WO2015156288A1 - 端末装置、リレー端末装置および通信制御方法 - Google Patents
端末装置、リレー端末装置および通信制御方法 Download PDFInfo
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- WO2015156288A1 WO2015156288A1 PCT/JP2015/060872 JP2015060872W WO2015156288A1 WO 2015156288 A1 WO2015156288 A1 WO 2015156288A1 JP 2015060872 W JP2015060872 W JP 2015060872W WO 2015156288 A1 WO2015156288 A1 WO 2015156288A1
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- 238000004891 communication Methods 0.000 title claims abstract description 1403
- 238000000034 method Methods 0.000 title claims abstract description 441
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- 238000010295 mobile communication Methods 0.000 abstract description 67
- 238000007726 management method Methods 0.000 description 34
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- 238000005516 engineering process Methods 0.000 description 6
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
- H04W40/20—Communication route or path selection, e.g. power-based or shortest path routing based on geographic position or location
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/03—Reselecting a link using a direct mode connection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/03—Reselecting a link using a direct mode connection
- H04W36/033—Reselecting a link using a direct mode connection in pre-organised networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/34—Modification of an existing route
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/20—Manipulation of established connections
- H04W76/23—Manipulation of direct-mode connections
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W92/00—Interfaces specially adapted for wireless communication networks
- H04W92/16—Interfaces between hierarchically similar devices
- H04W92/18—Interfaces between hierarchically similar devices between terminal devices
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
- H04W60/04—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration using triggered events
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
- H04W60/06—De-registration or detaching
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/11—Allocation or use of connection identifiers
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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
- H04W88/04—Terminal devices adapted for relaying to or from another terminal or user
Definitions
- the present invention relates to a terminal device, a relay terminal device, and a communication control method.
- Non-Patent Document 1 The standardization organization 3GPP (The 3rd Generation Generation Partnership Project) of the mobile communication system is working on the specification of EPS (Evolved Packet System) described in Non-Patent Document 1 below as the next generation mobile communication system.
- EPS Evolved Packet System
- Non-Patent Document 1 As an access system to be connected, not only LTE (Long Term Evolution) but also wireless LAN (Wireless LAN, WLAN) have been studied.
- a neighboring service for notifying the user terminal (User Equipment, UE) of the presence of other neighboring user terminals is studied. ing. Further, in ProSe, the UE aims to establish a direct communication path with a neighboring UE without going through a base station and directly transmit and receive data.
- ProSe performs direct data transmission / reception between UEs, data transmission / reception is possible without going through an access network based on a mobile communication network such as a core network or an access technology such as LTE. Expected.
- LTE Direct LTE access technology
- wireless LAN Wireless LAN
- the UE uses a commercial frequency allocated in the LTE system of each mobile communication carrier, and directly transmits and receives data between the UEs using the LTE communication method.
- WLAN Direct data is directly transmitted and received between UEs using a non-commercial frequency allocated in WLAN.
- the UE needs to search for a communication target UE and detect the presence of the communication target UE in the vicinity in order to transmit and receive data using LTE Direct or WLAN Direct as a service request condition. Yes.
- a group owner (GO, Group Owner) mode for communicating with a UE via a UE having a relay function and a decentralized mode for performing direct communication between UEs Is stipulated.
- a group owner (GO, Group Owner) is a UE that manages a group, and manages communication resources, information about security, and information about a group when direct communication is performed between the GO and the UE.
- the GO provides data transmission / reception between UEs by receiving data of direct communication transmitted from each UE and transferring the data to UEs in the group.
- each UE In the decentralized mode, information on communication resources, security, and information on groups are managed by each UE.
- each UE detects whether direct communication is not performed and starts direct communication.
- ProSe aims to provide a GO mode in which data is transmitted and received between UEs via GO and a decentralized mode in which each UE directly communicates with the UE. Furthermore, switching between the decentralized mode and the GO mode as required is under consideration.
- the GO mode is a desirable mode for UE1 and UE2 to communicate when UE1 cannot communicate directly with UE2, or when UE2 is not in the vicinity, but UE1 and UE2 can communicate directly,
- UE2 exists in the vicinity, since GO interposes, an unnecessary radio
- the UE and GO In order to switch from the GO mode to the decentralized mode, the UE and GO detect the switch to the decentralized mode, establish a communication path in the decentralized mode, and delete the communication path in the GO mode. There is a need to.
- the UE and the GO detect the switch to the GO mode, establish the communication path in the GO mode, and delete the communication path in the decentralized mode. There is a need to.
- the UE and the GO detect the switch to the decentralized mode, establish the communication path in the centralized mode, and delete the communication path in the GO mode. It is not.
- the UE and the GO detect the switch to the GO mode, establish the communication path in the GO mode, and delete the communication path in the decentralized mode. Means are not clear.
- the present invention has been made in view of such circumstances, and the UE that has transitioned from the GO mode to the decentralized mode during communication via the communication path in the GO mode continues to the decentralized mode while continuing the ProSe service.
- the ProSe service For switching to the communication path in the de-centralization mode, and the UE that has transitioned from the de-centralization mode to the GO mode during the communication via the communication path in the de-centralization mode continues the ProSe service and switches to the communication path in the GO mode It is to provide each processing of a terminal device, a base station, a location management device, a subscriber management device, and a mobile communication system, etc.
- a relay terminal device for transferring data transmitted from the terminal device to the base station device, establishing a first communication path in a first mode for transferring data transmitted from the base station device to the terminal device;
- data transmission / reception is switched to the second communication path in the second mode in which data is directly transmitted to / from a terminal apparatus existing in the vicinity of the relay terminal apparatus during data transmission / reception in the first communication path in the first mode
- a request message for requesting switching to the second communication path in the second mode including information indicating switching to the second communication path in the second mode to the terminal device,
- the response message for the request message to be requested is received, the second channel in the second mode is established, and the data of the first channel in the first mode And it switches the transceiver to the second communication path in the second mode.
- the relay terminal device establishes a second communication path in the second mode for directly transmitting data with a terminal device that is in the vicinity of the relay terminal apparatus, and the data is transmitted in the second communication path in the second mode.
- data transmission / reception is switched to the first communication path in the first mode in which data transmitted from the terminal device is transferred to the base station device and data transmitted from the base station device is transferred to the terminal device during transmission / reception
- a request message for requesting switching to the first communication path in the first mode is sent to the terminal apparatus, and information indicating switching to the first communication path in the first mode is requested from the terminal apparatus.
- a response message to the request message is established, the first communication channel in the first mode is established, and the data of the second communication channel in the second mode is And switches receive the first communication path in the first mode.
- the message for requesting switching is a request message for requesting establishment of a communication path.
- the message for requesting switching is a request message for requesting deletion of the communication path.
- the request message for requesting switching includes information for identifying a terminal device or a relay terminal device or information indicating a connection destination.
- information indicating switching to the first communication path in the first mode is included.
- a request message for requesting switching to the first communication path in the first mode is transmitted to the relay terminal device, and a response message to the request message for requesting switching is received from the relay terminal device;
- One communication path is established, and data transmission / reception on the second communication path in the second mode is switched to the first communication path in the first mode. And wherein the door.
- a terminal device that establishes a first communication path in a first mode for transmitting data via a relay terminal device existing in the vicinity of the terminal device, and data in the first communication path in the first mode
- switching to the second communication path in the second mode for directly transmitting data to and from the second terminal apparatus existing in the vicinity of the terminal apparatus during transmission / reception switching to the second communication path in the second mode
- a request message for requesting switching to the second communication path in the second mode is transmitted to the second terminal device, and a response message for the request message requesting switching is sent from the second terminal device.
- Receive establish a second communication channel in the second mode, and switch data transmission / reception of the first communication channel in the first mode to the second communication channel in the second mode. And wherein the frog.
- a request message for requesting switching to the first communication path in the first mode is transmitted to the second terminal device, and a response message for the request message requesting switching is sent from the second terminal device.
- the request message for requesting switching is a request message for requesting establishment of a communication path.
- the request message for requesting switching is a request message for requesting deletion of a communication path.
- the request message for requesting switching includes information identifying a terminal device or a relay terminal device or information indicating a connection destination.
- a communication control method for a relay terminal device wherein the first communication path in the first mode is to transfer data transmitted from the terminal device to the base station device and transfer data transmitted from the base station device to the terminal device.
- the data is transmitted to the second communication channel in the second mode in which data is directly transmitted to the terminal device existing in the vicinity of the relay terminal device during data transmission / reception in the first communication channel in the first mode.
- a communication control method for a relay terminal device which establishes a second communication path in a second mode in which data is directly transmitted to a terminal device existing in the vicinity of the relay terminal device, and a second communication in the second mode.
- the data transmitted from the terminal apparatus is transferred to the base station apparatus, and the data transmitted from the base station apparatus is transferred to the terminal apparatus.
- the step of transmitting to the terminal device a request message for requesting switching to the first communication path in the first mode, including information indicating switching to the first communication path in the first mode;
- flop characterized in that it comprises a step of switching transmission and reception of the second communication path of the data in the second mode to the first communication path in the first mode, the.
- a communication control method for a terminal device which establishes a second communication channel in a second mode for directly transmitting data to and from a relay terminal device existing in the vicinity of the terminal device, and a second communication channel in the second mode
- the terminal apparatus switches to the first communication path in the first mode.
- a request message for requesting switching to the first communication path in the first mode including information indicating switching, to the relay terminal device; and a response message for the request message requesting switching from the relay terminal device.
- a communication control method for a terminal device wherein a first communication path in a first mode for transmitting data via a relay terminal device existing in the vicinity of the terminal device is established, and a first communication in the first mode is established.
- the second in the second mode A step of transmitting a request message for requesting switching to the second communication path in the second mode, including information indicating switching to the communication path, to the second terminal apparatus, and requesting switching from the second terminal apparatus
- Receiving a response message to the request message establishing a second communication path in the second mode, and first communication path in the first mode
- a step of switching transmission and reception of over data to the second communication path in the second mode characterized in that it comprises a.
- a communication control method for a terminal device wherein a second communication path in a second mode for directly transmitting data to a second terminal device existing in the vicinity of the terminal device is established, and a second communication in the second mode is established.
- the first communication in the first mode A request message for requesting switching to the first communication path in the first mode, including information indicating switching to the path, to the second terminal device, and requesting switching from the second terminal device Receiving a response message to the request message; establishing a first communication path in the first mode; and deselecting a second communication path in the second mode. Characterized in that it comprises a step of switching transmission and reception of data to the first communication path in the first mode, the.
- the request message for requesting switching is a request message for requesting establishment of a communication path.
- the request message for requesting switching is a request message for requesting deletion of a communication path.
- the request message for requesting switching includes information identifying a terminal device or a relay terminal device or information indicating a connection destination.
- the mobile communication carrier establishes the communication mode in the GO mode by the communication source UE and the communication destination UE, and switches the GO mode to the decentralized mode during data transmission / reception. It is possible to switch from the communication channel in the communication channel to the decentralized mode communication channel.
- the mobile communication carrier establishes a communication path in the decentralized mode by the communication source UE and the communication destination UE, and switches from the decentralized mode to the GO mode during transmission / reception of data. It is possible to switch from the communication path in the communication mode to the communication path in the GO mode.
- FIG. 1 It is a figure for demonstrating the switching procedure to the decentralized mode in 1st Embodiment. It is a figure for demonstrating the communication path establishment procedure of the decentralized mode in 1st Embodiment. It is a figure for demonstrating the communication path deletion procedure of GO mode in 1st Embodiment. It is a figure for demonstrating management of the communication path of the decentralized mode in 1st Embodiment. It is a figure for demonstrating the switch procedure to the decentralized mode in the modification 1. FIG. It is a figure for demonstrating the communication path establishment procedure of the decentralized mode in the modification 1. FIG. It is a figure for demonstrating the communication path deletion procedure of GO mode in the modification 1. FIG.
- FIG. 1 It is a figure for demonstrating the switching procedure to the decentralized mode in 3rd Embodiment. It is a figure for demonstrating the management of the communication path of the decentralized mode in 3rd Embodiment. It is a figure for demonstrating the switching procedure to GO mode in 4th Embodiment. It is a figure for demonstrating selection of UE-R in 4th Embodiment. It is a figure for demonstrating the switching procedure to GO mode in the modification 3.
- FIG. 1 It is a figure for demonstrating the switching procedure to the decentralized mode in 3rd Embodiment. It is a figure for demonstrating the management of the communication path of the decentralized mode in 3rd Embodiment. It is a figure for demonstrating the switching procedure to GO mode in 4th Embodiment. It is a figure for demonstrating selection of UE-R in 4th Embodiment. It is a figure for demonstrating the switching procedure to GO mode in the modification 3.
- FIG. 1 It is a figure for
- LTE Direct is written as LTE (D).
- LTE (D) indicates a direct communication path between UEs established using the LTE communication scheme.
- FIG. 1 is a diagram for explaining an outline of a mobile communication system 1 in the present embodiment.
- a mobile communication system 1 is configured such that a UE ((terminal devices) UE10a and UE10b), a UE-R (relay terminal device) 15, and a PDN (Packet Data Network) 80 move by IP. They are connected via a communication network 5.
- a ProSe Server 90 is connected to the PDN 80.
- UE 10a and UE-R 15 are located in the vicinity and can be connected via LTE (D).
- UE 10b and UE-R 15 are located in the vicinity and can be connected via LTE (D).
- the UE 10a and the UE 10b are similar devices, and the description of the UE 10 will be described below as being applicable to both the UE 10a and the UE 10b.
- the UE-R 15 is connected to the IP mobile communication network 5, and the IP mobile communication network 5 is connected to the PDN 80.
- the IP mobile communication network 5 may be, for example, a network constituted by a radio access network and a core network operated by a mobile communication carrier, or a broadband network operated by a fixed communication carrier.
- the broadband network may be an IP mobile communication network operated by a telecommunications carrier that is connected by ADSL (Asymmetric Digital Subscriber Line) or the like and provides high-speed communication using a digital line such as an optical fiber.
- ADSL Asymmetric Digital Subscriber Line
- the network is not limited to these, and may be a network that performs wireless access using WiMAX (Worldwide Interoperability for Microwave Access) or the like.
- the UE 10 and the UE-R 15 are communication terminals that are connected using an access system such as LTE or WLAN, and are connected to the IP access network by being mounted with a 3GPP LTE communication interface, a WLAN communication interface, or the like. It is possible.
- Specific examples are mobile phone terminals and smartphones, and other tablet computers, personal computers, and home appliances with other communication functions.
- the PDN 80 is a network that provides a network service that transmits and receives data in packets, and is, for example, the Internet or IMS. Further, it may be a network that provides group communication services such as group calls.
- the PDN 80 may include an application server or an application server for group communication (GCSE AS: Group Communication Service Enablers Application Server).
- the application server is a server that manages control information and identification information related to an application used by the UE 10, and notifies the control information and identification information to the UE 10 and the UE-R 15 as necessary.
- the GCSE AS is a server that manages control information and identification information related to an application for performing group communication, and notifies the control information and identification information to the UE 10 and the UE-R 15 as necessary.
- the UE-R 15 is a relay terminal device, and the UE-R 15 can establish and connect a direct communication path using LTE (D) with a plurality of terminal devices as well as the UE 10. Furthermore, the relay terminal device is a terminal device having a relay function, and the UE-R 15 establishes a communication path by connecting to the IP mobile communication network and establishes connectivity with the PDN 80.
- LTE LTE
- the UE-R 15 has a relay function for relaying communication between the UE 10 and the PDN 80, whereby the UE 10 realizes data transmission / reception with the PDN 80.
- the UE 10 and the UE-R 15 may have different configurations only in the presence or absence of the relay function.
- the UE-R 15 can manage a group as a group owner (GO, Group Owner). Group management includes registration of group members (UE, user) and deletion of group members. Note that members registered in a group can send and receive data between members registered in the group.
- the PDN 80 is connected to the IP access network using a wired line or the like.
- a wired line or the like is constructed by ADSL (Asymmetric Digital Subscriber Line), an optical fiber or the like.
- ADSL Asymmetric Digital Subscriber Line
- the present invention is not limited to this, and a wireless access network such as LTE (Long Term Evolution), WLAN (Wireless LAN), and WiMAX (Worldwide Interoperability for Microwave Access) may be used.
- LTE Long Term Evolution
- WLAN Wireless LAN
- WiMAX Worldwide Interoperability for Microwave Access
- the mobile communication system 1 includes a UE 10, a UE-R 15, an IP mobile communication network 5, and a PDN 80 (Packet Data Network).
- a plurality of communication terminals may be connected to the UE-R 15 like the UE 10a and the UE 10b. These communication terminals have the same configuration as the UE 10.
- a terminal device having a plurality of relay functions can be connected to the IP mobile communication network 5 in addition to the UE-R 15.
- Such a terminal device has the same configuration as the UE-R, and a description thereof is omitted for simplification of the drawing.
- the IP mobile communication network 5 includes a core network 7 and a radio access network (for example, LTE AN9).
- a radio access network for example, LTE AN9
- the core network 7 includes an MME 30 (Mobile Management Entity), an SGW 40 (Serving Gateway), a PGW (Access Control Device) 50 (Packet Data Network Gateway), an HSS 60 (Home Subscriber Server), and a PCRF 70 (Policy and charging rules Rules function). ).
- MME 30 Mobile Management Entity
- SGW 40 Serving Gateway
- PGW Access Control Device
- HSS 60 Home Subscriber Server
- PCRF 70 Policy and charging rules Rules function
- the radio access network is connected to the core network 7. Furthermore, the UE-R 15 can be wirelessly connected to the radio access network.
- an LTE access network (LTE AN9) that can be connected by the LTE access system can be configured.
- the PGW 50 is divided into a PDN 80, an SGW 40, and a PCRF 70. It is connected and performs user data delivery as a gateway device between the PDN 80 and the core network 7.
- the SGW 40 is connected to the PGW 50, the MME 30, and the LTE AN 9, and delivers user data as a gateway device between the core network 7 and the LTE AN 9.
- the MME 30 is a location management device that is connected to the SGW 40, the HSS 60, and the LTE AN 9, and performs location management and access control of the UE 10 via the LTE AN 9.
- the HSS 60 is connected to the Prose Server 90, the MME 30, and the SGW 40, and manages subscriber information.
- the PCRF 70 is connected to the PGW 50 and the PDN 80, and performs QoS management for data delivery.
- the ProSe Server 90 is a server device that is connected to the MME 30 and manages establishment of a direct communication path between communication terminals.
- the ProSe Server 90 may be configured as a single device with the MME 30 or may be configured as independent devices.
- the example comprised by including in the core network 7 was shown, not only this but it may be comprised including in PDN80 like FIG.
- it may be configured as a single device with the GCSE included in the PDN that provides the group communication service.
- the ProSe Server 90 may be configured as a ProSe Function as a network function. Further, the ProSe Function 90 may be configured as a part of the function of a certain device.
- the radio access network includes devices (for example, base station devices and access point devices) to which the UE-R 15 is actually connected.
- devices for example, base station devices and access point devices
- various devices adapted to the radio access network can be considered.
- the LTE AN 9 includes the eNB 20.
- the eNB 20 is a radio base station to which the UE-R 15 is connected in the LTE access system, and the LTE AN 9 may be configured to include one or a plurality of radio base stations.
- that the UE-R 15 is connected to the radio access network means that the UE-R 15 is connected to a base station apparatus included in the radio access network. Or via an access point.
- the UE-R 15 being connected to the LTE AN 9 means that the UE-R 15 is connected via the eNB 20.
- each UE 10 can establish a communication path in GO mode (Group Owner mode, group owner mode) and decentralized mode.
- GO mode Group Owner mode, group owner mode
- each UE is connected to the IP mobile communication network 5 via the UE-R 15 in which each UE is a GO (Group Owner, group owner).
- the UE 10a transmits and receives data via the UE-R 15.
- the UE 10b transmits and receives data via the UE-R 15.
- the UE 10a transmits data to the UE 10b
- the UE 10a transmits to the UE 10b via the UE-R 15, the LTE AN 9, the core network 7, and the PDN 80, and further from the PDN 80 to the UE 10b via the core network 7, the LTE AN 9, and the UE-R 15.
- the UE-R 15 may directly transmit the data from the UE 10a to the UE 10b without passing through the LTE AN 9, the core network 7, and the PDN 80.
- the UE 10b transmits data to and from the UE 10a
- the UE 10b transmits to the UE 10a via the UE-R 15, the LTE AN 9, the core network 7, and the PDN 80, and further from the PDN 80 to the UE 10a via the core network 7, the LTE AN 9, and the UE-R 15.
- the UE-R 15 may directly transmit the data from the UE 10b to the UE 10a without passing through the LTE AN 9, the core network 7, and the PDN 80.
- FIG. 2 shows an example of data transmission / reception in the decentralized mode in the first embodiment.
- the UE 10a and the UE 10b do not transmit / receive data via the UE-R 15, but directly transmit / receive data between the UEs.
- the UE 10a does not transmit / receive data via the UE-R 15, but directly communicates with the UE 10b and / or the UE-R 15.
- the UE 10b communicates directly with the UE-R 15 and / or the UE 10a.
- the UE-R 15 is the same group as the UE 10a and the UE 10b, and the UE-R 15 can transmit and receive data with the UE 10a and the UE 10b through a direct communication path.
- the functional configuration of the UE 10 in the present embodiment will be shown based on FIG. Note that the UE 10 has the same configuration in the UE 10a and the UE 10b.
- a first interface unit 110, a second interface unit 120, and a storage unit 140 are connected to the control unit 100 via a bus.
- the control unit 100 is a functional unit for controlling the UE 10.
- the control unit 100 implements various processes by reading and executing various information and various programs stored in the storage unit 140.
- the first interface unit 110 is a functional unit that establishes a direct communication path with another communication terminal or the UE-R 15 by the LTE access method and performs transmission / reception of data by wireless communication.
- An external antenna 112 is connected to the first interface unit 110.
- the UE 10 can also establish a direct communication path with another UE 10 or the UE-R 15 via the first interface unit without going through the LTE base station and perform communication.
- the second interface unit 120 is a functional unit that connects to the eNB 20 by the LTE access method, establishes a communication path to the PDN 80 via the core network 7, and executes transmission / reception of data by wireless communication.
- An external antenna 122 is connected to the second interface unit 120.
- the UE 10 can also connect to the LTE AN 9 via the second interface unit 120, establish a communication path with the PDN 80 via the core network 7, and transmit / receive data.
- the storage unit 140 is a functional unit that stores programs, data, and the like necessary for various operations of the UE 10.
- the storage unit 140 includes, for example, a semiconductor memory, an HDD (Hard Disk Drive), or the like. Furthermore, the storage unit 140 stores a UE communication path context 142, group identification information 144, and a mode management table 148.
- FIG. 4A shows an example of the UE communication path context 142.
- 4A is a group of information stored in association with a communication path established by the UE, and includes an APN (access point name), bearer ID, PDN connection ID, TEID (Tunnel (Endpoint). Identifier) and TFT (Traffic Flow Template).
- APN access point name
- bearer ID PDN connection ID
- TEID Tunnel (Endpoint). Identifier
- TFT Traffic Flow Template
- the APN access point name
- the APN is identification information used for selecting the PGW 50 in the IP mobile communication network 5 and is identification information associated with the PDN 80.
- a different PDN 80 is configured for each service, such as IMS or video distribution, it can also be used as identification information for identifying the service.
- the bearer ID is information for identifying a radio bearer that is a radio communication path between the UE 10 and the UE-R 15 established when the UE 10 is connected to the UE-R 15. Moreover, the information which identifies the radio bearer which is a radio
- wireless communication path between UE10 and eNB20 established when UE10 connects with eNB20 may be sufficient.
- the PDN connection ID is information for identifying a PDN connection that is a logical path established between the UE 10 and the PGW 50.
- the TEID is identification information of a tunnel communication path for delivering user data constituting a PDN connection, and is identification information of a tunnel communication path established based on the GTP protocol, the Mobile IP protocol, and the Proxy Mobile IP protocol. It's okay.
- the TFT is transmission destination setting information defined for each application, and the UE 10 determines a transmission destination using the TFT when data transmission occurs in a certain application.
- the TFT and bearer ID may be managed in association with each other and used to determine the data transmission destination. Note that when determining the transmission destination, information related to communication quality may be set in association with each other, and data may be transmitted according to the communication quality.
- the UE communication path context 142 may include a UE identifier, base station identification information, service identification information, and the like.
- the UE identifier is an identifier for identifying the UE 10 (UE 10a, UE 10b) or the UE-R 15.
- the base station identification information may be information for identifying the UE-R 15 or information for identifying the eNB 20.
- the base station identification information may be configured by combining a carrier identification code for identifying a mobile communication carrier that provides a communication service and a base station identification code. Thereby, it can be set as unique identification information in a plurality of mobile communication networks provided by a plurality of mobile communication carriers.
- the service identification information is information for identifying a service provided by the mobile communication carrier on the IP mobile communication network 5.
- the service identification information may be APN or service domain identification information such as FQDN (Fully Qualified Domain Name). Not limited to this, it may be identification information associated with a service. Further, the service may be a voice call service based on IMS, a video distribution service, or a service that provides group communication.
- the service identification information is identification information for identifying such a service.
- FIG. 4B shows an example of the group identification information 144.
- the UE 10 manages the group identification information of the group 1 and the group 2.
- the group identification information 144 may be information for identifying a group when two or more communication terminals form a group and perform communication between the groups. Further, when there are a plurality of contents to be delivered to the group, information for identifying these contents may be used.
- it may be information for identifying a terminal group when performing a broadcast call with a plurality of communication terminals.
- it may be information for identifying a session for a call.
- identification information that identifies a terminal that receives the video distribution as a group may be used, or identification information that identifies a distribution video when there are a plurality of videos It may be.
- the group identification information may be an IP multicast address or TMSI (Temporary Mobile Subscriber Identify) which is a temporary ID used for user authentication assigned by a communication carrier. It is not limited to this and may be information for identifying a group such as an email address.
- the group identification information 144 may be included in the UE communication path context 142.
- FIG. 4 (c) shows the mode management table 148.
- the mode management table 148 GO mode or decentralized mode information is managed.
- the GO mode is managed.
- the UE 10 may manage the GO mode in accordance with establishment of the communication path in the GO mode or switching to the GO mode.
- the UE 10 may manage the decentralized mode in accordance with establishment of the decentralized mode communication path or switching of the decentralized mode communication path.
- the mode management table 148 may be included in the UE communication path context 142.
- the UE 10 may manage permission information indicating that switching between the GO mode and the decentralized mode can be performed.
- UE10 may manage the permission information which shows only that it can switch between GO mode and decentralized mode (permission).
- the UE 10 includes permission information indicating that it is possible to switch between the GO mode and the decentralized mode (permission) and that it is not possible to switch between the GO mode and the decentralized mode (not permitted). You may manage.
- permission information indicating that switching between the GO mode and the decentralized mode can be performed may be managed by the UE communication path context 142.
- FIG. 5 shows a functional configuration of the UE-R 15 in the present embodiment.
- a first interface unit 1510 a second interface unit 1520, a data transfer unit 1530, and a storage unit 1540 are connected to a control unit 1500 via a bus.
- the control unit 1500 is a functional unit for controlling the UE-R 15.
- the control unit 1500 implements various processes by reading and executing various information and various programs stored in the storage unit 1540.
- the first interface unit 1510 is a functional unit that establishes a direct communication path with other communication terminals such as the UE 10 by the LTE access method, and transmits and receives data by wireless communication.
- An external antenna 1512 is connected to the first interface unit 1510.
- the UE-R 15 can also establish a direct communication path with another communication terminal such as the UE 10 via the first interface unit without using the LTE base station, and can perform communication.
- the second interface unit 1520 is a functional unit that connects to the eNB 20 by the LTE access method, establishes a communication path to the PDN 80 via the core network 7, and executes transmission / reception of data by wireless communication.
