CN101127703B

CN101127703B - Start carried routing switching system for broadband satellite communication

Info

Publication number: CN101127703B
Application number: CN2007101199652A
Authority: CN
Inventors: 张涛; 张军; 肖鹏
Original assignee: Beihang University
Current assignee: Beihang University
Priority date: 2007-08-06
Filing date: 2007-08-06
Publication date: 2010-06-30
Anticipated expiration: 2027-08-06
Also published as: CN101127703A

Abstract

The utility model relates to a space-borne routing exchange system used for broad band satellite communication, comprising a plurality of user interface units which are respectively connected with a plurality of user physical layer processing units and a main-control routing exchange unit, and used for multi-user connection, rapid frame exchange and data processing; an inter-satellite link interface unit which is respectively connected with a multi inter-satellite link physical layer processing unit and a main control routing exchange unit and is used for performing inter-satellite wireless link processing of data transmitted by a plurality of inter-satellite link physical processing unit; a feeder link interface unit which is respectively connected with a feeder link physical layer processing unit and the main control routing exchange unit and used for performing the feeder wireless link processing; a main control routing exchange unit which is respectively connected with a pluralityof user interface units, an inter-satellite link interface unit and a feeder link interface and used for receiving various data and control information inputted into all the above units, thereby performing pocket forwarding and maintaining network status information and finishing interactive network protocol. The utility model has advantaged that the system can ensure the Qos of network operationeffectively and control network traffics.

Description

The spaceborne route switching system that is used for wideband satellite communication

Technical field

The present invention relates to a kind of spaceborne route switching communication system, especially a kind of spaceborne route switching system that is applied to the broadband connections satellite belongs to the space communication technical field.

Background technology

Space information network be a kind of based on satellite network (space-based), merge vacant lot information, by polytype satellite system on the different tracks, according to the maximum effectively comprehensive utilization principle of space information resource, a kind of intelligent system of interconnection, organic formation.This network synthesis multiple aerospace information system, have that autonomous information is obtained, stored, processing and distribution capability, can be interconnected with the information system of land, sea, air base, the polynary, three-dimensional of realization information shared, and becomes the important component part of next generation mobile communication (4G) and national information highway.

Spaceborne route switching technology is one of key technology of space information network, is the basic fundamental that realizes the space information network multimedia communication.The major function of spaceborne route switching comprises: satellite node is to the wireless access of ground based mobile subscriber, high speed exchange of information etc. is the product that modern space technology combines with mobile communication technology and network route switching technology on autonomous route between satellite node and the satellite node.

Existing spaceborne route switching system mainly contains two kinds: (Asynchronous Transfer Mode Switching is hereinafter to be referred as ATM) switching system towards the spaceborne circuit switching system of narrowband speech business with towards the spaceborne asynchronous transfer mode exchange of broad band Integrated service.Wherein the spaceborne circuit switching system towards the narrowband speech business adopts circuit exchange mode, it mainly is at traditional speech business, for example: Globalstar (Globalstar) system of the iridium of motorola inc (Indium) system, Ursula space communication company, shortcoming such as its service bandwidth with support is little, be difficult to support simultaneously multiple business such as data, network resource utilization is low.Especially these problems show more outstandingly after 2000, cause the appearance of multiple broadband satellite system schema.Spaceborne atm exchange system is mainly adopted in existing broadband satellite system design, for example: the Teledesic broadband mobile satellite communication system of Microsoft/McCaw, this system have the multiple business of can be provide service quality (hereinafter to be referred as: QoS) guarantee, support on the star advantages such as quick exchange.

But all there is following defective in above-mentioned spaceborne route switching system: can't with at present widely used based on Internet protocol (hereinafter to be referred as: the Internet IP) (Internet) is effectively compatible; To data, burst service especially, network efficiency is lower; Difficulty is supported in multicast; The signaling system of ATM complexity is difficult to adapt to the satellite network of topological frequent variations, and signaling consumption is huge; The header expense is excessive, and bandwidth availability ratio is low etc.

Spaceborne IP switching system can provide the seamless link with ground Internet, it realizes simple, it can solve above-mentioned spaceborne route switching system and all have defective, have a good application prospect, but can't guarantee the QoS and the Control Network flow of Network, in ground network, can address the above problem by spaceborne IP/MPLS switching system, effectively guarantee the QoS and the Control Network flow of Network.But, owing to handle resource-constrained and network topology dynamic dispatching characteristics on the multi-beam that mobile-satellite has design, mobile wireless access, the star, make existing IP/MPLS switching technology can't effectively be applied to satellite network, thereby can't overcome the QoS that can't guarantee Network of existing spaceborne IP switching system existence and the defective of Control Network flow.

Summary of the invention

Technology of the present invention is dealt with problems and is: overcome the deficiencies in the prior art, a kind of spaceborne route switching system that is used for wideband satellite communication is provided, this system can guarantee the QoS of Network effectively, and Control Network flow well.

Technical solution of the present invention: be used for the spaceborne route switching system of wideband satellite communication, it is characterized in that comprising:

A plurality of user interface sections link to each other with a plurality of user's physical layer processing unit, and all user interface sections link to each other with a master control Routing Switch Unit, are used for a plurality of users' accesses, fast frame exchange and data processing;

An inter-satellite link interface unit links to each other with a plurality of inter-satellite link physical layer processing unit, links to each other with a master control Routing Switch Unit, is used for the data that a plurality of inter-satellite link physical layer processing unit send are carried out Radio Link processing between star;

A feeder link interface unit links to each other with the master control Routing Switch Unit with the feeder link physical layer processing unit respectively, carries out the feeder line Radio Link and handles;

A master control Routing Switch Unit, be connected with a plurality of user interface sections, inter-satellite link interface unit and feeder link interface unit respectively, be used to receive the data and the various control information of above-mentioned each interface unit input, carry out packet and transmit and the maintaining network state information, it is mutual to finish procotol.

Described a plurality of user interface section, the corresponding a plurality of user's physical layer processing unit of reception are handled the medium access control MAC frame of being made up of signaling mac frame and professional mac frame that obtains and are flowed, in each mac frame head connection identifiers CID is arranged all, identify the qos parameter of this mac frame and belong to which user's connection; For the signaling mac frame that receives, judge by the CID sign, if the signaling of handling on the MAC layer star, comprise and insert demand signalling, radio resource request signaling, synchronous signaling, then handle, and reply signaling accordingly to the loopback of user's physical layer processing unit at this user interface section; If not the signaling mac frame of handling at this user interface section, the MAC layer signaling that promptly needs the ground juncture station to handle comprises subscription authentication, encryption key distribution signaling, then these signalings formed the signaling data bag, delivers to the master control Routing Switch Unit; For the professional mac frame that receives, if at the professional mac frame of this user interface section inner exchanging (when two users communicate, there are two types, a kind of is that two users are in the same wave beam, because in native system, use a user interface section to handle the interior business of a wave beam, the professional mac frame of this moment just can exchange in same user interface section), then replace the frame head of this professional mac frame, and the professional mac frame after will handling sends back to user's physical layer processing unit; If not professional mac frame (another kind of situation in this user interface section inner exchanging, two users are in different wave beams or different satellite communication down, the professional mac frame of this moment just can not be in the user interface section inner exchanging, and the mac frame of this type is not the mac frame in the user interface section inner exchanging.When reality is implemented, can use different CID leaders to know this two kinds of different mac frames), then should form business data packet by the business mac frame, deliver to the master control Routing Switch Unit.

