On certain streaming services, it is also significant to provide guaranteed QoS (quality of services) to satisfy the real-time and stringent delay requirement because the real networks are heterogeneous in bandwidth and reliability.

• 对于特定的串流服务，由于真实网路在频宽与可靠性上的变异，提供有保证的服务品质来满足即时性与紧迫的延迟需求是重要的。