WO2016141636A1 - D2d communication method, system and device - Google Patents

Abstract

Disclosed in the invention are a device to device (D2D) communication method, system and device, for realizing D2D communication when a same group has D2D terminals of different cells, so as to satisfy an existing half-duplex communication constraint. The method comprises: acquiring, by a current D2D terminal, group information of a D2D terminal in an adjacent cell, wherein the current D2D terminal and the D2D terminal in the adjacent cell belong to a same group within a preset range, the group information at least comprising a group identifier of the group containing the D2D terminal in the adjacent cell; transmitting, by the current D2D terminal, the group information to a service base station so as to enable the base station to determine a scheduling policy according to the group information; when the current D2D terminal transmits data, scheduling, according to the scheduling policy, the current D2D terminal to transmit data, and according to the scheduling policy, when the current D2D terminal transmits data, the D2D terminal in the adjacent cell in the same group does not transmit data.

Description

Method, system and device for realizing D2D communication

This application claims priority to Chinese Patent Application No. 201510110158.9, entitled "A Method, System and Apparatus for Implementing D2D Communication" on March 12, 2015, the entire contents of which are incorporated by reference. In this application.

Technical field

The present invention relates to the field of wireless communication technologies, and in particular, to a method, system, and device for implementing device to device (D2D) communication.

Background technique

D2D communication is a communication technology introduced in the 3rd Generation Partnership Project (3GPP). In the Long Term Evolution (LTE) network architecture, it allows two closely spaced cells in a cellular network. The terminals communicate directly with each other through specific channels to improve spectrum utilization and network capacity. The D2D communication uses the same resources as the cell terminal, and the terminal performing D2D communication is also allocated by the cell base station under the control of the cell base station, the D2D communication resource is allocated by the cell base station, and the transmission power of the D2D communication is controlled to ensure the D2D communication to the cell. The interference caused by communication is within an acceptable range.

The D2D communication technical specification defines that terminals of the same group within a preset range can only transmit data by one terminal at a time, and receiving data is not limited. In the above D2D communication technical specification, if the terminals in the same group belong to the same cell, the cell base station can conveniently control that only one terminal transmits data in the same time. If the terminals in the same group belong to different cells, the cell base station only knows the communication situation of the own cell, and does not know the communication situation of other cells, it may happen that multiple terminals in the same group simultaneously send data. At present, there is no solution to solve this problem under the premise of meeting the above D2D communication technical specifications.

Summary of the invention

Embodiments of the present invention provide a D2D communication method, system, and device, which are implemented in the same In the case where a group has different cell D2D terminals, D2D communication can satisfy the existing half-duplex communication constraint, avoid data reception failure, and improve the reliability of data transmission in D2D communication.

A first aspect of the present invention provides a method for implementing D2D communication, which is applied to a terminal side, and may include:

The current D2D terminal acquires the group information of the neighboring cell D2D terminal, and the current D2D terminal and the neighboring cell D2D terminal belong to the same group in the preset range, and the group information includes at least the group identifier of the group to which the neighboring cell D2D terminal belongs. ;

The current D2D terminal sends the group information to the serving base station, so that the serving base station determines a scheduling policy according to the group information, and when the current D2D terminal sends data, schedules the current D2D terminal to send data according to the scheduling policy, and according to the scheduling policy, The foregoing scheduling policy does not transmit data in the neighboring cell D2D terminal in the same group when the current D2D terminal transmits data.

A second aspect of the present invention provides a method for implementing D2D communication, which is applied to a base station side, and may include:

The serving base station receives the group information of the neighboring cell D2D terminal that is sent by the current D2D terminal, and the current D2D terminal and the neighboring cell D2D terminal belong to the same group in the preset range, and the group information includes at least the group of the neighboring cell D2D terminal. Group ID of the group;

The serving base station determines a scheduling policy according to the foregoing group information;

When the current D2D terminal sends data, the serving base station schedules the current D2D terminal to send data according to the scheduling policy, and according to the scheduling policy, when the current D2D terminal sends data, the neighboring cell D2D terminal in the same group does not send data. .

A third aspect of the present invention provides an information acquiring method, which may include:

The device-to-device D2D terminal acquires group information of the group to which the group belongs, and the group information includes at least the group identifier of the group;

The D2D terminal writes the group information to the D2D discovery message, where the D2D discovery message includes the group information;

The D2D terminal broadcasts the D2D discovery message in a preset range.

A fourth aspect of the present invention provides an information acquiring method, which may include:

The device-to-device D2D terminal monitors a D2D discovery message broadcast by another D2D terminal in a preset range, where the D2D discovery message includes group information, and the group information includes at least the other D2Ds. The group ID of the group to which the terminal belongs;

The D2D terminal acquires the group information from the D2D discovery message.

A fifth aspect of the present invention provides a D2D terminal, which may include:

a first acquiring module, configured to acquire group information of a neighboring cell D2D terminal in a same group in a preset range, where the group information includes at least a group identifier of a group to which the neighboring cell D2D terminal belongs;

The first sending module is configured to send the group information to the serving base station, so that the serving base station determines a scheduling policy according to the group information, and when the current D2D terminal sends data, schedules the current D2D terminal to send data according to the scheduling policy. And, according to the foregoing scheduling policy, when the current D2D terminal sends data, the neighboring cell D2D terminal does not send data.

