CN1708156A - Mobile communication terminal for supporting double-frequency voip and voip selecting method thereof - Google Patents
Mobile communication terminal for supporting double-frequency voip and voip selecting method thereof Download PDFInfo
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- CN1708156A CN1708156A CNA2004100955911A CN200410095591A CN1708156A CN 1708156 A CN1708156 A CN 1708156A CN A2004100955911 A CNA2004100955911 A CN A2004100955911A CN 200410095591 A CN200410095591 A CN 200410095591A CN 1708156 A CN1708156 A CN 1708156A
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- voip
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W92/00—Interfaces specially adapted for wireless communication networks
- H04W92/04—Interfaces between hierarchically different network devices
- H04W92/10—Interfaces between hierarchically different network devices between terminal device and access point, i.e. wireless air interface
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- Engineering & Computer Science (AREA)
- Quality & Reliability (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Telephonic Communication Services (AREA)
Abstract
The invention provides a mobile communication terminal for supporting double-frequency voip and voip selecting method thereof comprising the following departments: a main processing department which takes in charge of the total control of the terminal and the CDMA call processing as well as the resource management etc.; a codec transforming department which transform the codec of the wireless LAN to the CDMA LAN; a VOIP signal processing department which generates and analyzes the SIP and SDP signal received and sent with opposite side by network; a voice processing department which processes the voice data packet received and sent by the VOIP calling; a signal selection department which selects the signal fitting for the communication environment in the signal of the wireless LAN or the CDMA LAN; a wireless LAN processing department which processes the signal of the wireless LAN to the established signal and sends or receives the signal of the wireless LAN; a CDMA processing department which processes the signal of the CDMA LAN to the established signal and sends or receives the communication signal of the CDMA LAN.
Description
Technical field
The present invention relates to internet voice transfer protocol (VOIP) technology, it is particularly related to combining of VOIP and mobile communication terminal; Be a kind of mobile communication terminal and VOIP system of selection thereof of supporting double-frequency voip concretely.
Background technology
At present, the technology-VOIP of transmission voice develops towards three directions in the Internet.
First be based on be able in the wired internet commercialization H.323, the VOIP device on the wired lan (local area network (LAN)) of Session Initiation Protocol, second is based on the Wireless VOIP device of just realizing standardized wireless lan interfaces at present, the 3rd, development along with mobile radio communication, the bandwidth of network support increases, and has also occurred the VOIP technology of employing wireless data, services in mobile radio communication.
Above-mentioned VOIP device is owing to the operational environment difference, so also different in the technology of each self-supporting of network terminal, in addition, because hardware or differences such as wireless protocols, standard coder, a terminal can only obtain to be fit to the VOIP service of a network.
Now,, also do not have a kind of terminal in general the Internet and mobile communication (CDMA) net, all to use VOIP, just can in a net, use though there are many people to attempt combining wireless local area network (LAN) and mobile communication.The mobile communication base station method of a kind of installation access point (Access Point) proposed in addition, so that can provide WLAN service and mobile communication (CDMA) service.
Wherein, the Wireless VOIP terminal of working under radio local network environment is revised, and in the VOIP of wired network terminal installation, has only the Physical LAN interface partly to use the wave point of supporting the 2.4GHz frequency band.Identical with cable environment, the VOIP agreement is used SIP (Session Initiation Protocol) and H.323 more.
The formation of the network that is used to use above-mentioned WLAN (wireless local area network) that the VOIP call service is provided as shown in Figure 1.
Basically, WLAN terminal device 1 and WLAN terminal device 2 only have moving the same AP (the Access Point) 3 in base station that communicates by letter of image drift and could communicate by letter with AP4.
Be useful on APM (Access PointManagement) device 5 and the server 10 that is used for to terminal distribution IP address or support proof and keep accounts (Billing) of management above-mentioned AP (Access Point) 3 and AP4 in addition.
In order under the radio local network environment of above-mentioned Fig. 1, to carry out the VOIP service, use the VOIP agreement that is equipped on WLAN terminal device 1 and WLAN terminal device 2.
