CN1214635C - Conference dispatching system and method of IP network meeting TV-set - Google Patents

Abstract

The present invention relates to a conference dispatching system for an IP network conference television and a method. The conference dispatching system comprises top gatekeepers (GK), first-grade gatekeepers (GK), multi-point control devices (MCU) and H. 323 terminals, and the top gatekeepers (GK), the first-grade gatekeepers, the multi-point control devices and the H323 terminals are devices specified by an H. 323 protocol; communication protocols between the GK and the MCU, between the GK and the H323 terminals, between the GK of the same grade and between the first-grade GK and the top GK adopt an H. 323 standard protocol for expansion. The networking structure of an IP network conference television system is a grading networking management structure; the MCU and the H. 323 terminals are managed by the top GK or the first-grade GK; therefore, conference resources of an entire network can be singly used according to GK grades and can be used in a resource share mode; in this way, the extensibility and the interoperability of the entire IP network conference television system are greatly enhanced. Besides, each GK is provided with an authentication and dispatching interface, which guarantees that the IP network conference television system can conveniently realize standard interfaces with an AAA server, an Internet Content Provider (ICP) and an IP intelligent network.

Description

Conference Scheduling System and Method for IP Network Conference Video

technical field

The invention relates to the field of video conferencing, and more particularly, the invention relates to a conference scheduling system and method of an IP network video conference with multi-point scheduling function and convenient expansion.

technical background

With the continuous development of network technology, people want to communicate face-to-face through the network. Therefore, a video conference system based on IP network that can provide real-time, fast and interactive image, voice, data and other information exchange functions came into being. .

The current IP network conference TV system is generally used in private networks and enterprises. There are two common networking methods: built-in IP network conference TV system (see Figure 1), external IP network conference TV system (see Figure 2 ), the following introduces the IP network conference TV system of these two different networking methods:

The difference between the two systems is: the conference scheduling device of the built-in IP network video conference system is built-in; while the conference scheduling device of the external IP network video conference system is external.

Regardless of whether the conference scheduling device is built-in or external, these two IP network video conference systems manage the MCU (Multiple Control Unit) through an internal private protocol, and use a special conference scheduling device to centrally manage multiple MCUs for conferences Scheduling, the specific scheduling process is as follows:

A. The user first reserves a conference on the conference scheduling device, defines the bandwidth of the conference, the number of terminal sites in the conference, and the opening time and ending time of the conference;

B. Then the user executes the conference scheduling operation on the conference scheduling device. The conference scheduling device judges whether the resources are sufficient according to the MCU, GK (gatekeeper), and terminal usage during the conference time. If sufficient, the conference reservation is successful, otherwise the conference reservation is unsuccessful. After the reservation is successful, the meeting scheduling device records the reserved meeting;

C. When the meeting time is up, the meeting scheduling device automatically sends the meeting information to the MCU and GK, and then the MCU calls the terminal to make the terminal join the MCU to hold a meeting;

D. During the conference, the conference scheduling device can issue commands to the MCU, add or delete conference sites, switch conference site images, etc.;

E. When the conference end time is reached, the conference scheduling device issues a command to end the conference, and at the same time, the MCU and GK release the resources occupied by the conference.

However, since the above two networking methods manage MCUs through internal private protocols, and use a dedicated conference scheduling device to centrally manage multiple MCUs for conference scheduling, both of them have the following disadvantages:

1. The communication protocol between the conference scheduling equipment and the equipment stipulated in the ITU-T.H.323 agreement does not belong to the standard H.323 agreement;

2. All resources are only managed by one conference scheduling device, which requires high performance and security for the conference scheduling device;

3. The expansion performance and intercommunication performance are poor, and it is difficult for conference TV equipment from different manufacturers to communicate with each other;

4. It is only suitable for the internal use of the private network, and cannot realize cross-regional, hierarchical and international public IP conference TV services.

Contents of the invention

The object of the present invention is to provide a conference dispatching system and method of an IP network video conference in which both the conference dispatching equipment and the equipment stipulated in the ITU-T.H.323 protocol belong to the standard H.323 protocol.

Another object of the present invention is to provide a conference scheduling system and method for an IP network video conference that has good scalability and intercommunication performance and can communicate with video conference equipment from different manufacturers.

Another object of the present invention is to provide an IP network that can be applied to private networks, and can realize cross-regional, hierarchical and international public IP conference TV services, and has low requirements on the performance and security of conference TV scheduling equipment A conference scheduling system and method for a video conference.

