WO2015154392A1

WO2015154392A1 - Switching implementation method and device for d2d service

Info

Publication number: WO2015154392A1
Application number: PCT/CN2014/087351
Authority: WO
Inventors: 李大鹏; 陈琳
Original assignee: 中兴通讯股份有限公司
Priority date: 2014-07-15
Filing date: 2014-09-24
Publication date: 2015-10-15
Also published as: CN105307220A

Abstract

Provided are a switching implementation method and device for a D2D service. The switching realization method comprises: sending, by a source base station, a D2D service switching request message to a target base station; receiving, by the source base station, first configuration information configured for a terminal by the target base station according to the service switching request message, wherein the first configuration information is configuration information required for executing a D2D service by the terminal; and sending, by the source base station, the first configuration information to the terminal. By means of the technical solution, the technical problems in the related art that there is no D2D service switching flow, etc. are solved, thereby facilitating a terminal in implementing the switching of a D2D service and improving the user experience.

Description

Method and device for switching D2D service

Technical field

The present invention relates to the field of communications, and in particular, to a method and an apparatus for implementing a device-to-device (D2D) service switching.

Background technique

With the development of wireless multimedia services, people's demand for high data rates and user experience is increasing, which puts high demands on the system capacity and coverage of traditional cellular networks. On the other hand, the popularity of applications such as social networking, near-field data sharing, and local advertising has led to an increasing demand for people who understand and communicate with nearby people (such as proximity services). Traditional base station-centric cellular networks have significant limitations in supporting high data rates and Proximity Services (ProSeimity Services). In this context, D2D technologies representing the future of communications technology development should be shipped. Born. 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 proximity services.

The D2D service can work in the licensed or unlicensed band, and allows multiple D2D-enabled user equipments, that is, D2D User Equipment (D2D UEs) to be deployed with or without network infrastructure. D2D business. The D2D service usually includes: a D2D discovery technology and a D2D communication technology; wherein the D2D discovery technology is used to determine/determine the proximity between two or more D2D user devices (for example, within a D2D communication range) or A technique for determining/determining that the first user equipment is adjacent to the second user equipment. Generally, D2D user equipment can discover each other by sending or receiving discovery signals/information. Under the coverage of cellular network, the network can assist D2D user equipment to perform D2D discovery; D2D communication technology refers to partial or complete communication between D2D user equipments. A technology in which data can communicate directly without going through a network infrastructure.

Terminals in the vicinity use D2D communication to bring many benefits to the terminal, such as higher speed, lower latency and lower power consumption, and also greatly improve the wireless resource efficiency of the operator. The D2D Relay mode has It is beneficial for operators to improve wireless coverage; for applications, the use of proximity information in the D2D communication process can develop more attractive new services. The Public Safety system can also use D2D technology to enable communication between terminals without wireless coverage.

D2D discovery technology may be divided into two different ways, one is D2D Direct Discovery, and the other is Evolved Packet Core (EPC), which is saved through the core network. The geographical location information of the terminal, and further provides D2D discovery function according to this information.

The transmission of the D2D communication and the transmission of the D2D discovery may be further divided into two modes according to the resource allocation manner; for the transmission of the D2D communication, the mode 1 (Mode 1) and the mode 2 (Mode 2) are included; The mode 1 refers to a base station scheduling resource; the mode 2 refers to a UE autonomously selecting a resource; and for the D2D discovery transmission, it is classified into a type 1 (type 1) and a type 2 (type 2); wherein the type 1 manner It means that the resource allocation process is not allocated according to the granularity of a certain UE; the mode of the second type means that the resource allocation process is allocated according to the granularity of the UE.

In the 3rd Generation Partnership Project (3GPP) architecture, a handover process can be used for the mobility of a terminal in a connected state; however, this process mainly considers a traditional single The D2D scenario is not considered in the existing handover process, that is, there is no handover process supporting the D2D service in the prior art.

There is no effective solution to the above problems in the related art.

Summary of the invention

In the related art, there is no technical problem such as a handover procedure of a D2D service, and the present invention provides a method and an apparatus for implementing handover of a D2D service to solve at least the above technical problem.

According to an embodiment of the present invention, a method for implementing handover of a D2D service is provided, including: a source base station transmitting a D2D service handover request message to a target base station; and the source base station receiving the target base station according to the service handover request message The first configuration information of the terminal configuration, the first configuration message is configuration information required for the terminal to perform D2D service, and the source base station sends the first configuration information to the terminal.

