-
公开(公告)号:US06765917B1
公开(公告)日:2004-07-20
申请号:US09324517
申请日:1999-06-03
申请人: Alan W. Jaakkola , Donna Godin , Brian Wirth
发明人: Alan W. Jaakkola , Donna Godin , Brian Wirth
IPC分类号: H04L1228
CPC分类号: H04Q11/0478 , H04J3/0647 , H04J3/0658 , H04L2012/5607 , H04L2012/5674
摘要: A system and method for the transmission of synchronization information from a wireless asynchronous transfer mode (ATM) base station across a point to point or point to multipoint wireless link, to one or more network interface units (NIUs). Each of the NIUs is capable of supporting a combination of structured or unstructured T1 and/or E1 circuit emulation services. The technique involves locking the wireless modem downstream symbol clock to an externally provided frequency reference from the base station. The reference is an N integer multiple of 8 kHz which is the lowest common denominator for both the T1 and E1 clocking rates.
摘要翻译: 一种用于将来自无线异步传输模式(ATM)基站的同步信息跨越点对点或点对多点无线链路传输到一个或多个网络接口单元(NIU)的系统和方法。 每个NIU能够支持结构化或非结构化T1和/或E1电路仿真服务的组合。 该技术涉及将无线调制解调器下行符号时钟锁定到来自基站的外部提供的频率参考。 参考是8 kHz的N整数倍,它是T1和E1时钟速率的最低公分母。
-
公开(公告)号:US06356537B1
公开(公告)日:2002-03-12
申请号:US09161435
申请日:1998-09-24
申请人: Al an Jaakkola , Donna Godin
发明人: Al an Jaakkola , Donna Godin
IPC分类号: H04L1226
CPC分类号: H04W88/08 , H04L12/5601 , H04L2012/5607
摘要: A radio interface card for use in a base station of a broadband wireless ATM system to support bi-directional communications with customer premise network interface units (NIUs) over a wireless link. The ATM radio interface card (ARIC) includes a modem for modulating data received from an ATM backbone connected to the base station into a point to multipoint format for transmission over the link to the NIUs. A demodulator in the ARIC supports a point to point protocol for processing digital communications received from distributed NIUs located within a geographic area.
摘要翻译: 一种在宽带无线ATM系统的基站中使用的无线接口卡,用于通过无线链路支持与客户驻地网络接口单元(NIU)的双向通信。 ATM无线电接口卡(ARIC)包括调制解调器,用于将从基站连接的ATM主干接收的数据调制成点到多点格式,以便通过到NIU的链路进行传输。 ARIC中的解调器支持用于处理从位于地理区域内的分布式NIU接收的数字通信的点对点协议。
-