CN101741569A - Data synchronization method, data synchronization system, client and server - Google Patents
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Abstract
Description
Technical field
The present invention relates to moving communicating field, particularly a kind of method of data synchronization, system and client, server.
Background technology
Development along with wireless traffic, the personal information of mobile phone terminal stored, calendar information and e-mail messages etc. become more and more important, SyncML (Synchronization Markup Language, synchronization makeup language) agreement can realize the data sync of the mobile phone terminal and the webserver, data in the mobile phone terminal are backuped in the webserver, when the data that the user changes mobile phone or mobile phone terminal stored change, can easily Backup Data be returned in the mobile phone terminal.
The user utilizes the client in the mobile phone terminal to register a PIM (PersonalInformation Manager on the webserver, personal information manager) number of the account, when the data in the mobile phone terminal change, the user can directly utilize client to carry out data sync, makes data in the server and the data in the mobile phone terminal be consistent.
Can generate finger print data according to Data Identification by the fingerprint generating algorithm, finger print data changes along with the change of data, when carrying out data sync, can come check data whether to change by finger print data, also be consistent for its finger print data of data of client and server unanimity.When the data in the mobile phone terminal change, client produces new finger print data, and new finger print data sent to server, server checks whether the finger print data of self storing is consistent with this finger print data, if inconsistent, shows that change has taken place the data in the mobile phone terminal, server just sends request to client, request sends to server with the data in the mobile phone terminal, and server upgrades the data of preserving after the data that receive the client transmission.
But the inventor states in the process in realization, find that prior art has following defective: often include a lot of data item in the mobile phone terminal, but only corresponding one-level finger print data of all data item, even wherein the low volume data item changes, this finger print data also can change, server checks that finger print data and the finger print data after the change that self stores are inconsistent, will require the data item of client with this finger print data correspondence, just all data item of client stores all send over, cause some data item that may not change also will be transmitted, making needs data quantity transmitted bigger, and the efficient of data sync is lower.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of can the minimizing needs data quantity transmitted in the data sync, promote method of data synchronization, system and client, the server of data synchronization efficiency.
For solving the problems of the technologies described above, embodiments of the invention provide technical scheme as follows:
On the one hand, embodiments of the invention provide a kind of method of data synchronization, comprising:
User end to server sends update request, carries local unique identification and two above secondary finger print datas in the described update request;
Described client receives the synchronization request that carries the secondary finger print data that described server returns, and the secondary finger print data that carries in the described synchronization request is and the inconsistent secondary finger print data of the secondary finger print data of described server stores;
The corresponding data item of secondary finger print data that described client is carried in described server transmission and described synchronization request.
Wherein, can also carry the one-level finger print data in the described update request.
Further, described user end to server also comprises before sending update request:
Described client generates the one-level finger print data according to described local unique identification by the fingerprint generating algorithm;
Described client is encoded to two above data item under the described local unique identification, and generates two the above secondary finger print datas corresponding with described data item according to described coding by the fingerprint generating algorithm.
Embodiments of the invention also provide a kind of method of data synchronization, comprising:
Server receives the update request that client sends, and carries local unique identification and two above secondary finger print datas in the described update request;
Described server is compared described two above secondary finger print datas with the secondary finger print data of being stored, the inconsistent secondary finger print data of secondary finger print data that finds out Yu stored;
Described server sends the synchronization request that carries described inconsistent secondary finger print data to described client, and request transmits and the corresponding data item of described inconsistent secondary finger print data.
Wherein, also comprise before the update request that described server reception client sends:
Described server defines the local unique identification of described client and the corresponding relation between the global unique identification, and stores described corresponding relation.
Wherein, described server is compared described two above secondary finger print datas and is comprised with the secondary finger print data of being stored:
Local unique identification that described whois lookup is stored and global unique identification corresponding relation are found out and the corresponding global unique identification of local unique identification that receives;
Described server is compared two received above secondary finger print datas with the secondary finger print data under the described global unique identification.
Further, also carry the one-level finger print data in the described update request, described server also comprises before described two above secondary finger print datas are compared with the secondary finger print data of being stored:
Described server judges that one-level finger print data that carries in the described update request and the one-level finger print data of being stored are inconsistent.
