US 9,813,970 B2
System and method to provide small cell power control and load balancing for high mobility user equipment in a network environment
Ritesh K. Madan, Berkeley, CA (US); Ehsan Haghani, Redwood City, CA (US); and Rohit Umesh Nabar, Sunnyvale, CA (US)
Assigned to Cisco Technology, Inc., San Jose, CA (US)
Filed by CISCO TECHNOLOGY, INC., San Jose, CA (US)
Filed on Jan. 20, 2016, as Appl. No. 15/2,187.
Prior Publication US 2017/0208526 A1, Jul. 20, 2017
Int. Cl. H04W 36/32 (2009.01); H04W 72/04 (2009.01); H04W 36/22 (2009.01); H04W 52/28 (2009.01); H04W 36/00 (2009.01); H04W 72/08 (2009.01)
CPC H04W 36/32 (2013.01) [H04W 36/0094 (2013.01); H04W 36/22 (2013.01); H04W 52/285 (2013.01); H04W 72/0473 (2013.01); H04W 72/082 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method comprising:
generating feedback information by a small cell radio and a macro cell radio;
setting a high mobility handover threshold for the macro cell radio based, at least in part, on the feedback information, wherein the high mobility handover threshold is used to trigger handover of one or more high mobility user equipment (UE) associated with the macro cell radio to the small cell radio; and
setting a maximum downlink transmit power for the small cell radio based, at least in part, on the feedback information and the high mobility handover threshold, wherein setting the maximum downlink transmit power for the small cell radio further comprises:
evaluating the high mobility handover threshold for the macro cell radio in relation to a maximum Signal-to-Interference-Plus-Noise Ratio (SINR) and a minimum SINR expected for one or more UE associated with the macro cell radio;
evaluating a Radio Link Failure (RLF) failure rate for one or more low mobility UE associated with the small cell radio in relation to a maximum RLF failure rate for the small cell radio; and
setting the maximum downlink transmit power for the small cell radio to limit interference toward the one or more UE associated with the macro cell radio and to maintain the RLF failure rate of the one or more low mobility UE associated with the small cell radio below the maximum RLF failure rate, wherein based on the maximum downlink transmit power for the small cell radio being reduced, setting the high mobility handover threshold for the macro cell radio further comprises reducing the high mobility handover threshold in proportion to an amount that the maximum downlink transmit power for the small cell radio is reduced.