CN102377591B - Backup method and system for gatekeeper (GK), and management server - Google Patents
Backup method and system for gatekeeper (GK), and management server Download PDFInfo
- Publication number
- CN102377591B CN102377591B CN201010261253.6A CN201010261253A CN102377591B CN 102377591 B CN102377591 B CN 102377591B CN 201010261253 A CN201010261253 A CN 201010261253A CN 102377591 B CN102377591 B CN 102377591B
- Authority
- CN
- China
- Prior art keywords
- fault
- configuration information
- management server
- switched
- information
- 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.)
- Active
Links
Images
Abstract
The invention discloses a backup method for a gatekeeper (GK). The method comprises the following steps that: a management server acquires configuration information of each GK of all GKs, monitors running states of the GKs, calculates the service bearing capacity of a faulted GK according to the acquired configuration information of the faulted GK, calculates the maximum residual bearing capacity of other GKs according to the configuration information of other GKs, switches the configuration information of the faulted GK onto a proper GK according to the calculated bearing capacity, and registers all meeting terminals and microprogrammed control unit (MCU) information which are registered on the faulted GK to the switched GK according to the acquired configuration information of the faulted GK. The invention also discloses a backup system for the GK and the management server. By applying the GK backup method, the GK backup system and the management server, (N+1) backup of the GK can be realized, and the position of the GK is limitless.
Description
Technical field
The present invention relates to video conferencing system technical field, particularly a kind of gatekeeper's (GK) backup method and standby system and management server.
Background technology
Video conferencing system realizes virtual meeting by the network communications technology, and the user who geographically disperses is gathered in to a place, by various ways exchange of information such as image, sound, carries out collaborative work.Space length has been shortened in video conference to the full extent, has facilitated between cooperation member in real time, has exchanged intuitively, and therefore, this conference model has obtained more and more general application.Fig. 1 is the structural representation of existing complete video conferencing system, and as shown in Figure 1, this system comprises: conference terminal, multipoint control unit (MCU), GK and management server.Wherein, GK is the nucleus equipment in video conference, be responsible for conference terminal and MCU in administration video conferencing system, and the GK that each conference terminal and MCU can be registered under it is upper, GK provides the functions such as address translation, call authorization and call routing for registered conference terminal and MCU.GK in neighborhood is neighbor GK each other, and neighbor GK configures the other side's number section mutually, has comprised conference terminal and the MCU information of the upper registration of this GK respective neighbours GK in number section.
Due to the central role of GK in video conferencing system, when the GK of responsible some conference terminal and MCU breaks down, can have a strong impact on the normal operation of whole video conference, therefore, GK has been backed up into needing the problem of solution in existing video conferencing system badly.
Mainly adopted at present Internet Protocol (IP) address multiplex technology to realize the backup of GK, be specially: primary GK and standby GK externally provide unified IP address, and externally provide service by this unified IP address; When primary GK breaks down, standby GK, by sending address resolution protocol (ARP) message to management server, takies the external unified IP address of using before primary GK, and takes over the work before primary GK, thereby can realize, GK is backed up.
As can be seen from the above analysis, although existing adopted GK redundancy technique can realize, GK is backed up, yet, on the one hand, owing to realizing GK backup by IP address multiplex technology, and an IP address can only be used by a GK at one time, therefore, existing scheme only can back up a GK, only can realize the 1+1 backup to GK, can not realize a plurality of GK are backed up, it is the N+1 backup of GK, wherein, described N is positive integer, and N > 1; On the other hand, because primary GK and standby GK have been used unified IP address that service is externally provided, and standby GK need to can externally be used unified IP address with primary GK in same place with primary GK, therefore, existing have requirement to the position of GK when GK is backed up.
Summary of the invention
In view of this, the invention provides the backup method of a kind of GK, not only can realize the N+1 backup to GK, and without the position that retrains GK.
The present invention also provides standby system and the management server of a kind of GK, not only can realize the N+1 backup to GK, and without the position that retrains GK.
