CN100456745C

CN100456745C - Global microwave insertion interoperating system and method for realizing real-time roaming service

Info

Publication number: CN100456745C
Application number: CNB2006100993240A
Authority: CN
Inventors: 喻建华
Original assignee: Huawei Technologies Co Ltd
Current assignee: Changzhou Xiaoguo Information Service Co., Ltd.
Priority date: 2006-07-17
Filing date: 2006-07-17
Publication date: 2009-01-28
Anticipated expiration: 2026-07-17
Also published as: WO2008011825A1; CN1889522A

Abstract

A WiMAX network system is prepared as connecting external network switched in with mobile table to radio access device in mobile table external network and fixed interchange device in fixed communication network for finalizing conversion function of signaling message and address, connecting said fixed interchange device to fixed access device in fixed communication network for setting up connection between mobile tables through fixed communication network. The method for realizing real time and roaming service in WiMAX network is also disclosed.

Description

World Interoperability for Microwave Access, WiMax system and realization are real-time, the methods of services of roaming

Technical field

The present invention relates to the BRAN technology, particularly a kind of World Interoperability for Microwave Access, WiMax system and realization are real-time, the methods of services of roaming.

Background technology

BWA has characteristics such as availability of frequency spectrum height, radiation is little, cost is low, so wireless access wide band technology is thought the one preferred technique of next generation wireless communication by industry.

WiMAX (World Interoperability for Microwave Access, WiMax) is a kind of broadband wireless access agreement, is used to guarantee compatibility and interoperability between the different broadband wireless access equipment.The WiMAX network has two kinds of networking modes: the independent networking of WiMAX network or merge networking with existing network.Prospect is relatively arranged at present, and to study morely be the second way.

Fig. 1 is a typical WiMAX network in the prior art.Referring to Fig. 1, the independent network's mode of this network using, and adopt mobile IP protocol (MIP) that roaming service is provided.

MIP is a kind of network layer mobility management protocol, it has introduced home agent (HA), two new functional entitys of Foreign Agent (FA) and tunneling technique, under the prerequisite that does not change Internet (internet) routing rule, the routing issue when having solved the mobile node roaming.

Network as shown in Figure 1 mainly is made of travelling carriage (MS), access service network (ASN), connectivity serving network (CSN) and Internet.Wherein, ASN is made of base station (ASN-BS) and Access Service Network Gateway (ASN-GW), provides 802.16 physical layer and MAC layer function, the double simultaneously FA that does the MIP agreement; Two ASN are arranged in this network: the roaming network at MS provides the Internet access service of roaming place to MS; Another provides the Internet access service of ownership place at the home network of MS.MS supports IP/MIP agreement and 802.16 agreements, and by 802.16 air interface access base stations, the base station links to each other with ASN-GW by local area network (LAN).

The operation principle of above-mentioned network is: MS obtains home address (HoA) from HA, when MS when foreign agent FA 1 roams into foreign agent FA 2, obtain Care-of Address (CoA) from FA2, and register to HA with this CoA, thereby HoA and the CoA of binding MS, between HA and FA or HA and MS, set up the tunnel, MIP registration process that Here it is.When MS sends data, directly send as default router with nonlocal CSN; And since all mail to the IP packet of MS must be through the firewall filtering of MS home network, so MS receive data will through three wings by: ownership CSN receives the packet that mails to MS, and hand to nonlocal CSN or ASN, and then hand to MS by this other places CSN or ASN by the MIP tunnel.

As seen from the above analysis, there is following problem in existing network:

1, networking mode aspect does not make full use of the existing fixed communication network resource, thereby causes network construction cost height, difficulty big

Because the WiMAX network coverage is little, make it to set up separately the wide area overlay network as GSM (global system for mobile communications), therefore, need merge networking with existing network, particularly merge networking with the existing fixed communication network resource, with reduction network construction cost and difficulty, and prior art does not make full use of the existing fixed communication network resource.

2, professional ability aspect can not provide real time business well

Though the rise of the Internet makes the IP data service constantly increase, but it is the first that the proportion that traditional speech business occupies in communication service still occupy, therefore, high-quality real time business need be provided, particularly ip voice service, and above-mentioned network obviously can not guarantee the service quality (QoS) of real time business.Though have in the prior art by the IP private network is set, promptly between the CSN of the CSN of field network and home network, set up ip voice (VoIP) special line, obtain to have the voip network system of carrier class QoS, need drop into bigger construction fund and operating cost but build the VoIP special line.

