Patent ID: 11930538
Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method, performed by a network node, for configuring a physical random-access channel (PRACH) of a cell in a time-division-duplexed (TDD) radio access network (RAN), the method comprising:
determining an increase in a level of remote interference in the cell, wherein determining the increase in the level of remote interference comprises one or more of the following:
detecting an observed increase or an observed rate of increase in interference levels during one or more uplink (UL) symbols immediately following a downlink-to-uplink switch of a cell transmission direction;
determining a distribution of propagation delays of the remote interference by estimating interference levels in a plurality of UL symbols immediately following a downlink-to-uplink switch of the cell transmission direction; and
receiving remote interference management reference signals (RIM-RS);

in response to determining the increase, selecting a first PRACH configuration from a first subset of available PRACH configurations, wherein:
the first subset of available PRACH configurations is more robust against remote interference than a second subset of the available PRACH configurations, and
the first subset is exclusive of the second subset; and

transmitting, to one or more user equipment (UEs), first information indicating that the first PRACH configuration should be used for accessing the cell via the PRACH.