The present disclosure relates to a communication technique for converging IoT technology with a 5G communication system for supporting a higher data transfer rate beyond a 4G system, and a system therefor. The present disclosure can be applied to intelligent services (e.g., smart homes, smart buildings, smart cities, smart or connected cars, health care, digital education, retail business, and services associated with security and safety) on the basis of 5G communication technology and IoT-related technology. Disclosed are a method and an apparatus for configuring an efficient hierarchical layer 2 architecture and main functions thereof in a next-generation mobile communication system.

Aspects of the present disclosure relate to a technique for determining quasi co-location (QCL) and/or transmission configuration information (TCI) state assumption information for a dynamic control resource set (CORESET). A user equipment (UE) may receive and/or detect a downlink control information (DCI) that schedules at least one dynamic CORESET and indicates a TCI state from a list of one or more TCI states for the dynamic CORESET. The UE may apply the indicated TCI state for processing physical downlink control channel (PDCCH) transmissions in the dynamic CORESET when one or more conditions are met.

Aspects of the present disclosure relate to a technique for determining quasi co-location (QCL) and/or transmission configuration information (TCI) state assumption information for a dynamic control resource set (CORESET). A user equipment (UE) may receive and/or detect a downlink control information (DCI) that schedules at least one dynamic CORESET and indicates a TCI state from a list of one or more TCI states for the dynamic CORESET. The UE may apply the indicated TCI state for processing physical downlink control channel (PDCCH) transmissions in the dynamic CORESET when one or more conditions are met.

A transmitting apparatus generates at least one of a first type of schedule element supporting an allocation involving a single channel and a second type of schedule element supporting an allocation involving a plurality of channels and transmits a MAC frame including the generated at least one schedule element over a first channel. When the allocation involving the plurality of channels includes the first channel, the transmitting apparatus generates a first type of schedule element including information regarding the allocation involving the plurality of channels and generates the second type of schedule element including difference information, and when the allocation involving the plurality of channels does not include the first channel, the transmitting apparatus omits the generation of the first type of schedule element and generates the second type of schedule element including all the information regarding the allocation involving the plurality of channels.

This application discloses a session management method, a network device, and a communications system. According to embodiments of the present invention, an intermediate session management entity is selected based on UE location information and PDU session requirement information. In this way, an intermediate session management entity near UE can provide a service for a PDU session, and a delay of data transmission is reduced. In addition, the intermediate session management entity selects a user plane entity based on the UE location information and the PDU requirement information, and the intermediate session management entity is responsible for managing user plane entities within a specified area, and does not need to manage user plane entities in the entire PDU session, thereby reducing management complexity.

This application discloses a session management method, a network device, and a communications system. According to embodiments of the present invention, an intermediate session management entity is selected based on UE location information and PDU session requirement information. In this way, an intermediate session management entity near UE can provide a service for a PDU session, and a delay of data transmission is reduced. In addition, the intermediate session management entity selects a user plane entity based on the UE location information and the PDU requirement information, and the intermediate session management entity is responsible for managing user plane entities within a specified area, and does not need to manage user plane entities in the entire PDU session, thereby reducing management complexity.

The present disclosure provides a method for transmitting an uplink signal, a terminal device and a network device. The method includes the following steps. The terminal device receives resource configuration information carried by a RRC message. The resource configuration information is used to indicate a plurality of resources configured for zero-power DMRS. The terminal device receives activation information carried by DCI. The activation information is used to indicate: 1) whether to enable the zero-power DMRS; and 2) selecting a resource occupied by the enabled zero-power DMRS in the plurality of resources. The terminal device determines he resource occupied by the zero-power DMRS based on the resource configuration information and the activation information. The resource occupied by the zero-power DMRS is not used for sending uplink data, and the resource occupied by the zero-power DMRS is not used for sending non-zero-power DMRS.

The present disclosure provides a method for transmitting an uplink signal, a terminal device and a network device. The method includes the following steps. The terminal device receives resource configuration information carried by a RRC message. The resource configuration information is used to indicate a plurality of resources configured for zero-power DMRS. The terminal device receives activation information carried by DCI. The activation information is used to indicate: 1) whether to enable the zero-power DMRS; and 2) selecting a resource occupied by the enabled zero-power DMRS in the plurality of resources. The terminal device determines he resource occupied by the zero-power DMRS based on the resource configuration information and the activation information. The resource occupied by the zero-power DMRS is not used for sending uplink data, and the resource occupied by the zero-power DMRS is not used for sending non-zero-power DMRS.

Embodiments of this application provide a data transmission method and a corresponding apparatus. The method includes obtaining, by a second terminal, first information, wherein the first information indicates a correspondence between a downlink quality of service (QoS) flow and a downlink device-to-device (D2D) bearer; and sending, by the second terminal to a first terminal based on the correspondence, a downlink data packet on the downlink D2D bearer corresponding to the downlink QoS flow, wherein the downlink data packet is carried on the downlink QoS flow.

Embodiments of this application provide a data transmission method and a corresponding apparatus. The method includes obtaining, by a second terminal, first information, wherein the first information indicates a correspondence between a downlink quality of service (QoS) flow and a downlink device-to-device (D2D) bearer; and sending, by the second terminal to a first terminal based on the correspondence, a downlink data packet on the downlink D2D bearer corresponding to the downlink QoS flow, wherein the downlink data packet is carried on the downlink QoS flow.