CN1293876A

CN1293876A - Method and system for routing call between cellular subsystems

Info

Publication number: CN1293876A
Application number: CN99804098.3A
Authority: CN
Inventors: 蒂莫·哈尼宁; 特罗·兰塔拉; 马库·劳蒂奥拉; 塔皮奥·西克; 汉努·瓦伊尼奥-马蒂拉
Original assignee: Nokia Networks Oy
Current assignee: Nokia Oyj
Priority date: 1998-03-18
Filing date: 1999-03-18
Publication date: 2001-05-02
Also published as: WO1999048311A3; WO1999048311A2; JP2002507869A; AU2839199A; EP1064804A2

Abstract

A communication system, comprising a network switching system (MSC) and in addition to a conventional subsystem (BSS) comprises a second subsystem (WIO, BTS) accessible by a first group of mobile subscribers of the communication system. Said second subsystem comprises means (ILR, GK) for mapping a number identifying a mobile subscriber in the communication system to a network address of the second subsystem (WIO, BTS) when the mobile terminal of the mobile subscriber is able to communicate with a base station (BTS) of the second subsystem (WIO, BTS).

Description

A kind of method and system of selecting the route of the calling between the cellular subsystems

The present invention relates to a kind of method and system that is used for telecommunications, relate in particular to public and integrated application private wire network.

Along with first generation digital cellular telephone comes into the market, telecommunications industry has obtained swift and violent development.Nowadays, although the digital mobile technology speech quality resemble GSM is suitable substantially not as the ordinary fixed telephone.Except this remarkable advantage of activity, this also is that increasing people uses a cellular reason.Under many circumstances, even in office, compare people with fixing telephone and more be willing to use cell phone.Usually, in any case mobile communication connect all than fixedly connected expense height.Therefore, total telephone expenses that may increase company in office outdoor application wireless connections are paid wages, because the user adopts the communication means that optimum working efficiency can be provided usually.

Another kind of noticeable trend is the popularization of many new products of IP telephony system.IP phone is to make the collaborative a kind of emerging technique device by existing IP-Based LANs (LAN), wide area network (WAN) and internet of speech, data and video.IP phone has lot of advantages, and one of them advantage is that it can use by a kind of (cost-efficient) mode of calculating of routine call business (for example making a long-distance call) that realizes.

In the past, each mechanism has all applied independent network and has handled traditional speech, data and video traffic.Because miscellaneous service has different transmission requirements, therefore, these network installations, safeguard and reconfigure the cost height.And, in general, also need independent terminal for diverse network, from user perspective, this has increased expense makes thing complicated simultaneously.Moreover, owing to be different on these network physicals, therefore integrate very difficult, thereby limited their potential use.

In private branch exchange (PBX), the conventional method of cost saving is to utilize inner short dialed number to select route in a kind of Internal call (that no matter fix or mobile).In any case this method all needs number information, this information is not existing when needed usually.The user who depends on the subscriber's number book in the memory that is stored in its portable terminal is unwilling to preserve and use a plurality of numbers of someone usually, and therefore mobile subscriber number commonly used will be the outer call routing of office's infrastructure.Here and in following each paragraph, " office " represents an environment with a plurality of users, and these users are relevant with certain Business Entity (such as company), and the communication service that this entity provides of for good and all or temporarily having the right to insert.

Also suggestion in addition, the dual mode phone inserts local private network (as DECT) when office, and office outside time access public network (as GSM).In this system, number can be transformed, so that can utilize certain user of single number call.In any case this situation all requires in office's construction and safeguards that overlapped communication network also has business, the internet that for example leaves someone desk inserts the relative smaller applications scope that is limited in.

The up-to-date device that switch is connected with computer system is to adopt comprehensive (CTI) gateway of compuphone.CTI is most commonly used to such environment, and wherein information repository (as database) must be visited by each incoming call.This makes people to call out the additional information that receives relevant client according to Inbound Calls, for example Yi Qian purchase history, preference, address etc.Yet, when adopting this CTI to use, the open application programming interfaces access switch that requirement can provide by gateway.Moreover in existing C TI system, in fact speech and data are not merged but concurrent working mutually.

Here, invent a kind of communication system, in this system, overcome above these problems and restriction, obviously alleviated their influence in other words.In the solution of the present invention, new network element is used for intraoffice network and mobile network for public are linked, and makes, when the user in office during the location, send calling to him by the office communication net, and when the user is outside office, send calling to him by mobile network for public.The interface that arrives portable terminal makes that conventional portable terminal also can both use no matter how situation is still the same for route in office and outside office.As user during in office, the mobile subscriber number of mobile network is transformed to the relevant network address, thereby makes and can use a unique Subscriber Number, is used to visit certain user.The route of office call (promptly being linked into the calling between the user of intraoffice network) is selected by intraoffice network, therefore only in office's infrastructure contact professional and spend corresponding cost.

