WO2014154014A1

WO2014154014A1 - Method and system for obtaining serving base station information about user equipment

Info

Publication number: WO2014154014A1
Application number: PCT/CN2014/000095
Authority: WO
Inventors: 刘玉兰; 陈琳; 黄莹; 罗宇民; 马书宇; 谢峰; 鲁照华
Original assignee: 中兴通讯股份有限公司
Priority date: 2013-03-25
Filing date: 2014-01-24
Publication date: 2014-10-02
Also published as: CN104080075B; CN104080075A

Abstract

A method and system for obtaining serving base station information about a user equipment. The method comprises: according to indication information, a network element obtaining a serving base station identifier of a target user equipment (UE), the network element being any one of the following devices: a UE, a base station, a mobile management entity (MME), a D2D register server (DRS) and a network management system.

Description

Method and system for acquiring user equipment service base station information

Technical field

The present invention relates to the field of communications technologies, and in particular, to a method and system for acquiring user equipment serving base station information.

Background technique

With the development of wireless multimedia services, the demand for high data rates and user experiences is increasing, which places high demands on the system capacity and coverage of traditional cellular networks. On the other hand, the popularity of social networking, near-field data sharing, local advertising, and other applications has led to an increase in the need to communicate with and communicate with people or things that interest nearby (Proximity Services). The traditional base station-centric cellular network has obvious limitations in high data rate and local service support. In the context of this demand, D2D (Device-to-Device, device to the new direction of future communication technology development) Equipment) technology came into being. The application of D2D technology can reduce the burden of cellular networks, reduce the battery power consumption of user equipment, increase the data rate, and improve the robustness of the network infrastructure, which satisfies the requirements of the above high data rate services and neighboring service services.

D2D technology can work in licensed or unlicensed frequency bands, allowing multiple D2D-enabled user equipment (D2D User Equipment, D2D UE) to directly discover without network infrastructure or network infrastructure. /Direct communication, D2D technology usage scenarios can be divided into LTE network coverage and LTE-free network coverage, including at least the following scenarios: 1) Commercial/social use, including voice and data communication, data communication and Subdivided into information sharing, information push and information interaction; 2) network offload, when the network load is large, the system converts the communication between the adjacent user equipment (User Equipment, UE for short) into D2D for communication; Communication does not go through the core network and is directly routed through the base station; 3) Public safety, applicable to the public safety spectrum, used without network coverage; 4) Extended coverage, such as relay, at the edge of the network, the signal may be poor A UE that is closer to the base station can be used as a relay to assist the edge user in communicating. D2D technology includes two parts: D2D discovery and D2D communication. D2D discovery refers to the discovery of neighboring terminals capable of D2D communication, and D2D communication, that is, data transmission between terminals. In the D2D discovery process, for the sake of security, each UE can also be assigned a discovery identifier (discovery ID). The area where the ID is valid is called the discovery area, and each discovery area also has a discovery area identifier (discovery area ID).

Under the coverage of LTE network, the network side (including base station, MME, etc.) can assist the terminal to perform D2D discovery and communication, and realize management and control of D2D discovery and communication. In this case, the control signaling between the two UEs participating in the D2D discovery and communication interacts between the serving base stations corresponding to the two UEs. For example, in the D2D discovery process controlled by the base station, if the discovery message is sent by the UE, the second user equipment (UE2) listens to the discovery signal sent by the first user equipment (UE1), and responds with a response message, and the response message is sent by the UE2. The serving base station forwards to the serving base station of UE1, and finally forwards it to UE1, so that UE1 discovers UE2; if it is to initiate discovery of the UE to listen for the discovery signal, UE1 monitors the discovery signal sent by UE2, and UE1 sends a verification message to its own serving base station, which is UE1. The serving base station forwards the verification message to the serving base station of the UE2 to verify whether the UE2 can be found. If the UE2 can be found to be discovered, the serving base station of the UE2 sends a verification confirmation message to the serving base station of the UE1, and then forwards it to the UE1, so that the UE1 discovers the UE2. . In the D2D communication process controlled by the base station, the UE1 sends a D2D connection setup request message to its own serving base station, requesting to establish a D2D communication connection with the UE2, and after receiving the message, the serving base station of the UE1 forwards the message to the service of the UE2. The base station is finally forwarded by the serving base station of UE2 to UE2. If UE2 determines that D2D communication can be performed, the response message of the reply also passes through the serving base station of UE2 and the serving base station of UE1, and finally forwards to UE1 to implement establishment of a D2D communication connection between UE1 and UE2.

There are two scenarios depending on the location of the serving base station where the two UEs participating in the D2D discovery and communication are located. One is that two UEs are served by the same base station, as shown in Figure 1. In this scenario, the signaling messages between UEs can be forwarded by one base station, but the base station is also required to determine whether both UEs are in their own serving cell. The other is that two UEs are served by different base stations, as shown in Figure 2. In this scenario, the serving base station of UE1 needs to know the serving base station corresponding to UE2 before forwarding the signaling message. In the related standard, only the MME can know the location of the UE, that is, the base station serving cell corresponding to the connected state UE or the tracking area corresponding to the idle state UE. If the UE is in the idle state, the MME needs to page the UE within the tracking area corresponding to the UE to find the location of the UE, and obtain the serving base station identifier where the UE is located. This method requires sending a lot of signaling messages, resulting in a long signaling path, excessive network overhead, heavy load, and large delay, which cannot reflect the advantages of D2D. Summary of the invention

The embodiment of the invention provides a method and a system for acquiring information about a user equipment serving base station, and solves the problem that the method for acquiring the location of the UE causes a long signaling path, a large network overhead, a heavy load, and a large delay.

A method for obtaining information about a base station of a user equipment service, including:

The network element obtains the serving base station identifier of the target UE according to the indication information, where the network element is any one of the following devices:

UE, base station, MME, device to device D2D registration server (DRS), and network management system.

Optionally, the acquiring, by the network element, the serving base station identifier of the target UE according to the indication information, includes: obtaining, by the network element, the serving base station identifier of the target UE according to the discovery signal or the discovery signal response message sent by the target UE.

Optionally, the acquiring, by the network element, the serving base station identifier of the target UE according to the discovery signal or the discovery signal response message sent by the target UE, including:

Receiving, by the network element, the discovery signal or the discovery signal response message sent by the target UE, parsing the information carried by the discovery signal or the discovery signal response message from the discovery signal or the discovery signal response message, and acquiring according to the information The serving base station identifier of the target UE.

Optionally, the network element receives the discovery signal or the discovery signal response message sent by the target UE, where the network element directly receives the discovery signal or the discovery signal response message from the target UE, or forwards through another network element. Indirectly receiving the discovery signal or the discovery signal response message.

The other network element includes other UEs, base stations, MMEs, DRSs, and network management systems other than the target UE.

Optionally, the information carried in the discovery signal or the discovery signal response message is information indicating a service base station identifier, and the information indicating the identifier of the serving base station includes any one or any of the following information:

Base station identity (eNB ID), globally unique cell identity (ECGI), physical cell identity (PCI), and IP address. Optionally, the information carried by the discovery signal or the discovery signal response message is a resource of the discovery signal or the discovery signal response message, and the resource of the discovery signal or the discovery signal response message includes a time domain involved in the discovery signal, Frequency domain and code domain.

Optionally, the obtaining, by the network element, the serving base station identifier of the target UE, according to the information, the acquiring, by the network element, the discovery signal sent by the target UE or the resource and base station identifier of the discovery signal response message, from the locally saved information. Mapping relationship, or,

The network element acquires, from other network elements, a mapping relationship between the discovery signal sent by the target UE or the resource of the discovery signal response message and the identifier of the base station;

Obtaining, by the network element, a serving base station identifier of the target UE according to a mapping relationship between a resource of the discovery signal or the discovery signal response message and the identifier of the base station;

The other network elements include a UE, a base station, an MME, a DRS, and a network management system.

Optionally, the foregoing method for obtaining user equipment serving base station information includes:

Negotiating by neighboring base stations, each base station allocates a resource set, and UEs served by different base stations use different resources to send discovery signals or discovery signal response messages, and the resources served by each base station UE transmit discovery signals or discovery signal response messages. The base station has a one-to-one correspondence, and the one-to-one correspondence constitutes a mapping relationship between a resource for transmitting a discovery signal or a discovery signal response message of the UE and the base station;

The resources of the discovery signal or the discovery signal response message are allocated by any of the following devices: a base station, an MME, a D2D registration server, and a network management system.

Optionally, the acquiring, by the network element, the serving base station identifier of the target UE according to the indication information, includes: obtaining, by the network element, the serving base station identifier of the opposite UE according to the discovery area identifier (the discovery area ID) of the target UE;

The discovery area ID is carried in any of the following messages:

A discovery signal, a discovery signal response message, a D2D connection establishment request message, and a paging message. Optionally, the acquiring, by the network element, the serving base station identifier of the peer UE according to the discovery area ID of the target UE, including:

Obtaining, by the network element, the mapping between the discovery area ID and the base station identifier from locally saved information Department, or,

Obtaining, by the network element, the mapping relationship between the discovery area ID and the base station identifier from another network element; the network element acquiring, according to the mapping relationship between the discovery area ID and the base station identifier, the service base station identifier of the target UE, and

Optionally, the acquiring, by the network element, the serving base station identifier of the target UE according to the mapping relationship between the discovery area ID and the base station identifier, including:

When the mapping relationship between the discovery area ID and the base station identifier is that one discovery area ID corresponds to one base station, or one discovery area ID corresponds to one or more cells below one base station, the network element directly according to the discovery area ID, And deriving the serving base station identifier of the target UE; and when the mapping relationship between the discovery area ID and the base station identifier is that the discovery area ID corresponds to multiple base stations or cells under multiple base stations, the network element is based on the discovery The area ID and the auxiliary information are used to derive a serving base station identifier of the target UE, and the auxiliary information includes a discovery ID.

Optionally, the discovery area ID is allocated by a base station, an MME, a D2D registration server, a network management system, or other network element.

Optionally, the discovery area ID is allocated by the base station to negotiate between the base stations, and the target UE is allocated a discovery area ID that does not conflict with the discovery area ID corresponding to the neighboring base station.

Optionally, the acquiring, by the network element, the serving base station identifier of the target UE according to the indication information, including: obtaining, by the network element, the serving base station identifier of the target UE according to the discovery identifier (discovery ID) of the target UE;

The discovery ID is carried in any of the following messages:

A discovery signal, a discovery signal response message, a D2D connection establishment request message, and a paging message. Optionally, the acquiring, by the network element, the serving base station identifier of the target UE according to the discovery ID of the target UE, includes:

Obtaining, by the network element, the mapping relationship between the discovery ID of the target UE and the identifier of the base station, or

Obtaining, by the network element, the mapping between the discovery ID of the target UE and the identifier of the base station from other network elements Department

Obtaining, by the network element, a serving base station identifier of the target UE according to a mapping relationship between the discovery ID and a base station identifier;

The other network elements include a UE, a base station, an MME, a DRS, and a network management system. Optionally, the foregoing method for obtaining user equipment serving base station information includes:

When the UE is assigned a discovery ID, the UEs in the neighboring base stations are allocated different discovery ID sets by the base station negotiation, and each discovery ID corresponds to the uniquely determined base station identifier; or

When the UE is assigned a discovery ID, the MME allocates different discovery ID sets to the UEs in the neighboring base stations, and each discovery ID corresponds to the uniquely determined base station identifier; or

When the UE is assigned a discovery ID, the D2D registration server allocates different discovery ID sets to the UEs in the neighboring base stations, and each discovery ID correspondingly determines the base station identifier; or

When the UE is assigned a discovery ID, the network management system allocates different discovery ID sets to the UEs in the neighboring base stations, and each discovery ID correspondingly determines the base station identifier.

Optionally, the D2D registration server is an independent network element, or is in the same network element as the base station or the MME or the network management system or other nodes.

The embodiment of the present invention further provides a method for acquiring user equipment serving base station information, including: the network element obtains a serving base station identifier of a target user equipment (UE) by sending a paging message; and

The network element is any of the following devices:

UE, base station, mobility management entity (MME), and device-to-device D2D registration server (DRS).

Optionally, the network element is a source UE, and the network element obtains a serving base station identifier of the target UE by sending a paging message, including:

The source UE carries a paging message to the peer network element in the discovery signal, where the paging message includes the identifier of the target UE, and the peer network element is any one of the following devices:

Target UE, base station, MME, D2D registration service base station, and network management system, The identifier of the target UE includes: a Short Format Temporary Mobile Subscriber Identity (S-TMSI), an International Mobile Subscriber Identity (IMSI), a Globally Unique Temporary Identity (GUTI), a Discovery Identity (Discovery ID), and an Internet Protocol (IP). address;

Receiving, by the source UE, a paging response message sent by the peer network element, where the paging response message carries the serving base station identifier of the target UE;

The manner in which the source UE sends the discovery signal is broadcast or unicast or multicast.

