Abstract:
A mobile terminal includes a wireless communication unit configured to scan at least one frequency band and a controller, wherein the controller is configured to generate a channel list comprising broadcast channels individually having signal strength that meets a reference value, each of the broadcast channels being assigned to the scanned at least one frequency band and update the channel list based upon a repeated scan of the at least one frequency band performed by the wireless communication unit.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
       [0001]    This application claims the benefit of the Korean Patent Application No. 10-2008-0059224, filed on Jun. 23, 2008, which is hereby incorporated by reference as if fully set forth herein. 
       FIELD OF THE INVENTION 
       [0002]    The present invention relates to a mobile terminal, and more particularly, to a mobile terminal and method of managing a channel list therein. 
       DISCUSSION OF THE RELATED ART 
       [0003]    A mobile terminal is a device which may be configured to perform various functions. Examples of such functions include data and voice communications, capturing images and video via a camera, recording audio, playing music files via a speaker system, and displaying images and video on a display. Some mobile terminals include additional functionality which supports game playing, while other mobile terminals are configured as multimedia players. More recently, mobile terminals have been configured to receive broadcast and multicast signals which permit viewing of content such as videos and television programs. 
         [0004]    Efforts are ongoing to support and increase the functionality of mobile terminals. Such efforts include software and hardware improvements, as well as changes and improvements in the structural components which form the mobile terminal. 
         [0005]    In a related art broadcast receiving terminal, a channel list is displayed and a user selects a specific broadcast channel included in the displayed channel list. The broadcast receiving terminal then outputs a broadcast signal provided on the selected broadcast channel. 
         [0006]    However, according to the related art, a broadcast channel, which is substantially non-viewable due to weak signal strength, is included in a channel list. Therefore, there is a need to provide a user with a channel list including only broadcast channels that provide substantially viewable contents. 
       SUMMARY OF THE INVENTION 
       [0007]    In accordance with an embodiment, a mobile terminal includes a wireless communication unit configured to scan at least one frequency band and a controller configured to generate a channel list comprising broadcast channels individually having signal strength that meets a reference value, each of the broadcast channels being assigned to the scanned at least one frequency band and update the channel list based upon a repeated scan of the at least one frequency band performed by the wireless communication unit. 
         [0008]    In accordance with an embodiment, a method of managing a channel list in a mobile terminal includes scanning at least one frequency band, searching for broadcast channels individually having signal strength that meets a reference value among broadcast channels assigned to the scanned at least one frequency band, generating a channel list comprising the broadcast channels individually having the signal strength that meets the reference value, each of the broadcast channels being assigned to the scanned at least one frequency band, scanning a specific frequency band, and updating the channel list based upon the scan of the specific frequency band. 
         [0009]    These and other embodiments will also become readily apparent to those skilled in the art from the following detailed description of the embodiments having reference to the attached figures, the invention not being limited to any particular embodiment disclosed. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0010]    The above and other aspects, features, and advantages of the present invention will become more apparent upon consideration of the following description of preferred embodiments, taken in conjunction with the accompanying drawings. 
           [0011]      FIG. 1  is a block diagram of a mobile terminal in accordance with an embodiment of the present invention. 
           [0012]      FIG. 2A  is a perspective view of a front side of a mobile terminal according to an embodiment of the present invention. 
           [0013]      FIG. 2B  is a rear view of the mobile terminal shown in  FIG. 2A . 
           [0014]      FIG. 3A  and  FIG. 3B  show an identity device that is detachable from a terminal according to an embodiment of the present invention. 
           [0015]      FIG. 4  is a block diagram of a wireless communication system operable with the mobile terminal of  FIGS. 1-3B . 
           [0016]      FIG. 5  is a flowchart illustrating managing a channel list in a mobile terminal according to an embodiment of the present invention. 
           [0017]      FIGS. 6A to 8B  are views of a display screen displaying a channel list in a mobile terminal according to an embodiment of the present invention. 
           [0018]      FIGS. 9A to 9F  are views of a display screen displaying a channel list updated according to a result of frequency band scan in a mobile terminal according to an embodiment of the present invention. 
           [0019]      FIGS. 10A to 10C  are views of a display screen displaying a channel list updated by an add/delete selection made by a user in a mobile terminal according to an embodiment of the present invention. 
           [0020]      FIGS. 11A to 11C  are views of a display screen displaying contents from selected broadcast channels in a mobile terminal according to an embodiment of the present invention during a broadcast outputting mode. 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0021]    In the following detailed description, reference is made to the accompanying drawing figures which form a part hereof, and which show by way of illustration specific embodiments of the invention. It is to be understood by those of ordinary skill in this technological field that other embodiments may be utilized, and structural, electrical, as well as procedural changes may be made without departing from the scope of the present invention. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or similar parts. 
         [0022]      FIG. 1  is a block diagram of mobile terminal  100  in accordance with an embodiment of the present invention. The mobile terminal  100  may be implemented using a variety of different types of mobile terminals. Examples of such mobile terminals include mobile phones, user equipments, smart phones, computers, digital broadcast mobile terminals, personal digital assistants (PDA), portable multimedia players (PMP) and navigators. By way of non-limiting example only, further description will be with regard to a mobile terminal. However, such teachings apply equally to other types of mobile terminals. While  FIG. 1  shows the mobile terminal  100  having various components, it is understood that implementing all of the illustrated components is not a requirement, and greater or fewer components may alternatively be implemented. 
         [0023]      FIG. 1  shows a wireless communication unit  110  configured with several commonly implemented components. For instance, the wireless communication unit  110  typically includes one or more components which permit wireless communication between the mobile terminal  100  and a wireless communication system or network within which the mobile terminal is located. 
