CN105637958A - Method and apparatus for device-to-device communication - Google Patents
Method and apparatus for device-to-device communication Download PDFInfo
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Abstract
Provided are a method and an apparatus for D2D communication. The method comprises: determining broadcast data channel use information comprised a frame structure of D2D broadcast communication; and selecting, according to the determined use information, an idle broadcast data channel from the frame structure to transmit D2D broadcast data.
Description
For method and apparatus technical field of the equipment to equipment communication
The present invention relates to the communications field, more particularly, to method and apparatus of the equipment in communication system to equipment communication.Background technology
Equipment is to equipment（Device-to-Device, D2D) this communication mechanism is to such as Long Term Evolution（Long Term Evolution) etc. cellular communication system enhancing.In D2D communications, user equipment in close proximity to one another（UE can be with higher data transfer rate direct communication between).D2D communications can realize many benefits, such as mitigate base station（BS live load).At present, third generation partner program（3GPP) communicated on D2D and carried out the standardization effort of correlation.
In D2D communications, the previous study hotspot of mesh is the D2D broadcast communications under outer (out-of-coverage) this scene of coverage.For such D2D broadcast communications, a key issue is how effectively to support VoIP business.However, the respective coverage for the multiple user equipmenies broadcasted is probably overlapping, if multiple user equipmenies carry out D2D broadcast communications simultaneously, probably influence each other.
In existing technology, random schedule scheme is used in D2D broadcast communications.In this random schedule scheme, each user equipment broadcasted randomly chooses time resource and frequency resource to carry out the transmission of D2D broadcast datas.Because time resource and frequency resource are randomly selected, multiple user equipmenies may use identical or neighbouring resource, thus may cause uncontrollable collision and dry 4 outstanding.
Based on discussed above, there is a need in the art for a kind of more efficiently scheme for being used to support the D2D broadcast communications in communication system.The content of the invention
In order to overcome above mentioned problem of the prior art, the present invention proposes a kind of method and apparatus communicated for D2D.
There is provided a kind of method communicated for D2D according to the first aspect of the invention.This method includes：It is determined that the use information for broadcast data channel included in the frame structure of D2D broadcast communications；And according to identified use information, select an idle broadcast data channel to transmit D2D broadcast datas from frame structure.
There is provided a kind of device communicated for D2D according to the second aspect of the invention.The device includes：Determining unit, is configured to determine that the use information of broadcast data channel included in the frame structure for D2D broadcast communications；And selecting unit, it is configured as according to identified use information, selects an idle broadcast data channel to transmit D2D broadcast datas from frame structure.
Embodiments in accordance with the present invention, devise the frame structure for D2D broadcast communications, are realized based on the frame structure and complete synchronous transmission of signal to the scheduling for the user equipment broadcasted, and in D2D broadcast communications.The solution of the present invention can effectively reduce collision probability of happening and interference volume in D2D broadcast communications, and significantly improve D2D broadcast behaviors.
By below to the description for the preferred embodiment for illustrating the principle of the invention, and with reference to accompanying drawing, other features of the invention and advantage would is that obviously.Brief description of the drawings
By the explanation below in conjunction with accompanying drawing, and as the more comprehensively understanding to the present invention, other objects of the present invention and effect will become clearer and it can be readily appreciated that wherein：
Fig. 1 is the flow chart for the method 100 for D2D broadcast communications that # occupies one embodiment of the present of invention；
Fig. 2 is the flow chart for the method 200 for D2D broadcast communications that # occupies one embodiment of the present of invention；
Fig. 3 is the block diagram of the device 300 according to an embodiment of the invention for D2D broadcast communications；
Fig. 4 is the schematic diagram 400 of the frame structure according to an embodiment of the invention for D2D broadcast communications;
Fig. 5 is that the broadcast data channel according to an embodiment of the invention to that will perform re-transmission carries out silent schematic diagram 500;
Fig. 6 is the schematic diagram 600 according to an embodiment of the invention that synchronizing signal is sent in D2D broadcast communications;
Fig. 7 is the schematic diagram 700 according to an embodiment of the invention for sending synchronizing signal in synchronous signaling region in D2D broadcast communications;And
Fig. 8 is the schematic diagram 800 for sending synchronizing signal in synchronous signaling region in D2D broadcast communications according to another embodiment of the invention.
In all above-mentioned accompanying drawings, identical label is represented with identical, similar or corresponding feature or function.Embodiment
Embodiments of the present invention are explained in more detail and illustrated below in conjunction with accompanying drawing.It should be appreciated that being given for example only property of the drawings and Examples effect of the present invention, is not intended to limit protection scope of the present invention.
