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WO2016018018A1 - Procédé pour effectuer une découverte prose dans un système de communication sans fil et dispositif associé - Google Patents

Procédé pour effectuer une découverte prose dans un système de communication sans fil et dispositif associé Download PDF

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Publication number
WO2016018018A1
WO2016018018A1 PCT/KR2015/007796 KR2015007796W WO2016018018A1 WO 2016018018 A1 WO2016018018 A1 WO 2016018018A1 KR 2015007796 W KR2015007796 W KR 2015007796W WO 2016018018 A1 WO2016018018 A1 WO 2016018018A1
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Prior art keywords
prose
discovery
enhanced
proximity
information
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English (en)
Korean (ko)
Inventor
김래영
류진숙
김현숙
김재현
김태훈
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LG Electronics Inc
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LG Electronics Inc
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • 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

Definitions

  • the following description relates to a wireless communication system, and more particularly, to a method and apparatus for performing process discovery.
  • Wireless communication systems are widely deployed to provide various kinds of communication services such as voice and data.
  • a wireless communication system is a multiple access system capable of supporting communication with multiple users by sharing available system resources (bandwidth, transmission power, etc.).
  • multiple access systems include code division multiple access (CDMA) systems, frequency division multiple access (FDMA) systems, time division multiple access (TDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, and single carrier frequency (SC-FDMA).
  • 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
  • MCD division multiple access
  • MCDMA multi-carrier frequency division multiple access
  • MC-FDMA multi-carrier frequency division multiple access
  • a first technical aspect of the present invention is a method of performing ProSe discovery by a ProSe function in a wireless communication system, comprising: receiving a proximity request including a window and a range from a discoverer UE; Determining, by the discoverer UE, that a discovery enters a proximity relationship with the UE until the window expires, and when the ProSe function determines to perform an enhanced ProSe discovery operation, the ProSe function Discovery is a method that does not cancel location reporting even if the window expires.
  • a ProSe function device for performing ProSe discovery in a wireless communication system, comprising: a transceiver module; And a processor, the processor receiving a proximity request from a discoverer UE, the proximity request comprising a window and a range, wherein the discoverer UE is in proximity with the discovery UE until the window expires.
  • the ProSe function determines to perform an enhanced ProSe discovery operation, the ProSe function is a ProSe function device that does not cancel location reporting even when the window expires.
  • the first to second technical aspects of the present invention may include one or more of the following.
  • the ProSe function is determined from the window ( ⁇ ), range ( ⁇ ) and time information ( ⁇ ) related to ProSe discovery ( ⁇ ). Based on the determination, whether to perform the enhanced ProSe discovery operation may be determined.
  • the determined distance ⁇ may be determined by ⁇ / ⁇ * ⁇ .
  • the distance between the discovery UE and the discovery UE is within the sum of the determined distance ⁇ and range ⁇ , it may be determined that the enhanced ProSe discovery operation is performed.
  • the ProSe function is determined from the window ( ⁇ ), range ( ⁇ ) and distance information (m) related to the enhanced ProSe discovery (t). It may be decided to perform the enhanced ProSe discovery operation.
  • the determined time t may be determined by ⁇ m / ⁇ * ⁇ .
  • an improved ProSe experience can be provided to a user who wants to find another UE / user.
  • FIG. 1 is a diagram illustrating a schematic structure of an EPS (Evolved Packet System) including an Evolved Packet Core (EPC).
  • EPS Evolved Packet System
  • EPC Evolved Packet Core
  • FIG. 2 is an exemplary view showing the architecture of a general E-UTRAN and EPC.
  • 3 is an exemplary view showing the structure of a radio interface protocol in a control plane.
  • FIG. 4 is an exemplary view showing the structure of a radio interface protocol in a user plane.
  • 5 is a flowchart illustrating a random access procedure.
  • RRC radio resource control
  • FIG. 11 is a view for explaining ProSe (Proximity Service).
  • FIG. 12 illustrates a procedure related to UE location reporting.
  • 15 is a diagram illustrating a configuration of a node device according to an example of 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.
  • Embodiments of the present invention may be supported by standard documents disclosed in relation to at least one of the Institute of Electrical and Electronics Engineers (IEEE) 802 series system, 3GPP system, 3GPP LTE and 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.
  • IEEE Institute of Electrical and Electronics Engineers
  • UMTS Universal Mobile Telecommunications System
  • GSM Global System for Mobile Communication
  • Evolved Packet System A network system composed of an Evolved Packet Core (EPC), which is a packet switched (PS) core network based on Internet Protocol (IP), and an access network such as LTE / UTRAN.
  • EPC Evolved Packet Core
  • PS packet switched
  • IP Internet Protocol
  • UMTS is an evolutionary network.
  • NodeB base station of GERAN / UTRAN. It is installed outdoors and its coverage is macro cell size.
  • eNodeB base station of E-UTRAN. It is installed outdoors and its coverage is macro cell size.
  • UE User Equipment
  • the UE may be referred to in terms of terminal, mobile equipment (ME), mobile station (MS), and the like.
  • the UE may be a portable device such as a laptop, a mobile phone, a personal digital assistant (PDA), a smart phone, a multimedia device, or the like, or may be a non-portable device such as a personal computer (PC) or a vehicle-mounted device.
  • the term UE or UE may refer to an MTC device.
  • HNB Home NodeB
  • HeNB Home eNodeB: A base station of an EPS network, which is installed indoors and its coverage is micro cell size.