- An external antenna 1522 is connected to the second interface unit 1520.
- the UE-R 15 can also connect to the LTE AN 9 via the second interface unit 1520, establish a communication path with the PDN 80 via the core network 7, and transmit / receive data.
- the storage unit 1540 is a functional unit that stores programs, data, and the like necessary for various operations of the UE-R 15.
- the storage unit 1540 includes, for example, a semiconductor memory, an HDD (Hard Disk Drive), or the like. Furthermore, the storage unit 1540 stores a UE-R channel context 1542, group identification information 1544, and a mode management table 1548.
- FIG. 6A shows an example of the UE-R channel context 1542.
- the UE-R channel context 1542 is a group of information managed in association with a channel established by the UE-R 15, and includes a PDN connection ID, an APN (access point name), a bearer ID, and a TEID (TunnelunEndpoint Identifier). , TFT (Traffic Flow Template) is included. Note that the UE-R channel context 1542 may include base station identification information, service identification information, and the like.
- the PDN connection ID is information for identifying a PDN connection that is a logical path established between the UE 10 and the PGW 50.
- the APN access point name
- the APN is identification information used for selecting the PGW 50 in the IP mobile communication network 5 and is identification information associated with the PDN 80.
- PDN 80 different for each service such as IMS or video distribution is configured, it can also be used as identification information for identifying the service.
- the bearer ID is information for identifying a radio bearer that is a radio communication path between the UE 10 and the UE-R 15 established when the UE 10 is connected to the UE-R 15. Moreover, when UE10 connects to eNB20, the information which identifies the radio
- the TEID is identification information of a tunnel communication path for delivering user data constituting a PDN connection, and is identification information of a tunnel communication path established based on the GTP protocol, the Mobile IP protocol, and the Proxy Mobile IP protocol. It's okay.
- the TFT is transmission destination setting information defined for each application, and the UE-R 15 determines the transmission destination using the TFT when data transmission occurs in a certain application.
- the TFT and bearer ID may be managed in association with each other and used to determine the data transmission destination. Note that when determining the transmission destination, information related to communication quality may be set in association with each other, and data may be transmitted according to the communication quality.
- the base station identification information may be information for identifying the UE-R 15 or information for identifying the eNB 20.
- the base station identification information may be configured by combining a carrier identification code for identifying a mobile communication carrier that provides a communication service and a base station identification code. Thereby, it can be set as unique identification information in a plurality of mobile communication networks provided by a plurality of mobile communication carriers.
- the service identification information is information for identifying a service provided by the mobile communication carrier on the IP mobile communication network 5.
- the service identification information may be APN or service domain identification information such as FQDN (Fully Qualified Domain Name). Not limited to this, it may be identification information associated with a service. Further, the service may be a voice call service based on IMS, a video distribution service, or a service that provides group communication.
- the service identification information is identification information for identifying such a service.
- the UE-R channel context 1542 may be held for each channel. For example, you may hold
- the base station information of the UE-R communication path context 1542 for the direct communication path may be information for identifying the UE-R 15, and the UE-R communication path context 1542 for the communication path connected to the eNB 20 and connected to the PGW 50.
- the base station information may be information for identifying the eNB 20.
- the UE-R communication path context 1542 may be held including the identification information of the UE-R 15.
- the identification information of UE-R 15 may be subscriber identification information associated with UE-R 15 such as IMSI (International Mobile Subscriber Identity), or may be an IP address assigned to UE-R 15.
- IMSI International Mobile Subscriber Identity
- FQDN Full-NQualified Domain Name
- the UE-R channel context 1542 may store information for identifying the location management device.
- the information for identifying the location management device may be an IP address assigned to the location management device, or information such as FQDN (FullyFullQualified Domain Name) associated with the location management device.
- FQDN FullFullQualified Domain Name
- it may be a globally unique GMMEI (Globally Unique MME Identifier), or a GUTI composed of GUTI and TMSI (Temporary Mobile Subscriber Identity) which is a temporary ID used for user authentication assigned by the operator. (Global
- Identity) may be sufficient.
- FIG. 6B shows an example of the group identification information 1544.
- the UE-R 15 manages the group identification information of the group 1 and the group 2.
- the group identification information 1544 may be information for identifying a group when two or more communication terminals form a group and perform communication between the groups. Further, when there are a plurality of contents to be delivered to the group, information for identifying these contents may be used.
- it may be information for identifying a terminal group when performing a broadcast call with a plurality of communication terminals.
- it may be information for identifying a session for a call.
- identification information that identifies a terminal that receives the video distribution as a group may be used, or identification information that identifies a distribution video when there are a plurality of videos It may be.
- the group identification information may be an IP multicast address or TMSI (Temporary Mobile Subscriber Identify) which is a temporary ID used for user authentication assigned by a communication carrier. It is not limited to this and may be information for identifying a group such as an email address.
- the group identification information 1544 may be included in the UE-R communication path context 1542.
- FIG. 6C shows a mode management table 1548.
- the mode management table 1548 GO mode or decentralized mode information is managed.
- the GO mode is managed.
- the UE 10 may manage the GO mode in accordance with establishment of the communication path in the GO mode or switching to the GO mode.
- the UE 10 may manage the decentralized mode in accordance with establishment of the decentralized mode communication path or switching of the decentralized mode communication path.
- the mode management table 148 may be included in the UE-R communication path context 1542.
- the UE-R 15 may manage permission information indicating that switching between the GO mode and the decentralized mode can be performed.
- the UE-R 15 may manage permission information indicating only that the GO mode and the decentralized mode can be switched (permission).
- the UE-R 15 is permitted to indicate that it is possible to switch between the GO mode and the decentralized mode (permitted), and that it is not possible to switch between the GO mode and the decentralized mode (not permitted). Information may be managed.
- permission information indicating that switching between the GO mode and the decentralized mode can be performed may be managed by the UE-R communication path context 1542.
- the data transfer unit 1530 transfers the received data from the UE 10 received via the first interface unit 1510 to the IP mobile communication network via the second interface unit 1520, and further receives the data via the second interface unit 1520.
- This is a functional unit that transfers reception data addressed to the UE 10 to the UE 10 via the first interface unit 1510.
- the UE-R 15 is not limited to the UE 10 and may be connected to a plurality of communication terminals.
- the eNB 20 may be connected not only to the UE-R 15 but also to a communication terminal having a plurality of relay functions. Since the configuration of the communication terminal having these relay functions is the same as that of the UE-R 15, detailed description thereof is omitted.
- FIG. 20 A functional configuration of the eNB 20 in the present embodiment is shown based on FIG.
- a first interface unit 210, a second interface unit 220, a data transfer unit 230, and a storage unit 240 are connected to the control unit 200 via a bus.
- the control unit 200 is a functional unit for controlling the eNB 20.
- the control unit 200 implements various processes by reading and executing various information and various programs stored in the storage unit 240.
- the first interface unit 210 is a functional unit that establishes a wireless communication path with other communication terminals such as the UE-R 15 and the UE 10 by the LTE access method, and executes data transmission / reception by wireless communication.
- An external antenna 212 is connected to the first interface unit 210.
- the second interface unit 220 is connected to the core network 7 by a wired connection to the core network. Connection to the core network 7 may be made by Ethernet (registered trademark) or an optical fiber cable.
- the storage unit 240 is a functional unit that stores programs, data, and the like necessary for various operations of the eNB 20.
- the storage unit 240 includes, for example, a semiconductor memory, an HDD (Hard Disk Drive), or the like. Further, the storage unit 240 stores an eNB communication path context 242.
- the eNB communication path context 242 is a group of information stored in association with a communication path established with the UE-R 15 or the UE 10, and includes an APN (access point name), bearer ID, PDN connection ID, TEID (Tunnel Endpoint Identifier), base station identification information, service identification information, group identification information, and the like.
- APN access point name
- bearer ID bearer ID
- PDN connection ID PDN connection ID
- TEID Tel Endpoint Identifier
- base station identification information service identification information
- service identification information service identification information
- group identification information and the like.
- the APN access point name
- the APN is identification information used for selecting the PGW 50 in the IP mobile communication network 5 and is identification information associated with the PDN 80.
- PDN 80 different for each service such as IMS or video distribution is configured, it can also be used as identification information for identifying the service.
- the bearer ID is information for identifying a radio bearer that is a radio communication path between the UE 10 and the UE-R 15 established when the UE 10 is connected to the UE-R 15. Moreover, when UE10 connects to eNB20, the information which identifies the radio
- the PDN connection ID is information for identifying a PDN connection that is a logical path established between the UE 10 and the PGW 50.
- the TEID is identification information of a tunnel communication path for delivering user data constituting a PDN connection, and is identification information of a tunnel communication path established based on the GTP protocol, the Mobile IP protocol, and the Proxy Mobile IP protocol. It's okay.
- the base station identification information may be information for identifying the UE-R 15 or information for identifying the eNB 20.
- the base station identification information may be configured by combining a carrier identification code for identifying a mobile communication carrier that provides a communication service and a base station identification code. Thereby, it can be set as unique identification information in a plurality of mobile communication networks provided by a plurality of mobile communication carriers.
- the base station identification information may be an IP address assigned to the base station, or may be identification information such as FQDN (Fully Qualified Domain Name).
- the information for identifying the UE-R 15 may be an IP address assigned to the UE-R 15 or may be identification information such as FQDN (Fully Qualified Domain Name).
- the service identification information is information for identifying a service provided by the mobile communication carrier on the IP mobile communication network 5.
- the service identification information may be APN or service domain identification information such as FQDN (Fully Qualified Domain Name). Not limited to this, it may be identification information associated with a service. Further, the service may be a voice call service based on IMS, a video distribution service, or a service that provides group communication.
- the service identification information is identification information for identifying such a service.
- the group identification information may be information for identifying a group when two or more communication terminals form a group and perform communication between the groups. Further, when there are a plurality of contents to be delivered to the group, information for identifying these contents may be used.
- it may be information for identifying a terminal group when performing a broadcast call with a plurality of communication terminals.
- it may be information for identifying a session for a call.
- identification information that identifies a terminal that receives the video distribution as a group may be used, or identification information that identifies a distribution video when there are a plurality of videos It may be.
- the group identification information may be an IP multicast address or TMSI (Temporary Mobile Subscriber Identify) which is a temporary ID used for user authentication assigned by a communication carrier. It is not limited to this and may be information for identifying a group such as an email address.
- TMSI Temporal Mobile Subscriber Identify
- the eNB communication path context 242 may be held for each communication path. For example, a communication path established with the UE-R 15 and a communication path with a communication terminal having another relay function may be held.
- the base station information of the channel context for the direct communication channel may store information for identifying the UE-R 15 and information for identifying the eNB 20.
- the data transfer unit 230 transfers received data from the UE-R 15 received via the first interface unit 210 to the IP mobile communication network via the second interface unit 220, and further via the second interface unit 220. This is a functional unit that transfers received data addressed to the UE 10 to the UE 10 via the UE-R 15 using the first interface unit 210.
- the MME 30 is a location management device that determines permission or disapproval regarding establishment of a communication path and service provision of the UE 10.
- Fig. 8 shows the functional configuration of the MME30.
- an IP mobile communication network interface unit 410 and a storage unit 440 are connected to the control unit 400 via a bus.
- the control unit 400 is a functional unit for controlling the UE 10.
- the control unit 400 implements various processes by reading and executing various programs stored in the storage unit 440.
- the IP mobile communication network interface unit 410 is a functional unit for the MME 30 to connect to the IP mobile communication network 5.
- the storage unit 440 is a functional unit that records programs, data, and the like necessary for various operations of the MME 30.
- the storage unit 440 includes, for example, a semiconductor memory, an HDD (Hard Disk Drive), or the like. Further, the storage unit 440 stores an MME communication path context 442.
- the MME communication channel context 442 is a group of information stored in association with the direct communication channel established between the UE-R 15 and the UE 10, and includes an APN (access point name), bearer ID, PDN connection ID, TEID. (Tunnel Endpoint Identifier), terminal device identification information, ProSe Server identification information, base station identification information, service identification information, group identification information, and the like.
- the APN access point name
- the APN is identification information used for selecting the PGW 50 in the IP mobile communication network 5 and is identification information associated with the PDN 80.
- PDN 80 different for each service such as IMS or video distribution is configured, it can also be used as identification information for identifying the service.
- the bearer ID is information for identifying a radio bearer that is a radio communication path between the UE 10 and the UE-R 15 established when the UE 10 is connected to the UE-R 15. Moreover, when UE10 connects to eNB20, the information which identifies the radio
- the PDN connection ID is information for identifying a PDN connection that is a logical path established between the UE 10 and the PGW 50.
- the TEID is identification information of a tunnel communication path for delivering user data constituting a PDN connection, and is identification information of a tunnel communication path established based on the GTP protocol, the Mobile IP protocol, and the Proxy Mobile IP protocol. It's okay.
- the terminal device identification information may be information for identifying the UE-R 15. Further, the information for identifying the UE-R 15 may be subscriber identification information associated with the UE-R 15 such as IMSI (International Mobile Subscriber Identity) or an IP address assigned to the UE-R 15. Alternatively, information such as FQDN (FullyNQualified Domain Name) associated with the UE-R 15 may be used. Further, a plurality of these may be stored.
- IMSI International Mobile Subscriber Identity
- FQDN FullNQualified Domain Name
- the ProSe Server identification information may be information for identifying the ProSe Server 90.
- the information identifying the ProSe Server 90 may be an IP address assigned to the ProSe Server 90, or may be information such as FQDN (Fully Qualified Domain Name) associated with the ProSe Server 90.
- the MME 30 may store the identification information of the terminal device and the identification information of the ProSe Server 90 in association with each other. This allows ProSe to manage terminal device services Server may be stored, and a terminal device provided by the ProSe Server may be stored.
- the base station identification information may be information for identifying the UE-R 15 or information for identifying the eNB 20.
- the base station identification information may be configured by combining a carrier identification code for identifying a mobile communication carrier that provides a communication service and a base station identification code. Thereby, it can be set as unique identification information in a plurality of mobile communication networks provided by a plurality of mobile communication carriers.
- the service identification information is information for identifying a service provided by the mobile communication carrier on the IP mobile communication network 5.
- the service identification information may be APN or service domain identification information such as FQDN (Fully Qualified Domain Name). Not limited to this, it may be identification information associated with a service. Further, the service may be a voice call service based on IMS, a video distribution service, or a service that provides group communication.
- the service identification information is identification information for identifying such a service.
- the group identification information may be information for identifying a group when two or more communication terminals form a group and perform communication between the groups. Further, when there are a plurality of contents to be delivered to the group, information for identifying these contents may be used.
- it may be information for identifying a terminal group when performing a broadcast call with a plurality of communication terminals.
- it may be information for identifying a session for a call.
- identification information that identifies a terminal that receives the video distribution as a group may be used, or identification information that identifies a distribution video when there are a plurality of videos It may be.
- the group identification information may be an IP multicast address or TMSI (Temporary Mobile Subscriber Identify) which is a temporary ID used for user authentication assigned by a communication carrier. It is not limited to this and may be information for identifying a group such as an email address.
- TMSI Temporal Mobile Subscriber Identify
- the MME communication channel context 442 may be held for each communication channel. For example, you may hold
- the base station information of the communication channel context for the direct communication channel may store information for identifying the UE-R 15 and information for identifying the eNB 20 to which the UE-R 15 is connected.
- information group described above may be stored as an information element of MM (Mobility Management) Context.
- the ProSe Server 90 is a server device that provides services such as establishment of a direct communication path and detection of neighboring terminals to the UE-R 15 and the UE 10.
- Fig. 9 shows the functional configuration of ProSe Server90.
- an IP mobile communication network interface unit 910 and a storage unit 940 are connected to the control unit 900 via a bus.
- the control unit 900 is a functional unit for controlling the ProSe Server 90.
- the control unit 900 implements various processes by reading and executing various programs stored in the storage unit 940.
- the IP mobile communication network interface unit 910 is a functional unit for the ProSe Server 90 to connect to the IP mobile communication network 5.
- the storage unit 940 is a functional unit that records programs, data, and the like necessary for various operations of the Prose Server 90.
- the storage unit 940 includes, for example, a semiconductor memory, an HDD (Hard Disk Drive), or the like.
- the storage unit 940 stores a ProSe Server communication path context 942.
- the ProSe Server communication path context 942 is an information group stored in association with the direct communication path established between the UE-R 15 and the UE 10, and includes an APN (access point name), a bearer ID, a PDN connection ID, It may include TEID (Tunnel Endpoint Identifier), base station identification information, service identification information, group identification information, and the like.
- APN access point name
- bearer ID a bearer ID
- PDN connection ID It may include TEID (Tunnel Endpoint Identifier), base station identification information, service identification information, group identification information, and the like.
- the APN access point name
- the APN is identification information used for selecting the PGW 50 in the IP mobile communication network 5 and is identification information associated with the PDN 80.
- PDN 80 different for each service such as IMS or video distribution is configured, it can also be used as identification information for identifying the service.
- the bearer ID is information for identifying a radio bearer that is a radio communication path between the UE 10 and the UE-R 15 established when the UE 10 is connected to the UE-R 15. Moreover, when UE10 connects to eNB20, the information which identifies the radio
- the PDN connection ID is information for identifying a PDN connection that is a logical path established between the UE 10 and the PGW 50.
- the TEID is identification information of a tunnel communication path for delivering user data constituting a PDN connection, and is identification information of a tunnel communication path established based on the GTP protocol, the Mobile IP protocol, and the Proxy Mobile IP protocol. It's okay.
- the base station identification information may be information for identifying the UE-R 15 or information for identifying the eNB 20.
- the base station identification information may be configured by combining a carrier identification code for identifying a mobile communication carrier that provides a communication service and a base station identification code. Thereby, it can be set as unique identification information in a plurality of mobile communication networks provided by a plurality of mobile communication carriers.
- the service identification information is information for identifying a service provided by the mobile communication carrier on the IP mobile communication network 5.
- the service identification information may be APN or service domain identification information such as FQDN (Fully Qualified Domain Name). Not limited to this, it may be identification information associated with a service. Further, the service may be a voice call service based on IMS, a video distribution service, or a service that provides group communication.
- the service identification information is identification information for identifying such a service.
- the group identification information may be information for identifying a group when two or more communication terminals form a group and perform communication between the groups. Further, when there are a plurality of contents to be delivered to the group, information for identifying these contents may be used.
- it may be information for identifying a terminal group when performing a broadcast call with a plurality of communication terminals.
- it may be information for identifying a session for a call.
- identification information that identifies a terminal that receives the video distribution as a group may be used, or identification information that identifies a distribution video when there are a plurality of videos It may be.
- the group identification information may be an IP multicast address or TMSI (Temporary Mobile Subscriber Identify) which is a temporary ID used for user authentication assigned by a communication carrier. It is not limited to this and may be information for identifying a group such as an email address.
- TMSI Temporal Mobile Subscriber Identify
- the ProSe Server communication path context 942 may be held for each communication path. For example, you may hold
- the base station information of the communication channel context for the direct communication channel may store information for identifying the UE-R 15 and information for identifying the eNB 20 to which the UE-R 15 is connected.
- the ProSe Server 90 may hold the UE-R 15 identification information in the ProSe Server communication path context 942.
- the identification information of UE-R 15 may be subscriber identification information associated with UE-R 15 such as IMSI (International Mobile Subscriber Identity), or may be an IP address assigned to UE-R 15. Alternatively, information such as FQDN (FullyNQualified Domain Name) associated with the UE-R 15 may be used.
- the ProSe Server communication path context 942 may store information for identifying the location management device.
- the information for identifying the location management device may be an IP address assigned to the location management device, or information such as FQDN (FullyFullQualified Domain Name) associated with the location management device. Good. Also, it may be a globally unique GMMEI (Globally Unique MME Identifier), or a GUTI composed of GUTI and TMSI (Temporary Mobile Subscriber Identity) which is a temporary ID used for user authentication assigned by the operator. (Global
- Identity) may be sufficient.
- the ProSe Server 90 may store the identification information of the terminal and the identification information of the location management device in association with each other.
- the location management device may manage the location of the terminal device.
- the ProSe Server 90 may manage permission information for authenticating that the UE 10 or the UE-R 15 can switch between the GO mode and the decentralized mode.
- the ProSe Server 90 may manage permission information indicating only that the GO mode and the decentralized mode can be switched (permitted).
- ProSe Server 90 is permitted information indicating that the GO mode and the decentralized mode can be switched (permitted) and that the GO mode and the decentralized mode cannot be switched (not permitted). You may manage.
- FIG. 10 shows the main processing flow in the first embodiment.
- the UE-R 15 performs a network connection procedure and a service registration procedure (S1002).
- the UE-R 15 and the UE 10 (UE 10a or UE 10b) perform a communication path establishment procedure in the GO mode (S1004).
- UE10 (UE10a and UE10b) and UE-R15 start transmission / reception of the data in the communication channel in GO mode.
- the UE 10 and the UE-R 15 perform a procedure for switching to the communication path in the decentralized mode during transmission / reception of data in the communication path in the GO mode (S1006).
- the procedure for switching to the decentralized mode is performed by the decentralized mode communication channel establishment procedure and the GO mode communication channel deletion procedure.
- FIG. 11 shows a service registration procedure in the UE 10a or the UE 10b.
- the UE 10a performs a service registration procedure with the ProSe application server.
- the UE 10a may be another application 2 or the application 3 regardless of the application 1.
- the UE 10a transmits an authentication request to the ProSe application server (S1102).
- the UE 10a includes user identification information in the authentication request.
- the user identification information information stored in the UE 10a may be used, or may be directly input to the UE 10a.
- the UE 10a may include an authentication key (password) for authenticating the user together with the user identification information.
- An authentication key stored in advance in the UE 10a may be used, or may be directly input into the UE 10a.
- the UE 10a transmits an authentication request to the ProSe application server in advance when the UE 10a is in the area of the eNB 20, but when the communication path in the GO mode is established or when the communication path is switched to the GO mode.
- the authentication request may be transmitted to the ProSe application server.
- the UE 10a may transmit to the ProSe application server via a cable such as a wired LAN.
- the ProSe application server receives the authentication request from the UE 10a, confirms that the user identification information included in the authentication request is valid, and performs authentication.
- the ProSe application server may check whether the authentication key corresponding to the user identification information is valid.
- the ProSe application server extracts information about the group from the user identification information.
- the user can register with the group in advance, and can send and receive data only within the group.
- Information about the group includes a group identifier such as a group ID and an IP multicast address.
- user identification information belonging to a group may be extracted as information about the group.
- the ProSe application server may transmit the authentication information to the ProSe Server 90 when receiving the authentication request from the UE 10a.
- the ProSe Server 90 that has received the authentication information from the ProSe application server may confirm the authentication information and authenticate the UE 10a.
- the ProSeServer 90 may authenticate that the UE 10a can switch between the GO mode and the decentralized mode.
- the ProSeServer 90 may transmit an authentication response or the like as a response to the authentication information from the ProSe application server after performing authentication using the authentication information of the UE 10a.
- the ProSe Server 90 may include permission information indicating that switching between the GO mode and the decentralized mode can be performed in the response to the authentication information from the ProSe application server.
- the ProSe Server 90 may include permission information indicating that switching between the GO mode and the decentralized mode cannot be performed in the response to the authentication information from the ProSe application server. Furthermore, ProSe Server 90 does not include permission information indicating that switching between the GO mode and the decentralized mode is included in the response to the authentication information from the ProSe application server, thereby switching between the GO mode and the decentralized mode. It may indicate that it cannot be done.
- the ProSe application server After performing the authentication, the ProSe application server transmits an authentication response to the UE 10a (S1104).
- the ProSe application server includes information on the group in the authentication response.
- Information relating to the group may include a group identifier such as a group ID or an IP multicast address.
- you may include the identification information of the user who belongs to a group as information regarding a group.
- the ProSe application server may include permission information indicating that switching between the GO mode and the decentralized mode notified from the ProSe Server 90 can be performed.
- the ProSe application server may include permission information indicating that switching between the GO mode and the decentralized mode notified from the ProSe Server 90 cannot be performed.
- the ProSe application server can switch between the GO mode and the decentralized mode by not including the permission information indicating that the GO mode and the decentralized mode notified from the ProSe Server 90 can be switched. You may show that you can't.
- the UE 10a receives the authentication response from the ProSe application server, and receives information about the group included in the authentication response. Further, the UE 10a receives permission information indicating that the GO mode and the decentralized mode can be switched included in the authentication response, and manages the permission information indicating that the GO mode and the decentralized mode can be switched. You may do it. Further, the UE 10a receives permission information indicating that the GO mode and the decentralized mode included in the authentication response cannot be switched, and permission information indicating that the GO mode and the decentralized mode cannot be switched. You may manage. Furthermore, if the UE 10a does not receive permission information indicating that the GO mode and the decentralized mode included in the authentication response can be switched, the UE 10a indicates that the GO mode and the decentralized mode cannot be switched. You may manage permission information.
- the UE 10a receives authentication from the ProSe application server and can transmit and receive data in the application 1.
- the UE 10a may send an authentication request to the ProSe Server 90 instead of sending an authentication request to the ProSe application server.
- the ProSe Server 90 may authenticate the UE 10a based on the authentication information included in the authentication request. Further, the ProSe Server 90 may authenticate that the UE 10a can switch between the GO mode and the decentralized mode.
- the ProSe Server 90 that has received the authentication request may send the authentication information to the ProSe application server.
- the ProSe application server that has received the authentication information from the ProSe Server 90 may confirm the authentication information, authenticate with the authentication information of the UE 10a, and then send an authentication response as a response to the authentication information from the ProSe Server 90.
- the ProSe application server may include permission information indicating that switching between the GO mode and the decentralized mode can be performed in the response to the authentication information from the ProSe Server 90.
- the ProSe Server 90 that has received the authentication request from the UE 10a may transmit an authentication response to the UE 10a.
- the ProSe Server 90 may include permission information indicating that the GO mode and the decentralized mode can be switched. good. Further, when the ProSeServer 90 authenticates that the UE 10a cannot switch between the GO mode and the decentralized mode, the ProSeServer 90 may include permission information indicating that the GO mode and the decentralized mode cannot be switched. good.
- the ProSeServer 90 authenticates that the UE 10a cannot switch between the GO mode and the decentralized mode
- the ProSeServer 90 does not include permission information indicating that the GO mode and the decentralized mode can be switched. Thus, it may be indicated that the GO mode and the decentralized mode cannot be switched.
- the UE 10a receives an authentication response from ProSe Server 90.
- the UE 10a may receive permission information indicating that it is possible to switch between the GO mode and the decentralized mode included in the authentication response, and may manage permission information for switching between the GO mode and the decentralized mode.
- the UE 10a receives permission information indicating that the switching between the GO mode and the decentralized mode cannot be performed from the ProSeServer 90, the permission information indicating that the switching between the GO mode and the decentralized mode cannot be performed. You may manage.
- the UE 10a determines that the GO mode and the decentralized mode cannot be switched,
- the permission information indicating that the decentralization mode cannot be switched may be managed.
- UE 10b transmits an authentication request to the ProSe application server (S1102), and the ProSe application server transmits an authentication response to UE 10b after authentication of UE 10b (S1104).
- the UE 10b may send an authentication request to the ProSe Server 90 instead of sending an authentication request to the ProSe application server.
- the ProSe Server 90 may authenticate the UE 10b with the authentication information included in the authentication request. Further, it may be authenticated that the GO mode and the decentralized mode can be switched.
- the ProSe Server 90 that has received the authentication request may send the authentication information to the ProSe application server.
- the ProSe application server that has received the authentication information from the ProSe Server 90 may check the authentication information, authenticate with the authentication information of the UE 10b, and then send an authentication response as a response to the authentication information from the ProSe Server 90.
- the ProSe application server may include permission information indicating that switching between the GO mode and the decentralized mode can be performed in the response to the authentication information from the ProSe Server 90.