VOIP call treatment step is identical with the VOIP device of cable environment, dial if the user picks up a receiver, then terminal automatically and AP (Access Point) 3 and AP4 communicate, and carry out the VOIP protocol step simultaneously, thereby can carry out voice call.
At this moment, in order only in mobile communication (CDMA) net, to support VOIP, terminal does not have anything additionally to add at hardware aspect, but aspect software, need add speech processing module, be used to change with the VOIP agreement and receive the voice signal of transmission, make it to meet the mobile communication coder with packet.
Fig. 2 is the concise and to the point basic block diagram that is used for carrying out at the cdma mobile communication net network of VOIP service.In mobile radio communication, VOIP server 23 is undertaken effects such as resource management and user management, calling relaying, VOIP call treatment step with in the CDMA net, use the step of data, services identical.
Promptly, 18 beginnings of portable terminal 17 and portable terminal are connected with the PDSN21 of responsible data, services through BSC20 with after BTS19 communicates by letter, so, the VOIP server 23 of above-mentioned PDSN21 and responsible VOIP user registration communicates, and the PDSN27 under relative users sends the signal of telecommunication simultaneously.
So, transmit call setup message through callee BSC25, BTS26 to portable terminal 27, after having set up necessary environment, open voice speech channel and converse.
The VOIP terminal installation that in wired internet or WLAN (wireless local area network) and cdma mobile communication, uses at present, the technology that they are supported has nothing in common with each other, differences such as the standard coder of each hardware or wireless protocols, support can only realize a kind of VOIP service in a terminal.
Certainly, the standardization of WLAN (wireless local area network) has recently had many progress, and use also very active, but utilize the VOIP service of WLAN (wireless local area network) still to have limitation, operator is not as present mobile communication, a large amount of AP (Access Point) that undertake with the base station same function are set, so support the regional less of WLAN service.
In addition, with regard to WLAN (wireless local area network), the frequency band that can communicate be 2.4GHz exempt from licensed band (unlicensed band), the electric wave service of multiple modes such as bluetooth (Bluetooth), infrared communication is provided in same frequency band, the possibility that interference takes place is very big, and there are many restrictions in the power of power supply.
In addition, an AP (Access Point) can support that the radius of communicating by letter is less, and, between operator handover etc. support still insufficient, when mobility more for a long time, the situation of dropped calls frequently takes place.
Therefore, the VOIP terminal installation that uses in wired internet or WLAN (wireless local area network) and cdma mobile communication has following characteristics, promptly, be adapted at the area service that mobility such as office or hotel are little, the zone is limited, use the WLAN (wireless local area network) of same wireless interface different owing to frequency band with wireless protocols with CDMA 1X mobile radio communication, each other can't be compatible.
On the contrary, the VOIP technology of mobile radio communication support still is in the introduction stage, and on the characteristic of mobile radio communication, because bandwidth is less, when wireless interconnected network users was more, the voice service quality may descend.
And owing to use mobile radio communication, usage charges are than general telephone or WLAN (wireless local area network) VOIP height.In mobile communication, in order to satisfy needs to WLAN (wireless local area network), though the technology about the equipment that holds WLAN (wireless local area network) in the base station is provided, but aspect base station processing CDMA calling, also there is limitation, promptly, for the situation of supporting WLAN (wireless local area network), because not support resource management and bandwidth, so it is very big normally to carry out the possibility of speech processes, if the work that base station need be handled is too much, base station system will take place unusually, and the situation that the user can't carry out voice call fully may take place.
In addition, though also have mobile communication module and wireless LAN card are installed in PDA, are carried out the situation that mobile communication voice is called out (Voice Call) and WLAN (wireless local area network) data, services, problem is not support the VOIP service.
Summary of the invention
The present invention proposes in order to address the above problem just, purpose is to provide a kind of mobile communication terminal and VOIP system of selection thereof of supporting double-frequency voip, when portable terminal is in when WLAN (wireless local area network) regional has been installed, communicate by WLAN (wireless local area network), if leave the WLAN (wireless local area network) interval, then call out and communicate by mobile radio communication, VOIP.
