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US 12,738,984 B2Granted
Overhead reduction in reconfigurable intelligent surface (RIS)-aided ultra-reliable and low latency (URLLC) systems
AssigneeLenovo (Beijing) Limited
InventorsTingnan Bao, Jianfeng Wang, Haiming Wang
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Abstract
Methods and apparatuses for reducing the overhead in RIS-aided URLLC system are disclosed. A method comprises determining, by applying delay outage rate (DOR) metric, an active number of reflecting elements at an RIS between the base station and a UE in an RIS-aided URLLC system; and setting the active number of reflecting elements to the RIS.
Claims6
A method performed by a base station, the method comprising:
- determining, by applying a delay outage rate (DOR) metric, an active number of reflecting elements at a reconfigurable intelligent surface (RIS) between the base station and a user equipment (UE) in an RIS-aided ultra-reliable low latency communications (URLLC) system;
- receiving from the UE statistics of a received signal-to-noise ratio (SNR) over a cascaded channel, wherein, the statistics include a cumulative density function (CDF) of the received SNR;
- and
- setting the active number of reflecting elements to the RIS,
- wherein applying the DOR metric includes determining the active number of reflecting elements using the CDF of the received SNR.
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A base station, comprising:
- at least one memory;
- and
- at least one processor coupled with the at least one memory and configured to cause the base station to:
- determine, by applying a delay outage rate (DOR) metric, an active number of reflecting elements at a reconfigurable intelligent surface (RIS) between the base station and a user equipment (UE) in an RIS-aided ultra-reliable low latency communications (URLLC) system;
- receive, from the UE, statistics of a received signal-to-noise ratio (SNR) over a cascaded channel, wherein, the statistics include a cumulative density function (CDF) of the received SNR;
- and
- set an active number of reflecting elements to the RIS,
- wherein applying the DOR metric includes determining the active number of reflecting elements using the CDF of the received SNR.
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Dependencies are inferred from the claim text.