CN108271274A - A kind of information synchronization method and device - Google Patents
A kind of information synchronization method and device Download PDFInfo
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- CN108271274A CN108271274A CN201710003574.8A CN201710003574A CN108271274A CN 108271274 A CN108271274 A CN 108271274A CN 201710003574 A CN201710003574 A CN 201710003574A CN 108271274 A CN108271274 A CN 108271274A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0833—Random access procedures, e.g. with 4-step access
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
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Abstract
The embodiment of the invention discloses a kind of information synchronization methods, send the first instruction information to terminal, the first instruction information indicates that the terminal sends the first Physical Random Access Channel PRACH information in first time；The first PRACH information that the terminal is sent is received, obtains the second time for receiving the first PRACH information；According to the first time and the second time, first time lead TA is determined；The first TA is sent to the terminal, so that the terminal sends business information according to the first TA；The movement speed of the terminal is obtained, twoth TA corresponding with the movement speed is determined according to the movement speed.The embodiment of the present invention also discloses a kind of synchronizing information device simultaneously.
Description
Technical field
The present invention relates to field of information communication more particularly to a kind of information synchronization methods and device.
Background technology
With the development of communication field, based on cellular narrowband Internet of Things (NB-IoT, Narrow Band Internet
Of Things) system become a weight of all things on earth internet with the advantages such as its low-power consumption, wide covering, low cost, large capacity
Want branch.In NB-IoT systems, in order to which base station can correctly solve the data of terminal transmission, terminal and base station is needed to keep
Row synchronizes, it is ensured that the signal of terminal can be accurately fallen into the receiving time window of base station, that is, in the range of cyclic prefix.For
The signal of terminal can be accurately fallen into the cyclic prefix of base station, and terminal needs the progress time adjustment before emit signal, according to
The time point of base station emits, this time adjusted value, that is, Timing Advance (TA, Time Advance).Base station is by adjusting every
The TA values of a terminal, can control the uplink signal that different terminals are sent to reach the time of base station, and the terminal more remote from base station passes
Defeated time delay is also bigger, it is necessary to send upstream data in advance than the terminal near from base station, therefore TA values are also bigger.Simultaneously as eventually
End is often in movement, therefore the time that uplink signal reaches base station also can constantly change, to ensure that terminal signaling can be accurate
Fall into the receiving time window of base station, therefore base station need constantly adjustment TA values shift to an earlier date transmission data to reach uplink synchronous.
NB-IoT supports three kinds of transmitting uplink data modes, subcarrier spacing (Single-Tone) 3.75KHz, Single-
Tone 15KHz and multi-subcarrier interval (Multi-Tone) 15KHz.Wherein Single-Tone refers to tone signal, i.e.,
List carrier mode, Multi-Tone refer to multi-tone signal, i.e. multi-subcarrier pattern.The appearance of list carrier mode be in order to
Covering power is improved, power is focused on a frequency point and is emitted, improves signal-to-noise ratio (SINR, Signal to
Interference plus Noise Ratio), coverage area bigger.
In the case of the resources such as multi-subcarrier are more, there are two types of currently used TA methods of adjustment, and one kind is that base station exists
Estimate TA values by measuring the Preamble lead code of channel (access) received in random access procedure, another kind be
Business keep during, by measurement detect normality respond reference mark (SRS, Sounding Reference Signal) or
Person measures the upstream data Physical Uplink Shared Channel (PUSCH, Physical Uplink Shared Channel) received and obtains
To TA values.Common TA evaluation methods have frequency domain estimation algorithm and time domain estimation algorithm, and frequency domain estimation algorithm has frequency domain phase difference to estimate
Meter method, common time domain evaluation method have：Sinc function Sinc (Sinc function) function interpolation, discrete fourier become
Change (DFT, Discrete Fourier Transform) interpolation method, gravity model appoach, DFT interpolation+gravity model appoach.And for list carrier wave
Situation, since efficient resource is few, estimates the TA of base station and face that TA estimations are difficult and estimation TA inaccuracy two is big difficult, so as to
Cause to be difficult to keep uplink synchronous.
Invention content
To solve existing technical problem, the embodiment of the present invention provides a kind of information synchronization method and device, base station
Upstream time lead is determined according to the situation of movement of terminal, it is ensured that the Timing Advance of mobile terminal it is accurate, improve
The accuracy of base station and end message interaction under list carrier mode.
The technical proposal of the invention is realized in this way：
The embodiment of the present invention provides a kind of information synchronization method, the method includes：
The first instruction information is sent to terminal, the first instruction information indicates that the terminal sends first in first time
Physical Random Access Channel PRACH information；
The first PRACH information that the terminal is sent is received, when obtaining the second of reception the first PRACH information
Between；
According to the first time and the second time, first time lead TA is determined；
The first TA is sent to the terminal, so that the terminal sends business information according to the first TA；
The movement speed of the terminal is obtained, corresponding with the movement speed second is determined according to the movement speed
TA。
Further, it is described that twoth TA corresponding with the movement speed is determined according to the movement speed, including：
When the movement speed is equal to 0, the 2nd TA is the first TA；
When the movement speed is not equal to 0, according to pre-stored movement speed and correspondence dispatching cycle, institute is determined
Movement speed corresponding dispatching cycle is stated, indicates that the terminal sends second corresponding dispatching cycle according to the movement speed
PRACH information determines the 2nd TA according to the 2nd PRACH information.