Optionally, after the source UE carries the paging message to the peer network element, the source UE further includes:

The target UE monitors that the discovery signal sent by the source UE carries a paging message, and determines whether the paging message is paging the target UE;

When the source UE is determined to call the target UE, the target UE replies to the source UE with a paging response message, and carries the own serving base station identifier in the paging response message;

The target UE ignores the paging message when it is determined that the source UE is not calling the target UE.

Optionally, the target UE that listens to the discovery signal sent by the source UE carries a paging message, and determines whether the paging message is to page the target UE, including:

The target UE determines whether the UE identifier carried in the paging message matches the UE identity of the target UE itself; the UE identifier includes an S-TMSI, an IMSL GUTL discovery ID, and an IP address;

When matching, the target UE determines that the paging message is paging the target UE itself; when there is no match, the target UE determines whether the paging message is paging the target UE itself.

Optionally, the target UE replies to the source UE with a paging response message, including: the target UE directly replies to the source UE with a paging response message; or

The target UE forwards the paging response message to the source UE through a base station and/or a MME and/or a D2D registration server and/or a network management system.

Optionally, the target UE replies to the source UE with a paging response message, including: Determining, by the target UE, a type of state in which the target UE is located, where the target UE is in a connected state and an idle state;

The target UE performs a corresponding operation according to the type of the state in which it is located.

Optionally, the target UE performs a corresponding operation according to the type of the state in which the UE is located, including:

When the target UE is in the connected state, the target UE sends a paging response message to its serving base station after receiving the paging message.

When the target UE is in an idle state, the target UE randomly accesses its own serving base station after receiving the paging message;

After receiving the random access message of the target UE, the serving base station of the target UE sends a paging response message to the serving base station of the source UE;

After receiving the paging response message, the serving base station of the source UE sends a paging response message to the source UE.

Optionally, after receiving the paging message, the target UE randomly accesses the serving base station, including:

After receiving the paging message, the target UE immediately performs a random access procedure and/or a reply paging response message; or

After receiving the paging message, the target UE performs a random access procedure and/or a reply paging response message in a TAU procedure, such as a tracking area update (TAU) period, where the paging response message is random. Access message or TAU message or air interface message.

Optionally, the network element is a base station, and the network element obtains the service base station identifier of the target UE by sending a paging message, including:

The base station sends a paging message to the neighboring base station on the interface (X2 interface) between the base station and the base station, and the paging target UE includes all the base stations having the X2 interface with the base station or the same base station as the base station. The base station and the base station having the X2 interface, the paging message includes an identifier of the target UE, and the identifier of the target UE includes any one or any of the following information: S-TMSL IMSL GUTL discovery ID, and IP address;

The base station receives the paging response message returned by the neighboring base station, where the paging response message carries the serving base station identifier of the target UE.

Optionally, the paging message is a D2D paging message.

Optionally, after the base station sends the paging message to the neighboring base station on the X2 interface, the method further includes: after receiving the paging message, the neighboring base station acquires a state of the target UE, according to Performing a paging operation in a state in which the target UE is located, where the target UE is in a connected state and an idle state; or

The neighboring base station directly performs a paging operation after receiving the paging message.

Optionally, obtaining the status of the target UE includes:

The neighboring base station searches for a state in which the target UE that is locally saved is located; or

Obtaining, by the neighboring base station, a state in which the target UE is located from the paging message; or, the neighboring base station acquires a state of the target UE from a message on an X2 interface sent by the base station, where The message on the X2 interface includes: a base station configuration update message, a base station configuration update acknowledgement message, a handover request message, and a handover confirmation message.

Optionally, before the base station sends the paging message to the neighboring base station on the X2 interface, the method further includes: obtaining, by the base station, a state in which the target UE is located, and acquiring, by the base station, the UE served by the base station by using an air interface message. The air interface message includes an air interface message of the cellular communication, and the air interface message of the cellular communication includes: a random access message, a radio resource control (RRC) connection request message, an RRC connection setup complete message, an RRC connection reestablishment request message, and an RRC connection. The rebuild complete message, and the RRC connection reconfiguration complete message.

Optionally, the air interface message further includes: a D2D connection establishment request message and a D2D page request message.

The target UE sends the status of the target UE to other network elements in a discovery signal (beacon signal).

Optionally, the performing the paging operation according to the state in which the target UE is located includes: When the target UE is in the connected state, the neighboring base station checks whether the target UE saves the serving base station information of the target UE in the serving cell of the neighboring base station or in the neighboring base station,

When the target UE saves the serving base station information of the target UE in the serving cell of the neighboring base station or in the neighboring base station, the neighboring base station sends a paging response message to the base station, where The paging response message includes a serving base station identifier of the target UE, or indicates that the target UE is in the base station's own serving cell;

When the target UE is in an idle state, the neighboring base station pages the target UE in its own serving cell.

Optionally, after the step of performing the paging operation by the neighboring base station, the method further includes:

When the target UE is in the serving cell of the neighboring base station, the target UE immediately performs a random access procedure and/or a reply paging response message after receiving the paging message sent by the neighboring base station; or

And performing a random access procedure and/or a reply response message in the TAU process when the target UE is in the serving cell of the neighboring base station, when the TAU period of the target UE or the like arrives;

The paging response message is a random access message or a TAU message or an air interface message.

Optionally, the network element is a base station, and the network element obtains a serving base station identifier of the target UE by sending a paging message, including:

The base station sends a paging message to the MME on the interface (S1 interface) between the base station and the packet core network to page the target UE, where the paging message includes the identifier of the target UE, and the identifier of the target UE Includes S-TMSI, IMSL GUTL Discovery ID, and IP address.

Optionally, the paging message further includes a state in which the target UE is located, and the state in which the target UE is located includes an idle state and a connected state.

Optionally, the base station sends a paging message to the MME on the S1 interface, and after paging the target UE, the method further includes:

After receiving the paging message sent by the base station, the MME performs a paging operation.

Optionally, after the MME receives the paging message sent by the base station, performing the paging operation includes: Determining, by the MME, that the serving base station information of the target UE is saved; and when the MME saves the serving base station information of the target UE, the MME directly sends a paging response message to the base station, where The paging response message carries the serving base station identifier of the target UE.

Optionally, after the MME determines whether the MME saves the serving base station information of the target UE, the MME further includes:

When the MME does not save the serving base station information of the target UE, the MME determines a paging area, and sends a paging message in the paging area, where the paging area includes:

The neighboring cells of the source base station, and the serving cells of other base stations in the same discovery area as the source base station.

Optionally, the MME determines a paging area, and after the step of sending the paging message in the paging area, the method further includes:

After receiving the paging message sent by the MME, the target UE randomly accesses the serving base station cell of the target UE, and/or sends a paging response to the serving base station of the target UE;

The serving base station of the target UE sends a paging response message to the base station.

After receiving the paging message, the target UE randomly accesses a serving base station cell of the target UE, and/or sends a paging response message to a serving base station of the target UE;

The serving base station of the target UE sends a paging response message to the MME, and the MME forwards the paging message to the base station.

The embodiment of the present invention further provides a method for acquiring user equipment serving base station information, including: the network element obtains the serving base station identifier of the target user equipment (UE) by sending a query request message to the device to the device D2D registration server (DRS). ; as well as

The network element is any of the following devices: UE, base station, and mobility management entity (MME).

Optionally, the query request carries the identifier of the target UE, and the identifier of the target UE is any one or any of the following information:

Short format temporary mobile subscriber identity (S-TMSI), International Mobile Subscriber Identity (IMSI), Globally Unique Temporary Identity (GUTI), and Discovery Identity (Discovery ID).

Optionally, the D2D registration server saves the serving base station information of the D2D UE, is an independent network element, or is in the same network element as the base station or the MME or the network management system or other nodes.

Optionally, the query request message carries a cell (IE) indicating that the serving base station identifier of the target UE is queried.

Optionally, after the network element sends the query request message to the D2D registration server to obtain the serving base station identifier of the target UE, the method further includes:

Determining, by the D2D registration server, whether the serving base station information of the target UE is saved; when the result of the determination is that the serving base station information of the target UE is saved, the D2D registration server sends an inquiry response message to the network element;

When the result of the determination is that the serving base station information of the target UE is not saved, the D2D registration server sends a query failure message to the network element, or triggers a paging procedure, or does not perform an operation.

Optionally, the query response message carries an IE indicating that the serving base station identifier of the target UE is queried.

Optionally, the query failure message carries an IE indicating that the serving base station identifier of the target UE is failed to be queried.

Optionally, the D2D registration server triggers a paging process, where the D2D registration server sends a paging message or a paging indication message to the base station or the MME, and triggers the base station or the MME to page the target UE.

The embodiment of the present invention further provides a system for acquiring user equipment serving base station information, including: a network element and a target UE;

The network element is configured to acquire a serving base station identifier of the target UE according to the indication information; the network element is any one of the following devices: UE, base station, mobility management entity (MME), device-to-device D2D registration server (DRS), and network management system.

Optionally, the network element is configured to receive a discovery signal or a discovery signal response message sent by the target UE, and parse the information carried by the discovery signal or the discovery signal response message from the discovery signal or the discovery signal response message, And obtaining, according to the information, a serving base station identifier of the target UE.

Optionally, the network element is configured to acquire, according to the discovery area ID of the target UE, a serving base station identifier of the opposite UE.

The discovery area ID is carried in any of the following messages:

A discovery signal, a discovery signal response message, a D2D connection establishment request message, and a paging message. Optionally, the network element is configured to acquire a serving base station identifier of the target UE according to the discovery ID of the target UE;

The discovery ID is carried in any of the following messages:

A discovery signal, a discovery signal response message, a D2D connection establishment request message, and a paging message.

The network element is configured to acquire a serving base station identifier of the target UE by sending a paging message; and

The network element is any of the following devices:

Optionally, the network element is configured to carry a paging message in the discovery signal and send the message to the peer network element, where the paging message includes the identifier of the target UE, where the peer network element is any one of the following devices. : a target UE, a base station, an MME, a D2D registration service base station, and a network management system; the identifier of the target UE includes: a short format temporary mobile subscriber identity (S-TMSI), an international mobile subscriber identity (IMSI), and a globally unique temporary Identification (GUTI), discovery identification (discovery ID), And an internet protocol (IP) address;

Receiving a paging response message sent by the peer network element, where the paging response message carries the serving base station identifier of the target UE.

Optionally, the target UE is configured to carry a paging message in the discovery signal sent by the network element, and determine whether the paging message is to page the target UE,

When determining that the network element calls the target UE, replying to the source UE with a paging response message, where the paging response message carries its own serving base station identifier;

The paging message is ignored when it is determined that the network element is not calling the target UE.

Optionally, the system further includes a neighboring base station;

The network element is configured to send a paging message to a neighboring base station and a paging target UE on a base station and a base station (X2 interface), where the neighboring base station includes all base stations having an X2 interface with the base station or The base station is in the same discovery area and has an X2 interface, the paging message includes an identifier of the target UE, and the identifier of the target UE includes any one or any of the following information:

S-TMSL IMSL GUTL discovery ID, and IP address;

Receiving a paging response message returned by the neighboring base station, where the paging response message carries a serving base station identifier of the target UE.

Optionally, the neighboring base station is configured to: after receiving the paging message, acquire a state in which the target UE is located, and perform a paging operation according to a state in which the target UE is located, where the target The state in which the UE is located includes a connected state and an idle state; or,

After receiving the paging message, the paging operation is directly performed.

Optionally, before the network element sends the paging message to the neighboring base station on the X2 interface, the network element obtains the state where the target UE is located by: performing the service from the network element by using an air interface message. The UE obtains, the air interface message includes an air interface message of the cellular communication, and the air interface message of the cellular communication includes: a random access message, a radio resource control (RRC) connection request message, an RRC connection setup complete message, and an RRC connection reestablishment request message. And an RRC connection reestablishment complete message, and an RRC connection reconfiguration complete message.

Optionally, the target UE is further configured to perform a random access procedure and/or back immediately after receiving the paging message sent by the neighboring base station, when the target UE is in the serving cell of the neighboring base station. Repeat paging response message; or,

When the target UE is in the serving cell of the neighboring base station, when a tracking area update (TAU) period arrives, a random access procedure and/or a reply response message is performed in the TAU procedure;

Optionally, the system further includes an MME;

The network element is further configured to send a paging message to the MME on the interface (S1 interface) between the base station and the packet core network, to page the target UE, where the paging message includes the identifier of the target UE, The identifier of the target UE includes an S-TMSI, an IMSL GUTL discovery ID, and an IP address.

The embodiment of the present invention further provides a system for acquiring user equipment serving base station information, including: a network element, a device to device D2D registration server (DRS), and a target user equipment (UE);

The network element is configured to obtain a serving base station identifier of the target UE by sending a query request message to the D2D registration server;

The network element is any of the following devices:

UE, base station, and mobility management entity (MME).

