A resource and admission control subsystem in a next generation network (NGN), comprising:
- an Access Admission Control Function (A-ACF), configured to receive a first resource reservation request from an application service media flow for a transport layer of the NGN, perform an authentication and make a first admission control decision for the first resource reservation request based on a user profile, operation policy rules, and a transport resource availability, and control an Access Border Gateway Function (A-BGF) at a border between an access network of the NGN and a core network of the NGN in accordance with a result of the first admission control decision;
- an Interconnection Admission Control Function (I-ACF), configured to receive a second resource reservation request from a cross-operator application service media flow for the transport layer of the NGN, perform an authentication and make a second admission control decision for the second resource reservation request based on the user profile, the operation policy rules, and the transport resource availability, and control an Interconnection Border Gateway Function (I-BGF) at a border between the access network and the core network of the NGN in accordance with a result of the second admission control decision;
- a Resource Control Function in access network (A-RCF), configured to check the transport resource availability in accordance with a first transport resource availability check request from the A-ACF, perform checking and resource allocation on the basis of a resource status database, update the resource allocation status, and return a first check result of the transport resource availability;
- a Resource Control Function in core network (C-RCF), configured to check the transport resource availability in accordance with a second transport resource availability check request from the A-ACF or the I-ACF, perform checking and resource allocation on the basis of the resource status database, update the resource allocation status, and return a second check result of the transport resource availability;
- a Gq interface;
- a Go interface;
- an Id interface;
- and
- a G3 interface;
- wherein an application service control function in a NGN application service subsystem interacts with the A-ACF via the Gq interface, in order to send resource reservation requirements of the application service media flow for the transport layer to the A-ACF through the first resource reservation request;
- wherein the A-ACF controls the A-BGF at the border between the access network and the core network via the Go interface, in accordance with the result of the first admission control decision, to perform the functions of:
- gate opening or closing, wherein the gate indicates a packet filtering by IP address/port, packet marking for outbound traffic, bandwidth reservation and allocation for inbound/outbound traffic, IP address and port translation, policing of inbound traffic, packet filtering-based firewall, and measurement of usage, for the application service media flow;
- wherein an interconnection border control function (I-BCF) interacts with the I-ACF via the Id interface, in order to send the resource reservation requirements of the cross-operator application service media flow for the transport layer to the I-ACF through the second resource reservation request;
- wherein the I-ACF controls an Interconnection Border Gateway Function (I-BGF) at the border between the two core networks via the G3 interface, in accordance with the result of the second admission control decision, to perform the functions of gate opening or closing, packet marking for outbound traffic, bandwidth reservation and allocation for inbound/outbound traffic, IP address and port translation, policing of inbound traffic, packet filtering-based firewall, and measurement of usage, for the cross-operator application service media flow,
- and wherein the A-ACF, I-ACF, A-RCF and C-RCF are logical functional entities, which are separate physical devices or functional modules integrated in other physical devices.