CN110169151A

CN110169151A - A kind of method and apparatus of time of measuring difference

Info

Publication number: CN110169151A
Application number: CN201780083211.8A
Authority: CN
Inventors: 胡军
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2017-04-14
Filing date: 2017-04-14
Publication date: 2019-08-23
Also published as: WO2018188080A1

Abstract

The method and apparatus that the application discloses a kind of time of measuring difference, it is related to the communications field, the accuracy to solve the problems, such as identified timing offset is lower, and/or, during the transmission time difference for determining different base station, because rely on GPS technology caused by smaller scope of application the problem of.This method comprises: first base station obtains Tr1, Tr2 and TdifUE；At the time of Tr1 is that the first base station that first base station measurement obtains receives the first reference signal that UE is sent, at the time of Tr2 is that the second base station that the second base station measurement obtains receives the first reference signal, TdifUE is difference at the time of receiving the third reference signal that the second base station is sent at the time of the UE that UE measurement obtains receives the second reference signal that first base station is sent with UE.According to Tr1, Tr2 and TdifUE, at least one of timing offset Tdif and signal transmission time difference △ T of first base station and the second base station is determined.

Description

A kind of method and apparatus of time of measuring difference

Technical field

This application involves the communications field more particularly to a kind of method and apparatus of time of measuring difference.

Background technique

Base station synchronization technology is the timing offset (timing offset) by obtaining different base station, the timer clock of different base station is adjusted, to realize the technology of the time synchronization between different base station.In the art, the general timing offset by determining different base station based on edge customer equipment (user equipment, UE) between station.Edge UE refers to the UE in the superimposed coverage area of adjacent base station between standing.Specifically, serving BS utilizes formula Tdif=Taccess-Tneigh, the timing offset Tdif of the serving BS and the adjacent base station of the serving BS is obtained.Wherein, at the time of Taccess is that the serving BS detects the accidental access signal that UE is sent, at the time of Tneigh is that the adjacent base station detects the accidental access signal.This method only considered Taccess and Tneigh, therefore the accuracy of identified timing offset is lower.

It can be observed to be, the technology that positions UE poor by the signal transmission time between measurement UE and different base station up to time difference (observed time difference of arrival, OTDOA) technology.In the art, generally determine signal transmission time difference △ T by the following method: location-server determines the timing offset TdifGPS of different base station using global positioning system (global positioning system, GPS) technology；Then it receives the timing offset TdifUE that the UE measurement that UE is reported obtains and △ T is obtained according to formula △ T=TdifUE-TdifGPS.This method needs to determine timing offset TdifGPS based on GPS technology, can just further determine that signal transmission time difference △ T, therefore smaller scope of application.

Summary of the invention

The embodiment of the present application provides a kind of method and apparatus of time of measuring difference, and to solve the problems, such as at least one of following problems: the accuracy of identified timing offset is lower；Determine between UE and different base station signal transmission time difference during, because rely on GPS technology caused by smaller scope of application the problem of.

In a first aspect, providing a kind of method of time of measuring difference, this method may include: that first base station receives the first reference signal that UE is sent, and the time of reception will be denoted as Tr1；First base station receives the Tr2 that the second base station is sent, at the time of Tr2 is that the second base station that the second base station measurement obtains receives the first reference signal；First base station sends the second reference signal to UE；First base station receives the TdifUE that UE is sent, and TdifUE is difference at the time of receiving the third reference signal that the second base station is sent at the time of the UE that UE measurement obtains receives the second reference signal that first base station is sent with UE；First base station determines at least one of timing offset Tdif and signal transmission time difference △ T of first base station and the second base station according to Tr1, Tr2 and TdifUE；Wherein, △ T refers to, the difference of transmission time and signal transmission time UE and second base station between of the signal between UE and first base station.In the technical solution, on the one hand, during determining timing offset, not only used Tr1 and Tr2, also use TdifUE；Due to having incidence relation between TdifUE, Tdif and △ T, △ T can be compensated, to improve accuracy by the incidence relation between them.In addition, needing not rely on GPS technology, therefore the scope of application is larger during determining signal transmission time difference.Optionally, first base station can be the serving BS of UE.Second base station can be the non-serving base stations of UE.Optionally, UE is located at the overlapping region of the coverage area of first base station and the coverage area of the second base station.

In a kind of possible design, first base station is according to Tr1, Tr2 and TdifUE, the timing offset Tdif for determining first base station Yu the second base station may include: first base station according to formula Tdif=(TdifUE+ (Tr1-Tr2))/2, obtain Tdif.The possible design provides the implementation of determining Tdif a kind of.

In a kind of possible design, first base station determines that signal transmission time is poor according to Tr1, Tr2 and TdifUE △ T may include: first base station according to formula △ T=(TdifUE- (Tr1-Tr2))/2, obtain △ T.The possible design provides the implementation of determining △ T a kind of.

In a kind of possible design, this method, which can also include: first base station, sends the first configuration information to UE；First configuration information is used to indicate UE and sends the first reference signal at the first measurement moment.The optional implementation can be applied in the scene that UE does not have upstream data to need to transmit, and indicate to send uplink reference signals (i.e. the first reference signal) to UE by first base station in the scene, to complete the measurement of Tdif and/or △ T.

Optionally, the first configuration information can also include measurement period, be used to indicate UE since the first measurement moment every the measurement period of integral multiple, send first reference signal.The optional implementation provides a kind of method of first base station instruction UE periodicity sending uplink reference signals (i.e. the first reference signal).In this way, first base station can (including Tdif and/or △ T) poor by multiple time of measuring, so as to improve measurement accuracy.

In a kind of possible design, this method, which can also include: first base station, sends the first configuration information to UE；First configuration information is used to indicate UE and sends the first reference signal at the first measurement moment；First base station sends the second reference signal to UE at the first measurement moment；First base station sends the second configuration information to the second base station；Wherein, the second configuration information is used to indicate the second base station and sends third reference signal to UE at the second measurement moment；Second measurement moment was the sum of the timing adjustment amount of the first measurement moment first base station opposite with the second base station.In this way, can make first base station, the second base station and UE as far as possible while send reference signal, to reduce measurement error caused by the movement because of UE.Wherein, which can be the second base station with respect to the value that the timing offset of first base station negates.Wherein, which can be the timing offset obtained according to the method in the prior art.It should be noted that, it is to be illustrated so that first base station is synchronous with the clock of UE as an example herein, actually, if first base station is asynchronous with the clock of UE, then above-mentioned first base station sends third reference signal to UE at the first measurement moment, may alternatively be: first base station measures the moment to UE transmission third reference signal in third, wherein the third measurement moment is the sum of the timing adjustment amount at the first measurement moment Yu first base station relative termination.

Optionally, the first configuration information can also include measurement period, be used to indicate UE since the first measurement moment every the measurement period of integral multiple, send first reference signal.In this case, first base station sends the second reference signal to UE at the first measurement moment, may include: first base station starts the measurement period every integral multiple at the first measurement moment, sends second reference signal to UE.Also, it can also include measurement period in the second configuration information, be used to indicate the second base station since the second measurement moment every the measurement period of integral multiple, send a third reference signal.In this way, first base station can (including Tdif and/or △ T) poor by multiple time of measuring, so as to improve measurement accuracy.

