CN101807952A - Star-on-part base band exchange-based satellite mobile communication method - Google Patents

Abstract

The invention discloses a star-on-part base band exchange-based satellite mobile communication method, which belongs to the technical field of satellite communication. The method of the invention comprises the following steps: a) establishing RRC connection between a calling party and an SRAN; b) performing authentication and identity authentication on a called party; c) establishing connection between an MSC of the calling party and the MSC of the called party; d) paging the called party; e) performing the authentication and the identity authentication on the called party; f) applying single-hop communication connection to an SSC Server by using the MSC of the called party; g) performing a single-hop decision by using an SRC, and executing the decision by using an SCN; and h) getting through satellite single-hop communication, and answering by using the called party. The method can be used in satellite mobile communication.

Description

Satellite mobile communication method based on star top base band exchange

Technical field

The present invention relates to satellite mobile communication, relate in particular to a kind of satellite mobile communication method, belong to technical field of satellite communication based on star top base band exchange.

Background technology

Satellite mobile communication comprises Globalstar mobile communication and Globalstar fixed communication, and it is by user's handheld terminal, by the ground juncture station, by communication satellite, realizes and other user's communications.This communication technology has the advantage of seamless covering and high security, as long as covering just can be realized in the place that can see day, in remote desert, Gobi desert, forest and wide remote rural areas such as prairie, communicating by letter also can be unblocked.And satellite moves has high fail safe, and it is incomparable to be that ground is moved.

China is vast in territory, with a varied topography, the desert, the plateau, the mountain region, the grassland accounts for sizable area, but wherein some areas covering of common mobile communications network of still being unrealized, conduct a field operation in these areas, scientific research is investigated, oil exploitation, geological prospecting, when explorations etc. are movable, the effect of satellite moving telephone can't substitute, and country tackles Emergent Public Events (natural calamity for improving in recent years, the accident disaster, public health emergency, the burst social security events) emergency response capabilities have very high requirement, the each province has all set up emergency communication and has ensured headquarter, to tackle the communication support work of various emergency events.These all are the applications of satellite mobile communication.

Satellite mobile communication system utilizes the multiple access transmission means of satellite communication, for global user provide large span, on a large scale, at a distance the roaming and motor-driven, flexible movement communication service, be the expansion and the extension of land cellular mobile communications system, in remote area, mountain area, island, be subjected to disaster area, ocean-going vessel to only reach communication aspects such as oceangoing voyage aircraft to have more unique advantages.Satellite mobile communication system by used track branch, can be divided into stationary orbit (GEO) and middle orbit (MEO), low orbit (LEO) satellite mobile communication system.GEO systems technology maturation, cost are relatively low, can provide professional GEO system that INMARSAT system, North America satellite moving system MSAT, Australian Satellite mobile communication system Mobilesat system are arranged at present; The LEO system has that propagation delay time is short, path loss is little, the easy whole world of realizing covers and avoided the advantage such as crowded of stationary orbit, and exemplary systems has systems such as Iridium, Globalstar, Teldest at present; MEO then has the pluses and minuses of GEO, two kinds of systems of LEO concurrently, and exemplary systems has Odyssey, AMSC, INMARSMT-P system etc.In addition, also has zonal satellite moving system, as the AMPT in Asia, the N-STAR of Japan, the ECO-8 system of Brazil etc.

Satellite has huge area coverage, and synchronous communication satellite just can the mulched ground sphere area 1/3, as long as there are three synchronous satellites just can realize the whole world regional communication except that south poles.This has become intercontinental in the world and remote important communication mode, and also occupies market in the car in the field, land, sea, air of some areas, ship, aircraft mobile communication.But synchronous communication satellite can't be realized the mobile communication of personal mobile phone.Address this problem the communication satellite of low orbit in can utilizing.In low-orbit satellite have only hundreds of km or several thousand kms apart from ground, it on earth sky rotate around the earth fast, therefore be called asynchronous earth satellite, or claim moving communication satellite, this satellite system is that target designs with personal mobile phone communication." according to star " system, " GlobalStar " etc. are more typically arranged.These systems with in tens, the low orbit grapefruit satellite gets up whole earth surface coverage, just looks like a cell mobile communication systems covering the whole world " to be turned around " be arranged on the sky.Every satellite can covering diameter be the area of hundreds of km, and is more much bigger than the area coverage of terrestrial cellular cell base station.

