KR100548615B1 - Method for serving CDMA2000 and WCDMA service on the mobile communication device - Google Patents

Abstract

The present invention relates to a method for simultaneously providing a service of CDMA2000 and WCDMA in a mobile communication terminal, and has an object of enabling one mobile communication terminal to simultaneously use different protocols, CDMA2000 and WCDMA. To this end, the mobile communication terminal includes a CDMA2000 driver supporting the CDMA2000 protocol, a WCDMA driver supporting the WCDMA protocol, and a multimedia DSP driver connected to the two drivers to exchange data and support a multimedia protocol. When the power is applied by the above configuration, the mobile communication terminal can access the CDMA2000 and the WCDMA service network by implementing the steps performed by the CDMA2000 driver, the steps performed by the WCDMA driver, and the steps performed by the multimedia DSP driver. Therefore, according to the present invention, by simultaneously supporting the CDMA2000 and WCDMA protocols, there is an effect of providing a mobile communication service of better quality.

Mobile terminal, mobile phone, CDMA, WCDMA, protocol

Description

Method for serving CDMA2000 and WDMDMA services simultaneously in mobile communication terminal {Method for serving CDMA2000 and WCDMA service on the mobile communication device}             

1 is a view showing the internal configuration of a general mobile communication terminal.

FIG. 2 is a block diagram of a driving unit for driving a chip, which is a main component of a mobile communication terminal, and a module according to the present invention.

3 is a flowchart illustrating a process of processing by a CDMA2000 driver according to the present invention.

4 is a flowchart illustrating a process of processing in a multimedia DSP driver according to the present invention.

5 is a flowchart illustrating a process performed by a wideband CDMA (WCDMA) driver according to the present invention.

The present invention relates to a method for simultaneously providing services of CDMA2000 and WCDMA in a mobile communication terminal, and more particularly, a modem chip supporting the CDMA2000 protocol, a modem chip supporting the WCDMA protocol, and a multimedia protocol. The present invention relates to a method for simultaneously supporting dual mode, that is, CDMA2000 and WCDMA protocols, in a single mobile communication terminal having a DSP chip.

In the mobile communication network (DCN, PCS) corresponding to the second generation mobile communication in the prior art, only a single service can be provided to one mobile station, and a mobile communication terminal model for call processing for providing a service can also handle only a single service. Configured. After the second generation mobile communication network, the third generation mobile communication network has appeared. This third generation mobile communication network supports a multimedia environment, and it is possible to additionally use new services without interruption of the service being used by subscribers, that is, multiple services (eg voice, fax, packet data service, video, etc.). ), So that it can be provided. Third generation mobile communication systems include North America-centric CDMA2000 and WCDMA.

CDMA2000 is composed of a 1x version using a bandwidth of 1.25MHz and a 3x version tripled so that 1x and 3x versions can coexist in the same system. WCDMA ranges from 5 MHz to 10 MHz and employs 32 Kbps Adaptive Differential Pulse Code Modulation (ADPCM) for voice coding.

By the way, the mobile communication terminals presently employ only one of CDMA2000 and WCDMA, and a method for supporting both protocols has not been proposed.

The present invention has been made to solve the problems posed by the prior art, and an object thereof is to enable a user to simultaneously use different protocols CDMA2000 and WCDMA service in one mobile communication terminal.

The present invention provides a method for simultaneously providing services of CDMA2000 and WCDMA in a mobile communication terminal. To this end, the mobile communication terminal includes a CDMA2000 driver supporting the CDMA2000 protocol, a WCDMA driver supporting the WCDMA protocol, and a multimedia DSP driver connected to the two drivers to exchange data and support a multimedia protocol. Control unit that performs various functions and processes data and signals, selection buttons for selecting menus, numeric key buttons used for input and output, and general buttons to control user commands A keypad for transmitting to the terminal, a display unit for displaying various menu screens selected by the user of the mobile communication terminal, an execution screen and a result screen, and a variable and data of a real-time processing operating system and a program. On the processor The memory unit stores the interface handler module, the modem activation module, the message dispatcher module residing in the processor of the CDMA2000 driver, the RAT selection timer setting module residing in the processor of the CDMA2000 driver, and the software that performs the call processing. An audio converter converts the analog voice input from the microphone to digital data by processing the data received from the speaker and transmits the analog voice to the digital data, and a wireless circuit unit for transmitting and receiving data to and from the base station and transmitting the same to the controller. Is provided. In addition, the mobile communication terminal includes a step performed by the CDMA2000 driver, a step performed by the WCDMA driver, and a step performed by the multimedia DSP driver to implement a method of simultaneously providing the services of the CDMA2000 and the WCDMA. Accordingly, the mobile communication terminal user can use the service by accessing the CDMA2000 and WCDMA service networks with one terminal.