Flow chart and block diagram in accompanying drawing, it is illustrated that according to the system of various embodiments of the invention, architectural framework in the cards, function and the operation of method and apparatus.At this point, each square frame in flow chart or block diagram can represent a part for a module, program segment or code, and a part for the module, program segment or code includes one or more executable instructions for being used to realize defined logic function.It should also be noted that in some realizations alternately, the function of being marked in square frame can also be with different from the order marked in accompanying drawing generation.For example, two square frames succeedingly represented can essentially be performed substantially in parallel, they can also be performed in the opposite order sometimes, and this is depending on involved function.It will also be noted that, the combination of each square frame in block diagram and/or flow chart and the square frame in block diagram and/or flow chart, it can be realized, or can be realized with the combination of specialized hardware and computer instruction with the special hardware based system of defined function or operation is performed.It should be appreciated that being given for example only property of the drawings and Examples effect of the present invention, is not intended to limit protection scope of the present invention.The present invention is explained in more detail and illustrated below in conjunction with accompanying drawing.
In the present invention, user equipment（UE can be) various types of terminals, such as mobile phone, personal digital assistant（PDA), portable computer or other any appropriate terminals with mobile communication function.Base station for example can be node B, eNodeB (eNB), access
Point（AP), radio access station（RAS), etc..
Although it should be noted that embodiments of the invention have mainly used Long Term Evolution（LTE) system is described as example, but what this was merely exemplary, technical scheme can be completely applied to other suitable systems.
Before describing in detail embodiments that are in accordance with the present invention, embodiments in accordance with the present invention are introduced first is used for the frame structure of D2D broadcast communications.In a physical layer cycle, the frame structure for D2D broadcast communications includes one or more broadcast blocks.Each broadcast blocks correspond to multiple subframes in time domain, and with the multiple resource blocks corresponding with each subframe in the multiple subframe, the number of this multiple resource block can be even number.Each broadcast blocks include one or more broadcast data channels, and each broadcast data channel corresponds to a subframe in time domain, and with the multiple resource blocks corresponding with the subframe, the number of this multiple resource block can be even number.Multiple resource blocks that each broadcast blocks have are the integral multiples for multiple resource blocks that each broadcast data channel has.
It is described below in an embodiment according to the present invention, the illustrative embodiments being designed to the frame structure for D2D broadcast communications.First, frame structure for D2D broadcast communications can contemplate the division of time-frequency resources and the method for salary distribution is designed.For example for LTE systems, when the division and distribution of resource are carried out in T/F plane, resource allocation minimum scheduling unit includes two continuous resource blocks of a sub- frame in（RB), it is referred to as resource block pair, and its size is, for example, 180k Hz x lms.Resource allocation unit for D2D broadcast communications can include multiple resource blocks pair.
Secondly, the frame structure for D2D broadcast communications can contemplate voice-over-net phone（VoIP) service communication requires to design.VoIP business is periodic, and encoder frames length is 20ms (Bos second）, that is to say, that speech coder generates packets of voice per 20ms.Each corresponding speech payload of encoder frames is 328 bits.Therefore, within the physical layer, the resource allocation carried out for the user equipment broadcasted is also periodic, and this cycle is referred to as the physical layer cycle.The physical layer cycle can be pre-set.For example, the physical layer cycle can be configured to the integral multiple of VoIP encoder frames length, such as 20ms, 40ms etc..End-to-end delay limitation for VoIP business is 200ms, and this is the limitation to the maximum cycle of resource allocation in physical layer.
In D2D broadcast communications, in order to provide larger coverage, QPSK can be used（QPSK) technology is used as modulation scheme, and code rate can be less than 1/2.According to the above discussion, the physical layer cycle can be configured to the integral multiple of VoIP encoder frames length, such as 20ms, 40ms etc..Therefore, the minimum physical layer cycle can occupy VoIP encoder frames length with # to set, for example, be set to 20ms.In view of with interior leakage（In-band emission) problem, the physical layer cycle can be set to 40ms.
Fig. 4 is the schematic diagram 400 of the frame structure according to an embodiment of the invention for D2D broadcast communications.Fig. 4 shows the frame structure for D2D broadcast communications on a physical layer cycle, and the physical layer cycle includes 40 subframes, and each subframe is, for example, lms.Frame structure shown in Fig. 4 includes 4 broadcast blocks, and each broadcast blocks are by NFIndividual resource block frequency domain width χ ΝρIndividual subframe time domain length represents, wherein NFRepresent the allocated frequency resource of a broadcast blocks in a physical layer cycle, and NpRepresent the allocated time-domain resource of a broadcast blocks in a physical layer cycle.In an embodiment according to the present invention, ΝτRepresent the time resource for being used to transmit D2D broadcast datas distributed in a physical layer cycle.As shown in figure 4, each broadcast blocks are allocated Ν in time domainρ=4 subframes, so this 4 broadcast blocks are assigned to Ν altogether in time domainτ=16 subframes.In addition, each broadcast blocks are allocated N on frequency domainF=48 resource block frequency domain width.
Embodiments in accordance with the present invention, each broadcast blocks include one or more broadcast data channels, and each broadcast data channel represents basic resources allocation unit, and it is by NbIndividual 1 subframe of resource block frequency domain width X represents, wherein NbThe frequency resource of a broadcast data channel is distributed in expression.As shown in figure 4, each broadcast data channel（As shown in the oblique line frame in Fig. 4）Correspond to a subframe in time domain, and with the multiple resource blocks corresponding with the subframe, such as Nb=6。
Describe to be used for the method for D2D broadcast communications according to an embodiment of the invention below based on the above-mentioned frame structure for D2D broadcast communications.