Embodiments of the invention also provide a kind of client, comprising:
Sending module is used for sending update request to server, carries local unique identification and two above secondary finger print datas in the described update request;
Receiver module is used to receive the synchronization request that carries the secondary finger print data that described server returns, and the secondary finger print data that carries in the described synchronization request is and the inconsistent secondary finger print data of the secondary finger print data of described server stores;
Respond module is used for sending the corresponding data item of secondary finger print data of carrying with described synchronization request to described server.
Wherein, described client also comprises:
Coding module is used for two above data item under the described local unique identification are encoded;
Generation module is used for generating two the above secondary finger print datas corresponding with described data item according to described coding by the fingerprint generating algorithm.
Embodiments of the invention also provide a kind of server, comprising:
Receiver module is used to receive the update request that client sends, and carries local unique identification and two above secondary finger print datas in the described update request;
Comparison module, two above secondary finger print datas that are used for described receiver module is received are compared with the secondary finger print data of being stored, the inconsistent secondary finger print data of secondary finger print data that finds out Yu stored;
Processing module is used for sending the synchronization request that carries described inconsistent secondary finger print data to described client, and request transmits and the corresponding data item of described inconsistent secondary finger print data.
Wherein, described server also comprises:
Definition module is used to define the local unique identification of described client and the corresponding relation between the global unique identification;
Memory module is used to store described corresponding relation.
Wherein, described comparison module comprises:
Search submodule, be used to search the local unique identification of described memory module storage and the corresponding relation of global unique identification, find out the corresponding global unique identification of local unique identification that receives with described receiver module;
Comparison sub-module, two above secondary finger print datas that are used for described receiver module is received are compared with the secondary finger print data under the described global unique identification, find out with described global unique identification under the inconsistent secondary finger print data of secondary finger print data.
Embodiments of the invention also provide a kind of data synchronous system, comprising:
Client, be used for sending update request to server, carry local unique identification and two above secondary finger print datas in the described update request, receive the synchronization request that carries the secondary finger print data that described server returns, the secondary finger print data that carries in the described synchronization request is and the inconsistent secondary finger print data of the secondary finger print data of described server stores the corresponding data item of secondary finger print data of carrying in described server transmission and described synchronization request;
Described server, be used to receive the update request that client sends, described two above secondary finger print datas are compared with the secondary finger print data of being stored, the inconsistent secondary finger print data of the secondary finger print data that finds out and stored, send the synchronization request that carries described inconsistent secondary finger print data to described client, request transmits and the corresponding data item of described inconsistent secondary finger print data.
Embodiments of the invention have following beneficial effect:
In the such scheme, server is compared two above secondary finger print datas that client sends with the secondary finger print data of self storing, the inconsistent secondary finger print data of the secondary finger print data of finding out and being stored, and to client transmission synchronization request, request transmits and the corresponding data item of this inconsistent secondary finger print data.By technical scheme provided by the invention, client only need be transferred to server with the corresponding data item of inconsistent secondary finger print data, and do not need all data item all are transferred to server, having reduced needs data quantity transmitted, reaches the purpose that promotes data synchronization efficiency.
Description of drawings
Fig. 1 is the schematic flow sheet of embodiments of the invention method of data synchronization;
Fig. 2 is another schematic flow sheet of embodiments of the invention method of data synchronization;
Fig. 3 is the structural representation of embodiments of the invention client;
Fig. 4 is the structural representation of embodiments of the invention server;
Fig. 5 is the structural representation of embodiments of the invention data synchronous system;
Fig. 6 is the one-level finger print data of embodiments of the invention client and the corresponding relation schematic diagram between the secondary finger print data;
Fig. 7 is the local unique identification of embodiments of the invention server and the corresponding relation schematic diagram between the global unique identification;
Fig. 8 is the one-level finger print data of embodiments of the invention server and the corresponding relation schematic diagram between the secondary finger print data;
Fig. 9 is the schematic flow sheet of the method for data synchronization of system shown in Figure 5.
Embodiment
For technical problem, technical scheme and advantage that embodiments of the invention will be solved is clearer, be described in detail below in conjunction with the accompanying drawings and the specific embodiments.
Embodiments of the invention are in the available data simultaneous techniques, need data quantity transmitted bigger, the problem that the efficient of data sync is lower, provide a kind of can the minimizing to need data quantity transmitted in the data sync, promote method of data synchronization, system and client, the server of data synchronization efficiency.
