CN106452648B - A kind of method for synchronizing time and communication terminal - Google Patents
A kind of method for synchronizing time and communication terminal Download PDFInfo
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- H—ELECTRICITY
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- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0635—Clock or time synchronisation in a network
- H04J3/0685—Clock or time synchronisation in a node; Intranode synchronisation
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Abstract
The present invention discloses a kind of method for synchronizing time, is related to field of communication technology, and time server the number N, M, N of the address and continuous synchronization of presetting M time server are natural number M >=N >=2；Time synchronization request continuously is initiated to N number of time server by address, N number of time server is chosen from high to low according to pre-set priority；Whether judgement returns the result comprising at least one temporal information, if being then one of temporal information by system time synchronization；Otherwise terminate this time synchronization.Communication terminal continuously initiates time synchronization request at least two time servers, improves the success rate of first time time synchronization, accelerates the speed of time synchronization.In addition, time server is chosen from high to low according to preset priority, it is further ensured that and initiates the success rate of synchronization request in first time.
Description
The application is in entitled " a kind of method for synchronizing time and communication terminal " proposed on June 26th, 2014
The divisional application of state's application for a patent for invention 201410289847.6.
Technical field
The present invention relates to fields of communication technology, more particularly to a kind of method for synchronizing time and communication terminal.
Background technique
In communication terminal, need to record the time of various events, such as E-mail information, file creation time, database
Time etc. is handled, if the time inaccuracy of communication terminal, many applications will be unable to work normally, it is therefore desirable to Yi Taobiao
Quasi- temporal information.Time synchronization technique is by time server from time source, as GPS (GPS,
Global Position System) standard time is obtained, the standard time each communication terminal will be sent to by network.
Currently, communication terminal when realizing time synchronization, first turns on data service function (such as opening network) and automatic
Time synchronization function, communication terminal are connected to time server, after time server returns to GPS time information, communication terminal
It is the system time format of terminal by the Time form transformation of GPS time information, is GPS time by the time synchronization of terminal.When
Time server returns to time-out or GPS time information is lost, then time synchronization fails, at this point, a kind of existing practice is communication
Terminal is to guarantee to synchronize and successfully preset multiple time server addresses, when current time server returns to failure, then between
It initiates to synchronize to next time server again every after a certain period of time.
During carrying out the invention, at least there are the following problems in the prior art for inventor's discovery: although can be with
It repeatedly initiates to synchronize to increase to multiple time servers to synchronize successful probability, but we are in first time it is clearly desirable that initiate same
Time synchronization just can be successfully completed when step request, and the prior art not can guarantee the success rate of first time time synchronization；And work as
Preamble unsuccessfully needs that certain time is waited just to can be carried out to be synchronized next time, reduces the speed of time synchronization.
Summary of the invention
The present invention provides a kind of method for synchronizing time and communication terminals, can be improved the success rate of first time time synchronization
And time synchronization can be rapidly completed.
To solve the above-mentioned problems, the invention discloses a kind of method for synchronizing time, comprising the following steps:
The address of default M time server and time server the number N, described M, N of continuous synchronization are natural number,
And M >=N >=2；Time synchronization request, N number of time server continuously are initiated to N number of time server by the address
It is chosen from high to low from the M time server according to pre-set priority；Receive N number of time server
It returns the result, is returned the result described in judgement whether comprising at least one temporal information, if so, being wherein by system time synchronization
One temporal information；Otherwise, terminate this time synchronization.
It is a further object to provide a kind of time synchronization communication terminals, comprising:
Setting unit, it is described for presetting the address of M time server and the time server number N of continuous synchronization
M, N is natural number, and M >=N >=2；Transmission unit, for continuously initiating the time to N number of time server by the address
Synchronization request, N number of time server are selected from the M time server according to pre-set priority from high to low
It takes；Whether receiving unit is returned the result for receiving returning the result for N number of time server, described in judgement comprising at least
One temporal information, if so, being one of temporal information by system time synchronization；Otherwise, terminate this time synchronization.
Compared with prior art, the present invention includes the following advantages:
In the present invention, communication terminal continuously initiates time synchronization request at least two time servers, avoids working as
It after preamble failure needs that certain time is waited just to can be carried out and synchronize next time, comparing once can only be to a time server
The success rate of first time time synchronization can not only be improved by initiating request, and accelerate the speed of time synchronization.In addition, at least
Two time servers continuously initiate time synchronization request when, time server be according to preset priority from high to low and
It chooses, being further ensured that when first time initiating synchronization request just can successfully complete time synchronization.
