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    • 1. 发明授权
    • Frame relay access device and method for transporting SS7 information
between signaling points
    • 帧中继接入设备和信令点之间传输SS7信息的方法
    • US5974052A
    • 1999-10-26
    • US644264
    • 1996-05-10
    • Bruce E. JohnsonMichael J. MuellerCraig C. PedersenVirgil E. LongVenkataramaiah RavishankarJesse Sherwood
    • Bruce E. JohnsonMichael J. MuellerCraig C. PedersenVirgil E. LongVenkataramaiah RavishankarJesse Sherwood
    • H04L12/28H04L29/06H04Q3/00H04J3/16
    • H04Q3/0025H04L12/2854H04L29/06H04L69/04H04L63/0428H04L69/08
    • An enhanced frame relay access device (FRAD) capable of bidirectional interfacing between Signaling System No. 7 (SS7) protocol and Frame Relay protocol is utilized to economically transport SS7 signaling and link management information between SS7 networks via a Frame Relay protocol digital communications network. In an outgoing data transfer, the enhanced SS7 FRAD interface determines and eliminates redundant signaling unit information found in an SS7 data stream before packaging the essential information into a frame "payload" and introducing the frame into the Frame Relay network. For incoming data transfers, the SS7 FRAD extracts the frame payload data and regenerates the appropriate SS7 signaling units to maintain a continuous and synchronous data stream on the SS7 network. In the event communications with an SS7 facility is not possible (for example, an SS7 network or facility is down), the SS7 FRAD communicates its operational status to other SS7 FRADs by sending a proprietary coordination and status information frame across the Frame Relay network. A plurality of SS7 FRADs are configurable to provide multiple efficient links between different SS7 facilities over the Frame Relay network. In addition, each FRAD is individually customized to provide special functions such as encryption/decryption and data compression/decompression.
    • 利用能够在信令系统7(SS7)协议和帧中继协议之间进行双向接口的增强型帧中继接入设备(FRAD),经由帧中继协议数字通信网络在SS7网络之间经济地传输SS7信令和链路管理信息。 在传出数据传输中,增强型SS7 FRAD接口在将基本信息打包到帧“有效载荷”之前,确定并消除在SS7数据流中发现的冗余信令单元信息,并将帧引入帧中继网络。 对于传入数据传输,SS7 FRAD提取帧有效载荷数据,并重新生成相应的SS7信令单元,以在SS7网络上维持连续和同步的数据流。 在不能与SS7设施进行通信的情况下(例如,SS7网络或设备关闭),SS7 FRAD通过在帧中继网络上发送专有的协调和状态信息帧,将其运行状态与其他SS7 FRAD进行通信。 多个SS7 FRAD可配置为通过帧中继网络在不同SS7设施之间提供多个有效链路。 此外,每个FRAD被单独定制以提供特殊功能,例如加密/解密和数据压缩/解压缩。