CN104812059A - Device-to-device synchronization method suitable for user equipment and user equipment - Google Patents
Device-to-device synchronization method suitable for user equipment and user equipment Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/001—Synchronization between nodes
- H04W56/0015—Synchronization between nodes one node acting as a reference for the others
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
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Abstract
The present disclosure provides a device-to-device (D2D) synchronization method and User Equipment (UE) suitable for the user equipment. In one of the exemplary embodiments, the D2D synchronization method includes: receiving the detected signal from the receiver; obtaining a first signal having first timing information and a second signal having second timing information from the detected signal; determining to forward the first timing information or the second timing information based on an upper power limit constraint of the first signal and the second signal and a power difference between the first signal and the second signal; and deciding whether to transmit third timing information inherent to the UE based on whether the first signal and the second signal are below a power threshold.
Description
Technical field
The disclosure relate to be applicable to subscriber equipment device to device synchronous method and subscriber equipment.
Background technology
Device can refer in wireless communication system for the communication means that subscriber equipment (UE) directly communicates with another UE device (Device to Device, D2D) communication.By convention, when UE transmits the message to another UE, in LTE situation, base station or evolved node B (evolved Node B, eNB) will between two UE relay message.But for D2D communication, because the user message of two UE directly can be delivered to another UE from a UE, so by minimized for the interference of eNB.
But, in order to make D2D device synchronous with network or another reciprocity device, D2D synchronizing information can be delivered to each other UE from network or from reciprocity device.Therefore, synchronisation source (synchronization source, SS) can be utilized to transmit D2D synchronizing signal (D2D synchronization signal, D2DSS) to strengthen Network Synchronization.When network implementation synchronous D2D communication instead of asynchronous D2D communicate (wherein, device will search for another device blindly), all D2D devices can need to be registered to network sequence according to synchronizing signal.
Therefore, the equipment of at least two types can be used as synchronisation source.By convention, eNB by periodically transfer system information (wherein, primary synchronization signals (primary synchronizationsignal is set, PSS) and secondary synchronizing signal (secondary synchronization signal, SSS)) and serve as synchronisation source.When receiving PSS/SSS, its sequential can be aimed at the sequential of eNB by D2D UE.And another reciprocity device also can serve as synchronisation source.In particular, any D2D UE can be used as the D2DSS that synchronisation source transmission can be received by another D2D UE.
In order to design D2D synchronization scenario, needs are considered some problem.First, D2D device can receive some synchronizing signals simultaneously.In that case, D2D device will consider the object that self will be synchronized to.If D2D device selects the device of following mistake, so the sequential of D2D device is by misalignment.And, when receiving two or more different reference sequential when D2D device, then may there is sequential confusion.In that case, D2D device will not know which it should follow with reference to sequential.Secondly, select with reference to after sequential at D2D device, the reference sequential of D2D device possibility selected by unnecessary forwarding.
Under any circumstance, D2D synchronous method can through design to guarantee the reliability of network sequence and potential sequential confusion to be minimized.
Summary of the invention
Therefore, the disclosure be directed to be applicable to subscriber equipment device to device (D2D) synchronous method and subscriber equipment (UE).
In one in an exemplary embodiment, the disclosure is directed to a kind of D2D synchronous method, and it comprises: receive the signal detected from receiver; From described detected signal acquisition, there is the first signal of the first time sequence information and there is the secondary signal of the second time sequence information; Decide to forward described first time sequence information or described second time sequence information based on the power upper limit constraint of described first signal and described secondary signal and the difference power between described first signal and described secondary signal; And whether determine whether transmit the 3rd intrinsic time sequence information of UE lower than power threshold based on all detected signals.
In one in an exemplary embodiment, the disclosure is directed to a kind of subscriber equipment, and it comprises: conveyer, for transmitting wireless signal; Receiver, for receiving wireless signal; And treatment circuit, be couple to described conveyer and described receiver and be configured for use in: receiving the signal detected from described receiver; From described detected signal acquisition, there is the first signal of the first time sequence information and there is the secondary signal of the second time sequence information; Described first time sequence information or described second time sequence information is forwarded based on the power upper limit constraint of described first signal and described secondary signal and the difference power between described first signal and described secondary signal; And transmit described UE intrinsic three time sequence information lower than power threshold by described conveyer in response to all detected signals.
In order to make above-mentioned feature and advantage of the present disclosure understand, hereafter describing in detail and being attended by graphic one exemplary embodiment.Should be understood that above general description and following detailed description are all exemplary, and wish to explain further as the disclosure advocated.
