公开(公告)号：US10158698B2

公开(公告)日：2018-12-18

申请号：US14433626

申请日：2013-10-04

Applicant: Samsung Electronics Co., Ltd.

Inventor： Ji-Cheol Moon ,  Woo Jae Kim ,  Ki Ho Cho ,  Dong Jin Lee

IPC: H04L29/08 ,  H04L29/06 ,  H04W36/00

Abstract: A method for transmitting data in a core cache server of a communication system, according to one embodiment of the present invention, comprises the steps of: receiving, from a source base station, a core cache search signal; selecting a relay core cache unit according to the received core cache search signal; and transmitting content data to a target base station through the selected relay core cache unit. A cache server for transmitting and receiving data in a communication system, according to another embodiment of the present invention, comprises: one or more core cache units for storing content data; a receiving unit for receiving, from a source base station, a core cache search signal; a control unit for selecting a relay core cache unit among the one or more core cache units according to the received core cache search signal; and a transmission unit for transmitting the content data to a target base station through the selected relay core cache unit. When the present invention is used, the source base station can continuously provide content to a terminal by transmitting session information and the content to a target base station during a handover of the terminal by using a logical interface between base stations in an LTE system, and in this case, a core cache function is additionally provided such that it is possible to smoothly provide the content to a base station even when moving to a server that does not have a cache function. Thus, backhaul costs caused by a handover are reduced and a user can be provided with improved quality of experience.

公开(公告)号：US09071332B2

公开(公告)日：2015-06-30

申请号：US14196507

申请日：2014-03-04

Applicant: Samsung Electronics Co., Ltd.

Inventor： Jai Jin Lim ,  Woo Jae Kim

IPC: H04L7/00 ,  H04B7/26 ,  H04J3/06 ,  H04B7/185

CPC classification number: H04B7/2662 ,  H04B7/1851 ,  H04J3/0641 ,  H04J3/0644

Abstract: An enhanced base station and clock synchronization method are provided. The method includes scanning to discover a satellite transmitting a satellite signal and a master base station providing clock synchronization signal, entering, when a satellite having a signal that fulfills predetermined conditions is found, a master mode for receiving the satellite signal to acquire clock synchronization and transmitting a clock synchronization signal to at least one slave base station, and entering, when no satellite having a signal that fulfills the predetermined conditions is found, a slave mode for receiving the clock synchronization signal from the master base station to acquire clock synchronization. The method allows the base station to switch between the master and slave modes dynamically according to variation of the communication environment, resulting in efficient clock synchronization.

Abstract translation: 提供增强的基站和时钟同步方法。 该方法包括：扫描发送卫星信号的卫星和提供时钟同步信号的主基站，当发现具有满足预定条件的信号的卫星时，进入用于接收卫星信号以获取时钟同步的主模式， 向至少一个从基站发送时钟同步信号，并且当没有找到具有满足预定条件的信号的卫星时，进入从主基站接收时钟同步信号以获取时钟同步的从模式。 该方法允许基站根据通信环境的变化动态地在主模式和从模式之间切换，从而产生有效的时钟同步。