公开(公告)号：US20170074971A1

公开(公告)日：2017-03-16

申请号：US15241601

申请日：2016-08-19

Applicant: Apple Inc.

Inventor： Lai King Tee ,  Geng Wu ,  Jun Li ,  Yuqiang Tang ,  Neng Wang ,  Hua Xu ,  Jianglei Ma

IPC: G01S5/10 ,  H04W64/00 ,  H04W24/10 ,  H04W4/02

CPC classification number: G01S5/10 ,  H04L5/0007 ,  H04W4/02 ,  H04W24/10 ,  H04W64/00

Abstract: Neighbor cell hearability can be improved by including an additional reference signal that can be detected at a low sensitivity and a low signal-to-noise ratio, by introducing non-unity frequency reuse for the signals used for a time difference of arrival (TDOA) measurement, e.g., orthogonality of signals transmitted from the serving cell sites and the various neighbor cell sites. The new reference signal, called the TDOA-RS, is proposed to improve the hearability of neighbor cells in a cellular network that deploys 3GPP EUTRAN (LTE) system, and the TDOA-RS can be transmitted in any resource blocks (RB) for PDSCH and/or MBSFN subframe, regardless of whether the latter is on a carrier supporting both PMCH and PDSCH or not. Besides the additional TDOA-RS reference signal, an additional synchronization signal (TDOA-sync) may also be included to improve the hearability of neighbor cells.

Abstract translation: 通过对于用于到达时差（TDOA）的信号引入非单位频率重用，可以通过包括可以在低灵敏度和低信噪比下检测的附加参考信号来提高邻近小区的可听性， 测量，例如从服务小区站点和各个相邻小区站点发送的信号的正交性。 提出了称为TDOA-RS的新参考信号，以提高部署3GPP EUTRAN（LTE）系统的蜂窝网络中的相邻小区的可听性，并且可以在用于PDSCH的任何资源块（RB）中发送TDOA-RS 和/或MBSFN子帧，而不管后者是否在支持PMCH和PDSCH两者的载波上。 除了附加的TDOA-RS参考信号之外，还可以包括附加同步信号（TDOA-sync）以提高相邻小区的可听性。

公开(公告)号：US08958391B2

公开(公告)日：2015-02-17

申请号：US13745970

申请日：2013-01-21

Applicant: Apple Inc.

Inventor： Anit Lohtia ,  Yuqiang Tang ,  Miroslav Budic

IPC: H04W4/00 ,  H04W36/14 ,  H04W48/12 ,  H04W8/26 ,  H04W24/00 ,  H04W84/12

CPC classification number: H04W36/0061 ,  H04W4/06 ,  H04W8/26 ,  H04W24/00 ,  H04W36/0011 ,  H04W36/14 ,  H04W48/08 ,  H04W48/12 ,  H04W84/12 ,  H04W88/02

Abstract: In a wireless communications network, the presence of a wireless local area network in a cell segment is determined. An identifier of the wireless local area network in the cell segment is sent to at least one mobile station in the cell segment to enable the at least one mobile station to hand off to the wireless local area network. Optionally, information identifying geographic boundaries of cell segments and the wireless local area network can be sent to the at least one mobile station.

Abstract translation: 在无线通信网络中，确定小区段中的无线局域网的存在。 小区段中的无线局域网的标识符被发送到小区段中的至少一个移动台，使得至少一个移动站能切换到无线局域网。 可选地，可以将识别小区段和无线局域网的地理边界的信息发送到至少一个移动站。

公开(公告)号：US20150045057A1

公开(公告)日：2015-02-12

申请号：US14509379

申请日：2014-10-08

Applicant: Apple Inc.

Inventor： Lai King Tee ,  Geng Wu ,  Jun Li ,  Yuqiang Tang ,  Neng Wang ,  Hua Xu ,  Jianglei Ma

IPC: G01S5/10 ,  H04W4/02

CPC classification number: G01S5/10 ,  H04L5/0007 ,  H04W4/02 ,  H04W24/10 ,  H04W64/00

Abstract: Neighbor cell hearability can be improved by including an additional reference signal that can be detected at a low sensitivity and a low signal-to-noise ratio, by introducing non-unity frequency reuse for the signals used for a time difference of arrival (TDOA) measurement, e.g., orthogonality of signals transmitted from the serving cell sites and the various neighbor cell sites. The new reference signal, called the TDOA-RS, is proposed to improve the hearability of neighbor cells in a cellular network that deploys 3GPP EUTRAN (LTE) system, and the TDOA-RS can be transmitted in any resource blocks (RB) for PDSCH and/or MBSFN subframe, regardless of whether the latter is on a carrier supporting both PMCH and PDSCH or not. Besides the additional TDOA-RS reference signal, an additional synchronization signal (TDOA-sync) may also be included to improve the hearability of neighbor cells.

Abstract translation: 通过对于用于到达时差（TDOA）的信号引入非单位频率重用，可以通过包括可以在低灵敏度和低信噪比下检测的附加参考信号来提高邻近小区的可听性， 测量，例如从服务小区站点和各个相邻小区站点发送的信号的正交性。 提出了称为TDOA-RS的新参考信号，以提高部署3GPP EUTRAN（LTE）系统的蜂窝网络中的相邻小区的可听性，并且可以在用于PDSCH的任何资源块（RB）中发送TDOA-RS 和/或MBSFN子帧，而不管后者是否在支持PMCH和PDSCH两者的载波上。 除了附加的TDOA-RS参考信号之外，还可以包括附加同步信号（TDOA-sync）以提高相邻小区的可听性。