A bearer reconfiguration method performed by a User Equipment (UE) in a wireless communication system supporting a multi-bearer is provided. The bearer reconfiguration method includes, if the UE performs a bearer reconfiguration from a single bearer to the multi-bearer, reordering Packet Data Convergence Protocol (PDCP) Protocol Data Units (PDUs) received through the multi-bearer, using a timer after a completion of the bearer reconfiguration, and processing the reordered PDCP PDUs into at least one PDCP Service Data Unit (SDU). The method may also include, if the UE performs bearer reconfiguration from the multi-bearer to the single bearer, reordering PDCP PDUs received through the multi-bearer, using a timer until a predetermined condition is satisfied, and processing the reordered PDCP PDUs into at least one PDCP SDU.

A distributed antenna system is provided that frequency shifts the output of one or more microcells to a 60 GHz or higher frequency range for transmission to a set of distributed antennas. The cellular band outputs of these microcell base station devices are used to modulate a 60 GHz (or higher) carrier wave, yielding a group of subcarriers on the 60 GHz carrier wave. This group will then be transmitted in the air via analog microwave RF unit, after which it can be repeated or radiated to the surrounding area. The repeaters amplify the signal and resend it on the air again toward the next repeater. In places where a microcell is required, the 60 GHz signal is shifted in frequency back to its original frequency (e.g., the 1.9 GHz cellular band) and radiated locally to nearby mobile devices.

A distributed antenna system is provided that frequency shifts the output of one or more microcells to a 60 GHz or higher frequency range for transmission to a set of distributed antennas. The cellular band outputs of these microcell base station devices are used to modulate a 60 GHz (or higher) carrier wave, yielding a group of subcarriers on the 60 GHz carrier wave. This group will then be transmitted in the air via analog microwave RF unit, after which it can be repeated or radiated to the surrounding area. The repeaters amplify the signal and resend it on the air again toward the next repeater. In places where a microcell is required, the 60 GHz signal is shifted in frequency back to its original frequency (e.g., the 1.9 GHz cellular band) and radiated locally to nearby mobile devices.

Embodiments of the disclosure provide application layer, Medium Access Control (MAC) layer, and physical (PHY) layer functionality by discrete devices, to form a distributed MAC/PHY architecture for communications networks. An application layer (layer-3) device can communicate with a MAC layer (layer-2) device. The layer-2 device may switch IP layer (layer-3) information to MAC layer information. Further the layer-2 device can use addressing information determined or received from the layer-3 device to choose a particular PHY layer (layer-1) device. The layer-2 device can instruct the layer-1 device, to modulate information on one or more frequencies and/or wavelengths over a given physical medium. In an embodiment, the various communications between the devices can occur using a downstream external PHY interface (DEPI) protocol and an upstream external PHY interface (UEPI) protocol. In an embodiment, the monitoring of the devices can be performed using a management plane generic control plane (GCP) protocol.

A distributed antenna system is provided that frequency shifts the output of one or more microcells to a 60 GHz or higher frequency range for transmission to a set of distributed antennas. The cellular band outputs of these microcell base station devices are used to modulate a 60 GHz (or higher) carrier wave, yielding a group of subcarriers on the 60 GHz carrier wave. This group will then be transmitted in the air via analog microwave RF unit, after which it can be repeated or radiated to the surrounding area. The repeaters amplify the signal and resend it on the air again toward the next repeater. In places where a microcell is required, the 60 GHz signal is shifted in frequency back to its original frequency (e.g., the 1.9 GHz cellular band) and radiated locally to nearby mobile devices.

The present invention provides a method for user equipment receiving multi-flow data with respect to one evolved packet system (EPS) bearer through a macro base station (macro eNB) and a small base station (small eNB) in a wireless communication system supporting dual connectivity. The method comprises the steps of: a packet data convergence protocol (PDCP) entity of the user equipment receiving PDCP packet data units (PDU) through the macro base station and the small base station from a PDCP entity of the macro base station; obtaining PDCP service data units (SDU) corresponding to PDCP PDUs; and receiving from the macro base station information related to a sequence timer for the PDCP SDUs through a radio resource control (RRC) message, wherein the PDCP SDUs are indicated by a predefined PDCP sequence number (SN).

If a wireless connection with an external device is disconnected, it is determined whether or not the disconnection is based on a request from the external device. Different methods for displaying a screen indicating the disconnection are used in the case where it is determined that the disconnection is based on a request from the external device and the case where it is not. Accordingly, it is possible to realize an electronic device that performs suitable indication to a user and a method for controlling the same.

The present invention relates to a wireless access system supporting a machine-type communication (MTC), and particularly, provided are a method for repeatedly transmitting a physical broadcast channel (PBCH) for an MTC, and apparatus for supporting same. The method for repeatedly transmitting a PBCH for an MTC terminal in a wireless access system supporting MTC according to one embodiment of the present invention may comprise the steps of: transmitting a first PBCH by means of a legacy PBCH transmission region of a first subframe; repeatedly transmitting a second PBCH from the first subframe; and repeatedly transmitting a third PBCH from a second subframe. Here, the present invention can be structured so that the second PBCH and third PBCH are not repeatedly transmitted in the control regions of the first subframe and second subframe.

Methods and apparatus are described by which a wireless station transmits information to an access point in response to a short feedback request. The response to the short feedback request is transmitted as either energy or lack thereof in one or more long training fields transmitted in a preamble of a physical layer packet. Short feedback trigger frames for requesting the short feedback are also described.

A ranging or sensing method comprising performing clear channel assessment (CCA) on an ultra-wideband (UWB) channel to obtain first indication information, where the first indication information indicates at least two first idle time segments in one time unit; and sending at least one segment signal of a first UWB signal in a first target idle time segment in each time unit, where the first UWB signal is for performing data measurement, and the at least two first idle time segments include the first target idle time segment.