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2                                                 Transport aspects


            1.      US_TRAFFIC_TRIGR  (LinkState, QFUA)

            2.      DS_TRAFFIC_TRIGR (LinkState, QFDA)
            The trigger criteria for transitioning from a  higher rate (power) state to a  lower rate (power) state,  are
            based on the aggregate downstream queue arrival (QADA) and the upstream data stream metric (QAUA).
            The  LRCC-O  aggregates  the  QADA  and  QAUA  for  the  trigger  period  (TRIGR_PERIOD)  and  compares  with
            trigger  thresholds  (TRIGR_THRESH)  according  to  the  threshold  criteria  in  Table Z.11.  The  LRCC-O  shall
            request a transition from L0 to L2.1N or from L2.1B to L2.2 if and only if the related threshold criteria are
            met for both QADA and QAUA over a trigger persistency period (TRIGR_PERSIST).

            The trigger criteria for transitioning from a  lower rate (power) state to a  higher rate (power) state, are
            based on the aggregate downstream queue fill (QFDA) and the aggregate upstream queue fill (QFUA). The
            LRCC-O aggregates the QFDA and QFUA for the trigger period (TRIGR_PERIOD) and compares with trigger
            thresholds (TRIGR_THRESH) according to the threshold criteria in Table Z.11. The LRCC-O shall request a
            transition from L2.1N to L0 or from L2.2 to L2.1B if and only if the related threshold criteria are met for
            QFDA or QFUA or both over a trigger persistency period (TRIGR_PERSIST).

            Each  valid transition  is either  positive  (increasing  traffic  rate) or  negative  (reducing  traffic  rate).  Trigger
            criteria for the valid traffic driven link state transitions of Table Z.10 are shown in Table Z.11.


                           Table Z.11 – Trigger criteria for the valid traffic driven link state transitions


                                                                                             Conditional state
                Trigger      Type       Threshold criteria         Persistency criteria
                                                                                                 change

             L0_L2.1N     negative   QADA, QAUA <         TRUE for period >                  Both DS and US
                                     L0_L2.1N_TRIGR_      L0_L2.1N_TRIGR_PERSIST_QA          trigger TRUE
                                     THRESH_QA

             L2.1N_L0     positive   QFDA, QFUA >         TRUE for period >                  DS or US or both
                                     L2.1N_L0_TRIGR_      L2.1N_L0_TRIGR_PERSIST_QF          trigger TRUE
                                     THRESH_QF
             L2.1B_L2.2   negative   QADA, QAUA <         TRUE for period >                  Both DS and US
                                     L2.1B_L2.2_TRIGR_    L2.1B_L2.2_TRIGR_PERSIST_QA        trigger TRUE
                                     THRESH_QA
             L2.2_L2.1B   positive   QFDA, QFUA >         TRUE for period >                  DS or US or both
                                     L2.2_L2.1B_TRIGR_    L2.2_L2.1B_TRIGR_PERSIST_QF        trigger TRUE
                                     THRESH_QF

            Z.6.2.3.2  Battery operation status driven link state transitions
            Valid battery operation status driven link state transitions are shown in Table Z.12.
























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