CN1665328A - Dual-mode/multi-mode portable device and intelligent switching method thereof - Google Patents
Dual-mode/multi-mode portable device and intelligent switching method thereof Download PDFInfo
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- CN1665328A CN1665328A CN200510024476.XA CN200510024476A CN1665328A CN 1665328 A CN1665328 A CN 1665328A CN 200510024476 A CN200510024476 A CN 200510024476A CN 1665328 A CN1665328 A CN 1665328A
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Abstract
The invention provides a double-mode/multimode portable device and its intelligent switching method, and the device comprises: voice collecting section, voice playing section, processing unit and the first and second subsystems, mutually independent, where the first subsystem comprises VoW control module, VoW hardware driving module and VoW protocol entity as well as physical bearing entity layer module, able to make an IP telephone call based on WWAN network, and thus implementing a double-mode/multimode portable device with low communication fee and good mobility. And the method includes: using the first subsystem to communicate; as detecting the signal of the first subsystem is lower than the preset threshold or meets the preset switching condition, preparing for switching to the second subsystem; removing the signal of the first subsystem and using the second subsystem to communicate, thus completing the intelligent switching of the voice data in the two modes and implementing the method.
Description
[technical field]
The present invention relates to a kind of dual-mode/multi-mode portable device and intelligent switch method thereof, refer to a kind of dual-mode/multi-mode portable device and intelligent switch method thereof of voice transmission technology of IP based network especially.
[background technology]
At present, the voice transfer of IP based network (Voice over Internet Protocal is called for short VoIP) technology is owing to its cheap price, configuration easily more and more are subjected to telecom operators and enterprise customer's favor.
Along with WLAN (wireless local area network) (Wireless Local Area Network, abbreviation WLAN) development of technology, and along with Wireless Fidelity (wireless fidelity in enterprise and the family, be WiFi) network growing, make voip technology have mobility and become a reality, the user can insert WLAN by express network and converse in the scope that WLAN covers.Like this, based on the voice of WLAN (wireless local area network) utilization (VoIPover WLAN is called for short the VoWLAN technology) because its conversation is convenient, advantage with low cost and developed.Yet the VoWLAN technology can only be confined to use among a small circle, interrupts in case exceed coverage or the WLAN of WLAN, and the voice data transmission function of VoWLAN technology will lose efficacy.Therefore, the VoWLAN technology has the shortcoming of poor mobility.
Disclose a kind of dual-mode mobile phone U.S. Patent Application Publication the 2002/0085516th A1 number, it is when keeping conversation normally to carry out, can between WLAN and wireless wide area network (wireless Wide AreaNetwork is called for short WWAN), realize that automatic seamless switches.Should comprise a WLAN communication section and a WWAN communication section by existing dual-mode mobile phone.WLAN communication section and the wireless connections of WLAN gateway controller, WWAN communication section and the wireless connections of WWAN base transceiver station.The WLAN gateway controller all is connected with a movements control center with the WWAN base transceiver station.Dial in the process of voip phone and other telephone relations in use WLAN communication section, when this mobile phone detects the dtr signal of WLAN, the WLAN communication section is sent calling transfer (Call Transfer) or Conference Calling (ConferenceCall) request by mobile main dispatching centre to the WLAN gateway controller, this conversation will be switched to the WWAN communication section, use the WWAN communication section to converse.When WWAN communication section and other telephone relations are called out and used to this existing dual-mode mobile phone, in case the user enters in the coverage of WLAN, dual-mode mobile phone sends the request of calling transfer to WLAN, the WLAN communication section is accepted this conversation by checking and WLAN gateway controller, the conversation of WWAN communication section is removed, and uses the WLAN communication section to set up new conversation.When the WLAN signal strength signal intensity is more weak, this existing dual-mode mobile phone will be conversed automatically and switch to the WWAN communication section from the WLAN communication section; When can utilizing WLAN when entering the coverage of WLAN, converses this existing dual-mode mobile phone, thereby reduce the communication cost, should can keep impregnable the realization simultaneously of conversation to automatically switch by existing dual-mode mobile phone like this, in WLAN and WWAN, all can converse, have mobility preferably, can utilize WLAN to reduce the conversation cost simultaneously.