In earthquake relief work process to the Sichuan Wenchuan earthquake, in wired, wireless telecommunications, have no progeny, though important function has been brought into play in satellite communication, also exposed the deficiency that China's satellite communication system construction exists.Up to the present, China does not also have the satellite mobile communication system of independent research, " No. one, the Big Dipper " terminating machine of independent development can only be got in touch by the form and the command centre of short-message sending, makes rescue personnel in the Wenchuan earthquake can only use as external satellite mobile communication system such as marine satellite phone and command centre and carries out voice communication.In order to change this situation, independent research is used for the new satellite of voice communication, and is significant for the demand that satisfies China's emergency communication.

With domestic the research that utilizes satellite repeater to carry out the voice communication of single-hop loopback arranged in the world before, and obtained certain achievement, but in the research before, the ground gateway station is based on the framework of 2G mobile communication system mostly, does not have complete to make the speech business of satellite single-hop insert scheme based on the 3G mobile communication system.Some achievements in research related to the present invention have below been enumerated.

[Saurabh Garg, Vivek Kansal Hughes Software Systems, India, " Cost Effictive PersonalCommunications Using GEO-Synchronous Satellite " ICPWC 1996] described a kind of can seamless access ground PSTN and the personal wireless communications system that utilizes the geostationary gso satellite communication of PLMN, description according to article, this system has the ability of carrying out the single-hop speech business, can provide data service in addition, facsimile service, emergence call service, voice mailbox service, short message service and other supplementary services.The PLMN that ground segment inserts is a GSM 2G network.

[summer river true two; Gloomy abundant it, the open application number/patent No. of China: 96111195, " moveable satellite communication terminal system ", on 04 30th, 1997] a kind of satellite communication terminal system disclosed.This system comprises: the mobile satellite communication terminal; Jockey; Radio Phone unit of forming by machine tool and handset etc.Have the ability of conversing from away from communication terminal and other innings via satellite of the place of satellite communication terminal, this solution is based on the double jump voice communication of satellite transparent forwarding.

[KOLEV J, HOIRUP C, HOYIRUP C, et al, US Patent 6108318-A, " Satellite basedtelecommunications system with user terminals and terrestrial network-establishes commonchannel on satellite between user terminals to synchronise protocol parameters for 1st userterminal with corresponding protocol parameters for 2nd user terminal across 3rd single hopconnection via satellite ", Aug.22,2000] disclose between a kind of solution satellite voice communication system (ACeS) user terminal and to use speech business when single-hop is changeed in double jump, because data link layer protocol (Data Link Protocol) does not match and causes the method for frame losing phenomenon, this method has solved when the single-hop speech business is changeed in double jump the stationary problem of protocol parameter between the user, changes single-hop speech business idiographic flow but propose double jump.

[KOLEV J, HOIRUP C, KOLEV J P, et al, US Patent 5956646-A, " Signalling method forsynchronising transaction identifiers in mobile satellite communications-adding newinformation element in assignment command message transmitted to each mobile unit duringmobile-originated and mobile-terminated call establishment processes ", Sept.21,1999] disclose and a kind ofly connected when setting up, by the method for default new business services parameter predigesting communication process in satellite voice communication system (ACeS) user terminal signaling.

[JOSHI C, NOERPEL A, SU C, US Patent 6353738-B1, " Single-hop terminal-to-terminalcall implementing method in mobile satellite system; involves establishing satellite channels forsignaling originating terminal from gateway ", Mar.5,2002] disclose during a kind of solution satellite mobile communication system (MSAT) voice single-hop business carries out, the method of user terminal and ground gateway station exchange of signaling, the method helps in the single-hop voice communication course, and gateway station can detect voice communication quality in real time.

