CN104488321B - The method and apparatus for transmitting Discovery signal - Google Patents
The method and apparatus for transmitting Discovery signal Download PDFInfo
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- CN104488321B CN104488321B CN201380035268.2A CN201380035268A CN104488321B CN 104488321 B CN104488321 B CN 104488321B CN 201380035268 A CN201380035268 A CN 201380035268A CN 104488321 B CN104488321 B CN 104488321B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/005—Discovery of network devices, e.g. terminals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
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Abstract
The embodiment of the present invention provides a kind of method and apparatus for transmitting Discovery signal.This method comprises: the transmission location according to the first user equipment in a upper Discovery frame, determines transmission location of the first UE in current Discovery frame；Wherein, the first user equipment in current Discovery frame transmission location and transmission location of first user equipment in a upper Discovery frame it is not identical in frequency；If the first user equipment in a upper Discovery frame transmission location and transmission location of the second user equipment in a upper Discovery frame it is identical in time, the first user equipment in current Discovery frame transmission location and transmission location of the second user equipment in current Discovery frame it is not identical in time；In the first user equipment on the transmission location in current Discovery frame, Discovery signal is transmitted.The embodiment of the present invention mitigates the burden of UE transmission Discovery signal, reduces the production cost of UE.
Description
Technical field
The present invention relates to the communication technology more particularly to a kind of method and apparatus for transmitting Discovery signal.
Background technique
Device-to-device (Device to Device, abbreviation D2D) communication refer to user equipment (User Equipment,
Abbreviation UE) between directly communicated, need not move through base station forwarding.Mutual direct communication is realized between UE, it is necessary to
First mutually discovery.Each UE needs to send Discovery signal to allow other UE to find oneself.The discovery that all UE are sent
(Discovery) signal is identical by some band occupancies, and the duration is identical, disjoint Discovery frame composition on the time.
Each Discovery frame is divided into m frequency cells from frequency, and m is positive integer, and i is the number of frequency cells, and i is less than m's
Nonnegative integer；Each Discovery frame is divided into n time quantum from the time, and n is positive integer, and j is the number of time quantum, j
For the nonnegative integer less than n.The unit when friendship of i-th frequency cells and j-th of time quantum is referred to as (i, j) a frequency.Each
Unit when 1 frequency is used only in UE in a Discovery frame.It is numerous in view of UE number, it is generally the case that m is not more than n.
If some UE unit in the frequency that t-th of Discovery frame uses is (it, jt).Claim sequence (i0, j0)(i1, j1)(i2,
j2)......(it, jt) it is a Discovery resource, claim (it, jt) a frequency when unit be the Discovery resource in t
The position when frequency of frame.
Under normal conditions, it needs to jump when carrying out frequency to the Discovery signal that each UE is sent, i.e., the UE is used
Discovery resource in every frame frequency/when position it is different so that each UE has the opportunity to be found by other all UE.
The prior art provides a kind of technical solution, and when determining transmission location of the UE in current Discovery frame, UE is needed
It is to be understood that current Discovery frame frame number and/or the UE initial frequency when position, according to the frame number of current Discovery frame
And/or the initial transmission position of the UE, determine UE in the transmission location of present frame.Therefore, it is necessary to design special method to make UE
Obtain current Discovery frame frame number and/or the Discovery resource initial frequency when position.Thus, increase system
Complexity increases UE transmission and listens to the burden of Discovery signal.
Summary of the invention
The embodiment of the present invention provides a kind of method and apparatus for transmitting Discovery signal, for jumping Discovery
In the case where the transmission location of signal, the complexity of system is reduced.
In a first aspect, the embodiment of the present invention provides a kind of method for transmitting Discovery signal, comprising:
According to transmission location of first user equipment in a upper Discovery frame, determine the first UE current
Transmission location in Discovery frame；
Wherein, transmission location of first user equipment in current Discovery frame is according only to first user
Transmission location of the equipment in a upper Discovery frame determines；First user equipment is in current Discovery frame
Transmission location and transmission location of first user equipment in a upper Discovery frame be not identical in frequency；If
Transmission location of first user equipment in a upper Discovery frame and second user equipment are at upper one
Transmission location in Discovery frame is identical in time, then biography of first user equipment in current Discovery frame
Defeated position and transmission location of the second user equipment in current Discovery frame be not identical in time；
In first user equipment on the transmission location in current Discovery frame, Discovery signal is transmitted.
With reference to first aspect, in the first possible implementation, according to the first user equipment at upper one
Transmission location in Discovery frame determines transmission location of first user equipment in current Discovery frame, packet
It includes:
According to formula (it, jt)=f (it-1, jt-1)=((ait-1+ e) mod m, (cit-1+djt-1+ g) mod n), determine institute
State transmission location of first user equipment in current Discovery frame；
Wherein, t is the frame number of current Discovery frame, and t-1 is the frame number of a upper Discovery frame, and the i is small
In the nonnegative integer of m, itIndicate first user equipment in the number of the frequency cells of current Discovery frame, it-1It indicates
For first user equipment in the number of the frequency cells of a upper Discovery frame, j is the nonnegative integer less than n, jtIt indicates
Number of first user equipment in the time quantum of current Discovery frame, jt-1Indicate first user equipment upper
The number of the time quantum of one Discovery frame；The m and n is positive integer, and the m is less than or equal to described
n；The m is unit sum of the Discovery frame in frequency, and the n is the unit sum of Discovery frame in time；
The mod is modulo operation symbol；
Wherein, a, c, d, e, f are integer, and a and m are coprime, and c and n are coprime, and d and n are coprime.
With reference to first aspect, in the second possible implementation, according to the first user equipment at upper one
Transmission location in Discovery frame determines transmission location of first user equipment in current Discovery frame, packet
It includes:
According to formula (it, jt)=f (it-1, jt-1)=((a it-1+b jt-1+ e) mod m, (kc it-1+d jt-1+g)mod
N), Discovery resource position in the frequency of current Discovery frame is determined；
Wherein, t is the frame number of current Discovery frame, and t-1 is the frame number of a upper Discovery frame, and the i is small
In the nonnegative integer of m, itIndicate the Discovery resource in the number of the frequency cells of current Discovery frame, it-1Table
Show first user equipment in the number of the frequency cells of a upper Discovery frame, j is the nonnegative integer less than n, jtTable
Show the Discovery resource in the number of the time quantum of current Discovery frame, jt-1Indicate first user equipment
In the number of the time quantum of a upper Discovery frame；The m and n is positive integer, and the m divide exactly it is described
n；The m is unit sum of the Discovery frame in frequency, and the n is the unit sum of Discovery frame in time；
The mod is modulo operation symbol；
Wherein a, b, c, d, e, g are integer, and a and k are coprime, and d and k are coprime, and c and m are coprime, and ad-kbc and m are coprime, that is, a ×
D-k × b × c and m are coprime.
