公开(公告)号：US09825753B2

公开(公告)日：2017-11-21

申请号：US14881613

申请日：2015-10-13

Applicant: AT&T Intellectual Property I, L.P.

Inventor： Rittwik Jana ,  Vaneet Aggarwal ,  Christopher W. Rice ,  Nemmara K. Shankaranarayanan ,  Melissa Duarte ,  Ashutosh Sabharwal

IPC: H04L5/14 ,  H04L27/26 ,  H04B15/00

CPC classification number: H04L5/1461 ,  H04B15/00 ,  H04L5/14 ,  H04L5/143 ,  H04L27/265

Abstract: Disclosed herein are systems, methods, and computer-readable storage media for enabling improved cancellation of self-interference in full-duplex communications, or the transmitting and receiving of communications in a single frequency band without requiring time, frequency, or code divisions. The system estimates the signal strength and phase of a self-interference signal, generates a cancellation signal based on this estimate, then uses the cancellation signal to suppress the self-interference before sampling received analog signal. After applying the cancellation signal, the system samples and digitizes the remaining analog signal. The digitized signal is then subjected to additional digital cancellation, allowing for extraction of the desired signal.

公开(公告)号：US20170093553A1

公开(公告)日：2017-03-30

申请号：US15374502

申请日：2016-12-09

Applicant: AT&T Intellectual Property I, L.P.

Inventor： Vaneet Aggarwal ,  Rittwik Jana ,  Christopher W. Rice ,  Nemmara K. Shankaranarayanan

IPC: H04L5/14 ,  H04W28/18 ,  H04L5/00

CPC classification number: H04L5/14 ,  H04L1/1832 ,  H04L1/1854 ,  H04L5/0055 ,  H04L47/27 ,  H04W28/18

Abstract: A system and method for establishing windows that govern the exchange of acknowledgements in a full-duplex communication. The window is established for two nodes which transmit asymmetric frame sizes in full-duplex mode. The window is related to the size of the asymmetric frames. Frames are exchanged in full-duplex between the two nodes, and the window size is defined as enabling the nodes to send data until the number of unacknowledged frames at the nodes is less than or equal to the window size, at which point acknowledgments are exchanged simultaneously. In sending the acknowledgment, both nodes can send acknowledgments simultaneously in full-duplex in the same frequency bin.

公开(公告)号：US09553958B2

公开(公告)日：2017-01-24

申请号：US15049560

申请日：2016-02-22

Applicant: AT&T Intellectual Property I, L.P.

Inventor： Vaneet Aggarwal ,  Rittwik Jana ,  Christopher W. Rice ,  Nemmara K. Shankaranarayanan

IPC: H04B7/005 ,  H04L29/06 ,  H04W74/08 ,  H04L5/14 ,  H04W72/00 ,  H04W84/12

CPC classification number: H04L5/14 ,  H04L69/28 ,  H04W72/00 ,  H04W72/0446 ,  H04W74/08 ,  H04W84/12

Abstract: A system, method, and computer-readable storage media for reducing monopolization of a frequency channel during full-duplex communications. The MAC layer of governing communications can be modified to reduce likelihood of monopolization by (1) in networks which are exclusively filled with full-duplex devices, configuring non-communicating devices to ignore data collisions of communicating devices, requiring the communicating devices to wait for an standard backoff time after the data transmission is complete; and/or (2) in mixed half-duplex/full-duplex networks, requiring a half-duplex nodes and/or a full-duplex node to wait an extended duration after the data transmission is complete, while the non-communicating devices do not wait an extended duration.

Abstract translation: 一种用于在全双工通信期间减少频道的垄断的系统，方法和计算机可读存储介质。 可以修改控制通信的MAC层，以通过（1）在专门填充全双工设备的网络中减少垄断的可能性，将非通信设备配置为忽略通信设备的数据冲突，要求通信设备等待 数据传输完成后的标准退避时间; 和/或（2）在混合半双工/全双工网络中，要求半双工节点和/或全双工节点在数据传输完成之后等待一段延长的持续时间，而非通信设备 不等待延长的时间。

公开(公告)号：US09319207B2

公开(公告)日：2016-04-19

申请号：US13685121

申请日：2012-11-26

Applicant: AT&T Intellectual Property I, L.P.