[USHER M P, MEAD A R, US Patent 2002045444-A1; " Satellite telephone network foron-board vehicle communication system, has fixed telephone network which suspendsforwarding of calls to mobile telephone network when mobile telephone network is inactive "; Apr.18,2002] disclose a kind of airborne, carrier-borne terminal and in different land cordless communication networks, realized the method switched.

Summary of the invention

The object of the present invention is to provide a kind of satellite mobile communication method of being convenient to implement of handling based on star top base band exchange, realize from traditional based on transparent forwarding on the star to transition and transformation based on the satellite mobile communication of star top base band exchange.

The structure of traditional satellite mobile communication system as shown in Figure 1a, comprise user terminal (representing) with MS or UE, satellite (representing) with SAT, wireless access network (is represented with SRAN, mainly comprise GNB and GNC etc.) and core net (represent with CN, mainly comprise CS-MGW, MSC Server, SGSN, HLR etc.), it adopts the thought of hierarchical design, realizes service logic and control, separation between the carrying, its method of mobile communication comprise that RRC connects foundation, calling subscriber's authentication and identity validation, route and call bearer are set up, called paging, called subscriber's authentication and authentication, six main processes such as called subscriber answer.In this satellite mobile communication method, satellite adopts the working method of complete transparent forwarding, and corresponding " double jump " voice communication and terrestrial cellular mobile communication call flows be significantly difference not.

Different with traditional satellite mobile communication system, satellite mobile communication system of the present invention is shown in Fig. 1 b, increased satellite Control Node (representing) with SCN, satellite path control deivce (representing) and satellite exchange coordination server (representing) with SSC Server with SRC, SCN is connected with SRC with SAT respectively, SRC respectively with SCN, GNC is connected with SSC Server, SSC server then is connected with MSC Server with SRC.For realize from traditional based on transparent forwarding on the star to transition and transformation based on the speech business of star top base band exchange, SCN makes amendment to exchange processing array network on the star through specific radio-frequency channel, and the double jump looped-back traffic that makes original user handle through the ground network exchange is directly transmitted through satellite and carried out the transmission of single-hop winding.That is to say, the principal character of satellite mobile communication method of the present invention has been to set up on the star and has exchanged the communication traffic channel of handling, the calling and called voice messaging is by this channel transfer, rather than exchanges and transmit by communication network main body (promptly being positioned at the SRAN and the CN on ground).Simultaneously, based on the disposal ability of payload on the star, manage this communication traffic channel main body (being SCN, SRC and SSC Server) on the ground.

SRC is as core network element of the present invention, finish switching network resource management and exchange routing decision on the star, two necessary conditions are arranged, the firstth, there is Ground Control layer network entity to send the application of single-hop call treatment, the secondth, obtain the user link channel information of voice service communicating pair, and take this as a foundation and make the decision-making that can carry out single-hop exchange on the star.

Specifically, call flows of the present invention comprises following eight process: RRC connection foundation, calling subscriber's authentication and identity validation, route and call bearer foundation, called paging, called subscriber's authentication and authentication, star top base band exchange processing application, the professional execution of star top base band exchange and called subscriber answer.As seen, the distinguishing characteristics of the present invention and prior art embodies a concentrated reflection of star top base band exchange and handles application and professional these two processes of carrying out of star top base band exchange.

The invention provides a kind of satellite voice communication scheme based on the processing of star top base band exchange of practicality, such scheme has some following beneficial effects:

(1) can partly realize single-hop loopback voice communication through satellite repeater, shorten the professional propagation delay time that Business Stream is brought at ground switching network double jump loopback;

(2) need not revise original 3GPP about the defined network element interface of WCDMAR4 version voice communication, communication protocol.Only realized star top base band exchange voice service by newly-increased interface, communication protocol and communication process;

(3) can keep simultaneously having reduced the call drop probability of inserting of satellite Speech Communication through the single-hop loopback voice communication of satellite repeater with through the double jump loopback voice communication of ground switching network;

(4) can continue to use the main equipment of the existing land mobile communication network equipment substantially as satellite mobile communication network;

(5) the voice communication flow process of compatible 3GPP definition, after being convenient to further upgrading and revising, realization and UMTS and PSTN intercommunication voice.

