CN104488321A - Method and device for transmitting discovery signal - Google Patents

Method and device for transmitting discovery signal Download PDF

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Publication number
CN104488321A
CN104488321A CN201380035268.2A CN201380035268A CN104488321A CN 104488321 A CN104488321 A CN 104488321A CN 201380035268 A CN201380035268 A CN 201380035268A CN 104488321 A CN104488321 A CN 104488321A
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discovery
user equipment
frames
current
discovery frames
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CN104488321B (en
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张祺智
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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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
    • 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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  • Engineering & Computer Science (AREA)
  • Databases & Information Systems (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Provided are a method and device for transmitting a discovery signal. The method comprises: according to a transmission position of a first user equipment in a previous discovery frame, determining a transmission position of the first UE in a current discovery frame, wherein the transmission position of the first user equipment in the current discovery frame is different from that of the first user equipment in the previous discovery frame in frequency; and if the transmission position of the first user equipment in the previous discovery frame is the same as that of a second user equipment in the previous discovery frame in time, then the transmission position of the first user equipment in the current discovery frame is different from that of the second user equipment in the current discovery frame in time; and transmitting a discovery signal on the transmission position of the first user equipment in the current discovery frame. The embodiments of the present invention alleviate the burden of the UE to transmit a discovery signal, thereby reducing the production cost of the UE.

Description

Method and device for transmitting discovery signal
The method and apparatus for transmitting Discovery signals
Technical field
The present invention relates to the communication technology, more particularly to a kind of method and apparatus of transmission Discovery signals.Background technology
Device-to-device（Device to Device, abbreviation D2D) communicating refers to user equipment（User Equipment, abbreviation UE) between directly communicated, it is not necessary to forwarded by base station.In order to realize mutual direct communication between UE, it is necessary to first mutually find.Each UE needs to send Discovery signals 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 frames composition on the time.Each Discovery frames are divided into m frequency cells from frequency, and m is positive integer, and i is the numbering of frequency cells, and i is the nonnegative integer less than m；Each Discovery frames are divided into n time quantum from the time, and n is positive integer, and j is the numbering of time quantum, and j is the nonnegative integer less than n.The unit when friendship of i-th frequency cells and j-th of time quantum is called (i, j) individual frequency.Unit when 1 frequency is used only in each UE in a Discovery frame.In view of the numerous of UE numbers, it is generally the case that m is not more than n.If some UE units in the frequency that t-th of Discovery frame is used are (it, jt).Claim sequence (i., j.） (ii, ji) (i2, j2) ... ... (it, jt) and for Discovery resource, claim the
Unit is Discovery resources position in the frequency of t frames during (it, jt) individual frequency.
Under normal circumstances, it is necessary to be redirected when entering line frequency to each UE Discovery signals sent, i.e. the Discovery resources that the UE is used every frame in frequency/when position it is different so that each UE is had the opportunity to by other all UE discoveries.
Prior art provides a kind of technical scheme, determine UE in the transmission location of current Discovery frame ins, position when UE needs to know the frame number of current Discovery frames and/or the UE initial frequency, according to the initial transmission position of the frame number of current Discovery frames and/or the UE, transmission locations of the UE in present frame is determined.Accordingly, it would be desirable to design special method make UE obtain current Discovery frames frame number and/or the Discovery resources initial frequency when position.Thus, the complexity of system is added, UE transmission is added and intercepts the burden of Discovery signals. The content of the invention
The embodiment of the present invention provides a kind of method and apparatus of transmission Discovery signals, in the case where redirecting the transmission location of Discovery signals, reducing the complexity of system.In a first aspect, the embodiment of the present invention provides a kind of method of transmission Discovery signals, including：According to transmission location of first user equipment in a upper Discovery frame, transmission locations of the first UE in current Discovery frames is determined；
Wherein, transmission location of first user equipment in current Discovery frames is determined according only to transmission location of first user equipment in a upper Discovery frame；Transmission location of first user equipment in current Discovery frames is with first user equipment at upper one
Transmission location in Discovery frames is differed in frequency；If transmission location of transmission location of first user equipment in a upper Discovery frame with second user equipment in a upper Discovery frame is identical in time, transmission location of transmission location of first user equipment in current Discovery frames with the second user equipment in current Discovery frames is differed in time；
In first user equipment on the transmission location in current Discovery frames, Discovery signals are transmitted.
With reference in a first aspect, in the first possible implementation, according to transmission location of first user equipment in a upper Discovery frame, determine transmission location of first user equipment in current Discovery frames, including：
According to formula (it, jt)=f (i t-i, j t-i)=((ait-i+e) mod m, (cit-i+dj t- i+g) mod n), determine transmission location of first user equipment in current Discovery frames；
Wherein, t is the frame number of current Discovery frames, and t-1 is the frame number of a upper Discovery frame, and the i is the nonnegative integer less than m, itNumbering of first user equipment in the frequency cells of current Discovery frames is represented, the numbering of frequency cells of first user equipment in a upper Discovery frame is represented, j is the nonnegative integer less than n, jtNumbering of first user equipment in the time quantum of current Discovery frames is represented, the numbering of time quantum of first user equipment in a upper Discovery frame is represented；The m and the n are positive integers, and the m is less than or equal to the n;The m is unit sum of the Discovery frames in frequency, and the n is the unit sum of Discovery frames 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 in a first aspect, in second of possible implementation, according to transmission location of first user equipment in a upper Discovery frame, determine transmission location of first user equipment in current Discovery frames, including：
It is rich blunt according to formula (it, jt)= f(i t-i, j t-i)= ( ( a it-i+b j t-i+e ) mod m, (kc it-i+d j t- i+g) mod n), determine Discovery resources position in the frequency of current Discovery frames；
Wherein, t is the frame number of current Discovery frames, and t-1 is the frame number of a upper Discovery frame, and the i is the nonnegative integer less than m, itNumbering of the Discovery resources in the frequency cells of current Discovery frames is represented, the numbering of frequency cells of first user equipment in a upper Discovery frame is represented, j is the nonnegative integer less than n, jtNumbering of the Discovery resources in the time quantum of current Discovery frames is represented, the numbering of time quantum of first user equipment in a upper Discovery frame is represented；The m and the n are positive integers, and the m divides exactly the n;The m is unit sum of the Discovery frames in frequency, and the n is the unit sum of Discovery frames 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, gp, and a X d-k X b X c and m is coprime.
