KR100989728B1 - Mobile terminal and wireless network access control method - Google Patents

Abstract

The present invention relates to a method for reducing power consumption by controlling a wireless network connection of a mobile terminal in a communication system interworking a wireless network and a mobile communication network, and a mobile terminal having the same, a wireless internet module for wireless LAN or wireless internet access. The mobile communication module receives a wake-up message WAKEUP_WLAN transmitted from a specific node of a mobile communication network. When the wake-up message WAKEUP_WLAN is received through the mobile communication module, the wireless Internet module is powered on to receive traffic. Comprising a control unit for powering off the wireless Internet module when the reception of the traffic is completed.

Description

MOBILE TERMINAL AND ITS CONTROL METHOD FOR RADIO NETWORK CONNECTION}

The present invention relates to a method for reducing power consumption by controlling a wireless network connection of a mobile terminal in a communication system interworking a wireless network and a mobile communication network, and a mobile terminal having the same.

The conventional wireless terminal capable of accessing a wireless LAN reduces power consumption of the mobile terminal by stopping the operation of the wireless Internet module when there is no data transmission and reception.

Regarding a method of reducing power consumption in the above manner, the conventional techniques 1 (Wake on Wireless: An Event Driven Energy Saving Strategy for Battery Operated Devices / E. Shih, P. Bahl, and MJ Sinclair / Mobicom 2002), An Efficient Power-Saving Mechanism for Integration of WLAN and Cellular Networks / S. Lee, S. Seo, and N. Golmie / IEEE Communications Letters, vol. 9, no. 12. In particular, the related art 2 describes a method of reducing power consumption of the mobile terminal through a signaling system using 'Mobile IPv6' in a dual interface environment.

In addition, in the prior art 3 (published, 10-1999-0059011), as in the prior art 1 and 2, a method of reducing power consumption by turning off the power of the mobile terminal when there is no data transmission and reception of the mobile terminal, Prior Art 4 (Publication, 10-2006-0094561) describes a method of increasing the transmission speed of a WLAN and reducing power consumption by appropriately selecting a power saving mode and an active mode according to transmission and reception data. It is.

The prior art 1 includes a plurality of wireless LAN adapters, and when there is no data transmission and reception, the operation of the power-consuming wireless interface is stopped, and instead, a low-power radio transceiver having a low power consumption is used. When data reception to the mobile terminal is detected, power consumption of the mobile terminal is reduced by driving the wireless Internet module again to receive data.

In addition, the prior art 2, like the prior art 1, stops the operation of the wireless Internet module when there is no data transmission and reception, and instead detects the data reception through the mobile communication module. That is, when data reception is detected through paging periodically transmitted to a mobile terminal by a base station (BS) of the mobile communication network, the wireless internet module is driven again to receive data to reduce power consumption of the mobile terminal. .

In addition, the prior art 3 is to reduce unnecessary power consumption when the power of the mobile terminal using the wireless LAN is in a sleep mode, the power is turned off (off) when data transmission and reception is finished, the power is turned off When the signal is transmitted from the base station in the state, the power consumption is reduced by turning on the power of the terminal.

In addition, the prior art 4 is to reduce unnecessary power consumption generated in the power saving mode of the existing wireless Internet module, the conventional wireless Internet module repeatedly in the doze (doze) state to confirm data transmission and reception Although awake, the prior art 4 changes to the active mode only when there is data transmission and reception, and returns to the power saving mode when the active mode holding time ends. Reduced.

However, the related art 1 has a problem in that a low-power radio transceiver function must be additionally implemented in an access point (AP) and a mobile terminal, and the mobile terminal still consumes power even when there is no data transmission and reception. There is a problem.

In addition, the related art 2 is suitable for a tightly-coupled interworking network structure in which a wireless LAN and a cellular network are operated by the same operator, and a loosely coupled wireless LAN and cellular network may be operated by different operators. Compared to the coupling network structure, the connection cost is expensive and the deployment time of the connection network is more time-consuming.

In addition, the prior art 3 has a problem that it is difficult to apply in reality because the hardware to implement the hardware for detecting the signal transmitted from the base station to the mobile terminal. In addition, when short-lived traffic is repeatedly received, power is repeatedly turned on / off.

In addition, the prior art 4, like the prior art 1, has a problem in that it still consumes power in order to maintain a doze state.

The present invention provides a method of reducing power consumption by controlling a wireless network connection of a mobile terminal in a communication system interworking a wireless network and a mobile communication network, and a mobile terminal having the same.

Another object of the present invention is to provide a method for preventing power consumption of a wireless Internet module when there is no data transmission and reception using a signal transmission system in an IP layer of a loosely-coupled interworking network structure, and a mobile terminal having the same. .

The present invention also provides a method of reducing power consumption by operating a wireless Internet module only when long-lived traffic is received, and a mobile terminal having the same.

Another object of the present invention is to provide a method for preventing power consumption in a doze state by detecting data transmission and reception using a signaling system based on Mobile IPv6, and a mobile terminal having the same.