Detailed description of the invention
Fig. 1 is a kind of method flow diagram of time synchronization of the embodiment of the present invention one；
Fig. 2 is a kind of method flow diagram of time synchronization of the embodiment of the present invention two；
Fig. 3 is a kind of Part Methods flow chart of time synchronization of the embodiment of the present invention three；
Fig. 4 is a kind of structure chart of time synchronization communication terminal of the embodiment of the present invention four.
Specific embodiment
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real
Applying mode, the present invention is described in further detail.
When synchronous to time server request time due to communication terminal, when time server may return to time-out or lose
Between information, so that current sync be caused to fail.In order to improve time synchronization success rate, the prior art is taken using multiple times are preset
It is engaged in device address, failing when current time server returns, then sending out to next time server again after separated in time
It rises and synchronizes.But it cannot be guaranteed the success rate of first time time synchronization and reduce the speed of time synchronization.
It simultaneously can be quickly complete in view of the above-mentioned problems, the present invention provides a kind of success rates that can be improved first time time synchronization
At the method for synchronizing time and communication terminal of time synchronization.
In the following, being described in detail by following each embodiment.
Embodiment one:
Referring to Fig.1, a kind of method flow diagram of time synchronization of the embodiment of the present invention one is shown, this method specifically can be with
The following steps are included:
Step 101, time server the number N, described M, N of the address and continuous synchronization of presetting M time server are equal
For natural number, and M >=N >=2.
In the embodiment of the present invention, time server using GPS signal as time source, certainly also may be selected Beidou signal,
The time sources such as IRIG-B code, OCXO, rubidium atomic clock, CDMA signal, time server embed NTP (network time
Protocol, Network Time Protocol)/SNTP (simple network time protocol, Simple Network Time Protocol) association
It discusses, the communication terminals such as computer, mobile phone, net book in synchronizing network.The working principle of NTP/SNTP agreement is to pass through exchange
The timestamp of time server and communication terminal calculates time delay and deviation of the communication terminal relative to time server, thus
Realize the synchronization of time.
Firstly, communication terminal obtain time server in a network address, such as 129.7.1.66ntp-
Sop.inria.frserver 210.72.145.44 (China national time service central server IP address),
Ntp.sjtu.edu.cn (network center, Shanghai Communications University ntp server address) etc..To guarantee synchronous success rate, to the greatest extent may be used
Can mostly obtain server address, in the present embodiment, selection M(the present embodiment M=5 from all servers got) it is a when
Between server default in communication terminal, naturally it is also possible to all server address got are defaulted to communication terminal
It is interior, the invention is not limited in this regard.And set time server number N(the present embodiment N=2 of continuous synchronization).
Step 102, time synchronization request, N number of time clothes are continuously initiated to N number of time server by the address
Business device is chosen from the M time server according to pre-set priority from high to low.
First the M time server is ranked up according to pre-set priority in the present embodiment, pre-set priority sequence
It can be and server is ranked up after comprehensively considering heterogeneous networks, different time zone factor, for example, using closer from communication terminal
Server relative to higher from the successful probability of the farther away server sync of communication terminal, using the server phase in local area network
It is higher for the successful probability of server sync in wide area network, therefore can will be located in local area network and nearest from communication terminal
The priority of time server is set as highest.
In the present embodiment, 2 are chosen from 5 time servers, selection mode carries out from high to low according to priority, example
Such as, this 5 time servers of server1- server5 according to pre-set priority sequence from high to low be server1,
Server3, server5, server2, server4, since the time server number of the continuous synchronization set is 2,
Using server1, server3 as the time server of this 2 continuous synchronizations.
The address of server1, server3 are preset in communication terminal, according to the address to this 2 time servers
Continuous to initiate time synchronization request, the sequence for initiating request can be carried out according to priority, such as first initiate the time to server1
Then synchronization request initiates time synchronization request to server2.Continuously time synchronization is initiated to N number of time server to refer to,
Communication terminal does not need that server1 is waited to return the result after initiating synchronization request to server1, and is to continue with to server2
Initiate request.
Step 103, returning the result for N number of time server is received, is returned the result described in judgement whether comprising at least
One temporal information, if so, being one of temporal information by system time synchronization；Otherwise, terminate this time synchronization.