Preferably, the handover request message carries the following information: the source base station is second configuration information configured by the terminal to perform D2D service; and the second configuration information is used by the target base station to determine the first configuration information. Provide evidence.

Preferably, the first configuration information and/or the second configuration information at least includes: D2D service type information.

Preferably, the first configuration information and/or the second configuration information further includes at least one of the following: a resource allocation mode, resource information, and D2D group information.

Preferably, the resource allocation mode includes at least one of the following: a transmission mode 1 of D2D communication, a transmission mode 2 of D2D communication, a transmission type 1 of D2D discovery, and a transmission type 2 of D2D discovery.

Preferably, the resource information includes at least one of the following: a resource configuration effective value, a resource pool information, a network temporary identifier, a D2D semi-persistent scheduling interval, a D2D semi-persistent scheduling frame offset, and a D2D semi-persistent scheduling subframe offset.

Preferably, the resource pool information includes at least one of the following: a sending resource pool for D2D discovery, a receiving resource pool for D2D discovery, a sending resource pool for D2D communication, and an accepting resource pool for D2D communication.

Preferably, the network temporary identifier comprises at least one of the following: a D2D air network temporary identifier, and a D2D semi-continuous air network temporary identifier.

Preferably, the D2D service type information includes at least one of the following: D2D discovery, D2D communication.

Preferably, the D2D discovery comprises: transmission of D2D discovery and acceptance of /D2D discovery; the D2D communication comprises: transmission of the D2D communication and/or acceptance of the D2D communication.

According to another aspect of the present invention, a device to device D2D service switching implementation method is further provided, including:

The target base station receives the D2D service switching request message from the source base station; the target base station allocates first configuration information to the terminal according to the D2D service switching request message, where the first configuration message is configuration information required for the terminal to perform D2D service. The target base station sends the first configuration information to the source base station.

Preferably, the target base station allocates first configuration information to the terminal according to the D2D service switching request message, and includes one of the following: the target base station directly allocates the terminal to the terminal triggered by the D2D service switching request message. The first configuration information, the first configuration message is configuration information required for the terminal to perform a D2D service; the target base station acquires second configuration information from the D2D service switching request message, where the second configuration The information is information that is configured by the source base station to perform D2D service for the terminal; and the target base station determines, according to the second configuration information, the first configuration information that is allocated to the terminal.

According to still another embodiment of the present invention, a device for implementing D2D service switching is further provided, which is applied to a source base station, and includes: a first sending module, configured to send a D2D service switching request message to a target base station; and a receiving module, configured to Receiving, by the target base station, first configuration information configured by the terminal according to the service switching request message, where The first configuration message is configuration information required for the terminal to perform D2D service, and the second sending module is configured to send the first configuration information to the terminal.

Preferably, the first sending module is further configured to send the handover request message that carries the following information: the source base station is second configuration information configured by the terminal to perform D2D service; and the second configuration information is The target base station determines the first configuration information providing basis.

According to still another embodiment of the present invention, a D2D service switching implementation apparatus is further provided, which is applied to a target base station, and includes: a receiving module, configured to receive a D2D service switching request message from a source base station; and an allocation module, configured to The D2D service switching request message is configured to allocate first configuration information to the terminal, where the first configuration message is configuration information required for the terminal to perform D2D service, and the sending module is configured to send the first configuration information to the source base station. .

Preferably, the allocating module includes: an allocating unit, configured to directly allocate the first configuration information to the terminal, where the first configuration message is D2D for the terminal, triggered by the D2D service switching request message The configuration information required by the service; or the acquiring unit is configured to obtain the second configuration information from the D2D service switching request message, where the second configuration information is configured by the source base station to perform D2D service for the terminal And a determining unit configured to determine the first configuration information allocated for the terminal according to the second configuration information.

According to the present invention, the source base station sends a handover request message to the target base station, and receives the first configuration information sent by the target base station according to the handover request message, and solves the technical problem that the handover process of the D2D service does not exist in the related art. It facilitates the terminal to switch D2D services and improves the user experience.