According to a first aspect of the invention, provide a kind of communication system, this system comprises: internet exchange system and one comprise first subsystem of one or more base stations by air interface and communication of mobile terminal; With second subsystem that comprises one or more base stations by air interface and communication of mobile terminal.Second subsystem can allow first group of mobile subscriber of communication system insert, and comprise: one or more network element, being used in the future, the conversion of signals of automatic network switching system is the packet of second subsystem and the signal that is used for the packet from second subsystem is converted to internet exchange system, one or more network element that are connected with one or more base stations of second subsystem, being used for the conversion of signals from the internet exchange system of base station is the packet of second subsystem and the signal that is used for the packet from second subsystem is converted to the internet exchange system of base station.Described second subsystem comprises that also the network address that is used for according to being assigned to the network element of second subsystem transmits the device of the packet of second subsystem; With the FH-number transform that is used for when mobile subscriber's portable terminal can be with the base station communication of second subsystem, will identifying the mobile subscriber of communication system be the device of the network address of second subsystem.

Of the present invention also have the network element described in an aspect such as independent claims 9 and 14 illustrated, and the method described in independent claims 16 is illustrated.Preferred implementation of the present invention is as described in the appended claims.

From user perspective, benefit of the present invention is that the required function of preferred route is transparent to him.In the office and the activity outside the office fully can be supported, and the employee no longer needs to consider to use the different expenses that network brought.Whether a user can use a number, and need not consider to call out in office.Moreover compuphone comprehensively allows the wide spectrum of higher level service.

From company's angle, of the present invention also have a benefit to be can improve professional quality and quantity under the situation that does not increase expense.In many cases, in addition can minimizing expense.Comprehensive by compuphone, improved professional managerial and adaptability, thereby brought better service to the client, in a word, this has improved productivity ratio.

Preferably a kind of network based on IP (Internet Protocol) of intraoffice network, it can be simple LAN, also can be the WAN of company of complicated interconnection.The digital Public Land Mobile Nerwork (PLMN) that preferably a kind of network operator of mobile network for public provides and safeguards, it can provide honeycomb to cover for the zone interior portable terminal more much bigger than the office location.Although can also use the system any standard or any multiple access bind mode (as time division multiple access, code division multiple access) that supports because the wide whole world of gsm system covers, therefore here with this system as preferred implementation.

In order to understand the present invention better and in order to illustrate how the present invention implements, and illustrates below with reference to accompanying drawings, wherein:

Fig. 1 has illustrated the basic thought of system of the present invention;

Fig. 2 has illustrated by the business that network processes is dissimilar;

Fig. 3 has illustrated the H.323 scope of specification requirement;

Fig. 4 has illustrated the present invention program's various Core Features and these functions configuration mode for access function;

Fig. 5 has illustrated the structure of system of the present invention;

Fig. 6 has illustrated the storage of the information of mobile user of being managed about the in-house network location register and the realization of search function;

Fig. 7 has illustrated the functional structure of A-gateway unit;

Fig. 8 has illustrated the structure of ISDN/IP gateway;

Fig. 9 has illustrated the functional structure of in-house network mobile cluster;

Figure 10 has illustrated the functional unit and the interface of the WIO outpost of the tax office (gatekeeper);

Figure 11 has illustrated the functional unit of in-house network mobile cluster;

Figure 12 has illustrated the interface of present embodiment;

Figure 13 has illustrated the method for the selective call route in the system of the present invention;

Block diagram illustrations among Fig. 1 utilize the basic thought of GSM as the system of the present invention of mobile network for public.In the gsm system of routine, mobile station MS utilizes radio communication to be connected with base station BTS.Base station BTS is connected with base station controller BSC by so-called Abis interface again, and a plurality of base stations are controlled and managed to this base station controller.A plurality of base station BTS are called base station sub-system BSS with the entity of the single base station controller BSC formation of these base stations of control.Specifically, base station controller BSC management of wireless communications channel and handover.On the other hand, base station controller BSC also is connected with mobile services switching centre (MSC) by so-called A interface, and mobile services switching centre is coordinated travelling carriage and from the establishment of connection of travelling carriage.By mobile services switching centre MSC, can also set up and being connected of the user who in mobile radio communication, does not work.

In system of the present invention, be connected with intraoffice network LAN on the on-site base station BTS function of the WIO of office (wireless Internet office), intraoffice network LAN is connected with MSC by IP network.When in the area of coverage of MS at base station BTS, will handle mobile incoming call and mobile originating by intraoffice network LAN, and other are professional as GSM data, fax and short message.When MS is not in the area of coverage at base station BTS, will manage business in the usual way by BSS.