A sixth aspect of the present invention provides a D2D terminal, which may include:

a third obtaining module, configured to acquire group information of a group, where the group information includes at least a group identifier of the group;

a third writing module, configured to write the group information to the D2D discovery message, where the D2D discovery message includes the group information;

And a third broadcast module, configured to broadcast the foregoing D2D discovery message within a preset range.

A seventh aspect of the present invention provides a D2D terminal, which may include:

a fourth monitoring module, configured to monitor a D2D discovery message broadcast by another D2D terminal in a preset range, where the D2D discovery message includes group information, where the group information includes at least a group identifier of a group to which the other D2D terminal belongs;

The fourth obtaining module acquires the group information from the D2D discovery message that is monitored by the message listening module.

An eighth aspect of the present invention provides a base station, which may include:

The fifth receiving module is configured to receive the group information of the neighboring cell D2D terminal that is sent by the current D2D terminal, where the current D2D terminal and the neighboring cell D2D terminal belong to the same group in the preset range, and the group information includes at least the foregoing neighboring group. a group identifier of a group to which the cell D2D terminal belongs;

a fifth determining module, configured to determine a scheduling policy according to the foregoing group information;

The scheduling module is configured to: when the current D2D terminal sends data, schedule the current D2D terminal to send data according to the scheduling policy, and when the current D2D terminal sends data according to the scheduling policy, the neighboring cell D2D terminal does not send data.

A ninth aspect of the present invention provides a system for implementing D2D communication, which may include: the D2D terminal provided in the foregoing fifth aspect, and the base station provided in the foregoing eighth aspect.

It can be seen from the foregoing technical solution that, in the method for implementing device-to-device D2D communication provided by the embodiment of the present invention, the current D2D terminal acquires group information of the neighboring cell terminal in the same group, and the group information includes the neighboring cell. The group identifier of the group to which the D2D terminal belongs, and then the D2D terminal sends the group information to the serving base station. Since the group information includes the group identifier of the group to which the neighboring cell D2D terminal belongs, the serving base station can determine a scheduling policy for the current D2D terminal and the neighboring cell D2D terminal that belong to different cells in the same group according to the group information. Further, when the current D2D terminal sends data, it can control that the neighboring cell D2D terminal does not simultaneously transmit data, and satisfies the existing half-duplex constraint, so that only one D2D terminal sends data in the same group in the same group at the same time. To avoid data reception failure and improve the reliability of data transmission.

DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments of the present invention will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without paying any creative work.

FIG. 1 is a schematic structural diagram of an LTE network according to an embodiment of the present disclosure;

2 is a schematic flowchart of a method for implementing D2D communication according to an embodiment of the present invention;

3 is a schematic flowchart of a method for implementing D2D communication according to another embodiment of the present invention;

4 is a schematic flowchart of a method for implementing D2D communication according to another embodiment of the present invention;

FIG. 5 is a schematic flowchart of a method for implementing D2D communication according to another embodiment of the present invention;

FIG. 6 is a schematic flowchart diagram of a method for implementing D2D communication according to another embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a D2D terminal according to an embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram of a D2D terminal according to another embodiment of the present invention; FIG.

FIG. 8b is a schematic structural diagram of a D2D terminal according to another embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a base station according to an embodiment of the present disclosure;

FIG. 10 is a schematic structural diagram of a system for implementing D2D communication according to an embodiment of the present invention.

detailed description

An embodiment of the present invention provides a method for implementing D2D communication, which is implemented in a D2D terminal scenario in which different cells exist in the same group in a preset range under a Long Term Evolution (LTE) network architecture. A group sends data only by one D2D terminal at the same time, satisfies the existing half-duplex communication constraint, avoids data reception failure, and improves the reliability of data transmission in D2D communication. The embodiment of the present invention further provides a system for implementing D2D communication, and a D2D terminal and a base station.

In order to make the object, the features and the advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. The described embodiments are only a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

The terms "first", "second", "third", "fourth", "fifth" and the like in the specification and claims of the present invention and the above drawings are used to distinguish different objects instead of Used to describe a specific order. Moreover, the terms "comprising" and "having" and any variants thereof are intended to cover a non-exclusive inclusion. For example, a process, method, system, product, or device that comprises a series of steps or modules is not limited to the steps or modules listed, but may include steps or modules not listed.

The details are described below separately.

An example of some possible application scenarios involved in the technical solution of the embodiment of the present invention is described in conjunction with FIG. 1 . FIG. 1 is a schematic structural diagram of an LTE network according to an embodiment of the present invention.

As shown in the example of FIG. 1 , the LTE network architecture includes: a plurality of evolved Node Bs (eNBs) in the Core Network (CN), and eNB1 and eNB2 are used as an example in FIG. The group B includes three user terminals (User Equipment, UE for short), which are respectively UE1, UE2, and UE3. The UE1 works under the cell A1 covered by the eNB1, and the UE2 and the UE3 work in the cell A2 covered by the eNB2. Both UE2 and UE3 have D2D communication capabilities. Therefore, UE1, UE2, and UE3 are all D2D terminals referred to in the present invention.

