Enhanced RACH (random access channel) design for 5G CIOT (cellular internet of things)

US11924892B2 · kind B2 · utility

Assignee

• Apple Inc. · US

Inventors

• Kathiravetpillai Sivanesan · Portland, US
• Yaser Mohamed Mostafa Kamal FOUAD · North Plains, US
• Vesh Raj Sharma Banjade · Hillsboro, US
• Joonbeom Kim · Carrollton, US
• Balkan Kecicioglu · Erie, US
• Rath Vannithamby · Portland, US

Key dates

• Filing date: Jun 27, 2022
• Grant date: Mar 5, 2024
• Expiry date: Jun 27, 2042

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04W4/70
• WIPO field: Digital communication
• WIPO sector: Electrical engineering

Abstract

Techniques for random access (RA) in a cellular internet-of-things (CIOT) are discussed. An example apparatus configured to be employed within a User Equipment (UE), comprises a receiver circuitry, a processor, and transmitter circuitry. The receiver circuitry is configured to receive RA resource allocation information via one of a system information message or a downlink control information (DCI) message. The processor is operably coupled to the receiver circuitry and configured to: select a RA preamble sequence; generate a payload; and spread the payload via a spreading sequence. The transmitter circuitry is configured to transmit, based on the RA resource allocation information, a RA message comprising the RA preamble sequence and the payload, wherein the RA message is transmitted in a RA slot. The receiver circuitry is further configured to receive a response comprising a device identity of the UE and one of an uplink (UL) grant or a RA reject message.