With reference to first aspect or the first possible implementation of first aspect and second may implementation, the
In three kinds of possible implementations, in first user equipment on the transmission location in current Discovery frame, transmission
Before Discovery signal, the method also includes:
First user equipment detects N number of Discovery frame before the current Discovery frame, determines in institute
The corresponding transmission location of first user equipment described in N number of Discovery frame before stating current Discovery frame is not made
With, wherein N is nonnegative integer.
Second aspect, the embodiment of the present invention provide a kind of device for transmitting Discovery signal, comprising:
Determining module determines the first user equipment current for the transmission location in a upper Discovery frame
Transmission location in Discovery frame；Described device is set to inside first user equipment or described device is described the
One user equipment；
Wherein, transmission location of first user equipment in current Discovery frame is according only to first user
Transmission location of the equipment in a upper Discovery frame determines；First user equipment is in current Discovery frame
Transmission location and transmission location of first user equipment in a upper Discovery frame be not identical in frequency；If
Transmission location of first user equipment in a upper Discovery frame and second user equipment are at upper one
Transmission location in Discovery frame is identical in time, then biography of first user equipment in current Discovery frame
Defeated position and transmission location of the second user equipment in current Discovery frame be not identical in time；
Transmission module, for the transmission location in first user equipment in current Discovery frame, transmission
Discovery signal.
In conjunction with second aspect, in the first possible implementation, the determining module is specifically used for according to formula
(it, jt)=f (it-1, jt-1)=((ait-1+ e) mod m, (cit-1+djt-1+ g) mod n), determine that first user equipment exists
Transmission location in current Discovery frame；
Wherein, t is the frame number of current Discovery frame, and t-1 is the frame number of a upper Discovery frame, and the i is small
In the nonnegative integer of m, itIndicate first user equipment in the number of the frequency cells of current Discovery frame, it-1It indicates
For first user equipment in the number of the frequency cells of a upper Discovery frame, j is the nonnegative integer less than n, jtIt indicates
Number of first user equipment in the time quantum of current Discovery frame, jt-1Indicate first user equipment upper
The number of the time quantum of one Discovery frame；The m and n is positive integer, and the m is less than or equal to described
n；The m is unit sum of the Discovery frame in frequency, and the n is the unit sum of Discovery frame in time；
The mod is modulo operation symbol；
Wherein, a, c, d, e, f are integer, and a and m are coprime, and c and n are coprime, and d and n are coprime.
In conjunction with second aspect, in the second possible implementation, the determining module is specifically used for according to formula
(it, jt)=f (it-1, jt-1)=((a it-1+b jt-1+ e) mod m, (kc it-1+d jt-1+ g) mod n), determine described in
Discovery resource position in the frequency of current Discovery frame；
Wherein, t is the frame number of current Discovery frame, and t-1 is the frame number of a upper Discovery frame, and the i is small
In the nonnegative integer of m, itIndicate the Discovery resource in the number of the frequency cells of current Discovery frame, it-1Table
Show first user equipment in the number of the frequency cells of a upper Discovery frame, j is the nonnegative integer less than n, jtTable
Show the Discovery resource in the number of the time quantum of current Discovery frame, jt-1Indicate first user equipment
In the number of the time quantum of a upper Discovery frame；The m and n is positive integer, and the m divide exactly it is described
n；The m is unit sum of the Discovery frame in frequency, and the n is the unit sum of Discovery frame in time；
The mod is modulo operation symbol；
Wherein, a, b, c, d, e, g are integer, and a and k are coprime, and d and k are coprime, and c and m are coprime, and ad-kbc and m are coprime, that is, a
× d-k × b × c and m are coprime.
In conjunction with second aspect or second aspect the first or be able to achieve mode and second may implementation,
In the third possible implementation, detection module, for the biography in first user equipment in current Discovery frame
On defeated position, before transmitting Discovery signal, N number of Discovery frame before the current Discovery frame is detected, really
It is scheduled on the corresponding transmission location of the first user equipment described in N number of Discovery frame before the current Discovery frame not
It is used, wherein N is nonnegative integer.
The third aspect, the embodiment of the present invention also provide a kind of first user equipment, comprising:
Processor determines the first user equipment current for the transmission location in a upper Discovery frame
Transmission location in Discovery frame；
Wherein, transmission location of first user equipment in current Discovery frame is according only to first user
Transmission location of the equipment in a upper Discovery frame determines；First user equipment is in current Discovery frame
Transmission location and transmission location of first user equipment in a upper Discovery frame be not identical in frequency；If
Transmission location of first user equipment in a upper Discovery frame and second user equipment are at upper one
Transmission location in Discovery frame is identical in time, then biography of first user equipment in current Discovery frame
Defeated position and transmission location of the second user equipment in current Discovery frame be not identical in time；
Transceiver, for the transmission location in first user equipment in current Discovery frame, transmission
Discovery signal.
In conjunction with the third aspect, in the first possible implementation, the processor is specifically used for according to formula (it, jt)
=f (it-1, jt-1)=((ait-1+ e) mod m, (cit-1+djt-1+ g) mod n), determine first user equipment current
Transmission location in Discovery frame；
Wherein, t is the frame number of current Discovery frame, and t-1 is the frame number of a upper Discovery frame, and the i is small
In the nonnegative integer of m, itIndicate first user equipment in the number of the frequency cells of current Discovery frame, it-1It indicates
For first user equipment in the number of the frequency cells of a upper Discovery frame, j is the nonnegative integer less than n, jtIt indicates
Number of first user equipment in the time quantum of current Discovery frame, jt-1Indicate first user equipment upper
The number of the time quantum of one Discovery frame；The m and n is positive integer, and the m is less than or equal to described
n；The m is unit sum of the Discovery frame in frequency, and the n is the unit sum of Discovery frame in time；
The mod is modulo operation symbol；
Wherein, a, c, d, e, f are integer, and a and m are coprime, and c and n are coprime, and d and n are coprime.
In conjunction with the third aspect, in second of possible implementation, the processor is specifically used for according to formula (it, jt)
=f (it-1, jt-1)=((a it-1+b jt-1+ e) mod m, (kc it-1+d jt-1+ g) mod n), determine the Discovery
Resource position in the frequency of current Discovery frame；
Wherein, t is the frame number of current Discovery frame, and t-1 is the frame number of a upper Discovery frame, and the i is small
In the nonnegative integer of m, itIndicate the Discovery resource in the number of the frequency cells of current Discovery frame, it-1Table
Show first user equipment in the number of the frequency cells of a upper Discovery frame, j is the nonnegative integer less than n, jtTable
Show the Discovery resource in the number of the time quantum of current Discovery frame, jt-1Indicate first user equipment
In the number of the time quantum of a upper Discovery frame；The m and n is positive integer, and the m divide exactly it is described
n；The m is unit sum of the Discovery frame in frequency, and the n is the unit sum of Discovery frame in time；
The mod is modulo operation symbol；
Wherein a, b, c, d, e, g are integer, and a and k are coprime, and d and k are coprime, and c and m are coprime, and ad-kbc and m are coprime, that is, a ×
D-k × b × c and m are coprime.