Fig. 1 is the flow chart for the method 100 for D2D broadcast communications that # occupies one embodiment of the present of invention.Embodiment shown in Fig. 1 can be performed by user equipment or other any suitable equipments.
In step S 101, it is determined that for broadcast included in the frame structure of D2D broadcast communications
The use information of data channel.
It is just blunt according to embodiments of the invention, in step S101, the use information of broadcast data channel included in frame structure can be determined in several ways.In one embodiment, it can first determine whether with the presence or absence of idle subframe in multiple subframes in frame structure, then when idle subframe is not present in the frame structure, obtain the position for using broadcast data channel in each busy subframe.Thus obtained use information can be indicated in frame structure with the presence or absence of idle subframe, it is possible to indicate to use position of broadcast data channel, etc. in each busy subframe.
In step S102, according to identified use information, an idle broadcast data channel is selected to transmit D2D broadcast datas from frame structure.
Embodiments in accordance with the present invention, when identified use information indicates to there is idle subframe in frame structure in step S101, a broadcast data channel in selection free time subframe is used as the idle broadcast data channel.When the use information indicates that idle subframe is not present in frame structure, can be according to the position for using broadcast data channel in busy subframe, to select a unused broadcast data channel in busy subframe as idle broadcast data channel, to transmit D2D broadcast datas.
It can come to select idle broadcast data channel from the unused broadcast data channel in busy subframe in several ways.For example, it can be searched in busy subframe with a busy subframe at least using resource block, wherein signal most weak busy subframe is determined in the busy subframe found, then selects a unused broadcast data channel to be used as the idle broadcast data channel for transmitting D2D broadcast datas in identified busy subframe.
Outside step S101 and S102, as optional step, the method 100 for D2D broadcast communications shown in Fig. 1 can also include data retransmission processes.For example, the re-transmission to D2D broadcast datas can performed with idle broadcast data channel identical broadcast data channel for each broadcast blocks in the physical layer cycle.The step S205 for combining Fig. 2 is described in further detail for description as described in re-transmission.
In addition, outside step S101 and S102, as another optional step, the method 100 for D2D broadcast communications shown in Fig. 1 can also include synchronizing signal transmission process.Above-mentioned synchronizing signal can be sent using a variety of implementations.Transmission on synchronizing signal is retouched
State and the step S206 for combining Fig. 2 is described in further detail.
Fig. 2 is the flow chart for the method 200 for D2D broadcast communications that # occupies one embodiment of the present of invention.Method 200 is considered a kind of embodiment of the method 100 shown in Fig. 1.In the description below in relation to method 200, describe how # occupies the frame structure for D2D broadcast communications to obtain the use information of broadcast data channel in detail, and how to be selected idle broadcast data channel to transmit D2D broadcast datas according to the use information.In addition, also describing D2D broadcast datas retransmission processes and synchronizing signal transmission process.It should be appreciated that these descriptions and introduction are provided to more clearly express the principle of the present invention, they are all exemplary rather than restricted.
In step S201, judge in multiple subframes in frame structure with the presence or absence of idle subframe.When there is idle subframe in frame structure, the broadcast data channel that method 200 is entered in step S202, the idle subframe of selection transmits D2D broadcast datas as idle broadcast data channel.When idle subframe is not present in frame structure, method 200 enters step S203, for each busy subframe, obtains the position for using broadcast data channel in busy subframe.Then, in step S204, the position for using broadcast data channel in the busy subframe obtained according to step S203 selects a unused broadcast data channel in busy subframe to transmit D2D broadcast datas as idle broadcast data channel.
In step S205, for each broadcast blocks in the physical layer cycle, the re-transmission to D2D broadcast datas is being performed with idle broadcast data channel identical broadcast data channel.
As shown in figure 4, distributing to the Ν of D2D broadcast datasτIn broadcast blocks corresponding to the 1-4 subframe of=16 subframes, UE1 carries out D2D broadcast data transmissions in a broadcast data channel in the 1st subframe, UE2 and UE5 carries out D2D broadcast data transmissions in different two broadcast data channel in the 2nd subframe, UE3 carries out D2D broadcast data transmissions in a broadcast data channel in the 3rd subframe, UE4 carries out D2D broadcast data transmissions in a broadcast data channel in the 4th subframe.When retransmitting, in the broadcast blocks corresponding to the 5-8 subframe, the broadcast blocks corresponding to the 9-12 subframe and the broadcast blocks corresponding to the 13-16 subframe, 1st subframes of the UE1 still in each broadcast blocks（Namely whole ΝτThe 5th subframe in individual subframe）In identical broadcasts data channel on carry out D2D broadcast data re-transmissions, similarly, the identical broadcasts data of UE2-UE5 also in each broadcast blocks
D2D broadcast data re-transmissions are carried out on channel.In this manner it is achieved that time diversity.For receiving user equipment, additional merging can be used（Chase combining) mode receives come the D2D broadcast datas to re-transmission.
