CN104113833A - Device to device (D2D) configuration method, D2D configuration device and D2D configuration system - Google Patents

Abstract

The present invention discloses a D2D configuration method, device and system: when a base station receives a capability report of a terminal in the process of attaching or tracking area update, the reported information whether it supports D2D communication; if it is determined that the terminal supports D2D communication, the base station will The terminal performs D2D configuration. By applying the scheme of the present invention, signaling overhead can be saved.

Description

Device-to-device D2D configuration method, device and system

technical field

The present invention relates to wireless technology, in particular to a device-to-device (D2D, Device to Device) configuration method, device and system.

Background technique

D2D communication refers to direct communication between terminals without infrastructure.

The traditional cellular network does not support D2D technology, and the communication between terminals must be transmitted through the base station. After the introduction of D2D technology in the cellular network, it will be able to make the terminals in close range discover each other and directly transmit data, thus saving the air interface. and core network resources and provide new services, such as fighting games, short-range broadcasting, and certain machine-to-machine (M2M, Machine to Machine) communications.

The inventor of the present application believes that in practical applications, not all terminals support D2D technology, that is, support D2D communication. All D2D communication terminals are configured with D2D, which causes unnecessary signaling overhead.

Contents of the invention

In view of this, the present invention provides a D2D configuration method, device and system, which can save signaling overhead.

In order to achieve the above object, technical solution of the present invention is achieved in that way:

A D2D configuration method, comprising:

The first base station receives information about whether the terminal supports D2D communication when reporting capabilities during the process of attaching or tracking area update;

If it is determined that the terminal supports D2D communication, the first base station performs D2D configuration for the terminal.

A terminal comprising:

The reporting module is used to report whether the terminal supports D2D communication when reporting the capability to the base station during the process of attaching or updating the tracking area.

A base station, comprising:

The receiving module is used to receive the information of whether the terminal supports D2D communication when reporting the capability during the process of attaching or updating the tracking area, and send it to the configuration module;

The configuration module is configured to perform D2D configuration only for terminals supporting D2D communication.

A D2D configuration system, comprising:

The terminal is used to report whether it supports D2D communication when reporting capabilities to the base station during the attachment or tracking area update process;

The base station is used to receive information about whether it supports D2D communication when the terminal reports its capability, and to perform D2D configuration for the terminal supporting D2D communication.

It can be seen that by using the solution of the present invention, the terminal can report whether it supports D2D communication when reporting the capability. In this way, the network side can perform D2D configuration for the terminal supporting D2D communication, thereby saving signaling overhead.

Description of drawings

FIG. 1 is a flowchart of an embodiment of a D2D configuration method in the present invention.

Fig. 2 is a flow chart of a preferred embodiment of the D2D configuration method of the present invention.

Detailed ways

Aiming at the problems existing in the prior art, a D2D configuration scheme is proposed in the present invention, which can save signaling overhead.

In order to make the technical solution of the present invention more clear and understandable, the solution of the present invention will be further described in detail below with reference to the accompanying drawings and examples.

FIG. 1 is a flowchart of an embodiment of a D2D configuration method in the present invention. As shown in Figure 1, including:

Step 11: The first base station receives information about whether it supports D2D communication reported by the terminal when it reports capabilities during the process of attaching or tracking area update.

Usually, when the terminal attaches (Attach) or performs Tracking Area Updating (TAU, Tracking Area Updating), it will report the capability to the network side.

In this step, when reporting the capability, the terminal needs to report whether it supports D2D communication in addition to the information required to be reported in the prior art.

For the 3GPP Long Term Evolution (LTE, Long Term Evolution) system, the information element (IE, Information Element) terminal capability (UE-EUTRA-Capability) in the capability reporting signaling can be extended, such as adding a bit (bit), It is used to indicate whether the terminal supports D2D communication. If the value of this bit is 0, it means it does not support it, and if it is 1, it means it supports it; or, if there is a reserved bit in IE UE-EUTRA-Capability, you can also use it A reserved bit to indicate whether the terminal supports D2D communication.

