CN104052565A - Time synchronization method and communication terminal - Google Patents
Time synchronization method and communication terminal Download PDFInfo
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- CN104052565A CN104052565A CN201410289847.6A CN201410289847A CN104052565A CN 104052565 A CN104052565 A CN 104052565A CN 201410289847 A CN201410289847 A CN 201410289847A CN 104052565 A CN104052565 A CN 104052565A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- 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 invention discloses a time synchronization method and relates to the technical field of communication. Addresses of M time servers and the number N of the time servers in continuous synchronization are preset, wherein M and N are natural numbers, and M>=N>=2; a time synchronization request is issued to the N time servers continuously through the addresses, and the N time servers are selected from high to low according to preset priorities; whether a return result includes at least one piece of time information or not is judged, and if yes, system time is synchronized to be one piece of time information; if not, the time synchronization is ended. The time synchronization request is continuously issued to at least two time servers through a communication terminal, and therefore the success rate of time synchronization at the first time is increased, and speed of time synchronization is increased. In addition, the time servers are selected from high to low according to the preset priorities, and then the success rate of issuing the synchronization request at the first time is further guaranteed.
Description
Technical field
The present invention relates to communication technical field, particularly relate to a kind of method for synchronizing time and communication terminal.
Background technology
In communication terminal, need to record the time of variety of event, as E-mail information, document creation time, database processing time etc., if the time of communication terminal is inaccurate, so a lot of application cannot normally be worked, and therefore need standard set temporal information.Time synchronization technique be by time server from time source, as GPS (Global Position System) (GPS, Global Position System) obtain the standard time, will the standard time send to each communication terminal by network.
At present, communication terminal is in the time realizing time synchronized, first turn-on data business function (as opening network) and automatic time synchronizing function, communication terminal is connected to time server, when time server returns after gps time information, the system time form that communication terminal is terminal by the Time form transformation of gps time information is gps time by the time synchronized of terminal.When time server returns to overtime or gps time information dropout, time synchronized failure, now, existing a kind of practice is that communication terminal is to ensure synchronously successfully to set in advance multiple time servers address, when current time server returns to failure, after the certain hour of interval, again initiate synchronous to next time server.
Carrying out in the invention process, inventor finds that in prior art, at least there are the following problems: although can repeatedly initiate synchronously to have increased synchronous successfully probability to multiple time servers, but we obviously wish in the time initiating synchronization request for the first time, to be just successfully completed time synchronized, and prior art cannot ensure the success rate of time synchronized for the first time; And it is next time synchronous that current synchronization failure need to wait for that certain hour just can carry out, reduce the speed of time synchronized.
Summary of the invention
The invention provides a kind of method for synchronizing time and communication terminal, can improve the success rate of time synchronized for the first time and fast the deadline synchronous.
In order to address the above problem, the invention discloses a kind of method for synchronizing time, comprise the following steps:
The default address of M time server and the time server number N of continuous synchronization, described M, N are natural number, and M >=N >=2; Initiate time synchronized request to N time server continuously by described address, a described N time server is chosen from high to low according to pre-setting priority from a described M time server; Receiving returning results of a described N time server, return results whether comprise at least one temporal information described in judgement, is if so, synchronously one of them temporal information by system time; Otherwise, finish this time synchronized.
Another object of the present invention is to provide a kind of time synchronized communication terminal, comprising:
Setting unit, for the default address of M time server and the time server number N of continuous synchronization, described M, N are natural number, and M >=N >=2; Transmitting element, for initiating time synchronized request to N time server continuously by described address, a described N time server is chosen from high to low according to pre-setting priority from a described M time server; Receiving element, for receiving returning results of a described N time server, returns results whether comprise at least one temporal information described in judgement, is if so, synchronously one of them temporal information by system time; Otherwise, finish this time synchronized.
Compared with prior art, the present invention includes following advantage:
In the present invention, communication terminal is initiated time synchronized request continuously at least two time servers, avoid after current synchronization failure, needing to wait for that certain hour is once synchronous on just carrying out, compare once and can only initiate to ask to improve the success rate of time synchronized for the first time to a time server, and accelerated the speed of time synchronized.In addition, while initiating continuously time synchronized request at least two time servers, time server is chosen from high to low according to default priority, further ensures just can be successfully completed time synchronized in the time initiating synchronization request for the first time.
brief description of the drawings
Fig. 1 is the method flow diagram of a kind of time synchronized of the embodiment of the present invention one;
Fig. 2 is the method flow diagram of a kind of time synchronized of the embodiment of the present invention two;
Fig. 3 is the Part Methods flow chart of a kind of time synchronized of the embodiment of the present invention three;
Fig. 4 is the structure chart of a kind of time synchronized communication terminal of the embodiment of the present invention four.
Embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Because communication terminal is when synchronous to time server request time, time server may return to overtime or drop-out time information, thereby causes current synchronization failure.In order to improve time synchronized success rate, prior art adopts default multiple time servers address, when current time server returns to failure, after the certain hour of interval, again initiates synchronous to next time server.But can not ensure the success rate of time synchronized for the first time and reduce the speed of time synchronized.
For the problems referred to above, the invention provides and a kind ofly can improve the success rate of time synchronized for the first time synchronous method for synchronizing time and communication terminal of deadline fast.
Below, be described in detail by following each embodiment.
embodiment mono-:
With reference to Fig. 1, show the method flow diagram of a kind of time synchronized of the embodiment of the present invention one, the method specifically can comprise the following steps:
Step 101, the default address of M time server and the time server number N of continuous synchronization, described M, N are natural number, and M >=N >=2.
In the embodiment of the present invention, time server is using gps signal as time source, certainly also can select Big Dipper signal, IRIG-B code, OCXO, rubidium atomic clock, CDMA signal equal time source, the embedded NTP of time server (network time protocol, NTP (Network Time Protocol))/SNTP (simple network time protocol, SNTP) agreement, the communication terminal such as computer in synchronizing network, mobile phone, net book.The operation principle of NTP/SNTP agreement is by the timestamp of swap time server and communication terminal, calculates time delay and the deviation of communication terminal with respect to time server, thereby realizes the synchronous of time.
First, communication terminal obtains the address of time server in the network of place, 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 of Shanghai Communications University ntp server address) etc.For ensureing synchronous success rate, obtain as much as possible server address, in the present embodiment, from all servers that get, select M(the present embodiment M=5) individual time server defaults in communication terminal, all server address that get all can certainly be defaulted in communication terminal, the present invention is not restricted this.And set time server number N(the present embodiment N=2 of continuous synchronization).
Step 102, initiates time synchronized request to N time server continuously by described address, and a described N time server is chosen from high to low according to pre-setting priority from a described M time server.
In the present embodiment, first a described M time server is sorted according to pre-setting priority, default prioritization can be after considering heterogeneous networks, different time zone factor, server to be sorted, for example, adopt from the communication terminal server close to respect to the successful probability of server sync away from is higher from communication terminal, adopt the server in local area network (LAN) higher with respect to the successful probability of the server sync in wide area network, therefore can will be positioned at local area network (LAN) and be made as the highest from the priority of the nearest time server of communication terminal.
In the present embodiment, from 5 time servers, choose 2, the mode of choosing is carried out from high to low according to priority, for example, these 5 time servers of server1-server5 are server1, server3, server5, server2, server4 according to pre-setting priority order from high to low, because the time server number of the continuous synchronization of setting is 2, the therefore time server using server1, server3 as these 2 continuous synchronization.
In communication terminal, be preset with the address of server1, server3, initiate continuously time synchronized request according to this address to these 2 time servers, initiating the order of request can carry out according to priority, for example first initiate time synchronized request to server1, then initiate time synchronized request to server2.Initiate time synchronized to N time server continuously and refer to, after initiating synchronization request to server1, communication terminal does not need to wait for that server1 returns results, but continues to initiate request to server2.
Step 103, receives returning results of a described N time server, returns results whether comprise at least one temporal information described in judgement, is if so, synchronously one of them temporal information by system time; Otherwise, finish this time synchronized.
Time server receives after the request from communication terminal, and timestamp is returned to communication terminal, and wherein timestamp comprises the temporal information of obtaining from time source.
Because time server is busy or failure and other reasons, cause time server to return to overtime (communication terminal setting timer, when arriving setting-up time, also do not return results judge overtime) or return to error message (as dns parse error, or destination address is unreachable), now communication terminal does not just receive temporal information, just cannot the deadline synchronous yet.In the present embodiment, initiate synchronization request to multiple time servers continuously, if having a time server return time information at least, illustrate that this time synchronized is successful.If all time servers are not return time information, this time synchronized failure all.