- the ProSe Server 90 that has received the authentication request from the UE 10b may transmit an authentication response to the UE 10b.
- the ProSeServer 90 may include permission information indicating that the GO mode and the decentralized mode can be switched. . Further, when the ProSeServer 90 authenticates that the UE 10b cannot switch between the GO mode and the decentralized mode, the ProSeServer 90 may include permission information indicating that the GO mode and the decentralized mode cannot be switched. good. Here, if the ProSeServer 90 authenticates that the UE 10b cannot switch between the GO mode and the decentralized mode, the ProSeServer 90 does not include permission information indicating that the GO mode and the decentralized mode can be switched. Thus, it may be indicated that the GO mode and the decentralized mode cannot be switched.
- the UE 10b receives an authentication response from ProSe Server 90.
- the UE 10b may receive permission information indicating that it is possible to switch between the GO mode and the decentralized mode included in the authentication response, and may manage permission information for switching between the GO mode and the decentralized mode.
- the UE 10b receives permission information indicating that switching between the GO mode and the decentralized mode cannot be performed from the ProSe Server 90, the permission indicating that the switching between the GO mode and the decentralized mode cannot be performed. Information may be managed.
- the UE 10b determines that the GO mode and the decentralized mode cannot be switched.
- the permission information indicating that the decentralization mode cannot be switched may be managed.
- the UE 10b can receive data from the ProSe application server and transmit / receive data in the application 1.
- each of the UE 10a and the UE 10b can be authenticated by the ProSe application server and can transmit and receive data in the application 1.
- FIG. 12 shows a network registration procedure and a service registration procedure in the UE-R 15.
- the UE-R 15 transmits an attach request to the MME 30 (S1202).
- the UE-R 15 may include a relay activation indication in the attach request.
- the relay activation indication is information indicating that the UE-R 15 activates the relay.
- the MME 30 that has received the attach request from the UE-R 15 authenticates the UE-R 15.
- the MME 30 detects that the UE-R 15 requests to activate the relay.
- the relay request indication is not included in the attach request, it may be detected that the UE-R 15 requests that the relay is activated by the APN included in the attach request.
- the UE-R 15 may be authenticated by the same method as a normal UE.
- the MME 30 may transmit an authentication request to the ProSe Server 90 (S1204).
- the MME 30 includes information on the UE-R 15 in the authentication request.
- the information on the UE-R 15 is information indicating the identification information of the UE-R 15 and that the UE-R 15 activates the relay.
- the ProSe Server 90 that has received the authentication request from the MME 30 authenticates the provision of the ProSe service in the UE-R 15 by using information on the UE-R included in the authentication request.
- the ProSe service means that another UE detects a neighbor, and when the UE is in the vicinity, directly transmits and receives data between the UEs without going through the eNB 20 and the core network 7.
- a ProSe UE ID corresponding to the UE-R 15 may be generated.
- the ProSe Server 90 that has authenticated the UE-R 15 transmits an authentication response to the MME 30 (S1206).
- the generated ProSe UE ID is included in the authentication response.
- the MME 30 receives the authentication response from the ProSe Server 90 and receives the ProSe UE ID included in the authentication response.
- the MME 30 transmits an authentication request to the ProSe Server 90 (S1204), and the ProSe Server 90 does not need to transmit an authentication response to the MME 30 (S1206).
- the MME 30 If the MME 30 and the ProSe Server 90 are configured with the same device, the MME 30 generates a ProSe UE ID together with the authentication of the UE-R 15.
- MME 30 selects SGW 40 / PGW 50 after authentication of UE-R 15. Note that the SGW 40 / PGW 50 may be selected using an APN when the APN is included in the attach request. When the APN is not included in the attach request, the MME 30 may arbitrarily select it.
- the MME 30 may acquire the PDN address using the APN.
- the PDN address is an IP address assigned to the UE-R 15. Note that if the APN is not included in the attach request, the MME 30 may arbitrarily determine.
- the PDN address is not an IP address for a single UE-R 15 but a plurality of IP addresses that can be assigned to a plurality of UEs. You may get Here, instead of a plurality of IP addresses, an address block to which a plurality of IP addresses can be allocated may be allocated. For example, only the network part in the IP address may be acquired as the address block.
- the APN is not included in the attach request, it may be detected that the PDN address for the relay is acquired by the relay activation indication.
- the PDN address for the relay is acquired.
- the MME 30 transmits a session generation request to the SGW 40 (S1208).
- the session generation request may include a relay activation indication.
- the relay activation indication can request establishment of a communication path for the relay. In addition, even if it is a relay, when it is the same as the communication path which the conventional UE establishes, it is not necessary to include relay activation indication.
- the SGW 40 that has received the session generation request from the MME 30 transmits the session generation request to the PGW 50.
- the SGW 40 includes the relay activation indication in the session generation request.
- SGW40 can request
- the PGW 50 that has received the session generation request from the SGW 40 establishes a communication path between the SGW 40 and the PGW 50. At this time, if relay activation indication is included in the session generation request, a communication path for relay may be secured. Subsequently, the PGW 50 transmits a session generation response to the SGW 40. At this time, control information for managing the communication path may be included.
- the SGW 40 establishes a communication path between the eNB 20 and the SGW 40. At this time, if relay activation indication is included in the session generation request, a communication path for relay may be secured. Subsequently, the SGW 40 transmits a session generation response to the MME 30 (S1210). At this time, control information for managing the communication path may be included.
- the MME 30 transmits a context setting request / attach response to the UE-R 15 (S1212).
- the context setting request / attach response may include information such as a PDN address.
- the UE-R 15 may generate a TFT when receiving an attach response from the MME 30.
- the TFT is transmission destination setting information defined for each application, and the UE 10a determines the transmission destination using the TFT when data transmission occurs in a certain application.
- the bearer ID is included in the attach response, the TFT and the bearer ID may be managed in association with each other and used to determine the data transmission destination.
- information related to communication quality may be set in association with each other, and data may be transmitted according to the communication quality.
- the UE-R 15 may reserve information such as a PDN address for establishing a communication path in the GO mode for the UE 10a and the UE 10b to be connected, and later notify the UE 10a and the UE 10b. .
- the UE-R 15 can transmit and receive data via the eNB 20 and the SGW 40 / PGW 50.
- the UE-R 15 transmits an authentication request for requesting an authentication for relaying in ProSe by the application 1 to the ProSe application server (S1214), and the ProSe application server authenticates the UE-R 15 and then authenticates the UE-
- An authentication response may be transmitted to R15 (S1216). Since this authentication request is the same as that transmitted by the UE 10a in the ProSe application registration procedure in the UE, a description thereof will be omitted.
- An authentication response that is a response to this is the same as that transmitted by the ProSe application server in the registration procedure of the ProSe application in the UE, and thus description thereof is omitted.
- the authentication request may be transmitted when the UE-R 15 does not only have a function as a relay but performs data transmission / reception in the application 1. That is, if the UE-R 15 only supports the function as a relay, the authentication request need not be transmitted.
- the UE 10a receives authentication from the ProSe application server and can transmit and receive data in the application 1.
- the UE-R 15 transmits group information indicating that GO mode is possible (S1218).
- the UE 10a and the UE 10b can detect the group capable of the GO mode in the UE-R 15 by receiving the group information capable of the GO mode from the UE-R 15.
- the GO mode in group 1 can be used.
- FIG. 13 shows a communication path establishment procedure in the GO mode.
- the UE 10a transmits an attach request to the UE-R 15 (S1304).
- the attach request transmitted here may include information for identifying the group in addition to the request transmitted from the conventional UE to the eNB 20 or the MME 30.
- the information for identifying the group is an identifier for identifying a group in which the UE 10a can participate and perform data transmission / reception, and is, for example, group 1 or group 2.
- information for identifying the group 1 corresponding to the communication path established in the GO mode is included.
- the attach request may include information such as APN and attach type. Further, the attach request may be transmitted by a method in which security is ensured.
- the UE 10a may perform proximity detection in order to detect whether it can be transmitted to the UE-R 15.
- the proximity detection refers to detecting that the UE-R 15 is present in the vicinity so that the UE-R 15 can directly communicate.
- the UE 10a may transmit a proximity detection signal by broadcast, and the UE-R 15 may respond by including the identification information of the UE-R 15 to detect that the UE-R 15 exists in the vicinity. .
- the UE 10a may request the core network 7 or the ProSeServer 90 for proximity detection.
- the UE 10a or UE-R 15 notifies the location information to the core network 7 or ProSeServer 90 in advance, and the core network 7 or ProSeServer 90 compares the location information of the UE 10a with the location information of the UE-R 15 in response to the inquiry of the UE 10a. If it is a neighbor, the neighbor may be detected by notifying the UE 10a that it is a neighbor with the UE-R 15.
- the UE 10a performs proximity detection for the UE-R 15, but the UE 10a can detect the UE 10b by using the identification information of the UE 10b instead of the identification information of the UE-R 15.
- the UE 10a detects the proximity of the UE 10b and the UE-R 15
- the UE 10b can be similarly used as a method of detecting the proximity of the UE 10a and the UE-R 15.
- the UE-R 15 can be similarly used as a method for detecting the proximity of the UE 10a and the UE 10b.
- the UE-R 15 transmits an attach request to the MME 30 (S1306).
- the attach request includes a relay connection indication.
- the relay connection indication is information indicating that a UE such as the UE 10a or the UE 10b is connected to the UE-R 15.
- the information indicating that the UE is connected to the UE-R 15 is the relay connection indication, but any information element may be used as long as the information indicates that the UE is connected to the UE-R 15. good.
- an information element for identifying a connected UE may be included.
- the MME 30 receives the attach request from the UE-R 15.
- the MME 30 may receive the attach request and perform processing for generating a PDN address (IP address of the UE 10a) and a PDP context parameter.
- the MME 30 detects that the UE 10a is connected to the UE-R 15 based on the relay connection indication included in the attach request from the UE-R 15.
- the MME 30 may transmit an authentication request to the ProSe Server 90 (S1308).
- the MME 30 may include the UE identifier of the UE 10a connected to the UE-R 15 in the authentication request.
- the ProSe Server 90 receives an authentication request from the MME 30.
- the ProSe Server 90 that has received the authentication request may authenticate that the UE 10a performs ProSe, or may authenticate that the UE 10a connects to the core network via the UE-R 15.
- the ProSe Server 90 authenticates that the UE 10a performs ProSe, or authenticates the connection to the core network via the UE-R 15, the ProSe Server 90 identifies the UE 10a that can be used for proximity detection in ProSe or direct communication path establishment. ProSe UE ID may be extracted.
- the ProSe Server 90 transmits an authentication response to the MME 30 (S1310), and the MME 30 receives the authentication response from the ProSe Server 90.
- the ProSe Server 90 may notify the MME 30 of the ProSe UE ID.
- the MME 30 receives the authentication response from the ProSe Server 90, and detects that the UE 10a is connected to the UE-R 15.
- MME30 may perform the process for producing
- the MME 30 transmits a session establishment request to the SGW 40 / PGW 50 (S1312).
- the connection establishment indication includes the relay connection indication. By including the relay connection indication, it may indicate to the SGW 40 / PGW 50 that the UE 10a establishes a communication path that ensures communication quality for transmitting and receiving data via the UE-R 15.
- the SGW 40 / PGW 50 receives a session establishment request from the MME 30.
- the ProSe Server 90 detects that the UE 10a is connected to the core network via the UE-R 15 based on the relay connection indication included in the session establishment request. Thereby, the SGW 40 / PGW 50 may establish a communication path that ensures communication quality in order for the UE 10a to transmit and receive data via the UE-R 15.
- the SGW 40 / PGW 50 transmits a session establishment response to the MME 30 (S1314), and the MME 30 receives the session establishment response from the SGW 40 / PGW 50.
- the MME 30 confirms that the UE 10a establishes a communication path for transmitting and receiving data by connecting to the UE-R 15 between the PGW 50 and the SGW 30, between the SGW 30 and the eNB 20, and between the eNB 20 and the UE-R 15.
- the MME 30 transmits an attach response to the UE-R 15 (S1316), and the UE-R 15 receives the attach response from the MME 30.
- the UE-R 15 has secured a communication path in which the UE 10a can transmit and receive data via the UE-R 15 in the core-network communication path with the UE-R 15.
- the UE-R 15 may generate a TFT when receiving an attach response from the MME 30.
- the TFT and the bearer ID may be managed in association with each other and used to determine the data transmission destination.
- information related to communication quality may be set in association with each other, and data may be transmitted according to the communication quality.
- the UE-R 15 transmits an attach request to the MME 30 and obtains authentication for the UE 10a. If the UE-R 15 is authenticated in advance for enabling the relay function, the UE-R 15 performs authentication for the UE 10a. It does not have to be done. That is, the UE-R 15 does not need to transmit an attach request to the MME 30 (S1306). If the UE-R 15 does not send an attach request to the MME 30, the MME 30 sends an authentication request to the ProSe Server 90 (S1308), the ProSe Server 90 sends an authentication response to the MME 30 (S1310), and the MME 30 sends to the SGW 40 / PGW 50. The session establishment request is transmitted (S1312), the SGW 40 / PGW 50 transmits the session establishment response to the MME 30 (S1314), and the MME 30 does not need to transmit the attach response to the UE-R 15 (S1316).
- the UE-R 15 transmits an attach response to the UE 10a (S1318), and the UE 10a receives the attach response from the UE-R 15.
- the UE-R 15 may receive information such as an APN, a PDN address, a bearer ID, and a PDP context parameter by an attach response from the MME 30, and notify the UE 10a together with the attach response.
- the UE-R 15 may receive information such as an APN, a PDN address, a bearer ID, and a PDP context parameter in advance in a network registration procedure or a service registration procedure in a relay and notify the UE 10a together with an attach response.
- information such as an APN, a PDN address, a bearer ID, and a PDP context parameter in advance in a network registration procedure or a service registration procedure in a relay and notify the UE 10a together with an attach response.
- the UE 10a may generate a TFT when receiving an attach response from the UE-R 15.
- the TFT and the bearer ID may be managed in association with each other and used to determine the data transmission destination.
- information related to communication quality may be set in association with each other, and data may be transmitted according to the communication quality.
- a TFT may not be generated, and data in all applications may be transmitted to the established communication path.
- the UE 10a can establish a communication path in the GO mode.
- the UE 10b transmits an attach request to the UE-R 15 (S1320), the UE-R 15 transmits an attach request to the MME 30 (S1322), the MME 30 transmits an authentication request to the ProSe Server 90 (S1324), and the ProSe Server 90
- An authentication response is sent to the MME 30 (S1326), the MME 30 sends a session establishment request to the SGW 40 / PGW 50 (S 1328), the SGW 40 / PGW 50 sends a session establishment response to the MME 30 (S 1330), and the MME 30 attaches to the UE-R 15 A response is transmitted (S1332), and UE-R15 transmits an attach response to UE 10b (S1334).
- the UE-R 15 does not need to authenticate the UE 10b if the UE-R 15 is previously authenticated for enabling the relay function. That is, the UE-R 15 sends an attach request to the MME 30 (S1322), the MME 30 sends an authentication request to the ProSe Server 90 (S1324), the ProSe Server 90 sends an authentication response to the MME 30 (S1326), and the MME 30 sends the SGW 40 / A session establishment request is transmitted to the PGW 50 (S1328), the SGW 40 / PGW 50 transmits a session establishment response to the MME 30 (S1330), and the MME 30 does not need to transmit an attach response to the UE-R 15 (S1332).
- the UE 10b can establish a communication path in the GO mode.
- the UE 10a, the UE 10b, and the UE-R 15 can establish a communication path in the GO mode and transmit / receive data.
- FIG. 14 shows an example of TFTs in the UE 10a, UE 10b, and UE-R 15 when a communication path in the GO mode is established.
- FIG. 14 shows an example of the TFT in the application 1. Here, only the example in the application 1 is shown, but the application 2 and the application 3 may be managed in the TFT.
- bearer ID 1a is a bearer ID indicating a communication path in the GO mode established by UE 10a with UE-R 15.
- the UE 10a can transmit and receive data in the application 1 on the communication path in the GO mode by managing the TFT.
- the UE 10a transmits to the UE-R 15, the UE-R 15 transmits data received from the UE 10a to the eNB 20, and the eNB 20 transmits data received from the UE-R 15 to the SGW 40.
- the SGW 40 transmits the data received from the eNB 20 to the PGW 50, and the PGW 50 transmits the data received from the SGW 40 to the PDN 80.
- a process for detecting a route to the UE 10b (routing process) is performed, and data is transmitted to the PGW 50 again.
- the PGW 50 transmits the data received from the PDN 80 to the SGW 40
- the SGW 40 transmits the data received from the PGW 50 to the eNB 20
- the eNB 20 transmits the data received from the SGW 40 to the UE-R 15, and the UE-R 15 receives the data received from the eNB 20.
- the application 1 is managed in association with the bearer ID 1b.
- the bearer ID 1b is a bearer ID indicating a communication path established by the UE 10b with the UE-R 15, and indicates that when data is transmitted in the application 1, the UE 10b transmits to the UE-R 15.
- the UE 10b can transmit and receive data in the application 1 on the communication path in the GO mode by managing the TFT.
- UE 10b transmits to UE-R 15, UE-R 15 transmits data received from UE 10b to eNB 20, and eNB 20 transmits data received from UE-R 15 to SGW 40.
- the SGW 40 transmits the data received from the eNB 20 to the PGW 50, and the PGW 50 transmits the data received from the SGW 40 to the PDN 80.
- a process for detecting a route to the UE 10a (routing process) is performed, and data is transmitted to the PGW 50 again.
- the PGW 50 transmits the data received from the PDN 80 to the SGW 40
- the SGW 40 transmits the data received from the PGW 50 to the eNB 20
- the eNB 20 transmits the data received from the SGW 40 to the UE-R 15, and the UE-R 15 receives the data received from the eNB 20.
- the bearer ID 1ra is a bearer ID indicating a communication path established by the UE-R 15 with the UE 10a, and indicates that when the application 1 transmits data, the UE-R 15 transmits to the UE 10a.
- the bearer ID 1rb is a bearer ID indicating a communication path established by the UE-R 15 with the UE 10b.
- the UE-R 15 transmits to the UE 10b.
- the UE-R 15 can transmit and receive data in the application 1 on the communication path in the GO mode by managing the TFT. That is, the UE-R 15 transmits data to the UE 10a and the UE 10b when transmitting and receiving data in the application 1.
- FIG. 15 shows a procedure for switching to the decentralized mode. Note that switching to the decentralized mode is performed during transmission / reception of data on the communication path in the GO mode.
- the UE-R 15 determines to switch to the decentralized mode (S1502).
- the decision to switch to the decentralized mode may be made, for example, by detecting that a group member exists in the vicinity. That is, switching may be determined by detecting that the UE 10a and the UE 10b exist in the vicinity.
- switching to the decentralized mode may be determined by detecting that the UE-R 15 is out of the range of the eNB 20 and cannot connect to the core network.
- FIG. 16 shows an example of a communication path establishment procedure including a request for switching to the decentralized mode. Note that this procedure is not necessary as long as the communication path establishment procedure includes a request for switching to the decentralized mode.
- the UE-R 15 transmits a communication alert directly to the UE 10a (S1602).
- the direct communication alert includes a switch indicator indicating a request for switching to the decentralized mode.
- the indicator may not be a switch indicator as long as it is an indicator indicating a request for switching to the decentralized mode.
- the switch indicator is included in the direct communication alert, but other messages may be used instead of the direct communication alert.
- switching to the decentralized mode communication path is indicated by including the switch indicator in one message for establishing the decentralized mode communication path, but the decentralized mode communication path establishment procedure is shown.
- the UE-R 15 may transmit a request for switching to the decentralized mode to the UE 10a to notify the UE 10a of switching to the communication path in the decentralized mode.
- the UE-R 15 may include the UE identifier in the direct communication alert.
- the UE-R 15 can indicate and switch data related to the UE identifier in the GO mode communication path, which is a switching source.
- the UE-R 15 can indicate transmission / reception of data with the UE 10b to the UE 10a and switch transmission / reception of data with the UE 10b.
- the UE identifier is included in the direct communication alert, other messages may be used instead of the direct communication alert.
- the UE-R 15 may include the APN in the direct communication alert.
- the UE-R 15 indicates data transmission / reception in the GO mode communication path in the APN, and can switch the GO mode communication path corresponding to the APN.
- the APN is included in the direct communication alert, but other messages may be used instead of the direct communication alert.
- the UE-R 15 may include the PDN connection identifier in the direct communication alert.
- the UE-R 15 indicates data transmission / reception in the GO mode communication path corresponding to the PDN connection identifier, and can switch the GO mode communication path corresponding to the PDN connection identifier.
- the PDN connection identifier is included in the direct communication alert, but other messages may be used instead of the direct communication alert.
- all data transmitted / received through the GO mode communication path may be detected as switching to the decentralized mode communication path.
- the UE 10a receives a communication alert directly from the UE-R 15.
- the UE 10a detects switching from the communication path in the GO mode to the communication path in the decentralized mode by using the switch indicator included in the direct communication alert.
- the UE identifier when the UE identifier is included, it is detected that the transmission / reception of GO mode data corresponding to the UE identifier is switched. If an APN is included, it is detected that the transmission / reception of GO mode data corresponding to the APN is switched. When the PDN connection identifier is included, it is detected that the transmission / reception of GO mode data corresponding to the PDN connection identifier is switched.
- the UE 10a that has detected switching to the decentralized mode communication path transmits a communication alert response directly to the UE-R 15 (S1604), and the UE-R 15 receives the communication alert response directly from the UE 10a. Based on this response, the UE-R 15 detects that the UE 10a has detected switching to the decentralized mode communication path.
- the UE-R 15 transmits a direct communication request to establish a decentralized mode communication path with the UE 10a (S1606).
- the direct communication request includes the direct communication ID indicating the communication path in the decentralized mode and the IP address of the UE-R 15 for transmitting and receiving data in the decentralized mode.
- the UE 10a receives the direct communication request from the UE-R 15, and manages the direct communication ID and the IP address of the UE-R 15 included in the direct communication request.
- the UE 10a performs a security procedure for data transmission / reception with the UE-R 15 (S1608).
- the security procedure is to prevent data transmission / reception between the UE 10a and the UE-R 15 from being intercepted by another UE or UE-R.
- a security key can be exchanged between the UE 10a and the UE-R 15 to prevent communication interception.
- the UE-R 15 transmits the public key R to the UE 10a, and the UE-R 15 receives the public key R from the UE 10a. Further, the UE 10a transmits the public key A to the UE-R, and the UE-R 15 receives the public key A from the UE 10a.
- the transmitting side (UE-R15 or UE10a) encrypts the data using the public key and transmits the encrypted data
- the receiving side (UE10a or UE-R15) encrypts the data using the public key.
- the UE 10a may notify the UE-R 15 not only of the encryption key but also of the encryption method. Further, the UE-R 15 may notify the UE 10a not only of the encryption key but also of the encryption method.
- the UE 10a detects the completion of the security procedure and transmits a direct communication response (S1610), and the UE-R 15 receives the direct communication response from the UE 10a.
- the direct communication response includes the direct communication ID and the IP address of the UE 10a.
- the UE-R 15 receives the direct communication response and confirms that the direct communication path has been established in the UE 10a. Further, the UE-R 15 manages the direct communication ID and the IP address of the UE 10a in the decentralized mode communication path included in the direct communication response.
- the UE-R 15 and the UE 10a establish a radio bearer (S1612).
- the UE-R 15 notifies a communication resource for performing data transmission / reception on the communication path in the decentralized mode.
- Communication resources include, for example, information about frequency and information about time.
- the UE-R 15 notifies the UE 10a of switching to the decentralized mode communication path, and the UE-R 15 and the UE 10a can establish the decentralized mode communication path.
- the UE-R 15 performs a communication path establishment procedure including a request to switch to the decentralized mode communication path with the UE 10b.
- the communication path establishment procedure in which the UE-R 15 includes a request to switch to the decentralized mode with the UE 10b is the same as the communication path establishment procedure in which the UE-R 15 includes a request to switch to the UE 10a and the decentralized mode.
- UE-R 15 transmits a communication alert directly to UE 10b (S1614), UE 10b receives a communication alert directly from UE-R 15, UE 10b transmits a communication alert response directly to UE-R 15 (S1616), and UE ⁇ R15 receives a direct communication alert response from UE10b, UE-R15 transmits a direct communication request to UE10b (S1618), UE10b receives a direct communication request from UE-R15, and UE10b and UE-R15 perform security procedures.
- the UE 10b transmits a direct communication response to the UE-R 15 (S1622), the UE-R 15 receives the direct communication response from the UE 10b, and the UE-R 15 and the UE 10b establish a radio bearer (S1624).
- the UE-R 15 notifies the UE 10b of switching to the decentralized mode communication path, and the UE-R 15 and the UE 10a can establish the decentralized mode communication path.
- the UE 10a that has received the request to switch to the decentralized mode communication path establishes a decentralized mode communication path with the UE 10b.
- the UE 10a transmits a communication alert directly to the UE 10b (S1626), and the UE 10b receives the communication alert directly from the UE 10a.
- the UE 10b detects that the UE 10a has a request for direct communication, and the UE 10b transmits a direct communication alert response to the UE 10a (S1628).
- the UE 10a receives the communication alert response directly from the UE 10b and detects that the decentralized mode communication path can be established. Next, the UE 10a transmits a communication request directly to the UE 10b (S1630).
- the direct communication request includes the direct communication ID indicating the communication path in the decentralized mode and the IP address of the UE 10a for transmitting and receiving data in the decentralized mode.
- the UE 10b receives the direct communication request from the UE 10a, and manages the direct communication ID and the IP address of the UE 10a included in the direct communication request.
- the UE 10b and the UE 10a perform a security procedure (S1632). Since the security procedure can use the same method as the security procedure (S1608) performed by the UE-R 15 and the UE 10a, detailed description thereof is omitted.
- the UE 10a transmits the public key A to the UE 10b, and the UE 10b receives the public key A from the UE 10a.
- the UE 10b transmits the public key B to the UE 10a, and the UE 10a receives the public key B from the UE 10b.
- the UE 10a may notify the UE 10b of not only the public key but also the encryption method.
- the UE 10b may notify the UE 10a not only of the public key but also of the encryption method.
- the UE 10b detects the completion of the security procedure, and transmits a direct communication response to the UE 10a (S1634), and the UE 10a receives the direct communication response from the UE 10b.
- the direct communication response includes the direct communication ID and the IP address of the UE 10b.
- the UE 10a and the UE 10b establish a radio bearer (S1636).
- the UE 10a notifies the UE 10b of communication resources for transmitting and receiving data on the decentralized mode communication path.
- Communication resources include, for example, information about frequency and information about time.
- the UE 10a and the UE 10b can establish a decentralized mode communication path.
- the UE 10b that has received the request to switch to the decentralized mode communication path may perform a procedure for establishing a decentralized mode communication path with the UE 10a. Note that when the UE 10b detects that the decentralized mode communication path is established with the UE 10a by receiving the communication alert directly from the UE 10a, the UE 10b does not perform the decentralized mode communication path establishment procedure with the UE 10a. May be.
- the procedure for the UE 10b to establish a decentralized mode communication path with the UE 10a is the same as the procedure for the UE 10a to establish a decentralized mode communication path with the UE 10b.
- the UE 10b transmits a direct communication alert to the UE 10a (S1638), the UE 10a transmits a direct communication alert response to the UE 10b (S1640), the UE 10b transmits a direct communication request to the UE 10a (S1642), and the UE 10a and the UE 10b are security.
- the procedure is performed (S1644), the UE 10a directly transmits a communication response to the UE 10b (S1646), and the UE 10b and the UE 10a establish a radio bearer (S1648).
- the UE 10b and the UE 10a can establish a decentralized mode communication path.
- a decentralized mode communication path can be established between each of the UE-R 15, the UE 10 a, and the UE 10 b.