DRAWINGS

The drawings described herein are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:

1 is a flowchart of a method for implementing handover of a D2D service according to an embodiment of the present invention;

2 is a structural block diagram of a device for implementing D2D service switching according to an embodiment of the present invention;

3 is a flowchart of a method for implementing handover of another D2D service according to an embodiment of the present invention;

4 is a block diagram showing another structure of a device for implementing D2D service switching according to an embodiment of the present invention;

FIG. 5 is a block diagram showing another structure of a switching implementation apparatus based on the D2D service shown in FIG. 5;

6 is a schematic diagram of a network architecture of D2D service switching according to an embodiment of the present invention;

FIG. 7 is a schematic flowchart diagram of a D2D handover information configuration method according to Embodiment 1 of the present invention; FIG.

FIG. 8 is a schematic flowchart diagram of a method for configuring D2D handover information according to Embodiment 2 of the present invention.

detailed description

The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

FIG. 1 is a flowchart of a method for implementing handover of a D2D service according to an embodiment of the present invention. As shown in Figure 1, the following processing steps are included:

Step S102: The source base station sends a D2D service switching request message to the target base station.

Step S104: The source base station receives the first configuration information that is configured by the target base station according to the foregoing service switching request message, where the first configuration message is configuration information required by the terminal to perform D2D service.

Step S106: The source base station sends the first configuration information to the terminal.

Through the above various processing steps, since the source base station transmits the configuration information of the target base station to the terminal through the handover procedure, the switching of the D2D service is supported in the handover procedure.

In a preferred embodiment of the present embodiment, the handover request message carries the following information: the source base station is second configuration information configured by the terminal to perform D2D service; and the second configuration information is used by the target base station to determine the first configuration information. Provide evidence. Of course, the target base station may also not consider the second configuration information in certain scenarios, which may be determined according to actual conditions.

For the case where the second configuration information is carried in the handover request message, the following implementation process (including steps 1-2) may be performed in a specific application, but is not limited thereto:

Step 1: The source base station sends the D2D configuration information of the source base station to the target base station by using a message. The message may be a HANDOVER REQUEST message of the X2 interface, or may be a HANDOVER REQUIRED and a HANDOVER REQUEST message of the S1 interface, in this case being forwarded by the MME to the target base station; or may be a new message;

The D2D configuration information may be carried in the Source to Target Transparent Container field of the S1 interface or the RRC context field of the X2 interface in the message, or may be carried in a new field directly in the message body;

Preferably, the foregoing first configuration information and/or the second configuration information at least includes: D2D service type information.

Optionally, the first configuration information and/or the second configuration information further includes at least one of the following: a resource allocation mode, resource information, and D2D group information, where the D2D group information refers to an adjacent layer 2 group identifier (ProSe Layer-2 Group ID). ), used to identify a group of users.

among them:

The resource allocation mode includes at least one of the following: a transmission mode 1 (Mode1) of D2D communication, a transmission mode 2 (Mode2) of D2D communication, a transmission type 1 (Type1) of D2D discovery, and a transmission type 2 (Type 2) of D2D discovery.

The foregoing resource information includes at least one of the following: a resource configuration effective value, a resource pool information, a network temporary identifier, a D2D semi-persistent scheduling interval, a D2D semi-persistent scheduling frame offset, and a D2D semi-persistent scheduling subframe offset.

The resource pool information includes at least one of the following: a sending resource pool for D2D discovery, a receiving resource pool for D2D discovery, a sending resource pool for D2D communication, and an accepting resource pool for D2D communication.

The network temporary identifier includes at least one of the following: a D2D air network temporary identifier, and a D2D semi-persistent (SPS: semi persistence schedule) air network temporary identifier (D2D-SPS-RNTI).

The D2D service type information includes at least one of the following: D2D discovery, D2D communication. The D2D discovery includes: transmission of D2D discovery and acceptance of /D2D discovery; the above D2D communication includes: transmission of the above D2D communication and acceptance of the above D2D communication. In the specific application process, it can be expressed as the following application forms:

For example, the UE may only perform the D2D discovery service at the source base station and needs to perform the handover, and the source base station may carry the indication information of the D2D discovery in the handover request message.

For example, the UE has a D2D communication service and a D2D discovery service in the source base station and needs to perform handover, and the source base station may simultaneously carry the indication of the D2D discovery and the indication of the D2D communication in the handover request message.

For example, the UE has the D2D communication discovery service at the source base station and needs to switch to the target cell, and the source base station may carry the D2D communication transmission indication in the handover request message.

