round-robin and pow

Question

Acorrding to the Multichain White Paper, the private  blockchain uses a round-robin schedule and a mining diversity threshold, instead of the proof of work.

We have some questions:

1)  If we create a bitcoin-style blockchain, in which "chain-protocol = bitcoin;  anyone-can-connect = true; anyone-can-mine = true...".   Should we still use the   round-robin schedule?  Is it safer or more effective  than PoW?

2)  In the  round-robin schedule,  What are the basic objects of scheduling?  the IP address of the node server or the wallet addresses of the node server?
If it is the later,  a node server have created many,many wallet addresses of mine -permission,  whether will it have more mine right  and rate than other nodes?

Answer 1

You cannot use the round-robin schedule effectively if mining is open to everybody, because the round robin is defined in terms of the set of permissioned miners. So you would need to use proof-of-work for that.

In the round robin schedule, the basic object of scheduling is an address. If a node has multiple addresses which have been granted permission to mine, it will indeed be able to mine more blocks than other nodes. (But again, this is only relevant if mining is restricted to permissioned addresses.)