Second aspect, provides a kind of method of time of measuring difference, and this method may include: that the second base station receives UE the first reference signal of transmission, and the time of reception will be denoted as Tr2；Second base station sends third reference signal to UE, and third reference signal determines TdifUE for UE；TdifUE is poor TdifUE at the time of receiving the third reference signal that the second base station is sent at the time of the UE that UE measurement obtains receives the second reference signal that first base station is sent with UE, and sends TdifUE to first base station；Second base station sends Tr2 to first base station, and Tr2, according to Tr1, TdifUE and Tr2, determines at least one of timing offset Tdif and signal transmission time difference △ T of first base station and the second base station for first base station；Wherein, at the time of Tr1 is first base station the first reference signal of reception that first base station measurement obtains；△ T refers to, the difference of transmission time and signal transmission time UE and second base station between of the signal between UE and first base station.

In a kind of possible design, this method can also include: that the second base station receives the second configuration information that first base station is sent；Wherein, the second configuration information included the second measurement moment；Second measurement moment was the first measurement moment and the Two base stations with respect to first base station the sum of timing adjustment amount, first measurement the moment be first base station to UE send the second reference signal at the time of；Second base station sends third reference signal to UE at the second measurement moment.

In a kind of possible design, the second configuration information can also include measurement period；Second base station sends third reference signal to UE at the second measurement moment, may include: the second base station since the second measurement moment every the measurement period of integral multiple, sends a third reference signal.

The explanation of related content and the description of beneficial effect can be with reference to corresponding implementations in above-mentioned first aspect in any implementation of second aspect, and details are not described herein again.

The third aspect, a kind of method of time of measuring difference is provided, this method may include: that UE sends the first reference signal, first reference signal determines Tr1 for first base station, and Tr2 is determined for the second base station, wherein, at the time of Tr1 is that first base station receives the first reference signal, at the time of Tr2 is that the second base station receives the first reference signal；UE receives the second reference signal that first base station is sent；UE receives the third reference signal that the second base station is sent；UE determines TdifUE；TdifUE is difference at the time of receiving the third reference signal that the second base station is sent at the time of UE receives the second reference signal that first base station is sent with UE；UE sends TdifUE to first base station, and TdifUE, according to Tr1, Tr2 and TdifUE, determines at least one of timing offset Tdif and signal transmission time difference △ T of first base station and the second base station for first base station；Wherein, △ T refers to, the difference of transmission time and signal transmission time UE and second base station between of the signal between UE and first base station.

In a kind of possible design, this method can also include: that UE receives the first configuration information that first base station is sent, and the first configuration information included the first measurement moment.In this case, UE sends the first reference signal, it may include: UE in first the first reference signal of measurement moment transmission.

Optionally, the first configuration information further includes measurement period；It may include: to be used to indicate UE since the first measurement moment every the measurement period of integral multiple that UE, which sends the first reference signal at the first measurement moment, send first reference signal.

In a kind of possible design, this method can also include: that UE receives the first configuration information that first base station is sent；Wherein, the first configuration information included the first measurement moment, and the sum of timing adjustment amount of the first measurement moment first base station opposite with the second base station was the second measurement moment, at the time of the second measurement moment was that the second base station sends third reference signal to UE.In this case, UE sends the first reference signal, it may include: UE in first the first reference signal of measurement moment transmission.

The explanation of related content and the description of beneficial effect can be with reference to corresponding implementations in above-mentioned first aspect in any implementation of the third aspect, and details are not described herein again.

Fourth aspect provides a kind of base station, which has the function of realizing first base station behavior in above method embodiment.The function can also execute corresponding software realization by hardware realization by hardware.The hardware or software include one or more modules corresponding with above-mentioned function.

In a kind of possible design, which may include: processor, memory, bus and communication interface；The memory is for storing computer executed instructions, the processor is connect with the memory by the bus, when base station operation, which executes the computer executed instructions of memory storage, so that the method that the base station executes the time of measuring difference such as above-mentioned first aspect any one.

5th aspect, provides a kind of computer readable storage medium, for being stored as computer software instructions used in above-mentioned first base station, when run on a computer, the method for allowing computer to execute the time of measuring difference of any one of above-mentioned first aspect.

6th aspect, provides a kind of computer program product comprising instruction, when run on a computer, the method for allowing computer to execute the time of measuring difference of any one of above-mentioned first aspect.

7th aspect, provides a kind of base station, which has the function of realizing the second base station behavior in above method embodiment.The function can also execute corresponding software realization by hardware realization by hardware.The hardware or software include one or more modules corresponding with above-mentioned function.

In a kind of possible design, which may include: processor, memory, bus and communication interface；The memory is for storing computer executed instructions, the processor is connect with the memory by the bus, when base station operation, which executes the computer executed instructions of memory storage, so that the method that the base station executes the time of measuring difference such as above-mentioned second aspect any one.

Eighth aspect provides a kind of computer readable storage medium, for being stored as computer software instructions used in above-mentioned second base station, when run on a computer, the method for allowing computer to execute the time of measuring difference of any one of above-mentioned second aspect.

9th aspect, provides a kind of computer program product comprising instruction, when run on a computer, the method for allowing computer to execute the time of measuring difference of any one of above-mentioned second aspect.

Tenth aspect, provides a kind of UE, which has the function of realizing UE behavior in above method embodiment.The function can also execute corresponding software realization by hardware realization by hardware.The hardware or software include one or more modules corresponding with above-mentioned function.

In a kind of possible design, which may include: processor, memory, bus and communication interface；The memory is for storing computer executed instructions, the processor is connect with the memory by the bus, when base station operation, which executes the computer executed instructions of memory storage, so that the method that the UE executes the time of measuring difference such as above-mentioned third aspect any one.

On the one hand tenth, provides a kind of computer readable storage medium, for being stored as computer software instructions used in above-mentioned UE, when run on a computer, the method for allowing computer to execute the time of measuring difference of any one of above-mentioned third aspect.

12nd aspect, provides a kind of computer program product comprising instruction, when run on a computer, the method for allowing computer to execute the time of measuring difference of any one of above-mentioned third aspect.

The technical effect of any device of above-mentioned offer, computer-readable medium or computer program product can be found in technical effect brought by corresponding method, and details are not described herein again.

Detailed description of the invention

Fig. 1 is a kind of schematic diagram of the timer clock of different base station provided by the embodiments of the present application；

A kind of configuration diagram for system that Fig. 2 is applicable in by technical solution provided by the embodiments of the present application；

Fig. 3 is a kind of structural schematic diagram of base station provided by the embodiments of the present application；

Fig. 4 is a kind of structural schematic diagram of UE provided by the embodiments of the present application；

Fig. 5 is a kind of interaction schematic diagram of the method for time of measuring difference provided by the embodiments of the present application；

Fig. 6 is a kind of schematic diagram of downlink reference signal implementation procedure provided by the embodiments of the present application；

Fig. 7 is a kind of schematic diagram of uplink reference signals implementation procedure provided by the embodiments of the present application；

Fig. 8 is the interaction schematic diagram of the method for another time of measuring difference provided by the embodiments of the present application；

Fig. 9 is a kind of interaction schematic diagram of the method for determining initial timing deviation provided by the embodiments of the present application；

Figure 10 is a kind of structural schematic diagram of first base station provided by the embodiments of the present application；

Figure 11 is a kind of structural schematic diagram of second base station provided by the embodiments of the present application；

Figure 12 is a kind of structural schematic diagram of UE provided by the embodiments of the present application.

Specific embodiment

The relevant technologies involved in the application and part term are explained first, are understood with helping reader:

A timer clock is provided in each base station, each base station is all based on the timer clock being arranged in itself and carries out timing, and carries out relevant operation according to the identified moment.For example, first base station sends the first reference signal at the first measurement moment, refers to the first measurement moment determined by timer clock that first base station is arranged in based on first base station, send the first reference signal.Second base station sends third reference signal at the second measurement moment, refers to the second measurement moment determined by timer clock that the second base station is arranged in based on the second base station, sends third reference signal.For another example, measured by first base station at the time of the first reference signal of reception, at the time of referring to the first reference signal of reception that first base station is recorded based on the timer clock being arranged in its own.