The indication of the D2D service type can also be transmitted in an implicit manner. For example, if the D2D service type is not explicitly configured in the message, the target base station can determine the D2D service type by using other carried parameters, for example, the source base station carries the mode type. The target base station can determine, by using the mode 1, that the UE performs the D2D communication discovery service at the source base station; the target base station can also obtain the resource pool of the D2D communication type or the D2D discovery resource resource by the resource allocated by the source base station. To determine the type of D2D service;

The source base station selects different parameter combinations according to the D2D service type of the UE, and transmits the parameters to the target base station through a message:

For example, if the D2D service type is accepted by the D2D discovery, the source base station sends the received resource pool information used by the UE at the source base station to the target base station;

For example, if the D2D service type is the transmission of the D2D discovery, if it is the type 1 (Type 1) resource allocation mode, the source base station uses the D2D resource allocation mode used by the UE in the source base station, and the D2D discovered transmission resource pool information. The group information is sent to the target base station; if it is the resource allocation mode of type 2, if the dynamic scheduling scheduling method is used at the same time, the source base station allocates the resource pool mode of the D2D resource used by the source base station to the D2D resource used by the source base station. The group information is sent to the target base station; if the type 2 (Type 2) uses the semi-persistent scheduling method at the same time, the source base station uses the D2D resource allocation mode used by the source base station and the D2D discovery transmission resource pool information. , group information, resource configuration validity period, D2D semi-persistent scheduling interval, D2D semi-persistent scheduling frame/subframe offset and other information are sent to the target base station;

For example, if the D2D service type is accepted by the D2D communication, the source base station sends the received resource pool information of the D2D communication used by the UE at the source base station to the target base station;

For example, if the D2D service type is the transmission of the D2D communication, if it is the mode 2 (Mode 2) resource allocation mode, the source base station uses the D2D resource allocation mode used by the UE in the source base station, and the transmission resource pool information of the D2D communication. The group information is sent to the target base station; if it is the mode allocation mode of Mode 1 (Mode 1), if the scheduling method is dynamic scheduling, the source base station sends the D2D resource allocation mode used by the UE in the source base station, and the D2D communication is sent. Resource pool information, group information is sent to the target base station; if Mode 1 uses a semi-persistent scheduling method at the same time, the source base station transmits the D2D resource allocation mode and D2D communication used by the UE at the source base station. Information such as resource pool information, group information, resource configuration validity period, D2D semi-persistent scheduling interval, and D2D semi-persistent scheduling frame/subframe offset are sent to the target base station.

Step 2: After receiving the handover request message, the target base station determines that the D2D service needs to be allocated resources in advance through the D2D service type information. For example, if the D2D service type information is D2D discovery/communication, the base station performs an admission control function, and then allocates a cell for the UE. Identification and D2D discovery/communication resources;

If the handover request message also carries information such as resource allocation mode, resource information, etc., the target base station refers to the information when allocating resources.

For example, if the D2D service type is accepted by the D2D discovery, the target base station refers to the source base station configuration, allocates the target base station network temporary identifier (D2D RNTI), the received resource pool information of the D2D discovery, the resource configuration validity period, and sends the source to the source. Base station

For example, in the case that the D2D service type is the transmission of the D2D discovery, if it is the resource allocation mode of the type 1 (Type 1), the target base station refers to the source base station configuration, allocates the D2D resource allocation mode for the UE, and the target base station network temporary identifier (D2D RNTI). The transmission resource pool information discovered by the target base station D2D, the resource configuration validity period, and sent to the source base station; if it is the type 2 resource allocation mode, if the dynamic scheduling scheduling method is simultaneously adopted, the target base station refers to the source base station configuration, Allocating a D2D resource allocation mode, a base station network temporary identifier (D2D RNTI), a transmission resource pool information discovered by the target base station D2D, a resource configuration validity period, and transmitting to the source base station; if type 2 (Type 2) is simultaneously used half For the static scheduling scheduling method, the target base station is configured with reference to the source base station, and allocates a D2D resource allocation mode, a base station network temporary identifier (D2D-SPS-RNTI), a D2D discovery transmission resource pool information used by the target base station, and a resource configuration validity period. , D2D semi-persistent scheduling interval, D2D semi-persistent scheduling frame/subframe offset and other information, and sent to the source base station;

For example, if the D2D service type is accepted by the D2D communication, the target base station refers to the received resource pool information of the D2D communication used by the source base station, and allocates a target base station network temporary identifier (D2D RNTI) for the UE, and the received resource of the D2D communication. Pool information, the resource configuration validity period, and sent to the source base station;