In order to achieve the above object, the present invention adopts the following technical solutions:

The IP video conferencing system of the present invention includes: a top-level GK (gatekeeper), a first-level GK, an MCU (Multiple Control Unit) and an H323 terminal, and these devices are all devices specified in the H.323 protocol. Between GKs and H.323 terminals, between GKs at the same level, and between first-level GKs and top-level GKs, all communication protocols are extended using the H.323 standard protocol. The network structure of the IP video conferencing system of the present invention is a hierarchical network management structure. Both the MCU and the H.323 terminal are managed by the top-level GK or the first-level GK, so that the conference resources of the entire network can be used independently according to the GK classification, and The shared use of resources can be realized, thereby greatly enhancing the scalability and interoperability of the entire system. In addition, each GK also provides an authentication and scheduling interface, thereby ensuring that the IP network videoconferencing system of the present invention can be easily connected with AAA (Authentication, Authorization, and Accounting: verification, authorization and accounting) server, ICP and IP intelligent network Realize the standard interface between them to meet the needs of public IP conference TV operation.

Since the present invention adopts the above technical scheme, it has the following advantages:

1. Since the GK is used as the conference scheduling device, it is not like the conference scheduling device in the traditional system that uses a special conference and is managed through an internal private protocol, and the GK and the H.323 terminal in the present invention all use the H. 323 extension protocol, so when the user performs conference TV business activities such as account authentication, conference reservation, and conference calling, the GK in the system will reserve the MCU or H.323 terminal under its jurisdiction according to the resources required by the conference , allocation and scheduling.

2. Since the GK and the MCU use the H323 extension protocol, the GK can manage the conference resources of the MCU, analyze and understand the resource usage of the MCU within a certain time range, and send the relevant command information of the conference to the MCU. In turn, functions such as holding a meeting, ending a meeting, joining a meeting, and leaving a meeting are realized.

3. Since the H.323 extended protocol is adopted between GK and GK, the conference scheduling function across GK areas can be realized conveniently.

4. Due to the adoption of the networking mode of the two-level GK structure, the function of sharing and scheduling conference resources among different operators can be realized.

5. Since each GK provides an authentication interface, it can realize the user account authentication function.

6. Since each GK is provided with a scheduling interface, the IP network video conference system can communicate with the WEB Server, ICP (Internet Content Provider: Internet Content Provider) and IP intelligent network on the Internet to meet the needs of business operations. need.

Description of drawings

Figure 1 is a traditional built-in IP network conference TV system;

Figure 2 is a traditional external IP network conference TV system;

Fig. 3 is a network diagram of the IP video conferencing system of the present invention;

Fig. 4 is the flow chart of the conference reservation scheduling method under the same level of GK in the IP video conferencing system of the present invention;

Fig. 5 is the flow chart of the conference end scheduling method under the same level of GK in the IP video conferencing system of the present invention;

Fig. 6 is a flow chart of the conference reservation scheduling method between different GKs under the same top-level GK in the IP video conferencing system of the present invention;

Fig. 7 is the flow chart of the conference reservation scheduling method between different top-level GKs in the IP video conferencing system of the present invention;

Fig. 8 is a flow chart of a method for inviting another terminal to join a conference by a terminal in the IP video conferencing system of the present invention;

9 is a flowchart of a method for a terminal in the IP video conference system of the present invention to cause another terminal that has joined the conference to leave the conference;

Fig. 10 is a flow chart of the method for scheduling a conference reservation through the scheduling interface of the GK in the IP video conference system of the present invention.

Detailed ways

Please refer to Fig. 3, the IP video conferencing system of the present invention includes: top-level GK, first-level GK, MCU and H.323 terminal, these equipments are the equipment stipulated in H.323 agreement, between GK and MCU, GK and The communication protocols between H.323 terminals, between GKs at the same level, and between first-level GKs and top-level GKs are all extended by the H.323 standard protocol. The network structure of the IP video conferencing system of the present invention is a hierarchical network management structure, and the MCU and the H.323 terminal are managed by the top-level GK or the first-level GK, which enables the conference resources of the entire network to be used independently according to the GK classification, It can also realize the shared use of resources, thereby greatly enhancing the scalability and interoperability of the entire system. In addition, each GK also provides an authentication and scheduling interface, thereby ensuring that the IP network videoconferencing system of the present invention can be easily connected with AAA (Authentication, Authorization, and Accounting: verification, authorization and accounting) server, ICP and IP intelligent network Realize the standard interface between.

In the present invention, in order to realize conference resource scheduling, the protocol extended by GK on the basis of the H323 standard protocol mainly involves the ITU-T H.225 RAS protocol. Since the standard H.323 protocol is used for extension, and the extension method is also carried out in compliance with the extension fields specified in the H.323 protocol, the extended protocol will not affect the processing of the original standard protocol. The following are the extended protocols of the present invention:

(1) ARQ/ACF/ARJ: applicable between GK and H 323 terminals, between GK and MCU (ARQ: Admission Request; ACF: Admission Confirm; ARJ: Admission Reject);

(2) LRQ/LCF/LRJ: Applicable between first-level GK, between first-level GK and top-level GK, between GK and WEB Server, ICP or IP intelligent network (LRQ: Location Request; LCF: Location Confirm; LRJ: Location Reject ).

In addition, the H.225 ANNEXG protocol can be used to extend between the first-level GK and the top-level GK, and between the first-level GK; the protocol between the GK and the AAA server is the standard Radius protocol (RFC2685, RFC2687). It is a well-known technology, so it will not be described in detail here.

