Abstract: An apparatus for providing location-specific alert information associated with an alert condition relevant to a geographical area may include a receiver adapted to receive transmissions comprising formatted text on a communication channel of a wireless bi-directional communication network; a peripheral device operable to indicate an alert condition, including displaying the formatted text; and a controller communicatively coupled to the receiver and the peripheral device. The controller is operable to monitor a communication channel of the network for the receipt of a transmission of location-specific alert information from a transmitter servicing a geographical area and to operate the peripheral device in response to the reception of the transmission of the location-specific alert information to display the formatted text.

Abstract: A communication method for a mobile sensor node in a wireless sensor network includes: in a state that the mobile sensor node performs synchronization by a message reception interrupt from a parent sensor node and determines an uplink active duration and a downlink active duration, transmitting a message to the parent sensor node in the transmitting duration of the uplink active duration, receiving and processing messages from the parent sensor node and sensor nodes linearly connected around the parent sensor node in the receiving duration of the uplink active duration, and resetting a new parent sensor node using the received signal strength indications RSSIs of the received messages; and transmitting a message to the parent sensor node in the transmitting duration of the downlink active duration, checking whether or not a message is received from the parent sensor node in the receiving duration of the downlink active duration, if the message is not received from the parent sensor node, determining that time

Abstract: In an earthquake noticing system according to the present invention, an earthquake noticing server receives focal data, calculates an expected time of arrival from a distance calculated from an occurrence location of an earthquake, a self-location and a focal depth, calculates an estimated seismic intensity from the occurrence location of the earthquake, the self-location and the seismic magnitude, calculates a corrected value of the expected time of arrival from the occurrence location of the earthquake, the self location and the location of a sub-terminal, and transmits the corrected value and estimated seismic intensity to the sub-terminal.

Abstract: A method of maintaining and controlling a plurality of wireless light fixtures includes providing the light fixtures in a structure, wirelessly receiving respective operational data from each of the light fixtures at a central location, aggregating the received respective operational data to form an aggregation of operational data, and analyzing at least a portion of the aggregation of operational data. The method further includes performing one or both of (i) controlling the operation of a first selected one or more of the light fixtures based on a result of the analyzing step by wirelessly transmitting respective operational commands from the central location to each of the first selected one or more of the light fixtures, and (ii) causing a maintenance related action to be taken with respect to each of a second selected one or more of the light fixtures based on a result of the analyzing step.

Abstract: A wireless body network (8) for monitoring a patient (16, 32), the wireless body network (8) includes at least one wireless unit (10, 12, 14, 34, 36, 38, 40) coupled to the patient (16, 32) configured to collect and transmit data to the wireless body network related to one physiological function of the patient. The wireless unit (10, 12, 14, 34, 36, 38, 40) employs an addressing scheme (80), including a patient identification field (82) that contains a patient identification number that is unique to the wireless body network; at least one of a service type field (84) that contains a service type and a point type field (86) that indicates whether the wireless unit (10, 12, 14, 34, 36, 38, 40) provides a service or consumes a service; and a point identification field (88) that distinguishes one wireless unit (10, 12, 14, 34, 36, 38, 40) from another when the patient identification field (82), the service type field (84) and the point type field (88) are identical.

Abstract: A communication system is provided that can be added to a legacy alarm system to provide a plurality of communication modes to a remote server system from the legacy alarm system and provide remote control and monitoring to a user of the system via two-way communication links. The communication system can be configured to communicate with an alarm processor of the legacy alarm system through use of a keypad bus typically used by the legacy alarm system for communications between the alarm processor and one or more keypads. Communication modes that can be provided by embodiments of the present invention can include, for example, communication over a public switched telephone network, cellular transmission, broadband transmission, wireless broadband, and the like. The communication system can monitor all configured communication modes and determine which communication mode is the best for providing communication between the alarm system and the remote server.

Abstract: Disclosed are methods and apparatuses for managing other apparatuses. In certain aspects, an apparatus for managing other apparatuses includes a processing system configured to receive one or more reports from the other apparatuses, and to send a message to at least one of the other apparatuses, wherein the message instructs the at least one of the other apparatuses to configure at least one parameter that controls when the at least one of the other apparatus sends a report to the apparatus.

