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In Software Defined Networking (SDN), the severe conflict between rule number and memory size has attracted considerable academic attention. Ternary Content Addressable Memory (TCAM), generally used to guarantee the query speed, is a scarce and expensive resource, which limits the number of rules that the switch can support. However, the table miss may increase processing burden of the controller...
Due to the expensive hardware and complex management of the traditional middlebox, a concerted effort towards the virtualized middlebox has been launched in both academia and industry. In this paper, we propose a unified middlebox model, MBBrick, which is composed of three operation modules (classifier, rewriter, forwarder) and a control module (the mcontroller). We then design a language, MG, to...
Software Defined Networks (SDN) enables flexible flow control by installing policy rules into switches. However, one of the challenges is the dependencies between rules, which is generated due to the rules overlapping in filed space with different priorities. To keep the forwarding correctness and avoid complicated scenarios caused by the asynchronous removal, controllers usually adopt a hard timeout...
Software Defined Networking (SDN) enables network innovation and brings flexibility by separation of the control and data planes and logically centralized control. However, this network paradigm complicates flow rule management. Current approaches generally install rules reactively after table misses or pre-installs them by flow prediction. Such approaches consume nontrivial network resources during...
In Software Defined Networking (SDN), the configuration inconsistency during updates is one main source of network instability. An efficient updating scheme with configuration consistency is required. In this paper, we propose the scheme of Fast Incremental Consistent Update for SDN (FICUS) based on the relation graph (RG). In our scheme, we analyse the relation between update operations, construct...
Link flooding attack (LFA), as a new type of DDoS attack, can degrade or even cut off network connectivity of a target area. This attack employs legitimate, low-density flows to flood a group of selected links. Therefore, these malicious flows can hardly be distinguished by traditional schemes. In this paper, we propose a scheme called Woodpecker, which makes the LFA more difficult to take effect...
Dynamic password technology is widely utilized for identity authentication, which depends on using hash functions, such as SM3. And SM3 hash algorithm is based on the mixing of different group operations, such as XOR and addition modulo 232. In this paper, we present two original first-order differential power analysis attacks on dynamic password token based on SM3 algorithm. The two proposed DPA...
Case‐parent trio studies are commonly employed in genetics to detect variants underlying common complex disease risk. Both commercial and freely available software suites for genetic data analysis usually contain methods for case‐parent trio designs. A user might, however, experience limitations with these packages, which can include missing functionality to extend the software if a desired analysis...
This paper proposes an improved chemical abstract machine to accurately describe the behavior characteristics of components based on chemical computation model. The chemical abstract machine is analyzed from the perspective of software field, thereupon the formal description of chemical abstract machine is given based on ?c computation model. Firstly, we analyze the dynamic characteristics of components...
In the paper, the authors proposed the concept of patient satisfaction degree and established some factors that affect patient satisfaction degree according to the research on the spot in the concrete hospitals and systemic analysis. Firstly, it took ten hospitals in the 14 three A-level hospitals as examples in random, and handed out the questionnaires of patient satisfaction degree. Then the paper...
Based on an introduction to customer relationship management's role in maintaining existing customers and acquiring new customers, this paper presents the core element of establishing a long-term, stable and reciprocal relationship with targeted customers by meeting individualized requirements and exercising customer care. Under the direction of this philosophy, MapGIS K9 platform and Oracle 9i database...
This paper analyzes the concept of cloud computing as well as its connotations of virtualization, servitization and intellectualization. And it indicates on the basis of the connotations of cloud computing the future development trends of Management Information System (MIS) in terms of technical basis, development mode and functional application, namely, with the wide application of cloud computing,...
The paper illustrates the necessity and development prospect of EP-ERP system application in electricity generating enterprises by analyzing significance of information-based construction. The conception of establishing EP-ERP system model in management of electricity generating enterprises, aiming at the current situation of information-based construction in electricity generating enterprises, is...
This article talks about the concept of mobile learning, technology to support mobile learning and models of mobile learning practice. The authors also give us a lot of scenarios to introduce mobile learning as a way to improve learnerspsila experience of learning, optimize learning process and get better learning results.
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