Embodiments in accordance with the present invention, the number of times of re-transmission can be configured based on the traffic loads in communication system, wherein setting high number of retransmissions when traffic loads are big, low number of retransmissions is set when traffic loads are small.Specifically, can be by more interference at the user equipment for receiving D2D broadcast datas when traffic loads are larger（Such as collision, with interior interference）, therefore number of retransmissions could be arranged to higher number of times, so as to improve the reliability and robustness of D2D broadcast communications.On the other hand, if traffic loads are smaller, the receiving power for the user equipment that can then set less number of retransmissions to save the transimission power for the user equipment broadcasted and received, while also more available resources can be reserved for the same physical layer cycle.
According to one embodiment of present invention, the user equipment broadcasted may determine whether to carry out silence to the broadcast data channel that being used in each broadcast blocks retransmits.In other words, it can not be retransmitted in each broadcast blocks, it is possible thereby to mitigate the influence of the interior leakage of band caused by the parallel transmission in same subframe.
Fig. 5 shows the schematic diagram 500 according to an embodiment of the invention for carrying out silence to the broadcast data channel that will perform re-transmission in specific broadcast blocks.In Figure 5, UE5 is in first broadcast blocks（1st to 4 subframe）In transmit D2D broadcast datas in a broadcast data channel in the 2nd subframe after, in second broadcast blocks（5th to 8 subframe）In identical broadcasts data channel（The broadcast data channel in same position in i.e. the 6th subframe, is represented by latticed square frame）Silence can be carried out.Similarly, UE2 is in first broadcast blocks（1st to 4 subframe）In transmit D2D broadcast datas in a broadcast data channel in the 2nd subframe after, in the 4th broadcast blocks（13rd to 16 subframe）In identical broadcasts data channel（The broadcast data channel in same position in i.e. the 14th subframe, is represented by latticed square frame）Silence can be carried out.
According to one embodiment of present invention, it can decide whether to carry out silence to broadcast data channel in the following manner：Based on the traffic loads in communication system and the number of retransmissions set, estimate to carry out the general of silence to the broadcast data channel that will perform re-transmission in broadcast blocks
Rate；And according to the probability estimated, decide whether to carry out silence in the broadcast data channel that will perform re-transmission in the broadcast blocks.
In step S206, each broadcast blocks in the physical layer cycle, synchronizing signal is sent in the symbol of the subframe corresponding with idle broadcast data channel.
For purposes such as timing and Frequency Synchronizations, synchronizing signal can be transmitted together with broadcast data channel.It is transmitted in any OFDM symbol that synchronizing signal can be in the subframe corresponding to broadcast data channel.Synchronizing signal for example can be the specific master sync signal of user equipment（PSS)/auxiliary synchronous signals（SSS), PSS/SSS signals can be placed in two continuous OFDM symbols.Fig. 6 shows the schematic diagram 600 that synchronizing signal is sent in D2D broadcast communications just according to one embodiment of the present of invention.As shown in fig. 6, synchronizing signal is placed on the beginning of subframe.Embodiments in accordance with the present invention, synchronizing signal can include the information for being used to transmit the symbol of the synchronizing signal in instruction subframe.For example, when the synchronous signal transmission in the 1st of subframe and the 2nd OFDM symbol, the synchronizing signal can include the information for indicating the 1st and the 2nd OFDM symbol.
According to one embodiment of present invention, when in D2D broadcast communications when starting to need protective time slot, the synchronizing signal can be sent in the symbol after the symbol of the subframe shared by protective time slot.For example, when the 1st OFDM symbol of subframe corresponds to protective time slot, PSS/SSS signals can be transmitted in the 2nd of subframe and the 3rd OFDM symbol.
As step S206 alternate embodiment, in addition to sending synchronizing signal in existing each broadcast blocks in the physical layer cycle, dedicated broadcast block can also be added in the physical layer cycle to utilize the dedicated broadcast block to send synchronizing signal.Specifically, dedicated broadcast block can be added in the physical layer cycle and is used as synchronous signaling region；In the synchronous signaling region, synchronizing signal is sent using same position corresponding with idle broadcast data channel；And happened suddenly when occurring call（Talk spurt) when, synchronizing channel is set up with transmission of synchronization messages in same position.Synchronization message can include much information, for example, can include D2D broadcast and initiate party identifier, D2D broadcast initiators type, modulation and encoding scheme（At least one of MCS) and/or in other relevant informations.
Fig. 7 is the schematic diagram 700 according to an embodiment of the invention for sending synchronizing signal in synchronous signaling region in D2D broadcast communications.As shown in fig. 7, with ΝτIndividual subframe pair
A dedicated broadcast block, which is with the addition of, before four broadcast blocks answered is used as synchronous signaling region.In the synchronous signaling region, user equipment can utilize same position corresponding with idle broadcast data channel to send synchronizing signal, and D2D broadcast datas are not sent now.Sent in broadcast data channel of the D2D broadcast datas still in four broadcast blocks corresponding with N τ subframes.For user equipment, when occurring call burst, can in synchronous signaling region with method 100 determined by the same position of free time broadcast data channel set up synchronizing channel, with transmission of synchronization messages.As shown in fig. 7, UE3 establishes synchronizing channel in synchronous signaling region（As shown in the square frame with vertical line）.