Mobile terminal according to an embodiment of the present invention for realizing the above object is a wireless Internet module for wireless LAN or wireless Internet access, a mobile communication module for receiving a wake-up message (WAKEUP_WLAN) transmitted from a specific node of the mobile communication network, the Receiving the wake-up message (WAKEUP_WLAN) through the mobile communication module powers on the wireless Internet module to receive the traffic, and when the reception of the traffic is configured to include a control unit for powering off the wireless Internet module.

In addition, the present invention for realizing the above problem, even if there is a beacon signal (Beacon) signal, if there is no data transmission and reception of the wireless Internet module in the power-off state, ignoring the reception of temporary traffic, if the continuous traffic is received wireless Internet module Power on to maintain an awake state, and when the reception of the continuous traffic is completed is made to switch the wireless Internet module to the power off state.

The mobile terminal according to the present invention configured as described above has the effect of reducing power consumption by controlling the wireless network connection of the mobile terminal in a communication system interworking a wireless LAN and a mobile communication network.

In addition, the present invention has an effect that the power consumption in the wireless Internet module does not occur when there is no data transmission and reception using a signal transmission system in the IP layer of a loosely-coupled interworking network structure.

In addition, the present invention has the effect of reducing the power consumption by operating the wireless Internet module only when long-lived traffic is received.

In addition, the present invention has the effect of preventing power consumption in the doze (Doze) state by detecting data transmission and reception using a signaling system based on Mobile IPv6.

Hereinafter, various embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the detailed description of the well-known technology and its configuration which are determined to obscure the gist of the present invention will be omitted. In addition, in describing the present invention with reference to the drawings, components that perform the same function will be described with the same reference numerals.

Hereinafter, a mobile terminal according to the present invention will be described in more detail with reference to the accompanying drawings.

1 is a block diagram of a mobile terminal according to an embodiment of the present invention.

The mobile terminal can be implemented in various forms. For example, the mobile terminal described herein may be a mobile phone, a smart phone, a notebook computer, a digital broadcasting terminal, a personal digital assistant (PDA), a portable multimedia player (PMP), navigation, or the like. have.

The illustrated mobile terminal 100 includes a wireless communication unit 110, an A / V input unit 120, a user input unit 130, a sensing unit 140, an output unit 150, a memory 160, The interface unit 170 may include a controller 180, a power supply unit 190, and the like. 1 illustrates a mobile terminal having various components. However, not all illustrated components are required. The mobile terminal may be implemented by more components than the illustrated components, or the mobile terminal may be implemented by fewer components.

Hereinafter, the components will be described in turn.

The wireless communication unit 110 may include one or more components for wireless communication between the mobile terminal 100 and the wireless communication system or wireless communication between the mobile terminal 100 and a network in which the mobile terminal 100 is located. For example, the wireless communication unit 110 may include a broadcast receiving module 111, a mobile communication module 112, a wireless Internet module 113, a short range communication module 114, and a location information module 115 .

The broadcast receiving module 111 receives a broadcast signal and / or broadcast related information from an external broadcast management server through a broadcast channel. The broadcast channel may include a satellite channel and a terrestrial channel. The broadcast management server may mean a server that generates and transmits a broadcast signal and / or broadcast related information or a server that receives a previously generated broadcast signal and / or broadcast related information and transmits the same to a terminal. The broadcast related information may mean information related to a broadcast channel, a broadcast program, or a broadcast service provider. The broadcast signal may include not only a TV broadcast signal, a radio broadcast signal, and a data broadcast signal, but also a broadcast signal having a data broadcast signal combined with a TV broadcast signal or a radio broadcast signal.

Meanwhile, the broadcast related information may be provided through a mobile communication network, and in this case, may be received by the mobile communication module 112.

The broadcast related information may exist in various forms. For example, it may exist in the form of Electronic Program Guide (EPG) of Digital Multimedia Broadcasting (DMB) or Electronic Service Guide (ESG) of Digital Video Broadcast-Handheld (DVB-H).

The broadcast receiving module 111 receives broadcast signals using various broadcasting systems, and in particular, digital multimedia broadcasting-terrestrial (DMB-T), digital multimedia broadcasting-satellite (DMB-S), and media forward link (MediaFLO). Digital broadcast signals can be received using digital broadcasting systems such as only), digital video broadcast-handheld (DVB-H), integrated services digital broadcast-terrestrial (ISDB-T), and the like. Of course, the broadcast receiving module 111 is configured to be suitable for all broadcasting systems that provide broadcasting signals as well as the digital broadcasting system described above.

The broadcast signal and / or broadcast related information received through the broadcast receiving module 111 may be stored in the memory 160.

In addition, the mobile communication module 112 transmits and receives a radio signal with at least one of a base station, an external terminal, and a server on a mobile communication network. The wireless signal may include various types of data according to transmission and reception of a voice call signal, a video call call signal, or a text / multimedia message.

The wireless Internet module 113 is a module for wireless Internet access, and the wireless Internet module 113 can be built in or externally.

The short range communication module 114 refers to a module for short range communication. As a short range communication technology, Bluetooth, Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wideband (UWB), ZigBee, and the like may be used.

