- the reserved PCI range is only applicable to the frequency of the PLMN in which the UE receives this information.
- the UE may consider the received PCI values for CSG cells to be valid for up to 24 hours within the entire PLMN.
- the use of the UE of the received PCI information depends on the UE implementation.
- the UE confirms the suitability of the CSG cells identified by the CSG indicator based on the CSG whitelist in the UE provided by the higher layer.
- the UE discovers a CSG cell, it can check which CSG the CSG cell supports by reading the CSG ID included in the system information.
- the UE that reads the CSG ID is considered to be a cell that can access the cell only when the UE is a member of the CSG cell, that is, the CSG ID is a CSG cell belonging to the CSG whitelist of the UE.
- the CSG whitelist configured by the UE is empty, self discovery for the CSG cell by the UE is disabled by the discovery function. In addition to automatic discovery of CSG cells, manual selection of CSG cells is supported. Cell selection / reselection for CSG cells does not require the network to provide neighbor cell information to the UE. However, in some special cases, for example, when the network wants to trigger the UE to search for CSG cells, the network may provide neighbor cell information to the UE.
- Inbound movement to a CSG cell for a UE in an RRC connected state may be performed.
- the UE in an RRC connected state performs the normal measurement procedure and the mobility procedure based on the configuration provided by the network. That is, normal measurement procedures and mobility procedures may be used to support handover to cells that broadcast CSG IDs.
- the UE in RRC connection is not required to support manual selection of CSG IDs.
- Handover to a HeNB, such as a CSG cell differs from the normal handover procedure in three aspects.
- Proximity estimation if the UE can determine that the CSG ID is close to the CSG cell or hybrid cell in the CSG whitelist of the UE using the self discovery function, the UE informs the source eNB Proximity indication can be provided.
- the neighborhood indication can be used as follows.
- the source eNB may configure the UE to perform measurement and reporting for the frequency / RAT. Specifically, the source eNB may configure the UE to report entering or leaving the proximity of the cell (s) included in its CSG cell whitelist. Further, the source eNB may request the UE to provide additional information broadcasted by the handover candidate cell (eg, cell global ID, CSG ID, CSG membership status). For reference, the source eNB may use the proximity indication procedure to configure the measurement as well as to determine whether to request additional information broadcast by the handover candidate cell. The additional information is used to verify that the UE is not authorized to access a target carrier. The additional information may be needed to identify the cell if the physical layer identifier included in the measurement report does not uniquely identify the corresponding handover candidate cell.
- additional information broadcasted by the handover candidate cell eg, cell global ID, CSG ID, CSG membership status
- the source eNB may determine whether to perform other actions related to handover to the HeNB based on the received neighbor indication. For example, the source eNB may not configure the UE to acquire system information of the HeNB unless it receives a neighbor indication.
- PSC Packet scheduling
- PCI physical cell indentifier
- Access control If the target cell is a hybrid cell, the allocated resources may be prioritized based on the membership state of the UE. Access control is performed by the first process of determining the membership status based on the CSG ID received from the target cell and the CSG whitelist of the UE, and the second second to verify the reported status of the network.
- the femto cell may interfere with the non-femto cell. have.
- the operator cannot know how the femto cell is deployed.
- the present invention provides information indicating the location of the vicinity of the neighboring cell to which the UE enters when the UE enters the vicinity of the neighboring cell.
- the UE may determine a femto / CSG cell whose CSG ID is stored in the UE as the neighbor cell.
- the location may be included in the neighbor indication or measurement report and reported to the serving cell.
- the neighbor indication may include information indicating a carrier frequency of the neighbor cell.
- the neighbor indication may include information indicating that the neighbor cell enters the vicinity.
- the measurement report may include measurement results (eg, signal strength, reference signal received power (RSRP), reference signal received quality (RSRQ), path loss, etc.) of the neighbor cell.
- the present invention also proposes an embodiment in which, when the UE leaves the vicinity of the neighbor cell, the UE reports information about the location of the neighbor cell to the serving cell.
- RSRP reference signal received power
- RSRQ reference signal received quality
- FIGS. 5 and 6 For convenience of description, embodiments of the present invention will be described by referring to a CSG cell, a femto cell, and a hybrid cell collectively as a femto cell.
