Well this whole topic is a bit too much PHY-oriented for our course, but I think the following could be interesting for CN1/CN2 context: Normally, when you send packets between NBIoT sensor and the network (uplink or downlink, no difference), you have some overheads associated with actually wrapping the information into all of the appropriate headers before it can get sent to the sensor. Clearly, if you are sending 1 byte of payload (e.g. temperature reading) it may often get ridiculous. To illustrate this, We think a good idea is to make a few “example packets” that could realistically be exchanged between NBIoT sensor and the cloud. Here are the packets you should make (as .pcap file, so it can be examined with Wireshark): 1. LTE (whatever is needed by link layer) | IPv6 | TCP| TLS | MQTT/HTTPS 2. LTE (whatever is needed by link layer) | IPv6 | IPSEC ESP | UDP | raw payload (1 byte)| //Encryptionparameters and key should be given so Wireshark can actually decode the encrypted payload 3. ZigBee/WiFi (whatever is needed by link layer) | IPv6 (6lowpan) | UDP | payload (1 byte) | All packets can be provided in the same .pcap file, or in separate files as preferred. To make the packets you can use any of the packet manipulation libraries like ScaPy or e.g. the stuff linked here: https://wiki.wireshark.org/MAC-LTE. The report should include: 1. Explanation of what is needed on the link layer and why 2. Estimate of PHY layer overheads not captured by .pcap format 3. Estimate of overall efficiency of each method (i.e. % of overheads vs % of actual payload). Let me know if there is anything unclear in assignment. So basically I need 3 things. 1. Three .pcap file 2. Screenshot of wireshark analysis 3. Report – not too lengthy. Just those answers to the point.Well this whole topic is a bit too much PHY-oriented for our course, but I think the following could be interesting for CN1/CN2 context: Normally, when you send packets between NBIoT sensor and the network (uplink or downlink, no difference), you have some overheads associated with actually wrapping the information into all of the appropriate headers before it can get sent to the sensor. Clearly, if you are sending 1 byte of payload (e.g. temperature reading) it may often get ridiculous. To illustrate this, We think a good idea is to make a few “example packets” that could realistically be exchanged between NBIoT sensor and the cloud. Here are the packets you should make (as .pcap file, so it can be examined with Wireshark): 1. LTE (whatever is needed by link layer) | IPv6 | TCP| TLS | MQTT/HTTPS 2. LTE (whatever is needed by link layer) | IPv6 | IPSEC ESP | UDP | raw payload (1 byte)| //Encryptionparameters and key should be given so Wireshark can actually decode the encrypted payload 3. ZigBee/WiFi (whatever is needed by link layer) | IPv6 (6lowpan) | UDP | payload (1 byte) | All packets can be provided in the same .pcap file, or in separate files as preferred. To make the packets you can use any of the packet manipulation libraries like ScaPy or e.g. the stuff linked here: https://wiki.wireshark.org/MAC-LTE. The report should include: 1. Explanation of what is needed on the link layer and why 2. Estimate of PHY layer overheads not captured by .pcap format 3. Estimate of overall efficiency of each method (i.e. % of overheads vs % of actual payload). Let me know if there is anything unclear in assignment. So basically I need 3 things. 1. Three .pcap file 2. Screenshot of wireshark analysis 3. Report – not too lengthy. Just those answers to the point.
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