As shown in Figure 1, the embodiments of the invention method of data synchronization comprises:
The synchronization request that carries the secondary finger print data that step 102, client reception server return, the secondary finger print data that carries in this synchronization request is and the inconsistent secondary finger print data of the secondary finger print data of server stores;
The corresponding data item of secondary finger print data of carrying instep 103, user end to server transmission and this synchronization request.
Wherein, can also carry and the corresponding one-level finger print data of this part unique identification in the update request that user end to server sends, the one-level finger print data finger print data that just client generates according to all data item of storage in the prior art, if the one-level finger print data that one-level finger print data that client sends and server are stored is inconsistent, server is compared above-mentioned two above secondary finger print datas with the secondary finger print data of being stored, the inconsistent secondary finger print data of secondary finger print data that finds out Yu stored.If the one-level finger print data that client sends is consistent with the one-level finger print data that server is stored, then server no longer compares the secondary finger print data, adds the workload that the one-level finger print data can reduce server in update request.
Among this embodiment, client is after receiving the synchronization request that carries the secondary finger print data that server returns, only need and to send to server with the corresponding data item of this secondary finger print data, and do not need to transmit all data item, having significantly reduced needs data quantity transmitted, has promoted data synchronization efficiency.
As shown in Figure 2, embodiments of the invention also provide a kind of method of data synchronization, comprising:
Can also carry and the corresponding one-level finger print data of this part unique identification in the update request that the client that server receives sends, if the one-level finger print data that one-level finger print data that client sends and server are stored is inconsistent, server is compared above-mentioned two above secondary finger print datas again with the secondary finger print data of being stored, the inconsistent secondary finger print data of secondary finger print data that finds out Yu stored.If the one-level finger print data that client sends is consistent with the one-level finger print data that server is stored, then server no longer compares the secondary finger print data, and the introduction of one-level finger print data can reduce the workload of server.
Among this embodiment, secondary finger print data that server relatively receives and the secondary finger print data of being stored, the inconsistent secondary finger print data of the secondary finger print data that finds out and stored, and sending the synchronization request carry this inconsistent secondary finger print data to client, request transmits and the corresponding data item of this inconsistent secondary finger print data.In the present embodiment, server just request transmits the data item that changes, and does not need to ask to transmit all data item, and having significantly reduced needs data quantity transmitted, has promoted data synchronization efficiency.
As shown in Figure 3, embodiments of the invention provide a kind of client, comprising:
Sendingmodule 31 is used for sending update request to server, carries local unique identification and two above secondary finger print datas in this update request;
Respondmodule 33 is used for sending the corresponding data item of secondary finger print data of carrying with this synchronization request to server.
Further, this client also comprises:
Wherein,generation module 35 also is used for generating the one-level finger print data according to this part unique identification by the fingerprint generating algorithm, and sendingmodule 31 can also carry and the corresponding one-level finger print data of this part unique identification in the update request that server sends.
Among this embodiment, client is after receiving the synchronization request that carries the secondary finger print data that server returns, only need and to send to server with the corresponding data item of this secondary finger print data, and do not need to transmit all data item, having significantly reduced needs data quantity transmitted, has promoted data synchronization efficiency.
As shown in Figure 4, embodiments of the invention provide a kind of server, comprising:
Further, this server also comprises:
Further,comparison module 42 comprises:
Can also carry in the update request thatreceiver module 41 receives and the corresponding one-level finger print data of this part unique identification,memory module 45 also stores one-level finger print data that should global unique identification,comparison module 42 is compared the one-level finger print data that receives earlier with the one-level finger print data of being stored, when above-mentioned one-level finger print data is inconsistent, secondary finger print data that relatively receives again and the secondary finger print data of being stored.
Wherein, the data item under the local unique identification that client sent beforememory module 45 also stored and the secondary finger print data of corresponding data item, behind the inconsistent secondary finger print data of secondary finger print data thatcomparison sub-module 47 finds out and stored,processing module 43 sends the synchronization request that carries this secondary finger print data to client, and request transmits and the corresponding data item of this secondary finger print data.