However, it should be understood that this summary of the invention may not contain all aspects of the present disclosure and embodiment, and therefore do not mean by any way for restrictive.And the disclosure will comprise significantly to be improved and amendment to those of ordinary skill in the art.
Accompanying drawing explanation
Comprise accompanying drawing to understand the disclosure further, and accompanying drawing to be incorporated in this specification and to form the part of this specification.Described graphic explanation embodiment of the present disclosure, and together with the description in order to explain principle of the present disclosure.
Fig. 1 illustrates the example wireless communication system having D2D ability.
Fig. 2 illustrates that the potential sequential of synchronous D2D wireless communication system is chaotic.
Fig. 3 A illustrates according to the device proposed of the one in one exemplary embodiment of the present disclosure device synchronous method.
Fig. 3 B to Fig. 3 C provides two different instances illustrating concept disclosed in Fig. 3 A further.
Fig. 4 A to Fig. 4 C illustrates that the device proposed is to first of device synchronous method the exemplary sight.
Fig. 5 illustrates that the device proposed is to second of device synchronous method the exemplary sight.
Fig. 6 illustrates that the device proposed is to the 3rd exemplary sight of device synchronous method.
Fig. 7 illustrates D2D synchronizing signal (D2DSS) the trigger flow figure according to the one in one exemplary embodiment of the present disclosure.
Fig. 8 summarizes the device that proposes to the flow chart of device synchronous method.
According to functional block diagram, Fig. 9 illustrates that device that execution proposes is to the exemplary UE of device synchronous method.
[main element label declaration]
101：eNB
102: base station, small cell
103a～103k：UE
211：eNB
212: the two D2D UE synchronisation sources
213: the D2D UE of sequential confusion
214: the one D2D UE synchronisation sources
311：eNB
312：UE
313：UE
314：UE
322：UE
323：UE
324：UE
331: the first broadcasting areas
332: the second broadcasting areas
401：UE0
402：UE1
411：eNB
412：S0
413：S1
420: imagination mark
430: imagination mark
440: imagination mark
501：UE0
502：UE1
511：eNB
512：S0
513：S1
601：UE0
611：eNB
612：S0
901: treatment circuit
902: D/A (D/A)/mould/number (A/D) transducer
903: conveyer
904: receiver
905: antenna element
S111: control signal
S112: conventional cellular communication
S113: find signal
S114:D2D synchronizing signal
S115:D2D communicates
S201, S203, S301, S302, S303, S304, S305, S306, S701, S702, S703, S704, S801, S802, S803: step
D
th: the second edge power threshold
RSRP
pSS/SSS: the Reference Signal Received Power of primary synchronization signals/secondary synchronizing signal
RSRP
d2DSS: device is to the Reference Signal Received Power of device synchronizing signal
The device of D2DSS0, D2DSS1, D2DSSR:S0, S1, UE0 is to device synchronizing signal
P
eNB, P
s0, P
s1: the power level of the RSRP of the synchronizing signal of eNB, S0, S1
P
edge: the first edge power threshold value
Embodiment
With detailed reference to one exemplary embodiment of the present disclosure, the example is illustrated in the accompanying drawings.Whenever possible, similar elements symbol graphic and describe in be used for representing same or similar part.
In order to implement the wireless communication system that can carry out synchronous D2D communication, synchronous by what need to maintain between the UE in wireless network.Therefore, in order to be provided by wireless network, D2D UE's is synchronous, especially be provided in the coverage of wireless network adjacent edges or outside UE synchronous, the disclosure proposes a kind of device being applicable to subscriber equipment to device (D2D) synchronous method and subscriber equipment (UE), and described method relates to be selected synchronisation source and forwards the reference sequential provided by described synchronisation source.Pass through proposed method and apparatus, timing misalignment and sequential confusion will be minimized, so the reliability of the D2D communication of wireless network will be enhanced.And, the scope of the D2D of scalable radio network communication, and near the border need not worrying the coverage of wireless network or outside the synchronous loss of UE.
