Abstract: The present disclosure relates to method performed by a mission critical push-to-talk (MCPTT) server, the method comprises: receiving, from a first user equipment (UE), a request for a connection to communicate with one or more second UEs, wherein the request includes at least a first priority score associated with a type of the connection; determining, based on the request, a second priority score corresponding to the first UE, wherein the second priority score is associated with a type information; and performing based on the first priority score and the second priority score one of: approving the request for the connection, or rejecting the request for the connection.

Abstract: A method for communication by a source general packet radio service tunnelling protocol user (GTP-U) node in a wireless network is provided. The method includes receiving at least one data packet from at least one user equipment (UE), determining whether the at least one received data packet is at least one guaranteed bit rate (GBR) data packet or at least one non-GBR data packet, if the at least one received data packet is the at least one GBR data packet, transmitting the at least one received GBR data packet to at least one target GTP-U node, if the at least one received data packet is the at least one non-GBR data packet, storing the at least one received non-GBR data packet into a buffer before transmitting to the at least one target GTP-U node, and transmitting the at least one received non-GBR data packet to the at least one target GTP-U node based on a maximum segment size (MSS) of the buffer.

Abstract: The present disclosure relates to method performed by a mission critical push-to-talk (MCPTT) server, the method comprises: receiving, from a first user equipment (UE), a request for a connection to communicate with one or more second UEs, wherein the request includes at least a first priority score associated with a type of the connection; determining, based on the request, a second priority score corresponding to the first UE, wherein the second priority score is associated with a type information; and performing based on the first priority score and the second priority score one of: approving the request for the connection, or rejecting the request for the connection.