         [0024]    The broadcast receiving module  111  receives a broadcast signal and/or broadcast associated information from an external broadcast managing entity via a broadcast channel. The broadcast channel may include a satellite channel and a terrestrial channel. The broadcast managing entity refers generally to a system which transmits a broadcast signal and/or broadcast associated information. Examples of broadcast associated information include information associated with a broadcast channel, a broadcast program, a broadcast service provider, and the like. For instance, broadcast associated information may include an electronic program guide (EPG) of digital multimedia broadcasting (DMB) and electronic service guide (ESG) of digital video broadcast-handheld (DVB-H). 
         [0025]    The broadcast signal may be implemented as a TV broadcast signal, a radio broadcast signal, and a data broadcast signal, among others. If desired, the broadcast signal may further include a broadcast signal combined with a TV or radio broadcast signal. 
         [0026]    The broadcast receiving module  111  may be configured to receive broadcast signals transmitted from various types of broadcast systems. By non-limiting example, such broadcasting systems include digital multimedia broadcasting-terrestrial (DMB-T), digital multimedia broadcasting-satellite (DMB-S), digital video broadcast-handheld (DVB-H), the data broadcasting system known as media forward link only (MediaFLO®) and integrated services digital broadcast-terrestrial (ISDB-T). Receiving of multicast signals is also possible. If desired, data received by the broadcast receiving module  111  may be stored in a suitable device, such as memory  160 . 
         [0027]    The mobile communication module  112  transmits/receives wireless signals to/from one or more network entities such as a base station or Node-B. Such signals may represent audio, video, multimedia, control signaling, and data, among others. 
         [0028]    The wireless internet module  113  supports Internet access for the mobile terminal  100 . This module may be internally or externally coupled to the mobile terminal  100 . 
         [0029]    The short-range communication module  114  facilitates relatively short-range communications. Suitable technologies for implementing this module include radio frequency identification (RFID), infrared data association (IrDA), ultra-wideband (UWB), as well as the networking technologies commonly referred to as Bluetooth and ZigBee, to name a few. 
         [0030]    Position-location module  115  identifies or otherwise obtains the location of the mobile terminal  100 . If desired, this module may be implemented using global positioning system (GPS) components which cooperate with associated satellites, network components, and combinations thereof. 
         [0031]    Audio/video (A/V) input unit  120  is configured to provide audio or video signal input to the mobile terminal. As shown, the A/V input unit  120  includes a camera  121  and a microphone  122 . The camera  121  receives and processes image frames of still pictures or video. 
         [0032]    The microphone  122  receives an external audio signal while the mobile terminal  100  is in a particular mode, such as phone call mode, recording mode and voice recognition. This audio signal is processed and converted into digital data. The mobile terminal  100 , and in particular, A/V input unit  120 , typically includes assorted noise removing algorithms to remove noise generated in the course of receiving the external audio signal. Data generated by the A/V input unit  120  may be stored in memory  160 , utilized by output unit  150 , or transmitted via one or more modules of communication unit  110 . If desired, two or more microphones  122  and/or cameras  121  may be used. 
         [0033]    The user input unit  130  generates input data responsive to user manipulation of an associated input device or devices. Examples of such devices include a keypad, a dome switch, a jog wheel, a jog switch, and a touchpad such as static pressure/capacitance. A specific example is one in which the user input unit  130  is configured as a touchpad in cooperation with a touchscreen display. 
         [0034]    The sensing unit  140  provides status measurements of various aspects of the mobile terminal  100 . For instance, the sensing unit  140  may detect an open/close status of the mobile terminal  100 , relative positioning of components, such as display and keypad, of the mobile terminal  100 , a change of position of the mobile terminal or a component of the mobile terminal, a presence or absence of user contact with the mobile terminal, orientation or acceleration/deceleration of the mobile terminal. As an example, consider the mobile terminal  100  being configured as a slide-type mobile terminal. In this configuration, the sensing unit  140  may sense whether a sliding portion of the mobile terminal  100  is open or closed. Other examples include the sensing unit  140  sensing the presence or absence of power provided by the power supply  190 , the presence or absence of a coupling or other connection between the interface unit  170  and an external device. 
         [0035]    The interface unit  170  is often implemented to couple the mobile terminal  100  with external devices. Typical external devices include wired/wireless headphones, external chargers, power supplies, earphones, microphones, and storage devices configured to store data such as audio, video, and pictures, among others. The interface unit  170  may be configured using a wired/wireless data port, a card socket for coupling to a memory card and a device equipped with identity module, audio input/output ports and video input/output ports. 
         [0036]    In this case, the identity module is a chip that stores various kinds of information for identifying or authenticating use authority of the mobile terminal  100 . The identity module can include one of a user identity module (UIM), a subscriber identity module (SIM), a universal subscriber identity module (USIM) and the like. In particular, the identity module can include a module for identifying or authenticating authority for a broadcast purchase and/or a broadcast viewing using the mobile terminal  100 . A device provided with the identity module or identity device can be manufactured as a smart card. Hence, the identity device can be connected to the mobile terminal  100  via a port for connecting the identity device. 
         [0037]    The output unit  150  generally includes various components which support the output requirements of the mobile terminal  100 . Display  151  is typically implemented to visually display information associated with the mobile terminal  100 . For instance, if the mobile terminal  100  is operating in a phone call mode, the display will generally provide a user interface or graphical user interface which includes information associated with placing, conducting, and terminating a phone call. As another example, if the mobile terminal  100  is in a video call mode or a photographing mode, the display  151  may additionally or alternatively display images which are associated with these modes. 
         [0038]    One particular implementation includes the display  151  configured as a touchscreen working in cooperation with an input device, such as a touchpad. This configuration permits the display  151  to function both as an output device and an input device. 
         [0039]    The display  151  may be implemented using known display technologies including, for example, a liquid crystal display (LCD), a thin film transistor-liquid crystal display (TFT-LCD), an organic light-emitting diode display (OLED), a flexible display and a three-dimensional display. The mobile terminal  100  may include one or more of such displays. An example of a two-display embodiment is one in which one display is configured as an internal display which is viewable when the mobile terminal  100  is in an opened position and a second display configured as an external display which is viewable in both the open and closed positions. 