Fig. 1 illustrates the example wireless communication system having D2D ability.At least one evolved node B (evolved Node B, eNB) 101 that example wireless communication system 100 will comprise the base station synchronization source of serving as each community (cell) and the group of UE 103a to 103k served by eNB 101.UE 103a to 103k can comprise the D2D UE 103a transmitted as the discovery signal (discovery signal) represented by S113, and also comprises the UE serving as cluster head.Community also can comprise at least one base station, small cell 102.The conventional cellular communication such as represented by S112 is supplied to any UE by eNB 101 by wireless communication system 100, such as UE 103b, and the D2D that wireless communication system 100 also can allow UE103a to 103k to participate in as represented by S115 communicates.Wireless network 100 is by being provided for the synchronous of D2D communication from eNB 101 or from cluster head UE 103i transmission as the control signal represented by S111.Synchronisation source is also served as by the D2D synchronizing signal transmitted as represented by S114 in small cell 102.
When any one in UE 103a to 103k is mobile in the wireless range 150 of eNB 101, UE will be regarded as in network coverage.Otherwise when any one in UE 103a to 103k is mobile outside the wireless range 150 of eNB 101, UE will be regarded as outside network coverage.But when UE is when network coverage is outer, another UE can serve as the repeater for the described UE outside network coverage.For example, UE 103b serves as the repeater of UE 103c by user data is delivered to UE 103c from eNB 101.For the UE outside network coverage, another UE also can serve as the cluster head forwarded for the network sequence information of the described UE outside network coverage.For example, UE 103i can serve as the cluster head of UE 103j and UE 103k.But, if UE receives synchronizing information from multiple synchronisation source simultaneously, so sequential confusion may be there is.
Fig. 2 illustrates the situation of the sequential confusion of synchronous D2D wireless communication system.In fig. 2, D2D UE213 simultaneously can receive network sequence information (network timing information) from the 2nd D2D UE synchronisation source 212 from a D2D UE synchronisation source 214 in step s 201 among step S203.Although a D2D UE synchronisation source 214 can be synchronous with eNB 211, the 2nd D2D UE synchronisation source 212 outside the coverage of eNB 211 can provide the time sequence information different from D2D UE synchronisation source 214, and therefore sequential confusion may occur D2D UE 213.In order to avoid sequential is chaotic, needs are known what synchronisation source is himself sequential be registered to by UE.And, in order to the scope that the D2D of extended wireless network communicates, UE also may need to know when serve as sequential transponder, and described sequential transponder receives time sequence information and is forwarded to by described time sequence information may other device near the border of network coverage or outside the border of network coverage.
Fig. 3 A illustrates the process proposed that sequential is selected and sequential forwards according to the one in one exemplary embodiment of the present disclosure.In step S301, UE will perform the detection of one or more synchronisation sources himself sequential is registered to the one in detected synchronisation source.Specifically, after one or more synchronizing signals being detected from one or more synchronisation sources, what synchronizing signal UE can select himself timing synchronization to based on the module of design.For example, the module of design can be the average power detected in a period of time, himself sequential will be registered to a synchronizing signal in a period of time with most high-average power to make UE.Aforementioned average power in a period of time may refer to the Reference Signal Received Power (reference signalreceived power, RSRP) of (such as) signal.For another example, the module of design also can be the relative distance between synchronisation source and UE.
In step s 302, whether decision is activated sequential forwarding capability by UE.When activating sequential forwarding capability, whether decision is forwarded to another device the time sequence information of selected synchronisation source by UE.The activation of sequential forwarding capability can based on the gap of the upper limit constraint of the module of the design of selected synchronisation source and the module designed between selected synchronisation source and another external synchronization source.When the gap of the module meeting upper limit constraint and design exceedes a certain threshold value, the sequential forwarding capability of UE will be activated.For example, if the module of design is the average power detected in a period of time, so UE can determine whether meet power upper limit constraint, namely, whether the average power detected of the synchronizing signal of selected synchronisation source is less than the first edge power threshold value, and UE also can to determine between selected synchronisation source and another synchronisation source whether detect the difference of average power more than the second edge power threshold.Another synchronisation source described can be the synchronisation source in a period of time with the highest detected average power except described selected synchronisation source.When meet power upper limit constraint and the difference power detected more than the second edge power threshold time, UE can serve as sequential transponder so that time sequence information is forwarded to another external device (ED) from selected synchronisation source.Two edge power threshold values referred to above are positive nonzero number and will likely change in different sight.
In step S303, if the sequential forwarding capability of UE is not activated, so UE by only with selected synchronisation source timing synchronization.But if the sequential forwarding capability of UE is activated, so process moves to step S304.In step s 304, UE will determine that the time sequence information of selected synchronisation source is forwarded actual further, or, the independent synchronization source that UE will serve as other device.In general, if UE is not synchronized to any detected synchronisation source, such as, all detected signal powers lower than power threshold, so UE independent synchronization source of will serve as other device.In step S305, suppose that UE cannot by ordered pair is accurate to any detected synchronisation source at that time, so UE will serve as independent synchronization source.In step S306, suppose that sequence at that time can be registered to selected synchronisation source by UE, so UE is forwarded to other device by selected time sequence information.Fig. 3 B and Fig. 3 C is provided for two different instances of the concept illustrating Fig. 3 A further.
