WO2014173152A1 - Terminal direct communication establishment method, server, base station and terminal - Google Patents

Terminal direct communication establishment method, server, base station and terminal Download PDF

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Publication number
WO2014173152A1
WO2014173152A1 PCT/CN2013/089997 CN2013089997W WO2014173152A1 WO 2014173152 A1 WO2014173152 A1 WO 2014173152A1 CN 2013089997 W CN2013089997 W CN 2013089997W WO 2014173152 A1 WO2014173152 A1 WO 2014173152A1
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WO
WIPO (PCT)
Prior art keywords
terminal
communication
direct communication
core network
bearer
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PCT/CN2013/089997
Other languages
French (fr)
Chinese (zh)
Inventor
朱进国
陈琳
宗在峰
Original Assignee
中兴通讯股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Priority to CN201310140644.6 priority Critical
Priority to CN201310140644.6A priority patent/CN104113916A/en
Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Publication of WO2014173152A1 publication Critical patent/WO2014173152A1/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W28/00Network traffic or resource management
    • H04W28/16Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W76/00Connection management
    • H04W76/10Connection setup
    • H04W76/14Direct-mode setup

Abstract

Disclosed is a terminal direct communication establishment method, comprising: a source terminal transmits a direct communication establishment request to a server in a core network where the source terminal is located, the direct communication establishment request carrying a communication destination identifier and a data stream identifier to use for establishing the direct communication; the server in the core network where the source terminal is located transmits, according to the communication destination identifier, the direct communication establishment request to a server in a core network where a destination terminal is located; the server in the core network where the destination terminal is located requests a base station to allocate wireless resources for a direct communication bearer; and the source terminal and the destination terminal establish the direct communication bearer therebetween based on the wireless resources allocated by the base station. Also disclosed are a server, base station and terminal.

Description

 Method for establishing terminal direct communication, server, base station and terminal

 The present invention relates to a D2D (Device to Device) technology in the field of mobile communications, and in particular, to a method for establishing direct communication of a terminal, a server, a base station, a terminal, and a computer readable storage medium. Background technique

 Terminals in the adjacent area can bring many benefits to the terminal by using D2D direct communication, such as higher speed, lower delay and lower power consumption, and also greatly improve the wireless resource efficiency of the operator, D2D relay. The (Relay) mode is conducive to operators to improve wireless coverage; for applications, the use of proximity information in the D2D communication process can develop new services that are more attractive to users. The Public Safety system can also use D2D technology to enable communication between terminals without wireless coverage.

 The D2D-related topics in the 3rd Generation Partnership Project (3GPP, 3rd Generation Partnership Project) are called ProSeimity-based Services, and are mainly studied in Long Term Evolution (LTE) and Evolution. How to implement D2D services under the EPC (Evolved Packet Core) architecture.

 According to the current research progress of ProSe, the problem of how to establish direct communication between ProSe terminals has not been provided in the prior art, thereby causing inconvenience to practical applications. Summary of the invention

 In order to solve the existing technical problems, embodiments of the present invention provide a method for establishing direct communication of a terminal, a server, a base station, a terminal, and a computer readable storage medium.

An embodiment of the present invention provides a method for establishing direct communication of a terminal, where the method includes: sending, by a source terminal, a direct connection communication request to a core network server where the source terminal is located, where a target identifier, and a data flow identifier for which it is desired to establish direct communication;

 The core network server where the source terminal is located sends the establishment direct connection communication request to the core network server where the target terminal is located according to the communication target identifier;

 The core network server requests the base station to allocate a radio resource of the direct communication bearer;

 A direct communication bearer is established between the source terminal and the target terminal based on the radio resources allocated by the base station.

 The embodiment of the present invention further provides a method for establishing direct communication of a terminal, where the method includes: the source terminal and the target terminal respectively obtain radio resources carried by the direct connection communication; and the source terminal and the target terminal notify each other through the data channel The wireless resource carried by the direct connection communication establishes direct communication between the source terminal and the target terminal.

 The embodiment of the invention further provides a core network server, including:

 The receiving module is configured to receive a direct communication request of the source terminal, and obtain a data flow identifier of the direct communication to be established;

 The requesting module is configured to, according to the data flow identifier, request the packet gateway to establish a direct communication bearer for the corresponding data flow, and request the base station to allocate the radio resource directly connected to the communication bearer.

 The embodiment of the invention further provides a base station, including:

 The resource allocation module is configured to allocate the data packet resource of the source terminal as the data packet resource of the target terminal to the target terminal, and allocate the data packet resource of the target terminal as the data packet resource of the source terminal to the Describe the source terminal.

 The embodiment of the invention further provides a terminal, including:

 a radio resource acquisition module, configured to obtain a radio resource carried by the direct communication;

 The direct connection communication establishing module is configured to notify each other of the wireless resources of the direct communication communication between the communication peers through the data channel, and establish direct communication with the communication peer end.

 The embodiment of the invention further provides a computer readable storage medium, the storage medium comprising a set of instructions, wherein the instructions are used to perform the method for establishing direct communication of the terminal.

