Method and system for resource admission control

摘要

A method and system for resource admission control are disclosed. During a resource request process in the scenario of customer roaming, a visited location PD-FE sends a modified QoS policy or acceptable QoS policy information to a home location PD-FE when it cannot accept a resource request sent by the home location PD-FE, and the home location PD-FE makes a resource policy decision again and requests resources again according to the modified QoS policy, or when the home location PD-FE receives the next service request, it makes a resource policy decision according to the QoS policy information acceptable to the visited location PD-FE and sends a resource request to the visited location PD-FE. Both resource requests in the two cases are made based on the resource condition of the visited location PD-FE, therefore the visited location PD-FE generally can accept the requests after receiving them, thereby improving the success possibility of resource requests.

主权项

1. A resource admission control system, including a home location Policy Decision Functional Entity (PD-FE) and a visited location PD-FE; the home location PD-FE further including an information collecting module, a policy decision module and a policy negotiating module, the visited location PD-FE further including an authorization checking module, a policy feedback module and a resource admission decision module,
each of the information collecting module, the policy decision module, and the policy negotiating module comprising a first computer processor and respective memory, the respective memory storing computer-readable instructions which when executed by the first computer processor implement functions of the said modules; each of the authorization checking module, the policy feedback module, and the resource admission decision module comprising a second computer processor and respective memory, the respective memory storing computer-readable instructions which when executed by the second computer processor implement functions of the said modules; wherein the information collecting module being used for receiving a service request message from a Service Control Functions (SCF) and acquiring customer subscription information and a local operator policy; the policy decision module being used for making an initial resource policy decision according to the service request message received by the information collecting module and the acquired customer subscription information and local operator policy, and sending via a transport layer the authorization checking module of the visited location PD-FE a resource request message in which a Quality of Service (QoS) policy is contained; the authorization checking module being used for carrying out an authorization check on the resource request message after receiving the resource request message from the policy decision module, sending via the transport layer a check failure message to the policy feedback module if the check is not passed, and sending via the transport layer a check success message to the resource admission decision module if the check is passed; the policy feedback module being used for feeding QoS policy information acceptable to the visited location PD-FE or a modified QoS policy via the transport layer back to the policy negotiating module of the home location PD-FE after receiving via the transport layer the check failure message from the authorization checking module; the policy negotiating module being used for receiving and processing the QoS policy information acceptable to the visited location PD-FE or the modified QoS policy which is fed back by the policy feedback module; -and the resource admission decision module being used for interacting with a visited location Transport Resource Control Functional Entity (TRC-FE) to make a resource admission decision after receiving the check success message, wherein the home location PD-FE is configured to store the QoS policy acceptable to the visited location PD-FE, such that upon receiving a further service request message from the SCF, the home location PD-FE performs the following: making a resource policy decision based on the stored QoS policy acceptable to the visited location PD-FE, the QoS policy acceptable to the visited location PD-FE being non-identical to the requested QoS policy; and sending a resource request message containing the QoS policy acceptable to the visited location PD-FE, to the visited location PD-FE; or if determining that no resource policy decision can be made to meet the stored QoS policy acceptable to the visited location PD-FE, directly sending a service request response message for rejecting the service request message to the SCF without interacting with the visited location PD-FE.