In order to achieve the above object, the technical scheme that the present invention proposes is:
A backup method of gatekeeper GK, is applied to comprise that in the video conferencing system of conference terminal, multipoint control unit MCU, management server and some GK, the method comprises:
Management server obtains the configuration information of each GK in all GK, and monitors the running status of these GK;
When any one GK fault, management server calculates the ability of bearer service of this fault GK according to the configuration information of this fault GK obtaining, calculates the residue maximum load-carrying capacity of other GK according to the configuration information of other GK getting;
According to the bearing capacity calculating, after management server is switched on suitable GK by the configuration information of this fault GK, according to the configuration information of the fault GK getting, management server by all conference terminal on this fault GK and MCU information registerings of being registered to the GK being switched to.
The configuration information of described each GK comprises neighbor GK information that the conference terminal that is registered on this GK and MCU information, this GK are corresponding and number section of neighbor GK.
The bearing capacity that described basis calculates, management server is switched to the configuration information of this fault GK on suitable GK and comprises:
When the residue maximum load-carrying capacity of certain GK calculating is greater than the ability of bearer service of this fault GK, management server is directly all switched to the configuration information of this fault GK on this GK; Or,
When the residue maximum load-carrying capacity of certain GK calculating is greater than the ability of bearer service of this fault GK, it is upper that management server is partly switched to this GK by the configuration information of this fault GK, and residue configuration information is switched on other GK; Or,
When the residue maximum load-carrying capacity of all GK that calculate is all less than the ability of bearer service of this fault GK, management server is switched to the configuration information of this fault GK respectively on different GK.
After described management server is switched on suitable GK by the configuration information of this fault GK, the method also comprises: revise the neighborhood of the GK of neighborhood each other.
The described modification each other neighborhood of the GK of neighborhood comprises: number section of this fault GK information comprising in neighbor GK corresponding to fault GK and fault GK is updated to the corresponding neighbor GK information that is switched to and number section of neighbor GK.
Described the conference terminal and the MCU information registering that are registered on this fault GK are comprised to the GK being switched to: the address that the GK being switched to is revised as in the address that is registered to conference terminal on this fault GK and MCU information.
A standby system of gatekeeper GK, this system comprises: conference terminal, multipoint control unit MCU, management server and some GK, conference terminal and MCU information registering are upper to corresponding GK, wherein,
Management server obtains the configuration information of each GK in all GK, monitor the running status of these GK, according to the configuration information of the fault GK obtaining, calculate the ability of bearer service of this fault GK, according to the configuration information of other GK getting, calculate the residue maximum load-carrying capacity of other GK, according to the bearing capacity calculating, after the configuration information of this fault GK is switched on suitable GK, according to the configuration information of the fault GK getting, by all conference terminal on this fault GK and MCU information registerings of being registered to the GK being switched to.
Described management server is also for revising the neighborhood of the GK of neighborhood each other.
, be applied to comprise that in the video conferencing system of conference terminal, multipoint control unit MCU and some gatekeeper GK, this management server comprises: acquiring unit, computing unit and switch unit, wherein,
Described acquiring unit, for obtaining the configuration information of all GK, and monitors the running status of these GK;
Described computing unit, for when any one GK fault, the configuration information of the fault GK obtaining according to acquiring unit calculates the ability of bearer service of this fault GK, and according to the configuration information of other GK, calculates the residue maximum load-carrying capacity of other GK;
Described switch unit, for the bearing capacity calculating according to computing unit, after the configuration information of fault GK is switched on suitable GK, the configuration information of the fault GK getting according to acquiring unit, by all conference terminal on this fault GK and MCU information registerings of being registered to the GK being switched to.
Described management server also comprises updating block, after fault GK being switched on suitable neighbor GK when switch unit, revises the neighborhood of the GK of neighborhood each other.