Optionally, the D2D registration server is configured to determine whether the serving base station information of the target UE is saved;

When the result of the determination is that the serving base station information of the target UE is saved, the D2D registration server sends an inquiry response message to the network element;

When the result of the determination is that the serving base station information of the target UE is not saved, the D2D registration server sends a query failure message to the network element, or does not perform an operation, or triggers a paging procedure.

An embodiment of the present invention provides a method and system for acquiring information about a serving base station of a user equipment, where a network element obtains a serving base station identifier of a target UE according to the indication information, or obtains a serving base station identifier of the target UE by sending a paging message by the network element. Or, the network element obtains the serving base station identifier of the target UE by sending the query request message to the D2D registration server, so that the serving base station identifier of the target UE is directly and efficiently obtained by the network element, and the signaling path is solved by the method for acquiring the location of the UE. Longer, The network overhead is too large, the load is heavy, and the delay is large. BRIEF abstract

The drawings are intended to provide an understanding of the embodiments of the present invention, and are intended to be a part of the present invention, and the description of the present invention is not intended to limit the invention. In the drawing:

FIG. 1 is a D2D scene diagram of two UEs being in the same base station;

2 is a D2D scenario diagram in which two UEs are in different base stations;

3 is a system architecture diagram applicable to an embodiment of the present invention;

FIG. 4 is a schematic flowchart of a method for acquiring information about a serving base station of a user equipment according to Embodiment 1 of the present invention;

FIG. 5 is a schematic flowchart of a method for acquiring user equipment serving base station information according to Embodiment 2 of the present invention;

FIG. 6 is a schematic flowchart of a method for acquiring user equipment serving base station information according to Embodiment 3 of the present invention;

FIG. 7 is a schematic flowchart of a method for acquiring information about a serving base station of a user equipment according to Embodiment 4 of the present invention;

FIG. 8 is a schematic flowchart of a method for acquiring user equipment serving base station information according to Embodiment 5 of the present invention;

FIG. 9 is a schematic flowchart of a method for acquiring user equipment serving base station information according to Embodiment 6 of the present invention;

FIG. 10 is a schematic flowchart of a method for acquiring user equipment serving base station information according to Embodiment 7 of the present invention;

FIG. 11 is a schematic flowchart of a method for acquiring user equipment serving base station information according to Embodiment 8 of the present invention;

FIG. 12 is a schematic flowchart diagram of a method for acquiring user equipment serving base station information according to Embodiment 9 of the present invention; FIG. 13 is a schematic flowchart of a method for acquiring user equipment serving base station information according to Embodiment 10 of the present invention;

FIG. 14 is a schematic flowchart of a method for acquiring information about a serving base station of a user equipment according to Embodiment 11 of the present invention;

15 is a schematic flowchart of a method for acquiring information about a base station of a user equipment service provided by Embodiment 12 of the present invention;

16 is a schematic flowchart of a method for acquiring user equipment serving base station information according to Embodiment 13 of the present invention;

FIG. 17 is a schematic flowchart of a method for acquiring user equipment serving base station information according to Embodiment 14 of the present invention;

FIG. 18 is a schematic flowchart of a method for acquiring user equipment serving base station information according to Embodiment 15 of the present invention;

FIG. 19 is a schematic flowchart of a method for acquiring user equipment serving base station information according to Embodiment 16 of the present invention;

20 is a schematic flowchart of a method for acquiring user equipment serving base station information according to Embodiment 17 of the present invention;

FIG. 21 is a schematic flowchart of a method for acquiring information about a user equipment serving base station according to Embodiment 18 of the present invention;

FIG. 22 is a schematic flowchart of a method for acquiring user equipment serving base station information according to Embodiment 19 of the present invention;

FIG. 23 is a schematic flowchart of a method for acquiring user equipment serving base station information according to Embodiment 20 of the present invention;

FIG. 24 is a schematic flowchart diagram of a method for acquiring user equipment serving base station information according to Embodiment 21 of the present invention. Preferred embodiment of the invention

In the scenario where two UEs of the two communicating parties belong to different base stations, the serving base station of UE1 is rotating. When signaling a message, the assistance of the serving base station corresponding to UE2 is required. In the related standard, only the MME can know the location of the UE, that is, the base station serving cell corresponding to the connected state UE or the tracking area corresponding to the idle state UE. If the UE is in the idle state, the MME needs to page the UE within the tracking area corresponding to the UE to find the location of the UE, and obtain the serving base station identifier where the UE is located. This method requires sending a lot of signaling messages, resulting in a long signaling path, excessive network overhead, heavy load, and large delay, which cannot reflect the advantages of D2D.

In order to make D2D discovery and communication easier and faster, it is necessary to provide a more efficient method of acquiring UE service base station information.

Embodiments of the present invention provide a method and system for acquiring user equipment serving base station information, and embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of non-conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other.

The technical solution provided by the embodiment of the present invention is applicable to a hybrid communication system composed of cellular communication and D2D communication. As shown in FIG. 3, the communication system includes a base station, a user equipment (UE), and a mobility management entity (MME). The user equipment can be a cellular telephone, a cordless telephone, a conference initiation protocol (SIP) telephone, a wireless local loop station (WLL), a personal digital assistant (PDA), a handheld device with wireless connectivity, a computing device, or a connection to Other processing devices for wireless modems. The base station can be used to communicate with wireless terminals, and can also be referred to as an access point, Node B, or other terminology. Cellular communication can be performed between the base station and the wireless terminal, and the cellular communication can include GSM, CDMA, WCDMA, TD-SCDMA, UMTS, LTE, and other communications using cellular network technology. The user equipment has device-to-device (D2D) discovery and/or communication functions, and D2D discovery and/or communication can be performed between user equipments that have D2D discovery and/or communication functions enabled. The user equipment can discover other neighboring user equipments by sending discovery signals (beacon signals) or receiving discovery signals (beacon signals) of other neighboring user equipments, or can be discovered by other neighboring user equipments. In actual deployment, there may be multiple user equipments, and two user equipments performing D2D communication may be served by the same base station or by different base stations.

Optionally, in the system, a D2D registration server may also be deployed to specifically manage the user equipment of the D2D communication. The D2D registration server can be deployed on the access network, for example, on the same network element as the base station, or as a separate access network element; the D2D registration server can also be deployed on the core network, for example, with the MME. On the same network element, or as a separate core Heart network element. The D2D registration server can be used to manage D2D discovery and communication, and can store information about the UE.

In the embodiment of the present invention, UE1 refers to the source UE, UE2 refers to the target UE, eNB1 is the serving base station of UE1, eNB2 is the serving base station of UE2, MME is the mobility management entity, and DRS is the D2D registration server.

The first embodiment to the fifth embodiment of the present invention mainly describe a scheme for the network element to obtain the identifier of the target base station of the target UE according to the indication information. The first embodiment to the fifth embodiment are respectively described in detail below.

Embodiment 1

In the embodiment of the present invention, the UE1 (source UE) is used as the network element, and the beacon signal carries the indication information as an example for description. The method for initiating the discovery of the beacon signal in the beacon signal scenario of the UE is described. As shown in FIG. 4, the steps are as follows:

Step S401: UE2 sends a beacon signal.

The beacon signal can be sent in the form of broadcast, unicast, or multicast. The beacon signal may be sent periodically, or may be sent in a specific discovery time slot, or may be sent when the target UE needs to discover other UEs or be discovered by other UEs.

Step S402: The UE1 listens to the beacon signal sent by the UE2, and obtains the indication information in the beacon signal.

The UE1 obtains the indication information in the beacon signal, and may be direct indication information, such as information indicating the serving base station, a discovery area identifier (discovery area ID), a discovery identifier (discovery ID), and the like. The indication information related to the base station may be a base station identifier (eNB ID), a global cell unique identifier (ECGI), a physical cell identifier (PCI), an IP address, and other information that can directly or indirectly identify the base station; or may be indirect Indicates information, such as resources for sending beacon signals, and so on.

Embodiment 2 In the embodiment of the present invention, the UE1 (source UE) is used as the network element, and the beacon response information carries the indication information as an example for description. A method for initiating discovery of a beacon response message in a scenario in which a UE sends a beacon signal is described. As shown in FIG. 5, the steps are as follows:

Step S501: UE1 sends a beacon signal.

Step S502: UE2 monitors the beacon signal sent by UE1.

Step S503: UE2 sends a beacon response message to UE1.

The beacon response message sent by the UE2 may carry the information about the serving base station of the UE2, including the eNB ID, ECGI, PCI, or other information that can identify the base station; or may carry the information such as the discovery ID and the discovery area ID; or carry other valid Information, etc.

Step S504: The UE1 receives the beacon response message of the UE2, and obtains the indication information in the beacon response message.

The UE1 obtains the indication information in the beacon response message, and may be direct indication information, for example, information indicating the serving base station, a discovery area identifier (discovery area ID), a discovery identifier (discovery ID), and the like. The indication information related to the base station may be a base station identifier (eNB ID), a global cell unique identifier (ECGI), a physical cell identifier (PCI), an IP address, and other information that can directly or indirectly identify the base station; the UE1 acquires The indication information in the beacon response message may also be an indirect indication information, such as a resource for sending a beacon corresponding message.

Embodiment 3

In the embodiment of the present invention, the UE1 (source UE) is used as the network element, and the beacon response message carries the indication information as an example. A method for initiating discovery of a beacon signal and a beacon response message in a beacon signal scenario is described. As shown in FIG. 6, the steps are as follows: Step S601: UE1 sends a beacon signal.

The beacon signal can be sent in the form of broadcast, unicast, or multicast. The beacon signal may be sent periodically or in a specific discovery time slot, or Sent when the target UE needs to discover other UEs or is discovered by other UEs.

Step S602: The UE2 listens to the beacon signal sent by the UE1, and acquires the serving base station information of the UE1.

The UE2 can obtain the information carried in the beacon signal sent by the UE1, and obtain the information of the serving base station of the UE1 according to the information carried in the beacon signal, and can be based on the indication information in the beacon signal, for example, the base station identifier (eNB ID), the global cell unique The identification (ECGI), the physical cell identifier (PCI), the IP address, and other information that can directly or indirectly identify the base station directly obtain the service base station identifier of the UE1; or according to other indication information carried in the beacon signal, for example, the discovery area identifier (discovery) The area ID), the discovery identifier (discovery ID), etc., derive the serving base station identifier of the UE1; or obtain the serving base station identifier of the UE1 according to the resource that the UE1 sends the beacon signal.

Step S603: UE2 sends a beacon response message to eNB2.

The UE2 may carry the service base station identifier of the UE1 in the response message sent to the eNB2, and may only carry the information carried in the beacon signal acquired by the UE2. After receiving the information, the eNB2 derives the serving base station of the UE1 according to the information. Logo.

Step S604: The eNB2 forwards the beacon response message to the serving base station eNB1 of the UE1.

The eNB2 may directly obtain the information of the eNB1 from the UE2, and may also derive the information of the eNB1 according to the information reported by the UE2.

Step S605: The eNB1 receives the beacon response message forwarded by the eNB2, and saves the mapping relationship between the UE2 and the eNB2.

The eNB1 saves the mapping relationship between the UE2 and the eNB2, and means that the eNB1 stores the serving base station of the UE2 as the eNB2, and may be saved as the context of the UE2, or may be saved as the context of the UE1, or may be saved as other information. Step S606: The eNB 1 forwards the beacon response message to the UE1.

The beacon response message forwarded by the eNB1 to the UE1 may carry the information of the eNB2, or may not be carried.

Step S607: The UE1 receives the beacon response message forwarded by the eNB1, and obtains the indication information in the beacon response message. If the beacon response message forwarded by the eNB1 carries the information of the eNB2, the UE1 needs to obtain the information; otherwise, it is not required.

Example four

In the embodiment of the present invention, the UE1 (source UE) is used as the network element, and the beacon signal or the beacon response message carrying indication information is taken as an example for description. A method for obtaining a serving base station identifier of a target UE according to a beacon signal or a beacon response message is provided, as shown in FIG.

Step S701: The UE1 receives the beacon signal or the beacon response message sent by the UE2. The beacon signal sent by the UE2 is used to discover other UEs or discovery signals found by other UEs. The beacon signal can be sent in the form of broadcast, unicast, or multicast. The beacon signal may be sent periodically, or may be sent in a specific discovery time slot, or may be sent when UE2 needs to discover other UEs or be discovered by other UEs.

The beacon response message sent by the UE2 is a reply confirmation message sent by the UE2 after receiving the beacon signal sent by the UE1.

Step S702: The UE1 acquires the indication information carried in the beacon signal or the beacon response message.

The indication information carried in the beacon signal or the beacon response message includes a base station identifier (eNB ID), a global cell unique identifier (ECGI), a physical cell identifier (PCI), an IP address, and other information capable of directly or indirectly identifying the base station.

Step S703: The UE1 obtains the serving base station identifier of the UE2 according to the beacon signal or the indication information carried in the beacon response message.