Should be noted that Fig. 1 is the scheme explanation of a simplification.An above MSC can be arranged, and they can be connected with a plurality of other communication networks (as PLMN, PSTN and ISDN).LAN can be connected with another LAN of the same Business Entity at another place, and they can connect by the IP/ in-house network.

In the past, dissimilar medium are that speech, data and video transmit respectively.The latest development of IP phone makes can concentrate by single network handles dissimilar business, as shown in Figure 2.IP phone is by specifying a kind of common transmission media IP to come mixed voice, video and data for each is professional.Specifically, IP phone adopts open IETF (Internet Engineering Task Force) and ITU (International Telecommunications Union) standard, network by any employing IP transmits multimedia service, thereby can be the user flexibility of physical media aspect (for example, Plain Old Telephone Service circuit, ADSL, ISDN, special circuit, coaxial cable satellite and twisted wire pair) and the flexibility of physical location aspect are provided.Therefore, the same ubiquitous network that carries webpage, electronic mail and data service can be used to be connected to worldwide individual, enterprise, school and government.

As a kind of preferred implementation of intraoffice network agreement, can adopt the ITU standard H.323.H.323 be open type multimedia communication (speech, video and the data) standard on a kind of connectionless networks, often be considered to " internet " video conferencing standard, but in fact be used for supporting the combination in any of audio frequency, video and data, and realize with arbitrary lan protocol (IPX, TCP/IP).The block diagram illustrations of Fig. 3 the scope of specification requirement (shown in the dotted line) H.323.H.323 for point-to-point with put multipoint conference and stipulated calling control, multimedia administration and Bandwidth Management.H.323 entrust and support standard audio and Video Codec, and by T.120 standard support data sharing.H.323 still network, platform and application mutually independently, thereby make the terminal that meets arbitrarily H.323 can with any other-end joint operation.

H.323 allow media stream through the existing packet switching network.In order to offset the influence of LAN stand-by period, H.323 adopt real time transport protocol (RTP), this is a kind of ietf standard, is used for satisfying making the requirement through the internet of real-time audio and video flowing.H.323 the overhead of each grouping is the RTP header of 12 bytes in, the UDP of 8 bytes, the link level header of the IP of 20 bytes and about 1-3 byte and frame indication.H.261 and G.711 guarantee arbitrarily that H.323 the customer support standard.H.261 be a kind of ITU standard that is used for Video Codec, be used for sending compressed video with the speed of 64kbps with the resolution of 176 * 44 pixels (QCIF).G.711 be a kind of ITU standard that is used for audio codec, be used for 48,56 and the bit rate of 64kbps send the pcm audio of A-rule and μ-Lv.H.263 and G.723 as option, H.323 the client can also support additional codecs, as.H.263 be a kind of Video Codec of ITU standard and G.723 be a kind of audio codec of ITU standard, be used for carrying out work with very low bit rate.

For system control, H.323 standard code three kinds of orders and control protocol, wherein, H.245 be responsible for controlling the H.323 control messages of terminal operation, comprise capacity exchange, order and indication.H.225.0 (Q.931) is used for setting up two connections between the terminal, and the registration between the RAS control end points and the outpost of the tax office, allows and bandwidth capability.

For based on H.323 communication system, standard code four main parts.Terminal is the client's end points on the network.All terminals all must be supported Speech Communication; And video and data support are optional.

Gateway H.323 conference arrives other networks or communication protocol.If needn't be connected to other networks or non-H.323 terminal, then not need gateway.

Two critical functions are carried out at the outpost of the tax office: address transition and Bandwidth Management.These functions help the outpost of the tax office to keep the good network state.The outpost of the tax office also uses CCF, is limited in H.323 in " district " with the quantity and the used total bandwidth of these connections that will H.323 connect.One H.323 the district be the set of the single outpost of the tax office all terminals, gateway and the multipoint control unit (MCU) managed, in system H.323, do not need the outpost of the tax office.Yet if the outpost of the tax office is arranged, terminal must be used its business.

Meeting between the end points of multipoint control unit support more than three or three.MCU comprises a desired multipoint controller (MC) and a plurality of (or not having) multipoint processor (MP).MC carries out the H.245 negotiation between all terminals, and with definite common Voice ﹠ Video disposal ability, and MP determines the route of audio frequency, video and data flow between the terminal endpoint.MCU also is optional.

System of the present invention is based on the latest development that utilizes integrated communications system, and this integrated communications system is used for mobile network for public and private network are connect, and this is of great benefit to the different user in the processing procedure.Moreover, in order to realize described system of the present invention, also invented some new unit.

