US 12,408,131 B2
Network node, device to device user equipment, and methods in a radio communications network
Haris Celik, Stockholm (SE); Muhammad Kazmi, Sundbyberg (SE); and Santhan Thangarasa, Vällingby (SE)
Assigned to Telefonaktiebolaget LM Ericsson (Publ), Stockholm (SE)
Appl. No. 17/911,286
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Mar. 31, 2020, PCT No. PCT/SE2020/050330
§ 371(c)(1), (2) Date Sep. 13, 2022,
PCT Pub. No. WO2021/201731, PCT Pub. Date Oct. 7, 2021.
Prior Publication US 2023/0113017 A1, Apr. 13, 2023
Int. Cl. H04W 56/00 (2009.01); H04L 27/26 (2006.01)
CPC H04W 56/004 (2013.01) [H04L 27/2605 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method performed by a Network Node, NN, for handling Device to Device, D2D, operation between a first D2D User Equipment, UE, and a second D2D UE in a radio communications network, the method comprising:
obtaining data related to propagation delay in one or more cells served by the NN, which propagation delay is related to any one or more out of: the first D2D UE, the second D2D UE, other D2D UEs, and cellular UEs; and
determining to configure a number of Guard Period, GP, symbols within a switching time resource, as Sidelink, SL, radio resources for the D2D operation, the determining being based on one or more criteria applied to the obtained data related to the propagation delay, the one or more criteria comprising a threshold value related to any one or more of:
a load of cellular UEs in a cell;
a location of cellular UEs in a cell;
a load of the D2D UEs in a cell;
a location of the D2D UEs in a cell;
whether transmit power of the D2D UEs for SL operation may be controlled;
whether signals or messages are associated with criticality;
a periodicity of SL signals that may be transmitted over the GP resources;
one or both of a type of signals and a type of channels;
interference situations as experienced by the network node and/or UEs; and
sending a configuration to respective any one or more out of the first D2D UE and the second D2D UE, which configuration relates to the determined number of GP symbols within the switching time resource to be configured as SL radio resources for the D2D operation, the configuration indicating a time period during which the determined number of GP symbols within the switching time resource is to be configured as SL radio resources for the D2D operation.