With reference to first aspect, or the first possible implementation of first aspect and second of possible implementation, in the third possible implementation, in first user equipment on the transmission location in current Discovery frames, transmit before Discovery signals, methods described also includes：
First user equipment detects N number of Discovery frames before the current Discovery frames, it is determined that the corresponding transmission location of the first user equipment is not used by described in N number of Discovery frames before the current Discovery frames, wherein, N is nonnegative integer.Second aspect, the embodiment of the present invention provides a kind of device of transmission Discovery signals, including：Determining module, for the transmission location in a upper Discovery frame, determines transmission location of first user equipment in current Discovery frames；Described device is arranged inside first user equipment or described device is first user equipment；
Wherein, transmission location of first user equipment in current Discovery frames is determined according only to transmission location of first user equipment in a upper Discovery frame；Transmission location of transmission location of first user equipment in current Discovery frames with first user equipment in a upper Discovery frame is differed in frequency；If first user equipment is upper Transmission location of the transmission location with second user equipment in a upper Discovery frame in one Discovery frame is identical in time, then transmission location of transmission location of first user equipment in current Discovery frames with the second user equipment in current Discovery frames is differed in time；
Transport module, for the transmission location in first user equipment in current Discovery frames, transmits Discovery signals.
With reference to second aspect, in the first possible implementation, the determining module, specifically for according to formula (it, jt)=f(i ", j t—i)= ( ( ait_ i+e) mod m, (ci "+dj "+g) mod n), determine transmission location of first user equipment in current Discovery frames；
Wherein, t is the frame number of current Discovery frames, and t-1 is the frame number of a upper Discovery frame, and the i is the nonnegative integer less than m, itNumbering of first user equipment in the frequency cells of current Discovery frames is represented, the numbering of frequency cells of first user equipment in a upper Discovery frame is represented, j is the nonnegative integer less than n, jtNumbering of first user equipment in the time quantum of current Discovery frames is represented, represents first user equipment at upper one
The numbering of the time quantum of Discovery frames；The m and the n are positive integers, and the m is less than or equal to the n;The m is unit sum of the Discovery frames in frequency, and the n is the unit sum of Discovery frames 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 second aspect, in second of possible implementation, the determining module, specifically for according to formula (it, jt)= f(i t_!, j t-1)= ( ( a it_!+b j t_!+e ) mod m, (kc it_!+d j t-1+ g) mod n), determine Discovery resources position in the frequency of current Discovery frames；
Wherein, t is the frame number of current Discovery frames, and t-1 is the frame number of a upper Discovery frame, and the i is the nonnegative integer less than m, itNumbering of the Discovery resources in the frequency cells of current Discovery frames is represented, the numbering of frequency cells of first user equipment in a upper Discovery frame is represented, j is the nonnegative integer less than n, jtNumbering of the Discovery resources in the time quantum of current Discovery frames is represented, the numbering of time quantum of first user equipment in a upper Discovery frame is represented；The m and the n are positive integers, and the m divides exactly the n;The m is unit sum of the Discovery frames in frequency, and the n is the unit sum of Discovery frames 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, Ad-kbc and m are coprime, gp, and a X d-k X b X c and m is coprime.
With reference to second aspect, second aspect the first or can implementation and second may implementation, in the third possible implementation, detection module, for the transmission location in first user equipment in current Discovery frames, before transmission Discovery signals, detect N number of Discovery frames before the current Discovery frames, it is determined that the corresponding transmission location of the first user equipment is not used by described in N number of Discovery frames before the current Discovery frames, wherein, N is nonnegative integer.
The third aspect, the embodiment of the present invention also provides a kind of first user equipment, including：
Processor, for the transmission location in a upper Discovery frame, determines transmission location of first user equipment in current Discovery frames；
Wherein, transmission location of first user equipment in current Discovery frames is determined according only to transmission location of first user equipment in a upper Discovery frame；Transmission location of transmission location of first user equipment in current Discovery frames with first user equipment in a upper Discovery frame is differed in frequency；If transmission location of transmission location of first user equipment in a upper Discovery frame with second user equipment in a upper Discovery frame is identical in time, transmission location of transmission location of first user equipment in current Discovery frames with the second user equipment in current Discovery frames is differed in time；
Transceiver, for the transmission location in first user equipment in current Discovery frames, transmits Discovery signals.
With reference to the third aspect, in the first possible implementation, the processor, specifically for according to formula (it, jt)=f (i t-i, j t-i)=((ait-i+e) mod m, (ci "+dj "+g) mod n), determines transmission location of first user equipment in current Discovery frames；
Wherein, t is the frame number of current Discovery frames, and t-1 is the frame number of a upper Discovery frame, and the i is the nonnegative integer less than m, itNumbering of first user equipment in the frequency cells of current Discovery frames is represented, the numbering of frequency cells of first user equipment in a upper Discovery frame is represented, j is the nonnegative integer less than n, jtNumbering of first user equipment in the time quantum of current Discovery frames is represented, the numbering of time quantum of first user equipment in a upper Discovery frame is represented；The m and the n are positive integers, and the m is less than or equal to the n;The m is unit sum of the Discovery frames in frequency, the n For the unit sum of Discovery frames 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 the third aspect, in second of possible implementation, the processor, specifically for according to formula (it, jt)= f(i t-i, j t-i)= ( ( it-i+b j t-i+e ) mod m, (kc it-i+d j t- i+g) mod n), determine Discovery resources position in the frequency of current Discovery frames；
Wherein, t is the frame number of current Discovery frames, and t-1 is the frame number of a upper Discovery frame, and the i is the nonnegative integer less than m, itNumbering of the Discovery resources in the frequency cells of current Discovery frames is represented, the numbering of frequency cells of first user equipment in a upper Discovery frame is represented, j is the nonnegative integer less than n, jtNumbering of the Discovery resources in the time quantum of current Discovery frames is represented, the numbering of time quantum of first user equipment in a upper Discovery frame is represented；The m and the n are positive integers, and the m divides exactly the n;The m is unit sum of the Discovery frames in frequency, and the n is the unit sum of Discovery frames 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, gp, and a X d-k X b X c and m is coprime.
