The tester progressively replaces isolated features with real environment features, sometimes implemented by means of mock testing classes (e.g., sensor mocks, GPS mocks, etc.). The application remains on the device emulator, but the environment progressively removes isolation.Ĭonsequently, this stage will involve several consecutive iterations of system testing. In the prototyping stage, the testing activities aim to exercise the application in a modified execution context that is not yet the real execution environment, but progressively approaches that environment. Bryan Robbins, in Advances in Computers, 2013 5.3.2 Prototyping Stage of System Testing Namely, the energy footprint of the active proxy delegation protocol is close to the optimized version.ĭomenico Amalfitano. Surprisingly, the neighbor discovery does not significantly impact the active proxy delegation protocol in this aspect. The passive proxy is silent during the initialization phase, while the active proxy advertises the _sleep-proxy service.
#Windows mobile 4 emulator mac registration
The passive proxy delegation protocol requires less energy due to the smaller number of messages during both the initialization phase and the registration phase. The energy usage is measured during the entire simulation, and includes the mDNS initialization stage, where every node advertises its host name and address. Even though the difference between the two in terms of delay is large, they consume similar amounts of energy at the PS side.įinally, Fig. 4.10C shows the average energy usage of the dummy node in the network. This is visible in the energy usage of the active proxy delegation protocol and the optimized version with a 4-Hz wake-up interval. Furthermore, in the active proxy delegation protocol, if a message loss occurs during the neighbor discovery phase, the sender will be silent for the entire time-out period, which introduces a large delay, but not much energy usage. We attribute this behavior to the efficiency of the ContikiMAC protocol.
The energy usage of the passive proxy delegation protocol is lower compared to the active proxy delegation protocol, although the differences are not as high as with the delay. The energy usage of the overhearing node (C) is measured for the entire simulation duration. ap-hole refers to the optimized version of the active proxy delegation protocol. ap and pp refer to the active/passive proxy delegation protocol, with 4-, 8-, and 16-Hz wake-up intervals for the ContikiMAC Radio Duty Cycling Protocol. (A) Sleeping service provider (B) proxy server (C) overhearing node. Energy Usage for Completing the Active and Passive Proxy Delegation Protocols
In this optimized version, the link layer address of the PS is generated from the last 8 bytes of the IPv6 address, present in the AAAA RR of the _sleep-proxy service description.įigure 4.10. 4.4), we also implement an optimized version of the active proxy delegation protocol ( ap-hole), where the neighbor discovery stage is skipped. To verify the impact of the neighbor discovery protocol (Step 2 of the active proxy delegation protocol from Fig. We compare the performance of the active ( ap) and passive proxy ( pp) delegation protocol. This should be enough to capture any retransmissions of unicast frames by the CSMA/CA protocol. Finally, the time-out of the entire step 3 is set at 2 s. The repetition of step 2 of the active proxy delegation protocol is dictated by the neighbor discovery protocol, and the time-out is fixed at 10 s. The time-out for completion of step 1 from the active proxy delegation protocol and the entire passive proxy delegation protocol is set at five times the RDC wake-up interval. Therefore, we implement repetitions of individual stages of the delegation protocols based on the expiry of fixed time-outs. We use it to show the impact of the protocols to nodes in the vicinity.ĭue to packet loss, the proxy delegation may not succeed in its first iteration. The dummy node does not participate in the proxy delegation protocol, but it overhears all traffic in the network. After the delegation finishes, the SSP turns off its radio, and the simulation is stopped. At second 7, the SSP starts delegating the service description to the PS using one of the previously described protocols. At second 5, the SSP advertises its service. The simulation starts with all nodes being online. All charts show the mean values of 1000 runs, and the error bars correspond to the 95% confidence interval of the mean. All nodes are within the same broadcast domain.įor radio propagation, we use a constant loss rate model, with varying packet delivery ratio between 80% and 100%, at 2% increments.