A method for supporting activation/deactivation of serving cells by a base station (BS) in a wireless communication system provides decreased overhead and decreased power consumption for a user equipment (UE). The method includes configuring M supportable serving cells in the UE, configuring an indicator indicating activation/deactivation of each of the M serving cells, configuring a medium access control (MAC) message which includes a MAC control element (CE) and a logical channel identifier (LCID), the MAC CE including the indicator configured for each of the M serving cells and having a length corresponding to an integer multiple of 8 bits, the LCID indicating that the MAC CE includes the indicator indicating activation/deactivation of each serving cell, and transmitting the configured MAC message to the UE. Accordingly, a control channel or data channel regarding a component carrier is selectively received depending on whether the component carrier is activated.

A method for supporting activation/deactivation of serving cells by a base station (BS) in a wireless communication system provides decreased overhead and decreased power consumption for a user equipment (UE). The method includes configuring M supportable serving cells in the UE, configuring an indicator indicating activation/deactivation of each of the M serving cells, configuring a medium access control (MAC) message which includes a MAC control element (CE) and a logical channel identifier (LCID), the MAC CE including the indicator configured for each of the M serving cells and having a length corresponding to an integer multiple of 8 bits, the LCID indicating that the MAC CE includes the indicator indicating activation/deactivation of each serving cell, and transmitting the configured MAC message to the UE. Accordingly, a control channel or data channel regarding a component carrier is selectively received depending on whether the component carrier is activated.

A method and apparatus for acquiring a Radio Access Technology (RAT) of a serving cell, a method and apparatus for indicating a RAT of a serving cell, and devices are provided. The method for acquiring a RAT of a serving cell includes: receiving RAT indication information from the relay device, wherein the RAT indication information indicates RAT information of the serving cell where the relay device is located; determining, based on the RAT indication information, a RAT type adopted by a base station to which the serving cell belongs; and communicating with the base station using the RAT appropriate to the RAT type adopted by the base station.

A method and apparatus for acquiring a Radio Access Technology (RAT) of a serving cell, a method and apparatus for indicating a RAT of a serving cell, and devices are provided. The method for acquiring a RAT of a serving cell includes: receiving RAT indication information from the relay device, wherein the RAT indication information indicates RAT information of the serving cell where the relay device is located; determining, based on the RAT indication information, a RAT type adopted by a base station to which the serving cell belongs; and communicating with the base station using the RAT appropriate to the RAT type adopted by the base station.

The present disclosure relates to a communication technique that combines a 5G communication system for supporting a higher data transmission rate than a 4G system with IoT technology, and a system therefor. The present disclosure may be applied to intelligent services (e.g. smart homes, smart buildings, smart cities, smart cars or connected cars, healthcare, digital education, retail businesses, security and safety-related services, etc.) on the basis of 5G communication technology and IoT-related technology. A method performed by a session management function (SMF) entity in a communication system, according to one embodiment of the present disclosure, may comprise the steps of: performing a packet data unit (PDU) session establishment procedure; identifying a QoS flow generated for ultra reliable low latency communication (URLLC) in a PDU session; identifying whether an indicator indicating that the PDU session is an Always-on PDU Session has ever been transmitted to a terminal; and when it is identified that the indicator has not been transmitted to the terminal, transmitting the indicator to the terminal.

The present disclosure relates to a communication technique that combines a 5G communication system for supporting a higher data transmission rate than a 4G system with IoT technology, and a system therefor. The present disclosure may be applied to intelligent services (e.g. smart homes, smart buildings, smart cities, smart cars or connected cars, healthcare, digital education, retail businesses, security and safety-related services, etc.) on the basis of 5G communication technology and IoT-related technology. A method performed by a session management function (SMF) entity in a communication system, according to one embodiment of the present disclosure, may comprise the steps of: performing a packet data unit (PDU) session establishment procedure; identifying a QoS flow generated for ultra reliable low latency communication (URLLC) in a PDU session; identifying whether an indicator indicating that the PDU session is an Always-on PDU Session has ever been transmitted to a terminal; and when it is identified that the indicator has not been transmitted to the terminal, transmitting the indicator to the terminal.

A method for receiving system information (SI) by a terminal in a wireless communication system supporting carrier aggregation (CA), according to one embodiment of the present specification, comprises: transmitting an RRC connection request message to a base station; receiving an RRC connection setup message from the base station; transmitting an RRC connection setup complete message to the base station; receiving an RRC reconfiguration message related to configuration of a secondary cell (SCell) from a primary cell (pCell) of the base station; and receiving a synchronization signal (SS) from the SCell based on the RRC reconfiguration message.

A processing method of configuration information of bearer, a network device and a terminal are provided in the present disclosure. The method of configuration information of bearer applied to a network device includes the following steps: when a Secondary Cell Group (SCG) or a Primary SCG Cell (PSCell) enters into a suspend state or a dormant state, modifying, by the network device, configuration information of a bearer via a signaling, to enable a configured uplink bearer to transmit on a Master Cell Group (MCG).

A processing method of configuration information of bearer, a network device and a terminal are provided in the present disclosure. The method of configuration information of bearer applied to a network device includes the following steps: when a Secondary Cell Group (SCG) or a Primary SCG Cell (PSCell) enters into a suspend state or a dormant state, modifying, by the network device, configuration information of a bearer via a signaling, to enable a configured uplink bearer to transmit on a Master Cell Group (MCG).

Apparatuses and methods in a communication system are provided. A method comprises receiving from network instructions of how to control multi-user multiple input multiple output connections maintained by one or more radio access nodes, the connections utilising one or more slices. One or more radio access nodes perform, based at least in part on the received network instructions, multi-user pairing of terminal devices of the same or different slices, and determine, based at least in part on the received network instructions, slice-based quota taking multi-user pairing and interference arising from paired allocations into account.