Among Fig. 4, the present invention program's various Core Features and these functions configuration mode for access function has been described.From company's angle, the company that makes of system of the present invention can utilize data resource communication that telecommunication service widely is provided in inside.For public access, it is necessary cooperating with the local telecommunication network operator.From network operator's angle, the user of system of the present invention can sharing of common TCP/IP interconnection service, the resource of telecommunications network and end user's Service Access point, and can utilize other users among dedicated lan visit public network one side and the WAN of company.Recognize that influencing the PBX of CTI industry is just promoting end user's business and using towards computer environment to develop, therefore, when development value-added service and multimedia service, potential synergy is obviously.The Core Feature of system of the present invention comprises that directory enquiry service, calling control business, activity management, operation and maintenance, charging, quality of service guarantee and safety service.For example, system of the present invention can be counted as a kind of novel GSM BSS/NSS with ad-hoc location register, or regards the H.323 expansion of the packet-based multimedia communications system described in the suggestion as.

Among Fig. 5, the structure of system of the present invention has been described.As shown in the figure, all new network elements are all between A-interface and Abis interface.Below, represent to comprise new function in the system of the present invention and this entity of new unit with term WIO (wireless Internet office), in a word, protection range is not limited to any name of product relevant with system of the present invention.WIO has three different gateway A GW, IGW, IMC at least, they each distinct interface is all arranged, to distinguish the GSM or the parts of net H.323.Should be noted that according to H.323 gateway function only be one of function of being responsible for of these parts.

In network operator's one side, this WIO piece comprises network element AGW, IGW and ILR, and the purposes and the function of these network element will be described in detail in detail below.

The purposes of A-interface gateway AGW is to handle communicating by letter between intraoffice network and the mobile network for public by MSC.AGW provides signaling and the professional route between intraoffice network and the MSC, thereby is formed into the BSS interface of MSC.Therefore, from the MSC angle, WIO just looks as if one or more BSS with certain position district sign indicating number (LAC).AGW can directly utilize the A-interface to be connected to MSC.In a word, AGW may not provide code converter function, therefore, and its code converter (as the code converter TCSM2 of Nokia) that can also utilize the Ater-interface to be connected to generally to be arranged between MSC and the BSC in addition.Therefore, code converter function is not carried out in AGW unit itself, and the function of AGW is to convert the business based on PCM to IP, and vice versa.

Among Fig. 7, the functional structure of AGW has been described.Because the signaling between AGW and the MSC is followed the signaling and the interface of standard, so the use of MSC without limits.AGW preferably realizes with computer such as nt server.The performance of AGW and the configuration of server and used LAN (IP storehouse throughput, Ethernet etc.) are relevant.Yet a logic AGW can think one group of server.The voice service number of channel of being supported changes with the variation of configuration.For example, connect, need the configuration of two servers, therefore produce about 120 Traffic Channels in order to support a multiplexing E1.

The function of AGW comprises the great majority in the following function at least:

Signaling conversion and termination: A-interface-WIO

Professional Route Selection: Ater Interface-WIO

The management of Ater/A-interface channel

TRAU (becoming sign indicating number and Rate Adapter Unit) frame is handled

IP DTX (discontinuousness voice on the IP)

Code converter (TCSM2E) control

To WIO operation and management (O﹠amp; M) support

Produce the statistics of professional and load

Cluster is selected (with server cluster possibility together).

Signaling between all WIO parts is preferably encrypted, and this also relates to realization O﹠amp; Communicating by letter between the unit of M and the AGW.AGW generally collects the statistical information of especially detected mistake of its main affairs and interference.The state of other WIO network element is constantly controlled in unit, the WIO outpost of the tax office (will be explained below), and therefore, AGW also responds to those inquiries.So MSC interrupts ongoing WIO and calls out.Just in case the WIO network is connected with fault, also temporary close MSC signaling link of AGW so.

Second unit of network operator's one side is ISDN, IP gateway (IGW), communicating by letter between this gateway management WIO and the public telephone network, it be one usually by the gateway of CTI concept definition.Preferably adopt a digital signalling system (DSS.1).In 8, the functional structure of IGW has been described.IGW has one to MSC and PSTN interface.From the MSC angle, IGW just looks as if a PBX.G.711 and G.723 and G.711 and the change sign indicating number between the GSM 06.10 IGW supports the ITU-T standard.IGW collects the statistical information of especially detected mistake of its main affairs and interference, and by the WIO outpost of the tax office (will be explained below) this information is forwarded to O﹠amp; During M uses.The structure of IGW based on the similar hardware of AGW.