The UE1 obtains the serving base station identifier of the UE2 according to the beacon signal or the indication information carried in the beacon response message, and further includes: the UE1 directly obtains the serving base station identifier of the UE2 according to the beacon signal or the indication information carried in the beacon response message, or the UE1 according to the beacon The signal or the indication information carried in the beacon response message indirectly acquires the serving base station identifier of the UE2.

The UE1 directly obtains the serving base station identifier of the UE2 according to the beacon signal or the indication information carried in the beacon response message, and further includes: UE1 can directly know the serving base station identity of UE2 according to the eNB ID and the ECGL PCL IP address.

Step S704: The UE1 reports the serving base station information of the UE2 to the serving base station of the UE1.

UE1 can report the serving base station of UE2 to the serving base station of UE1 through the message on the air interface. The message on the air interface may be an air interface message of the related cellular communication or a newly added air interface message.

The air interface message of the related cellular communication includes: a random access message, an RRC connection request message, an RRC connection setup complete message, an RRC connection reestablishment request message, an RRC connection reestablishment complete message, an RRC connection reconfiguration complete message, a measurement report message, And other air interface messages for cellular communications.

The newly added air interface message includes: a D2D connection establishment request message, a D2D page request message,

D2D mode switch request message, and other new messages for D2D communication or cellular communication.

Step S705: The serving base station of UE1 saves the serving base station information of UE2 and the mapping relationship between UE2 and the serving base station of UE2.

The serving base station of the UE1 stores the serving base station information of the UE2 and the mapping relationship between the UE2 and the serving base station of the UE2 may be saved as the context of the UE1, may also be saved as the context of the UE2, may be saved as separate information, or may be saved as other information. .

Embodiment 5

In the embodiment of the present invention, the UE1 (source UE) is used as the network element, and the beacon signal or the beacon response message carrying indication information is taken as an example for description. Another method for obtaining the serving base station identifier of the target UE according to the beacon signal or the beacon response message is described. As shown in FIG. 8, the steps are as follows:

Step S801, step S802, and step S805 are the same as step S401, step S402, and step S405 in the first embodiment of the present invention, and details are not described herein again.

Step S803: The UE1 reports the indication information carried in the beacon signal or the beacon response message to the serving base station of the UE1.

UE1 can carry the beacon signal or the beacon response message through the message on the air interface. The indication information is reported to the serving base station of UE1. The message on the air interface may be an air interface message of the related cellular communication, or a newly added air interface message.

The newly added air interface message includes: a D2D connection establishment request message, a D2D page request message, a D2D mode switching request message, and other newly added messages for D2D communication or cellular communication.

Step S804: The serving base station of the UE1 obtains the serving base station identifier of the UE2 according to the beacon signal or the indication information carried in the beacon response message.

The serving base station of the UE1 obtains the serving base station identifier of the UE2 according to the beacon signal or the indication information carried in the beacon response message, and further includes: the serving base station of the UE1 directly acquires the serving base station of the UE2 according to the beacon signal or the indication information carried in the beacon response message. The identifier, or the serving base station of the UE1, indirectly obtains the serving base station identifier of the UE2 according to the beacon signal or the indication information carried in the beacon response message.

The serving base station of the UE1 directly obtains the serving base station identifier of the UE2 according to the beacon signal or the indication information carried in the beacon response message, and further includes:

The serving base station of UE1 can directly know the serving base station identity of UE2 according to the eNB ID and the ECGL PCL IP address.

Embodiment 6

In the embodiment of the present invention, the UE1 (source UE) is used as the network element, and the beacon signal carries the indication information as an example for description. A method for obtaining a serving base station identifier of a target UE according to a resource that a target UE sends a beacon signal or a beacon response message is described. As shown in FIG. 9, the steps are as follows:

Step S901, step S903, and step S904 are the same as steps S401, S404, and S405 in the first embodiment of the present invention, and details are not described herein again.

Step S902: UE1 sends a beacon signal or a resource of a beacon response message according to UE2. Obtain the serving base station identifier of UE2.

The resource or beacon response message of the beacon signal includes a time domain, a frequency domain, a code domain, and the like involved in the discovery signal.

The UE1 acquires the serving base station identifier of the UE2 according to the resource that the UE2 sends the beacon signal or the beacon response message, and further includes:

The UE1 obtains the serving base station identifier of the UE2 according to the mapping relationship between the resource of the beacon signal or the beacon response message sent by the UE2 and the base station.

The mapping between the resource of the beacon signal or the beacon response message and the base station may be negotiated by the neighboring base station, and each base station allocates a resource set, and the UEs served by different base stations use different resources to send the beacon signal or the beacon response message. The UE that is served by each base station sends a beacon signal or a resource of a b eacon response message to have a corresponding relationship with the base station; or any other resource that can be used by the UE to send a beacon signal or a beacon response message to determine any mapping relationship of the base station identifier.

The UE1 obtains the serving base station identifier of the UE2 according to the mapping relationship between the resource that the UE2 sends the beacon signal or the beacon response message and the base station, and further includes:

The UE1 stores the mapping relationship between the resource that the UE sends the beacon signal or the beacon response message and the base station, or the UE1 obtains the mapping relationship between the resource that the UE sends the beacon signal and the base station from other network elements.

The UE1 obtains the mapping relationship between the resources of the UE transmitting the beacon signal or the beacon response message and the base station from other network elements, and may be a network element that allocates resources from the base station, the MME, the D2D registration server, the network management system, or other beacon signals.

The resource for sending the beacon signal or the beacon response message may be a base station, an MME, a D2D registration server, a network management system, or other network element allocation.

Example 7

In the embodiment of the present invention, the UE1 (source UE) is used as the network element, and the beacon signal carries the indication information as an example for description. Another method for obtaining the serving base station identifier of the target UE according to the resource location of the target UE transmitting the beacon signal or the beacon response message is described. As shown in FIG. 10, the steps are as follows: Step S1001 and step S1004 are the same as steps S401 and S405 in the first embodiment of the present invention, and details are not described herein again.

Step S1002: The UE1 reports the resources of the beacon signal or the beacon response message sent by the UE2 to the serving base station of the UE1.

The UE1 can report the resources of the beacon signal or the beacon response message sent by the UE2 to the serving base station of the UE1 through the message on the air interface. The message on the air interface may be an air interface message of the related cellular communication, or a newly added air interface message.

Step S1003: The serving base station of the UE1 acquires the serving base station identifier of the UE2 according to the resource that the UE2 sends the beacon signal or the beacon response message.

The serving base station of the UE1 obtains the serving base station identifier of the UE2 according to the resource that the UE2 sends the beacon signal or the beacon response message, and further includes:

The serving base station of the UE1 acquires the serving base station identifier of the UE2 according to the mapping relationship between the resource of the beacon signal or the beacon response message transmitted by the UE2 and the base station.

The mapping between the resource of the beacon signal or the beacon response message and the base station of the UE2 may be negotiated by the neighboring base station, and each base station allocates a resource set, and the UEs under different base stations use different resources to send the beacon signal or the beacon response message. The resource of the beacon signal or the beacon response message sent by the UE under each base station has a corresponding relationship with the base station; or any other resource that can be used by the UE to send a beacon signal or a beacon response message to determine any mapping relationship of the base station identifier.

The serving base station of the UE1 obtains the serving base station identifier of the UE2 according to the mapping relationship between the resource that the UE2 sends the beacon signal or the beacon response message and the base station, and further includes: The mapping between the resource of the UE transmitting the beacon signal or the beacon response message and the base station is saved on the serving base station of the UE1, or the serving base station of the UE1 obtains the mapping relationship between the resource of the UE transmitting the beacon signal or the beacon response message and the base station from other network elements.

The serving base station of UE1 obtains the mapping relationship between the resources of the UE transmitting the beacon signal or the beacon response message and the base station from other network elements, and may respond to other base stations, MMEs, D2D registration servers, network management systems, or other beacon signals or beacons. The network element of the message allocation resource.

Example eight

The embodiment of the present invention describes a method for obtaining a service base station identifier of a target UE according to a discovery area ID of a target UE. As shown in FIG. 11, the steps are as follows:

Step S1101: The network element acquires a discovery area identifier (discovery area ID) of the target UE.

The network element includes: a UE, a base station, an MME, a D2D registration server, a network management system, or other network elements.

The discovery area refers to an area allocated for D2D discovery, and the discovery identifier (discovery ID) of the UE is valid. Similar to the tracking area, it can be the tracking area or not.

The discovery area ID may be carried in a beacon signal or a beacon response message, or may be carried in a D2D connection establishment request message, a D2D paging request message, a D2D mode switching request message, and other messages.

The UE obtains the discovery area ID of the target UE, and may obtain the discovery area ID of the target UE from the beacon signal sent by the target UE, or acquire the discovery area ID of the target UE from the beacon signal response message sent by the target UE.

The base station acquires the discovery area ID of the target UE, and may obtain the discovery area ID of the target UE from the UE, the MME, and the D2D registration server. The base station acquires the discovery area ID of the target UE from the UE, and the UE sends the discovery area ID of the target UE to the base station in the air interface message through the air interface message. The message on the air interface may be an air interface message of the related cellular communication, or a newly added air interface message.

Step S1102: The network element acquires the service base station identifier of the target UE according to the discovery area ID of the target UE.

The acquiring, by the network element, the serving base station identifier of the target UE according to the discovery area identifier (the discovery area ID) of the target UE, further includes:

The network element obtains the mapping relationship between the discovery area ID and the base station identifier from the locally saved information, or obtains the mapping relationship between the discovery area ID and the base station identifier from other network elements.

The network element obtains the service base station identifier of the target UE according to the mapping relationship between the discovery area ID and the base station identifier.

The mapping between the discovery area ID and the base station to obtain the serving base station identifier of the target UE, and the method further includes:

If the mapping between the area ID and the identifier of the base station is found, one discovery area ID corresponds to one base station, or one discovery area ID corresponds to one or more serving cells under one base station, or other mapping relationship of the base station identifier can be directly determined according to the discovery area ID. The network element may directly derive the serving base station identifier of the target UE according to the discovery area ID.

If the mapping relationship between the area ID and the base station identifier is that the discovery area ID corresponds to multiple base stations, or the serving cell under multiple base stations, or other mapping relationship that cannot directly determine the identifier of the base station according to the discovery area ID, the network element may be The serving base station identifier of the target UE is derived according to the discovery area ID and other auxiliary information. The auxiliary information includes: a discovery ID, a uniquely assigned base station valid identifier in the discovery area, or other useful information.

The discovery area ID may be allocated by a base station, an MME, a D2D registration server, a network management system, or other network elements.

The discovery area ID is allocated by the base station, and the negotiation between the base stations can be performed to ensure that the discovery area IDs of the neighboring base stations do not conflict.

Example nine

The embodiment of the present invention describes a method for acquiring a service base station identifier of a target UE according to a discovery ID of a target UE. As shown in FIG. 12, the steps are as follows:

Step S1201: The network element acquires a discovery identifier (discovery ID) of the target UE.

The UE obtains the discovery ID of the target UE, and may obtain the discovery ID of the target UE from the beacon signal sent by the target UE, or obtain the discovery ID of the target UE from the beacon signal response message sent by the target UE.

The base station acquires the discovery ID of the target UE, and may obtain the discovery ID of the target UE from the UE, the MME, and the D2D registration server.

The base station obtains the discovery ID of the target UE from the UE, and the UE sends the discovery ID of the target UE to the base station in the air interface message through the air interface message. The message on the air interface may be an air interface message of the related cellular communication, or a newly added air interface message.

The newly added air interface message includes: a D2D connection establishment request message, a D2D page request message, D2D mode switch request message, and other new messages for D2D communication or cellular communication.

Step S1202: The network element acquires the serving base station identifier of the target UE according to the discovery ID of the target UE.

The acquiring, by the network element, the serving base station identifier of the target UE according to the discovery ID of the target UE, further includes:

The network element acquires the service base station identifier of the target UE according to the mapping relationship between the discovery ID of the target UE and the base station.

The mapping relationship between the discovery ID of the UE and the base station may be that the neighboring base station uses different discovery ID sets, and the base station identifier may be uniquely determined according to the discovery ID.

The discovery ID set of the UE may be negotiated by a neighboring base station, and each base station allocates one discovery ID set, and the UEs under different base stations use different discovery IDs; or the MME allocates different discovery ID sets to the base stations managed by the MME. Or the D2D registration server allocates a discovery ID set to the base station; or the other network element allocates a discovery ID set to the base station.

Embodiments 10 to 16 of the present invention mainly describe a method for a network element to acquire a target UE serving base station identifier by using a paging message. The following describes the embodiments in detail.

Example ten

In the embodiment of the present invention, the UE1 (source UE) is a network element, and the beacon signal carries a paging message as an example for description. A method for obtaining a serving base station of a target UE by carrying a paging message in a beacon signal is described. As shown in FIG. 13, the steps are as follows:

Step S1301: UE1 sends a beacon signal, and carries a paging message in the beacon signal. The sending manner of the beacon signal sent by the UE1 may be broadcast, unicast, or multicast. The beacon signal may be sent periodically, or may be sent in a specific discovery time slot, or may be sent when the target UE needs to discover other UEs or be discovered by other UEs.