Yet, well-known, higher based on the cost of the phone call of WWAN, therefore should still have the higher shortcoming of cost of the phone call by existing dual-mode mobile phone.
Therefore, be necessary to provide a kind of dual-mode/multi-mode portable device and intelligent switch method thereof to solve the existing in prior technology defective.
[summary of the invention]
The object of the present invention is to provide a kind of dual-mode/multi-mode portable device, it has the cheap and good advantage of mobility of communication fee concurrently.
The object of the present invention is to provide a kind of intelligent switch method of realizing simple, flexible, practical dual-mode/multi-mode portable device.
For achieving the above object, the present invention adopts following technical scheme: dual-mode/multi-mode portable device of the present invention includes: a voice collection unit, one speech play portion, first subsystem and second subsystem of one processing unit and two work independently of one another, first subsystem and second subsystem are controlled by described processing unit all, switch one of them subsystem work by described processing unit intelligence, first subsystem comprises voice collection unit control module, speech play portion control module, the audio coding decoding control module, protocol stack module, use the control module of (VoWLAN) based on the voice of WLAN (wireless local area network), WLAN Hardware drive module and WLAN protocol entity and physical carrier physical layer module, second subsystem comprise voice collection unit control module, speech play portion control module, the audio coding decoding control module, protocol stack module, use the control module of (VoW) based on the voice of wireless wide area network, VoW Hardware drive module and VoW protocol entity and physical carrier physical layer module.
Compared to prior art, second subsystem of dual-mode/multi-mode portable device of the present invention is owing to have control module, VoW Hardware drive module and VoW protocol entity and the physical carrier physical layer module of VoW, thereby can use the voip technology calling IP phone at the WWAN network, thereby realize the dual-mode/multi-mode portable device that a kind of communication fee is cheap and mobility is good.
For achieving the above object, the present invention adopts following technical scheme: the intelligent switch method of dual-mode/multi-mode portable device of the present invention includes: use first subsystem and the conversation of conversation opposite end; When the signal that detects first subsystem is lower than predetermined threshold value or satisfies predefined switching condition, perform the preparation that switches to second subsystem; Processing unit is removed the signal of first subsystem, and makes second subsystem and the conversation of conversation opposite end.
Compared to prior art, the intelligent switch method of dual-mode/multi-mode portable device of the present invention combines at first subsystem and second subsystem and the dual-mode/multi-mode portable device that forms, the intelligent switch method of audio data stream under these two kinds of use patterns is provided, thereby realize that a kind of communication fee is low, mobility is good, and can increase the intelligent switch method of the dual-mode/multi-mode portable device of the coverage of network and network capacity.
[description of drawings]
Fig. 1 is the hardware structure schematic diagram of dual-mode/multi-mode portable device of the present invention.
Fig. 2 is the configuration diagram that intelligence of the present invention is switched software.
Fig. 3 is the schematic flow sheet of first kind of execution mode of the intelligent switch method of dual-mode/multi-mode portable device of the present invention.
Fig. 4 is the schematic flow sheet of second kind of execution mode of the intelligent switch method of dual-mode/multi-mode portable device of the present invention.
Fig. 5 is the schematic flow sheet of the third execution mode of the intelligent switch method of dual-mode/multi-mode portable device of the present invention.