With reference to the third aspect, the first of the third aspect and second or can implementation in, the processor, it is additionally operable in first user equipment on transmission location in current Discovery frames, before transmission Discovery signals, detect N number of Discovery frames before the current Discovery frames, it is determined that the corresponding transmission location of the first user equipment is not used by described in N number of Discovery frames before the current Discovery frames, wherein, N is nonnegative integer.
In above-mentioned technical proposal, first UE positions in the frequency of current Discovery frames are determined according to the first UE in the transmission location of a upper Discovery frame, it is unrelated with the frame number of current Discovery frames and the initial transmission position of Discovery resources, first UE need to only know transmission locations of the first UE in a upper Discovery frame, the frame number of current Discovery frames and the first UE initial transmission position need not be obtained, it just can determine that transmission locations of the first UE in present frame, therefore, reduce the complexity of system, alleviate the first UE transmission and intercept the burden of Discovery signals.Due in each Discovery frames, if the first UE is identical in time in the transmission location of a upper Discovery frame with the 2nd UE in the transmission location of a upper Discovery frame, then the first UE is differed in time in the transmission location of current Discovery frames with the 2nd UE in the transmission location of current Discovery frames, and transmission locations and first UE of the first UE in current Discovery frames exist Transmission location in a upper Discovery frame is differed in frequency so that the Discovery signals that each UE is sent can be found by other UE.Brief description of the drawings
Fig. 1 is a kind of method flow diagram of transmission Discovery signals provided in an embodiment of the present invention；Fig. 2A is the method flow diagram of another transmission Discovery signals provided in an embodiment of the present invention；
Fig. 2 B are a kind of Discovery frames pattern schematic diagram of the method generation provided according to Fig. 2A；Fig. 3 A are the method flow diagram of another transmission Discovery signal provided in an embodiment of the present invention；
Fig. 3 B are a kind of Discovery frames pattern schematic diagram of the method generation provided according to Fig. 3 A；Fig. 4 A are a kind of apparatus structure schematic diagram of transmission Discovery signals provided in an embodiment of the present invention；
Fig. 4 B are the apparatus structure schematic diagram of another transmission Discovery signals 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.Embodiment
Fig. 1 provides a kind of method flow diagram of transmission Discovery signals for the embodiment of the present invention.The executive agent of the present embodiment can be that the UE of transmission Discovery signals can also be received
The UE of Discovery signals.As shown in figure 1, the method that the present embodiment is provided includes：
Step 11:First UE, in the transmission location of a upper Discovery frame, determines transmission locations of the first UE in current Discovery frames according to the first UE；Wherein, the first UE meets following condition a and 1) in the transmission location of current Discovery frames.Wherein, the transmission location can be position when the first UE transmits the frequency of Discovery signals.
If the first UE is the UE for sending Discovery signals, when a upper Discovery frame finds that some transmission location is idle, Discovery signals can be sent on the transmission location of current Discovery frames, now, some free transfer position of a upper Discovery frame is referred to as transmission locations of the first UE in a upper Discovery frame.First UE is sent on current Discovery frames before Discovery signals, technical scheme provided in an embodiment of the present invention can be used, according to the One UE determines transmission locations of the first UE in current Discovery frames in the transmission location of a upper Discovery frame.In addition, first UE is after a upper Discovery frame finds that some transmission location is idle, can also continue to whether the first UE of detection is idle in the transmission location of current Discovery frames and next Discovery frames, the first UE of detection is in current Discovery frames and next
When whether the transmission location of Discovery frames is idle, first UE can also use technical scheme provided in an embodiment of the present invention, according to the first UE in the transmission location of a upper Discovery frame, transmission locations of the first UE in current Discovery frames is determined.The first UE is being detected after the transmission location of at least one Discovery frame is idle, the first UE can send Discovery signals.
If the first UE is the UE for intercepting Discovery signals, the Discovery signals of the 2nd UE transmissions are listened in some transmission of a upper Discovery frame, in order to continue to intercept Discovery signals on the transmission location of current Discovery frames, first UE can also use technical scheme provided in an embodiment of the present invention, according to the first UE in the transmission location of a upper Discovery frame, transmission locations of the UE in current Discovery frames is determined.Now, first UE listens to the transmission location of the Discovery signals of the 2nd UE transmissions in the transmission location of a upper Discovery frame for the first UE on a upper Discovery frame, and the first UE listens the transmission location of the Discovery signals of other UE transmissions in the transmission location of current Discovery frames for the first UE in current Discovery frames celestial being.In the embodiment of the present invention, the first UE is satisfied by condition A and B in position in the frequency of each Discovery frames.Condition A is that transmission locations of the first UE in current Discovery frames is determined according only to transmission locations of the first UE in a upper Discovery frame.If condition B is transmission locations of the first UE in a upper Discovery frame, the transmission location with the 2nd UE in a upper Discovery frame is identical in time, and transmission location of transmission locations of the first UE in current Discovery frames with the 2nd UE in current Discovery frames is differed in time.That is, if two UE transmit Discovery signals on the time identical transmission location of a upper Discovery frame, then on current Discovery frames, the two UE transmit Discovery signals on different transmission location of different time.
To make the first UE meet above-mentioned condition in position in the frequency of each Discovery frames, the function f mapped one by one can be designed.First UE U (i ", j "), (it-1, jt-1)) or (it, jt)=f (i ", j ") f4(i ", j ")) calculate oneself position in the frequency of each Discovery frames.
Preferably, function f is expressed as： Z/mZ x Z/nZ→ Z/tnZ x Z/; Wherein, it is components of the f in frequency, is the components of f in time.M is unit sum of the Discovery frames in frequency, and n is the unit sum of Discovery frames in time,
Z/mZ=f0,1 in- represent that the numbering of the frequency cells of Discovery frames is all, Z/llZ=0,, the numbering of the time quantum of-expression Discovery frames is all.The direct product of set is represented for the symbol of operation of direct product. ZlnZ, iG ZIr.I represents the numbering of frequency cells of the UE in Discovery frames, and j represents the numbering of time quantums of the UE in Discovery frames.