A method for establishing direct communication of a terminal, a server, a base station, and a base station provided by an embodiment of the present invention a terminal and a computer readable storage medium, wherein the ProSe server where the terminal is located requests the base station to allocate a radio resource of the direct communication bearer, and the terminal establishes a direct communication bearer based on the radio resource allocated by the base station; or, the terminal passes the signaling The process negotiates the radio resources carried by the direct communication, and establishes a direct communication bearer based on the negotiated radio resources. The embodiment of the invention implements the establishment of direct communication between ProSe terminals. DRAWINGS

 1 is a flowchart of a method for establishing direct communication of a terminal according to an embodiment of the present invention; FIG. 2 is a schematic structural diagram of a ProSe server according to an embodiment of the present invention;

 3 is a schematic structural diagram of a base station according to an embodiment of the present invention;

 4 is a schematic structural diagram of a terminal according to an embodiment of the present invention;

 FIG. 5 is a schematic structural diagram of a network system according to an embodiment of the present invention; FIG.

 6 is a schematic diagram of a process of negotiating ProSe resources and establishing ProSe communication through a network in the case of network coverage according to an embodiment of the present invention;

 FIG. 7 is a schematic diagram of a process for directly negotiating ProSe resources and establishing ProSe communication between terminals in the case of network coverage according to an embodiment of the present invention;

 FIG. 8 is a schematic diagram of a process for directly coordinating ProSe resources and establishing ProSe communication between terminals without network coverage according to an embodiment of the present invention. detailed description

 The technical solutions of the present invention are further elaborated below in conjunction with the accompanying drawings and specific embodiments.

 The functions of the main network elements in the 3GPP architecture are described as follows:

 The terminal is also referred to as a user equipment (UE, User Equipment). The terminal accesses the base station through the radio, and the terminal and the mobility management unit of the core network communicate with each other through a non-access stratum (NAS, Non-Access Stratum) interface.

Base station: Also known as an evolved NodeB (eNodeB, Evolved NodeB) in an evolved system, The radio resources are mainly provided for the access of the terminal, and the base station and the mobile management unit of the core network communicate with each other through the S1 interface.

 Mobility Management Element (MME): is a control plane entity of a visited place. It is a server that temporarily stores user data. It is responsible for managing and storing UE contexts (such as UE/user ID, mobility context, user security parameters, and ^). Carry the context, etc.), authenticate the terminal. In order to perform load sharing and mitigation for all mobility management units within a region, 3GPP defines the concept of a mobility management unit pool in which all MMEs and all base stations are interconnected. The MME allocates a Globally Unique Temporary Identity (GUTI) to the user. The GUTI includes the network identifier, the pool identifier, the mobility management unit identifier, and the user identifier. The GUTI can be uniquely determined by the GUTI. The MMEs are connected through an S3 interface.

 Home server: Located in the home network, the main function is to provide subscription information and authentication. When the user accesses the MME from the visited location, the authentication information needs to be obtained from the home server and the terminal is authenticated. If the authentication succeeds, the subscription information is continuously obtained from the home server. The home server also checks if the user is allowed to roam to the visited network MME.

 Packet gateway: mainly includes a service gateway (S-GW, Serving Gateway) and a PDN (P-GW, Packet Data Network Gateway). The S-GW is a mobility anchor between 2G and 3G. When downlink data arrives, if When the user is in an idle state, the S-GW buffers the data and triggers the MME to perform paging. The P-GW mainly allocates the user's IP address, which is the anchor point of the user when moving across systems. The S-GW and the P-GW can be combined or separated at the time of deployment. The P-GW also has the function of flow metering. An S5 or S8 interface is between the S-GW and the P-GW, and an S4 interface is between the S-GW and the MME.

 A method for establishing direct communication of a terminal according to an embodiment of the present invention, as shown in FIG. 1, mainly includes:

Step 101: The source terminal sends a direct connection communication request to the core network server where it is located, where the communication target identifier is carried, and the data flow identifier of the direct connection communication is desired to be established. Step 102: The core network server where the source terminal is located sends the establishment direct connection communication request to the core network server where the target terminal is located according to the communication target identifier.

 Step 103: The core network server requests the base station to allocate the radio resource of the direct communication bearer. Step 104: Establish a direct communication bearer between the source terminal and the target terminal based on the radio resources allocated by the base station.

 In an embodiment, the method further includes:

 And the core network server sends the received data flow identifier to the packet gateway by using a bearer modification command, where the bearer indicates that the direct communication communication bearer is established;

 The packet gateway initiates a new bearer process to the core network server, and establishes a direct communication bearer for the corresponding data stream.

 In an embodiment, the method further includes:

 After receiving the request for establishing a direct connection communication, the core network server, where the target terminal is located, sends a message to the target terminal, and the source terminal is notified to initiate the establishment of a direct communication request, and the message carries the message. The data flow identifier requested by the source terminal.

 In an embodiment, the method further includes:

 The target terminal finds a data flow identifier in the corresponding target terminal according to the data flow identifier requested by the source terminal, and sends a direct connection communication request to the server where the target terminal is located, where the data of the target terminal is carried. Stream ID.