In the following, several processing methods for scheduling and controlling IP conference resources by the IP video conference system of the present invention will be described in detail in conjunction with FIGS. 4 to 10 :

The first method: the method of meeting appointment scheduling under the same level of GK

Please refer to Figure 4 for the method of conference reservation scheduling under the same level of GK, as follows:

1a. Terminal 1 requests to reserve a conference, and sends ARQ signaling with account number and password to first-level GK1;

1b. Level-1 GK1 initiates an authentication request Account Request message to the AAA server according to the user's account number and password;

1c. The AAA server authenticates the account and password, and returns an Account Response message if the meeting is allowed;

1d. If the user is allowed to reserve a conference, the first-level GK1 returns the ACF signaling, otherwise it returns the ARJ signaling rejection;

1e. Terminal 1 sends ARQ signaling with conference information to level-1 GK1;

1f. The first-level GK1 extracts conference information from ARQ signaling, and performs resource scheduling calculations. If resources are sufficient, resource reservation is performed, and ACF signaling is returned to terminal 1, and the resource allocation and conference status of the reserved conference are recorded at the same time. Information such as start and end time; if resources are insufficient, first-level GK1 returns ARJ signaling;

1g. When the meeting time arrives, the first-level GK1 sends ARQ signaling to the MCU, sends the terminal site information involved in the meeting to the MCU, and orders the MCU to start the meeting;

1h. After receiving the command from the first-level GK1, the MCU sends a Setup call signaling to Terminal 1 according to the terminal site information, establishes a call with Terminal 1, and makes Terminal 1 join the conference.

The MCU also follows this step to call all other terminals in the conference to join the conference to complete the conference.

The second method: the method of scheduling the end of the meeting under the same level of GK

Please refer to Figure 5, the method for scheduling the end of a conference under the same level of GK, as follows:

2a. Terminal 1 requests to end the conference, and sends ARQ signaling with account number and password to primary GK1;

2b. Level-1 GK1 initiates an authentication request Account Request message to the AAA server according to the user's account number and password;

2c. The AAA server authenticates the account and password, and returns an Account Response message if it is allowed to end the conference;

2d. If the user is allowed to end the conference, the primary GK1 returns the ACF signaling;

2e. Terminal 1 sends ARQ signaling with conference ending information to primary GK1;

2f. The first-level GK1 extracts the meeting information to be ended from the ARQ signaling, and sends the ARQ signaling for ending the meeting to the MCU;

2g After the MCU receives the conference end command, it sends disconnect signaling to all conference terminals to make all terminals leave the conference, and at the same time, the MCU releases the resources occupied by the conference;

2h. After the MCU ends the conference, it returns the ACF signaling to the first-level GK1;

2i. The first-level GK1 receives the ACF signaling to end the conference, releases the conference information stored on the first-level GK1, and returns the ACF signaling to terminal 1, so that terminal 1 leaves the conference.

The third method: conference reservation scheduling method between different GKs under the same top-level GK

Please refer to Figure 6, which shows the conference reservation scheduling method between first-level GKs, between first-level GKs and top-level GKs under the same top-level GK, as follows:

3a. Terminal 1 requests to reserve a conference, and sends ARQ signaling with account number and password to first-level GK1;

3b. Level-1 GK1 initiates an authentication request Account Request message to the AAA server according to the user's account number and password;

3c. The AAA server authenticates the account and password, and returns an Account Response message if the meeting is allowed;

3d. If the user is allowed to reserve a conference, the primary GK1 returns the ACF signaling. Otherwise return ARJ signaling rejection;

3e. Terminal 1 sends ARQ signaling with conference information to primary GK1;

3f. The first-level GK1 extracts conference information from the ARQ signaling, analyzes the conference information, and finds that the conference involves other sites that are managed by the first-level GK2, and then sends the LRQ signaling with site resource request information to the first-level GK2;

3g. After receiving the LRQ signaling with the resource request, the first-level GK2 judges whether it is available according to the usage of the site resource, and if it is available, reserves it, and returns the LCF signaling to the first-level GK1. If the site resources are unavailable, return the LRJ signaling to the first-level GK1;

3h. In addition to allocating the resources managed by itself, the first-level GK1 considers that all conference site resources have been allocated successfully according to the received LCF signaling, records the conference resource information and the start and end time of the conference, and then returns the ACF signaling to Terminal 1, Indicates that the conference reservation is successful. If the first-level GK1 finds that its own resources are insufficient or receives LRJ signaling, it will return ARJ signaling to Terminal 1, indicating that the conference reservation failed;

3i. When the meeting time arrives, the first-level GK1 sends ARQ signaling to the MCU, sends the terminal site information involved in the reserved meeting to the MCU, and commands the MCU to start the meeting.

