公开(公告)号：US20060212525A1

公开(公告)日：2006-09-21

申请号：US11341937

申请日：2006-01-26

申请人： Roozbeh Atarius ,  Ramachandran Subramanian

发明人： Roozbeh Atarius ,  Ramachandran Subramanian

IPC分类号： G06F15/16

CPC分类号： H04L65/4061 ,  H04L51/04 ,  H04L51/066 ,  H04L51/36 ,  H04L51/38 ,  H04L65/1016

摘要： A method and apparatus for interworking between push-to-talk over cellular (PoC) systems and instant messagaing (IM) systems is provided. An interworking entity that behaves like a PoC client to a PoC server and as an IM client to the IM server is provided. The interworking entity may be implemented as part of the PoC server or the IM server. The interworking entity listens to talk bursts from the PoC server and when it receives a talk burst the interworking entity sends the message to the IM client via the IM server. In an embodiment, the interworking entity listens to talk bursts or audio clips from the IM server and when it receives them, stores them in a temporary storage memory and converts them to a streaming format. The interworking entity then requests the floor from the PoC server, and, once the floor is granted, streams the stored audio clip or talk burst to the PoC server. The PoC server then distributes the clips to the PoC clients.

摘要翻译： 提供了一键通（PoC）系统和即时消息（IM）系统之间的互通方法和装置。 提供了一种与PoC服务器和作为IM服务器的IM客户端一样的PoC客户端的互通实体。 互通实体可以被实现为PoC服务器或IM服务器的一部分。 互通实体监听来自PoC服务器的通话突发，当接收到通话突发时，互通实体通过IM服务器向IM客户端发送消息。 在一个实施例中，互通实体监听来自IM服务器的通话突发或音频剪辑，并且当它接收到它们时，将它们存储在临时存储存储器中并将它们转换为流格式。 互通实体然后从PoC服务器请求楼层，并且一旦授权，则将存储的音频剪辑或通话突发流传输到PoC服务器。 PoC服务器然后将剪辑分发到PoC客户端。

公开(公告)号：US06606363B1

公开(公告)日：2003-08-12

申请号：US09473927

申请日：1999-12-28

申请人： Roozbeh Atarius ,  Rajaram Ramesh

发明人： Roozbeh Atarius ,  Rajaram Ramesh

IPC分类号： H04L704

CPC分类号： H04L27/0014 ,  H04L2027/0065 ,  H04L2027/0097

摘要： A method and apparatus estimate an offset between a carrier frequency of a transmitter and a local reference frequency of a receiver. A received signal is separated into frequency synchronization signals and data, and a determination is made whether the frequency synchronization signals are adequate for estimating the frequency offset. This determination may be made based on, e.g., an estimated Doppler spread, an estimated signal to noise ratio, and/or an available amount of frequency offset estimation time. The frequency offset is estimated based on the determination results. If the frequency synchronization signals are adequate for estimating the frequency offset, the frequency synchronization signals are used for determining the frequency offset. Otherwise, the rate of the frequency synchronization signals is increased, e.g., by using the data as frequency synchronization signals, in which case the data is combined with the frequency synchronization signals to determine the frequency offset.

摘要翻译： 方法和装置估计发射机的载波频率和接收机的本地参考频率之间的偏移。 将接收到的信号分离成频率同步信号和数据，并且确定频率同步信号是否足以估计频率偏移。 可以基于例如估计的多普勒扩展，估计的信噪比和/或可用的频率偏移估计时间量来进行该确定。 基于确定结果估计频率偏移。 如果频率同步信号足以估计频率偏移，则使用频率同步信号来确定频率偏移。 否则，例如通过使用数据作为频率同步信号来增加频率同步信号的速率，在这种情况下，数据与频率同步信号组合以确定频率偏移。