In figure 3b, suppose eNB 311 by the system information broadcast comprising PSS and SSS to the UE 312 of edge of transmission scope being positioned at eNB311, so UE 312 serves as synchronisation source by the UE (such as, UE 314) be forwarded to by the time sequence information be embedded in PSS and SSS outside the coverage of eNB 311.But for the UE 312 of the edge of the transmission scope at eNB 311, PSS and SSS received from eNB311 will be reliable.If PSS and SSS is unreliable, so will UE (such as, UE 313) be considered as outside the coverage of eNB 311.UE 313 will serve as independent synchronization source by intrinsic D2DSS is sent to the UE in the coverage of UE 313 subsequently.
Fig. 3 C is another example of illustrating Fig. 3 B in more detail further.In the example of Fig. 3 C, eNB311 is by the system information signal of broadcast packet containing PSS and SSS.In first broadcasting area 331 of eNB 311, the RSRP of system information signal will, more than the first edge power threshold value, namely be that power upper limit constraint is not met.The time sequence information provided by eNB 311 (such as, PSS/SSS) can not be relayed to other UE by any UE in the first broadcasting area 331.But, if UE is outside the first broadcasting area 331, the boundary of broadcasting area that so described UE will be regarded as at eNB 311, and the time sequence information of eNB 311 can be relayed to other UE.Because UE 322 is just outside the first broadcasting area 331, UE 322 will be relayed to UE 323 time sequence information.If UE is outside the first broadcasting area 331 but in the second broadcasting area 332, so described UE will be regarded as having received time sequence information fully reliably, time sequence information can be relayed to other UE to make described UE.Region between the first broadcasting area 331 and the second broadcasting area 332 can be defined as lower area: the RSRP of the system information signal received by UE is lower than the first edge power threshold value, but the RSRP of the system information signal received by same UE is higher than the 3rd edge power threshold value, wherein the first edge power threshold value is greater than the 3rd edge power threshold value, and two edge power threshold values are all positive nonzero number.If UE is in outside the second broadcasting area 332, so described UE does not have time sequence information fully reliably, sequential definite message or answer breath will be forwarded to other UE to make described UE.For example, when the UE 323 in Fig. 3 C is in the second broadcasting area 332 and when time sequence information being supplied to UE324 by transmitting the D2DSS that is registered to network, time sequence information lower than the 3rd edge power threshold value, may be forwarded to other UE to make UE 324 by the D2DSS received by UE 324.Fig. 4 to Fig. 7 provides the further details of proposed D2D synchronous method by exploring various exemplary sight.
Fig. 4 A to Fig. 4 C illustrates that the device proposed is to first of device synchronous method the exemplary sight.Fig. 4 A illustrates the signaling diagram of various D2D wireless network element.In Figure 4 A, broadcast is had the PSS/SSS of a power level by eNB 411, and described power level is expressed as P
eNB.Except receiving P
eNBoutside, UE0401 also can receive D2DSS0, and it represents the D2DSS from S0412 and has power level P
s0.S0412 can represent another synchronisation source of the different time sequence informations had from eNB 411, and can be another D2D device outside the scope of eNB 411.UE0401 also can receive D2DSS1, and its representative has power level P from S1413
s1d2DSS.S1413 also can represent another synchronisation source of the different time sequence informations had from eNB411 and S0412, and can be another D2D device outside the scope of eNB 411 and S0412.The D2DSS (D2DSSR) produced by UE0401 will be sent to UE1402.For the first exemplary sight, network time sequence information PSS/SSS is derived D2DSSR.
