发明名称 |
INTER-CLASS SCHEDULERS UTILIZING PRIORITY GUARANTEED QUEUING |
摘要 |
Inter-class schedulers for digital link systems provide high efficiency utilization of limited bandwidth by employing queuing techniques refereed to as Statistical Priority Guarantee Queuing (SPGQ) and Generic Cell-Rate Algorithm Priority Guarantee Queuing (GCRA-PGQ). SPGQ "elevates" the priority of otherwise low-priority classes under prescribed circumstances in accordance with a statistical process. The SPGQ scheduler determines whether a number within a range produced by a uniform random number generator lies within a sub-range proportional to the programmed statistical guarantee for a given class. If the number lies within the sub-range associated with a given class, then the priority of that class is elevated to a higher priority when both are eligible to transmit. The GCRA-PGQ scheduler operates as a strict priority mechanism until a class requires bandwidth in excess of a GCRA "window" or threshold for that class. When that occurs, the service priority of that class is temporarily lowered.
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申请公布号 |
CA2356278(C) |
申请公布日期 |
2004.03.16 |
申请号 |
CA19992356278 |
申请日期 |
1999.12.16 |
申请人 |
NORTEL NETWORKS LIMITED |
发明人 |
ST-DENIS, BERNARD;PILLAR, JOHN;MARCHAND, BERNARD |
分类号 |
H04L12/56;H04Q11/04;(IPC1-7):H04Q11/04 |
主分类号 |
H04L12/56 |
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