Toward Real-Time and Fine-Grained Monitoring of Software-Defined Networking in the Cloud

2016 ◽  
Author(s):  
Dongfang Zhao
Keyword(s):  
Real Time ◽  
Software Defined Networking ◽  
Fine Grained

scholarly journals The interactional achievement of speaker meaning: Toward a formal account of conversational inference

2018 ◽  
Vol 15 (5) ◽  
pp. 593-625 ◽  
Author(s):  
Chi-Hé Elder ◽  
Michael Haugh
Keyword(s):  
Real Time ◽  
Theoretical Assumption ◽  
Fine Grained ◽  
Local Process ◽  
Speaker Meaning ◽  
Pragmatic Analysis ◽  
Proposed Model ◽  
Partial Representation ◽  
Meaning Negotiation ◽  
Theories Of Meaning

Abstract Dominant accounts of “speaker meaning” in post-Gricean contextualist pragmatics tend to focus on single utterances, making the theoretical assumption that the object of pragmatic analysis is restricted to cases where speakers and hearers agree on utterance meanings, leaving instances of misunderstandings out of their scope. However, we know that divergences in understandings between interlocutors do often arise, and that when they do, speakers can engage in a local process of meaning negotiation. In this paper, we take insights from interactional pragmatics to offer an empirically informed view on speaker meaning that incorporates both speakers’ and hearers’ perspectives, alongside a formalization of how to model speaker meanings in such a way that we can account for both understandings – the canonical cases – and misunderstandings, but critically, also the process of interactionally negotiating meanings between interlocutors. We highlight that utterance-level theories of meaning provide only a partial representation of speaker meaning as it is understood in interaction, and show that inferences about a given utterance at any given time are formally connected to prior and future inferences of participants. Our proposed model thus provides a more fine-grained account of how speakers converge on speaker meanings in real time, showing how such meanings are often subject to a joint endeavor of complex inferential work.

scholarly journals Real-Time Support in the Proposal for Fine-Grained Parallelism in Ada

2015 ◽  
Author(s):  
Luis Miguel Pinho ◽  
Brad Moore ◽  
Stephen Michell ◽  
S. Tucker Taft
Keyword(s):  
Real Time ◽  
Fine Grained ◽  
Fine Grained Parallelism

scholarly journals From embracing to managing risks

BMJ Open ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. e022921 ◽  
Author(s):  
Justin Keen ◽  
Emma Nicklin ◽  
Nyantara Wickramasekera ◽  
Andrew Long ◽  
Rebecca Randell ◽  
...  
Keyword(s):  
Real Time ◽  
Middle Managers ◽  
Safety Information ◽  
Active Management ◽  
Management Systems ◽  
Quality Of Data ◽  
Fine Grained ◽  
Information Infrastructures ◽  
The Many ◽  
Board Level

ObjectiveTo assess developments over time in the capture, curation and use of quality and safety information in managing hospital services.SettingFour acute National Health Service hospitals in England.Participants111.5 hours of observation of hospital board and directorate meetings, and 72 hours of ward observations. 86 interviews with board level and middle managers and with ward managers and staff.ResultsThere were substantial improvements in the quantity and quality of data produced for boards and middle managers between 2013 and 2016, starting from a low base. All four hospitals deployed data warehouses, repositories where datasets from otherwise disparate departmental systems could be managed. Three of them deployed real-time ward management systems, which were used extensively by nurses and other staff.ConclusionsThe findings, particularly relating to the deployment of real-time ward management systems, are a corrective to the many negative accounts of information technology implementations. The hospital information infrastructures were elements in a wider move, away from a reliance on individual professionals exercising judgements and towards team-based and data-driven approaches to the active management of risks. They were not, though, using their fine-grained data to develop ultrasafe working practices.

scholarly journals Attribute-Guard: Attribute-Based Flow Access Control Framework in Software-Defined Networking

2020 ◽  
Vol 2020 ◽  
pp. 1-18 ◽  
Author(s):  
Xianwei Zhu ◽  
ChaoWen Chang ◽  
Qin Xi ◽  
ZhiBin Zuo
Keyword(s):  
Access Control ◽  
Software Defined Networking ◽  
Authentication Protocol ◽  
Network Characteristics ◽  
Fine Grained ◽  
Control Framework ◽  
Data Plane ◽  
Data Validity ◽  
The One ◽  
Matching Field

Software-defined networking (SDN) decouples the control plane from the data plane, offering flexible network configuration and management. Because of this architecture, some security features are missing. On the one hand, because the data plane only has the packet forwarding function, it is impossible to effectively authenticate the data validity. On the other hand, OpenFlow can only match based on network characteristics, and it is impossible to achieve fine-grained access control. In this paper, we aim to develop solutions to guarantee the validity of flow in SDN and present Attribute-Guard, a fine-grained access control and authentication scheme for flow in SDN. We design an attribute-based flow authentication protocol to verify the legitimacy of the validity flow. The attribute identifier is used as a matching field to define a forwarding control. The flow matching based on the attribute identifier and the flow authentication protocol jointly implement fine-grained access control. We conduct theoretical analysis and simulation-based evaluation of Attribute-Guard. The results show that Attribute-Guard can efficiently identify and reject fake flow.

scholarly journals PARD: Hybrid Proactive and Reactive Method Eliminating Flow Setup Latency in SDN

2020 ◽  
Vol 28 (4) ◽  
pp. 1547-1574
Author(s):  
Michal Rzepka ◽  
Piotr Borylo ◽  
Artur Lason ◽  
Andrzej Szymanski
Keyword(s):  
Packet Loss ◽  
Traffic Engineering ◽  
Hardware Design ◽  
Software Defined Networking ◽  
Fine Grained ◽  
Flow Table ◽  
Scientific Papers ◽  
Reactive Method ◽  
Full Maturity

Abstract Advantages of Software Defined Networking are unquestionable and are widely described in numerous scientific papers, business white papers and press articles. However, to achieve full maturity, crucial impediments to this concept and its shortcomings must be overcame. One of the most important issues regards significant setup latency of a new flow. To address this issue we propose PARD: a hybrid proactive and reactive method to manage flow table entries. Additional advantages of the proposed solution are, among the others, its ability to preserve all capabilities of Software Defined Networking, utilization of multiple flow tables, a possibility to employ fine-grained traffic engineering and, finally, compatibility with existing protocol and hardware design. It is shown that the proposed solution is able to significantly reduce latency of first packets of a new flow, which directly impacts packet loss and perceived throughput. Thus, our solution is expected to enable a wide deployment of Software Defined Networking concept without any need for protocol changes or, what is extremely important, hardware modifications.

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