- the UE-R 15 detects the establishment of the decentralized mode communication path with the UE 10a, detects the establishment of the decentralized mode communication path with the UE 10b, and switches to the decentralized mode communication path (S1506).
- the UE-R 15 may switch only the data transmission / reception in the GO mode indicated by the UE identifier, the APN or the PDN connection identifier notified to the UE 10a or the UE 10b to the communication path in the decentralized mode.
- the UE 10a detects that the decentralized mode communication path has been established with the UE-R 15, detects that the decentralized mode communication path has been established with the UE 10b, and switches to the decentralized mode communication path (S1508). ).
- the UE 10a may switch only the data transmission / reception in the GO mode indicated by the UE identifier, the APN, or the PDN connection identifier notified from the UE-R 15 to the communication path in the decentralized mode.
- the UE 10b detects that the decentralized mode communication path is established with the UE-R 15, detects that the decentralized mode communication path is established with the UE 10a, and switches to the decentralized mode communication path (S1510). ).
- the UE 10b may switch only the data transmission / reception in the GO mode indicated by the UE identifier, the APN or the PDN connection identifier notified from the UE-R 15 to the communication path in the decentralized mode.
- the UE 10a and the UE 10b delete the communication path in the GO mode (S1512). If the communication path in the GO mode can be maintained, the communication path in the GO mode may be maintained, and the GO mode communication path deletion procedure may not be performed.
- FIG. 17 shows an example of the GO mode communication path deletion procedure. Note that this procedure may not be required as long as it is a GO mode communication path deletion procedure.
- the UE 10a transmits a detach request to the UE-R 15 (S1704).
- the detach request transmitted here may include information for identifying the group in addition to the request transmitted from the conventional UE to the eNB 20 or the MME 30.
- the UE-R 15 transmits a detach request to the MME 30 (S1706).
- the detach request includes a relay connection indication.
- the relay connection indication is information indicating that the UE such as the UE 10a or the UE 10b is disconnected from the UE-R 15.
- the information indicating that the UE is disconnected from the UE-R 15 is the relay connection indication.
- any information element may be used as long as the information indicates that the UE is disconnected from the UE-R 15. good.
- an information element for identifying the UE to be disconnected may be included.
- the MME 30 receives the detach request from the UE-R 15.
- the MME 30 may receive the detach request and perform processing for deleting the PDN address (the IP address of the UE 10a) and the PDP context parameter.
- the MME 30 detects that the UE 10a is disconnected by the UE-R 15 by the relay connection indication included in the detach request from the UE-R 15.
- the MME 30 may transmit an authentication request to the ProSe Server 90 (S1708).
- the MME 30 may include the UE identifier of the UE 10a connected to the UE-R 15 in the authentication request.
- the ProSe Server 90 receives an authentication request from the MME 30.
- the ProSe Server 90 that has received the authentication request may authenticate that the UE 10a performs ProSe, or may authenticate that the UE 10a connects to the core network via the UE-R 15.
- the ProSe Server 90 may extract the ProSe UE ID for identifying the UE 10a when authenticating that the UE 10a performs ProSe or authenticating the UE 10a connecting to the core network via the UE-R 15.
- the ProSe Server 90 transmits an authentication response to the MME 30 (S1710), and the MME 30 receives the authentication response from the ProSe Server 90.
- the ProSe Server 90 may notify the MME 30 of the ProSe UE ID.
- the MME 30 receives the authentication response from the ProSe Server 90, and detects that the UE 10a is disconnected from the UE-R 15.
- the MME 30 may perform processing for deleting the PDN address (IP address of the UE 10a) and the PDP context parameter.
- the MME 30 transmits a session deletion request to the SGW 40 / PGW 50 (S1712).
- the session deletion request includes the relay connection indication.
- the relay connection indication it may indicate to the SGW 40 / PGW 50 that the UE 10a establishes a communication path that ensures communication quality for transmitting and receiving data via the UE-R 15.
- the SGW40 / PGW50 receives the session deletion request from MME30.
- the ProSe Server 90 detects that the UE 10a disconnects the connection from the core network via the UE-R 15 by the relay connection indication included in the session deletion request. Thereby, the SGW 40 / PGW 50 may re-establish the communication path because the UE 10a does not transmit / receive data via the UE-R 15.
- the SGW 40 / PGW 50 transmits a session deletion response to the MME 30 (S1714), and the MME 30 receives the session establishment response from the SGW 40 / PGW 50. Thereby, the MME 30 confirms that the UE 10a deletes the communication path for transmitting and receiving data by connecting to the UE-R 15 between the PGW 50 and the SGW 30, between the SGW 30 and the eNB 20, and between the eNB 20 and the UE-R 15.
- the MME 30 transmits a detach response to the UE-R 15 (S1716), and the UE-R 15 receives the detach response from the MME 30.
- the UE-R 15 may delete the TFT for the communication path in the GO mode when receiving a detach response from the MME 30.
- the TFT associated with the bearer ID may be deleted.
- the UE-R 15 transmits a detach request to the MME 30 (S1706) and obtains authentication for the disconnection of the UE 10a.
- the UE-R 15 may not perform authentication for the UE 10a.
- the UE-R 15 does not need to transmit a detach request to the MME 30 (S1706).
- the MME 30 transmits an authentication request to the ProSe Server 90 (S1708), the ProSe Server 90 transmits an authentication response to the MME 30 (S1710), and the MME 30 transmits to the SGW 40 / PGW 50.
- a session deletion request is transmitted (S1712), the SGW 40 / PGW 50 transmits a session deletion response to the MME 30 (S1714), and the MME 30 does not need to transmit a detach response to the UE-R 15 (S1716).
- the UE-R 15 transmits a detach response to the UE 10a (S1718), and the UE 10a receives the detach response from the UE-R 15.
- the UE 10a may delete the TFT when receiving the detach response from the UE-R 15.
- the TFT associated with the bearer ID may be deleted.
- the UE 10a can delete the communication path in the GO mode.
- the UE 10b transmits a detach request to the UE-R 15 (S1720), the UE-R 15 transmits a detach request to the MME 30 (S 1722), the MME 30 transmits an authentication request to the ProSe Server 90 (S 1724), and the ProSe Server 90
- An authentication response is transmitted to the MME 30 (S1726), the MME 30 transmits a session deletion request to the SGW 40 / PGW 50 (S 1728), the SGW 40 / PGW 50 transmits a session deletion response to the MME 30 (S 1730), and the MME 30 detaches to the UE-R 15
- the response is transmitted (S1732), and the UE-R 15 transmits a detach response to the UE 10b.
- the UE-R 15 may not perform authentication for the UE 10b. That is, the UE-R 15 transmits a detach request to the MME 30 (S 1722), the MME 30 transmits an authentication request to the ProSe Server 90 (S 1724), the ProSe Server 90 transmits an authentication response to the MME 30 (S 1726), and the MME 30 transmits the SGW 40 / A session deletion request is transmitted to the PGW 50 (S1728), the SGW 40 / PGW 50 transmits a session deletion response to the MME 30 (S1730), and the MME 30 does not need to transmit a detach response to the UE-R 15 (S1732).
- the UE 10b can delete the communication path in the GO mode.
- the UE 10a, the UE 10b, and the UE-R 15 can delete the communication path in the GO mode.
- FIG. 18 shows an example of TFTs in the UE 10a, UE 10b, and UE-R 15 when a communication path in the decentralized mode is established.
- FIG. 18 shows an example of the TFT in the application 1. Here, only the example in the application 1 is shown, but the application 2 and the application 3 may be managed in the TFT.
- bearer ID 2a is a bearer ID indicating a communication path in the decentralized mode established by UE 10a with UE 10b and UE-R 15.
- the bearer ID 2a is managed in association with the direct communication ID 2ab with the UE 10b and the direct communication ID 2ar with the UE-R 15.
- the UE 10a transmits to the UE 10b and the UE-R 15.
- the UE 10a can transmit and receive data in the application 1 on the communication path in the decentralized mode by managing the TFT.
- the UE 10a transmits / receives data in the application 1, it transmits it to the UE 10b and the UE-R 15.
- bearer ID 2b is a bearer ID indicating a communication path in the decentralized mode established by UE 10b with UE 10a and UE-R 15.
- the bearer ID 2b is managed in association with the direct communication ID 2ba with the UE 10a and the direct communication ID 2br with the UE-R 15.
- the UE 10b can transmit and receive data in the application 1 on the communication path in the decentralized mode by managing the TFT.
- the UE 10b transmits / receives data in the application 1, it transmits it to the UE 10a and the UE-R 15.
- application 1 is managed in association with bearer ID 2r.
- the bearer ID 2r is a bearer ID indicating a communication path established by the UE-R 15 with the UE 10a and the UE 10b.
- the bearer ID 2r is managed in association with the direct communication ID 2ra with the UE 10a and the direct communication ID 2rb with the UE-R 15.
- the UE-R 15 When transmitting data in the application 1, it indicates that the UE-R 15 transmits to the UE 10a and the UE 10b. As described above, the UE-R 15 can transmit and receive data in the application 1 on the communication path in the decentralized mode by managing the TFT. That is, the UE-R 15 transmits data to the UE 10a and the UE 10b when transmitting and receiving data in the application 1.
- each of the UE 10a, UE 10b, and UE-R 15 can switch from data transmission / reception in the GO mode communication path to data transmission / reception in the decentralized mode communication path.
- switching to the decentralized mode communication path is performed by the communication path establishment procedure including the request for switching to the decentralized mode.
- the switching procedure may be performed.
- the configuration of the communication system can be used in the same manner as in the first embodiment, a detailed description is omitted.
- the configuration of each device in the communication system is the same as that of the first embodiment, and detailed description thereof is omitted.
- the UE 10a and the UE 10b perform the procedure for registering the ProSe application in advance, and the method thereof can be the same as that of the first embodiment, the description thereof is omitted.
- the UE-R 15 performs a network connection procedure and a service registration procedure in advance, and a method similar to that of the first embodiment can be used as the method.
- the UE 10a and the UE 10b can use the same method as that of the first embodiment in establishing the communication path in the GO mode, detailed description thereof is omitted.
- FIG. 19 shows a procedure for switching to the decentralized mode in the first modification.
- the UE-R 15 determines to switch to the decentralized mode (S1902).
- the decision to switch to the decentralized mode may be made, for example, by detecting that a group member exists in the vicinity. That is, switching may be determined by detecting that the UE 10a and the UE 10b exist in the vicinity. Further, the decision to switch to the decentralized mode may be made by detecting that the UE-R 15 is out of the range of the eNB 20 and cannot connect to the core network.
- FIG. 20 shows an example of a communication path establishment procedure in the decentralized mode. Note that this procedure does not have to be a procedure for establishing a communication path in the decentralized mode.
- the UE-R 15 transmits a communication alert directly to the UE 10a (S2002).
- the UE 10a receives the direct communication alert and confirms that it exists in the vicinity of the UE-R 15.
- the UE 10a transmits a communication alert response directly to the UE-R 15 (S2004), and the UE-R 15 receives the communication alert response directly from the UE 10a.
- the UE-R 15 detects that the UE 10a exists in the vicinity.
- the UE-R 15 transmits a direct communication request to the UE 10a in order to establish a decentralized mode communication path with the UE 10a (S2006).
- the direct communication request includes the direct communication ID indicating the communication path in the decentralized mode and the IP address of the UE-R 15 for transmitting and receiving data in the decentralized mode.
- an APN or PDN connection identifier may be included.
- the UE 10a receives the direct communication request from the UE-R 15, and manages the direct communication ID and the IP address of the UE-R 15 included in the direct communication request. Moreover, you may manage an APN and a PDN connection identifier.
- the UE 10a performs a security procedure for data transmission / reception with the UE-R 15 (S2008).
- the security procedure is to prevent data transmission / reception between the UE 10a and the UE-R 15 from being intercepted by another UE or UE-R.
- a security key can be exchanged between the UE 10a and the UE-R 15 to prevent communication interception. Since the method described in the first embodiment can be used as the method for exchanging the security key, the detailed description thereof is omitted.
- the UE 10a detects the completion of the security procedure and transmits a direct communication response (S2010), and the UE-R 15 receives the direct communication response from the UE 10a.
- the direct communication response includes the direct communication ID and the IP address of the UE 10a.
- the UE-R 15 receives the direct communication response and confirms that the direct communication path has been established in the UE 10a. Further, the UE-R 15 manages the direct communication ID and the IP address of the UE 10a in the decentralized mode communication path included in the direct communication response.
- the UE-R 15 and the UE 10a establish a radio bearer (S2012).
- the UE-R 15 In establishing a radio bearer, the UE-R 15 notifies the UE 10a of communication resources for transmitting and receiving data on the decentralized mode communication path.
- Communication resources include, for example, information about frequency and information about time.
- the UE-R 15 can establish a decentralized mode communication path with the UE 10a.
- the UE-R 15 performs a decentralized mode communication path establishment procedure with the UE 10b.
- the decentralized mode communication path establishment procedure between the UE-R 15 and the UE 10b is the same as the decentralized mode communication path establishment procedure between the UE-R 15 and the UE 10a.
- UE-R15 transmits a communication alert directly to UE10b (S2014), UE10b receives a communication alert directly from UE-R15, UE10b transmits a communication alert response directly to UE-R15 (S2016), UE- R15 receives a direct communication alert response from UE10b, UE-R15 transmits a direct communication request to UE10b (S2018), UE10b receives a direct communication request from UE-R15, and UE10b and UE-R15 perform security procedures.
- the UE 10b transmits a direct communication response to the UE-R 15 (S2022), the UE-R 15 receives the direct communication response from the UE 10b, and the UE-R 15 and the UE 10b establish a radio bearer (S2024).
- the UE-R 15 can establish a decentralized mode communication path with the UE 10b.
- the UE 10a that has established a decentralized mode communication path with the UE-R 15 establishes a decentralized mode communication path with the UE 10b.
- the UE 10a transmits a communication alert directly to the UE 10b (S2026), and the UE 10b receives the communication alert directly from the UE 10a.
- the UE 10b detects that the UE 10a has a request for direct communication, and the UE 10b transmits a direct communication alert response to the UE 10a (S2028).
- the UE 10a receives the communication alert response directly from the UE 10b and detects that the decentralized mode communication path can be established. Next, the UE 10a transmits a communication request directly to the UE 10b (S2030).
- the direct communication request includes the direct communication ID indicating the communication path in the decentralized mode and the IP address of the UE 10a for transmitting and receiving data in the decentralized mode. Further, an APN or PDN connection identifier may be included.
- the UE 10b receives the direct communication request from the UE 10a, and manages the direct communication ID and the IP address of the UE 10a included in the direct communication request. Moreover, you may manage an APN and a PDN connection identifier.
- UE 10b and UE 10a perform security procedures (S2032). Since the security procedure can use the same method as the security procedure (S2008) performed by the UE-R 15 and the UE 10a, detailed description thereof is omitted.
- the UE 10b detects the completion of the security procedure and transmits a direct communication response (S2034), and the UE 10a receives the direct communication response from the UE 10b.
- the direct communication response includes the direct communication ID and the IP address of the UE 10b.
- the UE 10a and the UE 10b establish a radio bearer (S2036).
- the UE 10a In the establishment of the radio bearer, the UE 10a notifies the UE 10b of communication resources for transmitting and receiving data on the decentralized mode communication path.
- Communication resources include, for example, information about frequency and information about time.
- the UE 10a and the UE 10b can establish a decentralized mode communication path.
- the UE 10b may perform a procedure for establishing a decentralized mode communication path with the UE 10a. Note that when the UE 10b detects that the decentralized mode communication path is established with the UE 10a by receiving the communication alert directly from the UE 10a, the UE 10b does not perform the decentralized mode communication path establishment procedure with the UE 10a. May be.
- the procedure for the UE 10b to establish a decentralized mode communication path with the UE 10a is the same as the procedure for the UE 10a to establish a decentralized mode communication path with the UE 10b.
- the UE 10b transmits a direct communication alert to the UE 10a (S2038), the UE 10a transmits a direct communication alert response to the UE 10b (S2040), the UE 10b transmits a direct communication request to the UE 10a (S2042), and the UE 10a and the UE 10b are security.
- the procedure is performed (S2044), the UE 10a transmits a communication response directly to the UE 10b (S2046), and the UE 10b and the UE 10a establish a radio bearer (S2048).
- the UE 10b and the UE 10a can establish a decentralized mode communication path.
- FIG. 21 shows an example of a GO mode communication path deletion procedure including a request for switching to the decentralized mode. Note that this procedure may be omitted as long as the communication path establishment procedure includes a GO mode switching request.
- the UE-R 15 transmits a detach request to the UE 10a (S2104).
- the detach request includes a switch indicator indicating a request for switching to the decentralized mode.
- the indicator may not be a switch indicator as long as it is an indicator indicating a request for switching to the decentralized mode.
- the switch indicator is included in the detach request, other messages may be used instead of the detach request.
- switching to the decentralized mode communication path is indicated by including the switch indicator in one message of the GO mode communication path deletion procedure, but prior to the GO mode communication path deletion procedure, The UE-R 15 may transmit a request for switching to the decentralized mode to the UE 10a to notify the UE 10a of the switching to the communication path in the decentralized mode.
- the UE-R 15 may include the UE identifier in the detach request.
- the UE-R 15 can indicate and switch data related to the UE identifier in the GO mode communication path, which is a switching source.
- the UE-R 15 can indicate transmission / reception of data with the UE 10b to the UE 10a and switch transmission / reception of data with the UE 10b.
- the UE identifier is described as being included in the detach request, but other messages may be used instead of the detach request.
- the UE-R 15 may include the APN in the detach request. By indicating the APN, the UE-R 15 indicates data transmission / reception in the GO mode communication path established by the APN, and can switch the GO mode communication path corresponding to the APN.
- APN was included in the detach request here, other messages may be used instead of the detach request.
- the UE-R 15 may include the PDN connection identifier in the detach request.
- the UE-R 15 indicates data transmission / reception in the GO mode communication path corresponding to the PDN connection identifier, and can switch the GO mode communication path corresponding to the PDN connection identifier.
- the description has been given here of including the PDN connection identifier in the detach request other messages may be used instead of the detach request.
- the UE 10a may delete the TFT corresponding to the communication path in the GO mode when receiving the detach request from the UE-R 15.
- the TFT associated with the bearer ID may be deleted.
- the UE-R 15 transmits a detach request to the MME 30 (S2106).
- the detach request includes a relay connection indication.
- the information indicates that the UE is disconnected from the UE-R 15, it is not necessary to use the relay connection indication, and any information element may be used. Furthermore, an information element for identifying the UE to be disconnected may be included.
- the MME 30 receives the detach request from the UE-R 15.
- the MME 30 may receive the detach request and perform processing for deleting the PDN address (the IP address of the UE 10a) and the PDP context parameter.
- the MME 30 detects that the UE is disconnected from the UE-R 15 by the relay connection indication included in the detach request from the UE-R 15.
- the MME 30 may transmit an authentication request to the ProSe Server 90 (S2108).
- the MME 30 may include the UE identifier of the UE 10a connected to the UE-R 15 in the authentication request.
- the ProSe Server 90 receives an authentication request from the MME 30.
- the ProSe Server 90 that has received the authentication request may authenticate that the UE 10a performs ProSe, or may authenticate that the UE 10a connects to the core network via the UE-R 15.
- the ProSe Server 90 may extract the ProSe UE ID for identifying the UE 10a when authenticating that the UE 10a performs ProSe or authenticating the UE 10a connecting to the core network via the UE-R 15.
- the ProSe Server 90 transmits an authentication response to the MME 30 (S2110), and the MME 30 receives the authentication response from the ProSe Server 90.
- the ProSe Server 90 may notify the MME 30 of the ProSe UE ID.
- the MME 30 receives the authentication response from the ProSe Server 90, and detects that the UE 10a is disconnected from the UE-R 15.
- the MME 30 may perform processing for deleting the PDN address (IP address of the UE 10a) and the PDP context parameter.
- the MME 30 transmits a session deletion request to the SGW 40 / PGW 50 (S2112).
- the session deletion request includes the relay connection indication.
- the relay connection indication it may indicate to the SGW 40 / PGW 50 that the UE 10a establishes a communication path that ensures communication quality for transmitting and receiving data via the UE-R 15.
- the SGW40 / PGW50 receives the session deletion request from MME30.
- the ProSe Server 90 detects that the UE 10a disconnects the connection from the core network via the UE-R 15 by the relay connection indication included in the session deletion request. Thereby, the SGW 40 / PGW 50 may re-establish the communication path because the UE 10a does not transmit / receive data via the UE-R 15.
- the SGW 40 / PGW 50 transmits a session deletion response to the MME 30 (S2114), and the MME 30 receives the session establishment response from the SGW 40 / PGW 50. Thereby, the MME 30 confirms that the UE 10a deletes the communication path for transmitting and receiving data by connecting to the UE-R 15 between the PGW 50 and the SGW 30, between the SGW 30 and the eNB 20, and between the eNB 20 and the UE-R 15.
- the MME 30 transmits a detach response to the UE-R 15 (S2116), and the UE-R 15 receives the detach response from the MME 30.
- the UE-R 15 may delete the TFT for the communication path in the GO mode when receiving a detach response from the MME 30.
- the TFT associated with the bearer ID may be deleted.
- the UE-R 15 transmits a detach request to the MME 30 and obtains authentication for disconnecting the UE 10a.
- the UE-R 15 may not perform authentication for the UE 10a.
- the UE-R 15 does not need to transmit a detach request to the MME 30 (S2106).
- the MME 30 transmits an authentication request to the ProSe Server 90 (S2108), the ProSe Server 90 transmits an authentication response to the MME 30 (S2110), and the MME 30 transmits to the SGW 40 / PGW 50.
- a session deletion request is transmitted (S2112), the SGW 40 / PGW 50 transmits a session deletion response to the MME 30 (S2114), and the MME 30 does not need to transmit a detach response to the UE-R 15 (S2116).
- the UE 10a that has received the detach request transmits a detach response to the UE-R 15 (S2118), and the UE-R 15 receives the detach response from the UE 10a.
- the UE-R 15 may delete the TFT corresponding to the communication path in the GO mode when receiving the detach response from the UE 10a.
- the TFT associated with the bearer ID may be deleted.
- the UE-R 15 switches to the communication path in the decentralized mode (S1908).
- the UE-R 15 may switch only the data transmission / reception in the GO mode indicated by the UE identifier, the APN or the PDN connection identifier notified to the UE 10a or the UE 10b to the communication path in the decentralized mode.
- the UE 10a switches to the decentralized mode communication path (S1910).
- the UE 10a may switch only the data transmission / reception in the GO mode indicated by the UE identifier, the APN, or the PDN connection identifier notified from the UE-R 15 to the communication path in the decentralized mode.
- the UE 10b switches to the decentralized mode communication path (S1912).
- the UE 10b may switch only the data transmission / reception in the GO mode indicated by the UE identifier, the APN or the PDN connection identifier notified from the UE-R 15 to the communication path in the decentralized mode.
- the UE-R 15 notifies the UE 10a of the switch to the decentralized mode, and the UE-R 15 and the UE 10a can switch from the transmission / reception of the data in the GO mode communication path to the decentralized mode communication path. .
- the above procedure is similarly performed in the UE 10b.
- each of the UE 10a, UE 10b, and UE-R 15 can switch from data transmission / reception in the GO mode communication path to data transmission / reception in the decentralized mode communication path.
- FIG. 22 shows a main processing flow in the second embodiment.
- the UE 10a, UE 10b, and UE-R 15 perform a network connection procedure and a service registration procedure (S2202).
- the UE-R 15 and the UE 10 (UE 10a or UE 10b) perform a communication path establishment procedure in the decentralized mode (S2204).
- UE10 (UE10a and UE10b) and UE-R15 start transmission / reception of data in the communication path in the decentralized mode.
- the UE 10 and the UE-R 15 perform a procedure for switching to the GO mode communication path during transmission / reception of data in the decentralized mode communication path (S2206).
- the procedure for switching to the GO mode is performed by a communication path establishment procedure in the GO mode and a communication path deletion procedure in the decentralized mode.
- the UE 10a and the UE 10b perform the service registration procedure in advance, and the method can use the same method as that of the first embodiment, the description thereof is omitted.
- the UE-R 15 performs a service registration procedure in advance, and the method can be the same as that of the first embodiment, the description thereof is omitted. Further, since the UE 10a, UE 10b, and UE-R 15 can use the same method as in the first embodiment for establishing a communication path in the decentralized mode, detailed description thereof is omitted. Note that the TFTs in the UE 10a, UE 10b, and UE-R 15 when establishing a communication path in the decentralized mode can use the configuration described in the first embodiment in the same manner, and thus detailed description thereof is omitted.
- FIG. 23 shows a procedure for switching to the GO mode.
- the UE-R 15 performs an EPC connection procedure (S2304). Since the UE-R 15 connection procedure to the EPC can use the method described in the first embodiment, detailed description thereof is omitted.
- the UE-R 15 that has completed the connection procedure to the EPC transmits information on the GO mode to the UE 10a and the UE 10b (S2306), and the UE 10a and the UE 10b receive information on the GO mode from the UE-R 15. Since the information regarding the GO mode transmitted by the UE-R 15 is the same as that in the first embodiment, the detailed description thereof is omitted.
- the UE 10a detects that the communication path in the GO mode is available based on the information related to the GO mode (S2308).
- the UE 10a that has detected that the communication path in the GO mode is available transmits a GO mode switching request to the UE 10b (S2310).
- the UE identifier may be included in the GO mode switching request. By including the UE identifier, the UE 10a can indicate and switch data related to the UE identifier in a decentralized mode communication path that is a target of switching.
- the UE 10a can indicate data transmission / reception with the UE-R 15 to the UE 10b, and can switch data transmission / reception with the UE-R 15.
- the description has been given here of including the UE identifier in the GO mode switching request as long as the message is transmitted from the UE 10a to the UE 10b, another message may be used instead of the GO mode switching request.
- the UE 10a may include the APN in the GO mode switching request.
- the UE 10a indicates data transmission / reception in the decentralized mode communication path established by the APN, and can switch the decentralized mode communication path corresponding to the APN.
- the APN is included in the GO mode switching request, but other messages may be used instead of the GO mode switching request.
- the UE 10a may include the PDN connection identifier in the GO mode switching request.
- the UE 10a indicates data transmission / reception in the decentralized mode communication path corresponding to the PDN connection identifier, and can switch the decentralized mode communication path corresponding to the PDN connection identifier.
- the PDN connection identifier is included in the GO mode switching request, but other messages may be used instead of the GO mode switching request.
- the UE 10a may include permission information indicating that the GO mode and the decentralized mode can be switched in the GO mode switching request.
- the UE 10a transmits a GO mode switching request when the GO mode communication path is not established (S2310). May be transmitted (S2310). That is, the GO mode switching request may be transmitted (S2310) after the GO mode communication path establishment procedure including the GO mode switching request (S2320). Note that the GO mode communication path establishment procedure (S2320) including the request for switching to the GO mode will be described in detail later, and thus the description thereof will be omitted.
- the UE 10a determines, as a condition for transmitting the GO mode switching request, permission information (S1104 in FIG. 11) indicating that switching between the GO mode and the decentralized mode transmitted from the ProSe application server or the ProSeServer 90 is possible. You may do it.
- the UE 10a may transmit a GO mode switching request.
- the GO mode switching request sent from the ProSe application server or the ProSe Server 90 indicating that the switching between the GO mode and the decentralized mode cannot be performed does not have to be transmitted. Also good.
- the UE 10a manages permission information indicating that switching between the GO mode and the decentralized mode cannot be performed the UE 10a does not need to transmit a GO mode switching request.
- the UE 10b receives the GO mode switching request from the UE 10a. In response to the GO mode switching request, the UE 10b detects switching from the decentralized mode communication path to the GO mode communication path.
- the UE identifier when the UE identifier is included, it is detected that data transmission / reception corresponding to the UE identifier is switched.