[embodiment]
Please refer to shown in Figure 1ly, the dual-mode/multi-mode portable device of preferred embodiment of the present invention can be the portable radio device that mobile phone, personal digital assistant etc. have voice, data-transformation facility.Dual-mode/multi-mode portable device mainly comprises a voice collection unit 1, a speech play portion 2, a processing unit 5 (as MCU, DSP etc.), by first subsystem 3 of these processing unit 5 controls and second subsystem 4 and by other peripheral hardwares 6 of processing unit 5 controls.In the present embodiment, voice collection unit 1 is a microphone, and speech play portion 2 is loud speakers.First subsystem 3 is based on voice utilization (the VoIP over WirelessLocal Area Network of WLAN (wireless local area network), be called for short VoWLAN) subsystem, it comprises WLAN (wireless local area network) media interviews control (Wireless Local Area Network Media Access Controal is called for short WLAN MAC) baseband processor 30, WLAN radio frequency 31 and WLAN antenna system 32.Second subsystem 4 is based on voice utilization (the VoIP over Wireless Wide Area Network of wireless wide area network, be called for short VoW) subsystem, wireless wide area network comprises global system for mobile communications (Global System for Mobilecommunication, be called for short GSM), use GPRS (the GeneralPacket Radio Service of existing gsm system, be called for short GPRS), Enhanced GPRS (EnhancedGeneral Packet Radio Service, be called for short EGRPS) and GSM evolution technology (the Enhanced Data Rate for GSM Evolution that improves data rate, be called for short EDGE) etc. communication system, in the present embodiment, second subsystem is based on the voice utilization of GSM/GPRS system, and it comprises GPRS/EGRPS baseband processor 40, GPRS/EGPRS radio frequency 41 and GPRS/EGPRS antenna system 42.The voice utilization of the other system that certain second subsystem can be WWAN.
The voice Internet protocol of first subsystem 3 (Voice over Internet Protocal, abbreviation VoIP) voice flow path is shown in the four-headed arrow line A among Fig. 1, voice signal is gathered through voice collection unit 1, carry out D/A switch via GPRS/EGPRS baseband processor 40, carry out the IP package by processing unit 5 controls then, afterwards by WLAN MAC baseband processor 30, signal is sent by WLAN radio frequency 31 and WLAN antenna system 32.On the contrary, signal can reach speech play portion 2 along opposite path after being received by WLAN antenna system 32.The VoIP voice flow path of second subsystem 4 is shown in four-headed arrow line B among Fig. 1, voice signal is collected through voice collection unit 1, carry out D/A switch via GPRS/EGPRS baseband processor 40, carry out the IP package by processing unit 5 controls then, afterwards once more by GPRS/EGPRS baseband processor 40, signal is sent by GPRS/EGPRS radio frequency 41 and GPRS/EGPRS antenna system 42.On the contrary, signal can reach speech play portion 2 along opposite path after being received by GPRS/EGPRS antenna system 42.
In the present embodiment, dual-mode/multi-mode portable device of the present invention makes full use of GPRS/EGPRS baseband processor 40, make its VoIP voice flow carry out D/A switch, do not need to add in addition the D/A of first subsystem, 3 special uses first subsystem 3 and second subsystem 4.Certainly, dual-mode/multi-mode portable device of the present invention can additionally be provided with a D/A (not shown), is used for the VoIP voice flow of first subsystem 3 is carried out D/A switch.
Please refer to shown in Figure 2ly, the intelligence of dual-mode/multi-mode portable device of the present invention is switched software and is mainly comprised: the exclusive module of the exclusive module of first subsystem 3, second subsystem 4 and the sharing module of first, second subsystem 3,4.The exclusive module of first subsystem 3 comprises: VoWLAN control module, WLAN hardware drive program and WLAN protocol stack entity and physical carrier physical layer.The exclusive module of second subsystem 4 comprises: VoW control module, VoW hardware drive program and VoW protocol stack entity and physical carrier physical layer.VoW control module and VoWLAN control module constitute the VoIP control module of dual-mode/multi-mode portable device of the present invention.The sharing module of first, second subsystem 3,4 comprises: voice collection unit control module, speech play portion control module, audio coding/decoding module, transmission control protocol (Transmission ControlProtocol, be called for short TCP)/IP stack, session initiation protocol (Session InitiationProtocal, be called for short SIP)/RTP (Real-time Transport Protocal, be called for short RTP)/RTCP Real-time Transport Control Protocol (Real-time Transport Control Protocal is called for short RTCP) protocol stack.On software configuration, the dual-mode/multi-mode portable device of preferred embodiment of the present invention adopts the method for sharing protocol stack, shares protocol stacks such as TCP/IP and SIP/RTP/RTCP, makes to use simply, expand flexibly.Certainly, first, second subsystem of dual-mode/multi-mode portable device of the present invention can use special-purpose separately TCP/IP, SIP/RTP/RTCP protocol stack way of realization.
