CN101505214A - Method, apparatus and system for time synchronization - Google Patents

Method, apparatus and system for time synchronization Download PDF

Info

Publication number
CN101505214A
CN101505214A CNA2009101270312A CN200910127031A CN101505214A CN 101505214 A CN101505214 A CN 101505214A CN A2009101270312 A CNA2009101270312 A CN A2009101270312A CN 200910127031 A CN200910127031 A CN 200910127031A CN 101505214 A CN101505214 A CN 101505214A
Authority
CN
China
Prior art keywords
time
node
adjustment
host node
message
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CNA2009101270312A
Other languages
Chinese (zh)
Inventor
陈宏�
原飞
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to CNA2009101270312A priority Critical patent/CN101505214A/en
Publication of CN101505214A publication Critical patent/CN101505214A/en
Priority to PCT/CN2010/070966 priority patent/WO2010102565A1/en
Pending legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)

Abstract

The embodiment of the invention discloses a method, a device and a system for time synchronization, relates to the communication field, and can ensure that a slave node can quickly achieve time synchronization with a host node when local time of the host node is adjusted. The method for time synchronization comprises the following steps: receiving a time adjustment message transmitted by the host node, wherein the time adjustment message carries time adjustment information and a time adjustment serial number of the host node; and synchronously adjusting the local time of the slave node according to the time adjustment information and the time adjustment serial number. The other method for time synchronization comprises the following steps: detecting that whether the local time of the host node is adjusted or not; and sending the time adjustment message to the slave node when adjustment occurrence of the local time of the host node is detected. The time adjustment message carries the time adjustment information and the time adjustment serial number of the host node.