- an APN When an APN is included, it is detected that data transmission / reception is switched in a communication path corresponding to the APN.
- the PDN connection identifier when the PDN connection identifier is included, it is detected that the transmission / reception of data on the communication path corresponding to the PDN connection identifier is switched.
- the UE 10b receives the GO mode switching request when the GO mode communication path is not established (S2310), but the UE 10b is configured to receive the GO mode communication path when the GO mode communication path is established.
- a mode switching request may be received (S2310). That is, the GO mode switching request may be received (S2310) after the GO mode communication path establishment procedure including the GO mode switching request (S2320). Note that the GO mode communication path establishment procedure (S2320) including the request for switching to the GO mode will be described in detail later, and thus the description thereof will be omitted.
- the UE 10b may determine the switching of the GO mode by including permission information indicating that the GO mode and the decentralized mode can be switched in the GO mode switching request.
- the UE 10b decides to switch the GO mode based on permission information (S1104 in FIG. 11) indicating that switching between the GO mode and the decentralized mode transmitted from the ProSe application server or the ProSeServer 90 can be performed. You may do it. If the UE 10b manages permission information indicating that the GO mode and the decentralized mode can be switched, the UE 10b may determine to switch the GO mode.
- permission information S1104 in FIG. 11
- the UE 10b does not switch the GO mode based on the permission information (S1104 in FIG. 11) indicating that switching between the GO mode and the decentralized mode transmitted from the ProSe application server or the ProSeServer 90 cannot be performed. May be determined. If the UE 10b manages permission information indicating that switching between the GO mode and the decentralized mode cannot be performed, the UE 10b may determine not to switch the GO mode.
- the UE 10b that has decided to switch to the communication path in the GO mode transmits a GO mode switching response to the UE 10a (S2312).
- the UE 10b may include permission information indicating that the GO mode and the decentralized mode can be switched in the GO mode switching response.
- the UE 10b may include permission information indicating that the GO mode and the decentralized mode can be switched in the GO mode switching response.
- the UE 10b may indicate that the GO mode and the decentralized mode can be switched by not including permission information indicating that the GO mode and the decentralized mode can be switched in the GO mode switching response.
- the UE 10b transmits the GO mode switching response when the GO mode communication path has not been established (S2312). However, the UE 10b has the GO mode communication path established when the GO mode communication path is established.
- a mode switching request may be transmitted (S2312). That is, the GO mode switching request may be transmitted (S2310) after the GO mode communication path establishment procedure including the GO mode switching request (S2320). Note that the GO mode communication path establishment procedure (S2320) including the request for switching to the GO mode will be described in detail later, and thus the description thereof will be omitted.
- the UE 10b determines, as a condition for transmitting the GO mode switching response, permission information (S1104) indicating that switching between the GO mode and the decentralized mode transmitted from the ProSe application server or the ProSe Server 90 is possible. Also good. Moreover, when managing permission information indicating that the UE 10b can switch between the GO mode and the decentralized mode, the UE 10b may transmit a GO mode switching response.
- the GO mode switching response transmitted from the ProSe application server or the ProSeServer 90 indicating that switching between the GO mode and the decentralized mode cannot be performed (S1104 in FIG. 11) does not need to be transmitted. good.
- the UE 10a manages permission information indicating that switching between the GO mode and the decentralized mode cannot be performed the UE 10a does not need to transmit a GO mode switching response.
- the UE 10a receives the GO mode switching response from the UE 10b. By this response, the UE 10a detects that the UE 10b has detected switching to the communication path in the GO mode.
- the UE 10b may detect the GO mode by receiving information on the GO mode (S2306) (S2314).
- the UE 10a receives the GO mode switching response when the GO mode communication path has not been established (S2312), but the UE 10b has the GO mode communication path established when the GO mode communication path is established.
- a mode switching response may be received (S2312). That is, a GO mode switching response may be received (S2312) after the GO mode communication path establishment procedure including the GO mode switching request (S2320). Note that the GO mode communication path establishment procedure (S2320) including the request for switching to the GO mode will be described in detail later, and thus the description thereof will be omitted.
- the UE 10a may make a determination based on the notification (S1104) indicating that the GO mode and the decentralized mode can be switched from the ProSe application server as a condition for detecting the switching of the GO mode. Further, the UE 10a manages that the GO mode and the decentralized mode can be switched, and when the GO mode and the decentralized mode can be switched, the switching of the GO mode may be detected.
- the UE 10a determines not to switch the GO mode based on the permission information (S1104) indicating that switching between the GO mode and the decentralized mode cannot be performed, which is transmitted from the ProSe application server or the ProSeServer 90. May be. If the UE 10a manages permission information indicating that switching between the GO mode and the decentralized mode cannot be performed, the UE 10a may determine not to switch the GO mode.
- the UE 10a may decide to switch the GO mode by including permission information indicating that the GO mode and the decentralized mode can be switched in the GO mode switching response. Note that the UE 10a may determine not to switch the GO mode by including permission information indicating that the GO mode and the decentralized mode cannot be switched in the GO mode switching response. . Further, the UE 10a may determine not to switch the GO mode because the permission information indicating that the GO mode and the decentralized mode can be switched is not included in the GO mode switching response.
- the UE 10b that has detected the GO mode may transmit a GO mode switching request to the UE 10a (S2316).
- the UE identifier may be included in the GO mode switching request.
- the UE 10b may indicate the transmission / reception of data related to the UE identifier in the decentralized mode communication path that is the switching source, and may switch the data.
- the message may be another message instead of the GO mode switching request.
- the UE 10b may include the APN in the GO mode switching request.
- the UE 10b may indicate data transmission / reception in the decentralized mode communication path established by the APN, and may switch the decentralized mode communication path corresponding to the APN.
- the message may be another message instead of the GO mode switching request.
- the UE 10b may include the PDN connection identifier in the GO mode switching request.
- the UE-R 15 indicates the PDN connection identifier, indicates data transmission / reception in the decentralized mode communication path corresponding to the PDN connection identifier, and switches the decentralized mode communication path corresponding to the PDN connection identifier. Can do.
- the PDN connection identifier is included in the GO mode switching request, but other messages may be used instead of the GO mode switching request.
- all data transmitted / received through the decentralized mode communication path may be detected as being switched to the decentralized mode communication path.
- the UE 10b may include permission information indicating that the GO mode and the decentralized mode can be switched in the GO mode switching request.
- the UE 10b receives the GO mode switching request from the UE 10a (S2310) before transmitting the GO mode switching request (S2316) to the UE 10a, the GO mode switching request may not be transmitted (S2316).
- the UE 10b transmits the GO mode switching request when the GO mode communication path is not established (S2316), but the UE 10b is configured to transmit the GO mode communication path when the GO mode communication path is established.
- a mode switching request may be transmitted (S2316).
- the GO mode switching request may be transmitted (S2320) after the GO mode communication path establishment procedure including the GO mode switching request (S2320). Note that the GO mode communication path establishment procedure (S2320) including the request for switching to the GO mode will be described in detail later, and thus the description thereof will be omitted.
- the UE 10b uses the permission information (S1104 in FIG. 11) indicating that the GO mode and the decentralized mode can be switched from the ProSe application server or the ProSe Server 90 as a condition for transmitting the GO mode switching request. You may judge. Further, when the UE 10b manages permission information indicating that the GO mode and the decentralized mode can be switched, the UE 10b may transmit a GO mode switching request.
- the GO mode switching request sent from the ProSe application server or the ProSe Server 90 indicating that switching between the GO mode and the decentralized mode cannot be performed does not have to be transmitted (S1104 in FIG. 11). Also good.
- the UE 10b manages permission information indicating that switching between the GO mode and the decentralized mode cannot be performed the UE 10b may not transmit a GO mode switching request.
- the UE 10a When the UE 10b transmits a GO mode switching request to the UE 10a (S2316), the UE 10a receives the GO mode switching request from the UE 10b.
- the UE 10a detects switching from the decentralized mode communication path to the GO mode communication path in response to the GO mode switching request.
- the UE identifier when the UE identifier is included, it is detected that data transmission / reception corresponding to the UE identifier is switched.
- an APN When an APN is included, it is detected that data transmission / reception is switched in a communication path corresponding to the APN.
- the PDN connection identifier when the PDN connection identifier is included, it is detected that the transmission / reception of data on the communication path corresponding to the PDN connection identifier is switched.
- the UE 10a receives the GO mode switching request when the GO mode communication path has not been established (S2316), but the UE 10a has established the GO mode communication path when the GO mode communication path is established.
- a mode switching request may be received (S2316). That is, the GO mode switching request may be received (S2316) after the GO mode communication path establishment procedure including the GO mode switching request (S2320). Note that the GO mode communication path establishment procedure (S2320) including the request for switching to the GO mode will be described in detail later, and thus the description thereof will be omitted.
- the UE 10a may decide to switch the GO mode by including permission information indicating that the GO mode and the decentralized mode can be switched in the GO mode switching request.
- the UE 10a determines to perform the GO mode switching based on the permission information (S1104) indicating that the GO mode and the decentralized mode can be switched from the ProSe application server or the ProSe Server 90. Also good.
- the UE 10a may determine to switch the GO mode.
- the UE 10a decides not to switch the GO mode based on the permission information (S1104) indicating that switching between the GO mode and the decentralized mode cannot be performed transmitted from the ProSe application server or the ProSe Server 90. You may do it. If the UE 10a manages permission information indicating that switching between the GO mode and the decentralized mode cannot be performed, the UE 10a may determine not to switch the GO mode.
- the UE 10a that has decided to switch to the communication path in the GO mode may transmit a GO mode switching response to the UE 10b (S2318).
- the UE 10a transmits a GO mode switching response to the UE 10b
- the UE 10a receives the GO mode switching response from the UE 10b.
- the UE 10b detects that the UE 10a has detected switching to the communication path in the GO mode.
- the UE 10a When the UE 10a receives the GO mode switching response from the UE 10b (S2312) before transmitting the GO mode switching response (S2318) to the UE 10b, the UE 10a does not need to transmit the GO mode switching response to the UE 10b (S2318). good.
- the UE 10a may include permission information indicating that the GO mode and the decentralized mode can be switched in the GO mode switching response.
- the UE 10b may include permission information indicating that the GO mode and the decentralized mode can be switched in the GO mode switching response.
- the UE 10a may indicate that the GO mode and the decentralized mode can be switched by not including permission information indicating that the GO mode and the decentralized mode can be switched in the GO mode switching response.
- the UE 10a transmits the GO mode switching response when the GO mode communication path is not established (S2318).
- a mode switching response may be transmitted (S2318). That is, a GO mode switching response may be transmitted (S2318) after the GO mode communication path establishment procedure including the GO mode switching request (S2320).
- the GO mode communication path establishment procedure (S2320) including the request for switching to the GO mode will be described in detail later, and thus the description thereof will be omitted.
- the UE 10a determines, as a condition for transmitting the GO mode switching response, permission information (S1104) indicating that the GO mode and the decentralized mode can be switched from the ProSe application server or the ProSe Server 90. Also good. Moreover, when managing permission information indicating that the UE 10b can switch between the GO mode and the decentralized mode, the UE 10b may transmit a GO mode switching response.
- the GO mode switching response may not be transmitted by the permission information (S1104) indicating that switching between the GO mode and the decentralized mode cannot be performed, which is transmitted from the ProSe application server or the ProSe Server 90.
- the UE 10b manages permission information indicating that switching between the GO mode and the decentralized mode cannot be performed, the UE 10b does not need to transmit a GO mode switching response.
- the UE10b receives the GO mode switching response. By this response, the UE 10b detects that the UE 10a has detected switching to the communication path in the GO mode. Further, when the UE identifier is included, it is detected that the transmission / reception of data corresponding to the UE identifier is switched. When an APN is included, it is detected that data transmission / reception is switched in a communication path corresponding to the APN. In addition, when the PDN connection identifier is included, it is detected that the transmission / reception of data on the communication path corresponding to the PDN connection identifier is switched.
- the UE 10b receives the GO mode switching response when the GO mode communication path has not been established (S2318). However, the UE 10b has the GO mode communication path established when the GO mode communication path is established. A mode switching response may be received (S2318). That is, the GO mode switching response may be received (S2318) after the GO mode communication path establishment procedure including the GO mode switching request (S2320). Note that the GO mode communication path establishment procedure (S2320) including the request for switching to the GO mode will be described in detail later, and thus the description thereof will be omitted.
- the UE 10b may make a determination based on the notification (S1104) indicating that switching between the GO mode and the decentralized mode can be performed from the ProSe application server as a condition for detecting the switching of the GO mode. Further, the UE 10b manages that the GO mode and the decentralized mode can be switched, and when the GO mode and the decentralized mode can be switched, the switching of the GO mode may be detected.
- the UE 10b determines not to switch the GO mode based on the permission information (S1104) indicating that switching between the GO mode and the decentralized mode cannot be performed, which is transmitted from the ProSe application server or the ProSeServer 90. May be. If the UE 10b manages permission information indicating that switching between the GO mode and the decentralized mode cannot be performed, the UE 10b may determine not to switch the GO mode.
- the UE 10b may determine the switching of the GO mode by including permission information indicating that the GO mode and the decentralized mode can be switched in the GO mode switching request. Note that the UE 10b may determine not to switch the GO mode by including permission information indicating that the GO mode and the decentralized mode cannot be switched in the GO mode switching request. . Further, the UE 10b may determine not to switch the GO mode because the permission information indicating that the GO mode and the decentralized mode can be switched is not included in the GO mode switching request.
- FIG. 24 shows an example of a communication path establishment procedure including a request for switching to the GO mode. Note that this procedure is not necessary as long as it is a communication path establishment procedure including a request for switching to the GO mode.
- the UE 10a transmits an attach request to the UE-R 15 (S2404).
- the attach request includes a switch indicator indicating a request for switching to the GO mode.
- the indicator may not be a switch indicator as long as it is an indicator indicating a request for switching to the GO mode.
- the switch indicator is included in the attach request, other messages may be used instead of the attach request.
- the switch to the GO mode communication path is indicated by including the switch indicator in one message of the GO mode communication path establishment procedure.
- the UE 10a A switch request message for switching to the GO mode may be transmitted to the UE-R 15 to notify the UE-R 15 of the switch to the communication path for the GO mode.
- the UE 10a may include a UE identifier in the attach request.
- the UE 10a can indicate and switch data related to the UE identifier in a decentralized mode communication path that is a target of switching.
- the UE 10a can indicate data transmission / reception with the UE 10b to the UE-R 15 and switch data transmission / reception with the UE 10b.
- the UE identifier has been described as being included in the attach request, but other messages may be used instead of the attach request.
- the UE-R 15 may include the APN in the attach request.
- the UE-R 15 indicates data transmission / reception in the decentralized mode communication path in the APN, and can switch the decentralized mode communication path corresponding to the APN.
- APN is included in the attach request, but other messages may be used instead of the attach request.
- the UE-R 15 may include the PDN connection identifier in the attach request. By indicating the PDN connection identifier, the UE-R 15 indicates data transmission / reception in the decentralized mode communication path in the PDN connection identifier, and can switch the decentralized mode communication path corresponding to the PDN connection identifier. .
- the PDN connection identifier is included in the attach request, but other messages may be used instead of the attach request.
- all data transmitted / received through the GO mode communication path may be detected as being switched to the GO mode communication path.
- the UE 10a uses the permission information (S1104 in FIG. 11) indicating that it is possible to switch between the GO mode and the decentralized mode transmitted from the ProSe application server or the ProSeServer 90 as a condition for transmitting the attach request including the switch indicator. You may judge.
- the UE 10a may transmit an attach request including a switch indicator.
- the permission request (S1104 in FIG. 11) indicating that switching between the GO mode and the decentralized mode transmitted from the ProSe application server or the ProSeServer 90 cannot be performed does not send an attach request including the switch indicator. Also good.
- the UE 10a manages permission information indicating that switching between the GO mode and the decentralized mode cannot be performed the UE 10a does not need to transmit an attach request including a switch indicator.
- the UE 10a may transmit an attach request including a switch indicator by receiving a GO mode switching response from the UE 10b (S2312 in FIG. 23).
- the UE 10a may transmit an attach request including a switch indicator by including permission information indicating that the GO mode and the decentralized mode can be switched in the GO mode switching response.
- the UE 10a does not need to send an attach request including a switch indicator because the permission information indicating that the GO mode and the decentralized mode cannot be switched is included in the GO mode switching response.
- the UE 10a does not need to transmit an attach request including the switch indicator.
- the UE 10a may transmit an attach request including a switch indicator by receiving a GO mode switching request from the UE 10b (S2316 in FIG. 23).
- the UE 10a may transmit an attach request including a switch indicator by including permission information indicating that the GO mode and the decentralized mode can be switched in the GO mode switching request.
- the UE 10a may perform proximity detection in order to detect whether it can be transmitted to the UE-R 15.
- the UE 10a may request the core network 7 or the ProSe Server 90 for proximity detection.
- the UE-R 15 receives the attach request from the UE 10a.
- the UE 10a detects switching from the decentralized mode communication path to the GO mode communication path by using the switch indicator included in the attach request.
- the UE identifier when the UE identifier is included, it is detected that the transmission / reception of data in the decentralized mode corresponding to the UE identifier is switched.
- an APN when an APN is included, it is detected that data transmission / reception in a decentralized mode communication path corresponding to the APN is switched.
- the PDN connection identifier When the PDN connection identifier is included, it is detected that the transmission / reception of data in the decentralized mode corresponding to the PDN connection identifier is switched.
- the UE-R 15 may transmit an attach request to the MME 30 (S2406).
- the attach request includes a relay connection indication.
- the relay connection indication is information indicating that a UE such as the UE 10a or the UE 10b is connected to the UE-R 15.
- the information indicating that the UE is connected to the UE-R 15 is the relay connection indication, but any information element may be used as long as the information indicates that the UE is connected to the UE-R 15. good.
- an information element for identifying a connected UE may be included.
- the MME 30 receives the attach request from the UE-R 15.
- the MME 30 may receive the attach request and perform processing for generating a PDN address (IP address of the UE 10a) and a PDP context parameter.
- the MME 30 detects that the UE 10a is connected to the UE-R 15 based on the relay connection indication included in the attach request from the UE-R 15.
- the MME 30 may transmit an authentication request to the ProSe Server 90 (S2408).
- the MME 30 may include the UE identifier of the UE 10a connected to the UE-R 15 in the authentication request.
- the ProSe Server 90 receives an authentication request from the MME 30.
- the ProSe Server 90 that has received the authentication request may authenticate that the UE 10a performs ProSe, or may authenticate that the UE 10a connects to the core network via the UE-R 15.
- the ProSe Server 90 authenticates that the UE 10a performs ProSe, or authenticates the connection to the core network via the UE-R 15, the ProSe Server 90 identifies the UE 10a that can be used for proximity detection in ProSe or direct communication path establishment. ProSe UE ID may be extracted.
- the ProSe Server 90 transmits an authentication response to the MME 30 (S2410), and the MME 30 receives the authentication response from the ProSe Server 90.
- the ProSe Server 90 may notify the MME 30 of the ProSe UE ID.
- the MME 30 receives the authentication response from the ProSe Server 90, and detects that the UE 10a is connected to the UE-R 15.
- MME30 may perform the process for producing
- the MME 30 transmits a session establishment request to the SGW 40 / PGW 50 (S2412).
- the connection establishment indication includes the relay connection indication. By including the relay connection indication, it may indicate to the SGW 40 / PGW 50 that the UE 10a establishes a communication path that ensures communication quality for transmitting and receiving data via the UE-R 15.
- the SGW 40 / PGW 50 receives a session establishment request from the MME 30.
- the ProSe Server 90 detects that the UE 10a is connected to the core network via the UE-R 15 based on the relay connection indication included in the session establishment request. Thereby, the SGW 40 / PGW 50 may establish a communication path that ensures communication quality in order for the UE 10a to transmit and receive data via the UE-R 15.
- the SGW 40 / PGW 50 transmits a session establishment response to the MME 30 (S2414), and the MME 30 receives the session establishment response from the SGW 40 / PGW 50.
- the MME 30 confirms that the UE 10a establishes a communication path for transmitting and receiving data by connecting to the UE-R 15 between the PGW 50 and the SGW 30, between the SGW 30 and the eNB 20, and between the eNB 20 and the UE-R 15.
- the MME 30 transmits an attach response to the UE-R 15 (S2416), and the UE-R 15 receives the attach response from the MME 30.
- the UE-R 15 has secured a communication path in which the UE 10a can transmit and receive data via the UE-R 15 in the core-network communication path with the UE-R 15.
- the UE-R 15 may generate a TFT when receiving an attach response from the MME 30.
- the TFT and the bearer ID may be managed in association with each other and used to determine the data transmission destination.
- information related to communication quality may be set in association with each other, and data may be transmitted according to the communication quality.
- the UE-R 15 transmits an attach request to the MME 30 and obtains authentication for the UE 10a. If the UE-R 15 is authenticated in advance for enabling the relay function, the UE-R 15 performs authentication for the UE 10a. It does not have to be done. That is, the UE-R 15 does not need to transmit an attach request to the MME 30 (S2406). If the UE-R 15 does not send an attach request to the MME 30, the MME 30 sends an authentication request to the ProSe Server 90 (S2408), the ProSe Server 90 sends an authentication response to the MME 30 (S2410), and the MME 30 sends to the SGW 40 / PGW 50. The session establishment request is transmitted (S2412), the SGW 40 / PGW 50 transmits the session establishment response to the MME 30 (S2414), and the MME 30 does not need to transmit the attach response to the UE-R 15 (S2416).
- the UE-R 15 transmits an attach response to the UE 10a (S2418), and the UE 10a receives the attach response from the UE-R 15.
- the UE-R 15 may receive information such as an APN, a PDN address, a bearer ID, and a PDP context parameter by an attach response from the MME 30, and notify the UE 10a together with the attach response.
- the UE-R 15 may receive information such as an APN, a PDN address, a bearer ID, and a PDP context parameter in advance in a network registration procedure or a service registration procedure in a relay and notify the UE 10a together with an attach response.
- information such as an APN, a PDN address, a bearer ID, and a PDP context parameter in advance in a network registration procedure or a service registration procedure in a relay and notify the UE 10a together with an attach response.
- the UE 10a may generate a TFT when receiving an attach response from the UE-R 15.
- the TFT and the bearer ID may be managed in association with each other and used to determine the data transmission destination.
- information related to communication quality may be set in association with each other, and data may be transmitted according to the communication quality.
- a TFT may not be generated, and data in all applications may be transmitted to the established communication path.
- the UE 10a can establish a communication path in the GO mode.
- the UE 10b transmits an attach request to the UE-R 15 (S2420), the UE-R 15 transmits an attach request to the MME 30 (S2422), the MME 30 transmits an authentication request to the ProSe Server 90 (S2424), and the ProSe Server 90
- An authentication response is sent to the MME 30 (S2426), the MME 30 sends a session establishment request to the SGW 40 / PGW 50 (S2428), the SGW 40 / PGW 50 sends a session establishment response to the MME 30 (S2430), and the MME 30 attaches to the UE-R 15
- a response is transmitted (S2432), and UE-R 15 transmits an attach response to UE 10b.
- the UE-R 15 does not need to authenticate the UE 10b if the UE-R 15 is previously authenticated for enabling the relay function.
- the UE-R 15 sends an attach request to the MME 30 (S2422), the MME 30 sends an authentication request to the ProSe Server 90 (S2424), the ProSe Server 90 sends an authentication response to the MME 30 (S2426), and the MME 30 sends the SGW 40 / A session establishment request is transmitted to the PGW 50 (S2428), the SGW 40 / PGW 50 transmits a session establishment response to the MME 30 (S2430), and the MME 30 does not need to transmit an attach response to the UE-R 15 (S2432).
- the UE 10b can establish a communication path in the GO mode.
- the UE 10a, the UE 10b, and the UE-R 15 can establish a communication path in the GO mode and transmit / receive data.
- the TFTs in the UE 10a, UE 10b, and UE-R 15 when the communication path in the GO mode is established can use the configuration described in the first embodiment in the same manner, and thus detailed description thereof is omitted.
- the UE 10a detects that the GO mode communication path establishment procedure has been completed, and the UE 10a switches from the decentralized mode communication path to the GO mode communication path (S2322).
- the UE 10a may switch only the data transmission / reception in the decentralized mode indicated by the UE identifier, the APN, or the PDN connection identifier notified to the UE-R 15 to the communication path in the GO mode.
- the UE 10b detects that the GO mode communication path establishment procedure has been completed, and the UE 10b switches from the decentralized mode communication path to the GO mode communication path (S2324).
- the UE 10a may switch only the data transmission / reception in the decentralized mode indicated by the UE identifier, the APN, or the PDN connection identifier notified to the UE-R 15 to the communication path in the GO mode.
- the UE-R 15 detects the completion of the GO mode communication path establishment procedure with the UE 10a, detects the completion of the GO mode communication path establishment procedure with the UE 10b, and the UE-R 15 detects the decentralized mode. Switching from the communication path to the communication path in the GO mode is performed (S2326).
- the UE-R 15 may switch only the transmission / reception of data in the decentralized mode indicated by the UE identifier, the APN, or the PDN connection identifier notified from the UE 10a or the UE 10b to the communication path in the GO mode.
- FIG. 25 shows an example of the communication path establishment procedure in the decentralized mode. Note that this procedure does not have to be a procedure for establishing a communication path in the decentralized mode.
- the UE-R 15 transmits a direct communication disconnection request in order to delete the decentralized mode communication path with the UE 10a (S2502).
- the direct communication disconnection request includes the direct communication ID indicating the communication path in the decentralized mode and the IP address of the UE-R 15.
- the UE 10a receives the direct communication disconnection request from the UE-R 15, and deletes the decentralized mode communication path with the UE-R 15 based on the direct communication ID and the IP address of the UE-R 15 included in the direct communication disconnect request.
- the UE 10a detects that the communication path in the decentralized mode with the UE-R 15 is deleted, transmits a direct communication disconnection response (S2504), and the UE-R 15 receives the direct communication disconnection response from the UE 10a.
- the direct communication response includes the direct communication ID and the IP address of the UE 10a.
- the UE-R 15 receives the direct communication disconnection response and confirms that the decentralized mode communication path has been deleted in the UE 10a. Further, the UE-R 15 deletes the decentralized mode communication path with the UE 10a based on the direct communication ID included in the direct communication disconnection response and the IP address of the UE 10a.
- the UE-R 15 and the UE 10a release the radio bearer (S2506).
- the UE-R 15 In releasing the radio bearer, the UE-R 15 notifies the UE 10a of a communication resource for transmitting / receiving data on the communication path in the decentralized mode so that the communication resource is not used.
- the UE-R 15 can delete the decentralized mode communication path with the UE 10a.
- the UE-R 15 performs a decentralized mode communication path establishment procedure with the UE 10b.
- the UE-R 15 and the decentralized mode communication path deletion procedure with the UE 10b are the same as the UE-R 15 and the decentralized mode communication path deletion procedure with the UE 10b. That is, UE-R15 transmits a direct communication disconnection request to UE10b (S2508), UE10b receives a direct communication disconnection request from UE-R15, UE10b transmits a direct communication disconnection response to UE-R15 (S2510), The UE-R 15 receives the direct communication disconnection response from the UE 10b, and the UE-R 15 and the UE 10b release the radio bearer (S2512).
- the UE-R 15 can delete the decentralized mode communication path with the UE 10b.
- the UE 10a that has deleted the communication path in the decentralized mode with the UE-R 15 deletes the communication path in the decentralized mode with the UE 10b.
- the UE 10a transmits a communication disconnection request directly to the UE 10b (S2514).
- the direct communication disconnection request includes the direct communication ID indicating the communication path in the decentralized mode and the IP address of the UE 10a.