(6) the present invention based on system configuration in because GNC, GNB and MSC Server occur in pairs, therefore more simple on the position zoning is divided, this has brought convenience for the simplification call treatment.

Description of drawings

Fig. 1 is the satellite mobile communication system organization plan figure that the present invention relates to;

Fig. 2 is that the RRC of embodiment connects the method for building up schematic diagram;

Fig. 3 is the method for routing foundation schematic diagram of embodiment;

Fig. 4 is the paging called partner method schematic diagram of embodiment;

Fig. 5 is called authentication and authentication and the capability negotiation schematic diagram of embodiment;

Fig. 6 is that the star top base band exchange of embodiment is handled the application schematic diagram;

Fig. 7 is the professional manner of execution schematic diagram of the star top base band exchange of embodiment (only setting up the single-hop winding connects);

Fig. 8 is the professional manner of execution schematic diagram of the star top base band exchange of embodiment (double jump of both having set up via ground network connects, and sets up the single-hop winding again and connects);

Fig. 9 is that the single-hop of embodiment is called out connection method for dismounting schematic diagram.

Embodiment

In conjunction with the accompanying drawings the present invention is further described below by specific embodiment.

Specific embodiments of the invention are based on the compatible system of 3G and (particularly are based on 3GPP/UMTS Release 4 reference models [3 ^RdGPP Technical Specification Group Services and Systems Aspects:Networkarchitecture, Release 4,3GPP TS 23.002 V4.8.0,2003-06]) time possess the call setup and the dismounting scheme of the satellite mobile communication system of limited single-hop loopback voice communication capability.

In the satellite mobile communication system that present embodiment relates to, a MSC Server/VLR service area comprises and only comprises a GNC and GNB.Therefore, divide in the network area, MSC Server/VLR service area overlaps with lane place (LA).Comprise the sub-district that different beams constitutes under the MSC Server/VLR service area (or a lane place).Be that the user moves in same MSC Server/VLR service area, do not need to do the position and upgrade.

One, based on the call setup scheme of star top base band exchange

The designed call setup flow process of present embodiment is based on the GEO satellite mobile communication system, and process is set up in the voice communication that utilizes star top base band exchange function to implement.Be divided into RRC altogether and connect eight main processes such as foundation, calling subscriber's authentication and identity validation, route and call bearer foundation, called paging, called subscriber's authentication and authentication, star top base band exchange processing application, the professional execution of star top base band exchange, called subscriber answer.Wherein, called subscriber's authentication and authentication, star top base band exchange processing application process are carried out simultaneously, and all the other processes are carried out according to time sequencing.

1. setting up RRC connects

It is in order to set up the signaling connection between UE and the SRAN that RRC connects.The RRC connection is always initiated by UE.Synchronization, same UE can only be set up a RRC at most and connect.When UE is in idle pulley, connect if signaling is set up in the NAS of UE (Non-Access Stratum) request, UE will initiate RRC and connect the process of setting up.Main flow process is as follows:

1) UE sends Radio Link Setup Request message, and request is set up RRC and connected.

2) GNC is according to the reason and the system resource state of connection request, and decision or the negative RRC that sets up connect, and distribute related resource.

3) GNC returns Radio Link Setup Request message to GNB, and request GNB distribution is set up RRC and connected required air-link resources.

4) after the success of GNB reserved resource, return Radio Link Setup Response message to GNC.

5) GNC sets up transmission bearer by ALCAP at Iub interface user face, and finishes the synchronizing process between GNC and the GNB.

6) GNC sends RRC Connection Setup to UE.

7) UE is sending RRC Connection Setup Complete message to GNC.

In this stage, satellite plays transparent forwarding as access network element, so this flow process almost is consistent with the RRC connection building process that 3GPP defines.

2. calling subscriber's authentication and identity validation

Compare with WCDMA R4 network authentication, in the GEO satellite mobile communication system, except network to the authentication of USIM and USIM authentication to network, also have the user to use the evaluation of single-hop speech business ability and priority, if the user does not use the ability of single-hop loopback voice communication, in the process of calling called subscriber, can not open star top base band exchange and handle application process.

