CN101512955A - Method and apparatus for synchronizing applications of terminals in a communication network - Google Patents
Method and apparatus for synchronizing applications of terminals in a communication network Download PDFInfo
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- CN101512955A CN101512955A CNA2007800335041A CN200780033504A CN101512955A CN 101512955 A CN101512955 A CN 101512955A CN A2007800335041 A CNA2007800335041 A CN A2007800335041A CN 200780033504 A CN200780033504 A CN 200780033504A CN 101512955 A CN101512955 A CN 101512955A
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- temporal information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1095—Replication or mirroring of data, e.g. scheduling or transport for data synchronisation between network nodes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/16—Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
- H04L69/161—Implementation details of TCP/IP or UDP/IP stack architecture; Specification of modified or new header fields
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/30—Definitions, standards or architectural aspects of layered protocol stacks
- H04L69/32—Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
- H04L69/321—Interlayer communication protocols or service data unit [SDU] definitions; Interfaces between layers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L7/00—Arrangements for synchronising receiver with transmitter
- H04L7/02—Speed or phase control by the received code signals, the signals containing no special synchronisation information
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Computer Security & Cryptography (AREA)
- Mobile Radio Communication Systems (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
- Small-Scale Networks (AREA)
Abstract
A method and apparatus for synchronizing applications of network terminals are provided. Time information, which is synchronized and managed with other terminals for controlling use of media in the network in a media access control (MAC) layer, is transmitted to an application layer so as to directly execute the application using a synchronization interface. Accordingly, it is possible to synchronize applications without exchanging packets for obtaining synchronization information of terminals using a TCP/IP protocol.
Description
Technical field
The method and apparatus consistent with the present invention relates to time synchronized, more particularly, relates to the application of synchronizing network terminal.
Background technology
Send various types of data by communication network.Specifically, when the data flow of for example audio/video (AV) be sent out/when receiving, the time synchronized between transmitter and the receiver is extremely important, and transmitter and receiver use various algorithms to attempt synchronously when exchange comprises the bag of temporal information.
Fig. 1 is the concept map of art methods that is used to explain the application of synchronizing network terminal.
As shown in Figure 1, in the prior art, proprietary application or use in functional module be used to time synchronized between two or more terminals that are connected to network.There is the whole bag of tricks that is used for time synchronized.For example, the application of transmitter-side terminal produces and comprises the bag of temporal information and this bag is sent to receiver side's terminal that receiver side's terminal receives this bag.In this case, receiver side's terminal is calculated the precise time of transmitter-side terminal based on the processing delay of the processing delay of transmitter-side terminal and Internet communication delay and receiver side, subsequently synchronously should the time with transmitter-side terminal.Perhaps, the application of transmitter-side terminal will comprise that the bag of temporal information sends to receiver side's terminal.Subsequently, receiver side's terminal receives bag and respond packet is sent to transmitter-side terminal.Handle by the repeating frame exchange, the accurate timing of transmitter-side terminal and receiver side's terminal is calculated based on processing delay, Internet communication delay etc., and with synchronous with the reference time, thereby the deadline is synchronous.
In the prior art, the synchronous the whole bag of tricks of life period.In all methods, in application, carry out synchronously with time synchronized function.Yet network interface is provided for synchronously or the path of " processing delay " information, but it does not directly carry out any Synchronous Processing.
In other words, synchronous for the terminal and the other-end that will be connected to network in many cases, need transmission control protocol/Internet protocol (TCP/IP) protocol stack and synchronization dedicated application or use in be used for the functional module of time synchronized.
Yet, comprising consumer electronics (CE) the product needed high-end system of the low price of this function, this causes that price increases.And the network terminal should exchange additional packets and packet is synchronous with the time of implementation, thereby offered load increases.
Summary of the invention
Technical problem
The invention provides a kind ofly, come the method and apparatus of synchronous applications and need not between the network terminal exchange packets based on the information of in medium access control (MAC) layer, before having obtained.
Beneficial effect
According to the present invention, can be by will be basically offering the upper strata by the temporal information of the network interface layer-management of terminal, and need not to use the independent functional module that is used for time synchronized realizes using synchronously.In addition, do not need to be used for the individual processing of synchronous bag swap time, thereby reduced offered load.
