US 11,864,158 B2
Distributed method for allocating transmission resources to D2D terminals in a cellular access network
Rita Ibrahim, Chatillon (FR); Berna Sayrac, Chatillon (FR); and Mohamad Assaad, Gif sur Yvette (FR)
Assigned to ORANGE, Issy-les-Moulineaux (FR)
Appl. No. 17/056,167
Filed by ORANGE, Issy-les-Moulineaux (FR)
PCT Filed May 15, 2019, PCT No. PCT/FR2019/051099
§ 371(c)(1), (2) Date Nov. 17, 2020,
PCT Pub. No. WO2019/220054, PCT Pub. Date Nov. 21, 2019.
Claims priority of application No. 1854184 (FR), filed on May 18, 2018.
Prior Publication US 2021/0219266 A1, Jul. 15, 2021
Int. Cl. H04W 72/02 (2009.01); H04W 4/70 (2018.01); H04W 12/06 (2021.01); H04W 72/23 (2023.01); H04W 72/563 (2023.01)
CPC H04W 72/02 (2013.01) [H04W 4/70 (2018.02); H04W 12/06 (2013.01); H04W 72/23 (2023.01); H04W 72/563 (2023.01)] 19 Claims
OG exemplary drawing
 
1. A method comprising:
allocating transmission resources, implemented by a cellular access network comprising a base station, to at least one transmitter terminal of a set Ω of pairs of terminals of index n that are candidates for direct communication, referred to as D2D terminals, a channel between two D2D terminals in direct communication being referred to as a D2D channel, wherein the allocating comprises:
defining a lookup table of correspondence between different intervals of values of a utility metric and a list of indices ordered from a minimum index to a maximum index defining a ranking of resources available for reporting an indicator of a state of a D2D channel; and
for a current transmission interval:
calculating, by each transmitter terminal of a D2D pair of the set, a value of the utility metric vn(t) assessing an energy efficiency of the D2D communication of the pair,
determining an index of a transmission resource to be used for reporting an indicator by each transmitter terminal of a D2D pair of the set by comparing its value of the utility metric vn(t) with the lookup table,
reporting, by each transmitter terminal of a D2D pair of the set, an indicator via the resource of determined index,
and determining, from said D2D transmitter terminals, a first terminal (n*) whose resource for reporting the indicator has the minimum order index, this first terminal being the D2D terminal authorized to transmit during the current transmission interval.