KR20040003272A - A cdma mobile phone of circuit data transmit with upgrade rate - Google Patents

Abstract

PURPOSE: A CDMA terminal having an improved circuit data rate is provided to transmit a signal as high-speed packet data by being connected with a wireless application unit, and to supply an asynchronous circuit data service by using an IS-95C system, thereby improving a data rate. CONSTITUTION: A baseband unit(210) processes user application data or fax data as a signal. An SIO(Serial Input Output) unit(220) transceives the signal in serial. A DS(Data Service) unit(230) processes operation data of the transceived signal. A call manager(240) generates and outputs a signal for call connection. A PS(Protocol Service) unit(250) processes the transceived signal to be transmitted between computers by accessing the Internet. A wireless application unit(260) supplies a circuit data service from a signal transmitted in packet system. A high frequency-C unit(270) transmits the signal as high-speed packet data.

Description

CDMA terminal with improved line data transmission rate {A CDMA MOBILE PHONE OF CIRCUIT DATA TRANSMIT WITH UPGRADE RATE}

The present invention relates to improving the data transmission speed of a CD-A terminal, and more particularly, to improving the data transmission speed by providing an asynchronous circuit data service using the IS-95C method.

ASYNCHRONOUS In the case of transmitting data from the terminal of the CD-based mobile communication system to the system, by establishing a call, it occupies a channel for communication and transmits / receives the corresponding data. RLP (RADIO LINK PROTOCOL) protocol is used to reduce data transmission error in the section.

In order to transmit a communication signal, a channel must be allocated and occupied, and the channel occupancy method is largely divided into a circuit data method and a packet data method, and the circuit data method is used to terminate a channel allocated by call setup. It keeps occupying until it is used independently, and the packet data method divides the data to be transmitted into packets of a certain size and adds addresses and transmits them in an arbitrary order. It's a way to use it at the same time.

The CDMA mobile communication system as described above uses IS-95 (Interim Standard-95) for data transmission, and is a standard for PCS in the 800 MHz band and the 1.9 GHz band.

Hereinafter, a CDA mobile communication system terminal according to the related art will be described with reference to the accompanying drawings.

1 is a diagram illustrating a protocol of a CDMA mobile communication system according to the prior art, FIG. 2 is a diagram illustrating a detailed functional configuration of a terminal according to the prior art, and FIG. Format structure.

Referring to FIG. 1, the CDMA mobile communication protocol according to the prior art is a TCP / IP (Transmission Control Protocol / Internet Protocol) protocol and a serial interface for transmitting data from the Internet by processing user data. Computer 10 for transmitting and receiving data processed by using a Point-to-Point Protocol (PPP) protocol for transmitting data between the computer and the computer,

An asynchronous CDMA terminal 20 for wirelessly processing data transmitted via a serial link and an RS-232 cable to the computer 10 by RLP (Radio Link Protocol) and IS-95A;

A CDMA mobile communication base station 30 wirelessly connected to the terminal 20 and performing data communication by RLP and IS-95A;

It connects to the base station 30, processes data by TCP / IP protocol and PPP protocol, and transmits the data to the public communication network through the built-in modem, the digital (DIGITAL) and analog (ANALOG) signal between IWF (InterWorking Function) 40 of the gateway (GATEWAY) which converts,

A public communication network (PSTN) 50 connected to the IWF 40 and establishing a corresponding path by a call request;

A modem 60 connected to the public communication network 50 and transmitting a signal;

It is composed of a host 70 is connected to the modem 60 and transmits the signal by processing the PPP protocol and TCP / IP protocol.

Referring to the CDMA mobile communication system protocol according to the prior art of the configuration described above, for example, when the user-oriented application data in the computer 10 is created and transmitted to the host 70, the computer 10 The user-oriented data (CLIENT APPLICATION) can be transmitted through the Internet by processing the TCP / IP protocol, and the data can be transmitted and received between computers by processing the TCP / IP-processed data as described above. And output to the terminal 20 in serial (SERIAL) through the RS-232 cable.

The terminal 20, as data received from the computer 10, RLP-processes the PPP protocol-processed data and wirelessly transmits the CDMA method by the IS-95A method.

As described above, the base station 30 that receives the data wirelessly transmitted from the terminal 20 by the CDMA method according to the IS-95A standard detects a transmission error occurring in the wireless transmission section by the RLP process. And recover and output to the IWF 40.

The IWF 40 demodulates a modem to be suitable for long-distance transmission of the data signal received from the base station 30, and outputs the demodulated signal to the public communication network 50, and the public communication network 50 processes the input signal. To switch to the set PATH by switching.