  • Mobility Management Entity A network node of an EPS network that performs mobility management (MM) and session management (SM) functions.
  • Packet Data Network-Gateway (PDN-GW) / PGW A network node of an EPS network that performs UE IP address assignment, packet screening and filtering, charging data collection, and the like.
  • SGW Serving Gateway
  • Non-Access Stratum Upper stratum of the control plane between the UE and the MME.
  • Packet Data Network A network in which a server supporting a specific service (eg, a Multimedia Messaging Service (MMS) server, a Wireless Application Protocol (WAP) server, etc.) is located.
  • a server supporting a specific service eg, a Multimedia Messaging Service (MMS) server, a Wireless Application Protocol (WAP) server, etc.
  • MMS Multimedia Messaging Service
  • WAP Wireless Application Protocol
  • PDN connection A logical connection between the UE and the PDN, represented by one IP address (one IPv4 address and / or one IPv6 prefix).
  • RAN Radio Access Network: a unit including a NodeB, an eNodeB and a Radio Network Controller (RNC) controlling them in a 3GPP network. It exists between UEs and provides a connection to the core network.
  • RNC Radio Network Controller
  • HLR Home Location Register
  • HSS Home Subscriber Server
  • PLMN Public Land Mobile Network
  • Proximity Service (or ProSe Service or Proximity based Service): A service that enables discovery and direct communication between physically close devices or communication through a base station or through a third party device. In this case, user plane data is exchanged through a direct data path without passing through a 3GPP core network (eg, EPC).
  • EPC 3GPP core network
  • ProSe communication Means communication through a ProSe communication path between two or more ProSe capable terminals. Unless specifically stated otherwise, ProSe communication may mean one of ProSe E-UTRA communication, ProSe-assisted WLAN direct communication between two terminals, ProSe group communication, or ProSe broadcast communication.
  • ProSe-assisted WLAN direct communication ProSe communication using a direct communication path
  • ProSe communication path As a communication path supporting ProSe communication, a ProSe E-UTRA communication path may be established between ProSe-enabled UEs or through a local eNB using E-UTRA. ProSe-assisted WLAN direct communication path can be established directly between ProSe-enabled UEs using WLAN.
  • EPC path (or infrastructure data path): user plane communication path through EPC
  • ProSe Discovery A process of identifying / verifying a nearby ProSe-enabled terminal using E-UTRA
  • ProSe Group Communication One-to-many ProSe communication using a common communication path between two or more ProSe-enabled terminals in close proximity.
  • ProSe UE-to-Network Relay ProSe-enabled public safety terminal acting as a communication relay between ProSe-enabled network using E-UTRA and ProSe-enabled public safety terminal
  • ProSe UE-to-UE Relay A ProSe-enabled public safety terminal operating as a ProSe communication relay between two or more ProSe-enabled public safety terminals.
  • ProSe-enabled Network A network that supports ProSe Discovery, ProSe Communication, and / or ProSe-assisted WLAN direct communication.
  • the ProSe-enabled Network may be referred to simply as a network.
  • ProSe-enabled UE a terminal supporting ProSe discovery, ProSe communication and / or ProSe-assisted WLAN direct communication.
  • the ProSe-enabled UE and the ProSe-enabled Public Safety UE may be called terminals.
  • Proximity Satisfying proximity criteria defined in discovery and communication, respectively.
  • SLP SULP Location Platform
  • SLP An entity that manages Location Service Management and Position Determination.
  • SLP includes a SPL (SUPL Location Center) function and a SPC (SUPL Positioning Center) function.
  • SPL SUPL Location Center
  • SPC SUPL Positioning Center
  • OMA Open Mobile Alliance
  • ISR Interle mode Signaling Reduction
  • EPC Evolved Packet Core
  • FIG. 1 is a diagram illustrating a schematic structure of an EPS (Evolved Packet System) including an Evolved Packet Core (EPC).
  • EPS Evolved Packet System
  • EPC Evolved Packet Core
  • SAE System Architecture Evolution
  • SAE is a research project to determine network structure supporting mobility between various kinds of networks.
  • SAE aims to provide an optimized packet-based system, for example, supporting various radio access technologies on an IP basis and providing enhanced data transfer capabilities.
  • the EPC is a core network of an IP mobile communication system for a 3GPP LTE system and may support packet-based real-time and non-real-time services.
  • a conventional mobile communication system i.e., a second generation or third generation mobile communication system
  • the core network is divided into two distinct sub-domains of circuit-switched (CS) for voice and packet-switched (PS) for data.
  • CS circuit-switched
  • PS packet-switched
  • the function has been implemented.
  • the sub-domains of CS and PS have been unified into one IP domain.
  • EPC IP Multimedia Subsystem
  • the EPC may include various components, and in FIG. 1, some of them correspond to a serving gateway (SGW), a packet data network gateway (PDN GW), a mobility management entity (MME), and a serving general packet (SGRS) Radio Service (Supporting Node) and Enhanced Packet Data Gateway (ePDG) are shown.
  • SGW serving gateway
  • PDN GW packet data network gateway
  • MME mobility management entity
  • SGRS serving general packet
  • Radio Service Upporting Node
  • ePDG Enhanced Packet Data Gateway
  • the SGW acts as a boundary point between the radio access network (RAN) and the core network, and is an element that functions to maintain a data path between the eNodeB and the PDN GW.
