TECHNICAL FIELD

The present disclosure relates to the field of communications technologies, in particular to a channel transmission method, a terminal and a network device.

BACKGROUND

In mobile communication systems, for a physical downlink control channel (Physical Downlink Control Channel, PDCCH), a terminal may receive a PDCCH common search space and various parameters configured by a network device, wherein a transmission control indicator (Transmission Control Indicator, TCI) state parameter includes a plurality of TCI states for the PDCCH. Before the network device activates one of the TCI states through a medium access control (Medium Access Control, MAC) control element (Control Element, CE), the terminal assumes that a de-modulation reference signal (De-Modulation Reference Signal, DMRS) port of the PDCCH is quasi co-located (Quasi Co-Located, QCL) with a synchronization signal and physical broadcast channel (Physical Broadcast Channel, PBCH) block (Synchronization Signal and PBCH Block, SSB) configured in an initial access procedure. Correspondingly, for a physical downlink shared channel (Physical Downlink Shared Channel, PDSCH), before the terminal receives a TCI configured by a higher layer and activation information, the terminal assumes that a DMRS port of the PDSCH is QCL with an SSB configured in an initial access procedure. Since the TCI of the SSB configured in the initial access procedure is pre-configured and remains fixed, before a certain TCI state is activated for the PDCCH or PDSCH, the terminal considers that the DMRS port of the PDCCH or PDSCH is QCL with the SSB. Consequently, the terminal cannot operate flexibly according to network performance, leading to deterioration of system performance.

SUMMARY

Embodiments of the present disclosure provide a channel transmission method, a terminal and a network device, to solve the problem that the DMRS port of the PDCCH or PDSCH is QCL with the SSB, thus the terminal cannot operate flexibly according to network performance, leading to deterioration of system performance.

In a first aspect, an embodiment of the present disclosure provides a channel transmission method. The method is operable by a terminal side and includes: acquiring target transmission configuration indicator (TCI) state information of a control resource set with an identity value of 0 (CORESET0); receiving a physical downlink channel according to the target TCI state information when a preset condition is met; wherein the physical downlink channel includes at least one of: a physical downlink control channel (PDCCH) and a physical downlink shared channel (PDSCH).

In a second aspect, an embodiment of the present disclosure further provides a terminal. The terminal includes: a first acquisition module, used to acquire target transmission configuration indicator (TCI) state information of a control resource set with an identity value of 0 (CORESET0); a first reception module, used to receive a physical downlink channel according to the target TCI state information when a preset condition is met; wherein the physical downlink channel includes at least one of: a physical downlink control channel (PDCCH) and a physical downlink shared channel (PDSCH).

In a third aspect, an embodiment of the present disclosure provides a terminal including a processor, a memory and a computer program stored in the memory and used to be executed by the processor, wherein the processor is used to execute the computer program to implement steps of the foregoing channel transmission method.

In a fourth aspect, an embodiment of the present disclosure provides a channel transmission method. The method is operable by a network device side and includes: configuring target transmission configuration indicator (TCI) state information for a control resource set with an identity value of 0 (CORESET0); transmitting a physical downlink channel according to the target TCI state information when a preset condition is met; wherein the physical downlink channel includes at least one of: a physical downlink control channel (PDCCH) and a physical downlink shared channel (PDSCH).

In a fifth aspect, an embodiment of the present disclosure provides a network device. The network device includes: a configuration module, used to configure target transmission configuration indicator (TCI) state information for a control resource set with an identity value of 0 (CORESET0); a first transmission module, used to transmit a physical downlink channel according to the target TCI state information when a preset condition is met; wherein the physical downlink channel includes at least one of: a physical downlink control channel (PDCCH) and a physical downlink shared channel (PDSCH).

In a sixth aspect, an embodiment of the present disclosure further provides a network device including a processor, a memory and a computer program stored in the memory and used to be executed by the processor, wherein the processor is used to execute the computer program to implement steps of the foregoing channel transmission method.

In a seventh aspect, an embodiment of the present disclosure provides a computer readable storage medium storing therein a computer program, wherein the computer program is used to be executed by a processor to implement steps of the foregoing channel transmission method.

Thus, a network device and a terminal according to embodiments of the present disclosure may perform physical downlink channel transmission according to TCI state information of the CORESET0 when a preset condition is met. As a result, the flexibility of physical downlink channel transmission may be improved, thereby improving system performance.

