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Reference Architecture +--------+ | Policy | | Server | +--------+ | | +-----+ +-----+ +--------+ +-----+ +----------+ | CPE |---| HGW |---| | | | | | +-----+ +-----+ | Access | +---------+ | | | Regional | | Node |---| Aggreg. |---| NAS |---| Network | +-----+ +-----+ | | | Node | | | | | | CPE |---| HGW |---| | +---------+ | | | | +-----+ +-----+ +--------+ +-----+ +----------+ Information Reports --------------------------> Control Requests <-------------------------- Control Responses --------------------------> Access Node Control Mechanism <-------------------------> PPP, DHCP, IP <---------><-------------------------------------> |