In addition, for a terminal supporting D2D communication, while reporting whether it supports D2D communication, it can further report one of the following information: only receive D2D information, only send D2D information, both receive D2D information and send D2D information. Which one can be determined according to the actual situation.

Correspondingly, two bits can be added in IE UE-EUTRA-Capability, or two reserved bits in IEUE-EUTRA-Capability can be used to indicate relevant information of the terminal, such as when the two bits are selected When the value is 00 or empty, it means that the terminal does not support D2D communication. When the value is 01, it means that the terminal supports D2D communication and only receives D2D information. When the value is 10, it means that the terminal supports D2D communication and only sends D2D information. The value is 11 indicates that the terminal supports D2D communication and both receives D2D information and sends D2D information.

Step 12: If it is determined that the terminal supports D2D communication, the first base station performs D2D configuration for the terminal.

Generally, when a terminal enters an area supporting D2D communication, D2D configuration needs to be performed for it.

Specifically, for any terminal, if it supports D2D communication, then the first base station to which it belongs can perform D2D configuration for the terminal in combination with its own situation and the information reported by the terminal, and send D2D configuration information to the terminal. It is an existing technology how to perform D2D configuration carrying the resource size, location and period of the D2D communication of the cell where the terminal is located.

The D2D configuration information can be carried in the radio resource control connection reconfiguration (RRC Connection Reconfiguration) signaling, and can also be carried in other radio resource control (RRC, Radio Resource Control) signaling sent by the first base station to the terminal.

As mentioned above, as long as the terminal supports D2D communication, the network side will perform D2D configuration for it. In practical applications, the D2D configuration conditions of the terminal can be further limited, that is, only the terminal that supports D2D communication and has started D2D communication D2D configuration is performed, because only terminals that have started D2D communication can perform D2D communication, thereby further saving signaling overhead.

For this reason, for any terminal, if it supports D2D communication and has started D2D communication when reporting its capabilities, it can also report that it has started D2D communication while reporting whether it supports D2D communication in step 11 information; if it supports D2D communication, but does not start D2D communication when reporting capabilities, it will report the information that it has started D2D communication after starting D2D communication.

In addition, the solution of the present invention also proposes that, for any terminal, when it is handed over from the first base station to the second base station, the first base station needs to forward the information reported by the terminal to the second base station, so that the The terminal does not need to report relevant information to the second base station, thereby further saving signaling overhead.

Specifically, the first base station can determine whether there is an X2 interface between itself and the second base station, and if so, forward the information reported by the terminal to the second base station through the X2 interface; otherwise, it can communicate with the mobility management entity ( The S1 interface between MME (Mobility Management Entity) forwards the information reported by the terminal to the MME, and the MME forwards the information reported by the terminal to the second base station through the S1 interface with the second base station. In the LTE system, the information reported by the terminal can be carried in RRC signaling handover preparation information (Handover Preparation Information), and of course, can also be carried in other RRC signaling sent from the first base station to the second base station.

Based on the above introduction, FIG. 2 is a flow chart of a preferred embodiment of the D2D configuration method of the present invention. As shown in Figure 2, including:

Step 21: For any terminal supporting D2D communication, when reporting the capability to the first base station, report the information that it supports D2D communication and the information that only receives D2D information.

It is assumed that the terminal has not started D2D communication at this time.

Step 22: After the terminal starts the D2D communication, it reports the information that it has started the D2D communication to the first base station.

Step 23: The first base station performs D2D configuration for the terminal, and notifies the terminal of the configuration information.

Step 24: When the terminal is handed over from the first base station to the second base station, the first base station forwards the information reported by the terminal that the terminal supports D2D communication, information that only receives D2D information, and information that D2D communication has been started to the second base station .

The solution of the present invention will be further described by way of examples below.