 In an embodiment, the method further includes:

 The base station allocates an association identifier to the source terminal context, and sends the association identifier to the core network server. The core network server requests the base station to allocate a radio resource to the target terminal, and the base station finds the context of the source terminal according to the association identifier.

 In an embodiment, the method further includes:

When the base station directly connects to the radio resource carried by the communication, the base station sends the data packet resource of the source terminal as the data packet resource of the target terminal to the target terminal, and uses the data packet resource of the target terminal as the data received by the source terminal. A packet resource is allocated to the source terminal. In an embodiment, the method further includes:

 After receiving the request from the core network server, the base station establishes a connection from the wireless link of the source terminal to the wireless link of the target terminal within the base station.

 In an embodiment, the method further includes:

 After the base station allocates the radio resources of the direct connection communication bearer of the source terminal and the target terminal, the base station notifies the core network server; the core network server returns a response to the packet gateway, and the packet gateway sends the corresponding data requested by the terminal. The stream is removed from the core network bearer.

 Another method for establishing direct communication of a terminal provided by the embodiment of the present invention mainly includes: a source terminal and a target terminal respectively obtain radio resources that are directly connected to the communication; and the source terminal and the target terminal notify each other through a data channel. The radio resource carried by the direct connection communication establishes direct communication between the source terminal and the target terminal.

 In an embodiment, the source terminal and the target terminal obtain the radio resources carried by the direct communication link according to the static configuration.

 In an embodiment, the source terminal and the target terminal dynamically allocate radio resources carried by the direct communication from the network.

 In an embodiment, the method further includes:

 The source terminal and the target terminal send a direct connection communication request to the core network server where the source terminal and the target terminal carry, and carry the data flow identifier indicating that the direct communication communication bearer is established and the direct communication is desired to be established.

 In an embodiment, the method further includes:

 The core network server sends the received data stream identifier to the packet gateway by using a message, where the packet carries a direct connection communication bearer indication; the packet gateway initiates a new bearer process to the core network server, and identifies the data indicated by the data flow identifier. The flow creates a new direct communication bearer.

 In an embodiment, the method further includes:

 The core network server requests a base station to allocate a direct communication communication bearer, and the base station allocates, to the source terminal and the target terminal, a radio resource of a transmission data packet of a direct communication communication bearer.

In an embodiment, the method further includes: The base station notifies the core network server after allocating the radio resources of the direct communication bearer; the core network server returns a response to the packet gateway, where the packet gateway requests the corresponding data stream requested by the source terminal and the target terminal Deleted in the core network bearer.

 In an embodiment, the data channel includes a data channel through the core network between the source terminal and the target terminal.

 In an embodiment, the method further includes: the source terminal obtaining the data channel radio resource negotiated by the resource or the radio resource directly communicating from the broadcast signal of the target terminal.

 Corresponding to the method for establishing the direct communication of the terminal, the embodiment of the present invention further provides a core network server, as shown in FIG. 2, which mainly includes:

 The receiving module 10 is configured to receive a direct connection communication request of the source terminal, and obtain a data flow identifier that is desired to establish direct communication;

 The requesting module 20 is configured to, according to the data flow identifier, request the packet gateway to establish a direct communication bearer for the corresponding data stream, and request the base station to allocate the radio resource of the direct communication bearer.

 In an embodiment, the requesting module 20 is further configured to request, from the packet gateway, to delete the data stream corresponding to the data stream identifier from the core network bearer.

 In an embodiment, the core network server where the source terminal is located receives the data flow identifier from the source terminal, and sends a direct connection communication request to the target core network server where the target terminal is located according to the communication target identifier.

 In an embodiment, the core network server where the source terminal is located requests the base station to allocate the radio resource of the direct communication bearer, and after obtaining the allocated association identifier from the base station, the association identifier is sent to the core where the target terminal is located. Web server.

 In addition, the receiving module 10 and the requesting module 20 may be a central processing unit (CPU), a processor (MPU, a Micro Processing Unit), a digital signal processor (DSP), or a programmable logic in a server. Array (FPGA, Field - Programmable Gate Array) implementation.

The embodiment of the present invention further provides a base station, as shown in FIG. 3, including: The resource allocation module 30 is configured to allocate the data packet resource of the source terminal as the data packet resource of the target terminal to the target terminal, and allocate the data packet resource of the target terminal as the data packet resource of the source terminal to The source terminal.

 In an embodiment, the base station of the source terminal further includes: an association identifier allocation module 40 configured to allocate an association identifier, and send the association identifier to the base station of the target terminal through the core network server, where the base station of the target terminal Finding the context of the source terminal according to the association identifier.

 In addition, the resource allocation module 30 and the associated identifier allocation module 40 may be implemented by a central processing unit (CPU), a microprocessor (MPU, Micro Processing Unit), and a digital signal processor (DSP). Or programmable logic array (FPGA, Field - Programmable Gate Array) implementation.