The timer clock of different base station may be the same or different.If the timer clock of different base station is different, at the time of will lead to the same reference moment can be recorded as different by different base station.For example, Fig. 1 show reference base station, base station 1 and base station 2 timer clock schematic diagram.As shown in Figure 1, if with reference to the moment be based on timer clock 0 at the time of t1, reference the moment that base station 1 is recorded be t2, the reference moment that base station 2 is recorded be t0, shown in dotted rectangle as shown in figure 1.In this way, this 3 base stations send signal simultaneously, it specifically may is that reference base station sends signal at the t1 moment based on timer clock 0, base station 1 sends signal at the t2 moment based on timer clock 1, and base station 2 sends signal at the t0 moment based on timer clock 2.

Timing offset between different base station refers to that different base station sends the time difference of the downlink reference signal of subframe represented by the same subframe number of same wireless frame number.For example, base station 2 sends the downlink reference signal of the 1st subframe of the 2nd radio frames at the T2 moment if base station 1 sends the downlink reference signal of the 1st subframe of the 2nd radio frames at the T1 moment, then the timing offset of base station 1 and base station 2 is T2-T1；Wherein, here T1 and T2 refers to the absolute moment, that is, is based at the time of same timer clock (such as GPS time).

Signal transmission time between UE and different base station is poor, refers to transmission time of the signal between UE and base station, the difference with transmission time of the signal between the UE and another base station.For example, transmission time of the signal between UE and base station 2 is Tp2 if transmission time of the signal between UE and base station 1 is Tp1, then signal transmission time difference is Tp2-Tp1.

Up direction refers to the direction from UE to base station.Such as uplink reference signals are the reference signals that UE is sent to base station.The uplink reference signals can include but is not limited to following any: accidental access signal, demodulated reference signal (demodulation reference signal, DMRS), detection reference signal (sounding reference signal, SRS)；It is also possible to a kind of newly-designed uplink reference signals.

Down direction refers to the direction from base station to UE.Such as downlink reference signal is the reference signal that base station is sent to UE.The downlink reference signal can include but is not limited to following any: cell common reference signal (cell-specific reference signal, CRS), location reference signals (positioning reference signal, PRS), channel state information reference signals (channel state information reference signal, CSI-RS)；It is also possible to a kind of newly-designed downlink reference signal.

The terms "and/or", only a kind of incidence relation for describing affiliated partner, indicates may exist three kinds of relationships, for example, A and/or B, can indicate: individualism A exists simultaneously A and B, these three situations of individualism B.Character "/" herein, typicallys represent the relationship that forward-backward correlation object is a kind of "or"." multiple " are Refer to two or more.Term " first " and " second " herein etc. are rather than to be used for the particular order of description object for distinguishing different objects.

It should be noted that in the embodiment of the present application, it is believed that the timer clock of UE is identical as the timer clock of base station (i.e. the serving BS of the UE) of service is provided for the UE.It should be understood that those of ordinary skill in the art can be obtained according to technical solution described herein, reasoning the timer clock of the timer clock of UE and the serving BS of the UE it is different in the case where implementation, repeat no more herein.

Technical solution provided by the embodiments of the present application can be applied in system as shown in Figure 2.System shown in Fig. 2 includes: first base station 100, the second base station 200 and UE300.Wherein, there is overlapping region, UE300 is located in the overlapping region between the coverage area of first base station 100 and the coverage area of the second base station 200.It should be understood that the merely illustrative figure of Fig. 2.The number of base station and the number of UE do not constitute restriction to technical solution provided by the embodiments of the present application.In practical applications, it can according to need to be different from the number of the number of base station shown in Fig. 2 and UE and carry out network deployment.It is hereinafter to be illustrated for determining the timing offset of first base station and the second base station based on a UE.It should be understood that the timing offset of first base station and the second base station can be the mean value of multiple timing offset obtained according to the above technical solution if there is multiple UE in the coverage area of first base station and the coverage area of the second base station.

System shown in Fig. 2 can be various communication systems, such as current 2G, 3G, 4G communication system and next generation communication system and future evolution network, such as 5G communication system.Such as, global system for mobile communications (global system for mobile communication, GSM), CDMA (code division multiple access, CDMA), wideband code division multiple access (wideband code division multiple access, WCDMA), time division multiple acess (time division multiple access, TDMA), frequency division multiple access (frequency division multiple access, FDMA), orthogonal frequency division multiple access (orthogonal f Requency-division multiple access, OFDMA), single-carrier frequency division multiple access (single carrier FDMA, SC-FDMA), long term evolution (long term evolution, LTE) system and other such communication systems.

Base station (including first base station 100 and the second base station 200), which can be, to be referred to the accession in net in the sky on interface by the equipment of one or more sectors and wireless terminal communications.The air frame that base station can be used for receive mutually is converted with IP grouping, as the router between wireless terminal and the rest part of access net, wherein the rest part for accessing net may include Internet protocol (IP) network.Attribute management of the base station also tunable to air interface.Such as, base station can be base station (the base transceiver station in GSM or CDMA, BTS), it is also possible to the base station (NodeB) in WCDMA, it can also be evolved base station (NodeB or the eNB or e-NodeB in LTE, evolutional Node B), the application does not limit.Base station can also be the network equipment in the following 5G network or the network equipment in the PLMN network of the following evolution；It can also be wearable device or mobile unit etc..

UE300 can include but is not limited to following any: mobile phone, tablet computer, laptop, Ultra-Mobile PC (ultra-mobile personal computer, UMPC), net book, personal digital assistant (personal digital assistant, PDA) etc..

As shown in figure 3, being a kind of structural schematic diagram of base station provided by the embodiments of the present application.The base station can be first base station 100, be also possible to the second base station 200.Base station shown in Fig. 3 may include: at least one processor 21, and, memory 22, communication interface 23 and communication bus 24.

Processor 21 is the control centre of base station, specifically can be a processing element, is also possible to the general designation of multiple processing elements.For example, processor 21 can be a central processing unit (central processing unit, CPU), It is also possible to specific integrated circuit (application specific integrated circuit, ASIC), or it is arranged to implement one or more integrated circuits of technical solution provided by the embodiments of the present application, such as: one or more microprocessors (digital signal processor, DSP), or, one or more field programmable gate array (field programmable gate array, FPGA).Wherein, processor 21 can execute the various functions of base station by running or executing the software program being stored in memory 22, and the data that calling is stored in memory 22.

In the concrete realization, as one embodiment, processor 21 may include one or more CPU, such as CPU0 and CPU1 shown in Fig. 3.

In the concrete realization, as one embodiment, base station may include multiple processors, such as processor 21 and processor 25 shown in Fig. 3.Each of these processors can be a single core processor (single-CPU), be also possible to a multi-core processor (multi-CPU).Here processor can refer to one or more equipment, circuit, and/or the processing core for handling data (such as computer program instructions).

Memory 22 can be read-only memory (read-only memory, ROM) or the other kinds of static storage device of static information and instruction can be stored, random access memory (random access memory, RAM) or the other kinds of dynamic memory of information and instruction can be stored, it is also possible to Electrically Erasable Programmable Read-Only Memory (electrically erasable programmable read-only memory, EEPROM), CD-ROM (compact disc read-only memory, ) or other optical disc storages CD-ROM, optical disc storage (including compression optical disc, laser disc , optical disc, Digital Versatile Disc, Blu-ray Disc etc.), magnetic disk storage medium or other magnetic storage apparatus or can be used in carrying or store the desired program code with instruction or data structure form and can by any other medium of computer access, but not limited to this.Memory 22, which can be, to be individually present, and is connected by communication bus 24 with processor 21.Memory 22 can also be integrated with processor 21.Wherein, memory 22 is for store in execution technical solution provided by the embodiments of the present application software program performed by first base station or the second base station, and execution is controlled by processor 21.

