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FSRP: Fast Service Data Retrieval Protocol For IP-USN
Muhammad Taqi Raza H. M.,Syed Rehan Afzel,Chung Tae-Sun,Seung-wha Yoo,Ki-Hyung Kim 대한전자공학회 2007 ITC-CSCC :International Technical Conference on Ci Vol.2007 No.7
IP-Ubiquitous Sensor Network (IP-USN) is a network composed of smart sensor nodes that are small, low power and limited memory devices, connected with the internet over IPv6, and capable of environment sensing, data computing and wireless communication among the sensor nodes. Energy conservation is the major issue in the sensor network paradigm, because lower energy cost increases the overall life time of the sensor network. IP-USN wide range of applications in scientific, medical, commercial, and military domain, stands out service discovery role from all. Sensor nodes need to store some amount of service information due to the fact that timely querying for service data decreases the network performance. So in this paper, we proposed an efficient service data retrieval protocol that stores the information about the services which are more often than not, resulting fast data retrieval possible under low energy costs. We also discussed the performance between SD protocol with and without FSRP implementation.
Rapid Recovery from Link Failures in Software-Defined Networks
Pankaj Thorat,Syed M. Raza,김동수,추현승 한국통신학회 2017 Journal of communications and networks Vol.19 No.6
Carrier-grade networks (CGNs) can leverage the networkprogrammability of software-defined networking (SDN) toensure fast recovery and high availability. However, for the successfuladoption of SDN, the failure recovery requirement must beaddressed. Local detouring is a popular approach for faster recoveryrather than path-based end-to-end recovery. For fast localrecovery, alternate paths must be preinstalled for each individualflow on the link, which in some cases results in storing thousandsof alternate path flow rules. Furthermore, the dependenceon the controller for dynamic per-flow detouring may delay the recovery. In this paper, we propose local immediate (LIm) and immediatecontroller dependent (ICoD) recovery mechanisms to addressthe limitations of OpenFlow-based link recovery approaches. Ourproposed mechanisms considerably reduce the alternate path flowrules by aggregating the disrupted flows using virtual local areanetwork (VLAN) tagging. The proposed algorithms achieve recoverywithin 3 ms and 20 ms, respectively and satisfy the strict 50 msrecovery requirement of CGNs. LIm and ICoD also reduce the alternatepath flow storage requirement by up to 99%. Simulationresults reveal that the flow-aggregation also reduces the effort ofthe controller and minimizes the alternate path installation traffic.
무선 네트워크에서 시퀀스-투-시퀀스 기반 모바일 궤적 예측 모델
( Sammy Yap Xiang Bang ),양희규 ( Huigyu Yang ),( Syed M. Raza ),추현승 ( Hyunseung Choo ) 한국정보처리학회 2022 한국정보처리학회 학술대회논문집 Vol.29 No.1
In 5G network environment, proactive mobility management is essential as 5G mobile networks provide new services with ultra-low latency through dense deployment of small cells. The importance of a system that actively controls device handover is emerging and it is essential to predict mobile trajectory during handover. Sequence-to-sequence model is a kind of deep learning model where it converts sequences from one domain to sequences in another domain, and mainly used in natural language processing. In this paper, we developed a system for predicting mobile trajectory in a wireless network environment using sequence-to-sequence model. Handover speed can be increased by utilize our sequence-to-sequence model in actual mobile network environment.
Rugved Kulkarni,Irfan Kabir,James Hodson,Syed Raza,Tahir Shah,Sanjay Pandanaboyana,Bobby V. M. Dasari 한국간담췌외과학회 2022 Annals of hepato-biliary-pancreatic surgery Vol.26 No.1
In patients with neuroendocrine tumors with liver metastases (NETLMs), complete resection of both the primary and liver metastases is a potentially curative option. When complete resection is not possible, debulking of the tumour burden has been proposed to prolong survival. The objective of this systematic review was to evaluate the effect of curative surgery (R0-R1) and debulking surgery (R2) on overall survival (OS) in NETLMs. For the subgroup of R2 resections, outcomes were compared by the degree of hepatic debulking (≥ 90% or ≥ 70%). A systematic review of the literature was conducted according to the Preferred Reporting Items for Systematic Reviews and Meta-analysis (PRISMA) guidelines using PubMed, Medline, CINAHL, Cochrane, and Embase databases. Hazard ratios (HRs) were estimated for each study and pooled using a random-effects inverse-variance meta-analysis model. Of 538 articles retrieved, 11 studies (1,729 patients) reported comparisons between curative and debulking surgeries. After pooling these studies, OS was found to be significantly shorter in debulking resections, with an HR of 3.49 (95% confidence interval, 2.70–4.51; p < 0.001). Five studies (654 patients) compared outcomes between ≥ 90% and ≥ 70% hepatic debulking approaches. Whilst these studies reported a tendency for OS and progression-free survival to be shorter in those with a lower degree of debulking, they did not report sufficient data for this to be assessed in a formal meta-analysis. In patients with NETLM, OS following surgical resection is the best to achieve R0-R1 resection. There is also evidence for a progressive reduction in survival benefit with lesser debulking of tumour load.