Fig. 4 B is with the exemplary sight of further specification specified first.For the first exemplary sight, suppose for UE0, P
eNB>P
s0>P
s1, that is, suppose that UE0401 and S0412 compares and compare closer to UE0401 (not shown) closer to eNB411, S0412 and S1413.If the P of UE0 impression
eNBbe greater than and be designated as P
th1the first power threshold, so UE0401 will be chosen as eNB 411 synchronisation source of ordered pair standard at that time.If the P of UE0401 impression
eNBbe greater than the first edge power threshold value P
edge, so UE0401 can be considered as in the radius of eNB 411 to imagination mark 420, and time sequence information can not be forwarded to other UE by UE 401.But, if the P of UE0401 impression
eNBbe less than the first edge power threshold value, so time sequence information is forwarded to UE1402 based on the condition explained in lower part by UE0401.If UE0401 detects condition (P
eNB– P
s0) >d
th, so UE0401 will be forwarded to UE1402 D2DSSR, and D2DSSR can separately based on the time sequence information from eNB 411, or from the combination time sequence information of the eNB 411 and D2DSS0 from S0, wherein d
thbe designated as the second edge power threshold.D
thbe the accurate threshold value in predetermined power position, and represent sequential forwarding capability activation threshold.Number d can be adjusted by network reliability requirement
th.In other words, if network has higher reliability requirement, so d
thto be larger.Satisfy condition P
eNB<P
edge(P
eNB– P
s0) >d
thmean that UE0401 marks 420 and the imaginary annular section marked between 430 by being positioned at by the imagination of Fig. 4 B, to use the time sequence information from eNB 411 to forward D2DSSR.If (P
eNB– P
s0) <=d
th, so UE0401 does not forward the time sequence information from eNB 411, this is because described time sequence information can be regarded as unreliable.
The cross-sectional view of Fig. 4 C key diagram 4B.In the figure of top, imagination mark 440 is P
eNB=P
s0part.Along with UE0401 is moved into closer to eNB 411, P
eNBp will be greater than
s0.In intermediate pattern, the distance between eNB 411 and mark 430 is at P
eNB> (P
s0+ d
th) radius in.This means that decay is reached d by the power level of PSS/SSS when UE0401 moves to imagination mark 440 from imagination mark 430
th.In the bottom figure of Fig. 4 C, imagination mark 420 and the imagination distance marked between 430 are meeting P
edge>P
eNB> (P
s0+ d
th) annular section in.This means if UE0401 mark in the radius of 430 but outside eNB 411 with the imaginary radius marking 420, so the time sequence information of eNB 411 can be forwarded to UE1402 with D2DSSR by UE0401 in eNB 411 and imagination.
Fig. 5 illustrates that device is to second of device synchronous method the exemplary sight.For the second exemplary sight, UE0501 compares near eNB 511 closer to S0512.Therefore, if UE0501 detects P
eNB>=P
th1, so UE0501 will select the sequential from eNB 511, this is because, although UE0501 compares close eNB 511 have higher priority closer to S0512, eNB 511 by being regarded as, wherein P
th1it is the first power threshold.UE0501 will make its sequential synchronous with the PSS/SSS from eNB 511 subsequently, but time sequence information can not be forwarded to other UE by UE 501.But, if UE0501 detects P
eNB<P
th1and P
s0>=P
th2, so UE0501 is by synchronous with the time sequence information from S0512, wherein P
th2be designated as the second power threshold.This means UE0501 may from eNB 511 too away from and/or do not receive sufficient power from eNB 511, but UE0501 will receive abundant power from S0512, to make UE0501 can be synchronous with S0512.
For the perimeter being positioned at the coverage of S0512 as UE0, or in other words, the P detected by UE0501
s0be less than predetermined first edge power threshold value P
edgetime situation, if so UE0501 detects (P
s0– P
eNB) >d
thso UE0 is by by transmitting the sequential with D2DSS0 or having the combination sequential of D2DSS0 and eNB or have the D2DSSR of combination sequential of all D2DSS that UE0501 has received, and start the time sequence information from S0512 to be forwarded to may near the coverage of eNB 511 and S0512 or outside other UE.Sequential can be adjusted based on the reliability requirement of whole D2D communication system and forward activation threshold, that is, the second edge power threshold d
th.
Fig. 6 illustrates the three exemplary sight of device to device synchronous method.For this exemplary sight, when UE0601 detects respectively from the P that eNB 611, S0612 and S1 (not shown) receive
eNB, P
s0and P
s1time all lower than predetermined power threshold, i.e. P
eNB<P
th1and (P
s0, P
s1) <P
th2, so UE0601 is regarded as outside the coverage of eNB network and S0612, wherein P
th1be the first power threshold and P
th2it is the second power threshold.In the case, UE0601 is not by synchronous with the time sequence information from any one in aforementioned synchronization source.But UE0601 is by other reciprocity device of being sent to by D2DSSR based on its intrinsic time sequence information in the scope of UE0601 or D2D UE.