In conjunction with the first of the third aspect or the third aspect and second or can implementation in, the processor, also
For the transmission location in first user equipment in current Discovery frame, before transmitting Discovery signal,
N number of Discovery frame before the current Discovery frame is detected, determines the N before the current Discovery frame
The corresponding transmission location of first user equipment described in a Discovery frame is not used by, wherein N is nonnegative integer.
In above-mentioned technical proposal, the first UE in the frequency of current Discovery frame position according to the first UE at upper one
The transmission location of Discovery frame determines, with the frame number of current Discovery frame and the initial transmission position of Discovery resource
Set unrelated, the first UE need to only know the first UE in the transmission location of a upper Discovery frame, not need to obtain current
The initial transmission position of the frame number of Discovery frame and the first UE, so that it may determine the first UE in the transmission location of present frame, because
This, reduces the complexity of system, alleviates the first UE transmission and listens to the burden of Discovery signal.Due to each
In Discovery frame, if the first UE is in the transmission location of a upper Discovery frame and the 2nd UE at upper one
The transmission location of Discovery frame is identical in time, then transmission location and twoth UE of the first UE in current Discovery frame
It is not identical in time in the transmission location of current Discovery frame, and transmission of the first UE in current Discovery frame
Position and transmission location of the first UE in a upper Discovery frame be not identical in frequency, so that each UE was sent
Discovery signal can be found by other UE.
Detailed description of the invention
Fig. 1 is a kind of method flow diagram for transmitting Discovery signal provided in an embodiment of the present invention；
Fig. 2A is the method flow diagram of another transmission Discovery signal provided in an embodiment of the present invention；
Fig. 2 B is a kind of Discovery frame pattern schematic diagram that the method provided according to Fig. 2A generates；
Fig. 3 A is the method flow diagram of another transmission Discovery signal provided in an embodiment of the present invention；
Fig. 3 B is a kind of Discovery frame pattern schematic diagram that the method provided according to Fig. 3 A generates；
Fig. 4 A is a kind of apparatus structure schematic diagram for transmitting Discovery signal provided in an embodiment of the present invention；
Fig. 4 B is the apparatus structure schematic diagram of another transmission Discovery signal provided in an embodiment of the present invention；
Fig. 5 is a kind of first user device architecture schematic diagram provided in an embodiment of the present invention.
Specific embodiment
Fig. 1 provides a kind of method flow diagram for transmitting Discovery signal for the embodiment of the present invention.The execution of the present embodiment
The UE that main body can be transmission Discovery signal is also possible to receive the UE of Discovery signal.As shown in Figure 1, this implementation
Example provide method include:
Step 11: the first UE, in the transmission location of a upper Discovery frame, determines that the first UE exists according to the first UE
The transmission location of current Discovery frame；Wherein, the first UE meets following in the transmission location of current Discovery frame
Condition a and b.Wherein, the position when transmission location can be the frequency of the first UE transmission Discovery signal.
If the first UE is the UE for sending Discovery signal, some transmission location is found in a upper Discovery frame
When idle, Discovery signal can be sent on the transmission location of current Discovery frame, at this point, upper one
Some free transfer position of Discovery frame is known as the first UE in the transmission location of a upper Discovery frame.First UE exists
Before sending Discovery signal on current Discovery frame, technical solution provided in an embodiment of the present invention, root can be used
According to the first UE in the transmission location of a upper Discovery frame, determine the first UE in the transmission location of current Discovery frame.
Working as in addition, the first UE after a upper Discovery frame finds that some transmission location is idle, can also continue to the first UE of detection
Whether the transmission location of preceding Discovery frame and next Discovery frame is idle, detects the first UE in current Discovery
When whether the transmission location of frame and next Discovery frame is idle, the first UE can also use provided in an embodiment of the present invention
Technical solution determines the first UE in current Discovery frame according to the first UE in the transmission location of a upper Discovery frame
Transmission location.The first UE is being detected after the transmission location of at least one Discovery frame is idle, the first UE can be sent out
Send Discovery signal.
If the first UE is the UE for listening to Discovery signal, listened in some transmission of a upper Discovery frame
The Discovery signal sent to the 2nd UE, in order to continue to listen on the transmission location of current Discovery frame
Discovery signal, the first UE can also use technical solution provided in an embodiment of the present invention, according to the first UE at upper one
The transmission location of Discovery frame determines the UE in the transmission location of current Discovery frame.At this point, the first UE is at upper one
The transmission location of Discovery frame is the Discovery that the first UE listens to the 2nd UE transmission on a upper Discovery frame
The transmission location of signal, the first UE listen for the first UE in current Discovery frame celestial being in the transmission location of current Discovery frame
The transmission location for the Discovery signal that other UE are sent.In the embodiment of the present invention, the first UE is in each Discovery frame
Position is all satisfied condition A and B when frequency.Condition A is transmission location of the first UE in current Discovery frame according only to the first UE
Transmission location in a upper Discovery frame determines.Condition B is if the first UE is in a upper Discovery frame
Transmission location and transmission location of the 2nd UE in a upper Discovery frame are identical in time, then the first UE is current
Transmission location and transmission location of the 2nd UE in current Discovery frame in Discovery frame be not identical in time.?
That is if two UE transmit Discovery signal on the time identical transmission location of a upper Discovery frame,
Then on current Discovery frame, the two UE transmit Discovery signal on different transmission location in different times.
To make the first UE meet above-mentioned condition in position in the frequency of each Discovery frame, it can design and map one by one
Function f.First UE is according to (it, jt)=f (it-1, jt-1)=((it-1, jt-1), (it-1, jt-1)) or (it, jt)=f (it-1,
jt-1)=(f3(it-1), f4(it-1, jt-1)) calculate oneself position in the frequency of each Discovery frame.
Preferably, function f is indicated are as follows: Z/mZ × Z/nZ → Z/mZ × Z/；
(i, j) → (f1(i, f2(i)
Wherein, it is component of the f in frequency, is the component of f in time.M is unit of the Discovery frame in frequency
Sum, n are the unit sum of Discovery frame in time,
Z/mZ=0,1 ..., m- indicates that the number of the frequency cells of Discovery frame is all,
{ 0,1 ..., n- indicates that the number of the time quantum of Discovery frame is all to Z/nZ=.For the symbol of operation of direct product
Indicate the direct product of set.J ∈ Z/nZ, i ∈ Z/r.I indicates the number of frequency cells of the UE in Discovery frame, and j indicates UE
The number of time quantum in Discovery frame.
F meets: if i ≠, then f2(i, j) ≠ f2(i ', for all
J ∈ Z/nZ, i ∈ Z/r, i ' ∈ Z/r.It is equivalent to, if transmission position of the first UE in a upper Discovery frame
Set identical in time as transmission location of the 2nd UE in a upper Discovery frame, then the first UE is current
Transmission location and transmission location of the 2nd UE in current Discovery frame in Discovery frame be not identical in time.
The meaning of the expression formula of function f is illustrated below:
If A, B is two nonempty sets, if there is a rule f, so as to each element a in A, by rule f,
The element f (a) that existence anduniquess determines in B is corresponding to it, then f is referred to as the mapping from A to B, is denoted as:
F:A → B
Such as:
F:(0,1) → (0,1)
Indicate that each element in open interval (0,1) is reflected square for oneself by mapping f.