Communication interface 23, it can be the device using any transceiver one kind, for with other equipment or communication, such as Ethernet, wireless access network (radio access network, RAN), WLAN (wireless local area metworks, WLAN) etc..Communication interface 23 may include that receiving unit realizes that receive capabilities and transmission unit realize sending function.

Communication bus 24, it can be industry standard architecture (industry standard architecture, ISA) bus, external equipment interconnection (peripheral component interconnect, PCI) bus or extended industry-standard architecture (extended industry standard architecture, EISA) bus etc..The bus can be divided into address bus, data/address bus, control bus etc..Only to be indicated with a thick line in Fig. 3, it is not intended that an only bus or a type of bus convenient for indicating.

Device structure shown in Fig. 3 does not constitute the restriction to base station, may include perhaps combining certain components or different component layouts than illustrating more or fewer components.

As shown in figure 4, being a kind of structural schematic diagram of UE provided by the embodiments of the present application.UE shown in Fig. 4 may include: at least one processor 31, and, memory 32, display 33 and transceiver 34.

Processor 31 is the control centre of UE, can be a processor, is also possible to the general designation of multiple processing elements.Wherein, processor 31 can execute the various functions of UE by running or executing the software program being stored in memory 32, and the data that calling is stored in memory 32.Memory 32 is used to store software program performed by the UE executed in technical solution provided by the embodiments of the present application, and execution is controlled by processor 31.

Associated description about processor 31, memory 32 and transceiver 34 can refer to above, and details are not described herein again.

In concrete implementation, as one embodiment, processor 31 may include one or more CPU, such as CPU0 and CPU1 shown in Fig. 4.

In the concrete realization, as one embodiment, UE may include multiple processors, such as processor 31 and processor 35 shown in Fig. 4.

Display 33 can be used for showing information input by user or be supplied to the information of user and the various menus of UE etc..Display 33 may include display panel 331.Optionally, display panel 331 can be configured using liquid crystal display (liquid crystal display, LCD), Organic Light Emitting Diode (organic light-emitting diode, OLED) etc..

Device structure shown in Fig. 4 does not constitute the restriction to UE, may include perhaps combining certain components or different component layouts than illustrating more or fewer components.Although being not shown, UE can also include battery, camera, bluetooth module etc., and details are not described herein.

It is illustrated below with reference to method of the system architecture shown in Fig. 2 to time of measuring difference provided by the embodiments of the present application.It should be noted that being hereinafter so that " first base station is the serving BS of UE；Second base station is the adjacent base station of first base station, and the overlapped coverage of the coverage area of the second base station and first base station " for be illustrated.

As shown in figure 5, being a kind of interaction schematic diagram of the method for time of measuring difference provided by the embodiments of the present application.Method shown in fig. 5 may comprise steps of S101~S111:

S101: first base station sends downlink reference signal 1 to UE.

Downlink reference signal 1 may be considered the second reference signal described herein.

S102:UE receives the downlink reference signal 1 that first base station is sent, and records Tu1 at the time of the UE receives downlink reference signal 1.

First base station and UE can make an appointment transmission downlink reference signal 1 when used time-frequency domain resources, UE can receive downlink reference signal 1 on the running time-frequency resource, and will initially receive downlink reference signal 1 at the time of is labeled as Tu1.Tu1 is the moment based on determined by the timer clock of UE.If the timer clock of UE is identical as the timer clock of first base station, it can be considered that Tu1 is the moment based on determined by the timer clock of first base station.

S103: the second base station sends downlink reference signal 2 to UE.

Downlink reference signal 2 may be considered third reference signal described herein.

In one example, downlink reference signal 1 can be the downlink reference signal of i-th of subframe of n-th of the radio frames recorded based on the clock in first base station.Downlink reference signal 2 can be the downlink reference signal of i-th of subframe of n-th of the radio frames recorded based on the clock in the second base station.Wherein, n is greater than or equal to 1 integer.I is greater than or equal to 1, and is less than or equal to the integer of the sum of the subframe in a radio frames included.

S104:UE receives the downlink reference signal 2 that the second base station is sent, and records Tu2 at the time of UE receives downlink reference signal 2.

Second base station and UE can make an appointment transmission downlink reference signal 2 when used time-frequency domain resources, UE can receive downlink reference signal 2 on the running time-frequency resource, and will initially receive downlink reference signal 1 at the time of is labeled as Tu2.It is considered that Tu2 is the moment based on determined by the timer clock of first base station.

The embodiment of the present application is to the execution sequence of S101~S102 and S103~S104 without limiting, such as S103~S104 is executed after S101~S102 can be first carried out, S101~S102 is executed after S103~S104 can also be first carried out, may also be performed simultaneously S101~S102 and S103~S104.It should be understood that " simultaneously " described herein and " successively " are for the moment based on determined by the same timer clock.

S105:UE calculates the difference of Tu1 and Tu2, obtains TdifUE.

S106:UE sends TdifUE to first base station.First base station receives the TdifUE that UE is sent.

S107:UE sends uplink reference signals to first base station.

Uplink reference signals may be considered the first reference signal described herein.

In an alternative embodiment, before S107, this method, which can also include: first base station, sends configuration information to UE, wherein the configuration information is used to indicate the UE and sends uplink reference signals at the measurement moment.In this case, S107, which may include: UE, sends uplink reference signals to first base station at the measurement moment.Optionally, configuration information further includes measurement period；In this case, since UE can send a uplink reference signals measuring the moment every the measurement period of integral multiple.The uplink reference signals sent in different measurement periods can be the same or different.

In an alternative embodiment, since UE has upstream data to need to send, i.e., uplink reference signals can be sent to base station, in this case, can determine Tdif and/or △ T by the uplink reference signals.

S108: first base station receives the uplink reference signals that UE is sent, and records Tr1 at the time of first base station receives the uplink reference signals.

First base station and UE can make an appointment transmitting uplink reference signal when used time-frequency domain resources, first base station can receive the uplink reference signals on the running time-frequency resource, and labeled as Tr1 at the time of will initially receive the uplink reference signals.Tr1 is the moment based on determined by the timer clock of first base station.

S109: the second base station receives the uplink reference signals that UE is sent, and records Tr2 at the time of the second base station receives the uplink reference signals.

First base station and UE can make an appointment transmitting uplink reference signal when used time-frequency domain resources, then first base station can notify the information of the running time-frequency resource to the second base station, in this way, second base station can receive the uplink reference signals on the running time-frequency resource, and labeled as Tr2 at the time of will initially receive the uplink reference signals.Tr2 is the moment based on determined by the timer clock of the second base station.

S110: the second base station sends Tr2 to first base station.First base station receives the Tr2 that the second base station is sent.

For the embodiment of the present application to the execution sequence of S108 and S109~S110 without limiting, specific execution sequence can be determines according to actual conditions.Such as S109~S110 is executed after 108 being first carried out, S108 is executed after S109~S110 can also be first carried out, may also be performed simultaneously S108 and S109~S110.It should be understood that " simultaneously " described herein and " successively " are for the moment based on determined by the same timer clock.

In the embodiment of the present application, the process of S101~S107 can be known as to the implementation procedure of downlink reference signal；The process of S108~S110 is known as to the implementation procedure of uplink reference signals.The embodiment of the present application can be without limiting to the execution sequence of the two processes.

