QTCP's LinkController might miss LinkRequests arriving while entanglement is being attempted #304
Description
Is your feature request related to a problem? Please describe.
In the QTCP protocol suite, the LinkController waits for a request, waits for entanglement generation, then waits for the next request and so on. However, it will miss any request that arrives while it's waiting for entanglement to be generated.
Describe the solution you’d like
Need to implement a queue of LinkLevelRequests at the link controller, and it should serve one at a time every time the EntanglerProt returns a Bell pair. This problem is a minor issue now, but will become an actual bug when we extend the LinkController to parametrized attempt time and success probability.
Describe alternatives you’ve considered
Could exploit a LinkRequestServer subprotocol to take care of serving the scheduled request, while the main protocol takes care of the queue
Additional context