CN103582077B

CN103582077B - Inter-cell D2D communication method, UE and base station

Info

Publication number: CN103582077B
Application number: CN201210278731.3A
Authority: CN
Inventors: 周晗; 冯淑兰
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2012-08-07
Filing date: 2012-08-07
Publication date: 2017-01-25
Anticipated expiration: 2032-08-07
Also published as: CN103582077A

Abstract

The invention discloses an inter-cell D2D communication method, UE and a base station. The inter-cell D2D communication method includes the following steps that first UE in a first cell obtains information of a second cell. The information of the second cell includes the D2D communication frequency and a cell ID of the second cell; a downlink synchronizing signal of the second cell is searched for by the first UE on the D2D communication frequency of the second cell according to the cell ID of the second cell to obtain downlink timing of the second cell; the first UE determines sending timing of a message sent to the second UE in the second cell according to the downlink timing of the second cell; the first UE sends the message according to the sending timing on the D2D communication frequency of the second cell and receives a message sent by the second UE on the D2D communication frequency of the first cell. By means of the inter-cell D2D communication method, the user equipment and the base station, inter-cell D2D communication can be achieved.

Description

The method of minizone d2d communication, user equipment and base station

Technical field

The present invention relates to the communications field, and more particularly, to the method for minizone d2d communication, user equipment and base Stand.

Background technology

Over nearly 20 years, wireless communication technology obtains huge development, and wireless communication technology is also to emerge in an endless stream.Channel radio Communication network, with the increasing life in occupation of people of its huge motility, becomes indispensable one in people's life Point.

However, radio spectrum resources are limited, increase sharply and to wireless communication networks with the number using cordless communication network The requirement of network performance increasingly improves, and the nervous shortcoming of frequency spectrum resource has become as the key point limiting performance for wireless communications.Mesh Before, Cellular Networks are main cordless communication networks, and in this communication, two terminal communications need to forward through base station, same Individual packet is from terminal to base station, then from base station to terminal, takies interface-free resources twice.If two communication terminal distances are relatively Far, then this project plan comparison is feasible；But if communicating pair is close together, mutually in the communication range of other side, then packet Directly pass through transmission between terminal it is not necessary to forward through base station, the resource of half can be saved.

Direction communication (abbreviation d2d communicates, device to device, device-to-device) between terminal and terminal can Make between terminal unit direction communication without the infrastructure of any centre.Therefore, the direction communication of terminal unit can The utilization frequency spectrum resource of higher efficiency, improves Cellular Networks capacity, reduces the expense of base station control signaling, is an energy to Cellular Networks Communication brings the technology of huge interests.

The frequency spectrum resource that d2d communication can use has two kinds, and one kind is using unauthorized frequency range, and one kind is and cellular communication Common spectrum.Because unauthorized frequency range is very crowded, d2d becomes, with cellular communication common spectrum resource, the main mould that d2d communicates Formula.But how reasonably using cellular frequency spectrum, it is to avoid the interference between d2d communication is communicated with cellular communication and d2d is one Urgent need to resolve key issue.At present, mainly there are two kinds of interference control methods: centralized and distributed.Distributed interference controlling party The main thought of formula is the spectrum utilization situation that terminal unit voluntarily perceives in surrounding, to control transmission power and reception Power, does not go to disturb other equipment also not disturbed by other equipment as far as possible.Centralized interference control mode main Thought is base station according to information such as the transmission power of current frequency spectrum distribution condition and each terminal unit, positions, to distribute The communication spectrum of each terminal unit, to avoid the interference of equipment room.

Respectively be located at two cell edges two ue(user equipment, user equipment) apart from close when, two Very well, at this moment two ue carry out d2d communication and are obtained in that extraordinary communication quality for channel status between ue；Contrary, due to Two ue are far apart from respective serving BS, and the channel quality between two ue and respective serving BS is very poor, signal Decline is very big, now, is not one and have selected well if carrying out cellular communication.But, due to the d2d communication of neighboring interval Frequency is different or frame timing structure difference is it is impossible to realize minizone d2d communication.

Content of the invention

Embodiments provide a kind of method of minizone d2d communication, user equipment and base station, be capable of cell Between d2d communication.

First aspect, there is provided the method for a kind of minizone d2d communication, comprising: the ue in first community obtains the Two cell informations, this second community information includes: the d2d communication frequency of second community and cell ID id；First ue is at this The downlink synchronous signal of this second community is searched for according to cell i d of this second community on the d2d communication frequency of second community, with Obtain the descending timing of this second community；First ue, according to the descending timing of this second community, determines into this second community The 2nd ue send message transmission timing；First ue is sent out with this transmission timing on the d2d communication frequency of this second community Send message, the message that the 2nd ue sends is received on the d2d communication frequency of this first community.

In the first possible implementation, the ue in first community obtains second community information, implements For: a ue receives this second community information that the base station of this first community sends.

In the possible implementation of second, the ue in first community obtains second community information, implements For: a ue receives this second community information that the 3rd ue sends, and the 3rd ue is located at this first community and this second community Collectively cover in region.

In the third possible implementation, the first or second in conjunction with first aspect or first aspect are possible Implementation, a ue sends message with this transmission timing on the d2d communication frequency of this second community, in this first community D2d communication frequency on receive the 2nd ue send message, be implemented as: a ue this second community d2d lead to The equipment sending a ue with this transmission timing in letter frequency finds that signal finds a ue in order to the 2nd ue, at this The equipment receiving the 2nd ue that the 2nd ue sends on the d2d communication frequency of first community finds signal, finds the 2nd ue； First ue sends paging request message with this transmission timing to the 2nd ue on the d2d communication frequency of this second community, The page-response message that 2nd ue sends is received on the d2d communication frequency of this first community；First ue is in this second community D2d communication frequency on this transmission timing to the 2nd ue send data, on the d2d communication frequency of this first community receive The data that 2nd ue sends.

In the 4th kind of possible implementation, the first in conjunction with first aspect or first aspect or second or the 3rd Plant possible implementation, a ue, according to the descending timing of this second community, determines the 2nd ue into this second community Send the transmission timing of message, be implemented as: the descending timing determination of this second community is this transmission timing by a ue.

In the 5th kind of possible implementation, the first in conjunction with first aspect or first aspect or second or the 3rd Kind possible implementation, this second community information also includes: the timing difference δ t of this second community and this first community or should The base station timing t ' of second community_b；First ue, according to the descending timing of this second community, determines into this second community Two ue send the transmission timing of message, are implemented as: a ue is according to equation t=2 (t_b+δt)-t′₂, or t=2t '_b- t′₂, determine this transmission timing t, wherein, t_bFor the base station timing of this first community, t '₂Descending timing for this second community.