         [0040]    Further, a proximity sensor may be provided within the touchscreen or around the touchscreen. Alternatively, the proximity sensor can be provided within the sensing unit  140 . The proximity sensor is a sensor that detects a presence or absence of an object approaching a prescribed detecting surface or an object existing around the proximity sensor using an electromagnetic field strength or infrared ray without direct contact. Hence, in general, the proximity sensor has durability longer than that of a contact type sensor and also has utility wider than that of the contact type sensor. 
         [0041]    The proximity sensor can include one of a transmittive photoelectric sensor, a direct reflective photoelectric sensor, a mirror reflective photoelectric sensor, a radio frequency oscillation proximity sensor, an electrostatic capacity proximity sensor, a magnetic proximity sensor, an infrared proximity sensor and the like. 
         [0042]    One example for the operational principle of the radio frequency oscillation proximity sensor is explained as follows. First of all, while an oscillation circuit is oscillating at a full-wave radio frequency, if an object approaches in the vicinity of the sensor detecting surface, oscillation amplitude of the oscillation circuit attenuates or stops. Such a variation is converted to an electric signal to detect a presence or non-presence of the object. Therefore, even if a different substance except a metallic substance is placed between the radio frequency oscillation proximity sensor and the object, the proximity switch is able to detect a specific object without interference with the different substance. 
         [0043]    Although the proximity sensor is not provided, in case that the touchscreen is an electrostatic type, the proximity sensor can be configured to detect proximity of a pointer using a variation of an electric field according to the proximity of the pointer. Therefore, if the pointer is located in the vicinity of the touchscreen despite not contacting the touchscreen, it is able to detect the position of the pointer and the distance between the pointer and the touchscreen. In the following description, for clarity, an action that a pointer approaches without contacting the touchscreen to be recognized as located on the touchscreen is named ‘proximity touch’. An action that a pointer actually touches the touchscreen is named ‘contact touch’. The meaning of the position on the touchscreen proximity-touched by the pointer means the position of the pointer which vertically opposes the touchscreen when the pointer performs the proximity touch. 
         [0044]    The proximity sensor detects a proximity touch and a proximity touch pattern such as a proximity touch distance, a proximity touch duration, a proximity touch position, and a proximity touch shift state. Information corresponding to the detected proximity touch action and the detected proximity touch pattern can be output to the touch screen. 
         [0045]      FIG. 1  further shows output unit  150  having an audio output module  152  which supports the audio output requirements of the mobile terminal  100 . The audio output module is often implemented using one or more speakers, buzzers, other audio producing devices, and combinations thereof. The audio output module functions in various modes including call-receiving mode, call-placing mode, recording mode, voice recognition mode and broadcast reception mode. During operation, the audio output module  152  outputs audio relating to a particular function such as call received, message received, and errors. 
         [0046]    The output unit  150  is further shown having an alarm  153 , which is commonly used to signal or otherwise identify the occurrence of a particular event associated with the mobile terminal. Typical events include call received, message received and user input received. An example of such output includes the providing of tactile sensations, such as vibration, to a user. For instance, the alarm  153  may be configured to vibrate responsive to the mobile terminal  100  receiving a call or message. As another example, vibration is provided by alarm  153  responsive to receiving user input at the mobile terminal  100 , thus providing a tactile feedback mechanism. It is understood that the various output provided by the components of output unit  150  may be separately performed, or such output may be performed using any combination of such components. 
         [0047]    The memory  160  is generally used to store various types of data to support the processing, control, and storage requirements of the mobile terminal  100 . Examples of such data include program instructions for applications operating on the mobile terminal  100 , contact data, phonebook data, messages, pictures, and video. The memory  160  shown in  FIG. 1  may be implemented using any type or combination of suitable volatile and non-volatile memory or storage devices including random access memory (RAM), static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disk, card-type memory, or other similar memory or data storage device. 
         [0048]    The controller  180  typically controls the overall operations of the mobile terminal  100 . For instance, the controller  180  performs the control and processing associated with voice calls, data communications, video calls, camera operations and recording operations. If desired, the controller  180  may include a multimedia module  181  which provides multimedia playback. The multimedia module  181  may be configured as part of the controller  180 , or this module may be implemented as a separate component. 
         [0049]    The controller  180  is able to perform pattern recognizing processing for recognizing a handwriting input performed on the touchscreen as a character or recognizing a picture drawing input performed on the touchscreen as an image. 
         [0050]    The power supply  190  provides power required by the various components for the mobile terminal  100 . The provided power may be internal power, external power, or combinations thereof. 
         [0051]    Various embodiments described herein may be implemented in a computer-readable medium using, for example, computer software, hardware, or some combination thereof. For a hardware implementation, the embodiments described herein may be implemented within one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), processors, controllers, micro-controllers, microprocessors, other electronic units designed to perform the functions described herein, or a selective combination thereof. In some cases, such embodiments are implemented by the controller  180 . 
         [0052]    For a software implementation, the embodiments described herein may be implemented with separate software modules, such as procedures and functions, each of which perform one or more of the functions and operations described herein. The software codes can be implemented with a software application written in any suitable programming language and may be stored in memory  160 , and executed by a controller  180  or processor. 
         [0053]    The mobile terminal  100  may be implemented in a variety of different configurations. Examples of such configurations include folder-type, slide-type, bar-type, rotational-type, swing-type and combinations thereof. For clarity, further disclosure will primarily relate to a slide-type mobile terminal. However, such teachings apply equally to other types of mobile terminals. 
         [0054]      FIG. 2A  is a perspective view of a front side of a mobile terminal  100  according to an embodiment of the present invention. In  FIG. 2A , the mobile terminal  100  is shown having a first body  200  configured to slidably cooperate with a second body  205 . The user input unit is implemented using function keys  210  and keypad  215 . The function keys  210  are associated with first body  200 , and the keypad  215  is associated with second body  205 . The keypad includes various keys, such as numbers, characters, and symbols, to enable a user to place a call, prepare a text or multimedia message, and otherwise operate the mobile terminal  100 . 