Abstract: A sensor system includes a sensor unit which has a pressure sensor, a temperature sensor and a selector switching between a pressure detection signal and a temperature detection signal. The sensor system further includes a processing unit which outputs a switching command signal to the selector and receives a detection signal from the sensor unit. The switching command signal is transmitted through a communication line and the detection signal is transmitted through a signal line. The detection signal is transmitted to the processing unit in a form of an analog signal.

Abstract: A sensing network is described, consisting of a multiplexing reader and one or more sensor pairs, each sensor pair comprising a transponder and a dedicated reader, dedicated to that transponder, each transponder having a sensor. Each sensor pair is able to wirelessly interface and power both capacitive and resistive sensors at a short distance with high efficiency. By providing a dedicated reader for each transponder, each link can be optimized and there is no need for the dedicated reader to distinguish between signals from other transponders. The transponder generates an analog signal directly using a sensor or analog memory value and sends it by modulation to the dedicated reader. So, the dedicated readers do not need to have circuitry to demodulate a digital signal or ID code. The transponder includes the sensors and their electronic circuits and can be optionally remotely powered by the dedicated reader through the wireless link. The expected consumption of the dedicated reader can be lower than 200 ?W.

Abstract: A semiconductor substrate integrated electronic circuit includes a transmitter block and a receiver block connected through a communication network (4). A data signal having a transmission period is generated on a first line that is received by the receiver block. A congestion signal is generated on a second line from the receiver block to the transmitter block when a congestion event of the receiver block occurs in order to interrupt the data signal transmission. A synchro signal is generated on a third line starting from the transmitter block, this synchro signal indicating to the receiver block that the data signal comprises a new datum. The congestion signal also interrupts the synchro signal transmission when a congestion event of the receiver block occurs.

Abstract: An apparatus and method for context awareness by detecting intentions of a user in the ubiquitous environment using context information which is created by analyzing real world data collected from sensors are provided. The apparatus is configured of a sensor platform, a context-aware agent and a service provider. The sensor platform collects data of real world and transmits the collected data to the context-aware agent. The context-aware agent integrates the data of real world from the sensor platform, and stores and manages context information according to the integrated data. The service provider automatically controls objects to perform necessary operations to provide a predetermined intelligent services according to the context information received from the context-aware agent.

Abstract: The number of devices installed in an Authorized Domain is controlled by a master device functionality. This master devices stores ceiling values for the total number Totaljimit of devices to be installed in the AD; the total number Localjimit of devices to be installed in a local proximity with the master device and the total number Remotejimit of devices to be installed remotely from said master device. The master device also stores current values of the number Local_count of devices installed in the AD in local proximity with the master device; and the number Remote_count of devices installed in the AD remotely from said master device. When a new device is to be installed in the AD, the ceiling values are checked with respect to the current values and it is checked whether the device is in local proximity with the master device to authorize or not its installation in the AD, either locally or remotely.

Abstract: An apparatus to provide an always-on monitor, alert, control, and share (MACS) device comprising a connection to receive intermittent updates from a real sensor device, the always-on virtual MACS device corresponding to the real sensor device, and a presentation layer to enable a user to interface with the always-on virtual MACS device, the always-on virtual MACS device providing data regardless of the status of the real sensor device.

Abstract: Embodiment for forming an aggregate signal from a plurality of starting signals, comprising: acquiring said starting signals through respective sensors of a homogeneous sensors group; converting acquired signals in respective digital signals having data represented with a predetermined bits number; processing the digital signals to form aggregate signal. The processing step comprises the operations of: modifying digital signals changing the data format of each such digital signals from a first format to a second format, each data in the second format having been obtained from a respective data in the first format through an operation of permuting the bits position according to a permutation scheme associated with said data and to the specific digital signal comprising that data; forming aggregate signal obtaining said aggregate signal data by means of a bitwise logic operator acting upon said modified digital signal respective data.

Abstract: The circuit monitoring device is disclosed. The device is for monitoring circuit resistance. At configurable thresholds digital flags are triggered, the device can be used as a Security/Building management system. The device uses open technology is fully scaleable and allows programmable logic controllers to be used as security management systems. Using a soft logic option a PC could take the place of the PLC.

Abstract: A system for control of apparatuses, in particular of industrial apparatuses, comprising a plurality of interfaces (20), each dedicated to a connection with a respective apparatus (10) to be monitored, and a processing unit (40) to control the apparatuses (10); the processing unit (40) is provided with first receiving means (41) to receive at least one data item from an apparatus (10), a first selection block (42) to select one or more addressees, depending on the received data item, a second selection block (43) to select one or more communication channels (50) for connection with said addressees, and first transmission means (44) to send at least one notification signal representative of the received data to the addressees through the selected communication channel/channels (50).

