US 10,433,343 B2
Method and apparatus for improving random access procedure in a wireless communication system
Wei-Yu Chen, Taipei (TW); and Li-Chih Tseng, Taipei (TW)
Assigned to ASUSTek Computer Inc., Taipei (TW)
Filed by ASUSTek Computer Inc., Taipei (TW)
Filed on Jul. 28, 2017, as Appl. No. 15/663,662.
Claims priority of provisional application 62/367,765, filed on Jul. 28, 2016.
Claims priority of provisional application 62/367,897, filed on Jul. 28, 2016.
Claims priority of provisional application 62/367,967, filed on Jul. 28, 2016.
Prior Publication US 2018/0035469 A1, Feb. 1, 2018
Int. Cl. H04W 74/08 (2009.01); H04W 72/10 (2009.01); H04W 74/00 (2009.01)
CPC H04W 74/0833 (2013.01) [H04W 72/10 (2013.01); H04W 74/002 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A method of a UE (User Equipment) for performing random access procedure, comprising:
the UE receives a first back-off information from a first base station in a dedicated message, wherein the first back-off information includes a granularity information;
the UE transmits a first preamble to a second base station;
the UE determines a back-off interval based on the first back-off information and a second back-off information, wherein the second back-off information is received when the UE monitors a response for the first preamble; and
the UE transmits a second preamble to the second base station after a back-off time, wherein the back-off time is randomly selected within the back-off interval.