CN105165032A

CN105165032A - Method and device for establishing group leader of user group in D2D communication

Info

Publication number: CN105165032A
Application number: CN201480000351.0A
Authority: CN
Inventors: 马洁
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2014-03-21
Filing date: 2014-03-21
Publication date: 2015-12-16
Also published as: WO2015139282A1

Abstract

A method and device for establishing a group leader of a user group in D2D communication is provided. The method comprises the steps that: a base station receives a first request message used for establishing a D2D device as a group leader of a target user group, wherein the first request message carries at least a group identifier of the target user group and a device identifier of the D2D device; the base station determines respectively the target user group and the group leader on the basis of the group identifier and the device identifier in the first request message and allocates to the target user group a group claim channel resource for use by the group leader in transmitting group claim information to group members; and, the base station transmits a first response message used for establishing the D2D device as the group leader of the target user group, wherein the first response message carries at least the group identifier of the target user group and a location identifier of the group claim channel resource. The D2D device is any one D2D device accessing a cellular cell covered by the base station. Per embodiments of the present application, solved is the problem in the prior art that, because group claim channel resources selected by group leaders of different user groups overlap with each other, interference is generated among D2D communications of different user groups.

Description

Method and device for establishing group leader of user group in D2D communication

A kind of method and apparatus technical field for the group head that user's group is set up in D2D communications

The application is related to wireless communication field, the method and apparatus of more particularly to a kind of group head that user's group is set up in D2D communications.

Background technology is in the case where wireless communication coverage is fairly perfect, and operator and government are intended to radio communication and can handle some occurred events of public safety.Gp, after occurred events of public safety generation, one group of public safety personnel（For example, promptly commanding group or rescue team）Between can be communicated in the range of certain region by a kind of distinctive wireless terminal device, this distinctive terminal device is exactly D2D (Device to Device, terminal direct connection）Equipment.D2D equipment can not only as common wireless terminal device with base station carry out cellular communication, while also can all directly with another D2D equipment carry out D2D communications.

Generally, according to actual needs, in the network coverage of a base station, multiple D2D equipment that one group of public safety personnel is held can constitute a user's group（Or user's cluster）And each D2D equipment in the user's group is used as the group member of the user's group, a D2D equipment can be also elected, and the D2D equipment elected is established as to the group head of the user's group, the group head is responsible for coordinating and distributes Radio Resource used in each group member.

During the application is realized, inventors herein have recognized that at least there are the following problems in the prior art：After each group member of a user's group sets up a group head by way of electing, the group head further selects its used physical resource when declaring information to group member's transmission group（The physical resource is that group declares channel resource）.Wherein, group head to group member's transmission group declare the purpose of information be in order to notify group member oneself turn into user's group group head.But, for different user's groups, the group head of each user's group, which is likely to seize identical physical resources as group, declares channel resource, so as to can interfere the D2D generations that communicate of each user's group.Also, during each group member in the user's group elects group head, need to interact substantial amounts of signaling between each group member, so as to can also waste the substantial amounts of signaling consumption of system.

Further, since not carrying out any checking to the group head of foundation, therefore, the group head is also possible to can have safety issue.

The content of the invention

In order to solve the above-mentioned technical problem, the embodiment of the present application provides a kind of set up in D2D communications and used The method and apparatus of the group head of family group, with solve in the prior art due to the group of different user groups selected group declare that channel resource is overlapped, and cause the problem of D2D communication generations of different user groups are interfered, setting up the problem of process of group head of user's group can waste a large amount of signaling consumptions while also solving.

Further, also solve when setting up the group head of user's group, due to the safety issue that group head is not verified and existed.

The acquisition problem of the Qos parameters of user's group is also solved simultaneously.

The embodiment of the present application discloses following technical scheme：

It is according to embodiments of the present invention in a first aspect, disclose a kind of method for the group head that user's group is set up in D2D communications, including：

Base station receives the group mark that targeted group is at least carried in the first request message for D2D equipment to be set up to the group head as targeted group, first request message and the device identification of D2D equipment；

Group mark and device identification of the base station in first request message determine the group head of targeted group and targeted group respectively, and are distributed for the targeted group for group head and declare that the group of information declares channel resource to group member's transmission group；

Base station sends the first response message for D2D equipment to be set up to the group head as targeted group, and the group mark that the targeted group is at least carried in first response message and described group declare the station location marker of channel resource；

Wherein, the D2D equipment that the device identification is indicated is any one the D2D equipment for the cellular cell for being linked into the base station covering.

With reference to the first aspect of the present invention, the present invention also has the first possible, i.e., methods described also includes：Base station is that the targeted group distributes the data transmission resources that data are transmitted for group head and group member；The station location marker of the data transmission resources is then also carried in first response message, described group is declared that information is used to carry the data transmission resources.

The first with reference to the first aspect of the present invention and first aspect is possible, and the present invention is also possible with second, i.e., methods described also includes：

Before being targeted group distribution physical resource in base station, base station verifies whether the targeted group is legal and whether the D2D equipment is qualified as the targeted group using core network element Group head；

Base station is that targeted group distribution physical resource is specially：

When being verified, base station is that the targeted group distributes physical resource；

Wherein, the physical resource is that group declares channel resource, or, group declares channel resource and data transmission resources.

The first with reference to the first aspect of the present invention and first aspect is possible, and the present invention also has the third possible, i.e., the physical resource of base station distribution is in unactivated state；Methods described also includes：

Base station receives the activation request message or the special SR signals of D2D that are used to activate the physical resource of unactivated state for needing the D2D equipment for transmitting data to send；

Base station activation physical resource；

Base station is sent for by the activation response message or the special SR signals of D2D of the activation of the physical resource of unactivated state to needing the D2D equipment for transmitting data；

The third with reference to the first aspect of the present invention is possible, and the present invention also there is the 4th kind of possibility, i.e. methods described also to include：

What the D2D equipment that base station receives end of transmission was sent is used to deactivate request message or the special SR signals of D2D by what the physical resource of state of activation was deactivated；

Base station deactivates physical resource；

Base station is sent for the physical resource deactivation of state of activation to be activated into response message or the special SR signals of D2D to the D2D equipment of end of transmission；

The first with reference to the first aspect of the present invention is possible, and the present invention also has the 5th kind of possibility, i.e., described base station is distributed for the targeted group is specially for the data transmission resources of group head and group member's transmission data：Base station obtains the Qos parameter or parameter group of the targeted group from core network element, and is that the targeted group distributes the data transmission resources according to the Qos parameters or parameter group of the targeted group. The first with reference to the first aspect of the present invention and first aspect is possible, and the present invention also there is the 6th kind of possibility, i.e. methods described also to include：

The SIB message of the station location marker of the group mark for carrying the targeted group and physical resource is broadcasted in the range of the cellular cell of covering in base station；

Or,

All D2D equipment of base station to the cellular cell for being linked into itself covering send the dedicated signaling of the station location marker of the group mark for carrying the targeted group and physical resource；

Wherein, the physical resource is that group declares channel resource, or, group declares channel resource and/or data transmission resources.

