Abstract:
The present invention provides a method for selecting a cell by a terminal which is capable of establishing a radio connection through a plurality of radio interfaces. The terminal comprises a signal transmitting/receiving unit and a processor connected to the signal transmitting/receiving unit. The processor may receive, from a base station, system information about pilot transmission power and an uplink reception power limit, estimate the amount of path loss on the basis of the pilot transmission power and measured pilot reception power, and determine whether to connect to the base station on the basis of the uplink reception power limit and the amount of path loss.
Abstract:
A method for performing a connecting operation with multiple communication systems by a terminal in a network including the multiple communication systems interworking with each other according to the present invention comprises the steps of: transmitting, to an interworking entity of a first communication system, a result of scanning a base station of a second communication system in a state where the terminal is radio resource control (RRC)-connected with the first communication system and is in an idle with the second communication system; receiving a first message from the interworking entity of the first communication system, the first message including a first indicator instructing the terminal to perform an association process with the base station of the second communication system and a second indicator instructing the terminal to operate in a power saving mode with the second communication system; performing the association process with the base station of the second communication system on the basis of the first indicator of the first message; switching into an RRC idle mode state with the first communication system and entering the power saving mode from the idle mode with the second communication system on the basis of the second indicator of the first message, after performing the association process; and receiving, from a base station of the first communication system, a paging message for the second communication system through a paging channel of the first communication system.
Abstract:
The apparatus for reconstructing a desired signal using a full duplex radio (FDR) scheme includes: a digital self-interference cancellation unit configured to output a first digital signal; a demodulator configured to demodulate the first digital signal; a modulator configured to modulate the demodulated first digital signal; an attenuator configured to attenuate the modulated first digital signal by applying an attenuation coefficient to the modulated first digital signal; and an operation unit configured to receive the attenuated first digital signal and the first digital signal, and transmit a residual signal to the digital self-interference cancellation unit, wherein the residual signal is obtained by subtracting the attenuated first digital signal from the first digital signal.
Abstract:
A method for and apparatus for performing data transmission in a wireless communication system is provided. A wireless device acquires information including a threshold on an action, which is configured for a secondary radio access technologies (RAT) system, checks a condition to be triggered by the threshold and a measurement result of the secondary RAT system, performs a corresponding action according to the condition. The secondary RAT system is used for a User-Plane (U-plane) data, the threshold is changeable by at least one of a network preference including a primary RAT system or the secondary RAT system, a quality of service (QoS) information, and bearer information, the action includes whether an association/disassociation/data transition direction for the secondary RAT system is configured.
Abstract:
A method and apparatus for performing transmit (Tx) power control in a convergence network of a plurality of communication systems. A method for performing transmit power control (TPC) in a plurality of communication system convergence networks includes receiving, by a first entity of a first communication system, a TPC information request message requesting information associated with transmit power control (TPC) from a second entity of a second communication system; upon receiving a request of the TPC information request message, transmitting a first TPC information reporting message, which includes a maximum transmit (Tx) power value of the first entity and an interference signal value caused by a neighbor entity of the first entity, to the second entity; receiving a TPC command message, which includes information of the maximum Tx power value of the first entity adjusted based on the maximum Tx power value of the first entity and the interference signal value, from the second entity; and adjusting the maximum Tx power value of the first entity based on the information regarding the adjusted maximum Tx power of the first entity.
Abstract:
A method and apparatus for supporting or performing status mode transition in a convergence network of a plurality of communication systems are disclosed. A method for supporting status mode transition by an entity of a first communication system in a plurality of communication system convergence networks includes: if a triggering condition for triggering transition between an active mode and an idle mode is satisfied, transmitting a first message indicating status mode transition to an entity of a second communication system; receiving a second message including specific information indicating whether the status mode transition is successful from the entity of the second communication system, in response to the first message; and updating status information of the entity of the second communication system on the basis of the second message, wherein the first and second communication systems are heterogeneous communication systems for each other.
Abstract:
A method and apparatus for transmitting a paging message in a cloud radio access network (RAN) system is provided. A baseband unit (BBU) or a mobility management entity (MME) determines a location update range of a user equipment (UE) based on moving speed and a moving direction of the UE, and transmits information this to the UE. The UE transmits information on moving information of the UE, which is determined based on the received information and a measurement result with respect to at least one accessible remote radio frequency (RF) unit (RRU) of the UE, and the measurement result to the BBU or the MME; and The BBU or MME updates the location update range of the UE based on the received measurement result and the moving information of the UE, and transmits a paging message to the UE through at least one RRU included in the updated location update range of the UE.
Abstract:
In the present disclosure, a method for operating a terminal in a wireless communication may include receiving, by the terminal, a synchronization signal from a base station, transmitting a random access preamble to the base station based on the synchronization signal, receiving a random access response based on the random access preamble, performing connection with the base station after receiving the random access response, receiving at least any one of AI/ML model information and model performance feedback-related information for an AI/ML model from the base station, and performing model inference in the AI/ML model based on the AI/ML model information and determining, through model performance evaluation, whether or not to transmit MPF of the AI/ML model to the base station.
Abstract:
The present invention relates to a method of performing a random access to a base station by a user equipment (UE) in a wireless communication system. In particular, the method includes transmitting a random access preamble and a payload including a common control channel (CCCH) service data unit (SDU) to the network; and receiving a medium access control (MAC) protocol data unit (PDU) in response to the random access preamble and the payload, wherein the MAC PDU includes a contention resolution identifier (CRID) and an indicator indicating a presence of a signaling radio bearer (SRB) radio resource control (RRC) message corresponding to the CRID in the MAC PDU.
Abstract:
In the present disclosure, a user equipment (UE) receives a uplink (UL) grant for a wide band, the wide band i) being wider than a predetermined value, ii) operating on an unlicensed band and iii) including multiple subbands; measures channel occupancy for the wide band; determines whether to generate a medium access control (MAC) protocol data unit (PDU) in units of the whole wide band or in units of subband, based on the measured channel occupancy; generates the MAC PDU in units of the whole wide band or in units of subband; performs clear channel assessment (CCA) per subband; and transmits the generated MAC PDU via at least one subband where the CCA is successful.