Among this embodiment, server is compared the one-level finger print data that receives earlier with the one-level finger print data of being stored, if it is inconsistent, then continue secondary finger print data that relatively receives and the secondary finger print data of being stored, the inconsistent secondary finger print data of the secondary finger print data that finds out and stored, and sending the synchronization request carry this inconsistent secondary finger print data to client, request transmits and the corresponding data item of this inconsistent secondary finger print data.In the present embodiment, server just request transmits the data item that changes, and does not need to ask to transmit all data item, and having significantly reduced needs data quantity transmitted, has promoted data synchronization efficiency.
As shown in Figure 5, embodiments of the invention provide a kind of data synchronous system, comprising:
Each mobile phone terminal all has unique local unique identification, under the local unique identification to data item concrete more than two should be arranged, such as name data item, image dataitem etc.Client 51 produces the one-level finger print data according to this part unique identification by the fingerprint generating algorithm, and the data item under this part unique identification encoded, such as the name data item is compiled is 1, it is 2 that the image data item is compiled, coding according to data item produces the secondary finger print data by the fingerprint generating algorithm then, each data item Figure 6 shows that the one-level finger print data ofclient 51 generations and the corresponding relation schematic diagram between the secondary finger print data to a secondary finger print data should be arranged.Client 51 sends toserver 52 with all finger print datas, local unique identification and all data item and backs up after generating one-level finger print datas and two above secondary finger print datas.
52 pairs of servers should have anabove client 51,server 52 is that eachclient 51 is distributed a global unique identification, and set up as shown in Figure 7 local unique identification and the corresponding relation between the global unique identification, after the data thatserver 52reception clients 51 send over, as shown in Figure 8, with two above secondary finger print datas and corresponding store data items under the catalogue of the global unique identification of correspondence.
Below in conjunction with system shown in Figure 5 method of data synchronization of the present invention is described in detail, as shown in Figure 9, present embodiment comprises:
Step 901,client 51 generate one-level finger print data and two above secondary finger print datas;
Afterclient 51 is initiated data sync,client 51 utilizes the fingerprint generating algorithm to produce the one-level finger print data according to the local unique identification of mobile phone terminal, if any data item under should the part unique identification changes, this one-level finger print data also can change so.
Step 902,client 51 send update request toserver 52;
The one-level finger print data of the one-level finger print data that step 903,server 52 relatively receive and self storage;
The secondary finger print data of the secondary finger print data that step 904,server 52 relatively receive and self storage finds out inconsistent secondary finger print data;
Step 905,server 52 send the synchronization request that carries this inconsistent secondary finger print data toclient 51, and the request transmission is to data item that should inconsistent secondary finger print data;
If newly-increased secondary finger print data is arranged, show that thenclient 51 has increased newly data item that should the secondary finger print data; If the secondary finger print data that changes shows that then change has taken place the data item that 51 pairs of clients should the secondary finger print data; If the secondary finger print data of deletion is arranged, show that thenclient 51 deleted data item that should the secondary fingerprint data.Server 52 is by comparison secondary finger print data, which variation has taken place in the data that can clearly knowclient 51 storages, then the data item that only needs the request transmission to change gets final product, avoided after finding that the one-level finger print data changes, ask all data item oftransmission client 51 storages, significantly reduced the transmission quantity of data sync;
Step 906,client 51 will send toserver 52 to data item that should inconsistent secondary finger print data;
Step 907,server 52 upgrade self stored data items and finger print data.
Theserver 52 one-level finger print data of storage before replaces with the one-level finger print data that receives, and replaces with the data item that receives with sending the data item that changes, and upgrades the secondary finger print data of this data item correspondence simultaneously.If increased data item in the client newly, this newly-increased data item ofserver 52 storages and corresponding secondary finger print data; If deleted data item in the client,server 52 these data item of deletion and corresponding secondary finger print data; If the data item in the client changes,server 52 upgrades this data item and corresponding secondary finger print data.By above-mentioned steps 901～907, just finished the data sync between the client and server.
Among this embodiment, also can include only local unique identification and two above secondary finger print datas in the update request, server is after receiving update request, two above secondary finger print datas that directly will receive compare with the secondary finger print data under the corresponding global unique identification, search inconsistent secondary finger print data.When the data item of client does not change, can avoid again the secondary finger print data being compared by in update request, carrying the one-level finger print data, reduced the workload of server.