3j. After the MCU receives the order of the first-level GK1, according to the information of the terminal site, it sends the Setup call signaling to the terminal 1, and then continues the follow-up Q.931, H.245, RTP and other protocol processing procedures (not described in detail in this invention) Description), so that terminal 1 joins the meeting;

3k. The conference information received by the MCU also includes the conference resources of the first-level GK2, so it sends the Setup call signaling to the first-level GK2, and the first-level GK2 forwards the Setup call signaling to Terminal 2, and then continues the subsequent Q.931, H.245, RTP and other protocol processing procedures, so that terminal 2 joins the conference.

The fourth type: conference reservation scheduling method between different top-level GKs

Please refer to Figure 7, which shows the scheduling method for meeting reservations between different top-level GKs. In this scheduling, the GKs involved are: first-level GK1, top-level GK1, first-level GK2, and top-level GK2, as follows:

4a. Terminal 1 requests to reserve a conference, and sends ARQ signaling with account number and password to first-level GK1;

4b. Level-1 GK1 initiates an authentication request Account Request message to the AAA server according to the user's account number and password;

4c. The AAA server authenticates the account number and password, and returns an Account Response message if the meeting is allowed;

4d. If the user is allowed to reserve a conference, the primary GK1 returns the ACF signaling. Otherwise return ARJ signaling rejection;

4e. Terminal 1 sends ARQ signaling with conference information to primary GK1;

4f. The first-level GK1 extracts conference information from the ARQ signaling, analyzes the conference information, and finds that the terminal 2 involved in the conference is not managed by the first-level GK1, and the first-level GK1 also knows which GK the conference site belongs to, so the first-level GK1 sends LRQ signaling with site resource request information to its top-level GK1;

4g. After receiving the LRQ signaling with the resource request of the venue, the top-level GK1 finds that the resource of the venue belongs to the management of the top-level GK2, and forwards the LRQ signaling to the top-level GK2;

4h. After receiving the LRQ signaling with the resource request of the venue, the top-level GK2 analyzes the resource information of the venue, judges that the resource of the venue belongs to the management of the first-level GK2, and forwards the LRQ signaling to the first-level GK2;

4i. After receiving the LRQ signaling with the site resource request, the first-level GK2 judges whether it is available according to the usage of the site resource, and if available, reserves it and returns the LCF signaling to the top-level GK2. If the site resource is unavailable, return the LRJ signaling to the top-level GK2;

4j. The top-level GK2 forwards the LCF or LRJ signaling returned by the first-level GK2 to the top-level GK1;

4k. The top-level GK1 forwards the LCF or LRJ signaling returned by the top-level GK2 to the first-level GK1;

4l. According to the resources managed by itself and the received LCF signaling, the first-level GK1 believes that all the site resources involved in the conference can be allocated successfully, records the conference resource information and the start and end time of the conference, and then returns the ACF signaling to Terminal 1, Indicates that the conference reservation is successful; if the first-level GK1 finds that its resources are insufficient or receives the LRJ signaling, it will return the ARJ signaling to Terminal 1, indicating that the conference reservation has failed;

4m. When the meeting time arrives, the first-level GK1 sends ARQ signaling to the MCU, sends the terminal information of the venue involved in the reserved meeting to the MCU, and orders the MCU to start the meeting;

4n. After receiving the command from the first-level GK1, the MCU sends the Setup call signaling to Terminal 1 according to the information of the terminal site, and then continues the subsequent Q.931, H.245, RTP and other protocol processing processes, so that Terminal 1 joins the conference ;

4o The conference information received by the MCU also includes the conference resources of the first-level GK2, so it sends the Setup call signaling to the top-level GK1;

4p The top-level GK1 forwards the Setup call signaling to the top-level GK2;

4q The top-level GK2 forwards it to the first-level GK2;

4r The first-level GK2 forwards it to Terminal 2, and then continues the subsequent Q.931, H.245, RTP and other protocol processing procedures, so that Terminal 2 joins the conference.

The fifth method: one terminal invites another terminal to join the conference

Please refer to Figure 8, which is a method for a terminal to invite another terminal to join a conference, as follows:

5a. Terminal 1 sends ARQ signaling with account number and password to first-level GK1 to invite Terminal 2 to join the conference;

5b. After receiving the ARQ signaling, the first-level GK1 sends the account number and password to the AAA server with Account Request;

5c. The AAA server authenticates the account and password, and returns an Account Response message if Terminal 1 is allowed to invite Terminal 2 to join the conference;

5d. Level-1 GK1 returns ACF signaling to Terminal 1, allowing Terminal 2 invited by it to join the conference;

5e. Terminal 1 sends ARQ signaling to invite Terminal 2 to join the conference to the primary GK1;

5f. The first-level GK1 receives the ARQ signaling and finds that the terminal 2 should join the conference on the MCU managed by the first-level GK2, and then sends the LRQ signaling with the information of the terminal 2 to the first-level GK2;

5g. The first-level GK2 checks that Terminal 2 is available, and then sends ARQ signaling with Terminal 2 information to the MCU;

5h. The MCU receives the ARQ signaling of the first-level GK2, sends the Setup call signaling to the terminal 2, and then performs the subsequent Q.931, H..245 and RTP protocol processing, and invites the terminal 2 to join the conference held on the MCU ;

5i. The first-level GK2 returns the LCF signaling to the first-level GK1;

5j. Level-1 GK1 returns the ACF signaling to Terminal 1, indicating that Terminal 2 is successfully invited to join the conference.

