CN104812053B - The transmission method and system, transmitting terminal and receiving end of D2D communication synchronization channel - Google Patents
The transmission method and system, transmitting terminal and receiving end of D2D communication synchronization channel Download PDFInfo
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- CN104812053B CN104812053B CN201410036816.XA CN201410036816A CN104812053B CN 104812053 B CN104812053 B CN 104812053B CN 201410036816 A CN201410036816 A CN 201410036816A CN 104812053 B CN104812053 B CN 104812053B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/001—Synchronization between nodes
- H04W56/002—Mutual synchronization
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/001—Synchronization between nodes
Abstract
The invention discloses a kind of transmission method of D2D communication synchronization channel and system, transmitting terminal and receiving end, which includes: transmitting terminal and receiving end, and transmitting terminal includes generation module and sending module, for sending D2DSS and PD2DSCH；Receiving end includes receiving module and processing module, for receiving D2DSS and PD2DSCH；Wherein, when sending PD2DSCH, frequency domain position and D2DSS frequency domain position in subframe of the PD2DSCH in subframe is consistent；Alternatively, frequency domain position of the PD2DSCH in subframe is determined by D2DSS；When receiving PD2DSCH, PD2DSCH is received on frequency domain position identical with the frequency domain position where D2DSS；Alternatively, receiving PD2DSCH on the frequency domain position determined by the D2DSS.The present invention solve the outer scene of various coverings divide into it is standby to the stationary problem between equipment.
Description
Technical field
The present invention relates to wireless communication field more particularly to a kind of device-to-device (Device-to-Device, abbreviations
D2D) transmission method and system, the transmitting terminal and receiving end of communication synchronization channel.
Background technique
Cellular communication system is due to realizing the multiplexing to limited spectrum resources, so that wireless communication technique obtains
It flourishes.In the cellular system, when thering is business to need to pass between two user equipmenies (User Equipment, referred to as UE)
When defeated, user equipment 1(UE1) to the business datum of user equipment 2(UE2), it can be first by air interface transmission to base station 1, base station 1
By core net by the user data transmission to base station 2, above-mentioned business datum is passed through air interface transmission to UE2 again by base station 2.UE2
Business data transmission to UE1 uses similar process flow.As shown in Figure 1, when UE1 and UE2 is located at the same cellular cell,
Then while base station 1 and base station 2 are the same websites, however a data transmission still can consume two parts of radio spectrum resources.
It can be seen that if user equipment 1 and user equipment 2 are located at same cell and at a distance of relatively close, it is above-mentioned
Cellular communication method is apparently not optimal communication mode.And in fact, with mobile communication business diversification, for example, society
Hand over network, e-payment etc. in a wireless communication system using more and more extensive so that the business between short distance user passes
Defeated demand is growing.Therefore, the communication pattern of device-to-device (Device-to-Device, referred to as D2D) is increasingly subject to
Extensive concern.So-called D2D as shown in Fig. 2, referring to that business datum is forwarded without base station, but is directly set by source user
The standby air interface transmission that passes through is to target UE.This communication pattern is different from the communication pattern of conventional cellular systems.For close
For the user of distance communication, D2D not only saves radio spectrum resources, and reduces the data transmission pressure of core net.
Based on Cellular Networks D2D communication be a kind of under the control of system, it is multiple support D2D functions terminal devices between directly into
The new technique of row communication, it can reduce system resource occupancy, increase frequency spectrum efficiency of cellular communication system, reduce terminal transmission
Power consumption, and largely save network operation cost.
In D2D communication, the receiving end of D2D business datum may be single UE, it is also possible to which multiple UE namely D2D are logical
Letter may be unicast (Unicast) communication, it is also possible to broadcast communication (Broadcast) or multicast (Groupcast or
Group Communication) or multicast (Multicast) communication.In the D2D communication plan the considerations of, for above-mentioned logical
The support of letter mode requires to consider.
Long term evolution (Long Term Evolution, referred to as LTE) system, senior long term evolution (LTE-
Advanced, referred to as LTE-A) system and Advanced International Mobile Communications (International Mobile
Telecommunication Advanced, referred to as IMT-Advanced) system is all with orthogonal frequency division multiplexing
Based on (Orthogonal Frequency Division Multiplexing, referred to as OFDM) technology, ofdm system is
The data mode of time-frequency bidimensional.The radio frames (frame) of one 10ms are made of 10 subframes, and 1 subframe (subframe) is by 2
A continuous slot (slot) composition, i.e. subframe i includes time slot 2i and 2i+1.Normal cyclic prefix (Normal Cyclic
Prefix, referred to as Normal CP) when, 1 downlink subframe is made of 14 OFDM symbols, and 1 sub-frame of uplink is by 14 SC-
FDMA(single carrier-Frequency Division Multiple Access, he Single Carrier-Frequency Division multiple access) set of symbols
At；Extend CP(Extended CP) when, 1 downlink subframe is made of 12 OFDM symbols, and 1 sub-frame of uplink is by 12 SC-
FDMA symbol.
Wherein, a resource block (Resource Block, referred to as RB) is by 12 subcarriers continuous on frequency domain, and
All OFDM/SC-FDMA symbols composition in time domain in continuous 1 time slot；One resource block is to (Resource Block
Pair, referred to as RB pair) by all in continuous 1 subframe in 12 subcarriers continuous on frequency domain and time domain
OFDM/SC-FDMA symbol composition.The resource of a corresponding subcarrier is known as resource unit on each OFDM/SC-FDMA symbol
(Resource Element, referred to as RE).
In LTE/LTE-A cellular communication, it is terminal and base station that cell searching, which is step very crucial in mobile communication,
Establish the premise of communication link.Either terminal initial power-on in the serving cells, or carry out cell in communication process and cut
It changes, requires to establish connection by cell search process and base station.Cell search process is primarily to keep terminal and place small
Area obtains time synchronization and Frequency Synchronization and obtains physical district ID, system bandwidth and other cell broadcast informations.Usual terminal
By synchronization signal, acquisition time synchronization, Frequency Synchronization first then obtains the relevant information for being presently in cell, as bandwidth,
Cell ID, frame clock information, antenna in cell configuration, CP length etc..
In D2D communication, source user equipment and target UE carry out data transmission primary on condition that realizing transmitting-receiving
The Time and Frequency Synchronization at both ends, at present about only one rough synchronizing process of the relevant design of D2D synchronization, the i.e. receiving end D2D root
It is obtained according to the device-to-device synchronization signal (D2DSynchronization Signal, abbreviation D2DSS) that D2D transmitting terminal is sent
After the Time and Frequency Synchronization of transmitting terminal, the physical equipment from the transmission of D2D transmitting terminal is further received to equipment synchronizing channel
(Physical D2D Synchronization Channel, abbreviation PD2DSCH), to obtain D2D transmitting terminal specifically
System message and control information relevant with subsequent data reception.However, there are no any concrete implementation details, wherein
How to be transmitted including D2DSS and PD2DSCH, the association etc. between D2DSS and PD2DSCH.Since D2D communication uses ascending resource
(i.e. the sub-frame of uplink of the upstream band of FDD or TDD) is transmitted, therefore synchronizing process and synchronous signaling between D2D UE
Design all in LTE/LTE-A system synchronize have very big difference.
Summary of the invention
The technical problem to be solved by the invention is to provide a kind of transmission method of D2D communication synchronization channel and systems, hair
Sending end and receiving end, solve under the outer scene of various coverings (covering is outer and covering in/half mulching scene under) device-to-device it
Between stationary problem.
