Reconfigurable intelligent surface link identification
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a receiver may receive, from a transmitter, an indication of a signature of a reconfigurable intelligent surface (RIS). The receiver may receive a signal that is transmitted by the transmitter and redirected by the RIS. The receiver may receive, from the RIS, a sequence associated with the signature of the RIS indicating that the signal is transmitted using a link associated with the RIS. Numerous other aspects are described.
1. A receiver for wireless communication, comprising:
a memory; and
one or more processors, coupled to the memory, configured to:
receive, from a transmitter, an indication of a signature of a reconfigurable intelligent surface (RIS);
receive a signal that is transmitted by the transmitter and redirected by the RIS; and
receive, from the RIS and via one or more time domain resources associated with the signal, a sequence associated with the signature of the RIS indicating that the signal is transmitted using a link associated with the RIS, wherein the one or more time domain resources comprise an attenuated amplitude, or
wherein the signal is superposed by the sequence in the one or more time domain resources.
2. The receiver of claim 1 , wherein the one or more processors, configured to receive the sequence associated with the signature of the RIS, are configured to receive the sequence in the one or more time domain resources of a time domain resource allocation for the signal.
3. The receiver of claim 1 , wherein the one or more processors, configured to receive the sequence associated with the signature of the RIS, are configured to receive the sequence in one or more frequency domain resources of a frequency domain resource allocation for the signal.
4. The receiver of claim 1 , wherein the one or more processors, configured to receive the signal, are configured to receive a signal burst including a first set of time domain resources; and
wherein the one or more processors, to receive the sequence associated with the signature of the RIS, are configured to receive the sequence in a second set of time domain resources.
5. The receiver of claim 1 , wherein the one or more processors, configured to receive the signal, are configured to receive the signal in a first set of frequency domain resources; and
wherein the one or more processors, to receive the sequence associated with the signature of the RIS, are configured to receive the sequence in a second set of frequency domain resources.
6. The receiver of claim 1 , wherein the sequence associated with the signature of the RIS identifies the RIS and a beam state associated with the RIS.
7. The receiver of claim 1 , wherein the one or more processors are further configured to:
receive, from the RIS, a new sequence associated with the signature of the RIS, wherein the new sequence identifies the RIS, and wherein the new sequence is based at least in part on a communication parameter.
8. The receiver of claim 7 , wherein the one or more processors, configured to receive the new sequence associated with the signature of the RIS, are configured to decode the new sequence using one or more candidate sequences to identify the new sequence.
9. The receiver of claim 7 , wherein the one or more processors are further configured to:
transmit, to at least one of the transmitter or the RIS, a request to modify the sequence or the signature associated with the RIS.
10. A reconfigurable intelligent surface (RIS) for wireless communication, comprising:
a memory; and
one or more processors, coupled to the memory, configured to:
receive, from a transmitter, an indication of a signature of the RIS;
receive a signal that is to be redirected to a receiver using a link that is identified by a sequence associated with the signature of the RIS; and
redirect the signal via one or more time domain resources comprising an attenuated amplitude,
wherein the sequence associated with the signature of the RIS is transmitted in the one or more time domain resources, or
redirect the signal via one or more time domain resources, wherein the signal is superposed by the sequence in the one or more time domain resources.
11. The RIS of claim 10 , wherein the one or more processors are further configured to:
redirect a new signal to the receiver using the link that is identified by a new sequence associated with the signature of the RIS, wherein the new sequence identifies the RIS, and wherein the new sequence is based at least in part on a communication parameter.
12. A method of wireless communication performed by a receiver, comprising:
receiving, from a transmitter, an indication of a signature of a reconfigurable intelligent surface (RIS);
receiving a signal that is transmitted by the transmitter and redirected by the RIS; and
receiving, from the RIS, a sequence associated with the signature of the RIS indicating that the signal is transmitted using a link associated with the RIS, wherein the signal includes one or more time domain resources with an attenuated amplitude and the sequence is received in the one or more time domain resources.
13. The method of claim 12 , wherein receiving the sequence associated with the signature of the RIS comprises receiving the sequence in the one or more time domain resources of a time domain resource allocation for the signal.
14. The method of claim 12 , wherein receiving the sequence associated with the signature of the RIS comprises receiving the sequence in one or more frequency domain resources of a frequency domain resource allocation for the signal.
15. The method of claim 12 , wherein receiving the signal comprises receiving a signal burst including a first set of time domain resources; and
wherein receiving the sequence associated with the signature of the RIS comprises receiving the sequence in a second set of time domain resources.
16. The method of claim 12 , wherein receiving the signal comprises receiving the signal in a first set of frequency domain resources; and
wherein receiving the sequence associated with the signature of the RIS comprises receiving the sequence in a second set of frequency domain resources.
17. The method of claim 12 , wherein the sequence associated with the signature of the RIS identifies the RIS and a beam state associated with the RIS.
18. The method of claim 12 , further comprising:
receiving, from the RIS, a new sequence associated with the signature of the RIS, wherein the new sequence identifies the RIS, and wherein the new sequence is based at least in part on a communication parameter.
19. The method of claim 18 , wherein receiving the new sequence associated with the signature of the RIS comprises decoding the new sequence using one or more candidate sequences to identify the new sequence.
20. The method of claim 18 , further comprising:
transmitting, to at least one of the transmitter or the RIS, a request to modify the sequence or the signature associated with the RIS.
21. A method of wireless communication performed by a reconfigurable intelligent surface (RIS), comprising:
receiving an indication of a signature of the RIS; and
receiving a signal that is to be redirected to a receiver using a link that is identified by a sequence associated with the signature of the RIS; and
redirecting the signal via one or more time domain resources comprising an attenuated amplitude,
wherein the sequence is transmitted in the one or more time domain resources, or
redirecting the signal via one or more time domain resources, wherein the signal is superposed by the sequence in the one or more time domain resources.
22. The method of claim 21 , wherein the one or more time domain resources are associated with the signal.
23. The method of claim 21 , further comprising:
redirecting a new signal to the receiver using the link that is identified by a new sequence associated with the signature of the RIS, wherein the new sequence identifies the RIS, and wherein the new sequence is based at least in part on a communication parameter.
24. The RIS of claim 10 , wherein the one or more processors are further configured to:
receive information indicating one or more of:
a pattern associated with a transmission of the indication of the signature of the RIS, a periodicity associated with the transmission of the indication of the signature of the RIS, a duration associated with the transmission of the indication of the signature of the RIS, or
a frequency associated with the transmission of the indication of the signature of the RIS.
25. The RIS of claim 10 , wherein the RIS is configured with one or more switching gaps.
26. The method of claim 21 , further comprising: receiving information indicating one or more of:
a pattern associated with a transmission of the indication of the signature of the RIS, a periodicity associated with the transmission of the indication of the signature of the RIS, a duration associated with the transmission of the indication of the signature of the RIS, or
a frequency associated with the transmission of the indication of the signature of the RIS.
27. The method of claim 21 ,
wherein the RIS is configured with one or more switching gaps.
28. The RIS of claim 10 , wherein the indication of the signature of the RIS is received via one or more of system information signaling, radio resource control (RRC) signaling, or medium access control (MAC) signaling.
29. The RIS of claim 10 , wherein the indication of the signature of the RIS is received via configuration information, and wherein the configuration information indicates multiple RIS signatures associated with the RIS.
30. The method of claim 21 , wherein the indication of the signature of the RIS is received via one or more of system information signaling, radio resource control (RRC) signaling, or medium access control (MAC) signaling.