Described inter-satellite link interface unit, receiving a plurality of inter-satellite link physical layer processing unit handles the mac frame of being made up of signaling mac frame and professional mac frame that obtains and flows, for the signaling mac frame that receives, if carry out the processing signaling mac frame at this inter-satellite link interface unit, then handle at this inter-satellite link interface unit, and reply the signaling mac frame accordingly to the loopback of inter-satellite link physical layer processing unit, if not the mac frame of handling at this inter-satellite link interface unit, then this signaling mac frame is formed the signaling data bag, deliver to the master control Routing Switch Unit; For the professional mac frame that receives, should form business data packet by the business mac frame, deliver to the master control Routing Switch Unit.

Described feeder link interface unit, reception feeder link physical layer processing unit is handled the mac frame of being made up of signaling mac frame and professional mac frame that obtains and is flowed, for the signaling mac frame that receives, if the mac frame of handling at this feeder link interface unit, then in this feeder link interface unit, handle, and reply the signaling mac frame accordingly to the loopback of feeder link physical layer processing unit; If not the mac frame of in this feeder link interface unit, handling, then this signaling mac frame is formed the signaling data bag, deliver to the master control Routing Switch Unit; For the professional mac frame that receives, professional mac frame is formed business data packet, deliver to the master control Routing Switch Unit.

Described master control Routing Switch Unit, for the signaling data bag that receives from user interface section, inter-satellite link interface unit and feeder link interface unit, if directly carry out the processing signaling packet at this master control Routing Switch Unit, then directly handle within it, and send corresponding signaling data bag to described three interface units; If not directly carrying out the processing signaling packet, then directly it is delivered to the feeder link interface unit at this master control Routing Switch Unit; For from described three business data packet that interface unit receives, if the quick business data packet of transmitting, then directly this business data packet is delivered to above-mentioned three corresponding interface unit, business data packet if not quick forwarding, then in described master control route switching system, carry out route and calculate, and select to deliver to above-mentioned three corresponding interface unit according to result of calculation.

The present invention's advantage compared with prior art is:

(1) existing satellite communication substantially all is a transparent forwarding, the data that the user sends on the satellite all are directly to be forwarded to ground station, finish the function of route switching then by ground station, the great propagation delay time that so just causes, and among the present invention, the function that has just had route switching on the satellite can greatly reduce the time delay of transmission like this, has guaranteed user's QoS demand.

(2) user interface section adopts the frame exchange to the business in the wave beam, handles and needn't all deliver to master control as the switch of ground, can reduce the load of master control route so greatly, has much controlled network traffics well, has improved the overall performance of system.

(3) in user interface section, employing is towards the design that connects based on CID, compare the method for the logic channel mapping of original use, realize simpler, and can realize user's link layer QoS assurance more easily, and adopt this design can more effectively realize the management of Radio Resource on the star.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the structural representation of user interface section of the present invention;

Fig. 3 is the structural representation of inter-satellite link interface unit of the present invention;

Fig. 4 is an inter-satellite link protocol state machine schematic diagram of the present invention;

Fig. 5 is the structural representation of feeder link interface unit of the present invention;

Fig. 6 is the structural representation of master control route switching of the present invention system.

Embodiment

Shown in 1 figure, the present invention includes a plurality of user interface section 1, inter-satellite link interface unit 2, a feeder link interface unit 3 and a master control Routing Switch Unit 4, wherein:

1, user interface section

User interface section 1 links to each other with master control Routing Switch Unit 4 with user's physical layer processing unit 5, is used for a plurality of users' accesses, fast frame exchange and data processing, finishes the function that user radio inserts.

User interface section 1 reception user physical layer processing unit 5 is handled the mac frame of being made up of signaling mac frame and professional mac frame that obtains and is flowed, in user interface section 1, in each mac frame head of input connection identifiers CID (Connection Identifier) is arranged all, identify the qos parameter of this mac frame and belong to which user's connection.

The CID sign is made up of 16bit, can represent 0～65535 integer, in the time of in-system define, the CID that can oneself define different range is used for different business, the signaling handled on the star of 0～99 expression for example, the business datum of 100～40000 expression interface unit inner exchanging, 40001～65535 expressions need the data of group bag etc.

The signaling mac frame of receiving from user's physical layer processing unit 5, if the signaling mac frame of in user interface section 1, handling, promptly identify the signaling mac frame that judges whether to handling on the star by CID, the signaling of handling on the star comprises resource allocation signal etc. on access control signaling, the star, then in this user interface, handle, and reply the signaling mac frame accordingly to 5 loopbacks of user's physical layer processing unit; The signaling mac frame of handling on the star, but the MAC layer signaling that needs the ground juncture station to handle comprises subscription authentication, encryption key distribution signaling, then these signalings formed packet, is sent to master control Routing Switch Unit 4; The professional mac frame of receiving from user's physical layer processing unit 1, judge if can be by the CID sign at the professional mac frame of user interface section 1 inner exchanging, then replace the frame head of this professional mac frame, and the professional mac frame after will handling sends back to user's physical layer processing unit 5; By CID sign judge if not, then professional mac frame is formed business data packet, be sent to master control Routing Switch Unit 4.

For above-mentioned in this user interface section inner exchanging professional mac frame and be not being judged as at the professional mac frame of this user interface section inner exchanging: when two users communicate, there are two types, a kind of is that two users are in the same wave beam, because the present invention uses a user interface section to handle the interior business of a wave beam, the professional mac frame of this moment just can exchange in same user interface section, another kind of situation, two users are in different wave beams or different satellite communication down, the professional mac frame of this moment just can not be in the user interface section inner exchanging, and the mac frame of this type is not the mac frame in the user interface section inner exchanging.When reality is implemented, can use different CID leaders to know this two kinds of different mac frames.

As shown in Figure 1, 2, the concrete composition of user interface section 1 and being achieved as follows:

(1) the mac frame input/output interface 101: this interface receives continuous mac frame from user's physical layer processing unit 5 and is transferred to mac frame sort module 102, and the mac frame of mac frame down queue module 107 is transferred to user's physical layer processing unit 5.