In first subsystem 3, ICP/IP protocol stack entities or example and VoWLAN protocol stack entity are bound, and bind with WLAN physical carrier entity thus.SIP/RTP/RTCP protocol stack entity or example then are established on ICP/IP protocol stack entities or the example, and the call signaling of first subsystem 3 and RTP voice flow see through above protocol stack and transmit.
In second subsystem 4, ICP/IP protocol stack entities or example and VoW protocol stack entity are bound, and bind with VoW physical carrier entity thus.SIP/RTP/RTCP protocol stack entity or example then are established on ICP/IP protocol stack entities or the example, and the call signaling of second subsystem 4 and RTP voice flow see through above protocol stack and transmit.
Coupling between each protocol stack entity and binding method are looked different operating system and hardware platform and difference to some extent.
First subsystem of dual-mode/multi-mode portable device of the present invention is except that can using the voip technology conversation on WLAN, can also utilize WLAN transmission data, second subsystem is except that can carrying out the VoIP conversation on WWAN, can also use other transmission technologys to carry out voice, transfer of data based on WWAN, for example use time division multiplexing (Time-Division Multiplexing is called for short TDM) technology to carry out voice data transmission at gsm system.
When dual-mode/multi-mode portable device of the present invention and another VoIP terminal need be conversed, at first finish Signalling exchange by SIP, after connecting, the media communication process is then finished jointly by RTP and RTCP.
The audio data stream of coming from two subsystems 3,4 all is fed to audio coding/decoding module and voice collection unit, speech play portion control module, the VoIP control module selects one the tunnel to handle and play to speech play portion 2 according to switching state, the data of coming by voice collection unit 1 then by this VoIP control module according to current switching state with data feed-in one of them or two subsystems 3,4.
According to setting, dual-mode/multi-mode portable device of the present invention has four kinds of modes of selecting networks, is respectively: VoWLAN only; VoWLAN is preferential; VoW is preferential; VoW only.For only VoWLAN and only this dual mode of VoW, when signal weakening arrived certain threshold value, system did not attempt switching.And VoWLAN is preferential and VoW preferentially this dual mode at signal weakening to threshold value or when satisfying predefined switching condition, to do switch operating automatically, just attempt another mode of operation, preferential for VoWLAN, trial is switched to VoW, and preferential for VoW, trial is switched to VoWLAN.
Below be preferably the intelligent handoff procedure that example illustrates the intelligent switch method of dual-mode/multi-mode portable device with VoWLAN.
Please refer to shown in Figure 3, when dual-mode/multi-mode portable device when called, the intelligent switch method of dual-mode/multi-mode portable device of the present invention becomes two different terminals with first subsystem 3 of dual-mode/multi-mode portable device with second subsystem, 4 hypothesis, use the method for calling transfer (Call Transfer), making two " terminals " as calling transfer---the first subsystem 3 and the second subsystem 4---call alternately, thereby finish the course of work of the intelligent switch method of dual-mode/multi-mode portable device of the present invention.
In dual-mode/multi-mode portable device of the present invention and another VoIP terminal (being called for short the conversation opposite end) communication process, first subsystem 3 is wherein detecting the Wireless Fidelity of WLAN (wireless fidelity, be WiFi) under signal is lower than after the predetermined threshold value or certain predefined switching condition is satisfied the situation, will carry out switching to second subsystem 4 and keeping the handoff procedure of conversation simultaneously from first subsystem, 3 intelligence.
