INDIAN INSTITUTE OF TECHNOLOGY MADRAS (IIT MADRAS)

A method of Side-Link positioning by at least one first node is described. The method includes receiving at least one location service request from at least one entity for estimating a location of at least one fourth node. The method further includes establishing a communication link with at least one second node, at least one third node, or the at least one fourth node. The method further includes estimating the location of the at least one fourth node using location identification procedures involving at least one of the at least one second node, the at least one third node, and the at least one fourth node based on the at least one location service request. The method further includes transmitting at least one location service response to the at least one entity.

A method for beam management in side-link communication between User Equipment (UEs) ( 104 ) operating in a wireless communication network ( 100 ) is described. The method comprises transmitting a reference signal using at least one beam by a first UE ( 104 - 1 ). The first UE ( 104 - 1 ) receives a feedback report of the at least one beam based on the reference signal from the second UE ( 104 - 2, 104 - 4 ). The feedback report of the at least one beam comprises at least one of UE identifier (ID), beam ID, beam strength, and beam validity. The first UE ( 104 - 1 ) updates entries of a beam management table based on the feedback report.

The present disclosure discloses methods for reducing the reference signal (RS) density for future wireless systems. The method comprising The method comprising receiving, by the UE, a plurality of configuration parameters for a first reference signal transmitted using a plurality of active ports and a second reference signal transmitted on a subset of active ports, wherein the plurality of configuration parameters comprising at least one of a performance metric, a criteria for performance monitoring, and configuration settings for the first reference signal and the second reference signal, receiving, by the UE, at least one of the first reference signal and the second reference signal in a first transmission occasion of the base station, determining, by the UE, the performance metric based on the at least one received reference signal, monitoring, by the UE, the performance metric to determine if the criteria for the performance monitoring is satisfied, and transmitting, by the UE, a feedback message based on the criteria for the performance monitoring.

The disclosed methodology provides a methodology to estimate channel using a single pilot symbol in a wireless communication. According to an embodiment, the method includes receiving, by a node, a plurality of modulated data symbols, and a pilot symbol. Further, the method includes determining, by the node, at least one first centroid point corresponding to the plurality of modulated data symbols. Further, the method includes determining, by the node, a distance between the pilot symbol and each of the at least one first centroid point. Further, the method includes selecting, by the node, a second centroid point from the at least one first centroid point, wherein the second centroid point is the first centroid point with a minimum distance from the pilot symbol. Further, the method includes estimating, by the node, the channel based on the second centroid point and at least one information about the pilot symbol.

The present invention relates to various signaling methods associated with a multi-transmission reception point (TRP) system. A method of indicating transmission configuration indicator (TCI) state(s) of operation for a user equipment (UE) in a telecommunication network is proposed. The method comprises receiving a media access control-control element (MAC-CE) structure. The MAC-CE structure comprises a code-point mapped to a TCI state. The TCI state is at least one of joint downlink (DL) TCI state and uplink (UL) state and at least one of joint/DL TCI state, and UL state. A downlink control information (DCI) is received. The DCI comprises a TCI field indicating a code-point of the MAC-CE structure and a flag for selection of one of joint TCI state of operation for DL and UL and separate TCI states of operation one for DL and one for UL. The TCI state is activated, based on the flag and the TCI field. The UE is operated in the at least one TCI state. Further, a method of indicating a TCI state using a group common DCI is proposed. Furthermore, a method as transmitting a hybrid automatic repeat request (HARQ) from the group of UEs using a group common physical uplink control channel (PUCCH) is proposed. Furthermore, methods for handling collisions between difference channels and signals in a M-TRP system are proposed. In the event of a collision, a signal/channel is chosen based on preconfigured rules. Additionally, methods of activating and updating TCI states for different channels in a M-TRP system are proposed. Further, methods of associating a TCI state are proposed.

A method of communication in a cellular network is described. The method comprises determining Sounding Reference Signal (SRS) antenna ports of a user equipment configured for transmission of SRSs to a base station. The SRS antenna ports are divided into a first group of antenna ports and a second group of antenna ports when a number of antenna ports is greater than a predefined number of antenna ports. Orthogonality is maintained between the SRSs of the first group of antenna ports and the SRSs of the second group of antenna ports using one of a group index, a cyclic shift, time division multiplexing, and frequency division multiplexing. A first set of SRSs are transmitted over the first group of antenna ports and a second set of SRSs are transmitted over the second group on antenna ports.

A method for managing cross-link interference in wireless communication network is de-scribed. The method comprises receiving, by a first User Equipment (UE), information re-lated to a Reference Signal (RS), from a Base Station (BS). The information is at least one of a phase rotation and a number of repetitions in time domain. The first UE may generate the RS based on the information. The first UE may transmit the RS with a first timing ad-vance to a second UE. A method for reporting the cross-link interference in the wireless communication network is described. The method comprises receiving the RS by the first UE. The first UE may determine a parameter of the RS. The first UE detects occurrence of a trigger event and transmits a report based on the parameter. The report may be transmitted to the BS using a physical layer or a medium access control (MAC) layer.

A method of communication in a cellular network is described. The method comprises establishing, by at least one first node. a connection with at least one second node. At least one first node receives capability information of the at least one second node. One or more of the at least one first node. the at least one second node. and at least one third node calibrate a channel among one or more of the at least one first node. the at least one second node, and at least one third node. The at least one first node transmits control information to the at least one second node. based on at least one of the calibration information and the capability information. The at least one second node beamforms signals transmitted to and received from the at least one third node

A method of Side-Link positioning by at least one first node is described. The method includes receiving at least one location service request from at least one entity for estimating a location of at least one fourth node. The method further includes establishing a communication link with at least one second node, at least one third node, or the at least one fourth node. The method further includes estimating the location of the at least one fourth node using location identification procedures involving at least one of the at least one second node, the at least one third node, and the at least one fourth node based on the at least one location service request. The method further includes transmitting at least one location service response to the at least one entity.

A system and a method for performing uplink (UL) time synchronization in non-terrestrial networks (NTN) include Performing Downlink (DL) synchronization SSB signals. At least one information is received by a UE 102 from an NTN BS 104 . A location information of a satellite is obtained using the at least one information received by the UE 102 . Location of the UE 102 is estimated using one of GNSS receiver of the UE 102 and by processing at least one reference signal received by the UE 102 from multiple NTN-BS 104 , using at least one multilateration technique and RTK. Timing Advance (TA) estimate is determined using the location of the satellite and location of the UE 102 . TA applied is determined using the TA estimate and TA margin. PRACH is transmitted based on the TA applied and an information related to the TA applied is reported to the NTN-BS 104 . Residual TA is estimated using the reported information related to the TA applied and the detected PRACH. The residual TA is indicated to the UE 102 for subsequent UL transmissions, in order to achieve the UL time synchronization in the NTN based communication network.