Further, it is described to indicate that the terminal sends the 2nd PRACH corresponding dispatching cycle according to the movement speed
Information determines the 2nd TA according to the 2nd PRACH information, including：
According to the movement speed corresponding dispatching cycle, the second instruction information is sent, the second instruction information is used for
Indicate that the terminal sends the 2nd PRACH information in the third time；
The 2nd PRACH information that the terminal is sent is received, when obtaining the 4th of reception the 2nd PRACH information
Between, the 2nd TA is determined according to the third time and the 4th time.
Further, the movement speed that the basis is pre-stored and correspondence dispatching cycle, determine the movement speed
Corresponding dispatching cycle, including：
The corresponding movement of the movement speed is searched in the pre-stored movement speed and dispatching cycle correspondence
Velocity interval determines the movement speed range corresponding dispatching cycle for the movement speed corresponding dispatching cycle.
Further, the method further includes：
When the movement speed is equal to 0, setting schedule flag is 0；
When the movement speed is not equal to 0, setting schedule flag is 1.
Further, the method further includes：
When the uplink quality for monitoring the terminal meets preset condition, transmission third instruction information to the terminal,
The third instruction information indicates that the terminal sends the 3rd PRACH information in the 5th time.
Further, the movement speed for obtaining the terminal, including：
The status information that the terminal is sent is received, the status information carries the movement speed of the terminal；
Alternatively, measuring the motion state of the terminal, the movement speed of the terminal is obtained.
The embodiment of the present invention provides a kind of information synchronization method, the method includes：
The first instruction information is received, the first instruction information is used to indicate terminal and sends the first PRACH in first time
Information；
The first PRACH information is sent to base station；
The first TA that the base station is sent is received, business information is sent according to the first TA.
Further, when detecting the base station uplink loss, the 4th PRACH information is sent to the base station.
Further, in the first TA for receiving the base station and sending, according to the first TA send business information it
Afterwards, including：
The second instruction information that the base station is sent is received, the second instruction information instruction sends second in the third time
PRACH information；
The 2nd PRACH information is sent to the base station.
The embodiment of the present invention provides a kind of synchronizing information device, and described device includes：First receiving module, acquisition module,
Determining module, the first sending module；Wherein,
First sending module, for sending the first instruction information to terminal, described first indicates described in information instruction
Terminal sends the first Physical Random Access Channel PRACH information in first time；
First receiving module, for receiving the first PRACH information that the terminal is sent；
The acquisition module, for obtaining the second time for receiving the first PRACH information；
The determining module, for according to the first time and the second time, determining first time lead TA；
First sending module, for sending the first TA to the terminal, so that the terminal is according to
First TA sends business information；
The acquisition module is additionally operable to obtain the movement speed of the terminal；
The determining module is additionally operable to determine twoth TA corresponding with the movement speed according to the movement speed.
Further, when the movement speed is equal to 0, the 2nd TA is the first TA；
The determining module, for when the movement speed is not equal to 0, according to pre-stored movement speed and dispatching week
Phase correspondence determines the movement speed corresponding dispatching cycle；
First sending module, for corresponding dispatching cycle indicating that the terminal sends the according to the movement speed
Two PRACH information；
The determining module, for determining the 2nd TA according to the 2nd PRACH information.
Further, first sending module, for according to the movement speed corresponding dispatching cycle, sending second
Indicate information, the second instruction information is used to indicate the terminal and sends the 2nd PRACH information in the third time；
First receiving module, for receiving the 2nd PRACH information that the terminal is sent；
The acquisition module, for obtaining the 4th time for receiving the 2nd PRACH information；
The determining module, for determining the 2nd TA according to the third time and the 4th time.
Further, the determining module, in the pre-stored movement speed and dispatching cycle correspondence
The corresponding movement speed range of the movement speed is searched, determines that the movement speed range corresponding dispatching cycle is institute
State movement speed corresponding dispatching cycle.
Further, described device further includes：Setup module,
The setup module, for when the movement speed is equal to 0, setting schedule flag to be 0；It is additionally operable to when the shifting
When dynamic speed is not equal to 0, setting schedule flag is 1.
Further, first sending module, for meeting preset condition when the uplink quality for monitoring the terminal
When, it sends third and indicates information to the terminal, the third instruction information indicates that the terminal sends third in the 5th time
PRACH information.
Further, first receiving module, for receiving the status information that the terminal is sent, the status information
Carry the movement speed of the terminal；
Alternatively, the acquisition module, for measuring the motion state of the terminal, obtains the movement speed of the terminal.
The embodiment of the present invention provides a kind of synchronizing information device, and described device includes：Second receiving module, second send mould
Block,
Second receiving module, for receiving the first instruction information, the first instruction information is used to indicate terminal and exists
The first PRACH information is sent at the first time；
Second sending module, for sending the first PRACH information to base station；
For receiving the first TA that the base station is sent, business is sent according to the first TA for second receiving module
Information.
Further, second sending module, for when detecting the base station uplink loss, sending the 4th
PRACH information is to the base station.
Further, second receiving module, for receiving the second instruction information that the base station is sent, described second
Indicate that information instruction sends the 2nd PRACH information in the third time；
Second sending module, for sending the 2nd PRACH information to the base station.
The embodiment of the present invention provides a kind of information synchronization method and device, and base station instruction terminal sends PRACH information, passes through
Record instruction terminal sends the time of PRACH information and receives the PRACH information times of terminal transmission, determines the uplink of terminal
Timing Advance.Simultaneously according to the situation of movement of terminal, issue instruction of the base station to mobile terminal period, instruction terminal transmission
PRACH information determines new upstream time lead, to ensure the accurate of the Timing Advance of mobile terminal, has ensured list
The accuracy of base station and end message interaction under subcarrier pattern.
