CN102571188A - Signaling processing method and system for satellite communication network with satellite switch capability - Google Patents

Abstract

The invention discloses a signaling processing method and system in a satellite communication network with on-star switching capability, including an on-star part and a ground part; the on-star part includes a signaling group identification and sorting module, an entrance signaling notification module, Signaling processing module, on-board forwarding table connection table resource table management module, and export signaling notification module; the ground part includes signaling and control information interface, ground signaling processing module, and ground forwarding table connection table resource table management module; The processing method includes a signaling sorting step, a signaling processing step and an on-board and ground synchronization step. The present invention uses the idea of satellite-ground cooperation to process signaling information. Compared with ground processing, the processing delay will be significantly reduced by using the signaling processed on the satellite; it can make full use of the computing power on the satellite to provide fast and timely information for high-priority services. The connection establishment service can also give full play to the role of the existing ground control center and make up for the shortcomings of insufficient computing power on the star that limits the call arrival rate.

Description

Signaling processing method and system in satellite communication network with on-board switching capability

technical field

The invention relates to a signaling processing method in a satellite communication network with on-board switching capability, and belongs to the technical field of communication.

Background technique

Satellite communication technology has now entered the era of on-board exchange, that is, user information is forwarded on satellites. However, limited to the processor technology that can be used on the satellite, it is more difficult, and the signaling used to establish the connection between the two parties still needs to be processed in the ground control center. The usual processing process is as follows: when the ground user initiates a call and the signaling packet is transmitted to the satellite, the satellite port processing module identifies it, detects the signaling packet, and forwards the signaling packet through the dedicated control beam directly with the ground control center To the control center, the signaling processing module on the control center analyzes the signaling request, determines the route according to the resource occupation, allocates network resources, and returns the processing result to the satellite in the form of a command, and changes the routing forwarding table on the satellite. And the signaling is passed to the next signaling point.

Since communication satellites are often in high orbits, the satellite-to-ground communication delay is close to 300ms, and the up-and-down round-trip delay is about one second; if the communication connection involves multiple satellites, the round-trip time between the satellite and the ground processing center The delay can reach several seconds. This is unacceptable for some high-priority services that are very sensitive to delay. The best solution is to maintain the network resource table and communication connection state table on the satellite, and process all signaling requests. However, due to the heavy load of signaling task processing and the key role in the capacity and reliability of the entire communication network, the current on-board signaling processing chips and memories are difficult to support.

Contents of the invention

Considering the development of satellite communication technology, space-based satellite communication network will soon appear and be put into use; although the satellite cannot completely process all signaling requests, it can have a certain signaling processing capability; in the near future, there will be no Satellites with on-board signaling processing capabilities, satellites with partial signaling processing capabilities, and new satellites with full signaling processing capabilities may coexist in a satellite communication network. Therefore, the purpose of the present invention is to provide a signaling processing method and system in which on-board and ground signaling processing capabilities are integrated, which can not only take advantage of the advantages of small time delay and low cost of on-board signaling processing, but also utilize ground control The center makes up for the shortcomings of small signaling processing capacity and difficult state maintenance on the satellite, so as to improve the satellite network's ability to support delay-sensitive services and meet the needs of the gradual evolution of satellite communication networks. At present, some satellites have on-board signaling processing capabilities. From the perspective of technical feasibility, the satellite-ground cooperation method can make full use of on-board computing capabilities and provide fast and timely connection establishment services for high-priority services. On the one hand, it can also give full play to the role of the existing ground control center to make up for the shortcomings of insufficient computing power on the star that limits the call arrival rate.

In order to achieve the above goals, it is necessary to focus on solving the following technical problems:

1 How does the input port processing module of the satellite switching system judge whether the signaling information should be processed on the satellite or on the ground?