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

1 is a view showing the internal configuration of a general mobile communication terminal.

Usually, the internal configuration diagram of a general mobile communication terminal includes components such as a controller 100, a keypad 110, a display 120, a memory 130, an audio converter 140, and a wireless circuit unit 150. do. The following describes what operations each component of the mobile communication terminal having such a structure performs.

The controller 100 performs various functions of the mobile communication terminal and processes data and signals. In the present invention, a modem chip supporting the CDMA2000 protocol, a modem chip supporting the WCDMA protocol, and a DSP chip for exchanging data with the two modem chips and supporting a multimedia protocol are provided. This is described in more detail in the part of FIG. 2.

The keypad 110 includes a selection button for creating and storing a short message or selecting a menu in the mobile communication terminal, a numeric key button used as an input and an output, and a general button, and controls a user's instruction. It plays the role of a medium to transmit to 100).

The display 120 displays various menu screens selected by the mobile communication terminal user, execution screens, and result screens under the control of the controller 100.

The memory unit 130 stores a program for driving a function processed by the controller 100, a predetermined program for implementing convenience and basic functions of a user, and the like. Elements constituting such a memory unit generally include flash memory, random access memory (RAM), read only memory (ROM), and the like. The dual flash memory stores a basic real time operating system (OS) and call processing software of a mobile communication terminal, and the variables and states of these programs are read from the RAM and operated. In addition, the ROM is configured as an electrically erasable programmable read only memory (EEPROM), stores nonvolatile data that can be electrically erased or restored, and performs input / output according to a command of a controller. The data stored in these ROMs include NAM (number assignment module) parameters that can be used semi-permanently without being erased, and other storage data (phone number and name, text message, video, etc.). In addition, the flash memory is a non-volatile memory that has a high processing speed and data is preserved. When the software of the mobile communication terminal is upgraded, new software is stored in this part.

The audio converter 140 processes the voice recorded by the user of the mobile communication terminal through the data as data and transmits it to the controller 100 or processes the data received from the outside to output analog voice through the speaker. In charge of.

The radio circuit unit 150 is composed of a radio frequency (RF) and a baseband processor, and transmits and receives data to and from the base station and transmits the data to the control unit 100 or transmits data stored in the storage unit to the antenna. Sends the call to the caller's phone.

In the present invention, only the above components are described, but the present invention is not limited thereto, and a component may be further provided to implement additional functions such as a video call.

FIG. 2 is a block diagram of a driving unit for driving a chip, which is a main component of a mobile communication terminal, and a module according to the present invention.

In order to implement the present invention, the CDMA2000 driver 220 supporting the CDMA2000 protocol, the WCDMA driver 230 supporting the WCDMA protocol, and the multimedia data exchanged with the two drivers are supported in the control unit of the mobile communication terminal. It consists of a DSP driver 210, etc., the interface 201, 202 is configured for the connection between them.

Also, these drivers are configured with related modules. That is, the module related to the multimedia DSP driver 210 includes the interface handler module 211 and the modem activation module 212. The module associated with the CDMA2000 driver 220 includes the message dispatcher module 221. ) Is a RAT selection timer setting module 231. The role of the above-described modules is as follows.

The interface handler module 211 is a module resident in the processor of the multimedia DSP driver, and is responsible for the interface between the modem chip of each driver 220 and 230 and the multimedia DSP processor. In addition, various functions are performed, and input and output events are handled, and these events are described as follows.

