公开(公告)号：EP3503425B1

公开(公告)日：2020-02-19

申请号：EP18197167.2

申请日：2009-02-27

申请人： Apple Inc.

发明人： SIVANESAN, Kathiravetpillai ,  ZHU, Peiying ,  KIM, Sang-Youb ,  TEE, Lai King ,  XIAO, Junfeng

IPC分类号： H04B7/04 ,  H04B7/26 ,  H04B7/06 ,  H04B7/0417 ,  H04B7/0456 ,  H04W72/06

公开(公告)号：EP3334226B1

公开(公告)日：2020-03-25

申请号：EP18152994.2

申请日：2010-02-05

申请人： Apple Inc.

发明人： TEE, Lai King ,  WU, Geng ,  LI, Jun ,  TANG, Yuqiang ,  WANG, Neng ,  XU, Hua ,  MA, Jianglei

IPC分类号： H04W64/00 ,  H04W24/10

公开(公告)号：EP3334226A1

公开(公告)日：2018-06-13

申请号：EP18152994.2

申请日：2010-02-05

申请人： Apple Inc.

发明人： TEE, Lai King ,  WU, Geng ,  LI, Jun ,  TANG, Yuqiang ,  WANG, Neng ,  XU, Hua ,  MA, Jianglei

IPC分类号： H04W64/00

摘要： 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.

公开(公告)号：EP3334057A1

公开(公告)日：2018-06-13

申请号：EP18154699.5

申请日：2009-04-28

申请人： Apple Inc.

发明人： TEE, Lai King ,  SONG, Yi ,  WANG, Neng

IPC分类号： H04B7/0456 ,  H04B7/06 ,  H04B7/0452 ,  H04B7/04

CPC分类号： H04B7/0456 ,  H04B7/0452 ,  H04B7/0465 ,  H04B7/0469 ,  H04B7/0478 ,  H04B7/0639 ,  H04B7/0695 ,  H04L25/03828

摘要： The present invention provides for an improved application of signal strength weightings in a SDMA sectorized cellular network. The improved signal strength weightings application is conducted through the improved selection of weightings from a new codebook subset or by the selection of weightings from a larger codebook subset. In a further embodiment, an antenna beam index or bit map can be used to select the best beam(s) in a SDMA sectorized cellular network. In another embodiment, a field or factor in an uplink or downlink transmission packet can designate which directional transmission beam is best suited for the transmission or when the directional transmission beam should be activated.

公开(公告)号：EP3503425A1

公开(公告)日：2019-06-26

申请号：EP18197167.2

申请日：2009-02-27

申请人： Apple Inc.

发明人： SIVANESAN, Kathiravetpillai ,  ZHU, Peiying ,  KIM, Sang-Youb ,  TEE, Lai King ,  XIAO, Junfeng

IPC分类号： H04B7/04 ,  H04B7/26 ,  H04B7/06 ,  H04B7/0417 ,  H04B7/0456 ,  H04W72/06

CPC分类号： H04B7/0417 ,  H04B7/0456 ,  H04B7/063 ,  H04B7/0632 ,  H04B7/0639 ,  H04L25/0204 ,  H04L25/03343 ,  H04L2025/03414 ,  H04L2025/03426 ,  H04L2025/03802 ,  H04W72/06

摘要： To perform wireless communications in a closed loop multiple input, multiple output (MIMO) system, a feedback data structure is communicated over a wireless channel between a first wireless node and a second wireless node, where the feedback data structure contains indicators identifying coding to be applied by the second wireless node on signaling communicated between the second wireless node and the first wireless node, where the information in the feedback data structure is based on wireless channel conditions detected at the first wireless node. The indicators identify different codings to be used for different corresponding bands in the wireless channel.