Description of the drawings
Fig. 1 is information synchronization method flow diagram one provided in an embodiment of the present invention；
Fig. 2 is Timing Advance acquisition methods schematic diagram provided in an embodiment of the present invention；
Fig. 3 is information synchronization method flow diagram two provided in an embodiment of the present invention；
Fig. 4 is information synchronization method information flow chart provided in an embodiment of the present invention；
Fig. 5 is synchronizing information apparatus structure schematic diagram one provided in an embodiment of the present invention；
Fig. 6 is synchronizing information apparatus structure schematic diagram two provided in an embodiment of the present invention；
Fig. 7 is synchronizing information apparatus structure schematic diagram three provided in an embodiment of the present invention.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes.
Embodiment one
The embodiment of the present invention provides a kind of information synchronization method, as shown in Figure 1, this method includes：
It should be noted that the executive agent of information synchronization method provided in an embodiment of the present invention is synchronizing information device,
Synchronizing information device is specifically as follows base station.Base station and terminal will carry out information exchange, wherein, it is that net is in network that terminal, which refers to,
The equipment of network outermost is mainly used for the input of user information and the output of handling result etc., and the terminal in the present embodiment can
Think the equipment such as mobile phone, computer.
As shown in Fig. 2, the first row represents Base Transmitter sequential in figure, it is made of subframe 0, subframe 1, subframe 2, subframe 3, often
The launch time base station of a subframe is understood；Terminal has corresponding reception sequential after terminal is synchronous with base station completion, in figure
Shown in second row, the reception sequential of terminal also includes subframe 0, subframe 1, subframe 2, subframe 3 corresponding to Base Transmitter sequential.Cause
The factors such as environment influence, and terminal can generate downlink transfer delay, τ when with base station synchronization.Base station sends the first instruction information instruction
Terminal sends the first PRACH (Physical Random Access Channel) information when third subframe starts, wherein,
PRACH information is the first Physical Random Access Channel information.
Step 102 receives the first PRACH information that the terminal is sent, and obtains and receives the first PRACH information
The second time.
Specifically, as shown in Fig. 2, after the first instruction information of terminal response base station, base station receives terminal transmission
First PRACH information, fourth line represents that the time that record receives the first PRACH information was the second time in figure.
Step 103, according to the first time and the second time, determine first time lead TA.
Specifically, as shown in Fig. 2, base station sends the first instruction information to terminal instruction terminal in third subframe start time
The time of the first PRACH information is sent as at the first time, the second time received the first PRACH information of terminal transmission for base station
Time, there are uplink delay, τs when terminal is sent to base station.So terminal need to shift to an earlier date 2 τ when sending message to base station
Reach terminal and the time synchronization of base station.It is the first time lead that terminal sends information from first time to the second time
TA。
Step 104 sends the first TA to the terminal, so that the terminal sends business according to the first TA
Information.
Specifically, the first TA is handed down to terminal by base station, terminal adjusts the time for sending business information according to the first TA.It is logical
Cross time adjustment, it is ensured that the signal of terminal can be accurately fallen into the range of the cyclic prefix of base station.
Step 105 receives the status information that the terminal is sent, and the status information carries the mobile speed of the terminal
Degree；Alternatively, measuring the motion state of the terminal, the movement speed of the terminal is obtained.
Specifically, the state due to terminal is likely to be in stationary state, it is also possible in mobile state.Terminal is moved
The size of dynamic speed is reported to base station or base station and is carried out by the means that wireless signal detects after being tested the speed by terminal oneself
Detection.Wherein, when loading GPS, gyroscope in terminal when having the device of speed measuring function, the shifting of oneself can be detected by terminal
Dynamic speed, is reported to base station.When terminal does not have speed measuring function or do not report movement speed, can initiate to detect by base station.
The method of two kinds of measuring terminals movement speeds can use parallel.When terminal is in mobile status, it is necessary to change TA to ensure end
Hold uplink synchronous.When moving velocity of terminal is equal to 0, step 106 is performed；When moving velocity of terminal is not equal to 0, step is performed
107。
Step 106, when the movement speed be equal to 0 when, the 2nd TA be the first TA.
Specifically, when the movement speed of terminal is 0, i.e., when terminal remains static, the distance of terminal to base station does not have
It changes, so terminal keeps can reach uplink synchronous using the first TA transmission datas.
Step 107, when the movement speed be not equal to 0 when, according to pre-stored movement speed it is corresponding with dispatching cycle pass
System determines the movement speed corresponding dispatching cycle, and the terminal is indicated corresponding dispatching cycle according to the movement speed
The 2nd PRACH information is sent, the 2nd TA is determined according to the 2nd PRACH information.
Wherein, according to pre-stored movement speed and correspondence dispatching cycle, the corresponding tune of the movement speed is determined
Spending the period can specifically include：It is corresponding that the movement speed is searched in pre-stored movement speed and dispatching cycle correspondence
Movement speed range, it is the corresponding scheduling of the movement speed to determine the movement speed range corresponding dispatching cycle
Period.
Specifically, the week of moving velocity of terminal and dispatch terminal transmission PRACH information is pre-stored in synchronizing information device
The correspondence of phase.By the movement speed for obtaining terminal, you can determine the dispatching cycle of base station.