For example, if the D2D service type is the transmission of the D2D communication, if it is the resource allocation mode of the mode 2, the target base station refers to the source base station configuration, allocates the D2D resource allocation mode for the UE, and the target base station network temporary identifier (D2D RNTI). The transmission resource pool information of the target base station D2D communication, the resource configuration validity period, and sent to the source base station; if it is the mode 1 (Mode 1) resource allocation mode, if the dynamic scheduling scheduling method is simultaneously adopted, the target base station refers to The source base station is configured to allocate a D2D resource allocation mode, a base station network temporary identifier (D2D RNTI), a communication resource pool information of the target base station D2D communication, a resource configuration validity period, and send the same to the source base station; if mode 1 (Mode 1) simultaneously The semi-persistent scheduling method is adopted, and the target base station refers to the source base station configuration, and allocates a D2D resource allocation mode, a base station network temporary identifier (D2D-SPS-RNTI), and a transmission resource pool information of the D2D communication used by the target base station. , resource configuration validity period, D2D semi-persistent scheduling interval, D2D semi-persistent scheduling frame/subframe offset, etc., and sent to the source base station In the case of optimization, the target base station can allocate a different resource allocation pattern to the terminal than the original base station; because the type 2 of the D2D discovery and the mode of the D2D communication are all methods of dynamically acquiring resources by using the network, this method and D2D discovery The type 1 is more complicated in the handover procedure than the mode 2 of the D2D communication; on the other hand, since the resources of the source base station and the target base station are used differently, for example, the source base station has fewer types of terminal usage, However, the target base station uses the type 2 terminal to cause the resource pool resource of type 2 to be tight. Therefore, considering the above two aspects, the target base station can allocate a different resource allocation pattern to the original base station, for example, the source base station terminal uses in D2D discovery. The resource allocation mode is type two, and the target base station may allocate the type 1 resource allocation mode to the terminal; for example, the resource allocation mode used by the source base station terminal in D2D communication is mode one, and the target base station may allocate the terminal. Mode 2 resource allocation mode;

In the case of optimization, the target base station may allocate the same or similar resources to the original base station, because the resource pools of the source base station and the target base station have different scenarios, so the target base station may allocate the original base station when allocating resources. The content of different resource pools, which improves the complexity of the terminal processing. Considering the complexity of reducing handover, the target base station can allocate resources of the same resource pool or similar resource pool to the terminal when allocating resources;

The message may be a HANDOVER REQUEST ACKNOWLEDGE message of the X2 interface, or may be a HANDOVER REQUIREDACKNOWLEDGE and a HANDOVER COMMAND message of the S1 interface, in this case being forwarded by the MME to the target base station; or may be a new message;

The D2D configuration information may be carried in the message by the Target to Source Transparent Container in the S1 message, or may be carried in the Target to Source Transparent Container field of the X2 interface; or may be carried in the message body by using a new field;

Step S106 may send the configuration information to the terminal by using a radio resource control RRC message.

In this embodiment, a device for implementing D2D service switching is further provided, which is applied to a source base station. As shown in FIG. 2, the device includes the following modules:

The first sending module 20 is configured to send a D2D service switching request message to the target base station;

The receiving module 22 is connected to the first sending module 20, and is configured to receive first configuration information that is configured by the target base station according to the service switching request message, where the first configuration message is configuration information required for the terminal to perform D2D service.

The second sending module 24 is connected to the receiving module 22 and configured to send the first configuration information to the terminal.

In a preferred embodiment of the present embodiment, the first sending module 20 is further configured to send the foregoing handover request message carrying the following information: the source base station is second configuration information configured by the terminal to perform D2D service; the second configuration The information is used by the target base station to determine the basis for providing the first configuration information.

The above embodiment is mainly described from the source base station side, and an implementation scheme based on the target base station side is also provided in this embodiment. As shown in FIG. 3, the method for implementing handover of a D2D service provided by this embodiment includes the following processing steps:

Step S302, the target base station receives a D2D service switching request message from the source base station;

Step S304: The target base station allocates first configuration information to the terminal according to the D2D service switching request message, where the first configuration message is configuration information required for the terminal to perform D2D service.

Step S306: The target base station sends the first configuration information to the source base station.

There are various implementations of the step S304, for example, the following may be implemented, but is not limited thereto:

(1) The target base station directly allocates the first configuration information to the terminal, and the first configuration message is configuration information required for the terminal to perform D2D service, triggered by the D2D service switching request message;

(2) The target base station obtains second configuration information from the D2D service switching request message, where the second configuration information is information configured by the source base station to perform D2D service for the terminal; and the target base station determines, according to the second configuration information, that The first configuration information allocated by the terminal.