The first with reference to the first aspect of the present invention and first aspect is possible, and the present invention also there is the 7th kind of possibility, i.e. methods described also to include：

Base station receives the group mark that the targeted group is at least carried in the second request message for changing physical resource, second request message and the device identification of described group of head；

Group mark and device identification of the base station in second request message determine the group head of targeted group and targeted group respectively, and change physical resource for the targeted group；

Base station sends the station location marker that the physical resource after changing at least is carried in the second response message for changing physical resource, second response message；

The first with reference to the first aspect of the present invention and first aspect is possible, and the present invention also there is the 8th kind of possibility, i.e. methods described also to include：

Base station is notified the physical resource that the targeted group currently takes to the base station closed on by X2 interface message；

With reference to the 7th kind of possibility of the first aspect of the present invention, the present invention also has the 9th kind of possibility, i.e. second request message sends for the group head of the targeted group when the group communication quality for monitoring the targeted group is less than default threshold value； Or,

Second request message sends for the group head of the targeted group when initiating cell switching.With reference to the 9th kind of possibility of the first aspect of the present invention, the present invention also has the tenth kind of possibility, if i.e. described second request message sends for the group head of the targeted group when initiating cell switching, second request message is specially the RRC radio reconfiguration complete message in handoff procedure.

The first with reference to the first aspect of the present invention and first aspect is possible, and the present invention is also a kind of possible with the tenth, i.e., methods described also includes：

Base station is that the targeted group changes physical resource；

The station location marker that the physical resource after changing at least is carried in the control message for changing physical resource, the control message is sent to the group hair of the targeted group in base station；

The confirmation message for the replacing physical resource that the group head that base station receives the targeted group is returned；Wherein, the physical resource is that group declares channel resource, or, group declares channel resource and/or data transmission resources.

Second aspect according to embodiments of the present invention, discloses a kind of device for the group head that user's group is set up in D2D communications, including：

First receiving unit, group mark and the device identification of D2D equipment of targeted group are at least carried for receiving in the first request message for being used for that D2D equipment to be set up to the group head as targeted group, first request message；

First allocation unit, the group head of targeted group and targeted group is determined respectively for the group mark in first request message and device identification, and is distributed for the targeted group for group head and declared that the group of information declares channel resource to group member's transmission group；

First transmitting element, sets up D2D equipment for sending the first response message of the group head as the targeted group, and the group mark that the targeted group is at least carried in first response message and described group declare the station location marker of channel resource；

With reference to the second aspect of the present invention, the present invention also has the first possible, i.e., described device also includes：Second allocation unit, the number of data is transmitted for being distributed for the targeted group for group head and group member According to transfer resource；

The station location marker of the data transmission resources is then also carried in first response message, described group is declared that information is used to carry the data transmission resources.

The first with reference to the second aspect of the present invention and second aspect is possible, and the present invention is also possible with second, i.e., described device also includes：

Authentication unit, for being that the targeted group distribution group declares channel resource in the first allocation unit, or, it is to verify whether the targeted group legal using core network element and whether the D2D equipment is qualified as the group head of the targeted group before the targeted group distribution group declares that channel resource and the second allocation unit are targeted group distribution data transmission resources in the first allocation unit；Then first allocation unit is specifically for being that channel resource is declared in described group of the targeted group distribution when being verified；

Then second allocation unit is specifically for being that the targeted group distributes the data transmission resources when being verified.

The first with reference to the second aspect of the present invention and second aspect is possible, and the present invention also has the third possible, i.e., the physical resource of base station distribution is in unactivated state；Described device also includes：

Second receiving unit, the activation request message or the special SR signals of D2D that are used to activate the physical resource of unactivated state for needing the D2D equipment for transmitting data to send for receiving；

Unit is activated, for activating physical resource；

Second transmitting element, for needing the D2D equipment for transmitting data to send for by the activation response message or the special SR signals of D2D of the activation of the physical resource of unactivated state；

The third with reference to second aspect of the present invention is possible, and the present invention also there is the 4th kind of possibility, i.e. described device also to include：

3rd receiving unit, for receiving the deactivation request message or the special SR signals of D2D that are used to deactivate the physical resource of state of activation that the D2D equipment of end of transmission is sent；

Unit is deactivated, for deactivating physical resource；

3rd transmitting element, for needing the D2D equipment for transmitting data to send for shape will to be activated Activation response message or the special SR signals of D2D that the physical resource of state is deactivated；

The first with reference to the second aspect of the present invention may, the present invention also has the 4th kind of possibility, i.e. described second allocation unit specifically for, the Qos parameter or parameter group of the targeted group are obtained from core network element, and is that the targeted group distributes the data transmission resources according to the Qos parameters or parameter group of the targeted group.

The first with reference to the second aspect of the present invention and second aspect is possible, and the present invention also there is the 5th kind of possibility, i.e. described device also to include：

Radio unit, the SIB message for the station location marker of the group mark physical resource of the broadcast carrying targeted group in the range of the cellular cell of covering；

Or,

Dedicated signaling transmitting element, all D2D equipment for base station to the cellular cell for being linked into itself covering send the dedicated signaling of the station location marker of the group mark for carrying the targeted group and physical resource；Wherein, the physical resource is that group declares channel resource, or, group declares channel resource and/or data transmission resources.

The first with reference to the second aspect of the present invention and second aspect is possible, and the present invention also there is the 6th kind of possibility, i.e. described device also to include：

4th receiving unit, group mark and the device identification of described group of head of the targeted group are at least carried for receiving in the second request message for being used for changing physical resource, second request message；

First changes unit, determines the group head of targeted group and targeted group respectively for the group mark in second request message and device identification, and changes physical resource for the targeted group；4th transmitting element, the station location marker that the physical resource after changing at least is carried in the second response message of physical resource, second response message is changed for sending；

The first with reference to the second aspect of the present invention and second aspect is possible, and the present invention also there is the 7th kind of possibility, i.e. described device also to include： Notification unit, for being notified the physical resource that the targeted group currently takes to the base station closed on by X2 interface message；

The first with reference to the second aspect of the present invention and second aspect is possible, and the present invention also there is the 8th kind of possibility, i.e. described device also to include：

Second changes unit, for changing physical resource for the targeted group；

5th transmitting element, the station location marker that the physical resource after changing at least is carried in the control message of physical resource, the control message is changed for being sent to the group hair of the targeted group；

5th receiving unit, the confirmation message for receiving the replacing physical resource that the group head of the targeted group is returned；

As can be seen from the above-described embodiment, compared with prior art, the application has the following advantages that：The request of base station in response D2D equipment, declare that group declares channel resource used in information to group member's transmission group when it is as group head for D2D equipment distribution, SP, the group of user's group declares that channel resource is by base station unified planning and distributed, therefore, the group that different user groups can be avoided the occurrence of declares the problem of channel resource is overlapped, and then also can just avoid the D2D of different user groups from communicating the problem of interfere.In addition, data transmission resources for transmitting data also for targeted group unified planning and are distributed in base station, it is to avoid group member seizes to identical data transmission resources, improves resource utilization.

Also, the whole process of determination group head only relates to base station and as the Signalling exchange between the D2D equipment of group head, while also saving signaling consumption, it is to avoid waste of the system resource on signaling consumption.