Type 6: A method for one terminal to make another terminal that has joined the conference leave the conference

Please refer to Figure 9, which is a method for a terminal to make another terminal that has joined the conference leave the conference, as follows:

6a. Terminal 1 sends ARQ signaling with account number and password to primary GK1;

6b. Level-1 GK1 sends Account Request signaling to the AAA server;

6c. The AAA server authenticates the account number and password, and returns Account Response signaling if terminal 1 is allowed to make terminal 2 leave the meeting;

6d. Level-1 GK1 returns the ACF signaling, allowing Terminal 1 to make Terminal 2 leave the conference;

6e. Terminal 1 sends ARQ signaling with terminal 2 information to primary GK1, requesting terminal 2 to leave the conference;

6f. The first-level GK1 finds that the terminal 2 belongs to the conference held on the MCU managed by the first-level GK2, and sends the LRQ signaling with the information of deleting the terminal 2 to the first-level GK2;

6g. The first-level GK2 sends the ARQ signaling to the MCU to make the terminal 2 leave the meeting;

6h. The MCU sends a Disconnect signaling to the terminal, and then performs the subsequent call end process, so that terminal 2 leaves the conference;

6i. The first-level GK2 returns the LCF signaling to the first-level GK1;

6j. The first-level GK1 returns the ACF signaling to Terminal 1, indicating that Terminal 2 is successfully separated from the conference.

Seventh: Scheduling method for conference reservation through GK's scheduling interface

Please refer to FIG. 10 , which shows a method for scheduling conference reservations through the scheduling interface of the GK. In the system of the present invention, each GK has a scheduling interface, and through the scheduling interface of the GK, the WEB Server, ICP or IP intelligent network can reserve a meeting.

The following is the method for ICP to reserve a conference through the scheduling interface of GK:

7a. The ICP requests to reserve a conference, and sends ARQ signaling with the account number and password to the first-level GK1;

7b. The first-level GK1 sends an authentication request Account Request message to the AAA server according to the user's account number and password;

7c. The AAA server authenticates the account number and password, and returns an Account Response message if the meeting is allowed;

7d. If the ICP conference reservation is allowed, the first-level GK1 returns the ACF signaling. Otherwise return ARJ signaling rejection;

7e. The ICP sends ARQ signaling with conference information to the primary GK1;

7f. The first-level GK1 extracts conference information from ARQ signaling, and performs resource scheduling calculations. If resources are sufficient, resource reservation is performed, and ACF signaling is returned to ICP, and the resource allocation and conference initiation of the reserved conference are recorded at the same time. information such as start and end times. If the resources are insufficient, the primary GK1 returns ARJ signaling;

7g. When the meeting time arrives, the first-level GK1 sends ARQ signaling to the MCU, sends the terminal site information involved in the meeting to the MCU, and orders the MCU to start the meeting;

7h. After receiving the command from the first-level GK1, the MCU sends Setup call signaling to all conference terminals according to the terminal site information, and establishes a call with the terminals, so that all terminals join the conference.

Claims (15)

1. the conference dispatching system of an IP network video conferencing, include: the MCU that controls for the H.323 terminal of user meeting, to terminal H.323, to be connected on it MCU and H.323 the one-level GK that manages of terminal, to being connected to one-level GK, MCU and the top GK that manages of terminal H.323 on it, and these equipment all are the equipment of agreement defined H.323, wherein, be connected with one-level GK on each top GK, be connected with MCU and terminal H.323 on each one-level GK, it is characterized in that: also be connected with MCU and terminal H.323 on each top GK; Between top GK and MCU, between one-level GK and MCU, top GK and H.323 terminal room, one-level GK and H.323 between terminal room, top GK, H.323 the communication protocol between one-level GK, between one-level GK and the top GK all adopt standard agreement to expand; Top GK and one-level GK carry out conference dispatching as conference dispatching equipment.

2. the conference dispatching system of IP network video conferencing as claimed in claim 1 is characterized in that: between the one-level GK between top GK, under the same top GK is directly interconnective.

3. the conference dispatching system of IP network video conferencing as claimed in claim 1 or 2 is characterized in that: further be provided with authentication, dispatch interface on each top GK and each one-level GK.