By this embodiment, the synchronous signaling region in each physical layer cycle can only be monitored to obtain synchronizing signal and/or synchronization message by receiving the user equipment of D2D broadcast datas, so as to effectively reduce reception power consumption.Meanwhile, send the user equipment of D2D broadcast datas only can also send synchronizing signal and/or synchronization message in synchronous signaling region, equally reduce sending power consumption.
As step S206 another alternate embodiment, the synchronizing signal can also can be sent in the symbol after the symbol of the subframe shared by protective time slot in D2D broadcast communications when starting to need protective time slot.In addition, synchronizing signal can be in synchronous signaling region with method 100 determined by free time broadcast data channel same position corresponding to subframe in any OFDM symbol in be transmitted.Synchronizing signal can include the information for being used to transmit the symbol of the synchronizing signal in instruction subframe.
Fig. 8 is the schematic diagram 800 for sending synchronizing signal in synchronous signaling region in D2D broadcast communications according to another embodiment of the invention.As shown in Figure 8, in synchronous signaling region, UE1 synchronizing signal is sent in subframe in the OFDM symbol of position more rearward, sent in the OFDM symbol placed in the middle of UE2 synchronizing signal position in subframe, UE3 and UE5 synchronizing signal is sent in subframe in the OFDM symbol of foremost, and is sent in the more forward OFDM symbol in UE4 synchronizing signal position in subframe.
Fig. 3 is the block diagram of the device 300 according to an embodiment of the invention for D2D broadcast communications.Device shown in Fig. 3 can be included in user equipment and directly or indirectly be coupled either in other any suitable equipments or with user equipment or other any suitable equipments.
As shown in figure 3, being used for the device of D2D broadcast communications according to an embodiment of the invention
300 include：Determining unit 310, is configured to determine that the use information of broadcast data channel included in the frame structure for D2D broadcast communications；And selecting unit 320, it is configured as according to identified use information, selects an idle broadcast data channel to transmit D2D broadcast datas from frame structure.
Embodiments in accordance with the present invention, in a physical layer cycle, frame structure can include one or more broadcast blocks.Each broadcast blocks can correspond to multiple subframes in time domain, and with the multiple resource blocks corresponding with each subframe in multiple subframes.Each broadcast blocks can include one or more broadcast data channels, and each broadcast data channel corresponds to a subframe in time domain, and with the multiple resource blocks corresponding with subframe.Multiple resource blocks that each broadcast blocks have can be the integral multiple for multiple resource blocks that each broadcast data channel has.
Just blunt according to embodiments of the invention, determining unit 310 can include：Judging unit, is configured as judging in multiple subframes in frame structure with the presence or absence of idle subframe；And acquiring unit, when being configured as that idle subframe is not present in frame structure, for each busy subframe, obtain the position for using broadcast data channel in busy subframe.
# occupies embodiments of the invention, and selecting unit 320 can include：First Channel assignment unit, when being configured as there is idle subframe in use information instruction frame structure, a broadcast data channel in the idle subframe of selection is used as idle broadcast data channel；And second channel selecting unit, when being configured as that idle subframe is not present in use information instruction frame structure, according to the position for using broadcast data channel in busy subframe, a unused broadcast data channel in busy subframe is selected to be used as idle broadcast data channel.
Just blunt according to embodiments of the invention, the second channel selecting unit of selecting unit 320 can include：Searching unit, is configured as searching a busy subframe with resource block is at least used in busy subframe；Signal intensity determining unit, is configured to determine that the most weak busy subframe of signal in the busy subframe found；And idle broadcast data channel selecting unit, it is configured as selecting a unused broadcast data channel in identified busy subframe as idle broadcast data channel.
Embodiments in accordance with the present invention, according to an embodiment of the invention the device 300 for D2D broadcast communications can also include：Retransmission unit, is configured as each broadcast blocks in the physical layer cycle, is performed with idle broadcast data channel identical broadcast data channel to D2D
The re-transmission of broadcast data.
Embodiments in accordance with the present invention, wherein the number of times retransmitted is set based on the traffic loads in communication system, and sets high number of retransmissions when traffic loads are big, low number of retransmissions is set when traffic loads are small.
Just blunt according to embodiments of the invention, retransmission unit can include：Estimation unit, is configured as based on the traffic loads in communication system and the number of retransmissions set, estimates to carry out silent probability to the broadcast data channel that will perform re-transmission in broadcast blocks；And retransmission controlling unit, it is configured as according to the probability estimated, decides whether to carry out silence in the broadcast data channel that will perform re-transmission in broadcast blocks.
Embodiments in accordance with the present invention, according to an embodiment of the invention the device 300 for D2D broadcast communications can also include：First synchronizing signal transmitting element, is configured as in each broadcast blocks in the physical layer cycle, synchronizing signal is sent in the symbol of the subframe corresponding with idle broadcast data channel.