Further, also solve when setting up the group head of user's group, due to the safety issue that group head is not verified and existed.Brief description of the drawings will be briefly described, for ordinary skill people to the required accompanying drawing used in embodiment or description of the prior art below in order to illustrate more clearly of the embodiment of the present application or technical scheme of the prior art For member, without having to pay creative labor, other accompanying drawings can also be obtained according to these accompanying drawings.

Fig. 1 is a kind of flow chart of the method for group head that user's group is set up in D2D communications that the embodiment of the present application one is provided；

Fig. 2 is a kind of signaling diagram of the method for group head that user's group is set up in D2D communications that the embodiment of the present application two is provided；

Fig. 3 is moved to a schematic diagram of a scenario of adjacent cell for targeted customer group membership in the application；Fig. 4 is moved to another schematic diagram of a scenario of adjacent cell for targeted customer group membership in the application；Fig. 5 is the flow chart for the method that a kind of replacing group in D2D communications that the embodiment of the present application three is provided declares channel resource；

Fig. 6 is the signaling diagram for the method that a kind of replacing group in D2D communications that the embodiment of the present application four is provided declares channel resource and data transmission resources；

Fig. 7 is the signaling diagram for the method that a kind of replacing group in D2D communications that the embodiment of the present application five is provided declares channel resource and data transmission resources；

Fig. 8 is a kind of structure chart of the device for group head that user's group is set up in D2D communications that the embodiment of the present application six is provided；

Fig. 9 is the structure chart of the device for another group head that user's group is set up in D2D communications that the embodiment of the present application six is provided；

Figure 10 is the structure chart of the device for another group head that user's group is set up in D2D communications that the embodiment of the present application six is provided；

Figure 11 is the structure chart of the device for another group head that user's group is set up in D2D communications that the embodiment of the present application six is provided；

Figure 12 is the structure chart of the communication device of the present invention.Embodiment is in the technical scheme of the application, and the group head of user's group is not to be determined by each group member by way of election, but directly determined by base station.That is, if any one the D2D equipment being linked into the cellular cell of base station covering is thought of as the group head of a targeted group, a request message can be sent to the base station, as response, base station will distribute it for the D2D equipment and be declared as group head in transmission group Used physical resource during title information（The physical resource is that group declares channel resource）, and the group is declared that the station location marker of channel resource notifies to give the D2D equipment by response message.Because the group of each user's group declares that channel resource is distributed unitedly by base station, therefore, the group that different user groups can be avoided the occurrence of declares the problem of channel resource is overlapped, and then also can just avoid the D2D of different user groups from communicating the problem of interfere.

Below in conjunction with the accompanying drawings and embodiment, the embodiment of the present application is described in detail.It should be appreciated that specific embodiment described herein is not used to limit the application only to explain the application.After a D2D equipment is resident to a cellular cell, by reading the system broadcast message of the cellular cell, e.g., SIB (System Information Block, system information block）Message, to discover whether that oneself user's group interested has been set up.Wherein, system broadcast message can include multiple user's groups（These user's groups are responsible for by the base station of the cellular cell）Information, e.g., including at least having：The group mark of the group name of each user's group, each user's group（Group ID) and type of service title (if the service name D2D equipment is interested in wherein some user's group, and want to be the group head of the user's group；Or, if the D2D equipment does not have user's group interested, and it is intended to oneself set up a new user's group, and the group head as the new user's group；Again or, if in system broadcast message do not include any user's group information（I.e. there is presently no the user's group of establishment）, the D2D equipment is thought oneself to set up first user's group, and turns into the group head of first user's group.When above-mentioned application scenarios occur, the group head of user's group can be set up by implementing the technical scheme of the application.Embodiment one

Referring to Fig. 1, it is a kind of flow chart of the method for group head that user's group is set up in D2D communications of the offer of the embodiment of the present application one, comprise the following steps：

Step 101:Base station receives the group mark that targeted group is at least carried in the first request message for D2D equipment to be set up to the group head as targeted group, first request message and the device identification of D2D equipment；

Wherein, the D2D equipment that device identification is indicated is times for the cellular cell for being linked into the base station covering One D2D equipment of meaning.The device identification of the D2D equipment can be a mark or C-RNTI of the D2D equipment oneself, can also be a mark of core net distribution.

Step 102:Base station determines the group head of targeted group and targeted group respectively for the group mark in first request message and device identification, and is distributed for the targeted group for group head and declare that the group of information declares channel resource to group member's transmission group；

Step 103:Base station sends the first response message for D2D equipment to be set up to the group head as targeted group, and the group mark that the targeted group is at least carried in first response message and described group declare the station location marker of channel resource.

In the preferred embodiment of the application, the data transmission resources that data are transmitted for group head and group member are also distributed in base station for the targeted group.

Therefore, the station location marker of data transmission resources is carried in the first response message, described group is declared that information is additionally operable to carry the data transmission resources.

D2D equipment declares that the station location marker of channel resource determination group can declare the position of channel resource from physical resource according to group, and as the user's group group head it is determined that the group declare on channel resource to declare information to group member's transmission group of the user's group.When carrying the station location marker of data transmission resources in declaring information in group, the group member of the user also just can further know the position of data transmission resources.

In addition, in the preferred embodiment of the application, the mode of transmission data is may further specify that in group declares information, which includes but is not limited to transmission time, the frequency using data transmission resources or the cycle of data, the type of service of data, and group member will carry out D2D communications in the way of group head is in defined during group declares information.

It should be noted that " station location marker " refers to for indicating the frequency location of Radio Resource and the mark of time location.Specifically, in LTE system, frequency location refers to the numbering or RB (resource blocks of subcarrier）Numbering, time location is System Frame Number and per the subframe number in frame.It is probably to be made up of multiple RB in the time span of multiple subframes to declare channel.

In the preferred embodiment of the application, after the group head of the user's group is established, base station can also broadcast the group mark and the described group of station location marker for declaring channel resource that the targeted group is carried in SIB message, the SIB message in the range of the cellular cell of covering（If base station, which is the user's group, which to be assigned with data transmission resources, SIB message, can also carry the station location marker of data transmission resources）.In this way, base station can inform positioned at itself covering cellular cell scope all D2D equipment its be responsible for Which user's group, and group used in each user's group declare channel resource（It can further include data transmission resources）.

Base station is in addition to it can broadcast SIB message, dedicated signaling can also be sent to all D2D equipment for the cellular cell for being linked into itself covering, the group mark that the targeted group is carried in the dedicated signaling and described group declare the station location marker of channel resource（Equally, the station location marker of data transmission resources can also be further carried in SIB message）.

It is that the method shown in Fig. 1 also includes before targeted group distribution group declares channel resource in base station to be further ensured that the group head of foundation has security in another preferred embodiment of the application：Base station verifies whether the targeted group legal using core network element and whether the D2D equipment is qualified as the group head of the targeted group；Then step 102 is specially：When being verified, base station is that the targeted group is distributed for group head and to declare that the group of information declares channel resource to group member's transmission group.

