Systems and methods are disclosed herein for providing adaptive service areas for multicast session continuity. Embodiments of a method performed by a radio access node in a Radio Access Network (RAN) are disclosed. Such embodiments introduce mobility of User Equipments (UEs) participating in a multicast/broadcast service, which is managed by the RAN. This means that the broadcast area will dynamically adapt as participating UEs move and/or radio conditions change.

Systems and methods are disclosed herein for providing adaptive service areas for multicast session continuity. Embodiments of a method performed by a radio access node in a Radio Access Network (RAN) are disclosed. Such embodiments introduce mobility of User Equipments (UEs) participating in a multicast/broadcast service, which is managed by the RAN. This means that the broadcast area will dynamically adapt as participating UEs move and/or radio conditions change.

A user equipment (UE) is configured to receive physical uplink control channel (PUCCH) configuration information associated with PUCCH resource allocation for negative acknowledgement (NACK)-only based hybrid automatic repeat request (HARQ)-acknowledgement (ACK) feedback for multicast broadcast service (MBS), receive a signal from a base station and transmit HARQ-ACK feedback to the base station in response to the signal.

A first network node of a first frequency layer, acquires (201) information on services that are offered by a second network node at a second, different frequency layer. The second network node is within the coverage area of the first network node. The first network node broadcasts (202) a service advertisement message to at least one terminal device (UE) for advertising the services offered by the second network node at the second frequency layer.

A network selects a transmission mechanism for delivering a Point to Multipoint (PTM) compatible service based on cell identification (cell ID) information identifying the serving cells of user equipment (UE) devices interested in receiving the PTM compatible service. In some situations, the cell ID information is obtained by the network using a Multimedia Broadcast Multicast Service (MBMS) counting procedure where cell ID information is requested in a MBMS Counting Request Message and provided by each UE device in a MBMS Counting Response Message.

Methods, systems, and devices for on-demand multicast control channel (MCCH) messages are described. A user equipment (UE) may receive, from a base station, system information indicating an MCCH message configuration. Based on receiving the MCCH message configuration, the UE may transmit a request for an MCCH message. For example, the UE may transmit the request for the MCCH message by a random access preamble or a radio resource control (RRC) message. After transmitting the request, the UE may receive the MCCH message in accordance with the MCCH message configuration. That is, the base station may receive the request and transmit the MCCH message in response to the request. The MCCH message may indicate a multicast service radio bearer (MRB) configuration for receiving multicast traffic. Thus, the UE may receive multicast traffic from the base station in accordance with the MRB configuration.

A system and method for collaborative broadcasting and bi-directional network transmission. Such a system may comprise a broadcast transmission source that uses a one-to-many broadcasting method, a bi-directional network that uses a one-to-one broadcasting method, and a receiver apparatus configured to receive broadcasts from the broadcast transmission source and communicate with the bi-directional network. When the receiver apparatus receives a broadcast from the broadcast transmission source, and when the broadcast is partially damaged or missing, the receiver apparatus is configured to communicate with the bi-directional network and request the damaged or missing data.

Embodiments of the present disclosure provide a method, a user equipment, UE, a network node, and a computer program product for providing multicast and broadcast services, MBS, to one or more User Equipments, UEs, in a wireless communication network. The method is performed by a network node in the wireless communication network. The method comprises determining the one or more UEs in one of: a Radio Resource Control, RRC, IDLE state and a RRC INACTIVE state. The method comprises transmitting a paging message indicating a Point-To- Multipoint, PTM, configuration information to be acquired by the determined one or more UEs for enabling reception of MBS data in one of the RRC IDLE state and the RRC INACTIVE state. Further, the method comprises transmitting the MBS data to the determined one or more UEs using a PTM configuration indicated by the PTM configuration information.

Corresponding base station, UE, and computer program products are also disclosed.

The present disclosure relates to: a communication technique merging IoT technology with a 5G communication system for supporting a data transmission rate higher than that of a 4G system; and a system therefor. The present disclosure can be applied to intelligent services (for example, smart homes, smart buildings, smart cities, smart cars or connected cars, healthcare, digital education, retail, security- and safety-related services, and the like) on the basis of 5G communication technology and IoT technology. Also, proposed in the present disclosure are a method and device in which a terminal properly receives an MBS service in various scenarios.

A method and apparatus for switching between unicast and multicast by considering degraded user experience in a wireless communication system is described. A CU of a RAN node receives, from the DU, a first switching message including status of the MBS for each of the first wireless device and the second wireless device. A CU of a RAN node determines to switch the first transmission to a third transmission only for the first wireless device for the MBS, based on the received status of the MBS.