3. route is set up

1) the MSC Server/VLR under the caller receives Setup message, and do not know called subscriber's position, therefore the called number that receives is analyzed, be routed to the HLR of called subscriber's ownership, MSC Server/VLR foundation under the caller and the MAP dialogue between the HLR, and to the request of HLR initiation routing iinformation.

2) HLR receives the MSISDN that the calling subscriber belongs to MSC Server transmission, needs be converted to corresponding IMSI to MSISDN by IMSI and MSISDN correspondence table among the HLR.

3) HLR sends the request of Providing Roaming Number to the MSC at called place Server/VLR then according to the MSC SERVER/VLR number of IMSI index search to the called subscriber place.

4) called MS C Server/VLR distributes the roaming number (MSRN) of a free time with after IMSI and the MSISDN binding, makes itself and IMSI set up relation one to one, and by MSRN is provided acknowledge message, returns MSRN to HLR.

5) HLR is transmitted to caller MSC Server by the routing iinformation acknowledge message with this MSRN.

6) the MSC Server under the caller by MSRN utilize the BICC signaling set up with called affiliated MSC between be connected, MSC Server/VLR under called can retrieve the IMSI that obtains this UE by this MSRN, and discharging MSRN, called affiliated MSC Server/VLR carries out paging to the lane place at called UE place.

4. paging is called

The present invention based on system configuration in a MSC Server/VLR service area comprise and only comprise a GNC and GNB.Therefore, as long as set up connection between the calling and called MSC Server, just be equivalent to set up the connection between the GNC under the calling and called.In the process of paging called UE, GNC will carry out paging to all beam zones of its management.

The paging called flow is made up of following main flow process:

1) CN sends Paging message to GNC and opens paging.The parameter that beep-page message carries comprises CN territory deictic word (CS Domain identifier), called subscriber IMSI, paging domain ID (location area identifier), paging reason (SpeechCall) etc.

2) GNC sends beep-page message to UE, and major parameter comprises CN territory deictic word, paging reason, paged UE sign.

3) UE monitoring seek channel, be informed in when on the own affiliated paging time-slot beep-page message being arranged, change paging channel paging receiving message over to, and the UE in beep-page message sign compared with self identification, if both are identical, send to GNC and to comprise UE sign, RRC and connect and set up the isoparametric RRC of reason and connect the request of foundation.

4) GNC wave beam GNB under the called subscriber sends Radio Link and sets up request (Radio Link Setup Request).

5) after GNB finishes Radio Link foundation, by Radio Link Setup Response information reporting GNC;

6) GNC uses the ALCAP agreement to set up the Iub bearer context for data transmission.

7) GNB obtains uplink synchronous at Iub interface, by NBAP message informing GNC.

8) Iub interface carries out downlink synchronization between GNC and the GNB.

9) Iub interface carries out uplink synchronisation between GNB and the GNC

10) GNC sends RRC Connection Setup message to UE

11) after UE finishes RRC connection configuration as requested, return RRC connection foundation to GNC and finish.

5. called authentication and authentication and capability negotiation

Similar among this part process and the WCDMA R4, idiographic flow is:

1) UE sends Initial Direct Transfer message to GNC, and parameter comprises NAS message (page response).

2) GNC sends Initial UE Message message to CN, and major parameter comprises NAS message (page response), UE sign (TMSI) and overall RNC sign etc.

3) CN sends Command ID message to GNC, and major parameter comprises permanent NAS UE sign (IMSI), and CN requires GNC to set up safe mode.

4) GNC sends Security Mode Command message to UE.

5) UE reports GNC after finishing the safe mode configuration.

6) GNC reports the safe mode setting to finish to CN.

7) CN sends Direct Transfer message to GNC.

8) GNC sends Downlink Direct Transfer message to UE.Major parameter comprises NAS message (Setup)

9) UE sends Downlink Direct Transfer message to GNC, carries NAS message (Call Confirm)

10) GNC sends Direct Transfer message to CN, carries NAS message (Call Confirm).