After time server receives the request from communication terminal, timestamp is returned into communication terminal, wherein timestamp
Including the temporal information obtained from time source.
Since time server is busy or failure and other reasons, causing time server to return to time-out, (communication terminal setting is fixed
When device do not return the result also when reaching setting time, judge time-out) or return to error message (such as dns parse mistake or mesh
It is unreachable to mark address), communication terminal does not just receive temporal information at this time, is just unable to complete time synchronization yet.In the present embodiment,
Synchronization request continuously is initiated to multiple time servers, if at least one time server time of return information, illustrates this
Time synchronization is successful.If the non-time of return information of all time servers, the failure of this time synchronization.
In the embodiment of the present invention, communication terminal can be continuous at least two time servers in first time time synchronization
Time synchronization request is initiated on ground, avoids after current sync failure needing that certain time is waited just to can be carried out synchronizing next time,
It ensure that communication terminal carries out the success rate of time synchronization in first time.And continuously initiated the time clothes that time synchronization is requested
Device of being engaged in is chosen from high to low according to preset priority, and being further ensured that just can be in initiation synchronization request for the first time
The function deadline is synchronous.
Embodiment two:
Referring to Fig. 2, a kind of method flow diagram of time synchronization of the embodiment of the present invention two is shown, this method specifically can be with
The following steps are included:
Step 201, communication terminal opens network communicating function and time synchronization function.
Step 202, time server issues address by network.
Step 203, communication terminal receives the address and is stored in memory, and chooses M=10 Time Service therein
Device, and the time server number of continuous synchronization is set as N=4 and to retry synchronization times be K=3 time.
Preferably, 10 time servers of selection are marked, and the mapping relations of recording mark and address.Example
Such as, it is labeled as S1-S10.
It retries to synchronize and refer to after this synchronization failure, then re-start time synchronization.It is same when for the first time in the present embodiment
After step failure, then retry 2 times.
Step 204, N number of Time Service is chosen according to the sequence of pre-set priority from high to low from M time server
Device.
Pre-set priority can rule of thumb self-setting, in the present embodiment, comprehensively consider above-mentioned 10 time servers institute
In network and time zone factor, it is ranked up, such as will be taken from time of the communication terminal recently and in same local area network
Business device is classified as highest priority, and specific method is referring to step 101.Assuming that the sequence after 10 time server sequences are as follows: S6,
S2、S3、S1、S7、S5、S8、S10、S9、S4。
In the present embodiment, the time of 4 continuous synchronizations is chosen from above-mentioned 10 time servers according to priority orders
Server, respectively S6, S2, S3, S1.
Step 205, judge whether the value of K is greater than 0, if so then execute step 206, otherwise the end time is synchronous.
Step 206, communication terminal continuously initiates time synchronization request to N number of time server by the address.
After the time server for determining continuous synchronization is S6, S2, S3, S1, according to label and the mapping relations of address, to
This 4 time server sending time synchronization requests.
Specifically, the step 206 further includes following sub-step:
Sub-step a1 chooses i-th of time server according to the sequence of pre-set priority from high to low, to the Time Service
Device sending time synchronization request, wherein i=1.
The value of i is added 1, and judges i≤N by sub-step a2, if then returning to sub-step a1, otherwise terminates to send request, and
Execute step 207.
Step 207, communication terminal waiting time server returns the result.
Step 208, judge whether that N number of time server returns the result, if so then execute step 209；Otherwise step is returned
Rapid 207.
Step 209, judgement return the result in whether include at least one temporal information, if so then execute step 210；Otherwise
Execute step 211.
In the present embodiment, returning the result may include temporal information corresponding with time source, error message or time-out information,
If what is wherein returned is error message or time-out information, illustrate that the time server returns to failure.
It step 210, is one of temporal information by system time synchronization.
The equal time of return information of multiple time servers if it exists, then when choosing one of temporal information and being set as system
Between, the deadline is synchronous.
Step 211, the value that the value of K subtracts 1, N is added into 1, and return step 205.
After the failure of this time synchronization, time synchronization request is initiated to a time server of N ' again, the N ' is certainly
So number, and N ' > N, in the present embodiment, N '=N+1, i.e., under it is subsynchronous when continuous synchronization time server number it is more continuous than this
Synchronous time server number is more, can improve next hyposynchronous success rate in this way.
