KR19980045200A - Location registration and release method of CT2 terminal with built-in wireless pager using wireless call network - Google Patents

Abstract

The present invention provides a method of registering and releasing a location of a built-in wireless pager CT2 terminal using a wireless call network by adding a function of a wireless pager to the CT2 terminal.

That is, the radio pager receives the radio call signal transmitted from the radio call system, detects an address code corresponding to its cap code, and includes location registration or release command data in the message codeword of the received radio call signal. Determining whether or not the operation is performed, and when the location registration or release command data is detected, the pager sends the command to CT2, and the CT2 receiving the command performs location registration or release based on the command. Location registration and release method of the built-in wireless pager CT2 terminal using a wireless call network consisting of. In addition, distinguishing the location registration or release is characterized by using the message codeword of the POCSAG signal and is performed through the interworking between the wireless call network and the CT2 network.

Description

Location registration and release method of CT2 terminal with built-in wireless pager using wireless call network

The present invention relates to a method for automatically registering and releasing a location of a cordless telephone built-in cordless telephone 2nd generation (CT2) terminal using a wireless call network. The present invention relates to a method of registering and releasing a location of a built-in wireless pager CT2 terminal capable of providing a bidirectional service of an additional service and an incoming service.

Recently, with the continuous development of the technology related to the paging network and pager device, the service area has been expanded and the call reception rate has been improved, and the call signal is transmitted to the subscribers using the paging service network (PSIN) and the wireless call network. This is a reception-only service that delivers messages to and from the public.In order to satisfy subscribers' needs for outgoing calls, the analog-type home wireless telephone (CT1) has been advanced, and it is a popular service using a small, low-power terminal called pedestrian-oriented CT2 that can communicate outdoors Has emerged. The public CT2 service is a mobile phone service exclusively for outgoing calls.The base station is installed on the wall or on the roof of a building where frequent people come and go, such as stations, malls, airports, bus terminals, and streets, and subscribers registered within the call radius of the base station (200m) Ramen is a service that anyone can talk to. For business and home use, base stations are installed in the building. As CT2 is pointed out as the biggest disadvantage, only various transmission methods have been taken. In addition to the built-in wireless call function, there is a method of adding 'Meet-Me' service and automatic and manual call function. The built-in wireless call and 'Meet-Me' service can be regarded as an indirect call method and can be called directly on the CT2 terminal. The 'Meet-Me' service is a service in which a CT2 subscriber calls the CT2 system and talks to a waiting oscillator when the caller calls the CT and waits without hanging up. When the subscriber of the CT2 terminal moves the passive call, the user can register his / her location directly with the base station and receive the call as long as the subscriber does not leave the base station. In the automatic call forwarding, the base station tracks the terminal and can automatically receive the call without the subscriber registering the location manually. Therefore, CT2 is expected to start from the outgoing call only and provide the incoming service now, and it will evolve into the universal service of personal mobile communication by applying the improved location registration, handover and roaming service in the future. From the development of the initial CT2 network itself, it is evolving toward providing interworking and data communication with other service networks. The development direction of CT2 will form an axis of PCS together with cellular, and if cellular evolves into a high tier PCS, the CT2 will transmit and receive voice with the aim of evolving to low tier PCS. Of course, it will evolve into a personal communication service capable of transmitting and receiving data.

Here, PCS (Personal Communications Service) is classified into two categories. One is 'High Tier PCS' which transmits data through its own cell network without relying on the public telephone network (PSIN) like mobile phones. The other is the 'Low Tier PCS', which is achieved through the public telephone network.

In addition, in order to satisfy various needs of wireless subscribers, wireless paging network and CT2 service providers use voice mail service and automatic voice guidance system (ARS) in addition to existing wireless pager calling service. Providing. It satisfies subscribers' desire to promote communication service quality and promotes convenience, and provides convenience to existing wireless calling users through active provision of various communication services, and maximizes utilization of communication resources by utilizing existing wireless communication related facilities. In addition, it is possible to provide a more affordable and convenient service by actively utilizing the know-how (Know-How) of the network construction and operation maintenance of the wireless caller. As an extension of CT2 / wireless call-related supplementary services, MIA location tracking service, bus movement location indication service, proximity taxi call service, and stolen vehicle tracking service Various new value-added services can be created, and various application value-added services can be developed to overcome the unidirectionality of wireless calling and CT2. This is possible through location registration and release of the built-in wireless pager CT2 terminal, and further improved incoming call service combining CT2 and wireless call is possible. Therefore, by supporting all the additional services that can be supported in the wireless call network through the built-in wireless pager CT2 terminal, it is possible to implement various implementations of interworking services and inter-network interworking with the wireless call network. In addition, in order to provide mobile services to subscribers, the system must be able to determine the location of subscribers, and when the wireless call and CT2 operators need to obtain location information data of subscriber terminals, it is necessary to efficiently perform subscriber mobility management and service provision. have.

Therefore, the present invention is to provide a bidirectional service of the application value-added service and the incoming service using the location registration to the wireless call and the CT2 subscriber by registering and releasing the location of the pager built-in CT2 terminal using the wireless call network.

1 is a schematic diagram of a radio calling and CT2 system to which the method of the present invention is applied;

2 (A)-(D) is a format diagram of a POCSAG signal including a cap code and a message code word of a pager according to the present invention;

Figure 3 is a block diagram showing the configuration of a wireless pager built-in CT2 terminal for performing the method of the present invention,

Fig. 3A is a detailed functional block diagram of the CT2 terminal of Fig. 3;

4 is a flowchart showing a program for performing the method of the present invention in the CT2 terminal with built-in pager of FIG.

FIG. 5 is a flowchart of location registration and release of the CT2 terminal of FIG. 4.

* Description of the symbols for the main parts of the drawings *

1: base station 2: base station controller

3: CT2 input call switch 4: network management system

5: wireless call exchanger 6: wireless call exchange system

In order to achieve the above object, the present invention provides a method for receiving a radio call signal transmitted from a radio call system, detecting an address code corresponding to its own cap code, and a message codeword of the received radio call signal. Determining whether location registration or release command data is included in the step; and when the location registration or release command data is detected, the pager sends the command to CT2, and the CT2 terminal receiving the command Based on the location registration or release step.

In the step of registering or releasing a location, the CT2 terminal receiving the command requests a link to the base station, and the base station communicates with the base station controller and the network management system to grant a link to the CT2 terminal, and the CT2 terminal transmits its ID to the base station. Sending a signal for registration or release comprising a, the base station is made by sending a signal including the ID of the terminal and the ID of the base station to the network management system through the base station control device, which is CT2 / CAI (Cordless Telephone 2nd generation / Common) Air Interface) is performed based on the protocol. In order to distinguish between location registration and release, the message codeword of the POCSAG signal is used.

EXAMPLE

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic diagram showing a wireless call network and a CT2 network to which the method of the present invention is applied.

The wireless communication protocol described in the CT2 / CAI (Cordless Telephone 2nd Generation / Common Air Interface) standard is based on frequency division multiple access and allocates 40 channels to each 100KHz bandwidth. Each channel is used for communication. The configuration for this is as follows.

There is a base station 1 which receives a signal from the terminal via the terminal and the CT2 radio interface and also sends the signal to the base station controller 2. Interfaces between the base station 1 and the base station controller 2 are made via an interface U interface (BSC; for base station controller) or async. (BCU; for base controller unit). In addition, the base station controller 2 handles signaling with a public switched telephone network (PSTN), a base station, and a network management system 4.

In addition, there is a CT2 input call switch 3 connected to the PSTN to handle input calls. The input call is routed to the CT2 input call switch 3 and communication is established through the CT2 input call switch. In addition, the CT2 input call switch 3 is connected to the network management system 4 and the radio call exchanger 5 described later through a public switched data network (PDSN).

Meanwhile, the wireless communication service network adds related functions through interworking with the CT2 network to the existing wireless call network. In other words, through the PSDN, the main equipment of the network (base station controller (2) and CT2 input call switch (3)) is connected and remote control of network operation such as initialization, alarm, maintenance, software downloading, Network management system (4) for centralized management of services such as checks and user databases, authentication, billing, statistics, radio call exchangers (5) for transmitting radio call signals, and multiple distributed transmitters (Tx1). It consists of the existing radio call switching system 6 which has Txn).

Between the base station controller or CT2 input call switch and the network management system, the network using X.25 is interfaced with data line L between the PSDN, the network management system and the radio switching center.

2 illustrates a code format generated in the wireless call network and transmitted to a wireless pager built in a CT2 terminal.

Fig. 2 (A) shows a code format of a general wireless call signal (POCSAG), wherein a wireless pager built in a CT2 terminal is used to adjust word synchronization, and a preamble having a size of 576 bits or more in which binary 1s and 0s are repeated. The signal is followed by a batch signal consisting of a 32-bit sync codeword SC and eight frames FR0-FR7. Each frame consists of two codewords and each codeword consists of 32 bits. 2 (B) shows two codewords, namely, an address codeword and a message codeword. The address codeword is an 18-bit address represented by binary data of flag bits starting with binary 0 and 7-digit cap code, which is the ID number of the pager corresponding to the subscriber's calling number. Bit, followed by two functional bits, ten parity check bits, and one parity bit.

Fig. 2 (C) shows an example of the data structure of the above address codeword. When the cap code registered by the manufacturer of the wireless pager as a unique number is 114357, the wireless call system responds with the binary bit 011011 1110 1011. 0101 is transmitted as the address code assigned to the frame. Therefore, the pager determines whether the call is for itself by checking the address of the frame allocated to the pager. Two function bits are located following the upper 18 address bits. The function bits determine four subsequent message formats by a combination of two bits. In this example, the numeric message is divided into 0 and the text message is displayed as 11. In addition, 10 bits from bits 22 to 31 are parity bits, and bit 32 is an even parity bit, which is used for error detection and correction in the pager.

2 (D) shows an example of the configuration of a message codeword including second capcode registration and release data according to the present invention. This message codeword is arbitrarily designated by the wireless caller and the CT2 operator performing position registration prompt / release of the wireless pager built-in CT2 terminal as described above. Usually, the upper bits 2 to 21 are information bits, and the numeric message has 5 characters, and the text message sheet has a size capable of transmitting 2 and 6/7 (7 bits per character).

The numeric message format can consist of decimal numbers, including spaces, hyphens, square brackets, emergency symbols, and spares. That is, the information bits transmitted over three codewords in FIG. 2D represent binary numbers and symbols of four-bit combinations set by the service provider. For example, five consecutive [10]] or [01] are used as control data indicating whether to register or release the location of the CT2 terminal in the wireless pager built in the CT2. . In the figure, the idle code following the information bit is used to maintain the layout structure when transmitting the message, and this idle code is ignored when received at the pager.

3 is a block diagram showing a configuration of a wireless pager built-in CT2 terminal for processing a wireless call signal including the control data. In order to read and process the location registration and release message in the figure, the MPU, which is a microprocessor device in the pager, includes a ROM incorporating a separate control program for determining control command data. In addition, the entire system consisting of an RF receiver, a high frequency channel filter, an intermediate frequency filter, a demodulator, a decoder, an LCD display, a vibration panel, a system controller, and an EEPROM that backs up the capcode memory and reception messages of the pager is similar to the conventional one. That is, a well-known structure is employ | adopted. Therefore, detailed description is omitted.

Fig. 3A is a detailed functional block diagram of the CT2 terminal in which the control message of the interface between the pager and the CT2 terminal is described. The position registration and release processing routine of the CT2 terminal is coded to the microprocessor of the CT2 terminal by sending the position registration and release control data from the microprocessor of the wireless pager built in the CT2 terminal to the microprocessor of the CT2 terminal through the control data bus line. The program is performed according to CT2 / CAI.

Position registration and release operations in the CT2 terminal receiver with such a pager will be described with reference to the flowchart of FIG. 4.

First, in step S1, if the pager built in CT2 receives the radio call signal sent from the radio call system and detects an address code corresponding to its cap code, in step S2, the position registration and the received message code word are received. It is determined whether the release command data difference is included. Here, it is determined whether or not a data value corresponding to [10]] or [01] is received as the specified control command data as described above. In step S3, when the position registration or release command data is detected, the pager sends the detected command to CT2. CT2, having received the command through the internal control signal, performs position registration or release according to the command (S4).

The CT2 terminal forms a link with the base station 1 and the like prior to the location registration and release, which is shown in FIG.

That is, the CT2 terminal requests a link to the base station, and the base station reports the request to the network management system through the base station controller and gives a link to the CT2 terminal to form a link.

When the location is registered after the above link is established, the base station closest to the wireless pager built-in CT2 terminal processes the function of including the PID of the CT2 terminal. The base station assigns its own identification code (ID) to the PID information of the CT2 terminal. In addition, it is stored in the database of the network management system via the base station controller. Thus, the network management system identifies the location of the subscriber station and stores this information in the location database of the network management system. When an incoming call is confirmed, if the base station closest to the pager embedded CT2 terminal fails to page the terminal, it requests the base station adjacent to the nearest base station to pager. For each base station, the system can define up to five adjacent base station areas, which are recorded in the network management system's database. The procedure and processing for location registration and release of the built-in wireless pager built-in CT2 terminal for prompting and releasing location registration by the built-in wireless pager are performed based on the CT2 / CAI protocol.

On the other hand, if the message codeword received in step S2 does not include location registration and release command data, it is recognized in the same manner as general radio call and enters the normal radio call signal reception operation routine (S5).

As described above, according to the method of the present invention, the wireless caller and the CT2 service provider can remotely prompt and release the location registration of the wireless caller built-in CT2 terminal, thereby obtaining the location information data of the subscriber station if necessary. Subscriber mobility management and various application supplementary information services can be efficiently provided to subscribers.

Claims (3)

Detecting, by the pager, an address code corresponding to its cap code by receiving a radio call signal transmitted from the radio call system; Determining whether location registration or release command data is included in the message codeword of the received radio call signal; When the location registration or release command data is detected, the pager sending the command to CT2; CT2 terminal receiving the command position registration and release method of the built-in wireless pager-type CT2 terminal using a wireless call network consisting of the step of performing the position registration or release based on the command The method of claim 1, Registering or releasing location, The CT2 terminal receiving the command requests the link to the base station, and the base station communicates with the base station controller and the network management system to give the link to the CT2 terminal, CT2 terminal sends a signal for registration or release containing its ID, A base station registers and releases a location of a built-in wireless pager-based CT2 terminal based on the CT2 / CAI protocol comprising sending a signal including an ID of a terminal and an ID of a base station to a network management system through a base station controller. The method according to claim 1 or 2, A method of registering and releasing a location of a built-in wireless pager-type CT2 terminal using a wireless paging network, wherein the location registration or cancellation is performed using a message codeword of a POCSAG signal.