Illustratively, when the movement speed of terminal is 0 to 60km/h, the dispatching cycle of base station is 1280ms；Work as terminal
Movement speed when being more than 60km/h, the dispatching cycle of base station is 320ms.It should be noted that the end provided in the present embodiment
The section and its corresponding period for holding movement speed can on demand be set according to environmental factor, specification of equipment etc., and the present embodiment is not
Its speed interval is divided and period size is defined.Wherein, the dispatching cycle of the higher base station of the movement speed of terminal is shorter,
The movement speed of terminal is divided into different sections, each section corresponds to the dispatching cycle of a base station.
Further, it is described to indicate that the terminal is sent in the third time corresponding dispatching cycle according to the movement speed
2nd PRACH information determines that the 2nd TA can specifically include according to the 2nd PRACH information：
According to the movement speed corresponding dispatching cycle, the second instruction information is sent, the second instruction information is used for
Indicate that the terminal sends the 2nd PRACH information in the third time；The 2nd PRACH information that the terminal is sent is received, is obtained
The 4th time of the 2nd PRACH information is received, the 2nd TA is determined according to the third time and the 4th time.
Specifically, according to movement speed corresponding dispatching cycle, base station periodically issues scheduling information instruction terminal and exists
The third time sends the 2nd PRACH information, and the time that base station receives the 2nd PRACH information of terminal transmission was the 4th time,
The difference of 4th time and third time are the 2nd TA.
Further, when the uplink quality for monitoring the terminal meets preset condition, third instruction information is sent extremely
The terminal, determines the time of the transmission third instruction information, and the third instruction information indicates the terminal at the 5th
Between send the 3rd PRACH information.
Specifically, above-mentioned preset condition refers to the ropy preset condition of terminal uplink.The uplink quality of terminal can root
According to Block Error Rate (BLER, Block Error Rate), bit error rate (BER, Bit Error Rate), signal-to-noise ratio (SIR,
Signal to Interference Ratio) etc. information determine, when obtaining Block Error Rate less than 0.1%, signal-to-noise ratio is less than-
3db is when information, it can be determined that terminal uplink is of poor quality, the ropy condition of uplink be communication common knowledge, the present embodiment
Only for example, not being defined to its uplink quality of requirements.The preset condition that uplink quality meets is pre-stored in information
In synchronizing device.When the uplink for monitoring terminal is of poor quality, base station is not limited by periodicity sending instruction, sends the immediately
Three instruction information to terminal, instruction terminal sends PRACH information, corrects the TA times.Correction time acquisition process and above-mentioned acquisition
The process of first TA times is identical, repeats no more.After correcting TA, continue to be determined to issue instruction information according to the movement speed of terminal
Period, instruction information instruction terminal sends PRACH information.
Further, base station carries out periodic scheduling terminal transmission after the movement speed for obtaining terminal according to speed
The method of PRACH information corrections TA can also include：
When the movement speed is equal to 0, setting schedule flag is 0；When the movement speed is not equal to 0, setting is adjusted
Scale will is 1.
Specifically, when the movement speed of terminal is equal to 0, i.e., terminal remains static, and setting scheduling identification is 0,
In, scheduling identification is located in the scheduler program of synchronizing information device.When scheduling identification is 0, periodical tune is not carried out to terminal
Degree, terminal are continuing with current TA.
When the movement speed of terminal is not equal to 0, i.e. terminal be in mobile status, and setting scheduling identification is 1, to terminal into
Row periodic scheduling, and kept for the period obtained for the first time in the process, until when base station detects that terminal uplink is of poor quality,
Instruction terminal sends PRACH information, according to new moving velocity of terminal, determines corresponding dispatching cycle.
Illustratively, the movement speed for the terminal being pre-stored in synchronizing information device and the relationship of the dispatching cycle of base station
For：When the movement speed of terminal is to be less than or equal to 30km/h more than 0, the dispatching cycle of base station is 2000ms；When the shifting of terminal
Dynamic speed is when being less than or equal to 60km/h more than 30km/h, and the dispatching cycle of base station is 1000ms；When the movement speed of terminal is
When being less than or equal to 100km/h more than 60km/h, the dispatching cycle of base station is 300ms.
Base station obtains the first movement speed of terminal for the first time, and the first movement speed for obtaining terminal is 20km/h, then sets
It is 1 to put scheduling identification, and 2000ms, sent a PRACH information per 2000ms instruction terminals and TA was corrected dispatching cycle,
And no longer obtain the movement speed of terminal.Until base station detects that the uplink quality of terminal meets in preset condition or terminal detection
During row step-out, the second movement speed of terminal is obtained, the second movement speed of terminal is 50km/h, and change is dispatching cycle
1000ms sends a PRACH information per 1000ms instruction terminals and TA is corrected, and no longer obtain the mobile speed of terminal
Degree；Until base station detects that the uplink quality of terminal meets preset condition or terminal detection uplink loss, terminal is obtained again
Movement speed is corrected the period.When reaching minimum value the dispatching cycle of base station, dispatching cycle will not become again
Change, kept for minimum dispatching cycle, is i.e. 300ms sends dispatch command to terminal.
The information synchronization method that the embodiment of the present invention provides, base station send PRACH information by instruction terminal, and record refers to
Show that terminal sends the time of PRACH information and receives the PRACH information times of terminal transmission, determine that the upstream time of terminal carries
Preceding amount, while according to the situation of movement of terminal, issue instruction of the base station to mobile terminal period, instruction terminal transmission PRACH
Information determines new upstream time lead, to ensure the accurate of the Timing Advance of mobile terminal, has ensured list carrier wave
The accuracy of base station and end message interaction under pattern.