S111: first base station obtains the timing offset Tdif of first base station Yu the second base station according to formula Tdif=(TdifUE+ (Tr1-Tr2))/2；And according to formula △ T=(TdifUE- (Tr1-Tr2))/2, signal transmission time difference △ T is obtained.

It should be understood that according to two formula in S111 it is found that the value that the Tr2 that first base station is the Tr1 recorded according to first base station and the second base station is recorded is obtained after subtracting each other, obtains Tdif and △ T's.Therefore, it if the relative position between relative position and UE and the second base station between UE and first base station is fixed and invariable, or fluctuates in allowed limits, then in S107, at the time of UE can not be limited sending uplink reference signals.If the fluctuation range of the relative position between UE and first base station and the second base station is larger, in order to reduce the movement because of UE caused by Tr1-Tr2 it is inaccurate, so as to cause measurement result it is inaccurate, can implement using shown in following FIG. 8 Example measurement Tdif and/or △ T.

The embodiment of the present application is to the execution sequence of two steps in S111 without limiting.

Illustrate the derivation process of the formula in S111 below:

As shown in fig. 6, being the schematic diagram of downlink reference signal implementation procedure.According to the definition of Tdif it is found that differing Tdif between at the time of sending downlink reference signal 2 with the second base station at the time of first base station sends downlink reference signal 1.During being somebody's turn to do, the relationship between Tdif, Tp1, Tp2, Tu1, Tu2 and TdifUE is as shown in Figure 6.Wherein, Tp1 is transmission time of the signal between UE and first base station, and Tp2 is transmission time of the signal between UE and the second base station.It is hereby achieved that following formula 1:

TdifUE=Tdif+ (Tp2-Tp1).

As shown in fig. 7, being the schematic diagram of uplink reference signals implementation procedure.During being somebody's turn to do, the relationship between Tp1, Tp2, Tr1 and Tr2 is as shown in Figure 7.According to the definition of Tdif, available following formula 2:

Tdif=(Tr1-Tp1)-(Tr2-Tp2), wherein at the time of Tr1-Tp1 is that the UE that first base station measurement obtains sends uplink reference signals；At the time of Tr2-Tp1 is that the UE that the second base station measurement obtains sends uplink reference signals.

According to the available following formula 3 of formula 2:

Tr1-Tr2=Tdif- (Tp2+Tp1).

According to formula 1 and formula 3, it can be deduced that:

Tdif=(TdifUE+ (Tr1-Tr2))/2,

△ T=Tp2-Tp1=(TdifUE- (Tr1-Tr2))/2.

In technical solution provided by the embodiments of the present application, on the one hand, during determining timing offset Tdif, the UE for having used UE measurement to obtain receives the time difference TdifUE for the reference signal that different base station is sent, due to having incidence relation between TdifUE, Tdif and transmission time difference △ T, such as TdifUE=Tdif+ △ T, therefore, during calculating Tdif, it can be by measuring TdifUE, the signal transmission time compensated between UE and different base station is poor (i.e. △ T), and then improves accuracy.In addition, needing not rely on GPS technology, therefore the scope of application is larger during determining △ T.

It is understood that, the accidental access signal used compared to the prior art is as reference signal, if the reference signal in technical solution provided by the embodiments of the present application is other reference signals in addition to accidental access signal, such as downlink reference signal uses SRS using CRS or uplink reference signals, then the measurement accuracy of timing offset can be promoted because of the wider bandwidth of CRS and SRS.In addition, obtaining according to technical solution provided by the embodiments of the present application, signal transmission time is poor, then can make the various scenes using signal transmission time difference, such as OTDOA technology, because not depending on GPS technology, and expand the scope of application.

It should be noted that currently, being also based on switching UE between station determines timing offset.Switch UE between standing and refers to edge UE between the station that serving BS is switched to target BS from source base station.Specifically, source base station utilizes formula Tdif=(Taccess-Tneigh)-(Tp1-Tp2), the timing offset Tdif of the serving BS and the adjacent base station of the serving BS is obtained.Wherein, the meaning of Taccess and Tneigh is similar as above, wherein Taccess can be a kind of specific implementation of Tr1, and Tneigh can be a kind of specific implementation of Tr2.Tp1 is transmission time of the signal between UE and source base station, and Tp2 is transmission time of the signal between UE and target BS.Wherein, Tp1-Tp2 is the reaching time-difference (time difference of arrival, TDOA) of the serving BS and the adjacent base station.Compared with the technical solution, technical solution provided by the embodiments of the present application switches UE between being not needed upon station, can be realized based on edge UE between station, therefore the scope of application is larger.

Above-mentioned is that a downlink reference signal 1 is sent with first base station, is illustrated for one downlink reference signal 2 of the second base station transmission.In actual implementation, first base station periodically can send downlink reference signal 1 to UE, and the second base station periodically can send downlink reference signal 2 to UE.Wherein, a cycle can be a subframe.In this case, UE can know the initial time for the radio frames that the clock based on first base station is recorded and the frame number of radio frames by the system message that first base station is sent, for example, the initial time of radio frames are as follows: 1ms, 2ms, 3ms ...；Still, 1.1ms, 2.1ms, 3.1ms ... etc., so that being inferred to received downlink reference signal 1 is the downlink reference signal 1 in which subframe of which radio frames.Similarly, the system message that UE can be sent by the second base station knows received downlink reference signal 2 is the downlink reference signal 2 in which subframe of which radio frames.Then, any one downlink reference signal 2 that UE can be sent by any one downlink reference signal 1 and the second base station for recording first base station, and wireless frame number and subframe number in conjunction with where the two downlink reference signals, obtain Tdif.Such as, it is t1 that UE, which receives first base station at the time of downlink reference signal 1 of the 1st subframe (radio frames and subframe are determined based on the clock of first base station) transmission of the 1st radio frames, it is t2 that the second base station, which is received, at the time of downlink reference signal 2 of the 2nd subframe (radio frames and subframe are determined based on the clock of the second base station) transmission of the 1st radio frames, then TdifUE=t2₀- t1, wherein t2₀For the difference of t2 and subframe lengths.

As shown in figure 8, the interaction schematic diagram of the method for another time of measuring difference provided by the embodiments of the present application.Method shown in Fig. 8 may comprise steps of S201~S216:

S201: first base station determines the initial timing deviation Tdif0 of first base station and the second base station based on edge UE between station.

Tdif0 can be greater than 0, might be less that 0.It is poor therefore inaccurate that the Tdif0 determined in S201 does not account for the signal transmission time between UE and different base station.The specific method of S201 can be as shown in Figure 9.Serving BS in Fig. 9 can be the first base station in the present embodiment, and the adjacent base station of the serving BS can be the second base station in the present embodiment.Method shown in Fig. 9 may include steps of S1~S9:

S1: first base station sends blind Detecting request to the second base station.Second base station receives blind Detecting request.

S2: the second base station starts preamble (lead code) blind Detecting and receives.

S3: the second base station sends blind Detecting response to first base station.First base station receives blind Detecting response.

S4: first base station sends random access order to UE.UE receives the random access order.

S5:UE initiates random access to first base station, i.e. UE sends accidental access signal to first base station.

S6: first base station blind Detecting accidental access signal, Taccess at the time of obtaining receiving accidental access signal.

S7: the second base station blind Detecting accidental access signal, Tneigh at the time of obtaining receiving accidental access signal.

S8: the second base station sends blind Detecting as a result, the blind Detecting result includes Tneigh to first base station.First base station receives the blind Detecting result.

S9: first base station obtains Tdif0 according to formula Tdif0=Taccess-Tneigh.

S202: first base station determined for the first measurement moment.

The embodiment of the present application is to the execution sequence of S201 and S202 without limiting.