- FIG. 5 is a diagram illustrating inbound mobility in which a user equipment moves from a macro cell to a femto cell according to an embodiment of the present invention.
- an eNB of a macro cell is called a source eNB
- an eNB of a femto cell is called a target HeNB.
- the UE upon receiving a request for reporting of positioning information and proximity configuration from a source eNB, the UE receives positioning information regarding the vicinity / coverage of the femtocell of the target HeNB having the CSG ID in the CSG whitelist of the UE. Can report to the network.
- the UE performing the inbound movement can measure at least one of the following four locations and report positioning information indicative of at least one of the measured locations to the network.
- P1 location of the UE when the femto cell is found by self discovery or when a near indication for the carrier frequency of the femto cell is constructed for entry into the femto cell.
- P2 location of the UE when the UE measures the femto cell or when the UE rescues the measurement report with the PCI of the femto cell
- P3 location of the UE when the UE reads the system information of the femtocell or when configuring the measurement report for the femtocell after the UE reads the system information.
- the UE may obtain the locations using a configured positioning method or its Global Positioning System (GPS) receiver.
- GPS Global Positioning System
- the UE may configure a positioning method (eg, an observed time difference of arrival (OTDOA) (S01) .
- a positioning method eg, an observed time difference of arrival (OTDOA) (S01) .
- the UE may use its GPS receiver.
- a source eNB may control the UE to configure a positioning method.
- the source eNB may request the UE to report the neighbor configuration using the neighbor indication control (S02). For example, the source eNB may send an RRC connection reconfiguration message to the UE, where the UE includes a reportProximityConfig .
- the source eNB may include a PositioningRequest in the RRC connection reconfiguration message requesting to report the neighbor configuration and transmit it to the UE (S02).
- the source eNB may send a positioning configuration message to the UE via LLP (LTE Positioning Protocol) to configure the positioning method to the UE.
- LLP LTE Positioning Protocol
- the UE determines that the CSG ID may be near the cell in its CSG whitelist based on the self discovery procedure S03, that is, if the UE detects that it is in the vicinity of the femto cell, then the UE “ P1 may be transmitted to the source eNB together with or separately from the "enter" indication message (S04).
- the "entry" near indication and / or P1 may be included in an RRC connection reconfiguration complete message and transmitted from the UE to the source eNB when the detection procedure and / or positioning procedure for the near indication ends.
- the UE in an RRC connected state may initiate transmission of the neighbor indication in the following cases.
- Neighbor indication is enabled for E-UTRA cells and the UE enters the vicinity of one or more cell (s) on the E-UTRA frequency, the CSG ID of which is in the CSG whitelist of the UE. If; or
- the CSG ID enters the vicinity of one or more cell (s) in the UE's CSG whitelist:
- the UE may set the content of the proximity indication message as follows.
- the CSG ID is in the CSG whitelist of the UE:
- the carrier frequency is set to 'eutra' having a value set to an Evolved Absolute Radio Frequency Channel Number (E-ARFCN) value of the E-UTRA cell (s) in which the neighbor indication was triggered;
- E-ARFCN Evolved Absolute Radio Frequency Channel Number
- the CSG ID is in the CSG whitelist of the UE:
- the source eNB configures the UE with an associated measurement configuration that includes the necessary measurement gaps, allowing the UE to perform measurements on the reported RAT and frequency.
- the network may also be further configured to minimize the request for handover preparation information by avoiding the request for handover preparation information of the femto cell when the UE is not in the geographic area where the cell whose CSG ID is located in the CSG whitelist of the UE is located. Nearby instructions may be used.
- the UE receiving the measurement configuration from the source eNB may send P2 to the source eNB with or separately from the measurement report including the PCI (S06).
- the measurement report may be constructed when the channel state of the neighbor cell is better than the channel state of the PCell of the serving cell by a predetermined offset or more.
- the source eNB may configure the UE to perform system information (SI) acquisition and report of a specific PCI (S07).
- SI system information
- the UE may perform SI acquisition from the target HeNB using a self gap (S08). That is, the UE may suspend reception and transmission with the source eNB within certain constraints to obtain a relevant SI from a target HeNB.