Embodiment two
The embodiment of the present invention provides a kind of information synchronization method, as shown in figure 3, this method includes：
Step 201 receives the first instruction information, and the first instruction information is used to indicate terminal and sends the in first time
One PRACH information.
It should be noted that the executive agent of information synchronization method provided in an embodiment of the present invention is synchronizing information device,
Synchronizing information device is specifically as follows terminal.Base station and terminal carry out information exchange, wherein, it is that network is in network that terminal, which refers to,
The equipment of outermost is mainly used for the input of user information and the output of handling result etc., and the terminal in the present embodiment can be with
For equipment such as mobile phone, computers.
After terminal-pair base station carries out downlink locking, the first instruction information of base station is received, the first instruction information is used for
Instruction terminal sends the first PRACH information in first time.
Step 202 sends the first PRACH information to base station.
Step 203 receives the first TA that the base station is sent, and business information is sent according to the first TA.
Specifically, terminal receives the first TA that base station is sent, sent in the Traffic Channel of list carrier mode to base station
Business information performs multiple business.According to the first TA values, adjustment sends time during business information.
Optionally, when the movement speed of terminal is not 0, step 204 is performed.
Step 204 receives the second instruction information that the base station is sent, and the second instruction information instruction is in the third time
Send the 2nd PRACH information；The 2nd PRACH information is sent to the base station.
Specifically, when terminal receives the second instruction information of base station transmission, when instruction sends the 2nd PRACH information, eventually
It holds to base station and sends the 2nd PRACH information, before the new TA that base station issues is received, be continuing with the first TA to sending information
It is corrected.
Further, when detecting the base station uplink loss, the 4th PRACH information is sent to the base station.
Specifically, in terminal and base station during service interaction, once terminal detects base station uplink loss, stand
The 4th PRACH information is sent to base station, request base station is adjusted TA, to ensure communication quality.
The information synchronization method that the embodiment of the present invention provides, the life of transmission PRACH information issued by receiving base station
It enables, sends PRACH information, obtain the Timing Advance that base station is sent, time adjustment is carried out to the business information of transmission to reach
Uplink synchronous.Terminal reports mobile message, with assistant base station to movement in the case where having the ability of testing the speed to base station simultaneously
The Timing Advance of terminal is periodically adjusted.It ensure that terminal and base station information transmit accurate under list carrier mode
Degree.
Embodiment three
The embodiment of the present invention provides a kind of information synchronization method, flow charts of the Fig. 4 for the information synchronization method, this method stream
Journey is as follows：
Step 301, terminal receive the first instruction information.
Specifically, after terminal sends out the request of request connecting communication to base station, base station receives request, to terminal transmission the
One instruction information, the first instruction information instruction terminal send the first PRACH information in first time.Terminal receives the first instruction letter
Breath.
Step 302, terminal send the first PRACH information to base station.
Specifically, after terminal receives the first instruction information, first is sent in first time by the first instruction information
PRACH information is to base station.Base station receives the first PRACH information that terminal is sent, and obtains and receives the of the first PRACH information
Two times.
Step 303, base station determine first time lead TA according to first time and the second time.
Specifically, the first instruction information instruction terminal sends the first PRACH information in first time, from the second time to the
One time was that base station sends message delay times to terminal, this delay time is first time lead TA.
Step 304, base station send the first TA to the terminal, so that the terminal is sent according to the first TA
Business information.
Step 305, terminal receive the first TA that the base station is sent, and business information is sent according to the first TA.
Specifically, terminal receives the first TA that the base station is sent, business information is sent according to the first TA.When passing through
Between adjust, it is ensured that the signal of terminal can be accurately fallen into the range of the cyclic prefix of base station.
Step 306, base station receive the status information that the terminal is sent, and the status information carries the movement of the terminal
Speed；Alternatively, the motion state of terminal described in base station measurement, the movement speed of the terminal is obtained.
Specifically, the state due to terminal is likely to be in stationary state, it is also possible in mobile state.Terminal is moved
The size of dynamic speed is reported to base station or base station and is carried out by the means that wireless signal detects after being tested the speed by terminal oneself
Detection.Wherein, when loading GPS, gyroscope in terminal when having the device of speed measuring function, the shifting of oneself can be detected by terminal
Dynamic speed, is reported to base station.When terminal does not have speed measuring function or do not report movement speed, can initiate to detect by base station.
The method of two kinds of measuring terminals movement speeds can use parallel.When terminal is in mobile status, it is necessary to change TA to ensure end
Hold uplink synchronous.When moving velocity of terminal is equal to 0, i.e., when terminal remains static, the distance of terminal to base station is not sent out
It is raw to change, so terminal keeps can reach uplink synchronous using the first TA transmission datas；When moving velocity of terminal is not equal to 0
When, perform step 307.
Step 307, base station send the second instruction information according to the movement speed corresponding dispatching cycle, and described second
Instruction information is used to indicate the terminal and sends the 2nd PRACH information in the third time.
Specifically, the correspondence in the period of moving velocity of terminal and dispatch terminal transmission PRACH information is pre-stored in base station
Relationship.By the movement speed for obtaining terminal, you can determine the dispatching cycle of base station.Wherein, according to pre-stored movement speed
With correspondence dispatching cycle, the movement speed corresponding dispatching cycle is determined.Can specifically it include：In pre-stored movement
The corresponding movement speed range of the movement speed is searched in speed and dispatching cycle correspondence, determines the movement speed model
It is the movement speed corresponding dispatching cycle to enclose the corresponding dispatching cycle.Wherein, the second instruction information is used to refer to
Show that the terminal sends the 2nd PRACH information in the third time.