Certainly, if data transmission resources are also distributed in base station for targeted group, it is also desirable to before distribution data transmission resources, perform above-mentioned verification process, and after being verified, data transmission resources just are distributed for targeted group.

As can be seen from the above-described embodiment, compared with prior art, the technical scheme of the present embodiment has the following advantages that：

The request of base station in response D2D equipment, declare that group declares channel resource used in information to group member's transmission group when it is as group head for D2D equipment distribution, SP, the group of user's group declares that channel resource is by base station unified planning and distributed, therefore, the group that different user groups can be avoided the occurrence of declares the problem of channel resource is overlapped, and then also can just avoid the D2D of different user groups from communicating the problem of interfere.In addition, data transmission resources for transmitting data also for targeted group unified planning and are distributed in base station, it is to avoid group member seizes to identical data transmission resources, improves resource utilization.

Also, the whole process of determination group head only relates to base station and as the Signalling exchange between the D2D equipment of group head, while also saving signaling consumption, it is to avoid waste of the system resource on signaling consumption.Certainly, group head be it is unfixed, can the rotation between multiple D2D equipment, regardless of whether which D2D equipment can all save signaling consumption as a group head, it is to avoid waste.

Further, also solve when setting up the group head of user's group, due to the safety issue that group head is not verified and existed. Embodiment

Based on the method implemented described in one, the present embodiment two provides a kind of signaling process for realizing this method.Refer to shown in Fig. 2, it is a kind of signaling diagram of the method for group head that user's group is set up in D2D communications that the embodiment of the present application two is provided.Wherein,

Step 201：ENB receives the start PS communication request message that D2D equipment is sent；Group mark (Group ID) and the device identification (UE ID) of D2D equipment of some user's group are carried in start PS communication request message, eNB obtains Group ID and UE ID from start PS communication request message.

Step 202：ENB sends group inquire request message to core network element；

Group ID and UE ID are carried in group inquire request message, core network element extracts Group ID and UE ID from group inquire request message, verify whether the user's group that the Group ID are indicated is legal, and verify whether the D2D equipment of UE ID instructions is qualified as the group head of the user's group（If the user's group has built up）, or, verify whether the D2D equipment of UE ID instructions is qualified and set up the user's group and the group head as the user's group（If the user's group is not set up）.

Certainly, if the D2D equipment in step 201 wants the member as the user's group, core network element can also verify whether the D2D equipment that the UE ID are indicated is qualified as the member of the user's group.

Furthermore, it is contemplated that group head can must just be communicated in the case of position is suitable with all other group members, core network element can also be verified to the position of the D2D equipment, to determine if to be qualified as a group head.Accordingly, the positional information of the D2D equipment can also be carried in Start PS communication request message（For example, the information such as longitude, dimension and height）.

Also, treating capacity in view of group head is more than other group members, if the electricity for organizing head is inadequate, a group head will be replaced as frequently as, this can make the communication between group member cause interruption, ultimately result in that service quality is poor, core network element can also be verified to the dump energy of the D2D equipment, to determine if to be qualified as a group head.Accordingly, the dump energy of the D2D equipment can also be carried in start PS communication request message（For example, when use time, watt * or * amperes of *）.

Obviously, the positional information and dump energy of the D2D equipment are the Optional Field in start PS communication request message.

Step 203:In the case where being verified, core network element responds eNB-individual group inquire response message； Indicate and be verified in group inquire response message, or even group member's list of the user's group can also be further carried in the group inquire response message.

Further, Qos (the Quality Of Service, service quality of the user's group can also be carried in group inquire response message）Parameter or parameter group.Wherein, Qos parameter groups at least include the Qos parameters of voice.Qos parameters in the application are different from the Qos parameters in cellular communication, include minimum transmission rate, the coverage and packet loss of sender.The coverage of sender can be the coverage that an absolute value or guarantee reach certain packet loss, or, it can also be and ensureing the coverage under minimum transmission rate.Packet loss：The first explanation is the packet loss of recipient at defined maximum coverage range；Second of explanation is the minimum of the packet loss of all recipients in coverage.If the user's group supports multiple business classification, such as FTP or video calling business, each class of service just has one group of Qos parameter.

Certainly, core network element can also send the Qos parameters or parameter group of the user's group by other message to eNB.ENB can be in group inquire response message Qos parameters come for each member in the user's group（Including group head and group member）Distribution group declares channel resource and data transmission resources.That is, to the user's group dividing frequency and time resource.In the case of possible, eNB can also distribute the information such as group scrambler and group synchronous code used in D2D communications.

In order to improve allocation efficiency of resource, eNB can configure group for some user's group in advance and declare channel resource, but, because eNB is not received on before the establishment of the user's group is vertical or D2D terminals have a request of communication requirement, eNB can't distribute to the user's group.Only after eNB is received on the establishment of the user's group is vertical or D2D terminals have the request of communication requirement, and core net confirms, pre-configured group is just declared that channel resource allocation is used to D2D groups.

Certainly, in addition, to be also the configuration parameter of the D2D equipment distributing users face data protocol, including MAC (Medium Access Control, medium education）, RLC (Radio Link Control, wireless spread-spectrum technology）, PDCP (Packet Data Convergence Protocol, bag convergence protocol）With PHY (physical layer, physical layer）Configuration parameter.

It is possible in view of the few members of a user's group not under eNB covering, therefore, the configuration parameter of the user face data agreement of D2D equipment, which is likely to be, is predefined in D2D device interiors.These predefined configuration parameters can be identified by the classification number of parameter group, and these classification numbers and eNB from the service class alias of the Qos parameter groups of some obtained class of service of MME be one-to-one. Step 204:After resource and complete parametric distribution, eNB responds D2D one group establishment response message of equipment；

Group ID, group, which are carried, in group establishment response message declares the station location marker of channel resource and the station location marker of data transmission resources（Group declares that channel resource and data transmission resources are Qos parametric distributions of the eNB according to each class of service）.Optionally, eNB also sends the configuration parameter of user face data agreement.

D2D equipment declares that the station location marker of channel resource determines that group declares channel resource according to group, and declare that transmission group declares information on channel resource in the group, the station location marker of data transmission resources is carried in the group declares information, data transmission resources can be known so as to other group members of the targeted group.Optionally, the configuration parameter of user face data agreement may also be carried.

Optionally, when not having the configuration parameter of pre-defined user face data agreement in D2D equipment, the group declares that the configuration parameter of user face data agreement can also be carried in information.

In addition, D2D equipment configures the substance parameter of Access Layer protocol stack according to the configuration parameter of user face data agreement, the physical channel according to used in the station location marker of data transmission resources configures transmission/reception D2D communication datas.

Step 205:ENB broadcasts SIB message in the range of the cellular cell of covering.

ENB can broadcast the SIB message while group establishment response message is sent.The SIB message can also be broadcasted after group establishment response message is sent.

Wherein, the group mark and group that the targeted group is carried in the SIB message declare the station location marker of channel resource.

Certainly, in addition to broadcasting SIB message, eNB can also send a dedicated signaling to all D2D equipment for the cellular cell for being linked into itself covering.

