US Patent No. 10,368,352

DATA TRANSMISSION METHOD AND APPARATUS BY DEVICE TO DEVICE TERMINAL IN WIRELESS COMMUNICATION SYSTEM


Patent No. 10,368,352
Issue Date July 30, 2019
Title Data Transmission Method And Apparatus By Device To Device Terminal In Wireless Communication System
Inventorship Hyukjin Chae, Seoul (KR)
Hanbyul Seo, Seoul (KR)
Byounghoon Kim, Seoul (KR)
Myoungseob Kim, Seoul (KR)
Assignee LG ELECTRONICS INC., Seoul (KR)

Claim of US Patent No. 10,368,352

1. A method of transmitting a discovery signal by a Device-to-Device (D2D) User Equipment (UE) in a wireless communication system, the method comprising:determining a subframe pool in a discovery period; and
transmitting the discovery signal in a subframe included in the subframe pool,
wherein a frequency resource index on which the discovery signal is transmitted on the discovery period is determined by using:
(f_shift+floor((nf+Nf*nt)/Nt))mod Nf
wherein a time resource index on which the discovery signal is transmitted on the discovery period is determined by using:
(t_shift+nf+Nf*nt)mod Nt
where Nf is determined based on a number of discovery resources per subframe, Nt is determined based on a number of subframes per discovery period, f_shift is a frequency shift, t_shift is a subframe shift, nf is a frequency resource index on which the discovery signal is transmitted on a previous discovery period, and nt is a time resource index on which the discovery signal is transmitted on the previous discovery period,
wherein f_shift and t_shift are determined from values indicated by a higher-layer parameter, and
wherein f_shift varies based on the discovery period and not based on a cell ID.