  • the SGW serves as a local mobility anchor point. That is, packets may be routed through the SGW for mobility in the E-UTRAN (Universal Mobile Telecommunications System (Evolved-UMTS) Terrestrial Radio Access Network defined in 3GPP Release-8 or later).
  • E-UTRAN Universal Mobile Telecommunications System (Evolved-UMTS) Terrestrial Radio Access Network defined in 3GPP Release-8 or later.
  • SGW also provides mobility with other 3GPP networks (RANs defined before 3GPP Release-8, such as UTRAN or GERAN (Global System for Mobile Communication (GSM) / Enhanced Data rates for Global Evolution (EDGE) Radio Access Network). It can also function as an anchor point.
  • RANs defined before 3GPP Release-8 such as UTRAN or GERAN (Global System for Mobile Communication (GSM) / Enhanced Data rates for Global Evolution (EDGE) Radio Access Network). It can also function as an anchor point.
  • GSM Global System for Mobile Communication
  • EDGE Enhanced Data rates for Global Evolution
  • the PDN GW corresponds to the termination point of the data interface towards the packet data network.
  • the PDN GW may support policy enforcement features, packet filtering, charging support, and the like.
  • mobility management between 3GPP networks and non-3GPP networks for example, untrusted networks such as Interworking Wireless Local Area Networks (I-WLANs), code-division multiple access (CDMA) networks, or trusted networks such as WiMax) Can serve as an anchor point for.
  • untrusted networks such as Interworking Wireless Local Area Networks (I-WLANs), code-division multiple access (CDMA) networks, or trusted networks such as WiMax
  • I-WLANs Interworking Wireless Local Area Networks
  • CDMA code-division multiple access
  • WiMax trusted networks
  • FIG. 1 shows that the SGW and the PDN GW are configured as separate gateways, two gateways may be implemented according to a single gateway configuration option.
  • the MME is an element that performs signaling and control functions to support access to the network connection of the UE, allocation of network resources, tracking, paging, roaming and handover, and the like.
  • the MME controls control plane functions related to subscriber and session management.
  • the MME manages a number of eNodeBs and performs signaling for the selection of a conventional gateway for handover to other 2G / 3G networks.
  • the MME also performs functions such as security procedures, terminal-to-network session handling, and idle terminal location management.
  • SGSN handles all packet data, such as user's mobility management and authentication to other 3GPP networks (eg GPRS networks).
  • 3GPP networks eg GPRS networks.
  • the ePDG acts as a secure node for untrusted non-3GPP networks (eg, I-WLAN, WiFi hotspots, etc.).
  • untrusted non-3GPP networks eg, I-WLAN, WiFi hotspots, etc.
  • a terminal having IP capability is an IP service network provided by an operator (ie, an operator) via various elements in the EPC, based on 3GPP access as well as non-3GPP access. (Eg, IMS).
  • FIG. 1 illustrates various reference points (eg, S1-U, S1-MME, etc.).
  • a conceptual link defining two functions existing in different functional entities of E-UTRAN and EPC is defined as a reference point.
  • Table 1 below summarizes the reference points shown in FIG. 1.
  • S2a and S2b correspond to non-3GPP interfaces.
  • S2a is a reference point that provides the user plane with associated control and mobility support between trusted non-3GPP access and PDN GW.
  • S2b is a reference point that provides the user plane with relevant control and mobility support between the ePDG and PDN GW.
  • FIG. 2 is an exemplary view showing the architecture of a general E-UTRAN and EPC.
  • an eNodeB can route to a gateway, schedule and send paging messages, schedule and send broadcaster channels (BCHs), and resources in uplink and downlink while an RRC (Radio Resource Control) connection is active.
  • BCHs broadcaster channels
  • RRC Radio Resource Control
  • paging can occur, LTE_IDLE state management, user plane can perform encryption, SAE bearer control, NAS signaling encryption and integrity protection.
  • FIG. 3 is an exemplary diagram illustrating a structure of a radio interface protocol in a control plane between a terminal and a base station
  • FIG. 4 is an exemplary diagram illustrating a structure of a radio interface protocol in a user plane between a terminal and a base station. .
  • the air interface protocol is based on the 3GPP radio access network standard.
  • the air interface protocol is composed of a physical layer, a data link layer, and a network layer horizontally, and a user plane and control for data information transmission vertically. It is divided into a control plane for signal transmission.
  • the protocol layers are based on the lower three layers of the Open System Interconnection (OSI) reference model, which is widely known in communication systems, and includes L1 (first layer), L2 (second layer), and L3 (third layer). ) Can be separated.
  • OSI Open System Interconnection
  • the physical layer which is the first layer, provides an information transfer service using a physical channel.
  • the physical layer is connected to a medium access control layer on the upper side through a transport channel, and data between the medium access control layer and the physical layer is transmitted through the transport channel.
  • data is transferred between different physical layers, that is, between physical layers of a transmitting side and a receiving side through a physical channel.
  • the physical channel is composed of several subframes on the time axis and several sub-carriers on the frequency axis.
  • one subframe includes a plurality of symbols and a plurality of subcarriers on the time axis.
  • One subframe consists of a plurality of resource blocks, and one resource block consists of a plurality of symbols and a plurality of subcarriers.
  • the transmission time interval (TTI) which is a unit time for transmitting data, is 1 ms corresponding to one subframe.