Therefore, network does not need the ICP/IP protocol stack or is used for the application of time synchronized, and can shorten the required time of product development and reduce cost.
Description of drawings
Fig. 1 is the concept map of art methods that is used to explain the application of synchronizing network terminal;
Fig. 2 is used to explain the concept map of the method for the application of synchronizing network terminal according to an exemplary embodiment of the present invention;
Fig. 3 is the flow chart of the processing of the application of synchronizing network terminal according to an exemplary embodiment of the present invention;
Fig. 4 shows the diagrammatic sketch of handling the structure of the network terminal of using according to an exemplary embodiment of the present invention.
Preferred forms
According to an aspect of the present invention, provide the method for the application in the terminal that a kind of execution is connected to network, comprising: application layer is from MAC layer request synchronizing information; The MAC layer offers application layer in response to described request with temporal information, and the other-end in this temporal information and the network uses with the medium that control is used for network synchronously and by management; Application layer is carried out based on temporal information and is used.
Network can be a wireless lan (wlan), and can temporal information be set based on the timestamp field of beacon frame.
In addition, network can be Wireless Personal Network (WPAN), and based on the piconet synchronization parameter field of beacon frame temporal information is set.
In addition, in the step of temporal information was provided, the MAC layer can use Service Access Point (SAP) that temporal information is offered application layer.
In addition, the MAC layer can offer application layer with the result who corrects the timestamp field according to termination property.In addition, the MAC layer will offer application layer according to the result that termination property is corrected piconet synchronization parameter field.In addition, application also can comprise: the MAC layer that will be used for offering according to the information of terminal feature correction temporal information application layer.
According to a further aspect in the invention, provide a kind of computer readable recording medium storing program for performing that records the program of the method for carrying out the application in the terminal that is connected to network.
According to a further aspect in the invention, a kind of MAC of use layer module is provided and uses application layer module to carry out application execution device in the terminal of using that is connected to network, wherein, application layer module request MAC layer module provides synchronizing information, and based on synchronizing information execution application in response to request, and wherein, MAC layer module responds offers application layer in request with temporal information, and temporal information and other-end use with the medium in the Control Network synchronously and by management.
Embodiment
Fig. 2 is used to explain the concept map of the method for the application of synchronizing network terminal according to an exemplary embodiment of the present invention.
As shown in Figure 2, terminal installation 1 and the device 2 that is connected to network passes through to use the network interface time of implementation synchronous.Network interface can be the module as the MAC layer.When being connected to a plurality of terminal working medium of network, the mechanism of granting terminal equality access medium right needs time synchronized.Therefore, the network terminal of the present invention provides the time synchronized function of MAC layer in 1..
For example, be equipped with the time synchronized function according to network as IEEE 802.11 and this standard of IEEE 802.15.3.Terminal is with reference to coming the time of implementation synchronous according to the timestamp field of the beacon frame among the WLAN of IEEE 802.11 standards.On the other hand, terminal comes the time of implementation synchronous with reference to the piconet synchronization parameter field of the beacon frame among the WPAN.
Because the terminal that is connected to network has been carried out the time synchronized of MAC layer, and terminal can use the temporal information of MAC layer to carry out the time synchronized of application, and need not by using the ICP/IP protocol stack to come exchange packets.The network interface of the network terminal according to an exemplary embodiment of the present invention, promptly the MAC layer comprises the time synchronized interface, this time synchronized interface need not directly temporal information to be sent to application layer by any other layer.In other words, application layer can be by 2. acquisition time information of time synchronized interface, and service time, the time synchronized of application of the other-end of network is carried out and be connected to information 3..
Can adopt MAC service access point (SAP) to realize the time synchronized interface.The specific function that application can be called the MAC layer by the network terminal to be provided comes acquisition time information.
Except temporal information, the MAC layer can be provided for correcting the correction information of temporal information.When the temporal information of MAC layer-management is delayed when arriving application owing to processing delay, can not realize precise synchronization.Therefore, the MAC layer can offer application layer with correction information according to system performance.Perhaps, can be provided for obtaining the independent function of correction information with the form of MAC SAP.
Fig. 3 is the flow chart of the processing of the application of synchronizing network terminal according to an exemplary embodiment of the present invention.