- the UE 10b receives the direct communication request from the UE 10a, and deletes the decentralized mode communication path with the UE 10a based on the direct communication ID and the IP address of the UE 10a included in the direct communication disconnection request.
- the UE 10b detects that the decentralized mode communication path with the UE 10a has been deleted, and transmits a direct communication disconnection response (S2516), and the UE 10a receives the direct communication disconnection response from the UE 10b.
- the direct communication disconnection response includes the direct communication ID and the IP address of the UE 10b.
- the UE-R 15 receives the direct communication disconnection response and confirms that the decentralized mode communication path has been deleted in the UE 10a. Further, the UE-R 15 deletes the decentralized mode communication path with the UE 10a based on the direct communication ID included in the direct communication disconnection response and the IP address of the UE 10a.
- the UE-R 15 and the UE 10a release the radio bearer (S2518).
- the UE-R 15 In releasing the radio bearer, the UE-R 15 notifies the UE 10a of a communication resource for transmitting / receiving data on the communication path in the decentralized mode so that the communication resource is not used.
- the UE 10a and the UE 10b can delete the decentralized mode communication path.
- the UE 10b may perform a communication path deletion procedure in the decentralized mode with the UE 10a. If the UE 10b detects that the communication path in the decentralized mode is deleted from the UE 10a by receiving the communication disconnection request directly from the UE 10a, the UE 10b performs the communication path deletion procedure in the decentralized mode from the UE 10a. It does not have to be.
- the procedure for the UE 10b to delete the communication path in the decentralized mode with the UE 10a is the same as the procedure for the communication path deletion in the decentralized mode with the UE 10b.
- UE 10b transmits a communication disconnection request directly to UE 10a (S2520), UE 10a transmits a communication disconnection response directly to UE 10b (S2522), and UE 10b and UE 10a release a radio bearer (S2524).
- the UE 10b and the UE 10a can delete the decentralized mode communication path.
- the UE 10a, the UE 10b, and the UE-R 15 can switch from data transmission / reception in the decentralized mode communication path to data transmission / reception in the GO mode communication path.
- the GO mode communication path is switched by the communication path establishment procedure including the GO mode switching request.
- the GO mode switching request is issued.
- the switching procedure may be performed in the communication path deletion procedure in the decentralized mode.
- the UE 10a and the UE 10b perform the service registration procedure in advance, and the method can use the same method as that of the first embodiment, the description thereof is omitted.
- the UE-R 15 performs a service registration procedure in advance, and the method can be the same as that of the first embodiment, the description thereof is omitted. Further, since the UE 10a, UE 10b, and UE-R 15 can use the same method as in the first embodiment for establishing a communication path in the decentralized mode, detailed description thereof is omitted. Note that the TFTs in the UE 10a, UE 10b, and UE-R 15 when establishing a communication path in the decentralized mode can use the configuration described in the first embodiment in the same manner, and thus detailed description thereof is omitted.
- FIG. 26 shows a procedure for switching to the GO mode.
- the UE-R 15 performs an EPC connection procedure (S2604). Since the UE-R 15 connection procedure to the EPC can use the method described in the first embodiment, detailed description thereof is omitted.
- the UE-R 15 that has completed the connection procedure to the EPC transmits information about the GO mode to the UE 10a and the UE 10b (S2606), and the UE 10a and the UE 10b receive information about the GO mode from the UE-R 15. Since the information regarding the GO mode transmitted by the UE-R 15 is the same as that in the first embodiment, the detailed description thereof is omitted.
- the UE 10a detects that the communication path in the GO mode is available based on the information related to the GO mode (S2608). Further, the UE 10b detects that the communication path in the GO mode is available based on the information related to the GO mode (S2610).
- the UE 10a and the UE 10b perform a GO mode communication path establishment procedure (S2612).
- a GO mode communication path establishment procedure the method described in the first embodiment can be used in the same manner, and the detailed description thereof will be omitted.
- the UE 10a and the GO-mode communication path establishment procedure are completed, and the UE-R 15 that has completed the GO-mode communication path establishment procedure switches to the GO mode (S2614).
- the UE-R 15 performs a decentralized mode communication path deletion procedure including a request to switch to the UE mode communication path with the UE 10a.
- the UE-R 15 transmits a communication disconnection request directly to the UE 10a (S2616).
- the direct communication disconnection request includes a switch indicator indicating a request for switching to the GO mode.
- the indicator may not be a switch indicator as long as it is an indicator indicating a request for switching to the GO mode.
- the switch indicator is included in the direct communication disconnection request, but other messages may be used instead of the direct communication disconnection request.
- switching to the GO mode communication path is indicated by including the switch indicator in one message of the decentralized mode communication path deletion procedure.
- the UE-R 15 may transmit a GO mode switching request message to the UE 10a to notify the UE 10a of switching to the GO mode communication path.
- the UE-R 15 may include the UE identifier in the direct communication disconnection request.
- the UE-R 15 may indicate the transmission / reception of data related to the UE identifier in the decentralized mode communication path that is the switching source, and may switch the data.
- the UE identifier is included in the direct communication disconnection request, but other messages may be used instead of the direct communication disconnection request.
- the UE-R 15 may include the APN in the direct communication disconnection request.
- the UE-R 15 may indicate data transmission / reception in the decentralized mode communication path in the APN by indicating the APN, and may switch the decentralized mode communication path corresponding to the APN. Note that, here, the APN is included in the direct communication disconnection request, but other messages may be used instead of the direct communication disconnection request.
- the UE-R 15 may include the PDN connection identifier in the direct communication disconnection request.
- the UE-R 15 indicates the PDN connection identifier, indicates data transmission / reception in the decentralized mode communication path corresponding to the PDN connection identifier, and switches the decentralized mode communication path corresponding to the PDN connection identifier. Also good.
- the PDN connection identifier is included in the direct communication disconnection request, but other messages may be used instead of the direct communication disconnection request.
- all data transmitted / received through the decentralized mode communication path may be detected as being switched to the GO mode communication path.
- the UE 10a receives a communication disconnection request directly from the UE-R 15.
- the UE 10a detects switching from the decentralized mode communication path to the GO mode communication path by the switch indicator included in the direct communication disconnection request.
- the UE identifier when the UE identifier is included, it is detected that the transmission / reception of data in the decentralized mode corresponding to the UE identifier is switched. Further, when an APN is included, it is detected that the transmission / reception of data in the decentralized mode corresponding to the APN is switched. When the PDN connection identifier is included, it is detected that the transmission / reception of data in the decentralized mode corresponding to the PDN connection identifier is switched.
- the UE 10a that has detected the switching to the communication path in the GO mode switches the transmission / reception of the data in the communication path in the decentralized mode to the established communication path in the GO mode (S2618).
- the UE 10a transmits a direct communication disconnection response to the UE-R 15 (S2620), and the UE-R 15 receives the direct communication disconnection response from the UE 10a. From this response, the UE-R 15 detects that the UE 10a has switched to the communication path in the GO mode. Further, the UE-R 15 and the UE 10a may release the radio bearer when there is no data transmission / reception in the decentralized mode communication path (S2622).
- the UE-R 15 notifies the UE 10a of switching to the GO mode communication path, and the UE-R 15 and the UE 10a can switch from the decentralized mode communication path to the GO mode communication path.
- the UE-R 15 performs a communication path deletion procedure including a request for switching to the communication path in the GO mode with the UE 10b.
- the communication path deletion procedure including the UE-R 15 switching request to the UE 10b and the GO mode is the same as the communication path deletion procedure including the UE-R 15 switching request to the UE 10a and the GO mode.
- the UE-R 15 transmits a direct communication disconnection request to the UE 10b (S2624), the UE 10b receives the direct communication disconnection request from the UE-R 15, the UE 10b switches to the GO mode (S2626), and the UE 10b A direct communication disconnection response is transmitted to R15 (S2628), UE-R15 receives the direct communication disconnection response from UE10b, and UE-R15 and UE10b release the radio bearer (S2628).
- the UE-R 15 notifies the UE 10b of switching to the GO mode communication path, and the UE-R 15 and the UE 10b can switch from the decentralized mode communication path to the GO mode communication path.
- FIG. 27 shows an example of a decentralized mode communication path deletion procedure between the UE 10a and the UE 10b. Note that this procedure is not necessary as long as it is a decentralized mode communication path establishment procedure between the UE 10a and the UE 10b.
- the UE 10a transmits a communication disconnection request directly to the UE 10b (S2702).
- the direct communication disconnection request includes the direct communication ID indicating the communication path in the decentralized mode and the IP address of the UE 10a.
- the UE 10b receives the direct communication request from the UE 10a, and deletes the decentralized mode communication path with the UE 10a based on the direct communication ID and the IP address of the UE 10a included in the direct communication disconnection request.
- the UE 10b detects that the decentralized mode communication path with the UE 10a has been deleted, and transmits a direct communication disconnection response (S2704), and the UE 10a receives the direct communication disconnection response from the UE 10b.
- the direct communication disconnection response includes the direct communication ID and the IP address of the UE 10b.
- the UE-R 15 receives the direct communication disconnection response and confirms that the decentralized mode communication path has been deleted in the UE 10a. Further, the UE-R 15 deletes the decentralized mode communication path with the UE 10a based on the direct communication ID included in the direct communication disconnection response and the IP address of the UE 10a.
- the UE-R 15 and the UE 10a release the radio bearer (S2706).
- the UE-R 15 In releasing the radio bearer, the UE-R 15 notifies the UE 10a of a communication resource for transmitting / receiving data on the communication path in the decentralized mode so that the communication resource is not used.
- the UE 10a and the UE 10b can delete the decentralized mode communication path.
- the UE 10b may perform a communication path deletion procedure in the decentralized mode with the UE 10a. If the UE 10b detects that the communication path in the decentralized mode is deleted from the UE 10a by receiving the communication disconnection request directly from the UE 10a, the UE 10b performs the communication path deletion procedure in the decentralized mode from the UE 10a. It does not have to be.
- the procedure for the UE 10b to delete the communication path in the decentralized mode with the UE 10a is the same as the procedure for the communication path deletion in the decentralized mode with the UE 10b.
- the UE 10b transmits a communication disconnection request directly to the UE 10a (S2708), the UE 10a transmits a direct communication disconnection response to the UE 10b (S2710), and the UE 10b and the UE 10a release the radio bearer (S2712).
- the UE 10b and the UE 10a can delete the decentralized mode communication path.
- the UE-R 15 is included in the same group as the UE 10a and the UE 10b.
- the UE-R 15 is the UE 10a and the UE 10b. The case where it is not included in the same group will be described.
- the decentralized mode is such that the UE 10a, the UE 10b, and the UE-R 15 directly transmit / receive data, but the third embodiment Then, the UE-R 15 that is not in the same group does not transmit / receive data between the UE 10a and the UE 10b. That is, in the decentralized mode of the third embodiment, data is transmitted / received only between the UE 10a and the UE 10b.
- FIG. 28 shows an example of data transmission / reception in the decentralized mode in the third embodiment.
- the UE 10a directly communicates with the UE 10b instead of transmitting and receiving data via the UE-R 15. Further, the UE 10b indicates that the UE 10R directly communicates with the UE-R 15 and / or the UE 10a.
- the main processing flow in the third embodiment can use the same method as in the first embodiment, the description thereof is omitted. Furthermore, since the UE 10a and the UE 10b perform the procedure for registering the ProSe application in advance, and the method thereof can be the same as that of the first embodiment, the description thereof is omitted. In addition, the UE-R 15 performs a network connection procedure and a service registration procedure in advance, and a method similar to that of the first embodiment can be used as the method. Further, since the UE 10a and the UE 10b can use the same method as that of the first embodiment in establishing the communication path in the GO mode, detailed description thereof is omitted.
- FIG. 29 shows an example of TFTs in the UE 10a, UE 10b, and UE-R 15 when the communication path in the GO mode is established.
- FIG. 29 shows an example of the TFT in the application 1. Here, only the example in the application 1 is shown, but the application 2 and the application 3 may be managed in the TFT.
- bearer ID 1a is a bearer ID indicating a communication path in the GO mode established by UE 10a with UE-R 15.
- the UE 10a can transmit and receive data in the application 1 on the communication path in the GO mode by managing the TFT.
- the UE 10a transmits to the UE-R 15, the UE-R 15 transmits data received from the UE 10a to the eNB 20, and the eNB 20 transmits data received from the UE-R 15 to the SGW 40.
- the SGW 40 transmits the data received from the eNB 20 to the PGW 50, and the PGW 50 transmits the data received from the SGW 40 to the PDN 80.
- a process for detecting a route to the UE 10b (routing process) is performed, and data is transmitted to the PGW 50 again.
- the PGW 50 transmits the data received from the PDN 80 to the SGW 40
- the SGW 40 transmits the data received from the PGW 50 to the eNB 20
- the eNB 20 transmits the data received from the SGW 40 to the UE-R 15, and the UE-R 15 receives the data received from the eNB 20.
- the application 1 is managed in association with the bearer ID 1b.
- the bearer ID 1b is a bearer ID indicating a communication path established by the UE 10b with the UE-R 15, and indicates that when data is transmitted in the application 1, the UE 10b transmits to the UE-R 15.
- the UE 10b can transmit and receive data in the application 1 on the communication path in the GO mode by managing the TFT.
- UE 10b transmits to UE-R 15, UE-R 15 transmits data received from UE 10b to eNB 20, and eNB 20 transmits data received from UE-R 15 to SGW 40.
- the SGW 40 transmits the data received from the eNB 20 to the PGW 50, and the PGW 50 transmits the data received from the SGW 40 to the PDN 80.
- processing for detecting a route to the UE 10a (routing processing) is performed, and data is transmitted to the PGW 50 again.
- the PGW 50 transmits the data received from the PDN 80 to the SGW 40
- the SGW 40 transmits the data received from the PGW 50 to the eNB 20
- the eNB 20 transmits the data received from the SGW 40 to the UE-R 15, and the UE-R 15 receives the data received from the eNB 20.
- the TFT in the UE-R 15 does not manage the communication path.
- FIG. 30 shows a procedure for switching to the decentralized mode. Note that switching to the decentralized mode is performed during transmission / reception of data on the communication path in the GO mode.
- the UE 10a detects a trigger for switching to the decentralized mode (S3002).
- the detection of the trigger for switching to the decentralized mode may be detected by, for example, the presence of a group member in the vicinity. That is, the switching trigger may be detected by detecting that the UE 10a and the UE 10b exist in the vicinity.
- the detection of the trigger for switching to the decentralized mode may be determined by detecting that the UE 10a does not exist in the vicinity of the UE-R 15 and the communication path in the GO mode cannot be maintained. Subsequently, the UE 10a may perform proximity detection (S3004).
- the method demonstrated by 1st Embodiment can be utilized similarly for the method in which UE10a performs proximity
- the UE 10a performs a decentralized mode communication path establishment procedure including a request for switching to the decentralized mode communication path. Note that this procedure is not necessary as long as the communication path establishment procedure includes a request for switching to the decentralized mode.
- the UE 10a transmits a communication alert directly to the UE 10b (S3006).
- the direct communication alert includes a switch indicating a request for switching to the decentralized mode. Include indicator. Note that it is not necessary to use the switch indicator as long as it is an indicator indicating a request for switching to the decentralized mode.
- the switch indicator is included in the direct communication alert, but other messages may be used instead of the direct communication alert.
- switching to the decentralized mode communication path is indicated by including the switch indicator in one message for establishing the decentralized mode communication path, but the decentralized mode communication path establishment procedure is shown.
- the UE 10a may transmit a request for switching to the decentralized mode to the UE 10b to notify the UE 10b of the switching to the communication path in the decentralized mode.
- the UE 10a may include the UE identifier in the direct communication alert.
- the UE 10a can indicate and switch data related to the UE identifier in the GO mode communication path that is the target of switching. For example, when the UE identifier indicating the UE 10a is included, the UE 10a can indicate data transmission / reception with the UE 10a to the UE 10b and switch data transmission / reception with the UE 10a.
- the UE identifier is included in the direct communication alert, other messages may be used instead of the direct communication alert.
- the UE 10a may include the APN in the direct communication alert.
- the UE 10a indicates data transmission / reception in the GO mode communication path in the APN, and can switch the GO mode communication path corresponding to the APN.
- the APN is included in the direct communication alert, but other messages may be used instead of the direct communication alert.
- the UE 10a may include the PDN connection identifier in the direct communication alert.
- the UE 10a indicates data transmission / reception in the GO mode communication path corresponding to the PDN connection identifier, and can switch the GO mode communication path corresponding to the PDN connection identifier.
- the PDN connection identifier is included in the direct communication alert, but other messages may be used instead of the direct communication alert.
- all data transmitted / received through the GO mode communication path may be detected as switching to the decentralized mode communication path.
- the UE 10a may include permission information indicating that the GO mode and the decentralized mode can be switched in the direct communication alert.
- the permission information indicates that the UE 10a can switch between the GO mode and the decentralized mode transmitted from the ProSe application server or the ProSe Server 90 as a condition for transmitting a direct communication alert including the switch indicator. ).
- a direct communication alert including a switch indicator may be transmitted.
- the direct communication alert including the switch indicator may not be transmitted by the permission information (S1104) indicating that switching between the GO mode and the decentralized mode transmitted from the ProSe application server or the ProSe Server 90 cannot be performed.
- the UE 10a manages permission information indicating that switching between the GO mode and the decentralized mode cannot be performed, the UE 10a does not have to transmit a direct communication alert including the switch indicator.
- UE 10b receives a communication alert directly from UE 10a.
- the UE 10b detects switching from the communication path in the GO mode to the communication path in the decentralized mode by using the switch indicator included in the direct communication alert.
- the UE identifier when the UE identifier is included, it is detected that the transmission / reception of GO mode data corresponding to the UE identifier is switched. If an APN is included, it is detected that the transmission / reception of GO mode data corresponding to the APN is switched. When the PDN connection identifier is included, it is detected that the transmission / reception of GO mode data corresponding to the PDN connection identifier is switched.
- the UE 10b that has detected switching to the decentralized mode communication path transmits a communication alert response directly to the UE 10a (S3008), and the UE 10a receives the communication alert response directly from the UE 10b. By this response, the UE 10a detects that the UE 10b has detected switching to the decentralized mode communication path.
- the UE 10b may decide to switch the decentralized mode by including permission information indicating that the GO mode and the decentralized mode can be switched in the direct communication alert including the switch indicator.
- the permission information indicating that the UE 10b can switch between the GO mode and the decentralized mode transmitted from the ProSe application server or the ProSe Server 90 as a condition for transmitting a direct communication alert response to the direct communication alert including the switch indicator. (S1104 in FIG. 11) may be used for determination. Further, when the UE 10a manages that switching between the GO mode and the decentralized mode is possible, the UE 10a may transmit a direct communication alert response to the direct communication alert including the switch indicator.
- the UE 10a transmits a direct communication request to establish a decentralized mode communication path with the UE 10b (S3010).
- the direct communication request includes the direct communication ID indicating the communication path in the decentralized mode and the IP address of the UE 10a for transmitting and receiving data in the decentralized mode.
- the UE 10b receives the direct communication request from the UE 10a, and manages the direct communication ID and the IP address of the UE 10a included in the direct communication request.
- the UE 10b performs a security procedure for data transmission / reception with the UE-R 15 (S3012).
- the security procedure is to prevent data transmission / reception between the UE 10b and the UE 10a from being intercepted by another UE or UE-R. Since the method described in the first embodiment can be used in the same manner as the method for performing the security procedure, the detailed description thereof is omitted.
- the UE 10b detects that the security procedure has been completed and transmits a direct communication response (S3014), and the UE 10a receives the direct communication response from the UE 10b.
- the direct communication response includes the direct communication ID and the IP address of the UE 10b.
- the UE 10a receives the direct communication response and confirms that the direct communication path can be established in the UE 10b. Further, the UE 10a manages the direct communication ID and the IP address of the UE 10a in the decentralized mode communication path included in the direct communication response.
- the UE 10a and the UE 10b establish a radio bearer (S3016).
- the UE 10a notifies the UE 10b of communication resources for transmitting and receiving data on the communication path in the decentralized mode.
- the UE 10a that has established the decentralized mode communication path switches to the decentralized mode communication path (S3018).
- the UE 10a may switch only the data transmission / reception in the GO mode indicated by the UE identifier, the APN, or the PDN connection identifier notified to the UE 10b to the communication path in the decentralized mode.
- the UE 10a may switch only the data transmission / reception in the GO mode indicated by the UE identifier, the APN or the PDN connection identifier notified from the UE 10b to the communication path in the decentralized mode.
- the UE 10b that has established the decentralized mode communication path switches to the decentralized mode communication path (S3020).
- the UE 10b may switch only the data transmission / reception in the GO mode indicated by the UE identifier, the APN, or the PDN connection identifier notified to the UE 10a to the communication path in the decentralized mode.
- the UE 10b may switch only the data transmission / reception in the GO mode indicated by the UE identifier, the APN, or the PDN connection identifier notified from the UE 10a to the communication path in the decentralized mode.
- the UE 10a notifies the UE 10b of switching to the decentralized mode communication path, and the UE 10a and the UE 10b can establish the decentralized mode communication path.
- the UE 10a and the UE 10b may perform a communication path deletion procedure in the GO mode (S3022).
- the GO mode communication path deletion procedure can use the method described in the first embodiment, and a detailed description thereof will be omitted.
- the UE-R 15 may update RI (Routing Information, routing information) (S3024). That is, the UE-R 15 may manage so as not to transmit / receive data between the UE 10a and the UE 10b.
- RI Ring Information, routing information
- FIG. 31 shows an example of TFTs in the UE 10a, UE 10b, and UE-R 15 when a communication path in the decentralized mode is established.
- FIG. 31 shows an example of the TFT in the application 1. Here, only the example in the application 1 is shown, but the application 2 and the application 3 may be managed in the TFT.
- bearer ID 2a is a bearer ID indicating a communication path in the decentralized mode established by UE 10a with UE 10b and UE-R 15.
- the bearer ID 2a is managed in association with the direct communication ID 2ab with the UE 10b.
- the UE 10a When transmitting data in the application 1, the UE 10a indicates transmission to the UE 10b. As described above, the UE 10a can transmit and receive data in the application 1 on the communication path in the decentralized mode by managing the TFT.
- the UE 10a transmits to the UE 10b.
- bearer ID2b is bearer ID which shows the communication path in the decentralized mode which UE10b established with UE10a.
- the bearer ID 2b is managed in association with the direct communication ID 2ba with the UE 10a.
- the UE 10b can transmit and receive data in the application 1 on the communication path in the decentralized mode by managing the TFT.
- the UE 10b transmits to the UE 10a.
- the TFT in the UE-R 15 does not manage the communication path.
- each of the UE 10a, UE 10b, and UE-R 15 can switch from data transmission / reception in the GO mode communication path to data transmission / reception in the decentralized mode communication path.
- the procedure for switching from the communication path in the GO mode to the communication path in the decentralized mode has been described.
- the procedure for switching from the communication path in the decentralized mode to the communication path in the GO mode. Will be described.
- the first modification, the second embodiment, and the second modification, the UE-R 15 is included in the same group as the UE 10a and the UE 10b, but the fourth embodiment is different from the third embodiment.
- UE-R 15 is not included in the same group as UE 10a and UE 10b.
- the main processing flow in the fourth embodiment is the same as the method shown in the second embodiment, detailed description thereof is omitted.
- the UE 10a and the UE 10b perform a service registration procedure in advance, and a method similar to that in the first embodiment can be used as the method, and thus the description thereof is omitted.
- the UE-R 15 performs a service registration procedure in advance, and the method can be the same as that of the first embodiment, the description thereof is omitted. Further, since the UE 10a and the UE 10b can use the same method as that of the first embodiment in establishing the communication path in the decentralized mode, detailed description thereof is omitted. Note that the TFTs in the UE 10a and UE 10b in the case where the communication path in the decentralized mode is established can use the configuration described in the third embodiment in the same manner, and thus detailed description thereof is omitted.
- FIG. 32 shows a procedure for switching to the GO mode.
- the UE-R 15 performs an EPC connection procedure in advance (S3204).
- S3204 EPC connection procedure
- the UE-R 15 that has completed the connection procedure to the EPC transmits information about the GO mode to the UE 10a and the UE 10b (S3206), and the UE 10a and the UE 10b receive information about the GO mode from the UE-R 15. Since the information regarding the GO mode transmitted by the UE-R 15 is the same as that in the first embodiment, the detailed description thereof is omitted.
- the UE 10a detects that the communication path in the GO mode is available based on the information related to the GO mode (S3208).
- the UE-R 15 may be selected (S3210).
- FIG. 33 shows an example of a procedure selected by the UE-R 15. Note that the method of selecting the UE-R 15 is not limited to this, and other methods may be used.
- the UE 10a transmits a relay proximity detection request (S3302).
- This request includes group identification information.
- information indicating the group 1 to be switched is included. Note that when there are a plurality of UE-Rs 15 in the vicinity of the UE 10a, the UE 10a may transmit a relay proximity detection request to the plurality of UE-Rs 15.
- Each UE-R 15 that has received the relay proximity detection request performs proximity detection using the group identification information (S3304). Since the proximity detection performed here can use the method described in the first embodiment as it is, detailed description thereof is omitted. Note that the UE-R 15 counts the number of UEs belonging to a group existing in the vicinity of the UE-R 15.
- Each UE-R 15 transmits a relay proximity detection response to the UE 10a (S3308).
- the UE-R 15 notifies the group identification information and the number of detected UEs.
- the UE 10a that has received the relay proximity detection response from the UE-R 15 selects the UE-R 15 (S3312).
- selection is made based on the number of UEs detected by the UE-R 15. Alternatively, the selection may be made in consideration of the received power from the UE-R 15. Through the above procedure, the UE 10a can select GO.
- the UE 10b receives information on the GO mode from the UE-R 15 and detects the GO mode (S3209).
- the UE-R 15 may be selected (S3211).
- the procedure in which the UE 10b selects the UE-R 15 can use the same method as the procedure in which the UE 10a selects the UE-R 15 (S3210), and thus detailed description thereof is omitted.
- the UE 10a that has detected the GO mode selects the UE-R (S3210), and transmits a GO mode switching request to the UE 10b (S3212).
- the UE identifier may be included in the GO mode switching request.
- the UE 10a can indicate and switch data related to the UE identifier in a decentralized mode communication path that is a target of switching. For example, when the UE identifier indicating the UE 10a is included, the UE 10a can indicate data transmission / reception with the UE 10a to the UE 10b and switch data transmission / reception with the UE 10a.
- the description has been given here of including the UE identifier in the GO mode switching request as long as the message is transmitted from the UE 10a to the UE 10b, another message may be used instead of the GO mode switching request.
- the UE 10a may include the APN in the GO mode switching request.
- the UE 10a indicates data transmission / reception in the decentralized mode communication path established by the APN, and can switch the decentralized mode communication path corresponding to the APN.
- the APN is included in the GO mode switching request, but other messages may be used instead of the GO mode switching request.
- the UE 10a may include the PDN connection identifier in the GO mode switching request.
- the UE 10a indicates data transmission / reception in the decentralized mode communication path corresponding to the PDN connection identifier, and can switch the decentralized mode communication path corresponding to the PDN connection identifier.
- the PDN connection identifier is included in the GO mode switching request, but other messages may be used instead of the GO mode switching request.
- all data transmitted / received through the decentralized mode communication path may be detected as being switched to the decentralized mode communication path.
- the UE 10a may include permission information indicating that the GO mode and the decentralized mode can be switched in the GO mode switching request.
- the UE 10a transmits the GO mode switching request when the GO mode communication path has not been established (S3212). However, the UE 10a has established the GO mode communication path when the GO mode communication path is established. A mode switching request may be transmitted (S3212). That is, the GO mode switching request may be transmitted (S3212) after the GO mode communication path establishment procedure (S3220).
- the UE 10a may determine, as a condition for transmitting the GO mode switching request, permission information (S1104) indicating that switching between the GO mode and the decentralized mode transmitted from the ProSe application server or the ProSe Server 90 is possible. good.
