Dual band dual mode terminal supporting different packet frame modes and supporting method thereof

A method for supporting different packet frame modes in a terminal that supports transmission in different packet frames, wherein the terminal includes a video chip having a data communication protocol, the method comprising:

• the terminal performing packet data communication with a second communication network;
• the terminal performing packet processing by using the data communication protocol in packet data communication with a first communication network, wherein the terminal performing packet data communication with the second communication network including:
• directly providing a packet to a second network modem from the video chip when a packet is transmitted from the terminal to the second communication network in packet data communication, and
• receiving an IP frame at the video chip through the second network modem, the video chip performing packet processing and interworking with a socket when a packet is transmitted from the second communication network to the terminal,
• wherein the terminal performing packet processing by using the data communication protocol includes:
• converting an Internet Protocol (IP) packet to a Point to Point Protocol (PPP) packet in the video chip, converting the PPP packet into a PPP frame and providing the PPP frame across a Universal Asynchronous Receiver Transmitter (UART) interface to a first network modem when a packet is transmitted from the terminal and across the UART interface to the first communication network in packet data communication, and
• receiving a PPP frame at the video chip from the first network modem, converting the received PPP frame into an IP frame at the video chip, and performing packet processing and interworking with a socket when a packet is transmitted from the first communication network and across the UART interface to the terminal.

A method for supporting different packet frame modes in a terminal that supports transmission in different packet frames, comprising:

• judging a system mode by using a terminal including a video chip having a data communication protocol for a first network and a second network;
• transmitting packet data across a Universal Asynchronous Receiver Transmitter (UART) interface and across a first network modem chip to the first network when the judged system mode is a first communication service for the first network, the transmitting including performing Internet Protocol (IP) packet processing at the video chip with the data communication protocol and performing mutual conversion of IP packet and Point to Point Protocol (PPP) packets at the video chip only when in communication with the first network;
• transmitting a pertinent Internet Protocol (IP) frame across a second network modem chip to a second network by transmitting the IP packet directly to the second network modem chip when the system mode is a second communication service for the second network;
• receiving packet data from the first network;
• and
• receiving data from the second network.