The request of base station in response D2D equipment, declare that group declares channel resource used in information to group member's transmission group when it is as group head for D2D equipment distribution, SP, the group of user's group declares that channel resource is by base station unified planning and distributed, therefore, the group that different user groups can be avoided the occurrence of declares the problem of channel resource is overlapped, and then also can just avoid the D2D of different user groups from communicating the problem of interfere.In addition, data transmission resources for transmitting data also for targeted group unified planning and are distributed in base station, Avoid group member from seizing identical data transmission resources, improve resource utilization.

In addition, the process of checking only occurs between eNB and core network element, can so eNB be facilitated to preserve the result.Once the D2D equipment is left after the user's group, if there is another D2D equipment requirement to set up the user's group and as group head again, eNB may not necessarily recycle whether core net is legal to the user's group to verify.Embodiment three

Pass through above-described embodiment two, any one D2D equipment in the cellular cell that eNB is covered is established as the group head of a user's group, and, once set up, the D2D equipment is always the group head of the user's group, and the group of eNB distribution declares channel resource and data transmission resources also all the time all in state of activation.

The present embodiment three from unlike embodiment two, it is all in the cellular cell that eNB is first covered

D2D equipment is established as the prepared group head of a user's group, now, and the group of eNB distribution declares channel resource and data transmission resources all in unactivated state.In all prepared groups head, if which prepared group head needs to transmit data, it is possible to ask eNB activation groups to declare channel resource and data transmission resources at this time, it may be necessary to which the prepared group head for transmitting data turns into formal group head.After data transfer is finished, formal group head asks eNB deactivation groups to declare channel resource and data transmission resources again, formally organizes and nose heave is newly changed into prepared group head.That is, which prepared group head needs to transmit data, which prepared group head is just properly termed as formally organizing head.Therefore, formal group head switches in turn between multiple prepared groups head.

It is shown in Figure 2, after execution of step 201-205, all D2D equipment for initiating request are only now prepared group head, and, the group that eNB is distributed declares that channel resource and data transmission resources are now also at unactivated state, that is to say, that the D2D equipment is to be aware of the positional information for declaring channel resource and data transmission resources, but can not use immediately, can only could be used when D2D equipment is referred to as and formally organizes head.

When the demand that some D2D equipment has data to send or receive, the D2D equipment declares channel resource and data transmission resources to eNB requests activation group, and specific method is： 1) the D2D equipment sends activation request message to eNB, and the bit for indicating activation is carried in the activation request message（For example, bit represents activation when being 1, represent to deactivate when being 0）；Base station is received after activation request message, and activation group declares channel resource and data transmission resources, and returns to activation response message, now, and the D2D equipment becomes formally to organize head from prepared group head.

2) D2D sends special SR (Source Request) signals of a D2D to eNB, this SR signal is used to ask activation group to declare channel resource and data transmission resources, eNB is received after SR signals, activation group declares channel resource and data transmission resources, now, the D2D equipment becomes formally to organize head from prepared group head.

Accordingly, after the D2D equipment completes to send or receives data, the D2D equipment sends to eNB and deactivates request message（Indicated by bit）, base station, which is received, to be deactivated after request message, and deactivation group declares channel resource and data transmission resources, and returns to deactivation response message, now, and the D2D equipment becomes prepared group head from formal group head.Or, the D2D equipment sends SR signals to eNB, and request base station deactivation group declares channel resource and data transmission resources, and base station receives SR signals, and deactivation group declares channel resource and data transmission resources.Example IV

After the group head that D2D equipment turns into targeted group, if organizing the communication resource of the existing targeted group where it of hair by than more serious interference, or, if existing its of group hair is moved into adjacent area, the replacing flow of the communication resource will be initiated to base station.Wherein, group head is moved to adjacent area in the presence of two kinds of situations, and a kind of situation is all members of targeted group（Including group head）From adjacent cell is all moved to, as shown in figure 3, all members are moved to cell 2 from cell 1;Another situation is the few members of targeted group（Including group head）Adjacent cell is moved to, as shown in figure 4, few members are moved to cell from cell 1.

Referring to Fig. 5, the flow chart of its method that channel resource is declared for a kind of replacing group in D2D communications that the embodiment of the present application three is provided, this method is implemented after the method in embodiment one, following steps are specifically included：

Step 501:What the group hair that base station receives the targeted group was sent changes the group mark that the targeted group is at least carried in described group of the second request message for declaring channel resource, second request message and the device identification of described group of head； The group head of the targeted group sends the second request message in the small default threshold value of the group communication quality that monitors the targeted group to base station.For example, group head can be to IOT (Interference Over Thermal noise, interference and the ratio of thermal noise）, PER (Packet Error Rate, the bag bit error rate）Or BLER (Block Error Rate, bLock error rate）It is monitored, when IOT, PER or BLER are less than a corresponding default threshold value, illustrates that now group communication quality is poor, the communication resource is received than more serious interference.

In addition, the group head of the targeted group can also be when initiating cell switching to the second request message of base station transmission.Second request message is specially the RRC radio reconfiguration complete message in handoff procedure.

Step 502:Base station is that channel resource is declared in described group of targeted group replacing；

Resource is changed in base station for convenience, and the station location marker of disturbed resource can also be carried in the second request message（That is, group declares the station location marker of channel resource）, and organize the station location marker that head thinks each few resource of interference.So, base station is it is determined that disturbed resource and after disturbing each few resource, it is possible to according to each few resource of disturbed resource, interference and oneself call the demand of phone user, to determine which resource can be as new resources.

It should be noted that base station can use any one decision-making technique of the prior art to determine which resource for new resources, the specific implementation of the application decision-making technique is not limited.

Step 503：Base station is sent to the group hair of the targeted group changes the station location marker that the group at least carried after changing in described group of the second response message for declaring channel resource, second response message declares channel resource.

Aforesaid way is applied equally to only change data transmission resources, and replacing group declares channel resource and data transmission resources simultaneously.

The group that the targeted group currently takes can also be declared channel resource announcement to the base station closed on by base station by X2 interface message.To avoid the base station closed on from declaring channel resource allocation to others D2D equipment identical group.The advice method is applied equally to data transmission resources, so that identical data transmission resources are distributed to other D2D equipment by the base station closed on.

For the group head of the targeted group, it can use the group before changing to declare that channel resource sends a message to other group members, and the station location marker of the data transmission resources after changing is carried within the message, the message can also further carry the entry-into-force time of the data transmission resources after changing.In addition, group head can also Group after replacing declares that channel resource transmission group declares information.

In addition to the group of distributing user group declares channel resource and physical resource, base station also is responsible for changing it.It can equally avoid the group of different user groups from declaring to overlap between channel resource and physical resource, and then avoid the D2D of different user groups from communicating the problem of interfere.

Also, whole Renewal process also only relates to the Signalling exchange between base station and group head, while also saving signaling consumption, it is to avoid waste of the system resource on signaling consumption.Embodiment five

Illustrate that replacing group declares the flow of channel resource and data transmission resources so that the communication resource of the targeted group where group hair now its is by than more serious interference as an example below.Referring to Fig. 6, it is a kind of signaling diagram of method that the communication resource is changed in D2D communications of the offer of the embodiment of the present application four.Wherein, step 601:Group head sends group resource change request message according to the monitoring to group communication quality to eNB；

The station location marker of UE ID, Group ID, the station location marker of disturbed resource and the few each resource of interference is carried in group resource change request message.