- the SI transmitted by the target HeNB may include an (E-) CGI ((E-UTRAN) cell global identifier), a tracking area identity (TAI), a CSG ID, etc., and from the target HeNB to the UE via BCCH Can be sent.
- the UE acquiring the SI of the target HeNB may send a measurement report including the (E-) CGI, TAI, CSG ID, member / nonmember indication, etc. (S09).
- the measurement report may include P3. Even when the UE does not transmit or transmits P1 to the source eNB in S04 and S06, the UE may transmit P1 to the source eNB by including P1 in the measurement report. Even if the UE does not transmit or transmits P2 to the source eNB in S06, the UE may transmit P2 to the source eNB by including P2 in the measurement report.
- the source eNB may include the (E-) CGI and CSG ID of the target cell in the HO required message and send it to the MME (S10). If the target cell is a cell access mode (cell access mode) for the hybrid cell may also be included in the HO request message.
- the MME performs UE access control to a corresponding femto cell based on the CSG ID received in the HO request message and the CSG subscription data stored for the UE (S11). If the UE access control procedure fails, the MME may end the handover procedure by responding with a HO preparation failure message. If there is a cell connected mode, the MME determines the CSG membership status of the UE for the hybrid cell and includes it in the HO request message.
- the MME may send a HO request message including the target CSG ID received in the HO request message to the target HeNB (S12, S13). If the target cell is a hybrid cell, the CSG membership status will be included in the HO request message.
- the HO request message may be delivered from the MME via the HeNB GW (S12) to the target HeNB (S13).
- the target HeNB verifies whether the CSG ID received in the HO request message matches the CSG ID broadcast to the target cell, and if the verification succeeds, allocates appropriate resources (S14).
- UE prioritization may also be applied if CSG membership indicates that the UE is a member.
- the target HeNB may send a HO request acknowledgment (Ack) to the MME (via HeNB GW if HeNB exists) (S15, S16).
- the MME receiving the HO request Ack sends a HO command message to the source eNB (S17), and the source eNB may send a HO command message, which is an RRC connection reconfiguration message including mobility control information, to the UE. There is (S18).
- the UE Upon receiving the RRC connection reconfiguration message including the HO command, the UE completes a HO procedure by transmitting a HO complete message to a target HeNB.
- the UE may transmit P1, P2, P3 and / or P4 to the target HeNB by including the HO completion message.
- the femto cell which was the target cell before the HO completion, becomes the serving cell.
- S11 in S02 and S19 in S17 may be applied to an inter-RAT moving from the LTE system to the HeNB.
- the UE can report to the network by including the positioning information in one of the following messages.
- Neighbor indication (S04) for the femto cell Only P1 of the positions P1, P2, P3, P4 of the UE may be included in this message and transmitted to the non-femto cell.
- HO complete message (S19) transmitted to the femto cell P1, P2, P3 and / or P4 of the positions P1, P2, P3, P4 of the UE may be included in this message and transmitted to the femto cell.
- the cell may receive the positioning information and information about the femto cell and the non-femto cell (for example, the Open Mobile Alliance (OMA) or CN node).
- OMA Open Mobile Alliance
- PCI CSG ID, CGI, TAI
- the non-femto cell of the source eNB may configure an almost blank subframe (ABS) such that the UE measures the non-femto cell or femto cell.
- ABS refers to a subframe in which only a specific downlink signal, for example, a cell-specific reference signal (CRS) is transmitted or a downlink signal is transmitted at a very weak transmit power. Accordingly, among the subframes in the radio frame, subframe (s) set to ABS and other subframe (s) not set to ABS have different interference levels. If an interfering cell among the interfering cells sets a certain subframe (s) to ABS, an interfered cell that is interfered by the interfering cell schedules data transmission from the ABS to the UE.
- CRS cell-specific reference signal
- the UE may indicate whether the ABS configuration is in use together with the positioning information in the neighbor indication message, the measurement report message and / or the HO completion message. .
- the invention can also be applied to outbound movements in which the UE leaves the femto cell.
- 6 is a diagram illustrating outbound mobility in which a user equipment moves from a femto cell to a macro cell according to an embodiment of the present invention.
- an eNB of a macro cell is called a source eNB
- an eNB of a femto cell is called a HeNB.