In order to solve the above-mentioned technical problems, the present invention provides a kind of transmission sides of device-to-device communication synchronization channel
Method, comprising:
Device-to-device D2D transmitting terminal sending device is believed with physical equipment to equipment is synchronous to equipment synchronization signal D2DSS
Road PD2DSCH, wherein when sending the PD2DSCH, frequency domain position and the D2DSS of the PD2DSCH in subframe exist
Frequency domain position in subframe is consistent or frequency domain position of the PD2DSCH in subframe is determined by the D2DSS.
Further, the D2DSS includes: D2D primary synchronization signal PD2DSS and/or D2D secondary synchronization signal SD2DSS；Its
In, the PD2DSS and the SD2DSS are sent in the form of sequence, and the sequence type of the PD2DSS is M, M be less than etc.
In 3 positive integer；The sequence type of the SD2DSS is N, and N is more than or equal to the sum of RB corresponding to D2D transmission bandwidth
Positive integer.
Further, frequency domain position of frequency domain position and the D2DSS of the PD2DSCH in subframe in subframe is protected
It holds consistent, comprising:
PD2DSCH described in subframe occupied initial data block RB index and RB number and the D2DSS on frequency domain
Occupied starting RB index and RB number are all the same on frequency domain.
Further, frequency domain position of the PD2DSCH in subframe is determined by the D2DSS, comprising:
The corresponding one or more PD2DSCH of a D2DSS in subframe；The D2DSS indicates respectively each PD2DSCH in son
Occupied starting RB index and occupied RB number in frame frequency domain.
Further, the D2DSS indicates respectively each PD2DSCH occupied starting RB index in subframe frequency domain
And occupied RB number, comprising:
The a corresponding PD2DSCH occupied RB number in subframe frequency domain of every kind of sequence of the PD2DSS；
The a corresponding PD2DSCH occupied starting RB index in subframe frequency domain of every kind of sequence of the SD2DSS.
Further, every kind of sequence of the SD2DSS corresponds to each PD2DSCH occupied in subframe frequency domain
Beginning RB index, comprising:
If N is equal to the sum of RB corresponding to D2DSS transmission bandwidth, the N kind sequence of the SD2DSS is corresponding each
PD2DSCH occupied starting RB index in subframe frequency domain；
If N is greater than the sum of RB corresponding to D2DSS transmission bandwidth, film is taken to obtain value L the RB sum using N,
The L kind sequence of the SD2DSS corresponds to PD2DSCH occupied starting RB index in subframe frequency domain, wherein the L is
Less than or equal to the positive integer of the sum of RB corresponding to D2DSS transmission bandwidth.
Further, the method also includes:
When sending the PD2DSCH, the PD2DSCH in the time domain shared by the PD2DSS or the SD2DSS when
First available the one or more consecutive of he Single Carrier-Frequency Division multiple access SC-FDMA sign-on after or before the symbol of domain can
It is sent on SC-FDMA symbol, wherein the number of one or more consecutive available SC-FDMA symbol shared by the PD2DSCH
By the preparatory fixed configurations of network side.
Further, the number of one or more consecutive available SC-FDMA symbol shared by the D2DSCH be 4 or 5 or
6。
Further, the method also includes:
Without under covering scene, D2D transmitting terminal monitors the available resources of D2DSS, if listening to idling-resource,
The idle resource of selection one sends the D2DSS and PD2DSCH；If not listening to available resources, under waiting
One moment monitored again；Or have under covering/part covering scene, D2D transmitting terminal is sent out in the available resources that network side is dispatched
Send D2DSS.
In order to solve the above-mentioned technical problem, the present invention also provides a kind of transmission sides of device-to-device communication synchronization channel
Method, comprising:
The receiving end device-to-device D2D receives the device-to-device synchronization signal D2DSS and object sent from D2D transmitting terminal
Manage device-to-device synchronizing channel PD2DSCH, wherein the frequency domain when receiving the PD2DSCH, where with the D2DSS
PD2DSCH is received on the identical frequency domain position in position；Or PD2DSCH is received on the frequency domain position determined by the D2DSS.
Further, the D2DSS includes: D2D primary synchronization signal PD2DSS and/or D2D secondary synchronization signal SD2DSS；Its
In, PD2DSS and SD2DSS are received in the form of sequence, and the sequence type of PD2DSS is M, and M is the positive integer less than or equal to 3；
The sequence type of SD2DSS is N, and N is the positive integer more than or equal to the sum of RB corresponding to D2D transmission bandwidth.
It is further, described to receive PD2DSCH on frequency domain position identical with the frequency domain position where the D2DSS,
Include:
With receive PD2DSCH on the occupied initial data block RB index of the D2DSS, and the PD2DSCH is in frequency
The occupied RB number in domain is identical as the occupied RB number of the D2DSS.
It is further, described to receive PD2DSCH on the frequency domain position determined by the D2DSS, comprising:
The corresponding PD2DSCH of sequence of acquisition SD2DSS occupied starting RB index and PD2DSS in subframe frequency domain
The corresponding PD2DSCH of sequence in subframe frequency domain occupied RB number；
The PD2DSCH is received on the starting RB index and the corresponding frequency domain position of the RB number.
Further, the method also includes:
First available SC- shared by the PD2DSS or the SD2DSS after or before time-domain symbol in the time domain
It is received on continuous 4 or 5 or 6 available SC-FDMA symbols of FDMA sign-on and demodulates the PD2DSCH.
Further, the method also includes:
The receiving end D2D monitors and receives D2DSS in all D2DSS available resources, completes preliminary between transmitting terminal
When Frequency Synchronization；
After receiving and demodulating the PD2DSCH, Traffic Channel is connect according to the information completion in the PD2DSCH
It receives.
In order to solve the above-mentioned technical problem, the present invention also provides a kind of transmitting terminals of device-to-device communication, comprising:
Generation module, for generating device to equipment synchronization signal D2DSS and physical equipment to equipment synchronizing channel
PD2DSCH；
Sending module, for sending device to equipment synchronization signal D2DSS and physical equipment to equipment synchronizing channel
PD2DSCH；Wherein, when sending the PD2DSCH, frequency domain position and the D2DSS of the PD2DSCH in subframe are in son
Frequency domain position in frame is consistent；Alternatively, frequency domain position of the PD2DSCH in subframe is determined by the D2DSS.
Further, the D2DSS includes: D2D primary synchronization signal PD2DSS and/or D2D secondary synchronization signal SD2DSS；Its
In, the PD2DSS and the SD2DSS are sent in the form of sequence, and the sequence type of the PD2DSS is M, M be less than etc.
In 3 positive integer；The sequence type of the SD2DSS is N, and N is more than or equal to the sum of RB corresponding to D2D transmission bandwidth
Positive integer.
Further, the sending module is used for frequency domain position of the PD2DSCH in subframe when sending the PD2DSCH
It sets and is consistent with frequency domain position of the D2DSS in subframe, comprising:
PD2DSCH described in subframe occupied initial data block RB index and RB number and the D2DSS on frequency domain
Occupied starting RB index and RB number are all the same on frequency domain.
Further, the sending module is used for frequency domain position of the PD2DSCH in subframe when sending the PD2DSCH
It sets and is determined by the D2DSS, comprising:
When sending the PD2DSCH, the corresponding one or more PD2DSCH of a D2DSS in subframe；The D2DSS points
Each PD2DSCH occupied starting RB index and occupied RB number in subframe frequency domain are not indicated.