Idiographic flow is as follows:
(1) first subsystem 3 of dual-mode/multi-mode portable device of the present invention and the conversation of conversation opposite end;
(2) under the situation that the WiFi signal strength signal intensity is lower than after certain preset threshold value or certain predefined switching condition is satisfied, and perform the preparation that switches to second subsystem 4;
(3) processing unit 5 notifies second subsystem 4 to perform the preparation that call accepted is shifted;
(4) first subsystems 3 notice conversation opposite ends, request call transfer is to second subsystem 4;
(5) agreement of conversation opposite end is called out and is transferred to second subsystem 4, and replys first subsystem 3;
Voice flow is removed in (6) first subsystems 3 and conversation opposite end;
(7) the conversation opposite end is called out according to the needs of first subsystem 3 and is transferred to second subsystem 4;
4 call accepteds of (8) second subsystems are shifted, and reply the conversation opposite end;
(9) first subsystem 3 is notified in the conversation opposite end, and calling transfer completes successfully;
(10) second subsystems 4 are set up voice communication with the conversation opposite end, continue conversation.
Wherein, step (9) and step (10) can merge, voice communication is directly set up with second subsystem 4 in the opposite end of just conversing, and calling transfer completes successfully information and can directly notify first subsystem 3 by second subsystem 4, to shorten the time that rebulids of voice channel.
Please refer to Fig. 4, when dual-mode/multi-mode portable device of the present invention the time as caller, in the process of conversing in its first subsystem 3 and conversation opposite end, since the WiFi signal weakening to certain predetermined threshold value or certain predefined switching condition be satisfied, second kind of execution mode of the intelligent switch method of dual-mode/multi-mode portable device of the present invention uses the method for Conference Calling (Conference Call) to switch to second subsystem 4 by following handoff procedure intelligence:
(1) first subsystem 3 is conversed with the conversation opposite end;
(2) under the situation that the WiFi signal is lower than after certain threshold value or certain predefined switching condition is satisfied, processing unit 5 decision intelligence switch to second subsystem 4;
The new call flow based on sip request message is initiated in 4 pairs of conversations of (3) second subsystems opposite end;
(4) second subsystems 4 detect conversation opposite end ring-back tone;
(5) processing unit 5 indication first subsystem 3 original conversation of dismantling;
(6) new phone is answered in the conversation opposite end;
(7) conversation is switched on second subsystem 4 intelligently, and second subsystem 4 is set up conversation with the conversation opposite end.
Please refer to Fig. 5, in the 3rd embodiment of the intelligent switch method of dual-mode/multi-mode portable device of the present invention, realize the course of work that intelligence is switched by the method for calling out (re-calling) or call park (call park) again, its basic principle is when detecting first subsystem 3 or second subsystem 4 and reach switching threshold or satisfy certain predefined switching condition, by allowing the subsystem that is in non-talking state initiate a new calling to the conversation opposite end, the original voice flow of when call signalling flow finishes, dismantling, replace new voice flow, thereby realize the intelligence switching, its handoff procedure is as follows:
It is mutual that call signaling is finished in (1) first subsystem 3 and conversation opposite end, and (for example: the voip network system configuration) obtain a call number again from call server, this number is as the unique identification of this calling, and accepted by the call server and first subsystem;
(2) voice flow is established, the conversation beginning;
(3) detect the WLAN signal weakening, be low to moderate a certain threshold value, perhaps satisfy certain predefined switching condition, prepare to initiate to switch;
(4) first subsystems 3 are told call server, the temporary suspension session;
(5) first subsystems 3 are suspended with the voice flow of conversation opposite end;
(6) second subsystems 4 usefulness are call number request call server replay call again again;
(7) second subsystems 4 are established with the conversation of conversation opposite end, converse by successful switch to second subsystem 4.