2 How to ensure that the use of resource-specific tables by satellite-ground collaborative processing is synchronized?

3 Can the reliability of such a signaling system be guaranteed?

The present invention adopts following technical scheme to solve the above-mentioned technical problems:

The signaling system in the satellite communication network with on-board switching capability, including the on-board part and the ground part; the on-board part includes a signaling packet identification and sorting module, an ingress signaling notification module, an on-board signaling processing module, and a forwarding table Connection table resource table management module, export signaling notification module; ground part includes signaling and control information interface, ground signaling processing module, forwarding table connection table resource table management module;

Signaling group identification and sorting module: used to identify signaling, sort according to the identification result, and determine the processing method of signaling;

Ingress signaling notification module: For the signaling that is processed on the star, the notification information is sent to the ground part through this module, and the ground is notified of the processing method and related parameters of the signaling;

On-board signaling processing module: used for on-board processing of signaling;

On-star/ground forwarding table, connection table and resource table module: store signaling related information;

Egress signaling notification module: After the processing on the star is completed, a notification message is sent to the ground part through this module, notifying the ground part of the signaling processing completion, and notifying the ground part of the relevant parameters of the signaling;

Signaling and control information interface: obtain the interaction information between the satellite and the ground;

Ground signaling processing module: used for ground processing of signaling.

In the system, the signaling packet identification and sorting module identifies information including: message type, message ID and delay identification. The signaling group identification sorting module maintains a sorting table, the module reads the message ID of the incoming signaling, searches the sorting table, and determines whether the signaling cell is a subsequent signaling cell or a new signaling cell; The sorting table entry includes signaling message ID and processing mode; the signaling packet identification and sorting module has a timer function.

In the system, the ingress signaling notification module, the notification information includes input VPI/VCI, bandwidth carrying capacity, input port number, source address, destination address, connection identifier and signaling processing method;

The system, the on-board signaling processing module, is specifically used to: check the correctness of the signaling, check the calling number and called number, find the location of the user according to the user number table, allocate resources to the user, allocate VPI/VCI, send a CALLPROCEEDING message to the calling party, and send a SETUP message to the called party; the on-board signaling processing module has a timer function.

In the system, in the star/ground forwarding table, connection table and resource table module, the information stored in the forwarding table includes the input and output VPI/VCI, input and output port numbers of the signaling; the connection table stores the connection identification of the signaling , bandwidth carrying capacity, source address and destination address information; the resource table stores the resources currently in use and manages the resources.

The system, the export signaling notification module, the notification message includes: output VPI/VCI, bandwidth carrying capacity, output port number, source address, destination address and connection identification; the system, the ground signaling processing Module, the functions of this module include checking the correctness of the signaling, checking the calling number and called number, finding the location of the user according to the user number table, allocating resources to the user, allocating VPI/VCI, sending a CALLPROCEEDING message to the calling party, and sending a message to the calling party. The called party sends a SETUP message.

A signaling processing method in a satellite communication network with on-board switching capability, a signaling sorting step, a signaling processing step, and a ground synchronization step on a star; the signaling sorting step: when multiple signalings arrive at the satellite, the The signaling packet identification and sorting module checks the message category, message ID, and delay identifier in the signaling cell format, and considers the satellite load at the same time, and splits the signaling. Ground processing; the signaling processing step: the calling user and the called user establish a connection through the signaling system, perform data transmission, and then release the connection through the signaling system; the ground synchronization step on the star: maintain the star-ground forwarding table, Synchronization of connection tables and resource tables.

In the processing method, the signaling sorting step is specifically as follows:

(1) The signaling group identification and sorting module checks the message category identification in the signaling cell format, if it is the relevant information of the release connection request, perform step 6; otherwise, perform step 2;

(2) The signaling group identification sorting module checks the message ID mark in the signaling cell format, if it is a new message ID, i.e. new signaling, execute step 3; otherwise, execute step 4;

(3) The signaling packet identification and sorting module checks the delay identifier in the signaling cell format, and if the processing delay requirement is high, perform step 5; otherwise, perform step 6;

(4) The signaling group identification sorting module searches the sorting table, if there is a corresponding entry in the table, perform on-board processing, and the sorting ends; otherwise, perform step 6;

(5) Check the current load of the on-board processor, if the load on the on-board processor is light, add this item in the sorting table, forward the signaling to the on-board signaling processing module for on-board processing, and the sorting ends; Otherwise, go to step 6;

(6) The signaling is forwarded to the ground part for ground processing, and the sorting ends.