Step 12: the first UE on position, transmits Discovery signal in frequency of the first UE in current Discovery frame.
Wherein, transmission Discovery signal includes sending Discovery signal and/or reception Discovery signal.
If the first UE is the UE for sending Discovery signal, the position in the frequency of current Discovery frame the first UE is determined
It postpones, in the first UE on the transmission location of current Discovery frame, sends Discovery signal.If the first UE is to receive
The UE of Discovery signal, when determining the first UE in the frequency of current Discovery frame behind position, in the first UE current
When the frequency of Discovery frame on position, Discovery signal is received.
Preferably, the first UE also meets the c: the one UE of the following conditions in the transmission location of current Discovery frame and exists
The transmission location of transmission location and the first UE in a upper Discovery frame in current Discovery frame in frequency not
It is identical, frequency diversity gain may be implemented.For example, the channel of UE0 to UE3 is very serious in frequency cells i=0 decline, and UE0 is also
Discovery signal can be sent in other frequency cells, UE3 can have found what UE0 was sent in other frequency cells
Discovery signal.To meet frequency diversity low gain, above-mentioned function f meets: f1 (i, j) ≠ i, for all i,.
Optionally, in the first UE on the transmission location in current Discovery frame, Discovery signal is transmitted
Before, detect N number of Discovery frame before the current Discovery frame, determine the current Discovery frame it
The corresponding transmission location of first UE described in preceding N number of Discovery frame is not used by, wherein N is nonnegative integer.
In above-mentioned technical proposal, the first UE in the frequency of current Discovery frame position according to the first UE at upper one
The transmission location of Discovery frame determines, with the frame number of current Discovery frame and the initial transmission position of Discovery resource
Set unrelated, the first UE need to only know the first UE in the transmission location of a upper Discovery frame, not need to obtain current
The initial transmission position of the frame number of Discovery frame and the first UE, so that it may determine the first UE in the transmission location of present frame, because
This, reduces the complexity of system, alleviates the first UE transmission and listens to the burden of Discovery signal.Due to each
In Discovery frame, if the first UE is in the transmission location of a upper Discovery frame and the 2nd UE at upper one
The transmission location of Discovery frame is identical in time, then transmission location and twoth UE of the first UE in current Discovery frame
It is not identical in time in the transmission location of current Discovery frame, and transmission of the first UE in current Discovery frame
Position and transmission location of the first UE in a upper Discovery frame be not identical in frequency, so that each UE was sent
Discovery signal can be found by other UE.
Fig. 2A is the method flow diagram of another transmission Discovery signal provided in an embodiment of the present invention.The present embodiment
Executing subject can be send Discovery signal UE be also possible to receive Discovery signal UE.Such as Fig. 2A institute
Show, method provided in this embodiment includes:
Step 21:UE is according to formula (it, jt)=f (it-1, jt-1)=((ait-1+ e) mod m, (cit-1+djt-1+g)mod
N), determine the UE current Discovery (it was found that) frequency of frame when position.
Wherein, t is the frame number of current Discovery frame, and t-1 is the frame number of a upper Discovery frame, and the i is small
In the nonnegative integer of m, itUE is indicated in the number of the frequency cells of current Discovery frame, j is the nonnegative integer less than n, jt
Indicate UE in the number of the time quantum of current Discovery frame；The m and n is positive integer, and the m is less than
Equal to the n；The m is unit sum of the Discovery frame in frequency, and n is that the unit of Discovery frame in time is total
Number.Mod is modulo operation.
Wherein, (it-1, jt-1) it is UE position, (i in the frequency of a upper Discovery framet, jt) it is UE current
The position when frequency of Discovery frame.
Wherein, a, c, d, e, f are integer, and a and m are coprime, and c and n are coprime, and d and n are coprime.
Function f is mapping function one by one, f meet if i ≠, then f2(i, j) ≠ f2(i ', for all j ∈ Z/nZ, i
∈ Z/r, i ' ∈ Z/r.Preferably, to realize frequency diversity gain, at least there is a prime number p, the p divides exactly a-1, the p
Divide exactly m, the p does not divide exactly e, so that f meets: f1 (i, j) ≠ i, for all i,.
For example, if m=n=3, a=c=d=e=1, g=0 are enabled, then (it, jt)=f (it-1, jt-1)=((it-1+
1) 3 mod, (it-1+jt-1)mod 3).With number 0,1 ..., the 8 Discovery resources of 9 UE indicated exist
Discovery frame t=0, position is as shown in Figure 2 B when 1,2,3 frequency.As shown in Figure 2 B, each Discovery frame is in frequency
There are 3 frequency cells, also there are 3 time quantums in time, each big box indicates a Discovery frame in Fig. 2 B,
Wherein it is classified as time, behavior frequency.
The 0th Discovery frame is indicated from left side number first big box in Fig. 2 B, it is big from left side number second in Fig. 2 B
Box indicates the 1st Discovery frame, indicates the 2nd Discovery frame, Fig. 2 B from the big box of left side number third in Fig. 2 B
In from left side number the 4th big box indicate the 3rd Discovery frame.
Referring to fig. 2 from first big box of left side number in B, UE0 in the frequency of the 0th Discovery frame position be (0,
0), the position in the frequency of the 0th Discovery frame UE1 is (0,1) ..., the position in the frequency of the 0th Discovery frame UE8
For (2,2).The big box of second left in B referring to fig. 2, the position in the frequency of the 1st Discovery frame UE0 is (1,0), UE1
In the frequency of the 1st Discovery frame position be (1,1) ..., UE8 in the frequency of the 1st Discovery frame position be (0,
1).From 2B it can also be seen that different UE are different from position in the frequency of each Discovery frame.
As shown in Figure 2 B, UE0, UE3 and UE6 in the time location of the 0th Discovery frame on time quantum 0, but
Be on the 1st Discovery frame, the time location of UE0 on time quantum 0, the time location of UE3 on time quantum 1,
The time location of UE6 is on time quantum 2.Therefore, same time of two or more UE in a upper Discovery frame
Discovery signal is sent on position sends Discovery on position in different times then on current Discovery frame
Signal.
As shown in Figure 2 B, UE0 in the frequency domain position of the 0th Discovery frame in frequency cells 0, and at the 1st
The frequency domain position of Discovery frame is in frequency cells 1.Therefore, the position in the frequency of current Discovery frame the first UE, with
The position in the frequency of a upper Discovery frame 2nd UE is not identical in frequency, so as to realize frequency diversity gain.
Step 22:UE on position, transmits Discovery signal in frequency of the UE in current Discovery frame.
In the present embodiment, according to formula (it, jt)=f (it-1, jt-1)=((ait-1+ e) mod m, (cit-1+djt-1+g)
Mod n), determine the position in the frequency of each Discovery frame UE, UE do not need to obtain the frame number of current Discovery frame and
Therefore position when the initial frequency of the UE alleviates the burden of UE transmission Discovery signal and the production cost of UE.