In operation 310, application layer is used for the synchronizing information of synchronous applications to the request of MAC layer.As mentioned above, in operation 310, the function that is provided by MAC SAP can be provided application layer.
In operation 320, for the purpose of the medium access control of network, the MAC layer will offer application layer by the temporal information of the terminal management that is connected to network.The network terminal obtains this temporal information based on the timestamp field of the beacon frame among the WLAN and based on the piconet synchronization parameter field of the beacon frame among the WPAN.
As mentioned above, when the MAC layer provides temporal information, can provide correction information simultaneously according to termination property.According to exemplary embodiment, the MAC layer can be corrected temporal information according to termination property, subsequently the result is offered application layer.
In operation 330, application layer acquisition time information and correction information use this correction information to correct this temporal information subsequently.
In operation 340, application layer is carried out application by using the temporal information of correcting.In this processing, be connected to network application can with the application of synchronized of other-end.For example, when use carrying out the function of the transport stream packet that is used to send video data, the temporal information of media access control layer can be used for being provided with the timestamp field of transport stream packet, but this video data of receiving side terminal seamless reproduction subsequently.
Fig. 4 shows the diagrammatic sketch of handling the structure of the network terminal of using according to an exemplary embodiment of the present invention.
As shown in Figure 4, the network terminal 400 according to this exemplary embodiment comprises application layer module 410, MAC layer module 420 and physical layer block 430.
When the request that receives synchronizing information, MAC layer module 420 offers application layer module 410 in response to this request with temporal information, and this temporal information and other-end use with the medium in the Control Network synchronously and by management.
As mentioned above, MAC layer module 420 can provide correction information together with temporal information.In addition, MAC layer module 420 can offer application layer with temporal information after correcting temporal information independently.
Use the beacon frame in the network of WLAN for example or WPAN to wait transmission time information.Physical layer block 430 received beacon frames also send to MAC layer 420 with this beacon frame.
In addition, can the program of using a computer realize the invention described above exemplary embodiment, readable medium recording program performing computer program in general purpose digital computer can use a computer.
Computer readable recording medium storing program for performing comprises storage medium, for example magnetic memory (for example, ROM, floppy disk, hard disk etc.) or optically-readable media (for example, CD-ROM, DVD etc.).
According to an exemplary embodiment of the present, can be by temporal information be offered the upper strata, and need not to use the independent functional module that is used for time synchronized realizes using synchronously, this temporal information is basically by the network interface layer-management of terminal.In addition, do not need to be used to exchange the individual processing of the bag that is used for time synchronized, thereby reduced offered load.
Therefore, network does not need the ICP/IP protocol stack or is used for the application of time synchronized, and can shorten the required time of product development and reduce cost.
Although specifically shown and described the present invention with reference to its exemplary embodiment, but it should be appreciated by those skilled in the art, under the situation that does not break away from the spirit and scope of the present invention that are defined by the claims, can carry out various changes on form and the details to it.
Claims (17)
1, a kind of execution is connected to the method for the application in the terminal of network, and this method comprises:
Application layer is from MAC layer request synchronizing information;
In response to described request temporal information is offered application layer from MAC, this temporal information is used for the medium access control of network by management;
Application layer is carried out based on temporal information and is used.
2, the method for claim 1, wherein network is a WLAN (wireless local area network), and based on the timestamp field value of beacon frame temporal information is set.
3, the method for claim 1, wherein network is a Wireless Personal Network, and based on the piconet synchronization parameter field value of beacon frame temporal information is set.
4, the method for claim 1, wherein in the step of temporal information is provided, the MAC layer uses Service Access Point that temporal information is offered application layer.
5, method as claimed in claim 2, wherein, the MAC layer will offer application layer according to the result that termination property is corrected the timestamp field value.
6, method as claimed in claim 3, wherein, the MAC layer will offer application layer according to the result that termination property is corrected the piconet synchronization parameter field value.
7, the method for claim 1 also comprises: will be used for offering application layer according to the information of terminal feature correction temporal information from the MAC layer.
8, the method for claim 1, wherein use the transport stream packet that generation is used to send video data, and in carrying out the step of using, the timestamp field of transport stream packet is set based on temporal information.