Further, the sending module, for when sending the PD2DSCH, the D2DSS to indicate respectively each
PD2DSCH occupied starting RB index and occupied RB number in subframe frequency domain, comprising:
The a corresponding PD2DSCH occupied RB number in subframe frequency domain of every kind of sequence of the PD2DSS；
The a corresponding PD2DSCH occupied starting RB index in subframe frequency domain of every kind of sequence of the SD2DSS.
Further, every kind of sequence of the SD2DSS corresponds to each PD2DSCH occupied in subframe frequency domain
Beginning RB index, comprising:
If N is less than or equal to the sum of RB corresponding to D2DSS transmission bandwidth, the N kind sequence of the SD2DSS is corresponding
Each PD2DSCH occupied starting RB index in subframe frequency domain；
If it is total that N is greater than RB corresponding to D2DSS transmission bandwidth, the L for taking film to obtain the RB sum using N,
The L kind sequence of the SD2DSS corresponds to PD2DSCH occupied starting RB index in subframe frequency domain, the L be less than
Equal to the positive integer of the sum of RB corresponding to D2DSS transmission bandwidth.
Further, the sending module is also used to when sending the PD2DSCH, the PD2DSCH in the time domain from
First available he Single Carrier-Frequency Division multiple access SC- after or before time-domain symbol shared by the PD2DSS or SD2DSS
It is sent on the one or more consecutive available SC-FDMA symbol of FDMA sign-on, wherein continuous 4 shared by the PD2DSCH
Or the number of 5 or 6 available SC-FDMA symbols is by the preparatory fixed configurations of network side.
Further, the transmitting terminal further include:
Resource selection module, for monitoring the available resources of D2DSS, if listened under no covering scene
Idling-resource then selects an idle resource notification sending module to send the D2DSS and PD2DSCH；If no
Available resources are listened to, then wait subsequent time to monitor again；Or under covering/part covering scene, using network side tune
The available resources notice sending module of degree sends D2DSS in the available resources that network side is dispatched.
In order to solve the above-mentioned technical problem, the present invention also provides a kind of receiving ends of device-to-device communication, comprising:
Receiving module, for receiving device-to-device synchronization signal D2DSS from D2D transmitting terminal and physical equipment to setting
Standby synchronizing channel PD2DSCH, wherein when receiving the PD2DSCH, identical with the frequency domain position where the D2DSS
PD2DSCH is received on frequency domain position；Alternatively, receiving PD2DSCH on the frequency domain position determined by the D2DSS；
Processing module for demodulating to the PD2DSCH received, and is completed according to the information in the PD2DSCH
Reception to Traffic Channel.
Further, the D2DSS includes: D2D primary synchronization signal PD2DSS and/or D2D secondary synchronization signal SD2DSS；Its
In, PD2DSS and SD2DSS are received in the form of sequence, and the sequence type of PD2DSS is M, and M is the positive integer less than or equal to 3；
The sequence type of SD2DSS is N, and N is the positive integer more than or equal to the sum of RB corresponding to D2D transmission bandwidth.
Further, the receiving module, for the frequency domain when receiving the PD2DSCH, where with the D2DSS
PD2DSCH is received on the identical frequency domain position in position, comprising:
With receive PD2DSCH on the occupied initial data block RB index of the D2DSS, and the PD2DSCH is in frequency
The occupied RB number in domain is identical as the occupied RB number of the D2DSS.
Further, the receiving module is used for when receiving the PD2DSCH, in the frequency domain determined by the D2DSS
PD2DSCH is received on position, comprising:
The corresponding PD2DSCH of sequence of acquisition SD2DSS occupied starting RB index and PD2DSS in subframe frequency domain
The corresponding PD2DSCH of sequence in subframe frequency domain occupied RB number；
Above-mentioned PD2DSCH is received on the starting RB index and the corresponding frequency domain position of the RB number.
Further, the receiving module is also used to when receiving the PD2DSCH, in the time domain from the PD2DSS
Or continuous 4 or 5 or 6 of first available SC-FDMA sign-on after or before time-domain symbol shared by the SD2DSS
It can be with being received on SC-FDMA symbol and demodulate the PD2DSCH.
Further, the receiving module includes:
First module is completed between transmitting terminal for monitoring and receiving D2DSS in all D2DSS available resources
Frequency Synchronization when preliminary；
Second module, for receiving PD2DSCH on frequency domain position identical with the frequency domain position where the D2DSS；
Or PD2DSCH is received on the frequency domain position determined by the D2DSS.
In order to solve the above-mentioned technical problem, the present invention also provides a kind of transmission systems of device-to-device communication synchronization channel
System, comprising: transmitting terminal as described above and receiving end as described above.
Compared with prior art, it the transmission method of D2D communication synchronization channel provided by the invention and system, transmitting terminal and connects
Receiving end mainly solves outside covering and covers the stationary problem under interior/half mulching scene between device-to-device.
Detailed description of the invention
Fig. 1 is cellular communication schematic diagram when UE is located at same base station cell in the prior art；
Fig. 2 is a kind of preferred D2D communication system schematic diagram in the prior art；
Fig. 3 is the detailed process flow chart that D2D transmitting terminal sends PD2DSCH in embodiment；
Fig. 4 is the detailed process flow chart that the receiving end D2D receives PD2DSCH in embodiment；
Fig. 5 is the Transmission system structure chart of device-to-device communication synchronization channel in embodiment；
Fig. 6 is the frequency domain position of frequency domain position and D2DSS in subframe using PD2DSCH a kind of in example 1 in subframe
Set the time-frequency location schematic diagram being consistent;
Fig. 7 is using frequency domain position and D2DSS frequency domain in subframe of the another kind PD2DSCH in subframe in example 1
The time-frequency location schematic diagram that position is consistent;
Fig. 8 is the time-frequency location schematic diagram determined using frequency domain position where PD2DSCH a kind of in example 2 by D2DSS；
Fig. 9 is the time-frequency location schematic diagram determined using frequency domain position where another kind PD2DSCH in example 2 by D2DSS；
Figure 10 is multiple PD2DSCH to be corresponded to using 3 D2DSS in example 3, and frequency domain position where PD2DSCH is by D2DSS
Determining time-frequency location schematic diagram.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention
Embodiment be described in detail.It should be noted that in the absence of conflict, in the embodiment and embodiment in the application
Feature can mutual any combination.
Embodiment:
A kind of transmission method of device-to-device communication synchronization channel is present embodiments provided, D2D transmitting terminal, packet are applied to
It includes:
D2D transmitting terminal sends D2DSS and PD2DSCH, wherein when sending the PD2DSCH, the PD2DSCH is in son
The frequency domain position of frequency domain position and the D2DSS in subframe in frame is consistent or the PD2DSCH is in subframe
Frequency domain position is determined by the D2DSS.
Wherein, the D2DSS include: D2D primary synchronization signal (Primary D2D Synchronization Signal,
Abbreviation PD2DSS) and/or D2D secondary synchronization signal (Secondary D2D Synchronization Signal, referred to as
SD2DSS)；Wherein, PD2DSS and SD2DSS is sent in the form of sequence, and the sequence type of PD2DSS is M, M be less than or equal to
3 positive integer；The sequence type of SD2DSS is N, and N is the positive integer more than or equal to the sum of RB corresponding to D2D transmission bandwidth.
The PD2DSCH is sent in the form of data packet, wherein the information carried includes: D2D synchronization signal transmitting terminal
The system bandwidth of the type and/or D2D of id information and/or D2D synchronization signal transmitting terminal communication and/or the sub-frame configuration of D2D
When information and/or D2D transmitting terminal are subsequently used for sending the transmission of running time-frequency resource and/or business datum used in business datum
The contents such as long and/or the relevant control information of business, power control.