The paging message carried by the UE1 in the beacon signal includes the identifier of the UE2. The identifier of the UE2 may be a discovery ID, an S-TMSL IMSL GUTL IP address, or other information that may identify the UE2. Step S1302: UE2 receives the beacon signal, and determines whether the paging message carried in the beacon signal is paging itself.

The UE2 determines whether it is paging itself according to the UE identifier carried in the paging message. If the UE identifier carried in the paging message matches its own UE identifier, it is determined that the paging message is paging itself. Otherwise, not to page yourself.

If the UE2 determines that the paging message is paging itself, step S03 and subsequent steps are performed; otherwise, the paging message is ignored.

Step S1303: UE2 performs corresponding operations according to the state in which it is located, and further includes: if UE2 is in an idle state, UE2 randomly accesses to eNB2, and then sends a beacon response message to UE1.

The UE2 randomly accesses the eNB2, and may perform a random access procedure immediately after receiving the paging message; or perform a random access procedure in the TAU process when the TAU period arrives.

If UE2 is in the connected state, UE2 directly sends a beacon response message to UE1.

Step S1304: UE2 randomly accesses to eNB2.

The UE2 randomly accesses the eNB2, and may use the random access procedure of the related cellular communication; or use the modified random access procedure; or the newly defined random access procedure.

Step S1305: UE2 sends a beacon response message to UE1.

The beacon response message carries the identifier of the UE2 and the information of the serving base station eNB2 of the UE2.

The beacon response message may be directly sent to UE1 through UE2 or forwarded through eNB2 and eNB1.

Embodiment 11

In the embodiment of the present invention, the UE1 (source UE) is a network element, and the beacon signal carries a paging message as an example for description. Another method for obtaining a serving base station of a target UE by carrying a paging message in a beacon signal is described. As shown in FIG. 14, the steps are as follows:

Step S1401: UE1 sends a beacon signal, and carries a paging message in the beacon signal. The manner in which the UE1 sends the beacon signal may be broadcast, unicast, or multicast. The paging message carried by the UE1 in the beacon signal includes the identifier of the UE2. The identifier of the UE2 may be a discovery ID, an S-TMSL IMSL IP address, or other information that may identify the UE 2.

Step S1402: The UE2 receives the beacon signal, and determines whether the paging message carried in the beacon signal is paging itself.

Step S1403: UE2 determines that it is in an idle state.

Step S1404: UE2 randomly accesses to eNB2.

The UE2 randomly accesses the eNB2, and can perform a random access procedure immediately; or when the TAU period arrives, the random access procedure is performed in the TAU process.

The UE2 may instruct the eNB2 to perform a paging response to the UE1 in the process of random access. The indication information may be a direct indication or an indirect indication.

If UE2 instructs eNB2 to perform a paging response to UE1 in the process of random access, step S1406 is performed; otherwise, step S1405 is performed.

Step S1405: UE2 sends a paging response message to eNB2.

Step S1406: The eNB2 sends a paging response message to the eNB1.

The message is indicated in the message as a paging response message from UE2 to UE1.

The eNB2 sends a paging message to the eNB1, which may be to forward the paging response message from the UE2, or to perform a paging response by using a message on the associated and/or newly added X2 interface.

The message on the related X2 interface includes: a base station configuration update message, a base station configuration update Confirmation message, base station configuration update failure message, handover request message, handover request acknowledgement message, handover preparation failure message, X2 setup request message, X2 setup request response message, reset message, load information, link failure indication message, SN status transmission Messages, UE context release messages, and other messages on the X2 interface.

The message on the related X2 interface may be that the paging response is directly performed by using the related X2 message, or the IE of the relevant X2 message is multiplexed to perform a paging response, or a new IE is added to the related air interface message to search. Call response. Step S1407: After receiving the paging response message, the eNB1 sends a paging response message to the UE1. The paging response message sent by the eNB1 to the UE1 may be a paging response message from the eNB2, or a paging response message generated by the eNB1 itself.

The paging response message sent by the eNB1 to the UE1 includes the identifier of the UE2 and/or the serving base station identifier of the UE2, and/or other necessary information.

The identity of the UE2 includes a discovery ID, an S-TMSL IMSL IP address, or other information that can identify the UE2.

The paging response message generated by the eNB1 may be a multiplex-related air interface message or a newly added air interface message.

The related air interface message includes: a paging message, a random access response message, an RRC connection message, an RRC connection reconfiguration message, an RRC connection reestablishment message, an RRC connection release message, a downlink information transmission message, a UE capability query message, and UE information. Request messages, TAU messages, and other air interface messages.

The multiplexing related air interface message may be that the paging response is directly performed by using the relevant air interface message, or the IE that multiplexes the relevant air interface message performs a paging response, or adds a new IE to the related air interface message to perform the paging response. .

Example twelve

In the embodiment of the present invention, the UE1 (source UE) is a network element, and the beacon signal carries a paging message as an example for description. Another method for obtaining a serving base station of a target UE by carrying a paging message in a beacon signal is described. As shown in FIG. 15, the steps are as follows: Step S1501: UE1 sends a beacon signal, and carries a paging message in the beacon signal. The manner in which the UE1 sends the beacon signal may be broadcast, unicast, or multicast. The paging message carried by the UE1 in the beacon signal includes the identifier of the UE2. The identifier of the UE2 may be a discovery ID, an S-TMSL IMSL IP address, or other information that may identify the UE 2.

Step S1502: UE2 receives the beacon signal, and determines whether the paging message carried in the beacon signal is paging itself.

Step S1503: UE2 determines that it is in the connected state.

Step S1504: UE2 sends a paging response message to eNB2.

The paging response message may be a multiplex-related air interface message or a newly added air interface message. The related air interface message includes: a random access message, an RRC connection request message, an RRC connection setup complete message, an RRC connection reestablishment request message, an RRC connection reestablishment complete message, an RRC connection reconfiguration complete message, a measurement upper message, a TAU message, and Other air interface messages.

Step S1505: After receiving the paging response message from the UE2, the eNB2 sends a paging response message to the eNB1.

The eNB2 sends a paging response message to the eNB1, which may be to forward the paging response message from the UE2, or use the related and/or newly added messages on the X2 interface to perform the paging response.

The message on the related X2 interface may be that the paging response is directly performed by using the related X2 message, or the IE of the relevant X2 message is multiplexed to perform a paging response, or a new IE is added to the related X2 message for searching. Call response. Step S1506: After receiving the paging response message, the eNB1 sends a paging response message to the UE1. The eNB1 sends a paging response message to the UE1, which may be a multiplex-related air interface message or a newly added air interface message.

Example thirteen

The embodiment of the present invention uses a base station as a network element as an example for description. A method for obtaining a serving base station of a target UE by transmitting a paging message by a base station is described. As shown in FIG. 16, the steps are as follows:

Step S1601: The base station wants to acquire the serving base station of the target UE.

The scenario that the base station needs to obtain the serving UE of the target UE is as follows: the base station receives the D2D connection setup request message of the source UE, or the base station receives the D2D paging request message of the source UE, or the base station is the source The UE forwards the message to the target UE.

Step S1602: The base station determines whether the target UE is in its own serving cell.

The determining, by the base station, whether the target UE is in its own serving cell, further includes: The method for the base station to determine whether the target UE is in its own serving cell according to the state of the target UE includes:

If the target UE is in an idle state, the base station sends a paging message in its own serving cell to locate the target UE;

If the target UE is in the connected state, the base station determines whether the target UE is served by the base station. The base station acquires the state of the target UE, which may be obtained by the base station from the source UE; or the base station acquires from the MME; or the base station acquires from the D2D registration server, or the base station acquires from the network management system, or the base station acquires from other network elements.

The base station acquires the state of the target UE from the source UE, and may be that the source UE sends the state of the target UE to the base station by using an air interface message.

The air interface message may be an air interface message of an associated cellular communication or a newly added air interface message. The air interface message of the related cellular communication includes: a random access message, an RRC connection request message, an RRC connection setup complete message, an RRC connection reestablishment request message, an RRC connection reestablishment complete message, an RRC connection reconfiguration complete message, a measurement report message, And other air interface messages for cellular communications.

The state in which the target UE is located may be carried in a discovery signal sent by the target UE.

Step S1603: If the target UE is in its own serving cell, the paging is ended.

If the base station receives the paging response of the target UE, that is, the target UE randomly accesses the base station, or the base station determines that the target UE is served by the base station, the target UE is in its own serving cell, and the base station ends the paging.

Step S1604: If the target UE is not in its own serving cell, the base station sends a paging message to the neighboring base station or the MME.

If the base station does not receive the paging response of the target UE, that is, the target UE does not randomly access the base station, or the base station determines that the target UE is not served by the base station, the target UE is not in its own serving cell, and the base station gives the neighboring base station or The MME sends a paging message. The paging message carries the identity of the target UE, the state of the target UE, and other necessary information.

Step S1605: The neighboring base station or the MME determines whether the target UE is in the connected state, and performs a corresponding operation.

The neighboring base station or the MME determines whether the target UE is in the connected state according to the information in the paging message sent by the base station.

Step S1606: The neighboring base station or the MME directly returns the serving base station information of the target UE. If the target UE is in the connected state, the neighboring base station determines whether the target UE has a connection with itself to decide whether it is necessary to reply the message to the base station. If the target UE is connected to the neighboring base station, the neighboring base station directly returns the serving base station information of the target UE to the base station. Otherwise, no reply is required.

If the target UE is in the connected state, the MME determines whether the information of the target UE is saved, and if so, directly returns the serving base station information of the target UE to the base station. Otherwise, no reply is required.

Step S1607: The neighboring base station or the MME determines the paging area and sends a paging message.

The determining of the paging area includes: a neighboring cell of the base station, and a cell included in the discovery area.

Embodiment 14

The embodiment of the present invention uses a base station as a network element as an example for description. Another method for obtaining a serving base station of a target UE by transmitting a paging message through a base station is described. As shown in FIG. 17, the steps are as follows:

Step S1701: The base station determines whether the target UE is in its own serving cell.

Step S1702: The base station determines whether the target UE is in a connected state.

Step S1703: The base station determines whether the target UE is served by the base station.

If the target UE is in the connected state, the base station can directly determine whether the target UE is in its own service area according to whether the target UE has a connection with itself.

Step S1704: The base station sends a paging message in all of its own serving cells to page the target UE. If the target UE is in an idle state, the base station transmits a paging message in all of its own serving cells to page the target UE. If the target UE performs a paging response, that is, the target UE randomly accesses the base station, the target UE is in the serving cell of the base station. Otherwise, no. After receiving the paging message, the target UE may immediately perform a random access procedure and/or a reply paging response message; or, when the TAU period arrives, perform a random access procedure and/or a reply response message in the TAU procedure. The paging response message may be a random access message, a TAU message, or other related or newly added air interface message.

Example fifteen

The embodiment of the present invention uses a base station as a network element as an example for description. Another method for obtaining a serving base station of a target UE by transmitting a paging message through a base station is described. As shown in FIG. 18, the steps are as follows:

Step S 1801: UE1 sends a D2D connection setup request message to the eNB 1.

The D2D connection establishment request message includes the identifier of the target UE2.

The identifier of the UE2 includes a discovery ID, an S-TMSL IMSL GUTL IP address, or other information that can identify the UE2.

Step S1802: The eNB1 determines whether the UE2 is in its own serving cell, and performs a corresponding operation. The eNB1 determines whether the UE2 is in its own serving cell according to the method described in Embodiment 10. If UE2 is served by the cell of eNB1, the paging is stopped; otherwise, eNB1 sends a paging message to the neighboring base station through the X2 interface.

Step S1803: The eNB 1 sends a D2D paging request message to the eNB2.

The D2D paging request message includes identifiers of the source UE1 and the target UE2.

The identification includes a discovery ID, an S-TMSL IMSL GUTL IP address, or other information that can identify the UE.

The eNB2 sends a D2D Paging Request message to the eNB 1 to utilize the associated and/or newly added messages on the X2 interface.

The message on the related X2 interface includes: a base station configuration update message, a base station configuration update acknowledgement message, a base station configuration update failure message, a handover request message, a handover request acknowledgement message, a handover preparation failure message, an X2 setup request message, and an X2 setup request. Response message, reset message, load information, link failure indication message, SN status transmission message, UE context release message, and other messages on the X2 interface. The message on the related X2 interface may be directly paged with the relevant X2 message, or IE multiplexed with the relevant X2 message, or a new IE may be added to the related X2 message for paging.

Step S 1804: The eNB2 acquires the state of the UE2, and performs a corresponding operation according to the state of the UE2.

If UE2 is in the connected state, eNB2 determines whether UE2 is served by eNB2. If UE2 is served by eNB2, step S1807 is directly performed; otherwise, no operation is performed.

If UE2 is in the idle state, step S1805 is performed.

