Mobile communication terminal for supporting double-frequency voip and voip selecting method thereof

Abstract

The invention relates to a mobile communication terminal supporting dual-frequency VOIP and a VOIP selection method thereof. It includes the following parts: the main processing part, which is responsible for the overall control of the terminal, CDMA call processing and resource management, etc.; the codec conversion part, which converts the codec of the wireless LAN into a codec for CDMA; the VOIP signal processing part , to generate and analyze SIP and SDP signals received and sent by the other party through the network; the voice processing part, to process the voice data packets received and sent through the VOIP call; The wireless local area network processing part processes the wireless local area network signal output by the signal selection part into a predetermined signal and sends it, or receives the wireless local area network signal; the CDMA processing part processes the CDMA mobile communication signal output by the signal selection part into a predetermined signal and sends Send or receive CDMA mobile communication signals.

Description

Technical field [0001] The present invention relates to the Internet Voice Transfer Protocol (VOIP) technology, and particularly relates to the combination of VOIP and mobile communication terminals; specifically, a mobile communication terminal supporting dual-frequency VOIP and a VOIP selection method thereof. Background technique [0002] At present, VOIP, the technology of transmitting voice on the Internet, is developing in three directions. [0003] The first is a VOIP device on a wired LAN (local area network) based on the H.323 and SIP protocols that have been commercialized in the wired Internet. The second is a wireless VOIP device based on the wireless LAN interface that is currently being standardized. With the development of the mobile communication network, the bandwidth supported by the network has increased, and VOIP technology using wireless data services has also appeared in the mobile communication network. [0004] Due to the different working environments of ...

AI Technical Summary

Problems solved by technology

[0017] Of course, the standardization of wireless LAN has made a lot of progress recently, and the use is also very active, but there are still limitations in the VOIP service using wireless LAN. Operators have not set up a large number of APs ( Access Point), so there are fewer areas that support WLAN services

[0018] In addition, as far as wireless LAN is concerned, the frequency band that can be used for communication is the unlicensed band of 2.4 GHz. In the same frequency band, various radio wave services such as Bluetooth (Bluetooth) and infrared communication are provided, and the possibility of interference may occur. Very large, there are many limitations on the power of the power supply

[0019] In addition, the communication radius supported by one AP (Access Point) is small, and the support for inter-operator handover is not sufficient. When there is a lot of mobility, call interruptions frequently occur

[0020] Therefore, the VOIP terminal device used in wired Internet or wireless LAN and CDMA mobile communication has the following characteristics, that is, it is suitable for serving in areas with low mobility and limited area such as offices or hotels, and wireless LAN and CDMA 1X using the same wireless interface Mobile communication networks are not compatible with each other due to different frequency bands and wireless protocols

[0021] On the contrary, the VOIP technology supported by the mobile communication network is still in the introduction stage. Due to the characteristics of the mobile communication network, due to the small bandwidth, when there are many wireless Internet users, the voice service quality may decline

[0022] Moreover, due to the use of the mobile communication network, the usage fee is higher than that of general wired telephone or wireless LAN VOIP

In mobile communication, in order to meet the demand for wireless local area network, although the technology about the equipment for accommodating wireless local area network in the base station has been provided, there is still a limitation in handling CDMA calls by one base station, that is, for the case of supporting wireless local area network In general, because it does not support resource management and bandwidth, it is very likely that voice processing cannot be performed normally. If a base station needs to process too much work, the base station system will be abnormal, and users may not be able to make voice calls at all. situation

[0023] In addition, although there are also situations where mobile communication modules and wireless LAN cards are installed in PDAs to perform mobile communication voice calls (Voice Call) and wireless LAN data services, the problem is that VOIP services are not supported.

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