It should be noted that the preset range provided by the present invention is generally divided according to the transmit power and the receive capability of the D2D terminal, and the group refers to the work group divided according to the service/user subscription.

In the following, based on the architecture shown in FIG. 1, the inventors of the present invention may analyze the possible formation of presets. Different UEs in the same group transmit data at the same time, and the data reception failure caused by the existing half-duplex communication is not satisfied.

Since the UE1 is in the cell A1 covered by the eNB1, and the UE2 and the UE3 are in the cell A2 covered by the eNB2, the eNB only knows the communication situation of the UE in the cell under the coverage. Therefore, the eNB1 only knows the communication condition of the UE1, and the eNB2 only knows the UE2. Communication with UE3. eNB2 can only control that UE2 and UE3 are not transmitting data at the same time, but when any one of UE2 and UE3 is transmitting data, UE1 may also transmit data.

However, for D2D communication, the network side allocates different time-frequency resource blocks for different groups, and the UEs in the group can perform D2D communication by using the allocated time-frequency resource blocks. Since one UE in the group uses the time-frequency resource block in the same time, the other UE cannot use the time-frequency resource block in the time period, otherwise the receiver fails to receive the data. However, the foregoing eNB1 and eNB2 may simultaneously schedule the UE to perform data transmission, causing different UEs to simultaneously transmit data, thereby causing data reception failure.

The technical solution of the embodiment of the present invention focuses on how to avoid the possibility of being sent by different D2D terminals by different base stations in the scenario where D2D terminals of different cells exist in some groups in a preset range. Different D2D terminals transmit data to meet the existing half-duplex communication constraints, thereby improving the reliability of data transmission in D2D communication.

In addition, the present invention provides an enhanced D2D terminal discovery mechanism, that is, adding a group information field in a D2D discovery message of a D2D terminal, so that the D2D terminal can obtain a preset range through an enhanced D2D terminal discovery mechanism when necessary. Group information of other D2D terminals.

The following briefly introduces how the scheme obtains group information through an enhanced D2D terminal discovery mechanism.

In some embodiments of the present invention, an information acquisition method includes: a device-to-device D2D terminal acquires group information of a group to which the group belongs, the group information includes at least a group identifier of the group; and the D2D terminal writes the group information to the D2D. The discovery message, the D2D discovery message includes the group information, and the D2D terminal broadcasts the D2D discovery message.

The D2D terminal writes the group information of the respective group into the D2D discovery message, and then broadcasts the D2D discovery message, so that the other D2D terminal can determine not only the D2D terminal but also the group information according to the D2D discovery message. The group to which it belongs is determined based on the group information.

In some embodiments of the present invention, an information acquisition method includes: a device-to-device D2D terminal listening to a D2D discovery message broadcast by another D2D terminal, where the D2D discovery message includes group information, and the group information includes at least the other D2D terminal. The group identifier of the group; the D2D terminal acquires the group information from the D2D discovery message.

The D2D terminal can monitor the group information in the message according to the D2D by monitoring the D2D discovery message broadcast by other D2D terminals in the preset range.

Based on the above description, an embodiment of the method for implementing the D2D communication of the present invention may include: the current D2D terminal acquires group information of the neighboring cell D2D terminal, where the current D2D terminal and the neighboring cell D2D terminal belong to the same group within the preset range. a group, the group information includes at least the group identifier of the group to which the neighboring cell D2D terminal belongs; the current D2D terminal sends the group information to the serving base station, so that the serving base station determines a scheduling policy according to the group information, and is in the current When the data is transmitted by the D2D terminal, the current D2D terminal sends data according to the scheduling policy, and the neighboring cell D2D terminal does not send data when the current D2D terminal sends data according to the scheduling policy.

Referring to FIG. 2, FIG. 2 is a schematic flowchart of a method for implementing D2D communication according to an embodiment of the present invention. A method for implementing D2D communication provided by an embodiment of the present invention may include the following content:

201. The current D2D terminal acquires the group information of the neighboring cell D2D terminal, where the current D2D terminal and the neighboring cell D2D terminal belong to the same group in the preset range, and the group information includes at least the group to which the neighboring cell D2D terminal belongs. Group identification

In some embodiments of the present invention, by adding the enhanced D2D terminal discovery mechanism provided above, that is, adding a group information field in the D2D discovery message of the D2D, the D2D terminal can be made to acquire the preamble through the enhanced D2D terminal discovery mechanism when necessary. Set the group information of the neighboring cell D2D terminals in the same group within the range.

In other embodiments of the present invention, the network side performs group time-frequency resource configuration on the group in advance, that is, configures different time-frequency resources for different groups, and then sets the group information of the D2D terminal to the group in which it is located. The frequency resource has a mapping relationship.

Therefore, in some embodiments of the present invention, the current D2D terminal may acquire group information from a D2D discovery message of the neighboring cell D2D terminal; or acquire group information according to the time-frequency resource of the group. of course, In the embodiment of the present invention, the group information may be indicated to the D2D terminal in other manners. Accordingly, the current D2D terminal may acquire the group information in a corresponding manner.

