KR19980075722A - Asynchronous Communication Data Calling and Calling Service in Code Division Multiple Access Mobile Network - Google Patents

Abstract

The present invention relates to an asynchronous communication data service method, which is one of wireless data services in a code division multiple access (CDMA) mobile communication network, and enables a user to use the same user interface and communication software as in a conventional wired environment. By placing the protocol stack in the mobile terminal so as not to be involved in the protocol, asynchronous communication data origination and reception in a code division multiple access mobile communication network enables wireless asynchronous communication data service of the same quality as wired in a high error rate wireless environment. A call service method is presented.

Description

Asynchronous Communication Data Calling and Calling Service in Code Division Multiple Access Mobile Network

The present invention relates to a method of asynchronous communication data service, and in particular, the same user interface and communication software as in a conventional wired environment can be used to service asynchronous communication data in a code division multiple access (hereinafter referred to as CDMA) mobile communication network. And by placing the protocol stack in the mobile terminal so that the user is not involved in the protocol, the asynchronous communication in a code division multiple access mobile communication network enables wireless asynchronous communication data service of the same quality as wired in a high error rate wireless environment. The present invention relates to data calling and incoming call service methods.

Currently, CDMA networks are mainly serviced for voice, and data services between end-to-end and mobile communication subscribers have not been developed yet. The subscriber enters the telephone number of the called user by pressing the keypad of the mobile terminal handset and receives a voice call with the other subscriber through the handset handset. At this time, by loading asynchronous communication data instead of voice on the channel through which voice is transmitted, the subscriber can receive services other than voice.

In general, the connection of a hightel or cheonrian through a public telephone network or an Internet service is made possible by connecting a data modem connected to a computer to a terminal access port (telephone port) of a public telephone network. At this time, the data modem converts the digital data of the octet (8 bit) from the computer into an analog signal of the public telephone network and sends it to the network, or converts the analog signal received from the network into digital data and sends it to the computer.

However, in the CDMA mobile communication, all data up to the end of the network can be transmitted digitally, and thus data conversion is required only when transmitting from the mobile communication to the public telephone network or other heterogeneous network. Accordingly, in CDMA mobile communication, an interworking function (IWF) network for converting data is provided to a fixed station such as a base station device or a mobile switching center. This IWF has a pool of data modems, protocol conversion between CDMA mobile communications and heterogeneous networks, and speed matching with subsystems within the network. However, in the wireless communication environment function, there is a problem in that reliability is degraded due to noise, fading and handover, and a separate device for interconnection is required.

Accordingly, the present invention provides the same user interface and communication software as in the existing wired environment over the air, and by placing the protocol stack in the mobile terminal so that the user does not participate in the protocol, the wired and wireless network in the high error rate wireless environment An object of the present invention is to provide an asynchronous communication data originating and incoming call service method in a code division multiple access mobile communication that enables a wireless asynchronous communication data service of the same quality.

The present invention for achieving the above object is the step of inputting a modem initialization command to the data terminal when the shape of the mobile station that the mobile subscriber has a data terminal and the mobile terminal, and when a modem dial command is received from the data terminal Recognizing this by the mobile terminal and initiating an outgoing call for the asynchronous communication service option using the same call processing procedure as the existing voice call processing procedure, assigning a call channel from the base station to the outgoing signal of the mobile terminal, Initializing and synchronizing the radio link protocols of the mobile station and the base station when the service option message is responded; and linking the mobile terminal and the interconnection function network after the point-to-point protocol of the interconnection function network is self-initializing To initialize and synchronize the control protocol. Negotiating header compression of a manganese protocol address and a transmission control protocol / manganese protocol after initializing and synchronizing the link control protocol; and for controlling the modem of the mobile terminal and the base station interconnection function network. Allocating modem initialization commands and dial commands stored in the terminal; and receiving asynchronous communication data when an access modem response message indicating a call connection from the interconnection function network is received. It is characterized by.