Description

The methods, devices and systems of time synchronized
Technical field
The present invention relates to wireless communication field, relate in particular to a kind of methods, devices and systems of time synchronized.
Background technology
Along with the development of wireless 3G (3rd Generation, third generation digital communication), frequency and phase locked demand seem more and more urgent between the base station.In order to realize mobile bearer network time synchronized end to end, the IEEE1588 standard is introduced the communications field, by definition PTP 1588 (Precision Time Protocol, precision time protocol) message, realizes the nano level time precision of single node.In network coverage, the inbound port of each network equipment, outbound port add the time stamp that enters and leave the described network equipment time to PTP 1588 messages, realize the time synchronized between the base station.
The method for synchronizing time of prior art comprises: in Fixed Time Interval, host node sends the time stamp sync message to from node, sends the response message of described time stamp sync message from node.After host node received described response message, the host node transmission was carried the feedback message of described response message time of reception extremely from node.From node the time stab information of described time stamp sync message, response message and feedback message is sent to clock chip outside the sheet, calculate the time adjustment amount of current host node.If the time adjustment amount of the time adjustment amount of current host node and host node before is unequal, determine that the time of host node changes, then, adjust local zone time from node according to the time adjustment amount of current host node.
State in the time synchronization process in realization, the inventor finds that there are the following problems at least in the prior art: receiving the time stamp sync message from node at every turn, by obtaining the time adjustment amount of host node, need to judge whether the local zone time of adjustment from node, calculation of complex height and system resources consumption are big, simultaneously in lock in time of calculating host node in the adjustment amount process, by carrying out information interaction with host node, determine the time adjustment amount of host node, increased the transmission time of interactive information at transmission link, prolonged the acquisition time of time adjustment amount, cause from node can not be in time and host node reach time synchronized.
Summary of the invention
The method of the time synchronized that embodiments of the invention provide, device and communication system are can rapid adjustment simple from the lock in time and the implementation method of node.
A kind of method of time synchronized comprises:
Receive the time adjustment message that host node sends, the described time is adjusted time adjustment information and the time adjustment sequence number that message carries host node;
Adjust sequence number according to described time adjustment information and time, adjust local zone time synchronously from node.
A kind of device of time synchronized comprises:
Acquisition module is used to receive the time adjustment message that host node sends, and the described time is adjusted time adjustment information and the time adjustment sequence number that message carries host node;
Adjusting module is used for adjusting sequence number according to described time adjustment information and time, adjusts the local zone time from node synchronously.
A kind of method of time synchronized comprises:
Whether the local zone time that detects host node has adjustment;
After the local zone time that detects described host node was adjusted, to adjusting message from the node transmitting time, the described time was adjusted time adjustment information and the time adjustment sequence number that message carries host node.
A kind of device of time synchronized comprises:
Detection module, whether the local zone time that is used to detect host node has adjustment;
Sending module is used for after the local zone time that described detection module detects described host node is adjusted, and to adjusting message from the node transmitting time, the described time is adjusted time adjustment information and the time that message carries host node and adjusts sequence number.
A kind of communication system comprises: host node and at least one be from node,
Described host node is used for after the local zone time that detects described host node is adjusted, and adjusts message to described from the node transmitting time, and the described time is adjusted time adjustment information and the time adjustment sequence number that message carries host node;
Described from node, be used to receive the time adjustment message that described host node sends, adjust the local zone time of sequence number synchronization adjustment according to described time adjustment information and time from node.
The methods, devices and systems of the time synchronized that the embodiment of the invention provides, when the local zone time of host node is adjusted, notice is from node local zone time adjusted, shortening is judged the time whether local zone time of host node is adjusted from node, make from node fast to reach time synchronized, thereby realize the synchronous in real time of each node in the network with host node.Adjust if host node takes place repeatedly by the time, allow by time adjustment sequence number and can distinguish repeatedly adjustment from node.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
The flow chart of the method for a kind of time synchronized that Fig. 1 provides for the embodiment of the invention;
The flow chart of the method for the another kind of time synchronized that Fig. 2 provides for the embodiment of the invention;
The flow chart of the method for the time synchronized that Fig. 3 provides for another embodiment of the present invention;
Fig. 4 a is the flow chart of S304 among Fig. 3;
Fig. 4 b is for living the message interaction schematic diagram from node before and after the adjustment of host node time;