A) Input Event

1) Success / failure event for the mobile communication terminal acquiring the WCDMA system from the WCDMA driver 230

2) RAT selection timer validity event

3) an event for out of service from the WCDMA driver 230

B) Output event

1) An event for outputting the success / failure event for acquiring the WCDMA system received from the WCDMA driver 230 to the CDMA2000 driver.

2) Event of powering on the WCDMA driver to the modem activation module 212 after the internal processing of the RAT selection timer validity event.

3) Event of applying power to the CDMA2000 driver to the modem activation module 212 after processing an event for service availability (out of service) received from the WCDMA driver 230.

Modem Activation Module 212: A module resident in the processor of the multimedia DSP driver, and serves to apply power to the CDMA2000 driver 220 and the WCDMA driver 230.

Message dispatcher module 221: A module residing in the modem chip of the CDMA2000 driver 220 serves to process an event for success / failure for acquiring a WCDMA system received from the processor of the multimedia DSP driver. Upon receiving an event for success, the mobile communication terminal performs a normal power off protocol procedure to the CDMA2000 network, and then powers off the CDMA2000 driver 220. On the contrary, upon receiving the event of failure, the mobile communication terminal continues the synchronization acquisition process of the CDMA2000 system.

RAT selection timer setting module 231: A module residing in the modem chip of the CDMA2000 driver 220, after successfully acquiring synchronization of the CDMA2000 system and receiving an overhead message (OHM), the current user equipment. Is located in the WCDMA service, the RAT selection timer is set. If the time of this RAT selection timer becomes invalid, the setting module transmits the corresponding event to the interface handler module 211.

Some of the terms described above will be described below.

OHM: A message defined in CDMA2000 that broadcasts information about a system to all mobile terminals. The present invention has been described under the assumption that information on the coverage of the WCDMA network exists in the content of the OHM. However, even if this is not supported in the mobile communication network, other methods can be substituted.

RAT selection timer: This timer allows the mobile communication terminal to access the WCDMA network periodically while performing CDMA2000 services. However, this timer is set only when it is determined by the OHM that the current mobile communication terminal exists in the WCDMA service. Otherwise, the timer is not used unless the WCDMA service exists.

3 is a flowchart illustrating a process of processing by a CDMA2000 driver according to the present invention.

When power is applied to the mobile communication terminal, the mobile communication terminal supplies power to the CDMA2000 driver 220 (step S301). When power is applied, the mobile communication terminal proceeds with the initialization process, forms a state (parameter) necessary for operation on the memory of the terminal, reads the corresponding information from the EEPROM in the memory unit, and sets necessary system information (step S302). .

When the mobile communication terminal reads parameters necessary for its operation from the EEPROM of the memory unit and sets a value necessary for its own hardware, the mobile terminal performs an operation for acquiring a pilot channel (step S303).

In order to acquire a pilot channel, the mobile communication terminal performs a pilot channel search process. This pilot channel search is a process of matching a bit pattern of a pilot channel signal periodically transmitted from a base station with a bit pattern generated by a terminal. If the mobile communication terminal finds a pilot channel within a certain time, the mobile terminal proceeds to the step of acquiring a sync channel. If not, the system starts again from system initialization (step S304). When the pilot channel is successfully found and the sink channel is received, the mobile communication terminal receives system information from this time to perform timing change and displays the current time received from the synchronization channel through the display unit. (Step S305). The timing change is a terminal giving a time offset for receiving a message of a synchronization channel.

When the timing change process is performed, the mobile communication terminal receives an overhead message OMM (step S306).

The mobile communication terminal receives the necessary information on the synchronization channel, receives the overhead message, and then proceeds to an idle state for performing an appropriate response to various request messages (step S307). The mobile communication terminal establishes a condition for providing various services such as voice communication internally in such a standby state, and then receives a call or processes a control signal.

In this standby mode, the mobile communication terminal checks whether the WCDMA network exists, that is, whether the terminal is located in the WCDMA service network (step S310). If the mobile communication terminal is not in service at this WCDMA network confirmation step, an event for turning off the power of the WCDMA driver is sent to the interface handler module 211 (step S340).