In the 6th kind of possible implementation, the second in conjunction with first aspect or the third or the 4th kind or the 5th kind Possible implementation, before a ue receives this second community information that the 3rd ue sends, the method also includes: this One ue is found by equipment, finds the 3rd ue；First ue sends paging request message to the 3rd ue asks this second little Area's information；First ue receives this second community information that the 3rd ue sends, and is implemented as: a ue receives the 3rd ue This second community information being sent by page-response message.

A kind of second aspect, there is provided method of minizone d2d communication, comprising: it is little that the base station of first community obtains second Area's information, this second community information includes: the d2d communication frequency of second community and cell i d；This base station is into this first community A ue send this second community information, in order to a ue on the d2d communication frequency of this second community to this second The 2nd ue in cell sends message.

In the first possible implementation, this second community information also includes: this second community and this first community Timing difference or this second community base station timing.

A kind of third aspect, there is provided method of minizone d2d communication, comprising: common positioned at first community and second community Obtain second community information with the 3rd ue in overlay area, this second community information includes: the d2d communication frequency of this second community Rate and cell i d；3rd ue sends this second community information to the ue in this first community, exists in order to a ue Message is sent to the 2nd ue in this second community on the d2d communication frequency of this second community.

In the possible implementation of second, in conjunction with the first possible realization side of the third aspect or the third aspect Formula, before the 3rd ue sends this second community information to the ue in this first community, the method also includes: the 3rd Ue receives the paging request message of this second community information of request that a ue sends；3rd ue is into this first community First ue sends this second community information, is implemented as: the 3rd ue is sent to a ue by page-response message should Second community information.

Fourth aspect, there is provided a kind of user equipment ue, this ue include: receiver module, for obtaining the of this ue place Second community information outside one cell, this second community information includes: the d2d communication frequency of second community and cell i d；Search Rope module, searches for this second community for cell i d according to this second community on the d2d communication frequency of this second community Downlink synchronous signal, to obtain the descending timing of this second community；Determining module, for descending fixed according to this second community When, determine that the 2nd ue into this second community sends the transmission timing of message；Sending module, in this second community On d2d communication frequency, message is sent with this transmission timing；This receiver module is additionally operable on the d2d communication frequency of this first community Receive the message that the 2nd ue sends.

In the first possible implementation, this receiver module sends specifically for the base station receiving this first community This second community information.

In the possible implementation of second, this receiver module is specifically for receiving this second community that the 3rd ue sends Information, the 3rd ue is located at this first community and this second community collectively covers in region.

In the third possible implementation, the first or second in conjunction with fourth aspect or fourth aspect are possible Implementation, this sending module specifically on the d2d communication frequency of this second community with this transmission timing send this first The equipment of ue finds that signal finds a ue in order to the 2nd ue；With this on the d2d communication frequency of this second community Timing is sent to send paging request message to the 2nd ue；With this transmission timing to this on the d2d communication frequency of this second community 2nd ue sends data；This receiver module sends specifically for receiving the 2nd ue on the d2d communication frequency of this first community The 2nd ue equipment find signal, find the 2nd ue；2nd ue is received on the d2d communication frequency of this first community The page-response message sending；The data that 2nd ue sends is received on the d2d communication frequency of this first community.

In the 4th kind of possible implementation, the first in conjunction with fourth aspect or fourth aspect or second or the 3rd Plant possible implementation, this determining module is specifically for being this transmission timing by the descending timing determination of this second community.

In the 5th kind of possible implementation, the first in conjunction with fourth aspect or fourth aspect or second or the 3rd Kind possible implementation, this second community information also includes: the timing difference δ t of this second community and this first community or should The base station timing t ' of second community_b；This determining module is specifically for according to equation t=2 (t_b+δt)-t′₂, or t=2t '_b-t′₂, Determine this transmission timing t, wherein, t_bFor the base station timing of this first community, t '₂Descending timing for this second community.

In the 6th kind of possible implementation, the second in conjunction with first aspect or the third or the 4th kind or the 5th kind Possible implementation, this receiver module is additionally operable to find by equipment, finds the 3rd ue；This sending module is additionally operable to this 3rd ue sends paging request message and asks this second community information；This receiver module is additionally operable to receive the 3rd ue by paging This second community information that response message sends.

A kind of 5th aspect, there is provided base station, this base station includes: acquisition module, for obtaining the first of this base station place Second community information outside cell, this second community information includes: the d2d communication frequency of second community and cell i d；Send Module, for sending this second community information of this acquisition module acquisition to the ue in this first community, in order to this One ue sends message to the 2nd ue in this second community on the d2d communication frequency of this second community.

6th aspect, there is provided a kind of user equipment ue, this ue include: acquisition module, for when this ue be located at first little When area and second community collectively cover in region, obtain second community information, this second community information includes: this second community D2d communication frequency and cell i d；Sending module, for sending being somebody's turn to do of this acquisition module acquisition to the ue in this first community Second community information, in order to a ue on the d2d communication frequency of this second community to the 2nd ue in this second community Send message.

In the possible implementation of second, in conjunction with the first possible realization side of the 6th aspect or the 6th aspect Formula, this ue also includes: receiver module, and the paging request for receiving this second community information of request that a ue sends disappears Breath；This sending module is additionally operable to send this second community information to a ue by page-response message.

Based on technique scheme, the method for minizone d2d communication of the embodiment of the present invention, ue and base station, by first A ue in cell obtains the d2d communication frequency of second community and cell i d, to the on the d2d communication frequency of second community The 2nd ue in two cells sends message, is capable of minizone d2d communication.

Brief description

In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, will make to required in the embodiment of the present invention below Accompanying drawing be briefly described it should be apparent that, drawings in the following description are only some embodiments of the present invention, for For those of ordinary skill in the art, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings Accompanying drawing.

Fig. 1 is the indicative flowchart of the method for minizone d2d communication according to embodiments of the present invention.

Fig. 2 is the schematic diagram of application scenarios according to embodiments of the present invention.

Fig. 3 is the indicative flowchart of the method for acquisition second community information according to embodiments of the present invention.

Fig. 4 is another indicative flowchart of the method for minizone d2d communication according to embodiments of the present invention.

Fig. 5 is the indicative flowchart of the method for d2d communication in minizone according to another embodiment of the present invention.

Fig. 6 is the indicative flowchart of the method for the minizone d2d communication according to further embodiment of this invention.

Fig. 7 is the indicative flowchart of the process of method of minizone d2d communication according to embodiments of the present invention.

Fig. 8 is the schematic diagram of application scenarios according to another embodiment of the present invention.

Fig. 9 is the indicative flowchart of the process of method of d2d communication in minizone according to another embodiment of the present invention.

Figure 10 is the schematic block diagram of ue according to embodiments of the present invention.

Figure 11 is the schematic block diagram of base station according to embodiments of the present invention.

Figure 12 is the schematic block diagram of ue according to another embodiment of the present invention.