3, roaming service aspect can only realize by three wing origin

Shared network can not be roamed by the user by a plurality of telecom operators, and the WiMAX network coverage is smaller, rely on three wings can not guarantee in limited coverage, to provide the QoS of real time business to the less demanding data service of real-time by the roaming service that realizes.

Summary of the invention

In view of this, main purpose of the present invention is, proposes a kind of WiMAX network system, to make full use of the existing fixed communication network resource, reaches the purpose that reduces network construction cost and difficulty.

For achieving the above object, the invention provides a kind of WiMAX network system, comprise the radio reception device in the travelling carriage field network, this system also comprises:

Fixedly access device in the fixed communication network, be in the field network that travelling carriage inserts, link to each other with radio reception device in the described travelling carriage field network and the fixedly switching equipment in the fixed communication network, be used to finish the function of signaling message conversion and address transition;

Fixedly switching equipment in the fixed communication network links to each other with described fixedly access device, is used for setting up being connected between travelling carriage and the travelling carriage by fixed communication network;

Described radio reception device is isolated real time business from user data, the call signaling of described real time business is inserted described fixedly switching equipment by described fixedly access device, handle by fixed communication network again, and the voice packet of described real time business inserted described fixedly switching equipment by described fixedly access device, handle by fixed communication network again; Or

Described radio reception device separates the data service of roaming mobile stations with real time business, the data service of described roaming mobile stations by three wings of mobile IP by providing, the real time business of described roaming mobile stations inserts described fixedly switching equipment by described radio reception device by described fixedly access device, transmits by fixed communication network again.

Wherein, the radio reception device in the described field network links to each other with fixing access device, and can insert described fixedly switching equipment by the V5.2 interface.

Preferably, described fixedly access device can comprise the protocol conversion adaptation module, described protocol conversion adaptation module can be used for the mutual conversion of V5.2 protocol message and WiMAX protocol message, and the mutual conversion of mobile identification number and wired access layer 3 address.

Further, described protocol conversion adaptation module can be used for the pulse code modulation PCM voice of ip voice bag and 64kbit/s are changed mutually, and will be H.323 or Session initiation protocol SIP message and V5.2 protocol message change mutually.

Further, described fixedly switching equipment can be used to safeguard the travelling carriage Care-of Address and the fixing mapping table of access device number;

Described fixedly switching equipment can be further used for according to the travelling carriage Care-of Address, obtains the fixedly access device number of the current institute of travelling carriage access network from described mapping table.

Further, described fixedly switching equipment can be used for by wired access layer 3 address identification travelling carriage, and the calling original record of same travelling carriage is merged charging.

Further, described fixedly switching equipment can be used to cooperate authentication charging aaa server, and user's voice and data service binding are chargeed.

Wherein, described fixed communication network comprises common exchanging telephone network PSTN or public land mobile network PLMN.

Second main purpose of the present invention is, a kind of method that realizes real time business in the WiMAX network is provided, and reaches the purpose of the ip voice service that carrier class QoS is provided in the WiMAX network.

For achieving the above object, the invention provides a kind of method that in the WiMAX network system, realizes real time business, set in advance by radio reception device to fixing access device again to the fixing passage of switching equipment, this method may further comprise the steps:

A, described radio reception device are isolated real time business from user data;

B, described radio reception device insert described fixedly switching equipment with the call signaling of described real time business by described fixedly access device, handle by fixed communication network again;

C, described radio reception device insert described fixedly switching equipment with the voice packet of described real time business by described fixedly access device, handle by fixed communication network again.

Wherein, described step B can may further comprise the steps:

B1, described radio reception device are sent to described fixedly access device with described call signaling, and described fixedly access device is sent to described fixedly switching equipment with described call signaling;

B2, described fixedly switching equipment by described fixed communication network, are sent to the fixedly access device of the current institute of called mobile station access network with described call signaling;

B3, described fixedly access device receive described call signal, and send beep-page message to called mobile station;

B4, called mobile station send page response to described fixedly access device, and send call signal to the radio reception device of current institute access network.

Wherein, described step C can may further comprise the steps:

C1. described radio reception device is sent to described fixedly access device with described voice packet;

C2. described fixedly access device is reduced into the pulse code modulation PCM voice of 64kbit/s with the payload in the described voice packet, and is sent to described fixedly switching equipment;

C3. described fixedly switching equipment is sent to the opposite end travelling carriage by described fixed communication network with described voice.