Fields of the eNB in Group resource change request message, and oneself the demand of phone user is dispatched, determine that new group declares channel resource and data transmission resources.

Step 602：ENB returns to group resource change response message to group head；Carried in group resource change response message change after group declare channel resource station location marker and replacing after data transmission resources station location marker, so as to group head according to station location marker determine change after group declare channel resource and change after data transmission resources.

Except this sunset is foretold, the Optional Field of following any one or any number of combinations can also be carried in group resource change response message：Group after replacing declares entry-into-force time, the configuration parameter of user face data agreement and the reporting schemes for organizing communication quality of channel resource and data transmission resources.When not carrying above-mentioned Optional Field in Group resource change response message, group head can use the default value of itself.

Step 603:Group head sends resource handover message on the data transmission resources before replacing； The station location marker of the data transmission resources after changing is carried in resource handover message.Other group members of the user's group can determine the data transmission resources after changing according to station location marker, and after being reached so as to the entry-into-force time of data transmission resources after changing, the physical channel of transmission/reception data is configured according to the data transmission resources after replacing.

Group head can periodically send resource handover message, so that resource handover message can be correctly received completely by all group members.

Step 604:Group of the group head after replacing declares that transmission group declares information on channel resource.

Group after replacing declares after the entry-into-force time arrival of channel resource that the group that group head just can be after replacing declares that transmission group declares information on channel resource.

Step 605：ENB is by X2 interface to neighbouring base station（That is, N-eNB) send group response change indication message；

The station location marker of the data transmission resources after changing is carried in group response change indication message, so that the data transmission resources for currently taking targeted group are notified to the base station closed on.

It should be noted that eNB is after new data transmission resources are determined, it is possible to send group response change indication message to neighbouring base station.There is no sequencing relation between gp, step 602 and step 605.

Step 606:ENB broadcasts SIB message in the range of the cellular cell of covering.

In the SIB message in addition to carrying the group of the targeted group and identifying, the station location marker that the group after changing declares channel resource is also carried.

It should also be noted that, eNB is after Xiang Zutou returns to group resource change response message, it is possible to broadcast the SIB message.There is no sequencing to close between gp, step 606 and step 603 certain, in addition to broadcasting SIB message, eNB can also send a dedicated signaling to all D2D equipment for the cellular cell for being linked into itself covering.

If group head is the replacing flow that the communication resource is initiated in the case where finding that it is moved into adjacent area, so, in above-mentioned steps 601, group head sends group resource change request message to target eNB (that is, T-eNB).Another sunset is foretold, in above-mentioned steps 605, and group response change indication message is sent from target eNB to source eNB (that is, S-eNB).

As can be seen from the above-described embodiment, compared with prior art, the technical scheme of the present embodiment has as follows Advantage：

Also, whole Renewal process also only relates to the Signalling exchange between base station and group head, while also saving signaling consumption, it is to avoid waste of the system resource on signaling consumption.Embodiment six

In addition to group head can initiate the replacing flow of a communication resource to base station, base station can also play the replacing flow that a group declares channel resource and data transmission resources to group hair.For example, base station determines to play the replacing flow of a resource to group hair according to load condition, the situation of movement of D2D equipment or group communication quality.

Referring to Fig. 7, the signaling diagram of its method that channel resource and data transmission resources are declared for a kind of replacing group in D2D communications that the embodiment of the present application five is provided.Wherein,

Step 701:ENB send group resource change request message after channel resource and data transmission resources are declared for targeted group replacing group to a group hair；

Carried in group resource change request message change after group declare channel resource station location marker and replacing after data transmission resources station location marker.

Step 702：Group head returns to group resource comfirm message to eNB；

Step 703:Group head sends resource handover message on the data transmission resources before replacing；The station location marker of the data transmission resources after changing is carried in resource handover message.Other group members of the user's group can determine the data transmission resources after changing according to station location marker, and after being reached so as to the entry-into-force time of data transmission resources after changing, the physical channel of transmission/reception data is configured according to the data transmission resources after replacing.

Group head can periodically send resource handover message.

Step 704:Group of the group head after replacing declares that transmission group declares information on channel resource.

Step 705：ENB is by X2 interface to neighbouring base station（That is, N-eNB) send group response Change indication message；

Step 706:ENB broadcasts SIB message in the range of the cellular cell of covering.

Also, whole Renewal process also only relates to the Signalling exchange between base station and group head, while also saving signaling consumption, it is to avoid waste of the system resource on signaling consumption.Embodiment seven

Corresponding with a kind of method for the group head that user's group is set up in D2D communications, the embodiment of the present application additionally provides a kind of device for the group head that user's group is set up in D2D communications.Referring to Fig. 8, it is a kind of structure chart of the device of group head that user's group is set up in D2D communications of the offer of the embodiment of the present application six.The device includes：First receiving unit 801, the first allocation unit 802 and the first transmitting element 803.Wherein, the first receiving unit 801, group mark and the device identification of D2D equipment of targeted group are at least carried for receiving in the first request message for being used for that D2D equipment to be set up to the group head as targeted group, first request message；

First allocation unit 802, the group head of targeted group and targeted group is determined respectively for the group mark in first request message and device identification, and is distributed for the targeted group for group head and declared that the group of information declares channel resource to group member's transmission group；

First transmitting element 803, D2D equipment is set up to the first response message of the group head as the targeted group for sending, the group mark that the targeted group is at least carried in first response message and described group declare the station location marker of channel resource.

The D2D equipment is any one the D2D equipment for the cellular cell for being linked into the base station covering. It is preferred that, on the basis of device as shown in Figure 8, as shown in figure 9, the device also includes：Authentication unit 804, for being before the targeted group distribution group declares channel resource in the first allocation unit 802, verify whether the targeted group legal using core network element and whether the D2D equipment is qualified as the group head of the targeted group；

Then first allocation unit 802 is specifically for being that channel resource is declared in described group of the targeted group distribution when being verified.

It is preferred that, on the basis of device as shown in Figure 9, as shown in Figure 10, described device also includes：Second allocation unit 805, for when being verified, being that the targeted group is distributed the data transmission resources of data are transmitted for group head and group member；

The station location marker of the data transmission resources is then also carried in first response message, described group is declared that information is used to carry the data transmission resources.Certainly, if the dress this also include the second allocation unit

805, authentication unit 804 is before the targeted group distribution group declares that channel resource and the second allocation unit 804 are targeted group distribution data transmission resources in the first allocation unit 802, verifies whether the targeted group legal using core network element and whether the D2D equipment is qualified as the group head of the targeted group；

It is preferred that, the physical resource of base station distribution is in unactivated state；The device also includes：Second receiving unit, the activation request message or the special SR signals of D2D that are used to activate the physical resource of unactivated state for needing the D2D equipment for transmitting data to send for receiving；

Unit is activated, for activating physical resource；

It is further preferred that the device also includes：

Unit is deactivated, for deactivating physical resource；

It is preferred that, second allocation unit 804 specifically for, the Qos parameter or parameter group of the targeted group are obtained from core network element, and is that the targeted group distributes the data transmission resources according to the Qos parameters or parameter group of the targeted group.