In sum, the backup method of GK of the present invention, by the configuration information of all GK being managed by management server, thereby make when wherein any one GK breaks down, management server can be upper to other GK by the conference terminal and the MCU information switching that are registered on this GK, thereby realized the backup to GK.Because management server is that all GK are managed, therefore, when any plural GK of its management breaks down, the GK that can both break down to these backs up, can realize the N+1 backup to GK, and when wherein manage any plural GK fault time, it is upper that the information on these faults GK also can be switched to a plurality of GK, thereby realized the N+M backup to GK; Meanwhile, the GK that management server is managed is without in same place, thereby the method that the present invention backs up GK is without the position of constraint GK.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing complete video conferencing system;
Fig. 2 is the workflow diagram of GK backup method embodiment of the present invention;
Fig. 3 is the structural representation of management server of the present invention.
Embodiment
In order to solve problems of the prior art, the backup method of GK of the present invention, by the configuration information of all GK being managed by management server, thereby make when wherein any one GK breaks down, management server can be upper to other GK by the conference terminal and the MCU information switching that are registered on this GK, thereby realized the backup to GK.Because management server is that all GK are managed, therefore, when any plural GK of its management breaks down, the GK that can both break down to these backs up, can realize the N+1 backup to GK, and when wherein manage any plural GK fault time, it is upper that the information on these faults GK also can be switched to a plurality of GK, thereby realized the N+M backup to GK; Meanwhile, the GK that management server is managed is without in same place, thereby the method that the present invention backs up GK is without the position of constraint GK.
Based on above-mentioned introduction, the specific implementation of scheme of the present invention comprises:
Management server obtains the configuration information of each GK in all GK, and monitors the running status of these GK;
When any one GK fault, management server calculates the ability of bearer service of this fault GK according to the configuration information of this fault GK obtaining, calculates the residue maximum load-carrying capacity of other GK according to the configuration information of other GK getting;
According to the bearing capacity calculating, after management server is switched on suitable GK by the configuration information of this fault GK, according to the configuration information of the fault GK getting, management server by all conference terminal on this fault GK and MCU information registerings of being registered to the GK being switched to.
For making the object, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with the accompanying drawings and the specific embodiments.
Fig. 2 is the workflow diagram of GK backup method embodiment of the present invention, and the method is applied to the video conferencing system that comprises conference terminal, MCU, GK and management server as shown in Figure 1.As shown in Figure 2, this flow process comprises the following steps:
Step 201: management server obtains the configuration information of all GK in system, and monitor the running status of these GK.
In this step, the configuration information of described GK has at least comprised neighbor GK information that the conference terminal that is registered on this GK and MCU information, this GK are corresponding and number section of neighbor GK.
Step 202: when any one GK being detected and break down, management server calculates the ability of bearer service of fault GK and the residue maximum load-carrying capacity of all the other GK according to the configuration information of the GK obtaining.
It should be noted that, because management server has obtained the configuration information of all GK, thereby, according to the configuration information of fault GK, can obtain the ability of bearer service of fault GK, according to the configuration information of all the other GK, can obtain corresponding residue maximum load-carrying capacity.
Step 203: according to the bearing capacity that calculates GK, management server is switched to the configuration information of fault GK on suitable GK.
In this step, according to the bearing capacity of the GK calculating, the mode that management server is switched to the configuration information of fault GK on suitable GK can be:
When the residue maximum load-carrying capacity of certain GK calculating is greater than the ability of bearer service of fault GK, management server is directly all switched to the configuration information of fault GK on this GK; Or,
When the residue maximum load-carrying capacity of certain GK calculating is greater than the ability of bearer service of fault GK, it is upper that management server is partly switched to this GK by the configuration information of fault GK, and residue configuration information is switched to other GK upper (can realize thus N+M backup); Or,
When the residue maximum load-carrying capacity of all GK that calculate is all less than the ability of bearer service of fault GK, management server is switched to respectively different GK upper (also can realize thus N+M backup) by the configuration information of fault GK.
It should be noted that, above-mentioned several modes, only for illustrating, also can adopt alternate manner in reality, not affect the realization of the embodiment of the present invention, are as the criterion.