The method for the eNB2 to acquire the state in which the UE2 is located includes: the eNB2 itself saves the state in which the UE2 is located; or the eNB1 sends the state in which the UE2 is located to the eNB2 in the D2D paging request message; or the eNB1 passes the correlation and/or new The message on the X2 interface will send the status of UE2 to eNB2.

The message on the X2 interface includes: a base station configuration update message, a base station configuration update acknowledgement message, a handover request message, a handover confirmation message, and other messages on the X2 interface.

The method for the eNB1 to acquire the state in which the UE2 is located includes: UE1 sends the state in which the UE2 is located to the eNB1 through an air interface message.

The state in which the UE2 is located may be carried in the beacon signal sent by the UE2 and sent to the UE1. Step S1805: The eNB2 sends a D2D paging request message to the UE2 in its own serving cell. The eNB2 sends a D2D paging request message to the UE2 in its own serving cell, and can use the related mechanism and paging message, or modify the related paging mechanism and paging message, or Newly defined paging mechanism and paging messages.

Step S1806: UE2 sends a D2D paging response message to eNB2.

If UE2 is in the serving cell of eNB2, UE2 performs a paging response, randomly accesses to eNB2, and sends a paging response message to eNB2.

After receiving the paging message, the target UE may immediately perform a random access procedure and/or a reply paging response message; or, when the TAU period arrives, perform a random access procedure and/or a reply paging response in the TAU procedure. Message. The paging response message may be a random access message, a TAU message or other related or newly added air interface message.

The paging response message sent by the UE2 to the eNB2 includes the UE1 identifier, the identifier of the UE2, and/or the serving base station identifier of the UE2, and/or other necessary information.

The identification includes a discovery ID, an S-TMSL IMSL IP address, or other information that can identify the UE.

Step S1807: The eNB2 sends a D2D paging response message to the eNB1.

The message on the related X2 interface includes: a base station configuration update message, a base station configuration update acknowledgement message, a base station configuration update failure message, a handover request message, a handover request acknowledgement message, a handover preparation failure message, an X2 setup request message, and an X2 setup request. Response message, reset message, load information, link failure indication message, SN status transmission message, UE context release message, and other messages on the X2 interface.

The message on the related X2 interface may be directly searched by the related X2 message. The response is responsive, or the IE that multiplexes the relevant X2 message performs a paging response, or a new IE is added to the associated X2 message to perform a paging response.

Example sixteen

The embodiment of the present invention uses a base station as a network element as an example for description. Another method for obtaining a serving base station of a target UE by transmitting a paging message through a base station is described. As shown in FIG. 19, the steps are as follows:

Step S1901: UE2 is in an idle state.

Step S1902: UE2 sends a beacon signal.

The sending of the beacon signal carries the identity of the UE2.

The beacon signal may also carry a state in which the UE2 is located, including a connected state and an idle state. The beacon signal may be sent in a unicast, broadcast, or multicast manner.

Step S1903: UE1 monitors the beacon signal of UE2.

Step S1904: UE1 sends a beacon response message to its own serving base station eNB1.

Steps S1905 to S1910 are the same as steps S1802 to S1807 in the fifteenth embodiment, and are not described herein again.

Step S 1911: The eNB 1 forwards the beacon response message to the eNB2.

Step S1912: The eNB2 forwards the beacon response message to the UE2.

Example seventeen

The embodiment of the present invention uses a base station as a network element as an example for description. Another method for obtaining a serving base station of a target UE by transmitting a paging message through a base station is described. As shown in FIG. 20, the steps are as follows:

Step S2001: UE1 sends a D2D connection setup request message to the eNB 1.

The identifier of the UE2 includes a discovery ID, an S-TMSL IMSL IP address, or other labelable Know the information of UE2.

Step S2002: The eNB1 determines whether the UE2 is in its own serving cell, and performs a corresponding operation. The eNB1 determines whether the UE2 is in its own serving cell according to the method described in Embodiment 10. If UE2 is in its own serving cell, it stops paging; otherwise, it sends a paging message to the MME through the S1 interface.

Step S2003: The eNB 1 sends a D2D paging request message to the MME.

The D2D paging request message includes an identifier of the target UE2.

Step S2004: The MME determines the connection state where the UE2 is located, and performs a corresponding operation.

If the UE2 is in the connected state, the MME determines whether the UE2 is in its own service area. If yes, the MME directly performs step S2009 to return the serving base station information of the UE2 to the base station. Otherwise no action is taken.

If UE2 is in the idle state, the MME determines the paging area and sends a paging message in the paging area.

The determining of the paging area includes: a neighboring cell of the base station, and a cell included in the discovery area. Step S2005: The MME sends a D2D paging request message in the paging area.

The D2D paging request message includes the identifier of the UE2.

The D2D paging request message may be related to a paging message, or a modification to a related paging message, or a newly defined message.

Step S2006: The base station in the paging area sends a D2D paging request message in its own serving cell to page the UE.

The base station of the paging area may be to forward a D2D paging request message from the MME, or may generate a paging message paging UE2 by itself.

Step S2007: After receiving the D2D paging request message, UE2 replies to the D2D paging response message.

After receiving the D2D paging request message, UE2 randomly accesses to eNB2 and sends a paging ring. The message should be given to eNB2.

After receiving the paging message, the target UE2 may immediately perform a random access procedure and/or a reply paging response message; or, when the TAU period arrives, perform a random access procedure and/or a reply paging response in the TAU procedure. Message. The paging response message may be a random access message, a TAU message or other related or newly added air interface message.

The paging response message sent by the UE2 to the eNB2 includes the identifier of the UE1, the identifier of the UE2, and/or other necessary information.

The identifier of the UE includes a discovery ID, an S-TMSL IMSL IP address, or other identifiers that can be identified.

UE information.

Step S2008: The serving base station eNB2 of UE2 sends a D2D paging response message to the MME. The D2D paging response message sent by the eNB2 includes the identifier of the UE1 and the identifier of the UE2.

The identifier of the UE includes a discovery ID, an S-TMSI, an IMSI, an IP address, or other identifiers that can be identified.

UE information.

The D2D paging response message sent by the eNB2 may be a D2D paging response message sent from the UE2, or may be a paging response by using a related and/or newly added message on the S1 interface.

The message on the related S1 interface includes: a handover request message, a handover request acknowledgement message, a handover notification message, a path switch request message, a handover failure message, a handover cancellation message, a bearer setup response message, a bearer modification response message, and a bearer release response. Message, bearer release indication message, initial context setup response message, reset acknowledgement message, S1 setup request message, UE context repair Change request message, base station configuration update message, base station status transmission message, base station direct information transmission message, base station configuration transmission message, location report message, initial UE message, UE context release request message, UE context modification response message, and other S1 interfaces Message.

The message on the related S1 interface may be a paging response directly with the relevant air interface message, or an IE that multiplexes the related S1 interface message to perform a paging response, or add a new IE in the related S1 interface message. Make a page response.

Step S2009: The MME sends a D2D paging response message to the eNB1.

The D2D paging response message sent by the MME includes the identifier of the UE1, the identifier of the UE2, and the information of the serving base station eNB2 of the UE2.

UE information.

The D2D paging response message sent by the MME may be a D2D paging response message sent from the eNB2, or may be a paging response by using a related and/or newly added message on the S1 interface.

The message on the related S1 interface includes: a handover command message, a handover request message, a path conversion request acknowledgement message, a handover cancellation acknowledgement message, a bearer setup request message, a bearer modification request message, a bearer release command message, and an initial context setup request message. , a reset message, an S1 setup response message, a UE context tampering request message, a UE context release command, an MME configuration update message, a base station status transmission message, an MME status transmission message, an MME direct information transmission message, an MME configuration transmission message, and others Message on the S1 interface.

The message on the related S1 interface may be a paging response directly with the related S1 interface message, or an IE that multiplexes the related S1 interface message, or a new one is added to the related S1 interface message. The IE performs a paging response.

Example 18

The embodiment of the present invention uses a base station as a network element as an example for description. Another method for obtaining a serving base station of a target UE by transmitting a paging message through a base station is described. As shown in FIG. 21, the steps are as follows:

Step S2101: UE2 is in an idle state. Step S2102: UE2 sends a beacon signal.

The sending of the beacon signal carries the identity of the UE2.

Step S2103: UE1 monitors the beacon signal of UE2.

Step S2104: UE1 sends a beacon response message to its own serving base station eNB1.

Steps S2105 to S2112 are the same as steps S2002 to S2007 in the seventeenth embodiment, and are not described herein again.

Step S2113: The eNB1 forwards the beacon response message to the eNB2.

The eNB 1 forwards the beacon response message to the eNB2, which may be forwarded through the X2 interface, or may be forwarded by the MME through the S1 interface.

Step S2114: The eNB2 forwards the beacon response message to the UE2.

Embodiments 17 to 19 of the present invention describe a method for a network element to directly query a serving base station of a UE from a D2D registration server, and each embodiment will be described in detail below.

Example 19

The embodiment of the present invention uses a base station as a network element as an example for description. A method for a base station to directly query a serving base station of a target UE from a D2D registration server is described. As shown in FIG. 22, the steps are as follows:

Step S2201: The target UE is registered on the D2D registration server.

The D2D registration server may be deployed on the access network, or may be deployed on the core network, and may be in the same network element as the base station, or in the same network element as the MME, or as a separate network element.

The UE is registered on the D2D registration server, and may be at the time when the UE is powered on, the UE When the D2D function is enabled, or when the UE moves to the new D2D registration area, a D2D registration request message is sent to the D2D registration server.

The D2D registration request message may include: a discovery ID of the UE, another ID of the UE (S-TMSI or IMSI or GUTI or IP address, etc.), a serving base station identifier of the UE, a cell identifier where the UE is located, and other necessary information.

Step S2202: The D2D registration server saves the serving base station information of the target UE.

The D2D registration server saves the service base station information of the target UE, and may save the target.

The mapping relationship between the UE and the information of the serving base station may be saved as the context of the target UE or may be saved as other information. Step S2203: The base station queries the D2D registration server for the serving base station identifier of the target UE. The base station queries the serving base station identifier of the target UE from the D2D registration server, and may specifically send the serving base station to query the message, or carry the serving base station query information in other messages.

The serving base station query message sent by the base station carries the identifier of the target UE to be queried. The identity of the target UE may be a discovery ID, an S-TMSI, an IMSL GUTL IP address, or other information that may identify the target UE.

The serving base station query message sent by the base station may also carry the status of the target UE, and other necessary information. The states in which the target UE is located include: idle and connected states.

Example twenty

The embodiment of the present invention uses a base station as a network element as an example for description. A specific embodiment of the seventeenth embodiment is described, as shown in Figure 23, the steps are as follows:

Step S2301: The UE1 initiates a D2D connection setup request message to the UE2, and sends the message to the eNB1. The UE1 initiates a D2D connection setup request message to UE2 when UE1 wants to establish D2D communication with UE2.

The D2D connection establishment request message carries the identifier of the UE2.

The identifier of the UE2 may be a discovery ID, an S-TMSI, an IMSL GUTL IP address, or other information that can identify the UE 2. Step S2302: The eNB1 determines whether it has stored the serving base station information of the UE2.

The eNB1 checks whether it has the serving base station information of the UE2. If the service base station information of the UE2 is stored, the process proceeds to step S2306; otherwise, the process proceeds to step S2303.

Step S2303: The eNB1 sends a serving base station query message to the D2D registration server (DRS). If the eNB1 does not store the serving base station information of the UE2, the eNB1 sends a serving base station query message to the DRS, where the base station query message includes the identifier of the UE2.

The identity of the UE2 may be a discovery ID, an S-TMSL IMSL GUTL IP address, or other information that may identify the UE2.

The serving base station query message sent by the base station may also carry the state in which the UE2 is located, and other necessary information. The states in which the target UE is located include: idle and connected states.

The query request message has a UE for indicating the identity of the serving base station of the query target UE, and corresponding:

The related information may be multiplexed to query the serving base station identifier of the UE, or an IE is added to the related message to indicate the serving base station identifier of the UE, or a new message is defined, which is used to query the serving base station identifier of the UE; or Adding an IE to the newly added message for other purposes indicates that the serving base station identifier of the UE is queried.

The D2D registration server is used to manage the registration process of the D2D UE, and saves the serving base station information and other information of the D2D UE, which may be an independent network element, or in the same network as the base station or the MME or the network management system or other nodes. yuan.

Step S2304: The DRS determines whether it saves the serving base station information of UE2.

If the serving base station information of UE2 is saved, the DRS sends a serving base station query response message to the base station;

Otherwise, the DRS sends a serving base station query failure message to the base station; or initiates a paging procedure to locate the target UE; or triggers the MME and/or the base station to initiate a paging procedure to page the target UE; or does not perform any operation.

The DRS initiated paging procedure may be an associated paging procedure, or a modification to a related paging procedure, or a newly defined paging procedure. The MME and/or the base station initiates a paging procedure, and the paging target UE can use the method in the second embodiment.