(2) the mac frame sort module 102: the mac frame that this module is sent here mac frame input/output interface 101 is judged, if up signaling mac frame then is sent to signaling processing module 103; If professional mac frame then is sent to mac frame upstream queue module 104; This module receives the downlink signaling that signaling processing module 103 is sent here simultaneously, and it is sent to mac frame input/output interface 101.Judgement is up signaling mac frame, or professional mac frame, can be by the field of mac frame head, and for example the mac frame head has the type field, if the type field is 0, then shows it is signaling, is that 1 expression is professional.

(3) signaling processing module 103: signaling processing module need carry out the work of following five aspects:

1. receive the signaling mac frame that mac frame sort module 102 is sent here, resolve the content of signaling mac frame, access signaling is wherein delivered to access control module 117, and the signaling that obtains to reply is delivered to mac frame sort module 102, the resource management signaling is delivered to RRM module 116, and the signaling that will obtain to reply is delivered to mac frame sort module 102.Mac frame all is the form of bit stream in transmission, directly intercepts the mac frame head and just can resolve mac frame.

2. receive the resource management signaling mac frame that RRM module 116 is sent here, directly deliver to mac frame sort module 103.Judge that resource management signaling mac frame can be by the field in the mac frame head, such as the Signal the type field, if 1 expression is the resource management signaling.

3. receive the control information of the master control Routing Switch Unit 4 that control input/output interface 118 sends here, control information in fact promptly is the information of updating form, upgrades IP/MPLS-CID mapping table (comprising IP-CID mapping table and MPLS-CID mapping table) and transmits (comprise MPLS transmits with IP transmit) fast.

The structure of IP-CID mapping table

Source IP address	Purpose IP address	Downlink business CID	The down queue scheduling is excellent
						Number	Elder generation's level

The structure of MPLS-CID mapping table

Inlet MPLS label	Downlink business CID number	The down queue dispatching priority
Inlet MPLS label	Downlink business CID number	The down queue dispatching priority

The structure that MPLS transmits

Inlet MPLS label	The output slogan	Output inter-satellite link number
Inlet MPLS label	The output slogan	Output inter-satellite link number	Label 1	Interface unit 2	Do not have
Label 2	Do not have	Inter-satellite link 2	Label 1	Interface unit 2	Do not have

The structure that IP transmits

Source IP address	Purpose IP address	Next-hop ip address	The output slogan	Output inter-satellite link number	Cost
Source IP address	Purpose IP address	Next-hop ip address	The output slogan	Output inter-satellite link number	Cost

4. according to receiving the user signaling mac frame, upgrade the CID-CID mapping table from 103 of moulds of mac frame classification.

The structure of CID-CID mapping table

Up CID number	Descending CID number	The down queue dispatching priority
Up CID number	Descending CID number	The down queue dispatching priority

5. after the control information of packet table look-up module 111 being sent here is handled, deliver to control input/output interface 118 and send to master control Routing Switch Unit 4.Control information is actually instruction, and in fact the instruction of promptly indicating the master control Routing Switch Unit by which port to transmit, the processing of carrying out here are exactly that these instruction framing are sent to master control Routing Switch Unit 4 then.

(4) mac frame upstream queue module 104: this module receives the mac frame of mac frame sort module 103, be deposited in the formation, different according to mac frame then priority is as long as there is high priority, just send into the frame of high priority earlier, select mac frame to be sent to mac frame Switching Module 105.

(5) the mac frame Switching Module 105: this module receives the mac frame that mac frame upstream queue module 104 is sent here, resolve the mac frame head, according to the inquiry of the CID field in mac frame head CID-CID mapping table, judge whether this mac frame can exchange in this user interface section, as passing through to judge the CID field, it as the CID field 1000～10000 the business that can in interface unit, exchange exactly, if can in this user interface section, exchange, be sent to mac frame down queue module 107 after then this mac frame frame head being replaced; If cannot in this user interface section, exchange, then do not process and directly be sent to data packet group bag module 108.

(6) the CID-CID mapping table module 106: the record whether mac frame that this module is preserved the descending CID of up mac frame CID correspondence and CID correspondence can exchange at this interface, record in this module is added, deletes and revised by signaling processing module 103, is inquired about by mac frame Switching Module 105.

(7) mac frame down queue module 107: the mac frame that this module reception mac frame Switching Module 105 and packet splitting and reorganizing module 115 are sent here, be deposited in the formation, select mac frame to be sent to mac frame input/output interface 101 according to the different priority of mac frame then.

(8) data packet group bag module 108: this module receives the mac frame that mac frame Switching Module 105 is sent here, at first carry out buffer memory, if speech business mac frame, can judge by the CID field, as 10001～10100 expressions are speech businesses, then inquire about IP/MPLS-CID mapping table module 109, obtain pairing IP address information of CID or MPLS label information in the mac frame head, these mac frames are formed IP or MPLS packet the most at last, and be sent to packet upstream queue module 110, if not the speech business mac frame, then directly each mac frame is formed packet and is sent to packet upstream queue module 110.

(9) the IP/MPLS-CID mapping table module 109: this module is preserved the up IP address or the MPLS label of up mac frame CID correspondence, and the record of the descending CID of downlink data packet IP or MPLS correspondence.Record in this module is added, deletes and revised by signaling processing module, is inquired about by data packet group bag module 108 and packet splitting and reorganizing module 115.

(10) packet upstream queue module 110: this module receives the packet that data packet group bag module 108 is sent here, is deposited in the formation, and different according to packet then priority selects packet to be sent to packet table look-up module 111.The different priority of judgment data bag can be distinguished priority by CID, is 5000～10000 for priority 0 as CID, and CID 10001～20000 is priority 1, by that analogy.

(11) the packet table look-up module 111: this module receives the packet that packet upstream queue module is sent here, inquiry is transmitted fast, to the forwarding control information of signaling processing module 103 input corresponding data bags, and packet is sent to packet input/output interface module 113.

(12) transmit module 112 fast: this module is preserved the forwarding port numbers of IP address and MPLS label correspondence, with the forwarding port of determination data bag.Record in this module is added, deletes and revised by signaling processing module 103, is inquired about by packet table look-up module 111.

(13) the packet input/output interface module 113: the data packet transmission that this module is sent packet table look-up module 111 here arrives master control Routing Switch Unit 4, and the packet that master control Routing Switch Unit 4 is sent here is sent to packet down queue module 114.

(14) packet down queue module 114: this module receives the packet that packet input/output interface module 113 is sent here, is deposited in the formation, selects packet to be sent to packet splitting and reorganizing module 115 according to the different priority of packet then.

(15) packet splitting and reorganizing module 115: this module receives the packet that packet down queue module 114 is sent here, at first packet is split into mac frame, inquire about IP/MPLS-CID mapping table module 109 then, obtain the mac frame cid information, for each mac frame adds the mac frame head, at last mac frame is sent to mac frame down queue module 107.