As a preferred mode, frequency domain position and the D2DSS of the PD2DSCH in subframe are in subframe
Frequency domain position is consistent, comprising:
PD2DSCH described in subframe on frequency domain occupied initial data block RB index and RB number with it is described
D2DSS occupied starting RB index index and RB number on frequency domain is all the same.Namely institute includes in subframe
The number of PD2DSCH and D2DSS be it is stringent one-to-one, i.e. a D2DSS uniquely corresponds to a PD2DSCH.
As a preferred mode, frequency domain position of the PD2DSCH in subframe is determined by the D2DSS, comprising:
The corresponding one or more PD2DSCH of a D2DSS in subframe；The D2DSS indicates respectively each PD2DSCH in son
Occupied starting RB index and occupied RB number in frame frequency domain.
Here, different from such a way that signaling etc. directly indicates, determine refer to not be D2DSS directly to include instruction
Content, i.e. starting RB index and occupied RB number, but will act as the synchronous sequence (sequence of PD2DSS in receiving end
With the sequence of SD2DSS) new meaning is increased, it is used to refer to each PD2DSCH occupied starting RB in subframe frequency domain
Index and occupied RB number.
Wherein, the D2DSS indicate respectively each PD2DSCH in subframe frequency domain occupied starting RB index with
And occupied RB number, comprising:
The a corresponding PD2DSCH occupied RB number in subframe frequency domain of every kind of sequence of the PD2DSS；
The a corresponding PD2DSCH occupied starting RB in subframe frequency domain of every kind of sequence of the SD2DSS
index。
For example, 3 kinds of different sequences in M=3, PD2DSS respectively correspond a numerical value in 0~2, the numerical value and
The occupied RB number of PD2DSCH is bound.Sequence 1 corresponds to numerical value 0, indicates that PD2DSCH occupies X RB；Sequence 2 corresponds to number
Value 1 indicates that PD2DSCH occupies Y RB；The corresponding numerical value 2 of sequence 3 indicates that PD2DSCH occupies Z RB, and wherein X, Y, Z value are each
Different positive integer, preferred value are X=2, Y=4, Z=6, specifically by the preparatory fixed configurations of network side.
Specifically, the different sequence of N kind in SD2DSS respectively corresponds a numerical value in 0~N-1, the numerical value
The occupied starting RB index of PD2DSCH, wherein if N is less than or equal to the sum of RB corresponding to D2DSS transmission bandwidth,
The N kind sequence of the SD2DSS corresponds to each PD2DSCH occupied starting RB index in subframe frequency domain；
If N is greater than the sum of RB corresponding to D2DSS transmission bandwidth, film is taken to obtain value L the RB sum using N,
The L kind sequence of the SD2DSS corresponds to PD2DSCH occupied starting RB index in subframe frequency domain, wherein the L
For the positive integer less than or equal to the sum of RB corresponding to D2DSS transmission bandwidth.
In addition, the PD2DSCH is in the time domain from the PD2DSS or SD2DSS when sending the PD2DSCH
The one or more consecutive available SC-FDMA of first available SC-FDMA sign-on after or before shared time-domain symbol
It is sent on symbol, wherein the number of one or more consecutive available SC-FDMA symbol is by network side shared by the PD2DSCH
Preparatory fixed configurations, it is preferable that be 4 or 5 or 6；After the time-domain symbol shared by the PD2DSS or the SD2DSS or it
Preceding is by the preparatory fixed configurations of network side.
As a preferred mode, as shown in figure 3, without under covering scene, the D2D transmitting terminal sends PD2DSCH's
Detailed process includes:
S101:D2D transmitting terminal first monitors the available resources of D2DSS；
S102: judging whether to listen to idling-resource, if so, S103 is thened follow the steps, it is no to then follow the steps S104；
S103: if listening to idling-resource, an idle resource is selected to send D2DSS and PD2DSCH；
S104: if D2D transmitting terminal does not listen to available resources, subsequent time is waited to monitor again, and according to prison
Result is listened to choose whether to send D2DSS and PD2DSCH.
In addition, as a preferred mode, the D2D transmitting terminal refers to according to base station in the case where covering interior/half mulching scene
The available resources shown send D2DSS in the dispatching down distributing of network side.
Wherein, when sending PD2DSCH, using frequency domain position of the PD2DSCH in subframe and the D2DSS in subframe
The mode that is consistent of frequency domain position send,
Alternatively, being sent in such a way that frequency domain position of the PD2DSCH in subframe is determined by the D2DSS.
The present embodiment additionally provides a kind of transmission method of device-to-device communication synchronization channel, is applied to the receiving end D2D,
Include:
D2D transmitting terminal receives the D2DSS and PD2DSCH sent from D2D transmitting terminal, wherein the receiving end D2D receives first
D2DSS, then when receiving the PD2DSCH, the PD2DSCH is in frequency identical with the frequency domain position where the D2DSS
Domain receives PD2DSCH on position；Or PD2DSCH is received on the frequency domain position determined by the D2DSS.
It is wherein, described to receive PD2DSCH on frequency domain position identical with the frequency domain position where the D2DSS, comprising:
With receive PD2DSCH on the occupied initial data block RB index of the D2DSS, and the PD2DSCH exists
The occupied RB number of frequency domain is identical as the occupied RB number of the D2DSS.That is, each D2DSS uniquely corresponds to one
PD2DSCH。
It is wherein, described to receive PD2DSCH on the frequency domain position determined by the D2DSS, comprising:
Obtain SD2DSS the corresponding PD2DSCH of sequence in subframe frequency domain occupied starting RB index with
The corresponding PD2DSCH of the sequence of PD2DSS occupied RB number in subframe frequency domain；
Wherein, the sequence of SD2DSS is one of N kind sequence, a numerical value in corresponding 0~N-1, the numerical value
PD2DSCH occupied starting RB index in subframe frequency domain；The sequence of PD2DSS is one of M kind sequence, right
Answer a numerical value in 0~M-1, the RB number that numerical value PD2DSCH is occupied.
PD2DSCH is received on the starting RB index and the corresponding frequency domain position of the RB number.
In addition, this method further include:
First available SC- shared by the PD2DSS or the SD2DSS after or before time-domain symbol in the time domain
It is received on continuous 4 or 5 or 6 available SC-FDMA symbols of FDMA sign-on and demodulates the PD2DSCH.
As a preferred mode, as shown in figure 4, the detailed process that the receiving end D2D receives PD2DSCH includes:
The receiving end S201:D2D monitors and receives D2DSS in all D2DSS available resources, completes between transmitting terminal
Frequency Synchronization when preliminary；
The receiving end S202:D2D is in RB index identical with the occupied RB index of D2DSS, alternatively, D2DSS is determined
Starting RB index and the corresponding frequency domain position of the RB number on receive PD2DSCH, and from PD2DSS or SD2DSS it
On continuous 4 or 5 or 6 available SC-FDMA symbols of the available SC-FDMA sign-on of first afterwards or before, receives and solve
Adjust PD2DSCH；
S203: it after receiving and demodulating the PD2DSCH, is completed according to the information in the PD2DSCH to Traffic Channel
Reception.
As shown in figure 5, the present embodiment additionally provides a kind of Transmission system of device-to-device communication synchronization channel, comprising:
The transmitting terminal of D2D communication and the receiving end of D2D communication, in which:
Transmitting terminal, comprising:
Generation module, for generating device to equipment synchronization signal D2DSS and physical equipment to equipment synchronizing channel
PD2DSCH；
Sending module, for sending device to equipment synchronization signal D2DSS and physical equipment to equipment synchronizing channel
PD2DSCH；Wherein, when sending the PD2DSCH, frequency domain position and the D2DSS of the PD2DSCH in subframe are in son
Frequency domain position in frame is consistent；Alternatively, frequency domain position of the PD2DSCH in subframe is determined by the D2DSS.