The structural representation of the device of a kind of time synchronized that Fig. 5 provides for the embodiment of the invention;
Fig. 6 is the structural representation of adjusting module among Fig. 5;
The structural representation of the device of the another kind of time synchronized that Fig. 7 provides for the embodiment of the invention;
Figure 8 shows that the structural representation of the communication system that the embodiment of the invention provides.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
Below in conjunction with specific embodiments and the drawings the present invention is further explained.
As shown in Figure 1, the embodiment of the invention provides a kind of method of time synchronized, comprising:
The time that S101, reception host node send is adjusted message, and the described time is adjusted time adjustment information and the time adjustment sequence number that message carries host node;
S102, adjust sequence number according to described time adjustment information and time, adjust local zone time synchronously from node.
As shown in Figure 2, the embodiment of the invention provides a kind of method of time synchronized, comprising:
Whether the local zone time of S201, detection host node has adjustment;
S202, after the local zone time that detects described host node is adjusted, to adjusting message from the node transmitting time, the described time is adjusted time adjustment information and the time that message carries host node and adjusts sequence number.
The method of the time synchronized that the embodiment of the invention provides, when the local zone time of host node is adjusted, notice is from node local zone time adjusted, shortening is judged the time whether local zone time of host node is adjusted from node, make from node fast to reach time synchronized, thereby realize the synchronous in real time of each node in the network with host node.Can distinguish the repeatedly time of host node adjusts by time adjustment sequence number.
The method for synchronizing time that the embodiment of the invention is provided describes in detail below:
As shown in Figure 3, the method for synchronizing time that another embodiment of the present invention provides, process comprises:
Whether S301, host node detection local zone time have adjustment;
Concrete, judge in the prior art that the method for whether adjusting local lock in time all is applicable to this step, repeats no more herein.For example, whether the variation that detects local lock in time is even, and promptly in Fixed Time Interval, whether the numerical value that change local lock in time equate, if equate, then to from node transmitting time sync message; If when not waiting, then carry out S302.
S302, host node are to adjusting message from the node transmitting time, and the described time is adjusted time adjustment information and the time adjustment sequence number that message carries host node;
Concrete, host node sends described time adjustment information and time adjustment sequence number can have various ways, and for example the form with message sends the time adjustment information.Such as adding the time adjustment information in the not use field of existing message, transmission is carried the existing message of time adjustment information extremely from node, and this existing message can be the time synchronized message, and the described field of not using can be reserved field or extended field; Perhaps, also can in newly-increased message, add described time adjustment information, directly send the described interpolation message of time adjustment information that carries extremely from node.
In embodiments of the present invention, the described interpolation message that carries the time adjustment information is called time adjustment message, is used for notice and adjusts from the node local zone time.It can be event message that the described time is adjusted message, goes into physical port and will write down current information of time.Message format can see table:
Table 1 time is adjusted the message format of message
Described time is adjusted the prior art that is set to of transportSpecific, reserved in the message, versionPTP, messageLength, domainNumber, flags, sourcePortIdentity, control, logMeanMessageInterval, and repeats no more herein.The following field that the described time is adjusted in the message is done to introduce below:
MessageType is for can distribute type field, and the numerical value that carries is 0x5;
OriginTimestamp, correctionField add the territory for the outlet time, carrying host node sends described time and adjusts time of message, wherein the originTimestamp field is added the second of time and the integer part of nanosecond, the fractional part of correctionField field nanosecond in the interpolation time;
AdjustOffset is the time adjusting range, and the span of the numerical value of filling is in 0～48bit 32bit second nanosecond;
Group_sequenceId adjusts the sequence number territory time, and record triggers the number of times that host node sends described time adjustment message;
Single_sequenceId is that message sends sequence number, and is recorded in the single adjustment during lock in time, sends the number of times of described time adjustment message.
S303, receive the time that host node sends from node and adjust message;
Concrete, when the time that receives is adjusted message, determine that the local zone time of host node is adjusted, then, carry out S304 to adjusting the lock in time of this locality.
S304, adjust the message adjustment from the node local zone time according to described time, shown in Fig. 4 a, step S304 specifically can comprise:
S3041, obtain the time adjustment amount of host node;
Concrete, obtain the transmitting time and the time of reception of described time adjustment message, and send the response message of described time adjustment message simultaneously, and write down the transmitting time of described response message.Receive the feedback message of described response message, carry the time of reception of described response message in the described feedback message.Transmission, the time of reception of described time being adjusted transmission, time of reception and the described response message of message from node sends to the clock chip outside the sheet, calculates current time adjustment amount.
