Generic cell rate algorithm
The generic cell rate algorithm (GCRA) is a leaky bucket-type scheduling algorithm for the network scheduler that is used in Asynchronous Transfer Mode (ATM) networks. It is used to measure the timing of cells on virtual channels (VCs) and or (VPs) against bandwidth and jitter limits contained in a traffic contract for the VC or VP to which the cells belong. Cells that do not conform to the limits given by the traffic contract may then be re-timed (delayed) in traffic shaping, or may be dropped (discarded) or reduced in priority (demoted) in traffic policing. Nonconforming cells that are reduced in priority may then be dropped, in preference to higher priority cells, by downstream components in the network that are experiencing congestion. Alternatively they may reach their destination (V
- Comment
- enThe generic cell rate algorithm (GCRA) is a leaky bucket-type scheduling algorithm for the network scheduler that is used in Asynchronous Transfer Mode (ATM) networks. It is used to measure the timing of cells on virtual channels (VCs) and or (VPs) against bandwidth and jitter limits contained in a traffic contract for the VC or VP to which the cells belong. Cells that do not conform to the limits given by the traffic contract may then be re-timed (delayed) in traffic shaping, or may be dropped (discarded) or reduced in priority (demoted) in traffic policing. Nonconforming cells that are reduced in priority may then be dropped, in preference to higher priority cells, by downstream components in the network that are experiencing congestion. Alternatively they may reach their destination (V
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- Has abstract
- enThe generic cell rate algorithm (GCRA) is a leaky bucket-type scheduling algorithm for the network scheduler that is used in Asynchronous Transfer Mode (ATM) networks. It is used to measure the timing of cells on virtual channels (VCs) and or (VPs) against bandwidth and jitter limits contained in a traffic contract for the VC or VP to which the cells belong. Cells that do not conform to the limits given by the traffic contract may then be re-timed (delayed) in traffic shaping, or may be dropped (discarded) or reduced in priority (demoted) in traffic policing. Nonconforming cells that are reduced in priority may then be dropped, in preference to higher priority cells, by downstream components in the network that are experiencing congestion. Alternatively they may reach their destination (VC or VP termination) if there is enough capacity for them, despite them being excess cells as far as the contract is concerned: see . The GCRA is given as the reference for checking the traffic on connections in the network, i.e. usage/network parameter control (UPC/NPC) at user–network interfaces (UNI) or inter-network interfaces or network-network interfaces (INI/NNI) . It is also given as the reference for the timing of cells transmitted (ATM PDU Data_Requests) onto an ATM network by a network interface card (NIC) in a host, i.e. on the user side of the UNI . This ensures that cells are not then discarded by UPC/NCP in the network, i.e. on the network side of the UNI. However, as the GCRA is only given as a reference, the network providers and users may use any other algorithm that gives the same result.
- Hypernym
- Algorithm
- Is primary topic of
- Generic cell rate algorithm
- Label
- enGeneric cell rate algorithm
- Link from a Wikipage to another Wikipage
- Asynchronous Transfer Mode
- ATM Forum
- Bandwidth (signal processing)
- Category:Networking algorithms
- Category:Network scheduling algorithms
- Category:Teletraffic
- Connection admission control
- File:Dual LBC.JPG
- File:GCRA.JPG
- File:Variable Bit Rate.JPG
- FPGA
- ITU-T
- Jitter
- Leaky bucket
- Network interface card
- Network scheduler
- Network-to-network interface
- Priority control
- Scheduling algorithm
- Token bucket
- Traffic contract
- Traffic Contract
- Traffic policing (communications)
- Traffic shaping
- UPC and NPC
- User–network interface
- Virtual circuit
- Virtual Paths
- SameAs
- 4kzCF
- Generic cell rate algorithm
- m.05gz7n
- Q5532665
- Subject
- Category:Networking algorithms
- Category:Network scheduling algorithms
- Category:Teletraffic
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- Generic cell rate algorithm?oldid=1013924784&ns=0
- WikiPageLength
- 13249
- Wikipage page ID
- 1616583
- Wikipage revision ID
- 1013924784
- WikiPageUsesTemplate
- Template:Reflist