In addition, the location information module 115 is a module for checking or obtaining the location of the mobile terminal. One example is the Global Position System (GPS) module. The GPS module receives position information from a plurality of satellites. Here, the location information may include coordinate information represented by latitude and longitude. For example, the GPS module can measure the exact time and distance from three or more satellites and accurately calculate the current position by triangulating three different distances. A method of obtaining distance and time information from three satellites and correcting the error with one satellite may be used. In particular, the GPS module can obtain not only the location of latitude, longitude, and altitude but also accurate time together with three-dimensional speed information from the location information received from the satellite.

Meanwhile, the A / V input unit 120 is for inputting an audio signal or a video signal, and may include a camera 121 and a microphone 122. The camera 121 processes an image frame such as a still image or a moving image obtained by the image sensor in the video communication mode or the photographing mode. The processed image frame may be displayed on the display unit 151.

The image frame processed by the camera 121 may be stored in the memory 160 or transmitted to the outside through the wireless communication unit 110. Two or more cameras 121 may be provided according to the configuration aspect of the terminal.

The microphone 122 receives an external sound signal by a microphone in a call mode, a recording mode, a voice recognition mode, etc., and processes the external sound signal into electrical voice data. The processed voice data may be converted into a form transmittable to the mobile communication base station through the mobile communication module 112 and output in the call mode. The microphone 122 may implement various noise removing algorithms for removing noise generated in the process of receiving an external sound signal.

The user input unit 130 generates input data for the user to control the operation of the terminal. The user input unit 130 may include a key pad dome switch, a touch pad (static pressure / capacitance), a jog wheel, a jog switch, and the like. In particular, when the touch pad has a mutual layer structure with the display unit 151 described later, this may be referred to as a touch screen.

The sensing unit 140 detects a current state of the mobile terminal 100 such as an open / closed state of the mobile terminal 100, a location of the mobile terminal 100, presence or absence of a user contact, orientation of the mobile terminal, acceleration / deceleration of the mobile terminal, and the like. To generate a sensing signal for controlling the operation of the mobile terminal 100. For example, when the mobile terminal 100 is in the form of a slide phone, it may sense whether the slide phone is opened or closed. In addition, it is responsible for sensing functions related to whether the power supply unit 190 is supplied with power or whether the interface unit 170 is coupled to an external device.

The interface unit 170 serves as an interface with all external devices connected to the mobile terminal 100. For example, wired / wireless headset ports, external charger ports, wired / wireless data ports, memory card ports, ports for connecting devices with identification modules, audio input / output (I / O) ports, Video I / O (Input / Output) port, earphone port, etc. may be included.

Here, the identification module is a chip that stores various types of information for authenticating the use authority of the mobile terminal 100, and includes a user identification module (UIM) and a subscriber identify module (SIM). ), A Universal Subscriber Identity Module (“USIM”), and the like. In addition, the device equipped with the identification module (hereinafter, 'identification device') may be manufactured in the form of a smart card. Therefore, the identification device may be connected to the terminal 100 through a port. The interface unit 170 receives data from an external device or receives power and transmits the data to each component inside the mobile terminal 100 or transmits the data inside the mobile terminal 100 to an external device.

The output unit 150 is for outputting an audio signal, a video signal, or an alarm signal. The output unit 150 may include a display unit 151, a sound output module 152, an alarm unit 153, and the like.

The display unit 151 displays and outputs information processed by the mobile terminal 100. For example, when the mobile terminal is in a call mode, a user interface (UI) or a graphic user interface (GUI) related to a call is displayed. When the mobile terminal 100 is in a video call mode or a photographing mode, the mobile terminal 100 displays a photographed and / or received image, a UI, or a GUI.

Meanwhile, as described above, when the display unit 13 and the touch pad form a mutual layer structure to form a touch screen, the display unit 151 may be used as an input device in addition to the output device. The display unit 151 may include a liquid crystal display, a thin film transistor-liquid crystal display, an organic light-emitting diode, a flexible display, and a three-dimensional display. 3D display). In addition, two or more display units 151 may exist according to the implementation form of the mobile terminal 100. For example, an external display unit (not shown) and an internal display unit (not shown) may be simultaneously provided in the mobile terminal 100.

The sound output module 152 outputs audio data received from the wireless communication unit 110 or stored in the memory 160 in a call signal reception, a call mode or a recording mode, a voice recognition mode, a broadcast reception mode, and the like. In addition, the sound output module 152 outputs a sound signal related to a function (eg, a call signal reception sound, a message reception sound, etc.) performed in the mobile terminal 100. The sound output module 152 may include a speaker, a buzzer, and the like.

The alarm unit 153 outputs a signal for notifying occurrence of an event of the mobile terminal 100. Examples of events occurring in the mobile terminal include call signal reception, message reception, and key signal input. The alarm unit 153 may output a signal for notifying occurrence of an event in a form other than an audio signal or a video signal. For example, the signal may be output in the form of vibration. When a call signal is received or a message is received, the alarm unit 153 may output a vibration to inform this. Alternatively, when a key signal is input, the alarm unit 153 may output a vibration in response to the key signal input. Through the vibration output as described above, the user can recognize the occurrence of the event. Of course, the signal for notification of event occurrence may be output through the display unit 151 or the voice output module 152.