Preferably, in described fixedly switching equipment or described radio reception device, safeguard the travelling carriage Care-of Address and the fixing mapping table of access device number;

Can comprise before the described step B2: fixedly switching equipment is according to described travelling carriage Care-of Address, the fixedly access device of the current institute of acquisition called mobile station access network number from described mapping table.

Wherein, described fixedly access device can further provide the function of charging, the method for its charging can for: by wired access layer 3 address identification travelling carriage, and the calling original record of same travelling carriage merged realizing charge.

Wherein, described fixedly access device can further cooperate with authentication charging aaa server, and user's voice and data service binding are chargeed.

The 3rd main purpose of the present invention is, a kind of method that realizes roaming service in the WiMAX network is provided, and realizes roaming in the WiMAX network.

For achieving the above object, the invention provides a kind of method that in the WiMAX network system, realizes services of roaming, set in advance by radio reception device to fixing access device again to the fixing passage of switching equipment, this method may further comprise the steps:

A, described radio reception device separate the data service of roaming mobile stations with real time business;

The data service of b, described roaming mobile stations by three wings of mobile IP by providing, the real time business of described roaming mobile stations inserts described fixedly switching equipment by described radio reception device by described fixedly access device, transmits by fixed communication network again.

As seen from the above technical solution, WiMAX network system of the present invention, passing through radio reception device fixedly, access device inserts fixedly switching equipment, made full use of existing fixed communication network resource, make wireless access operator can share abundant fixed communication network resource, comprise fixedly switching equipment resource, access device resource, transfer resource, Service Source etc., reduced the cost and the difficulty of networking.

And, by on original WiMAX network foundation, setting by radio reception device to fixing access device again to the fixing passage of switching equipment, from user data, isolate real time business by radio reception device, and described real time business inserted described fixedly switching equipment by described fixedly access device, handle by fixed communication network again, thereby in the WiMAX network, realized real time business; And, because this passage adopts circuit switching to realize voice transfer, thereby the QoS with high-quality, the purpose that provides the carrier class ip voice to serve in broadband radio access network has been provided.

In addition, by utilizing on the WiMAX network foundation that MIP realizes roaming original, setting by radio reception device to fixing access device again to the fixing passage of switching equipment, the data service and the real time business that separate roaming mobile stations by radio reception device, and the real time business of described roaming mobile stations inserted described fixedly switching equipment by described fixedly access device, transmit by fixed communication network again, thereby, for real time business provides a kind of new roaming mode, realized that data service and real time business roam respectively; And expanded coverage by internetwork roaming, remedied 802.16 deficiencies aspect covering, made the operator can carry out service rapidly.

Description of drawings

Fig. 1 is the schematic network structure of the independent networking of WiMAX network in the prior art.

Fig. 2 is the structural representation of WiMAX network system of the present invention.

Fig. 3 network system shown in Figure 2 for the present invention adopts realizes the signaling process schematic flow sheet of ip voice business.

Fig. 4 network system shown in Figure 2 for the present invention adopts realizes the ascending voice processing procedure schematic diagram of ip voice business.

Fig. 5 network system shown in Figure 2 for the present invention adopts realizes the downlink voice processing procedure schematic diagram of ip voice business.

Embodiment

For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is further elaborated below in conjunction with drawings and the specific embodiments.

Main thought of the present invention is that the radio reception device in the WiMAX network is inserted fixedly switching equipment by the fixedly access device in the fixed communication network, thereby make full use of the resource of existing fixed communication network, to reduce network construction cost and difficulty, and in BRAN, provide VoIP service, and then expand the coverage of WiMAX network by internetwork roaming with carrier class QoS.

Below with the radio reception device CSN in the WiMAX network, and the fixedly switching equipment LE in the fixed communication network, fixedly access device AN is an example, and the embodiment of technical solution of the present invention is described.

Fig. 2 is the structural representation of WiMAX network system of the present invention.This system has increased fixed communication network equipment in existing WiMAX network---LE and AN.Referring to Fig. 2, this WiMAX network system comprises: LE201, field network AN202, local network AN203, field network CSN204, field network ASN-GW205, field network base station 206, home network CSN207, home network ASN-GW208, home network base station 209 and home network router two 10.

Wherein, local switch LE201 communicates by letter with each AN, is used for setting up being connected between travelling carriage and the travelling carriage by fixed communication network;

The fixed communication network here can comprise PSTN (PSTN) or PLMN Circuit Switching Networks such as (public land mobile networks).