- a UE that receives a request for reporting of positioning information and a neighbor configuration through a HO command or an RRC connection reset message may be located in the vicinity / coverage of a femto cell having a CSG ID in the CSG whitelist of the UE. Positioning information about the network may be reported. The UE performing the outbound movement may acquire at least one of the following three positions P5 to P7 and may report positioning information indicating at least one of P7 in P4 and P5 of FIG. 5 to the network.
- P5 location of the UE when the UE measures a target non-femto cell, e.g., a macro cell or when a measurement event occurs that determines a HO to the non-femto cell.
- a target non-femto cell e.g., a macro cell or when a measurement event occurs that determines a HO to the non-femto cell.
- P6 location of the UE when the UE receives a HO command to the non-femto cell or when the UE configures a HO complete message to be sent to the non-femto cell.
- P7 location of the UE when it finds that the UE is leaving the vicinity of the femto cell or when the proximity indication for the carrier frequency of the femto cell is configured to leave the femto cell.
- the UE may obtain the locations using a configured positioning method or its Global Positioning System (GPS) receiver.
- GPS Global Positioning System
- the UE, the HeNB of the femto cell, and / or the eNB of the macro cell may configure positioning (S20). If no measurement configuration exists for the frequency / RAT, the HeNB may configure the UE with an associated measurement configuration including the necessary measurement gaps to allow the UE to perform measurements on the reported RAT and frequency (S21). .
- the UE receiving the measurement configuration from the HeNB may send a measurement report including the PCI to the HeNB (S22).
- the UE may include P4 and / or P5 in the measurement report and send it to the HeNB.
- the HeNB of the femto cell and the eNB of the macro cell prepare for a handover (HO) (S23).
- the normal handover procedure controlled by the network may be applied to the movement of the UE leaving the femto cell in the active mode.
- the HeNB preparing for HO may transmit a HO command message to the UE (S24).
- the HeNB may transmit a neighbor configuration report and / or positioning request to the HO command message to the UE.
- the UE receiving the HO command successfully performs the HO of the macro
- the UE transmits a HO completion message to the eNB of the macro cell (S25).
- the UE may transmit P4, P5 and / or P6 to the macro cell by including the HO completion message.
- the eNB of the macro cell may send a message containing the proximity configuration report and / or positioning request. May be transmitted to the UE (S26).
- the UE performs a neighbor instruction according to the neighbor configuration report request, performs positioning according to the positioning request, and when the detection procedure and / or the positioning procedure for the neighbor instruction ends, the neighbor instruction information and / or positioning information
- a message including a may be transmitted to the eNB of the macro cell (S27).
- the positioning information may include P4, P5, P6 and / or P7.
- the UE in the RRC connected state may initiate transmission of the neighbor indication in the following cases.
- Neighbor indication is enabled for E-UTRA cells, where the UE is on E-UTRA frequency, the CSG ID is in the vicinity of one or more cell (s) in the CSG whitelist of the UE If; or
- the CSG ID is in the vicinity of one or more cell (s) in the CSG whitelist of the UE:
- the UE may set the content of the proximity indication message as follows.
- the CSG ID is in the CSG whitelist of the UE:
- the carrier frequency is set to 'eutra' having a value set to an Evolved Absolute Radio Frequency Channel Number (E-ARFCN) value of the E-UTRA cell (s) in which the neighbor indication was triggered;
- E-ARFCN Evolved Absolute Radio Frequency Channel Number
- the CSG ID is in the CSG whitelist of the UE:
- the UE may report the positioning information to the network by including the positioning information in one of the following messages.
- HO complete message (S25) transmitted to the non-femto cell Only P4, P5 and / or P6 of the locations P4, P5, P6 and P7 of the UE may be included in this message and transmitted to the non-femto cell. .
- Proximity indication for leaving the femto cell S27: Only P4, P5, P6 and / or P7 of the UE's locations (P4, P5, P6, P7) will be included in this message and transmitted to the non-femto cell. Can be.
- the cell may receive the positioning information and information about the femto cell and the non-femto cell (for example, the Open Mobile Alliance (OMA) or CN node).