S203: first base station sends downlink reference signal 1 to UE at the first measurement moment.

Wherein, the first measurement moment was the moment based on determined by the timer clock of first base station.

S204:UE is in Tu1 reception to the downlink reference signal 1.

S205: the first measurement moment was added by first base station with Tdif0, obtained for the second measurement moment.

If Tdif0 > 0, the second measurement moment is less than the first measurement moment；If Tdif0 < 0, the second measurement moment is less than the first measurement moment.

S206: first base station sends the second configuration information to the second base station, and the second configuration information included the second measurement moment, is used to indicate the second base station at the second measurement moment and sends downlink reference signal 2 to UE.Second base station receives the second configuration information.

Wherein, the second measurement moment can be understood as the moment based on determined by the timer clock of the second base station.

It should be understood that in the present embodiment, determining for the second measurement moment by first base station, and the second measurement moment was carried and is sent to the second base station in the second configuration information.Optionally, in actual implementation, the first measurement moment and Tdif0 carrying can also be sent to the second base station by first base station in the second configuration information, and determine for the second measurement moment by the second base station.

S207: the second base station sends downlink reference signal 2 to UE at the second measurement moment according to the second configuration information.

The downlink reference signal 2 that S208:UE is sent in Tu2 reception to the second base station.

S209:UE calculates the difference of Tu2 and Tu1, obtains TdifUE.

S210:UE sends the second measurement report to first base station, and the second measurement report includes TdifUE.First base station receives second measurement report.

S211: first base station sends the first configuration information to UE, and the first configuration information included the first measurement moment.UE receives first configuration information.

S212:UE sends uplink reference signals to first base station according to the first configuration information, at the first measurement moment.

S213: first base station is in the Tr1 reception uplink reference signals.

S214: the second base station is in the Tr2 reception uplink reference signals.

S215: the second base station sends the first measurement report to first base station, and the first measurement report includes Tr2.First base station receives first measurement report.

S216: first base station is according to formula Tdif=(TdifUE+ (Tr1-Tr2))/2, obtain the practical timing offset Tdif of first base station Yu the second base station, and according to formula △ T=(TdifUE- (Tr1-Tr2))/2, the transmission time difference △ T of first base station and the second base station is obtained.

In technical solution provided in this embodiment, the timing offset Tdif0 obtained based on edge UE measurement between station makes first base station, the second base station and UE that can substantially send reference signal simultaneously, the influence of movement because of UE to the accuracy of measurement result can be reduced in this way, to improve measuring accuracy.

In an alternative embodiment, the first configuration information can also include measurement period, be used to indicate UE since the first measurement moment every the measurement period of integral multiple, send a uplink reference signals.In this case, S203, which may include: first base station, starts the measurement period every integral multiple at the first measurement moment, a downlink reference signal 1 is sent to UE.Also, it can also include the measurement period in the second configuration information, be used to indicate the second base station since the second measurement moment every the measurement period of integral multiple, send a downlink reference signal 2.

The embodiment of the present application is to the implementation of the specific value of measurement period and the specific value for how determining measurement period without limiting.The optional implementation is used for periodic measurement Tdif and/or △ T.It should be understood that the reference signal transmitted in different measurement periods can be the same or different, wherein the reference signal includes uplink reference signals, at least one of downlink reference signal 1 and downlink reference signal 2.

It should be noted that in the embodiment of the present application, on down direction, UE can support the measurement of alien-frequency district；On up direction, UE can alternately send reference signal in different frequency points.

It is above-mentioned that mainly scheme provided by the embodiments of the present application is described from the angle of interaction between each network element.It is understood that each network element, such as first base station, the second base station or UE, in order to realize the above functions, It comprises execute the corresponding hardware configuration of each function and/or software module.Those skilled in the art should be readily appreciated that, unit and algorithm steps described in conjunction with the examples disclosed in the embodiments of the present disclosure, and the application can be realized with the combining form of hardware or hardware and computer software.Some function is executed in a manner of hardware or computer software driving hardware actually, specific application and design constraint depending on technical solution.Professional technician can use different methods to achieve the described function each specific application, but this realization is it is not considered that exceed scope of the present application.

The embodiment of the present application can carry out the division of functional module according to above method example to first base station, the second base station or UE, such as, the each functional module of each function division can be corresponded to, two or more functions can also be integrated in a processing module.Above-mentioned integrated module both can take the form of hardware realization, can also be realized in the form of software function module.It should be noted that being schematically that only a kind of logical function partition, there may be another division manner in actual implementation to the division of module in the embodiment of the present application.

For example, Figure 10 shows a kind of possible structural schematic diagram of first base station 100 involved in above-described embodiment in the case where each function division of use correspondence each functional module.The first base station 100 includes receiving unit 1001, transmission unit 1002 and determination unit 1003.Wherein:

Receiving unit 1001 for receiving the first reference signal of UE transmission, and will be denoted as Tr1 the time of reception, and receive the Tr2 that the second base station is sent, at the time of Tr2 is that the second base station that the second base station measurement obtains receives the first reference signal；

Transmission unit 1002, for sending the second reference signal to UE.

Receiving unit 1001 is also used to, and receives the TdifUE that UE is sent, and TdifUE is difference at the time of receiving the third reference signal that the second base station is sent at the time of the UE that UE measurement obtains receives the second reference signal that first base station 100 is sent with UE.

Determination unit 1003, for determining at least one of timing offset Tdif and signal transmission time difference △ T of first base station 100 and the second base station according to Tr1, Tr2 and TdifUE；Wherein, △ T refers to, the difference of transmission time and signal transmission time UE and second base station between of the signal between UE and first base station 100.

Optionally, determination unit 1003 specifically can be used for: according to formula Tdif=(TdifUE+ (Tr1-Tr2))/2, obtain Tdif.

Optionally, determination unit 1003 specifically can be used for: according to formula △ T=(TdifUE- (Tr1-Tr2))/2, obtain △ T.

Optionally, transmission unit 1002 can be also used for: send the first configuration information to UE；First configuration information is used to indicate UE and sends the first reference signal at the first measurement moment.Optionally, the first configuration information can also include measurement period, be used to indicate UE since the first measurement moment every the measurement period of integral multiple, send first reference signal.

Optionally, transmission unit 1002 can be also used for: send the first configuration information to UE；First configuration information is used to indicate UE and sends the first reference signal at the first measurement moment；The second reference signal is sent to UE at the first measurement moment；And the second configuration information is sent to the second base station；Wherein, the second configuration information is used to indicate the second base station and sends third reference signal to UE at the second measurement moment；Second measurement moment was the sum of the timing adjustment amount of the first measurement moment base station opposite with the second base station.

Optionally, the first configuration information further includes measurement period, is used to indicate UE since the first measurement moment every the measurement period of integral multiple, sends first reference signal.In this case, transmission unit 1003 specifically can be used for, Start the measurement period every integral multiple at the first measurement moment, sends second reference signal to UE.Further include measurement period in second configuration information, is used to indicate the second base station since the second measurement moment every the measurement period of integral multiple, sends a third reference signal.

Wherein, all related contents for each step that above method embodiment is related to can quote the function description of corresponding function module, and details are not described herein.

In the embodiment of the present application, which is presented in the form of each functional module of each function division of correspondence, alternatively, the first base station is presented in the form of using the integrated each functional module of model split.Here unit " can refer to application-specific integrated circuit (application-specific integrated circuit; ASIC); circuit; execute the processor and memory of one or more softwares or firmware program; integrated logic circuit and/or other device of above-mentioned function can be provided.In a simple embodiment, those skilled in the art is contemplated that first base station 100 can use form shown in Fig. 3.For example, the determination unit 1003 in Figure 10 can realize that, specifically, determination unit 1003 can be executed by calling the application code stored in memory 22 by processor 21, the embodiment of the present application is not intended to be limited in any this by the processor 21 in Fig. 3.For another example, receiving unit 1001 and transmission unit 1002 can be realized by the communication interface 23 in Fig. 3.