- permission information S1104 indicating that switching between the GO mode and the decentralized mode transmitted from the ProSe application server or the ProSe Server 90 is possible.
- the UE 10a may transmit a GO mode switching request.
- the GO mode switching request may not be transmitted by the permission information (S1104) indicating that switching between the GO mode and the decentralized mode cannot be performed, which is transmitted from the ProSe application server or the ProSe Server 90.
- the UE 10a manages permission information indicating that switching between the GO mode and the decentralized mode cannot be performed, the UE 10a does not need to transmit a GO mode switching request.
- the UE 10b receives the GO mode switching request from the UE 10a. In response to the GO mode switching request, the UE 10b detects switching from the decentralized mode communication path to the GO mode communication path.
- the UE identifier when the UE identifier is included, it is detected that data transmission / reception corresponding to the UE identifier is switched.
- an APN When an APN is included, it is detected that data transmission / reception is switched in a communication path corresponding to the APN.
- the PDN connection identifier when the PDN connection identifier is included, it is detected that the transmission / reception of data on the communication path corresponding to the PDN connection identifier is switched.
- the UE 10b receives the GO mode switching request when the GO mode communication path has not been established (S3212). However, the UE 10b has the GO mode communication path established when the GO mode communication path is established. A mode switching request may be received (S3212). That is, the GO mode switching request may be received (S3212) after the GO mode communication path establishment procedure (S3220).
- the GO mode communication path establishment procedure (S3220) has been described in the first embodiment, and a description thereof will be omitted.
- the UE 10b may determine the switching of the GO mode by including permission information indicating that the GO mode and the decentralized mode can be switched in the GO mode switching request.
- the UE 10b decides to switch the GO mode based on permission information (S1104 in FIG. 11) indicating that switching between the GO mode and the decentralized mode transmitted from the ProSe application server or the ProSeServer 90 can be performed. You may do it. If the UE 10b manages permission information indicating that the GO mode and the decentralized mode can be switched, the UE 10b may determine to switch the GO mode.
- permission information S1104 in FIG. 11
- the UE 10b does not switch the GO mode based on the permission information (S1104 in FIG. 11) indicating that switching between the GO mode and the decentralized mode transmitted from the ProSe application server or the ProSeServer 90 cannot be performed. May be determined. If the UE 10b manages permission information indicating that switching between the GO mode and the decentralized mode cannot be performed, the UE 10b may determine not to switch the GO mode. UE10b which detected switching to the communication path of GO mode transmits the switching response of GO mode to UE10a (S3214).
- the UE 10b may include permission information indicating that the GO mode and the decentralized mode can be switched in the GO mode switching response.
- the UE 10b may include permission information indicating that the GO mode and the decentralized mode can be switched in the GO mode switching response.
- the UE 10b may indicate that the GO mode and the decentralized mode can be switched by not including permission information indicating that the GO mode and the decentralized mode can be switched in the GO mode switching response.
- the UE 10b transmits a GO mode switching response when the GO mode communication path has not been established (S3214), but the UE 10b has established the GO mode communication path when the GO mode communication path is established.
- a mode switching response may be transmitted (S3214). That is, the GO mode switching response may be transmitted (S3214) after the GO mode communication path establishment procedure (S3220).
- the UE 10b determines, as a condition for transmitting the GO mode switching response, permission information (S1104 in FIG. 11) indicating that the GO mode and the decentralized mode can be switched from the ProSe application server or the ProSe Server 90. You may do it. Moreover, when managing permission information indicating that the UE 10b can switch between the GO mode and the decentralized mode, the UE 10b may transmit a GO mode switching response.
- the GO mode switching response is not transmitted by the permission information (S1104 in FIG. 11) indicating that the switching between the GO mode and the decentralized mode cannot be performed, which is transmitted from the ProSe application server or the ProSe Server 90. Also good.
- the UE 10a manages permission information indicating that switching between the GO mode and the decentralized mode cannot be performed, the UE 10a does not need to transmit a GO mode switching response.
- the UE 10a receives the GO mode switching response from the UE 10b. By this response, the UE 10a detects that the UE 10b has detected switching to the communication path in the GO mode.
- the UE 10a receives the GO mode switching response when the GO mode communication path has not been established (S3214).
- the UE 10b has the GO mode communication path established when the GO mode communication path is established.
- a mode switching response may be received (S3214). That is, the GO mode switching response may be received (S3214) after the GO mode communication path establishment procedure (S3220).
- the GO mode communication path establishment procedure (S3220) has been described in the first embodiment, and a description thereof will be omitted.
- the UE 10a may determine, as a condition for detecting GO mode switching, a notification (S1104 in FIG. 11) indicating that switching between the GO mode and the decentralized mode transmitted from the ProSe application server can be performed. Further, the UE 10a manages that the GO mode and the decentralized mode can be switched, and when the GO mode and the decentralized mode can be switched, the switching of the GO mode may be detected.
- a notification S1104 in FIG. 11
- the UE 10a does not switch the GO mode based on the permission information (S1104 in FIG. 11) indicating that switching between the GO mode and the decentralized mode transmitted from the ProSe application server or the ProSe Server 90 cannot be performed. You may decide that. If the UE 10a manages permission information indicating that switching between the GO mode and the decentralized mode cannot be performed, the UE 10a may determine not to switch the GO mode. Further, the UE 10a may decide to switch the GO mode by including permission information indicating that the GO mode and the decentralized mode can be switched in the GO mode switching response.
- the permission information S1104 in FIG. 11
- the UE 10a may determine not to switch the GO mode by including permission information indicating that the GO mode and the decentralized mode cannot be switched in the GO mode switching response. . Further, the UE 10a may determine not to switch the GO mode because the permission information indicating that the GO mode and the decentralized mode can be switched is not included in the GO mode switching response.
- the UE 10b that has detected the GO mode may transmit a GO mode switching request to the UE 10a (S3216).
- the UE identifier may be included in the GO mode switching request.
- the UE 10b may indicate the transmission / reception of data related to the UE identifier in the decentralized mode communication path that is the switching source, and may switch the data.
- the message may be another message instead of the GO mode switching request.
- the UE 10b may include the APN in the GO mode switching request.
- the UE 10b may indicate data transmission / reception in the decentralized mode communication path established by the APN, and may switch the decentralized mode communication path corresponding to the APN.
- the message may be another message instead of the GO mode switching request.
- the UE 10b When the UE 10b receives the GO mode switching request from the UE 10a (S3212) before transmitting the GO mode switching request (S3216) to the UE 10a, the GO mode switching request may not be transmitted (S3216).
- the UE 10b may include permission information indicating that the GO mode and the decentralized mode can be switched in the GO mode switching request.
- the UE 10a When the UE 10b transmits a GO mode switching request to the UE 10a, the UE 10a receives the GO mode switching request from the UE 10b. In response to the GO mode switching request, the UE 10a detects switching from the decentralized mode communication path to the GO mode communication path.
- the UE identifier when the UE identifier is included, it is detected that data transmission / reception corresponding to the UE identifier is switched.
- an APN When an APN is included, it is detected that data transmission / reception is switched in a communication path corresponding to the APN.
- the PDN connection identifier when the PDN connection identifier is included, it is detected that the transmission / reception of data on the communication path corresponding to the PDN connection identifier is switched.
- the UE 10a receives the GO mode switching request when the GO mode communication path is not established (S3216), but the UE 10a is configured to receive the GO mode communication path when the GO mode communication path is established.
- a mode switching request may be received (S3216). That is, the GO mode switching request may be received (S3216) after the GO mode communication path establishment procedure (S3220). Note that the GO mode communication path establishment procedure (S3220) including the request for switching to the GO mode will be described in detail later, and thus the description thereof will be omitted.
- the UE 10a may decide to switch the GO mode by including permission information indicating that the GO mode and the decentralized mode can be switched in the GO mode switching request.
- the UE 10a may determine to switch the GO mode.
- the UE 10a does not switch the GO mode based on the permission information (S1104 in FIG. 11) indicating that the switching between the GO mode and the decentralized mode transmitted from the ProSe application server or the ProSeServer 90 cannot be performed. May be determined. If the UE 10a manages permission information indicating that switching between the GO mode and the decentralized mode cannot be performed, the UE 10a may determine not to switch the GO mode.
- the permission information S1104 in FIG. 11
- the UE 10a that has decided to switch to the communication path in the GO mode may transmit a GO mode switching response to the UE 10b (S3218).
- the UE 10a When the UE 10a transmits a GO mode switching response to the UE 10b, the UE 10a receives the GO mode switching response from the UE 10b. By this response, the UE 10b detects that the UE 10a has detected switching to the communication path in the GO mode.
- the UE 10a When the UE 10a receives the GO mode switching response from the UE 10b (S3212) before transmitting the GO mode switching response (S3218) to the UE 10b, the UE 10a does not need to transmit the GO mode switching response to the UE 10b (S3218). good.
- the UE 10a may include permission information indicating that the GO mode and the decentralized mode can be switched in the GO mode switching response.
- the UE 10b may include permission information indicating that the GO mode and the decentralized mode can be switched in the GO mode switching response.
- the UE 10a may indicate that the GO mode and the decentralized mode can be switched by not including permission information indicating that the GO mode and the decentralized mode can be switched in the GO mode switching response.
- the UE 10a transmits the GO mode switching response when the GO mode communication path has not been established (S3218). However, the UE 10a has established the GO mode communication path when the GO mode communication path is established. A mode switching response may be transmitted (S3218). That is, after the GO mode communication path establishment procedure (S3220), the GO mode switching response may be transmitted (S3218). Note that the GO mode communication path establishment procedure (S3220) including the request for switching to the GO mode can use the method described in the first embodiment, and thus the description thereof is omitted.
- the UE 10a uses the permission information (S1104 in FIG. 11) indicating that the GO mode and the decentralized mode can be switched from the ProSe application server or the ProSe Server 90 as a condition for transmitting the GO mode switching response. You may judge. Moreover, when managing permission information indicating that the UE 10b can switch between the GO mode and the decentralized mode, the UE 10b may transmit a GO mode switching response.
- the GO mode switching response is not transmitted by the permission information (S1104 in FIG. 11) indicating that the switching between the GO mode and the decentralized mode cannot be performed, which is transmitted from the ProSe application server or the ProSe Server 90. Also good.
- the UE 10b manages permission information indicating that switching between the GO mode and the decentralized mode cannot be performed, the UE 10b does not need to transmit a GO mode switching response.
- the UE 10b receives the GO mode switching response when the GO mode communication path is not established (S3218). However, the UE 10b is configured to receive the GO mode communication path when the GO mode communication path is established.
- a mode switching response may be received (S3218). That is, the GO mode switching response may be received (S3218) after the GO mode communication path establishment procedure including the GO mode switching request (S3220).
- the GO mode communication path establishment procedure (S3220) including the request for switching to the GO mode can use the method described in the first embodiment, and thus the description thereof is omitted.
- the UE 10b may determine, as a condition for detecting switching of the GO mode, a notification (S1104 in FIG. 11) indicating that switching between the GO mode and the decentralized mode transmitted from the ProSe application server can be performed. Further, the UE 10b manages that the GO mode and the decentralized mode can be switched, and when the GO mode and the decentralized mode can be switched, the switching of the GO mode may be detected.
- a notification S1104 in FIG. 11
- the UE 10b does not switch the GO mode based on the permission information (S1104 in FIG. 11) indicating that switching between the GO mode and the decentralized mode transmitted from the ProSe application server or the ProSe Server 90 cannot be performed. You may decide that. If the UE 10b manages permission information indicating that switching between the GO mode and the decentralized mode cannot be performed, the UE 10b may determine not to switch the GO mode.
- the permission information S1104 in FIG. 11
- the UE 10b may determine the switching of the GO mode by including permission information indicating that the GO mode and the decentralized mode can be switched in the GO mode switching request. Note that the UE 10b may determine not to switch the GO mode by including permission information indicating that the GO mode and the decentralized mode cannot be switched in the GO mode switching request. . Further, the UE 10b may determine not to switch the GO mode because the permission information indicating that the GO mode and the decentralized mode can be switched is not included in the GO mode switching request.
- the UE 10a and the UE 10b that have received the GO mode switching request or the GO mode switching response perform a GO mode communication path establishment procedure (S3220). Since the procedure shown in the first embodiment can be used for the GO mode communication path establishment procedure, a detailed description thereof will be omitted.
- the UE 10a has permission information (S1104 in FIG. 11) indicating that it is possible to switch between the GO mode and the decentralized mode transmitted from the ProSe application server or ProSe Server 90 as a condition for performing the GO mode communication path establishment procedure. You may judge by. In addition, the UE 10a manages that the GO mode and the decentralized mode can be switched, and manages the permission information indicating that the GO mode and the decentralized mode can be switched. You can go.
- permission information S1104 in FIG. 11
- the GO mode communication path establishment procedure is not performed by the permission information (S1104 in FIG. 11) indicating that switching between the GO mode and the decentralized mode transmitted from the ProSe application server or ProSe Server 90 cannot be performed. May be.
- the UE 10a manages permission information indicating that switching between the GO mode and the decentralized mode cannot be performed, the GO mode communication path establishment procedure may not be performed.
- the UE 10a may perform a GO mode communication path establishment procedure by receiving a GO mode switching response from the UE 10b (S3214).
- the UE 10a may perform the GO mode communication path establishment procedure by including permission information indicating that the GO mode and the decentralized mode can be switched in the GO mode switching response.
- the UE 10a does not need to perform the GO mode communication path establishment procedure because the permission information indicating that the GO mode and the decentralized mode cannot be switched is included in the GO mode switching response.
- the UE 10a since the permission information indicating that the GO mode and the decentralized mode can be switched is not included in the GO mode switching response, the UE 10a may not perform the GO mode communication path establishment procedure.
- the UE 10a may perform a GO mode communication path establishment procedure by receiving a GO mode switching request from the UE 10b (S3216). Further, since the UE 10a includes permission information indicating that the GO mode and the decentralized mode can be switched in the GO mode switching request, it is not necessary to perform the GO mode communication path establishment procedure.
- the GO mode communication path establishment procedure is not performed. Also good.
- the UE 10b manages permission information indicating that switching between the GO mode and the decentralized mode cannot be performed, the GO mode communication path establishment procedure may not be performed.
- the UE 10b may perform a GO mode communication path establishment procedure by receiving a GO mode switching response from the UE 10a (S3218).
- the UE 10b may perform the GO mode communication path establishment procedure by including permission information indicating that the GO mode and the decentralized mode can be switched in the GO mode switching response.
- the UE 10b does not have to perform the GO mode communication path establishment procedure because the permission information indicating that the GO mode and the decentralized mode cannot be switched is included in the GO mode switching response.
- the UE 10b since the permission information indicating that the GO mode and the decentralized mode can be switched is not included in the GO mode switching response, the UE 10b may not perform the GO mode communication path establishment procedure.
- the UE 10b may perform a GO mode communication path establishment procedure by receiving a GO mode switching request from the UE 10a (S3216). Further, since the UE 10b includes permission information indicating that the GO mode and the decentralized mode can be switched in the GO mode switching request, it is not necessary to perform the GO mode communication path establishment procedure.
- the UE-R 15 that has established the communication path in the GO mode with the UE 10a and the UE 10b by the GO mode communication path establishment procedure updates the RI (S3222).
- the UE-R 15 transmits the data transmitted from the UE 10a to the eNB 20 by updating the RI, the eNB 20 transmits the data received from the UE-R 15 to the SGW 40, the SGW 40 transmits the data received from the eNB 20 to the PGW 50, and the PGW 50 Transmits the data received from the SGW 40 to the PDN 80.
- the data transmitted from the PDN 80 to the UE 10a is received from the PDN 80 to the PGW 50, the PGW 80 transmits the data received from the PDN 80 to the SGW 40, the SGW 40 transmits the data received from the PGW 50 to the eNB 20, and the eNB 20
- the data received from the SGW 40 is transmitted to the UE-R 15, and the UE-R 15 transmits the data received from the eNB 20 to the UE 10a.
- the UE-R 15 transmits the data transmitted from the UE 10b to the eNB 20 by the RI update
- the eNB 20 transmits the data received from the UE-R 15 to the SGW 40
- the SGW 40 transmits the data received from the eNB 20 to the PGW 50
- PGW 50 transmits the data received from SGW 40 to PDN 80.
- the data transmitted from the PDN 80 to the UE 10b is received from the PDN 80 to the PGW 50, the PGW 80 transmits the data received from the PDN 80 to the SGW 40, the SGW 40 transmits the data received from the PGW 50 to the eNB 20, and the eNB 20
- the data received from the SGW 40 is transmitted to the UE-R 15, and the UE-R 15 transmits the data received from the eNB 20 to the UE 10b.
- the UE10a which performed the communication path establishment procedure of GO mode switches to the communication path of GO mode (S3224).
- the UE 10a may switch only the transmission / reception of data in the decentralized mode indicated by the UE identifier, the APN, or the PDN connection identifier notified to the UE 10b to the communication path in the GO mode.
- the UE 10a may switch only the data transmission / reception in the decentralized mode indicated by the UE identifier, the APN, or the PDN connection identifier notified from the UE 10b to the communication path in the GO mode.
- the UE10b which performed the communication path establishment procedure of GO mode switches to the communication path of GO mode (S3226).
- the UE 10b may switch only the data transmission / reception in the decentralized mode indicated by the UE identifier, the APN, or the PDN connection identifier notified to the UE 10a to the communication path in the GO mode.
- the UE 10b may switch only the data transmission / reception in the decentralized mode indicated by the UE identifier, the APN, or the PDN connection identifier notified from the UE 10a to the communication path in the GO mode.
- the UE 10a and the UE 10b that have switched to the communication path in the GO mode may delete the communication path in the decentralized mode (S3228).
- the decentralized mode communication path deletion procedure can use the method described in the third embodiment, and thus a detailed description thereof will be omitted.
- the TFTs in the UE 10a, UE 10b, and UE-R 15 when the communication path in the GO mode is established can use the configuration described in the third embodiment in the same manner, and thus detailed description thereof is omitted.
- the UE 10a, the UE 10b, and the UE-R 15 can switch from data transmission / reception in the decentralized mode communication path to data transmission / reception in the GO mode communication path.
- the GO mode communication path is switched by the communication path establishment procedure including the GO mode switching request.
- the GO mode switching request is issued.
- the switching procedure may be performed in the communication path deletion procedure in the decentralized mode.
- the main processing flow in Modification 3 can use the method shown in the second embodiment in the same manner, detailed description thereof will be omitted.
- the UE 10a and the UE 10b perform a service registration procedure in advance, and a method similar to that in the first embodiment can be used as the method, and thus the description thereof is omitted.
- the UE 10a, UE 10b, and UE-R 15 can use the same method as in the first embodiment for establishing a communication path in the decentralized mode, detailed description thereof is omitted.
- the TFTs in the UE 10a, UE 10b, and UE-R 15 when establishing a communication path in the decentralized mode can use the configuration described in the first embodiment in the same manner, and thus detailed description thereof is omitted.
- FIG. 34 shows a procedure for switching to the GO mode.
- the UE-R 15 performs an EPC connection procedure in advance (S3404).
- S3404 EPC connection procedure
- the UE-R 15 that has completed the connection procedure to the EPC transmits information on the GO mode to the UE 10a and the UE 10b (S3406), and the UE 10a and the UE 10b receive information on the GO mode from the UE-R 15. Since the information regarding the GO mode transmitted by the UE-R 15 is the same as that in the first embodiment, the detailed description thereof is omitted.
- the UE 10a detects that the communication path in the GO mode is available based on the information related to the GO mode (S3408).
- the UE-R 15 may be selected (S3412). Since the procedure for selecting the UE-R 15 by the UE 10a can use the method described in the fourth embodiment, the detailed description thereof is omitted.
- the UE 10b receives information on the GO mode from the UE-R 15, and detects the GO mode (S3410).
- the UE 10b detects that the communication path in the GO mode is available from the plurality of UE-Rs 15, the UE 10R 15 may be selected (S3414). Since the procedure for selecting the UE-R 15 by the UE 10b can use the method described in the fourth embodiment, the detailed description thereof is omitted.
- the UE 10a that has detected the GO mode (S3408) performs a GO mode communication path establishment procedure (S3416). Note that since the GO mode communication path establishment procedure can use the method described in the first embodiment, a detailed description thereof will be omitted.
- the UE 10a uses the permission information (S1104 in FIG. 11) indicating that the GO mode and the decentralized mode can be switched from the ProSe application server or the ProSe Server 90 as a condition for performing the communication path establishment procedure in the GO mode. You may judge.
- the UE 10a may perform a GO mode communication path establishment procedure.
- the GO mode communication path establishment procedure is not performed by the permission information (S1104 in FIG. 11) indicating that switching between the GO mode and the decentralized mode transmitted from the ProSe application server or ProSe Server 90 cannot be performed. May be.
- the UE 10a manages permission information indicating that switching between the GO mode and the decentralized mode cannot be performed, the GO mode communication path establishment procedure may not be performed.
- the UE 10b that has detected the GO mode (S3410) performs a GO mode communication path establishment procedure (S3416). Note that since the GO mode communication path establishment procedure can use the method described in the first embodiment, a detailed description thereof will be omitted.
- the UE-R 15 detects that the communication path in the GO mode has been established with the UE 10a and the UE 10b, and updates the RI (S3418).
- the method shown in 4th Embodiment can be utilized for the update of RI, the detailed description is abbreviate
- the UE 10a that has established the communication path in the GO mode transmits a direct communication disconnection request to the UE 10b (S3420).
- the direct communication disconnection request may include a UE identifier.
- the UE 10a can indicate and switch data related to the UE identifier in a decentralized mode communication path that is a target of switching. For example, when the UE identifier indicating the UE 10a is included, the UE 10a can indicate data transmission / reception with the UE 10a to the UE 10b and switch data transmission / reception with the UE 10a.
- the UE identifier is included in the direct communication disconnection request.
- another message may be used instead of the direct communication disconnection request.
- the UE 10a may include the APN in the direct communication disconnection request.
- the UE 10a indicates data transmission / reception in the decentralized mode communication path established by the APN, and can switch the decentralized mode communication path corresponding to the APN.
- the APN is included in the GO mode switching request, but other messages may be used instead of the GO mode switching request.
- the UE 10a may include the PDN connection identifier in the direct communication disconnection request.
- the UE 10a indicates data transmission / reception in the decentralized mode communication path corresponding to the PDN connection identifier, and can switch the decentralized mode communication path corresponding to the PDN connection identifier.
- the PDN connection identifier is included in the direct communication disconnection request, but other messages may be used instead of the direct communication disconnection request.
- all data transmitted / received through the decentralized mode communication path may be detected as being switched to the decentralized mode communication path.
- the UE 10a transmits a direct communication disconnection request including a switch indicator when the GO mode communication path is established (S3420), but the UE 10a does not establish the GO mode communication path.
- a direct communication disconnection request including a switch indicator may be transmitted. That is, the GO mode communication path establishment procedure (S3416) may be performed after the direct communication disconnection request is transmitted (S3420).
- the UE 10a uses permission information (S1104 in FIG. 11) indicating that the GO mode and the decentralized mode can be switched from the ProSe application server as a condition for transmitting a direct communication disconnection request including a switch indicator. You may judge. Further, the UE 10a manages that the GO mode and the decentralized mode can be switched. If the GO mode and the decentralized mode can be switched, the UE 10a may transmit a direct communication disconnection request including the switch indicator.
- permission information S1104 in FIG. 11
- the direct communication disconnection request response including the switch indicator is received by the permission information (S1104 in FIG. 11) indicating that the switching between the GO mode and the decentralized mode transmitted from the ProSe application server or the ProSe Server 90 cannot be performed. You do not have to send it.
- the UE 10a manages permission information indicating that switching between the GO mode and the decentralized mode cannot be performed, the UE 10a does not have to transmit a direct communication disconnection request including a switch indicator.
- the UE 10a may include permission information indicating that the GO mode and the decentralized mode can be switched in the GO mode switching request. Further, when the UE identifier is included, it is detected that the transmission / reception of data corresponding to the UE identifier is switched. When an APN is included, it is detected that data transmission / reception is switched in a communication path corresponding to the APN. In addition, when the PDN connection identifier is included, it is detected that the transmission / reception of data on the communication path corresponding to the PDN connection identifier is switched.
- the UE 10b that has detected switching to the communication path in the GO mode switches transmission / reception of data in the communication path in the decentralized mode to the communication path in the established GO mode (S3422).
- UE10b which switched transmission / reception of data to the communication path of GO mode transmits a communication disconnection response directly to UE10a (S3424), and UE10a receives a communication disconnection response directly from UE10b. By this response, the UE 10a detects that the UE 10b has switched to the communication path in the GO mode.
- the UE 10b when the UE 10b has established the communication path in the GO mode, the UE 10b transmits a direct communication disconnection response that is a response to the direct communication disconnection request including the switch indicator (S3424).
- a direct communication disconnection response that is a response to the direct communication disconnection request including the switch indicator may be transmitted (S3424). That is, the communication disconnection response may be transmitted directly (S3424) after the GO mode communication path establishment procedure (S3416).
- the UE 10b can also determine whether or not it is possible to switch between the GO mode and the decentralized mode transmitted from the ProSe application server as a condition for transmitting a direct communication disconnection response based on permission information (S1104 in FIG. 11). good. Further, the UE 10b manages that the GO mode and the decentralized mode can be switched. If the GO mode and the decentralized mode can be switched, the UE 10b may directly transmit a communication disconnection response.
- the UE 10b since the UE 10b includes permission information indicating that the GO mode and the decentralized mode can be switched in the direct communication disconnection request, the UE 10b determines to switch to the communication path in the GO mode, and receives a direct communication disconnection response. May be sent.
- the UE 10b that has decided to switch to the communication path in the GO mode transmits a communication disconnection response directly to the UE 10a (S3424).
- the UE 10b may include permission information indicating that the GO mode and the decentralized mode can be switched in the GO mode switching response.
- the UE 10b may include permission information indicating that the GO mode and the decentralized mode can be switched in the GO mode switching response.
- the UE 10b may indicate that the GO mode and the decentralized mode can be switched by not including permission information indicating that the GO mode and the decentralized mode can be switched in the GO mode switching response.
- the UE 10a receives a communication disconnection response directly from the UE 10b.
- the UE 10a detects that the UE 10b has detected switching to the communication path in the GO mode. Further, the UE 10a may determine the switching of the GO mode by including permission information indicating that the GO mode and the decentralized mode can be switched in the direct communication disconnection response. Note that the UE 10a may determine not to switch the GO mode by including permission information indicating that the GO mode and the decentralized mode cannot be switched in the direct communication disconnection response. Further, the UE 10a may determine not to switch the GO mode because the permission information indicating that the GO mode and the decentralized mode can be switched is not included in the direct communication disconnection response.
- the UE 10a may switch the transmission / reception of data on the communication path in the decentralized mode to the communication path in the GO mode (S3428). Further, the UE 10a may include permission information indicating that the GO mode and the decentralized mode can be switched in the GO mode switching request.
- the UE 10b that has performed the GO mode communication path establishment procedure may directly transmit a communication disconnection request to the UE 10a (S3426).
- the direct communication disconnection request may include a UE identifier.
- the UE 10b may indicate the transmission / reception of data related to the UE identifier in the decentralized mode communication path that is the switching source, and may switch the data.
- it may be another message instead of a direct communication disconnection request.
- the UE 10b may include the APN in the direct communication disconnection request.
- the UE 10b may indicate data transmission / reception in the decentralized mode communication path established by the APN, and may switch the decentralized mode communication path corresponding to the APN.
- it may be another message instead of a direct communication disconnection request.
- the direct communication disconnection request may not be transmitted (S3426).
- the UE 10a When the UE 10b transmits a direct communication disconnection request to the UE 10a, the UE 10a receives the direct communication disconnection request from the UE 10b.