In addition, when the shape of the mobile station that the mobile subscriber has a data terminal and a mobile terminal, the step of inputting a modem initialization command to the data terminal, and the base station to the existing signal for the start signal of the mobile terminal to the incoming signal of the mobile terminal Paging the mobile terminal with an asynchronous data service option using the same call processing procedure as that of the voice call processing procedure, receiving and storing the mobile terminal and sending a page response message to the base station to the base station; When the call channel is allocated or alarm information is received, the mobile terminal notifies the data terminal of an incoming call, the data terminal responds to the call with a modem response command, and the mobile terminal recognizes the modem response command to connect to the base station. Informing the message, the base Initializing the radio link protocol of the base station and the mobile terminal when the service option option response message is returned from the mobile terminal; and a point-to-point protocol of the interconnection function network of the mobile terminal and the base station when the radio link protocol is initialized. Initializing and synchronizing with each other; negotiating header compression of a manganese protocol address and a transmission control protocol / manganese protocol after initializing and synchronizing the link control protocol; and Allocating previously stored modem initialization instructions and dial instructions for modem control, and when a connection modem response message is received from the interconnection network informing a call connection with the other party, the user provides asynchronous communication data. Steps you can take It characterized by comprising.

1 is a schematic diagram of a network reference model presented in a standard;

2 is a structural diagram of a protocol stack presented in a standard.

3 is a structural diagram of a protocol stack to which the present invention is applied.

4 is a block diagram of a system to which the present invention is applied.

5 is a flow diagram of a data service call procedure and protocol operation in accordance with the present invention.

6 is a flow diagram of a data service call procedure and protocol operation in accordance with the present invention.

Explanation of symbols for the main parts of the drawings

100: data terminal 120: mobile terminal

140: base station 160: public telephone network

170: fax modem 200: asynchronous data and fax

210: application interface 220: feed control protocol (TCP)

230: network control message protocol (ICMP) 240: intercommunication network protocol (IP)

250: network dependent convergence function (SNDCF) 260: network control protocol (IPCP)

270: link control protocol (LCP) 280: point-to-point protocol (PPP)

290: Radio Link Protocol (RLP) 300: TIA / EIA / IS-95 Call Channel

1 is a configuration diagram of a data service network reference model shown in IS-99. Currently, TIA / EIA / IS-99 (Data service option standard for wideband spread spectrum digital cellular system; IS-99) standard has been published for the development of data services in CDMA mobile communication networks. Proposed based on IS-99.

The terminal TE2 (hereinafter referred to as TE2) represents a data terminal 100 having a user interface, and the mobile terminal MT2 (hereinafter referred to as MT2) provides a transmission path for data. As the CDMA mobile terminal 120, it configures the Rm interface 110 with the TE2 100 physically having an EIA / TIA / RS-232-E interface. A base station (BS) 140 is a CDMA base station 140 having a MT2 120 and a Um interface 130 (which integrates both a base station apparatus and a mobile exchange), and is a public telephone network (hereinafter referred to as a PSTN). Has an IWF for interworking with 160. The base station 140 and the PSTN 160 are composed of an Ai interface 150, and a fax modem (DCE; Data Circuit Equipment) 170 and the TE2 180 have a user interface used in a conventional PSTN.

The present invention proposes only an interface for asynchronous communication data transmission between TE2, MT2, and a base station (hereinafter, referred to as BS), and the shape of PSTN or more follows the shape of existing wired or analog mobile communication.

The shape of the case where the caller / caller is the same CDMA mobile communication has a shape in which the stages below the BS are reflected to both sides.

2 is a structural diagram of a protocol stack presented in a standard. The protocol stack has a Um interface function between the MT2 and the BS according to IS-99. This protocol stack is proposed in the standard for reliable data transmission between user's data terminal and IWF in unreliable wireless environment due to noise, fading and handover. The protocol stacks are as follows.