Figure 13 is the schematic block diagram of the ue according to further embodiment of this invention.

Figure 14 is the schematic block diagram of base station according to another embodiment of the present invention.

Figure 15 is the schematic block diagram of the ue according to further embodiment of this invention.

Specific embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Site preparation describes it is clear that described embodiment is a part of embodiment of the present invention, rather than whole embodiments.Based on this Embodiment in bright, the every other reality that those of ordinary skill in the art are obtained on the premise of not making creative work Apply example, all should belong to the scope of protection of the invention.

It should be understood that the technical scheme of the embodiment of the present invention can apply to various communication systems, such as: global system for mobile telecommunications (global system of mobile communication, referred to as " gsm ") system, CDMA (code Division multiple access, referred to as " cdma ") system, WCDMA (wideband code Division multiple access, referred to as " wcdma ") system, GPRS (general packet radio service) (general packet Radio service, referred to as " gprs "), Long Term Evolution (long term evolution, referred to as " lte ") system, lte FDD (frequency division duplex, referred to as " fdd ") system, lte time division duplex (time division Duplex, referred to as " tdd "), UMTS (universal mobile telecommunication System, referred to as " umts "), global interconnection inserting of microwave (worldwide interoperability for Microwave access, referred to as " wimax ") communication system etc..

It should also be understood that in embodiments of the present invention, user equipment (user equipment, referred to as " ue ") can be referred to as Terminal (terminal), mobile station (mobile station, referred to as " ms "), mobile terminal (mobile terminal) etc., This user equipment can be through wireless access network (radio access network, referred to as " ran ") and one or more cores Net is communicated, and for example, user equipment can be mobile phone (or referred to as " honeycomb " phone), have the computer of mobile terminal Deng, for example, user equipment can also be portable, pocket, hand-held, built-in computer or vehicle-mounted mobile device, They exchange voice and/or data with wireless access network.

In embodiments of the present invention, base station can be base station (the base transceiver in gsm or cdma Station, referred to as " bts ") or wcdma in base station (nodeb, referred to as " nb "), can also be in lte Evolved base station (evolutional node b, referred to as " enb or e-nodeb "), the present invention does not limit.But it is description side Just, following embodiments will illustrate taking base station enb and user equipment ue as a example.

Fig. 1 shows the indicative flowchart of the method 100 of minizone d2d communication according to embodiments of the present invention.As Fig. 1 Shown, the method 100 includes:

S110, the ue in first community obtains second community information, and this second community information includes: second community D2d communication frequency and cell i d；

The cell i d search according to this second community should on the d2d communication frequency of this second community for s120, a ue The downlink synchronous signal of second community, to obtain the descending timing of this second community；

S130, a ue, according to the descending timing of this second community, determine that the 2nd ue into this second community sends The transmission timing of message；

S140, a ue send message with this transmission timing on the d2d communication frequency of this second community, this first The message that 2nd ue sends is received on the d2d communication frequency of cell.

Respectively be located at two cell edges two ue apart from close when, this two ue carry out d2d communication be obtained in that non- Often good communication quality.For example, ue1 and ue2 in scene shown in Fig. 2, carries out d2d communication ratio by respective base station between them Carrying out cellular communication can be a preferably selection.In embodiments of the present invention, in order to realize d2d communication, first community An interior ue obtains d2d communication frequency and cell i d of second community first, then on the d2d communication frequency of second community Cell i d according to second community searches for the downlink synchronous signal of second community, obtains the descending timing of second community, further according to The descending timing of second community, determines the transmission timing sending message to the 2nd ue in second community, finally, in second community D2d communication frequency on message is sent with this transmission timing, and the 2nd ue received on the d2d communication frequency of first community send Message, the equipment and the 2nd ue between of realizing finds, paging and communication.

Therefore, the method for the minizone d2d communication of the embodiment of the present invention, by obtaining the d2d communication frequency of second community With cell i d, the d2d communication frequency of second community sends message to the 2nd ue in second community, is capable of minizone D2d communicates.

It should be understood that during a ue and the 2nd ue carries out d2d communication, the various operation phases of a ue and the 2nd ue Same or corresponding, therefore, the various operations of the 2nd ue may refer to a ue, for sake of simplicity, the embodiment of the present invention is to the 2nd ue's Various operations are not described in detail.

In embodiments of the present invention, the second community information that a ue obtains represents that a ue and the 2nd ue carries out d2d and leads to The relevant information of required second community during letter, in addition to the d2d communication frequency of second community and cell i d, according to minizone Difference, second community information can also include timing information or d2d frame structure etc..

In s110, the ue in first community obtains second community information, and this second community information includes: second is little The d2d communication frequency in area and cell i d.

Because first community is different with the d2d of second community communication configuration, a ue and the 2nd ue cannot directly carry out d2d Communication, therefore, a ue and the 2nd ue will obtain the information of other side's cell first, include other side's cell d2d communication frequency with Cell i d.Acquisition modes can be to be obtained by respective base station, or by collectively covering positioned at first community and second community The 3rd ue in region obtains.Therefore, as shown in figure 3, alternatively, s110 includes:

S111, a ue receive this second community information that the base station of this first community sends.

First ue receives second community information from the base station of the first community being located.For example, a ue passes through first community The system broadcast message that sends of base station obtain the d2d communication frequency of second community and cell i d.Similarly, the 2nd ue passes through the The system broadcast message that the base station of two cells sends obtains d2d communication frequency and cell i d of first community.

As shown in figure 3, alternatively, s110 includes:

S112, the first ue receive the 3rd ue send this second community information, the 3rd ue be located at this first community and This second community collectively covers in region.

First ue receives second community information from the 3rd ue.Alternatively, before s112, the method 100 also includes:

First ue is found by equipment, finds the 3rd ue；

First ue sends paging request message to the 3rd ue and asks this second community information；

S112 includes:

First ue receives this second community information that the 3rd ue is sent by page-response message.

For example, a ue is found it is known that the 3rd ue does d2d communication in first community and second community simultaneously by equipment, Then a ue passes through paging request message to the 3rd ue request second community information, including the d2d communication frequency of second community With cell i d.After 3rd ue receives the paging request message of a ue, send page-response message to a ue, carry second little Area's information, the d2d communication frequency including second community and cell i d.Similarly, the 2nd ue disappears also by the paging with the 3rd ue Breath obtains d2d communication frequency and cell i d of first community.

In s120, ue cell i d according to this second community on the d2d communication frequency of this second community is searched The downlink synchronous signal of this second community of rope, obtains the descending timing of this second community.

After the d2d communication frequency obtaining second community and cell i d, a ue is in the d2d communication frequency of second community The downlink synchronous signal of upper search second community, obtains the descending timing of second community.

In s130, a ue, according to the descending timing of this second community, determines the 2nd ue into this second community Send the transmission timing of message.