When the existing telephone network is not supported to call out again automatically or during call park, for example in voip network system based on SIP, when dual-mode/multi-mode portable device of the present invention is called, adopt first kind of execution mode of the intelligent switch method of dual-mode/multi-mode portable device of the present invention to realize the intelligence switching; When the dual-mode/multi-mode portable device caller, adopt second kind of execution mode of the intelligent switch method of dual-mode/multi-mode portable device of the present invention to realize the intelligence switching.Again call out automatically or during call park when existing voip network support, only adopt the third execution mode can realize that the intelligence of dual-mode/multi-mode portable device under called and caller situation switches.
More than three kinds of execution modes all be preferably the intelligent handoff procedure that example illustrates the intelligent switch method of dual-mode/multi-mode portable device with VoWLAN, the VoW mode of priority is not similarly done other explanation at this.
Dual-mode/multi-mode portable device of the present invention and intelligent switch method thereof utilize existing WLAN and GSM/ (E) GPRS network can finish the switch operating of dual-mode/multi-mode, and existing network is supported without any need for additional, so have good practicability.Certainly, the intelligence that dual-mode/multi-mode portable device of the present invention and intelligent switch method thereof also go between other pattern subsystem is switched, and existing network is supported without any need for additional equally.
Like this, dual-mode/multi-mode portable device of the present invention and intelligent switch method thereof the seamless switching of can conversing in WLAN and GSM/ (E) GPRS network is for the integrated application of VoIP in GPRS/EGPRS and WLAN provides good application model.In the scope that WLAN covers, carry out express network with first subsystem and insert and converse, then converse when the WLAN signal is more weak or when not having WLAN and covering by second subsystem access GSM/ (E) GPRS network.In communication process,, can realize between two kinds of network application environments that the network of intelligence switches according to the power of signal.Therefore, the means that dual-mode/multi-mode portable device of the present invention and intelligent switch method thereof can utilize the multiple network access way to converse, network coverage and network capacity have been increased, effectively reduce communication fee and guarantee that dual-mode/multi-mode portable device has good mobility, dual-mode/multi-mode portable device of the present invention and intelligent switch method thereof are realized simple, flexible, practical simultaneously.
Claims (21)
1. dual-mode/multi-mode portable device, include: a voice collection unit, one speech play portion, first subsystem and second subsystem of one processing unit and two work independently of one another, first subsystem and second subsystem are controlled by described processing unit all, switch one of them subsystem work by described processing unit intelligence, first subsystem comprises voice collection unit control module, speech play portion control module, the audio coding decoding control module, protocol stack module, use the control module of (VoWLAN) based on the voice of WLAN (wireless local area network), WLAN Hardware drive module and WLAN protocol entity and physical carrier physical layer module, second subsystem comprise voice collection unit control module, speech play portion control module, the audio coding decoding control module, protocol stack module, it is characterized in that: second subsystem also comprises the control module based on the voice utilizations (VoW) of wireless wide area network, VoW Hardware drive module and VoW protocol entity and physical carrier physical layer module.
2. dual-mode/multi-mode portable device as claimed in claim 1 is characterized in that: first subsystem is based on the subsystem that wireless local uses VoIP on the net.
3. dual-mode/multi-mode portable device as claimed in claim 2 is characterized in that: first subsystem comprises WLAN (wireless local area network) media interviews control baseband processor, WLAN RF portion and antenna system.
4. dual-mode/multi-mode portable device as claimed in claim 1 is characterized in that: second subsystem is the subsystem that can use VoIP at wireless wide-area on the net.
5. dual-mode/multi-mode portable device as claimed in claim 4, it is characterized in that: second subsystem is can be on gsm system or at GPRS (General Packet RadioService, be called for short GPRS) and the last subsystem that uses VoIP of Enhanced GPRS (Enhanced General PacketRadio Service, abbreviation EGRPS).
6. dual-mode/multi-mode portable device as claimed in claim 5 is characterized in that: second subsystem comprises and is used for the signal of first, second subsystem is carried out the GPRS/EGRPS baseband processor of D/A switch.
7. dual-mode/multi-mode portable device as claimed in claim 1 has four kinds of modes of selecting networks: preferential, second subsystem of first subsystem, first subsystem second subsystem preferentially and only only.