In a preferred embodiment, the foregoing first configuration information and/or the second configuration information includes at least: D2D service type information. Optionally, at least one of the following may also be included: a resource allocation mode, resource information, and D2D group information.

In this embodiment, a device for implementing D2D service switching is further provided, which is applied to a target base station. As shown in FIG. 4, the device includes:

The receiving module 40 is configured to receive a D2D service switching request message from the source base station;

The distribution module 42 is connected to the receiving module 40, and is configured to allocate the first configuration information to the terminal according to the D2D service switching request message, where the first configuration message is configuration information required for the terminal to perform the D2D service;

The sending module 44 is connected to the allocating module 42 and configured to send the first configuration information to the source base station.

In a preferred embodiment of the embodiment, as shown in FIG. 5, the distribution module 42 includes the following processing units, but is not limited thereto:

The allocating unit 420 is configured to directly allocate the first configuration information to the terminal by using the D2D service switching request message, where the first configuration message is configuration information required for the terminal to perform D2D service; or

The obtaining unit 422 is configured to obtain the second configuration information from the D2D service switching request message, where the second configuration information is information configured by the source base station to perform D2D service for the terminal, and the determining unit 424, The connection to the obtaining unit 422 is configured to determine the first configuration information allocated to the terminal according to the second configuration information.

In order to better understand the above embodiments, the following detailed description will be given in conjunction with the preferred embodiments. The following embodiments may be implemented based on the architecture shown in FIG. 6, but are not limited thereto.

Embodiment 1

In this embodiment, the S1 handover is taken as an example, and the D2D handover information configuration method is further described in detail. In this example, the D2D performs the D2D discovery transmission at the source base station, and the resource allocation mode is type one. As shown in FIG. 7, the method includes the following steps:

Step S702, the terminal performs a D2D discovery service, and the source base station determines to perform the S1 handover according to the terminal measurement situation and the network configuration.

The terminal performs the transmission of the D2D discovery service, and the resource allocation mode is Type 1 (Type 1). The source base station obtains resource pool information, resource allocation mode information, and group information used for D2D service transmission through the RRC connection.

Step S704, the source base station sends a handover request message to the MME;

The source base station acquires the D2D service type information and the resource allocation mode, and the information source base station transmits the D2D service type, the D2D resource allocation mode, the group information, and the D2D discovery transmission resource pool information used by the source base station to the target base station by the source base station;

The source base station fills in the information in the handover request (HANDOVER REQUIRED) message and sends it to the MME;

Step S706: After receiving the handover request message, the mobility management entity (Mobile Management Entity, hereinafter referred to as MME) sends a handover request message (HANDOVER REQUEST) to the target base station, where the D2D resource configuration information of the UE is included.

Step S708, after receiving the handover request message, the target base station performs local processing such as admission control and resource allocation according to the D2D resource configuration information of the UE.

If the admission fails, the target base station will return a handover failure message;

After the admission is successful, the target base station refers to the source base station configuration, and allocates a D2D resource allocation mode, a target base station network temporary identifier (D2D RNTI), a transmission resource pool information discovered by the target base station D2D, a resource configuration validity period, and is sent to the source base station.

Step S710: The target base station sends a handover request acknowledgement message (HANDOVER REQUEST ACKNOWLEDGE) to the MME, where the message includes D2D resource configuration information allocated by the target base station;

Step S712, the MME sends a handover command (HANDOVER COMMAND) to the source base station;

Step S714, after the source base station receives the handover command message (HANDOVER COMMAND), the source base station sends a handover command to the terminal through the air interface; the message includes the D2D resource configuration information allocated by the target base station;

Embodiment 2

In this embodiment, the X2 switching is taken as an example, and the D2D switching information configuration method is further described in detail. In this example, D2D performs D2D communication transmission at the source base station, and the resource allocation mode is mode one; as shown in FIG. 8, the following steps are included:

Step S802, the terminal performs a D2D communication service, and the source base station determines an X2 handover step S804 according to the terminal measurement situation and the network configuration, and the source base station sends a handover request message to the target base station;

The source base station acquires D2D service type information, resource allocation mode, resource information, and the like;

If the scheduling method is a dynamic scheduling, the source base station sends the D2D resource allocation mode used by the source base station and the transmission resource pool information of the D2D communication to the target base station; if a semi-persistent scheduling method is used at the same time, The source base station sends the D2D resource allocation mode used by the source base station, the transmission resource pool information of the D2D communication, the resource configuration validity period, the D2D semi-persistent scheduling interval, and the D2D semi-persistent scheduling frame/subframe offset information to the target base station. ;

Step S806, after receiving the handover request message, the target base station performs local processing such as admission control and resource allocation according to the D2D resource configuration information of the UE.

