SIMPLE RACH (SRACH)

• Main Authors: DA SILVEIRA, Marthinus Willem, MCGOWAN, Neil
• Format: Patent
• Language: English; French; German
• Published: 02.08.2023
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION; WIRELESS COMMUNICATIONS NETWORKS

A method of operation of a wireless device (80) to perform random access in a cellular communications network (74) in disclosed. The method comprises transmitting a random access preamble on a physical random access channel in an uplink from the wireless device (80) to a radio access node (76) in the cellular communications network (74). The physical random access channel has a subcarrier frequency spacing that is equal to a subcarrier frequency spacing in one or more other channels of the uplink, wherein the subcarrier frequency spacing of both the physical random access channel and the one or more other channels of the uplink is X·15 kilohertz, where X ≥ 1, and wherein a bandwidth of the physical random access channel is X·M·15 kilohertz. The random access preamble is based on a base random access sequence, and a length of the base random access sequence is less than or equal to M. The method further comprises, in response to transmitting the random access preamble, receiving a random access response from the radio access node (76).