It is preferred that, the device also includes：Radio unit, the SIB message for the station location marker of the group mark of the broadcast carrying targeted group, the station location marker that described group is declared channel resource and physical resource in the range of the cellular cell of covering；

Or,

Dedicated signaling transmitting element, all D2D equipment for base station to the cellular cell for being linked into itself covering send the dedicated signaling of the station location marker of the group mark, the station location marker that described group is declared channel resource and the physical resource that carry the targeted group.

It is preferred that, on the basis of device as shown in Figure 10, as shown in figure 11（Wherein, Figure 11 does not show the part of Figure 10 shown devices）, the device also includes：

4th receiving unit 806-a, group mark and the device identification of described group of head of the targeted group are at least carried for receiving in the second request message for being used for changing physical resource, second request message；First changes unit 807-a, determines the group head of targeted group and targeted group respectively for the group mark in second request message and device identification, and changes physical resource for the targeted group；

4th transmitting element 808-a, the station location marker that the physical resource after changing at least is carried in the second response message of physical resource, second response message is changed for sending.

Or, it is preferred that on the basis of device as shown in Figure 10, the device also includes：Second changes unit 806-b, for changing physical resource for the targeted group； 5th transmitting element 807-b, the station location marker that the physical resource after changing at least is carried in the control message of physical resource, the control message is changed for being sent to the group hair of the targeted group；

5th receiving unit 808-b, the confirmation message for receiving the replacing physical resource that the group head of the targeted group is returned.

It is preferred that, second request message sends for the group head of the targeted group when the group communication quality for monitoring the targeted group is less than default threshold value；Or, second request message sends for the group head of the targeted group when initiating cell switching.

If it is further preferred that second request message is initiating what is sent when cell switches for the group head of the targeted group, second request message is specially the RRC radio reconfiguration complete message in handoff procedure.

It is further preferred that device also includes：Notification unit, for being notified the physical resource that the targeted group currently takes to the base station closed on by X2 interface message.

Further, also solve when setting up the group head of user's group, due to the safety issue that group head is not verified and existed.Said apparatus embodiment is virtual bench corresponding with embodiment of the method, and the specific of correlation unit performed Journey may refer to corresponding embodiment of the method.Embodiment eight

The embodiment of the present application additionally provides a kind of communication device, communication device is probably the host server comprising computing capability, or personal computer PC, or portable portable computer or terminal etc., the application specific embodiment is not limited implementing for communication device.

Figure 12 is the structure chart of the communication device of the application.As shown in figure 11, communication device 1200 includes：Processor (processor) 1210, communication interface (Communications Interface) 1220, memory (memory) 1230, bus 1240.

Processor 1210, communication interface 1220, memory 1230 completes mutual communication by bus 1240.

Processor 1210, for configuration processor 1232.

Specifically, program 1232 can include program code, and described program code is probably a central processor CPU including computer operation finger processor 1210, or specific integrated circuit ASIC

(Appl ication Specific Integrated Circuit), or it is arranged to implement one or more integrated circuits of the embodiment of the present application.

Memory 1130, for depositing program 1232.Memory 1230 may include high-speed RAM memory, it is also possible to also including nonvolatile memory（Non-volati le memory), for example, at least one magnetic disk storage.Program 1232 is used to perform following steps：

Receive the group mark that targeted group is at least carried in the first request message for D2D equipment to be set up to the group head as targeted group, first request message and the device identification of D2D equipment；Group mark and device identification in first request message determine the group head of targeted group and targeted group respectively, and are distributed for the targeted group for group head and declare that the group of information declares channel resource to group member's transmission group；

The first response message for D2D equipment to be set up to the group head as targeted group is sent, the group mark that the targeted group is at least carried in first response message and described group declare the station location marker of channel resource；

Wherein, the D2D equipment that the device identification is indicated is to be linked into the cellular cell of the base station covering Any one D2D equipment.

The implementation implemented referring to the corresponding units in Fig. 8-embodiment illustrated in fig. 11 of each step, will not be described here in program 1232.

The method and apparatus to a kind of group head for setting up user's group in D2D communications provided herein are described in detail above, specific embodiment used herein is set forth to the principle and embodiment of the application, and the explanation of above example is only intended to help and understands the present processes and its core concept；Simultaneously for those of ordinary skill in the art, under the premise of principle described herein is not departed from, some improvements and modifications can also be made, these improvements and modifications also should be regarded as the protection domain of the application.

Claims

Claim

1st, a kind of method for the group head that user's group is set up in D2D communications, it is characterised in that including：Base station receives the group mark that targeted group is at least carried in the first request message for D2D equipment to be set up to the group head as targeted group, first request message and the device identification of D2D equipment；

Group mark and device identification of the base station in first request message determine the group head of targeted group and targeted group respectively, and are distributed for the targeted group for group head and declare that the group of information declares channel resource to group member's transmission group；

Base station sends the first response message for D2D equipment to be set up to the group head as targeted group, and the group mark that the targeted group is at least carried in first response message and described group declare the station location marker of channel resource；

Wherein, the D2D equipment that the device identification is indicated is any one the D2D equipment for the cellular cell for being linked into the base station covering.

2nd, according to the method described in claim 1, it is characterised in that methods described also includes：Base station is that the targeted group distributes the data transmission resources that data are transmitted for group head and group member；The station location marker of the data transmission resources is then also carried in first response message, described group is declared that information is used to carry the data transmission resources.

3rd, method according to claim 1 or 2, it is characterised in that methods described also includes：Before being targeted group distribution physical resource in base station, base station verifies whether the targeted group legal using core network element and whether the D2D equipment is qualified as the group head of the targeted group；

Base station is that targeted group distribution physical resource is specially：

When being verified, base station is that the targeted group distributes physical resource；

Wherein, the physical resource is that group declares channel resource, or, group declares channel resource and data transmission resources.

4th, method according to claim 1 or 2, it is characterised in that the physical resource of base station distribution is in unactivated state；Methods described also includes： Base station receives the activation request message or the special SR signals of D2D that are used to activate the physical resource of unactivated state for needing the D2D equipment for transmitting data to send；

Base station activation physical resource；

Base station is sent for by the activation response message or the special SR signals of D2D of the activation of the physical resource of unactivated state to needing the D2D equipment for transmitting data；

Wherein, the physical resource is that group declares channel resource, or, group declares channel resource and data transmission resources.

5th, method according to claim 4, it is characterised in that methods described also includes：What the D2D equipment that base station receives end of transmission was sent is used to deactivate request message or the special SR signals of D2D by what the physical resource of state of activation was deactivated；

Base station deactivates physical resource；

Base station is sent for the physical resource deactivation of state of activation to be activated into response message or the special SR signals of D2D to the D2D equipment of end of transmission；

Wherein, the physical resource is that group declares channel resource, or, group declares channel resource and data transmission resources.