The 3rd unit of network operator's one side is in-house network location register ILR, and it is responsible for the directory enquiry service among the WIO.GSM provides an attaching position register (HLR), this is the register of all customer parameters of a permanent storage mobile subscriber, with one or more visitor location registers (VLR), all customer parameters that temporary transient stored calls is set up in this register are as long as the user is in the lane place that this register is controlled.For these registers, normally those of skill in the art are known for the main conditions of relevant this technology.

In-house network location register (ILR) is a database being responsible for permanent storage of subscriber data among the WIO, and on the other hand, it be one among the visit HLR user data and the inlet hypervisor of charge system.The purposes of ILR provides a thesaurus, is used to be retrieved as the customizing messages of the travelling carriage (MS) that the WIO system disposed.In this database, all configurations all have a fixing inlet for the customizing messages of the MS of WIO.The specific setting of these MS has only when MS signs in in the WIO system effective.

Moreover, in office's one side, the conversion of the current address of each MS in the WIO scope in the WIO outpost of the tax office (will describe in detail in the back) modification numbering directory.ILR is connected with VLR with HLR by the MAP interface.At HLR, the main task of ILR is the professional brief information of retrieval user from HLR, and for example supplementary service is provided with etc.ILR for example relates to the Windows nt server based on industrial standard Pentium technology.In order to finish its task well, this server will provide high practicability, fault-tolerant and fast quick-recovery.

Among Fig. 6, understand about the storage of the information of mobile user that ILR managed and the realization of search function in more detail.Interface shown in should be noted that is applicable to present embodiment, but does not get rid of the equivalent implementation that comprises more or less interface.The ILR interface is realized storage and the search function about the information of mobile user that ILR managed.It is transparent to the WIO outpost of the tax office that this function makes the database that relates to details, and therefore, the variation that is arranged in following storage means does not require that the WIO outpost of the tax office does any variation.ILR provides the Code And Decode of the request that the WIO outpost of the tax office proposed, and returns WIO outpost of the tax office institute information requested.

The HLR interface is used for from HLR retrieval mobile subscriber's essential information and supplementary service setting thereof.MS outpost of the tax office location address is stored among the ILR, and the position renewal is retrieved.From the shift position update request at the WIO outpost of the tax office trigger event as the HLR information retrieval.

The VLR interface is used to ask user's IMSI (international mobile subscriber identifier), if relevant with TMSI (Temporary Mobile Subscriber Identifier) at the primary importance reproducting periods travelling carriage for the WIO district.In both cases, all to adopt MAP.

Ldap interface provides a kind of device, is used for retrieval and keeps the MS customizing messages, and this information stores is in the directory enquiry service database that is connected with ILR.Collect the various information source of this information from resembling HLR interface and IN interface.With the agreement that is adopted during directory enquiry service is communicated by letter is light Directory Access Protocol (LDAP).

The IN interface is an optional interface, and it provides a kind of device, is used for the supplementary service information from the intelligent network retrieval user, for example feasible special-purpose numbering that can use the short code in the WIO.This interface is for example based on service management interface (SMI) that IN provided.

Billing interface provides a kind of device, is used for the relevant initial data of chargeing is sent to charge system, so that carry out reprocessing.In this execution mode, local data base ILR is as the intermediate store of the collected charge information in WIO outpost of the tax office.

In office's one side of WIO, network element in-house network mobile cluster IMC and WIO outpost of the tax office GK are as shown in Figure 5.As previously described, in term H.323, in-house network mobile cluster (IMC) comes down to a gateway, and the effect of its simulation BSC in the WIO environment.IMC utilize based on LAPD Q.931 with the specific signaling of GSM, and be the trau frame of Abis interface generation voice-and-data.It goes back managing radio resources and channel configuration, and the configuration of management BTS.IMC provides GSM signaling and rheology to change to other WIO parts.During calling out, it also detects the needs of possible handover and power control action.

At WIO, IMC Core Feature shown in the functional layer among Fig. 9 comprises: operation has the CVOPS of GSM signaling protocol, control of operation WIO system and IP encrypt, and control is at the jack interface at the WIO outpost of the tax office and control jack interface at GSM/IP business option on the LAPD server.At BTS, the major function of IMC is:

BTS control and management

Radio Resource control and management

Wireless network control and management

Wireless channel configuration and management

·IP?DTX

RF hopping

Handoff algorithm and Target cell statistical tables and reports are accused

Handoff management

Form from IP operation to G.703 speech conversion with to the trau frame of Abis end

The IMC condition managing

Wireless target condition managing

IMC and wireless access error management

Status report forms.

IMC is realized as a kind of unit of controlled in wireless usually, and it is for example based on the Pentium with E1 interface card ^PC.

