If the solution is correct, the received voting request is considered valid, and the received timestamp T s is registered in the puzzle history table, i.e., in the entry corresponding to the MAC address of the current voting request node.
As shown in Figure 6, node 1 is the current packet forwarder and enters a new road segment 1. Since the local time of each node is synchronized with GPS, node 1 can readily get the current time T1s through the received timestamp when it enters into road segment 1.
Because of this, the coding order is not the same as the display order and hence the received timestamps are not monotonically increasing.
We say that an SPE adopts ingestion time semantics when each input element is timestamped when it first enters the engine, assuming that a single machine receives and timestamps all the input elements.
Inside each Raspberry Pi [37] platform was a python program running, responsible to get timestamp data from each sink with respect to query packets sent and reply packets received.
When the receiver receives that packet, it echoes the timestamp value back to the sender in the corresponding Acks.
Setting timestamps on received packets or adding timestamps in outgoing packets is done in the radio driver (because this is best done below the MAC layer) and the maclets could implement a time-synchronization protocol.
If any limit is reached and an action is initiated, all QoD state vectors associated with that action are reset: θ receives a new timestamp, σ and ν go to zero.
In the microbechmark, we record the timestamp (in nanoseconds) of receiving each sensor event and calculate the time interval between each two continuous sensor events' timestamps.
This information encompasses the type of event (packets being sent, received, or lost), timestamps, origin and destination addresses, energy consumption by the node involved in the event, identifier, packet size and type, an identifier for the message flow to which the packet belongs, among others.
All personal logs have timestamps.