(16) the RRM module 116: this module is obtained current allocation of radio resources situation by signaling processing module 103, and by calculating the signaling that produces allocation of radio resources, is sent to signaling processing module 103.Calculating the signaling that produces allocation of radio resources can realize by general allocation of radio resources algorithm.

(17) access control module 117: this module receives user's access signaling that signaling processing module 103 is sent here, obtain the current wireless resource allocation conditions by signaling processing module 103, judge whether then to allow the user to insert, and the corresponding signaling of replying of generation is sent to signaling processing module 103.Judge whether to allow the user insert can be general the access control algorithm realize.

(18) control input/output interface 118: the control information that this module is sent signaling processing module 103 here is transferred to master control Routing Switch Unit 4, and the control information that master control Routing Switch Unit 4 is sent here is transferred to signaling processing module 103.

2, the inter-satellite link interface unit 2

Inter-satellite link interface unit 2 links to each other with a master control Routing Switch Unit 4 with a plurality of inter-satellite link physical layer processing unit 6 respectively, is used for the data that a plurality of inter-satellite link physical layer processing unit 6 send are carried out Radio Link processing between star.

The a plurality of inter-satellite link physical layer processing unit 6 of inter-satellite link interface unit 2 receptions are handled the mac frame of being made up of signaling mac frame and professional mac frame that obtains and are flowed, for the signaling mac frame that receives, in inter-satellite link interface unit 2, handle (the process of processing, can be specifically with reference to High-Level Data Link Control HDLC standard), and reply the signaling mac frame accordingly to 7 loopbacks of feeder link physical layer processing unit; For the professional mac frame that receives, professional mac frame is formed packet, be sent to master control Routing Switch Unit 4.

Shown in Fig. 1,3, the composition of inter-satellite link interface unit 2 of the present invention and specific implementation process are as follows:

(1) the mac frame input/output interface 201: this interface receives continuous mac frame from a plurality of inter-satellite link physical layer processing unit 6 and is transferred to mac frame sort module 202, and the mac frame of mac frame down queue module 112 is transferred to a plurality of inter-satellite link physical layer processing unit 6.

(2) the mac frame sort module 202: the mac frame that this module reception mac frame input/output interface 201 is sent here is judged, if up signaling mac frame then is sent to inter-satellite link protocol state machine module 203; If professional mac frame then is sent to mac frame upstream queue module 204; Mac frame sort module 202 receives the downlink signaling that inter-satellite link protocol state machine module 203 is sent here simultaneously, and it is sent to mac frame input/output interface 201.Can judge whether by the field of mac frame head to be traffic frame, the type field be arranged such as the mac frame head, if the type field be 0 then show it is signaling, be that 1 expression is professional.

(3) inter-satellite link protocol state machine module 203: inter-satellite link protocol state machine module need be carried out the work of three aspects.Provided the flow chart of inter-satellite link protocol state machine module 203 as Fig. 4.

Shown in 4 figure, have three states, be in " losing synchronously " state during beginning, at this time this module forwards " presynchronization " state to, and under this state, this module obtains synchronously by the unique word that detects on the link, enter " synchronous data transmission " state then, under " synchronous data transmission " state, this module is the transmission of enable data immediately, and constantly monitors unique word and come the synchronous of maintenance system.

1. safeguard according to the inter-satellite link agreement and under above-mentioned three kinds of different states, carry out three kinds of different processing by a finite state machine, promptly " lose synchronously ", " presynchronization " and " synchronous data transmission "; Receive the signaling mac frame that mac frame sort module 202 is sent here, resolve the content of signaling mac frame, handle and will reply signaling and deliver to mac frame sort module 202.

2. receive the control information of the master control Routing Switch Unit 4 that control input/output interface 213 sends here, carry out corresponding operating, upgrade and transmit 208 and mac frame head-downlink port mapping table 214 fast.

3. deliver to control input/output interface 213 after the control information that 207 of the moulds of packet being tabled look-up are sent here is handled and send to master control Routing Switch Unit 4.

(4) mac frame upstream queue module 204: this module receives the mac frame of mac frame sort module 202, is deposited in the formation, selects mac frame to be sent to data packet group bag module 205 according to the different priority of mac frame then.

(5) data packet group bag module 205: this module receives the mac frame that mac frame upstream queue module 204 is sent here, a plurality of mac frames is formed packet, and be sent to packet upstream queue module 206.

(6) packet upstream queue module 206: this module receives the packet that data packet group bag module 205 is sent here, is deposited in the formation, selects packet to be sent to packet table look-up module 207 according to the different priority of packet then.

(7) the packet table look-up module 207: this module receives the packet that packet upstream queue module 206 is sent here, inquiry transmits 208 fast, to the forwarding control information of inter-satellite link protocol state machine module 203 input corresponding data bags, and packet is sent to packet input/output interface module 209.

(8) transmit module 208 fast: this module is preserved the forwarding port numbers of IP address and MPLS label correspondence, with the forwarding port of determination data bag.Record in this module is added, deletes and revised by inter-satellite link protocol state machine module 203, is inquired about by packet table look-up module 207.

(9) the packet input/output interface module 209: the data packet transmission that this module is sent packet table look-up module 207 here arrives master control Routing Switch Unit 4, and the packet that master control Routing Switch Unit 4 is sent here is sent to packet down queue module 210.

(10) packet down queue module 210: this module receives the packet that packet input/output interface module 209 is sent here, is deposited in the formation, selects packet to be sent to packet splitting and reorganizing module 211 according to the different priority of packet then.

(11) packet splitting and reorganizing module 211: this module receives the packet that packet down queue module 210 is sent here, at first packet is split into mac frame, after adding inter-satellite link mac frame head then, at last mac frame is sent to mac frame down queue module 212.

(12) mac frame down queue module 212: this module receives the mac frame that packet splitting and reorganizing module 211 is sent here, is deposited in the formation, selects mac frame to be sent to mac frame input/output interface 201 according to the different priority of mac frame then.

(13) control input/output interface 213: the control information that this module is sent inter-satellite link protocol state machine module 203 here is transferred to master control Routing Switch Unit 4, and the control information that master control Routing Switch Unit 4 is sent here is transferred to inter-satellite link protocol state machine module 203.

(14) mac frame head-downlink port mapping table module 214: this module is preserved the descending mac frame output slogan of mac frame head correspondence, will be forwarded to which inter-satellite link physical layer processing unit 6 with the decision mac frame.Record in this module is added, deletes and revised by inter-satellite link protocol state machine module 203, is inquired about by mac frame input/output interface 201.