Host node also can directly send the time adjustment amount of host node when transmitting time is adjusted message.Therefore, adjust time during adjustment amount that comprises host node in the message, can adjust the time adjustment amount that directly extracts described host node the message from the time when described time.For example, adjust AdjustOffset field the message, obtain the time adjustment amount of host node from described time stamp.
Adjust the time adjustment amount that carries host node in the message in the time, make the time adjustment amount that directly from described time adjustment message, obtains host node from node, shortened from the time of node adjustment amount computing time, accelerated to adjust synchronously the speed of local zone time, improved accuracy from node time from node.
S3042, according to the time adjustment amount of described host node, determine that local frequency adjusts the factor;
Be depicted as the host node time as Fig. 4 b and live message interaction schematic diagram before and after adjusting, adjust the message from the time that current host node sends, obtain the transmitting time T1 that the current time adjusts message t_adjust from node N+1With time of reception T2 N+1, and from receiving in the time interval between current time adjustment message and the last time adjustment message, choose any one time synchronized message Sync, and obtain the transmitting time T1 of described time synchronized message nWith time of reception T2 nThe described frequency of the time adjustment amount substitution formula (1) of above-mentioned time and described host node is adjusted the factor β = T 1 n + 1 - T 1 n - T a T 2 n + 1 - T 2 n - - - ( 1 )
Obtain current frequency by above-mentioned formula (1) and adjust factor-beta from node.
When the described frequency of calculating is adjusted the factor, the transmitting time that to adjust message the time deducts the time adjustment amount of host node, the calculating parameter that makes frequency adjust the factor is the parameter before the time is adjusted, and has guaranteed the accuracy of the frequency adjustment factor, improves the precision that frequency is adjusted the factor.
Frequency after S3043, basis are determined is adjusted the factor, adjusts local clock frequency;
Concrete, according to the magnitude relationship of frequency adjustment factor-beta and 1.Adjustment is from the clock frequency of node.If β=1, expression equals the clock frequency of host node from the clock frequency of node, does not need to adjust the clock frequency from node; If β〉1, expression is from the clock frequency of the node clock frequency less than host node, then increase the voltage of voltage-controlled oscillator (VCO) from the phase-locked loop of nodal clock, raising is from the clock frequency of node, make the clock frequency that equals host node from the clock frequency of node, reach main and subordinate node clock frequency synchronously; Otherwise, reduce the voltage of voltage-controlled oscillator (VCO), reduce clock frequency from node.
S3044, under adjusted clock frequency, the time adjustment amount of described host node is increased to local zone time.
Concrete, under the condition that the clock frequency of main and subordinate node equates, the time adjustment amount of described host node is increased to local zone time, finish main and subordinate node time synchronously.
Adjust if host node has carried out twice time, can distinguish above-mentioned at least twice time from node and adjust for making, host node needs in described time adjustment information the interpolation time to adjust sequence number, is used to indicate the order of the adjustment time of host node.When receive the different time adjustment information of at least two sequence numbers from node after, then adjust the order of sequence number according to the described time, local zone time is adjusted.
For example, in Fixed Time Interval, the time of host node is adjusted to t1+ α from t1, adjust to t1+ β from t1+ α again, then host node need send time adjustment message twice, and carries sequence number in described time adjustment message, is used to indicate the order from node processing time adjustment information.Concrete, number be that example describes to adjust the continuous sequence of adding in the message from small to large in the time.When adjusting to t1+ α in the host node time, adding sequence number in time adjustment message is n, wherein n〉0; And when the time of host node was adjusted to t1+ β, then adding sequence number in time adjustment message was n+1.If described time is adjusted time that message comprises host node during adjustment amount, be to adjust time of n that to add the host node adjustment amount in the message be α then at sequence number, be that time of n+1 to adjust the adjustment amount that adds host node in the message be β-α at sequence number.
After host node receives above-mentioned two times adjustment message,, determine to adjust synchronously the order of local zone time according to the sequence number in above-mentioned two times adjustment message.According to the adjustment order of determining,, adjust local zone time synchronously from node according to described time adjustment sequence number time corresponding adjustment information; After finishing when the preamble adjustment, adjust message according to the next time again, adjust local zone time synchronously from node.
For example, receiving the time adjustment message that sequence number is n and n+1 from node, determine that the order of adjustment local zone time is a sequence number order from small to large, is the time adjustment message of n according to described sequence number then, adjusts local zone time synchronously.After adjusting end, be the time adjustment message of n+1 according to described sequence number again, adjust local zone time synchronously.
