US 12,010,657 B2
Robust grant-free transmissions
Mehdi Alasti, Arlington, VA (US); Siddhartha Chenumolu, Ashburn, VA (US); and Mariam Sorond, Reston, VA (US)
Assigned to DISH Wireless L.L.C., Littleton, CO (US)
Filed by DISH Wireless L.L.C., Littleton, CO (US)
Filed on Dec. 28, 2022, as Appl. No. 18/147,534.
Application 18/147,534 is a continuation of application No. 17/391,436, filed on Aug. 2, 2021, granted, now 11,570,758.
Application 17/391,436 is a continuation of application No. 16/410,889, filed on May 13, 2019, granted, now 11,109,352, issued on Aug. 31, 2021.
Claims priority of provisional application 62/754,075, filed on Nov. 1, 2018.
Prior Publication US 2023/0171742 A1, Jun. 1, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 72/02 (2009.01); H04J 11/00 (2006.01); H04L 1/1867 (2023.01); H04W 72/044 (2023.01); H04W 72/1263 (2023.01); H04W 84/04 (2009.01)
CPC H04W 72/02 (2013.01) [H04J 11/004 (2013.01); H04L 1/189 (2013.01); H04W 72/044 (2013.01); H04W 72/1263 (2013.01); H04W 84/042 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method for performing grant-free uplink transmissions, the method comprising:
determining, by a first user equipment (UE), data that is to be transmitted using a grant-free uplink transmission to a base station of a cellular network;
selecting, by the first UE, a first grant-free resource block, wherein:
a plurality of grant-free resource blocks define a plurality of subcarrier frequencies and a plurality of timeslots for data to be transmitted to the base station of the cellular network without a reservation by the first UE;
selecting, by the first UE, a second grant-free resource block;
selecting, by the first UE, a third grant-free resource block;
transmitting, by the first UE, a first grant-free transmission that comprises: 1) a data payload; 2) a first pointer; and 3) a second pointer, wherein:
the first pointer refers to the second grant-free resource block; and
the second pointer refers to the third grant-free resource block;
receiving, by the base station, the first grant-free transmission transmitted by the first UE on the first grant-free resource block;
detecting, by the base station, a collision on the second grant-free resource block, wherein the collision results from a second grant-free transmission being received during a same timeslot and a same frequency as a third grant-free transmission from a second UE distinct from the first UE; and
based on the first pointer of the first grant-free transmission, performing interference cancelation to subtract at least a portion of the first grant-free transmission from the collision to reconstruct the third grant-free transmission transmitted by the second UE at the second grant-free resource block.