The memory 160 may store a program for processing and controlling the controller 180 and may provide a function for temporarily storing input / output data (for example, a phone book, a message, a still image, a video, etc.). It can also be done.

The memory 160 may be a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (for example, SD or XD memory), RAM Random Access Memory (RAM) Static Random Access Memory (SRAM), Read-Only Memory (ROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Programmable Read-Only Memory (PROM) magnetic memory, It may include at least one type of storage medium of the optical disk. In addition, the mobile terminal 100 may operate a web storage that performs a storage function of the memory 150 on the Internet.

The controller 180 typically controls the overall operation of the mobile terminal. For example, perform related control and processing for voice calls, data communications, video calls, and the like. In addition, the control unit 180 may include a multimedia module 181 for multimedia playback. The multimedia module 181 may be implemented in the controller 180 or may be implemented separately from the controller 180.

The power supply unit 190 receives an external power source and an internal power source under the control of the controller 180 to supply power for operation of each component.

The various embodiments described herein may be implemented in a computer readable recording medium using, for example, software, hardware or a combination thereof.

According to a hardware implementation, embodiments described herein include application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), and the like. It may be implemented using at least one of processors, controllers, micro-controllers, microprocessors, and electrical units for performing the functions. It may be implemented by the controller 180.

In a software implementation, embodiments such as procedures or functions may be implemented with separate software modules that allow at least one function or operation to be performed. The software code may be implemented by a software application written in a suitable programming language. In addition, the software codes may be stored in the memory 160 and executed by the control unit 180. [

 In the above, the mobile terminal related to the present invention has been described in terms of components according to functions. Hereinafter, referring to FIGS. 2 and 3, the mobile terminal related to the present invention will be further described in terms of components according to appearance. Hereinafter, a slider type mobile terminal is described as an example among various types of mobile terminals such as a folder type, a bar type, a swing type, a slider type, and the like for clarity of explanation. Therefore, the present invention is not limited to the slider type mobile terminal, but can be applied to all types of mobile terminals including the above-described type.

2 is a front perspective view of an example of a mobile terminal according to the present invention; The mobile terminal of the present invention includes a first body 200 and a second body 205 configured to be slidable in at least one direction on the first body 200.

A state in which the first body 200 is disposed to overlap with the second body 205 may be referred to as a closed configuration, and as shown in the drawing, the first body 200 may be referred to as the second body 205. The exposed state of at least a portion of the N may be referred to as an open configuration.

The mobile terminal mainly operates in a standby mode in a closed state, but the standby mode may be released by a user's operation. In addition, although the mobile terminal operates mainly in a call mode or the like in an open state, the mobile terminal may be switched to a standby mode by a user's manipulation or a lapse of a predetermined time.

The case (casing, housing, cover, etc.) forming the exterior of the first body 200 is formed by the first front case 220 and the first rear case 225. Various electronic components are embedded in the space formed by the first front case 220 and the first rear case 225. At least one intermediate case may be further disposed between the first front case 220 and the first rear case 225.

The cases may be formed by injecting synthetic resin, or may be formed to have a metal material, for example, stainless steel (STS) or titanium (Ti).

The display module 151, the audio output module 152, the camera 121, or the first user input unit 210 may be disposed on the first body 200, specifically, the first front case 220.

The display module 151 includes a liquid crystal display (LCD), organic light emitting diodes (OLED), and the like, which visually express information.

In addition, since the touch pad is superimposed on the display module 151 in a layer structure, the display module 151 may operate as a touch screen to enable input of information by a user's touch.

The sound output module 152 may be implemented in the form of a speaker.

The camera 121 may be implemented to be suitable for capturing an image or a video of a user or the like.

Like the first body 200, the case forming the exterior of the second body 205 is formed by the second front case 230 and the second rear case 235.

The second user input unit 215 may be disposed on the second body 205, specifically, on the front face of the second front case 230.

The third user input unit 245, the microphone 122, and the interface unit 170 may be disposed in at least one of the second front case 230 or the second rear case 235.

The first to third user inputs 210, 215, and 245 may be collectively referred to as a manipulating portion 130, and may be any method in which the user operates while giving a tactile feeling. Either may be employed.

For example, the user input unit may be implemented as a dome switch or a touch pad capable of receiving a command or information by a user's push or touch operation, or a wheel or jog method of rotating a key, or a manipulation method such as a joystick. May also be implemented.

In functional terms, the first user input unit 210 is for inputting a command such as start, end, scroll, etc., and the second user input unit 215 is for inputting numbers, letters, symbols, and the like.

In addition, the third user input unit 245 may operate as a hot key for activating a special function in the mobile terminal.

The microphone 122 may be implemented in a form suitable for receiving a user's voice, other sounds, and the like.

The interface unit 170 serves as a passage for allowing the mobile terminal according to the present invention to exchange data with an external device. For example, the interface unit 170 is wired or wirelessly, a connection terminal for connecting with an earphone, a port for short-range communication (for example, an infrared port (IrDA port), a Bluetooth port, a wireless LAN port) wireless LAN port), or at least one of power supply terminals for supplying power to the mobile terminal.