- the UE 10a detects switching from the decentralized mode communication path to the GO mode communication path by direct communication disconnection. Further, the UE 10a may determine switching to the communication path in the GO mode by including permission information indicating that the GO mode and the decentralized mode can be switched in the direct communication disconnection request.
- the UE identifier when the UE identifier is included, it is detected that data transmission / reception corresponding to the UE identifier is switched.
- an APN When an APN is included, it is detected that data transmission / reception is switched in a communication path corresponding to the APN.
- the PDN connection identifier when the PDN connection identifier is included, it is detected that the transmission / reception of data on the communication path corresponding to the PDN connection identifier is switched.
- the UE 10a that has received the direct communication disconnection request may switch the transmission / reception of data in the decentralized mode communication path to the established GO mode communication path (S3428).
- the UE 10a may transmit a communication disconnection response directly to the UE 10b (S3430).
- the UE 10a transmits a direct communication disconnection response to the UE 10b
- the UE 10a receives the direct communication disconnection response from the UE 10b.
- the UE 10b may detect that the UE 10a has switched to the communication path in the GO mode.
- the TFTs in the UE 10a, UE 10b, and UE-R 15 when the communication path in the GO mode is established can use the configuration described in the third embodiment in the same manner, and thus detailed description thereof is omitted.
- the UE 10a, the UE 10b, and the UE-R 15 can switch from data transmission / reception in the decentralized mode communication path to data transmission / reception in the GO mode communication path.
- the first embodiment to the fourth embodiment and the first modification to the fourth modification are shown, and the communication path in the decentralized mode is switched from the communication path in the GO mode or the communication path in the GO mode is changed to the decentralized mode. It explained that it can be switched to the communication path.
- the relay terminal device establishes a first communication path in a first mode in which data transmitted from the terminal device is transferred to the base station device, and data transmitted from the base station device is transferred to the terminal device,
- data transmission / reception is switched to the second communication path in the second mode in which data is directly transmitted to / from a terminal apparatus existing in the vicinity of the relay terminal apparatus during data transmission / reception in the first communication path in the first mode
- a request message for requesting switching to the second communication path in the second mode including information indicating switching to the second communication path in the second mode to the terminal device
- a response message to the request message to be requested is received, the second communication path in the second mode is established, and the data of the first communication path in the first mode is established. It is possible to switch the transmission and reception of the second communication path in the second mode.
- the relay terminal device establishes a second communication path in the second mode in which data is directly transmitted to a terminal device existing in the vicinity of the relay terminal apparatus, and data is being transmitted / received in the second communication path in the second mode.
- a request message for requesting switching to the first communication path in the first mode including information indicating switching to the first communication path in one mode, to the terminal apparatus, and a request for switching from the terminal apparatus
- Receives a response message to the message establishes the first communication channel in the first mode, and transmits / receives data on the second communication channel in the second mode It can be switched to the first channel in the first mode.
- the request message for requesting switching may include information for identifying a terminal device or a relay terminal device or information indicating a connection destination.
- the terminal device establishes a second communication path in the second mode in which data is directly transmitted with a relay terminal apparatus that exists in the vicinity of the terminal device, and during data transmission / reception in the second communication path in the second mode
- information indicating switching to the first communication path in the first mode is included.
- a request message for requesting switching to the first communication path in one mode is transmitted to the relay terminal device, a response message to the request message requesting switching is received from the relay terminal device, and the first message in the first mode is received.
- the terminal device establishes a first communication channel in the first mode for transmitting data via a relay terminal device existing in the vicinity of the terminal device, and transmits / receives data in the first communication channel in the first mode
- a request message for requesting switching to the second communication path in the second mode including information is transmitted to the second terminal device, and a response message to the request message for requesting switching is received from the second terminal device.
- Establishing the second communication channel in the second mode and switching the transmission / reception of the data in the first communication channel in the first mode to the second communication channel in the second mode It is possible.
- the terminal device establishes a second communication channel in the second mode in which data is directly transmitted to a second terminal device existing in the vicinity of the terminal device, and transmits / receives data in the second communication channel in the second mode
- a request message for requesting switching to the first communication path in the first mode including information is transmitted to the second terminal device, and a response message to the request message for requesting switching is received from the second terminal device.
- the request message for requesting switching may be a request message for requesting establishment of a communication path.
- the request message for requesting switching may be a request message for requesting deletion of the communication path.
- the request message for requesting switching may include information for identifying the terminal device or the relay terminal device or information indicating the connection destination.
- a program that operates in each device is a program that controls a CPU or the like (a program that causes a computer to function) so as to realize the functions of the above-described embodiments.
- Information handled by these devices is temporarily stored in a temporary storage device (for example, RAM) at the time of processing, then stored in various ROM or HDD storage devices, and read and corrected by the CPU as necessary. • Writing is performed.
- a recording medium for storing the program a semiconductor medium (for example, ROM, a non-volatile memory card, etc.), an optical recording medium / a magneto-optical recording medium (for example, DVD (Digital Versatile Disc), MO (Magneto Optical) Disc), MD (Mini Disc), CD (Compact Disc), BD, etc.), magnetic recording medium (eg, magnetic tape, flexible disk, etc.), etc.
- a semiconductor medium for example, ROM, a non-volatile memory card, etc.
- an optical recording medium / a magneto-optical recording medium for example, DVD (Digital Versatile Disc), MO (Magneto Optical) Disc), MD (Mini Disc), CD (Compact Disc), BD, etc.
- magnetic recording medium eg, magnetic tape, flexible disk, etc.
- the program when distributing to the market, can be stored in a portable recording medium for distribution, or transferred to a server computer connected via a network such as the Internet.
- a server computer connected via a network such as the Internet.
- the storage device of the server computer is also included in the present invention.
- each device in the above-described embodiment may be realized as an LSI (Large Scale Integration) which is typically an integrated circuit.
- LSI Large Scale Integration
- Each functional block of each device may be individually formed as a chip, or a part or all of them may be integrated into a chip.
- the method of circuit integration is not limited to LSI, and may be realized by a dedicated circuit or a general-purpose processor.
- integrated circuit technology that replaces LSI appears due to progress in semiconductor technology, it is of course possible to use an integrated circuit based on this technology.
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Abstract
Description
まず、本発明を適用した第1実施形態について、図面を参照して説明する。
図1は、本実施形態における移動通信システム1の概略を説明するための図である。図1(a)に示すように、移動通信システム1は、UE((端末装置)UE10aとUE10b)と、UE-R(リレー端末装置)15と、PDN(Packet Data Network)80とがIP移動通信ネットワーク5を介して接続されて構成されている。PDN80には、ProSe Server90が接続されている。UE10aとUE-R15は近隣に位置し、LTE(D)を介して接続することができる。UE10bとUE-R15は近隣に位置し、LTE(D)を介して接続することができる。なお、UE10aとUE10bとは、同様の装置であり、UE10と記載した場合は、UE10a又はUE10bのいずれにも該当することとして以下説明する。
GCSE ASは、グループ通信を行うためのアプリケーションに関連する制御情報や識別情報を管理し、必要に応じて、UE10やUE-R15に制御情報や識別情報を通知するサーバである。
図1に示すように、移動通信システム1は、UE10と、UE-R15と、IP移動通信ネットワーク5と、PDN80(Packet Data Network)とから構成される。また、UE-R15にはUE10a、UE10bのように、複数の通信端末が接続されてよい。これらの通信端末はUE10と構成が同じである。さらに、IP移動通信ネットワーク5には、UE-R15以外にも複数のリレー機能を有する端末装置を接続することができる。こうした端末装置はUE-Rと構成が同じであり、図面の簡略化のため記載を省略する。
続いて、各装置構成について図を用いて簡単に説明する。
図3を基に本実施形態におけるUE10の機能構成を示す。なお、UE10は、UE10a、UE10bにおいても同様の構成である。UE10は、制御部100に、第1インタフェース部110と、第2インタフェース部120と、記憶部140とがバスを介して接続されている。
図5に本実施形態におけるUE-R15の機能構成を示す。UE-R15は、制御部1500に、第1インタフェース部1510と第2インタフェース部1520と、データ転送部1530と、記憶部1540とがバスを介して接続されている。
図7をもとに本実施形態におけるeNB20の機能構成を示す。eNB20は、制御部200に、第1インタフェース部210と、第2インタフェース部220と、データ転送部230と、記憶部240とがバスを介して接続されている。
MME30は、UE10の通信路確立やサービス提供に関して、許可または不許可を決定する位置管理装置である。
Serverを記憶しても良いし、ProSe Serverがサービスを提供する端末装置を記憶しても良い。
ProSe Server90は、UE-R15やUE10に直接通信路の確立や近隣端末の検出等のサービスを提供するサーバ装置である。
続いて、上述した移動通信システムにおける具体的な処理の実施例について説明する。
図11にUE10aまたはUE10bにおけるサービス登録手続きを示す。ここで、UE10aはアプリケーション1において、ProSeアプリケーションサーバにサービス登録手続きを行うこととする。なお、UE10aはアプリケーション1に関わらず、他のアプリケーション2であっても良く、アプリケーション3であっても良い。
UE-R15におけるネットワークへの接続手続きとサービス登録手続きについて説明する。図12に、UE-R15におけるネットワークへの登録手続きとサービス登録手続きを示す。
GOモードにおける通信路確立手続きについて説明する。図13に、GOモードにおける通信路確立手続きを示す。
図14にGOモードにおける通信路を確立した場合のUE10a、UE10b、UE-R15におけるTFTの例を示す。図14では、アプリケーション1におけるTFTの例を示している。ここで、アプリケーション1における例のみを示しているが、TFTにおいて、アプリケーション2やアプリケーション3が管理されても良い。
デセントラライズモードへの切り替え手続きについて説明する。図15に、デセントラライズモードへの切り替え手続きを示す。なお、デセントラライズモードへの切り替えは、GOモードの通信路においてデータの送受信中に行われる。
続いて、UE-R15はデセントラライズモードへの切り替え要求を含む通信路確立手続きを行う(S1504)。図16に、デセントラライズモードへの切り替え要求を含む通信路確立手続きの例を示す。なお、デセントラライズモードへの切り替え要求を含む通信路確立手続きであれば、本手続きでなくても良い。
えることとして検出させても良い。
GOモードの通信路削除手続きを説明する。図17に、GOモードの通信路削除手続きの例を示す。なお、GOモードの通信路削除手続きであれば、本手続きでなくても良い。UE10aはUE-R15にデタッチ要求を送信する(S1704)。ここで送信するデタッチ要求は従来UEがeNB20やMME30に送信する要求に加え、グループを識別する情報を含めても良い。
図18にデセントラライズモードにおける通信路を確立した場合のUE10a、UE10b、UE-R15におけるTFTの例を示す。図18では、アプリケーション1におけるTFTの例を示している。ここで、アプリケーション1における例のみを示しているが、TFTにおいて、アプリケーション2やアプリケーション3が管理されても良い。
第1実施形態では、デセントラライズモードへの切り替え要求を含む通信路確立手続きにより、デセントラライズモードの通信路へ切り替えを行っていたが、デセントラライズモードの通信路を確立した後、デセントラライズモードへの切り替え要求を含むGOモードの通信路削除手続きにおいて、切り替え手続きを行っても良い。
図19に変形例1におけるデセントラライズモードへの切り替え手続きを示す。まず、UE-R15はデセントラライズモードへの切り替えを決定する(S1902)。デセントラライズモードへの切り替えの決定は、例えば、グループのメンバーが近隣に存在することを検出して決定してもよい。つまり、UE10aとUE10bとが近隣に存在することを検出して切り替えを決定して良い。また、デセントラライズモードへの切り替えの決定は、UE-R15がeNB20の圏外となり、コアネットワークへの接続を維持できなくなることを検出して決定しても良い。
デセントラライズモードへの切り替え要求を含むGOモードの通信路削除手続きを説明する。図21に、デセントラライズモードへの切り替え要求を含むGOモードの通信路削除手続きの例を示す。なお、GOモードの切り替え要求を含む通信路確立手続きであれば、本手続きでなくても良い。
第1実施形態、変形例1では、GOモードの通信路からデセントラライズモードの通信路への切り替え手続きについて説明したが、第2実施形態では、デセントラライズモードにおける通信路からGOモードの通信路へ切り替える手続きについて説明する。
第2実施形態におけるGOモードへの切り替え手続きについて説明する。図23に、GOモードへの切り替え手続きを示す。まず、UE-R15はEPCへの接続手続きを行う(S2304)。UE-R15のEPCへの接続手続きは第1の実施形態で示した方法を利用できるため、詳細な説明は省略する。
次に、UE10aとUE10bは、GOモードへの切り替え要求を含むGOモードの通信路確立手続きを行う(S2320)。図24に、GOモードへの切り替え要求を含む通信路確立手続きの例を示す。なお、GOモードへの切り替え要求を含む通信路確立手続きであれば、本手続きでなくても良い。
送受信のみをGOモードの通信路へ切り替えて良い。
次に、UE-R15はデセントラライズモードにおける通信路削除手続きを行う(S2328)。図25にデセントラライズモードの通信路確立手続きの例を示す。なお、デセントラライズモードの通信路確立手続きであれば、本手続きでなくても良い。
第2実施形態では、GOモードへの切り替え要求を含む通信路確立手続きにより、GOモードの通信路へ切り替えを行っていたが、GOモードの通信路を確立した後、GOモードへの切り替え要求を含むデセントラライズモードの通信路削除手続きにおいて、切り替え手続きを行っても良い。
変形例2におけるGOモードへの切り替え手続きについて説明する。図26に、GOモードへの切り替え手続きを示す。まず、UE-R15はEPCへの接続手続きを行う(S2604)。UE-R15のEPCへの接続手続きは第1の実施形態で示した方法を利用できるため、詳細な説明は省略する。
次に、UE10aとUE10bはデセントラライズモードの通信路削除手続きを行っても良い(S2632)。図27にUE10aとUE10b間のデセントラライズモードの通信路削除手続きの例を示す。なお、UE10aとUE10b間のデセントラライズモードの通信路確立手続きであれば、本手続きでなくても良い。
第1実施形態、変形例1、第2実施形態、変形例2では、UE-R15は、UE10aとUE10bと同じグループに含まれていたが、第3実施形態では、UE-R15はUE10aとUE10bと同じグループに含まれない場合について説明する。
第3実施形態におけるデセントラライズモードへの切り替え手続きについて説明する。図30に、デセントラライズモードへの切り替え手続きを示す。なお、デセントラライズモードへの切り替えは、GOモードの通信路においてデータの送受信中に行われる。
indicatorを含める。なお、デセントラライズモードへの切り替え要求を示すインディケータであれば、switch indicatorでなくても良い。
図31にデセントラライズモードにおける通信路を確立した場合のUE10a、UE10b、UE-R15におけるTFTの例を示す。図31では、アプリケーション1におけるTFTの例を示している。ここで、アプリケーション1における例のみを示しているが、TFTにおいて、アプリケーション2やアプリケーション3が管理されても良い。
第3実施形態では、GOモードの通信路からデセントラライズモードの通信路への切り替え手続きについて説明したが、第4実施形態では、デセントラライズモードにおける通信路からGOモードの通信路へ切り替える手続きについて説明する。なお、第1実施形態、変形例1、第2実施形態、変形例2では、UE-R15は、UE10aとUE10bと同じグループに含まれていたが、第4実施形態では、第3実施形態と同様、UE-R15はUE10aとUE10bと同じグループに含まれない場合について説明する。
第4実施形態におけるGOモードへの切り替え手続きについて説明する。図32に、GOモードへの切り替え手続きを示す。まず、UE-R15はあらかじめEPCへの接続手続きを行っておく(S3204)。ここで、UE-R15のEPCへの接続手続きは第1の実施形態で示した方法を利用できるため、詳細な説明は省略する。
ここで、UE10aが複数のUE-R15からGOモードにおける通信路が利用可能であることを検知した場合、UE-R15の選択を行ってよい(S3210)。図33に、UE-R15の選択する手続きの例を示す。なお、UE-R15を選択する方法は、これに限ったものでなく、他の方法であってもよい。
第4実施形態では、GOモードへの切り替え要求を含む通信路確立手続きにより、GOモードの通信路へ切り替えを行っていたが、GOモードの通信路を確立した後、GOモードへの切り替え要求を含むデセントラライズモードの通信路削除手続きにおいて、切り替え手続きを行っても良い。
第4実施形態におけるGOモードへの切り替え手続きについて説明する。図34に、GOモードへの切り替え手続きを示す。まず、UE-R15はあらかじめEPCへの接続手続きを行っておく(S3404)。ここで、UE-R15のEPCへの接続手続きは第1の実施形態で示した方法を利用できるため、詳細な説明は省略する。
5 IP移動通信ネットワーク
7 コアネットワーク
9 LTEアクセスネットワーク
10 UE
15 UE-R
20 eNB
30 MME
40 SGW
50 PGW
60 HSS
70 PCRF
80 PDN
90 ProSe Server
Claims (19)
- リレー端末装置であって、
端末装置から送信されるデータを基地局装置に転送し、基地局装置から送信されるデータを前記端末装置に転送する第一のモードにおける第一の通信路を確立し、前記第一のモードにおける前記第一の通信路においてデータの送受信中に、
前記リレー端末装置の近隣に存在する端末装置とデータを直接送信する第二のモードにおける第二の通信路へデータの送受信を切り替える場合に、
前記第二の通信路へ切り替えることを示す情報を含む、前記第二の通信路へ切り替えを要求する要求メッセージを前記端末装置に送信し、
前記端末装置から、前記切り替えを要求する要求メッセージに対する応答メッセージを受信し、
前記第二のモードにおける前記第二の通信路を確立し、
前記第一の通信路のデータの送受信を前記第二の通信路へ切り替える、
ことを特徴とするリレー端末装置。 - リレー端末装置であって、
前記リレー端末装置の近隣に存在する端末装置とデータを直接送信する第二のモードにおける第二の通信路を確立し、前記第二のモードにおける前記第二の通信路においてデータの送受信中に、
前記端末装置から送信されるデータを基地局装置に転送し、基地局装置から送信されるデータを前記端末装置に転送する第一のモードにおける第一の通信路へデータの送受信を切り替える場合、
前記第一のモードにおける前記第一の通信路へ切り替えることを示す情報を含む、前記第一のモードにおける前記第一の通信路へ切り替えを要求する要求メッセージを前記端末装置に送信し、
前記端末装置から前記切り替えを要求する要求メッセージに対する応答メッセージを受信し、
前記第一のモードにおける前記第一の通信路を確立し、
前記第二のモードにおける前記第二の通信路のデータの送受信を前記第一のモードにおける前記第一の通信路へ切り替える、
ことを特徴とするリレー端末装置。 - 前記切り替えを要求する要求メッセージは、通信路を確立することを要求する要求メッセージであることを特徴とする請求項1または請求項2に記載のリレー端末装置。
- 前記切り替えを要求する要求メッセージは、切り替え前の通信路を削除することを要求する要求メッセージであることを特徴とする請求項1または請求項2に記載のリレー端末装置。
- 前記切り替えを要求する要求メッセージは、前記端末装置若しくは前記リレー端末装置を識別する情報又は接続先を示す情報を含むことを特徴とする請求項1から請求項4のいずれか一項に記載のリレー端末装置。
- 端末装置であって、
前記端末装置の近隣に存在するリレー端末装置とデータを直接送信する第二のモードにおける第二の通信路を確立し、前記第二のモードにおける前記第二の通信路においてデータの送受信中に、
前記リレー端末装置を経由してデータを送信する第一のモードにおける第一の通信路へデータの送受信を切り替える場合、
前記第一のモードにおける前記第一の通信路へ切り替えることを示す情報を含む、前記第一のモードにおける前記第一の通信路へ切り替えを要求する要求メッセージを前記リレー端末装置に送信し、
前記リレー端末装置から、前記切り替えを要求する要求メッセージに対する応答メッセージを受信し、
前記第一のモードにおける前記第一の通信路を確立し、
前記第二のモードにおける前記第二の通信路のデータの送受信を前記第一のモードにおける第一の通信路へ切り替える、
ことを特徴とする端末装置。 - 端末装置であって、
前記端末装置の近隣に存在するリレー端末装置を経由してデータを送信する第一のモードにおける第一の通信路を確立し、前記第一のモードにおける前記第一の通信路においてデータの送受信中に、
前記端末装置の近隣に存在する第二の端末装置とデータを直接送信する第二のモードにおける第二の通信路へ切り替える場合、
前記第二のモードにおける前記第二の通信路へ切り替えることを示す情報を含む、前記第二のモードにおける前記第二の通信路へ切り替えを要求する要求メッセージを前記第二の端末装置に送信し、
前記第二の端末装置から、前記切り替えを要求する要求メッセージに対する応答メッセージを受信し、
前記第二のモードにおける前記第二の通信路を確立し、
前記第一のモードにおける前記第一の通信路のデータの送受信を前記第二のモードにおける前記第二の通信路へ切り替える、
ことを特徴とする端末装置。 - 端末装置であって、
前記端末装置の近隣に存在する第二の端末装置とデータを直接送信する第二のモードにおける第二の通信路を確立し、前記第二のモードにおける前記第二の通信路においてデータの送受信中に、
前記端末装置の近隣に存在するリレー端末装置を経由してデータを送信する第一のモードにおける第一の通信路へ切り替える場合、
前記第一のモードにおける前記第一の通信路へ切り替えることを示す情報を含む、前記第一のモードにおける前記第一の通信路へ切り替えを要求する要求メッセージを前記第二の端末装置に送信し、
前記第二の端末装置から、前記切り替えを要求する要求メッセージに対する応答メッセージを受信し、
前記第一のモードにおける前記第一の通信路を確立し、
前記第二のモードにおける前記第二の通信路のデータの送受信を前記第一のモードにおける前記第一の通信路へ切り替える、
ことを特徴とする端末装置。 - 前記切り替えを要求する要求メッセージは、通信路を確立することを要求する要求メッセージであることを特徴とする請求項6から請求項8のいずれか一項に記載の端末装置。
- 前記切り替えを要求する要求メッセージは、通信路を削除することを要求する要求メッセージであることを特徴とする請求項6から請求項8のいずれか一項に記載の端末装置。
- 前記切り替えを要求する要求メッセージは、前記端末装置若しくは前記リレー端末装置を識別する情報又は接続先を示す情報を含むことを特徴とする請求項6から請求項10のいずれか一項に記載の端末装置。
- リレー端末装置の通信制御方法であって、
端末装置から送信されるデータを基地局装置に転送し、基地局装置から送信されるデータを前記端末装置に転送する第一のモードにおける第一の通信路を確立し、前記第一のモードにおける前記第一の通信路においてデータの送受信中に、
前記リレー端末装置の近隣に存在する端末装置とデータを直接送信する第二のモードにおける第二の通信路へデータの送受信を切り替える場合、
前記第二のモードにおける前記第二の通信路へ切り替えることを示す情報を含む、前記前記第二のモードにおける第二の通信路へ切り替えを要求する要求メッセージを前記端末装置に送信するステップと、
前記端末装置から、前記切り替えを要求する要求メッセージに対する応答メッセージを受信し、
前記第二のモードにおける前記第二の通信路を確立するステップと、
前記第一のモードにおける前記第一の通信路のデータの送受信を前記第二のモードにおける前記第二の通信路へ切り替えるステップと、
を備えることを特徴とする通信制御方法。 - リレー端末装置の通信制御方法であって、
前記リレー端末装置の近隣に存在する端末装置とデータを直接送信する第二のモードにおける第二の通信路を確立し、前記第二のモードにおける前記第二の通信路においてデータの送受信中に、
前記端末装置から送信されるデータを基地局装置に転送し、前記基地局装置から送信されるデータを前記端末装置に転送する第一のモードにおける第一の通信路へデータの送受信を切り替える場合、
前記第一のモードにおける前記第一の通信路へ切り替えることを示す情報を含む、前記第一のモードにおける前記第一の通信路へ切り替えを要求する要求メッセージを前記端末装置に送信するステップと、
前記端末装置から前記切り替えを要求する要求メッセージに対する応答メッセージを受信するステップと、
前記第一のモードにおける第一の通信路を確立するステップと、
前記第二のモードにおける前記第二の通信路のデータの送受信を前記第一のモードにおける前記第一の通信路へ切り替えるステップと、
を備えることを特徴とする通信制御方法。 - 端末装置の通信制御方法であって、
前記端末装置の近隣に存在するリレー端末装置とデータを直接送信する第二のモードにおける第二の通信路を確立し、前記第二のモードにおける前記第二の通信路においてデータの送受信中に、
前記端末装置は前記リレー端末装置を経由してデータを送信する第一のモードにおける第一の通信路へデータの送受信を切り替える場合、
前記第一のモードにおける前記第一の通信路へ切り替えることを示す情報を含む、前記第一のモードにおける前記第一の通信路へ切り替えを要求する要求メッセージを前記リレー端末装置に送信するステップと、
前記リレー端末装置から、前記切り替えを要求する要求メッセージに対する応答メッセージを受信するステップと、
前記第一のモードにおける前記第一の通信路を確立するステップと、
前記第二のモードにおける前記第二の通信路のデータの送受信を前記第一のモードにおける前記第一の通信路へ切り替えるステップと、
を備えることを特徴とする通信制御方法。 - 端末装置の通信制御方法であって、
前記端末装置の近隣に存在するリレー端末装置を経由してデータを送信する第一のモードにおける第一の通信路を確立し、前記第一のモードにおける前記第一の通信路においてデータの送受信中に、
前記端末装置の近隣に存在する前記第二の端末装置とデータを直接送信する第二のモードにおける第二の通信路へ切り替える場合、
前記第二のモードにおける前記第二の通信路へ切り替えることを示す情報を含む、前記第二のモードにおける前記第二の通信路へ切り替えを要求する要求メッセージを前記第二の端末装置に送信するステップと、
前記第二の端末装置から、前記切り替えを要求する要求メッセージに対する応答メッセージを受信するステップと、
前記第二のモードにおける前記第二の通信路を確立するステップと、
前記第一のモードにおける前記第一の通信路のデータの送受信を前記第二のモードにおける前記第二の通信路へ切り替えるステップと、
を備えることを特徴とする通信制御方法。 - 端末装置の通信制御方法であって、
前記端末装置の近隣に存在する第二の端末装置とデータを直接送信する第二のモードにおける第二の通信路を確立し、前記第二のモードにおける前記第二の通信路においてデータの送受信中に、
前記端末装置の近隣に存在するリレー端末装置を経由してデータを送信する第一のモードにおける第一の通信路へ切り替える場合、
前記第一のモードにおける前記第一の通信路へ切り替えることを示す情報を含む、前記第一のモードにおける前記第一の通信路へ切り替えを要求する要求メッセージを前記第二の端末装置に送信するステップと、
前記第二の端末装置から、前記切り替えを要求する要求メッセージに対する応答メッセージを受信するステップと、
前記第一のモードにおける前記第一の通信路を確立するステップと、
前記第二のモードにおける前記第二の通信路のデータの送受信を前記第一のモードにおける前記第一の通信路へ切り替えるステップと、
を備えることを特徴とする通信制御方法。 - 前記切り替えを要求する要求メッセージは、通信路を確立することを要求する要求メッセージであることを特徴とする請求項12から請求項16のいずれか一項に記載の通信制御方法。
- 前記切り替えを要求する要求メッセージは、通信路を削除することを要求する要求メッセージであることを特徴とする請求項12から請求項16のいずれか一項に記載の通信制御方法。
- 前記切り替えを要求する要求メッセージは、前記端末装置若しくは前記リレー端末装置を識別する情報又は接続先を示す情報を含むことを特徴とする請求項12から請求項16のいずれか一項に記載の通信制御方法。
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WO2022021355A1 (zh) * | 2020-07-31 | 2022-02-03 | Oppo广东移动通信有限公司 | 会话建立方法、装置、设备及存储介质 |
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