6. star top base band exchange is handled application

For the user who inserts the GEO satellite mobile communication system, when using speech business, can apply for business (being so-called single-hop speech business) based on star top base band exchange.Whether judge according to the signatory situation of user or according to priority whether the user can use the single-hop speech business to discuss here.

Whether this flow startup depends on whether the called subscriber has enough authorities when finishing authentication and capability negotiation.If the called subscriber does not have authority to use the single-hop business, above ground portion is set up beginning to carry out service bearer, and at this moment, satellite portion will continue to carry out the transparent forwarding function, and the service link of being set up has passed through ground network exchange transmission.

Following flow scheme design is that default user has begun to apply for the single-hop business.This flow process activates after the called subscriber finishes authentication authentication and capability negotiation.

Idiographic flow is as follows:

1) the MSC Server/VLR under the caller sends initial address message (IAM) to the MSC Server/VLR under called, it is relevant that mode is set up in the parameter that IAM carries and carrying, mainly contains the application that calling/called number, call reference, the encoding list, carrying are set up mode, bearer properties and be used to trigger the single-hop voice flow.

2) called affiliated MSC Server/VLR starts single-hop voice application process after receiving IAM message, sends Single Hop Request message to the SSCServer application.Single Hop Request message comprises the calling authority that calling and called user IMSI, the numbering of the GNC under it, calling and called user have etc.

3) SSC Server transmits Single Hop Request message to SRC.Send single-hop application connect message to called affiliated MSCServer/VLR simultaneously.MSC Server/VLR under called receives behind the connect message the replacement timer.

4) after SRC obtains the affiliated GNC number of calling and called of single-hop application, send radio resource request message according to call number to calling and called GNC, GNC makes judgement according to Radio Resource algorithm on the specific star, if agree the single-hop request, then be ready to the required Radio Resource of single-hop, postback SAT Radio Resource Response message.Determine if not, then beam back SAT RadioResource Reject message, start single-hop speech business rejection flow process.

So far, SRC has carried out the star top base band exchange processing preparation of voice.

7. star top base band exchange is professional carries out

In wireless resource information on the star that acquisition GNC provides and after being ready to related resource, SRC has carried out the star top base band exchange of this conversation and has handled preparation, but before the called subscriber connects, still can not use star top base band exchange function.Need to activate SRC and start this flow process.

In general, called affiliated MSC Server is the key equipment of speech business star top base band exchange processing execution.At first, the execution that speech business star top base band exchange is handled is prerequisite with successful paging to terminal called, if the terminal called paging failure, speech business star top base band exchange processing procedure will stop.Secondly, the execution that speech business star top base band exchange is handled is successful standard with called off-hook conversation, as long as calledly do not carry out off-hook action, speech business star top base band exchange handle timer then after, can start speech business star top base band exchange equally and handle termination process.After called UE is finished after the safe mode control procedure and confirmed to insert CN, can become the single-hop voice and carry out start-up time.

About two different selections are arranged start-up time of speech business star top base band exchange processing execution flow process.Whether the final influence that these two different selections bring sets up the double jump loopback voice flow carrying through the ground switching network.

First method is to send before RAB sets up request to GNC at CN, and after UE and CN finished the safe mode control procedure, UE was to GNC transmission Security Mode Complete message, and GNC also reports this message to CN immediately.Activate the single-hop voice and carry out flow process.

Idiographic flow is:

1) called GNC sends Direct Transfer message to CN, carries NAS message-Call Conform (comprise the Piggybacking ability, call out control ability), activates the single-hop voice and carries out flow process.

2) the MSC Server under the called UE sends Single Hop Execution message to SSC Server, and flow process carried out in beginning single-hop voice.

3) SSC Server transmits Single Hop Execution message to SRC.

4) SRC replys SSC Server, and SSC Server issues ring-back tone message to MGW, and ring-back tone is received in caller.Simultaneously, SRC is by SSC Server and called affiliated MSC Server notice called terminal ringing.

5) SRC assigns single-hop decision-making decision on the star to SCN, and SCN carries out.The satellite one hop link is communicated with.