Further, for avoiding time adjustment message dropping in the transmission course, host node can send at least two times adjustment messages after detecting the local zone time adjustment, and described at least two times are adjusted message and carry identical time adjustment sequence number.When receiving from node after at least two times adjust the identical information of sequence number, determine that described at least two times adjust the notification message of message for adjusting with time.Can also monitor described whether identical with the time adjustment amount that carries in the notification message, if not simultaneously, can send the request of re-transmission time adjustment message to host node,, determine described sequence number time corresponding adjustment amount according to the time adjustment message that host node retransmits.
The method of the time synchronized that the embodiment of the invention provides, when the local zone time of host node is adjusted, notice is from node local zone time adjusted, shortening is judged the time whether local zone time of host node is adjusted from node, make from node fast to reach time synchronized, thereby realize the synchronous in real time of each node in the network with host node.
As shown in Figure 5, the device of a kind of time synchronized that the embodiment of the invention provides comprises:
Acquisition module 501 is used to receive the time adjustment message that host node sends, and the described time is adjusted time adjustment information and the time adjustment sequence number that message carries host node;
Adjusting module 502 is used for adjusting sequence number according to described time adjustment information and time, adjusts the local zone time from node synchronously.
Described adjusting module 502 also is used for adjusting according to the described time time adjustment sequence number of message, determines to adjust the order of local zone time; According to the adjustment order of determining,, adjust local zone time synchronously from node according to described time adjustment sequence number time corresponding adjustment information; After finishing when the preamble adjustment, adjust message according to the next time again, adjust local zone time synchronously from node.
As shown in Figure 6, described time adjustment information comprises the time adjustment amount of host node, and described adjusting module 502 may further include:
Obtain submodule 601, be used for obtaining the time adjustment amount of described host node from described adjustment message;
Frequency is adjusted submodule 602, is used for according to described local zone time adjustment amount, adjusts local clock frequency;
Time is adjusted submodule 603, is used under adjusted clock frequency, and the time adjustment amount of described host node is increased to local zone time.
As shown in Figure 7, the embodiment of the invention also provides a kind of device of adjusting lock in time, comprising:
Detection module 701, whether the local zone time that is used to detect host node has adjustment;
Sending module 702 is used for after the local zone time that described detection module detects described host node is adjusted, and to adjusting message from the node transmitting time, the described time is adjusted time adjustment information and the time that message carries host node and adjusts sequence number.
Optionally, described sending module 702 is used for sending continuously a plurality of described times from node and adjusting messages to described, and it is identical that time of adjusting messages a plurality of times that send is continuously adjusted sequence number.
The device of the time synchronized that the embodiment of the invention provides, when the local zone time of host node is adjusted, notice is from node local zone time adjusted, shortening is judged the time whether local zone time of host node is adjusted from node, make from node fast to reach time synchronized, thereby realize the synchronous in real time of each node in the network with host node.
As shown in Figure 8, the communication system that the embodiment of the invention provides comprises:
Host node 801, whether the local zone time that is used to detect host node has adjustment; After the local zone time that detects described host node is adjusted, adjust message to described from the node transmitting time, the described time is adjusted time adjustment information and the time adjustment sequence number that message carries host node.The structure of this host node can repeat no more with reference to associated description embodiment illustrated in fig. 7 herein.
At least one is used to receive the time adjustment message that host node sends from node 802, adjusts the local zone time of sequence number synchronization adjustment from node according to described time adjustment information and time.Should can repeat no more with reference to the associated description of figure 5 to 6 illustrated embodiments from the structure of node herein.
The communication system that the embodiment of the invention provides, when the local zone time of host node is adjusted, notice is from node local zone time adjusted, shortening is judged the time whether local zone time of host node is adjusted from node, make from node fast to reach time synchronized, thereby realize the synchronous in real time of each node in the network with host node.
One of ordinary skill in the art will appreciate that and realize that all or part of step that the foregoing description method is carried is to instruct relevant hardware to finish by program, described program can be stored in a kind of computer-readable recording medium, this program comprises one of step or its combination of method embodiment when carrying out.
In addition, each functional unit in each embodiment of the present invention can be integrated in the processing module, also can be that the independent physics in each unit exists, and also can be integrated in the module two or more unit.Above-mentioned integrated module both can adopt the form of hardware to realize, also can adopt the form of software function module to realize.If described integrated module realizes with the form of software function module and during as independently production marketing or use, also can be stored in the computer read/write memory medium.
The above-mentioned storage medium of mentioning can be a read-only memory, disk or CD etc.
The above; only be the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.