4. one kind is utilized the described system of claim 1 to be implemented in the method for carrying out conference reservation under the same one-level GK, it is characterized in that this method comprises the steps:

1a. meeting of terminal request reservation sends the access demand signalling that has number of the account and password to an one-level GK;

1b. this one-level GK sends out authentication request message according to user's number of the account and password to aaa server;

1c.AAA server carries out authentication to number of the account and password, if allow its meeting, and return authentication response message then;

1d. if allow user's preset conference, then this one-level GK returns the admission confirm signaling, otherwise returns the admission reject signaling;

1e. this terminal sends the access demand signalling that has conferencing information to this one-level GK;

1f. this one-level GK extracts conferencing information from insert demand signalling, and carry out scheduling of resource and calculate, if resource is enough, then carry out resource reservation, and return the admission confirm signaling and give this terminal, write down the resource allocation conditions and the meeting initial sum termination time information of this preset conference simultaneously; If inadequate resource, then this one-level GK returns the admission reject signaling;

1g. when the meeting time of holding arrived, this one-level GK sent to MCU and inserts demand signalling, the terminal that meeting is related to can field information send to MCU, and order MCU begins meeting;

1h.MCU after receiving the order of this one-level GK,, call signaling is set to this terminal transmission according to terminal meeting field information, set up with this terminal and call out, make this joining meeting to terminal.

5. method of carrying out conference reservation under same one-level GK as claimed in claim 4 is characterized in that: step (1a), (1e), (1f) and (1g) in the access demand signalling be: the ARQ signaling; Step (1d) and (1f) in the admission confirm signaling be: the ACF signaling; Step (1d) and (1f) in the admission reject signaling be: the ARJ signaling; Authentication request message in the step (1b) is: Account Request message; Authentication response message in the step (1c) is: AccountResponse message; The call signaling that is provided with (1h) is: the setup signaling.

6. a method of utilizing the described system of claim 1 to be implemented in the scheduling of the conference reservation between different GK under the same top GK is characterized in that this method comprises the steps:

3a. meeting of first terminal request reservation sends the access demand signalling that has number of the account and password to the first one-level GK;

3b. the first one-level GK initiates authentication request message according to user's number of the account and password to aaa server;

3c.AAA server carries out authentication to number of the account and password, if allow its meeting, and return authentication response message then;

3d. if allow user's preset conference, then the first one-level GK returns the admission confirm signaling, otherwise returns the admission reject signaling;

3e. first terminal sends the access demand signalling that has conferencing information to the first one-level GK;

3f. the first one-level GK extracts conferencing information from insert demand signalling, conferencing information is analyzed, and finds that meeting relates to other meeting-place and belongs to second one-level GK management, just sends the meeting-place demand signalling that has the meeting-place resource request information to the second one-level GK;

3g. after the second one-level GK receives the meeting-place demand signalling that has the meeting-place resource request information,, judge whether availablely,, and return the meeting-place and confirm that signaling gives the first one-level GK if available then reserve according to the operating position of meeting-place resource; If the meeting-place resource is unavailable, then returns the meeting-place rejection signaling and give the first one-level GK;

3h. the first one-level GK is except distributing self-administered resource, after the meeting-place affirmation signaling of receiving, think that all meeting meeting-place resource allocations are successful, record conferencing resource information and initial termination time of meeting, return the admission confirm signaling to first terminal then, the success of expression conference reservation; If the first one-level GK finds the inadequate resource of oneself or receives the meeting-place rejection signaling, then return the admission reject signaling and give first terminal, the failure of expression conference reservation;

3i. when the meeting time of holding arrived, the first one-level GK sent to MCU and inserts demand signalling, the terminal that preset conference is related to can field information send to MCU, and order MCU begins meeting;

3j.MCU receive insert demand signalling after, can field information according to terminal, send to first terminal call signaling be set, continue then follow-up Q.931, H.245, the Real-time Transport Protocol processing procedure, thereby make first joining meeting to terminal;

3k.MCU also comprise the conferencing resource of the second one-level GK in the conferencing information of receiving, just send call signaling is set to the second one-level GK, the second one-level GK is transmitted to second terminal call signaling is set, continue then follow-up Q.931, H.245, the Real-time Transport Protocol processing procedure, thereby make second joining meeting to terminal.

7. the method for conference reservation under the same top GK as claimed in claim 6 between different GK scheduling is characterized in that: step (3a), (3e), (3f), (3i) and (3j) in the access demand signalling be: the ARQ signaling; Step (3d) and (3h) in the admission confirm signaling be: the ACF signaling; Step (3d) and (3h) in the admission reject signaling be: the ARJ signaling; Step (3j) and (3k) in the call signaling that is provided be: the setup signaling; Step (3f) and (3g) in the meeting-place demand signalling be: the LRQ signaling; Step (3g) and (3h) in the meeting-place confirm that signaling is: the LCF signaling; Step (3g) and (3h) in the meeting-place rejection signaling be: the LRJ signaling; Authentication request message in the step (3b) is: Account Request message; Authentication response message in the step (3c) is: AccountResponse message.