Abstract: A method for use in a power line communication systems for an electrical distribution system (1) to quickly and accurately poll electrical meters (6) installed at user facilities to determine if an outage has occurred at a facility. An outbound communications message is transmitted to the meter at the facility requesting a short response consisting of a bit pattern that is either partially or completely known to the receiver. Any perceived response from the meter is then processed to ascertain whether or not the meter actually transmitted a message. Receipt of a message indicates that an outage has not occurred at that site, while an indication the message was not received indicates an outage has likely occurred. In processing the received message, two types of errors can potentially occur; i.e., a false positive or a false negative.

Abstract: A system and methods for enabling a client terminal to simultaneously access a plurality of remote building security panels are disclosed. The system enables a building operator to remotely login to a server and to monitor and control the sensors of the security systems of a plurality of secured buildings. The system in one embodiment includes a database controller, an interface provider, and an alarm receiver. The alarm receiver sends and receives data to and from each building security system. The database controller stores data received by the alarm receiver from each building security system in a database and stores a plurality of command requests for causing remote security panels to execute a plurality of commands, and the interface module enables a remote operator to input commands and requests to query the database, monitor each building security system, and control individual sensors or actuatable security devices.

Abstract: Provided is a distributional alert system using a ubiquitous sensor network (USN). When a disaster occurs, the distributional alert system detects it in a sensor node, informs the area where the disaster occurs of danger through an actuator, such as siren, or informs a management system of the danger through a wired/wireless network. The distributional alert system includes: a first sensor node for generating sense data by sensing surroundings with a sensor therein, determining whether a disaster occurs by analyzing the sense data, and creating and transmitting emergency data based on the determination result, while forming a sensor network; and an alerting node for receiving emergency data from the first sensor node on the sensor network, and outputting disaster circumstantial information to a sensor field of the sensor network upon receipt of the emergency data.

Abstract: In an example embodiment, an apparatus such as an RFID tag, is configured to operate in a first mode that allows the tag to associate with the network and receive configuration data and to operate in a second mode wherein the apparatus is not associated with the network. The apparatus sends announcement packets while in the second mode in accordance with the configuration data received while in the first mode of operation.

Abstract: A system for customizing indicator information for displaying status information to a user includes a receiver for receiving status information from each of a plurality of devices, and assigning the status information to one of a plurality of classes to generate class information. Each of the plurality of classes is associated with a different characteristic of the plurality of devices. The system includes a plurality of manipulators for altering attributes of the class information for at least one of the plurality of classes. The system includes a logical combiner for combining class information into a plurality of combinational groups to customize the content of indicator information in each of the plurality of combinational groups, each combinational group formed according to a predetermined function. The system can include an information sequencer for modifying the order of indicator information from the plurality of combinational groups to generate a stream of indicator information.

Abstract: A resuscitation team mobilization system, device and method are disclosed that minimize the delays frequently associated with responding to a resuscitation emergency. In one preferred embodiment, the system comprises a control station[50] and a plurality of responder mobilization devices [30]. Each responder mobilization device is mounted on to a resuscitation trolley. In one preferred embodiment, the responder mobilization device[30] comprises a communications unit[32] and a mobilization activation means [34]. During a resuscitation event, the user actuates the mobilization activation means[34] to mobilize of a resuscitation team. In response to the actuation of the mobilization activation means[34], the communications unit[32] contacts the control station[50] to mobilize the resuscitation team.

Abstract: Systems and methods for forming a local network (150) include determining which controllable (120) and controlling (170, 180) devices are located within a local area (110). A controller (130) is configured to communicate with the controllable and controlling devices and to include local devices to the local network (150) associated with the local area, while preventing remaining devices from being associated with the local network. The controller may be further configured to automatically reconfigure itself and/or the local controlling device(s) to properly be commissioned to control the local controllable device(s), such as based on the number and/or type of the local controlling devices allowed to join the local network. The controller distinguishes and determines the local controllable and controlling devices by RF signals, IR signals and/or sonar signals, such as based on time of flight and received signal strength of the RF signals.