Wherein, the D2DSS includes: D2D primary synchronization signal PD2DSS and/or D2D secondary synchronization signal SD2DSS；Wherein,
The PD2DSS and SD2DSS is sent in the form of sequence, and the sequence type of the PD2DSS is M, and M is less than or equal to 3
Positive integer；The sequence type of the SD2DSS is N, and N is just whole more than or equal to the sum of RB corresponding to D2D transmission bandwidth
Number.
Wherein, the sending module, for when sending the PD2DSCH, frequency domain position of the PD2DSCH in subframe with
Frequency domain position of the D2DSS in subframe is consistent, comprising:
PD2DSCH described in subframe occupied initial data block RB index and RB number and the D2DSS on frequency domain
Occupied starting RB index and RB number are all the same on frequency domain.
As a preferred mode, the sending module, for when sending the PD2DSCH, PD2DSCH to be in subframe
In frequency domain position determined by the D2DSS, comprising:
When sending the PD2DSCH, the corresponding one or more PD2DSCH of a D2DSS in subframe；The D2DSS points
Each PD2DSCH occupied starting RB index and occupied RB number in subframe frequency domain are not indicated.
As another preferred mode, the sending module, for when sending the PD2DSCH, the D2DSS to divide
Each PD2DSCH occupied starting RB index and occupied RB number in subframe frequency domain are not indicated, comprising:
The a corresponding PD2DSCH occupied RB number in subframe frequency domain of every kind of sequence of the PD2DSS；
The a corresponding PD2DSCH occupied starting RB index in subframe frequency domain of every kind of sequence of the SD2DSS.
Wherein, every kind of sequence of the SD2DSS corresponds to each PD2DSCH occupied starting RB in subframe frequency domain
Index, comprising:
If N is less than or equal to the sum of RB corresponding to D2DSS transmission bandwidth, the N kind sequence of the SD2DSS is corresponding
Each PD2DSCH occupied starting RB index in subframe frequency domain；
If it is total that N is greater than RB corresponding to D2DSS transmission bandwidth, the L for taking film to obtain the RB sum using N,
The L kind sequence of the SD2DSS corresponds to PD2DSCH occupied starting RB index in subframe frequency domain, the L be less than
Equal to the positive integer of the sum of RB corresponding to D2DSS transmission bandwidth.
In addition, the sending module, is also used to when sending the PD2DSCH, the PD2DSCH is in the time domain from described
First available he Single Carrier-Frequency Division multiple access SC-FDMA symbol after or before time-domain symbol shared by the PD2DSS or SD2DSS
Number start one or more consecutive available SC-FDMA symbol on send, wherein continuous 4 or 5 or 6 shared by the PD2DSCH
The number of a available SC-FDMA symbol is by the preparatory fixed configurations of network side.
In addition, the transmitting terminal further include:
Resource selection module, for monitoring the available resources of D2DSS, if listened under no covering scene
Idling-resource then selects an idle resource notification sending module to send the D2DSS and PD2DSCH；If no
Available resources are listened to, then wait subsequent time to monitor again；Or under covering/part covering scene, using network side tune
The available resources notice sending module of degree sends D2DSS in the available resources that network side is dispatched.
Receiving end, comprising:
Receiving module, for receiving device-to-device synchronization signal D2DSS from D2D transmitting terminal and physical equipment to setting
Standby synchronizing channel PD2DSCH, wherein when receiving the PD2DSCH, identical with the frequency domain position where the D2DSS
PD2DSCH is received on frequency domain position；Alternatively, receiving PD2DSCH on the frequency domain position determined by the D2DSS；
Processing module for demodulating to the PD2DSCH received, and is completed according to the information in the PD2DSCH
Reception to Traffic Channel.
Wherein, the D2DSS includes: D2D primary synchronization signal PD2DSS and/or D2D secondary synchronization signal SD2DSS；Wherein,
PD2DSS and SD2DSS is received in the form of sequence, and the sequence type of PD2DSS is M, and M is the positive integer less than or equal to 3；
The sequence type of SD2DSS is N, and N is the positive integer more than or equal to the sum of RB corresponding to D2D transmission bandwidth.
As a preferred mode, the receiving module, for when receiving the PD2DSCH, with the D2DSS
PD2DSCH is received on the identical frequency domain position of the frequency domain position at place, comprising:
With receive PD2DSCH on the occupied initial data block RB index of the D2DSS, and the PD2DSCH is in frequency
The occupied RB number in domain is identical as the occupied RB number of the D2DSS.
As another preferred mode, the receiving module is used for when receiving the PD2DSCH, by described
PD2DSCH is received on the frequency domain position that D2DSS is determined, comprising:
The corresponding PD2DSCH of sequence of acquisition SD2DSS occupied starting RB index and PD2DSS in subframe frequency domain
The corresponding PD2DSCH of sequence in subframe frequency domain occupied RB number；
Above-mentioned PD2DSCH is received on the starting RB index and the corresponding frequency domain position of the RB number.
In addition, the receiving module, is also used to when receiving the PD2DSCH, in the time domain from the PD2DSS or institute
Continuous 4 or 5 or 6 of first available SC-FDMA sign-on after or before stating time-domain symbol shared by SD2DSS are available
It is received on SC-FDMA symbol and demodulates the PD2DSCH.
Wherein, the receiving module includes:
First module is completed between transmitting terminal for monitoring and receiving D2DSS in all D2DSS available resources
Frequency Synchronization when preliminary；
Second module, for receiving PD2DSCH on frequency domain position identical with the frequency domain position where the D2DSS；
Or PD2DSCH is received on the frequency domain position determined by the D2DSS.
It is kept using frequency domain position of frequency domain position and the D2DSS of the example 1(PD2DSCH in subframe in subframe
Unanimously)
In the program, the number of the PD2DSCH and D2DSS that include in every subframe be it is stringent one-to-one, i.e., each
D2DSS uniquely corresponds to a PD2DSCH.As shown in fig. 6, sharing the available money of 3 groups of synchronization signals in entire D2D transmission bandwidth
Source, in which:
Time needed for transmitting-receiving conversion of the protection interval for D2D UE.
The RB index where RB index and the 1st group of D2DSS where PD2DSCH in 1st group is completely the same, and RB
Number is also identical；First available SC-FDMA symbol after time-domain symbol where the PD2DSCH time-domain symbol shared by the SD2DSS
On the continuous 4 available SC-FDMA symbols started.
The RB index where RB index and the 2nd group of D2DSS where PD2DSCH in 2nd group is completely the same, and RB
Number is also identical；First available SC-FDMA symbol after time-domain symbol where the PD2DSCH time-domain symbol shared by the PD2DSS
On the continuous 6 available SC-FDMA symbols started.
The RB index where RB index and the 3rd group of D2DSS where 3rd group of PD2DSCH is completely the same, RB number
Also identical；First available SC-FDMA symbol after time-domain symbol where the PD2DSCH time-domain symbol shared by the PD2DSS is opened
On the continuous 5 available SC-FDMA symbols to begin.
Wherein, the detailed process of D2D transmitting terminal transmission PD2DSCH includes:
D2D transmitting terminal first monitors the available resources of above-mentioned 3 groups of D2DSS；
Then, an idle resource is selected to send D2DSS and PD2DSCH, the specific rule that sends is:
If the 1st group idle, D2D transmitting terminal is in the RB index where the 1st group of D2DSS, and shared by the SD2DSS
PD2DSCH is sent on continuous 4 available SC-FDMA symbols of first available SC-FDMA sign-on after time-domain symbol.