Claims (14)

1, a kind of method for synchronizing time is characterized in that, comprising:
Receive the time adjustment message that host node sends, the described time is adjusted time adjustment information and the time adjustment sequence number that message carries host node;
Adjust sequence number according to described time adjustment information and time, adjust local zone time synchronously from node.
2, method for synchronizing time according to claim 1 is characterized in that, described according to described time adjustment information and time adjustment sequence number, adjustment synchronously comprises from the step of the local zone time of node:
According to the time adjustment sequence number in the described time adjustment message, determine to adjust the order of local zone time;
According to the adjustment order of determining,, adjust local zone time synchronously from node according to described time adjustment sequence number time corresponding adjustment information; After finishing when the preamble adjustment, adjust message according to the next time again, adjust local zone time synchronously from node.
3, method for synchronizing time according to claim 1 and 2, it is characterized in that, the time adjustment amount that described time adjustment information is a host node, described according to the time adjustment information, adjust synchronously and comprise: described time adjustment amount is increased to local zone time from node from the local zone time of node.
4, method for synchronizing time according to claim 3 is characterized in that, adjusts synchronously also to comprise before the local zone time of node:
According to the time adjustment amount of described host node, determine the local frequency adjustment factor,
β = T 1 n + 1 - T 1 n - T a T 2 n + 1 - T 2 n ,
Wherein β is that local frequency is adjusted the factor, T1 n, T2 nBefore being respectively the adjustment of host node time, the time of transmission and time of reception sync message, T1 N+1, T2 N+1After being respectively the adjustment of host node time, the time of transmission and time of reception adjustment information, T aTime adjustment amount for host node;
Equal 1 if described local frequency is adjusted the factor, then do not adjust clock frequency from node; If described local frequency is adjusted the factor greater than 1, improve clock frequency from node; Otherwise, reduce clock frequency from node.
5, a kind of method for synchronizing time is characterized in that, comprising:
Whether the local zone time that detects host node has adjustment;
After the local zone time that detects described host node was adjusted, to adjusting message from the node transmitting time, the described time was adjusted time adjustment information and the time adjustment sequence number that message carries host node.
6, method for synchronizing time according to claim 5 is characterized in that, it is predefined event message that the described time is adjusted message.
7, according to the method for claim 5 or 6 described time synchronized, it is characterized in that, after the local zone time that detects described host node was adjusted, from a plurality of described times adjustment messages of the continuous transmission of node, the time adjustment sequence number of a plurality of times adjustment messages that send continuously was identical to described.
8, a kind of device of time synchronized is characterized in that, comprising:
Acquisition module is used to receive the time adjustment message that host node sends, and the described time is adjusted time adjustment information and the time adjustment sequence number that message carries host node;
Adjusting module is used for adjusting sequence number according to described time adjustment information and time, adjusts the local zone time from node synchronously.
9, the device of time synchronized according to claim 8 is characterized in that, described adjusting module is used for adjusting according to the described time time adjustment sequence number of message, determines to adjust the order of local zone time; According to the adjustment order of determining,, adjust local zone time synchronously from node according to described time adjustment sequence number time corresponding adjustment information; After finishing when the preamble adjustment, adjust message according to the next time again, adjust local zone time synchronously from node.
10, the device of adjusting lock in time according to claim 8 is characterized in that described time adjustment information comprises the time adjustment amount of host node, and described adjusting module comprises:
Obtain submodule, be used for obtaining the time adjustment amount of described host node from described adjustment message;
Frequency is adjusted submodule, is used for the time adjustment amount according to described host node, adjusts local clock frequency;
Time is adjusted submodule, is used under adjusted clock frequency, and the time adjustment amount of described host node is increased to local zone time.
11, a kind of device of time synchronized is characterized in that, comprising:
Detection module, whether the local zone time that is used to detect host node has adjustment;
Sending module is used for after the local zone time that described detection module detects described host node is adjusted, and to adjusting message from the node transmitting time, the described time is adjusted time adjustment information and the time that message carries host node and adjusts sequence number.
12, the device of time synchronized according to claim 11 is characterized in that, described sending module is used for sending continuously a plurality of described times from node and adjusting messages to described, and it is identical that time of adjusting messages a plurality of times that send is continuously adjusted sequence number.
13, a kind of communication system is characterized in that, comprising: host node and at least one be from node,
Described host node is used for after the local zone time that detects described host node is adjusted, and adjusts message to described from the node transmitting time, and the described time is adjusted time adjustment information and the time adjustment sequence number that message carries host node;
Described from node, be used to receive the time adjustment message that described host node sends, adjust the local zone time of sequence number synchronization adjustment according to described time adjustment information and time from node.
14, communication system according to claim 13 is characterized in that, the time adjustment amount that described time adjustment information is a host node.
CNA2009101270312A 2009-03-10 2009-03-10 Method, apparatus and system for time synchronization Pending CN101505214A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CNA2009101270312A CN101505214A (en) 2009-03-10 2009-03-10 Method, apparatus and system for time synchronization
PCT/CN2010/070966 WO2010102565A1 (en) 2009-03-10 2010-03-10 Method, apparatus and system for time synchronization

