multiple access techniques in computer networks ppt
Báo cáo hóa học: " Enabling location-aware quality-controlled access in wireless networks" ppt
... unfairnessby reducing the chances of transmission for the sendingstations in the way of increasing the minimum conten-tion window size. The downlink compensation access (DCA) algorithm in [16] gives ... Analytical modeling of TCP clients in Wi-Fi hotspot networks, in Proceedings of IFIP Networking (2004)36. S Choi, K Park, C Kim, Performance impact of inter-layer dependency in infrastructure ... services, intelligent traffic alerts,tracking, pinpointing child’s location, and local map pro-visioning have been dealt with much attention in thecommunity [2-4]. Noticeable point is that...
- 19
- 425
- 0
báo cáo hóa học:" Multiple access communications in future-generation wireless networks" potx
... and efficient wireless access in challenging interference scenarios, for example, multiple networks deployed in the same geographical area and sharing a common band. In 1976, an ALOHA channel ... “Polarization Division Multiple Access With Polarization Modulation for LOS Wireless Communications” by Bin Cao, Qin-Yu Zhang, and Lin Jin discusses a potential multiple access and modulation ... algorithm increases only linearly with the number of users. In this algorithm, the different CFOs from different users destroy the orthogonality among training sequences and introduce multiple access...
- 17
- 306
- 0
Tài liệu Exploring Privacy Risks in Information Networks ppt
... privacy-enhancingtechnologies.Information networks serve as the context in which privacy is investigated.Within information networks, the concepts of information ecosystems and con-tamination are introduced. ... different online registers or databases con-taining personal information may be combined by powerful search engines in order to get an apprehension about groups of individuals. In effect, this informa-tion ... and several startups joined in creat-ing Internet products and services. By the beginning of 2000, the Internet wassupporting a great number of popular applications, including typical killer appli-cations...
- 119
- 245
- 0
Tài liệu 2.548 Mạng máy tính – K49 (Computer Networks) ppt
... liên kết (connection-oriented) Kết nối điểm - điểm (point-to-point) và kết nối đa điểm (point-to-multi-point, multipoint-to-multipoint) 1.4. Mô hình tham chiếu và giao thức trên mạng 1.4.1. ... Learning bridge 3.2.3. Thuật toán cây spanning 3.3. Source routing bridge 3.3.1. Pure source routing bridge − Nguyên tắc chung − Thuật toán 3.3.2. SR-TB (Source routing to transparent bridging) ... [5] Jim Kurose, Keith Ross, Computer Networking: A Top-Down Approach Featuring the Internet, Addison-Wesley 2001 [6] J. Eberspaecher, Broadband Communication Networks, Lecture, Technical University...
- 5
- 777
- 10
Tài liệu The OSI Model: Understanding the Seven Layers of Computer Networks ppt
... understanding the details of computer networking.Since the discussion of networking often includes talk of “extra layers”, this paper will address these unofficiallayers as well.Finally, ... Classrooms,e-Learning, and On-site sessions, to meet your IT and management training needs.About the AuthorPaul Simoneau has over 37 years of experience in working with multiple aspects of computers ... founder and president of NeuroLink, Ltd., an international coaching and education com-pany specializing in professional development. NeuroLink’s client list includes Cisco, AT&T, Lucent,...
- 11
- 542
- 0
Tài liệu Cisco AVVID Network Infrastructure: Implementing 802.1w and 802.1s in Campus Networks ppt
... transitions a link to forwarding only if it is a point-to-point link. A point-to-point link is determined when the link is in full-duplex mode. 76736MSTRegionCST 3-8Cisco AVVID Network Infrastructure: ... Network Infrastructure: Implementing 802.1w and 802.1s in Campus Networks 956652About this GuideObtaining Technical AssistanceObtaining Technical AssistanceCisco provides Cisco.com as a starting ... Learning• Forwarding• DiscardingThe 802.1D states disabled, blocking, and listening have been merged into a unique 802.1w discarding state. Note In the Cisco implementation, the name blocking...
- 76
- 655
- 0
Báo cáo khoa học: "EXPERT SYSTEMS AND OTHER NEW TECHNIQUES IN MT SYSTEMS " ppt
... metho- dology by incorporating advanced techniques from software engineering, moving toward third-genera- tion systems by incorporating expert systems, and returning to interactive techniques for ... propose an initial implementation. The expertise to be incorporated in this system includes linguistic, metalinguistic, and extralinguistic knowledge. The system is constructed by combining a "closed" ... taining and upgrading the lingware, even in an admittedly limited second generation CAT system, requires a good deal of expertise. Techniques are now being developed to maintain the linguistic knowledge...
