On August 7th 2009, Chinese Prime Minister Wen Jiabao visited Wuxi, Jiangsu Province. During the trip, he gave three suggestions for the national development strategy and in particularly indicated the importance of the “Cognitive Sense of China”. Cognitive Sense of China, the vision that physical systems such as intelligent utility networks (or smart grids), intelligent transportation systems, and various environmental monitoring systems should become accessible to the online world and to the people; this vision is more and more becoming a reality. With the Cognitive Sense of China, ubiquitous Machine to Machine (M2M) services will become feasible and make major changes to our future daily life and the future human society. Cognitive Sense of China points out the importance of knowledge cognition from various collections of sensed data. Indeed China is setting forth an ambitious plan to accelerate research and development as well as application of sensing and cognition in China. The aim of this special issue is to bring together the state-of-art research on cognitive sense of China. Building on the great potential benefits to the future, Cognitive Sense of China poses a number of key challenges, not only due to the nature of the enabling technologies but also due to the sheer scale of their deployment. These challenges, as indicated by the term of the cognitive sense, fall into two major categories. The first category mainly involves the sensing operations, more specifically, the collection of the sensing data from various sensing, monitoring, surveillance systems. Recently, a more general concept of these sensing systems, the Internet of Things, has become the subject of a great many research works. China is increasing the speed of development of the Internet of Things, making it a new engine for economic growth and an opportunity to catch up with the developed countries. The Internet of Things has the following unique characteristics: physical objects, network of objects, intelligence and interaction of objects. Its definition varies depending on the perspective that is taken. From the functionality and identity perspective it can be defined as Internet-enabled objects having identities and virtual personalities operating in smart spaces using intelligent interfaces to connect and communicate within social, environmental, and user contexts. The key enabling technologies include RFID, Wireless Sensor Networks, smart phones and mobile computing, pervasive computing and ubiquitous wireless communications. The other major challenge involves the cognitive, i.e., the processing of the sensing data to obtain new information and knowledge. This category of enabling technologies includes extreme-scale data storage and processing, data interaction and evolution, information retrieval, database management and data mining. Different from the traditional studies in these fields, one unique requirement of Cognitive Sense of China is the extreme-scale. The data volume that needs to be processed in a real-time manner (say, within a second) is typically on the order of petabytes (1 PB = 10Bytes and roughly speaking, 1 PB is 1000million MB). This data demand is increasing exponentially according to the current trends. Processing on such a scale, brings great challenges to the traditional research and technologies in these fields. Fortunately, for many applications the basic processing technologies are quite mature, and moreover, in many cases incomplete, and imperfect processing results are tolerable and acceptable. In other words, we may need to alter our research philosophy in these fields, changing our design objectives from the accuracy and efficiency to true scalability.
Read full abstract