| 摘要 |
PROBLEM TO BE SOLVED: To provide an IP platform for an advanced multipoint access system. SOLUTION: LMDS (local multipoint distribution services) systems use a communication network termination individual modulation/coding (physical layer) for downlink (DL) burst, DL bandwidth is continuously varying in time, and higher layer (IP) functions cannot perform service priority respecting traffic shaping. The invention proposes to combine both framing and IP layer functions to one inter-layer framer. The combination of both information ensures QoS provisioning in case of multi-modulation and multi-coding environment. A QoS queue server gets always informed on the actual amount of available data frame bits and decides on the next IP packet to transport on the basis of service priority aspects. As soon as a DL frame is filled, supposing that the maximum DL frame rate is always lower than internal processing in the inter-layer framer, the QoS server stops the data delivery. COPYRIGHT: (C)2003,JPO
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