9, a kind of computer readable recording medium storing program for performing that records the program of the method for carrying out the application in the terminal that is connected to network, this method comprises:
Application layer is from MAC layer request synchronizing information;
In response to described request temporal information is offered application layer from MAC, this temporal information is used for the medium access control of network by management;
Application layer is carried out based on temporal information and is used.
10, the application execution device in a kind of terminal that is connected to network, this application execution device comprises:
MAC layer module;
Application layer module is carried out and is used,
Wherein, application layer module request MAC module provides synchronizing information, and carries out application based on the synchronizing information that receives in response to request,
Wherein, MAC layer module responds offers application layer in request with temporal information, and temporal information is used for the medium access control of network by management.
11, application execution device as claimed in claim 10, wherein, network is a WLAN (wireless local area network), and based on the timestamp field value of beacon frame temporal information is set.
12, application execution device as claimed in claim 10, wherein, network is a Wireless Personal Network, and based on the piconet synchronization parameter field value of beacon frame temporal information is set.
13, application execution device as claimed in claim 10, wherein, MAC layer module offers application layer module with the form of Service Access Point with temporal information.
14, application execution device as claimed in claim 11, wherein, MAC layer module will offer application layer module according to the result that termination property is corrected the timestamp field value.
15, application execution device as claimed in claim 12, wherein, MAC layer module will offer application layer module according to the result that termination property is corrected the piconet synchronization parameter field value.
16, application execution device as claimed in claim 10, wherein, the MAC layer will be used for offering application layer module according to the information of termination property correction temporal information.
17, application execution device as claimed in claim 10 wherein, uses and produce the transport stream packet that is used to send video data, and application layer module is provided with the timestamp field of transport stream packet based on temporal information.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020060092458A KR101203529B1 (en) | 2006-09-22 | 2006-09-22 | Method and apparatus for synchronizing applications of terminals in a communication network |
| KR1020060092458 | 2006-09-22 | ||
| KR1020060102482 | 2006-10-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101512955A true CN101512955A (en) | 2009-08-19 |
Family
ID=39414229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007800335041A Pending CN101512955A (en) | 2006-09-22 | 2007-08-30 | Method and apparatus for synchronizing applications of terminals in a communication network |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR101203529B1 (en) |
| CN (1) | CN101512955A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102598557A (en) * | 2009-11-13 | 2012-07-18 | 交互数字专利控股公司 | Control signaling in wireless communications |
| CN105532053A (en) * | 2013-09-27 | 2016-04-27 | 苹果公司 | Device synchronization over bluetooth |
| CN106162861A (en) * | 2011-09-23 | 2016-11-23 | 想象技术有限公司 | Method and apparatus for the time synchronized in wireless network |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU7573500A (en) | 1999-09-01 | 2001-03-26 | Insilicon | Ethernet 10/100 media access controller core |
| KR100498361B1 (en) | 2003-07-18 | 2005-07-01 | 엘지전자 주식회사 | Synchronization method for wireless internet in mobile communication device |
-
2006
- 2006-09-22 KR KR1020060092458A patent/KR101203529B1/en not_active IP Right Cessation
-
2007
- 2007-08-30 CN CNA2007800335041A patent/CN101512955A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| J. MCNEW等: "Dot11 Mlme Tsf Timer Commands，11-06-1542-01-000p-dot11-mlme-tsf-timer-commands", 《IEEE 802.11》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102598557A (en) * | 2009-11-13 | 2012-07-18 | 交互数字专利控股公司 | Control signaling in wireless communications |
| CN106162861A (en) * | 2011-09-23 | 2016-11-23 | 想象技术有限公司 | Method and apparatus for the time synchronized in wireless network |
| US11394524B2 (en) | 2011-09-23 | 2022-07-19 | Imagination Technologies Limited | Method and apparatus for time synchronization in wireless networks |
| US11863656B2 (en) | 2011-09-23 | 2024-01-02 | Imagination Technologies Limited | Method and apparatus for time synchronisation in wireless networks |
| CN105532053A (en) * | 2013-09-27 | 2016-04-27 | 苹果公司 | Device synchronization over bluetooth |
| CN105532053B (en) * | 2013-09-27 | 2019-05-10 | 苹果公司 | It is synchronous that equipment is carried out by bluetooth |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20080027044A (en) | 2008-03-26 |
| KR101203529B1 (en) | 2012-11-21 |
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Application publication date: 20090819 |