After the descending timing obtaining second community, a ue, further according to the descending timing of second community, determines to The 2nd ue in two cells sends the transmission timing of message.

Alternatively, s130 includes:

The descending timing determination of this second community is this transmission timing by the first ue.

That is, the descending timing determination of second community is to send message to the 2nd ue in second community by a ue Transmission timing.

Alternatively, this second community information also includes: the timing difference δ t of this second community and this first community or this The base station timing t ' of two cells_b；

S130 includes:

First ue is according to equation t=2 (t_b+δt)-t′₂, or t=2t '_b-t′₂, determine this transmission timing t,

Wherein, t_bFor the base station timing of this first community, t '₂Descending timing for this second community.

Specifically, the second community information that a ue obtains includes the d2d communication frequency of second community, cell i d and the Two cells and the timing difference δ t of first community；First ue searches for the descending of second community on the d2d communication frequency of second community Synchronizing signal, obtains the descending timing t ' of second community₂；According to t=2 (t_b+δt)-t′₂Calculate to the 2nd ue in second community Send the transmission timing t of message.

Or, it is little that the second community information that a ue obtains includes the d2d communication frequency of second community, cell i d and second The base station timing t ' in area_b；First ue searches for the downlink synchronous signal of second community on the d2d communication frequency of second community, obtains Obtain the descending timing t ' of second community₂；According to t=2t '_b-t′₂Calculate the transmission sending message to the 2nd ue in second community to determine When t.

In s140, a ue sends message with this transmission timing on the d2d communication frequency of this second community, at this The message that 2nd ue sends is received on the d2d communication frequency of first community.

Send the transmission timing of message in the d2d communication frequency having obtained second community with to the 2nd ue in second community Afterwards, a ue sends message, and the d2d communication in first community with this transmission timing on the d2d communication frequency of second community The message that 2nd ue sends is received on frequency, realizes equipment discovery, paging and communication and the 2nd ue between.

As shown in figure 4, alternatively, s140 includes:

S141, a ue sends setting of a ue with this transmission timing on the d2d communication frequency of this second community The existing signal of preparation finds a ue in order to the 2nd ue, receives the 2nd ue on the d2d communication frequency of this first community The equipment of the 2nd ue sending finds signal, finds the 2nd ue；

S142, a ue are sent to the 2nd ue with this transmission timing on the d2d communication frequency of this second community and seek Exhale request message, the page-response message that the 2nd ue sends is received on the d2d communication frequency of this first community；

S143, a ue send number with this transmission timing to the 2nd ue on the d2d communication frequency of this second community According to, the d2d communication frequency of this first community receives the 2nd ue send data.

Specifically, in order that the 2nd ue in second community is it can be found that oneself, a ue leads in the d2d of second community Send, with determine, the equipment discovery signal that timing sends a ue in letter frequency.2nd ue communicates in the d2d of second community In frequency, receiving device finds signal, and therefore, the 2nd ue is it can be found that a ue.Similarly, a ue is in the d2d of first community Also the 2nd ue can be received on communication frequency, and on the d2d communication frequency of first community, with sending of determining, timing sends the The equipment of two ue finds signal, thus finding the 2nd ue.

After first ue and the 2nd ue mutually finds, when a ue wants to communicate with the 2nd ue, a ue is just in second community D2d communication frequency on paging request message is sent to the 2nd ue with the transmission timing that determines.2nd ue is in second community This paging request message is received on d2d communication frequency, then on the d2d communication frequency of first community, sends paging to a ue Response message.

After first ue and the 2nd ue completes paging, set up communication link and start data communication.The frequency of data communication is to connect The d2d communication frequency of debit.I.e. a ue sends data to the 2nd ue on the d2d communication frequency of second community, little first The data that 2nd ue sends is received on the d2d communication frequency in area.

So, the method for the minizone d2d communication of the embodiment of the present invention, little second by the ue in first community Send message to the 2nd ue in second community on the d2d communication frequency in area, the d2d communication frequency of first community receives the The message that two ue send, is capable of minizone d2d communication.

Above in conjunction with Fig. 1 to Fig. 4, the method describing minizone d2d communication in detail from the angle of a ue, below will In conjunction with Fig. 5 and Fig. 6, the method describing minizone d2d communication from the angle of base station and the 3rd ue.

Fig. 5 shows the indicative flowchart of the method 200 of minizone d2d communication according to embodiments of the present invention.As Fig. 5 Shown, the method 200 includes:

S210, the base station of first community obtains second community information, and this second community information includes: the equipment of second community To equipment d2d communication frequency and cell i d；

S220, this base station sends this second community information to the first user equipment ue in this first community, in order to this First ue sends message to the 2nd ue in this second community on the d2d communication frequency of this second community.

Communicate to realize the d2d between first community and second community, the base station of first community is in first community One ue sends d2d communication frequency and cell i d of second community, and so, a ue is capable of the d2d communication in second community Message is sent to the 2nd ue, thus realizing equipment discovery, paging and communication and the 2nd ue between in frequency.

Therefore, the method for the minizone d2d communication of the embodiment of the present invention, by the base station of first community into first community The first ue send second community information, be capable of minizone d2d communication.

When the base station of first community sends d2d communication frequency and cell i d of second community to a ue, a ue exists The downlink synchronous signal of second community is searched on the d2d communication frequency of second community, obtains the descending timing of second community, by the The descending timing of two cells is as the transmission timing sending message to the 2nd ue in second community.

Alternatively, this second community information also includes: the timing difference of this second community and this first community or this second The base station timing of cell.

The base station of first community to a ue send the d2d communication frequency of second community, cell i d and second community with During the timing difference δ t of first community, a ue searches for the down-going synchronous letter of second community on the d2d communication frequency of second community Number, obtain the descending timing t ' of second community₂, according to t=2 (t_b+δt)-t′₂Calculate to send to the 2nd ue in second community and disappear The transmission timing t of breath.

Send the d2d communication frequency of second community, cell i d and second community in the base station of first community to a ue Base station timing t '_bWhen, a ue searches for the downlink synchronous signal of second community on the d2d communication frequency of second community, obtains The descending timing t ' of second community₂, according to t=2t '_b-t′₂Calculate the transmission timing sending message to the 2nd ue in second community t.

Fig. 6 shows the indicative flowchart of the method 300 of minizone d2d communication according to embodiments of the present invention.As Fig. 6 Shown, the method 300 includes:

S310, the 3rd ue collectively covering positioned at first community and second community in region obtains second community information, should Second community information includes: the d2d communication frequency of this second community and cell i d；

S320, the 3rd ue send this second community information to the first user equipment ue in this first community, in order to First ue sends message to the 2nd ue in this second community on the d2d communication frequency of this second community.