The foregoing D2D terminal acquires the group information of the D2D terminal of the neighboring cell, and may include: the current D2D terminal monitors the first D2D discovery message sent by another D2D terminal in the preset range, where the first D2D discovery message includes group information; The current D2D terminal obtains the group information from the first D2D discovery message, and determines the neighboring cell D2D terminal from the other D2D terminals according to the cell identifier included in the group information; the current D2D terminal is from the neighboring cell D2D terminal. The first D2D discovery message acquires group information.

The method of adding the group information to the D2D discovery message is suitable for a group with a large number of groups, and is a scene of a dynamic group. If the current D2D terminal has already performed D2D discovery for a period of time before data transmission, there is no need for data transmission. Trigger D2D discovery again to prevent D2D discovery messages from being triggered frequently.

The current D2D terminal acquires the group information of the neighboring cell D2D terminal, and the method further includes: the current D2D terminal listening to the second D2D discovery message sent by the other D2D terminal in the preset range, and according to the cell time frequency corresponding to the other D2D terminal. a resource, the neighboring cell D2D terminal is determined from the other D2D terminals; the current D2D terminal acquires the group time-frequency resource of the second D2D discovery message sent by the neighboring cell D2D terminal, and acquires the neighboring cell according to the group time-frequency resource. The group information of the D2D terminal has a mapping relationship between the group time-frequency resource and the group information of the neighboring cell D2D terminal.

Different from the group information added in the D2D discovery message, when the group is relatively small and the group is relatively static, the network side may indicate the group information by configuring different time-frequency resources for different groups. The D2D terminals of a specific group are made to use different time-frequency resources.

It can be understood that, in some embodiments of the present invention, the current D2D terminal can determine the neighboring cell D2D terminal, and then send the neighboring cell D2D terminal to the serving base station, or the current D2D terminal can also monitor the preset range. The group information of all other D2D terminals is directly sent to the serving base station, and the serving base station determines the neighboring cell D2D terminal.

202. The current D2D terminal sends the group information to the serving base station, so that the serving base station determines a scheduling policy according to the group information, and when the current D2D terminal sends data, schedules the current D2D terminal to send data according to the scheduling policy. And according to the above scheduling strategy, When the current D2D terminal transmits data, the neighboring cell D2D terminal in the same group does not transmit data.

The current D2D terminal will acquire the group information of the neighboring cell terminal in the same group. The group information includes the group identifier of the group to which the neighboring cell D2D terminal belongs, and then the D2D terminal sends the group information to the serving base station. Since the group information includes the group identifier of the group to which the neighboring cell D2D terminal belongs, the serving base station can determine a scheduling policy for the current D2D terminal and the neighboring cell D2D terminal that belong to different cells in the same group according to the group information. Further, when the current D2D terminal sends data, it can control that the neighboring cell D2D terminal does not simultaneously transmit data, and satisfies the existing half-duplex constraint, so that the same group in the preset range transmits data only by one D2D terminal at the same time. Avoid data reception failure and improve the reliability of data transmission.

In some embodiments of the present invention, the sending, by the current D2D terminal, the group information to the serving base station may include: the current D2D terminal writing the group information to a preset first Radio Resource Control (RRC) And signaling, the first RRC signaling that is sent to the foregoing group information is sent to the serving base station; or the current D2D terminal generates the customized second RRC signaling, and the foregoing group information is written into the second RRC signaling, And transmitting, to the serving base station, the second RRC signaling that is written into the group information.

The group information may be directly sent by using the existing RRC signaling, that is, the group information is written into the RRC signaling. Of course, a customized RRC signaling may be separately generated for the sending group information, and then the group information is written. It is sent to the new RRC signaling for transmission.

It can be understood that the RRC signaling has better scalability. At the same time, since the scheme of the present invention does not need to perform the determination of the scheduling policy every time the D2D terminal sends data, the delay of the RRC signaling may be Meet the needs of this type of processing. In the embodiment of the present invention, RRC signaling is preferred to transmit group information, but it is not excluded that MAC signaling may also be used to send group information.

Another embodiment of the method for implementing the D2D communication of the present invention may include: the serving base station receives the group information of the neighboring cell D2D terminal that is sent by the current D2D terminal, where the current D2D terminal and the neighboring cell D2D terminal belong to the same one in the preset range. a group, the group information includes at least a group identifier of a group to which the neighboring cell D2D terminal belongs; the serving base station determines a scheduling policy according to the group information, and when the current D2D terminal sends data, the serving base station schedules the current according to the scheduling policy. The D2D terminal sends data, and according to the foregoing scheduling policy, the neighboring cell D2D terminal in the same group does not send data when the current D2D terminal sends data.

Referring to FIG. 3, FIG. 3 is a schematic flowchart of a method for implementing D2D communication according to another embodiment of the present invention. A method for implementing D2D communication provided by an embodiment of the present invention may include the following content:

301. The serving base station receives the group information of the neighboring cell D2D terminal that is sent by the current D2D terminal, where the current D2D terminal and the neighboring cell D2D terminal belong to the same group in the preset range, and the group information includes at least the neighboring cell D2D terminal. Group ID of the group;

302. The serving base station sends the group information to the serving base station corresponding to the neighboring cell D2D terminal, and negotiates a scheduling policy with the serving base station corresponding to the neighboring cell D2D terminal according to the group information.