In the processing method, the on-board and ground synchronization steps are specifically as follows:

(1) The signaling group identification sorting module completes the identification, and determines that the signaling is processed on the star; the satellite transmits a notification message to the ground through the control dedicated channel between the entrance signaling notification module and the satellite ground; The notification message includes input VPI/VCI, bandwidth carrying capacity, input port number, source address, destination address, connection identifier and signaling processing method; when the notification message is sent, the satellite starts a timer;

(2) After the ground receives the message, the ground forwarding table, connection table, and resource table store the input VPI/VCI, bandwidth carrying capacity, input port, source address, destination address, connection identifier, and signaling processing of the signaling mode, while sending a response message to the satellite network;

(3) If the satellite network receives the response message before the timer expires, stop the timer, otherwise resend the message. The number of timer retransmissions depends on the priority identifier in the signaling cell format. If the priority is high, it can be retransmitted multiple times; otherwise, the connection will be released if the timer still times out after one retransmission;

(4) The satellite checks the message category in the signaling cell format through the signaling group identification sorting module, if it receives the CONNECT ACK message sent by the user, it determines that the processing on the star has been completed; Make the notification module and the control dedicated channel send a notification message to the ground; the notification message includes the output VPI/VCI value, bandwidth carrying capacity, output port number, source address, destination address, and connection identification of the processed signaling;

(5) After the ground receives the message, save the output VPI/VCI, bandwidth carrying capacity, output port number, source address, destination address, and connection identifier in the ground forwarding table, connection table, and resource table, and send a message to the satellite at the same time Response message. Since some resources on the satellite will be occupied after the connection is established, the response message should include supplementary resources provided by the ground;

(6) If the satellite network receives a response message before the timer expires, the timer is stopped; otherwise, the message is resent; if the resend still fails, the corresponding resources are forcibly reclaimed.

The present invention uses the idea of satellite-ground cooperation to process signaling information. Compared with ground processing, the processing time delay can be greatly reduced by using the signaling processed on the satellite. On the one hand, the present invention can make full use of the on-board computing power to provide fast and timely connection establishment services for high-priority services; rate disadvantages. The present invention can not only give full play to the advantages of small delay and low cost of on-board signaling processing, but also make up for the shortcomings of small on-board signaling processing capacity and difficult state maintenance by using the ground control center, so as to improve the satellite network's sensitivity to time-delay business support capabilities, and meet the needs of the gradual evolution of the satellite communication network.

Description of drawings

Fig. 1 is the cell structure of multi-cell signaling format;

Fig. 2 is a flow chart of the satellite signaling processing module;

Figure 3 is a diagram of the satellite-ground coordination module;

Fig. 4 is a flow chart of message transfer for establishing two signaling connections;

Fig. 5 is a flow chart of signaling connection release message delivery.

Detailed ways

The present invention will be described in detail below in conjunction with specific embodiments.

Example 1

Without loss of generality, the following description takes the on-board ATM switching system as an example, and its on-board signaling system can use two signaling formats: single-cell signaling and multi-cell signaling. The single cell format is a simplified ATM signaling, which limits the signaling packet of a message to be transmitted in one cell (the length of the ATM switching cell packet on the star is not limited to 53 bytes). At the same time, it is required to add a delay and priority option in the signaling cell format, and the user fills in according to the delay and priority requirements when sending. The length of the multi-cell format signaling packet is not limited, and the message is divided and carried by multiple signaling cells through the signaling adaptation mechanism. 1 is a multi-cell signaling cell structure, the cell format of the present invention should include message category (SETUP, CALL PROCEEDING, CONNECT, CONNECT ACK, ALERTING, RELEASE, RELEASECOMPLETE), message ID, delay identification and priority logo. The message ID is used to identify whether the signaling cell is a subsequent signaling cell or a new signaling cell, and the message ID, delay identifier and priority identifier are filled in by the user according to requirements. The present invention adopts the multi-cell signaling format.

The signaling processing system in the satellite communication network with on-board switching capability includes: on-board part and ground part. The on-board part includes a signaling packet identification and sorting module, an ingress signaling notification module, an on-board signaling processing module, a forwarding table connection table resource table management module, an egress signaling notification module, a timer module and a sorting table storage module; The ground part includes a signaling and control information interface, a ground signaling processing module, a forwarding table connection table resource table management module, and a timer module.

The signaling processing method in the satellite communication network with on-board switching capability includes: a signaling sorting step, a signaling processing step and an on-star ground synchronization step.

Signaling sorting step: with reference to Fig. 2 is the flow chart of satellite signaling processing module, when the signaling of a plurality of messages arrives at satellite, described signaling group identification sorting module checks message category, message ID in signaling cell format and time-delay identification, while considering the load of the satellite, the signaling is split and processed, part of the signaling is processed on the satellite, and the other part is processed on the ground.