For realizing as above purpose, feature of the present invention is to comprise following several sections: main handling part, its effect are overall control and CDMA call treatment and the resource managements etc. of being responsible for terminal; The coder converter section, it converts the coder of WLAN (wireless local area network) to the CDMA coder; The VOIP signal processing part, it generates and analyzes Session Initiation Protocol and session description protocol (SDP) signal that receives transmission by network and the other side; Speech processes portion, it is handled by VOIP and calls out the VoP that receives transmission; Signal selecting part, it selects to be fit to the signal of current communication environment in wireless lan signal or cdma mobile communication signal; The WLAN (wireless local area network) handling part, it is processed into acquired signal to the wireless lan signal of above-mentioned signal selecting part output and sends, or receives wireless lan signal; The CDMA handling part, it becomes set signal to the cdma mobile communication signal processing of above-mentioned signal selecting part output and sends, or receives the cdma mobile communication signal.
For realizing as above purpose, another feature of the present invention is to comprise following several steps: if the user selects automatic mode for processing VOIP, then behind the signal that receives wireless local web area and CDMA zone, judge whether the signal that receives is the step of wireless lan signal; If above-mentioned judged result is a wireless lan signal, then be converted to the WLAN service pattern, WLAN (wireless local area network) VOIP is provided service, if not wireless lan signal, judge then whether the signal that receives is the step of cdma mobile communication signal; If above-mentioned judged result is that the signal that receives is not the cdma mobile communication signal, then be converted to standby mode, if the signal that receives is the cdma mobile communication signal, then be converted to CDMA data, services pattern, judge whether then with the VOIP server communication in step; If above-mentioned judged result be with the VOIP server communication in, cdma mobile communication VOIP service then is provided, if not with the VOIP server communication in, the step of CDMA voice call service then is provided.
Effect of the present invention is, the present invention combines the VOIP technology of current widely used wired internet environment with mobile communication technology, in a portable terminal, support simultaneously to call out dual mode, thereby have that mobile communication terminal user can obtain voice service whenever and wherever possible and the effect that need not to bear call rate based on the VOIP of cdma mobile communication net and the VOIP that uses WLAN (wireless local area network).
Description of drawings
Fig. 1 is used to the concise and to the point pie graph of network that uses general WLAN that the VOIP call service is provided;
Fig. 2 is the concise and to the point basic block diagram that is used for carrying out at general cdma mobile communication net the network of VOIP service;
Fig. 3 is the formation block diagram of the present invention's mobile communication terminal of supporting double-frequency voip;
Fig. 4 is the VOIP system of selection action flow chart of the present invention's mobile communication terminal of supporting double-frequency voip;
Fig. 5 is the formation block diagram of VOIP signal processing part shown in Figure 3.
The symbol description of accompanying drawing major part:
38: main handling part 39: coder converter section
40:VOIP signal processing part 41: speech processes portion
42: signal selecting part 43: wireless
Embodiment
With reference to the accompanying drawings, describe the present invention in detail and support the mobile communication terminal of double-frequency voip and the action and the effect of VOIP system of selection thereof.
Fig. 3 is the formation block diagram of the present invention's mobile communication terminal of supporting double-frequency voip.
As shown in Figure 3, the present invention has following several sections: main handling part 38, its effect are overall control and CDMA call treatment and the resource managements etc. of being responsible for terminal; Coder converter section 39, it converts the coder of WLAN (wireless local area network) to the CDMA coder; VOIP signal processing part 40, it generates and analyzes SIP and the SDP signal that receives transmission by network and the other side; Speech processes portion 41, it is handled by VOIP and calls out the VoP that receives transmission; Signal selecting part 42, it selects to be fit to the signal of current communication environment in wireless lan signal or cdma mobile communication signal; WLAN (wireless local area network) handling part 43, it is processed into acquired signal to the wireless lan signal of above-mentioned signal selecting part 42 outputs and sends, or receives wireless lan signal; CDMA handling part 44, it becomes acquired signal to the cdma mobile communication signal processing of above-mentioned signal selecting part 42 outputs and sends, or receives the cdma mobile communication signal.Below with reference to Fig. 4, action of the present invention is described.