6th, method according to claim 2, it is characterised in that the base station is distributed for the targeted group is specially for the data transmission resources of group head and group member's transmission data：

Base station obtains the Qos parameter or parameter group of the targeted group from core network element, and is that the targeted group distributes the data transmission resources according to the Qos parameters or parameter group of the targeted group.

7th, method according to claim 1 or 2, it is characterised in that methods described also includes：The SIB message of the station location marker of the group mark for carrying the targeted group and physical resource is broadcasted in the range of the cellular cell of covering in base station；

Or,

All D2D equipment of base station to the cellular cell for being linked into itself covering send the dedicated signaling of the station location marker of the group mark for carrying the targeted group and physical resource；

Wherein, the physical resource is that group declares channel resource, or, group declares channel resource and/or data transmission resources. 8th, method according to claim 1 or 2, it is characterised in that methods described also includes：Base station receives the group mark that the targeted group is at least carried in the second request message for changing physical resource, second request message and the device identification of described group of head；

Group mark and device identification of the base station in second request message determine the group head of targeted group and targeted group respectively, and change physical resource for the targeted group；

Base station sends the station location marker that the physical resource after changing at least is carried in the second response message for changing physical resource, second response message；

Wherein, the physical resource is that group declares channel resource, or, group declares channel resource and/or data transmission resources.

9th, method according to claim 1 or 2, it is characterised in that methods described also includes：Base station is notified the physical resource that the targeted group currently takes to the base station closed on by X2 interface message；

Wherein, the physical resource is that group declares channel resource, or, group declares channel resource and/or data transmission resources.

10th, method according to claim 8, it is characterised in that

Second request message sends for the group head of the targeted group when the group communication quality for monitoring the targeted group is less than default threshold value；

Or,

Second request message sends for the group head of the targeted group when initiating cell switching.11st, method according to claim 10, it is characterized in that, if second request message sends for the group head of the targeted group when initiating cell switching, second request message is specially the RRC radio reconfiguration complete message in handoff procedure.

12nd, method according to claim 1 or 2, it is characterised in that methods described also includes：Base station is that the targeted group changes physical resource；

The station location marker that the physical resource after changing at least is carried in the control message for changing physical resource, the control message is sent to the group hair of the targeted group in base station；

The confirmation message for the replacing physical resource that the group head that base station receives the targeted group is returned； Wherein, the physical resource is that group declares channel resource, or, group declares channel resource and/or data transmission resources.

13rd, a kind of device for the group head that user's group is set up in D2D communications, it is characterised in that including：First receiving unit, group mark and the device identification of D2D equipment of targeted group are at least carried for receiving in the first request message for being used for that D2D equipment to be set up to the group head as targeted group, first request message；

First allocation unit, the group head of targeted group and targeted group is determined respectively for the group mark in first request message and device identification, and is distributed for the targeted group for group head and declared that the group of information declares channel resource to group member's transmission group；

First transmitting element, sets up D2D equipment for sending the first response message of the group head as the targeted group, and the group mark that the targeted group is at least carried in first response message and described group declare the station location marker of channel resource；

Wherein, the D2D equipment that the device identification is indicated is any one the D2D equipment for the cellular cell for being linked into the base station covering.

14th, device according to claim 13, it is characterised in that described device also includes：Second allocation unit, the data transmission resources of data are transmitted for being distributed for the targeted group for group head and group member；

The station location marker of the data transmission resources is then also carried in first response message, described group is declared that information is used to carry the data transmission resources.

15th, the device according to claim 12 or 13, it is characterised in that described device also includes：Authentication unit, for being that the targeted group distribution group declares channel resource in the first allocation unit, or, it is to verify whether the targeted group legal using core network element and whether the D2D equipment is qualified as the group head of the targeted group before the targeted group distribution group declares that channel resource and the second allocation unit are targeted group distribution data transmission resources in the first allocation unit；Then first allocation unit is specifically for being that channel resource is declared in described group of the targeted group distribution when being verified；

Then second allocation unit is specifically for being that the targeted group distributes the data transmission resources when being verified. 16th, the device according to claim 13 or 14, it is characterised in that the physical resource of base station distribution is in unactivated state；Described device also includes：

Second receiving unit, the activation request message or the special SR signals of D2D that are used to activate the physical resource of unactivated state for needing the D2D equipment for transmitting data to send for receiving；

Unit is activated, for activating physical resource；

Second transmitting element, for needing the D2D equipment for transmitting data to send for by the activation response message or the special SR signals of D2D of the activation of the physical resource of unactivated state；

Wherein, the physical resource is that group declares channel resource, or, group declares channel resource and data transmission resources.

17th, device according to claim 16, it is characterised in that described device also includes：3rd receiving unit, for receiving the deactivation request message or the special SR signals of D2D that are used to deactivate the physical resource of state of activation that the D2D equipment of end of transmission is sent；

Unit is deactivated, for deactivating physical resource；

3rd transmitting element, for needing the D2D equipment for transmitting data to send for by the activation response message or the special SR signals of D2D of the deactivation of the physical resource of state of activation；

Wherein, the physical resource is that group declares channel resource, or, group declares channel resource and data transmission resources.

18th, device according to claim 14, it is characterized in that, second allocation unit specifically for, the Qos parameter or parameter group of the targeted group are obtained from core network element, and is that the targeted group distributes the data transmission resources according to the Qos parameters or parameter group of the targeted group.

19th, the device according to claim 13 or 14, it is characterised in that described device also includes：Radio unit, the SIB message for the station location marker of the group mark physical resource of the broadcast carrying targeted group in the range of the cellular cell of covering；

Or,

Dedicated signaling transmitting element, all D2D equipment for base station to the cellular cell for being linked into itself covering send the dedicated signaling of the station location marker of the group mark for carrying the targeted group and physical resource；Wherein, the physical resource is that group declares channel resource, or, group declares channel resource and/or number According to transfer resource.

20th, the device according to claim 13 or 14, it is characterised in that described device also includes：4th receiving unit, group mark and the device identification of described group of head of the targeted group are at least carried for receiving in the second request message for being used for changing physical resource, second request message；

First changes unit, determines the group head of targeted group and targeted group respectively for the group mark in second request message and device identification, and changes physical resource for the targeted group；4th transmitting element, the station location marker that the physical resource after changing at least is carried in the second response message of physical resource, second response message is changed for sending；

Wherein, the physical resource is that group declares channel resource, or, group declares channel resource and/or data transmission resources.

21st, the device according to claim 13 or 14, it is characterised in that described device also includes：Notification unit, for being notified the physical resource that the targeted group currently takes to the base station closed on by X2 interface message；

Wherein, the physical resource is that group declares channel resource, or, group declares channel resource and/or data transmission resources.

22nd, the device according to claim 13 or 14, it is characterised in that described device also includes：Second changes unit, for changing physical resource for the targeted group；

5th transmitting element, the station location marker that the physical resource after changing at least is carried in the control message of physical resource, the control message is changed for being sent to the group hair of the targeted group；

5th receiving unit, the confirmation message for receiving the replacing physical resource that the group head of the targeted group is returned；

Wherein, the physical resource is that group declares channel resource, or, group declares channel resource and/or data transmission resources.