Fig. 3 A is the method flow diagram of another transmission Discovery signal provided in an embodiment of the present invention.The present embodiment
Executing subject can be send Discovery signal UE be also possible to receive Discovery signal UE.Such as Fig. 3 A institute
Show, method provided in this embodiment includes:
Step 31:UE is according to formula (it, jt)=f (it-1, jt-1)=((a it-1+b jt-1+ e) mod m, (kc it-1+d
jt-1+ g) mod n), determine the UE current Discovery (it was found that) frequency of frame when position.
Wherein, t is the frame number of current Discovery frame, and t-1 is the frame number of a upper Discovery frame, and the i is small
In the nonnegative integer of m, itThe UE is indicated in the number of the frequency cells of current Discovery frame, j is non-negative whole less than n
Number, jtIndicate the UE in the number of the time quantum of current Discovery frame；The m and n is positive integer, and
The m divides exactly the n, m=nk；The m be Discovery frame in frequency unit sum, n be Discovery frame when
Between on unit sum.Mod is modulo operation symbol.
Wherein, (it-1, jt-1) it is UE position, (i in the frequency of a upper Discovery framet, jt) it is UE current
The position when frequency of Discovery frame；
Wherein, a, b, c, d, e, g are integer, and a and k are coprime, and d and k are coprime, and c and m are coprime, and ad-kbc and m are coprime, that is, a
× d-k × b × c and m are coprime.
Function f is mapping function one by one, f meet ifi ≠, then f2(i, j) ≠ f2(i ', for all j ∈ Z/nZ, i ∈
Z/r, i ' ∈ Z/r.Preferably, to realize frequency diversity gain, at least there is a prime number p, the p divides exactly b, and the p is divided exactly
M, the p divide exactly a-1, and the p does not divide exactly e, so that f meets: f1 (i, j) ≠ i, for all i,.
For example, if m=n=4, k=1, a=3, b=2, c=-1, d=e=g=1, (i are enabledt, jt)=f (it-1,
jt-1)=((3 it-1+2 jt-1+ 1) 4 mod, (it-1+jt-1+1)mod 4)。
With hexadecimal digit 0,1 ..., the Discovery resource for 16 UE that f is indicated is in Discovery frame t=
0,1,2,3,4 position is as shown in Figure 3B.As shown in Figure 3B, each Discovery frame has 4 frequency cells in frequency,
Also there are 4 time quantums on time, each big box indicates a Discovery frame in Fig. 3 B, wherein it is classified as the time, behavior
Frequency.
As can be seen from Figure 3B, different UE resources are different from position in the frequency of each Discovery frame.Two UE
Discovery signal is sent on the same time position of a upper Discovery frame, then on current Discovery frame,
Discovery signal is sent on different time locations.Different UE not phase on position in the frequency of each Discovery frame
Together.
Step 32:UE on position, transmits Discovery signal in frequency of the UE in current Discovery frame.
In the present embodiment, according to formula 2:(it, jt)=f (it-1, jt-1)=((a it-1+b jt-1+ e) mod m, (kc
it-1+d jt-1+ g) mod n), determine the position in the frequency of each Discovery frame UE, UE does not need to obtain current
Therefore position when the initial frequency of the frame number of Discovery frame and UE alleviates the burden and UE of UE transmission Discovery signal
Production cost.
Fig. 4 A is a kind of apparatus structure schematic diagram for transmitting Discovery signal provided in an embodiment of the present invention.The device
It can be used to implement the above method, therefore, the feature in above method embodiment can be applied in the present embodiment.The device can
To be the first UE.As shown in Figure 4 A, device provided in this embodiment comprises determining that module 41 and transmission module 42.
Determining module 41 determines the first UE current for the transmission location in a upper Discovery frame
Transmission location in Discovery frame；Described device is set to inside the first UE or described device is the first UE.
Wherein, transmission location of the first UE in current Discovery frame is according only to the first UE at upper one
Transmission location in Discovery frame determines；If transmission location and of the first UE in a upper Discovery frame
Transmission location of two UE in a upper Discovery frame is identical in time, then the first UE is in current Discovery frame
In transmission location and transmission location of the 2nd UE in current Discovery frame it is not identical in time.Preferably, it is
Realize frequency diversity gain, transmission location of the first UE in current Discovery frame and the first UE are at upper one
Transmission location in Discovery frame is not identical in frequency.
Transmission module 42, for the transmission location in the first UE in current Discovery frame, transmission
Discovery signal.
Optionally, as shown in Figure 4 B, the device that Fig. 4 A is provided may also include that detection module 43.Detection module, in institute
The first UE is stated on the transmission location in current Discovery frame, before transmitting Discovery signal, is detected described current
N number of Discovery frame before Discovery frame determines N number of Discovery frame before the current Discovery frame
Described in the corresponding transmission location of the first UE be not used by, wherein N is nonnegative integer.
The present embodiment can be found in be described in Fig. 1 corresponding embodiment, and details are not described herein.
Optionally, there is also following embodiments:
The determining module is specifically used for formula (it, jt)=f (it-1, jt-1)=((ait-1+ e) mod m, (cit-1+
djt-1+ g) mod n), determine transmission location of the first UE in current Discovery frame；
Wherein, t is the frame number of current Discovery frame, and t-1 is the frame number of a upper Discovery frame, and the i is small
In the nonnegative integer of m, itIndicate the number of frequency cells of the first UE in current Discovery frame, it-1Indicate described
For one UE in the number of the frequency cells of a upper Discovery frame, j is the nonnegative integer less than n, jtIndicate that the first UE exists
The number of the time quantum of current Discovery frame, jt-1Indicate that the first UE is single in the time of a upper Discovery frame
The number of member；The m and n is positive integer, and the m is less than or equal to the n；The m is Discovery frame in frequency
Unit sum in rate, the n are the unit sum of Discovery frame in time；The mod is modulo operation symbol；
Wherein, a, c, d, e, f are integer, and a and m are coprime, and c and n are coprime, and d and n are coprime.
Preferably, at least there is a prime number p, the p divides exactly a-1, and the p divides exactly m, and the p does not divide exactly e, thus full
Sufficient condition: the position in the frequency of current Discovery frame the first UE, with the 2nd UE in a upper Discovery frame
Frequency when position it is not identical in frequency, realize frequency diversity gain.
The present embodiment can be found in be described in Fig. 2 corresponding embodiment, and details are not described herein.
Optionally, embodiment also may be present:
The determining module is specifically used for according to formula (it, jt)=f (it-1, jt-1)=((a it-1+b jt-1+e)mod
M, (kc it-1+d jt-1+ g) mod n), determine Discovery resource position in the frequency of current Discovery frame.