Async Data and FAX 200 represent application software for data services. The application interface 210 has functions such as a standard or extended AT command processor and data compression negotiation. This protocol stack uses transport protocol / network protocol (TCP / IP) (220/240), which is widely used in the Internet, as a protocol of transport layer and network layer, and manganese for transmitting these packets through a serial link. Subnetwork for compression control protocol (IPCP) 250, link control protocol (LCP) 270, point-point protocol (PPP) 280 and transmission control protocol / network-to-network protocol (TCP / IP) header compression Sub-Network dependent convergence function (SNDCF) protocol 250 and the like are implemented. On the air interface between the mobile station and the base station in the CDMA network, there is more noise and fading than the conventional wired channel, and the data service has a lower bit error rate (BER) on the wireless communication channel than the voice service. Rate). Radio Link Protocol (RLP) 290 is a link layer protocol that compensates for the limitations on the wireless communication channel of this data service, and is responsible for synchronization, data retransmission, and flow control between the two stations. The radio link protocol 290 layer divides a variable length data packet of a higher layer into a TIA / EIA / IS-95 call channel frame according to a multiplexing sublayer according to the TIA / EIA / IS-95 call channel 300, and a higher layer. Since it does not participate in the frame construction method of the upper layer, frames in the upper layer are regarded as a series of octets not related to a specific service and are transmitted in the order received from the upper layer.

3 is a structural diagram of a protocol stack applied to the present invention. In the present invention, the configuration of the mobile station to be implemented when implementing the protocol stack of FIG. 2 on the network reference model of FIG. It describes and proposes the location and operation of the protocol stack related to this.

Run the communication emulator used in the existing wire in the data terminal (notebook computer), install the sub-AI protocol on the CDMA mobile terminal handset 320, and physically connect the data terminal and the mobile terminal handset to the RS-232-E compatible cable. And the pairs of these protocols are distributed or integrated at various locations of the base station to form a configurable form 330. This feature basically imposes a burden on the handset by implementing all protocol stacks, but from the user's point of view, the user's convenience and purchase of software can be diversified by using the communication emulator software currently used for asynchronous communication services in public telephone networks. have.

4 is a configuration diagram of a system to which the present invention is applied. An example of a configuration of a CDMA asynchronous communication service system configured according to the location of the protocol stack specified in FIG. 3.

A subscriber having a notebook computer 400 and a mobile handset 420 and an RS-232-E compatible cable 410 connecting the notebook computer 400 and the handset 420 may use a private network such as a clairvoyant or a hightel by using a CDMA network. The connection to the BBS (440) is shown virtually.

5 is a flowchart of a data service call procedure and protocol operation according to the present invention. 4 illustrates an asynchronous communication transmission procedure when a mobile subscriber attempts to make a call.

The data terminal 501 inputs a modem initialization command (* 1) 500 as if using a modem, and the AI of the mobile terminal 502 receives and stores it and sends an appropriate response to the command. When the modem dial command (* 2) 510 is received from the data terminal 501, the AI of the mobile terminal 502 recognizes this and the asynchronous communication service option is performed with the same call processing procedure 520 as the existing voice call processing procedure. Initiate a call for the number 4; This asynchronous communication service option 4 is already reserved as the basic procedure for service identification in CDMA network.

If a call channel is allocated from the base station 503 to the call of the mobile station initiation, and the service option is answered 530, the mobile terminal 502 initializes the radio link protocol 540. When the radio link protocol 540 is initialized, the mobile terminal 502 and the IWF point-to-point protocol 550 initialize a serial link by driving a link control protocol (LCP) 560 after self-initialization and manganese control. Negotiate manganese protocol (IP) address and transmission control protocol / manganese protocol (TCP / IP) header compression using protocol (IPCP) 570. TCP / IP 580 is then driven, and AI 590 Send the previously saved modem initialization commands (* 1) and dial command (* 2) to the base station (BS) for modem control of the IWF CONNECT modem response message (notifying the call connection from the IWF to the other party) When 600 is input, the user may receive asynchronous communication data 610.

6 is a flowchart of a data service call procedure and protocol operation according to the present invention. 4 illustrates an asynchronous communication transmission procedure when the mobile subscriber receives a call as an example.