For example, Figure 11 shows a kind of possible structural schematic diagram of the second base station 110 involved in above-described embodiment in the case where each function division of use correspondence each functional module.Second base station 110 includes receiving unit 1101 and transmission unit 1102.Wherein:

Receiving unit 1101 sends the first reference signal for receiving UE, and the time of reception will be denoted as Tr2.

Transmission unit 1102, for sending third reference signal to UE, the third reference signal determines TdifUE for UE；TdifUE is poor TdifUE at the time of receiving the third reference signal that the second base station 110 is sent at the time of the UE that UE measurement obtains receives the second reference signal that first base station is sent with UE, and sends TdifUE to first base station.

Transmission unit 1102 is also used to, and sends Tr2 to first base station, Tr2, according to Tr1, TdifUE and Tr2, determines at least one of timing offset TdifUE and signal transmission time difference △ T of first base station and the second base station 110 for first base station；Wherein, at the time of Tr1 is first base station the first reference signal of reception that first base station measurement obtains；△ T refers to, the difference of the transmission time of transmission time of the signal between UE and first base station and signal between UE and the second base station 110.

Optionally, receiving unit 1101 can be also used for: receive the second configuration information that first base station is sent；Wherein, the second configuration information included the second measurement moment；Second measurement moment was the sum of the timing adjustment amount of the first measurement moment first base station opposite with base station, at the time of the first measurement moment was that first base station sends the second reference signal to UE.In this case, transmission unit 1102 can be also used for, third reference signal is sent to UE at the second measurement moment.

In the embodiment of the present application, which is presented in the form of each functional module of each function division of correspondence, alternatively, second base station is presented in the form of using the integrated each functional module of model split.Here unit " can refer to ASIC, circuit, execute the processor and memory of one or more softwares or firmware program, integrated logic circuit and/or other device of above-mentioned function can be provided.In a simple embodiment, those skilled in the art is contemplated that the second base station 110 can use form shown in Fig. 3.For example, the transmission unit 1102 and receiving unit 1101 in Figure 11 can be realized by the communication interface 23 in Fig. 3.

For example, Figure 12 shows a kind of possible structural schematic diagram of UE120 involved in above-described embodiment in the case where each function division of use correspondence each functional module.The UE120 includes transmission unit 1201, receiving unit 1202 and determination unit 1203.Wherein:

Transmission unit 1201, for sending the first reference signal, first reference signal determines Tr1 for first base station, and Tr2 is determined for the second base station and sends Tr2 to first base station, wherein, at the time of Tr1 is that first base station receives the first reference signal, at the time of Tr2 is that the second base station receives the first reference signal.

Receiving unit 1202, for receiving the second reference signal of first base station transmission, and the third reference signal that the second base station of reception is sent.

Determination unit 1203, for determining TdifUE；TdifUE is difference at the time of receiving the third reference signal that the second base station is sent at the time of UE120 receives the second reference signal that first base station is sent with UE120.

Transmission unit 1201 is also used to, and sends TdifUE to first base station, the TdifUE, according to Tr1, Tr2 and TdifUE, determines at least one of timing offset and signal transmission time difference △ T of first base station and the second base station for first base station；Wherein, △ T refers to, the difference of transmission time and signal transmission time UE120 and second base station between of the signal between UE120 and first base station.

Optionally, receiving unit 1202 can be also used for: receive the first configuration information that first base station is sent；Wherein, the first configuration information included the first measurement moment, and the sum of timing adjustment amount of the first measurement moment first base station opposite with the second base station was the second measurement moment, at the time of the second measurement moment was that the second base station sends third reference signal to UE120.In this case, transmission unit 1202 specifically can be used for, the first reference signal is sent at the first measurement moment.

Optionally, receiving unit 1202 can be also used for: receive the first configuration information that first base station is sent, the first configuration information included the first measurement moment.In this case, transmission unit 1201 specifically can be used for: sending the first reference signal at the first measurement moment.

In the embodiment of the present application, which is presented in the form of each functional module of each function division of correspondence, alternatively, the UE is presented in the form of using the integrated each functional module of model split.Here unit " can refer to ASIC, circuit, execute the processor and memory of one or more softwares or firmware program, integrated logic circuit and/or other device of above-mentioned function can be provided.In a simple embodiment, those skilled in the art is contemplated that UE120 can use form shown in Fig. 4.For example, the determination unit 1203 in Figure 12 can realize that, specifically, determination unit 1203 can be executed by calling the application code stored in memory 32 by processor 31, the embodiment of the present application is not intended to be limited in any this by the processor 31 in Fig. 4.For another example, transmission unit 1201 and receiving unit 1202 can be realized by the transceiver 34 in Fig. 4.

In the above-described embodiments, it can be realized wholly or partly by software, hardware, firmware or any combination thereof.When being realized using software program, can entirely or partly realize in the form of a computer program product.The computer program product includes one or more computer instructions.When loading on computers and executing computer program instructions, entirely or partly generate according to process or function described in the embodiment of the present application.The computer can be general purpose computer, special purpose computer, computer network or other programmable devices.The computer instruction may be stored in a computer readable storage medium, or it is transmitted from a computer readable storage medium to another computer readable storage medium, such as, the computer instruction can pass through wired (such as coaxial cable, optical fiber, Digital Subscriber Line (digital subscriber line from a web-site, computer, server or data center DSL)) or wireless (such as infrared, wireless, microwave etc.) mode is transmitted to another web-site, computer, server or data center.The computer readable storage medium can be any usable medium that computer can access or include the data storage devices such as one or more server, data centers that can be integrated with medium.The usable medium can be magnetic medium (for example, floppy disk, hard disk, tape), optical medium (for example, DVD) or semiconductor medium (such as solid state hard disk (Solid State Disk, SSD)) etc..

Although the application is described in conjunction with each embodiment herein; however; during implementing the application claimed, those skilled in the art are by checking the attached drawing, disclosure and the appended claims, it will be appreciated that and realize other variations of the open embodiment.In the claims, " comprising " (comprising) word is not excluded for other components or step, and "a" or "an" is not excluded for multiple situations.Several functions of enumerating in claim may be implemented in single processor or other units.Mutually different has been recited in mutually different dependent certain measures, it is not intended that these measures, which cannot combine, generates good effect.

Although the application is described in conjunction with specific features and embodiment, it is clear that, in the case where not departing from spirit and scope, it can be carry out various modifications and is combined.Correspondingly, the specification and drawings are only the exemplary illustration for the application that appended claims are defined, and are considered as any and all modifications, variation, combination or the equivalent covered within the scope of the application.Obviously, those skilled in the art can carry out various modification and variations without departing from spirit and scope to the application.If then the application is also intended to include these modifications and variations in this way, these modifications and variations of the application belong within the scope of the claim of this application and its equivalent technologies.