3, the feeder link interface unit 3

Feeder link interface unit 3 links to each other with master control Routing Switch Unit 4 with feeder link physical layer processing unit 7 respectively, carries out the feeder line Radio Link and handles, and finishes the function of point-to-point feeder link agreement.The feeder link agreement is in fact the same with the inter-satellite link agreement, and different is, inter-satellite link has a plurality of, and inter-satellite link interface unit state machine need be safeguarded the state of a plurality of links simultaneously, and feeder link has only one, and the information that only needs to safeguard a link gets final product.

Feeder link interface unit 3 reception feeder link physical layer processing unit 7 are handled the mac frame of being made up of signaling mac frame and professional mac frame that obtains and are flowed, for the signaling mac frame that receives, in feeder link interface unit 3, handle, and reply the signaling mac frame accordingly to 7 loopbacks of feeder link physical layer processing unit; For the professional mac frame that receives, professional mac frame is formed packet, be sent to master control Routing Switch Unit 4.

Shown in Fig. 1,5, the composition of feeder link interface unit 3 of the present invention and specific implementation process are as follows:

(1) the mac frame input/output interface 301: this interface receives continuous mac frame from feeder link physical layer processing unit 7 and is transferred to mac frame sort module 302, and the mac frame of mac frame down queue module 312 is transferred to feeder link physical layer processing unit 7.

(2) the mac frame sort module 302: the mac frame that this module reception mac frame input/output interface 301 is sent here is judged, if the signaling mac frame then is sent to feeder link protocol state machine module 303; If professional mac frame then is sent to mac frame upstream queue module 304, this module receives the downlink signaling that feeder link protocol state machine module 303 is sent here simultaneously, and it is sent to mac frame input/output interface 301.

(3) feeder link protocol state machine module 303: feeder link protocol state machine module 303 need be carried out the work of three aspects.

1. safeguard a finite state machine according to the feeder link agreement, under three different states, carry out three kinds of different processing, promptly " lose synchronously ", " presynchronization " and " synchronous data transmission " (see before and state and Fig. 4).Receive the signaling mac frame that mac frame sort module 302 is sent here, resolve the content of signaling mac frame, handle and will reply signaling according to current state and deliver to mac frame sort module 202.

2. receive the control information of the master control Routing Switch Unit 4 that the control input/output interface sends here, upgrade operation, upgrade and transmit 308 fast.

3. deliver to control input/output interface 313 after the control information of packet table look-up module 302 being sent here is handled and send to master control Routing Switch Unit 4.

(4) mac frame upstream queue module 304: this module receives the mac frame of mac frame sort module 302, is deposited in the formation, selects mac frame to be sent to data packet group bag module 305 according to the different priority of mac frame then

(5) data packet group bag module 305: this module receives the mac frame that mac frame upstream queue module 304 is sent here, a plurality of mac frames is formed packet, and be sent to packet upstream queue module 306.

(6) packet upstream queue module 306: this module receives the packet that data packet group bag module 305 is sent here, is deposited in the formation, selects packet to be sent to packet table look-up module 307 according to the different priority of packet then.

(7) the packet table look-up module 307: this module receives the packet that packet upstream queue module 306 is sent here, module 308 is transmitted in inquiry fast, to the forwarding control information of feeder link protocol state machine module 303 input corresponding data bags, and packet is sent to packet input/output interface module 309.

(8) transmit module 308 fast: this module is preserved the forwarding port numbers of IP address and MPLS label correspondence, with the forwarding port of determination data bag.Record in this module is added, deletes and revised by feeder link protocol state machine module, is inquired about by packet table look-up module 307.

(9) the packet input/output interface module 309: the data packet transmission that this module is sent packet table look-up module 307 here arrives master control Routing Switch Unit 4, and the packet that master control Routing Switch Unit 4 is sent here is sent to packet down queue module 310.

(10) packet down queue module 310: this module receives the packet that packet input/output interface module 309 is sent here, is deposited in the formation, selects packet to be sent to packet splitting and reorganizing module 311 according to the different priority of packet then.

(11) packet splitting and reorganizing module 311: this module receives the packet that packet down queue module 310 is sent here, at first packet is split into mac frame, after adding feeder link mac frame head then, at last mac frame is sent to mac frame down queue module 312.

(12) mac frame down queue module 312: the mac frame that this module reception mac frame sort module 302 and packet splitting and reorganizing module 311 are sent here, be deposited in the formation, select mac frame to be sent to mac frame input/output interface 301 according to the different priority of mac frame then.

(13) control input/output interface 314: the control information that this module is sent feeder link protocol state machine module 302 here is transferred to master control Routing Switch Unit 3, and the control information that master control Routing Switch Unit 4 is sent here is transferred to feeder link protocol state machine module 303.

4, the master control Routing Switch Unit 4

Master control Routing Switch Unit 4 is connected with a plurality of user interface sections, inter-satellite link interface unit and feeder link interface unit respectively, be used to receive the data and the various control information of above-mentioned each interface unit input, carry out packet and transmit and the maintaining network state information, it is mutual to finish procotol.

Receive the signaling data bag from each interface unit, then directly handle, if receive business data packet, if the quick packet of transmitting from each interface unit in this unit, then under the control of central control unit, packet is sent to the corresponding interface unit.If need the packet of route, then carry out route and calculate in this unit, select to deliver to the corresponding interface unit according to the forwarding port numbers that calculates.

Receive control information from each interface unit, directly handle, and reply corresponding control information to each interface unit in this unit.

Shown in Fig. 1,6, the composition and the implementation procedure of master control Routing Switch Unit 4 are as follows:

(1) forwarding module 401: this module links to each other with user interface section 1, inter-satellite link interface unit 2, feeder link interface unit 3, protocol processes interface module 402 and central control module 409, and this resume module has following 2 kinds of situations:

1. receive each interface unit, it is the data packet stream that user interface section 1, inter-satellite link interface unit 2, feeder link interface unit 3 are sent here, if the quick packet of transmitting, then directly be forwarded to the corresponding interface unit by central control module 409 controls, if not the packet of quick forwarding, then be sent to protocol processes interface module 402.The method of judging the packet of transmitting fast is: searching fast and transmit, is exactly the packet of transmitting fast if transmit respective items fast, if do not have, then is not.

2. receive business data packet and signaling data bag that protocol processes interface module 402 is sent here, be forwarded to the corresponding interface unit by central control module 409.

(2) the protocol processes interface module 402: the packet delivery that this module is sent forwarding module 401 here is handled to basic agreement module 403 and mpls protocol module 404, being about to the IP packet is sent to basic agreement module 403 and carries out route and calculate, the MPLS packet is sent to the mpls protocol module, and the data packet transmission that basic agreement module 403 and mpls protocol module 404 are sent here is to forwarding module 401.

(3) the basic agreement module 403: basic agreement module 403 comprises IP agreement, Http agreement, Ftp agreement and Telnet agreement etc.This module receives the IP packet that protocol processes interface module 403 is sent here, is divided into following two kinds of situations.