The signaling sorting steps are as follows:

(1) The signaling group identification and sorting module checks the message category identification in the signaling cell format, if it is the relevant information of the release connection request, perform step 6; otherwise, perform step 2;

(2) The signaling group identification sorting module checks the message ID mark in the signaling cell format, if it is a new message ID, i.e. new signaling, execute step 3; otherwise, execute step 4;

(3) The signaling packet identification and sorting module checks the delay identifier in the signaling cell format, and if the processing delay requirement is high, perform step 5; otherwise, perform step 6;

(4) The signaling group identification sorting module searches the sorting table, if there is a corresponding entry in the table, perform on-board processing, and the sorting ends; otherwise, perform step 6;

(5) Check the current load of the on-board processor, if the load on the on-board processor is light, add this item in the sorting table, forward the signaling to the on-board signaling processing module for on-board processing, and the sorting ends; Otherwise, go to step 6;

(6) The signaling is forwarded to the ground part for ground processing, and the sorting ends.

After the connection establishment or connection release channel is established, the signaling is transmitted along the channel. In the case of multi-hop communication, the above sorting process is performed at each satellite signaling processing point. Since the conditions of each signaling point are different, there will be two processing methods on the satellite or on the ground during the establishment of a signaling connection in a connection. For other signaling processing processes after the connection is established, such as the connection release process, since the delay requirement is not high, in order to reduce the satellite load, the present invention places it on the ground.

On-satellite and ground synchronization steps: Referring to FIG. 3 , in the present invention, since some satellites have on-satellite processing capabilities, signaling connection establishment can be completed on-satellite. At the same time, in order to reduce the load of the satellite, all signaling connection releases are processed on the ground. In order to establish the connection on the star and the connection release on the ground to transmit the signaling correctly, it is necessary to keep the synchronization of the star-ground forwarding table, connection table and resource table.

The synchronization of the signaling system in the present invention can be realized through two steps. The first step is resource allocation. Through the negotiation between the satellite and the ground, the ground allocates a part of resources to the satellite for on-board processing. During this period, whether these resources are used or not, these resources are not used on the ground.

The user sends signaling to the satellite network through a physical link. When the signaling reaches the satellite, the above steps are performed first, and then the subsequent steps are performed according to the on-board processing and the ground processing respectively. The satellite and ground synchronization steps are as follows:

(1) The signaling group identification sorting module completes the identification, and determines that the signaling is processed on the star; the satellite transmits a notification message to the ground through the control dedicated channel between the entrance signaling notification module and the satellite ground; The notification message includes input VPI/VCI, bandwidth carrying capacity, input port number, source address, destination address, connection identifier and signaling processing method; when the notification message is sent, the satellite starts a timer;

(2) After the ground receives the message, the ground forwarding table, connection table, and resource table store the input VPI/VCI, bandwidth carrying capacity, input port, source address, destination address, connection identifier, and signaling processing of the signaling mode, while sending a response message to the satellite network;

(3) If the satellite network receives the response message before the timer expires, stop the timer, otherwise resend the message. The number of timer retransmissions depends on the priority identifier in the signaling cell format. If the priority is high, it can be retransmitted multiple times; otherwise, the connection will be released if the timer still times out after one retransmission;

(4) The satellite checks the message category in the signaling cell format through the signaling group identification sorting module, if it receives the CONNECT ACK message sent by the user, it determines that the processing on the star has been completed; Make the notification module and the control dedicated channel send a notification message to the ground; the notification message includes the output VPI/VCI value, bandwidth carrying capacity, output port number, source address, destination address, and connection identification of the processed signaling;

(5) After the ground receives the message, save the output VPI/VCI, bandwidth carrying capacity, output port number, source address, destination address, and connection identifier in the ground forwarding table, connection table, and resource table, and send a message to the satellite at the same time Response message. Since some resources on the satellite will be occupied after the connection is established, the response message should include supplementary resources provided by the ground;

(6) If the satellite network receives a response message before the timer expires, the timer is stopped; otherwise, the message is resent; if the resend still fails, the corresponding resources are forcibly reclaimed.

If the retransmission still fails, the corresponding resources are forcibly recovered.

Through the above steps, the synchronization of the forwarding table, resource table, and connection table between the star and the ground is realized.

For the signaling that is processed on the ground, in order to reduce the processor load on the star, the connection release is still performed on the ground, and there is no need to save its information on the star. In multi-hop communication, there will be two processing methods on the satellite or on the ground during the establishment of the signaling connection in a connection.