Embodiments in accordance with the present invention, according to an embodiment of the invention the device 300 for D2D broadcast communications can also include：Dedicated broadcast block adding device, is configured as adding dedicated broadcast block in the physical layer cycle as synchronous signaling region；Second synchronizing signal transmitting element, be configured as in synchronous signaling region, and synchronizing signal is sent using with the same position corresponding to idle broadcast data channel；And synchronizing channel sets up unit, when being configured as occurring call burst, synchronizing channel is set up with transmission of synchronization messages using same position.
Just blunt according to embodiments of the invention, synchronization message can include at least one in the following：Party identifier, D2D broadcast initiators type, modulation and encoding scheme are initiated in D2D broadcast.
Embodiments in accordance with the present invention, when when starting to need protective time slot, synchronizing signal is sent in the symbol after the symbol of the subframe shared by protective time slot in D2D broadcast communications.
Embodiments in accordance with the present invention, synchronizing signal can include the information for the symbol for indicating to be used in subframe synchronous signal transmission.
It should be appreciated that the structured flowchart described in Fig. 3 and Fig. 4 is shown just to the purpose of example, it is not limitation of the present invention.For clarity, some selectable units and subelement of device 300 are not shown in figure 3.In some cases, it can be added as needed on or reduce some of which unit/subelement.It will be appreciated, however, that above with reference to Fig. 1-
Each feature described by Fig. 2 is equally applicable to device 300.Moreover, terminology used here " unit " both can be hardware module or software unit module.Correspondingly, device 300 can be by being embodied in various ways.For example, in certain embodiments, device can be realized with some or all of using software and/or firmware, for example, it is implemented as comprising computer program product on a computer-readable medium.Alternatively or additionally, device can be realized with some or all of based on hardware, for example, be implemented as integrated circuit（IC), application specific integrated circuit（ASIC), on-chip system（SOC), field programmable gate array（FPGA) etc..The scope of the present invention is not limited in this respect.
In addition, embodiments of the invention can include the entity device comprising said apparatus.For example, the present invention can be implemented as including the user equipment of device described above 300, including but not limited to cell phone, mobile phone, personal digital assistant（PDA tablet PC or any appropriate fixation and/or mobile device), with communication capacity.
For illustration purposes only, some exemplary embodiments of the present invention are hereinbefore described.Embodiments of the invention can be realized by the combination of hardware, software or software and hardware.Hardware components can be realized using special logic；Software section can be stored in memory, by appropriate instruction execution system, and such as microprocessor or special designs hardware are performed.It will be understood by those skilled in the art that above-mentioned system and method can use computer executable instructions and/or be realized included in processor control routine, such as in such as disk, CD or DVD-ROM mounting medium, such as read-only storage（Firmware）Programmable memory or such as optics or electrical signal carrier data medium on provide such code.Present system can be realized by the hardware circuit of the programmable hardware device of the semiconductor or field programmable gate array, programmable logic device of super large-scale integration OR gate array, logic chip, transistor etc. etc., it can also be realized, can also be realized by the combination such as firmware of above-mentioned hardware circuit and software with by the software of various types of computing devices.
If although it should be noted that being referred to the equipment for drying or sub-device of system in above-detailed, this division is only not enforceable.In fact, embodiments in accordance with the present invention, the feature and function of two or more above-described devices can embody in one apparatus.Conversely, the feature and function of an above-described device can be further divided into by multiple dresses
Put to embody.Similarly, although describing the operation of the inventive method with particular order in the accompanying drawings, this does not require that or implied must perform these operations according to the particular order, or the operation having to carry out shown in whole could realize desired result.On the contrary, the step of describing in flow chart can change execution sequence.Additionally or alternatively, it is convenient to omit some steps, multiple steps are merged into a step execution, and/or a step is decomposed into execution of multiple steps.
Although describing the present invention by reference to some specific embodiments, it should be appreciated that, the present invention is not limited to disclosed specific embodiment.It is contemplated that various modifications and equivalent arrangements included by covering in spirit and scope of the appended claims.Scope of the following claims meets broadest explanation, so as to include all such modifications and equivalent structure and function.