Step 308, terminal send the 2nd PRACH information to the base station.
Step 309, base station receive the 2nd PRACH information that the terminal is sent, and obtain and receive the 2nd PRACH information
The 4th time, the 2nd TA is determined according to the third time and the 4th time.
Specifically, the second instruction information instruction terminal sends the 2nd PRACH information in the third time, base station receives terminal
The time of the 2nd PRACH information sent, it was the 2nd TA that the 4th time, which subtracted the third time, for the 4th time.
Step 310, base station send the 2nd TA to the terminal, so that the terminal is sent according to the first TA
Business information.
Step 311, terminal receive the 2nd TA that the base station is sent, and business information is sent according to the 2nd TA.
It should be noted that base station can periodically be indicated according to the moving velocity of terminal obtained corresponding dispatching cycle
Terminal sends PRACH information correction Timing Advances, i.e., can periodically perform step 306 to step 311 to complete for moving
The Timing Advance of dynamic terminal determines.
Particularly, it in step 301 to step 311 implementation procedure, is preset if base station monitors meet to terminal uplink quality
During condition, it is immediately performed step 312；If terminal monitoring is immediately performed step 313 to base station uplink loss.
Step 312, when the uplink quality of base station monitors to the terminal meets preset condition, send third instruction information
To the terminal, the third instruction information indicates that the terminal sends the 3rd PRACH information in the 5th time.
Specifically, above-mentioned preset condition refers to the ropy preset condition of terminal uplink.The uplink quality of terminal can root
According to Block Error Rate (BLER, Block Error Rate), bit error rate (BER, Bit Error Rate), signal-to-noise ratio (SIR,
Signal to Interference Ratio) etc. information determine that be pre-stored in information same for the preset condition that uplink quality meets
It walks in device.When the uplink of base station monitors to terminal is of poor quality, base station is not limited by periodicity sending instruction, is sent immediately
Third indicates information to terminal, and instruction terminal sends PRACH information in the 5th time, corrects the TA times.Correction time obtained
Journey is identical with the process for obtaining for the first TA times in step 301 to step 305, repeats no more.After correcting TA, continue according to terminal
Movement speed determine to issue period of instruction information, instruction information instruction terminal sends PRACH information.
Step 313, when terminal detects the base station uplink loss, send the 4th PRACH information to the base station.
Specifically, in terminal and base station during service interaction, once terminal detects base station uplink loss, stand
The 4th PRACH information is sent to base station, request base station is adjusted TA, to ensure communication quality.
For step 312 and step 313, before not obtaining new TA in terminal, obtained before terminal still use
Newest TA on PUSCH channels transmitting business information.
The information synchronization method that the embodiment of the present invention provides, base station instruction terminal send PRACH information, are referred to by record
Show that terminal sends the time of PRACH information and receives the PRACH information times of terminal transmission, determine that the upstream time of terminal carries
Preceding amount.Simultaneously according to the situation of movement of terminal, issue instruction of the base station to mobile terminal period, instruction terminal transmission PRACH
Information determines new upstream time lead, to ensure the accurate of the Timing Advance of mobile terminal, has ensured list carrier wave
The accuracy of base station and end message interaction under pattern.
Example IV
An embodiment of the present invention provides a kind of synchronizing information device 1, as shown in figure 5, described device includes：First receives mould
Block 10, acquisition module 11, determining module 12, the first sending module 13；Wherein,
First sending module 13, for sending the first instruction information to terminal, the first instruction information instruction institute
It states terminal and sends the first Physical Random Access Channel PRACH information in first time；
First receiving module 10, for receiving the first PRACH information that the terminal is sent；
The acquisition module 11, for obtaining the second time for receiving the first PRACH information；
The determining module 12, for according to the first time and the second time, determining first time lead TA；
First sending module 13, for sending the first TA to the terminal, so that the terminal is according to institute
It states the first TA and sends business information；
The acquisition module 11 is additionally operable to obtain the movement speed of the terminal；
The determining module 12 is additionally operable to determine twoth TA corresponding with the movement speed according to the movement speed.
Further, when the movement speed is equal to 0, the 2nd TA is the first TA；
The determining module 12, for when the movement speed be not equal to 0 when, according to pre-stored movement speed and scheduling
Period correspondence determines the movement speed corresponding dispatching cycle；
First sending module 13, for indicating that the terminal is sent corresponding dispatching cycle according to the movement speed
2nd PRACH information；
The determining module 12, for determining the 2nd TA according to the 2nd PRACH information.
Further, first sending module 13, for according to the movement speed corresponding dispatching cycle, sending the
Two instruction information, the second instruction information are used to indicate the terminal and send the 2nd PRACH information in the third time；
First receiving module 10, for receiving the 2nd PRACH information that the terminal is sent；
The acquisition module 11, for obtaining the 4th time for receiving the 2nd PRACH information；
The determining module 12, for determining the 2nd TA according to the third time and the 4th time.
Further, the determining module 12, in the pre-stored movement speed and correspondence dispatching cycle
It is middle to search the corresponding movement speed range of the movement speed, determine that the movement speed range is the corresponding dispatching cycle
The movement speed corresponding dispatching cycle.
Further, as shown in fig. 6, described device further includes：Setup module 14,
The setup module 14, for when the movement speed is equal to 0, setting schedule flag to be 0；It is additionally operable to when described
When movement speed is not equal to 0, setting schedule flag is 1.
Further, first sending module 13, for meeting default item when the uplink quality for monitoring the terminal
It during part, sends third and indicates information to the terminal, the third instruction information indicates that the terminal sends the in the 5th time
Three PRACH information.