Field network AN202 links to each other with home network CSN207 with field network CSN204 respectively with local network AN203, and pass through the V5.2 interface each CSN is inserted LE201, be used between each CSN and LE, finishing the function of signaling message conversion, address transition and media conversion.

Field network CSN204 communicates by letter with home network ASN-GW208 with field network ASN-GW205 respectively with home network CSN207, and insert LE201 by field network AN202 and home network AN203 with the V5.2 interface respectively, be used to separate the voice-and-data business, and the user's voice business is sent to AN;

In addition, in this system, home network CSN207 can be used to realize the function of HA, and field network ASN-GW205 and home network ASN-GW208 can be used to realize the function of FA.

This network system has increased by one and has inserted the passage of LE by CSN by AN on the basis of original WiMAX network, and the annexation of other parts and prior art network system shown in Figure 1 remain unchanged.

The AN of WiMAX network system of the present invention comprises the protocol conversion adaptation module, and this protocol conversion adaptation module is used to realize the mutual conversion of WiMAX procotol message to the fixed communication network protocol message.Particularly, this protocol conversion adaptation module comprises following function:

1) signaling message conversion

The WiMAX message related to calls that will come from CSN converts the V5.2 protocol message to and is sent to LE; The V5.2 protocol message that will come from LE converts the WiMAX message related to calls to and is sent to CSN;

To come from CSN H.323 or the Session Initiation Protocol message conversion become the V5.2 protocol message to be sent to LE; The V5.2 protocol message that will come from LE converts to H.323 or Session Initiation Protocol message is sent to CSN.

2) address transition

Convert the mobile identification number of MS to the wired access of AN layer 3 address (L3 Address); The wired access L3 of AN address transition is become the mobile identification number of MS.

3) media conversion

The IP bag that will come from CSN converts 64kbit/s PCM (pulse code modulation) voice to and passes to LE; The 64kbit/s PCM speech conversion that will come from LE becomes the IP bag to be sent to CSN.

LE in the WiMAX network system of the present invention can register according to MIP, obtains that MS is current to be inserted AN number.The implementation method of this function is:

In LE, safeguard CoA and AN number mapping table, perhaps in HA, safeguard CoA and AN number mapping table;

After MS arrives new field network, to the new CoA of HA registration;

HA revises the corresponding relation of CoA in CoA and the AN mapping table and AN number, and perhaps HA hands to LE with this location update message, the corresponding relation of CoA and AN number in LE modification CoA and the AN mapping table;

LE can search CoA and AN mapping table according to CoA, draws the current AN that inserts of MS number.

And LE can pass through L3 Address Recognition MS, and the charge information of same MS can be merged.Charging process is: before and after the roaming, MS inserts LE by different AN; LE discerns MS by the location update message of L3 address and MS, and it is called out original record (CDR) merging, thereby realizes chargeing.In addition, LE can also cooperate aaa server, and data service and the speech business binding of this MS are chargeed.

It more than is explanation to WiMAX network architecture of the present invention, in this network system, CSN inserts LE by the AN in the fixed communication network, made full use of existing fixed communication network resource, make wireless access operator can share abundant fixed communication network resource, reduced the cost and the difficulty of networking.

With reference to the accompanying drawings, to realizing that based on above-mentioned network system the method for real time business describes.Real time business in the communication comprises ip voice business, IP visual telephone business etc., is that example describes with the ip voice business below.

In network system shown in Figure 2, still three wings by MIP are by providing for roaming MS user's data business, and the ip voice business is " the voice access designated lane " processing by being made up of CSN, AN and LE then.

Adopt network system shown in Figure 2 that the method for ip voice business is provided, comprise signaling process process and speech processes process.Fig. 3 network system shown in Figure 2 for the present invention adopts realizes the signaling process schematic flow sheet of ip voice business.Referring to Fig. 3, this flow process comprises caller process and called process,

Wherein, caller process may further comprise the steps:

Step 311:MS user storage dialing information and off-hook are set up wireless connections with ASN, and ASN is that MS distributes radio channel resource.

Step 312:MS user obtains the IP Connection Service through ASN from CSN, and CSN is that MS distributes the ground transfer resource.

Step 313:CSN calls out to the AN initiation session;

In this step, CSN can pass through H.323 or the SIP call signaling is called out to the AN initiation session.

Step 314:AN converts this call signaling to V5.2 off-hook (ESTABLISH) message, is sent to LE.

Step 315:LE distributes the time slot passage on the switch, after being allocated successfully, arrives ASN by AN again to CSN, sends dialing tone (DIAL TONE) to MS, and expression can be dialled.