Abstract: A method for receiving a broadcasting signal and a broadcasting signal receiver are disclosed. Even when a cell is changed while an emergency alert is output, the emergency alert can be continuously output using emergency alert table information included in the broadcasting signal and channel information of the cell. The emergency alert table information may include a cell identifier and the channel information of the cell may include virtual channel information of the cell.

Abstract: A data processing system for analyzing customer and employee interactions in a service establishment is disclosed. The data processing system comprises a plurality of remote customer, employee units and a central unit. The units each include a transceiver to send and receive signals. The signals are all received by the central unit and relayed to the appropriate unit. The central unit time stamps and records all signals in a database. The system further comprises an evaluation program which analyzes the signal data to provide employee performance ratings and staffing recommendations.

Abstract: A data processing system for analyzing customer and employee interactions in a service establishment is disclosed. The data processing system comprises a plurality of remote customer, employee units and a central unit. The units each include a transceiver to send and receive signals. The signals are all received by the central unit and relayed to the appropriate unit. The central unit time stamps and records all signals in a database. The system further comprises an evaluation program which analyzes the signal data to provide employee performance ratings and staffing recommendations.

Abstract: A method is provided of connecting a device (101) having a limited user interface to a predetermined one of a plurality of available networks. The method comprises trying each of the available networks in turn from the device until an indication (160) is provided from a component (150) of the predetermined network in response to said trying that confirms that the predetermined network has been reached. In response to such an indication (160) being provided, the device (101) is connected to the predetermined network if not already so connected as part of said trying.

Abstract: Information related to a vehicular environment is disseminated in a multi-hop broadcast network of nodes. Vehicles and roadside units are equipped with the nodes. An event is sensed at a location by a source node. In response, zones are associated with respect to the location of the source node. Each zone is logically asymmetric and disjoint from the other zones. An alert message is broadcast, received, and then rebroadcast by other vehicles according to the locations of the vehicles in the zones. The nodes can also disseminate witness information.

Abstract: A monitoring system for detecting faults in an apparatus, such as a ski lift, employs a communication network onto which a sensor bus controller periodically transmits a safety message and receives a echo of each safety message. Different sensors are coupled to sensor adapter modules that in turn are connected in a series to the communication network. After the last sensor adapter module in the series, each safety message is echoed back along the communication network. Each sensor adapter module, upon receiving a safety message, increments a count in that message and transmits the resultant safety message to another module. When a sensor indicates a fault condition, the associated sensor adapter module blocks propagation of safety messages along the communication network. The sensor bus controller determines, in response to a failure to receive the echo and to the count in the echo, whether a fault occurred.

Abstract: A plurality of modules interact to form an adaptive network in which each module transmits and receives data signals indicative of proximity of objects. A central computer accumulates the data produced or received and relayed by each module for analyzing proximity responses to transmit through the adaptive network control signals to a selectively-addressed module to respond to computer analyzes of the data accumulated from modules forming the adaptive network. Interactions of local processors in modules that sense an intrusion determine the location and path of movements of the intruding object and control cameras in the modules to retrieve video images of the intruding object. Multiple operational frequencies in adaptive networks permit expansions by additional networks that each operate at separate radio frequencies to avoid overlapping interaction. Additional modules may be introduced into operating networks without knowing the operating frequency at the time of introduction.

Abstract: A network operation center for a light management system having networked intelligent luminaire managers. A plurality of networked luminaire managers, each collocated with a respective luminaire, monitor the status of their respective luminaires. The luminaire managers include transmitters for transmitting status information about their respective luminaires and third-party devices to a network server. The network server forwards the received status information from the networked luminaire managers to a computer of an owner/operator of the plurality of luminaires and/or a third-party user. The luminaire managers communicate with each other, whereby they form a network.

Abstract: A method and apparatus of identifying a plurality of devices connected along a common communications link is disclosed. A control station scans the devices by sending a succession of interrogation signals along the communication link, the interrogation signals comprising a representation of the identification numbers of the devices. A first scan is carried out with interrogation signals identifying a first level of the range of identification numbers, and each device is programmed to generate, and to send to the control station, a response signal that comprises its complete identification number and a checksum, upon receipt of a scan signal applicable thereto. Successive scans are carried out by the control station, adding the next higher level of the range of identification numbers, wherein upon completion of a scan that does not give rise to invalid responses, the previously-paused scan is resumed.