  • the physical channels existing in the physical layer of the transmitting side and the receiving side are physical downlink shared channel (PDSCH), physical uplink shared channel (PUSCH) and physical downlink control channel (PDCCH), which are control channels, It may be divided into a Physical Control Format Indicator Channel (PCFICH), a Physical Hybrid-ARQ Indicator Channel (PHICH), and a Physical Uplink Control Channel (PUCCH).
  • PCFICH Physical Control Format Indicator Channel
  • PHICH Physical Hybrid-ARQ Indicator Channel
  • PUCCH Physical Uplink Control Channel
  • the medium access control (MAC) layer of the second layer serves to map various logical channels to various transport channels, and also logical channel multiplexing to map several logical channels to one transport channel. (Multiplexing).
  • the MAC layer is connected to the upper layer RLC layer by a logical channel, and the logical channel includes a control channel for transmitting information of a control plane according to the type of information to be transmitted. It is divided into a traffic channel that transmits user plane information.
  • the Radio Link Control (RLC) layer of the second layer adjusts the data size so that the lower layer is suitable for transmitting data to the radio section by segmenting and concatenating data received from the upper layer. It plays a role.
  • RLC Radio Link Control
  • the Packet Data Convergence Protocol (PDCP) layer of the second layer is an IP containing 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. Performs Header Compression which reduces the packet header size.
  • the PDCP layer also performs a security function, which is composed of encryption (Ciphering) to prevent third-party data interception and integrity protection (Integrity protection) to prevent third-party data manipulation.
  • the radio resource control layer (hereinafter RRC) layer located at the top of the third layer is defined only in the control plane, and the configuration and resetting of radio bearers (abbreviated as RBs) are performed. It is responsible for the control of logical channels, transport channels and physical channels in relation to configuration and release.
  • RB means a service provided by the second layer for data transmission between the terminal and the E-UTRAN.
  • RRC connection When there is an RRC connection (RRC connection) between the RRC of the terminal and the RRC layer of the wireless network, the terminal is in an RRC connected state (Connected Mode), otherwise it is in an RRC idle mode (Idle Mode).
  • RRC connection RRC connection
  • the RRC state refers to whether or not the RRC of the UE is in a logical connection with the RRC of the E-UTRAN. If the RRC state is connected, the RRC_CONNECTED state is called, and the RRC_IDLE state is not connected. Since the UE in the RRC_CONNECTED state has an RRC connection, the E-UTRAN can grasp the existence of the UE in units of cells, and thus can effectively control the UE. On the other hand, the UE in the RRC_IDLE state cannot identify the existence of the UE by the E-UTRAN, and the core network manages the unit in a larger tracking area (TA) unit than the cell.
  • TA tracking area
  • each TA is identified by a tracking area identity (TAI).
  • TAI tracking area identity
  • the terminal may configure a TAI through a tracking area code (TAC), which is information broadcast in a cell.
  • TAC tracking area code
  • the terminal When the user first turns on the power of the terminal, the terminal first searches for an appropriate cell, then establishes an RRC connection in the cell, and registers the terminal's information in the core network. Thereafter, the terminal stays in the RRC_IDLE state. The terminal staying in the RRC_IDLE state (re) selects a cell as needed and looks at system information or paging information. This is called camping on the cell.
  • the UE staying in the RRC_IDLE state makes an RRC connection with the RRC of the E-UTRAN through an RRC connection procedure and transitions to the RRC_CONNECTED state.
  • RRC_CONNECTED state There are several cases in which a UE in RRC_IDLE state needs to establish an RRC connection. For example, a user's call attempt, a data transmission attempt, etc. are required or a paging message is received from E-UTRAN. Reply message transmission, and the like.
  • a non-access stratum (NAS) layer located above the RRC layer performs functions such as session management and mobility management.
  • NAS non-access stratum
  • ESM evolved Session Management
  • the NAS layer performs functions such as default bearer management and dedicated bearer management, and is responsible for controlling the terminal to use the PS service from the network.
  • the default bearer resource is characterized in that it is allocated from the network when it is connected to the network when it first accesses a specific Packet Data Network (PDN).
  • PDN Packet Data Network
  • the network allocates an IP address usable by the terminal so that the terminal can use the data service, and also allocates QoS of the default bearer.
  • LTE supports two types of bearer having a guaranteed bit rate (GBR) QoS characteristic that guarantees a specific bandwidth for data transmission and reception, and a non-GBR bearer having a best effort QoS characteristic without guaranteeing bandwidth.
  • GBR guaranteed bit rate
  • Non-GBR bearer is assigned.
  • the bearer allocated to the terminal in the network is called an evolved packet service (EPS) bearer, and when the EPS bearer is allocated, the network allocates one ID. This is called EPS Bearer ID.
  • EPS bearer ID One EPS bearer has a QoS characteristic of a maximum bit rate (MBR) or / and a guaranteed bit rate (GBR).
  • 5 is a flowchart illustrating a random access procedure in 3GPP LTE.
  • the random access procedure is used for the UE to get UL synchronization with the base station or to be allocated UL radio resources.
  • the UE receives a root index and a physical random access channel (PRACH) configuration index from the eNodeB.
  • PRACH physical random access channel
  • Each cell has 64 candidate random access preambles defined by a Zadoff-Chu (ZC) sequence, and the root index is a logical index for the UE to generate 64 candidate random access preambles.
  • ZC Zadoff-Chu
  • the PRACH configuration index indicates a specific subframe and a preamble format capable of transmitting the random access preamble.