In the embodiment of the present invention, communication terminal can be initiated continuously time synchronized request at least two time servers in the time of time synchronized for the first time, avoid after current synchronization failure, needing to wait for that certain hour is once synchronous on just carrying out, ensured that communication terminal is carrying out the success rate of time synchronized for the first time.And the time server by continuous initiation time synchronized request is chosen from high to low according to default priority, further ensure just can be successfully completed time synchronized in the time initiating synchronization request for the first time.
embodiment bis-:
With reference to Fig. 2, show the method flow diagram of a kind of time synchronized of the embodiment of the present invention two, the method specifically can comprise the following steps:
Step 201, communication terminal is opened network communicating function and time synchronized function.
Step 202, time server issues address by network.
Step 203, communication terminal receives described address and is stored in memory, chooses M=10 time server wherein, and the time server number of setting continuous synchronization is that N=4 and retry synchronization times are K=3 time.
Preferably, choose 10 time servers are carried out to mark, and record the mapping relations of mark and address.For example, be labeled as S1-S10.
Retry synchronously refers to when after this synchronization failure, then re-starts time synchronized.In the present embodiment, when after synchronization failure for the first time, then retry 2 times.
Step 204 is chosen N time server according to pre-setting priority order from high to low from M time server.
Pre-setting priority can rule of thumb arrange voluntarily, in the present embodiment, consider above-mentioned 10 time server place networks and time zone factor, it is sorted, for example by from communication terminal recently and the time server that is positioned at same local area network (LAN) to classify priority as the highest, concrete grammar is referring to step 101.Suppose that 10 orders after time server sequence are: S6, S2, S3, S1, S7, S5, S8, S10, S9, S4.
In the present embodiment, from above-mentioned 10 time servers, choose the time server of 4 continuous synchronization according to priority orders, be respectively S6, S2, S3, S1.
Step 205, judges whether the value of K is greater than 0, if perform step 206, otherwise the end time is synchronous.
Step 206, communication terminal is initiated time synchronized request to N time server continuously by described address.
After the time server of determining continuous synchronization is S6, S2, S3, S1, according to the mapping relations of mark and address, to these 4 time server transmitting time synchronization request.
Particularly, described step 206 also comprises following sub-step:
Sub-step a1, chooses i time server according to pre-setting priority order from high to low, to this time server transmitting time synchronization request, wherein i=1.
Sub-step a2, adds 1 by the value of i, and judges i≤N, if return to sub-step a1, otherwise finishes to send request, and performs step 207.
Step 207, communication terminal stand-by period server returns results.
Step 208, judges whether that N time server all returns results, if perform step 209; Otherwise return to step 207.
Whether step 209, comprise at least one temporal information during judgement returns results, if perform step 210; Otherwise execution step 211.
In the present embodiment, return results and can comprise the temporal information corresponding with time source, error message or time-out information, if what wherein return is error message or time-out information, illustrate that this time server returns to failure.
Step 210 is synchronously one of them temporal information by system time.
If there is the equal return time information of multiple time servers, to choose one of them temporal information and be set to system time, the deadline is synchronous.
Step 211, the value that the value of K is deducted to 1, N adds 1, and returns to step 205.
After this time synchronized failure, again initiate time synchronized request to the individual time server of N ', described N ' is natural number, and N ' >N, in the present embodiment, N '=N+1, lower when subsynchronous the time server number of continuous synchronization more than the time server number of this continuous synchronization, can improve like this next hyposynchronous success rate.
embodiment tri-:
With reference to Fig. 3, show the Part Methods flow chart of a kind of time synchronized of the embodiment of the present invention three, the present embodiment step 301-307 is similar to embodiment bis-step 201-207, does not repeat them here.Different from embodiment bis-, after the communication terminal stand-by period, server returned results, execution step 308.
Step 308, judges whether return results is temporal information, if perform step 309, otherwise execution step 310.
Step 309, improves the priority of corresponding time server, and performs step 311.
Also may change even if be set as the success rate of optimum time server return time information, the reasons such as such as server failure, the probability that may cause communication terminal to initiate for the first time time synchronized failure according to set prioritization like this increases.What time server returned is temporal information, illustrate that this time server can normally work, after its priority is improved, in the time that communication terminal needs again time synchronized, the rank of this time server will be more forward, and therefore synchronous successful probability is also larger for the first time in initiation.
Step 310, reduces the priority of corresponding time server, and performs step 313.
As mentioned above, for the time server of cisco unity malfunction, for example, return to time-out information or return to error message, reducing the risk that its priority also is just equivalent to reduce synchronization failure, can reach equally and improve the effect of the success rate of time synchronized for the first time.