Also it should be noted that, after management server is switched on suitable GK by the configuration information of fault GK, also need to revise the neighborhood of the GK of neighborhood each other, the described modification each other neighborhood of the GK of neighborhood comprises: number section of the fault GK information comprising in neighbor GK corresponding to fault GK and fault GK is updated to the corresponding neighbor GK information that is switched to and number section of neighbor GK.
Step 204: according to the configuration information of the fault GK getting, management server by all conference terminal on this fault GK and MCU information registerings of being registered to the GK being switched to.
In this step, the conference terminal and the MCU information registering that are registered on this fault GK are comprised to the GK being switched to: the address that the GK being switched to is revised as in the address that is registered to conference terminal on this fault GK and MCU information.
It should be noted that, in this step, management server need to send to the message of revising log-on message the conference terminal and the MCU that are registered on fault GK upper, when conference terminal and MCU receive after the message of revising log-on message, if be in Meeting Held, in order to guarantee meeting, do not interrupt, can directly log-on message be modified, or, wait after meeting adjourned and again log-on message is modified, in actual applications, not affect the realization of the embodiment of the present invention, be as the criterion.
So far, completed the whole workflow of GK backup method of the present invention.
Based on above-mentioned GK backup method, Fig. 3 has provided the structure of management server of the present invention.As shown in Figure 3, this management server comprises: acquiring unit 31, computing unit 32 and switch unit 33 and updating block 34.Wherein,
Described acquiring unit 31, for obtaining the configuration information of all GK, and monitors the running status of these GK.
Described computing unit 32, for when any one GK fault, the configuration information of the fault GK obtaining according to acquiring unit 31 calculates the ability of bearer service of this fault GK, and according to the configuration information of other GK, calculates the residue maximum load-carrying capacity of other GK.
Described switch unit 33, for the bearing capacity calculating according to computing unit 32, after the configuration information of fault GK is switched on suitable GK, the configuration information of the fault GK getting according to acquiring unit 31, by all conference terminal on this fault GK and MCU information registerings of being registered to the GK being switched to.
Further, described management server also comprises updating block 34, after fault GK being switched to when switch unit 33 on suitable GK, revises the neighborhood of the GK of neighborhood each other.
So far, obtained management server of the present invention.The specific works flow process of the management server shown in Fig. 3 can, referring to Fig. 2, repeat no more here.
In a word, the backup method of GK of the present invention, by the configuration information of all GK being managed by management server, thereby make when wherein any one GK breaks down, management server can be upper to other GK by the conference terminal and the MCU information switching that are registered on this GK, thereby realized the backup to GK.Because management server is that all GK are managed, therefore, when any plural GK of its management breaks down, the GK that can both break down to these backs up, can realize the N+1 backup to GK, and when wherein manage any plural GK fault time, it is upper that the information on these faults GK also can be switched to a plurality of GK, thereby realized the N+M backup to GK; Meanwhile, the GK that management server is managed is without in same place, thereby the method that the present invention backs up GK is without the position of constraint GK.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of making, be equal to replacement, improvement etc., within all should being included in the scope of protection of the invention.
Claims (9)
1. a backup method of gatekeeper GK, is applied to comprise in the video conferencing system of conference terminal, multipoint control unit MCU, management server and some GK, and it is characterized in that, the method comprises:
Management server obtains the configuration information of each GK in all GK, and monitors the running status of these GK;
When any one GK fault, management server calculates the ability of bearer service of this fault GK according to the configuration information of this fault GK obtaining, calculates the residue maximum load-carrying capacity of other GK according to the configuration information of other GK getting;
When the residue maximum load-carrying capacity of certain GK calculating is greater than the ability of bearer service of this fault GK, management server is directly all switched to the configuration information of this fault GK on this GK; Or,
When the residue maximum load-carrying capacity of certain GK calculating is greater than the ability of bearer service of this fault GK, it is upper that management server is partly switched to this GK by the configuration information of this fault GK, and residue configuration information is switched on other GK; Or,
When the residue maximum load-carrying capacity of all GK that calculate is all less than the ability of bearer service of this fault GK, management server is switched to the configuration information of this fault GK respectively on different GK;
According to the configuration information of the fault GK getting, management server by all conference terminal on this fault GK and MCU information registerings of being registered to the GK being switched to.