  • the UE sends the randomly selected random access preamble to the eNodeB.
  • the UE selects one of the 64 candidate random access preambles.
  • the corresponding subframe is selected by the PRACH configuration index.
  • the UE transmits the selected random access preamble in the selected subframe.
  • the eNodeB Upon receiving the random access preamble, the eNodeB sends a random access response (RAR) to the UE.
  • RAR random access response
  • the random access response is detected in two steps. First, the UE detects a PDCCH masked with random access-RNTI (RA-RNTI). The UE receives a random access response in a medium access control (MAC) protocol data unit (PDU) on the PDSCH indicated by the detected PDCCH.
  • MAC medium access control
  • RRC 6 shows a connection process in a radio resource control (RRC) layer.
  • RRC radio resource control
  • the RRC state is shown depending on whether the RRC is connected.
  • the RRC state refers to whether or not an entity of the RRC layer of the UE is in a logical connection with an entity of the RRC layer of the eNodeB.
  • the RRC state is referred to as an RRC connected state.
  • the non-state is called the RRC idle state.
  • the E-UTRAN may determine the existence of the corresponding UE in units of cells, and thus may effectively control the UE.
  • the UE in the idle state can not be identified by the eNodeB, the core network is managed by the tracking area (Tracking Area) unit that is larger than the cell unit.
  • the tracking area is a collection unit of cells. That is, the idle state (UE) is determined only in the presence of the UE in a large area, and in order to receive a normal mobile communication service such as voice or data, the UE must transition to the connected state (connected state).
  • the UE When a user first powers up a UE, the UE first searches for an appropriate cell and then stays idle in that cell. When the UE staying in the idle state needs to establish an RRC connection, the UE establishes an RRC connection with the RRC layer of the eNodeB through an RRC connection procedure and transitions to an RRC connected state. .
  • the UE in the idle state needs to establish an RRC connection. For example, a user's call attempt or an uplink data transmission is necessary, or a paging message is received from EUTRAN. In this case, the response message may be transmitted.
  • the RRC connection process is largely a process in which a UE sends an RRC connection request message to an eNodeB, an eNodeB sends an RRC connection setup message to the UE, and a UE completes RRC connection setup to the eNodeB. (RRC connection setup complete) message is sent. This process will be described in more detail with reference to FIG. 6 as follows.
  • the UE When the UE in idle state attempts to establish an RRC connection due to a call attempt, a data transmission attempt, or a response to an eNodeB's paging, the UE first sends an RRC connection request message. Send to eNodeB.
  • the eNB When the RRC connection request message is received from the UE, the eNB accepts the RRC connection request of the UE when the radio resources are sufficient, and transmits an RRC connection setup message, which is a response message, to the UE. .
  • the UE When the UE receives the RRC connection setup message, it transmits an RRC connection setup complete message to the eNodeB. When the UE successfully transmits an RRC connection establishment message, the UE establishes an RRC connection with the eNodeB and transitions to the RRC connected mode.
  • the processor service refers to a service capable of discovery and direct communication between devices in close physical proximity, communication through a base station, or communication through a third device.
  • FIG. 7 illustrates a default data path through which two UEs communicate in EPS. This basic route goes through the operator's base station (eNodeB) and the core network (ie, EPC). In the present invention, such a path will be referred to as an infrastructure data path (or EPC path). In addition, communication through such an infrastructure data path will be referred to as infrastructure communication.
  • eNodeB operator's base station
  • EPC core network
  • FIG. 8 shows a direct mode data path between two UEs based on a process. This direct mode communication path does not go through an eNodeB and a core network (ie, EPC) operated by an operator.
  • FIG. 8 (a) illustrates a case where UE-1 and UE-2 camp on different eNodeBs while transmitting and receiving data through a direct mode communication path.
  • FIG. 8 (b) illustrates camping on the same eNodeB.
  • FIG. 2 illustrates a case in which two UEs that are on exchange data via a direct mode communication path.
  • FIG. 9 shows a locally-routed data path through an eNodeB between two UEs based on a process.
  • the communication path through the eNodeB does not go through the core network (ie, EPC) operated by the operator.
  • EPC core network
  • the EPC may perform an EPC-level ProSe discovery procedure for determining whether proximity between two UEs and informing the UE of this.
  • ProSe Function is to determine whether two UEs are in close proximity and to inform the UE.
  • the ProSe function retrievals and stores process associated subscriber data and / or processor associated subscriber data from the HSS, and performs EPC level process discovery and EPC secondary WLAN direct discovery, authentication and configuration for communication. Can be. It can also operate as a location service client to enable EPC level discovery and provide the UE with information to assist in WLAN direct discovery and communication. Handles EPC ProSe User IDs and Application Layer User IDs, and exchanges signals with 3rd party application servers for application registration identifier mapping. It exchanges signals with ProSe functions of other PLMNs for transmission of proximity requests, proximity alerts, and location reporting.
  • 11 illustrates a procedure related to a proximity request.
  • UE A may transmit a proximity request message to ProSe Function A.
  • the proximity request may include one or more of EPUID_A, Application ID, ALUID_A, ALUID_B, window, Range, A's location, and [WLAN indication].
  • the Application ID parameter may identify a 3rd party App Server platform.
  • ALUID_A and ALUID_B are user IDs for users A and B of the application layer.
  • the window parameter indicates the time interval for which the request is valid. Range is the range for this application, selected from the set of allowed range classes.
