US Patent No. 10,973,022

MITIGATING INTER-CELL INTERFERENCE VIA GUARD PERIOD ADJUSTMENT


Patent No. 10,973,022
Issue Date April 06, 2021
Title Mitigating Inter-cell Interference Via Guard Period Adjustment
Inventorship Sanghoon Sung, Ashburn, VA (US)
Yu Wang, Fairfax, VA (US)
Udit Thakore, Fairfax, VA (US)
Dhaval Mehta, Aldie, VA (US)
Assignee Sprint Spectrum L.P., Overland Park, KS (US)

Claim of US Patent No. 10,973,022

1. A method for mitigating interference between access nodes in a wireless network, the method comprising:determining a first interference caused within a first uplink portion of a first special subframe of a first access node by a first downlink signal transmitted from a second access node, wherein the first uplink portion comprises a signal transmitted from a wireless device in a coverage area of the first access node;
determining, based on the first interference caused to the first uplink portion, that a second downlink signal transmitted from the first access node can cause a second interference to a second uplink portion of a second special subframe of the second access node;
obtaining a distance between the first and second access nodes; and
selecting a format of special subframes utilized by the first access node based on the distance, wherein special subframes of the selected format comprise a guard period between uplink pilot time slots and downlink pilot time slots of a duration sufficient to minimize the second interference,
wherein adjusting the guard period comprises switching from a first special subframe format to a second special subframe format with a longer guard period.