F, if foot：If i ≠, then f2(i, j)≠ f2(, for all
js Z/nZ, i Zlr,( Zlr.Equivalent to, if transmission location of transmission locations of the first UE in a upper Discovery frame with the 2nd UE in a upper Discovery frame is identical in time, transmission location transmission locations with twoth UE in current Discovery frame of the first UE in current Discovery frames is differed in time.
The implication to function f expression formula is illustrated below：
If the 8th, B is two nonempty sets, if there is a rule f so as to each element a in A, corresponded to therewith by rule f, the element f (a) that existence anduniquess is determined in B, then f is called the mapping from A to B, is denoted as：
For example：
f φ. ΐ) ^ (Ό,Ι)
H- a
Represent that mapping f reflects each element in open interval (0,1) square for oneself.
Step 12:First UE on position, transmits Discovery signals in frequencies of the first UE in current Discovery frames.Wherein, transmission Discovery signals include sending Discovery signals standing grain mouthful/or receive Discovery signals.
If the first UE is the UE for sending Discovery signals, determine that the first UE behind position, in the first UE on the transmission location of current Discovery frames, sends Discovery signals in the frequency of current Discovery frames.If the first UE is the UE for receiving Discovery signals, when it is determined that the first UE is in the frequency of current Discovery frames behind position, in frequencies of the first UE in current Discovery frames on position, Discovery signals are received.
Preferably, the first UE also meets following condition c in the transmission location of current Discovery frames:Transmission locations and first UE of first UE in current Discovery frames are at upper one Transmission location in Discovery frames is differed in frequency, it is possible to achieve frequency diversity gain.For example, UE0 to UE3 channel is very serious in frequency cells i=0 decline, and UE0 can also send Discovery signals in other frequency cells, and UE3 can have found the Discovery signals that UE0 is sent in other frequency cells.To meet frequency diversity low gain, above-mentioned function f is met： f\(i, j)≠i, for all i,.
Alternatively, in the first UE on the transmission location in current Discovery frames, before transmission Discovery signals, detect N number of Discovery frames before the current Discovery frames, it is determined that the corresponding transmission locations of the first UE are not used by described in N number of Discovery frames before the current Discovery frames, wherein, N is nonnegative integer.
In above-mentioned technical proposal, the first UE in the frequency of current Discovery frames position according to first
UE is determined in the transmission location of a upper Discovery frame, it is unrelated with the frame number of current Discovery frames and the initial transmission position of Discovery resources, first UE need to only know transmission locations of the first UE in a upper Discovery frame, the frame number of current Discovery frames and the first UE initial transmission position need not be obtained, it just can determine that transmission locations of the first UE in present frame, therefore, the complexity of system is reduced, the first UE transmission is alleviated and intercepts the burden of Discovery signals.Due in each Discovery frames, if the first UE is identical in time in the transmission location of a upper Discovery frame with the 2nd UE in the transmission location of a upper Discovery frame, then the first UE is differed in time in the transmission location of current Discovery frames with the 2nd UE in the transmission location of current Discovery frames, and transmission location of transmission locations of the first UE in current Discovery frames with the first UE in a upper Discovery frame is differed in frequency, so that the Discovery signals that each UE is sent can be found by other UE.
Fig. 2A is the method flow diagram of another transmission Discovery signals provided in an embodiment of the present invention.The executive agent of the present embodiment can be that the UE of transmission Discovery signals can also be the UE for receiving Discovery signals.As shown in Figure 2 A, the method that the present embodiment is provided includes：
Step 21:UE is according to formula (it, jt f i t—h j "):((ai "+e) mod m, (ci ^+dj t-i+g) mod n), determine the UE current Discovery (it was found that）The position during frequency of frame.
Wherein, t is the frame number of current Discovery frames, and t-1 is the frame number of a upper Discovery frame, and the i is the nonnegative integer less than m, itNumberings of the UE in the frequency cells of current Discovery frames is represented, j is the nonnegative integer less than n, jtRepresent numberings of the UE in the time quantum of current Discovery frames；The m and the n are positive integers, and the m is less than or equal to the n;It is described M is unit sum of the Discovery frames in frequency, and n is the unit sum of Discovery frames in time.Mod is modulo operation.
Wherein,（It-hjt-L^ UE positions in the frequency of a upper Discovery frame,（it,jt) it is UE positions in the frequency of current Discovery frames.
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 be mapping function, f meet ifi ≠, then f2(i,j)≠ f2(i , for all js Z/nZ, ie ZlrJe Zlr.Preferably, to realize frequency diversity gain, at least in the presence of a prime number p, the p divides exactly a-l, and the p divides exactly m, and the p does not divide exactly e so that f is met： fl(i, j)≠ i, for all i,.
For example, if m=n=3, a=c=d=e=l is made, g=0, then (it, jt)=f(it j t-1)=( (i"+l ) mod 3, (it-1+jt-1)mod3).With numeral 0,1, position is as shown in Figure 2 B in the frequency of Discovery frames t=0,1,2,3 for 89 UE represented Discovery resources.As shown in Figure 2 B, each Discovery frames have 3 frequency cells in frequency, also have each big square frame in 3 time quantums, Fig. 2 B to represent a Discovery frame in time, wherein the time is classified as, behavior frequency.
In Fig. 2 B the 0th Discovery frame is represented from the first big square frame of left side number, in Fig. 2 B the 1st Discovery frame is represented from the second big square frame of left side number, represent in the 2nd Discovery frame, Fig. 2 B from the 3rd big square frame of left side number to represent the 3rd Discovery frame from the 4th big square frame of left side number in Fig. 2 B.
Referring to from the first big square frame of left side number, UE0 position is in the frequency of the 0th Discovery frame in Fig. 2 B（0,0), UE1 position is in the frequency of the 0th Discovery frame（0,1) ..., UE8 position is in the frequency of the 0th Discovery frame（2,2).Referring to the big square frame of second left in Fig. 2 B, UE0 position is in the frequency of the 1st Discovery frame（1,0), UE1 position is in the frequency of the 1st Discovery frame（1,1) ..., UE8 position is in the frequency of the 1st Discovery frame（0,1).From 2B it can also be seen that different UE are different from the frequency of each Discovery frames on position.