Adopt the fingerprint generating algorithm to generate finger print data in the embodiment of the invention, and come the judgment data item whether to change by the variation of finger print data, some similar algorithms can be used in embodiments of the present invention equally, such as adopting the MD5 algorithm that data item is carried out digital signature, come the judgment data item whether to change according to the variation of digital signature.The embodiment of the invention adopts the data that the secondary finger print data relatively reduces needs transmission, along with the segmentation of data item and further increasing of data volume, can also adopt three grades or the above finger print data coupling of level Four further to reduce the data that need transmit.
The technical scheme of the embodiment of the invention not only can be applied in mobile phone terminal and data in server synchronously in, can also be applied in other scenes that need data sync simultaneously.
Among this embodiment, server stores one-level finger print data and the secondary finger print data that sends before the client in advance, receive one-level finger print data and secondary finger print data that client sends afterwards, and the one-level finger print data that receives compared with the one-level finger print data of being stored, if it is inconsistent, then continue secondary finger print data that relatively receives and the secondary finger print data of being stored, the inconsistent secondary finger print data of the secondary finger print data that finds out and stored, and sending the synchronization request carry this inconsistent secondary finger print data to client, request transmits and the corresponding data item of this inconsistent secondary finger print data.In the present embodiment, the data item that client only need change to Server Transport, and do not need to transmit all data item, having significantly reduced needs data quantity transmitted, has promoted data synchronization efficiency.
Described method embodiment is corresponding with described device embodiment, the description of relevant portion gets final product among the part comparable device embodiment that does not describe in detail in method embodiment, and the description of relevant portion gets final product among the part reference method embodiment that does not describe in detail in device embodiment.
One of ordinary skill in the art will appreciate that, realize that all or part of step in the foregoing description method is to instruct relevant hardware to finish by program, described program can be stored in the computer read/write memory medium, this program is when carrying out, comprise step as above-mentioned method embodiment, described storage medium, as: magnetic disc, CD, read-only storage memory body (Read-Only Memory, ROM) or at random store memory body (Random Access Memory, RAM) etc.
In each method embodiment of the present invention; the sequence number of described each step can not be used to limit the sequencing of each step; for those of ordinary skills, under the prerequisite of not paying creative work, the priority of each step is changed also within protection scope of the present invention.
The above is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from principle of the present invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (13)
1. a method of data synchronization is characterized in that, comprising:
User end to server sends update request, carries local unique identification and two above secondary finger print datas in the described update request;
Described client receives the synchronization request that carries the secondary finger print data that described server returns, and the secondary finger print data that carries in the described synchronization request is and the inconsistent secondary finger print data of the secondary finger print data of described server stores;
The corresponding data item of secondary finger print data that described client is carried in described server transmission and described synchronization request.
2. method of data synchronization according to claim 1 is characterized in that, also carries the one-level finger print data in the described update request.
3. method of data synchronization according to claim 1 is characterized in that, described user end to server also comprises before sending update request:
Described client generates the one-level finger print data according to described local unique identification by the fingerprint generating algorithm;
Described client is encoded to two above data item under the described local unique identification, and generates two the above secondary finger print datas corresponding with described data item according to described coding by the fingerprint generating algorithm.
4. a method of data synchronization is characterized in that, comprising:
Server receives the update request that client sends, and carries local unique identification and two above secondary finger print datas in the described update request;
Described server is compared described two above secondary finger print datas with the secondary finger print data of being stored, the inconsistent secondary finger print data of secondary finger print data that finds out Yu stored;
Described server sends the synchronization request that carries described inconsistent secondary finger print data to described client, and request transmits and the corresponding data item of described inconsistent secondary finger print data.
5. method of data synchronization according to claim 4 is characterized in that, the update request that described server receives the client transmission also comprises before:
Described server defines the local unique identification of described client and the corresponding relation between the global unique identification, and stores described corresponding relation.
6. according to claim 4 or 5 described method of data synchronization, it is characterized in that described server is compared described two above secondary finger print datas and comprised with the secondary finger print data of being stored:
Local unique identification that described whois lookup is stored and global unique identification corresponding relation are found out and the corresponding global unique identification of local unique identification that receives;
Described server is compared two received above secondary finger print datas with the secondary finger print data under the described global unique identification.
