Request management

The request management module can select several sessions (a source node and destination node) randomly for large-scale evaluation. A Request includes the following attributions:

src: the source node
dest: the destination node
attr: the attributions of this session, such as the fidelity requirement, the QoS or the bandwidth requirement.

QuantumNetwork provides add_request to manually add a new request and random_requests to randomly generate several requests:

# randomly generate 5 requests
net.random_requests(number=5)

# random generate 5 requests, but nodes can have multiple requests (allow overlay)
net.random_requests(number=5, allow_overlay=True)

# random generate 5 requests, with certain attributions
net.random_requests(number=5, attr={"qos":2})

# manually add a request
net.add_request(Request(src=n1, dest=n3, attr={"qos":2}))

The network object and the nodes can query the related requests:

net.requests # get all requests

n1.requests # get all requests related to n1

n1.clear_request() # remote all requests on n1

Example applications and protocols

SimQN provides internal applications in qns.network.protocol.

BB84SendApp and BB84RecvApp is the simple demonstration protocol for BB84 QKD protocol without the after procedures, including error detecting, information reconciliation, and privacy amplification.

EntanglementDistributionApp provides a hop-by-hop entanglement distribution protocol, where the source distribute entanglements to the destination at a fixed rate.

ClassicPacketForwardApp can automatically forward all classic messages if the destination is not the current node. It will use the routing module (qns.network.route) to build classic routing tables.

NodeProcessDelayApp can add processing delay on quantum nodes if they receive certain events.

Those examples may be helpful for users to implement their own protocols. SimQN is working on providing more internal protocols for more scenarios.