KR20050089346A - Method of switching multi-mode multi-band mobile communication terminal - Google Patents

Abstract

The present invention relates to a mode switching method of a multi-mode multi-band mobile communication terminal capable of minimizing communication disconnection and performing mutual mode switching between an asynchronous mobile communication network and a synchronous mobile communication network. Step 1, Step 2 of determining a preset parameter value to determine the mode switching to the monitored system information, Step 3 of starting the synchronous modem unit if it is determined that the parameter value is set to mode switching in step 2, and A method of switching from asynchronous mode to synchronous mode including four steps of switching to a synchronous mode after starting the modem section, a first step of retrieving base ID information from a synchronous mobile communication network, and the base ID information retrieved in advance for mode switching Step 2 for judging whether the designated mode change parameter is set and mode change When it is determined that the parameter is set, the method for switching from the synchronous mode to the asynchronous mode includes three steps of starting the asynchronous modem unit and four steps of switching to the asynchronous mode after starting the asynchronous modem unit, thereby minimizing communication disconnection. In addition, there is an effect that can switch between the asynchronous mobile communication network and the synchronous mobile communication mode.

Description

Mode switching method of multi-mode multi-band mobile communication terminal

The present invention relates to a mode switching method of a multimode-multiband terminal supporting both an asynchronous mobile communication network and a synchronous mobile communication network.

The mobile communication service has been continuously developed starting from the low-quality voice call-oriented first generation mobile communication service provided by the analog cellular Advanced Mobile Phone Service (AMPS), which has been in service since the late 1980s. In the second generation mobile communication service, enhanced voice call and low speed (14.4 Kbps) data service provided by digital cellular Global System for Mobile (GSM), Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), etc. are possible. It was. In addition, in the 2.5G mobile communication service, the PCS (Personal Communication Service), which can be used around the world in addition to securing the frequency in the GHz band, has been developed to enable improved voice call and low speed (144 Kbps) data service.

Mobile communication networks for mobile communication services up to the 2.5th generation include various types of communication such as a user terminal, a base station transmitter, a base station controller, a mobile switching center, a home location register (HLR), and a visitor location register (VLR). The equipment is installed.

The third generation mobile communication service is classified into asynchronous WCDMA system proposed by 3GPP (Generation Partnership Project) and synchronous CDMA-2000 system proposed by 3GPP2. In particular, the WCDMA system is a wireless protocol recommended by IMT-2000, and many telecommunication service providers around the world are providing or preparing to provide services.

WCDMA systems have a high call quality and use a spread spectrum method, which is suitable for transmitting a large amount of data. The WCDMA communication system adopts AMR (Adaptive Multi-Rate codec) with a transmission rate of 12.2 Kbps to 4.75 Kbps for voice coding, and supports high mobility enough to make a call even if the user moves at a speed of about 100 Km / h. . In addition, WCDMA communication is adopted by most countries, and 3GPP, which is composed of many organizations such as Korea, Europe, Japan, the United States, and China, is continuously developing technical specifications for WCDMA.

On the other hand, recently, due to the advantages of the WCDMA system described above, Korea, the United States, China, etc., which basically provide the CDMA-2000 service, which is a synchronous mobile communication network, have started to provide a WCDMA service by establishing a WCDMA network, an asynchronous mobile communication network. .

To this end, a mobile communication terminal supporting both a synchronous mobile network and an asynchronous mobile communication network is required, and a multimode-multiband mobile communication terminal has emerged.

Multimode includes synchronous mode and asynchronous mode, and the multiband includes second generation mobile communication service using a frequency band of 800 MHz, second generation mobile communication service using a frequency band of 800 MHz or 1.8 GHz, approximately 2 GHz A third generation mobile communication service using a frequency band and a fourth generation mobile communication service to be serviced in the future.

When the multi-mode multi-band mobile communication terminal moves from the overlay area of the asynchronous and synchronous mobile communication networks to the area of the synchronous mobile communication network, it is necessary to switch between the asynchronous mode and the synchronous mode. Since the modem for the connection to the synchronous mobile communication network was started after the call was disconnected from the asynchronous mobile communication network, the communication was disconnected because it took about 20 seconds or more during the mode switching.

