Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a notification of a change to multicast broadcast (MB) control information associated with at least one MB service to which the UE is subscribed, the MB control information being included in an MB control channel (MBCCH) scheduled by a physical downlink control channel (PDCCH) communication addressed to an MB radio network temporary identifier (MB-RNTI); and monitor one or more resources of the MBCCH to receive updated MB control information based at least in part on receiving the notification of the change to the MB control information. Numerous other aspects are provided.

An apparatus for transmitting a broadcast signal according to an embodiment of the present invention includes a bootstrap generation unit for generating a bootstrap for signaling a system bandwidth field, corresponding to a system bandwidth for a post-bootstrap, and a baseband sampling rate coefficient; a preamble generation unit for generating a preamble located immediately following the bootstrap in a broadcast signal frame; and a payload generation unit for generating one or more subframes located immediately following the preamble in the broadcast signal frame.

A downlink data receiving method, a downlink data sending method, and a device are provided. The downlink data receiving method includes: obtaining a Hybrid Automatic Repeat Request (HARQ) process of an Multicast and Broadcast Service (MBS) service; and receiving downlink data of the MBS service according to the HARQ process. In the embodiments of the present disclosure, a specific MBS service can be sent and retransmitted through a corresponding HARQ process, so that a terminal can combine and decode data repeatedly sent by a network side for a plurality of times.

Disclosed are methods for adjusting cell coverage of a multimedia broadcast multicast service. An example method (700) may include transmitting (701) data of a multimedia broadcast multicast service on a point-to-multipoint channel, monitoring (702) an uplink channel for information on an abnormal reception of the data, and adjusting (703) coverage of the point-to-multipoint channel based on the monitoring. Related apparatuses and computer readable media are also disclosed.

A terminal according to one embodiment of the present invention may: receive multicast configuration information including an indicator indicating whether G-RNTI and HARQ processes related to at least one downlink multicast service are activated; receive DCI in which CRC is scrambled with a G-RNTI on a specific downlink frequency resource; perform decoding of a multicast TB carried by a PDSCH on the basis of the DCI; and transmit and receive information on the decoding result of the multicast TB through a PUCCH resource indicated by the DCI on a specific uplink frequency resource, on the basis of the indicator included in the multicast configuration information indicating activation of the HARQ process.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may determine that a negative acknowledgment (NACK) feedback message for a broadcast/multicast communication is to be transmitted. The UE may transmit the NACK feedback message, via a radio access network (RAN), to a broadcast/multicast control plane function device of a core network based at least in part on determining that the NACK feedback message is to be transmitted. The UE may receive a retransmission of the broadcast/multicast communication based at least in part on transmitting the NACK feedback message. Numerous other aspects are provided.

This disclosure provides methods, devices and systems for reliable delivery of enhanced broadcast services (EBCS) downlink (DL) packets to wireless stations (STAs) that support EBCS (also referred to as “EBCS STAs”) and maintaining interoperability with STAs that do not support EBCS. A wireless communication device may broadcast one or more EBCS DL packets carrying data associated with an EBCS service. In some aspects, the wireless communication device may subsequently transmit a trigger frame soliciting information indicating which, if any, of the EBCS DL packets were missed by EBCS STAs in the vicinity. In some other aspects, each EBCS DL packet may carry signaling indicating that the broadcast data is intended only for EBCS STAs. Still further, in some aspects, the wireless communication device may broadcast an EBCS traffic advertisement indicating a timing of the one or more EBCS DL packets.

A wireless device receives receive, from a base station, radio resource control messages comprising configuration parameters of a first semi-persistent scheduling (SPS) for multicast and broadcast services (MBS), wherein the configuration parameters of the first SPS comprise a first hybrid automatic repeat request acknowledgment (HARQ-ACK) codebook index. The wireless device receives a multicast transport block (TB) based on receiving a group common downlink control information (DCI) indicating an activation of the first SPS. The wireless device transmits first feedback for the multicast TB in a first HARQ-ACK codebook, of HARQ-ACK codebooks, indicated by the first HARQ-ACK codebook index.

The present disclosure relates to a communication method and system for converging a 5.sup.th-Generation (5G) communication system for supporting higher data rates beyond a 4.sup.th-Generation (4G) system with a technology for Internet of Things (IoT). The method includes a method performed by a first terminal in a wireless communication system, comprising obtaining resource pool information associated with a side link, transmitting sidelink control information (SCI) associated with sidelink data on a physical sidelink control channel (PSSCH), and transmitting the sidelink data on a physical sidelink shared channel (PSSCH) based on the SCI. Feedback information associated with the sidelink data is received from a second terminal based on a distance between the first terminal and the second terminal, in case that a zone identity (ID) of the first terminal and information on a range requirement are included in the SCI.

Transmission quality is improved in an environment in which direct waves dominate in a transmission method for transmitting a plurality of modulated signals from a plurality of antennas at the same time. All data symbols used in data transmission of a modulated signal are precoded by hopping between precoding matrices so that the precoding matrix used to precode each data symbol and the precoding matrices used to precode data symbols that are adjacent to the data symbol in the frequency domain and the time domain all differ. A modulated signal with such data symbols arranged therein is transmitted.