公开(公告)号：US20150271649A1

公开(公告)日：2015-09-24

申请号：US14218299

申请日：2014-03-18

Applicant: MOTOROLA SOLUTIONS, INC.

Inventor： CHI TU TRAN ,  DAVID E. KLEIN ,  DAVID J. LEY

IPC: H04W4/10 ,  H04W68/12 ,  H04L5/16

CPC classification number: H04W4/10 ,  H04L5/0005 ,  H04L5/16 ,  H04L5/18

Abstract: A method and apparatus for a back channel implemented by a transmitting device in a half-duplex communication system includes monitoring for voice activity detection, indicative of an absence of human speech, while the transmitting device is transmitting on a half-duplex channel of the half-duplex communication system; transmitting a notification of a back channel opportunity to other devices on the half-duplex channel responsive to the voice activity detection; and switching to a receiving mode to receive data on the back channel while still maintaining control of the half-duplex channel. A method for a back channel implemented by a receiving device is also described.

Abstract translation: 由半双工通信系统中的发送设备实现的用于后向信道的方法和装置包括监视语音活动检测，指示不存在人类语音，而发送设备正在半双工通信的半双工信道上发送 双向通信系统; 响应于语音活动检测，将半通道机会的通知发送到半双工通道上的其他设备; 并切换到接收模式，以在仍然保持半双工信道的控制的同时在后向信道上接收数据。 还描述了由接收装置实现的后向信道的方法。