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1. 发明授权

US11558913B2 Method and system for initial synchronization and collision avoidance in device to device communications without network coverage 有权
公开(公告)号：US11558913B2
公开(公告)日：2023-01-17
申请号：US17146175
申请日：2021-01-11
申请人： BlackBerry Limited
发明人： Nam Nguyen , Yufei Wu Blankenship , Sagar Dhakal
IPC分类号： H04W76/14 , H04B7/26 , H04W4/70 , H04W74/08 , H04W56/00 , H04W72/04 , H04W8/00 , H04W72/02
摘要： A method at a first device for enabling a device-to-device wireless link, the method detecting whether a presence signal of a second device is received over a first time period, the presence signal of the second device having a time-slot boundary; and if the presence signal of the second device is not detected, initiating a time-slot boundary by the first device including: transmitting a first presence signal of the first device in a selected time-slot; and checking for an acknowledgment to the first presence signal.

2. 发明授权

US10932309B2 Method and system for initial synchronization and collision avoidance in device to device communications without network coverage 有权
公开(公告)号：US10932309B2
公开(公告)日：2021-02-23
申请号：US16219734
申请日：2018-12-13
申请人： BlackBerry Limited
发明人： Nam Nguyen , Yufei Wu Blankenship , Sagar Dhakal
IPC分类号： H04W76/14 , H04W4/70 , H04W72/04 , H04W8/00 , H04W56/00 , H04B7/26 , H04W72/02 , H04W74/08
摘要： A method at a first device for enabling a device-to-device wireless link, the method detecting whether a presence signal of a second device is received over a first time period, the presence signal of the second device having a time-slot boundary; and if the presence signal of the second device is not detected, initiating a time-slot boundary by the first device including: transmitting a first presence signal of the first device in a selected time-slot; and checking for an acknowledgment to the first presence signal.

3. 发明申请

US20160344539A1 APPARATUS AND ASSOCIATED METHOD FOR PROVIDING COMMUNICATION BANDWIDTH IN COMMUNICATION SYSTEM 有权
公开(公告)号：US20160344539A1
公开(公告)日：2016-11-24
申请号：US15167594
申请日：2016-05-27
申请人： BlackBerry Limited
发明人： Thomas Sexton , Sagar Dhakal , Paul James Lusina
IPC分类号： H04L7/04 , H04L5/00 , H04W52/38
CPC分类号： H04L7/04 , H04L5/0048 , H04W52/386 , Y02B70/30
摘要： An apparatus and an associated method selects rates at which received signals are sampled in a multi-user communication system. The signals are sampled at initial sampling rates during a first period. An estimate is made of the number of received signals, and selection is made of an updated sampling rate, based in part upon the estimate.

4. 发明申请

US20150043541A1 METHOD AND SYSTEM FOR INITIAL SYNCHRONIZATION AND COLLISION AVOIDANCE IN DEVICE TO DEVICE COMMUNICATIONS WITHOUT NETWORK COVERAGE 有权
标题翻译：无网络覆盖的设备通信中的初始同步和冲突避免的方法和系统
公开(公告)号：US20150043541A1
公开(公告)日：2015-02-12
申请号：US13962708
申请日：2013-08-08
申请人： BlackBerry Limited
发明人： Yufei Wu Blankenship , Sagar Dhakal , Nam Nguyen
IPC分类号： H04W72/02 , H04W4/00
CPC分类号： H04W76/14 , H04B7/2656 , H04W4/70 , H04W8/005 , H04W56/00 , H04W72/02 , H04W72/0446 , H04W74/085
摘要： A method at a first device for enabling a device-to-device wireless link, the method detecting whether a presence signal of a second device is received over a first time period, the presence signal of the second device having a time-slot boundary; and if the presence signal of the second device is not detected, initiating a time-slot boundary by the first device including: transmitting a first presence signal of the first device in a selected time-slot; and checking for an acknowledgment to the first presence signal.
摘要翻译：一种用于启用设备到设备无线链路的第一设备的方法，所述方法检测在第一时间段内是否接收到第二设备的存在信号，所述第二设备的存在信号具有时隙边界; 并且如果未检测到所述第二设备的存在信号，则由所述第一设备发起时隙边界，包括：在所选择的时隙中发送所述第一设备的第一存在信号; 并检查对第一存在信号的确认。