 The embodiment of the present invention further provides a terminal, as shown in FIG. 4, including:

 The radio resource acquisition module 50 is configured to obtain the radio resource of the direct connection communication bearer. The direct connection communication establishing module 60 is configured to notify each other of the radio resources of the direct communication communication between the communication peers through the data channel. Direct communication with the communication peer.

 In an embodiment, the direct connection communication establishing module 60 is further configured to: send the data packet resource of the terminal itself to the communication peer end, receive the data packet resource of the communication peer end, and use the data packet resource of the communication peer end as Its own receiving packet resources.

 In an embodiment, the radio resource acquisition module 50 is further configured to obtain a radio resource directly connected to the communication bearer according to the static configuration, or dynamically allocate the radio resource of the direct communication bearer from the network.

 In an embodiment, the terminal transmits the resource channel radio resource negotiated by the resource or the directly communicated radio resource by using a broadcast signal.

In addition, the radio resource obtaining module 50 and the direct communication establishing module 60 may be implemented by a central processing unit (CPU), a microprocessor (MPU, Micro Processing Unit), and a digital signal processor (DSP, Digital Signal). Processor ) or editable Field-Programmable Gate Array (FPGA) implementation.

 Corresponding to the embodiment of the present invention, the core network server (also referred to as the ProSe server in the embodiment of the present invention) may be added to the MME pool. The ProSe server supports the original MME function, and may be newly built or upgraded from the MME pool. Support for ProSe services. Referring to the network system architecture shown in FIG. 5, the ProSer server is connected to all the base stations (eNodeBs) in the MME pool through the S1 interface, and is connected to the terminal through the NAS interface, and the MME can be interconnected through the interface S3 between the MMEs. The functions of the ProSe server mainly include the terminal registration function, the terminal discovery function, and the terminal ProSe communication establishment function. The ProSe registration function allocates a ProSe ID to each application on the terminal, and uniquely identifies the terminal and the application. The ProSe discovery function mainly ensures that the ProSe terminals are in a neighboring area, and the so-called neighboring areas, that is, the terminals are relatively close, and can be initiated. The area of ProSe communication.

 The method for establishing direct communication of the terminal of the present invention will be further elaborated below in conjunction with specific embodiments.

 Figure 6 shows the process of negotiating ProSe resources and establishing ProSe communication through the network in the case of network coverage, including:

 In step 201, the ProSe terminal 1 registers with the ProSe server 1 to obtain the ProSe ID1; the ProSe terminal 2 registers with the ProSe server 2 to obtain the ProSe ID2. Through the application layer interaction, the ProSe terminal 1 and the ProSe terminal 2 start data communication. In this process, the terminal migrates from the idle state to the connected state, and newly creates a bearer according to requirements. The terminal saves a packet filter, the packet filter uniquely identifies a data flow, and the terminal uses the data flow template (TFT, Traffic Flow Template ) uniquely maps the data stream to the bearer. When the terminal is in the connected state, the base station and the ProSe server save the QoS and bearer identifier of the bearer built by the terminal.

 Step 202: The ProSe terminal 1 and the ProSe terminal 2 discover that they are in a neighboring area through the ProSe discovery process, and decide to initiate ProSe communication.

This process can be performed prior to the actual data communication, where a discovery process is repeated before the ProSe communication is actually initiated to ensure that the terminal is indeed in the vicinity. Step 203: The terminal 1 initiates a ProSe communication request to the ProSe server 1, where the ProSe ID2 of the terminal 2 is carried. The terminal 1 carries the data flow identifier of the ProSe communication to the ProSe server 1.

 The ProSe communication request may use a new ProSe resource to establish a message; or modify the original UE to initiate a bearer resource message with a new ProSe indication.

 Step 204: The ProSe server 1 initiates a bearer resource command message to the packet gateway, where the data flow identifier sent by the terminal 1 carries the ProSe indication. Here, the packet gateway refers to the P-GW, and the S-GW generally transparently transmits the bearer resource command message to the P-GW.

 Step 205: The packet gateway processes the bearer resource command message, and finds that a ProSe communication needs to be established for the data flow identifier, and then allocates QoS and performs resource authorization, and sends a new bearer request to the ProSe server 1, requesting to create a new ProSe bearer, where the new bearer is carried. Beared QoS and corresponding TFT.

 In this step, the packet gateway can also adjust the QoS of the original bearer according to the calculation, and initiate a modification process on the original bearer.

 Step 206: The ProSe server 1 allocates a bearer identifier for the new ProSe bearer, and the ProSe server 1 generates a NAS message with a TFT and a newly assigned bearer identifier. The ProSe server 1 initiates a new bearer request to the base station, which carries the requested QoS, ProSe indication, and NAS message.

 Step 207: The base station finds that the new bearer is a ProSe bearer, and then caches the corresponding NAS message, and allocates an association identifier. The association identifier is mainly used by the terminal 2 to perform the context of the associated terminal 1 at the base station when the bearer is established. The base station carries the association identifier in the setup bearer response and returns it to the ProSe server 1.

