Method and system for allocating bandwith to real-time variable bit rate (rt-VBR) traffic
AssigneeFujitsu Network Communications, Inc.
InventorGuoliang Wu
Life of this patent
Estimating the term…
Abstract
A method for allocating transmission bandwidth to a group of real-time variable bit rate connections includes determining an acceptable cell loss probability for a real-time variable bit rate group based on quality of service requirements for real-time variable bit rate connections in the real-time variable bit rate group. An allocation bandwidth is determined for the real-time variable bit rate group from a probability density function of an aggregate cell arrival rate for the real-time variable bit rate group. The allocation bandwidth is the bandwidth that the probability of the aggregate cell arrival rate exceeding the bandwidth is less than or at least substantially equal to the acceptable cell loss probability.
Claims26
A method for allocating transmission bandwidth to a group of real-time variable bit rate connections, comprising:
- determining an acceptable cell loss probability for said group of real-time variable bit rate connections based on quality of service requirements for real-time variable bit rate connections in said group of real-time variable bit rate connections;
- determining an allocation bandwidth for said group of real-time variable bit rate connections from a probability density function of an unweighted sum of individual cell arrival rates for said group of real-time variable bit rate connections, the allocation bandwidth comprising a bandwidth at which the probability of the unweighted sum of individual cell arrival rates exceeding the bandwidth is less than or at least substantially equal to the acceptable cell loss probability;
- and
- allocating the allocation bandwidth for transmission of said group of real-time variable bit rate connections.
A method for determining whether a real-time variable bit rate connection can be accepted by a network element in a telecommunications network, comprising:
- receiving a request for supporting a new real-time variable bit rate connection, the request including quality of service requirements for the new real-time variable bit rate connection;
- determining an acceptable cell loss probability based on quality of service requirements for a real-time variable bit rate group of connections comprising the new real-time variable bit rate connection and existing real-time variable bit rate connections;
- determining an allocation bandwidth for the real-time variable bit rate group of connections from a probability density function of an unweighted sum of individual cell arrival rates for the real-time variable bit rate group of connections, the allocation bandwidth comprising a bandwidth at which the probability of the unweighted sum of individual cell arrival rates exceeding the bandwidth is less than or at least substantially equal to the acceptable cell loss probability;
- and
- accepting the new real-time variable bit rate connection at the network element in response to determining the allocation bandwidth is available for allocation at the network element.
A bandwidth allocation system for use in a network element, comprising:
- a computer-readable medium;
- and
- a real-time variable bit rate allocation system stored on the computer-readable medium, the real-time variable bit rate allocation system operable to determine an acceptable cell loss probability for a real-time variable bit rate group of connections based on quality of service requirements for real-time variable bit rate connections in the real-time variable bit rate group of connections, to determine an allocation bandwidth for the real-time variable bit rate group of connections from a probability density function of an unweighted sum of individual cell arrival rates for the real-time variable bit rate group of connections, the allocation bandwidth comprising a bandwidth at which the probability of the unweighted sum of individual cell arrival rates exceeding the bandwidth is less than or at least substantially equal to the acceptable cell loss probability.
Dependencies are inferred from the claim text.