US 11,968,570 B2
Techniques for handovers in the presence of directional wireless beams
Sumeeth Nagaraja, San Diego, CA (US); Ajay Gupta, San Diego, CA (US); Vinod Menon, San Diego, CA (US); and Tao Luo, San Diego, CA (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Sep. 13, 2017, as Appl. No. 15/703,460.
Claims priority of provisional application 62/396,149, filed on Sep. 17, 2016.
Prior Publication US 2018/0084473 A1, Mar. 22, 2018
Int. Cl. H04W 36/00 (2009.01); H04W 24/04 (2009.01); H04W 36/08 (2009.01); H04W 72/044 (2023.01); H04W 74/0833 (2024.01)
CPC H04W 36/0066 (2013.01) [H04W 24/04 (2013.01); H04W 36/0077 (2013.01); H04W 36/0079 (2018.08); H04W 74/0833 (2013.01); H04W 36/08 (2013.01); H04W 72/046 (2013.01)] 58 Claims
OG exemplary drawing
 
1. A method for a handover of a user equipment (UE) from a serving base station to a target base station, comprising:
receiving, at the target base station, a measurement report;
selecting, by the target base station based at least in part on the measurement report, a plurality of directional wireless communication links from a total number of directional wireless communication links associated with the target base station;
generating, by the target base station based at least in part on the measurement report and the selecting, a first message comprising access parameters for each of the plurality of directional wireless communication links between the UE and the target base station, the access parameters indicating dedicated random access resources to the UE and comprising a first preamble index that is associated with a first directional wireless communication link of the plurality of directional wireless communication links, the dedicated random access resources comprising dedicated time resources;
transmitting, by the target base station, the first message to the UE via the serving base station, the first message indicating the dedicated random access resources comprising the dedicated time resources for each of the plurality of directional wireless communication links; and
receiving, at the target base station from the UE based at least in part on the dedicated random access resources indicated in the first message, a second message via one or more of the plurality of directional wireless communication links included in the first message.