As shown in Figure 2 B, UE0, UE3 and UE6 the 0th Discovery frame time location on time quantum 0, but on the 1st Discovery frame, UE0 time location is on time quantum 0, UE3 time location is on time quantum 1, and UE6 time location is on time quantum 2.Therefore, two or more UE send Discovery signals on the same time position of a upper Discovery frame, then on current Discovery frames, on different time locations Send Discovery signals.
As shown in Figure 2 B, UE0 in the frequency domain position of the 0th Discovery frame in frequency cells 0, and the 1st Discovery frame frequency domain position in frequency cells 1.Therefore, the first UE positions in the frequency of current Discovery frames, are differed position with the 2nd UE in the frequency of a upper Discovery frame in frequency, so as to realize frequency diversity gain.
Step 22：UE on position, transmits Discovery signals in frequencies of the UE in current Discovery frames.
In the present embodiment, according to formula (it,jt)=f(it-1, jt-1)=((ai^+e) modm, (ci^+dj t-i+g) modn), determine UE positions in the frequency of each Discovery frames, position when UE need not obtain the initial frequency of the frame number and the UE of current Discovery frames, therefore, the burden of UE transmission Discovery signals and UE production cost are alleviated.
Fig. 3 A are the method flow diagram of another transmission Discovery signals provided in an embodiment of the present invention.The executive agent of the present embodiment can be that the UE of transmission Discovery signals can also be the UE for receiving Discovery signals.As shown in Figure 3A, the method that the present embodiment is provided includes：
Step 31:UE is according to formula (it,jt)=f(it— Shang, Shang)=((ai "+bjt-1+e) modm,
(kci"+djt-1+ g) modn), determine the UE current Discovery (it was found that) frequency of frame when position.
Wherein, t is the frame number of current Discovery frames, and t-1 is the frame number of a upper Discovery frame, and the i is the nonnegative integer less than m, itNumberings of the UE in the frequency cells of current Discovery frames is represented, j is the nonnegative integer less than n, jtRepresent numberings of the UE in the time quantum of current Discovery frames；The m and the n are positive integers, and the m divides exactly the n, m=nk;The m is unit sum of the Discovery frames in frequency, and n is the unit sum of Discovery frames in time.Mod is modulo operation symbol.
Wherein,（It-hjt-L^ UE positions in the frequency of a upper Discovery frame,（it,jt) it is UE positions in the frequency of current Discovery frames；
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, gp, and aXd-kXbXc and m are coprime.
Function f be mapping function, f meet ifi ≠, then f2(i,j)≠ f2(i, for all jGZ/nZ, i Zlr,ie Zlr.Preferably, to realize frequency diversity gain, at least in the presence of a prime number p, the p divides exactly b, and the p divides exactly m, and the p divides exactly a-l, and the p is not Divide exactly e so that f is met： fl(j, j)≠i, for all ,.
For example, if m=n=4, k=l, a=3, b=2, c=- l, d=e=g=l, (i are madet, jt)= f(i j t_i)= ( ( 3 it-i+2 j t_ i+l) mod 4, (it-i+ j t-i+1 ) mod 4 ) 。
With hexadecimal digit 0,1 ..., 16 UE that f is represented Discovery resources Discovery frames t=0,1,2,3,4 position as shown in Figure 3 B.As shown in Figure 3 B, each Discovery frames have 4 frequency cells in frequency, also have each big square frame in 4 time quantums, Fig. 3 B to represent a Discovery frame in time, wherein the time is classified as, behavior frequency.
As can be seen from Figure 3B, different UE resources are different from the frequency of each Discovery frames on position.Two UE send Discovery signals on the same time position of a upper Discovery frame, then on current Discovery frames, and Discovery signals are sent on different time locations.Different UE are different from the frequency of each Discovery frames on position.
Step 32：UE on position, transmits Discovery signals in frequencies of the UE in current Discovery frames.
In the present embodiment, according to formula 2: (itJt)=f (i t-i, j t-i)=((a i^+b j ^+e) mod m, (kc i "+d j "+g) mod n), determine UE positions in the frequency of each Discovery frames, UE need not obtain current Discovery frames frame number and UE initial frequency when position, therefore, alleviate UE transmission Discovery signals burden and UE production cost.
Fig. 4 A are a kind of apparatus structure schematic diagram of transmission Discovery signals provided in an embodiment of the present invention.The device can be used for realizing the above method, therefore, and the feature in above method embodiment may apply in the present embodiment.The device can be the first UE.As shown in Figure 4 A, the device that the present embodiment is provided includes：Determining module 41 and transport module 42.
Determining module 41, for the transmission location in a upper Discovery frame, determines transmission locations of the first UE in current Discovery frames；Described device is arranged inside the first UE or described device is the first UE.
Wherein, transmission locations of the first UE in current Discovery frames is determined according only to transmission locations of the first UE in a upper Discovery frame；If transmission location of transmission locations of the first UE in a upper Discovery frame with the 2nd UE in a upper Discovery frame is identical in time, transmission location transmission locations with twoth UE in current Discovery frame of the first UE in current Discovery frames is differed in time.Preferably, to realize frequency diversity gain, transmission locations of the first UE in current Discovery frames with Transmission locations of first UE in a upper Discovery frame is differed in frequency.
Transport module 42, for the transmission location in the first UE in current Discovery frames, transmits Discovery signals.
Alternatively, as shown in Figure 4 B, the device that Fig. 4 A are provided may also include：Detection module 43.Detection module, for the transmission location in the first UE in current Discovery frames, before transmission Discovery signals, detect N number of Discovery frames before the current Discovery frames, it is determined that the corresponding transmission locations of the first UE are not used by described in N number of Discovery frames before the current Discovery frames, wherein, N is nonnegative integer.
The present embodiment can be found in described in Fig. 1 correspondence embodiments, will not be repeated here.