Step S2305: The DRS replies to the eNB1 with a serving base station query response message.

The query response message includes an IE for indicating a serving base station identifier of the target UE, corresponding to:

The related message may be multiplexed to indicate the serving base station identifier of the target UE, or an IE may be added to the related message to indicate the serving base station identifier of the target UE; or a new message may be defined, specifically used to indicate the serving base station identifier of the target UE. Or add an IE to the newly added message for other purposes, indicating the serving base station identity of the target UE.

Step S2306: The eNB 1 forwards the D2D connection establishment request message to the eNB2.

After the eNB1 receives the serving base station information of the UE2 of the DRS reply as the eNB2, the eNB1 forwards the D2D connection establishment request message to the eNB2.

Step S2307: The eNB2 forwards the D2D connection establishment request message to the UE2.

Before the eNB2 forwards the D2D connection setup request message to the UE2, it is determined whether the UE2 is in the connected state. If the UE2 is in the connected state, the D2D connection establishment request message is directly forwarded to the UE2; if the UE2 is in the idle state, the eNB2 first pages the UE2, and after the UE2 randomly accesses the eNB2, the eNB2 forwards the D2D connection establishment request message to the UE2.

The paging procedure may be a related paging procedure, a modification of a related paging procedure, or a newly defined D2D paging procedure.

The eNB2 paging the target UE2, further includes:

The neighboring base station sends a paging message to the target UE. If the target UE is in the monthly service cell of the neighboring base station, the target UE may immediately perform a random access procedure and/or reply after receiving the paging message. Paging response message; or when the TAU period arrives, a random access procedure and/or a reply response message is performed in the TAU procedure. The paging response message may be a random access message, a TAU message, or other related or newly added air interface message.

Step S2308: Execute the remaining operation flow.

The remaining operation process includes: UE2 replies to the D2D connection establishment success message to the eNB2, and the eNB2 forwards the D2D connection establishment success message to the eNB1, and the eNB1 forwards the D2D connection establishment success. UE1, UE1 and UE2 perform D2D communication; or UE2 replies to the D2D connection establishment failure message to eNB2, eNB2 forwards the D2D connection establishment failure message to eNB1, eNB1 forwards the D2D connection establishment failure message to UE1; or some other possible operations.

Embodiment 21

The embodiment of the present invention uses a base station as a network element as an example for description. A specific embodiment of the seventeenth embodiment is described. As shown in Fig. 24, the steps are as follows:

Steps S2401 to S2404 are the same as steps S2301 to S2304 in the embodiment 20, and are not repeated here.

Step S2405: The DRS returns the serving base station query failure message to the eNB1. This step is optional. If the DRS does not save the serving base station information of UE2, no operation can be performed.

The query failure message may multiplex the related message to indicate that the serving base station identifier of the query target UE fails, or add an IE in the related message, indicating that the serving base station identifier of the query target UE fails; or define a new message, specifically The service base station identifier used to query the target UE fails; or an IE is added to the newly added other destination message, indicating that the serving base station identifier of the query target UE fails.

Step S2406: The eNB1 sends a D2D connection establishment failure message to the UE1.

The D2D connection establishment failure message includes the identifier of the UE2, indicating that the D2D connection establishment of the UE1 and the UE2 fails.

Example twenty two

An embodiment of the present invention provides a system for acquiring user equipment serving base station information, which may be combined with the method for acquiring user equipment serving base station information provided by Embodiments 1 to 9 of the present invention to obtain a target UE serving base station identifier. The system includes: a network element and a target UE;

The network element is configured to acquire, according to the indication information, a serving base station identifier of the target UE; The network element is any of the following devices:

UE, base station, MME, DRS, network management system.

Optionally, when the network element is a source UE, the network element is configured to receive a discovery signal or a discovery signal response message sent by the target UE, and parse the discovery signal from the discovery signal or the discovery signal response message. Or, the information carried in the signal response message is found, and the service base station identifier of the target UE is obtained according to the information.

Optionally, the network element is configured to acquire a serving base station identifier of the opposite UE according to the discovery area ID of the target UE;

The discovery area ID is carried in any of the following messages:

Discovery signal, discovery signal response message, D2D connection establishment request message, paging message. Optionally, the network element is configured to acquire a serving base station identifier of the target UE according to the discovery ID of the target UE;

The discovery ID is carried in any of the following messages:

Discovery signal, discovery signal response message, D2D connection establishment request message, paging message.

Example twenty-three

The embodiment of the present invention provides a system for acquiring user equipment serving base station information, which can be combined with the method for acquiring user equipment serving base station information provided by Embodiments 10 to 16 of the present invention to obtain a target UE serving base station identifier. . The system includes: a network element and a target UE;

The network element is configured to obtain a serving base station identifier of the target UE by sending a paging message; the network element is any one of the following devices:

UE, base station MME, DRS

Optionally, when the network element is a base station, the network element is configured to send a paging message to the peer network element in the discovery signal, where the paging message includes an identifier of the target UE, where the pair The end network element is any of the following devices:

Target UE, base station, MME, D2D registration service base station, network management system,

The identifier of the target UE includes an S-TMSI, an IMSL GUTL discovery ID, and an IP address. Receiving a paging response message sent by the peer network element, where the paging response message carries the serving base station identifier of the target UE.

When the network element is determined to call the target UE, the page response message is sent to the source UE, and the paging response message carries its own serving base station identifier;

Optionally, the system further includes a neighboring base station;

When the network element is a base station, the network element is configured to send a paging message to a neighboring base station, and a paging target UE, on the X2 interface, where the neighboring base station includes all base stations that have an X2 interface with the base station or The base station in the same discovery area as the base station and having an X2 interface, the paging message includes an identifier of the target UE, and the identifier of the target UE includes any one or any of the following information:

S-TMSL IMSL GUTL discovery ID, IP address,

Optionally, the neighboring base station is configured to acquire, after receiving the paging message, a state in which the target UE is located, and perform a paging operation according to a state in which the target UE is located, where the target UE is configured. The state at the location includes the connected state and the idle state; or,

After receiving the paging message, the paging operation is directly performed.

Optionally, the network element is further configured to obtain, by the base station, an air interface message from the UE that it serves, before sending the paging message to the neighboring base station on the X2 interface, where the air interface message includes an air interface of the cellular communication. The air interface message of the cellular communication includes: a random access message, an RRC connection request message, an RRC connection setup complete message, an RRC connection reestablishment request message, an RRC connection reestablishment complete message, and an RRC connection reconfiguration complete message.

Optionally, the target UE is configured to perform a random access procedure and/or a reply immediately after receiving the paging message sent by the neighboring base station, when the target UE is in the serving cell of the neighboring base station. Call response message; or,

When the target UE is in the serving cell of the neighboring base station, when the TAU period arrives, at the TAU Performing a random access procedure and/or a reply response message in the process;

Optionally, the system further includes an MME;

The network element is configured to send a paging message to the MME on the S1 interface, and to page the target UE, where the paging message includes an identifier of the target UE, where the identifier of the target UE includes S-TMSI, IMSL GUTL discovers the ID and IP address.

Example twenty four

The embodiment of the present invention provides a system for acquiring user equipment serving base station information, which can be combined with the method for acquiring user equipment serving base station information provided by Embodiment 17 to Embodiment 19 of the present invention to acquire a target UE serving base station. Logo. The system includes a network element, a D2D registration server, and a target UE;

The network element is configured to obtain a serving base station identifier of the target UE by sending a query request message to the D2D registration server.

The network element is any of the following devices:

UE, base station, MMEo

Optionally, the D2D registration server is configured to determine whether the service base station information of the target UE is saved;

When the result of the determination is that the serving base station information of the target UE is saved, the D2D registration server sends a query response message to the network element;

An embodiment of the present invention provides a method and system for acquiring user equipment serving base station information, where a network element acquires a serving base station identifier of a target UE according to the indication information, or the network element obtains a serving base station of the target UE by sending a paging message. Identifying, or sending, by the network element, a query request message to the D2D registration server to obtain the service base station identifier of the target UE, thereby achieving efficient and direct acquisition by the network element. The serving base station identifier of the UE solves the problem that the related method for acquiring the location of the UE causes a long signaling path, a large network overhead, a heavy load, and a large delay.

It will be understood by those of ordinary skill in the art that all or part of the steps of the above embodiments may be implemented using a computer program flow, which may be stored in a computer readable storage medium, such as on a corresponding hardware platform (eg, The system, device, device, device, etc. are executed, and when executed, include one or a combination of the steps of the method embodiments.

Optionally, all or part of the steps of the foregoing embodiments may also be implemented by using an integrated circuit. These steps may be separately fabricated into individual integrated circuit modules, or multiple modules or steps may be fabricated into a single integrated circuit module. achieve. Thus, the invention is not limited to any particular combination of hardware and software.

The various devices/function modules/functional units in the above embodiments may be implemented using a general-purpose computing device, which may be centralized on a single computing device or distributed over a network of multiple computing devices.

Each device/function module/functional unit in the above embodiments can be stored in a computer readable storage medium when implemented in the form of a software function module and sold or used as a standalone product. The above mentioned computer readable storage medium may be a read only memory, a magnetic disk or an optical disk or the like.

It is to be understood by those skilled in the art that variations or substitutions are within the scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Industrial Applicability The present invention provides a method and system for acquiring user equipment serving base station information, where a network element obtains a serving base station identifier of a target UE according to the indication information, or the network element obtains a target UE by sending a paging message. The serving base station identifier is obtained by the network element by sending a query request message to the D2D registration server to obtain the serving base station identifier of the target UE, which realizes that the network element directly obtains the serving base station identifier of the target UE, and solves the method for acquiring the location of the UE. The problem is that the signaling path is long, the network overhead is too large, the load is heavy, and the delay is large.

Claims

Claim

A method for obtaining information about a base station of a user equipment service, comprising:

The network element obtains the serving base station identifier of the target user equipment (UE) according to the indication information, where the network element is any one of the following devices:

UE, base station, mobility management entity (MME), device-to-device D2D registration server (DRS), and network management system.

2. The method for obtaining user equipment serving base station information according to claim 1, wherein the acquiring, by the network element, the serving base station identifier of the target UE according to the indication information comprises:

And obtaining, by the network element, a serving base station identifier of the target UE according to the discovery signal or the discovery signal response message sent by the target UE.

The method for acquiring user equipment serving base station information according to claim 2, wherein the network element acquires a serving base station identifier of the target UE according to a discovery signal or a discovery signal response message sent by the target UE, including :

The method for acquiring user equipment serving base station information according to claim 3, wherein the network element receives the discovery signal or the discovery signal response message sent by the target UE, and the network element directly receives from the target UE. The discovery signal or the discovery signal response message, or indirectly through other network element forwarding, to receive the discovery signal or the discovery signal response message;

The method for obtaining user equipment serving base station information according to claim 3, wherein the information carried by the discovery signal or the discovery signal response message is information indicating the identifier of the serving base station, and the information indicating the identifier of the serving base station includes the following: Any or any of a variety of information:

Base station identity (eNB ID), globally unique cell identity (ECGI), physical cell identity (PCI), And an IP address.

The method for acquiring user equipment serving base station information according to claim 3, wherein the information carried by the discovery signal or the discovery signal response message is a resource of the discovery signal or a discovery signal response message, and the discovery signal or The resources of the discovery signal response message include the time domain, frequency domain, and code domain involved in the discovery signal.

The method for acquiring user equipment serving base station information according to claim 6, wherein the acquiring the serving base station identifier of the target UE according to the information includes:

Obtaining, by the network element, the mapping relationship between the discovery signal sent by the target UE or the resource of the discovery signal response message and the identifier of the base station, or

The method for obtaining user equipment serving base station information according to claim 7, further comprising: negotiating by the neighboring base station, each base station allocating one resource set, and the UEs served by different base stations use different resources to send discovery signals or discovering The signal response message, the resource that the UE served by the base station sends the discovery signal or the discovery signal response message has a one-to-one correspondence with the base station, and the one-to-one correspondence constitutes a resource for the UE to send the discovery signal or the discovery signal response message. Mapping relationship with the base station;

The method for obtaining user equipment serving base station information according to claim 1, wherein the acquiring, by the network element, the serving base station identifier of the target UE according to the indication information comprises:

Obtaining, by the network element, a serving base station identifier of the opposite UE according to the discovery area identifier (discovery area ID) of the target UE; The discovery area ID is carried in any of the following messages:

The method for acquiring user equipment serving base station information according to claim 9, wherein the network element acquires a serving base station identifier of the opposite UE according to the discovery area ID of the target UE, including:

Obtaining, by the network element, the mapping relationship between the discovery area ID and the base station identifier from the locally saved information, or

Obtaining, by the network element, the mapping relationship between the discovery area ID and the base station identifier from another network element; the network element acquiring the service base station identifier of the target UE according to the mapping relationship between the discovery area ID and the base station identifier;

The method for obtaining user equipment serving base station information according to claim 10, wherein the acquiring, by the network element, the serving base station identifier of the target UE according to the mapping relationship between the discovery area ID and the base station identifier, includes:

The method for obtaining user equipment serving base station information according to claim 9, wherein the discovery area ID is allocated by a base station, an MME, a D2D registration server, a network management system, or other network elements.

