A establishing method of a reconfigurable intelligent surface radio frequency model includes calculating a first power ratio between a first receiving antenna and a first transmitting antenna according to a first wireless transmission equation; calculating a second power ratio between a second receiving antenna and a second transmitting antenna according to a second wireless transmission equation, wherein a reconfigurable intelligent surface is disposed between the second transmitting antenna and the second receiving antenna, and separated from the second transmitting antenna by a reference distance; calculating the first power ratio, the second power ratio and a path loss corresponding to the reference distance to obtain a relay gain of the reconfigurable intelligent surface; and establishing the reconfigurable intelligent surface radio frequency model based on a loss correction value and the relay gain.

A method of scheduling data transmission in a radio access network is provided. The radio access network comprises a scheduler configured to orchestrate communication of data between one or more base stations and a plurality of User Equipments, UEs, according to a set of instructions. The method comprises receiving real-time network usage data. The method further comprises dynamically modifying the set of instructions based on the network usage data. The method further comprises implementing the modified set of instructions so that the scheduler is configured to orchestrate communication of data between the one or more base stations and the plurality of UEs according to the modified set of instructions.

The technology described herein is directed towards a reconfigurable intelligent surface (RIS) that harvests RF energy from incoming signals based on energy harvesting antennas and associated energy harvesting circuitry. At the same time RIS elements (unit cells) redirect the incoming signals towards a predetermined direction. The harvested energy is combined and converted to DC power using a harvesting circuit. In one implementation, a dual-mode energy harvesting circuit employs a higher power rectifier subcircuit and a lower power rectifier subcircuit, with a multiport circulator and switch that self-actuates to use one or the other rectifier subcircuit based on the combined RF input power captured by the energy harvesting antennas. A multiple battery approach is described, in which one battery is charging based on the converted DC power, another, previously-charged battery is powering the reconfigurable intelligent surface components.

An example method of positioning of a target UE in a presence of one or more RIDs, the method performed by a server and may comprise receiving, from the target UE, information of the one or more distributed RIDs indicating at least one or more positions of the one or more distributed RIDs, wherein the one or more distributed RIDs are used for link enhancement of a wireless link between the target UE and one or more radio access network (RAN) nodes configured for positioning the target UE, and wherein the one or more distributed RIDs are not directly controlled by the server. The method may also comprise positioning the target UE based at least in part on the information of the one or more distributed RIDs.

A working mode indicating method and apparatus and a device are provided. The method includes: receiving first information sent by a network side device, where the first information indicates an RIS working mode or a relay working mode.

Aspects provided herein provide methods and systems for utilizing an adaptable Van Atta reflective array (A-VARA) system. The system comprises an A-VARA panel comprising variable phase shifters incorporated into transmission lines linking a set of radiating elements. The system also comprises a control that modifies a reflection direction of the A-VARA panel and provides aggregate adjustment to each of the variable phase shifters to steer reflected coverage around an obstacle.

The technology described herein is directed towards a transcoder that can be deployed on a drone and used to couple non-terrestrial network satellites to user equipment. A metasurface (reconfigurable intelligent surface, or RIS, e.g., also mounted on the drone or integrated with the transcoder) redirects signals from the satellite to a satellite radio frequency (RF) interface of the transcoder, with the transcoder also coupled by a user equipment (UE) RF interface to user equipment. The drone-mounted transcoder converts satellite-originating signals to UE-compliant signals, and converts UE-originating signal to satellite-compliant signals. The transcoder performs various conversion-related functions to facilitate such satellite direct-to-device service, including via packet conversion, frequency conversion, doppler manipulation, a repeater, frequency equalization/negative-slope compensation and RIS-related conversion in both the receive mode and transmit mode of the RIS. Various example form factors for implementing and deploying the transcoder and metasurface can be used.

The subject technology provides for opportunistic shared access to a reconfigurable intelligent surface. An apparatus may determine whether opportunistic shared access to a reconfigurable intelligent surface (RIS) device is available. The apparatus also may provide control information for transmission to a controller associated with the RIS device based on a determination that opportunistic shared access to the RIS device is available. By providing electronic devices with opportunistic and fair access to a reconfigurable intelligent surface, the performance and reliability of reconfigurable intelligent surface systems is increased.

A reconfigurable intelligent surface (RIS) may transmit a capability report associated with the RIS. The capability report may be associated with reflection and sensing capabilities of the RIS. A network node may obtain the capability report associated with the RIS. The network node may transmit a first configuration of resources associated with at least one RS and a second configuration of at least one mode associated with the reflection and sensing capabilities of the RIS. The at least one mode may be associated with the at least one RS. The at least one mode may include a hybrid sensing and reflection mode. The RIS may receive the first configuration of resources associated with the at least one RS and the second configuration of the at least one mode associated with the reflection and sensing capabilities of the RIS.

The disclosed system uses a less complex system of a single radio receiver-frontend with a phase-reconfigurable reflectarray and an antenna to form beams in directions of the desired arriving signals while forming nulls in directions of the arriving radio interference signals. This is done by configuring each reflector with an appropriate phase-shift state so that the amplification of the desired radio signals and the nulling of the undesired radio signals happen at the point all reflected radio signals combine at the antenna (before the receiver frontend). In comparison, a conventional digital receive array achieves beams and nulls by taking the sampled radio signal streams at the outputs of the receiver frontends, multiplies each sample stream by a digital weight to shift the stream's phase and/or amplitude and then combines the sample streams into one sample stream in which desired radio signals are amplified and undesired radio signals are attenuated.