Methods and systems for configuring a reconfigurable intelligent surface
Systems and methods are described for configuring a reconfigurable intelligent surface, RIS, to direct signals during a time period in at least one direction based on a spatio-temporal model. The spatio-temporal model of users of a wireless network within a region is received.
1 . A method comprising:
receiving, using control circuitry, a spatio-temporal model of users of a wireless network within a region; and
configuring, using control circuitry, a reconfigurable intelligent surface, RIS, to direct signals during a time period in at least one direction based on the spatio-temporal model, wherein the spatio-temporal model is produced based on data relating to historical user trajectories in the region; and an influence factor which influences user trajectory in the region.
2 . The method of claim 1 , wherein the spatio-temporal model indicates a predicted location of at least one user within the region at time intervals of the time period, and wherein, during a time interval, the RIS is configured to direct signals in at least one direction based on the predicted location of the at least one user at that time interval.
3 . The method of claim 1 , wherein the spatio-temporal model indicates least one sub-region of the region to which signals are to be directed, wherein a sub-region corresponds to a predicted cluster of users within the region.
4 . The method of claim 1 , wherein the RIS is configured to direct signals to a center of at least one sub-region of the region based on the spatio-temporal model.
5 . The method of claim 1 , further comprising:
tracking movement of a plurality of users within the region over a plurality of time intervals; and
determining a pattern of user position based on the tracked movement of the plurality of users within the region,
wherein the spatio-temporal model is based on the determined pattern of user position.
6 . The method of claim 1 , wherein the method further comprises receiving a current location of at least one user, and predicting, based on the current location and the spatio-temporal model, a future location of the at least one user at a time interval of the time period, and wherein the RIS is configured to direct the signals based on the predicted future location of the at least one user at the time interval.
7 . The method of claim 1 , wherein the method further comprises determining a proportion of the RIS to be configured to direct signals to a sub-region of the region, and wherein a proportion of the RIS which is closest to a center of a sub-region is used to direct signals to that sub-region.
8 . The method of claim 1 , wherein the method further comprises configuring a plurality of reconfigurable intelligent surfaces, RISs, to direct signals in directions based on the spatio-temporal model.
9 . The method of claim 1 , wherein the region is divided into sub-regions, and wherein a RIS which is closest to a center of a sub-region of the region is used to direct signals to that sub-region.
10 . The method of claim 1 , wherein the method further comprises providing feedback to a user device indicating a location of a sub-region of the region to which the RIS is directing signals, or will be directing signals in a subsequent time interval of the time period, relative to a current position of the user device.
11 . A system comprising control circuitry configured to:
receive a spatio-temporal model of users of a wireless network within a region; and
configure a reconfigurable intelligent surface, RIS, to direct signals during a time period in at least one direction based on the spatio-temporal model, wherein the spatio-temporal model is produced based on data relating to historical user trajectories in the region; and an influence factor which influences user trajectory in the region.
12 . The system of claim 11 , wherein the spatio-temporal model indicates a predicted location of at least one user within the region at time intervals of the time period, and wherein, during a time interval, the RIS is configured to direct signals in at least one direction based on the predicted location of the at least one user at that time interval.
13 . The system of claim 11 , wherein the spatio-temporal model indicates least one sub-region of the region to which signals are to be directed, wherein a sub-region corresponds to a predicted cluster of users within the region.
14 . The system of claim 11 , wherein the RIS is configured to direct signals to a center of at least one sub-region of the region based on the spatio-temporal model.
15 . The system of claim 11 , wherein the control circuitry is further configured to receive a current location of at least one user, and predict, based on the current location and the spatio-temporal model, a future location of the at least one user at a time interval of the time period, and wherein the RIS is configured to direct the signals based on the predicted future location of the at least one user at the time interval.
16 . The system of claim 11 , wherein the control circuitry is further configured to determine a proportion of the RIS to be configured to direct signals to a sub-region of the region, and wherein a proportion of the RIS which is closest to a center of a sub-region is used to direct signals to that sub-region.
17 . The system of claim 11 , wherein the region is divided into sub-regions, and wherein a RIS which is closest to a center of a sub-region of the region is used to direct signals to that sub-region.
18 . The system of claim 11 , wherein the control circuitry is further configured to provide feedback to a user device indicating a location of a sub-region of the region to which the RIS is directing signals, or will be directing signals in a subsequent time interval of the time period, relative to a current position of the user device.