1. receive signaling IP packet (judging) by the type field in the IP data packet head, if webmaster signaling (judging) by the type field in the IP data packet head, then be sent to network management module 405 and obtain the corresponding signaling of replying and (reply the value that signaling comprises some network parameters, such as the buffer memory private situation, port speed etc.) be sent to protocol processes interface module 402, if route signaling (judging) by the type field in the IP data packet head, then be sent to routing management module 406 and obtain the corresponding signaling of replying and be sent to protocol processes interface module 402, if below neither be then handle, and will reply the signaling data bag accordingly and be sent to protocol processes interface module 402 in this basic agreement module 403.

2. receive professional IP packet, carry out route and calculate, calculate be the port numbers of transmitting after, upgrade routing table, promptly revise the item of routing table, and packet be sent to protocol processes interface module 402.

(4) the mpls protocol module 404: this module is safeguarded mpls protocol.This module receives the MPLS signaling data bag that protocol processes interface module 402 is sent here, if the tag path signaling is (by the MPLS tag head, such as tag head is that 100 expressions are tag path signalings), then send in the tag control module 407, if not the tag path signaling, then in mpls protocol module 404, directly handle, after promptly destroying, and will reply signaling MPLS packet accordingly and be sent to protocol processes interface module 402, concrete processing procedure can be with reference to the mpls protocol standard.

(5) network management module 406: this module receives the webmaster signaling IP packet that basic agreement module 403 is sent here, handles, and after promptly destroying, will reply signaling IP packet and be sent to basic agreement module 403.

(6) the routing table administration module 406: this module receives the route signaling IP packet that basic agreement module 403 is sent here, handle, promptly according to its information calculations route, after destroying this packet then, reply corresponding signaling IP packet, and the route table items in new database (routing table and the label list) module more.

(7) the tag control module 407: this module receives the tag path signaling MPLS packet that mpls protocol module 404 is sent here, handle, promptly according to its information calculations MPLS path, after destroying this packet then, reply corresponding signaling MPLS packet, and the label list item in new database (routing table and the label list) module more.

(8) database (routing table and label list) module 408: this module is preserved route table items and is comprised that IP and corresponding port and label list item include a mouthful label, outlet label and corresponding port.Record in this module is added, deletes and revised by routing table administration module 406 and tag control module 407, promptly in case find have new IP just to add, IP forwarding port changes and just makes amendment, after a certain item surpasses sometime, if never use, inquire about by central control module 409 just with its deletion.

(9) central control module 409: this module mainly comprises the work of following two aspects.

1. receive the control information that control input/output interface 410 is sent here, control forwarding module 401 is forwarded to different ports with packet, i.e. inter-satellite link interface or feeder link interface or user interface.

2. Query Database (routing table and label list) module 408 is obtained IP address, MPLS label and corresponding various parameters thereof, produces each interface unit control information corresponding, and is sent to each interface unit by control input/output interface 410.

(10) control input/output interface 410: this module is transferred to each interface unit with the control information that central control module 409 sends.

Claims

1. be used for the spaceborne route switching system of wideband satellite communication, it is characterized in that comprising: a plurality of user interface sections, inter-satellite link interface unit, feeder link interface unit and master control Routing Switch Unit, wherein:

Described a plurality of user interface section, the corresponding a plurality of user's physical layer processing unit of reception are handled the medium access control MAC frame of being made up of signaling mac frame and professional mac frame that obtains and are flowed, in each mac frame head connection identifiers CID is arranged all, identify the qos parameter of this mac frame and belong to which user's connection; For the signaling mac frame that receives, judge by the CID sign, if the signaling of handling on the MAC layer star, comprise and insert demand signalling, radio resource request signaling and synchronous signaling, then handle, and reply signaling accordingly to the loopback of user's physical layer processing unit at this user interface section; If not the signaling mac frame of handling at this user interface section, the MAC layer signaling that promptly needs the ground juncture station to handle comprises subscription authentication and encryption key distribution signaling, then these signalings formed the signaling data bag, delivers to the master control Routing Switch Unit; For the professional mac frame that receives,, then replace the frame head of this professional mac frame, and the professional mac frame after will handling sends back to user's physical layer processing unit if at the professional mac frame of this user interface section inner exchanging; If not professional mac frame in this user interface section inner exchanging, then should form business data packet by the business mac frame, deliver to the master control Routing Switch Unit;

Described inter-satellite link interface unit, receiving a plurality of inter-satellite link physical layer processing unit handles the mac frame of being made up of signaling mac frame and professional mac frame that obtains and flows, for the signaling mac frame that receives, then handle, and reply the signaling mac frame accordingly to the loopback of inter-satellite link physical layer processing unit at this inter-satellite link interface unit; For the professional mac frame that receives, should form business data packet by the business mac frame, deliver to the master control Routing Switch Unit;

Described feeder link interface unit, reception feeder link physical layer processing unit is handled the mac frame of being made up of signaling mac frame and professional mac frame that obtains and is flowed, for the signaling mac frame that receives, then in this feeder link interface unit, handle, and reply the signaling mac frame accordingly to the loopback of feeder link physical layer processing unit; For the professional mac frame that receives, professional mac frame is formed business data packet, deliver to the master control Routing Switch Unit;

Described master control Routing Switch Unit, for the signaling data bag that receives from user interface section, inter-satellite link interface unit and feeder link interface unit, then in its master control Routing Switch Unit, directly handle, and send corresponding signaling data bag to described three interface units; For from described three business data packet that interface unit receives, if the quick business data packet of transmitting, then directly this business data packet is delivered to above-mentioned three corresponding interface unit, business data packet if not quick forwarding, then in described master control route switching system, carry out route and calculate, and select to deliver to above-mentioned three corresponding interface unit according to the port numbers that calculates.

2. the spaceborne route switching system that is used for wideband satellite communication according to claim 1, it is characterized in that: the contents processing to the signaling handled on the described MAC layer star is: for inserting demand signalling, judge whether the current bandwidth resource satisfies the bandwidth demand that requires in the request of access, if satisfy then reply the admission confirm signaling, just do not reply the admission reject signaling if do not satisfy; For the radio resource request signaling, obtain the bandwidth of radio resource request, reply the allocation of radio resources signaling then; For synchronous signaling, reply and revise signaling synchronously.