In fact IMC comprises three functional units as shown in Figure 11.Wireless access part 111 comprises a wireless receiver 112 and transmitter unit 113, E1 interface 141.Data processing unit 116 is generally realized with computer; For example based on Pentium ^The NT computer.DPU116 also comprises three functional units: radio resource managing unit 117, operation and maintenance unit 118 and communication unit 119.WIO interface unit 120 is a LAN interface card of supporting several physical connections preferably.

Second unit shown in office's one side is the WIO outpost of the tax office among Fig. 5.The outpost of the tax office generally is a unit that is used to provide professional (for example calling transfer re-routes the detailed department record keeping in selection and the IP network automatically).The task at the WIO outpost of the tax office also comprises to the WIO end points in the WIO system provides the control business of calling out.

The task at the outpost of the tax office comprises the great majority in the following task at least:

Address translation feature

Bandwidth Management

Call manager

The activity management

Send paging request (will be explained below) to IMC

Check the service profile and the mandate of WIO business

Collect Call Data Record (CDR)

Call Data Record is forwarded to ILR

Be O﹠amp; M is provided by the supporting interface that provides

Check the function of other WIO parts

Be responsible for endpoint registration and State Control.

In these tasks, some is well-known for those of skill in the art, and some will here be elaborated.The outpost of the tax office comprises some functional units and interface as shown in Figure 10.

The State Control and the endpoint registration of other WIO entities is responsible in equipment control 101.Device manager stores the WIO customizing messages in the device databases 102 into.

Operation and maintenance 103 comprises an optional WIO outpost of the tax office billing function, and it collects the information of calling out, and therefrom forms the station message recording (CDR) and will the station message recording send to ILR.

Call manager 104 can be defined as starting and controlling one group of function of the telecommunications between two or more users.In the present invention program, call manager provides the basic structure of certain scale, and is that new higher level service produces an open-ended platform.Call manager is wanted can support such as the information with IP address and the mutual conversion of telephone number.The WIO outpost of the tax office can be used to manage different type of call (as speech, data, fax, SMS and Conference Calling).These callings can be in following foundation between the two: travelling carriage, the network terminal and landline telephone.As long as do not have gateway between PBX and the WIO foundation structure, just can by MSC foundation fix and mobile phone between calling.

External call is called out but also is managed at the outpost of the tax office not only managing internal.Internal call be meant in the same WIO outpost of the tax office, send or the user in two of an office different WIO outposts of the tax office between the calling of sending.External call is meant that two users do not insert the calling of intraoffice network.

Management position district, the WIO outpost of the tax office.When the user in the office was called out by external network, this calling was sent to this quilt by IGW or AGW and exhales the travelling carriage present located WIO outpost of the tax office.IGW or AGW be the inquiring position data from ILR.Then, the WIO outpost of the tax office sends to broadcast paging messages each IMC in the district of its control, and calling sent to real IMC.

In another case, two users are in the zone at the same outpost of the tax office.So, if the WIO outpost of the tax office detects the party B-subscriber in the same WIO outpost of the tax office, then paging broadcast message is sent to each IMC in this outpost of the tax office.The IMC that has registered this user sends to the WIO outpost of the tax office with replying of it, so the outpost of the tax office sends to this IMC with calling.

User in office is calling out under the situation of the user outside the office, the position of WIO barrier inspection user B.If it does not find user B, the WIO outpost of the tax office sends to mobile services switching centre MSC by AGW with calling so.

Activity management 105 comprises and user's activity related task, upgrades and handover as the position.Whenever a new user who inserts intraoffice network arrives this office environment, just carry out the position and upgrade.In addition, preferably also allow other users (for example visitor) to carry out the position in WIO and upgrade, but, their calling is sent out by MSC.The network operator preferably disposes this function, so that can allow external user also to use the base station that is connected with WIO.In WIO, from ILR, receive user profile.

Handoff request message sends to the WIO outpost of the tax office by IMC.This message comprises the best target cell catalogue.The handover that carries out in conventional GSM net also carries out in WIO.Yet a kind of exception is the handover of non-WIO sub-district from WIO to the outside.If call is the calling that inner non-MSC controls, so this situation is impossible.If call is the calling of MSC control, this means the party A-subscriber so in office, and the party B-subscriber is outside office, therefore handover is feasible in this case.This exception has been stipulated Rate Plan, and intra-office is called out (cheap rate even free), and this Rate Plan is different.This is good, and no matter when caller or called mobile station move to outside office's area of coverage, all can make device control the implementation of this specific rate.

The statistical information of all affairs of preferably collecting in WIO to be carried out in the outpost of the tax office (be the calling of speech and data call, fax, SMS, failure, or the like).Utilize this information to charge if desired, then with this information stores in file, be sent among the ILR then.Billing interface among the ILR is collected about " Call Data Record " information (CDR), and this information is sent in the charge system.