After receiving the group information of the neighboring cell D2D terminal from the current D2D terminal, the serving base station then sends the group information to the serving base station of the neighboring cell D2D terminal, and the serving base station of the neighboring cell D2D terminal according to the belonging group included in the group information. Group ID to know which group it is in. Then, the serving base station negotiates a scheduling policy with the serving base station corresponding to the neighboring cell D2D terminal, and the scheduling policy is mainly used to prevent different D2D terminals from transmitting data at the same time.

It can be understood that, because the network side configures different time-frequency resources for different groups, the D2D terminal in the group can use the time-frequency resource to perform D2D communication, and therefore, the scheduling policy is specifically using time-frequency resources. The time domain is staggered to avoid collision between the current D2D communication and the neighboring cell D2D communication in the time domain.

For example, the UE1 in the base station A, the UE2 in the base station B, the UE3 in the base station C, the UE1, the UE2, and the UE3 belong to the same group, and the UE1 obtains the group information of the UE2 and the UE3, and then sends the information to the base station. A, the base station A sends the group information of the UE2 to the base station B, and the base station A sends the group information of the UE3 to the base station C. Further, the base station A and the base station B negotiate a scheduling policy A, and the scheduling policy A is used to control the When UE1 transmits data, UE2 does not transmit data, and vice versa. At the same time, the scheduling policy B is negotiated between the base station A and the base station C, and the scheduling policy B is used to control that the UE3 does not send data when the UE1 transmits data, and vice versa. At this time, it should be noted that between the scheduling policy A and the scheduling, it is necessary to satisfy that any two of UE1, UE2, and UE3 do not simultaneously transmit data.

In some embodiments of the present invention, the foregoing sending the group information to the serving base station corresponding to the neighboring cell D2D terminal includes: sending the group information to the serving base station corresponding to the neighboring cell D2D terminal by using an X2 interface message.

303. When the current D2D terminal sends data, the serving base station schedules the current D2D terminal to send data according to the scheduling policy, and the neighboring cell D2D terminal does not send data when the current D2D terminal sends data according to the scheduling policy.

In the above embodiment, the serving base station sends the group information of the neighboring cell D2D terminal to its corresponding serving base station, and then negotiates a scheduling policy, so that only one D2D terminal transmits data at the same time in the same group.

In another embodiment, as shown in FIG. 4, a method for implementing D2D communication may include:

401. The serving base station receives the group information of the neighboring cell D2D terminal that is sent by the current D2D terminal, where the current D2D terminal and the neighboring cell D2D terminal belong to the same group in the preset range, and the group information includes at least the neighboring cell D2D terminal. The group ID of the group to which it belongs;

The service base station sends the group information to the network side entity, so that the network side entity determines the scheduling policy according to the group information.

The network side entity may be a ProSe Function, a Mobility Management Entity (MME), or the like, and is not limited herein.

In some embodiments of the present invention, the sending the group information to the network side entity includes: sending the group information to the network side entity by using an S1 message.

403. When the current D2D terminal sends data, the serving base station schedules the current D2D terminal to send data according to the scheduling policy, and the neighboring cell D2D terminal does not send data when the current D2D terminal sends data according to the scheduling policy.

In the foregoing embodiment, the scheduling policy is determined by the network side entity, and the unified management is performed, which is suitable for more groups, and the scenes of the D2D terminals having more different cells in the group.

In order to facilitate a better understanding and implementation of the foregoing solutions of the embodiments of the present invention, the following describes some specific application scenarios.

The following describes the method corresponding to FIG. 2 and FIG. 3 in the LTE network architecture shown in FIG. 1 as an example.

Referring to FIG. 5, FIG. 5 is a schematic flowchart diagram of another method for implementing D2D communication according to another embodiment of the present invention. Another method for implementing D2D communication provided by another embodiment of the present invention may include the following content:

501. UE1 acquires group information of UE2 and UE3.

The group information of the UE2 includes the group identifier of the group B. Similarly, the group information of the UE3 includes the group identifier of the group B.

502, UE1 sends the group information of UE2 and UE3 to eNB1;

503, eNB1 sends the group information of the UE2 and the UE3 to the eNB2 through the X2 interface message;

504. The eNB1 negotiates a scheduling policy with the eNB2 according to the group information of the UE2 and the UE3.

After the eNB1 sends the group information of the UE2 and the UE3 to the eNB2, the eNB1 and the eNB2 negotiate, and the negotiated scheduling policy specifically prevents the UE2 and the UE3 from transmitting data when the UE1 transmits data, or any one of the UE2 and the UE3. When transmitting data, UE1 does not transmit data. UE2 and UE3 can be directly controlled by eNB2 so that they do not transmit data in the same time.

505. When the UE1 sends data, the eNB1 schedules the UE1 to send data according to the scheduling policy, and at this time, neither UE2 nor UE3 transmits data.

Referring to FIG. 6, FIG. 6 is a schematic flowchart diagram of another method for implementing D2D communication according to another embodiment of the present invention. Another method for implementing D2D communication provided by another embodiment of the present invention may include the following content:

601. UE1 acquires group information of UE2 and UE3, and UE2 acquires group information of UE1, and UE3 acquires group information of UE1.

The group information of the UE2 includes the group identifier of the group B. Similarly, the group information of the UE3 includes the group identifier of the group B, and the group information of the UE1 includes the group identifier of the group B.