Communicate to realize the d2d between first community and second community, collectively cover positioned at first community and second community The 3rd ue in region sends d2d communication frequency and cell i d of second community, so, first to the ue in first community Ue is capable of sending message to the 2nd ue on the d2d communication frequency of second community, thus realizing setting and the 2nd ue between Preparation is existing, paging and communication.

Therefore, the method for the minizone d2d communication of the embodiment of the present invention, by common positioned at first community and second community The 3rd ue in overlay area sends second community information to the ue in first community, is capable of minizone d2d communication.

First ue determines the transmission timing to the 2nd ue transmission message in second community according to this second community information Mode refers to previous embodiment, for sake of simplicity, will not be described here.

Alternatively, before s320, the method 300 also includes:

3rd ue receives the paging request message of this second community information of request that a ue sends；

S320 includes:

3rd ue sends this second community information to a ue by page-response message.

That is, after the 3rd ue receives the paging request message that a ue asks second community information, by paging Response message sends second community information to a ue.

Describe the embodiment of the present invention below in conjunction with specific example in detail.It should be noted that these examples are intended merely to help Those skilled in the art more fully understand the embodiment of the present invention, and the scope of the unrestricted embodiment of the present invention.

Fig. 7 is the indicative flowchart of the process of method of minizone d2d communication according to embodiments of the present invention.Fig. 7 pair The scene graph answered is as shown in Fig. 2 be described in detail to Fig. 7 with reference to the scene of Fig. 2.

In fig. 2, the d2d frequency of the ue1 work in cell 1 is the f under enb1₁；The d2d frequency of the ue2 work in cell 2 Rate is the f under enb2₂.As shown in fig. 7, the process that ue1 and ue2 carries out d2d communication is as follows.

701, ue1 receive cell 2 information from enb1.Ue1 from enb1 the frequency of oneself be f₁D2d cell 1 on receive The relevant information of the d2d cell 2 of neighbours enb2, including the d2d communication frequency f of cell 2₂With cell i d, or also include cell 2 With the timing difference δ t of cell 1 or the base station timing t ' of cell 2_bOr d2d frame structure etc..

702, ue2 receive cell 1 information from enb2.Ue2 from enb2 the frequency of oneself be f₂D2d cell 2 on receive The relevant information of the d2d cell 1 of neighbours enb1, including the d2d communication frequency f of cell 1₁With cell i d, or also include cell 1 With the timing difference of cell 2 or the base station timing of cell 1 or d2d frame structure etc..

The downlink synchronous signal of 703, ue1 search cells 2.Ue1 is in frequency f₂On cell is searched for according to cell i d of cell 2 2 downlink synchronous signal, obtains the descending timing t ' of cell 2₂.

704, ue1 determine transmission timing.Ue1 is according to the descending timing t ' of cell 2₂Really the ue in directional cell 2 sends and disappears The transmission timing t of breath.For example, concrete determination mode can be: t=t '₂, or, t=2 (t_b+δt)-t′₂, or, t=2t '_b- t′2.

The downlink synchronous signal of 705, ue2 search cells 1.Ue2 is in frequency f₁On cell is searched for according to cell i d of cell 1 1 downlink synchronous signal, obtains the descending timing of cell 1.

706, ue2 determine transmission timing.Ue2 sends message according to the descending timing determination of cell 1 to the ue in cell 1 Send timing.Concrete determination mode can be found in ue1.

707, ue1 send equipment finds signal.Ue1 is in frequency f of neighbours' d2d cell 2₂On with step 704 determine Send timing and send the equipment discovery signal of oneself.Ue2 is still in d2d frequency f of oneself simultaneously₂Upper receiving device finds letter Number, now, ue2 is just it can be found that ue1.

708, ue2 send equipment finds signal.Ue2 is in frequency f of neighbours' d2d cell 1₁On with step 706 determine Send timing and send the equipment discovery signal of oneself.Ue1 is still in d2d frequency f of oneself simultaneously₁Upper receiving device finds letter Number, now, ue1 is just it can be found that ue2.

709, ue1 to ue2 transmission paging request message.After ue1 and ue2 mutually finds, if ue1 wants to communicate with ue2, that Ue1 is just in frequency f₂On to ue2 send paging request message.Ue2 receives beep-page message still in the frequency of oneself, this When, ue2 can receive the paging request message of ue1.

710, ue2 to ue1 transmission page-response message.Ue2 after receiving the paging request message of ue1, in frequency f₁On Send out page-response message to ue1.Ue1 receives page-response message still in the frequency of oneself, and now, ue1 can receive ue2 Page-response message.

711, ue1 start to communicate with ue2.Ue1 and ue2, after completing paging, sets up communication link and starts data communication.Number It is the d2d frequency of recipient according to the frequency communicating, that is, ue1 is in frequency f₂On to ue2 send data；Ue2 is in frequency f₁On to ue1 Send data.

Fig. 9 is the indicative flowchart of the process of method of d2d communication in minizone according to another embodiment of the present invention.Figure 9 corresponding scene graph are as shown in figure 8, be described in detail to Fig. 9 with reference to the scene of Fig. 8.

In fig. 8, the d2d frequency of the ue1 work in cell 1 is the f under enb1₁；The d2d frequency of the ue2 work in cell 2 Rate is the f under enb2₂；Ue3 is located at the edge of d2d cell 1 and d2d cell 2, can be in f₁And f₂D2d is carried out on two frequencies lead to Letter.As shown in figure 9, the process that ue1 and ue2 carries out d2d communication is as follows.

901, ue1 to ue3 transmission paging request message.Ue1 is found by equipment it is known that ue3 is simultaneously in d2d cell 1 He D2d cell 2 does d2d communication.Ue1 passes through the relevant information that paging request message asks neighbours' d2d cell 2 to ue3, including cell 2 d2d communication frequency and cell i d, or also include cell 2 and the timing difference of cell 1 or the base station timing of cell 2 or d2d frame Structure etc..

902, ue3 to ue1 transmission page-response message.After ue3 receives the paging request message of ue1, send paging to ue1 Response message carries the relevant information of cell 2, including the d2d communication frequency f of cell 2₂With cell i d, or also include cell 2 With the timing difference δ t of cell 1 or the base station timing t ' of cell 2_bOr d2d frame structure etc..

903, ue2 to ue3 transmission paging request message.Ue2 is found by equipment it is known that ue3 is simultaneously in d2d cell 1 He D2d cell 2 does d2d communication.Ue2 passes through the relevant information that paging request message asks neighbours' d2d cell 1 to ue3, including cell 1 d2d communication frequency and cell i d, or also include cell 1 and the timing difference of cell 2 or the base station timing of cell 1 or d2d frame Structure etc..

904, ue3 to ue2 transmission page-response message.After ue3 receives the paging request message of ue2, send paging to ue2 Response message carries the relevant information of cell 1, including the d2d communication frequency f of cell 1₁With cell i d, or also include cell 1 With the timing difference of cell 2 or the base station timing of cell 1 or d2d frame structure etc..

