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Hello Vivek,
Please find the comments inline:
3) Is there a
preference for handover direction or is the requirement for equal performance in
both directions (i.e. bidirectional handover)?
IEEE 802.16 prefers to
have bidirectional handovers with equal performance to the extent possible. IEEE
802.16 plans to use 802.21 mechanisms for handovers with other external
networks.
Junghoon> The suggested last sentence seem to imply that the use of IEEE 802.21 mechanism in IEEE 802.16 is still on the planning stage.
However, as many of us already know, the 802.21's work is already incorporated to the IEEE 802.16g. Therefore, I think we need more clarify the last sentence if we want to mention about the IEEE 802.21 here.
4) If available,
are you able to provide an expected timeline for completion of this activity
from IEEE 802.16 perspective?
IEEE 802.16e standard was completed in 2006. IEEE 802.16m is in initial stages of development and the current expected completion timeline is towards the end of 2009.
Junghoon> We can add the stage of IEEE 802.21's work.
6) What is the
expected interruption time for handover between the
technologies?
The
intra-technology handovers in IEEE 802.16 meet the performance requirements of
real time multimedia and VoIP applications. For intra-technology handovers IEEE
802.16 believes that the expected interruption time should not exceed [100 ms]
for real time services.
It is desirable to
minimize handover interruption time for inter-technology handovers as much as
possible to satisfy service continuity.
Junghoon> It seems that they want to have specific interruption time for inter-technology handover. Is there any one we can suggest this number?
BR,
Junghoon