  • the window information may be a value between 1 and 1440 minutes.
  • the range information may indicate one of 50 m, 100 m, 200 m, 500 m, and 1000 m (see TS 24.334 for details).
  • A's location is the current location of UE A.
  • UE A may optionally request EPC support for direct discovery and communication by adding WLAN indications.
  • ProSe Function A transmits a Map Request (ALUID_A, ALUID_B) to the App Server providing the EPC ProSe User ID.
  • ProSe Function A stores Application Layer User IDs (ALUID_A and ALUID_B) until a Proximity Alert procedure or Proximity Request Cancellation procedure is performed or until the window expires.
  • step S1103 the App Server checks the application specific process permission of user B 'and confirms that User A is allowed to discover User B.
  • ProSe Function A sends a Map Response (EPUID_B PFID_B) indicating the ProSe Function ID of ProSe Function B (PFID_B).
  • ProSe Function A stores EPUID_B and PFID_B until a proximity proximity alert procedure or a proximity request cancellation procedure or a window expires.
  • step S1104 ProSe Function A propagates a proximity request (EPUID_B, EPUID_A, Application ID, window, A's location, [WLLID_A]) message to ProSe Function B.
  • step S1105 based on the received EPUID_B, the recording of the ProSe Function B subscriber B is retried.
  • ProSe Function B may request the HSS for the last position of UE B (step S1105a).
  • ProSe Function B may determine whether two UEs may enter a proximity relationship until the window expires. If it is determined that the proximity relationship cannot be entered, the proximity request rejection may be transmitted with an appropriate reason value (steps S1105b and c).
  • step S1106 according to the ProSe profile of the UE B, it may request that the UE B confirm the permission for the process request sent by the UE A.
  • ProSe Function B transmits the location report request of UE B to SLP B, and transmits a proximity request ACK to ProSe Function A. If UE B uses a permanent WLAN link layer ID, and UE A requested EPC support for WLAN direct discovery and communication, the WLAN link layer ID (WLLID_B) of UE B is included.
  • WLAN link layer ID (WLLID_B) of UE B is included.
  • ProSe Function A transmits a location report request to SLP A. If it is difficult to enter the proximity within the window, ProSe Function A may decide to cancel the proximity request. Otherwise, ProSe Function A sends a proximity request ACK to UE A.
  • FIG. 12 illustrates a procedure related to UE location reporting.
  • the positions of UE A and UE B are reported intermittently to each SLP (steps S1201 and 1203).
  • SLP A and SLP B report positions to ProSe Functions A and B, respectively (steps S1202 and S1204).
  • ProSe Function A determines proximity between UE A and UE B
  • ProSe Function B determines the position of UE B as ProSe.
  • step S1303 shows a procedure for proximity alert (Proximity Alert).
  • ProSe Function A detects that two UEs are in proximity (relationship) based on the requested discovery range class.
  • step S1304b the UE A transmits a proximity alert (Application ID, ALUID_B, Assistance Information). If UE A requests EPC support for WLAN direct discovery and communication, ProSe Function A may request ProSe Function B to send a proximity alert (Application ID, ALUID_A, Assistance Information) to UE B (steps S1305a-b).
  • step S1305c ⁇ d ProSe Function A and ProSe Function B cancels the location report request for UE A and UE B to SLP A and SLP B, respectively. If UE A has not requested EPC support for WLAN direct discovery and communication, in step S1306 ProSe Function A may initiate a cancellation of the process request by sending Cancel Proximity Request (EPUID_B, EPUID_A) to ProSe Function B. See FIG. 14 for a procedure related to canceling a process request.
  • Cancel Proximity Request EUID_B, EPUID_A
  • UE A may transmit a Cancel Proximity Request (EPUID_A, Application ID, ALUID_B) to Prose Function A.
  • Prose Function A may send Cancel Proximity Request (EPUID_B, EPUID_A) to Prose Function B.
  • EPUID_B EPUID_A
  • Prose Function A sends cancels location reporting to the SLP.
  • Prose Function A transmits Proximity Request Cancellation (Application ID, ALUID_B) to UE A.
  • a UE transmits a proximity request including a window to a ProSe Function, and if two UEs do not enter the proximity relationship until this window expires, the ProSe Function cancels the location report request to the SLP. In addition, the UE that performed the proximity request is informed that the proximity request has been cancelled.
  • ProSe Function A serving UE A cancels a proximity request to ProSe Function B serving UE B (S1402), and requests a location reporting for UE A requested to SLP A. Cancel (S1403), and inform the UE A that the proximity request has been canceled (S1406). That is, UE A is informed that it is not in close proximity to UE B within the time window.
  • ProSe Function B cancels the location report request for UE B that has previously requested to SLP B and ack a cancellation to ProSe Function A (S1404-S1405).
  • This conventional ProSe discovery does not take into account the situation where two UEs may be in close proximity immediately after a time window expires or after a short time (eg, within minutes). Although two UEs may not be in proximity within the time window, they may be in a proximity soon or shortly, thereby providing a better ProSe experience for users seeking to find other UEs / users by notifying the UE. Not considering Accordingly, the present invention provides an enhanced or extended ProSe discovery (or improved ProSe discovery) mechanism.