The interface unit 170 may be a card socket that accommodates an external card such as a subscriber identification module (SIM) or a user identity module (UIM) and a memory card for storing information.

The power supply unit 190 for supplying power to the mobile terminal is mounted on the second rear case 235 side.

The power supply unit 190 may be detachably coupled for charging, for example, as a rechargeable battery.

3 is a rear perspective view of the mobile terminal of FIG.

Referring to FIG. 3, a camera 121 may be additionally mounted on the rear surface of the second rear case 235 of the second body 205. The camera 121 of the second body 205 has a photographing direction substantially opposite to the camera 121 of the first body 200, and the camera 121 and the camera 121 of the first body 200. And may have different pixels.

For example, the camera 121 of the first body 200 has a low pixel so that it is easy to take a picture of the user's face and transmit it to the counterpart in the case of a video call, and the camera 121 of the second body is generally It is desirable to have a high pixel because the subject is often photographed and not immediately transmitted.

The flash 250 and the mirror 255 may be further disposed adjacent to the camera 121 of the second body 205. The flash 250 illuminates the subject when the subject is photographed by the camera 121 of the second body 205. The mirror 255 allows the user to see the user's face or the like when photographing (self-photographing) the user by using the camera 121 of the second body 205.

The sound output module 152 may be further disposed on the second rear case 235.

The sound output module 152 of the second body 205 may implement a stereo function together with the sound output module 152 of the first body 200, and may be used for a call in a speakerphone mode.

In addition, an antenna 260 for receiving a broadcast signal may be disposed on one side of the second rear case 235. The antenna 260 may be installed to be pulled out of the second body 205.

A portion of the slide module 265 that slidably couples the first body 200 and the second body 205 is disposed on the side of the first rear case 225 of the first body 200.

The other part of the slide module 265 may be disposed on the second front case 230 side of the second body 205 and may not be exposed to the outside as shown in this drawing.

In the above description, the second camera 121 and the like have been described as being disposed on the second body 205, but the present invention is not limited thereto.

For example, at least one or more of the components 260, 121 to 250, and 152 described as disposed on the second rear case 235, such as the camera 121 of the second body, may be the first body 200. May be mounted on the first rear case 225. In such a case, there is an advantage that the configuration (s) disposed in the first rear case 225 in the closed state are protected by the second body 205. In addition, even if the camera 121 of the second body is not provided separately, the camera 121 of the first body may be rotatably formed so that the camera 121 of the second body may be photographed up to the photographing direction of the camera 121. .

The terminal 100 illustrated in FIGS. 1 to 3 may operate in a communication system capable of transmitting data through a frame or packet, including a wired / wireless communication system and a satellite-based communication system. It can be configured to.

Hereinafter, referring to FIG. 4, a communication system capable of operating a terminal according to the present invention will be described.

The communication system may use different air interfaces and / or physical layers. For example, a radio interface usable by a communication system may include frequency division multiple access (FDMA), time division multiple access (TDMA), and code division multiple access (Code Division). Multiple Access (CDMA), Universal Mobile Telecommunications Systems (UMTS) (especially Long Term Evolution (LTE)), Global System for Mobile Communications (GSM), etc. May be included. Hereinafter, for convenience of description, the description will be limited to CDMA. However, it is a matter of course that the present invention is applicable to all communication systems including the CDMA wireless communication system.

As shown in FIG. 4, the CDMA wireless communication system includes a plurality of terminals 100, a plurality of base stations (BSs) 270, and base station controllers (BSCs) 275. ), And a mobile switching center (MSC) 280. The MSC 280 is configured to be connected to a Public Switched Telephone Network (“PSTN”) 290 and is also configured to be connected to BSCs 275. The BSCs 275 may be coupled to the BS 270 through a backhaul line. The backhaul line may be provided according to at least one of E1 / T1, ATM, IP, PPP, Frame Relay, HDSL, ADSL, or xDSL. Thus, a plurality of BSCs 275 may be included in the system shown in FIG.

Each BS 270 may include at least one sector, and each sector may include an omnidirectional antenna or an antenna pointing radially out of BS 270. In addition, each sector may include two or more antennas of various types. Each BS 270 may be configured to support a plurality of frequency assignments, each of which has a specific spectrum (eg, 1.25 MHz, 5 MHz, etc.).

The intersection of sectors and frequency assignments may be called a CDMA channel. BS 270 may be referred to as a base station transceiver subsystem ('BTSs'). In this case, the word "base station" may be called the sum of one BSC 275 and at least one BS 270. The base station may also indicate “cell site”. Alternatively, each of the plurality of sectors for a particular BS 270 may be called a plurality of cell sites.

As shown in FIG. 4, a broadcasting transmitter (BT) 295 transmits a broadcast signal to terminals 100 operating in the system. The broadcast module 111 shown in FIG. 1 is provided in the terminal 100 to receive a broadcast signal transmitted by the BT 295.