 Step 208: The ProSe server 1 forwards the ProSe communication request to the ProSe server 2 that allocates ProSe ID2, which carries the ProSe ID2 and the association identifier, and the data stream identifier requested by the terminal 1.

Step 209, the ProSe server 2 requests the terminal 2 to establish ProSe communication, and the terminal 1 is requested. The requested data flow identifier is carried to the terminal 2.

 Step 210: The terminal 2 finds a corresponding data stream identifier according to the received data stream identifier, and initiates a ProSe communication request to the ProSe server 2, where the data stream identifier of the ProSe communication is required to be carried.

 ProSe communication requests can be established with new ProSe resources; or

The UE initiates a message carrying the resource to be modified to have a new ProSe indication.

 Step 211: The ProSe server 2 initiates a bearer resource command message to the packet gateway, where the data flow identifier sent by the terminal 2 and the ProSe indication are carried. Here, the packet gateway refers to the P-GW, and the S-GW generally transparently transmits the bearer resource command message to the P-GW.

 Step 212: The packet gateway processes the bearer resource command message, and finds that a ProSe communication needs to be established for the data flow identifier, and then allocates QoS and performs resource authorization, and sends a new bearer request to the ProSe server 2, requesting to create a new ProSe bearer, where the new bearer is carried. Bearer QoS.

 In this step, the packet gateway can also adjust the QoS of the original bearer according to the calculation, and initiate a modification process on the original bearer.

 Step 213: The ProSe server 2 allocates a bearer identifier for the new ProSe bearer, and generates a NAS message with a TFT. The ProSe server 2 initiates a new bearer request to the base station, which carries the requested QoS, NAS message, ProSe indication, and the associated identity received in step 209.

 Step 214: The base station finds the context of the terminal 1 according to the association identifier, and then the base station allocates a ProSe-issued data packet bearer resource for the terminal 1 and the terminal 2, respectively, and allocates the received data packet resource as the sending data packet resource of the other party.

 Step 215: The base station allocates the ProSe transceiver data resource of the terminal 1 to the terminal 1, and sends the NAS message buffered by the terminal 1 to the terminal 1.

 Step 216: The base station allocates the ProSe transceiver data resource of the terminal 2 to the terminal 2, and sends the NAS message of the terminal 2 to the terminal 2.

Step 217: The base station returns a setup bearer response to the ProSe server 2. Step 218, the ProSe server 2 returns a bearer response to the packet gateway, and the packet gateway deletes the data stream of the terminal 2 indicated in step 211 from the original core network bearer.

 Step 219, the ProSe server 2 returns a ProSe communication establishment completion response to the terminal 2. Step 220, the ProSe server 2 returns a ProSe communication setup completion response to the ProSe server 1.

 Step 221: The ProSe server 1 returns a bearer response to the packet gateway, and the packet gateway deletes the data stream of the terminal 1 indicated in step 204 from the original core network bearer.

 Step 222, the ProSe server 1 returns a ProSe communication establishment completion response to the terminal 1. Step 223: The terminal 1 switches the uplink and sends a data packet on the ProSe bearer. Step 224: The terminal 2 switches the uplink and sends a data packet on the ProSe bearer. Through this process, the ProSe communication link is successfully established.

 It should be noted that, in steps 215, 216, and 217, if the base station decides that the ProSe resource does not need to be allocated, the base station can directly associate the wireless channel of the terminal 1 with the wireless channel of the terminal 2, so that all data packets can be directly forwarded through the base station. , no need to go through the core network.

 In addition, the data link switching of the terminal, that is, step 223 and step 224, may be performed by the core network.

Steps 219 and 222 of the NAS message are triggered; after the terminal 1 and the terminal 2 allocate the radio resources in steps 215 and 216, it is determined whether the communication can be started by the wireless discovery process between each other, and if the communication can be started, the communication is performed. Data link switching, without waiting for NAS messages from the core network.

 If terminal 1 and terminal 2 are under the same ProSe server, then steps 208 and 220 can be saved.

 Figure 7 shows the process of directly negotiating ProSe resources and establishing ProSe communication between terminals in the case of network coverage, including:

In step 301, the ProSe terminal 1 registers with the ProSe server 1 to obtain the ProSe ID1; the ProSe terminal 2 registers with the ProSe server 2 to obtain the ProSe ID2. Through the application layer interaction, the ProSe terminal 1 and the ProSe terminal 2 start data communication. In the process, the terminal is idle The state migrates to the connected state, and the new bearer is built according to the requirements. The terminal saves the packet filter, the packet filter uniquely identifies a data stream, and the terminal uses the data flow template (TFT, Traffic Flow Template) to uniquely map the data stream. To the bearer. When the terminal is in the connected state, the base station and the ProSe server store the QoS and bearer identifier of the bearer built by the terminal.

 Step 302: The ProSe terminal 1 and the ProSe terminal 2 discover that the ProSe communication is initiated by the ProSe discovery process and the neighboring area is found.

 This process can be performed prior to the actual data communication, where a discovery process is repeated before the ProSe communication is actually initiated to ensure that the terminal is indeed in the vicinity.

