Patent · US Active

Method for efficient HARQ feedback using two levels of PUCCH reporting for multicast/broadcast users in NR

US12426050B2 · kind B2 · utility

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1Claims

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Assignee

NOKIA TECHNOLOGIES OY · FI

Inventors

David BHATOOLAUL · Swindon, GB
Volker PAULI · Ansbach, DE
Fasil Berhanu Tesema · Munich, DE
David Navratil · Helsinki, FI

Key dates

Filing date	Jul 28, 2021
Grant date	Sep 23, 2025
Priority date	—
Expiry date	Sep 1, 2042

Classification

Technology area (CPC H)Electricity
CPC primaryH04L2001/0093
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

Techniques of transmitting and receiving HARQ feedback for point to multipoint data packets include using two different PUCCHs for providing ACK/NACK feedback to a sequence of point-to-multipoint (PTM) data packets. For example, when a gNB sends PTM data packets (e.g., as part of a subscription) to subscriber UE's, each UE sends ACK/NACK messages in response over a first PUCCH which has a smaller bandwidth than a conventional PUCCH under which full uplink control information (UCI) may be sent. In some implementations, the ACK/NACK messages are a single bit. In response to a NACK message from a UE, the gNB allocates a second PUCCH to the UE. The UE then send additional details to explain the NACK message. In some implementations, the additional details include an identifier of a missing data (e.g., packet m of n).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.