Step 311, judges whether the temporal information of returning is first temporal information reaching, if perform step 312, otherwise ignores this temporal information.
Step 312, records this temporal information, and performs step 313.
In the time of return time information, might not return according to the order sending request, be for example labeled as the temporal information that the time server of S2 returns and arrive at first communication terminal, S1 takes second place.Record the temporal information of S2, ignore the temporal information of S1.And in following step 316 temporal information of synchronous S2, can ensure like this priority of N time server all to realize in the situation of adjustment, avoid, in the time there is multiple server return time information, repeating to arrange system time.
Step 313, judges whether that N time server all returns results, if perform step 314, otherwise returns to step 307.
So just can ensure the priority of N time server all to realize adjustment.
Step 314, judges whether that N time server all returns to failure, performs step 315 in this way, otherwise execution step 316.
Step 315, deducts 1 by the value of K, and returns to step 305.
Step 316, is synchronously the temporal information of record by system time, and the deadline is synchronous.
In the present embodiment, the result that can return according to time server is adjusted priority, the server priority of successful return time information is improved, the server priority of returning to failure reduces, so the next time period is while carrying out time synchronized, the easier successful return time information of N time server of choosing from high to low according to priority from M time server, improves the first hyposynchronous success rate.
For aforesaid each embodiment of the method, for simple description, therefore it is all expressed as to a series of combination of actions, but those skilled in the art should know, the present invention is not subject to the restriction of described sequence of movement, because according to the present invention, some step can adopt other orders or carry out simultaneously.Secondly, those skilled in the art also should know, the embodiment described in specification all belongs to preferred embodiment, and related action and module might not be that the present invention is necessary.
embodiment tetra-:
With reference to Fig. 4, show the structured flowchart of a kind of time synchronized communication terminal of the embodiment of the present invention four.This communication terminal 4 specifically comprises with lower unit:
Setting unit 401, for the default address of M time server and the time server number N of continuous synchronization, described M, N are natural number, and M >=N >=2;
Transmitting element 402, for initiating time synchronized request to N time server continuously by described address, a described N time server is chosen from high to low according to pre-setting priority from a described M time server;
Receiving element 403, for receiving returning results of a described N time server, returns results whether comprise at least one temporal information described in judgement, is if so, synchronously one of them temporal information by system time; Otherwise, finish this time synchronized.
Described setting unit comprises the first priority adjustment unit, for when described in while returning results as temporal information, improve the priority of corresponding time server.
Whether described receiving element also comprises detecting unit, return results as returning overtime or returning to error message for detection of described.
Described setting unit comprises the second priority adjustment unit, for when described in return results as returning overtimely or while returning to error message, reduce the priority of corresponding time server.
Described receiving element comprises judging unit, for when described in return results while comprising at least one temporal information, judge whether the temporal information of current reception is the temporal information arriving at first, in this way, be synchronously the temporal information of current reception by system time; Otherwise ignore the temporal information of current reception.
Described receiving element comprises retry unit, and after this time synchronized of described end, described communication terminal is initiated time synchronized request to the individual time server of N ' again continuously, and described N ' is natural number, and N ' >N.
For communication terminal embodiment, because it is substantially similar to embodiment of the method, so description is fairly simple, relevant part is referring to the part explanation of embodiment of the method.
Each embodiment in this specification all adopts the mode of going forward one by one to describe, and what each embodiment stressed is and the difference of other embodiment, between each embodiment identical similar part mutually referring to.
The present invention can describe in the general context of computer executable instructions, for example program module.Usually, program module comprises and carries out particular task or realize routine, program, object, assembly, data structure of particular abstract data type etc.Also can in distributed computing environment (DCE), put into practice the present invention, in these distributed computing environment (DCE), be executed the task by the teleprocessing equipment being connected by communication network.In distributed computing environment (DCE), program module can be arranged in the local and remote computer-readable storage medium including memory device.
Finally, also it should be noted that, in this article, relational terms such as the first and second grades is only used for an entity or operation to separate with another entity or operating space, and not necessarily requires or imply and between these entities or operation, have the relation of any this reality or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thereby the process, method, commodity or the equipment that make to comprise a series of key elements not only comprise those key elements, but also comprise other key elements of clearly not listing, or be also included as the intrinsic key element of this process, method, commodity or equipment.The in the situation that of more restrictions not, the key element being limited by statement " comprising ... ", and be not precluded within process, method, commodity or the equipment that comprises described key element and also have other identical element.