Above-mentioned main handling part 38 is built-in arm processors in the MSM chip that generally uses in the CDMA terminal, except that primary processor, also is responsible for the control of peripheral units such as DSP, LCD, microphone, loud speaker, dialing keypad.
At first, the user dials called number, press " conversation " button after, beginning call setup step by VOIP signal processing part 40, directly transmits message with server or with the other side.
At this moment, WLAN (wireless local area network) and mobile radio communication use same protocol more than the IP layer, just the agreement of using in network layer (Network Layer) difference to some extent.
Fig. 5 is the concise and to the point figure of the signal processing of above-mentioned VOIP signal processing part 40.SIP60 is responsible for the call treatment part, and SDP (Session Description Protocol) the 61st is used to be provided with and realizes that the physical medium channel connects the part of required Capability and media characteristic etc.
Above-mentioned two dial data bag utilizations transmission (Transport) agreement sends corresponding network to according to separately Network Layer behind UDP63 and IP64Layer.
When being mobile communication (CDMA), use PPP (Point-to-Point) agreement 65 and RLP (RadioLink Protocol) 66, when being WLAN (wireless local area network), use the MAC agreement 67 of 802.11a, 802.11.b.802.11g definition.
That is to say, above-mentioned VOIP signal processing part 40 the SIP of responsible call treatment with set up the SDP that the physical medium channel is connected and be used as host-host protocol, this host-host protocol is converted to agreement and the output that meets each automatic network by UDP and IP layer.
In addition, when being the cdma mobile communication signal, above-mentioned VOIP signal processing part 40 utilizes ppp protocol and RLP agreement to carry out conversion process, when being wireless lan signal, utilizes the MAC agreement to carry out conversion process.
Promptly, in the above-mentioned main handling part 38 for carrying out voice signal that mobile communication generates according to DSP through above-mentioned coder converter section 39, standard compression mode with WLAN (wireless local area network), promptly G.711, G.729, after G.723.1 one of them change, be transferred to real network according to the respective protocol form by speech processes portion 41.
Wherein, signal selecting part 42 selects to be fit to the signal of current communication environment in wireless lan signal or cdma mobile communication signal, WLAN (wireless local area network) handling part 43 is processed into acquired signal to the wireless lan signal of above-mentioned signal selecting part 42 outputs and sends, or receive wireless lan signal and insert above-mentioned signal selecting part 42, determine the signal of above-mentioned signal selecting part 42 to select with this.
In addition, CDMA handling part 44 becomes acquired signal to the cdma mobile communication signal processing of above-mentioned signal selecting part 42 outputs and sends, or receive the cdma mobile communication signal and insert above-mentioned signal selecting part 42, determine the signal of above-mentioned signal selecting part 42 to select with this.
That is, above-mentioned signal processing part 42 is selected one in CDMA Voice Call, CDMA VOIP service, based on the VOIP of WLAN (wireless local area network) service, is described below with reference to Fig. 4.
At first, if the user selects automatic mode, then be converted to Broadband Detection step 49, antenna receives the signal in wireless local web area and CDMA zone.
Judge whether then to detect wireless lan signal 50,, then enter the WLAN service pattern, use VOIP service 51 and VOIP service 52 if detected wireless lan signal.
If above-mentioned judged result is not detect wireless lan signal, then judge whether to detect cdma mobile communication signal 53,, then current terminal is converted to the connection standby mode if above-mentioned judged result is not detect the cdma mobile communication signal, end operation enters and withdraws from step.
If above-mentioned judged result is to detect the cdma mobile communication signal, then be converted to CDMA data, services pattern 54, then for confirming that whether can carry out CDMA VOIP service communicates 56 with the VOIP server.
If communication is normal, then be converted to CDMA VOIP service state 59, if it is undesired to communicate by letter, then be converted to CDMA Voice Call service mode 57.
Promptly, the present invention combines the VOIP technology of the wired internet environment of current extensive use with mobile communication technology, in a portable terminal, support simultaneously to call out dual mode with the VOIP that uses WLAN (wireless local area network) based on the VOIP of cdma mobile communication net, thereby in the area that the private radio local area network (LAN) has been installed as mansion, office etc., carry out voice call by WLAN (wireless local area network), if leave the WLAN (wireless local area network) interval, then connect VOIP and call out by original mobile radio communication, carry out voice call.