In addition, FIG. 4 illustrates several satellite positioning systems (GPS) satellites 300. The satellites 300 help to locate the at least one terminal of the plurality of terminals 100. Although two satellites are shown in FIG. 4, useful location information may be obtained by two or less or more satellites. The GPS module 115 shown in FIG. 1 cooperates with the satellites 300 to obtain desired location information. Here, the location can be tracked using all the techniques that can track the location, not just the GPS tracking technology. In addition, at least one of the GPS satellites 300 may optionally or additionally be responsible for satellite DMB transmission.

During typical operation of a wireless communication system, BS 270 receives a reverse link signal from various terminals 100. At this time, the terminals 100 are connecting a call, transmitting or receiving a message, or performing another communication operation. Each of the reverse link signals received by a particular base station 270 is processed within by the particular base station 270. The data generated as a result of the processing is transmitted to the connected BSC 275. BSC 275 provides call resource allocation and mobility management functionality, including the organization of soft handoffs between base stations 270. In addition, the BSC 275 transmits the received data to the MSC 280, and the MSC 280 provides an additional transmission service for connection with the PSTN 290. Similarly, PSTN 290 connects with MSC 280, MSC 280 connects with BSCs 275, and BSCs 275 send BSs 270 to transmit a forward link signal to terminals 100. ).

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5 is an exemplary view showing a weak coupling interworking structure of a wireless LAN and a mobile communication network according to the present invention.

As shown therein, a plurality of mobile nodes (MNs), counter nodes (CNs), radio network controllers (RNCs), packet switching support nodes (SGSNs), It may include a Packet Control Function (PCF), a Gateway GPRS Support Node (GGSN), and a Home Agent (HA). Here, a plurality of WLAN coverages 310 and 320 may be implemented in the cell coverage 300 of the mobile communication network.

The present invention relates to a method for reducing power of a mobile terminal based on 'Mobile IPv6'. As shown in FIG. 5, a wireless LAN is deployed by an operator separate from the mobile communication network, so that a wireless LAN gateway is provided. It can be applied to loosely-coupled interlocking structures that are directly connected to the Internet.

FIG. 6 is a graph comparing state transitions between a wireless Internet module operating in a conventional power saving mode and a wireless Internet module operating in a hibernation mode of the present invention. In the present invention, the wireless Internet module 113 may be connected to a WLAN by a communication protocol such as Wi-bro or Wi-Fi.

As shown in FIG. 6A, the wireless Internet module operating in the conventional power save mode is used to confirm data transmission / reception of the wireless Internet module in a doze state, that is, the AP. It must be repeatedly awake to receive a Beacon message from it. In addition, it can be seen that the power is continuously consumed even while staying in the doze state.

However, the present invention, as shown in Figure 6 (b), even if there is a beacon (Beacon) signal when there is no data transmission and reception of the power of the wireless Internet module (OFF) completely off (Short-lived) traffic It operates in hibernation mode, which turns on the power of the wireless Internet module only when it receives neglected and long-lived traffic.

In this case, the present invention provides a signaling system based on 'Mobile IPv6' in order to notify the reception of the long-lived traffic, that is, to power on the wireless Internet module 113 of the mobile terminal.

In addition, in the present invention, in order to reduce the delay time due to switching from the mobile communication module 112 to the wireless Internet module 113, and stores the IP address information of the 802.11 WLAN gateway to which each AP (Access Point) belongs, The stored IP address of the WLAN gateway is included in the SSID (Service Set Identifier) field when the AP sends a beacon message to the mobile terminals.

As shown in FIG. 7, the SSID field includes an IP address of a gateway (eg, 2001: 1302: A83B: 1104), a delimiter (/ (slash)), and a prefix length (IP address) of the IP address. For example, 64), at least one space character, and a service set identity (eg, API).

In the present invention, since the controller 180 can obtain a care-of address (CoA) as soon as it receives a beacon message from the AP, it can reduce the delay time due to switching to the wireless Internet module 113 as compared with the prior art.

In the present invention, the case where the mobile terminal receives data according to the characteristics that the traffic in the fourth generation wireless network mainly takes the top down packet transmission rather than the bottom up packet transmission. In the present embodiment, it is assumed that the mobile terminal has only the mobile communication module 112 powered on and the wireless internet module 113 is powered off.

8 is a diagram illustrating in detail a signal flow for received data traffic to a mobile terminal.

First, as a first step, if there is long-lived traffic to be sent to the mobile terminal by a correspondent node communicating with the mobile terminal, a specific field (flow label) of the IP packet is set to one. The partner node sets the CoA of the mobile terminal obtained from its binding cache as the destination address of the IP packet and transmits the packet (S101).

As a second step, when the Gateway GPRS Support Node (GGSN), which controls IP connection between the mobile terminal and the Internet, receives a packet sent from the opposite node to the mobile terminal, the specific field (flow label) is first checked. (S102). If the field is set to 1, a third step is performed (S103). Otherwise, since the received packet is short-lived traffic, the packet is transmitted to a Serving GPRS Support Node (SGSN), which sends the packet through the mobile communication module 112 of the mobile terminal (MN). It transmits (S104).