Above to one provided by the present invention.。, be described in detail, to apply specific case herein principle of the present invention and execution mode have been set forth, the explanation of above embodiment is just for helping to understand method of the present invention and core concept thereof; , for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention meanwhile.
Claims (14)
1. a method for synchronizing time, is characterized in that, comprises the following steps: the default address of M time server and the time server number N of continuous synchronization, and described M, N are natural number, and M >=N >=2; Initiate time synchronized request to N time server continuously by described address, a described N time server is chosen from high to low according to pre-setting priority from a described M time server; Receiving returning results of a described N time server, return results whether comprise at least one temporal information described in judgement, is if so, synchronously one of them temporal information by system time; Otherwise, finish this time synchronized.
2. method according to claim 1, is characterized in that: after the returning results of the described N of a described reception time server, judge whether returning results of receiving is temporal information, is the priority that improves corresponding time server.
3. method according to claim 1 and 2, it is characterized in that: return results while comprising at least one temporal information when described, whether the temporal information that judges current reception is the temporal information arriving at first, in this way, is synchronously the temporal information of current reception by system time; Otherwise ignore the temporal information of current reception.
4. method according to claim 1, is characterized in that: described in return results and also comprise time-out information or return to error message.
5. method according to claim 4, is characterized in that: after the returning results of the described N of a described reception time server, judging that whether returning results of receiving is overtime or while returning to error message for returning, is the priority that reduces corresponding time server.
6. method according to claim 1, is characterized in that: after the returning results of the described N of a described reception time server, judging whether that N time server all returns results, is to return results whether comprise at least one temporal information described in judging; Otherwise continue to wait for until N time server all returns results.
7. method according to claim 1, is characterized in that: after this time synchronized of described end, again initiate time synchronized request to the individual time server of N ' continuously, described N ' is natural number, and N ' >N.
8. a time synchronized communication terminal, is characterized in that, comprising: setting unit, and for the default address of M time server and the time server number N of continuous synchronization, described M, N are natural number, and M >=N >=2; Transmitting element, for initiating time synchronized request to N time server continuously by described address, a described N time server is chosen from high to low according to pre-setting priority from a described M time server; Receiving element, for receiving returning results of a described N time server, returns results whether comprise at least one temporal information described in judgement, is if so, synchronously one of them temporal information by system time; Otherwise, finish this time synchronized.
9. communication terminal according to claim 8, it is characterized in that: described setting unit comprises the first priority adjustment unit, for after the returning results of the described N of a described reception time server, judge whether returning results of receiving is temporal information, is the priority that improves corresponding time server.
10. communication terminal according to claim 8 or claim 9, it is characterized in that: described receiving element comprises the first judging unit, for when described in return results while comprising at least one temporal information, whether the temporal information that judges current reception is the temporal information arriving at first, in this way, be synchronously the temporal information of current reception by system time; Otherwise ignore the temporal information of current reception.
Whether 11. communication terminals according to claim 8, is characterized in that: described receiving element also comprises detecting unit, return results as returning overtime or returning to error message for detection of described.
12. communication terminals according to claim 11, it is characterized in that: described setting unit comprises the second priority adjustment unit, for after the returning results of the described N of a described reception time server, judging that whether returning results of receiving is overtime or while returning to error message for returning, is the priority that reduces corresponding time server.
13. communication terminals according to claim 8, it is characterized in that: described receiving element comprises the second judging unit, for after the returning results of the described N of a described reception time server, judging whether that N time server all returns results, is to return results whether comprise at least one temporal information described in judging; Otherwise continue to wait for until N time server all returns results.
14. communication terminals according to claim 8, it is characterized in that: described receiving element comprises retry unit, for after this time synchronized of described end, described communication terminal is initiated time synchronized request to the individual time server of N ' again continuously, described N ' is natural number, and N ' >N.
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| CN201611012119.6A CN106452648B (en) | 2014-06-26 | 2014-06-26 | A kind of method for synchronizing time 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 |
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| CN107071586A (en) * | 2017-04-06 | 2017-08-18 | 深圳Tcl新技术有限公司 | The system time establishing method and device of television 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 |
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Also Published As
| Publication number | Publication date |
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| CN104052565B (en) | 2017-01-25 |
| CN106452648B (en) | 2019-08-02 |
| CN106452648A (en) | 2017-02-22 |
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