8. a method of utilizing the described system of claim 1 to be implemented in the conference reservation scheduling between different top GK is characterized in that this method comprises the steps:

4a. meeting of first terminal request reservation sends the access demand signalling that has number of the account and password to the first one-level GK;

4b. the first one-level GK initiates authentication request message according to user's number of the account and password to aaa server;

4c.AAA server carries out authentication to number of the account and password, if allow its meeting, and return authentication response message then;

4d. if allow user's preset conference, then the first one-level GK returns the admission confirm signaling; Otherwise return the admission reject signaling;

4e. first terminal sends the access demand signalling that has conferencing information to the first one-level GK;

4f. the first one-level GK extracts conferencing information from insert demand signalling, conferencing information is analyzed, find that second terminal that meeting relates to does not belong to first one-level GK management, and the first one-level GK does not know which GK management this meeting-place belongs to yet, so the first one-level GK just sends the meeting-place demand signalling that has the meeting-place resource request information to the first top GK of oneself;

4g. after the first top GK receives the meeting-place demand signalling that has the meeting-place resource request, find that the meeting-place resource belongs to the second top GK management, just is transmitted to the second top GK to this meeting-place demand signalling;

4h. after the second top GK receives the meeting-place demand signalling that has the meeting-place resource request, analyze the meeting-place resource information, judge that this meeting-place resource belongs to second one-level GK management, just is transmitted to the second one-level GK to this meeting-place demand signalling;

4i. after the second one-level GK receives the meeting-place demand signalling that has the meeting-place resource request,, judge whether availablely,, and return the meeting-place and confirm that signaling gives the second top GK if available then reserve according to the operating position of meeting-place resource; If the meeting-place resource is unavailable, then returns the meeting-place rejection signaling and give the second top GK;

4j. the meeting-place that the second top GK returns the second one-level GK confirms that signaling or meeting-place rejection signaling are transmitted to the first top GK;

4k. the meeting-place that the first top GK returns the second top GK confirms that signaling or meeting-place rejection signaling are transmitted to the first one-level GK;

4l. the first one-level GK is according to self-administered resource, and the meeting-place of receiving affirmation signaling, think that all meeting-place resources that meeting relates to can be allocated successfully, record conferencing resource information and initial termination time of meeting, return the admission confirm signaling to first terminal then, the success of expression conference reservation; If the first one-level GK finds the inadequate resource of oneself or receives the meeting-place rejection signaling, then return the admission reject signaling and give first terminal, the failure of expression conference reservation;

4m. when the meeting time of holding arrived, the first one-level GK sent to MCU and inserts demand signalling, the meeting-place end message that preset conference is related to sends to MCU, and order MCU begins meeting;

After (4n) .MCU receives and inserts demand signalling, can field information according to terminal, send to first terminal call signaling be set, continue then follow-up Q.931, H.245, the Real-time Transport Protocol processing procedure, thereby make first joining meeting to terminal;

(4o) also comprise the conferencing resource of the second one-level GK in the conferencing information that MCU receives, just send call signaling is set to the first top GK;

(4p) the first top GK is transmitted to the second top GK call signaling is set;

(4q) the second top GK is transmitted to the second one-level GK again;

(4r) the second one-level GK is transmitted to second terminal again, continue then follow-up Q.931, H.245, the Real-time Transport Protocol processing procedure, make second joining meeting to terminal.

9. the method for conference reservation between the top GK of difference as claimed in claim 8 scheduling is characterized in that: step (4a), (4e), (4f), (4m) and (4n) the access demand signalling be: the ARQ signaling; Step (4d) and (4l) in the admission confirm signaling be: the ACF signaling; Step (4d) and (4l) in the admission reject signaling be: the ARJ signaling; Step (4n), (4o) and (4p) in the call signaling that is provided be: the setup signaling; Step (4f), (4g), (4h) and (4i) in the meeting-place demand signalling be: the LRQ signaling; Step (4i), (4j), (4k) and (4l) in the meeting-place confirm that signaling is: the LCF signaling; Step (4i), (4j) and (4k) in the meeting-place rejection signaling be: the LRJ signaling; Authentication request message in the step (4b) is: Account Request message; Authentication response message in the step (4c) is: Account Response message.

10. a method of utilizing terminal of claim 1 described system realization to invite another joining meeting to terminal is characterized in that this method comprises the steps:

5a. first terminal sends the access demand signalling that has number of the account and password to the first one-level GK, to invite second terminals joining the conference;

5b. the first one-level GK sends to aaa server to number of the account and password with authentication request message after receiving and inserting demand signalling;

5c.AAA server carries out authentication to number of the account and password, if allow first terminal to invite second terminals joining the conference, and return authentication response message then;

5d. the first one-level GK returns the admission confirm signaling to first terminal, allows second terminals joining the conference of its invitation;

5e. first terminal sends the access demand signalling of inviting second terminals joining the conference to the first one-level GK;

5f. the first one-level GK receives the access demand signalling, finds that second terminal should add the meeting on the MCU that belongs to second one-level GK management, just sends the meeting-place demand signalling that has second end message to the second one-level GK;

5g. the second one-level GK checks that second terminal is in upstate, just sends the access demand signalling that has second end message to MCU;

5h.MCU receive the access demand signalling of the second one-level GK, send to second terminal call signaling be set, carry out then follow-up Q.931, H.245 with the Real-time Transport Protocol processing procedure, invite second terminal to be added in the meeting of holding on the MCU;

5i. returning the meeting-place, the second one-level GK confirms that signaling is to the first one-level GK;

5j. the first one-level GK returns the admission confirm signaling and gives first terminal, the success of second terminals joining the conference is invited in expression.