As a third step, when the specific field (Flow label) is set to 1, GGSN recognizes that the received packet is long-lived traffic and moves until the wireless internet module receives a message indicating that the wireless internet module is powered on. Packets destined for the terminal are stored in its own buffer (S105). At the same time, the GGSN transmits a wake-up message WAKEUP_WLAN informing the mobile terminal MN to power on the wireless Internet module 113 (S106).

The wake-up message WAKEUP_WLAN is a message provided for power saving in the present invention and is a Mobile IPv6 message in which a mobility header type is set to 10.

As a fourth step, the mobile terminal MN receiving the wake-up message WAKEUP_WLAN may power on the wireless Internet module 113 to receive long-lived traffic (S107) and connect through beacon scanning. After the AP is found, an association with the appropriate AP is performed (S108).

After coupling to the appropriate AP as a fifth step, the mobile terminal configures a new CoA using the IP address prefix information of the 802.11 gateway included in the received beacon message (S109).

As a sixth step, as soon as the mobile terminal (MN) completes setting of a new CoA, the mobile terminal (MN) transmits a tunnel request message (REQ_TUNNEL) including the newly configured CoA to the GGSN (S110). Like the wake-up message WAKEUP_WLAN, the tunnel request message REQ_TUNNEL is also a Mobile IPv6 message provided for power saving in the present invention, and the mobility header type is set to 11.

The mobile terminal MN also transmits a binding update message (BU: Binding Update) to inform the counterpart node CN of a new CoA (S111). At this time, the one-time flag (O: One-time) of the binding update message (BU) to be transmitted is set to 1, which is a field not used in the mobility header provided for power saving in the present invention. As a newly added field in the Reserved field, if set to 1, the partner node uses the CoA included in the binding update message (BU) only for the current session and is stored in its binding cache. Does not change the CoA value.

As a seventh step, when the GGSN receives the tunnel request message REQ_TUNNEL from the mobile terminal MN, the GGSN tunnels the buffered packets to the new CoA included in the message (S112). In addition, the GGSN tunnels not only the buffered packets but also packets transmitted by the other node to the previous CoA of the mobile terminal to the new CoA of the mobile terminal. As a result, these packets are transmitted through the wireless internet module 113 of the mobile terminal (MN).

As an eighth step, when the counter node CN receives the binding update (BU) message sent from the mobile terminal (S111), the destination node (C111) changes the destination address of packets of the current session to the CoA included in the binding update (BU) message (S113). ). If the one-time flag O of the received binding update message is 1, the counterpart node does not change the binding cache entry of the mobile terminal.

When reception of the long-lived traffic through the wireless Internet module is completed, as shown in FIG. 6B, the controller 180 powers an awake state of the wireless Internet module 113. Switch to the power-off state. That is, the wireless internet module 113 is powered off. As described above in the sixth step, even when the wireless internet module 113 is powered off and starts to operate as a mobile communication module, the controller 180 needs to transmit a binding update message BU to inform the counter node CN. There is no. This is because the counterpart node keeps the CoA for the mobile communication module 112 in its binding cache.

Hereinafter, with reference to the experimental data measured the performance of the Mobile IPv6-based power saving method in the interworking structure of the wireless LAN and the mobile communication network according to the present invention, the existing wireless Internet module operating in the power saving mode and the present invention Comparison with the method by the method will be described.

The duration of the data session for this experiment was set to 5 minutes and 1 minute for long-lived and short-lived traffic, respectively. In addition, the power consumption in the active state and the doze state of the wireless Internet module is set to 1.4 W (watts) and 0.06 W, respectively, the active state and idle of the mobile communication module 112 The power consumption in the idle state was set to 1.254 W and 0.125 W, respectively.

FIG. 9 is a graph measuring power consumption according to the arrival rate of a data session when an idle time in which a counterpart node does not send data to a mobile terminal is 1 minute and 10 minutes on average.

Referring to Figure 9, the power saving technique with hibernation mode according to the present invention is compared to the conventional method of operating in the power save mode (graph shown by WLAN PS), average idle time (idle). Both 1 minute and 10 minutes show better performance in terms of power consumption. Specifically, when the average idle time is 1 minute and 10 minutes, the performance improvement is up to 29% and 55%, respectively.

FIG. 10 is a graph measuring power consumption according to arrival rate of a data session when the ratio R of 70% and 40% of long-lived traffic in total traffic is 70% and 40%.

Referring to FIG. 10, the power saving method according to the present invention is 40% compared to the method of operating in the conventional power save mode (graph shown by WLAN PS) when the ratio R is 70%. It can be seen that both show better performance in terms of power consumption.

In addition, as shown in FIG. 10, even when the proportion of short-lived traffic is high, that is, the proportion of long-lived traffic is low, the power saving according to the present invention is compared with the conventional method. The effect is greater.

1 is a block diagram of a mobile terminal associated with one embodiment of the present invention;

Figure 2 is a front perspective view of an example of a mobile terminal according to the present invention.

3 is a rear perspective view of the mobile terminal of FIG. 2;

4 is an exemplary diagram of a communication system operable by a terminal according to the present invention;

5 is an exemplary view showing a weak coupling interworking structure of a wireless LAN and a mobile communication network according to the present invention.