  • the ProSe function that receives a proximity request from the discoverer UE, including the window and the range, determines whether the discoverer UE enters a proximity relationship with the discoverer UE until the window expires. Can be. If the window cannot be entered into the proximity until the window expires, as described above, the discovery cancels the proximity request to the ProSe function related to the UE and sends a location report request requested to the SLP related to the discoverer UE. Cancel and notify the discovery UE that the proximity request has been cancelled.
  • the ProSe function decides to perform an enhanced ProSe discovery operation, the ProSe function does not cancel location reporting even when the window expires.
  • the location report may be an intermittent location report.
  • discovery does not cancel the proximity request to the ProSe function related to the UE.
  • the discovery UE is not informed that the proximity request has been cancelled. (More details on this will be described later.)
  • the determination of whether to perform the enhanced ProSe discovery operation may be performed as follows.
  • the proximity request may include time information ⁇ related to enhanced ProSe discovery.
  • the time information may be time information for allowing a ProSe function, which will be described later, to determine whether to perform an enhanced ProSe discovery operation.
  • the ProSe function may determine whether to perform an enhanced ProSe discovery operation based on the window ⁇ , the range ⁇ , and the distance ⁇ determined from the time information ⁇ related to the ProSe discovery.
  • the determined distance ⁇ may be determined by ⁇ / ⁇ * ⁇ . Specifically, when the distance between the discoverer UE and the discovery UE is within the sum of the determined distance ⁇ and range ⁇ , it may be determined to perform an enhanced ProSe discovery operation (for ⁇ time).
  • the proximity request may include distance information m related to enhanced ProSe discovery.
  • the distance information may be distance information between a discovery UE and a discovery UE, which will allow a ProSe function to be described later to determine whether to perform an enhanced ProSe discovery operation.
  • the ProSe function may determine to perform the enhanced ProSe discovery operation for a time t determined from the window ⁇ , range ⁇ , and distance information m related to the enhanced ProSe discovery, wherein the determined time t ) May be determined by ⁇ m / ⁇ * ⁇ .
  • the ProSe Function may consider various information such as moving speeds of two UEs for calculating the t value.
  • the ProSe function may determine to perform an enhanced ProSe discovery operation for 12 minutes.
  • the x value may be set in the ProSe Function or may be set in consideration of various information such as ⁇ , ⁇ , and ⁇ values, and moving speeds of two UEs.
  • the ⁇ value may be set in the ProSe Function, or may be set in consideration of various information such as m, ⁇ , ⁇ values, and moving speeds of two UEs.
  • the determination of whether to perform an enhanced ProSe discovery operation may be performed based on various information presented in the present invention, information conventionally provided when a discovery UE transmits a proximity request message, conventional information set in a ProSe function, and / or Or information about a discovery UE and a discovery UE that ProSe Function has (eg, distance information between two UEs and / or location information of two UEs, and / or movement information of two UEs, and / or a history of movement of two UEs) Information, etc.).
  • information conventionally provided when a discovery UE transmits a proximity request message conventional information set in a ProSe function, and / or Or information about a discovery UE and a discovery UE that ProSe Function has (eg, distance information between two UEs and / or location information of two UEs, and / or movement information of two UEs, and / or a history of movement of two UEs) Information, etc.).
  • the time information value for determining whether or not to perform an enhanced ProSe discovery operation is 10 minutes, and the discovery UE is located within 200 m upon the proximity request, the proximity request is requested, and the distance between the two UEs is currently 202 m.
  • the ProSe Function may determine that an enhanced ProSe discovery operation should be performed. That is, in this case, the ProSe Function may determine that two UEs may be in a proximity relationship within 10 minutes.
  • the determination of whether to perform the enhanced ProSe discovery operation may be determined based on one or more of the information listed in Table 2 below.
  • the time information may be actual time (eg x seconds, y minutes, etc.)
  • range class information of time e.g., upcoming / immediately, within seconds, within minutes, etc.
  • the distance information may be geographical distance information (eg, x meter) or range class information (eg, short, medium, maximum, etc.) of the distance.
  • the ProSe function determines to perform an enhanced ProSe discovery operation, the ProSe function does not cancel the location reporting operation for the UE that has previously requested the SLP.
  • the ProSe Function that is, the ProSe Function serving the discoverer UE, does not cancel the location reporting operation requested by the SLP to obtain the location information of the discoverer UE. That is to keep it.
  • This may be expressed as not performing step S1403 in FIG. 14.
  • the ProSe Function may enable the ProSe Function for serving the UE not to cancel the location reporting operation requested by the SLP to obtain the location information of the UE. That is to keep it. This may be expressed as not performing the step S1402, but a separate message may be transmitted for this purpose.
  • the ProSe function may include enhanced ProSe discovery related information. That is, when performing step S1406 in FIG. 14, the enhanced ProSe discovery related information is included.
  • the ProSe Function may transmit a message for notifying the enhanced ProSe discovery related information. That is, instead of performing step S1406, that is, instead of transmitting a proximity request cancellation message, another message (eg, a message newly defined for the present invention) may be transmitted.
  • the enhanced ProSe discovery related information may include one or more of the information listed in Table 3 below. It may be delivered explicitly, implicitly, or may be provided in a combined form.
  • the ProSe function may perform a proximity alert operation. This operation may be the procedure illustrated in FIG. 13.
  • the ProSe Function may additionally include information indicating that the alert message is a result of an enhanced ProSe discovery operation.
  • the ProSe function may request as shown in FIG. 14.
  • the cancellation operation can be performed.
  • the UE performing the proximity request may additionally include one or more of the information listed in Table 4 below in the proximity request message when transmitting the proximity request (S1101 of FIG. 11).