Abstract: A terrestrial digital television receiver includes a tuner, a demodulator, a demultiplexer, a decoder, and a controller. The tuner receives a terrestrial television signal having an emergency alert table which contains text representing an emergency alert message. The demodulator demodulates the television signal and the demultiplexer demultiplexes the emergency alert table from the demodulated signal. The decoder parses the text data representing the emergency alert message, and the controller control operation of a display device such that the emergency alert message is scrolled across a predetermined portion of a video screen.

Abstract: A security system with processing optimized for monitoring the actions of a surveillance subject and detecting abnormal actions. The action record of an individual is monitored using a sensor network security system SNS, and the development of an action event is reported as an action, and the corresponding processing of the security system SCS is determined based on this action.

Abstract: In an embodiment, an apparatus, method, and/or system support a service request made by a computer user in an Internet café or similar electronic service environment. A user may operate a café-provided user terminal in a multi-terminal network controlled by a café service console. The user may operate a switch on the terminal to transmit a service request to the service console. A visible and/or audible indication may be provided to the user, via a suitable indicator on the terminal, regarding the status of the user's service request. The user's service request may be transmitted to, and the indication may be received by, suitable terminals of an input/output module located in the user terminal. Other embodiments are described and claimed.

Abstract: Systems and methods for providing expanded compatibility in identification tags such as RFID (Radio Frequency Identification) devices. Integrated devices can be equipped with various combinations of passive and active tags configured for compatibility with passive and active readers, respectively. Additionally, the integrated devices can be equipped with various combinations of passive and active tag readers for compatibility with passive and active tags, respectively. A first combination comprises an active tag and a passive tag reader for collecting information over a passive channel, and sending the information over an active channel. A second combination comprises an active tag and a passive tag receiver/transceiver for communication over both active and passive channels. A third combination comprises an active tag and an active tag reader for collecting information over an active channel, and sending information over an active channel.

Abstract: An indicating circuit for indicating network status includes a signal generating unit configured for being set in a kernel board, and an indicator circuit configured for being set in a device board. The signal-generating unit includes a logic circuit with two input terminals and an output terminal, a network IC with two output pins connected to the two input terminals of the logic circuit respectively for sending status signals to the logic circuit, and a micro control unit (MCU) for transmitting a network transmitting speed signal from the network IC. The indicator circuit has two input terminals, one is connected to the MCU of the signal-generating unit to receive the network transmitting speed signal and the other is connected to the output terminal of the logic circuit to receive a status signal for indicating the network status.

Abstract: The present technique relates to the distribution of power and data signals throughout a networked system. For example, three-phase power may be conducted to a device over a set of conductors. One of the conductors, however, may be configured to conduct, in conjunction with a neutral conductor, both one phase of three-phase power as well as data signals in accordance with a predetermined data communications protocol. As an alternate example, the present technique may comprise a set of a first power conductors configured to conduct three-phase power and a secondary power conductor which works in conjunction with an auxiliary conductor to conduct power and data-signals. Additionally, the present technique provides for the maintenance data communications and a level of power upon the interruption of three-phase power to a particular component or device.

Abstract: The Wireless Integrated Network Sensor Next Generation (WINS NG) nodes provide distributed network and Internet access to sensors, controls, and processors that are deeply embedded in equipment, facilities, and the environment. The WINS NG network is a new monitoring and control capability for applications in transportation, manufacturing, health care, environmental monitoring, and safety and security. The WINS NG nodes combine microsensor technology, low power distributed signal processing, low power computation, and low power, low cost wireless and/or wired networking capability in a compact system. The WINS NG networks provide sensing, local control, remote reconfigurability, and embedded intelligent systems in structures, materials, and environments.

Abstract: Methods and systems are provided for monitoring an automatic door system. In one embodiment, an automatic door system may include a door system controller coupled to one or more input devices. The door system controller may be configured to receive data representative of an operational parameter of the automatic door system. At least one monitor display may be operably coupled to the door system controller and configured to display information regarding the operational parameter of the input devices. A remote display device interface may be configured to operably couple at least one remote display device to the door system controller. The at least one monitor display may be configured to automatically change from a master configuration to a slave configuration when the at least one remote display device is operably coupled to the door system controller.

Abstract: A system for displaying chassis component information includes a chassis and a plurality of server blades each coupled to the chassis. Each server blade comprises a respective liquid crystal display (LCD) positioned upon the server blade. The respective LCD is operable to display chassis component information.

