Network communications between reconfigurable intelligent surfaces
Methods, systems, and devices for wireless communications are described. Generally, a reconfigurable intelligent surface (RIS) may transmit a capability information message including an indicating that the RIS is capable of participating in network communications and communicating with other RISs on the network. A first RIS may communicate beam information to a second RIS directly, or the first RIS may communicate beam information to the second RIS via a base station, or the first RIS may communicate beam information to the second RIS via a user equipment (UE). In some examples, one RIS may request beam information or reflecting assistance from another RIS.
1 . A method for wireless communications at a first reconfigurable intelligent surface, comprising:
configuring, by a controller of the first reconfigurable intelligent surface, one or more reconfigurable intelligent surface elements for reflecting signaling between at least one of a base station and first user equipment (UE) via a first communication link, or the first UE and a second UE via a second communication link;
transmitting a capability information message on at least one of the first communication link or the second communication link, the capability information message comprising an indication that the first reconfigurable intelligent surface is capable of communicating with a second reconfigurable intelligent surface via at least one of the first communication link or the second communication link; and
transmitting a beam information message to the second reconfigurable intelligent surface based at least in part on the capability information message via at least one of the first communication link or the second communication link, the beam information message comprising at least one of one or more phase values, one or more amplitude values, or one or more codebook weight values associated with the one or more reconfigurable intelligent surface elements.
2 . The method of claim 1 , further comprising:
including, in the beam information message, at least one of an identifier for the first reconfigurable intelligent surface, or an identifier for the second reconfigurable intelligent surface.
3 . The method of claim 2 , further comprising:
including, in the beam information message, at least one of an identifier for the base station, an identifier for the first UE, an identifier for the second UE, an indication of a pairing of the base station and the UE, or an indication of a pairing between the first UE and the second UE.
4 . The method of claim 1 , further comprising:
including, in the capability information message, an indication that the first reconfigurable intelligent surface is capable of transmitting and receiving at least one of data messages, control messages, or feedback messages via at least one of the first communication link or the second communication link.
5 . The method of claim 1 , further comprising:
including, in the capability information message, an indication that the first reconfigurable intelligent surface is capable of autonomously identifying resources on the second communication link.
6 . The method of claim 1 , further comprising:
including, in the capability information message, a request for assistance in identifying resources on the second communication link.
7 . The method of claim 1 , further comprising:
receiving, from the base station, an allocation of resources on the first communication link, wherein the beam information message is transmitted directly to the second reconfigurable intelligent surface via the allocated resources on the first communication link.
8 . The method of claim 1 , further comprising:
receiving, from the first UE, an allocation of resources on the second communication link, wherein the beam information message is transmitted directly to the second reconfigurable intelligent surface via the allocated resources on the second communication link.
9 . The method of claim 1 , further comprising:
sensing, by the first reconfigurable intelligent surface, one or more resources on the second communication link, wherein the beam information message is transmitted directly to the second reconfigurable intelligent surface via the sensed one or more resources on the second communication link.
10 . The method of claim 1 , wherein transmitting the beam information message comprises:
transmitting the beam information message to the second reconfigurable intelligent surface via the base station on the first communication link.
11 . The method of claim 1 , wherein transmitting the beam information message comprises:
determining resources on the second communication link for transmitting the beam information message to the first UE or the second UE; and
transmitting the beam information message to the second reconfigurable intelligent surface via the first UE or the second UE on the determined resources on the second communication link.
12 . The method of claim 11 , wherein determining the resources on the second communication link comprises:
receiving, from at least one of the base station, the first UE, or the second UE, an allocation of the resources on the second communication link.
13 . The method of claim 11 , wherein determining the resources on the second communication link comprises:
autonomously sensing the resources on the second communication link.
14 . The method of claim 1 , further comprising:
receiving, from the second reconfigurable intelligent surface, a request for the beam information message, wherein transmitting the beam information message is based at least in part on the request.
15 . The method of claim 14 , wherein the request comprises an indication of beam information for at least one of a base station or a UE.
16 . The method of claim 1 , wherein configuring the one or more reconfigurable intelligent surface elements comprises:
performing a beam refinement procedure with at least one of the base station, the first UE, or the second UE, wherein determining the beam information message is based at least in part on the beam refinement procedure.
17 . The method of claim 1 , wherein:
the first communication link comprises a cellular link; and
the second communication link comprises a sidelink.
18 . A method for wireless communications at a base station, comprising:
transmitting, to a first reconfigurable intelligent surface via a first communication link, configuration information for one or more reconfigurable intelligent surface elements for reflecting signaling between at least one of a base station and a first user equipment (UE) via a first communication link, or the first UE and a second UE via a second communication link;
receiving a capability information message on at least one of the first communication link or the second communication link, the capability information message comprising an indication that the first reconfigurable intelligent surface is capable of communicating with a second reconfigurable intelligent surface via at least one of the first communication link or the second communication link; and
communicating with at least one of the first UE, the second UE, or a second base station, via the first reconfigurable intelligent surface or the second reconfigurable intelligent surface, based at least in part on receiving the capability information message.