Second kind may be that terminal called sent Radio Bearer Setup to CN after called RAB connection foundation was finished

Complete message is represented that called radio bearer has been set up to finish, and in this time, calling both sides does not begin conversation as yet, but has set up a double jump Traffic Channel.As long as called off-hook just can utilize this double jump Traffic Channel to communicate.After MSC Server under called receives Radio Bearer Setup Complete message, start single-hop and carry out flow process, will make the intercommunication link from the double jump switch to the single-hop.

Idiographic flow is:

1) CN sets up RAB with called UE and is connected, set up finish after, UE is to GNC loopback Radio Bearer Setup message.GNC is to CN loopback RAB Assignment Response message.

2) the MSC Server under the called UE sends Single Hop Execution message to SSC Server, and flow process carried out in beginning single-hop voice.

3) SSC Server transmits Single Hop Execution message to SRC.

4) SRC assigns single-hop decision-making decision on the star to SCN, and SCN carries out.The satellite one hop link is communicated with.

See with regard to these two kinds of methods, cut both ways that therefore the first method design, does not need to set up the required RAB of double jump voice owing to just carried out the execution of single-hop voice before setting up RAB again, in called off-hook, just directly carry out the part simple switched and handle.Save radio resources, flow process is simple.Simultaneously, need not carry out the synchronous of single-hop and double jump voice on the star, alleviate the burden of load on the star.But in a single day the call drop situation appears in the link of setting up like this, can not use the double jump speech connection.Must restart call flow.Calling and called are from conversation, and speech stream can intactly be implemented the single-hop voice with regard to only carrying out base band exchange via satellite in whole communication process.

Second kind of way, owing to having set up double jump RAB, so also need to set up the professional connection of single-hop, behind called subscriber's off-hook, possible single-hop voice are carried out flow process and are not also finished, and the switching of double jump commentaries on classics single-hop may make speech interrupt or repetition on the star.But,, can when single-hop voice call drop appears in the user, carry out the double jump voice compensation owing to set up two different Traffic Channels.

8. called subscriber answer

Behind the called subscriber answer, speech stream is transmitted by the Traffic Channel of setting up, and communicating pair carries out proper communication.Two, based on the call tear down scheme of star top base band exchange

After star top base band exchange business is set up,, must discharge the calling of setting up and connect owing to reasons such as call drop or user's on-hooks.

Call tear down should be removed the single-hop voice link, also will remove the double jump voice link.Discharge resource, Radio Resource and cable resource on the star.

If call out and only to set up single-hop and connect, in the voice call process, UE and RRC between the GRAN are connected still existence always.Still be the called call tear down that begins to carry out no matter, all connect and discharge from RRC from caller.Be not connected and radio bearer with the Iu of CN owing to not needing to discharge ground G RAN, as long as connect on the load release star on the SRC control SCN control star, the single-hop connection promptly is removed.

Single-hop connects call tear down scheme (called first on-hook) specific as follows:

1) called UE sends call link to GNC and removes request Disconnect.

2) GNC transmits Disconnect message to called MS C Server.

3) called MS C Server transmits Disconnect message to caller MSC Server.Caller MSC Server notice caller place GNC and calling UE.

4) called MS C Server transmits Single Hop Disconnect message to SSC Server.

5) SSC Server informs Single Hop Disconnect message to SRC.

6) SRC notice calling and called GNC discharges resource (wave beam resource, Radio Resource or the like) on the star.

7) GNC replys and discharges the resource success.Discharging RRC connects.SRC notice SCN carries out and discharges single-hop connection on the star.

8) after the release successful connection, SCN replys SRC.

Connect to remove for double jump, be connected with RRC with Iu with RAB between the CN and be connected because exchange needs to discharge UE, MSC Server also will control MGW release circuit switching destination node with related.Therefore SRC does not participate in dispose procedure.Because during double jump connected, satellite can be considered as transparent forwarding, so double jump connects voice link similar process among dismounting and the UMTS.

Single-hop connects call tear down scheme (called first on-hook) specific as follows:

1) called UE sends call link to GNC and removes request Disconnect.