Assuming that a terminal needs to update the tracking area, then in this process, the terminal will report its capability to the first base station and report whether it supports D2D communication; if the terminal supports D2D communication, it can also determine whether it has started For D2D communication, if it is, it can report the information that it has started D2D communication while reporting the information that it supports D2D communication; otherwise, it can wait until the subsequent start of D2D communication before reporting the information that D2D communication has been started; in addition, if The terminal supports D2D communication, and can also report one of the following information according to its own situation while reporting the information that it supports D2D communication and the information that D2D communication has been started: only receive D2D information, only send D2D information, both receive D2D information and Send D2D information; the information reported by the terminal can be carried in the IE UE-EUTRA-Capability in the capability report signaling, specifically, through the extended bits or reserved bits in the IE UE-EUTRA-Capability, to carry the reported information;

After the first base station receives the capability report signaling from the terminal, it can analyze the IEUE-EUTRA-Capability therein, assuming that the terminal supports D2D communication and has started D2D communication according to the analysis result, and only receives D2D information, Then D2D configuration can be performed for the terminal accordingly, and the D2D configuration information can be sent to the terminal through RRC signaling. The D2D configuration information can include: the resource size, location and cycle of D2D communication in the cell where the terminal is located;

Subsequently, assuming that the terminal is handed over from the first base station to the second base station, the first base station may first determine whether there is an X2 interface between itself and the second base station, and if so, forward the information reported by the terminal to the Otherwise, the second base station may forward the information reported by the terminal to the MME through the S1 interface with the MME, and further, the MME forwards the information reported by the terminal to the MME through the S1 interface with the second base station. second base station.

The invention also discloses a D2D configuration system, a terminal and a base station.

The D2D configuration system includes:

The terminal is used to report whether it supports D2D communication when reporting capabilities to the base station during the attachment or tracking area update process;

The base station is used to receive information about whether it supports D2D communication when the terminal reports its capability, and only performs D2D configuration for the terminal supporting D2D communication.

in,

The terminal may be further configured to, if it supports D2D communication, report one of the following information while reporting whether it supports D2D communication: only receive D2D information, only send D2D information, receive both D2D information and send D2D information ;

Correspondingly, the base station may be further configured to receive one of the following information reported by a terminal supporting D2D communication: only receive D2D information, only send D2D information, receive both D2D information and send D2D information; The reported information is used to perform D2D configuration for terminals supporting D2D communication.

in addition,

The terminal can be further used to, if D2D communication is supported, and D2D communication has been started when the capability is reported, then while reporting the information of whether it supports D2D communication, it also reports the information that it has started D2D communication; if it supports D2D communication, but D2D communication is not started when reporting capabilities, then after starting D2D communication, report the information that it has started D2D communication;

Correspondingly, the base station may be further configured to receive information that D2D communication has been initiated reported by terminals that support D2D communication and have initiated D2D communication, and perform D2D configuration only for terminals that support D2D communication and have initiated D2D communication.

also,

The base station may be further configured to, if it is determined that a terminal is switched from itself to a new base station, forward the information reported by the terminal to the new base station.

The terminal includes:

The reporting module is used to report whether the terminal supports D2D communication when reporting the capability to the base station during the process of attaching or updating the tracking area.

in,

The reporting module can be further used to, if the terminal supports D2D communication, report one of the following information while reporting whether the terminal supports D2D communication: the terminal only receives D2D information, the terminal only sends D2D information, the terminal Both receive D2D information and send D2D information.

in addition,

The reporting module can be further used to, if the terminal supports D2D communication, and D2D communication has been started when the capability is reported, then when reporting the information of whether the terminal supports D2D communication, report the information that the terminal has started D2D communication ; If the terminal supports D2D communication, but the D2D communication is not started when the capability is reported, then after the terminal starts the D2D communication, report the information that the terminal has started the D2D communication.