Accordingly, in order to solve the above problems, the present invention provides a mode switching method of a multimode-multiband mobile communication terminal capable of minimizing communication disconnection and performing mutual mode switching between an asynchronous mobile communication network and a synchronous mobile communication network. There is a purpose.

Mode switching method of a multi-mode multi-band mobile communication terminal according to the present invention for achieving the above object, a mobile including an asynchronous modem for communication with an asynchronous mobile communication network and a synchronous modem for communication with a synchronous mobile communication network; In the asynchronous-concurrent mode switching method of a communication terminal, a first step of monitoring system information from the asynchronous mobile communication network, and a second step of determining a preset parameter value to determine the mode switching to the monitored system information; If it is determined in step 2 that the parameter value is set to the mode switching, characterized in that it comprises three steps of starting the synchronous modem unit, and four steps of switching to the synchronous mode after starting the synchronous modem unit.

In addition, the mode switching method of the multi-mode multi-band mobile communication terminal according to the present invention, a synchronous-asynchronous terminal of the mobile communication terminal comprising an asynchronous modem unit for communication with the asynchronous mobile communication network and the synchronous mobile communication network A mode switching method between the steps of: searching for base ID information from the synchronous mobile communication network; step 2 for determining whether a predetermined mode switching parameter is set for mode switching in the searched base ID information; If it is determined in step 2 that the mode switching parameter is set, the method includes three steps of starting the asynchronous modem unit and four steps of switching to the asynchronous mode after starting the asynchronous modem unit.

Hereinafter, with reference to the accompanying drawings to describe the present invention in detail.

1 is a block diagram illustrating a mobile communication network connection of a multi-mode multi-band mobile communication terminal according to the present invention.

Referring to FIG. 1, the WCDMA network 100, which is an asynchronous mobile communication network, includes a wireless station 101 that performs wireless communication with the mobile communication terminal 400 and a wireless station controller that controls the wireless station 101 (hereinafter, referred to as 'RNC'). 102, a Serving GPRS Service Node (hereinafter referred to as "SGSN") 103 connected to the RNC 102 to manage mobility of the mobile communication terminal 400, Asynchronous communication network data service gateway node (hereinafter referred to as 'GGSN') 106 which is a relay device for performing the packet service control and packet data transmission through the GPRS network 105 is included.

In addition, an exchanger (hereinafter referred to as 'MSC') 104 is connected to the RNC 102 to perform a call exchange, and the MSC 104 is a number seven signal network (No. 7 signal network) for signal exchange ( 107). The number seven signal network 107 has a short message service center (hereinafter referred to as SMSC) 108 for serving a short message, and a home location register (hereinafter referred to as 'HLR') for managing location information of subscribers. 109 is connected.

Meanwhile, the CDMA2000 network 200, which is a synchronous mobile communication network, includes a base station (hereinafter referred to as BTS) 201 that performs wireless communication with the mobile communication terminal 400, and a base station controller that controls the BTS 201. 202), a Packet Data Service Node (hereinafter referred to as PDSN) 204 connected to the BSC 202 to service packet data, and the PDSN 204. Data Core Network (hereinafter referred to as 'DCN') 208 that is connected to the Internet and performs an Internet access service, and an exchange that is connected to the BSC 202 to perform an exchange (hereinafter referred to as 'MSC'). 203).

The MSC 203 is connected with a number seven signal network (No. 7 signal network) 205 for signal exchange. The number seven signal network 205 includes a short message service center (hereinafter referred to as 'SMSC') 206 that serves a short message, and a home location register (hereinafter referred to as 'HLR') for managing location information of subscribers. 207 is connected.

In this embodiment, the synchronous network 200 and the asynchronous network 100 have HLRs 109 and 207 for managing subscriber information and location information, respectively, but use a single dual stack home location register (HLR). By doing so, the synchronization network 200 and the asynchronous network 100 may share subscriber information and location information.

