US 12,262,402 B2
Communication system
Vivek Sharma, Sutton (GB); and Yuhua Chen, London (GB)
Assigned to NEC CORPORATION, Tokyo (JP)
Appl. No. 15/543,294
Filed by NEC Corporation, Tokyo (JP)
PCT Filed Jan. 13, 2016, PCT No. PCT/JP2016/000139
§ 371(c)(1), (2) Date Jul. 13, 2017,
PCT Pub. No. WO2016/121307, PCT Pub. Date Aug. 4, 2016.
Claims priority of application No. 1501617 (GB), filed on Jan. 30, 2015.
Prior Publication US 2018/0035436 A1, Feb. 1, 2018
Int. Cl. H04W 72/542 (2023.01); H04W 16/14 (2009.01); H04W 76/15 (2018.01); H04W 84/04 (2009.01); H04W 84/12 (2009.01); H04W 88/06 (2009.01)
CPC H04W 72/542 (2023.01) [H04W 16/14 (2013.01); H04W 76/15 (2018.02); H04W 84/042 (2013.01); H04W 84/12 (2013.01); H04W 88/06 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A secondary base station for providing dual connectivity, with a master base station, to a user equipment (UE), the secondary base station comprising:
at least one memory storing instructions; and
at least one processor configured to process the instructions to:
transmit, in a downlink (DL) DATA DELIVERY STATUS frame to the master base station, first information indicating a desired buffer size and second information indicating whether a radio link is unavailable, wherein:
the desired buffer size is zero to cause the master base station receiving the DL DATA DELIVERY STATUS frame to stop transmitting data to the UE, and
the second information is used by the master base station to determine a cause of the stopping.