US 12,238,782 B2
Methods and apparatuses for performing preamble assignment for random access in a telecommunications system
Michael Meyer, Aachen (DE); and Magnus Stattin, Spånga (SE)
Assigned to TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm (SE)
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Filed on Aug. 10, 2023, as Appl. No. 18/447,476.
Application 18/447,476 is a continuation of application No. 17/130,367, filed on Dec. 22, 2020, granted, now 11,729,831.
Application 17/130,367 is a continuation of application No. 16/666,487, filed on Oct. 29, 2019, granted, now 10,912,127, issued on Feb. 2, 2021.
Application 16/666,487 is a continuation of application No. 16/190,425, filed on Nov. 14, 2018, granted, now 10,499,438, issued on Dec. 3, 2019.
Application 16/190,425 is a continuation of application No. 15/619,766, filed on Jun. 12, 2017, granted, now 10,165,601, issued on Dec. 25, 2018.
Application 15/619,766 is a continuation of application No. 15/185,480, filed on Jun. 17, 2016, granted, now 9,706,579, issued on Jul. 11, 2017.
Application 15/185,480 is a continuation of application No. 13/947,191, filed on Jul. 22, 2013, granted, now 9,480,084, issued on Oct. 25, 2016.
Application 13/947,191 is a continuation of application No. 13/002,314, granted, now 8,493,917, issued on Jul. 23, 2013, previously published as PCT/SE2008/051534, filed on Dec. 19, 2008.
Claims priority of provisional application 61/077,295, filed on Jul. 1, 2008.
Prior Publication US 2023/0389085 A1, Nov. 30, 2023
Int. Cl. H04W 4/00 (2018.01); H04W 72/0446 (2023.01); H04W 72/23 (2023.01); H04W 74/0833 (2024.01); H04W 88/02 (2009.01); H04W 88/08 (2009.01)
CPC H04W 74/0833 (2013.01) [H04W 72/0446 (2013.01); H04W 72/23 (2023.01); H04W 88/02 (2013.01); H04W 88/08 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A method performed by a radio base station for assigning a preamble to a user equipment (UE) for facilitating the UE to perform a random access, the radio base station being allocated a first set forming a pool of non-dedicated random access preambles and a second set forming a pool of dedicated random access preambles, the method comprising:
sending a physical random access channel (PRACH) configuration indicating possible PRACH occurrences for random access; and
transmitting a message to the UE, the message comprising an indication of an available dedicated random access preamble of the second set, and wherein the message further comprises a field with a binary value, the binary value corresponding to a PRACH index into a table that contains values indicating for which one or more of the PRACH occurrences, out of the possible PRACH occurrences, the dedicated random access preamble is valid to be used by the UE for the random access.