Granted Patent B2

US 12,543,207 · App. 18/238,239 · Granted Feb 3, 2026

Inventors: Ankur Goyal (Bangalore, IN); Anusha Gunturu (Bangalore, IN); Mohammed Saquib Noorulhuda Khan (Bangalore, IN); Ashok Kumar Reddy Chavva (Bangalore, IN); Hari Krishna Boddapati (Bangalore, IN)

Assignee: SAMSUNG ELECTRONICS CO., LTD.

H04W72/54H04W76/27

Abstract

Claims (35)

1 . A method of beam failure recovery managed by a transmitter of a communication system, the method comprising:

detecting a first occurrence of a beam failure between the transmitter and a receiver;

based on the detection of the first occurrence of the beam failure, identifying at least one first reconfigurable intelligent surface (RIS) for transmitting at least one reference signal;

transmitting the at least one reference signal to the at least one first RIS;

receiving, from the at least one first RIS, a receiver feedback for the at least one reference signal;

generating an RIS candidate beam list based on the receiver feedback; and

transmitting, to the receiver via the at least one first RIS, a radio resource control(RRC) message including the RIS candidate beam list as a beam failure recovery configuration.

2 . The method as claimed in claim 1 , further comprising:

setting an RIS configuration mode for the at least one first RIS for selection of weight parameters to cover an area of target receivers; and

transmitting the set RIS configuration mode to the at least one first RIS.

3 . The method as claimed in claim 2 , wherein the weight parameters include parameters related to a reflection coefficient, a phase of the at least one reference signal, and an amplitude of the at least one reference signal, and

wherein the RIS configuration mode includes values associated with each of the reflection coefficient, the phase, and the amplitude of the at least one reference signal in a desired direction at a desired angle.

4 . The method as claimed in claim 1 , wherein the receiver feedback is received in response to the transmitted at least one reference signal, and

wherein each of the at least one reference signal and the RRC message are transmitted periodically at a predefined time interval, the predefined time interval being signaled to the receiver via RRC signaling.

5 . The method as claimed in claim 1 , further comprising:

determining a priority threshold value based on a receiver position, the receiver feedback, a position of the at least one first RIS, a historical pattern of signal blockage, and priority threshold values that are previously determined by the transmitter,

wherein the RRC message further includes the priority threshold value.

6 . The method as claimed in claim 1 , further comprising:

detecting a second occurrence of a beam failure between the at least one first RIS and the receiver;

based on the detection of the second occurrence of the beam failure:

identifying at least one second RIS for transmitting the at least one reference signal, and

changing an assigned priority of the generated RIS candidate beam list for beam failure recovery; and

transmitting, based on the change in the assigned priority, the RRC message to the receiver via the at least one second RIS.

7 . An apparatus for managing a beam failure recovery in a communication system, the apparatus comprising:

a transmitter; and

at least one processor,

wherein the at least one processor is configured to:

detect an occurrence of a beam failure between the transmitter and a receiver;

based on the detection of the occurrence of the beam failure, identify at least one RIS for transmitting at least one reference signal;

generate an RIS candidate beam list based on a candidate signal received from the at least one first RIS; and

control the transmitter to transmit via the at least one identified RIS, a radio resource control (RRC) message to the receiver, the RRC message including the generated RIS candidate beam list as a beam failure recovery configuration.

8 . The apparatus as claimed in claim 7 , wherein each RIS includes an array of unit cells, and

each of the unit cells in the array of unit cells comprises substantially identical passive elements.

9 . The apparatus as claimed in claim 8 , wherein each of the unit cells is configured to operate as a reflective element, and

one or more unit cells are configured to be within the array of unit cells to vary phase and amplitude of signals that are reflected from the corresponding RIS toward the receiver.

Assignments (1)

Priority Claims (2)

Continuity (2)

References Cited (21)