Claims

A kind of method of time of measuring difference, which is characterized in that the described method includes:

First base station receives the first reference signal that user equipment (UE) is sent, and the time of reception will be denoted as Tr1；

The first base station receives the Tr2 that the second base station is sent, at the time of the Tr2 is that second base station that second base station measurement obtains receives first reference signal；

The first base station sends the second reference signal to the UE；

The first base station receives the TdifUE that the UE is sent, and the TdifUE is difference at the time of receiving the third reference signal that second base station is sent at the time of the UE that the UE measurement obtains receives second reference signal that the first base station is sent with the UE；

The first base station determines at least one of timing offset Tdif and signal transmission time difference △ T of the first base station and second base station according to the Tr1, the Tr2 and the TdifUE；Wherein, the △ T refers to, the difference of the transmission time of transmission time of the signal between the UE and the first base station and signal between the UE and second base station.
The method according to claim 1, wherein the first base station determines the timing offset Tdif of the first base station Yu second base station according to the Tr1, the Tr2 and the TdifUE, comprising:

The first base station obtains the Tdif according to formula Tdif=(TdifUE+ (Tr1-Tr2))/2.
Method according to claim 1 or 2, which is characterized in that the first base station determines signal transmission time difference △ T according to the Tr1, the Tr2 and the TdifUE, comprising:

The first base station obtains the △ T according to formula △ T=(TdifUE- (Tr1-Tr2))/2.
Method according to any one of claims 1 to 3, which is characterized in that the method also includes:

The first base station sends configuration information to the UE；The configuration information is used to indicate the UE and sends first reference signal at the measurement moment.
According to the method described in claim 4, it is characterized in that,

The configuration information further includes measurement period, is used to indicate the UE since the measurement moment every the measurement period of integral multiple, sends first reference signal.
A kind of method of time of measuring difference, which is characterized in that the described method includes:

Second base station receives user equipment (UE) and sends the first reference signal, and the time of reception will be denoted as Tr2；

Second base station sends third reference signal to the UE, the third reference signal is used for the UE and determines that TdifUE, the TdifUE are difference at the time of receiving the third reference signal of the second base station transmission at the time of the UE that the UE measurement obtains receives the second reference signal that first base station is sent with the UE；

Second base station sends the Tr2 to the first base station, the Tr2 is for the first base station according to Tr1, the TdifUE and the Tr2, determine at least one of timing offset Tdif and signal transmission time difference the △ T of the first base station and second base station；Wherein, at the time of the Tr1 is that the first base station that the first base station measurement obtains receives first reference signal, the △ T refers to, the difference of the transmission time of transmission time of the signal between the UE and the first base station and signal between the UE and second base station.
A kind of method of time of measuring difference, which is characterized in that the described method includes:

User equipment (UE) sends the first reference signal, first reference signal determines Tr1 for first base station, and Tr2 is determined for the second base station, wherein, at the time of the Tr1 is that the first base station receives first reference signal, at the time of the Tr2 is that second base station receives first reference signal；

The UE receives the second reference signal that the first base station is sent；

The UE receives the third reference signal that second base station is sent；

The UE determines TdifUE；The TdifUE is difference at the time of receiving the third reference signal that second base station is sent at the time of the UE receives the second reference signal that the first base station is sent with the UE；

The UE sends the TdifUE to the first base station, the TdifUE is for the first base station according to the Tr1, the Tr2 and the TdifUE, determine at least one of timing offset Tdif and signal transmission time difference the △ T of the first base station and second base station；Wherein, the △ T refers to, the difference of the transmission time of transmission time of the signal between the UE and the first base station and signal between the UE and second base station.
The method according to the description of claim 7 is characterized in that the method also includes:

The UE receives the configuration information that the first base station is sent, and the configuration information includes the measurement moment；

The UE sends the first reference signal, comprising:

The UE sends the first reference signal at the measurement moment.
According to the method described in claim 8, it is characterized in that, the configuration information further includes measurement period；The UE sends the first reference signal at the measurement moment, comprising:

The UE, every the measurement period of integral multiple, sends first reference signal since the measurement moment.
A kind of base station, which is characterized in that the base station includes:

Receiving unit, for receiving the first reference signal of user equipment (UE) transmission, and Tr1 will be denoted as the time of reception, and receive the Tr2 that the second base station is sent, at the time of the Tr2 is that second base station that second base station measurement obtains receives first reference signal；

Transmission unit, for sending the second reference signal to the UE；

The receiving unit is also used to, the TdifUE that the UE is sent is received, the TdifUE is difference at the time of receiving the third reference signal that second base station is sent at the time of the UE that the UE measurement obtains receives second reference signal that the base station is sent with the UE；

Determination unit, for determining at least one of timing offset Tdif and signal transmission time difference △ T of the base station and second base station according to the Tr1, the Tr2 and the TdifUE；Wherein, the △ T refers to, the difference of the transmission time of transmission time of the signal between the UE and the base station and signal between the UE and second base station.
Base station according to claim 10, which is characterized in that the determination unit is specifically used for: according to formula Tdif=(TdifUE+ (Tr1-Tr2))/2, the Tdif is obtained.
Base station described in 0 or 11 according to claim 1, which is characterized in that the determination unit is specifically used for: according to formula △ T=(TdifUE- (Tr1-Tr2))/2, the △ T is obtained.
0 to 12 described in any item base stations according to claim 1, which is characterized in that

The transmission unit is also used to: Xiang Suoshu UE sends configuration information；The configuration information is used to indicate the UE and sends first reference signal at the measurement moment.
Base station according to claim 13, which is characterized in that

The configuration information further includes measurement period, is used to indicate the UE since the measurement moment every the measurement period of integral multiple, sends first reference signal.
A kind of base station, which is characterized in that the base station includes:

Receiving unit sends the first reference signal for receiving user equipment (UE), and the time of reception will be denoted as Tr2；

Transmission unit, for sending third reference signal to the UE, the third reference signal determines TdifUE for the UE, the TdifUE is poor TdifUE at the time of receiving the third reference signal that the base station is sent at the time of the UE that the UE measurement obtains receives the second reference signal that first base station is sent with the UE, and sends the TdifUE to the first base station；

The transmission unit is also used to, the Tr2 is sent to the first base station, the Tr2, according to Tr1, the TdifUE and the Tr2, determines at least one of timing offset TdifUE and signal transmission time difference △ T of the first base station and the base station for the first base station；Wherein, at the time of the Tr1 is that the first base station that the first base station measurement obtains receives first reference signal, the △ T refers to, the difference of transmission time and signal transmission time the UE and the base station between of the signal between the UE and the first base station.
A kind of user equipment (UE), which is characterized in that the UE includes:

Transmission unit, for sending the first reference signal, first reference signal determines Tr1 for first base station, and Tr2 is determined for the second base station, wherein, at the time of the Tr1 is that the first base station receives first reference signal, at the time of the Tr2 is that second base station receives first reference signal；

Receiving unit, the second reference signal sent for receiving the first base station, and receive the third reference signal that second base station is sent；

Determination unit, for determining TdifUE；The TdifUE is difference at the time of receiving the third reference signal that second base station is sent at the time of the UE receives the second reference signal that the first base station is sent with the UE；

The transmission unit is also used to, the TdifUE is sent to the first base station, the TdifUE is for the first base station according to the Tr1, the Tr2 and the TdifUE, determine at least one of timing offset and the signal transmission time difference △ T of the first base station and second base station；Wherein, the △ T refers to, the difference of the transmission time of transmission time of the signal between the UE and the first base station and signal between the UE and second base station.
UE according to claim 16, which is characterized in that

The receiving unit is also used to, and the configuration information sent for receiving the first base station, the configuration information includes the measurement moment；

The transmission unit is specifically used for, and sends the first reference signal at the measurement moment.
UE according to claim 17, which is characterized in that

The transmission unit is specifically used for, and every the measurement period of integral multiple since the measurement moment, sends first reference signal.
A kind of device of time of measuring difference characterized by comprising memory, processor, system bus and communication interface；Wherein, the memory, the processor and the communication interface are connected by the system bus；The memory is for storing program instruction；The processor is for calling described program to instruct, the method to execute time of measuring difference as described in any one of claim 1 to 9.