The base station includes:

The receiving module is used to receive the information of whether the terminal supports D2D communication when reporting the capability during the process of attaching or updating the tracking area, and send it to the configuration module;

The configuration module is configured to perform D2D configuration only for terminals supporting D2D communication.

in,

The receiving module can be further used to receive one of the following information reported by a terminal supporting D2D communication: only receive D2D information, only send D2D information, receive both D2D information and send D2D information, and send it to the configuration module;

Correspondingly, the configuration module performs D2D configuration for the terminal supporting D2D communication in combination with the situation of the base station where it is located and the information reported by the terminal.

in addition,

The receiving module can be further used to receive the information that the terminal that supports D2D communication and has started D2D communication reports that it has started D2D communication, and sends it to the configuration module;

Correspondingly, the configuration module can only perform D2D configuration for terminals that support D2D communication and have started D2D communication.

also,

The configuration module may be further configured to forward the information reported by the terminal to the new base station if it is determined that a terminal is handed over from the base station where it is located to a new base station.

specifically,

The configuration module determines whether there is an X2 interface between the base station and the new base station, and if so, forwards the information reported by the terminal to the new base station through the X2 interface; otherwise, forwards the information reported by the terminal to the new base station through the S1 interface with the MME. The reported information is forwarded to the MME, and the MME forwards the information reported by the terminal to the new base station through the S1 interface with the new base station.

Please refer to the corresponding descriptions in the aforementioned method embodiments for the specific working process of the above-mentioned device embodiments, which will not be repeated here.

In short, by adopting the solution of the present invention, the terminal can report whether it supports D2D communication when reporting the capability, so that the network side can only perform D2D configuration for the terminal that supports D2D communication, thereby saving signaling overhead; Moreover, when the terminal switches from one base station to another, there is no need to re-report information such as whether it supports D2D communication, thereby further saving signaling overhead; in addition, the solution of the present invention is simple and convenient to implement, and is easy to popularize and promote.

To sum up, the above are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (18)

1. A device-to-device D2D configuration method, comprising:

the method comprises the steps that when a first base station reports capacity in the process of attaching or updating a tracking area, the first base station receives information whether the terminal supports D2D communication or not;

and if the terminal is determined to support D2D communication, the first base station performs D2D configuration for the terminal.

2. The method of claim 1,

the method further comprises the following steps: if the terminal supports D2D communication, reporting information whether the terminal supports D2D communication, and simultaneously reporting one of the following information: receive only D2D information, transmit only D2D information, receive both D2D and D2D information;

the first base station performing D2D configuration for the terminal includes: and the first base station performs D2D configuration for the terminal by combining the self condition and the information reported by the terminal.

3. The method of claim 1,

the method further comprises the following steps: if the terminal supports D2D communication and starts D2D communication when reporting the capability, reporting the information whether the terminal supports D2D communication and reporting the information that the terminal starts D2D communication; if the terminal supports D2D communication but does not start D2D communication when reporting the capability, reporting the information that the terminal starts D2D communication after starting D2D communication;

if it is determined that the terminal supports D2D communication, the configuring, by the first base station, of the terminal by using D2D includes: if the terminal is determined to support D2D communication and D2D communication is started, the first base station performs D2D configuration for the terminal.

4. The method of claim 1, 2 or 3,

the method further comprises the following steps: and if the first base station determines that the terminal is switched to a second base station, forwarding the information reported by the terminal to the second base station.

5. The method of claim 4, wherein the forwarding, by the first base station, the information reported by the terminal to the second base station comprises:

the first base station determines whether an X2 interface exists between the first base station and the second base station, and if so, the information reported by the terminal is forwarded to the second base station through the X2 interface; otherwise, the information reported by the terminal is forwarded to the mobility management entity MME through an S1 interface with the MME, and the information reported by the terminal is forwarded to the second base station by the MME through an S1 interface with the second base station.

6. The method of claim 1, wherein the capability reporting comprises:

carrying the reported information through the extended bit in the Capability of the information unit IE terminal in the Capability report signaling UE-EUTRA-Capability;

or carrying the reported information through reserved bits in the IE UE-EUTRA-Capability.