5. 发明授权

US10172176B2 Method and system for initial synchronization and collision avoidance in device to device communications without network coverage 有权
公开(公告)号：US10172176B2
公开(公告)日：2019-01-01
申请号：US15672600
申请日：2017-08-09
申请人： BlackBerry Limited
发明人： Nam Nguyen , Yufei Wu Blankenship , Sagar Dhakal
IPC分类号： H04W76/14 , H04W4/70 , H04W72/04 , H04W8/00 , H04W56/00 , H04W74/08 , H04W72/02 , H04B7/26
摘要： A method at a first device for enabling a device-to-device wireless link, the method detecting whether a presence signal of a second device is received over a first time period, the presence signal of the second device having a time-slot boundary; and if the presence signal of the second device is not detected, initiating a time-slot boundary by the first device including: transmitting a first presence signal of the first device in a selected time-slot; and checking for an acknowledgment to the first presence signal.

6. 发明授权

US09775187B2 Method and system for initial synchronization and collision avoidance in device to device communications without network coverage 有权
公开(公告)号：US09775187B2
公开(公告)日：2017-09-26
申请号：US15204588
申请日：2016-07-07
申请人： BlackBerry Limited
发明人： Nam Nguyen , Yufei Wu Blankenship , Sagar Dhakal
IPC分类号： H04W76/02 , H04W4/00 , H04W56/00 , H04W72/02 , H04W74/08 , H04B7/26 , H04W8/00 , H04W72/04
CPC分类号： H04W76/14 , H04B7/2656 , H04W4/70 , H04W8/005 , H04W56/00 , H04W72/02 , H04W72/0446 , H04W74/085
摘要： A method at a first device for enabling a device-to-device wireless link, the method detecting whether a presence signal of a second device is received over a first time period, the presence signal of the second device having a time-slot boundary; and if the presence signal of the second device is not detected, initiating a time-slot boundary by the first device including: transmitting a first presence signal of the first device in a selected time-slot; and checking for an acknowledgment to the first presence signal.

7. 发明申请

US20160323924A1 Method and System for Initial Synchronization and Collision Avoidance in Device to Device Communications Without Network Coverage 有权
标题翻译：无网络覆盖的设备到设备通信的初始同步和冲突避免的方法和系统
公开(公告)号：US20160323924A1
公开(公告)日：2016-11-03
申请号：US15204588
申请日：2016-07-07
申请人： BlackBerry Limited
发明人： Nam NGUYEN , Yufei Wu BLANKENSHIP , Sagar Dhakal
IPC分类号： H04W76/02 , H04W8/00 , H04W72/04
CPC分类号： H04W76/14 , H04B7/2656 , H04W4/70 , H04W8/005 , H04W56/00 , H04W72/02 , H04W72/0446 , H04W74/085
摘要： A method at a first device for enabling a device-to-device wireless link, the method detecting whether a presence signal of a second device is received over a first time period, the presence signal of the second device having a time-slot boundary; and if the presence signal of the second device is not detected, initiating a time-slot boundary by the first device including: transmitting a first presence signal of the first device in a selected time-slot; and checking for an acknowledgment to the first presence signal.
摘要翻译：一种用于启用设备到设备无线链路的第一设备的方法，所述方法检测在第一时间段内是否接收到第二设备的存在信号，所述第二设备的存在信号具有时隙边界; 并且如果未检测到所述第二设备的存在信号，则由所述第一设备发起时隙边界，包括：在所选择的时隙中发送所述第一设备的第一存在信号; 并检查对第一存在信号的确认。

