Communication system and communication method using reconfigurable intelligent surface and reconfigurable intelligent surface device
An aspect of the disclosure includes a communication system and a communication method using reconfigurable intelligent surface and a reconfigurable intelligent surface device. The communication system includes at least one base station, a reconfigurable intelligent surface device, and a control at one least device. The at least one base station respectively transmits at least one beam. The reconfigurable intelligent surface device is coupled to the at least one base station, and measures the at least one beam of the at least one base station to obtain signal measurement results associated with each of the at least one base station. The control device is coupled to the at least one base station. The control device groups the at least one base station and the reconfigurable intelligent surface device into at least one group according to the signal measurement results associated with each of the at least one base station.
1. A communication system using a reconfigurable intelligent surface (RIS), comprising:
at least one base station, respectively transmitting at least one beam;
an RIS device, coupled to the at least one base station and measuring the at least one beam of the at least one base station to obtain signal measurement results associated with each of the at least one base station; and
a control device, coupled to the at least one base station and grouping the at least one base station and the RIS device into at least one group according to the signal measurement results associated with each of the at least one base station,
wherein the at least one group comprises a first group, and the control device controls the first group to operate in a cooperation mode or a non-cooperation mode according to a number of base stations in the first group.
2. The communication system using the reconfigurable intelligent surface according to claim 1 , wherein when the number of base stations in the first group is greater than 1, the control device controls the first group to operate in the cooperation mode; and when the number of base stations in the first group is equal to 1, the control device controls the first group to operate in the non-cooperation mode.
3. The communication system using the reconfigurable intelligent surface according to claim 1 , wherein when the first group operates in the cooperation mode, the control device controls a first base station and a second base station in the first group to jointly transmit downlink data to user equipment.
4. The communication system using the reconfigurable intelligent surface according to claim 3 , wherein the RIS device comprises a plurality of first reflection units and a plurality of second reflection units, the first reflection units are used to reflect a beam of the first base station, and the second reflection units are used to reflect a beam of the second base station.
5. The communication system using the reconfigurable intelligent surface according to claim 1 , wherein the signal measurement results comprise received signal strength indicator (RSSI), reference signal received power (RSRP), reference signal received quality (RSRQ), or other signal strength indicators.
6. The communication system using the reconfigurable intelligent surface according to claim 1 , wherein the at least one base station comprises a first base station, the RIS device measures the at least one beam of the first base station to obtain signal measurement parameters of each of the at least one beam of the first base station, and the RIS device determines signal measurement result associated with the first base station according to the signal measurement parameters of each of the at least one beam of the first base station.
7. The communication system using the reconfigurable intelligent surface according to claim 1 , wherein the at least one base station comprises a first base station, and in response to signal measurement result of the first base station being greater than a threshold value, the control device groups the RIS device and the first base station into one of the at least one group.
8. The communication system using the reconfigurable intelligent surface according to claim 7 , wherein the at least one base station comprises a second base station, and in response to the signal measurement result of the first base station being greater than the threshold value and signal measurement result of the second base station being greater than the threshold value, the control device groups the RIS device, the first base station, and the second base station into one of the at least one group.
9. A communication method using a reconfigurable intelligent surface, comprising:
measuring at least one beam of at least one base station to obtain signal measurement results associated with each of the at least one base station;
grouping the at least one base station and an RIS device into at least one group according to the signal measurement results associated with each of the at least one base station, wherein the at least one group comprises a first group; and
controlling the first group to operate in a cooperation mode or a non-cooperation mode according to a number of base stations in the first group.
10. The communication method using the reconfigurable intelligent surface according to claim 9 , wherein measuring the at least one beam of the at least one base station to obtain the signal measurement results associated with each of the at least one base station comprises:
measuring the at least one beam of the at least one base station to obtain the signal measurement results associated with each of the at least one base station via the RIS device.
11. The communication method using the reconfigurable intelligent surface according to claim 9 , wherein measuring the at least one beam of the at least one base station to obtain the signal measurement results associated with each of the at least one base station comprises:
measuring the at least one beam of the at least one base station to obtain the signal measurement results associated with each of the at least one base station via a user equipment.
12. The communication method using the reconfigurable intelligent surface according to claim 9 , wherein the method further comprises:
controlling the first group to operate in the cooperation mode when the number of base stations in the first group is greater than 1; and
controlling the first group to operate in the non-cooperation mode when the number of base stations in the first group is equal to 1.
13. The communication method using the reconfigurable intelligent surface according to claim 12 , wherein controlling the first group to operate in the cooperation mode when the number of base stations in the first group is greater than 1 comprises:
controlling a first base station and a second base station in the first group to jointly transmit downlink data to user equipment when the first group operates in the cooperation mode.
14. The communication method using the reconfigurable intelligent surface according to claim 13 , wherein controlling the first base station and the second base station in the first group to jointly transmit the downlink data to the user equipment comprises:
reflecting a beam of the first base station through a plurality of first reflection units of the RIS device; and
reflecting a beam of the second base station through a plurality of second reflection units of the RIS device.
15. The communication method using the reconfigurable intelligent surface according to claim 9 , wherein the signal measurement results comprise received signal strength indicator, reference signal received power, reference signal received quality, or other signal strength indicators.
16. The communication method using the reconfigurable intelligent surface according to claim 9 , wherein the at least one base station comprises a first base station, and measuring the at least one beam of the at least one base station to obtain the signal measurement results associated with each of the at least one base station comprises:
measuring the at least one beam of the first base station to obtain signal measurement parameters of each of the at least one beam of the first base station; and
determining signal measurement result associated with the first base station according to the signal measurement parameters of each of the at least one beam of the first base station.
17. The communication method using the reconfigurable intelligent surface according to claim 9 , wherein the at least one base station comprises a first base station, and grouping the at least one base station and the RIS device into the at least one group according to the signal measurement results associated with each of the at least one base station comprises:
in response to signal measurement result of the first base station being greater than a threshold value, grouping the RIS device and the first base station into one of the at least one group.
18. The communication method using the reconfigurable intelligent surface according to claim 17 , wherein the at least one base station comprises a second base station, and grouping the at least one base station and the RIS device into the at least one group according to the signal measurement results associated with each of the at least one base station comprises:
in response to the signal measurement result of the first base station being greater than the threshold value and signal measurement result of the second base station being greater than the threshold value, grouping the RIS device, the first base station, and the second base station into one of the at least one group.
19. A reconfigurable intelligent surface device, comprising:
a transceiver;
a memory; and
a processor, coupled to the transceiver and the memory, configured to:
measure at least one beam of at least one base station obtain signal measurement results associated with each of the at least one base station; and
transmit the signal measurement results associated with each of the at least one base station to a control device through the transceiver, wherein the signal measurement results of each of the at least one base station are used to determine a group to which the reconfigurable intelligent surface device belongs, and the group is configured to operate in a cooperation mode or a non-cooperation mode according to a number of base stations in the group.