2 is a block diagram illustrating a configuration of a multi-mode multi-band mobile communication terminal according to the present invention.

Referring to FIG. 2, the multi-mode multi-band mobile communication terminal 400 according to the present invention has a protocol stack for supporting both synchronous mobile communication and asynchronous mobile communication.

The mobile communication terminal 400 according to the present invention is broadly divided into an antenna 410 for transmitting and receiving radio waves with the synchronous mobile communication network 200 and the asynchronous mobile communication network 100, and a synchronous radio device 430 for synchronous communication. , Asynchronous radio 420 for asynchronous communication, and a common module 440 for providing common resources in synchronous and asynchronous communication.

The synchronous radio device 430 includes a synchronous radio transmitter 432 for radio transmission, a synchronous radio receiver 433 for radio reception, and a synchronous modem unit 434. The synchronous radio transmitter 432 and One side of the synchronous radio receiver 433 is connected to the antenna 410 through a duplexer 431, and the other side is connected to the synchronous modem unit 434.

In addition, the asynchronous radio device 420 also includes an asynchronous radio transmitter 422 for radio transmission, an asynchronous radio receiver 423 for radio reception, and an asynchronous modem unit 424. The asynchronous radio transmitter 422 and One side of the asynchronous radio receiver 423 is connected to the antenna 410 through the duplexer 421 and the other side is connected to the asynchronous modem unit 424.

3 is a block diagram illustrating a configuration of a common module of a multi-mode multi-band mobile communication terminal according to the present invention.

Referring to FIG. 3, the common module 440 of the multi-mode multi-band mobile communication terminal according to the present invention includes the modem units 424 and 434 of the synchronous radio 430 and the asynchronous radio 420. A plurality of dual port RAMs (hereinafter referred to as DPRAMs) 441 and 442 connected to the plurality of dual port RAMs (hereinafter referred to as DPRAMs) 441 and 442 and the DPRAM 441 and 442 which control the overall control of synchronous and asynchronous communication of the mobile communication terminal 400. And a main processor 443 performing application execution. The main processor 443 includes a memory 444 for storing data, an I / O device 445 for connecting a peripheral device, and a power control module (hereinafter referred to as 'PWM') 446 for power control. Connected.

The mobile communication terminal 400 having the above-described configuration may perform communication in an asynchronous mobile communication network and a synchronous mobile communication network, and asynchronous dedicated mode (WCDMA only), which performs communication only to an asynchronous mobile communication network according to a user setting, first asynchronous Asynchronous communication mode (WCDMA preferred), which performs mode switching for communication with a synchronous mobile communication network when it is out of the asynchronous mobile communication network and communicates with the synchronous mobile communication network, and moves to the asynchronous mobile communication network area. Upon entering, the communication mode may be set to one of a synchronous priority mode (CDMA preferred) and a synchronous only mode (CDMA only) for performing mode switching for communication with the asynchronous mobile communication network.

4 is an explanatory diagram for explaining a mode switch from the asynchronous mode to the synchronous mode of the multi-mode multi-band mobile communication terminal according to the present invention.

As shown in FIG. 4, the mobile communication terminal 400 in the area A of the asynchronous mobile communication network monitors a system information block (SIB) transmitted from the asynchronous communication network. The mobile communication terminal 400 moves to the boundary area B of the asynchronous mobile communication network and the synchronous mobile communication network, and determines whether the preset parameter value included in the system information is set to the synchronous network mode switching. When the parameter value is set to the synchronous network mode switching, the synchronous modem unit is activated, and the mobile communication terminal 400 immediately connects to the synchronous mobile communication network through the synchronous modem unit to perform the switching.

5 is a flowchart illustrating a mode switching method from an asynchronous mode to a synchronous mode of a multi-mode multi-band mobile communication terminal according to the present invention.

Referring to FIG. 5, the mobile communication terminal monitors system information block (SIB) of a cell transmitted from a wireless station of an asynchronous mobile communication network while performing cell selection (S10). In operation S20, it is determined whether the preset parameter value included in the monitored system information is set to the synchronization network mode switching.

