公开(公告)号：US20190037628A1

公开(公告)日：2019-01-31

申请号：US16152329

申请日：2018-10-04

Applicant: Electronics and Telecommunications Research Institute

Inventor： Mi Jeong YANG ,  Jae Wook SHIN ,  Ae-Soon PARK

IPC: H04W76/18 ,  H04W72/04 ,  H04W8/02

Abstract: There are provided a method for processing an exceptional case of establishing a default bearer and a device therefor in order to solve a problem in that a user equipment cannot actually receive an IP service by accessing a packet network while failing in establishing the default bearer in a mobile communication system. A method for processing an exceptional case of establishing a default bearer in a mobility management entity includes: receiving a network attachment request from a user equipment; transmitting a network attachment acceptance including an activation request of the default bearer to the user equipment in response to the network attachment request; and cancelling a network attachment procedure when a completion response to the activation request of the default bearer is not received from the user equipment within a predetermined time.

公开(公告)号：US20160234789A1

公开(公告)日：2016-08-11

申请号：US15016246

申请日：2016-02-04

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Sung-Min OH ,  Changhee LEE ,  Ae-Soon PARK ,  JaeSheung SHIN ,  Jeong Hwan LEE

IPC: H04W52/24 ,  H04W4/06 ,  H04W76/02

CPC classification number: H04W52/241 ,  H04W4/06 ,  H04W52/245 ,  H04W52/383 ,  H04W76/23

Abstract: Disclosed are a method and an apparatus for controlling distributed transmission power in device-to-device (D2D) communication. The D2D devices individually control their transmission power for the D2D communication link. In addition, a first terminal calculates the transmission power based on the measured channel gain and interference-plus-noise level. The first terminal determines optimal transmission power based on the calculated transmission power by the first terminal, and transmits a transmission power change message including the optimal transmission power to a second terminal. Next, the second terminal transmits a D2D signal based on the optimal transmission power.

Abstract translation: 公开了一种用于在设备到设备（D2D）通信中控制分布式发送功率的方法和装置。 D2D设备分别控制D2D通信链路的传输功率。 此外，第一终端基于所测量的信道增益和干扰加噪声电平来计算发送功率。 第一终端基于由第一终端计算的发送功率来确定最佳发送功率，并将包括最佳发送功率的发送功率变化消息发送到第二终端。 接下来，第二终端基于最佳发送功率发送D2D信号。

公开(公告)号：US20160044710A1

公开(公告)日：2016-02-11

申请号：US14820553

申请日：2015-08-06

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Kyoung Seok LEE ,  Mi Young YUN ,  Ae-Soon PARK

IPC: H04W74/00 ,  H04W52/38 ,  H04W56/00 ,  H04W76/04 ,  H04L29/06 ,  H04W76/02

CPC classification number: H04W52/383 ,  H04L65/4076 ,  H04W52/143 ,  H04W52/243 ,  H04W56/0015 ,  H04W76/14 ,  H04W88/08

Abstract: There is provided a transmission/reception method of a base station in a device to device (D2D) communication environment in which terminals directly communicate with each other. The base station variably sets the transmission power intensity of a downlink signal over time. Furthermore, the base station broadcasts the downlink signal with set transmission power intensity.

Abstract translation: 在设备（D2D）通信环境中提供了终端彼此直接通信的基站的发送/接收方法。 基站随时间变化地设定下行链路信号的发送功率强度。 此外，基站以设定的发送功率强度广播下行链路信号。

公开(公告)号：US20160044616A1

公开(公告)日：2016-02-11

申请号：US14820551

申请日：2015-08-06

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Changhee LEE ,  Wooram SHIN ,  Sung-Min OH ,  Ae-Soon PARK ,  Jeong Hwan LEE

IPC: H04W56/00 ,  H04W72/04 ,  H04L27/26 ,  H04W24/02

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.

Abstract translation: 一种用于通过从至少一个D2D同步源接收第一D2D同步信号并根据通过第一D2D同步信号提供的同步定时参考执行同步的D2D通信网络中的D2D终端进行同步的方法，以及用于协商是否 通过当从至少一个D2D同步源接收到D2D同步信号和D2D同步信道时，基于协商信息确定是否维持作为独立同步源的角色，来执行与另一个D2D同步源的同步源的作用 用于在D2D同步信道中包括的同步源之间的协商，并且当不保持作为独立同步源的角色时，作为中继同步源进行操作。

公开(公告)号：US20140169265A1

公开(公告)日：2014-06-19

申请号：US14089323

申请日：2013-11-25

Applicant: Electronics and Telecommunications Research Institute

Inventor： Hyun Seo PARK ,  Jaesheung SHIN ,  Sung-Min OH ,  Ae-Soon PARK

IPC: H04W40/22 ,  H04W40/36

CPC classification number: H04W40/22 ,  H04W40/36

Abstract: A communication method of a terminal and a base station including a relay is provided. When the terminal attempts a connection to the base station, relays on a communication path include and transmit identifiers thereof in a first message, and the relays and the base station can simply set a communication path to the terminal. When the base station transmits data to the terminal, if the base station includes and transmits an identifier of the terminal in the data, each relay that is located on a communication path forwards data through a preset communication path.

Abstract translation: 提供了包括继电器的终端和基站的通信方法。 当终端尝试与基站的连接时，通信路径上的中继在第一消息中包括并发送其标识符，并且中继站和基站可以简单地设置到终端的通信路径。 当基站向终端发送数据时，如果基站包括并在数据中发送终端的标识符，则位于通信路径上的每个中继器通过预设通信路径转发数据。