7. A terminal, comprising:

and the reporting module is used for reporting the information whether the terminal supports the device-to-device D2D communication when the capability is reported to the base station in the process of updating the attachment or tracking area.

8. The terminal of claim 7,

the reporting module is further configured to, if the terminal supports D2D communication, report information on whether the terminal supports D2D communication, and report one of the following information: the terminal receives only the D2D information, the terminal transmits only the D2D information, and the terminal receives both the D2D and D2D information.

9. The terminal according to claim 7 or 8,

the reporting module is further configured to, if the terminal supports D2D communication and the D2D communication is started when reporting the capability, report information that the terminal has started the D2D communication while reporting information that whether the terminal supports D2D communication; if the terminal supports the D2D communication but does not start the D2D communication when reporting the capability, the terminal reports the information that the terminal starts the D2D communication after starting the D2D communication.

10. A base station, comprising:

the receiving module is used for receiving information whether the reported terminal supports the device-to-device D2D communication when the terminal reports the capability in the process of attaching or updating the tracking area, and sending the information to the configuration module;

the configuration module is used for performing D2D configuration only for the terminal supporting D2D communication.

11. The base station of claim 10,

the receiving module is further configured to receive one of the following information reported by a terminal supporting D2D communication: receiving only D2D information, transmitting only D2D information, receiving both D2D and D2D information, and transmitting to the configuration module;

and the configuration module performs D2D configuration on the terminal supporting D2D communication by combining the condition of the base station and the information reported by the terminal.

12. The base station of claim 10,

the receiving module is further configured to receive information that a terminal supporting D2D communication and having started D2D communication reports that D2D communication has been started, and send the information to the configuration module;

the configuration module performs D2D configuration only for terminals that support D2D communication and have activated D2D communication.

13. The base station of claim 10, 11 or 12,

the configuration module is further configured to forward the information reported by the terminal to a new base station if it is determined that the terminal is switched from the base station to the new base station.

14. The base station of claim 13,

the configuration module determines whether an X2 interface exists between the base station and the new base station, and if so, the information reported by the terminal is forwarded to the new base station through the X2 interface; otherwise, the information reported by the terminal is forwarded to the MME through an S1 interface between the MME and the mobile management entity, and the information reported by the terminal is forwarded to the new base station through an S1 interface between the MME and the new base station.

15. A device-to-device D2D configuration system, comprising:

the terminal is used for reporting the information whether the terminal supports D2D communication or not when reporting the capability to the base station in the process of updating the attachment or tracking area;

and the base station is used for receiving the information whether the terminal supports D2D communication or not when the terminal reports the capability, and performing D2D configuration for the terminal supporting D2D communication.

16. The system of claim 15,

the terminal is further configured to, if the D2D communication is supported, report one of the following information while reporting information whether the terminal supports D2D communication: receive only D2D information, transmit only D2D information, receive both D2D and D2D information;

the base station is further configured to receive one of the following information reported by a terminal supporting D2D communication: receive only D2D information, transmit only D2D information, receive both D2D and D2D information; and D2D configuration is carried out for the terminal supporting D2D communication by combining the self condition and the information reported by the terminal.

17. The system of claim 15,

the terminal is further used for reporting the information of whether the terminal supports D2D communication and reporting the information of the terminal which starts D2D communication when the terminal supports D2D communication and starts D2D communication when reporting the information of whether the terminal supports D2D communication; if the D2D communication is supported, but the D2D communication is not started when the capability reporting is carried out, the information that the D2D communication is started is reported after the D2D communication is started;

the base station is further configured to receive information that the terminal supporting D2D communication and starting D2D communication reports that the terminal has started D2D communication, and perform D2D configuration for the terminal supporting D2D communication and starting D2D communication.

18. The system of claim 15, 16 or 17,

the base station is further configured to forward the information reported by the terminal to a new base station if it is determined that the terminal is handed over from itself to the new base station.