A method and apparatus for providing an ETWS message to a wireless transmit receive unit (WTRU). The WTRU is configured to receive a paging message indicating a change in system information, wherein in response to the paging message to receive a system information block (SIB) 1 to determine a schedule for reception of earthquake and tsunami warning system (ETWS) information in system information blocks (SIBs). The WTRU is further configured to receive the SIBs with the ETWS information and to separately receive segments of an ETWS message and to combine the segments to reproduce the ETWS message.

A method and apparatus for providing an ETWS message to a wireless transmit receive unit (WTRU). The WTRU is configured to receive a paging message indicating a change in system information, wherein in response to the paging message to receive a system information block (SIB) 1 to determine a schedule for reception of earthquake and tsunami warning system (ETWS) information in system information blocks (SIBs). The WTRU is further configured to receive the SIBs with the ETWS information and to separately receive segments of an ETWS message and to combine the segments to reproduce the ETWS message.

An apparatus and method for broadcast signal frame using layered division multiplexing are disclosed. An apparatus for generating broadcast signal frame according to an embodiment of the present invention includes a combiner configured to generate a multiplexed signal by combining a core layer signal and an enhanced layer signal at different power levels; a power normalizer configured to reduce the power of the multiplexed signal to a power level corresponding to the core layer signal; a time interleaver configured to generate a time-interleaved signal by performing interleaving that is applied to both the core layer signal and the enhanced layer signal; and a frame builder configured to generate a broadcast signal frame including a preamble for signaling, size information of Physical Layer Pipes (PLPs) and time interleaver information shared by the core layer signal and the enhanced layer signal.

A digital receiver includes a pre-de-interleaver processing block for receiving a receive signal including reception data units quantized using a quantization rule. The digital receiver additionally includes a controllable compressor for compressing the data units into a compressed representation, a controllable time-de-interleaver being configured for applying a varying interleaving size in data units, and a controller for controlling the controllable processor or the controllable time-de-interleaver. The controller is configured for controlling the compressor or the time-de-interleaver so that a higher interleaving size such as a higher interleaving time or a higher number of data units per second is applied, when a compression in a lower number of bits is active.

A digital receiver includes a pre-de-interleaver processing block for receiving a receive signal including reception data units quantized using a quantization rule. The digital receiver additionally includes a controllable compressor for compressing the data units into a compressed representation, a controllable time-de-interleaver being configured for applying a varying interleaving size in data units, and a controller for controlling the controllable processor or the controllable time-de-interleaver. The controller is configured for controlling the compressor or the time-de-interleaver so that a higher interleaving size such as a higher interleaving time or a higher number of data units per second is applied, when a compression in a lower number of bits is active.

A user equipment (UE) in a wireless communication system is described. The UE includes a receiver, a processor and a transmitter. The receiver is configured to receive a multimedia broadcast multicast service (MBMS) counting request message through a first cell of a network. The processor is configured to determine whether or not to transmit a MBMS counting response message in response to the MBMS counting request message. The transmitter is configured to transmit the MBMS counting response message if it is determined to transmit the MBMS counting response message. The processor is further configured to determine to transmit the MBMS counting response message if a registered-public land mobile network (R-PLMN) identity is included in system information broadcast by the network.

A user equipment (UE) in a wireless communication system is described. The UE includes a receiver, a processor and a transmitter. The receiver is configured to receive a multimedia broadcast multicast service (MBMS) counting request message through a first cell of a network. The processor is configured to determine whether or not to transmit a MBMS counting response message in response to the MBMS counting request message. The transmitter is configured to transmit the MBMS counting response message if it is determined to transmit the MBMS counting response message. The processor is further configured to determine to transmit the MBMS counting response message if a registered-public land mobile network (R-PLMN) identity is included in system information broadcast by the network.

A transmitting/receiving system and a data processing method of the same are disclosed herein. The receiving system may include a receiving unit, a first processing unit, and a second processing unit. The receiving unit receives a broadcast signal including mobile service data from at least one slot. The first processing unit acquires FIC segments divided from an FIC chunk of at least one sub-frame. Herein, each FIC segment comprises a 2-byte segment header and a 35-byte segment payload. The segment header includes an FIC type information, a number of a corresponding FIC segment, and a number of a last FIC segment among the FIC segments divided from the FIC chunk. The second processing unit obtains the FIC chunk including signaling information between at least one ensemble and at least one mobile service from respective payloads of the FIC segments, based upon the acquired FIC type information, number of the corresponding FIC segment, and number of the last FIC segment of each FIC segment.

A transmitting/receiving system and a data processing method of the same are disclosed herein. The receiving system may include a receiving unit, a first processing unit, and a second processing unit. The receiving unit receives a broadcast signal including mobile service data from at least one slot. The first processing unit acquires FIC segments divided from an FIC chunk of at least one sub-frame. Herein, each FIC segment comprises a 2-byte segment header and a 35-byte segment payload. The segment header includes an FIC type information, a number of a corresponding FIC segment, and a number of a last FIC segment among the FIC segments divided from the FIC chunk. The second processing unit obtains the FIC chunk including signaling information between at least one ensemble and at least one mobile service from respective payloads of the FIC segments, based upon the acquired FIC type information, number of the corresponding FIC segment, and number of the last FIC segment of each FIC segment.

The present technology relates to a transmission device, a transmission method, a reception device, and a reception method that make it possible to improve transmission efficiency.

Provided is a transmission device including a first time interleaver that performs first time interleaving conforming to a first system, on an error correction code block to be included as a data frame in a physical layer frame, in which the error correction code block conforms to a second system, and when performing the first time interleaving, the first time interleaver applies a pointer indicating an offset of a start position of the error correction code block included at a start of the data frame. The present technology can be applied to, for example, a transmission system compatible with a broadcast system such as an ISDB-T system.