Cited concrete form or embodiment are in order further to clearly state the technology of the present invention content in the detailed description of the invention described above, must not be defined in this specific embodiment and make an explanation, can in claims scope of spirit of the present invention and following record, implement various changes.
Effect of the present invention is, the present invention combines the VOIP technology of current widely used wired internet environment with mobile communication technology, in a portable terminal, support simultaneously to call out dual mode, thereby have that mobile communication terminal user can obtain voice service whenever and wherever possible and the effect that need not to bear call rate based on the VOIP of cdma mobile communication net and the VOIP that uses WLAN (wireless local area network).
Above embodiment only is used to illustrate the present invention, but not is used to limit the present invention.
Claims (8)
1. mobile communication terminal of supporting double-frequency voip is characterized in that comprising following several sections:
Main handling part, its effect are overall control and CDMA call treatment and the resource managements etc. of being responsible for terminal;
The coder converter section, it converts the coder of WLAN (wireless local area network) to the CDMA coder;
The VOIP signal processing part, it generates and analyzes Session initiation Protocol and the session description protocol signal that receives transmission by network and the other side;
Speech processes portion, it is handled by VOIP and calls out the VoP that receives transmission;
Signal selecting part, it selects to be fit to the signal of current communication environment in wireless lan signal or cdma mobile communication signal;
The WLAN (wireless local area network) handling part, it is processed into acquired signal to the wireless lan signal of above-mentioned signal selecting part output and sends, or receives wireless lan signal;
The CDMA handling part, it becomes set signal to the cdma mobile communication signal processing of above-mentioned signal selecting part output and sends, or receives the cdma mobile communication signal.
2. the mobile communication terminal of support double-frequency voip according to claim 1 is characterized in that:
The VOIP signal processing part the Session initiation Protocol of responsible call treatment with set up the session description protocol that the physical medium channel is connected and be used as host-host protocol, this host-host protocol is converted to agreement and the output that meets each automatic network by UDP and IP layer.
3. the mobile communication terminal of support double-frequency voip according to claim 2 is characterized in that:
When being the cdma mobile communication signal, the VOIP signal processing part utilizes ppp protocol and RLP agreement to carry out conversion process.
4. the mobile communication terminal of support double-frequency voip according to claim 2 is characterized in that:
When being wireless lan signal, the VOIP handling part utilizes the MAC agreement to carry out conversion process.
5. VOIP system of selection of supporting the mobile communication terminal of double-frequency voip is characterized in that comprising following several steps:
If the user selects automatic mode for processing VOIP, then behind the signal that receives wireless local web area and CDMA zone, judge whether the signal that receives is the step of wireless lan signal;
If above-mentioned judged result is a wireless lan signal, then be converted to the WLAN service pattern, WLAN (wireless local area network) VOIP is provided service, if not wireless lan signal, judge then whether the signal that receives is the step of cdma mobile communication signal;
If above-mentioned judged result is that the signal that receives is not the cdma mobile communication signal, then be converted to standby mode, if the signal that receives is the cdma mobile communication signal, then be converted to CDMA data, services pattern, judge whether then with the VOIP server communication in step;
If above-mentioned judged result be with the VOIP server communication in, cdma mobile communication VOIP service then is provided, if not with the VOIP server communication in, the step of CDMA voice call service then is provided.
6. the VOIP system of selection of the mobile communication terminal of support double-frequency voip according to claim 5 is characterized in that also comprising the steps:
If the WLAN (wireless local area network) dedicated mode then provides WLAN (wireless local area network) VOIP service after being converted to the WLAN service pattern.
7. the VOIP system of selection of the mobile communication terminal of support double-frequency voip according to claim 5 is characterized in that also comprising the steps:
If the CDMA data communication mode, then after being converted to CDMA data, services pattern, judge whether with the VOIP server communication in step;
If above-mentioned judged result be with the VOIP server communication in, cdma mobile communication VOIP service then is provided, if not with the VOIP server communication in, the step of CDMA voice call service then is provided.