Inventor： Vaneet Aggarwal ,  Rittwik Jana ,  Christopher W. Rice ,  Nemmara K. Shankaranarayanan

IPC: H04L5/14

CPC classification number: H04L5/14 ,  H04L1/1832 ,  H04L1/1854 ,  H04L5/0055 ,  H04L47/27 ,  H04W28/18

Abstract: A system and method for establishing windows that govern the exchange of acknowledgements in a full-duplex communication. The window is established for two nodes which transmit asymmetric frame sizes in full-duplex mode. The window is related to the size of the asymmetric frames. Frames are exchanged in full-duplex between the two nodes, and the window size is defined as enabling the nodes to send data until the number of unacknowledged frames at the nodes is less than or equal to the window size, at which point acknowledgments are exchanged simultaneously. In sending the acknowledgment, both nodes can send acknowledgments simultaneously in full-duplex in the same frequency bin.

Abstract translation: 一种用于建立控制全双工通信中的确认交换的窗口的系统和方法。 为全双工模式传输非对称帧大小的两个节点建立该窗口。 窗口与非对称帧的大小有关。 帧在两个节点之间以全双工方式交换，并且窗口大小被定义为使得节点能够发送数据，直到节点处的未确认帧的数量小于或等于窗口大小，此时确认确认被交换 同时。 在发送确认时，两个节点可以在相同频率仓中全双工发送确认。

公开(公告)号：US20150092769A1

公开(公告)日：2015-04-02

申请号：US14568144

申请日：2014-12-12

Applicant: AT&T Intellectual Property I, L.P.

Inventor： Rittwik Jana ,  John F. Murray ,  Christopher W. Rice ,  Ron Shacham

IPC: H04L29/06

CPC classification number: H04L65/1069 ,  H04L12/66

Abstract: An Internet protocol Multimedia Subsystem (IMS) gateway application server includes an originating application server module adapted to invoke call control services in response to requests initiated by a voice over Internet Protocol (IP) (VoIP) client associated with a communication device such as an IP telephone. Disclosed gateway application servers include a proxy server module adapted to notify the communication client of session control messages intended for the communication device.

Abstract translation: 互联网协议多媒体子系统（IMS）网关应用服务器包括适于响应于与诸如IP之类的通信设备相关联的由因特网协议（IP）（VoIP）客户端发起的请求来调用呼叫控制服务的始发应用服务器模块 电话。 公开的网关应用服务器包括适于向通信客户端通知预期用于通信设备的会话控制消息的代理服务器模块。

公开(公告)号：US20130259032A1

公开(公告)日：2013-10-03

申请号：US13901609

申请日：2013-05-24

Applicant: AT&T Intellectual Property I, L.P.

Inventor： Rittwik Jana ,  John F. Murray ,  Christopher W. Rice ,  Ron Shacham

IPC: H04L29/06

CPC classification number: H04L65/1069 ,  H04L12/66

Abstract: An Internet protocol Multimedia Subsystem (IMS) gateway application server includes an originating application server module adapted to invoke call control services in response to requests initiated by a voice over Internet Protocol (IP) (VoIP) client associated with a communication device such as an IP telephone. Disclosed gateway application servers include a proxy server module adapted to notify the communication client of session control messages intended for the communication device.

Abstract translation: 互联网协议多媒体子系统（IMS）网关应用服务器包括适于响应于与诸如IP之类的通信设备相关联的由因特网协议（IP）（VoIP）客户端发起的请求来调用呼叫控制服务的始发应用服务器模块 电话。 公开的网关应用服务器包括适于向通信客户端通知预期用于通信设备的会话控制消息的代理服务器模块。