Wherein, t is the frame number of current Discovery frame, and t-1 is the frame number of a upper Discovery frame, and the i is small
In the nonnegative integer of m, itIndicate the Discovery resource in the number of the frequency cells of current Discovery frame, it-1Table
Show the first UE in the number of the frequency cells of a upper Discovery frame, j is the nonnegative integer less than n, jtDescribed in expression
Number of the Discovery resource in the time quantum of current Discovery frame, jt-1Indicate the first UE at upper one
The number of the time quantum of Discovery frame；The m and n is positive integer, and the m divides exactly the n；The m is
Unit sum of the Discovery frame in frequency, the n are the unit sum of Discovery frame in time；The mod is
Modulo operation symbol；
Wherein, a, b, c, d, e, g are integer, and a and k are coprime, and d and k are coprime, and c and m are coprime, and ad-kbc and m are coprime.
Preferably, at least there is a prime number p, the p divides exactly b, and the p divides exactly m, and the p divides exactly a-1, and the p is not whole
Except e, so that position when the frequency of the first UE be made to meet the following conditions: the position in the frequency of current Discovery frame the first UE,
In the frequency of a upper Discovery frame, position is not identical in frequency with the 2nd UE, realizes frequency diversity gain.
The present embodiment can be found in be described in Fig. 3 A corresponding embodiment, and details are not described herein.In above-mentioned technical proposal, the first UE
In the frequency of current Discovery frame, position is determined according to the first UE in the transmission location of a upper Discovery frame, and current
The frame number of Discovery frame and the initial transmission position of Discovery resource are unrelated, and the first UE need to only know the first UE upper one
The transmission location of a Discovery frame does not need the frame number for obtaining current Discovery frame and the initial transmission position of the first UE
It sets, so that it may determine that the first UE in the transmission location of present frame, therefore, reduces the complexity of system, alleviate the first UE transmission
And listen to the burden of Discovery signal.Due in each Discovery frame, if the first UE is in a upper Discovery
The transmission location of frame is identical in time in the transmission location of a upper Discovery frame as the 2nd UE, then the first UE is current
The transmission location of Discovery frame is not identical in time in the transmission location of current Discovery frame as the 2nd UE, and the
One UE is in the transmission location of transmission location and the first UE in a upper Discovery frame in current Discovery frame in frequency
It is not identical in rate, so that the Discovery signal that each UE is sent can be found by other UE.
Fig. 5 is a kind of first UE structural schematic diagram provided in an embodiment of the present invention.The user equipment can be used to implement
Method is stated, therefore, the feature in above method embodiment can be applied in the present embodiment.As shown in figure 5, the first UE includes:
Processor 51 and transceiver 52.
Processor 51 determines the first UE current for the transmission location in a upper Discovery frame
Transmission location in Discovery frame；
Wherein, transmission location of the first UE in current Discovery frame is according only to the first UE at upper one
Transmission location in Discovery frame determines；Transmission location and described first of first UE in current Discovery frame
Transmission location of the UE in a upper Discovery frame be not identical in frequency；If the first UE is at upper one
Transmission location and transmission location of the 2nd UE in a upper Discovery frame in Discovery frame is identical in time, then
Transmission location of first UE in current Discovery frame and transmission of the 2nd UE in current Discovery frame
Position is not identical in time；
Transceiver 52, for the transmission location in the first UE in current Discovery frame, transmission
Discovery signal.
Optionally, the processor is also used in the first UE on the transmission location in current Discovery frame,
Before transmitting Discovery signal, N number of Discovery frame before the current Discovery frame is detected, is determined described
The corresponding transmission location of first UE described in N number of Discovery frame before current Discovery frame is not used by, wherein N
For nonnegative integer.
The concrete function of processor and transceiver can be found in the present embodiment describes in Fig. 1 corresponding embodiment, herein no longer
It repeats.
Optionally, there is also following embodiments:
The processor is specifically used for according to formula (it, jt)=f (it-1, jt-1)=((ait-1+ e) mod m, (cit-1+
djt-1+ g) mod n), determine transmission location of the first UE in current Discovery frame；
Wherein, t is the frame number of current Discovery frame, and t-1 is the frame number of a upper Discovery frame, and the i is small
In the nonnegative integer of m, itIndicate the number of frequency cells of the first UE in current Discovery frame, it-1Indicate described
For one UE in the number of the frequency cells of a upper Discovery frame, j is the nonnegative integer less than n, jtIndicate that the first UE exists
The number of the time quantum of current Discovery frame, jt-1Indicate that the first UE is single in the time of a upper Discovery frame
The number of member；The m and n is positive integer, and the m is less than or equal to the n；The m is Discovery frame in frequency
Unit sum in rate, the n are the unit sum of Discovery frame in time；The mod is modulo operation symbol；
Wherein, a, c, d, e, f are integer, and a and m are coprime, and c and n are coprime, and d and n are coprime.Preferably, at least there is an element
Number p, the p divide exactly a-1, and the p divides exactly m, and the p does not divide exactly e.
The present embodiment can be found in be described in Fig. 2 corresponding embodiment, and details are not described herein.
Optionally, there is also following embodiments:
The processor is specifically used for according to formula (it, jt)=f (it-1, jt-1)=((a it-1+b jt-1+ e) mod m,
(kc it-1+d jt-1+ g) mod n), determine Discovery resource position in the frequency of current Discovery frame；
Wherein, t is the frame number of current Discovery frame, and t-1 is the frame number of a upper Discovery frame, and the i is small
In the nonnegative integer of m, itIndicate the Discovery resource in the number of the frequency cells of current Discovery frame, it-1Table
Show the first UE in the number of the frequency cells of a upper Discovery frame, j is the nonnegative integer less than n, jtDescribed in expression
Number of the Discovery resource in the time quantum of current Discovery frame, jt-1Indicate the first UE at upper one
The number of the time quantum of Discovery frame；The m and n is positive integer, and the m divides exactly the n；The m is
Unit sum of the Discovery frame in frequency, the n are the unit sum of Discovery frame in time；The mod is
Modulo operation symbol；
Wherein a, b, c, d, e, g are integer, and a and k are coprime, and d and k are coprime, and c and m are coprime, and ad-kbc and m are coprime.It is preferred that
At least there is a prime number p in ground, the p divides exactly b, and the p divides exactly m, and the p divides exactly a-1, and the p does not divide exactly e.
The present embodiment can be found in be described in Fig. 3 A corresponding embodiment, and details are not described herein.
In above-mentioned technical proposal, the first UE in the frequency of current Discovery frame position according to the first UE at upper one
The transmission location of Discovery frame determines, with the frame number of current Discovery frame and the initial transmission position of Discovery resource
Set unrelated, the first UE need to only know the first UE in the transmission location of a upper Discovery frame, not need to obtain current
The initial transmission position of the frame number of Discovery frame and the first UE, so that it may determine the first UE in the transmission location of present frame, because
This, reduces the complexity of system, alleviates the first UE transmission and listens to the burden of Discovery signal.Due to each
In Discovery frame, if the first UE is in the transmission location of a upper Discovery frame and the 2nd UE at upper one
The transmission location of Discovery frame is identical in time, then transmission location and twoth UE of the first UE in current Discovery frame
It is not identical in time in the transmission location of current Discovery frame, and transmission of the first UE in current Discovery frame
Position and transmission location of the first UE in a upper Discovery frame be not identical in frequency, so that each UE was sent
Discovery signal can be found by other UE.