- OMA Open Mobile Alliance
- PCI CSG ID, CGI, TAI
- the non-femto cell of the source eNB may configure an almost blank subframe (ABS) such that the UE measures the non-femto cell or femto cell.
- ABS almost blank subframe
- the UE may indicate whether the ABS configuration is in use together with the positioning information in the neighbor indication message, the measurement report message and / or the HO completion message.
- FIG. 5 and the embodiment of FIG. 6 may be applied separately or together.
- FIG. 7 is a block diagram showing the components of the transmitter 10 and the receiver 20 for carrying out the present invention.
- the transmitter 10 and the receiver 20 are radio frequency (RF) units 13 and 23 capable of transmitting or receiving radio signals carrying information and / or data, signals, messages, and the like, and in a wireless communication system.
- the device is operatively connected to components such as the memory 12 and 22 storing the communication related information, the RF units 13 and 23 and the memory 12 and 22, and controls the components.
- a processor 11, 21 configured to control the memory 12, 22 and / or the RF units 13, 23, respectively, to perform at least one of the embodiments of the invention described above.
- the memories 12 and 22 may store a program for processing and controlling the processors 11 and 21, and may temporarily store input / output information.
- the memories 12 and 22 may be utilized as buffers.
- the processors 11 and 21 typically control the overall operation of the various modules in the transmitter or receiver. In particular, the processors 11 and 21 may perform various control functions for carrying out the present invention.
- the processors 11 and 21 may also be called controllers, microcontrollers, microprocessors, microcomputers, or the like.
- the processors 11 and 21 may be implemented by hardware or firmware, software, or a combination thereof.
- application specific integrated circuits ASICs
- DSPs digital signal processors
- DSPDs digital signal processing devices
- PLDs programmable logic devices
- FPGAs field programmable gate arrays
- the firmware or software when implementing the present invention using firmware or software, may be configured to include a module, a procedure, or a function for performing the functions or operations of the present invention, and configured to perform the present invention.
- the firmware or software may be provided in the processors 11 and 21 or stored in the memory 12 and 22 to be driven by the processors 11 and 21.
- the processor 11 of the transmission apparatus 10 is predetermined from the processor 11 or a scheduler connected to the processor 11 and has a predetermined encoding and modulation on a signal and / or data to be transmitted to the outside. After performing the transmission to the RF unit 13.
- the processor 11 converts the data sequence to be transmitted into K layers through demultiplexing, channel encoding, scrambling, and modulation.
- the coded data string is also referred to as a codeword and is equivalent to a transport block, which is a data block provided by the MAC layer.
- One transport block (TB) is encoded into one codeword, and each codeword is transmitted to a receiving device in the form of one or more layers.
- the RF unit 13 may include an oscillator for frequency upconversion.
- the RF unit 13 may include N t transmit antennas, where N t is a positive integer greater than or equal to one.
- the signal processing procedure of the receiving device 20 is configured in the reverse of the signal processing procedure of the transmitting device 10.
- the RF unit 23 of the receiving device 20 receives a radio signal transmitted by the transmitting device 10.
- the RF unit 23 may include N r receive antennas, and the RF unit 23 frequency down-converts each of the signals received through the receive antennas to restore the baseband signal. .
- the RF unit 23 may include an oscillator for frequency downconversion.
- the processor 21 may decode and demodulate a radio signal received through a reception antenna to restore data originally transmitted by the transmission apparatus 10.
- the RF units 13, 23 have one or more antennas.
- the antenna transmits a signal processed by the RF units 13 and 23 to the outside or receives a radio signal from the outside according to an embodiment of the present invention under the control of the processors 11 and 21. , 23).
- Antennas are also called antenna ports.
- Each antenna may correspond to one physical antenna or may be configured by a combination of more than one physical antenna elements.
- the signal transmitted from each antenna can no longer be decomposed by the receiver 20.
- a reference signal (RS) transmitted in correspondence with the corresponding antenna defines the antenna as viewed from the perspective of the receiver 20, and whether the channel is a single radio channel from one physical antenna or includes the antenna.
- RS reference signal
- the receiver 20 enables channel estimation for the antenna. That is, the antenna is defined such that a channel carrying a symbol on the antenna can be derived from the channel through which another symbol on the same antenna is delivered.