         [0055]    The first body  200  slides relative to second body  205  between open and closed positions. In a closed position, the first body  200  is positioned over the second body  205  in such a manner that the keypad  215  is substantially or completely obscured by the first body  200 . In the open position, user access to the keypad  215 , as well as the display  151  and function keys  210 , is possible. The function keys  210  are convenient to a user for entering commands such as start, stop and scroll. 
         [0056]    The mobile terminal  100  is operable in either a standby mode, during which is able to receive a call or message, receive and respond to network control signaling, or an active call mode. Typically, the mobile terminal  100  functions in a standby mode in the closed position, and an active mode in the open position. This mode configuration may be changed as required or desired. 
         [0057]    The first body  200  is shown formed from a first case  220  and a second case  225 , and the second body  205  is shown formed from a first case  230  and a second case  235 . The first and second cases  220 ,  225 ,  230 ,  235  are usually formed from a suitably rigid material such as injection molded plastic, or formed using metallic material such as stainless steel (STS) and titanium (Ti). 
         [0058]    If desired, one or more intermediate cases may be provided between the first and second cases  220 ,  225 ,  230 ,  235  of one or both of the first and second bodies  200 ,  205 . The first and second bodies  200 ,  205  are typically sized to receive electronic components necessary to support operation of the mobile terminal  100 . 
         [0059]    The first body  200  is shown having a camera  121  and audio output unit  152 , which is configured as a speaker, positioned relative to the display  151 . If desired, the camera  121  may be constructed in such a manner that it can be selectively positioned, for example, rotated or swiveled, relative to first body  200 . 
         [0060]    The function keys  210  are positioned adjacent to a lower side of the display  151 . The display  151  is shown implemented as an LCD or OLED. Recall that the display  151  may also be configured as a touchscreen having an underlying touchpad which generates signals responsive to user contact, for example, via a finger, stylus, and the like, with the touchscreen. 
         [0061]    Second body  205  is shown having a microphone  122  positioned adjacent to keypad  215 , and side keys  245 , which are one type of a user input unit, positioned along the side of second body  205 . Preferably, the side keys  245  may be configured as hot keys, such that the side keys are associated with a particular function of the mobile terminal  100 . An interface unit  170  is shown positioned adjacent to the side keys  245 , and a power supply  190  in a form of a battery is located on a lower portion of the second body  205 . 
         [0062]      FIG. 2B  is a rear view of the mobile terminal  100  shown in  FIG. 2A .  FIG. 2B  shows the second body  205  having a camera  121 , an associated flash  250 , and a mirror  255 . The flash  250  operates in conjunction with the camera  121  of the second body  205 . The mirror  255  is useful for assisting a user to position camera  121  in a self-portrait mode. The camera  121  of the second body  205  faces a direction which is opposite to a direction faced by camera  121  of the first body  200  ( FIG. 2A ). Each of the cameras  121  of the first and second bodies  200 ,  205  may have the same or different capabilities. 
         [0063]    In an embodiment, the camera  121  of the first body  200  operates with a relatively lower resolution than the camera  121  of the second body  205 . Such an arrangement works well during a video conference, for example, in which reverse link bandwidth capabilities may be limited. The relatively higher resolution of the camera  121  of the second body  205  ( FIG. 2B ) is useful for obtaining higher quality pictures for later use or for communicating to others. 
         [0064]    The second body  205  also includes an audio output module  152  configured as a speaker, and which is located on an upper side of the second body. If desired, the audio output modules  152  of the first and second bodies  200 ,  205  may cooperate to provide stereo output. Moreover, either or both of these audio output modules  152  may be configured to operate as a speakerphone. 
         [0065]    A broadcast signal receiving antenna  260  is shown located at an upper end of the second body  205 . Antenna  260  functions in cooperation with the broadcast receiving module  111 . If desired, the antenna  260  may be fixed or configured to retract into the second body  205 . The rear side of the first body  200  includes slide module  265 , which slidably couples with a corresponding slide module located on the front side of the second body  205 . 
         [0066]    It is understood that the illustrated arrangement of the various components of the first and second bodies  200 ,  205  may be modified as required or desired. In general, some or all of the components of one body may alternatively be implemented on the other body. In addition, the location and relative positioning of such components are not critical to many embodiments, and as such, the components may be positioned at locations which differ from those shown by the representative figures. 
         [0067]      FIG. 3A  and  FIG. 3B  are perspective views of an identity device that is detachable from a mobile terminal  100  according to an embodiment of the present invention. In this case, the identity device includes an SIM card, for example. 
         [0068]    Referring to  FIG. 3A  and  FIG. 3B , the identity device  310  is detachably provided to the mobile terminal  100 . Hence, a new identity device can be loaded in the mobile terminal  100  by replacing an old identity device. Optionally, the identity device  310  can be loaded in the mobile terminal  100  by being combined with the interface unit  170 . Alternatively, the identity device  310  can be provided to the mobile terminal  100  by being connected to a connector separately provided for the connection with the identity device  310 . 
         [0069]    A connecting means for connecting the identity device  310  and the mobile terminal  100  together can be provided to any one of backside, lateral sides, a front side and the like of the mobile terminal. 
         [0070]    The mobile terminal  100  shown in  FIGS. 1 to 3B  can be configured to be operable in a wire/wireless communication system, a satellite based communication system or a communication system capable of transmitting data carried on frames or packets. The mobile terminal  100  of  FIGS. 1-3B  may be configured to operate within a communication system which transmits data via frames or packets, including both wireless and wireline communication systems, and satellite-based communication systems. Such communication systems utilize different air interfaces and/or physical layers. 