Claims (1)
- Claims1. a kind of method communicated for equipment to equipment D2D, including：It is determined that the use information for broadcast data channel included in the frame structure of D2D broadcast communications；AndAccording to identified use information, an idle broadcast data channel is selected to transmit D2D broadcast datas from the frame structure.2. according to the method described in claim 1, wherein in a physical layer cycle, the frame structure includes one or more broadcast blocks,Wherein each broadcast blocks correspond to multiple subframes in time domain, and with the multiple resource blocks corresponding with each subframe in the multiple subframe,Wherein each broadcast blocks include one or more broadcast data channels, and each broadcast data channel corresponds to a subframe in time domain, and with the multiple resource blocks corresponding with the subframe, andMultiple resource blocks that wherein each broadcast blocks have are the integral multiples for multiple resource blocks that each broadcast data channel has.3. according to the method described in claim 1, wherein determining the use information of broadcast data channel included in the frame structure for D2D broadcast communications includes：Judge in multiple subframes in the frame structure with the presence or absence of idle subframe；And when idle subframe is not present in the frame structure, for each busy subframe, obtain the position for using broadcast data channel in the busy subframe.4. according to the method described in claim 1, wherein according to identified use information, selecting an idle broadcast data channel to include to transmit D2D broadcast datas from the frame structure：When the use information indicates to there is idle subframe in the frame structure, a broadcast data channel in the idle subframe is selected to be used as the idle broadcast data channel；AndWhen the use information indicates that idle subframe is not present in the frame structure, according to the position for using broadcast data channel in busy subframe, a unused broadcast data channel in the busy subframe is selected to be used as the idle broadcast data channel.5. method according to claim 4, wherein selecting a unused broadcast data channel in the busy subframe to include as the idle broadcast data channel：Searched in the busy subframe with a busy subframe at least using resource block；It is determined that signal most weak busy subframe in the busy subframe found；And select a unused broadcast data channel to be used as the idle broadcast data channel in identified busy subframe.6. according to the method described in claim 1, in addition to：For each broadcast blocks in the physical layer cycle, the re-transmission to the D2D broadcast datas is being performed with the idle broadcast data channel identical broadcast data channel.7. method according to claim 6, wherein the number of times of the re-transmission is set based on the traffic loads in communication system, andHigh number of retransmissions is wherein set when the traffic loads are big, low number of retransmissions is set when the traffic loads are small.8. method according to claim 6, wherein for each broadcast blocks in the physical layer cycle, including in the re-transmission performed with the idle broadcast data channel identical broadcast data channel to the D2D broadcast datas：Based on the traffic loads in communication system and the number of retransmissions set, estimate to carry out silent probability to the broadcast data channel that will perform re-transmission in broadcast blocks；AndAccording to the probability estimated, decide whether to carry out silence in the broadcast data channel that will perform re-transmission in the broadcast blocks.9. according to the method described in claim 1, in addition to：In each broadcast blocks in the physical layer cycle, synchronizing signal is sent in the symbol of the subframe corresponding with the idle broadcast data channel.10. # occupies the method described in claim 1, in addition to：Dedicated broadcast block is added in the physical layer cycle and is used as synchronous signaling region；In the synchronous signaling region, synchronizing signal is sent using same position corresponding with the idle broadcast data channel；AndWhen occurring call burst, set up synchronizing channel to transmit synchronization using the same position Message.11. method according to claim 10, wherein the synchronization message includes at least one in the following：Party identifier, D2D broadcast initiator's types, and modulation and encoding scheme are initiated in D2D broadcast.12. the method according to any one of claim 9-11, wherein when when starting to need protective time slot, the synchronizing signal is sent in the symbol after the symbol of the subframe shared by the protective time slot in the D2D broadcast communications.13. method according to claim 11, wherein the synchronizing signal includes the information for being used to transmit the symbol of the synchronizing signal in instruction subframe.14. a kind of device communicated for equipment to equipment D2D, including：Determining unit, is configured to determine that the use information of broadcast data channel included in the frame structure for D2D broadcast communications；AndSelecting unit, is configured as according to identified use information, selects an idle broadcast data channel to transmit D2D broadcast datas from the frame structure.15. device according to claim 14, wherein in a physical layer cycle, the frame structure includes one or more broadcast blocks,Wherein each broadcast blocks correspond to multiple subframes in time domain, and with the multiple resource blocks corresponding with each subframe in the multiple subframe,Wherein each broadcast blocks include one or more broadcast data channels, and each broadcast data channel corresponds to a subframe in time domain, and with the multiple resource blocks corresponding with the subframe, andMultiple resource blocks that wherein each broadcast blocks have are the integral multiples for multiple resource blocks that each broadcast data channel has.16. device according to claim 14, wherein the determining unit includes：Judging unit, is configured as judging in multiple subframes in the frame structure with the presence or absence of idle subframe；AndAcquiring unit, when being configured as that idle subframe is not present in the frame structure, for each busy subframe, obtains the position for using broadcast data channel in the busy subframe.17. device according to claim 14, wherein the selecting unit includes：First Channel assignment unit, when being configured as there is idle subframe in the use information instruction frame structure, selects a broadcast data channel in the idle subframe to be used as the