 Step 303: The terminal 1 initiates a ProSe communication request to the ProSe server 1, where the data flow identifier of the data stream establishing the ProSe communication is carried.

 The ProSe communication request may use a new ProSe resource to establish a message; or modify the original UE to initiate a bearer resource message with a new ProSe indication.

 Step 304: The ProSe server 1 initiates a bearer resource command message to the packet gateway, where the data flow identifier sent by the terminal 1 carries the ProSe indication. Here, the packet gateway refers to the P-GW, and the S-GW transparently transmits the bearer resource command message to the P-GW.

 Step 305: The packet gateway processes the bearer resource command message, and finds that a ProSe communication needs to be established for the data flow identifier, and then allocates QoS and performs resource authorization, and sends a new bearer request to the ProSe server 1, requesting to create a new ProSe bearer, where the new bearer is carried. Beared QoS and corresponding TFT.

 In this step, the packet gateway can also adjust the QoS of the original bearer according to the calculation, and initiate a modification process on the original bearer.

 Step 306: The ProSe server 1 allocates a bearer identifier for the new ProSe bearer, and the ProSe server 1 generates a NAS message, where the message carries a TFT and a bearer identifier. The ProSe server 1 initiates a new bearer request to the base station, which carries the requested QoS, ProSe indication, and NAS message.

Step 307, the base station finds that the new bearer is a ProSe bearer, and then the base station allocates ProSe to the terminal 1. The data bearer resource is allocated, the resource is allocated to the terminal 1, and the NAS message of the terminal 1 is sent to the terminal 1; the terminal 1 returns a response to the base station.

 Step 308: The base station returns a bearer setup response to the ProSe server 1.

 Step 309, the ProSe server 1 returns a new bearer response to the packet gateway; the packet gateway deletes the data flow of the terminal 1 indicated in step 304 from the original core network bearer.

 Step 310: The terminal 1 negotiates the ProSe resource through the data channel between the core network bearer and the terminal 2 established in step 301, and sends the ProSe resource of the terminal 1 and the corresponding data stream identifier to the terminal 2.

 Step 311: The terminal 2 finds the data flow identifier of the associated terminal 2 according to the data flow identifier of the terminal 1, and then initiates a ProSe resource setup request to the ProSe server 2, where the data stream identifier of the ProSe communication is carried.

 The ProSe resource establishment request may use a new ProSe resource to establish a message; or modify the original UE to initiate a bearer resource message with a new ProSe indication.

 Step 312: The ProSe server 2 initiates a bearer resource command message to the packet gateway, where the data flow identifier sent by the terminal 2 and the ProSe indication are carried. Here, the packet gateway refers to the P-GW, and the S-GW generally transparently transmits the bearer resource command message to the P-GW.

 Step 313: The packet gateway processes the bearer resource command message, and finds that a ProSe communication needs to be established for the data flow identifier, and then allocates QoS and performs resource authorization, and sends a new bearer request to the ProSe server 2, requesting to create a new ProSe bearer, where the new bearer is carried. Beared QoS and corresponding TFT.

 In this step, the packet gateway can also adjust the QoS of the original bearer according to the calculation, and initiate a modification process on the original bearer.

 Step 314: The ProSe server 2 allocates a bearer identifier for the new ProSe bearer, and generates a NAS message with a TFT. The ProSe server 2 initiates a bearer setup request to the base station, which carries the requested QoS, ProSe indication, and NAS message.

Step 315, the base station finds that the new bearer is a ProSe bearer, and the base station allocates ProSe to the terminal 2. The transmitting data packet carries the resource, allocates the resource to the terminal 2, and transmits the NAS message of the terminal 2 to the terminal 2; the terminal 2 returns a response to the base station.

 Step 316: The base station returns a bearer setup response to the ProSe server 2.

 Step 317, the ProSe server 2 returns a new bearer response to the packet gateway; the packet gateway deletes the data flow of the terminal 1 indicated in step 312 from the original core network bearer.

 Step 318, the terminal 2 sets the received data packet resource of the newly-built ProSe bearer to the ProSe-issued data packet resource of the terminal 1, and then the terminal 2 returns the ProSe resource of the terminal 2 to the terminal 1 through the core network bearer established in step 301; After that, the received packet resource of the corresponding ProSe bearer is set as the sent packet resource of the terminal 2.

 Step 319: The terminal 1 switches the uplink and sends a data packet on the ProSe resource. Step 320: The terminal 2 switches the uplink and sends a data packet on the ProSe resource. Through this process, the ProSe communication link is successfully established.

 In this embodiment, the terminal 1 and the terminal 2 may be located under the same ProSe server, and the ProSe server 1 and the ProSe server 2 are combined.

 Figure 8 shows the process of directly negotiating ProSe resources and establishing ProSe communication between terminals without network coverage, including:

 In step 401, the terminal 1 first receives the broadcast signal of the terminal 2, which carries the ProSe ID2 of the terminal 2, and finds that the terminal 2 is currently in the vicinity, and then decides to initiate the ProSe communication. The discovery signal of the terminal 2 includes the communication resource for the terminal 2 to perform signaling negotiation, or the communication resource negotiated by the signaling is statically allocated on the terminal 1 and the terminal 2.