FIG. 6 is a graph comparing state transitions between a wireless Internet module operating in a hibernation mode and a wireless internet module operating in a conventional power saving mode. FIG.

7 is an exemplary view showing the configuration of an SSID field including a beacon message according to the present invention.

8 is a state diagram showing in detail the signal flow for the received data traffic to the mobile terminal according to the present invention.

FIG. 9 is a graph comparing power consumption according to arrival rate of a data session when the idle time in which a counterpart node does not send data to a mobile terminal is 1 minute and 10 minutes in accordance with the present invention and the related art. FIG.

FIG. 10 is a graph comparing power consumption according to arrival rate of a data session when the ratio R of continuous traffic in total traffic is 70% and 40% for the present invention and the related art.

Claims (18)

Maintaining the wireless internet module in the power-off state when there is no data transmission and reception even though there is a beacon signal; Ignoring the reception of the temporary traffic and powering on the wireless internet module if continuous traffic is received to maintain the awake state; And switching the wireless internet module to a power-off state when the reception of the continuous traffic is completed. The method of claim 1, wherein the continuous traffic, A method for controlling access to a wireless network of a mobile terminal, characterized in that the counter node sets and transmits a specific field (flow label field) of an IP packet to a specific value (1). The wireless internet module of claim 1, wherein A wireless network access control method of a mobile terminal, characterized in that powered on by receiving a wake-up message (WAKEUP_WLAN) transmitted from a specific node of a mobile communication network. The wakeup message of claim 3, A method for controlling access to a wireless network of a mobile terminal, characterized in that the Mobile IPv6 message is set to 10. The method of claim 1, wherein when the wireless Internet module is powered on, Performing association by finding an access point (AP) that can be connected through beacon scanning; Configuring a new CoA by using the IP address prefix information of the 802.11 gateway included in the beacon message after joining the AP; and controlling the wireless network access of the mobile terminal. Way. The method of claim 5, wherein the beacon message, A method for controlling access to a wireless network of a mobile terminal, characterized in that it is included in an SSID field. The method of claim 6, wherein the SSID field, A method for controlling access to a wireless network of a mobile terminal, comprising a combination of an IP address of a gateway, a separator, a prefix length of an IP address, at least one space character, and an identity of a service set. The method of claim 5, wherein when the setting for the new CoA is completed, Transmitting a tunnel request message (REQ_TUNNEL) including a newly configured CoA to a specific node of a mobile communication network; And a packet buffered at the specific node and a packet transmitted by the counterpart node to the previous CoA of the mobile terminal to be tunneled to the new CoA. The method of claim 5, wherein when the setting for the new CoA is completed, Transmitting a binding update message (BU: Binding Update) to inform the counterpart node CN of the new CoA; And transmitting the destination address of the packets of the current session to the CoA included in the binding update (BU) message by the counter node (CN). The method of claim 8, wherein the tunnel request message, 12. A method for controlling access to a wireless network of a mobile terminal, characterized in that the Mobile IPv6 message has a mobility header type set to 11. The method of claim 9, wherein the binding update message, A method for controlling access to a wireless network of a mobile terminal, comprising one of a reserved field not used in a mobility header, as a one-time flag. The method according to claim 11, wherein if the one-time flag is set to a specific value (1), The counterpart node uses the CoA included in the binding update message BU only for the current session, and does not change the CoA value of the corresponding mobile terminal stored in its binding cache. Wireless network access control method of a mobile terminal. The method of claim 3 or 8, wherein the specific node, A method for controlling access to a wireless network of a mobile terminal, characterized in that it is a packet gateway support node (GGSN). A wireless internet module for wireless LAN or wireless internet access; A mobile communication module for receiving a wake-up message WAKEUP_WLAN transmitted from a specific node of a mobile communication network; And a controller configured to power on the wireless Internet module to receive traffic when receiving the wake-up message WAKEUP_WLAN through the mobile communication module, and to power off the wireless Internet module when reception of the traffic is completed. Mobile terminal, characterized in that. The method of claim 14, wherein the control unit, After powering on the wireless Internet module, an AP (Access Point) that can be connected through beacon scanning is found and associated, and the IP address prefix of the 802.11 gateway included in the beacon message is fixed. A mobile terminal, comprising: configuring a new CoA using information. The method of claim 15, wherein the control unit, After completing the setting for the new CoA, the tunnel request message (REQ_TUNNEL) including the newly configured CoA is transmitted to a specific node of the mobile communication network, and the packets buffered at the specific node and the counterpart node are transmitted to the previous CoA of the mobile terminal. The mobile terminal is configured to tunnel one packet to the new CoA. The method of claim 15, wherein the control unit, After setting up the new CoA, a binding update message (BU: Binding Update) is transmitted to the counterpart node (CN) to inform the new CoA, and the counterpart node (CN) changes the packets of the current session into the new CoA. Mobile terminal, characterized in that configured to be transmitted. The method of claim 14 or 16, wherein the specific node, A mobile terminal, characterized in that it is a Gateway Gateway Support Node (GGSN).

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