The downlink synchronous signal of 905, ue1 search cells 2.Ue1 is in frequency f₂On cell is searched for according to cell i d of cell 2 2 downlink synchronous signal, obtains the descending timing t ' of cell 2₂.

906, ue1 determine transmission timing.Ue1 is according to the descending timing t ' of cell 2₂Really the ue in directional cell 2 sends and disappears The transmission timing t of breath.For example, concrete determination mode can be: t=t '₂, or, t=2 (t_b+δt)-t′₂, or, t=2t '_b- t′₂.

The downlink synchronous signal of 907, ue2 search cells 1.Ue2 is in frequency f₁On cell is searched for according to cell i d of cell 1 1 downlink synchronous signal, obtains the descending timing of cell 1.

908, ue2 determine transmission timing.Ue2 sends message according to the descending timing determination of cell 1 to the ue in cell 1 Send timing.Concrete determination mode can be found in ue1.

909, ue1 send equipment finds signal.Ue1 is in frequency f of neighbours' d2d cell 2₂On with step 704 determine Send timing and send the equipment discovery signal of oneself.Ue2 is still in d2d frequency f of oneself simultaneously₂Upper receiving device finds letter Number, now, ue2 is just it can be found that ue1.

910, ue2 send equipment finds signal.Ue2 is in frequency f of neighbours' d2d cell 1₁On with step 706 determine Send timing and send the equipment discovery signal of oneself.Ue1 is still in d2d frequency f of oneself simultaneously₁Upper receiving device finds letter Number, now, ue1 is just it can be found that ue2.

911, ue1 to ue2 transmission paging request message.Ue1 is after mutually finding with ue2, if ue1 wants to communicate with ue2, So ue1 is just in frequency f₂On to ue2 send paging request message.Ue2 receives beep-page message still in the frequency of oneself, this When, ue2 can receive the paging request message of ue1.

912, ue2 to ue1 transmission page-response message.Ue2 after receiving the paging request message of ue1, in frequency f₁On Send out page-response message to ue1.Ue1 receives page-response message still in the frequency of oneself, and now, ue1 can receive ue2 Page-response message.

913, ue1 start to communicate with ue2.Ue1 and ue2, after completing paging, sets up communication link and starts data communication.Number It is the d2d frequency of recipient according to the frequency communicating, that is, ue1 is in frequency f₂On to ue2 send data；Ue2 is in frequency f₁On to ue1 Send data.

Therefore, the method for the minizone d2d communication of the embodiment of the present invention, by sending number in the d2d frequency of recipient According to, be capable of minizone d2d communication.

Above in conjunction with Fig. 1 to Fig. 9, describe the method that minizone d2d according to embodiments of the present invention communicates in detail, under Face will describe ue according to embodiments of the present invention and base station in conjunction with Figure 10 to Figure 15.

Figure 10 shows the schematic block diagram of ue400 according to embodiments of the present invention.As shown in Figure 10, this ue400 includes:

Receiver module 410, for obtain this ue place first community outside second community information, this second community believe Breath includes: the device-to-device d2d communication frequency of second community and cell i d；

Search module 420, searches for for cell i d according to this second community on the d2d communication frequency of this second community The downlink synchronous signal of this second community, to obtain the descending timing of this second community；

Determining module 430, for the descending timing according to this second community, determines that the 2nd ue into this second community sends out Send the transmission timing of message；

Sending module 440, for sending message with this transmission timing on the d2d communication frequency of this second community；

This receiver module 410 is additionally operable to receive the message that the 2nd ue sends on the d2d communication frequency of this first community.

The ue of the embodiment of the present invention, by obtaining d2d communication frequency and cell i d of second community, in second community Send message to the 2nd ue in second community on d2d communication frequency, be capable of minizone d2d communication.

In embodiments of the present invention, alternatively, this receiver module 410 sends specifically for the base station receiving this first community This second community information.

Alternatively, this receiver module 410 is specifically for receiving this second community information that the 3rd ue sends, the 3rd ue position Collectively cover in region in this first community and this second community.

In embodiments of the present invention, alternatively, this sending module 440 communicates frequently specifically for the d2d in this second community The equipment sending a ue with this transmission timing in rate finds that signal finds a ue in order to the 2nd ue；

This receiver module 410 is specifically for receiving being somebody's turn to do of the 2nd ue transmission on the d2d communication frequency of this first community The equipment of the 2nd ue finds signal, finds the 2nd ue；

This sending module 440 specifically on the d2d communication frequency of this second community with this transmission timing to this second Ue sends paging request message；

This receiver module 410 is specifically for receiving seeking of the 2nd ue transmission on the d2d communication frequency of this first community Exhale response message；

This sending module also 440 specifically on the d2d communication frequency of this second community with this transmission timing to this Two ue send data；

This receiver module 410 is specifically for receiving the number that the 2nd ue sends on the d2d communication frequency of this first community According to.

In embodiments of the present invention, alternatively, this determining module 430 is specifically for will be true for the descending timing of this second community It is set to this transmission timing.

In embodiments of the present invention, alternatively, this second community information also includes: this second community and this first community Timing difference δ t or the base station timing t ' of this second community_b；

This determining module 430 is specifically for according to equation t=2 (t_b+δt)-t′₂, or t=2t '_b-t′₂, determine this transmission Timing t,

In embodiments of the present invention, alternatively, this receiver module 410 is additionally operable to find by equipment, finds the 3rd ue；

This sending module 440 is additionally operable to ask this second community information to the 3rd ue transmission paging request message；

This receiver module 410 is additionally operable to receive this second community information that the 3rd ue is sent by page-response message.

The method that ue400 according to embodiments of the present invention may correspond to d2d communication in minizone according to embodiments of the present invention In a ue, and above and other operation of the modules in ue400 and/or function are respectively in order to realize Fig. 1 to Fig. 9 In each method corresponding flow process, for sake of simplicity, will not be described here.

The ue of the embodiment of the present invention, by sending out to the 2nd ue in second community on the d2d communication frequency of second community Send message, the d2d communication frequency of first community receives the message that the 2nd ue sends, be capable of minizone d2d communication.

Figure 11 shows the schematic block diagram of base station 500 according to embodiments of the present invention.As shown in figure 11, this base station 500 Including:

Acquisition module 510, for obtain this base station place first community outside second community information, this second community Information includes: the device-to-device d2d communication frequency of second community and cell i d；

Sending module 520, for sending the acquisition of this acquisition module 510 to the first user equipment ue in this first community This second community information, in order to a ue on the d2d communication frequency of this second community to second in this second community Ue sends message.

The base station of the embodiment of the present invention, by sending second community information to the ue in first community, is capable of Minizone d2d communicates.