If it is determined in step S20 that the preset parameter value included in the system information is set to the synchronous network mode switching, the mobile communication terminal determines whether the current terminal mode is the asynchronous priority mode (WCDMA Preferred) (S30). The asynchronous priority mode is a mode for first connecting to an asynchronous network and performing a synchronous network connection when the asynchronous network connection is not established.

If it is determined in step S30 that the terminal mode is set to the asynchronous priority mode, the mobile communication terminal is a country code (MCC) set in the country information (MCC) included in the system information is set in advance, for example, Korea It is set to (MCC = 450), and it is determined whether the network code (MNC; Mobile Network Code) is set to a preset network code (second parameter), for example, SK Telecom (MNC = 05) (S40). .

If it is determined in step S40 that the country code is set to the first parameter and the network code is set to the second parameter, the mobile communication terminal determines switching to the synchronous mode and starts the synchronous modem unit (S50). When the synchronous modem unit is activated, the mobile communication terminal switches the asynchronous mode, which is the current communication mode, to the synchronous mode (S60).

On the other hand, if the terminal mode is not set to the asynchronous priority mode in step S30, for example, in asynchronous dedicated mode (WCDMA only), even if the system information satisfies the conditions for mode switching without performing the mode switching The current asynchronous mode is maintained (S31).

In addition, even if the country code is not set to the first parameter or the network code is not set to the second parameter in step S40, even if the system information satisfies the conditions for mode switching, the current mode is not performed. Maintain the asynchronous mode (S31).

6 is an explanatory diagram for explaining mode switching from a synchronous mode to an asynchronous mode of a multi-mode multi-band mobile communication terminal according to the present invention.

As shown in FIG. 6, the mobile communication terminal 400 in the area C of the synchronous mobile communication network searches for base ID information transmitted from the synchronous communication network. The mobile communication terminal 400 determines whether a mode switching parameter is set in the base ID information while moving to the boundary area B of the synchronous mobile communication network and the asynchronous mobile communication network.

In this case, the mode switching parameter is set to bits in a preset order (second bit from the most significant bit in the present embodiment) from the most significant bit (MSB) of the base ID, and the area in which the areas of the asynchronous mobile communication network and the synchronous mobile communication network are overlaid. This parameter informs.

If it is determined that the mode switching parameter is set, the asynchronous modem unit is activated to prepare for the switching to the asynchronous mobile communication network.

At this time, when the asynchronous modem unit is activated and enters the area A of the asynchronous mobile communication network, the mobile communication terminal 400 immediately connects to the asynchronous mobile communication network through the asynchronous modem unit and performs mode switching.

7 is a flowchart illustrating a mode switching method from a synchronous mode to an asynchronous mode of a multi-mode multi-band mobile communication terminal according to the present invention.

Referring to FIG. 7, a mobile communication terminal performing communication in a synchronous mobile communication network searches for base ID information of a synchronous network BSC (S110). In operation S120, it is determined whether a preset mode switching parameter is set in the base ID information found in operation S110.

If it is determined in step S120 that the preset mode switching parameter is set in the base ID information, the mobile communication terminal determines whether the current terminal mode is set to asynchronous preferred mode (WCDMA preferred) or synchronous preferred mode (CDMA preferred). (S130). The asynchronous priority mode is a mode for first connecting to an asynchronous network and performing a synchronous network connection when the asynchronous network connection is not established. The synchronous priority mode is a mode for first connecting to a synchronous network and performing an asynchronous network connection when the synchronous network is not connected.

If it is determined in step S130 that the terminal mode is set to the asynchronous priority mode or the synchronous priority mode, the mobile communication terminal determines to switch to the asynchronous mode and starts the asynchronous modem unit (S140). The synchronous mode, which is the current communication mode, is switched to the asynchronous mode (S150).

On the other hand, if the terminal mode is not the asynchronous priority mode or the synchronous priority mode in step S130 and the synchronous only mode (CDMA only), the current synchronous mode is maintained without performing mode switching (S131).