         [0071]    Examples of such air interfaces utilized by the communication systems include example, frequency division multiple access (FDMA), time division multiple access (TDMA), code division multiple access (CDMA), and universal mobile telecommunications system (UMTS), the long term evolution (LTE) of the UMTS, and the global system for mobile communications (GSM). By way of non-limiting example only, further description will relate to a CDMA communication system, but such teachings apply equally to other system types. 
         [0072]    Referring now to  FIG. 4 , a CDMA wireless communication system is shown having a plurality of mobile terminals  100 , a plurality of base stations  270 , base station controllers (BSCs)  275 , and a mobile switching center (MSC)  280 . The MSC  280  is configured to interface with a conventional public switch telephone network (PSTN)  290 . The MSC  280  is also configured to interface with the BSCs  275 . The BSCs  275  are coupled to the base stations  270  via backhaul lines. The backhaul lines may be configured in accordance with any of several known interfaces including, for example, E1/T1, ATM, IP, PPP, Frame Relay, HDSL, ADSL, or xDSL. It is to be understood that the system may include more than two BSCs  275 . 
         [0073]    Each base station  270  may include one or more sectors, each sector having an omni-directional antenna or an antenna pointed in a particular direction radially away from the base station  270 . Alternatively, each sector may include two antennas for diversity reception. Each base station  270  may be configured to support a plurality of frequency assignments, with each frequency assignment having a particular spectrum, for example, 1.25 MHz or 5 MHz. 
         [0074]    The intersection of a sector and frequency assignment may be referred to as a CDMA channel. The base stations  270  may also be referred to as base station transceiver subsystems (BTSs). In some cases, the term “base station” may be used to refer collectively to a BSC  275 , and one or more base stations  270 . The base stations may also be denoted “cell sites.” Alternatively, individual sectors of a given base station  270  may be referred to as cell sites. 
         [0075]    A broadcasting transmitter  295  is shown broadcasting to mobile terminals  100  operating within the system. The broadcast receiving module  111  of the mobile terminal  100  is typically configured to receive broadcast signals transmitted by the broadcasting transmitter  295 . Similar arrangements may be implemented for other types of broadcast and multicast signaling as discussed above. 
         [0076]      FIG. 4  further depicts several global positioning system (GPS) satellites  300 . Such satellites facilitate locating the position of some or all of the mobile terminals  100 . Two satellites are depicted, but it is understood that useful positioning information may be obtained with greater or fewer satellites. The position-location module  115  ( FIG. 1 ) of the mobile terminal  100  is typically configured to cooperate with the satellites  300  to obtain desired position information. It is to be appreciated that other types of position detection technology, for example, location technology that may be used in addition to or instead of GPS location technology, may alternatively be implemented. If desired, some or all of the GPS satellites  300  may alternatively or additionally be configured to provide satellite DMB transmissions. 
         [0077]    During typical operation of the wireless communication system, the base stations  270  receive sets of reverse-link signals from various mobile terminals  100 . The mobile terminals  100  are engaging in calls, messaging, and other communications. Each reverse-link signal received by a given base station  270  is processed within that base station. The resulting data is forwarded to an associated BSC  275 . The BSC provides call resource allocation and mobility management functionality including the orchestration of soft handoffs between base stations  270 . The BSCs  275  also route the received data to the MSC  280 , which provides additional routing services for interfacing with the PSTN  290 . Similarly, the PSTN interfaces with the MSC  280 , and the MSC interfaces with the BSCs  275 , which in turn control the base stations  270  to transmit sets of forward-link signals to the mobile terminals  100 . 
         [0078]    For clarity and convenience of the following description, the mobile terminal  100  described in the following description can include at least one of the elements shown in  FIG. 1 . In the following description, a channel list managing method in a mobile terminal according to an embodiment of the present invention is explained with reference to  FIG. 5 . 
         [0079]      FIG. 5  is a flowchart illustrating a method of managing a channel list in a mobile terminal  100  according to an embodiment of the present invention. Referring to  FIG. 5 , the mobile terminal  100  scans at least one frequency band using the wireless communication unit  110  (S 510 ). In particular, the mobile terminal  100  is able to perform the frequency band scanning operation using the broadcast receiving module  111  or a module separately provided for the frequency band scan. 
         [0080]    In this case, the frequency band may mean the frequency band assigned to provide the mobile terminal  100  with a broadcast signal, such as video, audio and/or a data signal constructing a broadcast program, or broadcast relevant information, such as information relevant to a broadcast channel or a broadcast program. 
         [0081]    An entire frequency band for providing a broadcast signal can be divided into at least one or more frequency bands. At least one or more broadcast channels can be assigned to each of the frequency bands. In particular, in DVB-T, a frequency band can be called a channel and a broadcast channel can be called a service. 
         [0082]    During the scanning in S 510 , the mobile terminal  100  is able to sequentially scan at least one or more frequency bands. According to a result of the scanning, it is able to obtain a broadcast channel assigned to each of the at least one or more frequency bands and signal strength of the corresponding broadcast channel. Moreover, broadcast channels assigned to the same frequency band can have the same signal strength. 
         [0083]    The scanning in S 510  can be performed responsive to at least one of user input for selecting a frequency scan and detection of an area migration. Optionally, the scanning in S 510  can be performed periodically or randomly. 
         [0084]    For instance, the scanning in S 510  can be performed when a command for selecting a frequency scan is received via the user input unit  130 , when a broadcast mode for a broadcast viewing is entered using the mobile terminal  100 , or when area migration of the mobile terminal is detected though the position-location module  115 . 
         [0085]    Subsequently, the mobile terminal  100  searches at least one or more broadcast channels assigned to each of the scanned frequency bands for the broadcast channel having the signal strength equal to or greater than a predetermined reference (also referred to herein as a threshold) using the scan result from the scanning in S 510  (S 520 ). 