 Step 402: The terminal 1 first determines its own ProSe communication resource, that is, the resource of the sent data packet, and the resource can be selected by the terminal through static configuration, or is allocated by the base station in the case of the previous coverage. Then, the terminal 1 uses the terminal 2 to discover the signaling negotiation communication resources in the signal, and transmits a ProSe communication request to the terminal 2.

Step 403: After receiving the ProSe communication request, the terminal 2 determines whether to accept the ProSe communication. If yes, configures the resource of the received data packet to be the ProSe resource of the terminal 1; The ProSe communication resource, that is, the resource of the transmitted data packet, which can be statically configured, or last allocated by the base station in the case of coverage. Then, a ProSe communication response is transmitted to the terminal 1.

 Step 404: After receiving the response, the terminal 1 configures the resource of the received data packet to be the ProSe resource of the terminal 2, and then sends the data packet on the ProSe communication resource of the terminal 1.

 Step 405: After receiving the data packet of step 404, the terminal 2 returns a data packet to the terminal 1. Through the above steps, the communication resources of the ProSe are negotiated between the terminal 1 and the terminal 2, and ProSe communication can be performed.

 In another embodiment of the present embodiment, the terminal 2 directly broadcasts the radio resource directly communicating with the terminal in the broadcast signal, so that the terminal 1 can directly perform the radio resource with the terminal 2 without receiving negotiation after receiving the radio resource. Direct communication.

 In summary, in the embodiment of the present invention, the ProSe server where the terminal is located requests the base station to allocate the radio resource of the direct connection communication bearer, and the terminal establishes the direct communication communication bearer based on the radio resource allocated by the base station; The process is negotiated to directly connect the radio resources carried by the communication, and establish a direct communication bearer based on the negotiated radio resources. Thereby, the establishment of direct communication between ProSe terminals is realized.

 Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention can take the form of a hardware embodiment, a software embodiment, or a combination of software and hardware aspects. Moreover, the invention can take the form of a computer program product embodied on one or more computer usable storage media (including but not limited to disk storage and optical storage, etc.) including computer usable program code.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Realize A means of function specified in a flow or a flow and/or a block diagram of a block or blocks.

 The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

 These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

 The embodiment of the invention further provides a computer readable storage medium, the storage medium comprising a method.