If the scheduling is successful, if the scheduling method is dynamically scheduled, the target base station refers to the source base station configuration, and allocates a D2D resource allocation mode, a base station network temporary identifier (D2D RNTI), a communication resource pool information of the target base station D2D communication, and resource configuration. The validity period is sent to the source base station; if the semi-persistent scheduling method is adopted, the target base station refers to the source base station configuration, and the D2D resource configuration information allocated for the UE includes the D2D resource allocation mode and the base station network temporary identifier (D2D-SPS- RNTI), the transmission resource pool information of the D2D communication used by the target base station, the resource configuration validity period, the D2D semi-persistent scheduling interval, and the D2D semi-persistent scheduling frame/subframe offset information;

Step S808: The target base station sends a handover request acknowledgement message (HANDOVER REQUEST ACKNOWLEDGE) to the source base station, where the message includes D2D resource configuration information.

Step S810, after the source base station receives the handover request acknowledgement message, the source base station sends a handover command to the terminal through the air interface, where the message includes the D2D resource configuration information.

Embodiment 3

In this embodiment, the X2 switching is taken as an example, and the D2D switching information configuration method is further described in detail. In this example, the change of the resource allocation mode is performed in the handover process. In this example, the D2D performs the D2D communication transmission service at the source base station, the resource allocation mode is mode 1, and the resource allocation mode after the handover is mode 2; The implementation process is similar to the process shown in Figure 8, including the following steps:

Step 1: The terminal performs the D2D communication service, and the source base station determines to perform the X2 handover according to the measurement situation of the terminal and the network configuration. Step 2: The source base station sends a handover request message to the target base station;

Step 3: After receiving the handover request message, the target base station performs local processing such as admission control and resource allocation according to the D2D resource configuration information of the UE.

After the admission is successful, the target base station allocates a resource allocation mode to the UE as mode 2 (Mode 2); the target base station allocates a D2D resource allocation mode 2, a target base station network temporary identifier (D2D RNTI), and a target base station D2D communication transmission resource. Pool information, the resource configuration validity period, and sent to the source base station;

Step 4: The target base station sends a handover request acknowledgement message (HANDOVER REQUEST ACKNOWLEDGE) to the source base station, where the message includes D2D resource configuration information.

After the source base station receives the handover request acknowledgement message, the source base station sends a handover command to the terminal through the air interface, where the message includes the D2D resource configuration information.

Embodiment 4

In this embodiment, the X2 switching is taken as an example, and the D2D switching information configuration method is further described in detail. In this example, the D2D performs the D2D communication receiving service at the source base station; the implementation process of this embodiment is similar to the process shown in FIG. 8, and includes the following steps:

Step 1: The terminal performs the D2D communication accepting service, and the source base station determines to perform the X2 handover according to the terminal measurement situation and the network configuration. Step 2: The source base station sends a handover request message to the target base station;

The source base station obtains the D2D service type information as the acceptance of the D2D communication; the source base station sends the received resource pool information of the D2D communication used by the UE at the source base station to the target base station;

After the admission is successful, the target base station is configured with reference to the source base station, and allocates a target base station network temporary identifier (D2D RNTI), a received resource pool information of the D2D communication, a resource configuration validity period, and is sent to the source base station;

In summary, based on the technical solution provided by the embodiment of the present invention, the terminal can implement the D2D switching service and improve the user experience.

In another embodiment, software is also provided for performing the technical solutions described in the above embodiments and preferred embodiments.

In another embodiment, a storage medium is further provided, wherein the software includes the above-mentioned software, including but not limited to: an optical disk, a floppy disk, a hard disk, an erasable memory, and the like.

It will be apparent to those skilled in the art that the various modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from The steps shown or described are performed sequentially, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated into a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.

The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Industrial applicability

Based on the foregoing technical solution provided by the present invention, the source base station sends a handover request message to the target base station, and receives the first configuration information sent by the target base station according to the handover request message, and solves the problem that the D2D service does not exist in the related art. Technical problems such as switching processes facilitate the terminal to switch D2D services and improve the user experience.