8. 发明授权

US09094862B2 Adaptive pilot placement for estimation of vehicle-to-vehicle wireless channel 有权
标题翻译：用于估计车对无线信道的自适应导频放置
公开(公告)号：US09094862B2
公开(公告)日：2015-07-28
申请号：US13800423
申请日：2013-03-13
申请人： BlackBerry Limited
发明人： Sagar Dhakal , Nam Nguyen , James Earl Womack
IPC分类号： H04L12/26 , H04W28/06 , H04L5/00 , H04W24/08
CPC分类号： H04W28/06 , H04L5/0048 , H04L5/0069 , H04W24/08
摘要： A system and method that may facilitate transmission bandwidth savings in non-stationary vehicle-to-vehicle wireless communication channels. At a transmitting vehicle, a transmitter may adaptively change the number of pilot symbols or pilot rate within a frame based upon the current channel statistics. The transmitter may utilize a look-up table approach to select a best pilot rate based upon current conditions associated with the transmitting vehicle, and/or a new frame structure to transmit pilot rate information. At the receiving vehicle, the receiver may be configured to detect a unique waveform transmitted by the transmitting vehicle to estimate the pilot rate information. Alternatively, the receiver on the receiving vehicle may be configured to predict and verify the pilot rate information from an encoded data symbol embedded within a frame transmitted by the transmitting vehicle, which may entail a detection algorithm using encoded data symbols and/or an estimation algorithm using channel statistics.
摘要翻译：可以促进非固定车对无线通信信道中的传输带宽节省的系统和方法。在发送车辆上，发射机可以基于当前信道统计自适应地改变一帧内的导频符号或导频频率的数量。发射机可以利用查找表方法来选择基于与发射车辆相关联的当前条件的最佳导频，和/或用于发送导频速率信息的新帧结构。在接收车辆中，接收机可以被配置为检测由发送车辆发送的唯一波形以估计导频信息。或者，接收车辆上的接收机可以被配置为从嵌入在由发送车辆发送的帧内的编码数据符号预测和验证导频信息，其可能需要使用编码数据符号的检测算法和/或估计算法使用渠道统计。

9. 发明授权

US09871650B2 Apparatus and associated method for providing communication bandwidth in communication system 有权
公开(公告)号：US09871650B2
公开(公告)日：2018-01-16
申请号：US15167594
申请日：2016-05-27
申请人： BlackBerry Limited
发明人： Thomas Sexton , Sagar Dhakal , Paul James Lusina
IPC分类号： H04L12/26 , H04L7/04 , H04W52/38 , H04L5/00
CPC分类号： H04L7/04 , H04L5/0048 , H04W52/386 , Y02B70/30
摘要： An apparatus and an associated method selects rates at which received signals are sampled in a multi-user communication system. The signals are sampled at initial sampling rates during a first period. An estimate is made of the number of received signals, and selection is made of an updated sampling rate, based in part upon the estimate.

10. 发明申请

US20150365918A1 METHOD AND SYSTEM FOR INITIAL SYNCHRONIZATION AND COLLISION AVOIDANCE IN DEVICE TO DEVICE COMMUNICATIONS WITHOUT NETWORK COVERAGE 有权
公开(公告)号：US20150365918A1
公开(公告)日：2015-12-17
申请号：US14833992
申请日：2015-08-24
申请人： BlackBerry Limited
发明人： Yufei Wu Blankenship , Sagar Dhakal , Nam Nguyen
IPC分类号： H04W72/02 , H04W56/00 , H04W76/02 , H04W4/00 , H04W74/08
CPC分类号： H04W76/14 , H04B7/2656 , H04W4/70 , H04W8/005 , H04W56/00 , H04W72/02 , H04W72/0446 , H04W74/085
摘要： A method at a first device for enabling a device-to-device wireless link, the method detecting whether a presence signal of a second device is received over a first time period, the presence signal of the second device having a time-slot boundary; and if the presence signal of the second device is not detected, initiating a time-slot boundary by the first device including: transmitting a first presence signal of the first device in a selected time-slot; and checking for an acknowledgment to the first presence signal.

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