The method for acquiring user equipment serving base station information according to claim 12, wherein the discovery area ID is allocated by the base station to negotiate between the base stations, and the target UE is allocated a discovery area ID corresponding to the neighboring base station. Discovery zone ID that does not conflict.

The method for acquiring user equipment serving base station information according to claim 1, wherein the acquiring, by the network element, the serving base station identifier of the target UE according to the indication information comprises:

Obtaining, by the network element, a serving base station identifier of the target UE according to the discovery identifier (discovery ID) of the target UE;

The discovery ID is carried in any of the following messages:

The method for acquiring user equipment serving base station information according to claim 14, wherein the network element acquires the serving base station identifier of the target UE according to the discovery ID of the target UE, including:

The network element acquires, from other network elements, a mapping relationship between the discovery ID of the target UE and the base station identifier;

Obtaining, by the network element, a service base station identifier of the target UE according to a mapping relationship between the discovery ID and a base station identifier;

The method for acquiring user equipment serving base station information according to claim 14, further comprising: assigning, by the base station, a different discovery ID set to each UE under the neighboring base station, each discovery ID, when the discovery ID is allocated to the UE. Correspondingly uniquely determining the identity of the base station; or,

When the UE is assigned a discovery ID, the MME allocates different discoveries to the UEs in the neighboring base stations.

ID set, each discovery ID correspondingly determines the base station identifier; or,

The method for acquiring user equipment serving base station information according to claim 16, wherein The D2D registration server is an independent network element, or is in the same network element as the base station or the MME or the network management system or other nodes.

18. A method for obtaining information about a base station of a user equipment service, comprising:

The network element obtains the serving base station identifier of the target user equipment (UE) by sending a paging message; and

The network element is any of the following devices:

The method for obtaining user equipment serving base station information according to claim 18, wherein the network element is a source UE, and the network element obtains a service base station identifier of the target UE by sending a paging message, including:

a target UE, a base station, an MME, a D2D registration service base station, and a network management system; the identifier of the target UE includes: a short format temporary mobile subscriber identity (S-TMSI), an international mobile subscriber identity (IMSI), a globally unique temporary identifier (GUTI), discovery identifier (discovery ID), and Internet Protocol (IP) address;

The method for obtaining user equipment serving base station information according to claim 19, wherein, after the source UE carries the paging message to the peer network element, the source UE further includes:

When the source UE is determined to call the target UE, the target UE replies to the source UE with a paging response message, and carries the own serving base station identifier in the paging response message; The target UE ignores the paging message when it is determined that the source UE is not calling the target UE.

The method for acquiring user equipment serving base station information according to claim 20, wherein the target UE monitors that the discovery signal sent by the source UE carries a paging message, and determines whether the paging message is a paging. The target UE includes:

When matching, the target UE determines that the paging message is paging the target UE itself; when there is no match, the target UE determines that the paging message is not paging the target UE itself.

The method for obtaining user equipment serving base station information according to claim 20, wherein the target UE replies to the source UE with a paging response message, including:

The target UE directly replies to the source UE with a paging response message; or

The method for obtaining user equipment serving base station information according to claim 22, wherein the target UE replies to the source UE with a paging response message, including:

Determining, by the target UE, a status type in which the target UE is located, where the target UE is in a connected state and an idle state;

The method for obtaining user equipment serving base station information according to claim 23, wherein the target UE performs a corresponding operation according to the type of the state in which the target UE is located, including:

The method for obtaining user equipment serving base station information according to claim 23, wherein the target UE performs a corresponding operation according to the type of the state in which the target UE is located, including: When the target UE is in an idle state, the target UE randomly accesses its own serving base station after receiving the paging message;

The method for acquiring user equipment serving base station information according to claim 25, wherein the target UE randomly accesses its own serving base station after receiving the paging message, including: the target UE receiving Immediately after the paging message, the random access procedure and/or the reply paging response message; or,

The method for obtaining user equipment serving base station information according to claim 18, wherein the network element is a base station, and the network element obtains a serving base station identifier of the target UE by sending a paging message, including:

The base station sends a paging message to the neighboring base station on the interface (X2 interface) between the base station and the base station, and the paging target UE includes all the base stations having the X2 interface with the base station or the same base station as the base station. The base station and the base station having the X2 interface, the paging message includes an identifier of the target UE, and the identifier of the target UE includes any one or any of the following information:

S-TMSL IMSL GUTL discovery ID, and IP address;

The method for obtaining user equipment serving base station information according to claim 27, wherein the paging message is a D2D paging message.

The method for acquiring user equipment serving base station information according to claim 27, wherein After the base station sends the paging message to the neighboring base station on the X2 interface, the method further includes: after receiving the paging message, the neighboring base station acquires a state in which the target UE is located, according to the target UE a state in which a paging operation is performed, and a state in which the target UE is in a connected state and an idle state; or

The method for obtaining user equipment serving base station information according to claim 29, wherein acquiring the state of the target UE comprises:

The method for obtaining user equipment serving base station information according to claim 29, wherein before the base station sends a paging message to the neighboring base station on the X2 interface, the method further includes:

Obtaining, by the base station, the status of the target UE is that the base station acquires the UE served by the base station by using an air interface message, where the air interface message includes an air interface message of the cellular communication, and the air interface message of the cellular communication includes: Incoming message, Radio Resource Control (RRC) Connection Request message, RRC Connection Setup Complete message, RRC Connection Reestablishment Request message, RRC Connection Reestablishment Complete message, and RRC Connection Reconfiguration Complete message.

The method for obtaining user equipment serving base station information according to claim 31, wherein the air interface message further comprises: a D2D connection establishment request message and a D2D paging request message.

The method for obtaining user equipment serving base station information according to claim 29, further comprising: the target UE transmitting, in a discovery signal (beacon signal), a state in which the target UE is located to other network elements.

The method for obtaining user equipment serving base station information according to claim 29, wherein the performing a paging operation according to a state in which the target UE is located includes: When the target UE is in the connected state, the neighboring base station checks whether the target UE saves the serving base station information of the target UE in the serving cell of the neighboring base station or in the neighboring base station,

The method for obtaining user equipment serving base station information according to claim 29, wherein after the performing, by the neighboring base station, the paging operation, the method further includes:

The method for acquiring user equipment serving base station information according to claim 36, wherein the paging message further includes a state in which the target UE is located, and a state in which the target UE is in an idle state and a connected state. .

38. The method for acquiring user equipment serving base station information according to claim 36, wherein The base station sends a paging message to the MME on the SI interface. After paging the target UE, the method further includes: after the MME receives the paging message sent by the base station, performing a paging operation.

The method for obtaining user equipment serving base station information according to claim 38, wherein after the MME receives the paging message sent by the base station, performing a paging operation includes:

Determining, by the MME, whether the MME saves the serving base station information of the target UE; and

When the MME saves the serving base station information of the target UE, the MME directly sends a paging response message to the base station, where the paging response message carries the service base station identifier of the target UE.

The method for obtaining user equipment serving base station information according to claim 39, wherein, after the MME determines whether the MME saves the serving base station information of the target UE, the method further includes:

The method for obtaining user equipment serving base station information according to claim 40, wherein the MME determines a paging area, and after the paging area sends a paging message, the method further includes: when the target UE receives After the paging message sent by the MME, randomly accessing the serving base station cell of the target UE, and/or sending a paging response to the serving base station of the target UE;

The method for obtaining user equipment serving base station information according to claim 40, wherein the MME determines a paging area, and after the paging area sends a paging message, the method further includes: when the target UE receives After the paging message, randomly accessing the serving base station cell of the target UE, and/or transmitting a paging response message to the serving base station of the target UE; The serving base station of the target UE sends a paging response message to the MME, and the MME forwards the paging message to the base station.

43. A method for obtaining information about a base station of a user equipment service, comprising:

The network element obtains the serving base station identifier of the target user equipment (UE) by sending a query request message to the device to the device D2D registration server (DRS);

The network element is any of the following devices:

UE, base station, and mobility management entity (MME).

The method for obtaining user equipment serving base station information according to claim 43, wherein the query request carries an identifier of the target UE, and the identifier of the target UE is any one or any of the following information. :

The method for obtaining user equipment serving base station information according to claim 43, wherein the D2D registration server saves the serving base station information of the D2D UE, is an independent network element or is connected to the base station or the MME or the network management system or The other nodes are in the same network element.

The method for obtaining user equipment serving base station information according to claim 44, wherein the query request message carries a cell (IE) indicating that the serving base station identifier of the target UE is queried.

The method for obtaining user equipment serving base station information according to claim 43, wherein, after the network element obtains the serving base station identifier of the target UE by sending the query request message to the D2D registration server, the method further includes:

When the result of the determination is that the serving base station information of the target UE is not saved, the D2D registration The server sends a query failure message to the network element, or triggers a paging process, or does not perform an operation.

The method for obtaining user equipment serving base station information according to claim 47, wherein the query response message carries an IE indicating that the serving base station identifier of the target UE is queried.

The method for obtaining user equipment serving base station information according to claim 47, wherein the query failure message carries a failure indicating that the serving base station identifier of the target UE is failed.

IE.

The method for acquiring user equipment serving base station information according to claim 47, wherein the D2D registration server triggers a paging process, including: the D2D registration server sends a paging message or a paging indication message to the base station or the MME, and triggers The base station or MME pages the target UE.

A system for acquiring user equipment serving base station information, comprising: a network element and a target UE; the network element, configured to acquire a serving base station identifier of the target UE according to the indication information; the network element is any one of the following Equipment:

The system for acquiring user equipment serving base station information according to claim 51, wherein the network element is configured to receive a discovery signal or a discovery signal response message sent by the target UE, from the discovery signal or the discovery signal. And parsing the information carried in the discovery signal or the discovery signal response message in the response message, and acquiring the serving base station identifier of the target UE according to the information.

The system for acquiring user equipment serving base station information according to claim 51, wherein the network element is configured to acquire a service base station identifier of the opposite UE according to the discovery area ID of the target UE;

The discovery area ID is carried in any of the following messages:

The system for acquiring user equipment serving base station information according to claim 51, wherein the network element is configured to acquire a service base station identifier of the target UE according to a discovery ID of the target UE;

The discovery ID is carried in any of the following messages:

55. A system for acquiring user equipment serving base station information, comprising: a network element and a target UE; the network element configured to acquire a serving base station identifier of the target UE by sending a paging message;

The network element is any of the following devices:

UE, base station, mobility management entity (MME), and device-to-device D2D registration server

(DRS).

The system for acquiring user equipment serving base station information according to claim 55, wherein the network element is configured to carry a paging message in the discovery signal and send the message to the peer network element, where the paging message includes The identifier of the target UE, where the peer network element is any of the following devices:

The system for acquiring user equipment serving base station information according to claim 56, wherein the target UE is configured to carry a paging message in the discovery signal sent by the network element, and determine the paging. Whether the message is to page the target UE,

The system for acquiring user equipment serving base station information according to claim 55, wherein the system further comprises a neighboring base station;

S-TMSL IMSL GUTL discovery ID, and IP address;

The system for acquiring user equipment serving base station information according to claim 58, wherein the neighboring base station is configured to acquire, after receiving the paging message, a state in which the target UE is located, according to Performing a paging operation in a state in which the target UE is located, where the target UE is in a connected state and an idle state; or

After receiving the paging message, the paging operation is directly performed.

The system for acquiring user equipment serving base station information according to claim 58, wherein, before the network element sends a paging message to the neighboring base station on the X2 interface, the network element acquires the target by: The status of the UE:

The air interface message is obtained by the UE served by the network element, and the air interface message includes an air interface message of the cellular communication, where the air interface message of the cellular communication includes: a random access message, a radio resource control (RRC) connection request message, and an RRC connection. A setup complete message, an RRC Connection Reestablishment Request message, an RRC Connection Reestablishment Complete message, and an RRC Connection Reconfiguration Complete message.

The system for acquiring user equipment serving base station information according to claim 60, wherein the target UE is further configured to: when the target UE is in a serving cell of the neighboring base station, receive the neighboring base station to send Immediately after the paging message, the random access procedure and/or the reply paging response message; or,

When the target UE is in the serving cell of the neighboring base station, when a tracking area update (TAU) period arrives, a random access procedure and/or a reply response message is performed in the TAU procedure; The paging response message is a random access message or a TAU message or an air interface message.

62. The system for acquiring user equipment serving base station information according to claim 59, wherein the system further includes an MME;

63. A system for acquiring user equipment serving base station information, comprising: a network element, a device to device D2D registration server (DRS), and a target user equipment (UE);

The network element is any of the following devices:

UE, base station, and mobility management entity (MME).

The system for acquiring user equipment serving base station information according to claim 63, wherein the D2D registration server is configured to determine whether the service base station information of the target UE is saved;