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MPCP General Description

The Multi-Point Control Protocol (MPCP) defines a control mechanism facilitating communication between a Master unit and Slave units in a Point-to-Multi-Point (P2MP) network. Key functions include controlled network booting, bandwidth assignment, and efficient polling of end-stations. MPCP operates at the MAC Control layer, allowing real-time manipulation of operations. It introduces specific control messages like GATE and REGISTER for dynamic bandwidth allocation and optimization. Its design ensures scalability and extensibility, making it a vital protocol for high-performance data networks.

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MPCP General Description

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  1. MPCP General Description

  2. MPCP • The Multi-Point Control Protocol (MPCP) specifies a control mechanism between a Master unit and Slaves units connected through a Point-to-Multi-Point (P2MP) segment to allow efficient transmission of data • Functions performed are: • Controlled network boot process • Ranging • Bandwidth assignment to end-stations • Bandwidth polling from end-stations

  3. MAC Control • MPCP is implemented in MAC Control layer • Clause 31: “MAC Control provides for real-time control and manipulation of MAC sublayer operation” HIGHER LAYERS MAC CONTROL Client (Bridge Relay Entity, LLC, etc) MAC CONTROL OSI Data Link Layer MAC PHYSICAL LAYER

  4. MAC Control • New control messages are introduced: • assign and request bandwidth: • GATE • REPORT • control the boot process: • REGISTER_REQ • REGISTER • REGISTER_ACK

  5. Considerations for Optimization • MPCP provides ‘hooks’ for network resource optimization: • Ranging is performed to determine ONU distance, and reduce slack • Reporting of bandwidth requirements by ONUs for dynamic bandwidth allocation (DBA) • Optical parameters are negotiated to optimize performance, pending PMD specification • Others TBD…

  6. Scalability & Extensibility • Fast granting cycles possible • Dynamic granting capability allows fast bandwidth assignment • Protocol has ability to add future fields • Split ratio and reach not limited by MPCP

  7. Details in separate presentations… • Layering • Timing Model • Message Formats • ONU Auto-Discovery • Also includes P2PE initialization

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