         [0086]    In this case, the predetermined reference can be set up by a user or can be randomly set up by the mobile terminal  100 . The predetermined reference may be a minimum or threshold signal strength required for broadcast signal reception and output. 
         [0087]    As mentioned in the foregoing description, the mobile terminal  100  is able to obtain the signal strengths of the broadcast channels assigned to each of the scanned frequency bands using the scan result of the frequency band obtained during the scanning in S 510 . It is understood that the frequency band scan result obtained from the scanning in S 510  can be stored in the memory  160  according to a control signal of the controller  180 . 
         [0088]    The mobile terminal  100  obtains the signal strength for each broadcast channel from the memory  160  and then identifies and detects the broadcast channel having the signal strength equal to or greater than the predetermined reference. Subsequently, the mobile terminal  100  generates a channel list including the broadcast channel having the signal strength equal to or greater than the predetermined reference using the search result from the searching in S 520  (S 530 ). For instance, generating a channel list in S 530  can be performed by the controller  180 . 
         [0089]    In the channel list generated in S 530 , the signal strengths of the broadcast channels included in the channel list can be contained. Moreover, in S 530 , a channel name, channel identification information, broadcast organization information per channel, information of a previous/present/next broadcast program per channel and the like can be included in the channel list. Subsequently, the mobile terminal  100  is able to display the updated channel list generated in S 530  via the display  151  (S 560 ). 
         [0090]    The mobile terminal  100  is able to display the signal strength per broadcast channel on the generated channel list. And, the mobile terminal  100  updates the signal strength per broadcast channel using the signal strength per channel obtained from the scanning in S 510  and then displays the updated signal strength per broadcast channel on the generated channel list. 
         [0091]    In the following description, the channel list displaying in S 560  is explained in detail with reference to  FIGS. 6A to 8B . For clarity and convenience of explanation, signal strength per broadcast channel is represented using a bar. For example, a dark or striped region of the bar increases in proportion to the signal strength. Moreover, it is understood that the signal strength per broadcast channel can be represented using at least one of a bar, a numeral, text, an icon, an image, an animation and the like. 
         [0092]      FIG. 6A  and  FIG. 6B  are views of a display screen displaying a channel list in the mobile terminal  100 . Referring to  FIG. 6A , the mobile terminal  100  displays a channel list including broadcast channels, for example, channels  1 - 8 , having signal strengths equal to or greater than a predetermined reference via the display  151 . Referring to  FIG. 6B , the mobile terminal  100  displays signal strength of each broadcast channel included in the channel list via the display  151 , the signal strength represented by the dark region in the bar  601 . 
         [0093]      FIG. 7A  and  FIG. 7B  are views of a display screen displaying a frequency band list in the mobile terminal  100 . Referring to  FIG. 7A , the mobile terminal  100  displays the frequency band list including frequency bands. In this case, at least one broadcast channel can be assigned to each of the frequency bands included in the frequency band list. If a user selects a specific frequency band from the frequency band list, the mobile terminal  100  displays a channel list including at least one broadcast channel assigned to the specific frequency band. 
         [0094]    Referring to  FIG. 7B , the mobile terminal  100  displays signal strengths of the frequency bands included in the frequency band list via the display  151 . For example, the signal strength is indicated by the dark region in the bar  701 . As mentioned in the foregoing description, a plurality of broadcast channels assigned to the same frequency band can have the same signal strength. 
         [0095]      FIG. 8A  and  FIG. 8B  are views of a display screen displaying a channel list while a broadcast is being output in the mobile terminal  100 . Referring to  FIG. 8A , while the mobile terminal  100  is outputting a broadcast signal provided from a channel, for example, “CH  1 ,” a user selects a menu item ‘channel list’ corresponding to a channel list view function via a menu search. 
         [0096]    Referring to  FIG. 8B , the mobile terminal  100  displays a channel list including broadcast channels, for example, 2 nd  and 5 th -8 th  channels, having signal strengths equal to or greater than a predetermined reference. 
         [0097]    Referring back to  FIG. 5 , the mobile terminal  100  scans at least one or more frequency bands for a specific frequency band using the wireless communication unit  110  (S 540 ). In particular, the mobile terminal  100  performs a frequency band scanning operation using the broadcast receiving module  111  or a module separately provided for the frequency band scan. 
         [0098]    According to a result of the scanning in S 540 , the mobile terminal  100  obtains the signal strength of the at least one broadcast channel assigned to the specific frequency band. In one aspect, the signal strength per broadcast channel obtained from the scanning in S 540  can be stored in the memory  160  according to a control signal of the controller  180 . 
         [0099]    For instance, the specific frequency band includes at least one selected from the group of a frequency band assigned to at least one broadcast channel included or not included in the channel list generated in S 530 , a frequency band selected by a user and a frequency band allowed in a currently located area. 
         [0100]    The scanning in S 540  can be performed responsive to at least one of user input for selecting a frequency scan, entering a broadcast mode, or detecting area migration. Alternatively, it is able to perform the scanning in S 540  randomly or periodically. 
         [0101]    Subsequently, the mobile terminal  100  updates the channel list generated in S 530  using the scan result obtained from the scanning in S 540  (S 550 ). When updating the channel list in S 550 , a user may select “add” or “delete” via the user input unit  130  to add a specific broadcast channel to the channel list or to delete a specific broadcast channel from the channel list generated in S 530 . 
         [0102]    Subsequently, the mobile terminal  100  displays the channel list updated in S 550  via the display  151  (S 560 ). The mobile terminal  100  may display signal strength per broadcast channel on the updated channel list. Moreover, the mobile terminal  100  is able to update and display the signal strength per broadcast channel on the updated channel list using the signal strength per broadcast channel obtained from the scanning in S 540 . 
         [0103]    In the following description, displaying the channel list updated according to the frequency band scanning result in S 560  is explained in detail with reference to  FIGS. 9A to 9F .  FIGS. 9A to 9F  are views of a display screen displaying a channel list updated according to a result of the frequency band scan in a mobile terminal  100  according to an embodiment of the present invention. 