Alternatively, if the mobile communication terminal is located in the service of the WCDMA network, the mobile communication terminal drives the RAT selection timer (step S320).

As the RAT selection timer is driven, the mobile communication terminal periodically accesses the WCDMA network. In this timer driving state, the mobile communication terminal checks whether the time set in the timer has elapsed (step S330). If the timer has not passed the set time, the mobile communication terminal continues to drive the RAT selection timer. On the contrary, if the timer has elapsed, the mobile communication terminal transmits an event for turning off the power of the WCDMA driver 230 to the interface handler module 211 (step S340).

4 is a flowchart illustrating a process of processing in a multimedia DSP driver according to the present invention.

As power is supplied to the mobile communication terminal, the mobile communication terminal supplies power to the multimedia DSP driver 210, the CDMA2000 driver 220, and the WCDMA driver 230. Accordingly, the interface handler module 211 and the modem activation module 212 resident in the processor of the multimedia DSP driver operate.

The interface handler module 211 receives an event generated from the WCDMA driver and the CDMA2000 driver (step S410). Types of such events have been described with reference to FIG. 2.

When an event is transmitted from the dual WCDMA driver, the interface handler module 211 reports a success or failure event to the message dispatcher module residing in the processor of the CDMA20000 driver (step S420). Which processing step the event transmitted from the WCDMA driver takes is described in more detail in FIG.

With respect to the reported event, it is determined whether the message dispatcher module is a success event or a failure event (step S430).

As a result of the event determination, if the event is a success event, the mobile communication terminal turns off the power of the CDMA2000 driver and registers the current position of the terminal (step S431). That is, the CDMA2000 modem will not work.

In contrast, if the event is a failure event, the mobile communication terminal turns off the power of the WCDMA driver (step S432). Therefore, the mobile communication terminal continues the steps described in FIG.

5 is a flowchart illustrating a process performed by a wideband CDMA (WCDMA) driver according to the present invention.

As power is supplied to the mobile communication terminal, the mobile communication terminal applies power to the WCDMA driver (step S501). As the power is applied, the mobile communication terminal checks whether the power is successfully applied (step S502). As a result of the check, if the power-up fails, a failure event is transmitted to the interface handler module (step S503). When the failure event is transmitted, the mobile communication terminal turns off the power of the WCDMA driver.

If the power is successfully applied, the mobile communication terminal performs a PLMN selection procedure (step S510). PLMN stands for public land mobile network. There are automatic and manual modes for PLMN selection. The automatic mode is a method of performing PLMN selection according to a predetermined order of the mobile communication terminal itself, whereas the manual mode provides a list of selectable PLMNs to the user and selects the user. That is, the PLMN selection procedure is a process of selecting which communication system the mobile communication terminal first selects. If the PLMN selection procedure fails, the mobile communication terminal reports a failure event (step S503). When the failure event is transmitted, the mobile communication terminal turns off the power of the WCDMA driver.

If the PLMN selection procedure is successfully performed, the mobile communication terminal performs slot synchronization (step S511). This is a process in which the mobile terminal synchronizes slots (1 slot is usually 0.6666 milliseconds) with the base station. The terminal acquires the slot synchronization of the base station using the primary synchronization code of the synchronization channel. . Since the primary synchronization code uses only one code in common for all base stations, the mobile communication terminal can easily acquire slot synchronization even when entering any base station.

If slot synchronization is in progress, the mobile communication terminal checks whether slot synchronization is successful (step S513). If the synchronization fails, the mobile communication terminal reports a failure event (step S503). When the failure event is transmitted, the mobile communication terminal turns off the power of the WCDMA driver.

If slot synchronization is performed, the mobile terminal performs frame synchronization and code-group identification (step S514). It manages several of the neighboring base stations together. Once the group type is identified, the scrambling code belonging to the group can be found in a short time. In addition, one frame usually consists of 15 slots. In this process, the starting point of one frame is found.