Base station 500 according to embodiments of the present invention may correspond to the side of d2d communication in minizone according to embodiments of the present invention Above and other operation of the modules in the base station in method, and base station 500 and/or function are respectively in order to realize Fig. 1 extremely The corresponding flow process of each method in Fig. 9, for sake of simplicity, will not be described here.

Figure 12 shows the schematic block diagram of ue600 according to another embodiment of the present invention.As shown in figure 12, this ue600 Including:

Acquisition module 610, for when this ue is located at first community and second community collectively covers in region, obtaining second Cell information, this second community information includes: the device-to-device d2d communication frequency of this second community and cell i d；

Sending module 620, for the ue in this first community send the acquisition of this acquisition module 610 this is second little Area's information, sends to the 2nd ue in this second community on the d2d communication frequency of this second community in order to a ue and disappears Breath.

The ue of the embodiment of the present invention, by sending second community information to the ue in first community, is capable of little Interval d2d communication.

As shown in figure 12, alternatively, this ue600 also includes:

Receiver module 630, for receiving the paging request message of this second community information of request that a ue sends；

This sending module 620 is additionally operable to send this second community information to a ue by page-response message.

The method that ue600 according to embodiments of the present invention may correspond to d2d communication in minizone according to embodiments of the present invention In the 3rd ue, and above and other operation of the modules in ue600 and/or function are respectively in order to realize Fig. 1 to Fig. 9 In each method corresponding flow process, for sake of simplicity, will not be described here.

Figure 13 shows the schematic block diagram of the ue1300 according to further embodiment of this invention.As shown in figure 13, should Ue1300 includes:

Receptor 1310, for obtain this ue place first community outside second community information, this second community believe Breath includes: the device-to-device d2d communication frequency of second community and cell i d；

Processor 1320, searches for for cell i d according to this second community on the d2d communication frequency of this second community The downlink synchronous signal of this second community is to obtain the descending timing of this second community and descending fixed according to this second community When, determine that the 2nd ue into this second community sends the transmission timing of message；

Transmitter 1330, for sending message with this transmission timing on the d2d communication frequency of this second community；

This receptor 1310 is additionally operable to receive the message that the 2nd ue sends on the d2d communication frequency of this first community.

Alternatively, this second community information that this receptor 1310 sends specifically for the base station receiving this first community.

Alternatively, this receptor 1310 is specifically for receiving this second community information that the 3rd ue sends, the 3rd ue position Collectively cover in region in this first community and this second community.

Alternatively, this transmitter 1330 is specifically for being sent out with this transmission timing on the d2d communication frequency of this second community The equipment sending a ue finds that signal finds a ue in order to the 2nd ue；

This receptor 1310 specifically for receive that the 2nd ue sends on the d2d communication frequency of this first community this The equipment of two ue finds signal, finds the 2nd ue；

This transmitter 1330 specifically on the d2d communication frequency of this second community with this transmission timing to the 2nd ue Send paging request message；

This receptor 1310 is specifically for receiving the paging that the 2nd ue sends on the d2d communication frequency of this first community Response message；

This transmitter 1330 specifically on the d2d communication frequency of this second community with this transmission timing to the 2nd ue Send data；

This receptor 1310 is specifically for receiving the number that the 2nd ue sends on the d2d communication frequency of this first community According to.

Alternatively, this processor 1320 is specifically for being this transmission timing by the descending timing determination of this second community.

This processor 1320 is specifically for according to equation t=2 (t_b+δt)-t′₂, or t=2t '_b-t′₂, determine this transmission Timing t,

Alternatively, this receptor 1310 is additionally operable to find by equipment, finds the 3rd ue；

This transmitter 1330 is additionally operable to ask this second community information to the 3rd ue transmission paging request message；

This receptor 1310 is additionally operable to receive this second community information that the 3rd ue is sent by page-response message.

The method that ue1300 according to embodiments of the present invention may correspond to d2d communication in minizone according to embodiments of the present invention In a ue, and above and other operation of the modules in ue1300 and/or function respectively in order to realize Fig. 1 to scheme The corresponding flow process of each method in 9, for sake of simplicity, will not be described here.

Figure 14 shows the schematic block diagram of base station 1400 according to another embodiment of the present invention.As shown in figure 14, this base Stand and 1400 include:

Processor 1410, for obtain this base station place first community outside second community information, this second community Information includes: the device-to-device d2d communication frequency of second community and cell i d；

Transmitter 1420, for sending this second community information to the first user equipment ue in this first community, so that Send message in a ue to the 2nd ue in this second community on the d2d communication frequency of this second community.

Base station 1400 according to embodiments of the present invention may correspond to the side of d2d communication in minizone according to embodiments of the present invention Above and other operation of the modules in the base station in method, and base station 1400 and/or function are respectively in order to realize Fig. 1 extremely The corresponding flow process of each method in Fig. 9, for sake of simplicity, will not be described here.

Figure 15 shows the schematic block diagram of the ue1500 according to further embodiment of this invention.As shown in figure 15, should Ue1500 includes:

Processor 1510, for when this ue is located at first community and second community collectively covers in region, obtaining second Cell information, this second community information includes: the device-to-device d2d communication frequency of this second community and cell i d；

Transmitter 1520, for sending this second community information to the ue in this first community, in order to this first Ue sends message to the 2nd ue in this second community on the d2d communication frequency of this second community.

As shown in figure 15, alternatively, this ue1500 also includes:

Receptor 1530, for receiving the paging request message of this second community information of request that a ue sends；

This transmitter 1520 is additionally operable to send this second community information to a ue by page-response message.

The method that ue1500 according to embodiments of the present invention may correspond to d2d communication in minizone according to embodiments of the present invention In the 3rd ue, and above and other operation of the modules in ue1500 and/or function respectively in order to realize Fig. 1 to scheme The corresponding flow process of each method in 9, for sake of simplicity, will not be described here.

It should be understood that in embodiments of the present invention, term "and/or" is only a kind of incidence relation of description affiliated partner, Represent there may be three kinds of relations.For example, a and/or b, can represent: individualism a, there is a and b simultaneously, individualism b this Three kinds of situations.In addition, character "/" herein, typically represent forward-backward correlation to as if a kind of relation of "or".

Those of ordinary skill in the art are it is to be appreciated that combine the list of each example of the embodiments described herein description Unit and algorithm steps, can be with electronic hardware, computer software or the two be implemented in combination in, in order to clearly demonstrate hardware With the interchangeability of software, generally describe composition and the step of each example in the above description according to function.This A little functions to be executed with hardware or software mode actually, the application-specific depending on technical scheme and design constraint.Specially Industry technical staff can use different methods to each specific application realize described function, but this realization is not It is considered as beyond the scope of this invention.

Those skilled in the art can be understood that, for convenience of description and succinctly, foregoing description be The specific work process of system, device and unit, may be referred to the corresponding process in preceding method embodiment, will not be described here.