2) GNC transmits Disconnect message to called MS C Server.

3) called MS C Server transmits Disconnect message to caller MSC Server.Caller MSC Server notice caller place GNC and calling UE.

4) called end MSC Server control MGW deletion relevant final node is with related.

5) called end discharges RAB, Iu successively and connects and to be connected with RRC.

6) calling terminal MSC Server control MGW deletion relevant final node is with related.

7) calling terminal discharges RAB, Iu successively and connects and to be connected with RRC.

Claims (7)

1. the satellite mobile communication method based on star top base band exchange comprises the following steps:

A) RRC that sets up between caller and the SRAN connects;

B) to called authentication and the identity validation of carrying out;

C) set up the MSC of caller and the connection between the called MSC;

D) paging is called;

E) carry out authentication and authentication to called;

F) called MSC communicates to connect to SSC Server application single-hop;

G) SRC carries out the single-hop decision-making, and SCN carries out decision-making;

H) the satellite single-hop communication is connected, called party answer.

2. the satellite mobile communication method based on star top base band exchange as claimed in claim 1 is characterized in that, step a) is undertaken by following method:

I. the RRC connection is set up in the caller request;

Ii.GNC request GNB distribution is set up RRC and is connected required air-link resources;

Iii. through caller and GNC two-way confirmation, RRC connects foundation.

3. the satellite mobile communication method based on star top base band exchange as claimed in claim 1 is characterized in that, step c) is undertaken by following method:

I. the MSC Server under the caller is routed to called described HLR, and initiates the routing iinformation request to HLR;

Ii.HLR finds the MSC Server at called place, and the MSC Server under called sends the mobile station roaming number request;

Iii. the MSC Server under called returns mobile station roaming number to HLR;

Iv.HLR is transmitted to the affiliated MSC Server of caller with this mobile station roaming number

V. the MSC Serve under the caller set up with called under MSC Server between be connected, called affiliated MSC Server carries out paging to the lane place at called place.

4. the satellite mobile communication method based on star top base band exchange as claimed in claim 1 is characterized in that, step d) is undertaken by following method:

I. the MSC Server under called opens paging;

Ii.GNC is to called transmission beep-page message;

Iii. called monitoring seek channel is informed in when on its affiliated paging time-slot beep-page message being arranged, and changes paging channel paging receiving message over to, sends RRC to GNC and connects the request of foundation;

Iv.GNC request GNB distribution is set up RRC and is connected required air-link resources;

V. called by after confirming with its affiliated GNC, finish paging.

5. the satellite mobile communication method based on star top base band exchange as claimed in claim 1 is characterized in that, step f) is undertaken by following method:

I. the MSC Server under called starts single-hop voice application process after receiving IAM message, files an application to SSC Server;

Ii.SSC Server transmits single-hop voice solicitation message to SRC;

Iii.SRC sends radio resource request according to GNC call number under the calling and called to calling and called GNC, and GNC makes judgement according to Radio Resource algorithm on the star of setting, if agree the single-hop request, then is ready to the required Radio Resource of single-hop; Determine if not, then single-hop voice application process stops.

6. the satellite mobile communication method based on star top base band exchange as claimed in claim 1 is characterized in that, step g) is undertaken by following method:

I.MSC Server sends single-hop voice acknowledge message through SSC Server to SRC, and flow process carried out in beginning single-hop voice;

Ii.SSC Server issues ring-back tone message to MGW, and ring-back tone is received in caller; Simultaneously, SRC is by SSC Server and called affiliated MSC Server notice called terminal ringing;

Iii.SRC assigns single-hop decision-making decision on the star to SCN, and SCN carries out.

7. the satellite mobile communication method based on star top base band exchange as claimed in claim 1 is characterized in that, step g) is undertaken by following method:

I. the MSC Server under called is connected with the called RAB of foundation, after foundation is finished, calledly confirms to core net by GNC;

Ii. the MSC Server under called sends single-hop voice acknowledge message through SSC Server to SRC, and flow process carried out in beginning single-hop voice;

Iii.SRC makes the message of revising switching matrix on the star to SCN, and SCN carries out.

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