idle broadcast data channel；AndSecond channel selecting unit, when being configured as that idle subframe is not present in the use information instruction frame structure, according to the position for using broadcast data channel in busy subframe, a unused broadcast data channel in the busy subframe is selected to be used as the idle broadcast data channel.18. device according to claim 17, wherein the second channel selecting unit includes：Searching unit, is configured as searching a busy subframe with resource block is at least used in the busy subframe；Signal intensity determining unit, is configured to determine that the most weak busy subframe of signal in the busy subframe found；AndIdle broadcast data channel selecting unit, is configured as selecting a unused broadcast data channel in identified busy subframe as the idle broadcast data channel.19. device according to claim 14, in addition to：Retransmission unit, is configured as each broadcast blocks in the physical layer cycle, and the re-transmission to the D2D broadcast datas is being performed with the idle broadcast data channel identical broadcast data channel.20. device according to claim 19, wherein the number of times of the re-transmission is set based on the traffic loads in communication system, andHigh number of retransmissions is wherein set when the traffic loads are big, low number of retransmissions is set when the traffic loads are small.21. device according to claim 19, wherein the retransmission unit includes：Estimation unit, is configured as based on the traffic loads in communication system and the number of retransmissions set, estimates to carry out silent probability to the broadcast data channel that will perform re-transmission in broadcast blocks；AndRetransmission controlling unit, is configured as according to the probability estimated, decides whether described wide Broadcast and silence is carried out in the broadcast data channel that will perform re-transmission in block.22. device according to claim 14, in addition to：First synchronizing signal transmitting element, is configured as in each broadcast blocks in the physical layer cycle, and synchronous letter is sent in the symbol of the subframe corresponding with the idle broadcast data channel23. device according to claim 14, in addition to：Dedicated broadcast block adding device, is configured as adding dedicated broadcast block in the physical layer cycle as synchronous signaling region；Second synchronizing signal transmitting element, is configured as in the synchronous signaling region, and synchronizing signal is sent using same position corresponding with the idle broadcast data channel；AndSynchronizing channel sets up unit, and when being configured as occurring call burst, synchronizing channel is set up with transmission of synchronization messages using the same position.24. device according to claim 23, wherein the synchronization message includes at least one in the following：Party identifier, D2D broadcast initiator's types, and modulation and encoding scheme are initiated in D2D broadcast.25. the device according to any one of claim 22-24, wherein when when starting to need protective time slot, the synchronizing signal is sent in the symbol after the symbol of the subframe shared by the protective time slot in the D2D broadcast communications.26. device according to claim 24, wherein the synchronizing signal includes the information for being used to transmit the symbol of the synchronizing signal in instruction subframe.27. a kind of user equipment, including the device according to any one of claim 14 to 26.
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| PCT/CN2013/086422 WO2015062073A1 (en) | 2013-11-01 | 2013-11-01 | Method and apparatus for device-to-device communication |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109792627A (en) * | 2016-10-07 | 2019-05-21 | 瑞典爱立信有限公司 | Monitor the network node and method of the system covering in cordless communication network |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106303899B (en) * | 2015-05-14 | 2021-04-16 | 上海诺基亚贝尔股份有限公司 | Method and apparatus for device-to-device communication |
| CN106304257A (en) * | 2015-05-15 | 2017-01-04 | 上海贝尔股份有限公司 | Select UE to the method for the relaying of network with for relaying the synchronous method of discovery |
| WO2017063147A1 (en) * | 2015-10-13 | 2017-04-20 | 海能达通信股份有限公司 | Method, apparatus, and system for uploading data in private network communication, and communication device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1392023A2 (en) * | 2002-08-20 | 2004-02-25 | Nokia Corporation | Short range wireless communication |
| CN101102239A (en) * | 2006-07-04 | 2008-01-09 | 华为技术有限公司 | Establishment method and device for channel allocation connection of Mesh network |
| WO2012091420A2 (en) * | 2010-12-27 | 2012-07-05 | 한국전자통신연구원 | Method for establishing a device-to-device link connection and scheduling for device-to-device communication and terminal relaying |
| CN103024911A (en) * | 2012-11-30 | 2013-04-03 | 北京邮电大学 | Data transmission method of terminal direct communication in cellular and D2D hybrid network |
| CN103260244A (en) * | 2013-04-15 | 2013-08-21 | 西安交通大学 | D2D uplink resource reuse mode switch method in cellular system |
-
2013
- 2013-11-01 WO PCT/CN2013/086422 patent/WO2015062073A1/en active Application Filing
- 2013-11-01 CN CN201380080215.2A patent/CN105637958B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1392023A2 (en) * | 2002-08-20 | 2004-02-25 | Nokia Corporation | Short range wireless communication |
| CN101102239A (en) * | 2006-07-04 | 2008-01-09 | 华为技术有限公司 | Establishment method and device for channel allocation connection of Mesh network |
| WO2012091420A2 (en) * | 2010-12-27 | 2012-07-05 | 한국전자통신연구원 | Method for establishing a device-to-device link connection and scheduling for device-to-device communication and terminal relaying |
| CN103024911A (en) * | 2012-11-30 | 2013-04-03 | 北京邮电大学 | Data transmission method of terminal direct communication in cellular and D2D hybrid network |
| CN103260244A (en) * | 2013-04-15 | 2013-08-21 | 西安交通大学 | D2D uplink resource reuse mode switch method in cellular system |
Non-Patent Citations (1)
| Title |
|---|
| NOKIA等: "D2D Communication without network coverage", 《3GPP TSG-RAN WG1 MEETING #74BIS R1-134535》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109792627A (en) * | 2016-10-07 | 2019-05-21 | 瑞典爱立信有限公司 | Monitor the network node and method of the system covering in cordless communication network |
| CN109792627B (en) * | 2016-10-07 | 2022-04-19 | 瑞典爱立信有限公司 | Network node and method for monitoring system coverage in a wireless communication network |
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| CN105637958B (en) | 2020-05-12 |
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