         [0104]    In the following description, for clarity and convenience of explanation, whole frequency band is assumed to include first to sixth frequency bands. Further, first and second channels, third and fourth channels, fifth and sixth channels, seventh and eight channels, ninth and tenth channels, and eleventh and twelfth channels are assigned to the first to sixth frequency bands, respectively. Moreover, it is assumed that broadcast channels assigned to the same frequency band have the same signal strength. A single broadcast channel may be assigned to a single frequency band as well. 
         [0105]    Besides, the signal strength per broadcast channel, which is displayed on a channel list, can be represented using at least one of a bar, a numeral, text, an icon, an image, an animation and the like. In the following description, for clarity and convenience of explanation, signal strength is represented using a numeral, numeral incremented in proportion to the signal strength, for example, the numeral 10 being the strongest signal. 
         [0106]      FIG. 9A  shows screen configuration for selecting a specific frequency band to scan to update a channel list in the terminal  100 . Referring to  FIG. 9A , if a user selects an area “Scan” for inputting a frequency band scan command to update a previously generated channel list, for example, including 1 st -8 th  channels, the mobile terminal  100  displays a scan condition list  901  on the screen of the display  151 . Further, the channel list shown in  FIG. 9A  also indicates signal strength for each channel, for example, the 1 st  channel having the signal strength of (9) and the 8 th  channel having the signal strength of (7). 
         [0107]    If “scan all” is selected from the scan condition list  901  shown in  FIG. 9A , the mobile terminal  100  scans the whole frequency band including the first to sixth frequency bands, updates the previously generated channel list according to the scan result, and then displays the updated channel list, as shown in  FIG. 9B . 
         [0108]    For instance, if it is determined by the mobile terminal  100  that the signal strength of each of the broadcast channels assigned to the first, fourth and sixth frequency bands is equal to or greater than a predetermined reference, the mobile terminal displays a channel list including the 1 st , 2 nd , 7 th , 8 th , 11 th  and 12 th  channels which are the broadcast channels assigned to the first, fourth and sixth frequency bands, as shown in  FIG. 9B . The mobile terminal  100  is also able to display the signal strength per broadcast channel obtained from the scan result on the updated channel list. FIG.  9 B shows a display screen displaying a channel list updated according to a frequency band scan result, the updated channel list including, for example, 1 st , 2 nd , 7 th , 8 th , 11 th , and 12 th  channels. 
         [0109]      FIG. 9C  also shows a display screen displaying a channel list updated according to a frequency band scan result, the frequency band scanned responsive to a different condition selected from the scan condition list  901 . If “Scan inclusive channel” is selected from the scan condition list  901  shown in  FIG. 9A , the mobile terminal  100  scans the first to fourth frequency bands, updates the previously generated channel list according to the scan result, and then displays the updated channel list. For instance, if it is determined that the signal strength of each of the broadcast channels assigned to the first, second and fourth frequency bands is equal to or greater than a predetermined reference, the mobile terminal  100  displays a channel list including the 1 st -4 th , 7 th , and 8 th  channels which are the broadcast channels assigned to the first, second and fourth frequency bands, as shown in  FIG. 9C . 
         [0110]      FIG. 9D  shows a display screen displaying a channel list updated according to a frequency band scan result, the frequency band scanned responsive to a different condition selected from the scan condition list  901 . If “Scan non-inclusive channel” is selected from the scan condition list  901  shown in  FIG. 9A , the mobile terminal  100  scans the fifth and sixth frequency bands to which broadcast channels not included in a previously generated channel list are assigned, updates the previously generated channel list according to the scan result, and displays the updated channel list. For instance, if it is determined that the signal strength of each of the broadcast channels assigned to the fifth frequency band is equal to or greater than a predetermined reference, the mobile terminal  100  displays an updated channel list adding the 9 th  and 10 th  channels assigned to the fifth frequency band to the previously generated channel list. 
         [0111]      FIG. 9E  shows a display screen displaying a channel list updated according to a frequency band scan result. Referring to (a) of  FIG. 9E , if “Scan user-selected channel” is selected from the scan condition list  901  shown in  FIG. 9A , the mobile terminal  100  displays a channel list including the 1 st  to 12 th  channels that are the broadcast channels assigned to the first to sixth frequency bands constructing the whole frequency band. 
         [0112]    Referring to (b) of  FIG. 9E , if the 1 st , 3 rd  and 12 th  channels are selected in (a) of  FIG. 9E , the mobile terminal  100  scans the first, second and sixth frequency bands to which the 1 st , 3 rd  and 12 th  channels are assigned, respectively, updates the previously generated channel list according to the scan result, and then displays the updated channel list. For instance, according to a result of the scan, if it is determined that the signal strength of each of the first and second channels is equal to or greater than the predetermined reference and that the signal strength of the 3 rd  channel is weaker than the predetermined reference, the mobile terminal  100  displays a channel list generated by deleting the 3 rd  and 4 th  channels corresponding to the broadcast channels assigned to the frequency band having the 3 rd  channel assigned thereto from the previously generated channel list and adding the 1 st  and 2 nd  channels assigned to the first frequency band having the 1 st  channel assigned thereto and the 11 th  and 12 th  channels assigned to the sixth frequency band having the 12 th  channel assigned thereto to the previously generated channel list. 
         [0113]    Alternatively, a channel list configured in a manner of deleting the 3 rd  channel from the previously generated channel list and adding the 1 st  and 12 th  channels to the previously generated channel list may be displayed. 