Embodiment three:
Referring to Fig. 3, a kind of Part Methods flow chart of time synchronization of the embodiment of the present invention three, the present embodiment step are shown
Rapid 301-307 is similar to two step 201-207 of embodiment, and details are not described herein.Unlike embodiment two, in communication terminal
After waiting time server returns the result, step 308 is executed.
Step 308, whether it is temporal information that judgement returns the result, no to then follow the steps 310 if so then execute step 309.
Step 309, the priority of corresponding time server is improved, and executes step 311.
Even if being set as the success rate of optimal time server time of return information it can also happen that changing, such as service
Device failure and other reasons may cause communication terminal according to set priority ranking in this way and initiate time synchronization failure for the first time
Probability increases.What time server returned is temporal information, illustrates that the time server can work normally, its priority is improved
Afterwards, when communication terminal needs time synchronization again, the ranking of the time server will be located further forward, therefore be initiated same for the first time
It is also bigger to walk successful probability.
Step 310, the priority of corresponding time server is reduced, and executes step 313.
As described previously for the time server of cisco unity malfunction, such as returns to time-out information or returns to error message,
It reduces its priority to be also equivalent to reduce the risk of synchronization failure, can equally reach the success for improving first time time synchronization
The effect of rate.
Step 311, judge whether the temporal information returned is first temporal information reached, if so then execute step
312, otherwise ignore the temporal information.
Step 312, the temporal information is recorded, and executes step 313.
In time of return information, might not be returned according to the sequence for sending request, such as taken labeled as the time of S2
The temporal information that business device returns reaches communication terminal at first, and S1 takes second place.The temporal information for recording S2, ignores the temporal information of S1.
And the temporal information of S2 is synchronized in following step 316, it can guarantee in this way and adjustment realized to the priority of N number of time server
In the case where, it avoids when there are multiple server time of return information, repeats that system time is arranged.
Step 313, judge whether that N number of time server returns the result, if so then execute step 314, otherwise return to step
Rapid 307.
It so just can guarantee and adjustment realized to the priority of N number of time server.
Step 314, judge whether that N number of time server returns to failure, then follow the steps 315 in this way, otherwise execute step
Rapid 316.
Step 315, the value of K is subtracted into 1, and return step 305.
It step 316, is the temporal information of record by system time synchronization, the deadline is synchronous.
In the present embodiment, the result that can be returned according to time server adjusts priority, by success time of return information
Server precedence improves, and the server precedence for returning to failure reduces, so when next period carries out time synchronization, from
It is easier success time of return information according to N number of time server that priority is chosen from high to low in M time server, is mentioned
High first hyposynchronous success rate.
For the various method embodiments described above, for simple description, therefore, it is stated as a series of action combinations, but
Be those skilled in the art should understand that, the present invention is not limited by the sequence of acts described because according to the present invention, certain
A little steps can be performed in other orders or simultaneously.Secondly, those skilled in the art should also know that, it is retouched in specification
The embodiment stated belongs to preferred embodiment, and related actions and modules are not necessarily necessary for the present invention.
Example IV:
Referring to Fig. 4, a kind of structural block diagram of time synchronization communication terminal of the embodiment of the present invention four is shown.The communication is whole
End 4 is specifically included with lower unit:
Setting unit 401, for presetting the address of M time server and the time server number N of continuous synchronization, institute
Stating M, N is natural number, and M >=N >=2；
Transmission unit 402, for continuously initiating time synchronization request, the N to N number of time server by the address
A time server is chosen from the M time server according to pre-set priority from high to low；
Receiving unit 403, returned the result for receiving returning the result for N number of time server, described in judgement whether
Comprising at least one temporal information, if so, being one of temporal information by system time synchronization；Otherwise, when terminating this
Between it is synchronous.
The setting unit includes the first priority adjustment unit, for mentioning when described return the result as temporal information
The priority of high corresponding time server.
Whether the receiving unit further includes detection unit, be to return to time-out or return wrong for detecting described return the result
False information.
The setting unit includes the second priority adjustment unit, for returning the result as return time-out or returning when described
When error message, the priority of corresponding time server is reduced.
The receiving unit includes judging unit, for sentencing when described return the result comprising at least one temporal information
Whether currently received temporal information of breaking is the temporal information reached at first, if so, being then current receive by system time synchronization
Temporal information；Otherwise ignore currently received temporal information.