602, UE1 transmits the group information of UE2 and UE3 to eNB1, UE2 transmits the group information of UE1 to eNB2, and UE3 transmits the group information of UE1 to eNB2;

603, eNB1 sends the group information of the UE2 and the UE3 to the MME, and the eNB2 sends the group information of the UE1 to the MME;

604. The MME determines a scheduling policy according to the group information of the UE1, the UE2, and the UE3.

After the UE1 sends the group information of the UE2 and the UE3 to the MME, the MME determines the scheduling policy, specifically, how to prevent the UE2 and the UE3 from transmitting data when the UE1 transmits data, or when the UE2 and the UE3 transmit data, UE1 Do not send data. UE2 and UE3 can be directly controlled by eNB2 so that they do not transmit data in the same time.

605. When the UE1 sends data, the eNB1 schedules the UE1 to send data according to the scheduling policy. Similarly, the UE2 or the UE3 sends data, and the eNB1 schedules the UE2 or the UE3 to send data according to the scheduling policy.

In the foregoing embodiment, the eNB sends the group information to the network side entity MME, and the MME uniformly determines a scheduling policy according to the group information, and then sends the scheduling policy to the eNB, and the eNB may schedule the UE to send data according to the scheduling policy. .

Referring to FIG. 7, FIG. 7 is a schematic structural diagram of a D2D terminal according to an embodiment of the present invention; as shown in FIG. 7, a D2D terminal 700 may include:

The first obtaining module 710 is configured to acquire group information of the neighboring cell D2D terminal in the same group in the preset range, where the group information includes at least the group identifier of the group to which the neighboring cell D2D terminal belongs;

The first sending module 720 is configured to send the group information to the serving base station, so that the serving base station determines a scheduling policy according to the group information, and schedules, when the current D2D terminal sends data, the current D2D terminal to send according to the scheduling policy. Data, and according to the foregoing scheduling policy, when the current D2D terminal sends data, the neighboring cell D2D terminal in the same group does not send data.

In some possible embodiments of the present invention, the foregoing group information further includes a cell identifier of a cell to which the neighboring cell D2D terminal belongs. Therefore, the foregoing first obtaining module 710 specifically includes:

a first monitoring module, configured to monitor a first D2D discovery message sent by another D2D terminal in a preset range, where the first D2D discovery message includes group information;

a first determining module, configured to obtain group information from the first D2D discovery message, and determine a neighboring cell D2D terminal from the other D2D terminals according to the cell identifier included in the group information;

The first information acquiring module is configured to acquire group information from the first D2D discovery message of the neighboring cell D2D terminal.

In other possible embodiments of the present invention, the first obtaining module 710 specifically includes:

a second monitoring module, configured to monitor a second D2D discovery message sent by another D2D terminal in the preset range;

a second determining module, configured to determine a neighboring cell D2D terminal from the other D2D terminals according to the cell time-frequency resources corresponding to the other D2D terminals;

a second information acquiring module, configured to acquire a group time-frequency resource of the second D2D discovery message sent by the neighboring cell D2D terminal, and acquire group information of the neighboring cell D2D terminal according to the group time-frequency resource, where the group time-frequency The resource has a mapping relationship with the group information of the neighboring cell D2D terminal.

Optionally, the foregoing first sending module 720 is specifically configured to write the foregoing group information to the preset first The radio resource controls the RRC signaling, and sends the first RRC signaling that is written to the group information to the serving base station;

Optionally, the foregoing first sending module 720 is specifically configured to generate a customized second RRC signaling, write the group information into the second RRC signaling, and send the second RRC signaling that is sent to the group information. Give the service base station.

Referring to FIG. 8a, FIG. 8a is a schematic structural diagram of a D2D terminal corresponding to an information acquiring method according to an embodiment of the present invention. As shown in FIG. 8a, a D2D terminal includes:

The third obtaining module 810 is configured to acquire group information of the group to which the group belongs, and the group information includes at least a group identifier of the group;

The third writing module 820 is configured to write the group information to the D2D discovery message, where the D2D discovery message includes the group information.

The third broadcast module 830 is configured to broadcast the foregoing D2D discovery message within a preset range.

Referring to FIG. 8b, FIG. 8b is a schematic structural diagram of a D2D terminal corresponding to an information acquiring method according to another embodiment of the present invention. As shown in FIG. 8b, a D2D terminal includes:

The fourth monitoring module 840 is configured to monitor a D2D discovery message broadcast by another D2D terminal in the preset range, where the D2D discovery message includes group information, and the group information includes at least a group identifier of a group to which the other D2D terminal belongs;

The fourth obtaining module 850 acquires the group information from the D2D discovery message that is monitored by the message monitoring module.

Referring to FIG. 9, FIG. 9 is a schematic structural diagram of a base station according to an embodiment of the present invention; as shown in FIG. 8, a base station 900 may include:

The fifth receiving module 910 is configured to receive the group information of the neighboring cell D2D terminal that is sent by the current D2D terminal, where the current D2D terminal and the neighboring cell D2D terminal belong to the same group in the preset range, and the group information includes at least the foregoing a group identifier of a group to which the neighboring cell D2D terminal belongs;

The fifth determining module 920 is configured to determine a scheduling policy according to the group information.