It should be understood that disclosed system, apparatus and method in several embodiments provided herein, permissible Realize by another way.For example, device embodiment described above is only schematically, for example, described unit Divide, only a kind of division of logic function, actual can have other dividing mode when realizing, for example multiple units or assembly Can in conjunction with or be desirably integrated into another system, or some features can be ignored, or does not execute.In addition, it is shown or beg for By coupling each other or direct-coupling or communication connection can be INDIRECT COUPLING by some interfaces, device or unit Or communication connection or electricity, machinery or other forms connect.

The described unit illustrating as separating component can be or may not be physically separate, show as unit The part showing can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple On NE.Some or all of unit therein can be selected according to the actual needs to realize embodiment of the present invention scheme Purpose.

In addition, can be integrated in a processing unit in each functional unit in each embodiment of the present invention it is also possible to It is that unit is individually physically present or two or more units are integrated in a unit.Above-mentioned integrated Unit both can be to be realized in the form of hardware, it would however also be possible to employ the form of SFU software functional unit is realized.

If described integrated unit is realized and as independent production marketing or use using in the form of SFU software functional unit When, can be stored in a computer read/write memory medium.Based on such understanding, technical scheme is substantially The part in other words prior art being contributed, or all or part of this technical scheme can be in the form of software product Embody, this computer software product is stored in a storage medium, including some instructions with so that a computer Equipment (can be personal computer, server, or network equipment etc.) executes the complete of each embodiment methods described of the present invention Portion or part steps.And aforesaid storage medium includes: u disk, portable hard drive, read only memory (rom, read-only Memory), random access memory (ram, random access memory), magnetic disc or CD etc. are various can store journey The medium of sequence code.

The above, the only specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, and any Those familiar with the art the invention discloses technical scope in, various equivalent modifications can be readily occurred in or replace Change, these modifications or replacement all should be included within the scope of the present invention.Therefore, protection scope of the present invention should be with right The protection domain requiring is defined.

Claims

1. a kind of method of minizone device-to-device d2d communication is it is characterised in that include:

First user equipment ue in first community obtains second community information, and described second community information includes: second community D2d communication frequency and cell ID id；

A described ue is on the d2d communication frequency of described second community according to cell i d of described second community search described the The downlink synchronous signal of two cells, to obtain the descending timing of described second community；

A described ue, according to the descending timing of described second community, determines and sends message to the 2nd ue in described second community Transmission timing；

A described ue sends timing transmission message with described on the d2d communication frequency of described second community, described first The message that described 2nd ue sends is received on the d2d communication frequency of cell.

Described second community information also includes: the timing difference δ t or described second of described second community and described first community The base station timing t ' of cell_b；

A described ue, according to the descending timing of described second community, determines and sends message to the 2nd ue in described second community Transmission timing, comprising:

A described ue is according to equation t=2 (t_b+δt)-t′₂, or t=2t '_b-t′₂, determine described transmission timing t,

Wherein, t_bFor the base station timing of described first community, t '₂Descending timing for described second community.

2. method according to claim 1 is it is characterised in that first user equipment ue in described first community obtains the Two cell informations, comprising:

A described ue receives the described second community information that the base station of described first community sends.

3. method according to claim 1 is it is characterised in that first user equipment ue in described first community obtains the Two cell informations, comprising:

A described ue receives the described second community information that the 3rd ue sends, and described 3rd ue is located at described first community and institute State second community to collectively cover in region.

4. method according to claim 1 is it is characterised in that a described ue communicates frequently in the d2d of described second community Send timing transmission message with described in rate, the d2d communication frequency of described first community receives what described 2nd ue sent Message, comprising:

A described ue sends, with described, the equipment that timing sends a described ue on the d2d communication frequency of described second community Find that signal finds a described ue in order to described 2nd ue, the d2d communication frequency of described first community receives described The equipment of described 2nd ue that the 2nd ue sends finds signal, finds described 2nd ue；

A described ue sends timing to described 2nd ue transmission paging with described on the d2d communication frequency of described second community Request message, receives the page-response message that described 2nd ue sends on the d2d communication frequency of described first community；

A described ue sends timing to described 2nd ue transmission number with described on the d2d communication frequency of described second community According to, the d2d communication frequency of described first community receives described 2nd ue send data.

5. method according to claim 3 it is characterised in that receive described the second of the 3rd ue transmission in a described ue Before cell information, methods described also includes:

A described ue is found by equipment, finds described 3rd ue；

A described ue sends paging request message to described 3rd ue and asks described second community information；

A described ue receives the described second community information that the 3rd ue sends, comprising:

A described ue receives the described second community information that described 3rd ue is sent by page-response message.

6. a kind of user equipment ue is it is characterised in that described ue includes:

Receiver module, for obtaining the second community information outside the first community that described ue is located, described second community information Including: the device-to-device d2d communication frequency of second community and cell ID id；

Search module, searches for institute for cell i d according to described second community on the d2d communication frequency of described second community State the downlink synchronous signal of second community, to obtain the descending timing of described second community；

Determining module, for the descending timing according to described second community, determines and sends to the 2nd ue in described second community The transmission timing of message；

Sending module, for sending timing transmission message with described on the d2d communication frequency of described second community；

Described receiver module is additionally operable to receive the message that described 2nd ue sends on the d2d communication frequency of described first community.

Described determining module is specifically for according to equation t=2 (t_b+δt)-t′₂, or t=2t '_b-t′₂, determine that described transmission is determined When t,

7. ue according to claim 6 is it is characterised in that described receiver module is specifically for receiving described first community Base station send described second community information.

8. ue according to claim 6 is it is characterised in that described receiver module is specifically for receiving the institute that the 3rd ue sends State second community information, described 3rd ue is located at described first community and described second community collectively covers in region.

9. ue according to claim 6 is it is characterised in that described sending module is specifically in described second community With the described equipment discovery signal regularly sending a described ue that sends in order to described 2nd ue discovery institute on d2d communication frequency State a ue；The d2d communication frequency of described second community sends timing to described 2nd ue transmission paging request with described Message；The d2d communication frequency of described second community sends timing to described 2nd ue transmission data with described；

Described receiver module is specifically for receiving described in described 2nd ue transmission on the d2d communication frequency of described first community The equipment of the 2nd ue finds signal, finds described 2nd ue；The d2d communication frequency of described first community receives described second The page-response message that ue sends；The data that described 2nd ue sends is received on the d2d communication frequency of described first community.

10. the ue according to any one of claim 6 to 9 is it is characterised in that described determining module is specifically for will be described The descending timing determination of second community is described transmission regularly.

11. ue according to claim 8, it is characterised in that described receiver module is additionally operable to find by equipment, find institute State the 3rd ue；

Described sending module is additionally operable to send the paging request message described second community information of request to described 3rd ue；

Described receiver module is additionally operable to receive the described second community information that described 3rd ue is sent by page-response message.