The dialing information that step 316:MS will store in advance arrives AN by ASN again to CSN, issues LE;

In this step, dialing information is good with Dual Tone Multifrequency, because DTMF information can transmit by speech channel; And if dialing information is a digital signal, then this dialing information also need convert audio signal to and just can send to LE in AN.

Step 317:LE checks numbers and analyzes, and selects route that this call signal is sent to PSTN or PLMN, and finally is sent to the called subscriber.

Step 318: called subscriber's ring, LE sends out ring-back tone (ALERTING) to MS, and this ring-back tone arrives ASN through AN to CSN by voice channel again, arrives MS at last.

Step 319: called subscriber's off-hook, LE sends out connection message (CONNECT) to MS, so far, sets up conversation and connects.

Called process may further comprise the steps:

Step 321: the MS of customer call this locality, a distant place, HA is sent to LE with beep-page message; After the time slot passage success on the LE distribution switch, execution in step 322.

Step 322:LE draws the current AN that inserts of MS number according to the CoA of MS registration, and paging signal is sent to AN;

Can in LE, safeguard the mapping table of CoA and AN number, also can in HA, safeguard the mapping table of CoA and AN number.So, LE just can draw the current AN that inserts of MS number according to this mapping table.

Step 323:AN sends out beep-page message (PAGING) to MS.

Step 324:MS sends out page response (PAGING ACK) to AN.

Step 325:MS and ASN set up wireless connections, and ASN is that MS distributes radio channel resource.

Step 326:MS obtains the IP Connection Service through ASN from CSN, and CSN is that MS distributes the ground transfer resource.

Step 327:AN will convert V5.2 ring (ALERTING) message to from the page response signaling (PAGING ACK) that MS receives, and send to LE, and the called MS ring.

Step 328: called MS user's off-hook, send out connection message (CONNECT) by AN to LE, set up conversation and connect.

So far, the signaling process process finishes, and has set up the connection between caller MS and the called MS.Below the present invention is realized that the speech processes process of ip voice business describes.

Fig. 4 is that the present invention adopts network system shown in Figure 2, realizes the ascending voice processing procedure schematic diagram of ip voice business.Referring to Fig. 4, this process may further comprise the steps:

Step 401:ASN sends to CSN with user data package;

In this step, MS is with user data package (comprising HoA and user's data), by 802.16 access base stations; The base station is finished the convergence sub-layer (CS) of user data and is handled, and the internal data path (DP) that IP is wrapped by ASN sends to ASN-GW then; ASN-GW adds generic route encapsulation (GRE) with the IP bag, becomes the CoAIP bag, sends to CSN.

Step 402:CSN is reduced to the IP bag with the CoAIP bag, and therefrom isolates voice packet;

Voice, data and the signaling aloft physical layer of interface are transmitted among being placed on different channels respectively, still, and when arriving the terrestrial transmission circuit of CSN through ASN, be blended in the same transmission lines and transmit, for example, in the present embodiment, transmit by unified being encapsulated in the IP bag of LAN;

ASN and CSN have the ability of from the IP bag logic channel being reduced, for example, and by the mode of physical separation, be IP address of data service disposable plates configuration, for the speech business disposable plates disposes another IP address, like this, voice-and-data just is easy to separately;

And the method for CSN separation voice, data and signaling is to distinguish according to the different of wireless channel, for example, MS is when sending voice or data, just be automatically assigned to dissimilar physical channels, when the base station receives, also, directly just voice-and-data is differentiated according to different wireless channel type.

After step 403:AN solves the payload in the IP bag, be reduced into the PCM voice of 64kbit/s, be put on the time slot passage of E1,, pass to LE by the V5.2 agreement.

Step 404:LE is sent to circuit-switched networks such as PSTN, PLMN with the PCM voice of 64kbit/s, and finally arrives the other side MS.

So far, the ascending voice processing procedure finishes.It is the inverse process that ascending voice is handled that downlink voice is handled, and below the downlink voice processing procedure is described.Fig. 5 is that the present invention adopts network system shown in Figure 2, realizes the downlink voice processing procedure schematic diagram of ip voice business.Referring to Fig. 5, this process may further comprise the steps:

Step 501:LE receives the PCM voice of the 64kbit/s that issues Home Network MS from circuit-switched networks such as PSTN, PLMN.

Step 502:LE is put into these voice on the time slot passage of E1, sends AN to by the V5.2 agreement.

Step 503:AN becomes the ip voice bag with the PCM speech conversion of 64kbit/s, sends to CSN.

