公开(公告)号：US09179269B2

公开(公告)日：2015-11-03

申请号：US14025305

申请日：2013-09-12

Applicant: Electronics and Telecommunications Research Institute

Inventor： Hyun Lee ,  Mi Young Yun ,  Seok Ki Kim ,  Won-Ik Kim ,  Chul Sik Yoon ,  Sung Cheol Chang

IPC: H04B7/00 ,  H04W4/10 ,  H04W74/08 ,  H04W56/00

CPC classification number: H04W4/10 ,  H04W56/005 ,  H04W74/0841

Abstract: A method and apparatus for transmitting a synchronization signal in a talk-around direct communication network is provided. The method includes: determining one of a plurality of second windows included in a first window as a synchronization reception window; selecting one of a plurality of synchronization slots included in the second windows as a first synchronization slot; transmitting a first synchronization signal through the first synchronization slot included in the second windows, excluding the synchronization reception window; detecting a second synchronization signal transmitted from other terminals using the first synchronization slot included in the synchronization reception window; and determining that a collision from amongst the synchronization signals has occurred based on the detection result.

Abstract translation: 提供了一种用于在通话对话直接通信网络中发送同步信号的方法和装置。 该方法包括：将包括在第一窗口中的多个第二窗口中的一个确定为同步接收窗口; 选择包括在第二窗口中的多个同步槽中的一个作为第一同步槽; 通过除了同步接收窗口之外的包括在第二窗口中的第一同步时隙发送第一同步信号; 使用包括在同步接收窗口中的第一同步时隙检测从其他终端发送的第二同步信号; 并且基于检测结果确定已经发生了来自同步信号之间的冲突。

公开(公告)号：US20130294233A1

公开(公告)日：2013-11-07

申请号：US13886635

申请日：2013-05-03

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE ,  Industry-Academic Cooperation Foundation, Chosun University

Inventor： Won-Ik Kim ,  Seokki Kim ,  Sung Kyung Kim ,  Mi Young Yun ,  Hyun Lee ,  Chul Sik Yoon ,  Sung Cheol Chang ,  Seokjoo Shin

IPC: H04W28/04

CPC classification number: H04W74/085 ,  H04W74/006 ,  H04W74/0833

Abstract: A method of controlling a base station is disclosed that provides service to a first terminal and a second terminal having higher priority than the first terminal. The base station determines whether there is an influx of call connection attempts when the lower-priority terminal and the higher-priority terminal perform ranging. If it is determined that there is an influx of call connection attempts, the base station sets the initial ranging backoff window size included in an information element of S-SFH SP3 (Secondary-Superframe Header SubPacket3) to a first size. If it is determined that there is an influx of call connection attempts, the base station sets the initial ranging backoff window size for the second terminal in an AAI-SCD (Advanced Air Interface-System Configuration Descriptor) message to a second size. Accordingly, it is possible to achieve a high probability of success of initial ranging of a higher-priority terminal.

Abstract translation: 公开了一种控制基站的方法，其向第一终端和具有比第一终端优先级高的第二终端提供服务。 当低优先级终端和较高优先级终端执行测距时，基站确定是否存在呼叫连接尝试的涌入。 如果确定存在呼叫连接尝试的流入，则基站将包括在S-SFH SP3（Secondary-Superframe Header SubPacket3）的信息元素中的初始测距退避窗口大小设置为第一大小。 如果确定存在呼叫连接尝试的涌入，则基站将AAI-SCD（高级空中接口 - 系统配置描述符）消息中的第二终端的初始测距退避窗口大小设置为第二大小。 因此，可以实现较高优先级终端的初始测距的高成功概率。