8. the VOIP system of selection of the mobile communication terminal of support double-frequency voip according to claim 5 is characterized in that also comprising the steps:
If not automatic mode and WLAN (wireless local area network) dedicated mode and CDMA data communication mode, then provide CDMA voice call service.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020040042705 | 2004-06-10 | ||
| KR1020040042705A KR100608793B1 (en) | 2004-06-10 | 2004-06-10 | Mobile communication terminal for dual band voip and his voip selection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1708156A true CN1708156A (en) | 2005-12-14 |
| CN100512560C CN100512560C (en) | 2009-07-08 |
Family
ID=35581752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100955911A Expired - Fee Related CN100512560C (en) | 2004-06-10 | 2004-12-02 | Mobile communication terminal for supporting double-frequency voip and voip selecting method thereof |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR100608793B1 (en) |
| CN (1) | CN100512560C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009015518A1 (en) * | 2007-08-02 | 2009-02-05 | Essence Technology Solution, Inc. | A communication method for providing a voip multi-mode telephone in a mobile device |
| CN101291500B (en) * | 2008-05-19 | 2012-02-08 | 德信无线通讯科技（北京）有限公司 | Method and device for user call processing |
| CN102845128A (en) * | 2010-04-28 | 2012-12-26 | 惠普发展公司，有限责任合伙企业 | Techniques to provide integrated voice service management |
| CN103152784A (en) * | 2013-03-15 | 2013-06-12 | 优视科技有限公司 | Communication method, communication device and communication system |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100595531B1 (en) * | 2004-11-15 | 2006-07-03 | 엘지전자 주식회사 | Method for preventing automatic connection in personal digital assistant |
| KR100738554B1 (en) | 2006-01-26 | 2007-07-11 | 삼성전자주식회사 | Apparatus and method for call processing in dual mode terminal |
| US8786664B2 (en) | 2010-04-28 | 2014-07-22 | Qualcomm Incorporated | System and method for providing integrated video communication applications on a mobile computing device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7460525B2 (en) | 2001-07-06 | 2008-12-02 | General Instrument Corporation | Methods, apparatus, and systems for accessing mobile and voice over IP telephone networks with a mobile handset |
| KR200264583Y1 (en) | 2001-11-16 | 2002-02-19 | 신정훈 | Portable wireless communication device |
| KR20040020253A (en) * | 2002-08-30 | 2004-03-09 | 엘지전자 주식회사 | A device and a methode thereof for wireless lan mobile phone |
-
2004
- 2004-06-10 KR KR1020040042705A patent/KR100608793B1/en not_active IP Right Cessation
- 2004-12-02 CN CNB2004100955911A patent/CN100512560C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009015518A1 (en) * | 2007-08-02 | 2009-02-05 | Essence Technology Solution, Inc. | A communication method for providing a voip multi-mode telephone in a mobile device |
| CN101291500B (en) * | 2008-05-19 | 2012-02-08 | 德信无线通讯科技（北京）有限公司 | Method and device for user call processing |
| CN102845128A (en) * | 2010-04-28 | 2012-12-26 | 惠普发展公司，有限责任合伙企业 | Techniques to provide integrated voice service management |
| CN102845128B (en) * | 2010-04-28 | 2016-03-23 | 高通股份有限公司 | For the technology providing the speech business of integration to manage |
| CN103152784A (en) * | 2013-03-15 | 2013-06-12 | 优视科技有限公司 | Communication method, communication device and communication system |
| CN103152784B (en) * | 2013-03-15 | 2015-11-25 | 优视科技有限公司 | Communication means, communicator and communication system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100512560C (en) | 2009-07-08 |
| KR100608793B1 (en) | 2006-08-08 |
| KR20050117398A (en) | 2005-12-14 |
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Owner name: LANGCHAO LEJIN DIGITAL MOBILE COMMUNICATION CO., L Free format text: FORMER OWNER: LG ELECTRONIC (CHINA) RESEARCH + DEVELOPMENT CENTRE CO., LTD. Effective date: 20120309 |
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