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNA2009101270312A CN101505214A (en) 2009-03-10 2009-03-10 Method, apparatus and system for time synchronization

Publications (1)

Publication Number Publication Date
CN101505214A true CN101505214A (en) 2009-08-12

Family

ID=40977299

Family Applications (1)

Application Number Title Priority Date Filing Date
CNA2009101270312A Pending CN101505214A (en) 2009-03-10 2009-03-10 Method, apparatus and system for time synchronization

Country Status (2)

Country Link
CN (1) CN101505214A (en)
WO (1) WO2010102565A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010102565A1 (en) * 2009-03-10 2010-09-16 华为技术有限公司 Method, apparatus and system for time synchronization
WO2015089848A1 (en) * 2013-12-20 2015-06-25 华为技术有限公司 Precision time protocol synchronization method and node
CN104917580A (en) * 2014-03-14 2015-09-16 华为技术有限公司 Clock synchronization detection method, device and system
CN111867039A (en) * 2019-04-29 2020-10-30 华为技术有限公司 TA (timing advance) determination method and device of terminal equipment
CN116939873A (en) * 2023-08-11 2023-10-24 北京云智软通信息技术有限公司 Random access method, timing adjustment method, base station and equipment

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111224885B (en) * 2020-01-07 2023-05-26 联合汽车电子有限公司 Node order marking method, node order marking system and vehicle-mounted keyless system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101197280B1 (en) * 2005-07-15 2012-11-05 삼성전자주식회사 Time synchronizing method and apparatus based on time stamp
CN1925386A (en) * 2006-09-30 2007-03-07 杭州华为三康技术有限公司 Clock synchronizing method and first part and second part using this method
CN101247168B (en) * 2007-02-15 2012-04-25 华为技术有限公司 Time synchronization method and system
CN101505214A (en) * 2009-03-10 2009-08-12 华为技术有限公司 Method, apparatus and system for time synchronization

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010102565A1 (en) * 2009-03-10 2010-09-16 华为技术有限公司 Method, apparatus and system for time synchronization
WO2015089848A1 (en) * 2013-12-20 2015-06-25 华为技术有限公司 Precision time protocol synchronization method and node
CN105027489A (en) * 2013-12-20 2015-11-04 华为技术有限公司 Precision time protocol synchronization method and node
CN105027489B (en) * 2013-12-20 2018-08-21 华为技术有限公司 Precision clock protocol synchronization method and node
CN104917580A (en) * 2014-03-14 2015-09-16 华为技术有限公司 Clock synchronization detection method, device and system
CN104917580B (en) * 2014-03-14 2017-12-15 华为技术有限公司 It is a kind of to detect the synchronous method, apparatus and system of clock
CN111867039A (en) * 2019-04-29 2020-10-30 华为技术有限公司 TA (timing advance) determination method and device of terminal equipment
CN111867039B (en) * 2019-04-29 2021-12-10 华为技术有限公司 TA (timing advance) determination method and device of terminal equipment
US11985697B2 (en) 2019-04-29 2024-05-14 Huawei Technologies Co., Ltd. Timing advance (TA) determining method and apparatus for terminal device
CN116939873A (en) * 2023-08-11 2023-10-24 北京云智软通信息技术有限公司 Random access method, timing adjustment method, base station and equipment
CN116939873B (en) * 2023-08-11 2024-05-07 北京云智软通信息技术有限公司 Random access method, timing adjustment method, base station and equipment

Also Published As

Publication number Publication date
WO2010102565A1 (en) 2010-09-16

Similar Documents

Publication Publication Date Title
RU2489801C2 (en) System for synchronising clock pulses
EP1256197B1 (en) Reference time distribution over a network
US7586896B2 (en) System for maintaining synchronization between multiple asynchronous communication links
CN101505214A (en) Method, apparatus and system for time synchronization
CN102457371B (en) Time synchronization method and related equipment and system
CN103905135B (en) Realize the method, apparatus and system of time synchronized
CN103916950A (en) Time synchronization method and system
CN101729127A (en) Time synchronization node and method thereof
CN103563287B (en) Synchronization device and synchronization method
JP6132734B2 (en) Time synchronization system and apparatus
CN101444042A (en) WLAN fast join
CN103188064A (en) Clock synchronization method and clock synchronization device
CN105376043B (en) A kind of method for synchronizing time of double board systems
CN100581094C (en) Network clock synchronizing method for short distance radio communication network
CN104836654B (en) A kind of clock synchronizing method based on Ethernet POWERLINK
CN108736999A (en) A kind of method for synchronizing time and device
CN103516504A (en) Network node clock synchronization method, nodes and system
CN107872872A (en) A kind of networking synchronous method of Wireless MESH network
CN104780602A (en) Clock self-synchronizing method in wireless communication network
WO2020030062A1 (en) Communication method and apparatus
JP2018088644A (en) Time synchronization method and time synchronization system between wirelessly-connected terminals
CN203722758U (en) Synchronizer for distributed video system
CN103124429B (en) Be synchronized to the method and apparatus of non-master standard service carrying channel
CN101682404B (en) Method and device for selecting and transmitting variable frame formats
CN103597887A (en) Synchronization method, device and system

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C12 Rejection of a patent application after its publication
RJ01 Rejection of invention patent application after publication

Open date: 20090812