Alternatively, also there are following examples：
The determining module, specifically for formula ( ( ait_1+E) mod m, (ci M+dj M+g) mod n), determine transmission locations of the first UE in current Discovery frames；
Wherein, t is the frame number of current Discovery frames, and t-1 is the frame number of a upper Discovery frame, and the i is the nonnegative integer less than m, itThe numbering of frequency cells of the first UE in current Discovery frames is represented, the numbering of frequency cells of the first UE in a upper Discovery frame is represented, j is the nonnegative integer less than n, jtThe numbering of time quantums of the first UE in current Discovery frames is represented, the numbering of time quantums of the first UE in a upper Discovery frame is represented；The m and the n are positive integers, and the m is less than or equal to the n;The m is unit sum of the Discovery frames in frequency, and the n is the unit sum of Discovery frames 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 in the presence of a prime number p, the p divides exactly a-l, and the p divides exactly m, and the p does not divide exactly e, so as to meet condition：First UE positions in the frequency of current Discovery frames, differ position in frequency in the frequency of a upper Discovery frame with the 2nd UE, realize frequency diversity gain.
The present embodiment can be found in described in Fig. 2 correspondence embodiments, will not be repeated here.
Alternatively, embodiment also may be present：
The determining module, specifically for according to formula（it, jt)= f(i ( a it— 1+b j t— 1+e ) mod m, (kc it_i+d j t_ i+g) mod n), determine the Discovery resources current The position during frequency of Discovery frames.
Wherein, t is the frame number of current Discovery frames, and t-1 is the frame number of a upper Discovery frame, and the i is the nonnegative integer less than m, itNumbering of the Discovery resources in the frequency cells of current Discovery frames is represented, the numbering of frequency cells of the first UE in a upper Discovery frame is represented, j is the nonnegative integer less than n, jtNumbering of the Discovery resources in the time quantum of current Discovery frames is represented, the numbering of time quantums of the first UE in a upper Discovery frame is represented；The m and the n are positive integers, and the m divides exactly the n;The m is unit sum of the Discovery frames in frequency, and the n is the unit sum of Discovery frames 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 standing grain mouthful m is coprime.
Preferably, at least in the presence of 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 does not divide exactly e, so that position meets following condition during the first UE frequency：First UE positions in the frequency of current Discovery frames, differ position in frequency in the frequency of a upper Discovery frame with the 2nd UE, realize frequency diversity gain.
The present embodiment can be found in described in Fig. 3 A correspondence embodiments, will not be repeated here.In above-mentioned technical proposal, first UE positions in the frequency of current Discovery frames are determined according to the first UE in the transmission location of a upper Discovery frame, initial transmission position with the frame number standing grain Jie Discovery resources of current Discovery frames is unrelated, first UE need to only know transmission locations of the first UE in a upper Discovery frame, the frame number of current Discovery frames and the first UE initial transmission position need not be obtained, it just can determine that transmission locations of the first UE in present frame, therefore, reduce the complexity of system, alleviate the first UE transmission and intercept the burden of Discovery signals.Because in each Discovery frames, if the first UE is identical in time in the transmission location of a upper Discovery frame with the 2nd UE in the transmission location of a upper Discovery frame, the first UE is current
The transmission location of Discovery frames is differed in time with the 2nd UE in the transmission location of current Discovery frames, and transmission location of transmission locations of the first UE in current Discovery frames with the first UE in a upper Discovery frame is differed in frequency so that the Discovery signals that each UE is sent can be found by other UE.
Fig. 5 is a kind of first UE structural representations provided in an embodiment of the present invention.The user equipment can be used for realizing the above method, therefore, and the feature in above method embodiment may apply to this implementation In example.As shown in figure 5, the first UE includes：Processor 51 and transceiver 52.
Processor 51, for the transmission location in a upper Discovery frame, determines transmission locations of the first UE in current Discovery frames；
Wherein, transmission locations of the first UE in current Discovery frames is determined according only to transmission locations of the first UE in a upper Discovery frame；Transmission location transmission locations with first UE in a upper Discovery frame of first UE in current Discovery frames is differed in frequency；If transmission location of transmission locations of the first UE in a upper Discovery frame with the 2nd UE in a upper Discovery frame is identical in time, transmission locations of the first UE in current Discovery frames is with the 2nd UE current
Transmission location in Discovery frames is differed in time；
Transceiver 52, for the transmission location in the first UE in current Discovery frames, transmits Discovery signals.
Alternatively, the processor, it is additionally operable in the first UE on transmission location in current Discovery frames, before transmission Discovery signals, detect N number of Discovery frames before the current Discovery frames, it is determined that the corresponding transmission locations of the first UE are not used by described in N number of Discovery frames before the current Discovery frames, wherein, N is nonnegative integer.
Processor and the concrete function of transceiver can be found in described in the corresponding embodiments of Fig. 1 in the present embodiment, will not be repeated here.
Alternatively, also there are following examples：
The processor, specifically for according to formula (it, ( ( ait_1+e ) mod m,
(ci M+dj M+g) mod n), determine transmission locations of the first UE in current Discovery frames；
Wherein, t is the frame number of current Discovery frames, and t-1 is the frame number of a upper Discovery frame, and the i is the nonnegative integer less than m, itThe numbering of frequency cells of the first UE in current Discovery frames is represented, the numbering of frequency cells of the first UE in a upper Discovery frame is represented, j is the nonnegative integer less than n, jtThe numbering of time quantums of the first UE in current Discovery frames is represented, the numbering of time quantums of the first UE in a upper Discovery frame is represented；The m and the n are positive integers, and the m is less than or equal to the n;The m is unit sum of the Discovery frames in frequency, and the n is the unit sum of Discovery frames 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 in the presence of a prime number p, the p divides exactly a-l, and the p divides exactly m, and the p does not divide exactly e.
Described in example, it will not be repeated here.
The processor, specifically for according to formula (it, jt)= f(i t-i, j t-i)= ( ( a it_1+b j t_1+e ) mod m, (kc it_i+d j t- i+g) mod n), determine Discovery resources position in the frequency of current Discovery frames；
Wherein, t is the frame number of current Discovery frames, and t-1 is the frame number of a upper Discovery frame, and the i is the nonnegative integer less than m, itNumbering of the Discovery resources in the frequency cells of current Discovery frames is represented, the numbering of frequency cells of the first UE in a upper Discovery frame is represented, j is the nonnegative integer less than n, jtNumbering of the Discovery resources in the time quantum of current Discovery frames is represented, the numbering of time quantums of the first UE in a upper Discovery frame is represented；The m and the n are positive integers, and the m divides exactly the n;The m is unit sum of the Discovery frames in frequency, and the n is the unit sum of Discovery frames 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 in the presence of 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 does not divide exactly e.