The present invention described above, those skilled in the art will understand that the present invention can be implemented in other specific forms without changing the technical spirit or essential features. Therefore, the embodiments described above are to be understood as illustrative and not restrictive in all aspects. The scope of the present invention is shown by the following claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. do.

As described in detail above, according to the mode switching method of the multi-mode multi-band mobile communication terminal according to the present invention, it is possible to minimize the communication disconnection when moving the area between the asynchronous mobile communication network and the synchronous mobile communication network, There is an effect that can perform mutual mode switching.

1 is a block diagram illustrating a mobile communication network connection of a multi-mode multi-band mobile communication terminal according to the present invention;

2 is a block diagram for explaining the configuration of a multi-mode multi-band mobile communication terminal according to the present invention;

3 is a block diagram illustrating a configuration of a common module of a multi-mode multi-band mobile communication terminal according to the present invention;

4 is an explanatory diagram for explaining a concept of mode switching from asynchronous mode to synchronous mode of a multi-mode multi-band mobile communication terminal according to the present invention;

5 is a flowchart illustrating a mode switching method from an asynchronous mode to a synchronous mode of a multi-mode multi-band mobile communication terminal according to the present invention;

6 is an explanatory diagram for explaining a concept of mode switching from a synchronous mode to an asynchronous mode of a multi-mode multi-band mobile communication terminal according to the present invention;

7 is a flowchart illustrating a mode switching method from a synchronous mode to an asynchronous mode of a multi-mode multi-band mobile communication terminal according to the present invention.

<Brief description of the main parts of the drawings>

100: asynchronous mobile communication network 200: synchronous mobile communication network

400: mobile communication terminal 410: antenna

420: asynchronous wireless device 430: synchronous wireless device

440: common module 443: main processor

Claims (6)

In the asynchronous-concurrent mode switching method of a mobile communication terminal comprising an asynchronous modem unit for communicating with an asynchronous mobile communication network and a synchronous modem unit for communicating with a synchronous mobile communication network, Monitoring system information from the asynchronous mobile communication network; Determining a preset parameter value in order to determine a mode change in the monitored system information; In step 2, if it is determined that the parameter value is set to mode switching, step 3 for activating the synchronous modem unit; And switching to a synchronous mode after starting the synchronous modem unit. 4. The method of claim 1, The step 3 further includes a setting mode determination step of determining a current communication mode setting state of the mobile communication terminal, And a method for switching a mode of the multi-mode multi-band mobile communication terminal according to the determination result of the setting mode determining step. The method of claim 2, In the third step, when the communication mode setting state is the asynchronous priority mode, the first parameter representing the country code of the home country and the network code included in the system information are preset and the network code of the company's network is preset. And further comprising a code judging step of determining whether or not the parameter matches In the code judging step, if the country code included in the system information matches the first parameter and the network code matches the second parameter, the synchronous modem unit is activated. How to switch modes. In the mode switching method of the synchronous-asynchronous period of a mobile communication terminal comprising an asynchronous modem unit for communication with the asynchronous mobile communication network and a synchronous modem unit for communication with the synchronous mobile communication network, Retrieving base ID information from the synchronous mobile communication network; Determining whether a predetermined mode switching parameter is set for mode switching in the searched base ID information; Step 3 of starting the asynchronous modem unit when it is determined in step 2 that the mode switching parameter is set; And switching to asynchronous mode after starting the asynchronous modem unit. The method of claim 4, wherein The mode switching parameter is set to bits in a predetermined order from the most significant bit of the base ID, and is a parameter for notifying a region in which areas of an asynchronous mobile communication network and a synchronous mobile communication network are overlaid. Mode switching method of the terminal. The method of claim 4, wherein The step 3 further includes a setting mode determination step of determining a current communication mode setting state of the mobile communication terminal, And activating the synchronous modem unit when the communication mode setting state is an asynchronous priority mode or a synchronous priority mode as a result of the determination of the setting mode determination step.