The data terminal 701 inputs a modem initialization instruction (* 3) 700 as if using a modem, and the AI of the mobile terminal 702 receives and stores it and sends an appropriate response to the instruction. The base station 703 pages 710 the mobile station to the asynchronous data service option number 4 with the same call processing procedure as the existing voice call processing procedure for the call of the mobile station to the mobile station incoming call, and the mobile terminal 702 Responds 720 to asynchronous data service option 4 with a page response message. This includes both the case where the base station 703 can identify a call coming from the public telephone network and the use of a service option reserved between the mobile terminal 702 and the base station 703 in advance. In the same manner as the voice processing, a call channel is allocated from the base station 703 to the call channel 730, and when alarm information is received (740), the mobile terminal 702 notifies the call of the call to the data terminal 701 (750). The data terminal 701 answers the call with a modem response command (* 4) 760. The AI of the mobile terminal 702 recognizing the modem response command (* 4) notifies the base station 703 of the call response (770). When the service option is answered from the base station 703 (780), the mobile terminal 702 initializes a radio link protocol (RLP) 790. When the radio link protocol (RLP) 790 is initialized, the mobile terminal 702 and the point-to-point protocol (PPP) 800 of the IWF initialize the serial link by driving the link control protocol (LCP) 810 after self initialization. IP address and TCP / IP header compression are negotiated using a network control protocol (IPCP) 820. The TCP / IP 830 is then driven, and the AI sends the previously stored modem initialization instructions (* 3) and response instructions (* 4) to the base station 703 for modem control of the IWF (840). When a CONNECT modem response message 850 notifies the call connection with the other party from the IWF, the user may receive asynchronous communication 860.

As described above, according to the present invention, a subscriber in a CDMA network can receive an asynchronous communication service that guarantees the same form and quality as in a conventional wired service, and a user services in a computer environment that a user has without additional device and protocol knowledge. Because of this, there is an excellent effect that brings convenience to the user.

Claims (2)

Inputting a modem initialization command to the data terminal when the shape of the mobile station that the mobile subscriber has is the data terminal and the mobile terminal; Receiving a modem dial command from the data terminal and initiating an outgoing call for the asynchronous communication service option using the same call processing procedure as the existing voice call processing procedure; Allocating a call channel from the base station to the originating signal of the mobile terminal, and initializing and synchronizing a radio link protocol of the mobile terminal and the base station when a service option message is answered; Initializing and synchronizing the link control protocol after the point-to-point protocol of the mobile terminal and the interconnection function network is initialized itself when the radio link protocol is initialized and synchronized; Negotiating header compression of a manganese protocol address of a manganese control protocol and a transmission control protocol / manganese protocol after initialization and synchronization of the link control protocol; Allocating previously stored modem initialization instructions and dial instructions for modem control of the mobile terminal and base station interconnection network; Asynchronous communication data transmission in a code division multiple access mobile communication network comprising a step in which a user can receive asynchronous communication data when an access modem response message indicating a call connection with an opposite party is received from the interconnection function network. Call service method. Inputting a modem initialization command to the data terminal when the shape of the mobile station that the mobile subscriber has is the data terminal and the mobile terminal; The base station paging the mobile terminal with an asynchronous data service option with the same call processing procedure as the existing voice call processing procedure with respect to the start signal of the mobile terminal with respect to the incoming call of the mobile terminal; Receiving, storing, and sending the page response message to the base station by the mobile terminal; The mobile terminal notifies the data terminal of an incoming call when a call channel is allocated from the base station or an alarm information is received, and the data terminal responds to the call with a modem response command; The mobile terminal recognizing the modem response command, informing a base station of a connection command message; Initializing a radio link protocol of the base station and the mobile terminal when a service option option response message is received from the base station to the mobile terminal; Initializing and synchronizing the point-to-point protocol of the interconnection function network of the mobile terminal and the base station when the radio link protocol is initialized; Negotiating header compression of a manganese protocol address of a manganese control protocol and a transmission control protocol / manganese protocol after initialization and synchronization of the link control protocol; Allocating previously stored modem initialization instructions and dial instructions for modem control of the mobile terminal and base station interconnection network; Asynchronous communication data reception in a code division multiple access mobile communication network comprising a step in which a user can receive asynchronous communication data when an access modem response message indicating a call connection with an opposite party is received from the interconnection function network. Call service method.