The data signal transmitted through the switched path through the public communication network 50 is received by the modem 60 and modulated and output to the host 70.

The host 70 performs a PPP protocol process on the signal input from the modem 60 to confirm transmission between computers, and completely recovers the PPP processed data by performing TCP / IP processing, and performs the corresponding process. .

Since data transmitted from the host 70 to the computer 10 are processed in the opposite direction to the above description, redundant description will be avoided.

By performing the above functions, the terminal 20 according to the prior art includes: a baseband unit 21 for application processing of a user signal;

A serial connection (SIO: SERIAL INPUT OUTPUT) section 22 connected to the baseband section 21 for transmitting and receiving signals in series;

A data (DS: DATA SERVICE) unit 23 connected to the serial connection unit 22 to process operational data and data to be transmitted;

A call management unit 24 connected to the data unit 23 to set a path PATH to which data is transmitted;

A protocol unit 25 connected to the serial connection unit 22 and the data unit 23 for processing TCP / IP protocol processing and PPP protocol processing as well as in the opposite direction;

A wireless protocol unit 26 for connecting to the protocol unit 25 and transmitting and receiving a signal applied to the protocol unit 25 by RADIO LINK PROTOCOL (RLP);

A high frequency unit 27 is connected to the wireless protocol unit 26 and transmits and receives a signal applied by the CDMA IS-95A method.

Referring to the terminal 20 according to the prior art having the configuration described above as an example, the user application data applied from the baseband unit 21 or the user application data applied from the computer 10 to the serial connection unit 22. By serial data, the serial connection section 22 outputs to the data section 23 and the protocol section 25, respectively.

The data unit 23 receives the path setting data to which the user application data is to be transmitted from the call management unit 24, performs a corresponding process, and outputs it to the protocol unit 25.

The protocol unit 25 performs a PPP protocol process at the same time as performing a TCP / IP protocol process and outputs the signal applied from the data unit 23 to the radio protocol unit 26.

When the wireless protocol unit 26 processes the input signal by the RLP protocol and outputs the signal to the high frequency unit 27, the high frequency unit 27 wirelessly outputs data in an IS-95A manner.

The IS-95A system processed by the high frequency unit 27 provides circuit data service, and the maximum data transmission rate is 14.4 Kbps.

The RLP data format transmitted from the wireless protocol unit 26 according to the prior art will be described with reference to FIG. 3 as described above. The data format for transmitting data is 171 bits to 267 bits in the SEQ region specifying the order. Bits are allocated, 160 bits for RATESET 1, 256 bits for RATESET 2, and 3 bits for TYPE as the data area.

In addition, the header format for transmitting the header information is allocated 8 bits to the SEQ region specifying the order, and 8 bits are allocated to the control and length (CTL / LEN) region, and the information and data (INFO / DATA). A region allocates bits that specify in the length of the control and length bit regions.

In addition, the idle format when data is not sent, allocates 8 bits to the SEQ region specifying the order and allocates 8 bits for the FCS (FRAME CHECKING SEQUENCY) signal to maintain the occupied line. do.

The conventional CDMA terminal having the above configuration has a problem in that when the circuit data service is provided by the IS-95A method, the maximum data transfer rate cannot be provided at 14.4 Kbps or more.

Therefore, when providing a line data service using a CDMA mobile communication terminal, it is not possible to provide a high-speed data service of up to 14.4 Kbps, there is a problem that the competitiveness and reliability is lowered.

An object of the present invention is to provide a terminal capable of improving a data transmission speed in the case of a line data service for transmitting fax data or the like through a CDMA mobile communication system.

The present invention has been made to achieve the above object, in the terminal of the CD-based mobile communication system; A baseband unit for processing user application data or fax data; A serial connection part connected to the baseband part to transmit and receive a signal in series; A data unit connected to the serial connection unit and processing operational data of the transmitted and received signal; A call management unit connected to the data unit to generate and output a signal for call connection; A protocol unit configured to perform protocol processing so that signals transmitted and received connected to the data unit are transmitted between computers through the Internet; A wireless application unit connected to the protocol unit and providing line data service from a signal transmitted in a packet manner; It is characterized in that the high-frequency time unit is connected to the wireless application unit for transmitting a signal as high-speed packet data.

1 is a protocol diagram of a CDMA mobile communication system according to the prior art;

2 is a detailed functional configuration of a terminal according to the prior art,

3 is a RLP format structure according to the prior art,

4 is a functional block diagram of a terminal with improved line data transmission rate of the present invention;

5 is a schematic diagram of an RLP format applied to the present invention.

