Electronic device, method and storage medium for wireless communication system

A terminal device for a wireless communication system, comprising a processing circuitry configured to:

• determine beam gains of K beam pairs in downlink between a base station and the terminal device, wherein K is a natural number;
• calculate a beam gain gradient for each beam pair;
• transmit identification information related to the K beam pairs, corresponding beam gains and beam gain gradients to the base station;
• and
• receive identification information of a selected downlink beam pair from the base station,
• wherein each beam pair comprises a transmitting beam and a receiving beam, and the beam gain gradient indicates a spatial gain variation of a respective beam pair, and
• wherein the downlink beam pair is a downlink beam pair selected based on a movement state of the terminal device, and wherein the higher a speed of movement of the terminal device is, the higher a priority for a downlink beam pair with a smaller beam gain gradient to be selected is;
• and/or wherein the downlink beam pair is a downlink beam pair selected based on a movement state of the terminal device and a type of service of communication between the base station and the terminal device, so as to compromise between a quality of service of the communication and overhead of beam switching, and wherein a higher quality of service goes with a beam pair with a higher beam gain, and a higher probability of beam switching goes with a beam pair with a higher beam gain gradient.

A terminal, comprising a processing circuitry configured to:

• determine beam gains of K beam pairs in downlink between a base station and the terminal device, wherein K is a natural number;
• calculate a beam gain gradient for each beam pair;
• transmit identification information related to the K beam pairs, corresponding beam gains and beam gain gradients to the base station;
• and
• receive identification information of a selected downlink beam pair from the base station,
• wherein each beam pair comprises a transmitting beam and a receiving beam, and the beam gain gradient indicates a spatial gain variation of a respective beam pair, and
• wherein a beam pair of the K beam pairs with a beam gain gradient less than a predetermined threshold is selected as a downlink beam pair for transmitting control signaling, and the processing circuitry is further configured to:
• receive identification information of the selected downlink beam pair from the base station;
• and
• receive the control signaling by using the selected downlink beam pair.

A terminal, comprising a processing circuitry configured to:

• determine beam gains of K beam pairs in downlink between a base station and the terminal device, wherein K is a natural number;
• calculate a beam gain gradient for each beam pair;
• transmit identification information related to the K beam pairs, corresponding beam gains and beam gain gradients to the base station;
• and
• receive identification information of a selected downlink beam pair from the base station,
• wherein each beam pair comprises a transmitting beam and a receiving beam, and the beam gain gradient indicates a spatial gain variation of a respective beam pair, and
• wherein a beam pair of the K beam pairs with the highest beam gain is selected as an active beam pair, and a beam pair of the K beam pairs with a beam gain gradient less than a predetermined threshold is selected as a candidate beam pair.

A base station for a wireless communication system, comprising a processing circuitry configured to:

• receive identification information related to K downlink beam pairs, corresponding beam gains and beam gain gradients from a terminal device, where K is a natural number;
• select a downlink beam pair for communication from the K beam pairs based on the beam gains and the beam gain gradients;
• and
• transmit the identification information of the selected downlink beam pair to the terminal device,
• wherein each beam pair comprises a transmitting beam and a receiving beam, and the beam gain gradient indicates a spatial gain variation of a respective beam pair, and
• wherein the processing circuitry is further configured to select the downlink beam pair based on a movement state of the terminal device, and wherein the higher a speed of movement of the terminal device is, the higher a priority for a downlink beam pair with a smaller beam gain gradient to be selected is;
• and/or wherein the processing circuitry is further configured to select the downlink beam pair based on a movement state of the terminal device and a type of service of communication between the base station and the terminal device, so as to compromise between a quality of service of the communication and overhead of beam switching, and wherein a higher quality of service goes with a beam pair with a higher beam gain, and a higher probability of beam switching goes with a beam pair with a higher beam gain gradient.

A base station for a wireless communication system, comprising a processing circuitry configured to:

• receive identification information related to K downlink beam pairs, corresponding beam gains and beam gain gradients from a terminal device, where K is a natural number;
• select a downlink beam pair for communication from the K beam pairs based on the beam gains and the beam gain gradients;
• and
• transmit the identification information of the selected downlink beam pair to the terminal device,
• wherein each beam pair comprises a transmitting beam and a receiving beam, and the beam gain gradient indicates a spatial gain variation of a respective beam pair, and
• wherein the processing circuitry is further configured to:
• select a beam pair from the K beam pairs with a beam gain gradient less than a predetermined threshold as a downlink beam pair for fling control signaling,
• transmit identification information of the selected downlink beam pair to the terminal device, and
• transmit the control signaling by using the downlink beam pair.

A base station for a wireless communication system, comprising a processing circuitry configured to:

• receive identification information related to K downlink beam pairs corresponding beam gains and beam gain gradients from a terminal device, where K is a natural number;
• select a downlink beam pair for communication from the K beam pairs based on the beam gains and the beam gain gradients;
• and
• transmit the identification information of the selected downlink beam pair to the terminal device,
• wherein each beam pair comprises a transmitting beam and a receiving beam, and the beam gain gradient indicates a spatial gain variation of a respective beam pair, and
• wherein the processing circuitry is further configured to:
• select a beam pair of the K beam pairs with the highest beam gain as an active beam pair,
• select a beam pair of the K beam pairs with a beam gain gradient less than a predetermined condition as a candidate beam pair, and
• transmit identification information related to the active beam pair and the candidate beam pair to the terminal device.