Should be noted that function between the IMC and the WIO outpost of the tax office execution mode shown in distribute being fit to here.By changing function or these functions differently being assigned among in these two unit one or in these two unit, can realize the application of equivalence.

As mentioned above, in fact relevant with WIO interface comprises some standard interfaces.Among Figure 12, the interface of present embodiment has been described.At MSC, WIO has two interfaces.Realize with IGW and another is realized with AGW for one.By the 2nd layer (LAPD) and the 3rd layer of (Q.931) protocol service are provided, IGW meets the requirement of DSS.1 standard.The MSC interface meets a plurality of standards, resembles E1,2048Mbit/s (based on G.703 and G.704), LAPD (Q.921), and Q.931 and Q.932 the 3rd layer of employing standard.At PBX and PSTN, IGW also adopts D " " .1 standard in addition.At travelling carriage, adopt honeybee standard such as GSM.At HLR and VLR, ILR realizes the MAP interface.WIO adopts at the outpost of the tax office H.323 agreement, so that communicate by letter with other WIO entities as follows:

By the RAS channel PC terminal and WIO registers entities are arrived the WIO outpost of the tax office

During call setup, use Q.931 channel

During calling out, capacity, encoding and decoding and multiple spot are called out control and are adopted H.245

WIO adopts based on the signaling mode of the routed of standard H.323.All signalings between the WIO outpost of the tax office and other WIO unit are preferably all encrypted.

In the WIO unit of this execution mode, support with lower interface:

LAN interface

The Windows socket

The RTP/RTCP of control speech packet transmission in the UDP datagram

Among Figure 13, the method for the selective call route in the system of the present invention has been described.As an example, show in the office environment and call out relevant step with mobile originating end from WIO user.In step 131, IMC receives the setup requests from the number that contains user B of user A.This request is sent to the WIO outpost of the tax office, and the WIO outpost of the tax office checks according to ILR (step 132) whether user B is WIO user's (step 133).If user B is WIO user, its all IMC (step 134) of being controlled of WIO outpost of the tax office paging so, and check whether it receives and reply (step 135).Do not reply if receive for a certain reason, then cancel this calling (step 136).If IMC couple of BTS that communicates by letter with the MS of user A replys, then the IMC unit by user A and user B connect (step 137).If user B is not WIO user, the WIO outpost of the tax office sends to MSC (step 139) by AGW with calling so, and realizes call setup (step 140) in a usual manner, not only relates to GSM but also relate to H.323 although data transmit.

Although represent and described the present invention, yet, obviously under the situation that does not deviate from the described scope of the invention of back claims, can make amendment to this preferred implementation for those common those of skill in the art according to a kind of preferred implementation.

Claims

1. communication system, this system comprise an internet exchange system (MSC) and

First subsystem (BSS) that comprises one or more base stations (BTS) of communicating by letter with portable terminal (MS) by air interface; With

Second subsystem that comprises one or more base stations (BTS) of communicating by letter with portable terminal (MS) by air interface (WIO, BTS), described second subsystem (WIO BTS) can allow first group of mobile subscriber of communication system insert, and comprise:

One or more first network element (AGW; IGW), be used in the future the conversion of signals of automatic network switching system (MSC) and be second subsystem (WIO, packet BTS) and be used for from second subsystem (WIO, packet BTS) is converted to the signal of internet exchange system (MSC),

One or more and the second subsystem (WIO, BTS) second network element (IMC) that one or more base stations (BTS) connect, being used for will be from the second subsystem (WIO, the conversion of signals of base station BTS) (BTS) is the second subsystem (WIO, BTS) packet and being used for from the second subsystem (WIO, BTS) packet is converted to second subsystem (WIO, the signal of base station BTS) (BTS);

The device (IP, LAN), be used for according to be assigned to second subsystem (WIO, second subsystem (WIO, BTS) packet in are transmitted in the network address of first and second network element BTS); With

(ILR GK), is used for when mobile subscriber's portable terminal can (WIO, the FH-number transform that will identify the mobile subscriber in the communication system during base station BTS) (BTS) communication be second subsystem (WIO, network address BTS) with second subsystem device.

2. communication system as claimed in claim 1, the wherein said second subsystem (WIO, BTS) comprise device (GK, ILR), be used for the second subsystem (WIO, BTS) Route Selection is carried out in the calling between first group the user in, as (WIO, each of network address BTS) identifies the response of mobile subscriber's number described in communication system to being transformed to second subsystem.

3. communication system as claimed in claim 1, the wherein said second subsystem (WIO, BTS) comprise the user register (ILR) of the user position information that is used to store first group, described positional information comprises the data about the network address of the network element that is connected with the current base station that can communicate by letter with it of user's portable terminal.