When frame synchronization and code-group authentication are performed, the mobile terminal checks whether frame synchronization and code-group authentication are successful (step S515). As a result of the verification, if authentication fails, the mobile communication terminal reports a failure event for this (step S503). When the failure event is transmitted, the mobile communication terminal turns off the power of the WCDMA driver.

If frame synchronization and code-group authentication are made, the mobile communication terminal performs scrambling-code identification (step S516). This is the process of finding the scrambling code (which is responsible for distinguishing base stations) having the maximum energy in the scrambling-code group. When this process is completed, the mobile communication terminal is able to read the system parameters.

If scrambling-code authentication is in progress, the mobile communication terminal determines whether scrambling-code authentication is successful (step S517). As a result of the verification, if authentication fails, the mobile communication terminal reports a failure event for this (step S503). When the failure event is transmitted, the mobile communication terminal turns off the power of the WCDMA driver.

When the scrambling-code authentication process is performed, the mobile communication terminal receives a system information message required by the mobile communication terminal from the base station (step S518).

Upon receiving the system information message, the mobile communication terminal checks whether the system information message has been successfully transmitted (step S519). As a result of the check, if the transmission of the system information message is not successful, the mobile communication terminal reports a failure event for this (step S503). When the failure event is transmitted, the mobile communication terminal turns off the power of the WCDMA driver.

On the contrary, when the system information message is transmitted, the mobile communication terminal notifies the interface handler module of the success event (step S520).

As the system information message is successfully performed, the mobile communication terminal performs an appropriate response to various request messages and performs an idle state for performing call processing (step S530).

While performing call processing in the WCDMA mode, the mobile communication terminal checks whether the WCDMA service is still being provided (step S540). When the service is provided, the mobile terminal performs call processing.

On the contrary, if the service is not provided in the service provision, the mobile communication terminal reports an event for WCDMA service out of service to the interface handler module 211 in the multimedia DSP driver (step S550). Accordingly, the mobile communication terminal turns off the power of the WCDMA driver and applies the power of the CDMA2000 driver, as described with reference to FIG. 4.

As mentioned above, the present invention has been described in detail with reference to the accompanying embodiments and drawings, but the present invention is not limited to the specific embodiments, and those skilled in the art or acquiring general knowledge are provided with the contents of the present invention. It will be understood that numerous modifications and variations are possible without departing from the scope of the invention. Accordingly, the protection scope of the present invention should be defined based on the appended claims.

According to the present invention, a mobile terminal has a modem chip that supports the CDMA2000 protocol, a modem chip that supports the WCDMA protocol, and a DSP chip that supports the multimedia protocol to support both the CDMA2000 and WCDMA protocols simultaneously. There is an effect of providing a quality mobile communication service.

Claims (15)

