The present invention generally relates to wireless communication, more particularly, relates to recovery from beam failure in a wireless access network where beamforming technique is used in communication between network elements. According to one aspect of the present invention, there is provided a method for recovery from beam failure in a wireless access network accessed by a user equipment (UE). The method comprises: at the wireless access network, determining whether the beam failure occurs on the basis of presence of a response from the UE during communicating between the wireless access network and the UE via a first beam; and if it is determined that the beam failure occurs, communicating with the UE via an available beam selected from the first beam and one or more second beams.

The present invention relates to a wireless communication system. Specifically, the present invention relates to a method for transmitting, by a terminal, an HARQ-ACK in a CA wireless communication system and a device therefor, the method comprising the steps of: receiving a first PDCCH including a first DAI and a second DAI within SF #nk; configuring an HARQACK payload using the first DAI and the second DAI; and transmitting the HARQ-ACK payload in SF on, wherein the value of the first DAI indicates the order values of scheduling of cell/SF units associated with the first PDCCH in SF #nk, the order values of scheduling of cell/SF units are counted in a manner in which priority is given to cells in the cell/SF domain, and the value of the second DAI corresponds to a value obtained by accumulating the numbers of cells scheduled for the terminal by a DG DCI in each SF from the first SF to the SF, in which the first PDCCH is received, within SF #nk (k#K).

A resource scheduling method of a wireless communication system is provided. The resource scheduling method includes the following steps. Each of the user equipment (UEs) is classified by a centralized scheduler as a cell-edge UE or a non cell-edge UE. A first scheduling is performed by the centralized scheduler by allocating a first resource for the cell-edge UEs, a second resource for the non cell-edge UEs, and a third resource for retransmission of at least one of the cell-edge UEs. A second scheduling is performed by a distributed scheduler by allocating a first part of the second resource for at least one of the non cell-edge UEs.

A resource scheduling method of a wireless communication system is provided. The resource scheduling method includes the following steps. Each of the user equipment (UEs) is classified by a centralized scheduler as a cell-edge UE or a non cell-edge UE. A first scheduling is performed by the centralized scheduler by allocating a first resource for the cell-edge UEs, a second resource for the non cell-edge UEs, and a third resource for retransmission of at least one of the cell-edge UEs. A second scheduling is performed by a distributed scheduler by allocating a first part of the second resource for at least one of the non cell-edge UEs.

According to an embodiment of the present invention, a method for performing a feedback for an evolved-multimedia broadcast multicast service (E-MBMS) by a terminal in a wireless communication system may comprise the steps of: receiving the E-MBMS from a base station; and transmitting feedback information for the E-MBMS in an uplink subframe, wherein the terminal operates in an RRC idle state.

According to an embodiment of the present invention, a method for performing a feedback for an evolved-multimedia broadcast multicast service (E-MBMS) by a terminal in a wireless communication system may comprise the steps of: receiving the E-MBMS from a base station; and transmitting feedback information for the E-MBMS in an uplink subframe, wherein the terminal operates in an RRC idle state.

A wireless device may receive one or more radio resource control (RRC) messages. The RRC messages may indicate a first transmission and reception point (TRP) of a cell, a second TRP of the cell, and one or more first beam failure recovery parameters indicating one or more first reference signals for first TRP. The wireless device may determine a first beam failure of the first TRP based on the one or more first reference signals indicated by the one or more first beam failure recovery parameters. The wireless device may transmit an uplink signal via the second TRP of the cell indicating a link recovery request for the first TRP. The wireless device may receive an uplink grant for uplink data. The wireless device may transmit the uplink data indicating a candidate beam of the first TRP.

Provided is a method for correcting errors in a data transmission network, comprising: transmitting a plurality of uncoded information packets across a network path; transmitting a plurality of coded packets for recovering information packets lost in transmission across said network path, the coded packets being temporally interspersed among said uncoded information packets, wherein the coded packets are encoded based on information packets transmitted prior to a previously transmitted coded packet; and determining the interspersion of the coded packets according to a packet loss rate.

The present disclosure discloses a communication method, an apparatus, and a system. The communication method includes: receiving, by a base station, uplink data sent by a terminal device; decoding the uplink data; and sending, by the base station, feedback information of the uplink data. The feedback information is used to indicate a decoding status of the uplink data, and carries information about an identifier. The identifier includes an identity of the terminal device or an identifier of the uplink data. In this way, the terminal device is prevented from receiving incorrect feedback information during conflicting transmission.

The present disclosure discloses a communication method, an apparatus, and a system. The communication method includes: receiving, by a base station, uplink data sent by a terminal device; decoding the uplink data; and sending, by the base station, feedback information of the uplink data. The feedback information is used to indicate a decoding status of the uplink data, and carries information about an identifier. The identifier includes an identity of the terminal device or an identifier of the uplink data. In this way, the terminal device is prevented from receiving incorrect feedback information during conflicting transmission.