Further, first receiving module 10, for receiving the status information that the terminal is sent, the state letter
Breath carries the movement speed of the terminal；
Alternatively, the acquisition module 11, for measuring the motion state of the terminal, obtains the mobile speed of the terminal
Degree.
Specifically, the understanding of synchronizing information device provided in an embodiment of the present invention can be with reference implementation example one to embodiment three
Information synchronization method explanation, details are not described herein for the present embodiment.
The synchronizing information device that the embodiment of the present invention provides, base station instruction terminal send PRACH information, are referred to by record
Show that terminal sends the time of PRACH information and receives the PRACH information times of terminal transmission, determine that the upstream time of terminal carries
Preceding amount.Simultaneously according to the situation of movement of terminal, the instruction that issues to mobile terminal periodic, instruction terminal sends PRACH letters
Breath, to ensure the accurate of the Timing Advance of mobile terminal.Base station and end message interaction under list carrier mode are ensured
Accuracy.
Embodiment five
The embodiment of the present invention provides a kind of synchronizing information device 2, as shown in fig. 7, described device includes：Second receiving module
20th, the second sending module 21,
Second receiving module 20, for receiving the first instruction information, the first instruction information is used to indicate terminal
The first PRACH information is sent in first time；
Second sending module 21, for sending the first PRACH information to base station；
For receiving the first TA that the base station is sent, industry is sent according to the first TA for second receiving module 20
Business information.
Further, second sending module 21, for when detecting the base station uplink loss, sending the 4th
PRACH information is to the base station.
Further, second receiving module 20, for receiving the second instruction information that the base station is sent, described the
Two instruction information instructions send the 2nd PRACH information in the third time；
Second sending module 21, for sending the 2nd PRACH information to the base station.
Specifically, the understanding of synchronizing information device provided in an embodiment of the present invention can be with reference implementation example one to embodiment three
Information synchronization method explanation, details are not described herein for the present embodiment.
The synchronizing information device that the embodiment of the present invention provides, base station instruction terminal send PRACH information, are referred to by record
Show that terminal sends the time of PRACH information and receives the PRACH information times of terminal transmission, determine that the upstream time of terminal carries
Preceding amount.Simultaneously according to the situation of movement of terminal, the instruction that issues to mobile terminal periodic, instruction terminal sends PRACH letters
Breath, to ensure the accurate of the Timing Advance of mobile terminal.Base station and end message interaction under list carrier mode are ensured
Accuracy.
It should be understood by those skilled in the art that, the embodiment of the present invention can be provided as method, system or computer program
Product.Therefore, the shape of the embodiment in terms of hardware embodiment, software implementation or combination software and hardware can be used in the present invention
Formula.Moreover, the present invention can be used can use storage in one or more computers for wherein including computer usable program code
The form of computer program product that medium is implemented on (including but not limited to magnetic disk storage and optical memory etc.).
The present invention be with reference to according to the method for the embodiment of the present invention, the flow of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that it can be realized by computer program instructions every first-class in flowchart and/or the block diagram
The combination of flow and/or box in journey and/or box and flowchart and/or the block diagram.These computer programs can be provided
The processor of all-purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices is instructed to produce
A raw machine so that the instruction performed by computer or the processor of other programmable data processing devices is generated for real
The device of function specified in present one flow of flow chart or one box of multiple flows and/or block diagram or multiple boxes.
These computer program instructions, which may also be stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that the instruction generation being stored in the computer-readable memory includes referring to
Enable the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one box of block diagram or
The function of being specified in multiple boxes.
These computer program instructions can be also loaded into computer or other programmable data processing devices so that counted
Series of operation steps are performed on calculation machine or other programmable devices to generate computer implemented processing, so as in computer or
The instruction offer performed on other programmable devices is used to implement in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in a box or multiple boxes.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.
Claims (20)
1. a kind of information synchronization method, which is characterized in that the method includes：
The first instruction information is sent to terminal, the first instruction information indicates that the terminal sends the first physics in first time
Random access channel PRACH information；
The first PRACH information that the terminal is sent is received, obtains the second time for receiving the first PRACH information；
According to the first time and the second time, first time lead TA is determined；
The first TA is sent to the terminal, so that the terminal sends business information according to the first TA；
The movement speed of the terminal is obtained, twoth TA corresponding with the movement speed is determined according to the movement speed.
2. according to the method described in claim 1, it is characterized in that, described determine and the mobile speed according to the movement speed
Corresponding 2nd TA is spent, including：
When the movement speed is equal to 0, the 2nd TA is the first TA；
When the movement speed is not equal to 0, according to pre-stored movement speed and correspondence dispatching cycle, the shifting is determined
Indicate that the terminal sends the 2nd PRACH corresponding dispatching cycle according to the movement speed dynamic speed corresponding dispatching cycle
Information determines the 2nd TA according to the 2nd PRACH information.
3. according to the method described in claim 2, it is characterized in that, described refer to corresponding dispatching cycle according to the movement speed
Show that the terminal sends the 2nd PRACH information, the 2nd TA is determined according to the 2nd PRACH information, including：
According to the movement speed corresponding dispatching cycle, the second instruction information is sent, the second instruction information is used to indicate
The terminal sends the 2nd PRACH information in the third time；
The 2nd PRACH information that the terminal is sent is received, obtains the 4th time for receiving the 2nd PRACH information,
2nd TA is determined according to the third time and the 4th time.
