CPC H04W 74/0841 (2013.01) [H04L 5/1469 (2013.01); H04W 74/0866 (2013.01)] | 18 Claims |
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.
|