This paper investigates arbitration algorithms of SpaceWire router

offers an dynamic weighted round-robin arbitration algorithm

the writer of this paper designs arbiter module according to the algorithm. It is based on priority and round-robin algorithms. The characteristics of the new algorithm is to avoid high-priority router ports will dominate the output port in the priority algorithm

and to resolve the problem that priority coefficients are excessively average. The new algorithm make router could admeasure priority coefficients according to the performance requirement of payloads

so the high real-time payloads can transmit data in time and reduce delay-time. The paper explains the design and implementation of arbiter module as the end.