US 9,814,002 B2
Apparatus and method for controlling transmission power in wireless communication system
Dong Hyun Park, Seoul (KR)
Assigned to Innovative Technology Lab Co., Ltd., Seoul (KR)
Filed by Innovative Technology Lab Co., Ltd., Seoul (KR)
Filed on Jul. 11, 2016, as Appl. No. 15/207,399.
Application 15/207,399 is a continuation of application No. 14/708,026, filed on May 8, 2015, granted, now 9,420,551.
Claims priority of application No. 10-2014-0055899 (KR), filed on May 9, 2014; and application No. 10-2014-0106286 (KR), filed on Aug. 14, 2014.
Prior Publication US 2016/0323836 A1, Nov. 3, 2016
Int. Cl. H04W 52/38 (2009.01); H04W 52/24 (2009.01); H04W 4/00 (2009.01); H04W 8/00 (2009.01); H04W 76/02 (2009.01); H04W 52/02 (2009.01); H04W 72/04 (2009.01); H04W 52/32 (2009.01)
CPC H04W 52/383 (2013.01) [H04W 4/005 (2013.01); H04W 8/005 (2013.01); H04W 52/0229 (2013.01); H04W 52/243 (2013.01); H04W 52/325 (2013.01); H04W 72/0473 (2013.01); H04W 76/023 (2013.01); H04W 52/32 (2013.01); Y02B 60/50 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method of controlling transmit power for a device-to-device (D2D) communication, the method comprising:
receiving, at a User Equipment (UE), a radio resource control (RRC) message transmitted from an evolved NodeB (eNB), the RRC message comprising power information for the UE, the power information comprising D2D maximum transmit power for a first D2D transmission through a first serving cell and maximum transmit power for an uplink transmission to the eNB through a second serving cell, wherein the uplink transmission to the eNB through the second serving cell comprises a Physical Uplink Shared Channel (PUSCH) transmission;
determining whether the first D2D transmission through the first serving cell and a second D2D transmission overlap in a subframe i, wherein the first D2D transmission is prioritized over the second D2D transmission;
determining, based on the priority of the first D2D transmission, the first D2D transmission in the subframe i;
determining whether the first D2D transmission through the first serving cell and the PUSCH transmission to the eNB through the second serving cell overlap in the subframe i;
based on allocation of transmit power of the overlapped PUSCH transmission to the eNB through the second serving cell in the subframe i, adjusting transmit power of the first D2D transmission through the first serving cell in the subframe i, wherein the adjusted transmit power of the first D2D transmission is greater than zero; and
performing the first D2D transmission through the first serving cell and the PUSCH transmission to the eNB through the second serving cell in the subframe i,
wherein the transmit power of the overlapped PUSCH transmission to the eNB through the second serving cell in the subframe i is prioritized over the transmit power of the first D2D transmission through the first serving cell in the subframe i.