3. the spaceborne route switching system that is used for wideband satellite communication according to claim 1, it is characterized in that: described user interface section comprises:

(1) mac frame input/output interface: this interface receives continuous mac frame from user's physical layer processing unit and is transferred to the mac frame sort module, and the mac frame of mac frame down queue module is transferred to user's physical layer processing unit;

(2) mac frame sort module: the mac frame that this module is sent here the mac frame input/output interface is judged, if up signaling mac frame then is sent to signaling processing module; If professional mac frame then is sent to mac frame upstream queue module; The mac frame sort module receives the downlink signaling mac frame that signaling processing module is sent here simultaneously, and it is sent to the mac frame input/output interface;

(3) signaling processing module: signaling processing module carries out the work of following five aspects:

1. receive the signaling mac frame that the mac frame sort module is sent here, resolve the content of signaling mac frame, access signaling is wherein delivered to the signaling of access control module and acquisition answer and delivered to the mac frame sort module, the resource management signaling is delivered to the RRM module;

2. receive the resource management signaling mac frame that the RRM module is sent here, directly deliver to the mac frame sort module;

3. receive the routing update information of the master control Routing Switch Unit that the control input/output interface sends here, upgrade the IP/MPLS-CID mapping table and transmit fast;

4. according to receiving the user signaling mac frame, upgrade the CID-CID mapping table from the mac frame sort module;

5. the packet forwarding information that the packet table look-up module is sent here is delivered to the control input/output interface and is sent to the master control Routing Switch Unit;

(4) mac frame upstream queue module: this module receives the mac frame of mac frame sort module, is deposited in the formation, selects mac frame to be sent to the mac frame Switching Module according to the different priority of mac frame then;

(5) mac frame Switching Module: this module receives the mac frame that the mac frame upstream queue is sent here, resolve the mac frame head, according to the inquiry of the CID field in mac frame head CID-CID mapping table, judge whether this mac frame can exchange in this interface, if could would be sent to mac frame down queue module after will this mac frame frame head replacing, if could would not do not process and directly be sent to data packet group bag module;

(6) CID-CID mapping table module: this module is preserved the record whether descending CID of the CID of up mac frame and this CID correspondence and this CID can exchange at this interface, record in this module is added, deletes and revised by signaling processing module, is inquired about by the mac frame Switching Module;

(7) mac frame down queue module: the mac frame that this module reception mac frame Switching Module and packet splitting and reorganizing module are sent here, be deposited in the formation, select mac frame to be sent to the mac frame input/output interface according to the different priority of mac frame then;

(8) data packet group bag module: this module receives the mac frame that the mac frame Switching Module is sent here, at first carry out buffer memory, if speech business mac frame, then inquire about the IP/MPLS-CID mapping table, obtain pairing IP address information of CID or MPLS label information in the mac frame head, these mac frames are formed IP or MPLS packet the most at last, and are sent to packet upstream queue module, if not, then directly a plurality of mac frames are formed packet and are sent to packet upstream queue module; (9) IP/MPLS-CID mapping table module: this module is preserved the up IP address or the MPLS label of up mac frame CID correspondence, and the record of the descending CID of downlink data packet IP or MPLS correspondence, record in this module is added, deletes and revised by signaling processing module, is inquired about by data packet group bag module and packet splitting and reorganizing module; (10) packet upstream queue module: this module receives the packet that data packet group bag module is sent here, is deposited in the formation, selects packet to be sent to the packet table look-up module according to the different priority of packet then; (11) packet table look-up module: this module receives the packet that packet upstream queue module is sent here, and inquiry is transmitted fast, to the forwarding control information of signaling processing module input corresponding data bag, and packet is sent to the packet input/output interface module; (12) transmit module fast: this module is preserved the forwarding port numbers of IP address correspondence or the forwarding port numbers of MPLS label correspondence, forwarding port with the determination data bag, record in this module is added, deletes and revised by signaling processing module, is inquired about by the packet table look-up module; (13) packet input/output interface module: the data packet transmission that this module is sent the packet table look-up module here arrives the master control Routing Switch Unit, and the packet that the master control Routing Switch Unit is sent here is sent to packet down queue module; (14) packet down queue module: this module receives the packet that the packet input/output interface module is sent here, is deposited in the formation, selects packet to be sent to packet splitting and reorganizing module according to the different priority of packet then; (15) packet splitting and reorganizing module: this module receives the packet that packet down queue module is sent here, at first packet is split into mac frame, inquire about the IP/MPLS-CID mapping table then, obtain the mac frame cid information, for each mac frame adds the mac frame head, at last mac frame is sent to mac frame down queue module; (16) RRM module: this module is obtained current allocation of radio resources situation by signaling processing module, and by calculating the signaling that produces allocation of radio resources, is sent to signaling processing module; (17) access control module: this module receives user's access signaling that signaling processing module is sent here, obtain the current wireless resource allocation conditions by signaling processing module, judge whether then to allow the user to insert, and the corresponding signaling of replying of generation is sent to signaling processing module; (18) control input/output interface: the control information that this module is sent signaling processing module here is transferred to the master control Routing Switch Unit, and the control information that the master control Routing Switch Unit is sent here is transferred to signaling processing module.

4. the spaceborne route switching system that is used for wideband satellite communication according to claim 1, it is characterized in that: described inter-satellite link interface unit comprises:

(1) mac frame input/output interface: this interface receives continuous mac frame from a plurality of inter-satellite link physical layer processing unit and is transferred to the mac frame sort module, and the mac frame of mac frame down queue module is transferred to a plurality of inter-satellite link physical layer processing unit;

(2) mac frame sort module: the mac frame that this module reception mac frame input/output interface is sent here is judged, if up signaling mac frame then is sent to inter-satellite link protocol state machine module; If professional mac frame then is sent to mac frame upstream queue module; The mac frame sort module receives the downlink signaling that inter-satellite link protocol state machine module is sent here simultaneously, and it is sent to the mac frame input/output interface;

(3) inter-satellite link protocol state machine module: inter-satellite link protocol state machine module is carried out the work of following three aspects:

1. safeguard a finite state machine according to the inter-satellite link agreement; Receive the signaling mac frame that the mac frame sort module is sent here, resolve the content of signaling mac frame, handle and will reply signaling and deliver to the mac frame sort module;

2. receive the control information of the master control Routing Switch Unit that the control input/output interface sends here, carry out corresponding operating, upgrade and transmit fast and mac frame head-downlink port mapping table;

3. deliver to the control input/output interface after the control information of the packet table look-up module being sent here is handled and send to the master control Routing Switch Unit;

(4) mac frame upstream queue module: this module receives the mac frame of mac frame sort module, is deposited in the formation, selects mac frame to be sent to data packet group bag module according to the different priority of mac frame then;

(5) data packet group bag module: this module receives the mac frame that mac frame upstream queue module is sent here, a plurality of MAC frames is formed packet, and be sent to packet upstream queue module;

(6) packet upstream queue module: this module receives the packet that data packet group bag module is sent here, is deposited in the formation, selects packet to be sent to the packet table look-up module according to the different priority of packet then;

(7) packet table look-up module: this module receives the packet that packet upstream queue module is sent here, inquiry is transmitted fast, to the forwarding control information of inter-satellite link protocol state machine module input corresponding data bag, and packet is sent to the packet input/output interface module;