Fig. 7 illustrates D2D synchronizing signal (D2DSS) the trigger flow figure that can relate to aforementioned sight.Suppose that UE receives PSS/SSS from base station, and receive at least one D2DSS from external synchronization source.In step s 701, at least one system information that the UE supposing to have D2D ability has transmitted from base station detects PSS/SSS, and UE at least one system information that also motor synchronizing source has been transmitted with D2D ability detects the strongest D2DSS.In step S702, UE will determine its RSRP (RSRP PSS/SSS whether being detected
pSS/SSS) lower than predetermined PSS/SSS threshold value (threshold value
pSS/SSS), wherein threshold value
pSS/SSSwith P
th1define identical.If the RSRP of PSS/SSS is higher than predetermined PSS/SSS threshold value, the first exemplary sight so mentioned above will be suitable for.If the RSRP of PSS/SSS, lower than predetermined PSS/SSS threshold value, so will perform step S703.In step S703, UE will determine the RSRP (RSRP of the D2DSS received
d2DSS) whether lower than predetermined D2DSS threshold value (threshold value
d2DSS), wherein threshold value
d2DSSwith P
th2define identical.If the RSRP of the D2DSS received is higher than predetermined D2DSS threshold value, the second exemplary sight so mentioned above will be suitable for.If the RSRP of the D2DSS received, lower than predetermined D2DSS threshold value, so will perform step S704, and the 3rd exemplary sight mentioned above will be suitable for.In step S704, UE transmits D2DSS by based on the intrinsic time sequence information of this UE.
Fig. 8 summarizes the flow chart of proposed device to device synchronous method from the angle of the UE with D2D ability.In step S801, UE receives detected signal by from receiver, and UE will have the first signal of the first time sequence information and have the secondary signal of the second time sequence information from detected signal acquisition.In step S802, UE determines to forward described first time sequence information or described second time sequence information by based on the power upper limit constraint of described first signal and described secondary signal and the difference power between described first signal and described secondary signal.In step S803, whether UE determines whether transmit the 3rd intrinsic time sequence information of UE lower than power threshold by based on all detected signals.
In one in an exemplary embodiment, first time sequence information can comprise primary synchronization signals (PSS) and secondary synchronizing signal (SSS), if and the first signal is higher than the first power threshold, then UE can be synchronized to the first time sequence information of the first signal, if and the first signal is lower than the first power threshold, then asynchronous the first time sequence information to the first signal.
In one in an exemplary embodiment, if secondary signal higher than the second power threshold and the first signal lower than the first power threshold, then UE can be synchronized to secondary signal.
In one in an exemplary embodiment, UE can only when the first signal lower than the first power threshold and secondary signal lower than the second power threshold, just transmit the 3rd time sequence information.
In one in an exemplary embodiment, if the first signal is lower than the first edge power threshold value, then UE can forward the first time sequence information, and if the first signal higher than the first edge power threshold value, then UE does not forward the first time sequence information.
In one in an exemplary embodiment, if secondary signal is lower than the first edge power threshold value, then UE can forward the second time sequence information, and if secondary signal higher than the first edge power threshold value, then UE does not forward the second time sequence information.
In one in an exemplary embodiment, if the first signal has the power of second edge power threshold higher than secondary signal, then UE can forward the first time sequence information, and if the first signal does not have the power of second edge power threshold higher than secondary signal, then UE does not forward the first time sequence information.
In one in an exemplary embodiment, if secondary signal has exceed power in the second edge power threshold than the first signal, then UE can forward the second time sequence information, if and secondary signal does not have and exceeds power in the second edge power threshold than the first signal, then UE does not forward the second time sequence information.
In one in an exemplary embodiment, the first and second edge power threshold values mentioned above are adjustable.
Fig. 9 expresses plasticity UE according to functional block diagram.The UE of Fig. 9 will correspond to the UE of Fig. 8, can perform the device that proposes to device synchronous method according to functional block diagram.UE contains at least (but being not limited to) is couple to the treatment circuit 901 of D/A (D/A)/mould/number (A/D) transducer 902, conveyer 903, receiver 904 and one or more antenna elements 905.Wirelessly transmission signal incited somebody to action by conveyer 903, and wirelessly Received signal strength incited somebody to action by receiver 904.Conveyer 903 and receiver 904 also can perform the operations such as such as low noise amplification, impedance matching, mixing, up-conversion or down-conversion, filtering, amplification.(D/A)/(A/D) be configured to be transformed into from the analog signal format from receiver 904 can by the digital signals format for the treatment of circuit 901 digital processing for transducer 902.On the other hand, (D/A)/(A/D) transducer 902 can be transformed into analog signal format to be sent to conveyer 903 from treatment circuit 901 Received signal strength and by the signal of digital signals format.Treatment circuit 901 is configured to processing digital signal and performs the program according to the D2D synchronous method proposed of foregoing example embodiment of the present disclosure.And, treatment circuit 901 can optionally be couple to non-transitory medium with store programming code, device configuration, code book, through buffering or permanent data etc.The function for the treatment of circuit 901 is implemented by using the programmable units such as such as microprocessor, microcontroller, dsp chip, FPGA.The function for the treatment of circuit 901 also can be implemented with independent electronic or IC, and the function performed by treatment circuit may be implemented in the net territory of hardware or software.