         [0114]      FIG. 9F  shows a display screen displaying a channel list updated according to a frequency band scan result. For clarity and convenience of explanation, it is assumed that frequency bands allowed in a currently located area of the mobile terminal  100  are the second, third and fifth frequency bands. If “Scan allowed bands” is selected from the scan condition list  901  shown in  FIG. 9A , the mobile terminal  100  scans the second, third and fifth frequency bands, updates a previously generated channel list according to the scan result, and then displays the updated channel list. For instance, if it is determined that the signal strength of each of the broadcast channels assigned to the second, third and fifth frequency bands is equal to or greater than a predetermined reference, the mobile terminal  100  displays a channel list generated by adding the 9 th  and 10 th  channels corresponding to the broadcast channels assigned to the fifth frequency band. In this case, since the broadcast channels assigned to the second and third frequency bands are already included in the channel list, it is able to update the signal strength displayed on the channel list by reflecting the scan result. 
         [0115]    In the following description, displaying the channel list updated according to the delete/add selection made by a user in S 560  is explained in detail with reference to  FIGS. 10A to 10C .  FIG. 10A  shows a display screen configured to enable a user to input a broadcast channel delete or add command to update a channel list in the mobile terminal  100 . Referring to  FIG. 10A , if a user selects an area “CH add/delete” to input a broadcast channel add or delete command to update a previously generated channel list, the mobile terminal  100  displays an area to select “Add” or “Delete.” 
         [0116]      FIG. 10B  shows a display screen displaying a channel list updated according to a broadcast channel add selection made by a user in the mobile terminal  100 . Referring to  FIG. 10B , if “Add” is selected in  FIG. 10A , the mobile terminal  100  displays a channel list including addible broadcast channels, for example, 9 th -12 th  channels, on a prescribed portion of the screen, as shown in (a) of  FIG. 10B , and then displays a channel list by adding the broadcast channels selected by a user, for example, 9 th  and 11 th  channels, to the previously generated channel list, as shown in (b) of  FIG. 10B . In this case, the mobile terminal  100  scans a frequency band having the ‘add’-selected broadcast channel assigned thereto and is then able to display signal strength per broadcast channel obtained from the scan on the updated channel list shown in (b) of  FIG. 10B . 
         [0117]      FIG. 10C  shows a display screen displaying a channel list updated according to a broadcast channel delete selection made by a user in the mobile terminal  100 . Referring to  FIG. 10C , if “Delete” is selected in  FIG. 10A , the mobile terminal  100  displays a channel list including erasable broadcast channels on a prescribed portion of the screen, as shown in (a) of  FIG. 10C  and then displays a channel list by deleting the broadcast channels selected by a user to the previously generated channel list, as shown in (b) of  FIG. 10C . For example, the selected channels, 1 st , 3 rd , and 6 th  channels, are deleted from the channel list when “CH delete” is selected after selecting the channels to be deleted in the channel list. 
         [0118]    Referring back to  FIG. 5 , in the course of outputting a broadcast signal, the mobile terminal  100  is able to select a broadcast channel to correspond to a user selection operation with reference to the channel list generated in S 530  or the channel list updated in S 550 . In the following description, a process for selecting a broadcast channel in the course of outputting a broadcast is explained in detail with reference to  FIGS. 11A to 11C . 
         [0119]      FIGS. 11A to 11C  are views of a display screen configured to select a broadcast channel in the mobile terminal  100  during a broadcast outputting mode. For clarity and convenience of explanation, it is assumed that a channel list includes 1 st , 2 nd , 5 th , 6 th , 9 th  and 10 th  channels. It is also assume that the 1 st  and 2 nd  channels are assigned to a first frequency band, the 5 th  and 6 th  channels are assigned to a third frequency band, and the 9 th  and 10 th  channels are assigned to a fifth frequency band. 
         [0120]    Referring to  FIG. 11A , in the course of outputting a broadcast signal provided on a specific broadcast channel, for example, fifth channel or “CH  5 ,” the mobile terminal  100  displays an area for a broadcast channel selection on a prescribed portion of the screen. For instance, the area for the broadcast channel selection is represented as either a left or down direction arrow, or a right or up direction arrow. If the left arrow is selected, a channel after the 5 th  channel is selected from a plurality of broadcast channels in a channel list. If the right arrow is selected, a channel before the 5 th  channel is selected from a plurality of broadcast channels constructing a channel list. 
         [0121]    Specifically, if the right arrow is selected in  FIG. 11A , the mobile terminal  100  selects the 6 th  channel and outputs a broadcast signal provided on the 6 th  channel, as shown in (a) of  FIG. 11B . Further, if the right arrow (dark arrow) is selected in (a) of  FIG. 11B , the mobile terminal  100  selects the 9 th  channel, which is a representative channel of the fifth frequency band located next to the third frequency band having the 5 th  channel assigned thereto and then outputs a broadcast signal provided on the 9 th  channel or “CH  9 ,” as shown in (b) of  FIG. 11B . 
         [0122]    If the left arrow is selected in  FIG. 11A , the mobile terminal  100  selects the 2 nd  channel, which is located previous to the 5 th  channel, and then outputs a broadcast signal provided on the 2 nd  channel or “CH  2 ,” as shown in (a) of  FIG. 11C . 
         [0123]    If the left arrow (dark arrow) is selected in (a) of  FIG. 11C , the mobile terminal  100  selects the 1 st  channel, which is a representative channel of the first frequency band located previous to the third frequency band having the 5 th  channel assigned thereto, and then outputs a broadcast signal provided on the 1 st  channel, or “CH  1 ,” as shown in (b) of  FIG. 11C . 
         [0124]    According to one embodiment of the present invention, the above-described method of managing a channel list in a mobile terminal can be implemented in a program recorded medium as computer-readable codes. The computer-readable media include all kinds of recording devices in which data readable by a computer system are stored. The computer-readable media include ROM, RAM, CD-ROM, magnetic tapes, floppy discs, optical data storage devices, and the like for example and also include carrier-wave type implementations such as transmission via Internet. The computer can include the controller  180  of the mobile terminal  100 . 
         [0125]    Accordingly, the present invention provides a user with a channel list including viewable broadcast channels. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. Thus, it is intended that the present invention covers the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.