If the 2nd group idle, D2D transmitting terminal is in the RB index where the 2nd group of D2DSS, and shared by the PD2DSS
PD2DSCH is sent on continuous 6 available SC-FDMA symbols of first available SC-FDMA sign-on after time-domain symbol.
If the 3rd group idle, D2D transmitting terminal is in the RB index where the 3rd group of D2DSS, and shared by the PD2DSS
PD2DSCH is sent on continuous 5 available SC-FDMA symbols of first available SC-FDMA sign-on after time-domain symbol.
If waiting subsequent time to monitor again without idling-resource, and choose whether to send according to snoop results
D2DSS and PD2DSCH.
Wherein, the detailed process of the receiving end D2D reception demodulation PD2DSCH includes:
Firstly, D2DSS is monitored and received in the receiving end D2D in above-mentioned 3 groups of D2DSS available resources, according to PD2DSS and
The relative positional relationship of SD2DSS in the time domain can know RB index where D2DSS, and first between completion and transmitting terminal
Frequency Synchronization when step；
Then, if the receiving end D2D has received D2DSS signal on the 1st group of isochronous resources, the receiving end D2D with
First after the identical RB index of the occupied RB index of D2DSS, and the time-domain symbol shared by the SD2DSS is available
It is received on continuous 4 available SC-FDMA symbols of SC-FDMA sign-on and demodulates PD2DSCH.If the receiving end D2D is the 2nd
D2DSS signal is had received on group isochronous resources, then the receiving end D2D is in RB identical with the occupied RB index of D2DSS
Continuous 6 available SC- of first available SC-FDMA sign-on after index, and the time-domain symbol shared by the PD2DSS
It is received on FDMA symbol and demodulates PD2DSCH.If the receiving end D2D has received D2DSS signal on the 3rd group of isochronous resources,
Then the receiving end D2D is in RB index identical with the occupied RB index of D2DSS, and the time-domain symbol shared by the PD2DSS it
It is received on continuous 5 available SC-FDMA symbols of the available SC-FDMA sign-on of first afterwards and demodulates PD2DSCH.
Finally, the receiving end D2D completes the reception to Traffic Channel according to the information in PD2DSCH.
In addition, as shown in fig. 7, the frequency domain position and time-domain position of the D2DSS in every group are identical as in Fig. 6.Every group
Frequency domain position where PD2DSCH is constant, identical as Fig. 6, RB index and every group of D2DSS where the PD2DSCH in every group
The RB index at place is completely the same, and RB number is also identical；But the time-domain symbol in the 1st group where PD2DSCH is from PD2DSS
On continuous 5 available SC-FDMA symbols of first available SC-FDMA sign-on before shared time-domain symbol；In 2nd group
The company of first available SC-FDMA sign-on before time-domain symbol where the PD2DSCH time-domain symbol shared by the SD2DSS
On continuous 4 available SC-FDMA symbols；Before time-domain symbol in 3rd group where the PD2DSCH time-domain symbol shared by the PD2DSS
On continuous 5 available SC-FDMA symbols of first available SC-FDMA sign-on.
When transmitting terminal selects an idle resource to send PD2DSCH, as shown in fig. 7, from PD2DSS or SD2DSS institute
It is sent on continuous 4 or 5 or 6 available SC-FDMA symbols of first available SC-FDMA sign-on before accounting for time-domain symbol
PD2DSCH。
In receiving end when monitoring in above-mentioned 3 groups of D2DSS available resources and receiving D2DSS, as shown in fig. 7, from PD2DSS
Or continuous 4 or 5 or 6 available SC-FDMA of first available SC-FDMA sign-on before time-domain symbol shared by SD2DSS
It is received on symbol and demodulates PD2DSCH.
It is determined using frequency domain position where example 2(PD2DSCH by D2DSS)
In the program, the number of the PD2DSCH and D2DSS that include in every subframe be can not be correspondingly, i.e., and one
D2DSS can be associated with multiple PD2DSCH.As shown in figure 8, sharing the available of 1 group of synchronization signal in entire D2D transmission bandwidth
Resource, the synchronization signal have corresponded to 4 PD2DSCH.Wherein, the method for determination of PD2DSS frequency domain position is: in PD2DSS
3 kinds of different sequences are carried, this 3 kinds of sequences specifically correspond to a numerical value in 0,1,2, occupied by the numerical value and PD2DSCH
RB number bound.For example, 0 indicates that PD2DSCH occupies 2 RB；1 indicates that PD2DSCH occupies 4 RB；2 indicate
PD2DSCH occupies 6 RB.168 kinds of different sequences are carried in SD2DSS, this 168 kinds of sequences specifically correspond in 0~167
The starting RB index of RB shared by one numerical value, the numerical value and PD2DSCH is bound one by one.
The method of determination of PD2DSS time domain position is: PD2DSCH in the time domain shared by the PD2DSS or SD2DSS when
On continuous 4 or 5 or 6 available SC-FDMA symbols of first available SC-FDMA sign-on after the symbol of domain, wherein
Time-domain symbol number shared by PD2DSCH is fixed, can be and preparatory by network side with 4 or 5 or 6 available SC-FDMA symbols
Fixed configurations, in Fig. 8 by taking 6 available SC-FDMA symbols as an example.
In addition, the method for determination of PD2DSS time domain position is also possible to: PD2DSCH in the time domain from PD2DSS or
The available SC-FDMA symbol of continuous 4 or 5 or 6 of first available SC-FDMA sign-on before time-domain symbol shared by SD2DSS
On number, as shown in figure 9, by taking 4 available SC-FDMA symbols as an example.
Wherein, the detailed process of D2D transmitting terminal transmission PD2DSCH includes:
D2D transmitting terminal first monitors above-mentioned unique D2DSS available resources；
Resource space idle sends D2DSS, wherein the RB of PD2DSCH occupancy is used to refer to using the sequence that PD2DSS is carried
Number, is used to refer to the starting RB index of RB shared by PD2DSCH using the sequence carried in SD2DSS, and from PD2DSS or
Continuous 6 or 4 available SC- of first available SC-FDMA sign-on after or before time-domain symbol shared by SD2DSS
PD2DSCH is sent on FDMA symbol.As shown in Figure 8 and Figure 9,
Corresponding to PD2DSCH1, the sequence that PD2DSS is carried correspond to numerical value 1, i.e., using the transmission of sequence corresponding to 1
PD2DSS, 1 indicates that PD2DSCH occupies 4 RB；The sequence that SD2DSS is carried correspond to numerical value 0, i.e., is sent out using sequence corresponding to 0
SD2DSS is sent, 1 indicates that the starting RB index of RB shared by PD2DSCH is 0, so, when sending PD2DSCH1, initial position is
RB0 occupies 4 RB；
Corresponding to PD2DSCH2, the sequence that PD2DSS is carried correspond to numerical value 2, i.e., using the transmission of sequence corresponding to 2
PD2DSS, 2 indicate that PD2DSCH occupies 6 RB；The sequence that SD2DSS is carried corresponds to numerical value M, and M is a value in 0~167, i.e.,
SD2DSS is sent using sequence corresponding to M, M indicates that the starting RB index of RB shared by PD2DSCH is M, so, it sends
When PD2DSCH2, initial position is RB M, occupies 6 RB.