(8) transmit module fast: this module is preserved the forwarding port numbers of IP address correspondence or the forwarding port numbers of MPLS label correspondence, forwarding port with the determination data bag, record in this module is added, deletes and revised by inter-satellite link protocol state machine module, is inquired about by the packet table look-up module;

(9) packet input/output interface module: the data packet transmission that this module is sent the packet table look-up module here arrives the master control Routing Switch Unit, and the packet that the master control Routing Switch Unit is sent here is sent to packet down queue module;

(10) packet down queue module: this module receives the packet that the packet input/output interface module is sent here, is deposited in the formation, selects packet to be sent to packet splitting and reorganizing module according to the different priority of packet then;

(11) packet splitting and reorganizing module: this module receives the packet that packet down queue module is sent here, at first packet is split into mac frame, add inter-satellite link mac frame head then after, at last mac frame is sent to mac frame down queue module;

(12) mac frame down queue module: this module receives the mac frame that packet splitting and reorganizing module is sent here, is deposited in the formation, selects mac frame to be sent to the mac frame input/output interface according to the different priority of mac frame then;

(13) control input/output interface: the control information that this module is sent inter-satellite link protocol state machine module here is transferred to the master control Routing Switch Unit, and the control information that the master control Routing Switch Unit is sent here is transferred to inter-satellite link protocol state machine module;

(14) mac frame head-downlink port mapping table module: this module is preserved the descending mac frame output slogan of mac frame head correspondence, to be forwarded to which inter-satellite link physical layer processing unit with the decision mac frame, record in this module is added, deletes and revised by inter-satellite link protocol state machine module, is inquired about by the mac frame input/output interface.

5. the spaceborne route switching system that is used for wideband satellite communication according to claim 1, it is characterized in that: described feeder link interface unit comprises:

(1) mac frame input/output interface: this interface receives continuous mac frame from the feeder link physical layer processing unit and is transferred to the mac frame sort module, and the mac frame of mac frame down queue module is transferred to the feeder link physical layer processing unit;

(2) mac frame sort module: the mac frame that this module reception mac frame input/output interface is sent here is judged, if the signaling mac frame then is sent to feeder link protocol state machine module; If professional mac frame then is sent to mac frame upstream queue module, the mac frame sort module receives the downlink signaling that feeder link protocol state machine module is sent here simultaneously, and it is sent to the mac frame input/output interface;

(3) feeder link protocol state machine module: feeder link protocol state machine module is carried out the work of following three aspects:

1. safeguard a finite state machine according to the feeder link agreement; Receive the signaling mac frame that the mac frame sort module is sent here, resolve the content of signaling mac frame, handle and will reply signaling and deliver to the mac frame sort module;

2. receive the control information of the master control Routing Switch Unit that the control input/output interface sends here, carry out corresponding operating, upgrade and transmit fast;

(7) packet table look-up module: this module receives the packet that packet upstream queue module is sent here, inquiry is transmitted fast, to the forwarding control information of feeder link protocol state machine module input corresponding data bag, and packet is sent to the packet input/output interface module;

(8) transmit module fast: this module is preserved the forwarding port numbers of IP address correspondence or the forwarding port numbers of MPLS label correspondence, forwarding port with the determination data bag, record in this module is added, deletes and revised by feeder link protocol state machine module, is inquired about by the packet table look-up module;

(11) packet splitting and reorganizing module: this module receives the packet that packet down queue module is sent here, at first packet is split into mac frame, add feeder link mac frame head then after, at last mac frame is sent to mac frame down queue module;

(13) control input/output interface: the control information that this module is sent feeder link protocol state machine module here is transferred to the master control Routing Switch Unit, and the control information that the master control Routing Switch Unit is sent here is transferred to feeder link protocol state machine module.

6. the spaceborne route switching system that is used for wideband satellite communication according to claim 1, it is characterized in that: described master control Routing Switch Unit comprises:

(1) forwarding module: this module links to each other with central control module with user interface section, inter-satellite link interface unit, feeder link interface unit, protocol processes interface module, and this resume module has following two kinds of situations:

1. receive the data packet stream that each interface unit is sent here, if the quick packet of transmitting then directly is forwarded to the corresponding interface unit by central control module control, if not then being sent to the protocol processes interface module;

2. receive business data packet and signaling data bag that the protocol processes interface module is sent here, the control by central control module is forwarded to the corresponding interface unit;

(2) protocol processes interface module: the packet delivery that this module is sent forwarding module here is handled to basic agreement module and mpls protocol module, and the data packet transmission that basic agreement module and mpls protocol module are sent here is to forwarding module;

(3) basic agreement module: the basic agreement module comprises IP agreement, Http agreement, Ftp agreement and Telnet agreement, and this module receives the IP packet that the protocol processes interface module is sent here, is divided into following two kinds of situations:

1. receive signaling IP packet, if webmaster signaling, then be sent to network management module and obtain the corresponding signaling of replying and be sent to the protocol processes interface module, if the route signaling then is sent to the corresponding signaling of replying of routing table administration module and acquisition and is sent to the protocol processes interface module;

2. receive professional IP packet, carry out upgrading routing table, and packet being sent to the protocol processes interface module after route calculates;

(4) mpls protocol module: this module is safeguarded mpls protocol, this module receives the MPLS signaling data bag that the protocol processes interface module is sent here, if MPLS tag path signaling, then send into the tag control module, if the MPLS managing signaling then directly handles and will reply signaling MPLS packet accordingly being sent to the protocol processes interface module in this module;

(5) network management module: this module receives the webmaster signaling IP packet that the basic agreement module is sent here, will reply signaling IP packet after handling and be sent to the basic agreement module;

(6) routing table administration module: this module receives the route signaling IP packet that basic agreement module is sent here, and handle the back and reply corresponding signaling IP packet, and more new database, i.e. route table items in routing table and the label list module;

(7) tag control module: this module receives the tag path signaling MPLS packet that mpls protocol module is sent here, and handle the back and reply corresponding signaling MPLS packet, and more new database, i.e. label list item in routing table and the label list module;

(8) database, be routing table and label list module, the route table items that this module is preserved comprises IP and corresponding port, the label list item of preserving comprises: inlet label, outlet label and corresponding port, record in this module is added, deletes and revised by routing table administration module and tag control module, is inquired about by central control module;

(9) central control module: this module comprises the work of following two aspects:

1. receive the control information that the control input/output interface is sent here, the control forwarding module is forwarded to different interface units with packet;

2. Query Database, be routing table and label list module, obtain IP address, MPLS label and with this IP address and the corresponding various parameters of MPLS label, produce each interface unit control information corresponding, and be sent to each interface unit by the control input/output interface;

(10) control input/output interface: this module is transferred to each interface unit with the control information that central control module sends.