** Explanation of symbols on the main parts of the drawing **

10: computer 20,200: terminal

21,210: Baseband part 22,220: Serial connection part

23,230: data part 24,240: call management part

25,250: Protocol section 26: Wireless protocol section

27: high frequency unit 30: base station

40: IWF 50: public communication network

60: modem 70: host

260: wireless application unit 270: high frequency time unit

Hereinafter, the present invention will be described with reference to the accompanying drawings the CD terminal with improved line data transmission speed.

It is attached to explain the present invention. FIG. 4 is a functional block diagram of a terminal having improved line data transmission rate, and FIG. 5 is a RLP format block diagram applied to the present invention.

Referring to FIG. 4, according to the present invention, a CDA (CDMA) terminal 200 having improved line data service transmission speed is provided.

A baseband unit 210 for generating or receiving CLIENT APPLICATION DATA or FAX data processed by the user and processing the corresponding signal;

A serial connection (SIO: SERIAL INPUT OUTPUT) unit 220 connected to the baseband unit 210 to transmit and receive a signal in serial;

A data service unit 230 connected to the serial connection unit 220 to process operation data of a corresponding signal transmitted / received to the baseband unit 210;

A call manager 240 connected to the data unit 230 to generate and output a signal for a call connection to which the signal of the baseband unit 210 is transmitted;

A protocol (PS: PROTOCOL SERVICE) unit 250 for processing the TCP / IP protocol and the PPP protocol so that signals transmitted and received connected to the data unit 230 are transmitted between computers through the Internet (INTERNET),

By providing the line data service from the signal transmitted in a packet manner by being connected to the protocol unit 250, the circuit data service is performed even in the packet data method by performing RLP (RADIO LINK PROTOCOL) 3 protocol processing on the applied signal. Wireless application unit 260 to provide,

The high frequency time unit 270 is connected to the wireless application unit 260 and transmits a signal as high speed packet data, thereby processing an applied signal according to an IS-95C method and transmitting the signal at high speed. do.

Hereinafter, the present invention having the above-described configuration will be described in detail with reference to FIGS. 4 and 5 attached to the CD terminal with improved data transmission speed of the circuit data service.

CODE DIVISION MULTIPLE ACCESS (CDMA) There are IS-95A, IS-95B, and IS-95C schemes for the data transmission scheme of the mobile communication system.

The IS-95A method is for the CIRCUIT DATA service and has a data rate of 14.4 Kbps, and the IS-95B method is assigned a data rate of 14.4 Kbps for the circuit data service and the packet data (PACKET). For data service, a data rate of 64 Kbps is allocated.

The IS-95C method is for packet data service, so a data transmission rate of 144 Kbps is assigned, so that data can be transmitted at high speed. Circuit data services cannot be provided.

In the IS-95C scheme as described above, it is an RLP 3 protocol to provide circuit data service at a data transmission rate of 33.6 Kbps.

The present invention relates to a terminal for improving the data transmission rate of CIRCUIT DATA SERVICE to 33.6 Kbps by applying the RLP 3 protocol in a CDMA mobile communication system applying the IS-95C scheme as described above.

The line data service is to be used for communication in a state in which a channel is allocated and continues to occupy real time. For example, the line data service is used when transmission and reception of signals such as voice communication and FAX data communication must be continued. Will be.

Referring to FIG. 4, the baseband portion (Rm) 210 processes a signal for voice communication or fax data communication, resulting in a computer (PC) or a telephone or a fax machine.

The baseband portion (Rm) 210 as described above is connected to the serial connection unit 220 to transmit and receive a signal in serial (SERIAL), the serial connection unit 220 and the data (DS: DATA SERVICE) unit 230 It is connected to the protocol (PS: PROTOCOL SERVICE) unit 250 to transmit and receive the corresponding signal.

For example, when transmitting the signal generated from the baseband unit 210, the data unit 230 is applied from the call management unit 240 with the unique number or address of the terminal to receive the signal is transmitted In addition to the signal applied from the baseband unit 210 and outputs to the protocol unit 250.

The protocol unit 250 performs a transmission control protocol (TCP) protocol, an internet protocol (IP) protocol, and a point-to-point protocol (PPP) protocol processing of the signal applied from the data unit 230. )

The wireless application unit 260 is a protocol process for improving the transmission speed of the circuit data service of the present invention, and provides an effect of occupying a channel in real time like a circuit data service in a state of providing a packet data service. After the modulation process is performed using the RLP 3 (RADIO LINK PROTOCOL 3) protocol, the signal is output to the RF-C unit 270.