Those of ordinary skill in the art will appreciate that: realize that all or part of the steps of above-mentioned each method embodiment can lead to
The relevant hardware of program instruction is crossed to complete.Program above-mentioned can be stored in a computer readable storage medium.The journey
When being executed, execution includes the steps that above-mentioned each method embodiment to sequence；And storage medium above-mentioned include: ROM, RAM, magnetic disk or
The various media that can store program code such as person's CD.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (18)
1. a kind of method of transmission discovery Discovery signal characterized by comprising
According to transmission location of first user equipment in a upper Discovery frame, determine that first user equipment is being worked as
Transmission location in preceding Discovery frame；
Wherein, transmission location of first user equipment in current Discovery frame is according only to first user equipment
Transmission location in a upper Discovery frame determines；Transmission of first user equipment in current Discovery frame
Position and transmission location of first user equipment in a upper Discovery frame be not identical in frequency；If described
Transmission location of first user equipment in a upper Discovery frame and second user equipment are in a upper Discovery frame
In transmission location it is identical in time, then transmission location and institute of first user equipment in current Discovery frame
It is not identical in time to state transmission location of the second user equipment in current Discovery frame；
In first user equipment on the transmission location in current Discovery frame, Discovery signal is transmitted.
2. the method according to claim 1, wherein according to the first user equipment in a upper Discovery frame
In transmission location, determine transmission location of first user equipment in current Discovery frame, comprising:
According to formula (it,jt)=f (it-1,jt-1)=((ait-1+ e) mod m, (cit-1+djt-1+ g) mod n), determine described
Transmission location of one user equipment in current Discovery frame；
Wherein, t is the frame number of current Discovery frame, and t-1 is the frame number of a upper Discovery frame, and the i is less than m's
Nonnegative integer, itIndicate first user equipment in the number of the frequency cells of current Discovery frame, it-1Described in expression
For first user equipment in the number of the frequency cells of a upper Discovery frame, j is the nonnegative integer less than n, jtDescribed in expression
Number of first user equipment in the time quantum of current Discovery frame, jt-1Indicate first user equipment at upper one
The number of the time quantum of Discovery frame；The m and n is positive integer, and the m is less than or equal to the n；Institute
Stating m is unit sum of the Discovery frame in frequency, and the n is the unit sum of Discovery frame in time；It is described
Mod is modulo operation symbol；
Wherein, a, c, d, e, g are integer, and a and m are coprime, and c and n are coprime, and d and n are coprime.
3. according to the method described in claim 2, the p divides exactly a-1, the p it is characterized in that, at least there is a prime number p
Divide exactly m, the p does not divide exactly e.
4. the method according to claim 1, wherein according to the first user equipment in a upper Discovery frame
In transmission location, determine transmission location of first user equipment in current Discovery frame, comprising:
According to formula (it,jt)=f (it-1,jt-1)=((ait-1+bjt-1+ e) mod m, (kc it-1+djt-1+ g) mod n), really
Fixed transmission location of first user equipment in current Discovery frame；
Wherein, t is the frame number of current Discovery frame, and t-1 is the frame number of a upper Discovery frame, and the i is less than m's
Nonnegative integer, itIndicate number of the Discovery resource in the frequency cells of current Discovery frame, it-1Indicate described first
For user equipment in the number of the frequency cells of a upper Discovery frame, j is the nonnegative integer less than n, jtDescribed in expression
Number of the Discovery resource in the time quantum of current Discovery frame, jt-1Indicate first user equipment upper one
The number of the time quantum of a Discovery frame；The m and n is positive integer, and the m divides exactly the n；The m
The unit for being Discovery frame in frequency sum, the n are the unit sum of Discovery frame in time；The mod
For modulo operation symbol；
Wherein, the Discovery resource is the set of user equipment unit in the frequency that t Discovery frame uses, and is indicated
For sequence (i0,j0)(i1,j1)(i2,j2)……(it,jt)；
Wherein, a, b, c, d, e, g, k are integer, and a and k are coprime, and d and k are coprime, and c and m are coprime, and ad-kbc and m are coprime, that is, a ×
D-k × b × c and m are coprime.
5. according to the method described in claim 4, the p divides exactly b, and the p is whole it is characterized in that, at least there is a prime number p
Except m, the p divides exactly a-1, and the p does not divide exactly e.
6. the method according to any one of claims 1 to 5, which is characterized in that in first user equipment current
On transmission location in Discovery frame, before transmitting Discovery signal, the method also includes:
First user equipment detects N number of Discovery frame before the current Discovery frame, and determination is worked as described
The corresponding transmission location of first user equipment described in N number of Discovery frame before preceding Discovery frame is not used by,
In, N is nonnegative integer.
7. a kind of device for transmitting Discovery signal characterized by comprising
Determining module, for determining the first user equipment current according to the transmission location in a upper Discovery frame
Transmission location in Discovery frame；Described device is set to inside first user equipment or described device is described the
One user equipment；
Wherein, transmission location of first user equipment in current Discovery frame is according only to first user equipment
Transmission location in a upper Discovery frame determines；Transmission of first user equipment in current Discovery frame
Position and transmission location of first user equipment in a upper Discovery frame be not identical in frequency；If described
Transmission location of first user equipment in a upper Discovery frame and second user equipment are in a upper Discovery frame
In transmission location it is identical in time, then transmission location and institute of first user equipment in current Discovery frame
It is not identical in time to state transmission location of the second user equipment in current Discovery frame；
Transmission module, for the transmission location in first user equipment in current Discovery frame, transmission
Discovery signal.
8. device according to claim 7, which is characterized in that the determining module is specifically used for according to formula (it,jt)
=f (it-1,jt-1)=((ait-1+e)mod m,(cit-1+djt-1+ g) mod n), determine first user equipment current
Transmission location in Discovery frame；
Wherein, t is the frame number of current Discovery frame, and t-1 is the frame number of a upper Discovery frame, and the i is less than m's
Nonnegative integer, itIndicate first user equipment in the number of the frequency cells of current Discovery frame, it-1Described in expression
For first user equipment in the number of the frequency cells of a upper Discovery frame, j is the nonnegative integer less than n, jtDescribed in expression
Number of first user equipment in the time quantum of current Discovery frame, jt-1Indicate first user equipment at upper one
The number of the time quantum of Discovery frame；The m and n is positive integer, and the m is less than or equal to the n；Institute
Stating m is unit sum of the Discovery frame in frequency, and the n is the unit sum of Discovery frame in time；It is described
Mod is modulo operation symbol；
Wherein, a, c, d, e, g are integer, and a and m are coprime, and c and n are coprime, and d and n are coprime.
9. device according to claim 8, which is characterized in that at least there is a prime number p, the p divides exactly a-1, the p
Divide exactly m, the p does not divide exactly e.