The receiving unit includes retrying unit, for after described this time synchronization of end, the communication terminal to be again
Time synchronization request continuously is initiated to a time server of N ', and the N ' is natural number, and N ' > N.
For communication terminal embodiment, since it is basically similar to the method embodiment, so be described relatively simple,
The relevent part can refer to the partial explaination of embodiments of method.
All the embodiments in this specification are described in a progressive manner, the highlights of each of the examples are with
The difference of other embodiments, the same or similar parts between the embodiments can be referred to each other.
The present invention can describe in the general context of computer-executable instructions executed by a computer, such as program
Module.Generally, program module includes routines performing specific tasks or implementing specific abstract data types, programs, objects, group
Part, data structure etc..The present invention can also be practiced in a distributed computing environment, in these distributed computing environments, by
Task is executed by the connected remote processing devices of communication network.In a distributed computing environment, program module can be with
In the local and remote computer storage media including storage equipment.
Finally, it is to be noted that, herein, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that the process, method, commodity or the equipment that include a series of elements not only include that
A little elements, but also including other elements that are not explicitly listed, or further include for this process, method, commodity or
The intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...", is not arranged
Except there is also other identical elements in process, method, commodity or the equipment for including the element.
Above to one kind provided by the present invention., it is described in detail, specific case used herein is to this hair
Bright principle and embodiment is expounded, method of the invention that the above embodiments are only used to help understand and its
Core concept；At the same time, for those skilled in the art, according to the thought of the present invention, in specific embodiment and application
There will be changes in range, in conclusion the contents of this specification are not to be construed as limiting the invention.
Claims (6)
1. a kind of method for synchronizing time, which comprises the following steps: communication terminal continuously takes at least two times
Device initiation time synchronization of being engaged in is requested；Whether receiving time server returns the result, return the result and believed described in judgement comprising the time
Breath；If so, being the temporal information by the system time synchronization of communication terminal, the preferential of corresponding time server is improved
Grade, if it is not, then reducing the priority of corresponding time server.
2. according to the method described in claim 1, it is characterized by: returning the result described in working as at least two comprising temporal information
When, it is returned the result using what is reached at first.
3. according to the method described in claim 1, it is characterized by: communication terminal is continuously initiated at least two time servers
Time synchronization request, specifically includes: according to the priority ranking of time server, communication terminal is continuously taken at least two times
Device initiation time synchronization of being engaged in is requested.
4. a kind of time synchronization communication terminal characterized by comprising transmission unit, for communication terminal continuously at least two
A time server initiates time synchronization request；Receiving unit, for returning the result for receiving time server, described in judgement
It whether returns the result comprising temporal information；If so, being the temporal information, raising pair by the system time synchronization of communication terminal
The priority for the time server answered, if it is not, then reducing the priority of corresponding time server.
5. communication terminal according to claim 4, it is characterised in that: further include setting unit, for when at least two institutes
It states when returning the result comprising temporal information, is returned the result using what is reached at first.
6. communication terminal according to claim 4, it is characterised in that: further include setting unit, for according to Time Service
The priority ranking of device, communication terminal continuously initiate time synchronization request at least two time servers.
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| CN201410289847.6A CN104052565B (en) | 2014-06-26 | 2014-06-26 | Time synchronization method and communication terminal |
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| CN105119679B (en) * | 2015-09-24 | 2017-09-29 | 烽火通信科技股份有限公司 | A kind of method and system for realizing that SNTP client times are synchronous |
| CN105610958A (en) * | 2016-01-13 | 2016-05-25 | 广东欧珀移动通信有限公司 | Method and device for selecting time synchronization server and intelligent terminal |
| CN107071586B (en) * | 2017-04-06 | 2020-04-24 | 深圳Tcl新技术有限公司 | System time setting method and device of television terminal |
| CN111132302B (en) * | 2019-12-27 | 2022-05-03 | 京信网络系统股份有限公司 | Time synchronization method, device, base station equipment and computer readable storage medium |
| CN112332939A (en) * | 2020-11-04 | 2021-02-05 | 广州朗国电子科技有限公司 | Time synchronization method and device of android system, terminal device and storage medium |
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| CN106452648A (en) | 2017-02-22 |
| CN104052565A (en) | 2014-09-17 |
| CN104052565B (en) | 2017-01-25 |
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