Survey of computing power network

In September 2021, ITU-T released the first international recommendation for computing power networks (CPNs), ITU-T Y.2501 jointly led by China Telecom, China Unicom and Huawei, and started the Y.2500-Y.2599 series of recommendations for computing power networks. The computing power network is a new type of network that integrates multilevel computing resources, realizes the efficient coordination of the cloud, edge and network, improves the utilization efficiency of computing resources and provides users with the optimal computing and network resource services. Since the first proposal of the computing power network in 2019, it has made breakthroughs in its research and standardization work. As a new field of international standards, also a new field of the communication industry, this paper gives a comprehensive analysis of its definition, framework, service model, key technologies and current progress and challenges, summarizing the research direction of future computing power networks which will have strong implications for the research and implementation of the computing power network.