HQoS

HQoS (Hierarchical Quality of Service) allows the carrier to make sure each service gets the network resources.
HQoS is a tiered quality of service technology that classifies and schedules traffic based on service type and/or COS (Class of Service).

Classical QoS examines the packet puts it into a queue and runs a scheduling method – strict priority, weighted round robin or other technology.  It is limited to 8 queues and 1 level of scheduling and priority.

HQoS on the other hand can have 2 to 4 levels of scheduling and prioritization This means that you can look at each service individually for each customer.  While you may have only one big pipe for services, you can give the customer smaller pipes each one for a different application, each one with its own prioritization requirements, each one with its own quality of service policy.