Abstract: An event notification device notifies an event occurring in it to a plurality of client devices via a network. A receiving unit receives a request from a client device indicating an event to be monitored. An adding unit adds information about the client device from where the request is received and the event mentioned in the request, an event monitoring unit monitors events occurring in the event notification device based on setting information, and an event notifying unit notifies to the client device from where the request is received that the event mentioned in the request has occurred when the event mentioned in the request occurs.

Abstract: Slaves are respectively provided corresponding to electric devices, measure, in real time, power usage states and disposed positions of the electric devices to transmit to a master. The master detects operational states of electric devices on operation based on power usage states received from the slaves, and detects a positional relation between electric devices on operation based on disposed positions of the electric devices. Then, the master estimates the number of residents in the house by determining achievability of operational states of electric devices based on the detected operational states and positional relation of electric devices.

Abstract: A method for grouping sensor nodes in heterogeneous wireless sensor networks has a sensor network management system. The method includes: receiving a group forming code from the sensor network management system at the respective sensor nodes, wherein the group forming code have sensor conditions and selecting group information from the group forming code in accordance with the conditions at the respective sensor nodes. The method further includes transmitting the selected group information IDs to the sink node.

Abstract: A system for wirelessly monitoring a plurality of parameters is disclosed. A first remote transceiver is attached to at least one first sensor for monitoring one of the parameters and a second remote transceiver is attached to at least one second sensor for monitoring another of said parameters. The system includes a base station transceiver. The first and second remote transceivers reach periodically report normal operating conditions to the base station transceiver. The first remote transceiver reports abnormal sensor readings with no substantial delay after occurrence. The second remote transceiver reports abnormal sensor readings a predetermined length of time after occurrence.

Abstract: A setting device used in an illumination control system to realize a separate control, a group control, and a pattern control is disclosed. The object of the present invention is to enable a setting operation to be performed easily, and to prevent missing. In connection with the switch arranged on a wall side, the setting device sets a separate address of the separate control, a group number of the group control, and a pattern number of the pattern control by using an infrared ray communication. On the other hand, the corresponding relationships between each switch and the relay controlling the load actually is established by mounting the setting device on the operation terminal, and connecting it to the transmission unit via the communication line. Accordingly, it is possible to perform a setting operation easily by performing two kinds of setting as one pair. Further, missing can be prevented by mounting the movable setting device on the operation terminal arranged on the wall side.

Abstract: A collaborative wireless micro-control system applied to a detached space comprises a main control unit, and a plurality of interior control unit. Wherein, the main control unit has a microprocessor, a transmitter, and a receiver. The receiver receives the outside wireless signal from the electronic apparatus. The microprocessor parses the outside wireless signal and sends out a wireless control signal inside the detached space by using the transmitter. Each of the interior control units has a microprocessor, a transmitter, and a receiver. The control unit is utilized as a user interface (human machine interface) for controlling a respective electronic apparatus. The receiver of the interior control unit receives the wireless control signal from the main control unit. The microprocessor of the interior control unit tells whether the wireless control signal can trigger the respective electronic apparatus or not.

Abstract: A printing system is provided including a plurality of printing devices. Each printing device includes an associated radio frequency identification (RFID) device. The RFID device associated with a first printing device of the plurality of printing devices is operable to sense the presence of an RFID device associated with a second printing device of the plurality of printing devices for sensing the presence of the second printing device.

Abstract: The present disclosure generally pertains to systems and methods for communicating messages in wireless networks. In one exemplary embodiment, a wireless sensor network has a first node and a second node. The second node is configured to wirelessly transmit a message through a channel of the wireless sensor network to the first node. The second node is further configured to determine whether to retransmit the message through the channel of the wireless sensor network to the first node based on an amount of energy detected for the channel by the second node immediately after transmission of the message by the second node.

Abstract: A method of processing a broadcast signal relevant to an emergency alert and a broadcast receiver for the same are disclosed, by which information on a channel for carrying an emergency alert broadcast can be prevented from being overlapped with information on other general channels. The present disclosure generating an emergency alert table including frequency information of an emergency alert channel, and transmitting a digital broadcasting signal including the emergency alert table, wherein the frequency information of the emergency alert channel is inserted in a descriptor that provides an additional pointer to the emergency alert channel, wherein the descriptor references the emergency alert channel by means of the frequency information.