- the antenna In the case of an RF unit supporting a multi-input multi-output (MIMO) function for transmitting and receiving data using a plurality of antennas, two or more antennas may be connected.
- MIMO multi-input multi-output
- the UE operates as the transmitter 10 in the uplink and operates as the receiver 20 in the downlink.
- the eNB and the HeNB operate as the receiving device 20 in the uplink and operate as the transmitting device 10 in the downlink.
- the processor of the UE (hereinafter referred to as UE processor) and / or the processor of the source eNB (hereinafter referred to as source eNB processor) may configure the UE to perform proximity indication and / or positioning.
- the UE processor in FIG. 5 controls the RF unit (hereinafter referred to as UE RF unit) of the UE so that the source eNB and the target HeNB transmit information or a message transmitted to the UE, and the UE controls the source eNB and / or the target HeNB. May construct the information or message, described in Figure 5.
- the UE processor may send the configured information or message to the eNB (ie, the source eNB or the target HeNB).
- the UE processor may perform proximity indication and / or positioning according to configuration of the UE itself or control of the HeNB
- the UE may include a GPS receiver, and the UE processor may include the GPS receiver. Positioning may be performed using the UE processor, for example, determining one of positions of the UE, P1, P2, P3, and P4 according to a positioning request from a source eNB.
- the UE processor may control the UE RF unit to transmit positioning information indicating at least one of the P1, P2, P3, and P4 to the source eNB.
- the UE processor may include a proximity indication message S04, a measurement report message S06, S09, and / or include positioning information indicating at least one of the P1, P2, P3, and P4; Or construct a HO complete message S19 and control the UE RF unit to send the configured message (s) to the source eNB.
- a processor (hereinafter, referred to as a macro eNB processor) of an eNB of a UE processor and / or a macro cell may configure the UE to perform proximity indication and / or positioning.
- the processor of the UE (hereinafter referred to as a UE processor) controls the UE RF unit to receive information or a message transmitted to the UE by the eNB (hereinafter referred to as HeNB) of the macro eNB or femtocell in FIG. 6, and the UE receives the macro eNB. And / or construct information or a message, described in FIG. 6, to send to the HeNB.
- the UE processor configures the UE RF unit to transmit the configured information or message to a corresponding eNB (ie, the source eNB or the target HeNB).
- the UE processor may store neighborhood configuration information and / or positioning information in a memory of the UE.
- the UE processor may perform proximity indication and / or positioning according to configuration of the UE itself or control of a macro eNB or HeNB. For example, when the UE RF unit receives a positioning request from a macro eNB or a HeNB, the UE processor may determine one of the positions P5, P6 and P7 of the UE according to the positioning request.
- the UE processor provides positioning information indicating P4 measured while entering the femto cell or the vicinity of the femto cell and at least one of P5, P6, and P7 measured while leaving the femto cell or the femto cell.
- the UE RF unit may be controlled to transmit the positioning request to the eNB that transmitted the positioning request.
- the UE processor constructs a HO complete message S25 and / or a neighbor indication message S27 to include positioning information indicative of at least one of P4, P5, P6 and P7, and configures the configured message (s) to the above.
- the UE RF unit may be controlled to transmit to the eNB requesting positioning.
- embodiments of the present invention have been described using a HO procedure, but embodiments of the present invention may be applied even when the UE does not HO from the non-femto cell to the femto cell or HO from the femto cell to the non-femto cell. . That is, embodiments of the present invention may be applied when the UE detects the vicinity of the femto cell.
- embodiments of the present invention may also be used for the Minimization of Drive Test (MDT).
- MDT refers to a technology in which operators measure the quality of a cell using automobiles to optimize cell coverage.
- embodiments of the present invention allow the UE to measure and report to the network a location near a cell that is not deployed by the operator, thereby creating a cell coverage map and time to network optimization. And cost can be minimized.
- Embodiments of the present invention may be used in a base station or user equipment or other equipment in a wireless communication system.