7. method of data synchronization according to claim 4 is characterized in that, also carries the one-level finger print data in the described update request, and described server also comprises before described two above secondary finger print datas are compared with the secondary finger print data of being stored:
Described server judges that one-level finger print data that carries in the described update request and the one-level finger print data of being stored are inconsistent.
8. a client is characterized in that, comprising:
Sending module is used for sending update request to server, carries local unique identification and two above secondary finger print datas in the described update request;
Receiver module is used to receive the synchronization request that carries the secondary finger print data that described server returns, and the secondary finger print data that carries in the described synchronization request is and the inconsistent secondary finger print data of the secondary finger print data of described server stores;
Respond module is used for sending the corresponding data item of secondary finger print data of carrying with described synchronization request to described server.
9. client according to claim 8 is characterized in that, described client also comprises:
Coding module is used for two above data item under the described local unique identification are encoded;
Generation module is used for generating two the above secondary finger print datas corresponding with described data item according to described coding by the fingerprint generating algorithm.
10. a server is characterized in that, comprising:
Receiver module is used to receive the update request that client sends, and carries local unique identification and two above secondary finger print datas in the described update request;
Comparison module, two above secondary finger print datas that are used for described receiver module is received are compared with the secondary finger print data of being stored, the inconsistent secondary finger print data of secondary finger print data that finds out Yu stored;
Processing module is used for sending the synchronization request that carries described inconsistent secondary finger print data to described client, and request transmits and the corresponding data item of described inconsistent secondary finger print data.
11. server according to claim 10 is characterized in that, described server also comprises:
Definition module is used to define the local unique identification of described client and the corresponding relation between the global unique identification;
Memory module is used to store described corresponding relation.
12., it is characterized in that described comparison module comprises according to claim 10 or 11 described servers:
Search submodule, be used to search the local unique identification of described memory module storage and the corresponding relation of global unique identification, find out the corresponding global unique identification of local unique identification that receives with described receiver module;
Comparison sub-module, two above secondary finger print datas that are used for described receiver module is received are compared with the secondary finger print data under the described global unique identification, find out with described global unique identification under the inconsistent secondary finger print data of secondary finger print data.
13. a data synchronous system is characterized in that, comprising:
Client, be used for sending update request to server, carry local unique identification and two above secondary finger print datas in the described update request, receive the synchronization request that carries the secondary finger print data that described server returns, the secondary finger print data that carries in the described synchronization request is and the inconsistent secondary finger print data of the secondary finger print data of described server stores the corresponding data item of secondary finger print data of carrying in described server transmission and described synchronization request;
Described server, be used to receive the update request that client sends, described two above secondary finger print datas are compared with the secondary finger print data of being stored, the inconsistent secondary finger print data of the secondary finger print data that finds out and stored, send the synchronization request that carries described inconsistent secondary finger print data to described client, request transmits and the corresponding data item of described inconsistent secondary finger print data.
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| CN103295426A (en)* | 2012-02-22 | 2013-09-11 | 腾讯科技（深圳）有限公司 | Method, device and system for processing electronic book |
| CN103634410A (en)* | 2013-12-12 | 2014-03-12 | 北京奇虎科技有限公司 | Data synchronization method based on content distribution network (CDN), client end and server |
| CN103731253A (en)* | 2013-12-20 | 2014-04-16 | 上海华勤通讯技术有限公司 | Communication device and synchronization method and communication system of wearable device paired with communication device |
| CN104580085A (en)* | 2013-10-17 | 2015-04-29 | 腾讯科技（深圳）有限公司 | Business data updating method, system, client side and server |
| CN105897382A (en)* | 2016-06-08 | 2016-08-24 | 乐视控股（北京）有限公司 | Data synchronization method and device |
| CN108833509A (en)* | 2018-05-31 | 2018-11-16 | 出门问问信息科技有限公司 | Method of data synchronization and device |
| CN110489389A (en)* | 2019-08-16 | 2019-11-22 | 北京旷视科技有限公司 | A kind of method of data synchronization and device |
| CN117149907A (en)* | 2023-08-31 | 2023-12-01 | 上海爱数信息技术股份有限公司 | Data synchronization method, device, equipment and medium |
- 2009
- 2009-12-24CNCN2009102608947Apatent/CN101741569B/ennot_activeExpired - Fee Related
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