Corresponding to PD2DSCH3 and PD2DSCH4, PD2DSS carry sequence correspond to numerical value 0, that is, use 0 corresponding to sequence
Column send D2DSS, and 0 indicates that PD2DSCH occupies 2 RB；The sequence that SD2DSS is carried respectively corresponds numerical value of N and O, and N and O are corresponding
For a value in 0~167, that is, be respectively adopted sequence corresponding to N and O send SD2DSS, N and O indicate PD2DSCH3 and
The starting RB index of RB shared by PD2DSCH4 is N and O.So when sending PD2DSCH3 and PD2DSCH4, initial position difference
For RB N and RB O, 2 RB are occupied.
Wherein, the detailed process of the receiving end D2D reception demodulation PD2DSCH includes:
Firstly, D2DSS is monitored and received in the receiving end D2D in above-mentioned unique D2DSS available resources, according to PD2DSS institute
The sequence of carrying can know RB number shared by PD2DSCH；The sequence according to entrained by SD2DSS can know PD2DSCH institute
The initial position of the RB accounted for, Frequency Synchronization when being completed at the same time preliminary between transmitting terminal；
Then, the receiving end D2D is according to the instruction of D2DSS, to corresponding running time-frequency resource on receive and demodulate PD2DSCH.
That is, being used to refer to RB number of PD2DSCH occupancy using the sequence that PD2DSS is carried, utilize what is carried in SD2DSS
Sequence is used to refer to the starting RB index of RB shared by PD2DSCH, and after the time-domain symbol shared by the PD2DSS or SD2DSS
Or it receives and demodulates on continuous 6 or 4 available SC-FDMA symbols of first available SC-FDMA sign-on before
PD2DSCH。
Finally, the receiving end D2D completes the reception to Traffic Channel according to the information in PD2DSCH.
It is determined using frequency domain position where example 3(PD2DSCH by D2DSS)
As shown in Figure 10, there are the available resources of 3 groups of D2DSS, and the available resources of every group of D2DSS have all corresponded to 1 or multiple
PD2DSCH, specific indicating mode is same to be applied described in example 2.
From above-described embodiment as can be seen that compared with the existing technology, the D2D communication synchronization channel provided in above-described embodiment
Transmission method and system, transmitting terminal and receiving end, mainly solve the outer scene of various coverings divide into it is standby to same between equipment
Step problem.
Those of ordinary skill in the art will appreciate that all or part of the steps in the above method can be instructed by program
Related hardware is completed, and described program can store in computer readable storage medium, such as read-only memory, disk or CD
Deng.Optionally, one or more integrated circuits can be used also to realize in all or part of the steps of above-described embodiment.Accordingly
Ground, each module/unit in above-described embodiment can take the form of hardware realization, can also use the shape of software function module
Formula is realized.The present invention is not limited to the combinations of the hardware and software of any particular form.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.According to
Summary of the invention of the invention can also have other various embodiments, without deviating from the spirit and substance of the present invention, be familiar with
Those skilled in the art makes various corresponding changes and modifications in accordance with the present invention, all in the spirit and principles in the present invention
Within, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (16)
1. a kind of transmission method of device-to-device communication synchronization channel, comprising:
Device-to-device D2D transmitting terminal sending device is to equipment synchronization signal D2DSS and physical equipment to equipment synchronizing channel
PD2DSCH, wherein when sending the PD2DSCH, frequency domain position of the PD2DSCH in subframe is true by the D2DSS
It is fixed；
The D2DSS includes: D2D primary synchronization signal PD2DSS and D2D secondary synchronization signal SD2DSS；Wherein, the PD2DSS and
The SD2DSS is sent in the form of sequence, and the sequence type of the PD2DSS is M, and M is the positive integer less than or equal to 3；Institute
The sequence type for stating SD2DSS is N, and N is the positive integer more than or equal to the sum of RB corresponding to D2D transmission bandwidth；
Frequency domain position of the PD2DSCH in subframe is determined by the D2DSS, comprising: a D2DSS is one corresponding in subframe
Or multiple PD2DSCH；The D2DSS indicates respectively each PD2DSCH occupied starting resource block RB in subframe frequency domain
Index and occupied RB number；
The D2DSS indicates respectively each PD2DSCH occupied starting RB index and occupied in subframe frequency domain
RB number, comprising: a corresponding PD2DSCH occupied RB number in subframe frequency domain of every kind of sequence of the PD2DSS；
The a corresponding PD2DSCH occupied starting RB index in subframe frequency domain of every kind of sequence of the SD2DSS.
2. the method as described in claim 1, it is characterised in that:
Every kind of sequence of the SD2DSS corresponds to each PD2DSCH occupied starting RB index in subframe frequency domain, comprising:
If N is equal to the sum of RB corresponding to D2DSS transmission bandwidth, the N kind sequence of the SD2DSS is corresponding each
PD2DSCH occupied starting RB index in subframe frequency domain；
If N is greater than the sum of RB corresponding to D2DSS transmission bandwidth, the value L obtained using N to the RB sum modulus, institute
The L kind sequence for stating SD2DSS corresponds to PD2DSCH occupied starting RB index in subframe frequency domain, wherein the L is small
In the positive integer for being equal to RB sum corresponding to D2DSS transmission bandwidth.
3. method according to claim 1 or 2, it is characterised in that: the method also includes:
When sending the PD2DSCH, the PD2DSCH symbol of the time domain shared by the PD2DSS or the SD2DSS in the time domain
The one or more consecutive available SC- of first available he Single Carrier-Frequency Division multiple access SC-FDMA sign-on after or before number
It is sent on FDMA symbol, wherein the number of one or more consecutive available SC-FDMA symbol is by net shared by the PD2DSCH
The preparatory fixed configurations in network side.
4. method as claimed in claim 3, it is characterised in that: one or more consecutive available SC- shared by the PD2DSCH
The number of FDMA symbol is 4 or 5 or 6.
5. method according to claim 1 or 2, it is characterised in that: the method also includes:
Without under covering scene, D2D transmitting terminal monitors the available resources of D2DSS, if listening to idling-resource, selects
One idle resource sends the D2DSS and PD2DSCH；If not listening to available resources, lower a period of time is waited
Quarter monitors again；Or have under covering/part covering scene, D2D transmitting terminal is sent in the available resources that network side is dispatched
D2DSS。
6. a kind of transmission method of device-to-device communication synchronization channel, comprising:
The receiving end device-to-device D2D receives the device-to-device synchronization signal D2DSS sent from D2D transmitting terminal and physics is set
It is standby to arrive equipment synchronizing channel PD2DSCH, wherein when receiving the PD2DSCH, in the frequency domain position determined by the D2DSS
Upper reception PD2DSCH；
The D2DSS includes: D2D primary synchronization signal PD2DSS and D2D secondary synchronization signal SD2DSS；Wherein, PD2DSS and
SD2DSS is received in the form of sequence, and the sequence type of PD2DSS is M, and M is the positive integer less than or equal to 3；The sequence of SD2DSS
Column type is N, and N is the positive integer more than or equal to the sum of RB corresponding to D2D transmission bandwidth；
It is described to receive PD2DSCH on the frequency domain position determined by the D2DSS, comprising: the sequence for obtaining SD2DSS is corresponding
PD2DSCH in subframe frequency domain the corresponding PD2DSCH of sequence of occupied starting resource block RB index and PD2DSS in son
Occupied RB number in frame frequency domain；Described in being received on the starting RB index and the corresponding frequency domain position of the RB number
PD2DSCH。
7. method as claimed in claim 6, it is characterised in that: the method also includes:
First available SC-FDMA shared by the PD2DSS or the SD2DSS after or before time-domain symbol in the time domain
It is received on continuous 4 or 5 or 6 available SC-FDMA symbols of sign-on and demodulates the PD2DSCH.