The present embodiment can be found in described in Fig. 3 A correspondence embodiments, will not be repeated here.
In above-mentioned technical proposal, first UE positions in the frequency of current Discovery frames are determined according to the first UE in the transmission location of a upper Discovery frame, it is unrelated with the frame number of current Discovery frames and the initial transmission position of Discovery resources, first UE need to only know transmission locations of the first UE in a upper Discovery frame, the frame number of current Discovery frames and the first UE initial transmission position need not be obtained, it just can determine that transmission locations of the first UE in present frame, therefore, reduce the complexity of system, alleviate the first UE transmission and intercept the burden of Discovery signals.Due in each Discovery frames, if the first UE is identical in time in the transmission location of a upper Discovery frame with the 2nd UE in the transmission location of a upper Discovery frame, then the first UE is differed in time in the transmission location of current Discovery frames with the 2nd UE in the transmission location of current Discovery frames, and transmission locations and first UE of the first UE in current Discovery frames exist Transmission location in a upper Discovery frame is differed in frequency so that the Discovery signals that each UE is sent can be found by other UE.
One of ordinary skill in the art will appreciate that：Realizing all or part of step of above-mentioned each method embodiment can be completed by the related hardware of programmed instruction.Foregoing program can be stored in a computer read/write memory medium.The program upon execution, performs the step of including above-mentioned each method embodiment；And foregoing storage medium includes：ROM, RAM, magnetic disc or CD etc. are various can be with the medium of store program codes.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；Although the present invention is described in detail with reference to foregoing embodiments, it will be understood by those within the art that：It can still modify to the technical scheme described in foregoing embodiments, or carry out equivalent substitution to which part or all technical characteristic；And these modifications or replacement, the essence of appropriate technical solution is departed from the scope of various embodiments of the present invention technical scheme.

Claims (9)

  1. Claims
    1st, it is a kind of to transmit the method for finding Discovery signals, it is characterised in that including：According to transmission location of first user equipment in a upper Discovery frame, transmission locations of the first UE in current Discovery frames is determined；
    Wherein, transmission location of first user equipment in current Discovery frames is determined according only to transmission location of first user equipment in a upper Discovery frame；Transmission location of first user equipment in current Discovery frames is with first user equipment at upper one
    Transmission location in Discovery frames is differed in frequency；If transmission location of transmission location of first user equipment in a upper Discovery frame with second user equipment in a upper Discovery frame is identical in time, transmission location of transmission location of first user equipment in current Discovery frames with the second user equipment in current Discovery frames is differed in time；
    In first user equipment on the transmission location in current Discovery frames, transmission
    Discovery signals.
    2nd, according to the method described in claim 1, it is characterised in that according to transmission location of first user equipment in a upper Discovery frame, determine first user equipment current
    Transmission location in Discovery frames, including：
    According to formula (it, jt)=f (i ", j t-i)=((ait-i+e) mod m, (cit-i+dj t- i+g) mod n), determine transmission location of first user equipment in current Discovery frames；
    Wherein, t is the frame number of current Discovery frames, and t- 1 is the frame number of a upper Discovery frame, and the i is the nonnegative integer less than m, itNumbering of first user equipment in the frequency cells of current Discovery frames is represented, the numbering of frequency cells of first user equipment in a upper Discovery frame is represented, j is the nonnegative integer less than n, jtNumbering of first user equipment in the time quantum of current Discovery frames is represented, represents first user equipment at upper one
    The numbering of the time quantum of Discovery frames；The m and the n are positive integers, and the m is less than or equal to the n;The m is unit sum of the Discovery frames in frequency, and the n is the unit sum of Discovery frames 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.
    3rd, method according to claim 2, it is characterised in that at least in the presence of a prime number p, the p divides exactly a- l, and the p divides exactly m, and the p does not divide exactly e. 4th, according to the method described in claim 1, it is characterised in that according to transmission location of first user equipment in a upper Discovery frame, determine first user equipment current
    Transmission location in Discovery frames, including：
    According to formula (it, jt)=f (i "; j ")=((a it-i+b j t-i+e) mod m, (kc i "+d j "+g) mod n), determine Discovery resources position in the frequency of current Discovery frames；
    Wherein, t is the frame number of current Discovery frames, and t-1 is the frame number of a upper Discovery frame, and the i is the nonnegative integer less than m, itNumbering of the Discovery resources in the frequency cells of current Discovery frames is represented, the numbering of frequency cells of first user equipment in a upper Discovery frame is represented, j is the nonnegative integer less than n, jtNumbering of the Discovery resources in the time quantum of current Discovery frames is represented, the numbering of time quantum of first user equipment in a upper Discovery frame is represented；The m and the n are positive integers, and the m divides exactly the n;The m is unit sum of the Discovery frames in frequency, and the n is the unit sum of Discovery frames 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, gp, and a X d-k X b X c and m is coprime.
    5th, method according to claim 4, it is characterised in that at least in the presence of 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 does not divide exactly e.
    6th, before method according to any one of claim 1 to 5, it is characterised in that in first user equipment on transmission location in current Discovery frames, transmission Discovery signals, methods described also includes：
    First user equipment detects N number of Discovery frames before the current Discovery frames, it is determined that the corresponding transmission location of the first user equipment is not used by described in N number of Discovery frames before the current Discovery frames, wherein, N is nonnegative integer.
    7th, a kind of device of transmission Discovery signals, it is characterised in that including：
    Determining module, for the transmission location in a upper Discovery frame, determines transmission location of first user equipment in current Discovery frames；Described device is arranged inside first user equipment or described device is first user equipment；
    Wherein, transmission location of first user equipment in current Discovery frames is determined according only to transmission location of first user equipment in a upper Discovery frame；Transmission location of first user equipment in current Discovery frames is with first user equipment at upper one Transmission location in Discovery frames is differed in frequency；If transmission location of transmission location of first user equipment in a upper Discovery frame with second user equipment in a upper Discovery frame is identical in time, transmission location of transmission location of first user equipment in current Discovery frames with the second user equipment in current Discovery frames is differed in time；
    Transport module, for the transmission location in first user equipment in current Discovery frames, transmits Discovery signals.