11. a terminal as claimed in claim 10 is invited the method for another joining meeting to terminal, it is characterized in that: step (5a), (5b), (5e), (5f), (5g) and (5h) in the access demand signalling be: the ARQ signaling; Step (5d) and (5j) in the admission confirm signaling be: the ACF signaling; The call signaling that is provided with in the step (5h) is: the setup signaling; Meeting-place demand signalling in the step (5f) is: the LRQ signaling; Meeting-place in the step (5i) confirms that signaling is: the LCF signaling; Authentication request message in the step (5b) is: Account Request message; Authentication response message in the step (5c) is: Account Response message.

12. one kind is utilized the described system of claim 1 to realize that a terminal makes another terminal of having joined leave the method for meeting, is characterized in that this method comprises the steps:

6a. first terminal sends the access demand signalling that has number of the account and password to the first one-level GK;

6b. the first one-level GK sends authentication request message to aaa server;

6c.AAA server carries out authentication to number of the account and password, if allow first terminal to make second terminals leaving the conference, and return authentication response message then;

6d. the first one-level GK returns the admission confirm signaling, allows first terminal to make second terminals leaving the conference;

6e. first terminal sends the access demand signalling that has second end message to the first one-level GK, request makes second terminal leave meeting;

6f. the first one-level GK finds that second terminal belongs to the meeting of holding on the MCU of second one-level GK management, just sends to the second one-level GK to have the meeting-place demand signalling of deleting second end message;

6g. sending to MCU, the second one-level GK make the access demand signalling of second terminals leaving the conference to MCU;

Disconnect signaling 6h.MCU just send, carry out follow-up end of calling process then, make second terminal leave meeting to terminal;

6i. returning the meeting-place, the second one-level GK confirms that signaling is to the first one-level GK;

6j. the first one-level GK returns the admission confirm signaling and gives first terminal, represents successfully to make second terminals leaving the conference.

13. a terminal as claimed in claim 12 makes another terminal of having joined leave the method for meeting, it is characterized in that: step (6a), (6e) and (6g) in the access demand signalling be: the ARQ signaling; Step (6d) and (6j) in the admission confirm signaling be: the ACF signaling; Disconnection signaling in the step (6h) is: the disconnect signaling; Meeting-place demand signalling in the step (6f) is: the LRQ signaling; Meeting-place in the step (6i) confirms that signaling is: the LCF signaling; Authentication request message in the step (6b) is: Account Request message; Authentication response message in the step (6c) is: AccountResponse message.

14. one kind is utilized the described system of claim 1 to realize the method for carrying out the scheduling of conference reservation by the dispatch interface of GK, it is characterized in that this method comprises the steps:

7a.ICP meeting of request reservation sends the access demand signalling that has number of the account and password to an one-level GK;

7b. this one-level GK initiates authentication request message according to user's number of the account and password to aaa server;

7c.AAA server carries out authentication to number of the account and password, if allow its meeting, and return authentication response message then;

7d. if allow the ICP preset conference, then this one-level GK returns the admission confirm signaling.Otherwise return the admission reject signaling;

7e.ICP send the access demand signalling that has conferencing information to this one-level GK;

7f. this one-level GK extracts conferencing information from insert demand signalling, and carry out scheduling of resource and calculate, if resource is enough, then carry out resource reservation, and return the admission confirm signaling and give ICP, write down information such as the resource allocation conditions of this preset conference and meeting initial sum termination time simultaneously; If inadequate resource, then this one-level GK returns the admission reject signaling;

7g. when the meeting time of holding arrived, this one-level GK sent to MCU and inserts demand signalling, the terminal that meeting is related to can field information send to MCU, and order MCU begins meeting;

7h.MCU after receiving the order of this one-level GK, can field information according to terminal, send to the terminal of all meetings call signaling is set, set up with terminal and call out, make all joining meeting to terminal.

15. method of carrying out the scheduling of conference reservation by the dispatch interface of GK as claimed in claim 16 is characterized in that: step (7a), (7e), (7f) and (7g) in the access demand signalling be: the ARQ signaling; Step (7d) and (7f) in the admission confirm signaling be: the ACF signaling; Step (7d) and (7f) in the admission reject signaling be: the ARJ signaling; The call signaling that is provided with in the step (7h) is: the setup signaling; Authentication request message in the step (7b) is: Account Request message; Authentication response message in the step (7c) is: Account Response message.

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