8. the method for claim 7, it is characterised in that: the method also includes:
The receiving end D2D monitors and receives D2DSS in all D2DSS available resources, completes the preliminary time-frequency between transmitting terminal
Rate is synchronous；
After receiving and demodulating the PD2DSCH, the reception to Traffic Channel is completed according to the information in the PD2DSCH.
9. a kind of transmitting terminal of device-to-device communication, comprising:
Generation module, for generating device to equipment synchronization signal D2DSS and physical equipment to equipment synchronizing channel PD2DSCH；
The D2DSS includes: D2D primary synchronization signal PD2DSS and D2D secondary synchronization signal SD2DSS；Wherein, the PD2DSS and described
SD2DSS is sent in the form of sequence, and the sequence type of the PD2DSS is M, and M is the positive integer less than or equal to 3；It is described
The sequence type of SD2DSS is N, and N is the positive integer more than or equal to the sum of RB corresponding to D2D transmission bandwidth；
Sending module, for sending device to equipment synchronization signal D2DSS and physical equipment to equipment synchronizing channel PD2DSCH；
Wherein, when sending the PD2DSCH, frequency domain position of the PD2DSCH in subframe is determined by the D2DSS；
The sending module is used for when sending the PD2DSCH, and frequency domain position of the PD2DSCH in subframe is by the D2DSS
It determines, comprising: when sending the PD2DSCH, the corresponding one or more PD2DSCH of a D2DSS in subframe；The D2DSS
Indicate respectively each PD2DSCH occupied starting resource block RB index and occupied RB number in subframe frequency domain；
The sending module is used for when sending the PD2DSCH, and the D2DSS indicates respectively each PD2DSCH in subframe
Occupied starting RB index and occupied RB number on frequency domain, comprising: every kind of sequence of the PD2DSS is one corresponding
PD2DSCH occupied RB number in subframe frequency domain；The corresponding PD2DSCH of every kind of sequence of the SD2DSS is in subframe
Occupied starting RB index in frequency domain.
10. transmitting terminal as claimed in claim 9, it is characterised in that:
Every kind of sequence of the SD2DSS corresponds to each PD2DSCH occupied starting RB index in subframe frequency domain, comprising:
If N is less than or equal to the sum of RB corresponding to D2DSS transmission bandwidth, the N kind sequence of the SD2DSS is corresponding each
PD2DSCH occupied starting RB index in subframe frequency domain；
If N is greater than the sum of RB corresponding to D2DSS transmission bandwidth, the value L obtained using N to the RB sum modulus, institute
The L kind sequence for stating SD2DSS corresponds to PD2DSCH occupied starting RB index in subframe frequency domain, the L be less than etc.
The positive integer of the sum of the RB corresponding to D2DSS transmission bandwidth.
11. the transmitting terminal as described in claim 9 or 10, it is characterised in that:
The sending module is also used to when sending the PD2DSCH, the PD2DSCH in the time domain from the PD2DSS or
First available he Single Carrier-Frequency Division multiple access SC-FDMA sign-on after or before time-domain symbol shared by the SD2DSS
It is sent on one or more consecutive available SC-FDMA symbol, wherein continuous 4 or 5 or 6 can be used shared by the PD2DSCH
The number of SC-FDMA symbol is by the preparatory fixed configurations of network side.
12. the transmitting terminal as described in claim 9 or 10, it is characterised in that: further include:
Resource selection module, for monitoring the available resources of D2DSS, if listening to the free time under no covering scene
Resource then selects an idle resource notification sending module to send the D2DSS and PD2DSCH；If do not monitored
To available resources, then subsequent time is waited to monitor again；Or under covering/part covering scene, using network side scheduling
Available resources notice sending module sends D2DSS in the available resources that network side is dispatched.
13. a kind of receiving end of device-to-device communication, comprising:
Receiving module, it is same to equipment for receiving device-to-device synchronization signal D2DSS and physical equipment from D2D transmitting terminal
Walk channel PD2DSCH, wherein when receiving the PD2DSCH, receive on the frequency domain position determined by the D2DSS
PD2DSCH；The D2DSS includes: D2D primary synchronization signal PD2DSS and D2D secondary synchronization signal SD2DSS；Wherein, PD2DSS and
SD2DSS is received in the form of sequence, and the sequence type of PD2DSS is M, and M is the positive integer less than or equal to 3；The sequence of SD2DSS
Column type is N, and N is the positive integer more than or equal to the sum of RB corresponding to D2D transmission bandwidth；
Processing module for demodulating to the PD2DSCH received, and is completed according to the information in the PD2DSCH to industry
The reception of business channel；
The receiving module is used for when receiving the PD2DSCH, is received on the frequency domain position determined by the D2DSS
PD2DSCH, comprising: obtain the corresponding PD2DSCH of sequence of the SD2DSS occupied starting resource block RB in subframe frequency domain
Index PD2DSCH occupied RB number in subframe frequency domain corresponding with the sequence of PD2DSS；In the starting RB index
Above-mentioned PD2DSCH is received on corresponding frequency domain position with the RB number.
14. receiving end as claimed in claim 13, it is characterised in that:
The receiving module is also used to when receiving the PD2DSCH, in the time domain from the PD2DSS or SD2DSS institute
Continuous 4 or 5 or 6 available SC-FDMA symbols of first available SC-FDMA sign-on after or before accounting for time-domain symbol
Upper reception simultaneously demodulates the PD2DSCH.
15. receiving end as claimed in claim 14, it is characterised in that: the receiving module includes:
First module is completed preliminary between transmitting terminal for monitoring and receiving D2DSS in all D2DSS available resources
When Frequency Synchronization；
Second module, for receiving PD2DSCH on the frequency domain position determined by the D2DSS.
16. a kind of Transmission system of device-to-device communication synchronization channel, comprising: the transmitting terminal as described in claim 9~12
With the receiving end as described in claim 13~15.
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| CN201410036816.XA CN104812053B (en) | 2014-01-24 | 2014-01-24 | The transmission method and system, transmitting terminal and receiving end of D2D communication synchronization channel |
| PCT/CN2014/081868 WO2015109773A1 (en) | 2014-01-24 | 2014-07-09 | Synchronization channel transmission method and system for d2d communication, transmit end and receive end |
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| CN201410036816.XA CN104812053B (en) | 2014-01-24 | 2014-01-24 | The transmission method and system, transmitting terminal and receiving end of D2D communication synchronization channel |
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| CN104796367B (en) * | 2014-01-16 | 2018-06-26 | 电信科学技术研究院 | A kind of sending method of synchronizing information, detection method and user equipment |
| WO2017026518A1 (en) * | 2015-08-13 | 2017-02-16 | 株式会社Ｎｔｔドコモ | User device and signal synchronization method |
| CN106559877B (en) * | 2015-09-24 | 2019-02-26 | 中兴通讯股份有限公司 | The sending method and device of car networking business, resource allocation method and device |
| CN107645742A (en) * | 2016-07-20 | 2018-01-30 | 普天信息技术有限公司 | A kind of car exchanges the transmission method of V2X business with the information in the external world |
| CN109565383B (en) * | 2016-08-03 | 2022-03-01 | 联想创新有限公司（香港) | Device-to-device transfer |
| KR20180036565A (en) * | 2016-09-30 | 2018-04-09 | 주식회사 케이티 | Method and apparatus for configuring synchronization signal for new radio access technology |
| EP3739976B1 (en) | 2018-02-09 | 2022-08-03 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Method and device for transmitting synchronization signals, and computer storage medium |
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