2. method according to claim 1, is characterized in that, the configuration information of described each GK comprises neighbor GK information that the conference terminal that is registered on this GK and MCU information, this GK are corresponding and number section of neighbor GK.
3. method according to claim 1, is characterized in that, after described management server is switched on suitable GK by the configuration information of this fault GK, the method also comprises: revise the neighborhood of the GK of neighborhood each other.
4. method according to claim 3, it is characterized in that, the described modification each other neighborhood of the GK of neighborhood comprises: number section of this fault GK information comprising in neighbor GK corresponding to fault GK and fault GK is updated to the corresponding neighbor GK information that is switched to and number section of neighbor GK.
5. method according to claim 1, it is characterized in that, described the conference terminal and the MCU information registering that are registered on this fault GK are comprised to the GK being switched to: the address that the GK being switched to is revised as in the address that is registered to conference terminal on this fault GK and MCU information.
6. a standby system of gatekeeper GK, is characterized in that, this system comprises: conference terminal, multipoint control unit MCU, management server and some GK, and conference terminal and MCU information registering are upper to corresponding GK, wherein,
Management server obtains the configuration information of each GK in all GK, monitor the running status of these GK, according to the configuration information of the fault GK obtaining, calculate the ability of bearer service of this fault GK, according to the configuration information of other GK getting, calculate the residue maximum load-carrying capacity of other GK, when the residue maximum load-carrying capacity of certain GK calculating is greater than the ability of bearer service of this fault GK, management server is directly all switched to the configuration information of this fault GK on this GK; Or when the residue maximum load-carrying capacity of certain GK calculating is greater than the ability of bearer service of this fault GK, it is upper that management server is partly switched to this GK by the configuration information of this fault GK, and residue configuration information is switched on other GK; Or when the residue maximum load-carrying capacity of all GK that calculate is all less than the ability of bearer service of this fault GK, management server is switched to the configuration information of this fault GK respectively on different GK; According to the configuration information of the fault GK getting, by all conference terminal on this fault GK and MCU information registerings of being registered to the GK being switched to.
7. system according to claim 6, is characterized in that, described management server is also for revising the neighborhood of the GK of neighborhood each other.
8. a management server, is applied to comprise in the video conferencing system of conference terminal, multipoint control unit MCU and some gatekeeper GK, and it is characterized in that, this management server comprises: acquiring unit, computing unit and switch unit, wherein,
Described acquiring unit, for obtaining the configuration information of all GK, and monitors the running status of these GK;
Described computing unit, for when any one GK fault, the configuration information of the fault GK obtaining according to acquiring unit calculates the ability of bearer service of this fault GK, and according to the configuration information of other GK, calculates the residue maximum load-carrying capacity of other GK;
Described switch unit, when the residue maximum load-carrying capacity of certain GK calculating is greater than the ability of bearer service of this fault GK, for directly the configuration information of this fault GK being all switched to this GK; Or,
When the residue maximum load-carrying capacity of certain GK calculating is greater than the ability of bearer service of this fault GK, for the configuration information of this fault GK is partly switched to this GK, and residue configuration information is switched on other GK; Or,
When the residue maximum load-carrying capacity of all GK that calculate is all less than the ability of bearer service of this fault GK, for the configuration information of this fault GK is switched to respectively to different GK;
Also for the configuration information of the fault GK that gets according to acquiring unit, by all conference terminal on this fault GK and MCU information registerings of being registered to the GK being switched to.