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Abstract
Description
Claims (9)
- 무선 통신 시스템에서 사용자기기가 네트워크에 위치 정보를 전송함에 있어서,상기 사용자기기가 머무르고 있는 셀(이하, 서빙 셀)과는 다른 셀이 근접함을 탐지하는 단계; 및상기 사용자기기의 위치를 획득하는 단계;상기 획득한 위치를 나타내는 위치 정보를 상기 네트워크에 전송하는 단계를 포함하는,위치 정보 전송 방법.
- 제1항에 있어서,상기 서빙 셀은 네트워크 사업자에 의해 배치된 셀이고 상기 다른 셀은 네트워크 사업자에 의해 배치되지 않은 셀인,위치 정보 전송 방법.
- 제2항에 있어서,상기 다른 셀은 폐쇄 가입자 그룹(closed subscriber group, CSG) 셀인,위치 정보 전송 방법.
- 제2항에 있어서,상기 위치는 상기 다른 셀의 부근으로 진입하는 동안 측정되거나 상기 다른 셀의 부근에서 이탈하는 동안 측정되는,위치 정보 전송 방법.
- 제4항에 있어서,상기 위치 정보는 상기 사용자기기가 상기 다른 셀의 부근에 진입 혹은 이탈함을 나타내기 위해 사용되는 부근지시 메시지에 포함되어 상기 네트워크로 전송되는,위치 정보 전송 방법.
- 제4항에 있어서,상기 네트워크로부터 포지셔닝 요청을 수신하고,상기 포지셔닝 요청에 대한 응답으로 상기 위치 정보를 상기 서빙 셀의 기지국을 통해 상기 네트워크로 전송하는,위치 정보 전송 방법.
- 제2항에 있어서,상기 위치 정보는 상기 서빙 셀의 기지국을 통해 상기 사용자기기가 상기 다른 셀의 부근에 진입 혹은 이탈함을 나타내기 위해 사용되는 부근지시 메시지에 포함되어 상기 네트워크로 전송되는,위치 정보 전송 방법.
- 제2항에 있어서,상기 위치 정보는 상기 사용자기기가 상기 다른 셀을 탐지한 때의 상기 사용자기기의 위치, 상기 사용자기기가 상기 네트워크로 측정보고를 하는 때의 상기 사용자기기의 위치 및 상기 사용자기기가 상기 네트워크로부터 핸드오버 명령을 받았을 때의 상기 사용자기기의 위치 중 적어도 하나를 포함하는,신호 전송 방법.
- 무선 통신 시스템에서 사용자기기가 네트워크에 위치 정보를 전송함에 있어서,무선 신호를 전송/수신하도록 구성된 무선 주파수(radio frequency, RF) 유닛; 및상기 RF 유닛을 제어하도록 구성된 프로세서를 포함하되, 상기 프로세서는 상기 사용자기기가 머무르고 있는 셀(이하, 서빙 셀)과는 다른 셀이 근접함을 탐지하고, 상기 사용자기기의 위치를 획득하도록 구성되고, 상기 획득한 위치를 나타내는 위치 정보를 상기 네트워크에 전송하도록 상기 RF 유닛을 제어하는,사용자기기.
Priority Applications (4)
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KR1020137023333A KR20140050579A (ko) | 2011-04-03 | 2012-04-03 | 위치 정보 전송 방법 및 사용자기기 |
CN2012800163845A CN103477671A (zh) | 2011-04-03 | 2012-04-03 | 用于发送位置信息的方法和用户设备 |
DE112012001163T DE112012001163T5 (de) | 2011-04-03 | 2012-04-03 | Verfahren zum Senden von Positionsinformation und Nutzergerät |
US14/005,761 US20140011519A1 (en) | 2011-04-03 | 2012-04-03 | Method for transmitting location information and user equipment |
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US201161471177P | 2011-04-03 | 2011-04-03 | |
US61/471,177 | 2011-04-03 |
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US (1) | US20140011519A1 (ko) |
KR (1) | KR20140050579A (ko) |
CN (1) | CN103477671A (ko) |
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WO (1) | WO2012138094A2 (ko) |
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Also Published As
Publication number | Publication date |
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DE112012001163T5 (de) | 2013-12-24 |
WO2012138094A3 (ko) | 2013-01-10 |
US20140011519A1 (en) | 2014-01-09 |
KR20140050579A (ko) | 2014-04-29 |
CN103477671A (zh) | 2013-12-25 |
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