摘要
In recent years, mobile devices have become more powerful in terms of computing power, memory, screen size, and screen quality. This provides an improved experience for viewing TV and multimedia content and has resulted in increasing demand for multimedia services for mobile devices. However, video streaming to mobile devices still has many challenges that need to be addressed. One challenge for mobile video is the limited wireless bandwidth in wide-area wireless networks. The wireless bandwidth is not only limited, but also quite expensive. Thus, for commercially viable mobile video services, network operators should maximize the utilization of their license-based wireless spectrum bands.