 The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

Claims

Claim
 A method for establishing direct communication of a terminal, the method comprising:
 The source terminal sends a direct connection communication request to the core network server where it is located, where the communication target identifier is carried, and the data flow identifier of the direct connection communication is desired to be established;
 The core network server where the source terminal is located sends the establishment direct connection communication request to the core network server where the target terminal is located according to the communication target identifier;
 The core network server requests the base station to allocate a radio resource of the direct communication bearer; and the source terminal and the target terminal establish a direct communication bearer bearer based on the radio resource allocated by the base station.
 2. The method for establishing direct communication of a terminal according to claim 1, wherein the method further comprises:
 And the core network server sends the received data flow identifier to the packet gateway by using a bearer modification command, where the bearer indicates that the direct communication communication bearer is established;
 The packet gateway initiates a new bearer process to the core network server, and establishes a direct communication bearer for the corresponding data stream.
 3. The method for establishing direct communication of a terminal according to claim 1, wherein the method further comprises:
 After receiving the request for establishing a direct connection communication, the core network server, where the target terminal is located, sends a message to the target terminal, and the source terminal is notified to initiate the establishment of a direct communication request, and the message carries the message. The data flow identifier requested by the source terminal.
 4. The method for establishing direct communication of a terminal according to claim 3, wherein the method further comprises:
The target terminal finds a data flow identifier in the corresponding target terminal according to the data flow identifier requested by the source terminal, and sends a direct connection communication request to the server where the target terminal is located, where the data of the target terminal is carried. Stream ID. The method for establishing a direct communication of a terminal according to claim 1, wherein the method further comprises:
 The base station allocates an association identifier to the source terminal context, and sends the association identifier to the core network server. The core network server requests the base station to allocate a radio resource to the target terminal, and the base station finds the context of the source terminal according to the association identifier.
 The method for establishing direct communication of a terminal according to claim 1, wherein the method further comprises:
 When the base station directly connects to the radio resource carried by the communication, the base station sends the data packet resource of the source terminal as the data packet resource of the target terminal to the target terminal, and uses the data packet resource of the target terminal as the data received by the source terminal. A packet resource is allocated to the source terminal.
 7. The method for establishing direct communication of a terminal according to claim 6, wherein the method further comprises:
 After receiving the request from the core network server, the base station establishes a connection from the wireless link of the source terminal to the wireless link of the target terminal within the base station.
 8. The method for establishing direct communication of a terminal according to claim 2, wherein the method further comprises:
 After the base station allocates the radio resources of the direct connection communication bearer of the source terminal and the target terminal, the base station notifies the core network server; the core network server returns a response to the packet gateway, and the packet gateway sends the corresponding data requested by the terminal. The stream is removed from the core network bearer.
 9. A method for establishing direct communication of a terminal, the method comprising:
 The source terminal and the target terminal respectively obtain the radio resources carried by the direct connection communication; the source terminal and the target terminal notify each other of the radio resources of the direct communication communication through the data channel, and establish a relationship between the source terminal and the target terminal. Direct communication.
 The method for establishing direct communication of a terminal according to claim 9, wherein the source terminal and the target terminal obtain radio resources directly connected to the communication according to the static configuration.
The method for establishing direct communication of a terminal according to claim 9, wherein the source terminal The terminal and the target terminal dynamically allocate radio resources carried by the direct communication from the network.
 The method for establishing a direct communication of a terminal according to claim 11, wherein the method further comprises:
 The source terminal and the target terminal send a direct connection communication request to the core network server where the source terminal and the target terminal carry, and carry the data flow identifier indicating that the direct communication communication bearer is established and the direct communication is desired to be established.
 The method for establishing a direct communication of a terminal according to claim 12, wherein the method further comprises:
 The core network server sends the received data stream identifier to the packet gateway by using a message, where the packet carries a direct connection communication bearer indication; the packet gateway initiates a new bearer process to the core network server, and identifies the data indicated by the data flow identifier. The flow creates a new direct communication bearer.
 The method for establishing a direct communication of a terminal according to claim 13, wherein the method further comprises:
 The core network server requests a base station to allocate a direct communication communication bearer, and the base station allocates, to the source terminal and the target terminal, a radio resource of a transmission data packet of a direct communication communication bearer.
 The method for establishing a terminal direct communication according to claim 14, wherein the method further comprises:
 The base station notifies the core network server after allocating the radio resources of the direct communication bearer; the core network server returns a response to the packet gateway, where the packet gateway requests the corresponding data stream requested by the source terminal and the target terminal Deleted in the core network bearer.
 The method for establishing direct communication of a terminal according to claim 9, wherein the data channel comprises a data channel passing through the core network between the source terminal and the target terminal.
 The method for establishing a direct communication of a terminal according to claim 9, wherein the method further comprises:
 The source terminal obtains the data channel radio resource negotiated by the resource or the radio resource directly communicated from the broadcast signal of the target terminal.
18. A core network server, comprising: The receiving module is configured to receive a direct communication request of the source terminal, and obtain a data flow identifier that is desired to establish direct communication;
 The requesting module is configured to, according to the data flow identifier, request the packet gateway to establish a direct communication bearer for the corresponding data flow, and request the base station to allocate the radio resource directly connected to the communication bearer.
 The core network server according to claim 18, wherein the requesting module is further configured to: request, from the packet gateway, to delete the data stream corresponding to the data stream identifier from the core network bearer.
 The core network server according to claim 18 or 19, wherein the core network server where the source terminal is located receives the data flow identifier from the source terminal, and sends a direct connection communication request to the target terminal according to the communication target identifier. The target core network server.
 The core network server according to claim 18 or 19, wherein the core network server where the source terminal is located requests the base station to allocate the radio resource of the direct communication bearer, and after obtaining the allocated association identifier from the base station, The associated identifier is sent to the core network service where the target terminal is located.
 22. A base station, comprising:
 The resource allocation module is configured to allocate the data packet resource of the source terminal as the data packet resource of the target terminal to the target terminal, and allocate the data packet resource of the target terminal as the data packet resource of the source terminal to the Describe the source terminal.
 The base station according to claim 22, wherein the base station of the source terminal further comprises: an association identifier allocation module, configured to allocate an association identifier, and send the association identifier to the base station of the target terminal through the core network server, where The base station of the target terminal finds the context of the source terminal according to the association identifier.
 24. A terminal, comprising:
 a radio resource acquisition module, configured to obtain a radio resource carried by the direct communication;
 The direct connection communication establishing module is configured to notify each other of the wireless resources of the direct communication communication between the communication peers through the data channel, and establish direct communication with the communication peer end.
The terminal according to claim 24, wherein the direct connection communication establishing module is further configured Therefore, the terminal sends the data packet resource to the communication peer, receives the data packet resource of the communication peer, and uses the data packet resource of the communication peer as its own data packet resource.
 The terminal according to claim 24, wherein the radio resource acquisition module is further configured to obtain a radio resource directly connected to the communication bearer according to the static configuration, or dynamically allocate the radio resource of the direct communication bearer from the network.
 The terminal according to claim 24, wherein the terminal transmits the data channel radio resource negotiated by the resource or the directly communicated radio resource by using a broadcast signal.
 28. A computer readable storage medium, comprising: a set of instructions for performing the method of any of claims 1-8.
 A computer readable storage medium, comprising: a set of instructions for performing the method of any one of claims 9-17.
PCT/CN2013/089997 2013-04-22 2013-12-19 Terminal direct communication establishment method, server, base station and terminal WO2014173152A1 (en)

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