In the disclosure, the keyword of 3GPP class or term are only used as example to present according to inventive concept of the present disclosure; Such as, but the same concept presented in the disclosure can be applied to other system any by those skilled in the art, IEEE 802.11, IEEE 802.16, WiMAX etc.
In the disclosure, term " subscriber equipment " (UE) can represent various embodiment, its (such as) can including (but not limited to) mobile radio station, advanced mobile radio station (advanced mobile station, AMS), server, client, desktop PC, laptop computer, network computer, work station, personal digital assistant (personal digital assistant, PDA), tablet personal computer (personalcomputer, PC), scanner, telephone device, beep-pager, camera, TV, handheld video gaming device, music apparatus, wireless senser etc.In some applications, UE can be the stationary computer device operated in the mobile environment such as such as bus, train, aircraft, ship, automobile.
Should not be construed as concerning the disclosure for the element in the detailed description of the disclosed embodiment of subject application, action or instruction is absolute key or necessary, unless so described clearly.And as used herein, word " " can comprise one to begin a project.If intend to refer to an only project, term " single " or similar language so will be used.In addition, as used herein, term before the list of multiple project and/or multiple project kind " in any one " wishes to comprise described project and/or project kind individually or in conjunction with other project and/or other project kind " in any one ", " in any combination ", " in any multiple " and/or " in multiple any combinations ".In addition, as used herein, term " set " wishes to comprise any quantity project, comprises zero.In addition, as used herein, term " quantity " wishes to comprise any quantity, comprises zero.
Being appreciated by those skilled in the art that, when not departing from the scope of the present disclosure or spirit, various modifications and variations can being carried out to the structure of the disclosed embodiments.In view of above content, wish that the disclosure contains modifications and variations of the present disclosure, as long as described modifications and variations fall in the scope of appended claims and its equivalent.
Claims (20)
1. the device being applicable to subscriber equipment, to a device synchronous method, is characterized in that, described method comprises:
The signal detected is received from receiver;
From described detected signal acquisition, there is the first signal of the first time sequence information and there is the secondary signal of the second time sequence information;
Decide to forward described first time sequence information or described second time sequence information based on the power upper limit constraint of described first signal and described secondary signal and the difference power between described first signal and described secondary signal; And
Whether determine whether transmit the 3rd intrinsic time sequence information of described subscriber equipment lower than power threshold based on described first signal and described secondary signal.
2. method according to claim 1, wherein said first time sequence information comprises primary synchronization signals and secondary synchronizing signal, it is characterized in that, also comprises:
If described first signal is higher than the first power threshold, be then synchronized to described first time sequence information of described first signal; And
If described first signal is lower than described first power threshold, then asynchronous described first time sequence information to described first signal.
3. method according to claim 1, is characterized in that, also comprises:
If described secondary signal higher than the second power threshold and described first signal lower than described first power threshold, be then synchronized to described secondary signal.
4. method according to claim 1, is characterized in that, also comprises:
Only when described first signal lower than described first power threshold and described secondary signal lower than described second power threshold, just transmit described 3rd time sequence information.
5. method according to claim 2, is characterized in that, also comprises:
If described first signal is lower than the first edge power threshold value, then forward described first time sequence information; And
If described first signal higher than described first edge power threshold value, does not then forward described first time sequence information.
6. method according to claim 3, is characterized in that, also comprises:
In secondary signal lower than described first edge power threshold value, then forward described second time sequence information; And
In described secondary signal higher than described first edge power threshold value, then do not forward described second time sequence information.
7. method according to claim 5, is characterized in that, also comprises:
If described first signal has exceed power in the second edge power threshold than described secondary signal, then forward described first time sequence information; And
If described first signal does not have exceed power in described second edge power threshold than described secondary signal, then do not forward described first time sequence information.