  • the following information may be explicit or implicit, or in combination with each other.
  • Table 4 Information requesting to perform an enhanced (Enhanced or Extended) ProSe discovery operation (for reference, the enhanced ProSe discovery operation refers to the operation of the UE and / or the operation of the ProSe function proposed in the present invention); When exceeded, the information requesting to be informed when the UE (ie discovery is in close proximity to the UE) is looking for-information about the time window to perform an enhanced ProSe discovery operation-whether the ProSe Function should perform an enhanced ProSe discovery operation.
  • the distance information may be geographical distance information (eg, x meters) or range class information (eg, short, medium, maximum, etc.) of the distance.
  • 'time window information for performing an enhanced ProSe discovery operation and time information for allowing a ProSe function to decide whether to perform an enhanced ProSe discovery operation' may be provided as one to include both meanings.
  • the discoverer UE that receives the enhanced ProSe discovery related information from the ProSe Function may receive the enhanced ProSe discovery related information from the ProSe Function.
  • the discoverer UE receiving this may perform one or more of the following operations.
  • a response to information requesting to respond whether to perform an enhanced ProSe discovery operation may be transmitted to the ProSe Function.
  • the UE may also transmit time window information for performing an enhanced ProSe discovery operation.
  • the conventional proximity request message may be extended and used, or a new message may be defined and used.
  • the above description is not limited to LTE / EPC networks, but is applicable to all UMTS / EPS mobile communication systems including both 3GPP access networks (eg, UTRAN / GERAN / E-UTRAN) and non-3GPP access networks (eg, WLAN, etc.). Can be. In addition, it can be applied in all other wireless mobile communication system environments in the environment where control of the network is applied.
  • 3GPP access networks eg, UTRAN / GERAN / E-UTRAN
  • non-3GPP access networks eg, WLAN, etc.
  • 15 is a diagram showing the configuration of a preferred embodiment of a terminal device and a network node device according to an example of the present invention.
  • the terminal device 100 may include a transmission / reception module 110, a processor 120, and a memory 130.
  • the transmission / reception module 110 may be configured to transmit various signals, data, and information to an external device, and receive various signals, data, and information to an external device.
  • the terminal device 100 may be connected to an external device by wire and / or wirelessly.
  • the processor 120 may control the overall operation of the terminal device 100, and may be configured to perform a function of the terminal device 100 to process and process information to be transmitted and received with an external device.
  • the processor 120 may be configured to perform a terminal operation proposed in the present invention.
  • the memory 130 may store the processed information for a predetermined time and may be replaced with a component such as a buffer (not shown).
  • the network node device 200 may include a transmission / reception module 210, a processor 220, and a memory 230.
  • the transmission / reception module 210 may be configured to transmit various signals, data, and information to an external device, and receive various signals, data, and information to an external device.
  • the network node device 200 may be connected to an external device by wire and / or wirelessly.
  • the processor 220 may control the overall operation of the network node device 200, and may be configured to perform a function of calculating and processing information to be transmitted / received with an external device.
  • the processor 220 may be configured to perform the network node operation proposed in the present invention.
  • the memory 230 may store the processed information for a predetermined time and may be replaced with a component such as a buffer (not shown).
  • the specific configuration of the terminal device 100 and the network device 200 as described above may be implemented so that the above-described matters described in various embodiments of the present invention can be applied independently or two or more embodiments are applied at the same time, overlapping The description is omitted for clarity.
  • Embodiments of the present invention described above may be implemented through various means.
  • embodiments of the present invention may be implemented by hardware, firmware, software, or a combination thereof.
  • a method according to embodiments of the present invention may include one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), and Programmable Logic Devices (PLDs). It may be implemented by field programmable gate arrays (FPGAs), processors, controllers, microcontrollers, microprocessors, and the like.
  • ASICs Application Specific Integrated Circuits
  • DSPs Digital Signal Processors
  • DSPDs Digital Signal Processing Devices
  • PLDs Programmable Logic Devices
  • FPGAs field programmable gate arrays
  • processors controllers, microcontrollers, microprocessors, and the like.
  • the method according to the embodiments of the present invention may be implemented in the form of a module, a procedure, or a function that performs the functions or operations described above.
  • the software code may be stored in a memory unit and driven by a processor.
  • the memory unit may be located inside or outside the processor, and may exchange data with the processor by various known means.

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  • Computer Networks & Wireless Communication (AREA)
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  • Mobile Radio Communication Systems (AREA)

Abstract

Selon un mode de réalisation, la présente invention concerne un procédé avec lequel une fonction de service de proximité (ProSe) effectue une découverte ProSe dans un système de communication sans fil, le procédé comprenant les étapes consistant : à recevoir, d'un équipement utilisateur (UE) qui effectue une découverte, une requête de proximité comprenant une fenêtre et une plage ; à déterminer si l'UE qui effectue une découverte entrera ou non dans une relation de proximité avec un UE qui est découvert avant que la fenêtre expire, lorsque la fonction ProSe détermine qu'une opération de découverte ProSe améliorée doit être effectuée, la fonction ProSe n'annulant pas un rapport de localisation même si la fenêtre expire.
PCT/KR2015/007796 2014-07-27 2015-07-27 Procédé pour effectuer une découverte prose dans un système de communication sans fil et dispositif associé Ceased WO2016018018A1 (fr)

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