The scheduling module 930 is configured to, when the current D2D terminal sends data, schedule the current D2D terminal to send data according to the scheduling policy, and use the neighboring cell D2D terminal in the same group when the current D2D terminal sends data according to the scheduling policy. Do not send data.

In some possible embodiments of the present invention, the fifth determining module 920 is specifically configured to: The group information is sent to the serving base station corresponding to the neighboring cell D2D terminal, and the scheduling policy is negotiated with the serving base station corresponding to the neighboring cell D2D terminal according to the group information.

In some possible embodiments of the present invention, the fifth determining module 920 is specifically configured to send the group information to a network side entity, so that the network side entity determines a scheduling policy according to the group information.

Preferably, the third sending module is specifically configured to send the group information to the serving base station corresponding to the neighboring cell D2D terminal by using an X2 interface message.

Preferably, the fourth sending module is specifically configured to send the group information to the network side entity by using an S1 message.

Referring to FIG. 10, FIG. 10 is a system for implementing D2D communication according to an embodiment of the present invention, including the D2D terminal 700 shown in FIG. 7 and the base station 900 shown in FIG.

For details, please refer to FIG. 7 for the D2D terminal and FIG. 9 for the introduction of the base station, and details are not described herein again.

In the above embodiments, the descriptions of the various embodiments are different, and the details that are not detailed in a certain embodiment can be referred to the related descriptions of other embodiments.

A person skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the system, the device and the unit described above can refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided by the present application, it should be understood that the disclosed system, apparatus, and method may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in various embodiments of the present invention may be integrated in one processing unit. It is also possible that each unit physically exists alone, or two or more units may be integrated in one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, or all or part of the technical solution, may be embodied in the form of a software product stored in a storage medium. A number of instructions are included to cause a computer device (which may be a personal computer, server, or service base station, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

The method, the system and the device for implementing the D2D communication provided by the present invention are described in detail above. For those skilled in the art, according to the idea of the embodiment of the present invention, the specific implementation manner and the application range may be changed. In the above, the contents of the present specification should not be construed as limiting the present invention.

Claims (21)

1. A method for implementing D2D communication, which is applied to a terminal side, and includes:

   The current D2D terminal acquires the group information of the neighboring cell D2D terminal, where the current D2D terminal and the neighboring cell D2D terminal belong to the same group in the preset range, and the group information includes at least the group to which the neighboring cell D2D terminal belongs. Group ID of the group;

   The current D2D terminal sends the group information to the serving base station, so that the serving base station determines a scheduling policy according to the group information, and when the current D2D terminal sends data, schedules the current according to the scheduling policy. The D2D terminal sends data, and according to the scheduling policy, when the current D2D terminal sends data, the neighboring cell D2D terminal in the same group does not send data.
2. The method of claim 1 wherein

   The group information further includes a cell identifier of a cell to which the neighboring cell D2D terminal belongs, and the group information of the current D2D terminal acquiring the neighboring cell D2D terminal includes:

   The current D2D terminal monitors a first D2D discovery message sent by another D2D terminal in a preset range, where the first D2D discovery message includes group information;

   The current D2D terminal acquires group information from the first D2D discovery message, and determines a neighboring cell D2D terminal from the other D2D terminals according to the cell identifier included in the group information;

   The current D2D terminal acquires group information from a first D2D discovery message of the neighboring cell D2D terminal.
3. The method of claim 1 wherein

   The acquiring, by the current D2D terminal, the group information of the neighboring cell D2D terminal includes:

   The current D2D terminal monitors a second D2D discovery message sent by another D2D terminal in a preset range, and determines a neighboring cell D2D terminal from the other D2D terminals according to the cell time-frequency resource corresponding to the other D2D terminal;

   And acquiring, by the current D2D terminal, the group time-frequency resource of the second D2D discovery message sent by the neighboring cell D2D terminal, and acquiring group information of the neighboring cell D2D terminal according to the group time-frequency resource, where the group The time-frequency resource has a mapping relationship with the group information of the neighboring cell D2D terminal.
4. The method according to any one of claims 1 to 3, characterized in that

   The sending, by the current D2D terminal, the group information to the serving base station includes:

   Writing, by the current D2D terminal, the group information into a preset first radio resource control RRC letter And transmitting, to the serving base station, the first RRC signaling that is written into the group information.
5. The method according to any one of claims 1 to 3, characterized in that

   The sending, by the current D2D terminal, the group information to the serving base station includes:

   The current D2D terminal generates a customized second RRC signaling, writes the group information into the second RRC signaling, and sends a second RRC signaling that writes the group information to the serving base station.
6. A method for implementing D2D communication, which is applied to a base station side, and includes:

   The serving base station receives the group information of the neighboring cell D2D terminal that is sent by the current D2D terminal, where the current D2D terminal and the neighboring cell D2D terminal belong to the same group in the preset range, and the group information includes at least the neighboring cell. The group identifier of the group to which the D2D terminal belongs;

   Determining, by the serving base station, a scheduling policy according to the group information;

   When the current D2D terminal sends data, the serving base station schedules the current D2D terminal to send data according to the scheduling policy, and according to the scheduling policy, when the current D2D terminal sends data, the same group The neighboring cell D2D terminal does not transmit data.
7. The method of claim 6 wherein:

   Determining, by the serving base station, the scheduling policy according to the group information includes:

   The serving base station sends the group information to the serving base station corresponding to the neighboring cell D2D terminal, and negotiates a scheduling policy with the serving base station corresponding to the neighboring cell D2D terminal according to the group information.
8. The method of claim 6 wherein:

   Determining, by the serving base station, the scheduling policy according to the group information includes:

   The serving base station sends the group information to the network side entity, so that the network side entity determines the scheduling policy according to the group information.
9. An information acquisition method, comprising:

   The device-to-device D2D terminal acquires group information of the group to which the group belongs, and the group information includes at least a group identifier of the group;

   Writing, by the D2D terminal, the group information to a D2D discovery message, where the D2D discovery message includes the group information;

   The D2D terminal broadcasts the D2D discovery message.
10. An information acquisition method, comprising:

    The device-to-device D2D terminal listens to D2D discovery messages broadcast by other D2D terminals, the D2D The discovery message includes group information, and the group information includes at least a group identifier of a group to which the other D2D terminal belongs;

    The D2D terminal acquires the group information from the D2D discovery message.
11. A D2D terminal, comprising:

    a first acquiring module, configured to acquire group information of a neighboring cell D2D terminal in a same group in a preset range, where the group information includes at least a group identifier of a group to which the neighboring cell D2D terminal belongs;

    a first sending module, configured to send the group information to the serving base station, so that the serving base station determines a scheduling policy according to the group information, and when the current D2D terminal sends data, according to the scheduling policy scheduling The current D2D terminal sends data, and the neighboring cell D2D terminal does not send data when the current D2D terminal sends data according to the scheduling policy.
12. The D2D terminal of claim 11 wherein:

    The group information further includes a cell identifier of a cell to which the neighboring cell D2D terminal belongs, where the first acquiring module includes:

    a first monitoring module, configured to monitor a first D2D discovery message sent by another D2D terminal in a preset range, where the first D2D discovery message includes group information;

    a first determining module, configured to acquire group information from the first D2D discovery message, and determine a neighboring cell D2D terminal from the other D2D terminals according to the cell identifier included in the group information;

    The first information acquiring module is configured to acquire group information from the first D2D discovery message of the neighboring cell D2D terminal.
13. The D2D terminal of claim 11 wherein:

    The first obtaining module includes:

    a second monitoring module, configured to monitor a second D2D discovery message sent by another D2D terminal in the preset range;

    a second determining module, configured to determine, according to a cell time-frequency resource corresponding to the other D2D terminal, a neighboring cell D2D terminal from the other D2D terminals;

    a second information acquiring module, configured to acquire a group time-frequency resource of the second D2D discovery message sent by the neighboring cell D2D terminal, and acquire group information of the neighboring cell D2D terminal according to the group time-frequency resource, where The group time-frequency resource has a mapping relationship with the group information of the neighboring cell D2D terminal.
14. The D2D terminal according to any one of claims 11 to 13, characterized in that

    The first sending module is specifically configured to write the group information into a preset first radio resource control RRC signaling, and transmitting the first RRC signaling written to the group information to the serving base station.
15. The D2D terminal according to any one of claims 11 to 13, characterized in that

    The first sending module is specifically configured to generate a customized second RRC signaling, write the group information into the second RRC signaling, and send a second RRC signaling that is sent to the group information to Serving base station.
16. A D2D terminal, comprising:

    a third acquiring module, configured to acquire group information of a group, where the group information includes at least a group identifier of the group;

    a third writing module, configured to write the group information to a D2D discovery message, where the D2D discovery message includes the group information;

    And a third broadcast module, configured to broadcast the D2D discovery message.
17. A D2D terminal, comprising:

    a fourth monitoring module, configured to monitor a D2D discovery message broadcast by another D2D terminal, where the D2D discovery message includes group information, where the group information includes at least a group identifier of a group to which the other D2D terminal belongs;

    The fourth obtaining module acquires the group information from the D2D discovery message that is monitored by the message monitoring module.
18. A base station, comprising:

    The fifth receiving module is configured to receive the group information of the neighboring cell D2D terminal that is sent by the current D2D terminal, where the current D2D terminal and the neighboring cell D2D terminal belong to the same group in the preset range, and the group information includes at least a group identifier of a group to which the neighboring cell D2D terminal belongs;

    a fifth determining module, configured to determine a scheduling policy according to the group information;

    a scheduling module, configured to: when the current D2D terminal sends data, schedule the current D2D terminal to send data according to the scheduling policy, and use the neighboring cell D2D terminal when the current D2D terminal sends data according to the scheduling policy. Do not send data.
19. The base station according to claim 18, characterized in that

    The fifth determining module is specifically configured to: send the group information to a serving base station corresponding to the neighboring cell D2D terminal, and negotiate a scheduling policy with the serving base station corresponding to the neighboring cell D2D terminal according to the group information.
20. The base station according to claim 18, characterized in that

    The fifth determining module is specifically configured to send the group information to the network side entity, so that the network side entity determines the scheduling policy according to the group information.
21. A system for realizing D2D communication, comprising the D2D terminal according to any one of claims 11 to 15, and the base station according to any one of claims 18 to 20.

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