8. method according to claim 6, is characterized in that, also comprises:
If described secondary signal has exceed power in described second edge power threshold than described first signal, then forward described second time sequence information; And
If described secondary signal does not have exceed power in described second edge power threshold than described first signal, then do not forward described second time sequence information.
9. method according to claim 7, is characterized in that, wherein said first edge power threshold value and described second edge power threshold are adjustable.
10. method according to claim 1, is characterized in that, wherein said second time sequence information comprises first device to device synchronizing signal, and described 3rd time sequence information comprises the second device to device synchronizing signal.
11. 1 kinds of subscriber equipmenies, is characterized in that, comprising:
Conveyer, for transmitting wireless signal;
Receiver, for receiving wireless signal; And
Treatment circuit, is couple at least one conveyer and at least one receiver and is configured for use in:
The signal detected is received from described receiver;
From described detected signal acquisition, there is the first signal of the first time sequence information and there is the secondary signal of the second time sequence information;
Described first time sequence information or described second time sequence information is forwarded based on the power upper limit constraint of described first signal and described secondary signal and the difference power between described first signal and described secondary signal; And
The 3rd intrinsic time sequence information of described subscriber equipment is transmitted lower than power threshold by described conveyer in response to all detected signals.
12. subscriber equipmenies according to claim 11, wherein said first signal comprises primary synchronization signals and secondary synchronizing signal, it is characterized in that, described treatment circuit through be configured to further for:
If described first signal is higher than the first power threshold, be then synchronized to described first time sequence information of described first signal; And
If described first signal is lower than described first power threshold, then asynchronous described first time sequence information to described first signal.
13. subscriber equipmenies according to claim 11, is characterized in that, wherein said treatment circuit through be configured to further for:
If described secondary signal higher than the second power threshold and described first signal lower than described first power threshold, be then synchronized to described secondary signal.
14. subscriber equipmenies according to claim 11, is characterized in that, wherein said treatment circuit through be configured to further for:
Only when described first signal lower than described first power threshold and described secondary signal lower than described second power threshold, just transmit described 3rd time sequence information.
15. subscriber equipmenies according to claim 12, is characterized in that, wherein said treatment circuit through be configured to further for:
If described first signal is lower than the first edge power threshold value, then forward described first time sequence information via described conveyer and described receiver; And
If described first signal is higher than described first edge power threshold value, then do not forward described first time sequence information via described conveyer and described receiver.
16. subscriber equipmenies according to claim 13, is characterized in that, wherein said treatment circuit through be configured to further for:
If described secondary signal is lower than described first edge power threshold value, then forward described second time sequence information via described conveyer and described receiver; And
If described secondary signal is higher than described first edge power threshold value, then do not forward described second time sequence information via described conveyer and described receiver.
17. subscriber equipmenies according to claim 15, is characterized in that, wherein said treatment circuit through be configured to further for:
If described first signal has exceed power in the second edge power threshold than described secondary signal, then forward described first time sequence information via described conveyer and described receiver; And
If described first signal does not have exceed power in described second edge power threshold than described secondary signal, then do not forward described first time sequence information via described conveyer and described receiver.
18. subscriber equipmenies according to claim 16, is characterized in that, wherein said treatment circuit through be configured to further for:
If described secondary signal has exceed power in described second edge power threshold than described first signal, then forward described second time sequence information via described conveyer and described receiver; And
If described secondary signal does not have exceed power in described second edge power threshold than described first signal, then do not forward described second time sequence information via described conveyer and described receiver.
19. subscriber equipmenies according to claim 17, is characterized in that, wherein said first edge power threshold value and described second edge power threshold are adjustable.
20. subscriber equipmenies according to claim 11, is characterized in that, wherein said second time sequence information comprises first device to device synchronizing signal, and described 3rd time sequence information comprises the second device to device synchronizing signal.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
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| US201461932263P | 2014-01-28 | 2014-01-28 | |
| US61/932,263 | 2014-01-28 | ||
| US14/572,783 US9167544B2 (en) | 2014-01-28 | 2014-12-17 | Device to device synchronization method applicable to user equipment and user equipment using the same |
| US14/572,783 | 2014-12-17 | ||
| TW104100255A TWI539852B (en) | 2014-01-28 | 2015-01-06 | Device to device synchronization method applicable to user equipment and user equipment using the same |
| TW104100255 | 2015-01-06 |
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| CN104812059A true CN104812059A (en) | 2015-07-29 |
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