8. dual-mode/multi-mode portable device as claimed in claim 1, it is characterized in that: first subsystem and second subsystem are shared described protocol stack module, the protocol stack module that should share comprises and meets transmission control protocol/IP stack, session initiation protocol (Session Initiation Protocal, be called for short SIP)/RTP (Real-time Transport Protocal, be called for short RTP)/module of RTCP Real-time Transport Control Protocol (Real-time Transport Control Protocal is called for short RTCP) protocol stack.
9. the intelligent switch method of a dual-mode/multi-mode portable device includes:
(1) make dual-mode/multi-mode portable device use first subsystem and the conversation of conversation opposite end;
When (2) signal that detects first subsystem is lower than predetermined threshold value or satisfies predefined switching condition, perform the preparation that switches to second subsystem;
(3) remove the voice signal of first subsystem, and make dual-mode/multi-mode portable device use second subsystem and the conversation of conversation opposite end.
10. the intelligent switch method of dual-mode/multi-mode portable device as claimed in claim 9 is characterized in that: use the mode of calling transfer to finish the intelligence switching.
11. the intelligent switch method of dual-mode/multi-mode portable device as claimed in claim 9 is characterized in that: when dual-mode/multi-mode portable device is called out, use the mode of calling transfer to make second subsystem and the conversation of conversation opposite end.
12. the intelligent switch method as claim 10 or 11 described dual-mode/multi-mode portable devices is characterized in that: (2) step comprises that also the processing unit of dual-mode/multi-mode portable device notifies second subsystem to perform the preparation of calling transfer.
13. the intelligent switch method of dual-mode/multi-mode portable device as claimed in claim 12 is characterized in that: first subsystem notice conversation opposite end, request call transfer is to second subsystem; The agreement of conversation opposite end is called out and is transferred to second subsystem, and replys first subsystem.
14. the intelligent switch method of dual-mode/multi-mode portable device as claimed in claim 13 is characterized in that: the conversation opposite end is called out according to the needs of first subsystem and is transferred to second subsystem; The second subsystem call accepted is shifted, and replys the conversation opposite end.
15. the intelligent switch method of dual-mode/multi-mode portable device as claimed in claim 14 is characterized in that: notify first subsystem, calling transfer completes successfully; Second subsystem and the conversation of conversation opposite end.
16. the intelligent switch method of dual-mode/multi-mode portable device as claimed in claim 9 is characterized in that: dual-mode/multi-mode portable device is during as caller, and second subsystem is initiated new call flow based on the session initiation protocol request message to the conversation opposite end.
17. the intelligent switch method of dual-mode/multi-mode portable device as claimed in claim 16 is characterized in that: second subsystem detects conversation opposite end ring-back tone, and new phone is answered in the conversation opposite end, and conversation is switched on second subsystem by intelligence.
18. the intelligent switch method of dual-mode/multi-mode portable device as claimed in claim 9 is by calling out again or the mode of call park realizes that intelligence switches.
19. the intelligent switch method of dual-mode/multi-mode portable device as claimed in claim 18, it is characterized in that: before (1) step, first subsystem obtains a call number again from filesystem server, this number is as the unique identification of this calling, and accepted by the call network system server and first subsystem.
20. the intelligent switch method of dual-mode/multi-mode portable device as claimed in claim 19, it is characterized in that: second subsystem is used again call number request call server replay call again, the conversation of second subsystem and opposite end is established, and conversation is switched to second subsystem.
21. the intelligent switch method of dual-mode/multi-mode portable device as claimed in claim 9 is characterized in that: first, second subsystem can be based on the subsystem that wireless local uses the subsystem of VoIP on the net or uses VoIP at wireless wide-area on the net.
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| US20030134650A1 (en) * | 2002-01-17 | 2003-07-17 | Rangamani Sundar | Method, system and apparatus for internetworking a mobile station to operate in a WWAN environment and in a WLAN environment with PBX services |
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2005
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