The reliability of the signaling system is realized through timers. The timer is set to prevent one end from falling into an infinite waiting loop after sending a message. If the timer is not used, the sender will always be in a waiting state after sending the message. At this time, the network resources will be occupied all the time, which will increase the load on the network, and may fall into an infinite loop. In severe cases, the system may crash. In the present invention, the message sending end starts the corresponding timer immediately after sending the message, and stops the timer if a corresponding response is received before the timer expires; otherwise, resends the message and restarts the timer or releases network resources.

Example 2

In this embodiment, the actual situation of communication between users is taken as an example to illustrate the idea of the present invention. Firstly, a connection is established by using a signaling system. If there are multiple calls, multiple signalings are used for connection. In this embodiment, two signalings are used for description. When the two signalings arrive at the satellite signaling packet identification and sorting module, the module directly checks the message type and delay identifier of the signaling cell format, and at the same time judges the satellite or ground processing according to the load of the satellite processor. If on-board processing is performed, the signaling is forwarded to the satellite signaling processing module; for ground processing, the signaling is forwarded to the ground signaling processing equipment. Figures 4 and 5 are the connection establishment and release processes respectively. The process is described in detail below.

(1) The calling user initiates two calls and sends a SETUP request to establish a connection at the same time. Signaling 1 and Signaling 2 are transmitted through a specific signaling channel (steps 1, 2 in Fig. 4).

(2) The two signalings are first delivered to the signaling group identification sorting module, which checks the delay identification provided by the signaling cell format, and if the processing delay of the two signalings is too large, perform ground processing; The signaling processing delay is relatively small, and the on-board processor load is light, and the on-board processing is performed; assuming that the processing delay of signaling 1 is small, the processing delay of signaling 2 is large, and the load of the on-board processor is light, then the signaling 1 On-board processing is performed, and signaling 2 is processed on the ground. Describe in detail the third case.

(3) For signaling 1, satellite 1 recognizes that the signaling should be processed on the satellite, so satellite 1 processes the signaling, checks the correctness of the signaling, and checks the calling number and called number. Find the user's location, allocate resources to the user, allocate VPI/VCI, then send a CALLPROCEEDING message (step 3 in Figure 4) to the calling party, and send a SETUP connection establishment message to the satellite 2 (step 4 in Figure 4).

(4) Satellite 1 recognizes that Signaling 2 is suitable for ground processing, and forwards the signaling to a dedicated signaling earth station (step 5 in Figure 4). Dedicated signaling processing The earth station receives and processes the signaling, checks the correctness of the signaling, and checks the calling number and called number, finds the location of the user according to the user number table, allocates resources to the user, and allocates VPI/VCI , and then send back a CALLPROCEEDING message to the calling party (steps 6-7 in Figure 4).

(5) For signaling 1, satellite 2 receives and processes the signaling, first returns a CALLPROCEEDING message to satellite 1 (step 8 in Figure 5), and then sends a SETUP message to the called user (step 9 in Figure 5) .

(6) At the same time, for signaling 2, the dedicated signaling earth station sends SETUP information to the called party through satellite 2. (10-11 in Figure 4).

(7) For signaling 1, the called user sends back a CALL PROCEEDING message and a ringing message to the satellite 2 (steps 12 and 13 in FIG. 4 ). Satellite 2 receives the ringing message and transmits the ringing message to satellite 1 (step 14 in FIG. 4 ), and at the same time, satellite 1 transmits the ringing message to the calling user (step 15 in FIG. 4 ).

(8) For signaling 2, the called party first sends back a CALLPROCEEDING message and a ringing message (steps 16-17 and 18-19 in Fig. 4) to the dedicated signaling earth station; the satellite dedicated signaling earth station receives the ringing message Send back to the calling user immediately afterwards (step 20-21 in Fig. 4).

(9) For signaling 1, after the called user checks its own number and resource conditions, it returns a CONNECT message to the network (step 22 in FIG. 4 ). After receiving the CONNECT message, the satellite 2 signaling processing equipment sends back the CONNECT ACK message (step 23 in Fig. 4) to the called party, and sends an update message (step 24 in Fig. 4) to the ground; meanwhile, sends the CONNECT ACK message to the satellite 1 message (step 25 among Fig. 4), satellite 1 sends CONNECT ACK message (step 26 among Fig. 4) to satellite 2, and sends update message (step 27 among Fig. 4) to dedicated signaling earth station.

(10) For signaling 1, satellite 1 sends a CONNECT message to the calling party, and the calling party sends a CONNECT ACK message to satellite 1 (steps 28 and 29 in Figure 4). So far, the star handles the establishment of the connection between the calling party and the called party.

(11) For signaling 2, after the called user checks its own number and resource conditions, it returns a connection message to the network (steps 30-31 in FIG. 4). The dedicated signaling earth station sends a CONNECT ACK message to the called party (steps 32-33 in Fig. 4).

(12) The dedicated signaling earth station sends update information to satellite 1 and satellite 2 respectively (steps 34 and 35 in FIG. 4 ). The dedicated signaling earth station sends a CONNECT message to the calling user (steps 36-37 in Figure 4). The calling party sends a CONNECT ACK message to the dedicated signaling earth station (steps 38-39 in Figure 4). So far, for signaling 1, the connection between the calling party and the called party is established.

After the connection is established, the data is transferred. After the data transmission is completed, the present invention performs ground processing on all signaling connection releases. Since both signaling 1 and signaling 2 are processed on the ground, only one signaling can be described. The following embodiment is the connection release initiated by the calling party. Refer to Figure 5 for the connection release initiated by the calling party.

(1) The caller sends RELEASE information (step 1-2 in Fig. 5), and the signaling is transmitted to the dedicated signaling earth station through satellite forwarding.

(2) The dedicated signaling earth station will send the RELEASE COMPLETE message (step 3-4 in Fig. 5) to the calling party, send the RELEASE message (step 5-6 in Fig. 5) to the called party simultaneously, and send the forwarding table to the satellite Update command (step 7 in Figure 5), deletes the connection.

(3) The called party receives the release message, will release the connection information of itself, and sends the RELEASE COMPLETE message (steps 8-9 in Fig. 5) by the satellite forwarding module. If the release message is sent by the called party, the process is the same.

It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should belong to the protection scope of the appended claims of the present invention.

Claims (10)

1. the system of signaling in the satellite communication network with exchange capacity on the star is characterized in that, comprises star top and above ground portion; Star top comprises transmits connection table resource table administration module, outlet signaling module on signaling processing module, the star on signaling packets identification letter sorting module, inlet signaling module, the star; Above ground portion comprises that signaling is connected table resource table administration module with control information interface, ground signaling processing module, ground forwarding table;

Signaling packets identification letter sorting module: be used for signaling is discerned, and sort, confirm the processing mode of signaling according to recognition result;

Inlet signaling module: for the signaling of carrying out handling on the star, partly send announcement information earthward, the processing mode and the relevant parameter of this signaling of notice ground through this module;

Signaling processing module on the star: be used for signaling is carried out handling on the star;

On the star/and the ground forwarding table, connect table and resource table module: the relevant information of storage signaling;

Outlet signaling module: after finishing dealing with on the star, partly send a notification message earthward through this module, notice above ground portion signaling process finishes, and the relevant parameter of this signaling of notice above ground portion;

Signaling and control information interface: obtain the interactive information between the star ground;

Ground signaling processing module: be used for signaling is carried out floor treatment.

2. system according to claim 1 is characterized in that, said signaling packets identification letter sorting module, and identified information comprises: News Category, message id and time delay sign.Said signaling packets identification letter sorting module is kept a letter sorting table, and this module reads the message id of signaling, searches the letter sorting table, confirms that this signaling cell is follow-up signaling cell or new signaling cell; Letter sorting table list item comprises message id, the processing mode of signaling; Said signaling packets identification letter sorting module has the function of timer.

3. system according to claim 1 is characterized in that, said inlet signaling module, and announcement information comprises the processing mode of input VPI/VCI, bandwidth bearing capacity, input slogan, source address, destination address, connection identifier and signaling.

4. system according to claim 1 is characterized in that, signaling processing module on the said star; Specifically be used for: the correctness of inspection signaling, inspection calling number and called number are searched the position that the user belongs to according to the user number code table; Give user resource allocation; Distribute VPI/VCI, send CALLPROCEEDING message to caller, to called transmission SETUP message; Signaling processing module has the function of timer on the said star.

5. system according to claim 1 is characterized in that, on the said star/the ground forwarding table, connect in table and the resource table module, transmit input and output VPI/VCI, input/output terminal slogan that canned data comprises signaling; The connection identifier, bandwidth bearing capacity, source address and the destination address information that connect table storage signaling; The resource that the resource table storage is being used is at present managed resource.

6. system according to claim 1 is characterized in that, said outlet signaling module, and notification message comprises: output VPI/VCI, bandwidth bearing capacity, output slogan, source address, destination address and connection identifier.

7. system according to claim 1 is characterized in that, said ground signaling processing module; This functions of modules comprises the correctness of checking signaling, and inspection calling number and called number are searched the position that the user belongs to according to the user number code table; Give user resource allocation; Distribute VPI/VCI, send CALLPROCEEDING message to caller, to called transmission SETUP message.

8. have the processing method of signaling in the satellite communication network of exchange capacity on the star, it is characterized in that signaling separation step, signaling process step and star upper ground surface synchronizing step; Said signaling separation step: when many signalings arrive satellite; Said signaling packets identification letter sorting module is checked News Category, message id and time delay sign in the signaling cell format; Consider the satellite load condition simultaneously; Signaling is shunted processing, and a part of signaling adopts on the star and handles, and another part carries out floor treatment; Said signaling process step: calling subscriber and called subscriber connect through signaling, carry out transfer of data, discharge through signaling afterwards to connect; Said star upper ground surface synchronizing step: keep that star ground is transmitted, connection table and resource table synchronous.

9. processing method according to claim 7 is characterized in that, said signaling separation step is specific as follows:

(1) said signaling packets identification letter sorting module is checked the News Category sign in the signaling cell format, if discharge the relevant information of connection request, and execution in step 6; Otherwise, execution in step 2;

(2) said signaling packets identification letter sorting module is checked the message id sign in the signaling cell format, if new message id, promptly new signaling, execution in step 3; Otherwise, execution in step 4;

(3) said signaling packets identification letter sorting module is checked the time delay sign in the signaling cell format, and is high if processing delay requires, execution in step 5; Otherwise, execution in step 6;

(4) said signaling packets identification letter sorting module searches letter sorting table if corresponding list item is arranged in the letter sorting table, carries out handling on the star, and letter sorting finishes; Otherwise, execution in step 6;

(5) the current load condition of processor on the inspection star if processor load is light on the star, increases this item in the letter sorting table, signaling is forwarded to signaling processing module carries out handling on the said star on the said star, sorts end; Otherwise, execution in step 6;

(6) signaling is forwarded to said above ground portion, carries out floor treatment, letter sorting finishes.

10. processing method according to claim 7 is characterized in that, on the said star, the ground synchronous step is specific as follows:

(1) said signaling packets identification letter sorting module is accomplished identification, confirms that this signaling carries out handling on the star; Control dedicated channel between the passing of satelline said inlet signaling module and the star ground is sent to ground with a notification message; Notification message comprises the processing mode of input VPI/VCI, bandwidth bearing capacity, input slogan, source address, destination address, connection identifier and signaling; When this notification message sent, satellite started a timer;

(2) after this message is received on ground; Said ground forwarding table, connection table, resource table are preserved the processing mode of input VPI/VCI, bandwidth bearing capacity, input port, source address, destination address, connection identifier and the signaling of signaling, send a response message to satellite network simultaneously;

(3) if satellite network is received response message before timer expiry, then stop timer, otherwise retransmit this information.Timer is retransmitted number of times and is depended on the priority tag in the signaling cell format, and priority is high, the corresponding repeating transmission repeatedly; Otherwise once the back timer is still overtime in repeating transmission, then discharges and should connect;

(4) the said signaling packets identification of passing of satelline letter sorting module is checked the News Category in the signaling cell format, if receive the CONNECT ACK message that the user sends, then judges to handle on the star and accomplishes; The said outlet signaling of passing of satelline module sends a notification message with the control dedicated channel earthward; Notification message comprises output vpi/vci value, bandwidth bearing capacity, output slogan, source address, destination address, the connection identifier of the signaling of handling;

(5) after this message is received on ground, preserve output VPI/VCI, bandwidth bearing capacity, output slogan, source address, destination address, connection identifier at said ground forwarding table, connection table, resource table, simultaneously to response message of satellite transmission.Because connecting foundation back last minute resource of star can be occupied, so this response message should comprise the supplemental resources that ground provides;

(6) if satellite network is received response message before timer expiry, then stop timer; Otherwise retransmit this information; If retransmit still failure, then reclaim respective resources by force.

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