Claims

A device-to-device D2D service switching implementation method includes:

The source base station sends a D2D service switching request message to the target base station;

The source base station receives first configuration information that is configured by the target base station according to the service switching request message, where the first configuration message is configuration information required for the terminal to perform D2D service;

The source base station sends the first configuration information to the terminal.
The method according to claim 1, wherein the handover request message carries the following information: the source base station is second configuration information configured by the terminal to perform D2D service; the second configuration information is the target The base station determines the basis for providing the first configuration information.
The method of claim 2, wherein the first configuration information and/or the second configuration information comprises at least: D2D service type information.
The method of claim 3, wherein the first configuration information and/or the second configuration information further comprises at least one of the following:

Resource allocation mode, resource information, D2D group information.
The method of claim 4, wherein the resource allocation pattern comprises at least one of the following:

The transmission mode of D2D communication, the transmission mode of D2D communication, the transmission type of D2D discovery, and the transmission type of D2D discovery.
The method of claim 4, wherein the resource information comprises at least one of the following:

Resource configuration valid value, resource pool information, network temporary identifier, D2D semi-persistent scheduling interval, D2D semi-persistent scheduling frame offset, D2D semi-persistent scheduling subframe offset.
The method of claim 6, wherein the resource pool information comprises at least one of the following:

The sending resource pool discovered by D2D, the receiving resource pool discovered by D2D, the sending resource pool of D2D communication, and the receiving resource pool of D2D communication.
The method of claim 6, wherein the network temporary identification comprises at least one of the following:

D2D air network temporary identification, D2D semi-continuous air network temporary identification.
The method of claim 3, wherein the D2D service type information comprises at least one of the following:

D2D discovery, D2D communication.
The method of claim 3, wherein

The D2D discovery includes: transmission of D2D discovery and acceptance of /D2D discovery;

The D2D communication includes: transmission of the D2D communication and/or acceptance of the D2D communication.
A device-to-device D2D service switching implementation method includes:

The target base station receives the D2D service switching request message from the source base station;

The target base station allocates first configuration information to the terminal according to the D2D service switching request message, where the first configuration message is configuration information required for the terminal to perform D2D service;

The target base station sends the first configuration information to the source base station.
The method according to claim 1, wherein the target base station allocates first configuration information to the terminal according to the D2D service switching request message, including one of the following:

The target base station directly allocates the first configuration information to the terminal, where the D2D service switching request message is triggered, and the first configuration message is configuration information required for the terminal to perform D2D service;

The target base station acquires second configuration information from the D2D service switching request message, where the second configuration information is information configured by the source base station to perform D2D service for the terminal; The second configuration information determines the first configuration information allocated for the terminal.
The method of claim 12, wherein the first configuration information and/or the second configuration information comprises at least: D2D service type information.
The method of claim 13, wherein the first configuration information and/or the second configuration information further comprises at least one of the following:

Resource allocation mode, resource information, D2D group information.
A device-to-device D2D service switching implementation device is applied to a source base station, including:

The first sending module is configured to send a D2D service switching request message to the target base station;

a receiving module, configured to receive first configuration information that is configured by the target base station according to the service switching request message, where the first configuration message is configuration information required for the terminal to perform D2D service;

The second sending module is configured to send the first configuration information to the terminal.
The apparatus according to claim 15, wherein the first sending module is further configured to send the handover request message carrying the following information: the source base station is configured to perform second configuration configured by the terminal for D2D service The second configuration information is used by the target base station to determine the first configuration information providing basis.
A device-to-device D2D service switching implementation device is applied to a target base station, including:

a receiving module, configured to receive a D2D service switching request message from a source base station;

The allocating module is configured to allocate first configuration information to the terminal according to the D2D service switching request message, where the first configuration message is configuration information required for the terminal to perform D2D service;

And a sending module, configured to send the first configuration information to the source base station.
The apparatus of claim 17 wherein said assigning module comprises:

The allocating unit is configured to allocate the first configuration information to the terminal directly under the trigger of the D2D service switching request message, where the first configuration message is configuration information required for the terminal to perform D2D service; or

An obtaining unit, configured to obtain second configuration information from the D2D service switching request message, where the second configuration information is information configured by the source base station to perform D2D service for the terminal, and the determining unit is configured to The second configuration information determines the first configuration information that is allocated by the terminal.