10. device according to claim 7, which is characterized in that the determining module is specifically used for according to formula (it,jt)
=f (it-1,jt-1)=((ait-1+bjt-1+ e) mod m, (kc it-1+djt-1+ g) mod n), determine first user equipment
Transmission location in current Discovery frame；
Wherein, t is the frame number of current Discovery frame, and t-1 is the frame number of a upper Discovery frame, and the i is less than m's
Nonnegative integer, itIndicate number of the Discovery resource in the frequency cells of current Discovery frame, it-1Indicate described first
For user equipment in the number of the frequency cells of a upper Discovery frame, j is the nonnegative integer less than n, jtDescribed in expression
Number of the Discovery resource in the time quantum of current Discovery frame, jt-1Indicate first user equipment upper one
The number of the time quantum of a Discovery frame；The m and n is positive integer, and the m divides exactly the n；The m
The unit for being Discovery frame in frequency sum, the n are the unit sum of Discovery frame in time；The mod
For modulo operation symbol；
Wherein, the Discovery resource is the set of user equipment unit in the frequency that t Discovery frame uses, and is indicated
For sequence (i0,j0)(i1,j1)(i2,j2)……(it,jt)；
Wherein, a, b, c, d, e, g, k are integer, and a and k are coprime, and d and k are coprime, and c and m are coprime, and ad-kbc and m are coprime, that is, a ×
D-k × b × c and m are coprime.
11. device according to claim 10, which is characterized in that at least there is a prime number p, the p divides exactly b, the p
Divide exactly m, the p divides exactly a-1, and the p does not divide exactly e.
12. device according to any one of claims 8 to 11, which is characterized in that further include:
Detection module, for the transmission location in first user equipment in current Discovery frame, transmission
Before Discovery signal, N number of Discovery frame before the current Discovery frame is detected, is determined described current
The corresponding transmission location of first user equipment described in N number of Discovery frame before Discovery frame is not used by, wherein
N is nonnegative integer.
13. a kind of first user equipment characterized by comprising
Processor, for determining the first user equipment current according to the transmission location in a upper Discovery frame
Transmission location in Discovery frame；
Wherein, transmission location of first user equipment in current Discovery frame is according only to first user equipment
Transmission location in a upper Discovery frame determines；Transmission of first user equipment in current Discovery frame
Position and transmission location of first user equipment in a upper Discovery frame be not identical in frequency；If described
Transmission location of first user equipment in a upper Discovery frame and second user equipment are in a upper Discovery frame
In transmission location it is identical in time, then transmission location and institute of first user equipment in current Discovery frame
It is not identical in time to state transmission location of the second user equipment in current Discovery frame；
Transceiver, for the transmission location in first user equipment in current Discovery frame, transmission
Discovery signal.
14. user equipment according to claim 13, which is characterized in that the processor is specifically used for according to formula (it,
jt)=f (it-1,jt-1)=((ait-1+e)mod m,(cit-1+djt-1+ g) mod n), determine that first user equipment is being worked as
Transmission location in preceding Discovery frame；
Wherein, t is the frame number of current Discovery frame, and t-1 is the frame number of a upper Discovery frame, and the i is less than m's
Nonnegative integer, itIndicate first user equipment in the number of the frequency cells of current Discovery frame, it-1Described in expression
For first user equipment in the number of the frequency cells of a upper Discovery frame, j is the nonnegative integer less than n, jtDescribed in expression
Number of first user equipment in the time quantum of current Discovery frame, jt-1Indicate first user equipment at upper one
The number of the time quantum of Discovery frame；The m and n is positive integer, and the m is less than or equal to the n；Institute
Stating m is unit sum of the Discovery frame in frequency, and the n is the unit sum of Discovery frame in time；It is described
Mod is modulo operation symbol；
Wherein, a, c, d, e, g are integer, and a and m are coprime, and c and n are coprime, and d and n are coprime.
15. user equipment according to claim 14, which is characterized in that at least there is a prime number p, the p divides exactly a-
1, the p divide exactly m, and the p does not divide exactly e.
16. user equipment according to claim 13, which is characterized in that the processor is specifically used for according to formula (it,
jt)=f (it-1,jt-1)=((ait-1+bjt-1+ e) mod m, (kc it-1+djt-1+ g) mod n), determine that first user sets
The standby transmission location in current Discovery frame；
Wherein, t is the frame number of current Discovery frame, and t-1 is the frame number of a upper Discovery frame, and the i is less than m's
Nonnegative integer, itIndicate number of the Discovery resource in the frequency cells of current Discovery frame, it-1Indicate described first
For user equipment in the number of the frequency cells of a upper Discovery frame, j is the nonnegative integer less than n, jtDescribed in expression
Number of the Discovery resource in the time quantum of current Discovery frame, jt-1Indicate first user equipment upper one
The number of the time quantum of a Discovery frame；The m and n is positive integer, and the m divides exactly the n；The m
The unit for being Discovery frame in frequency sum, the n are the unit sum of Discovery frame in time；The mod
For modulo operation symbol；
Wherein, the Discovery resource is the set of user equipment unit in the frequency that t Discovery frame uses, and is indicated
For sequence (i0,j0)(i1,j1)(i2,j2)……(it,jt)；
Wherein, a, b, c, d, e, g, k are integer, and a and k are coprime, and d and k are coprime, and c and m are coprime, and ad-kbc and m are coprime, that is, a ×
D-k × b × c and m are coprime.
17. user equipment according to claim 16, which is characterized in that at least there is a prime number p, the p divides exactly b,
The p divides exactly m, and the p divides exactly a-1, and the p does not divide exactly e.
18. 3 to 17 described in any item user equipmenies according to claim 1, which is characterized in that the processor is also used to
First user equipment is on the transmission location in current Discovery frame, before transmitting Discovery signal, detects institute
N number of Discovery frame before stating current Discovery frame, determination are N number of before the current Discovery frame
The corresponding transmission location of first user equipment described in Discovery frame is not used by, wherein N is nonnegative integer.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2013/078026 WO2014205689A1 (en) | 2013-06-26 | 2013-06-26 | Method and device for transmitting discovery signal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104488321A CN104488321A (en) | 2015-04-01 |
| CN104488321B true CN104488321B (en) | 2018-12-14 |
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| CN201380035268.2A Active CN104488321B (en) | 2013-06-26 | 2013-06-26 | The method and apparatus for transmitting Discovery signal |
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| CN102547871A (en) * | 2012-02-07 | 2012-07-04 | 华为技术有限公司 | Method and device for consulting resource in D2D (Device To Device) communication |
| CN102918879A (en) * | 2010-05-14 | 2013-02-06 | 皇家飞利浦电子股份有限公司 | Method and device for deterministic directional discovery of wireless devices |
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| GB2497916B (en) * | 2011-11-11 | 2014-06-25 | Broadcom Corp | Methods, apparatus and computer programs for monitoring for discovery signals |
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| CN102918879A (en) * | 2010-05-14 | 2013-02-06 | 皇家飞利浦电子股份有限公司 | Method and device for deterministic directional discovery of wireless devices |
| CN102547871A (en) * | 2012-02-07 | 2012-07-04 | 华为技术有限公司 | Method and device for consulting resource in D2D (Device To Device) communication |
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