Step 504:CSN sends to ASN with user data;

ASN-GW wraps decapsulation with CoA IP, and sends to the base station by the internal data path (DP) of ASN; The base station sends the data to MS by 802.16.

So far, the downlink voice processing procedure finishes.

In addition, when the user shuts down, can initiatively send out Detach; But during the deviated from network overlay area, can initiatively not send out Detach, will cause paging failure like this.In this programme,, during as 3 times, notify LE that this MS is deleted from paging domain by ASN-GW, to raise the efficiency when paging failure surpasses certain number of times continuously.

It more than is explanation to the specific implementation method that the invention provides the ip voice business, this method is by on original WiMAX network foundation, setting by CSN to AN again to the passage of LE, and by CSN with speech business after separating from user data, be sent to this passage and handle, in the WiMAX network, realized the ip voice business; And, because this passage adopts circuit switching to realize voice transfer, thereby the QoS with high-quality, the purpose that provides the carrier class ip voice to serve in broadband radio access network has been provided.

In addition, in the above-described embodiments, roaming MS user's data business still three wings by MIP by providing, the user's voice business is then by the CSN after separating, being sent to the passage of being made up of CSN, AN and LE handles, so, for speech business provides a kind of new roaming mode, realized that data service and real time business roam respectively; And expanded coverage by internetwork roaming, remedied 802.16 deficiencies aspect covering, made the operator can carry out service rapidly.

The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.All any modifications of being done within the spirit and principles in the present invention, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims

1, a kind of World Interoperability for Microwave Access, WiMax WiMAX network system comprises the radio reception device in the travelling carriage field network, it is characterized in that this system also comprises:

2, network system according to claim 1 is characterized in that, the radio reception device in the described field network links to each other with fixing access device, and inserts described fixedly switching equipment by the V5.2 interface.

3, network system according to claim 2, it is characterized in that, described fixedly access device comprises the protocol conversion adaptation module, described protocol conversion adaptation module is used for the mutual conversion of V5.2 protocol message and WiMAX protocol message, and the mutual conversion of mobile identification number and wired access layer 3 address.

4, network system according to claim 3, it is characterized in that, described protocol conversion adaptation module is further used for the pulse code modulation PCM voice of ip voice bag and 64kbit/s are changed mutually, and will be H.323 or Session initiation protocol SIP message and V5.2 protocol message change mutually.

5, network system according to claim 1 is characterized in that, described fixedly switching equipment is further used for safeguarding the travelling carriage Care-of Address and the fixing mapping table of access device number;

Described fixedly switching equipment is further used for according to the travelling carriage Care-of Address, obtains the fixedly access device number of the current institute of travelling carriage access network from described mapping table.

6, network system according to claim 1 is characterized in that, described fixedly switching equipment is further used for by wired access layer 3 address identification travelling carriage, and the calling original record of same travelling carriage is merged charging.

7, network system according to claim 1 is characterized in that, described fixedly switching equipment is further used for cooperating authentication charging aaa server, and user's voice and data service binding are chargeed.

8, network system according to claim 1 is characterized in that, described fixed communication network comprises common exchanging telephone network PSTN or public land mobile network PLMN.

9, a kind of method that realizes real time business in World Interoperability for Microwave Access, WiMax WiMAX network system is characterized in that, sets in advance by radio reception device to fixing access device again to the fixing passage of switching equipment, and this method may further comprise the steps:

10, method according to claim 9 is characterized in that, described step B may further comprise the steps:

11, method according to claim 9 is characterized in that, described step C may further comprise the steps:

12, method according to claim 10 is characterized in that, safeguards the travelling carriage Care-of Address and the fixing mapping table of access device number in described fixedly switching equipment or described radio reception device;

Comprise before the described step B2: fixedly switching equipment is according to described travelling carriage Care-of Address, the fixedly access device of the current institute of acquisition called mobile station access network number from described mapping table.

13, according to claim 10 or 11 described methods, it is characterized in that, described fixedly access device further provides the function of charging, and the method for its charging is: discern travelling carriage by wired access layer 3 address, and the calling original record of same travelling carriage is merged to realize charging.

14, method according to claim 13 is characterized in that, described fixedly access device further cooperates with authentication charging aaa server, and user's voice and data service binding are chargeed.

15, a kind of method that realizes services of roaming in World Interoperability for Microwave Access, WiMax WiMAX network system is characterized in that, sets in advance by radio reception device to fixing access device again to the fixing passage of switching equipment, and this method may further comprise the steps: