KR100594458B1 - Method for display of roaming state of mobile communication station - Google Patents

Abstract

According to an aspect of the present invention, there is provided a method for displaying roaming status of a mobile communication terminal, comprising: an eleventh step of performing a PRL search to determine whether a band class and a frequency of a found system match; A twelfth step of determining whether a wildcard subnet is used if the band class and the frequency match in the eleventh step; A thirteenth step of determining whether an association relationship with the 1x system is matched using the wildcard subnet in the twelfth step; If the association with the 1x system does not match in the thirteenth step, the method returns to the eleventh step. If the association with the 1x system is not used in the twelve steps or if the association with the lx system is matched in the thirteenth step, the roaming indicator is returned. By including the fourteenth step of displaying, it is possible to display the roaming state of the hybrid mobile communication terminal operating simultaneously in the 1X and EVDO.

Description

Method for displaying roaming state of mobile communication terminal {Method for display of roaming state of mobile communication station}

1 is a block diagram of a general mobile communication system,

2 is a flowchart illustrating a roaming state display method of a conventional mobile communication terminal.

3 is a flowchart illustrating a roaming state display method of a mobile communication terminal according to the present invention.

Explanation of symbols on the main parts of the drawings

10: exchanger (MSC / VLR) 20: HLR

30: PSTN 40: base station (BSC / BTS)

50: mobile communication terminal (MS)

The present invention relates to a roaming state display method of a mobile communication terminal, and in particular, roaming of a mobile communication terminal adapted to display a roaming state of a hybrid mobile communication terminal operating simultaneously in 1X and EVDO (Evolution Data Only). It relates to a status display method.

In general, a mobile communication system is a communication system that targets mobile devices such as people, cars, ships, trains, and airplanes, which includes key phone systems, mobile phones (mobile phones, vehicle phones), port phones, aircraft phones, and mobile phones. Trains, cruise ships, express buses), radio calling, radiotelephony, satellite mobile communication, amateur radio, and fishing service ships.

The mobile communication system includes an AMPS (Advanced Mobile Phone Service) system using an analog method, a Code Division Multiple Access (CDMA) system using a digital method, a Wideband Code Division Multiple Access (WCDMA), and a TDMA (Time). Division Multiple Access, Time Division Multiple Access (FDMA) system, Frequency Division Multiple Access (FDMA) system, Wireless Local Loop (WLL), CDMA2000-1x, IMT-2000 (International Mobile Telecommunication in the year 2000 , Global mobile communication (GSM) systems, and GSM (Global System for Mobile communication) systems.

Therefore, the mobile communication terminal is used in the above mobile communication system to receive a mobile communication service.

1 is a block diagram of a general mobile communication system.

Where reference number 10 is a mobile switching center / visitor location register (MSC / VLR), 20 is a home location register (HLR), 30 is a public switched telephone network (PSTN) 40 denotes a base station controller (BSC / BTS), and 50 denotes a mobile station (MS).

Thus, the MSC 10 performs an exchange function, and serves as a road and an intersection of all communication lines.

The HLR 20 is a database in which subscriber information is stored, and the VLR is a device that temporarily stores important subscriber information in order to prevent frequent HLR 20 inquiry.

The PSTN 30 refers to the entire telephone network used in a general home.

Thus, when a user calls a mobile communication terminal 50 of a mobile subscriber from a general home telephone, the home telephone signal is first connected to the PSTN 30 and then inputted to the switch 10 of the mobile communication operator using the telephone number. .

The exchange 10 of the mobile communication provider inquires whether the subscriber is a valid subscriber and the location of the subscriber to the HLR 20, and then transmits the information to the corresponding base station 40 to call the mobile communication terminal 50.

The location of the BSC and VLR in terms of systems may vary depending on the equipment manufacturer. For example, the BSC may be in the same spatial location as the MSC or may be in the BTS, which is the base station 40. The base station 40 means that the BSC and the BTS are combined.

WCDMA, on the other hand, is a 3rd generation (3G) technology to increase the data rate of GSM systems by using CDMA instead of TDMA. WCDMA becomes a DS (Digital Speed) mode in the 3G standard of the International Telecommunication Union (ITU), and includes a 1x multicarrier mode (1xMC) and a 3x multicarrier mode (3xMC). 1xMC (formerly known as CDMA2000) and 3xMC already provide an upgrade path to 3G for carriers using CDMA (CDMAOne).

In addition, CDMA2000 1x EV (Evolution) -DO (Data Only) is a dedicated protocol for packet data transmission that is completely different from the existing CDMA2000 wireless protocol, and is capable of up to 2.4Mbps when the maximum transmission rate is forward link. This has the advantage of making the most of the existing system by changing only the channel card part in the CDMA2000 base station.

The 1x EV has largely 1x EV-DO (Data Only) and 1x EV-DV (Data and Voice). 1x EV-DO is a packet data-only protocol, which means existing 1x EV. The 1x EV-DV, on the other hand, has recently been standardized and can use both high-speed packet data and voice simultaneously.

Here, the 1x system and the EVDO system may be used simultaneously as one hybrid mobile communication terminal.

2 is a flowchart illustrating a roaming state display method of a conventional mobile communication terminal.

As shown therein, a first step ST1 of requesting to read a roaming indicator of a DO (Data Only) system designated as a wildcard subnet in a preferred roaming list (PRL); After the first step, a step ST2 of transmitting a roaming indicator is performed.

In this case, roaming refers to the use of a mobile communication terminal by a subscriber of the mobile communication service outside the subscriber's mobile communication network in performing a mobile communication service. Roaming (service rights switch) to enable.

In addition, roaming service is to make a call to a system other than the registered exchange system.

That is, roaming may be referred to as mutual service provision, service right or subscription area takeover, and call right location registration.

Therefore, roaming services are available nationwide in countries such as the United States, and in Europe, when a subscriber of a mobile telecommunication service enters B, he confirms his entry in the local telecommunication network and notifies his mobile network of his whereabouts. Thereby making the call possible.

In addition, the PRL allows roaming in a mobile communication terminal. Thus, the PRL has a list of frequency bands of mobile communication terminals that can be used in various countries using cellular or PCS.

Subnet means ID (ID) of the network, and wild card subnet is fixed with ID of 0 and can represent all subnets.

Accordingly, conventionally, a roaming indicator read request of a DO system designated as a wildcard subnet in a PRL is made.

The roaming indicator is then read. Association relationships are not considered.

However, this conventional technology has the following problems.

That is, in the prior art, when a roaming indicator of a DO system designated as a wildcard subnet is read from a PRL, the roaming indicator of another system may be read by not considering the correlation.

There was also a limitation that roaming indicators for EVDO systems are not shown.

Accordingly, the present invention has been proposed to solve the above-mentioned general problems, and an object of the present invention is to display a roaming state of a mobile communication terminal capable of displaying a roaming state of a hybrid mobile communication terminal operating simultaneously in 1X and EVDO. To provide a method.

Roaming state display method of the mobile communication terminal according to an embodiment of the present invention to achieve the above object,

An eleventh step of performing a PRL search to determine whether the band class and the frequency of the searched system match; A twelfth step of determining whether a wildcard subnet is used if the band class and the frequency match in the eleventh step; A thirteenth step of determining whether an association relationship with the 1x system is matched using the wildcard subnet in the twelfth step; If the association with the 1x system does not match in the thirteenth step, the method returns to the eleventh step. If the association with the 1x system is not used in the twelve steps or if the association with the lx system is matched in the thirteenth step, the roaming indicator is returned. Including the fourteenth step of displaying, the technical configuration is characterized.

Hereinafter, an embodiment according to the present invention, a technical concept of a roaming state display method of a mobile communication terminal will be described with reference to the accompanying drawings.

3 is a flowchart illustrating a roaming state display method of a mobile communication terminal according to the present invention.

As shown therein, an eleventh step (ST11) (ST12) for performing a PRL search to determine whether a frequency is identical to a band class of the found system; A twelfth step (ST13) of determining whether to use a wildcard subnet when the band class and the frequency match in the eleventh step; A thirteenth step (ST14) of determining whether an association relationship with the 1x system is identical when the wildcard subnet is used in the twelfth step; If the association with the 1x system does not match in the thirteenth step, the method returns to the eleventh step. If the association with the 1x system is not used in the twelve steps or if the association with the lx system is matched in the thirteenth step, the roaming indicator is returned. A fourteenth step ST15 is performed.

In step 14, when the roaming indicator is displayed, if a system matching to a wild card subnet and a system matching to a non wild card subnet are found, the matching to a non-wild card subnet is performed. Prioritizing the system to bring roaming indicators.

The roaming status display method of the mobile communication terminal according to the present invention configured as described above will be described in detail with reference to the accompanying drawings.

First, the present invention is intended to display the roaming state of a hybrid mobile communication terminal operating simultaneously in 1X and EVDO.

The Roaming indicator can be read from the Preferred Roaming List (PRL) defined by the standard.The Roaming indicator reads the roaming indicator of the system by finding a system that matches the frequency, band class, and subnet defined in the PRL. do.

If there are multiple systems using wildcard subnets, there will be a problem of reading roaming indicators of other systems that match only frequency and band class.

Therefore, in the present invention, the accurate roaming indicator value is read using the point that the EVDO system is associated with the 1x system.

That is, the accurate roaming indicator value is read using the relevant information of the 1x system currently acquired.

To this end, a PRL search is performed (ST11) to determine whether the frequency of the band class (Band Class) of the searched system is identical (ST12).

If the band class and the frequency match, it is determined whether the wild card subnet is used (ST13).

At this time, if the wild card subnet is used, it is determined whether an association relationship with the 1x system is matched (ST14).

So if the association does not match the 1x system, the PRL is searched again to find the correct roaming indicator.

When the association with the 1x system is matched, an accurate indicator can be obtained by displaying a roaming indicator of a system having the same band class and frequency and using the wildcard subnet while matching the association with the 1x system (ST15).

It also displays roaming indicators if the discovered system does not use wildcard subnets.

Therefore, the roaming indicator of the system using the non-wildcard subnet while the band class and frequency match is displayed (ST15).

When displaying roaming indicators, if a system is matched to a wild card subnet and a system to be matched to a non wild card subnet is found, the system that matches the non-wild card subnet is given priority. Get the roaming indicator.

As described above, the present invention displays the roaming state of the hybrid mobile communication terminal operating simultaneously in 1X and EVDO.

Although the preferred embodiment of the present invention has been described above, the present invention may use various changes, modifications, and equivalents. It is clear that the present invention can be applied in the same manner by appropriately modifying the above embodiments. Accordingly, the above description does not limit the scope of the invention as defined by the limitations of the following claims.

As described above, the roaming state display method of the mobile communication terminal according to the present invention has an effect of accurately displaying the roaming state of the hybrid mobile communication terminal simultaneously operating in 1X and EVDO.

Claims (2)

An eleventh step of performing a PRL search to determine whether the band class and the frequency of the searched system match; A twelfth step of determining whether a wildcard subnet is used if the band class and the frequency match in the eleventh step; A thirteenth step of determining whether an association relationship with the 1x system is matched using the wildcard subnet in the twelfth step; If the association with the 1x system does not match in the thirteenth step, the method returns to the eleventh step. If the association with the 1x system is not used in the twelve steps or if the association with the lx system is matched in the thirteenth step, the roaming indicator is returned. Roaming status display method of a mobile communication terminal, characterized in that the step comprising the step of displaying. The method of claim 1, wherein the fourteenth step is When the roaming indicator is displayed, if a system matching the wildcard subnet and a system matching the non-wildcard subnet are found, the roaming indicator is obtained by giving priority to the system matching the non-wildcard subnet. Roaming state display method of the mobile communication terminal.

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