Jing Han - IEEE Xplore Author Profile

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The traditional database technology can't meet the rapidly growing information and the demands of extreme scalability, high availability and reliability for the mass data. In this paper, we have designed a distributed storage system based MPP(massively parallel processing) architecture on RDBMS to solve these problems. First, we present the main framework and the function architecture of the desig...Show More
With high quality of data, enterprises will add value of business. How-ever, poor data has resulted in waste of resource, low service efficiency and high costs in every area. In this paper, we firstly focus on basic issues of data quality, like where the quality problems come from and how to describe it. Then we study some cases of data quality management from a holistic enterprise perspective to ...Show More
In order to benefit from cloud computing services without risk, a good solution is building a private cloud in premise. This paper analyzes the advantages of a private cloud, through physical machine clusters and XEN virtualization technology, A private cloud topology is designed first, and analyze cache mechanism and load balancing policy of a private cloud infrastructure, then design a XEN-based...Show More
The traditional relational database to online storage are becoming increasingly problematic: the low performance do not gracefully meet the needs of mass data, the storage approaches of massive data are still not perfect presents. NoSQL and distributed memory database technologies have the potential to simplify or eliminate many of these challenges. NoSQL database technologies can provide Key-valu...Show More
Relay selection is a challenging issue in cooperative communication networks. In particular, in a multi-user multi- concurrent-transmission network, effects of the resource sharing of a relay by its served users on the relay selection strategy need to be taken into account. There is little research on this investigation in literature. In this paper, we propose a novel efficient and fair relay sele...Show More
In this paper, the results of the quality of service for VoIP service over TD-SCDMA HSDPA system are presented. The performances of the system with different scheduling algorithms and different retransmission times are simulated and analyzed. Dynamic scheduling, adaptive modulation and code (AMC), dynamic HARQ are implemented in the system-level simulation and some recommends for HARQ channel numb...Show More
Providing voice over IP (VoIP) service in wireless networks is especially challenge for the tight delay requirement and the small voice packet. This paper addresses the unique issues when providing VoIP in TD-SCDMA HSDPA (time duplex division-synchronous code division multiple access high speed downlink packet access) systems. The impact of smart antenna was analyzed, which results in relative sma...Show More
This paper deals with decode-and-forward (DF) relaying scheme in multihop wireless networks. Through making full use of end-to-end system outage probability requirement in multihop route, an efficient optimal power allocation (OPA) scheme that minimizing the aggregate power consumption is proposed. Theory analysis and numerical simulation indicate that compared with the traditional power allocatio...Show More
This paper proposes a fast and reliable technique for timing and frequency synchronization of multiple-input multiple- output (MIMO) orthogonal frequency division multiplexing (OFDM) systems. The synchronization is achieved using one chu sequence-based preamble which is simultaneously transmitted from all transmit antennas in the same OFDM time instant. From analysis, the chu sequence-based preamb...Show More
Providing multimedia service is particularly challenging in wireless networks such as high speed downlink packet access (HSDPA) system for the fading properties of its radio links. In this paper, a generalized scheduling algorithm is presented, which allows controlling over user fairness as well as balancing fairness-throughput trade-off. Furthermore, we show that the generalized algorithm can wel...Show More