delete delete delete delete CDMA2000 and WCDMA in a mobile communication terminal having a CDMA2000 driver supporting the CDMA2000 protocol, a WCDMA driver supporting the WCDMA protocol, and a multimedia DSP driver connected to the two drivers to exchange data and support multimedia protocols. In the method of providing the service at the same time, When power is supplied to the mobile communication terminal, power is supplied to the CDMA2000 driver and the WCDMA driver, and the interface handler module and the modem activation module residing in the processor of the multimedia DSP driver operate so that the interface handler module receives events generated from the WCDMA driver and the CDMA2000 driver. Receiving; If an event is transmitted from the WCDMA driver, a success or failure event is reported from the interface handler module to the message dispatcher module residing in the processor of the CDMA2000 driver, and if the event from the WCDMA driver is a success event, the mobile communication terminal powers the CDMA2000 driver. Turn off, and if the failure event, the mobile communication terminal continues the synchronization acquisition process of the CDMA2000 system and powers off the WCDMA driver; In the CDMA standby mode, the mobile communication terminal checks whether the terminal is located in the WCDMA service network, and periodically connects to the WCDMA network when the mobile communication terminal is located in the service network of the WCDMA network. A method for simultaneously providing services of CDMA2000 and WCDMA in a mobile communication terminal comprising a.  The method of claim 5, In the input event transmitted from the WCDMA driver Success / failure events for the WCDMA system acquisition of the mobile communication terminal; RAT selection timer validity event, A method for simultaneously providing services of CDMA2000 and WCDMA in a mobile communication terminal, characterized in that a WCDMA service validity event is included. The method of claim 5, The output event sent from the interface handler module to the message dispatcher module  An event for outputting a success / failure event for acquiring a WCDMA system to the CDMA2000 driver; An event in which the WCDMA driver is powered on by the modem activation module after the internal processing of the RAT selection timer validity event; A method of simultaneously providing services of CDMA2000 and WCDMA in a mobile communication terminal, characterized in that an event of powering on the CDMA2000 driver by a modem activation module after processing an event of service availability received from the WCDMA driver is included. The WCDMA driver of claim 5, wherein the power is supplied to the WCDMA driver. Performing a PLMN selection procedure to select a communication system, If the selection process fails in the PLMN selection procedure, the mobile communication terminal reports a failure event; otherwise, if the PLMN selection procedure is successfully performed, performing slot synchronization; As the slot synchronization proceeds, checking whether the slot synchronization is successful, reporting a failure event when the slot synchronization fails, and conversely, performing frame synchronization and code-group authentication when the slot synchronization is successful. , As the frame synchronization and code-group authentication proceed, the frame synchronization and code-group authentication are checked whether the authentication is successful, and if the authentication fails, a failure event is reported. If the authentication is successful, the scrambling-code authentication is performed. Performing the step, As the scrambling-code authentication proceeds, it is determined whether the scrambling-code authentication succeeds, and reports a failure event when the authentication fails, and conversely, if the scrambling-code authentication process is successful, the mobile communication terminal from the base station Receiving system information messages as needed; As the system information message is received, the system information message is transmitted successfully. If the system information message is not successfully transmitted, a failure event is reported. Otherwise, the system information message is successfully transmitted. If not, notify the interface handler module of the success event, In response to the success event notification, performing an appropriate response to various request messages and performing a waiting state for processing a call. And simultaneously providing the services of the CDMA2000 and the WCDMA in the mobile communication terminal. delete The method of claim 8, Verifying that WCDMA service is still being provided while performing call processing in WCDMA mode, If the WCDMA service is not provided, the WCDMA driver reports an event on whether the WCDMA service is valid to the interface handler module in the multimedia DSP driver; As the validity event is reported, the mobile terminal turning off the power of the WCDMA driver and applying power to the CDMA2000 driver; A method for simultaneously providing services of CDMA2000 and WCDMA in a mobile communication terminal further comprising. delete A method of simultaneously providing CDMA2000 and WCDMA services in a mobile communication terminal having a CDMA2000 driver supporting a CDMA2000 protocol and a WCDMA driver supporting a WCDMA protocol, A first step of applying power to the CDMA2000 driver and the WCDMA driver when power is supplied to the mobile communication terminal so as to attempt acquisition of the WCDMA system and acquisition of the CDMA system, respectively; A second step of turning off the power of the CDMA2000 driver when the WCDMA driver successfully acquires the WCDMA system; A third step of turning off the power of the WCDMA driver when the WCDMA driver fails to acquire the WCDMA system; A fourth step of checking whether or not the WCDMA service is still provided when the CDMA2000 driver is turned off; As a result of the checking in the fourth step, if the WCDMA service is not provided, the fifth step of turning off the power of the WCDMA driver and applying the power of the CDMA2000 driver; A method for simultaneously providing services of CDMA2000 and WCDMA in a mobile communication terminal having a. The method of claim 12, In the mobile communication terminal, the WCDMA driver determines that the acquisition of the WCDMA system fails when any one of the PLMN selection procedure, slot synchronization, frame synchronization and code group authentication, scrambling code authentication, and system information message transmission fails. How to provide services of CDMA2000 and WCDMA at the same time. delete The method of claim 12, A sixth step of checking whether the mobile communication terminal is located in the WCDMA network when the WCDMA driver is turned off; As a result of the checking in the sixth step, when the mobile communication terminal is located in the WCDMA network, the seventh step of periodically accessing the WCDMA network A method for simultaneously providing services of CDMA2000 and WCDMA in a mobile communication terminal further comprising.

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