- 4
- 439
- 0
Molecular Biotechnology-Lession 3: Basic techniques in DNA technology ppt
... Denature DNA, 950C, 30s-1min - Annealing, 55-60oC, 1min Step 3: Extension, 70-72oC, 30s-1min Go to step 2, 32 cycles Step 4: Holding, 4oC, 0s Steps programmed in PCR
- 62
- 415
- 1
Báo cáo khoa học: "PARALANGUAGE IN COMPUTER MEDIATED" ppt
... of paralinguistic code structure in computer conferencing. Moreover, the findings do not suggest that a clear code exists for the community of users. Rather, the code appears to be in a stage ... determining usage. The findings serve more to define questions for subsequent study than to provide answers about user variations. In addition, It is clear that the characteristics of the computer ... tonal and expressive informa- tion. Second, it is not easy to communicate this information. Users must work in computer conferencing to communicate information about their feelings and state of...
- 4
- 158
- 0
Báo cáo hóa học: " A new and efficient adaptive scheduling packets for the uplink traffic in WiMAX networks" ppt
... SS (uplink traffic) and in the BS (downlink anduplink traffic). However, in this study, it is beingaddressed the scheduling packets for the uplink traffic in the BS.The uplink scheduling is ... environments, minimizing the averagedelay according to the MCSs used in the PHY. Thisalgorithm also interacts with the polling mechanism,adapting the polling interval, and guaranteeing the mini-mal bandwidth ... isless complex than the one described in [18]. In [19], it was defined an analytical technique forobtaining an optimal polling interval. Using this pollinginterval, the BS should poll the SSs...
- 11
- 372
- 0
Báo cáo hóa học: "Research Article Particle Swarm Optimization for Adaptive Resource Allocation in Communication Networks" pptx
... particles in the algorithm. The training process could be p erformedmanually by observing the behaviour of the particles in aspecific system or using artificial intelligence techniques suchas neural networks ... nodeselection process in an ad hoc network with 50 nodes.Both techniques are simulated and the gain of trainingthe particles is demonstrated in relation to nontrainedalgorithm. In Table 2 we introduce ... channel gain in the RDlink are chosen using similar method to that just described.However, the solution space will only contain the channelgains profile of the RD link described as following:S=hRD1ej∅2,hRD2ej∅2,...
- 13
- 320
- 0
Báo cáo hóa học: "Research Article A Decentralized Approach for Nonlinear Prediction of Time Series Data in Sensor Networks" pptx
... promisingsubject for research.References[1] M. Rabbat and R. Nowak, “Distributed optimization in sensor networks, ” in Proceedings of the 3rd International Symposiumon Information Processing in ... dynamic fields.Online optimization of this criterion by adding or removingkernel functions from the dictionary also seems interesting.Finally, in a broader perspective, controlling the movementof ... of the training set, making them unsuitablefor online applications. Therefore, it was essential to firstpropose a mechanism for controlling the increase in themodel order as new input data...
- 12
- 531
- 0
báo cáo hóa học:" Decentralized estimation over orthogonal multiple- access fading channels in wireless sensor networks-- optimal and suboptimal estimators" ppt
... communication SNR levels. Itis interesting to see that using more training symbols does not improve the performance of the MLE asexpected, because inserting training symbols will reduce the energy ... first inequality in (76) and t he second inequality in (77) are satisfied. From the conditionf(θ)(θ − Φ) < 0, it is not hard to find that the second inequality in (76) and the first inequality in ... Furthermore, since the estimation quality of the first stage is available, we use BLUE to obtainˆθ for exploiting the quality information instead of using the MLE in the M-step as in the standard...
- 35
- 410
- 0
Tìm thêm: xác định các mục tiêu của chương trình xác định các nguyên tắc biên soạn khảo sát các chuẩn giảng dạy tiếng nhật từ góc độ lí thuyết và thực tiễn khảo sát chương trình đào tạo của các đơn vị đào tạo tại nhật bản khảo sát chương trình đào tạo gắn với các giáo trình cụ thể xác định thời lượng học về mặt lí thuyết và thực tế tiến hành xây dựng chương trình đào tạo dành cho đối tượng không chuyên ngữ tại việt nam điều tra với đối tượng sinh viên học tiếng nhật không chuyên ngữ1 khảo sát thực tế giảng dạy tiếng nhật không chuyên ngữ tại việt nam nội dung cụ thể cho từng kĩ năng ở từng cấp độ xác định mức độ đáp ứng về văn hoá và chuyên môn trong ct phát huy những thành tựu công nghệ mới nhất được áp dụng vào công tác dạy và học ngoại ngữ mở máy động cơ lồng sóc mở máy động cơ rôto dây quấn các đặc tính của động cơ điện không đồng bộ đặc tuyến mômen quay m fi p2 động cơ điện không đồng bộ một pha thông tin liên lạc và các dịch vụ chỉ tiêu chất lượng theo chất lượng phẩm chất sản phẩm khô từ gạo của bộ y tế năm 2008 chỉ tiêu chất lượng 9 tr 25