19 . The method of claim 18 , further comprising:
transmitting, to the first reconfigurable intelligent surface, an allocation of resources on the first communication link, for transmitting a beam information message directly to the second reconfigurable intelligent surface, the beam information message comprising at least one of one or more phase values, one or more amplitude values, or one or more codebook weight values associated with the one or more reconfigurable intelligent surface elements.
20 . The method of claim 18 , further comprising:
transmitting, to the first reconfigurable intelligent surface, an allocation of resources on the second communication link, for transmitting a beam information message directly to the second reconfigurable intelligent surface, the beam information message comprising at least one of one or more phase values, one or more amplitude values, or one or more codebook weight values associated with the one or more reconfigurable intelligent surface elements.
21 . The method of claim 18 , further comprising:
receiving, from the first reconfigurable intelligent surface via the first communication link, a beam information message, the beam information message comprising at least one of one or more phase values, one or more amplitude values, or one or more codebook weight values associated with the one or more reconfigurable intelligent surface elements; and
transmitting the beam information message to the second reconfigurable intelligent surface via the second communication link.
22 . The method of claim 18 , wherein the capability information message comprises an indication that the first reconfigurable intelligent surface is capable of transmitting and receiving at least one of data messages, control messages, or feedback messages via at least one of the first communication link or the second communication link.
23 . A method for wireless communications at a first user equipment (UE), comprising:
receiving, from a first reconfigurable intelligent surface, a capability information message on at least one of a first communication link or a second communication link, the capability information message comprising an indication that the first reconfigurable intelligent surface is capable of communicating with a second reconfigurable intelligent surface via at least one of the first communication link or the second communication link; and
communicating with at least one of a base station, or a second UE, via the first reconfigurable intelligent surface or the second reconfigurable intelligent surface, based at least in part on receiving the capability information message.
24 . The method of claim 23 , further comprising:
transmitting, to the first reconfigurable intelligent surface, an allocation of resources on the second communication link for transmitting a beam information message directly to the second reconfigurable intelligent surface, wherein the capability information message comprising an indication that the first reconfigurable intelligent surface is capable of communicating with the second reconfigurable intelligent surface via at least one of the first communication link or the second communication link.
25 . The method of claim 24 , wherein:
the capability information message comprises a request for assistance in identifying resources on the second communication link; and
transmitting the allocation of resources on the second communication link is based at least in part on receiving the capability information message.
26 . The method of claim 23 , further comprising:
receiving, from the first reconfigurable intelligent surface via the second communication link, a beam information message, the beam information message comprising at least one of one or more phase values, one or more amplitude values, or one or more codebook weight values associated with one or more reconfigurable intelligent surface elements; and
transmitting the beam information message to the second reconfigurable intelligent surface via the second communication link.
27 . The method of claim 23 , wherein the capability information message comprises an indication that the first reconfigurable intelligent surface is capable of transmitting and receiving at least one of data messages, control messages, or feedback messages via at least one of the first communication link or the second communication link.
28 . An apparatus for wireless communications at a first reconfigurable intelligent surface, comprising:
a processor;
memory coupled with the processor; and
instructions stored in the memory and executable by the processor to cause the apparatus to:
configuring, by a controller of the first reconfigurable intelligent surface, one or more reconfigurable intelligent surface elements for reflect signaling between at least one of a base station and first user equipment (UE) via a first communication link, or the first UE and a second UE via a second communication link;
transmit a capability information message on at least one of the first communication link or the second communication link, the capability information message comprising an indication that the first reconfigurable intelligent surface is capable of communicating with a second reconfigurable intelligent surface via at least one of the first communication link or the second communication link; and
transmit a beam information message to the second reconfigurable intelligent surface based at least in part on the capability information message via at least one of the first communication link or the second communication link, the beam information message comprising at least one of one or more phase values, one or more amplitude values, or one or more codebook weight values associated with the one or more reconfigurable intelligent surface elements.
29 . The apparatus of claim 28 , wherein the instructions are further executable by the processor to cause the apparatus to:
include, in the beam information message, at least one of an identifier for the first reconfigurable intelligent surface, or an identifier for the second reconfigurable intelligent surface, an identifier for the base station, an identifier for the first UE, an identifier for the second UE, an indication of a pairing of the base station and the UE, or an indication of a pairing between the first UE and the second UE.
30 . The apparatus of claim 28 , wherein the instructions are further executable by the processor to cause the apparatus to:
include, in the capability information message, an indication that the first reconfigurable intelligent surface is capable of transmitting and receiving at least one of data messages, control messages, or feedback messages via at least one of the first communication link or the second communication link, an indication that the first reconfigurable intelligent surface is capable of autonomously identifying resources on the second communication link, or a request for assistance in identifying resources on the second communication link.