4. according to the method described in claim 2, it is characterized in that, the movement speed that is pre-stored of the basis and dispatching cycle pair
It should be related to, determine the movement speed corresponding dispatching cycle, including：
The corresponding movement speed of the movement speed is searched in the pre-stored movement speed and dispatching cycle correspondence
Range determines the movement speed range corresponding dispatching cycle for the movement speed corresponding dispatching cycle.
5. according to the method described in claim 2, it is characterized in that, the method further includes：
When the movement speed is equal to 0, setting schedule flag is 0；
When the movement speed is not equal to 0, setting schedule flag is 1.
6. according to the method described in claim 1, it is characterized in that, the method further includes：
When the uplink quality for monitoring the terminal meets preset condition, send third and indicate information to the terminal, it is described
Third instruction information indicates that the terminal sends the 3rd PRACH information in the 5th time.
7. method according to any one of claims 1 to 6, which is characterized in that the movement speed for obtaining the terminal,
Including：
The status information that the terminal is sent is received, the status information carries the movement speed of the terminal；
Alternatively, measuring the motion state of the terminal, the movement speed of the terminal is obtained.
8. a kind of information synchronization method, which is characterized in that the method includes：
The first instruction information is received, the first instruction information is used to indicate terminal and sends the first PRACH information in first time；
The first PRACH information is sent to base station；
The first TA that the base station is sent is received, business information is sent according to the first TA.
9. according to the method described in claim 8, it is characterized in that, the method further includes：
When detecting the base station uplink loss, the 4th PRACH information is sent to the base station.
10. according to the method described in claim 8, it is characterized in that, in the first TA for receiving the base station and sending, according to
After first TA sends business information, including：
The second instruction information that the base station is sent is received, the second instruction information instruction sends second in the third time
PRACH information；
The 2nd PRACH information is sent to the base station.
11. a kind of synchronizing information device, which is characterized in that described device includes：First receiving module, acquisition module determine mould
Block, the first sending module；Wherein,
First sending module, for sending the first instruction information to terminal, the first instruction information indicates the terminal
The first Physical Random Access Channel PRACH information is sent in first time；
First receiving module, for receiving the first PRACH information that the terminal is sent；
The acquisition module, for obtaining the second time for receiving the first PRACH information；
The determining module, for according to the first time and the second time, determining first time lead TA；
First sending module, for sending the first TA to the terminal, so that the terminal is according to described first
TA sends business information；
The acquisition module is additionally operable to obtain the movement speed of the terminal；
The determining module is additionally operable to determine twoth TA corresponding with the movement speed according to the movement speed.
12. according to the devices described in claim 11, which is characterized in that
When the movement speed is equal to 0, the 2nd TA is the first TA；
The determining module, for when the movement speed be not equal to 0 when, according to pre-stored movement speed and dispatching cycle pair
It should be related to, determine the movement speed corresponding dispatching cycle；
First sending module, for indicating that the terminal sends second corresponding dispatching cycle according to the movement speed
PRACH information；
The determining module, for determining the 2nd TA according to the 2nd PRACH information.
13. device according to claim 12, which is characterized in that
First sending module, it is described for according to the movement speed corresponding dispatching cycle, sending the second instruction information
Second instruction information is used to indicate the terminal and sends the 2nd PRACH information in the third time；
First receiving module, for receiving the 2nd PRACH information that the terminal is sent；
The acquisition module, for obtaining the 4th time for receiving the 2nd PRACH information；
The determining module, for determining the 2nd TA according to the third time and the 4th time.
14. device according to claim 12, which is characterized in that
The determining module, for searching the mobile speed in the pre-stored movement speed and dispatching cycle correspondence
Corresponding movement speed range is spent, determines that the movement speed range corresponding dispatching cycle corresponds to for the movement speed
Dispatching cycle.
15. device according to claim 12, which is characterized in that described device further includes：Setup module,
The setup module, for when the movement speed is equal to 0, setting schedule flag to be 0；It is additionally operable to when the mobile speed
When degree is not equal to 0, setting schedule flag is 1.
16. according to the devices described in claim 11, which is characterized in that
First sending module refers to for when the uplink quality for monitoring the terminal meets preset condition, sending third
Show information to the terminal, the third instruction information indicates that the terminal sends the 3rd PRACH information in the 5th time.
17. according to claim 11 to 16 any one of them device, which is characterized in that
First receiving module, for receiving the status information that the terminal is sent, the status information carries the terminal
Movement speed；
Alternatively, the acquisition module, for measuring the motion state of the terminal, obtains the movement speed of the terminal.
18. a kind of synchronizing information device, which is characterized in that described device includes：Second receiving module, the second sending module,
Second receiving module, for receiving the first instruction information, the first instruction information is used to indicate terminal first
Time sends the first PRACH information；
Second sending module, for sending the first PRACH information to base station；
For receiving the first TA that the base station is sent, business information is sent according to the first TA for second receiving module.
19. device according to claim 18, which is characterized in that
Second sending module, for when detecting the base station uplink loss, sending the 4th PRACH information to the base
It stands.
20. device according to claim 18, which is characterized in that
Second receiving module, for receiving the second instruction information that the base station is sent, the second instruction information instruction
The 2nd PRACH information is sent in the third time；
Second sending module, for sending the 2nd PRACH information to the base station.
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| CN201710003574.8A CN108271274A (en) | 2017-01-04 | 2017-01-04 | A kind of information synchronization method and device |
| PCT/CN2017/105773 WO2018126756A1 (en) | 2017-01-04 | 2017-10-11 | Information synchronization method and device |
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| WO2018126756A1 (en) | 2018-07-12 |
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