KR0176099B1 - Construction of mobile station for short message service - Google Patents

Abstract

The present invention provides a first process of connecting between a computer and a CDMA mobile terminal using an RS-232C protocol, by placing a transport layer in the computer and connecting to the RS-232C protocol to communicate with the CDMA mobile terminal. A second process, a third process of placing a teleservice layer on the computer and connecting to the transport layer, a relay layer on the CDMA mobile terminal, and connecting to the RS-232C protocol to communicate with the computer A fourth process and a fifth process of locating the link layer in the CDMA mobile terminal and connecting the relay layer to the CDMA mobile terminal can reduce the load of the mobile terminal as the additional service continues to expand.

Description

How to Configure Mobile Station to Support Short Message Service

1 is a diagram illustrating a short service protocol stack presented by IS-637.

2 is a diagram illustrating a method of configuring a mobile station according to the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for configuring a mobile station for supporting short service, and more particularly, to a method for configuring a mobile station for supporting short service in a CDMA cellular system.

In general, in a CDMA cellular system, a short service is a simple message including numbers and letters exchanged between mobile stations using a control channel (paging channel, access channel) as well as a traffic channel.

Currently, domestic standards for short text services have not been finalized, but in the United States, the interim standard 'EIA / TIA IS-637' is documented.

In the teleservice layer, which is one of the short service protocols, five messages are defined, and these messages are filled in the CHARi field of the data burst message defined in 'IS-95-A'. Exchanged.

The transmitted message is not delivered to the called party at once, but is stored in the message center in the middle and then delivered when the called party is in a reception state.

1 is a diagram illustrating a short service protocol stack proposed by IS-637.

Referring to FIG. 1, the short service protocol stack proposed by IS-637 is described as follows.

The relay layer 12A, 12B receives the message of the transport layer 13A, 13B and fills it in the data burst message defined in IS-95-A.

Thus, the message can be delivered to the base station and serves to provide error indication to the transport layer 13A, 13B when necessary by monitoring the delivery of the message.

The transport layer 13A, 13B forwards the message received from the teleservice layer 14A, 14B to the relay layer 12A, 12B in the form of a message of the transport layer 13A, 13B, and relay layer 12A. The message received from 12B is delivered to the teleservices layers 14A and 14B.

In addition, the transport layer 23 performs authentication related calculations whenever necessary.

The teleservices layers 14A and 14B located at the bearer service end point provide the basic functions of the short service.

However, this requires an expensive adapter and the load of the mobile terminal is saturated due to the continuous expansion of additional services.

The present invention devised to solve the above problems is an object of the present invention to provide a method for configuring a mobile station to support a short service that can be implemented without a separate adapter.

A feature of the present invention for achieving the above object is a first step of connecting between a computer and a CDMA mobile terminal using an RS-232C protocol, by placing a transport layer in the computer and connecting to the RS-232C protocol to the CDMA A second process of enabling communication with a mobile terminal, a third process of placing a teleservice layer in the computer and connecting it to the transport layer, a relay layer in the CDMA mobile terminal and connecting to the RS-232C protocol And a fourth process of enabling communication with the computer and a fifth process of placing a link layer in the CDMA mobile terminal and connecting to the relay layer.

In the CDMA cellular system, when a mobile terminal inputs a text message during a short message service, a mobile terminal requires a separate keypad. Therefore, a separate external input device is required. However, the IS-637 provisional standard for short message service requires an external message input. There is no specific description of device attachment or protocol location.

Meanwhile, the GSM cellular system widely used in Europe adopts a structure for connecting a mobile terminal, an adapter (smart card or SIM), and a personal computer in the shape of a mobile station for short service.

At this time, a personal computer is used as an external device for inputting a message using a keyboard, and the adapter includes a protocol necessary for service, but the adapter is a piece of hardware and requires a separate purchase.

On the other hand, the prior art about the implementation of the mobile station for short service has not been published in Korea yet.

Accordingly, the present invention proposes a specific method of attaching a personal computer to a mobile terminal without a separate adapter as a short message input device.

Hereinafter, with reference to the accompanying drawings will be described in detail one of the preferred embodiments according to the present invention.

2 is a diagram showing a method of configuring a mobile station according to the present invention.

Referring to FIG. 2, a method of configuring a mobile station according to the present invention will be described.

The present invention connects a personal computer and a CDMA mobile station in a communication method using the RS-232C protocol and locates a teleservice layer 24 and a transport layer 23, which are part of a protocol defined for short service, in a personal computer and relays them. Layer 22 is formed in a structure that is located in the CDMA mobile station.

This enables the short service provided by CDMA digital cellular systems.

The CDMA mobile terminal, which provided only the voice service of the related art, modifies only the software to support the relay layer 22 and RS-232C, and adds a message transmission / reception routine using RS-232C to the personal computer to process the short message.

Therefore, the present invention as described above is directly connected to a personal computer when you want to enter a short-term service in the CDMA mobile station, so that the adapter used in the GSM system of Europe is unnecessary, so that a separate purchase cost can be reduced and the installation is simple. In addition, by moving the protocol (transport layer and teleservices layer) located in the adapter to the personal computer, it is effective in reducing the load on the mobile terminal as the additional service continues to expand.

Claims (1)

A first step of connecting between a computer and a CDMA mobile terminal using the RS-232C protocol; A second process of placing a transport layer on the computer and connecting to the RS-232C protocol to communicate with the CDMA mobile terminal; A third step of locating a teleservice layer on the computer and connecting to the transport layer; A fourth step of placing a relay layer in the CDMA mobile terminal and connecting to the RS-232C protocol to communicate with the computer; And a fifth process of placing a link layer in the CDMA mobile terminal and connecting the link layer to the relay layer.