If VNF and PNF are deployed through different processes, it's crucial to
maintain synchronization and ensure smooth operation. This commit
addresses the need to keep the VNF slot ahead of 2 (as required for
network deployment), while ensuring that PNFs wait appropriately to
avoid overtaking the slot. Specifically, this involves measuring slot
duration and implementing a wait mechanism to ensure that PNFs do not
exceed a slot duration of 300 microseconds. This ensures proper smooth
operation, especially in the case of RFsim.
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