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Patent Agency Ranking
公开(公告)号：US20170201362A1
公开(公告)日：2017-07-13
申请号：US15403498
申请日：2017-01-11
Inventor： Ok-Sun Park , Cheulsoon Kim , Gi Yoon Park , Changhee Lee
Abstract: In a system supporting narrowband Internet of things (NB-IoT), a terminal maps an uplink reference signal to a plurality of resource elements in a scheduled resource allocation unit, and transmits the uplink reference signal mapped to the plurality of resource elements. Here, the scheduled resource allocation unit includes a first number of contiguous slots in a time domain and a second number of contiguous subcarriers in a frequency domain.
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公开(公告)号：US10447445B2
公开(公告)日：2019-10-15
申请号：US15403498
申请日：2017-01-11
Inventor： Ok-Sun Park , Cheulsoon Kim , Gi Yoon Park , Changhee Lee
Abstract: In a system supporting narrowband Internet of things (NB-IoT), a terminal maps an uplink reference signal to a plurality of resource elements in a scheduled resource allocation unit, and transmits the uplink reference signal mapped to the plurality of resource elements. Here, the scheduled resource allocation unit includes a first number of contiguous slots in a time domain and a second number of contiguous subcarriers in a frequency domain.
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3.发明授权公开(公告)号：US10004089B2
公开(公告)日：2018-06-19
申请号：US15192328
申请日：2016-06-24
Inventor： Changhee Lee , Taesoo Kwon , Jae Heung Kim , Jung-Im Kim , Ok-Sun Park , JaeSheung Shin , Sung-Min Oh , Hyun-yong Hwang
CPC classification number: H04W74/0841 , H04W74/006
Abstract: A base station infers a random access failure rate depending on a random access collision of terminals performing random access and controls a random access opportunity of a terminal that fails the random access by using the random access failure rate of each terminal. Also, information for the controlled random access opportunity is transmitted to the terminal that fails the random access.
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公开(公告)号：US09867156B2
公开(公告)日：2018-01-09
申请号：US14820551
申请日：2015-08-06
Inventor： Changhee Lee , Wooram Shin , Sung-Min Oh , Ae-Soon Park , Jeong Hwan Lee
CPC classification number: H04W56/004 , H04L27/2678 , H04W56/0095 , H04W76/14 , H04W88/04
Abstract: A method for synchronization by a D2D terminal in a D2D communication network through receiving a first D2D synchronization signal from at least one D2D synchronization source and performing synchronization according to a synchronization timing reference provided through the first D2D synchronization signal, and a method for negotiating whether to perform a role as a synchronization source with another D2D synchronization source through determining, when a D2D synchronization signal and a D2D synchronization channel are received from at least one D2D synchronization source, whether to maintain a role as the independent synchronization source based on negotiation information for negotiation between synchronization sources included in the D2D synchronization channel, and operating as a relaying synchronization source when the role as the independent synchronization source is not maintained, are provided.
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公开(公告)号：US09832800B2
公开(公告)日：2017-11-28
申请号：US14818418
申请日：2015-08-05
Inventor： Wooram Shin , Changhee Lee , Sung-Hyun Moon , Young Jo Ko
CPC classification number: H04W76/14 , H04W28/18 , H04W72/1278 , H04W92/18
Abstract: A first terminal receives a first Timing Advance (TA) value from a base station and includes a second TA value that is obtained based on the first TA value in a Scheduling Assignment (SA) signal. The first terminal transmits the SA signal to a second terminal at downlink (DL) timing for receiving a downlink signal of the base station in cellular communication. When a length of a Cyclic Prefix (CP) that is set for the D2D communication and a length of a CP that is set for the cellular communication are different, the first terminal transmits data of the D2D communication to the second terminal at first timing that is obtained by applying the second TA value to the DL timing.
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