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    • 2. 发明申请
    • SCHEDULING WDM PON WITH TUNABLE LASERS WITH DIFFERENT TUNING TIMES
    • 使用具有不同调谐时间的可变激光器调度WDM PON
    • WO2011019992A1
    • 2011-02-17
    • PCT/US2010/045436
    • 2010-08-13
    • NEW JERSEY INSTITUTE OF TECHNOLOGYANSARI, NirwanZHANG, Jingjing
    • ANSARI, NirwanZHANG, Jingjing
    • H04B10/12H04J14/02
    • H04J14/0282
    • Technologies are generally described for network traffic scheduling in a wavelength division multiplexing (WDM) passive optical network (PON). Dynamic wavelength assignment and time allocation in hybrid WDM/TDM PONs with tunable lasers as optical light generators is accomplished by mapping the scheduling into a multi-processor scheduling problem with wavelength channels as machines and ONU requests as jobs. Wavelengths may be considered as parallel identical machines. Taking laser tuning time into consideration preemptive and non-preemptive scheduling with the objective of minimizing the latest job completion time is computed employing a number of heuristic algorithms. The algorithms compute two extreme cases of zero and infinity laser tuning time, respectively. Using the results from these two extreme cases, the heuristic scheduling schemes for the case of arbitrary laser tuning time yield close average latest job completion times for both schedule types.
    • 波分复用(WDM)无源光网络(PON)中的网络流量调度通常被描述。 通过将可调激光器作为光发生器的混合WDM / TDM PON中的动态波长分配和时间分配通过将作为机器和ONU请求的波长信道的调度映射到波长信道的多处理器调度问题中来实现。 波长可以被认为是平行相同的机器。 将激光调谐时间考虑在抢先和非抢占式调度中,以最小化最新作业完成时间为目标,采用多种启发式算法进行计算。 算法分别计算了零和无限激光调谐时间的两个极端情况。 使用这两种极端情况下的结果,针对任意激光调谐时间的启发式调度方案可以得到两种计划类型的近似平均最近的作业完成时间。