4. communication system as claimed in claim 1, (WIO, BTS) (IP LAN) comprises the IP protocol network to the described device of the packet in wherein to be used to transmit second subsystem.

5. communication system as claimed in claim 4 is characterized in that, first group of mobile subscriber comprises the employee of the office that inserts described IP protocol network.

6. communication system as claimed in claim 1, (WIO, BTS) (IP LAN) supports H.323 standard to the described device of the packet in wherein to be used to transmit second subsystem.

7. communication system as claimed in claim 2, wherein be used for the second subsystem (WIO, BTS) calling between first group the user in carry out Route Selection described device (GK, ILR) be used for local paging from or the calling of the user terminal of first group of incoming call.

8. communication system as claimed in claim 2, described device (the GK that wherein is used for Route Selection, ILR) be used for this calling is sent to internet exchange system (MSC), as to any response in two conditions of discontented foot row: each is with belonging to first group per family, each described user's FH-number transform is second subsystem (WIO, network address BTS) in the sign communication system.

9. a kind of network element (ILR) in the communication system, this system comprise an internet exchange system (MSC) and

Second subsystem that comprises one or more base stations (BTS) of communicating by letter with portable terminal (MS) by air interface (WIO, BTS), described second base station sub-system (WIO BTS) can allow first group of mobile subscriber of communication system insert, and comprise:

The device (IP, LAN), be used for according to be assigned to second subsystem (WIO, second subsystem (WIO, BTS) packet in are transmitted in the network address of first and second network element BTS); And

Described network element (ILR) comprises some interfaces, in order to collect and to store from internet exchange system (MSC) and second subsystem (WIO, first group user's BTS) permanent and variable user information.

10. network element as claimed in claim 9 (ILR), wherein said variable information comprise second subsystem (WIO, the network address of network element BTS) (IMC) that is connected with user's the current base station that can communicate by letter with it of portable terminal (MS) (BTS).

11. network element as claimed in claim 10 (ILR), wherein unit (ILR) is used for collecting at least and storing described user with respect to second subsystem (WIO, the user profile that position BTS) is upgraded during the signaling between base station (BTS) and the portable terminal (MS).

12. network element as claimed in claim 9 (ILR) response is used for sending described user profile from the inquiry of another network element (GK).

13. network element as claimed in claim 9 (ILR), described interface comprise this network element and following MAP interface between one of at least: the attaching position register (HLR) of GSM net, the visitor location register (VLR) of GSM net.

14. a kind of network element (GK) in the communication system, this system comprise a network subsystem (MSC) and

The device (IP, LAN), be used for according to be assigned to second subsystem (WIO, second subsystem (WIO, BTS) packet in are transmitted in the network address of network element BTS); And

Described unit comprises the device of the network address of the network element (IMC) that is used for second subsystem (WIO) that is connected with user's the current base station that can communicate by letter with it of portable terminal (MS) (BTS) from another network element (ILR) inquiry.

15. network element as claimed in claim 14, wherein this network element is used for realizing the H.323 function at the outpost of the tax office.

16. network element as claimed in claim 14 (GK), it is characterized in that device (116), be used for when mobile subscriber's portable terminal can (FH-number transform that will identify the mobile subscriber in the communication system when WIO, BTS) base station communication be the network address of second subsystem (WIO) with second subsystem.

17. network element as claimed in claim 14, it is characterized in that device (116), be used for the second subsystem (WIO, BTS) Route Selection is carried out in the calling between first group the user in, as (WIO, each of network address BTS) identifies the response of mobile subscriber's number described in communication system to being transformed to second subsystem.

18. a kind of method for communicating that is used in the communication system, this system comprise an internet exchange system (MSC) and

Second subsystem that comprises one or more base stations (BTS) of communicating by letter with portable terminal (MS) by air interface (WIO, BTS), described second base station sub-system (WIO BTS) can allow first group of mobile subscriber of communication system insert, and described method comprises:

With the conversion of signals of the base station (BTS) of internet exchange system (MSC) and described second subsystem is the second subsystem (WIO, BTS) packet and being used for the second subsystem (WIO, BTS) packet is converted to the signal of the base station (BTS) of internet exchange system (MSC) and described second subsystem

According to be assigned to second subsystem (WIO, second subsystem (WIO, BTS) packet in are transmitted in the network address of network element BTS); With

When mobile subscriber's portable terminal can (when WIO, BTS) base station communication, be the network address of second subsystem (WIO) with the FH-number transform of the mobile subscriber in the sign communication system with second subsystem.

19. method as claimed in claim 18 also comprises, to the second subsystem (WIO, BTS) Route Selection is carried out in the calling between first group the user in, as (WIO, each of network address BTS) identifies the response of mobile subscriber's number described in communication system to being transformed to second subsystem.