US 11,678,246 B2
Contention free random access failure
Kyungmin Park, Oakton, VA (US); Esmael Hejazi Dinan, Herndon, VA (US); Hyoungsuk Jeon, Fairfax, VA (US); Hua Zhou, Herndon, VA (US); and Alireza Babaei, Arlington, VA (US)
Assigned to Comcast Cable Communications, LLC, Philadelphia, PA (US)
Filed by Comcast Cable Communications, LLC, Philadelphia, PA (US)
Filed on Aug. 13, 2018, as Appl. No. 16/102,408.
Claims priority of provisional application 62/544,157, filed on Aug. 11, 2017.
Prior Publication US 2019/0053120 A1, Feb. 14, 2019
Int. Cl. H04W 36/30 (2009.01); H04W 76/27 (2018.01); H04W 74/08 (2009.01); H04W 24/10 (2009.01); H04W 36/00 (2009.01)
CPC H04W 36/305 (2018.08) [H04W 74/0833 (2013.01); H04W 76/27 (2018.02); H04W 24/10 (2013.01); H04W 36/0077 (2013.01)] 49 Claims
OG exemplary drawing
 
1. A method comprising:
receiving, by a distributed unit associated with a base station from a central unit associated with the base station, a first message comprising cell configuration parameters of a cell;
sending, by the distributed unit to the central unit, an indication of a random access (RA) resource of the cell for a wireless device; and
based on determining that the distributed unit did not receive at least one RA preamble from the wireless device via the RA resource of the cell after the sending the indication, sending, by the distributed unit to the central unit, an RA failure indication associated with the wireless device.