The RF-C unit 270 processes an RLP 3 protocol modulated signal applied from the radio application unit 260 in an IS-95C manner to be transmitted wirelessly.

The IS-95C method transmits signals at a transmission rate of 144 Kbps when transmitting signals by packet data service, and transmits signals at an improved transmission rate of 33.6 Kbps when transmitting signals by circuit data service.

Since the signal generated from the baseband unit 210 and subjected to RLP 3 protocol modulation through the wireless application unit 260 is intended to use a line data service, the high frequency time unit 270 is connected to the line data service. Wirelessly transmits the signal at 33.6 Kbps.

In this case, the base station 30 is also configured to receive a signal transmitted in the IS-95C method and at the same time can be demodulated processing the signal modulated by the RLP 3 protocol.

As another example, when the terminal 200 receives a signal transmitted through the RLP 3 protocol from the base station 30 at a rate of 33.6 Kbps of the IS-95C type circuit data service wirelessly, the high frequency time unit 270 may receive a signal. It receives and processes the 33.6 Kbps line data service of the IS-95C method and outputs the same to the wireless application unit 260.

The wireless application unit 260 recovers the data form of the circuit data service by demodulating the signal applied from the high frequency time unit 270 by RLP 3 protocol processing, and outputs the data to the protocol unit 250. 250 decodes the PPP protocol and the TCP / IP protocol and applies it to the data unit 230.

The data unit 230 applies a header signal portion to the call manager 240, and the call manager 240 analyzes the header signal, thereby making the phone number the destination of the terminal 200. Or determine the address.

When the terminal 200 is the destination by the header signal analysis process of the call manager 240, a corresponding signal is output to the data unit 230, and the data unit 230 is connected to the serial connection unit 220. The signal is applied by the line data service, and the serial connection unit 220 outputs the signal by the line data service to the baseband unit 210 in serial.

Accordingly, the baseband unit 210 uses an asynchronous CDMA mobile communication system, and uses the RLP 3 protocol and the IS-95C scheme to provide circuit data service at an improved transmission rate of 33.6 Kbps instead of the conventional maximum 14.4 Kbps transmission rate. It is available.

Referring to FIG. 5, the data format (FULL RATE FRAME FORMAT) is allocated two bits for the type (TYPE), 8 bits for the SEQ indicating the order and bits for the variable (VARIABLE) state for the data The header format (GENERIC FRAME FORMAT) is 2 bits for TYPE, 8 bits for SEQ indicating order, 1 bit for SSP indicating whether or not there is S_SEQ value, and whether there is SEQ_HI. Or 1 bit for SQI indicating no, 1 bit for LAST_SEG indicating last data frame, 1 bit for REXMIT indicating retransmission, 8 bits for LEN indicating length of data, 0 or for SEQ_HI 4 bits, 0 or 12 bits for S_SEQ, VARIABLE bits for PADDING_1 indicating margins, 8 * LEN bits for data to be transmitted, for PADDING_2 indicating margins Shows that allocate variable (VARIABLE) bits each.

The present invention having the configuration described above has an industrial use effect of providing an improved line data service of 33.6 Kbps by the RLP 3 protocol and the IS-95C method of the asynchronous CDMA mobile communication system terminal.

In addition, the terminal user according to the present invention is provided with a line data service of an improved transmission rate of 33.6 Kbps compared to the conventional maximum 14.4 Kbps, it is convenient to use the effect of improving the reliability of the system while transmitting a large amount of data quickly have.

Claims (3)

In the terminal of the CD-based mobile communication system, A baseband unit for processing user application data or fax data; A serial connection unit connected to the baseband unit for transmitting and receiving signals in series; A data unit connected to the serial connection unit and processing operational data of the transmitted and received signal; A call management unit connected to the data unit to generate and output a signal for call connection; A protocol unit configured to perform protocol processing so that signals transmitted and received connected to the data unit are transmitted between computers through the Internet; A wireless application unit connected to the protocol unit and providing line data service from a signal transmitted in a packet manner; And a high frequency time line unit connected to the wireless application unit to transmit a signal as high speed packet data. The method of claim 1, wherein the wireless application unit, A CDM terminal having improved line data transmission speed, characterized by providing circuit data service even in a packet data method by performing an RLP protocol. The method of claim 1, wherein the high frequency viewing portion, It is a high-speed transmission of the line data transmission CDM characterized in that the high-speed transmission by processing the applied signal in accordance with the IS 95 hour system.