9. management server according to claim 8, is characterized in that, described management server also comprises updating block, after fault GK being switched on suitable neighbor GK when switch unit, revises the neighborhood of the GK of neighborhood each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010261253.6A CN102377591B (en) | 2010-08-23 | 2010-08-23 | Backup method and system for gatekeeper (GK), and management server |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010261253.6A CN102377591B (en) | 2010-08-23 | 2010-08-23 | Backup method and system for gatekeeper (GK), and management server |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102377591A CN102377591A (en) | 2012-03-14 |
| CN102377591B true CN102377591B (en) | 2014-02-05 |
Family
ID=45795612
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010261253.6A Active CN102377591B (en) | 2010-08-23 | 2010-08-23 | Backup method and system for gatekeeper (GK), and management server |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102377591B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103428020B (en) * | 2012-05-24 | 2019-02-19 | 中兴通讯股份有限公司 | Method, system and the cloud base station of disaster recovery backup between a kind of cloud base station |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1452405A (en) * | 2002-04-18 | 2003-10-29 | 华为技术有限公司 | All-process backup video communication system |
| JP3955796B2 (en) * | 2002-06-14 | 2007-08-08 | 松下電器産業株式会社 | Gatekeeper redundancy system |
| CN101321087A (en) * | 2008-07-01 | 2008-12-10 | 杭州华三通信技术有限公司 | Backup network switching method, system and device |
-
2010
- 2010-08-23 CN CN201010261253.6A patent/CN102377591B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1452405A (en) * | 2002-04-18 | 2003-10-29 | 华为技术有限公司 | All-process backup video communication system |
| JP3955796B2 (en) * | 2002-06-14 | 2007-08-08 | 松下電器産業株式会社 | Gatekeeper redundancy system |
| CN101321087A (en) * | 2008-07-01 | 2008-12-10 | 杭州华三通信技术有限公司 | Backup network switching method, system and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102377591A (en) | 2012-03-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4644683B2 (en) | Method for displaying site information in a video conference system | |
| CN101150439A (en) | A method, system and device for realizing master/slave switching | |
| CN105681454A (en) | Method and system for self-adaptively connecting cloud desktop | |
| CN104243205A (en) | Message processing method and device used during virtual switch fault | |
| CN104601380B (en) | A kind of software defined network controller and its method for restoring host information | |
| CN105760260A (en) | Backup system and backup method | |
| CN101227333B (en) | Disaster tolerance network managing system and login method of network managing subscriber end | |
| CN107682411A (en) | A kind of extensive SDN controllers cluster and network system | |
| CN104639867A (en) | Method and system for resuming video conferences | |
| CN104284132A (en) | Video communication method and device | |
| CN101145972B (en) | A disaster tolerance network management system and login method of network management clients | |
| CN101163029B (en) | Multi-point control cell main-slave rearranging method and equipment | |
| CN102238092B (en) | Method for performing load sharing on encoder and encoder | |
| CN1988553A (en) | Method and device for realizing field name registration | |
| CN101217293B (en) | Media operation trusteeship switching system and method | |
| CN102377591B (en) | Backup method and system for gatekeeper (GK), and management server | |
| CN101247499B (en) | Network port backup method of MCU, MCU and video system | |
| CN102111606B (en) | Method and device for accessing to video images in video conference system | |
| CN1996826A (en) | Method, system and soft switch device for dual-homing | |
| CN115529433A (en) | Cross-domain polling method and device for cascading video conference and electronic equipment | |
| CN102006187B (en) | A kind of network-building method of soft switch gateway exchange and network | |
| CN103179102A (en) | Method, device and system for desktop virtualization | |
| CN100579054C (en) | Controlling method, system and device for reciprocal imputation session boundary controller | |
| CN102387211B (en) | Method and system for realizing web service use of network application software | |
| CN102055638B (en) | Network seamless handover device and system and computer terminal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 310052 Binjiang District Changhe Road, Zhejiang, China, No. 466, No. Patentee after: Xinhua three Technology Co., Ltd. Address before: 310053 Hangzhou hi tech Industrial Development Zone, Zhejiang province science and Technology Industrial Park, No. 310 and No. six road, HUAWEI, Hangzhou production base Patentee before: Huasan Communication Technology Co., Ltd. |