    8th, device according to claim 7, it is characterised in that the determining module, specifically for according to formula (it, jt)=f(i ", j ")= ( ( ait-i+e ) mod m, ( ci t-i+dj t- i+g) mod n), determine transmission location of first user equipment in current Discovery frames；
    Wherein, t is the frame number of current Discovery frames, and t-1 is the frame number of a upper Discovery frame, and the i is the nonnegative integer less than m, itNumbering of first user equipment in the frequency cells of current Discovery frames is represented, the numbering of frequency cells of first user equipment in a upper Discovery frame is represented, j is the nonnegative integer less than n, jtNumbering of first user equipment in the time quantum of current Discovery frames is represented, represents first user equipment at upper one
    The numbering of the time quantum of Discovery frames；The m and the n are positive integers, and the m is less than or equal to the n;The m is unit sum of the Discovery frames in frequency, and the n is the unit sum of Discovery frames 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.9th, device according to claim 8, it is characterised in that at least in the presence of a prime number p, the p divides exactly a-l, and the p divides exactly m, and the p does not divide exactly e.
    10th, device according to claim 7, it is characterised in that the determining module, it is blunt according to formula specifically for Bian（it, jt)= f(i t-i, j t-i)= ( ( a it_i+b j t_ i+e) mod m, (kc it_i+d j t_ i+g) mod n), determine Discovery resources position in the frequency of current Discovery frames；
    Wherein, t is the frame number of current Discovery frames, and t-1 is the frame number of a upper Discovery frame, and the i is the nonnegative integer less than m, itNumbering of the Discovery resources in the frequency cells of current Discovery frames is represented, the numbering of frequency cells of first user equipment in a upper Discovery frame is represented, j is the nonnegative integer less than n, jtNumbering of the Discovery resources in the time quantum of current Discovery frames is represented, the numbering of time quantum of first user equipment in a upper Discovery frame is represented；The m and the n are positive integers, and described M divides exactly the n;The m is unit sum of the Discovery frames in frequency, and the n is the unit sum of Discovery frames 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, gp, and a X d-k X b X c and m is coprime.
    11st, device according to claim 10, it is characterised in that at least in the presence of 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 does not divide exactly e.
    12nd, the device according to any one of claim 8 to 11, it is characterised in that also include:Detection module, for the transmission location in first user equipment in current Discovery frames, before transmission Discovery signals, detect N number of Discovery frames before the current Discovery frames, it is determined that the corresponding transmission location of the first user equipment is not used by described in N number of Discovery frames before the current Discovery frames, wherein, N is nonnegative integer.
    13rd, a kind of first user equipment, it is characterised in that including：
    Processor, for the transmission location in a upper Discovery frame, determines transmission location of first user equipment in current Discovery frames；
    Wherein, transmission location of first user equipment in current Discovery frames is determined according only to transmission location of first user equipment in a upper Discovery frame；Transmission location of first user equipment in current Discovery frames is with first user equipment at upper one
    Transmission location in Discovery frames is differed in frequency；If transmission location of transmission location of first user equipment in a upper Discovery frame with second user equipment in a upper Discovery frame is identical in time, transmission location of transmission location of first user equipment in current Discovery frames with the second user equipment in current Discovery frames is differed in time；
    Transceiver, for the transmission location in first user equipment in current Discovery frames, transmits Discovery signals.
    14th, user equipment according to claim 13, it is characterised in that the processor, specifically for according to formula（it, jt)=f(i ", j ")= ( ( ait_!+ e) mod m, (ci M+dj ^+g) mod n), determine transmission location of first user equipment in current Discovery frames；
    Wherein, t is the frame number of current Discovery frames, and t-1 is the frame number of a upper Discovery frame, and the i is the nonnegative integer less than m, itNumbering of first user equipment in the frequency cells of current Discovery frames is represented, represents first user equipment in a upper Discovery frame The numbering of frequency cells, j is the nonnegative integer less than n, jtNumbering of first user equipment in the time quantum of current Discovery frames is represented, represents first user equipment at upper one
    The numbering of the time quantum of Discovery frames；The m and the n are positive integers, and the m is less than or equal to the n;The m is unit sum of the Discovery frames in frequency, and the n is the unit sum of Discovery frames 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.
    15th, user equipment according to claim 14, it is characterised in that at least in the presence of a prime number p, the p divides exactly a-1, and the p divides exactly m, and the p does not divide exactly e.
    16th, user equipment according to claim 13, it is characterised in that the processor, it is blunt according to formula (i specifically for Biant, jt)= f(i t-i, j t-i)= ( ( a it_i+b j t_i+e ) mod m, (kc it_ i+d j t-i+g) mod n), determine that Discovery resources position in the frequency of current Discovery frames is straight；
    Wherein, t is the frame number of current Discovery frames, and t-1 is the frame number of a upper Discovery frame, and the i is the nonnegative integer less than m, itNumbering of the Discovery resources in the frequency cells of current Discovery frames is represented, the numbering of frequency cells of first user equipment in a upper Discovery frame is represented, j is the nonnegative integer less than n, jtNumbering of the Discovery resources in the time quantum of current Discovery frames is represented, the numbering of time quantum of first user equipment in a upper Discovery frame is represented；The m and the n are positive integers, and the m divides exactly the n;The m is unit sum of the Discovery frames in frequency, and the n is the unit sum of Discovery frames 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, gp, and aX d-k X b X c and m is coprime.
    17th, user equipment according to claim 16, it is characterised in that at least in the presence of 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 does not divide exactly e.
    18th, the user equipment according to any one of claim 13 to 17, it is characterized in that, the processor, it is additionally operable in first user equipment on transmission location in current Discovery frames, before transmission Discovery signals, detect N number of Discovery frames before the current Discovery frames, it is determined that the corresponding transmission location of the first user equipment is not used by described in N number of Discovery frames before the current Discovery frames, wherein, N is nonnegative integer.
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