error control techniques in computer networks

Ngày tải lên: 22/06/2014, 22:20

... for this scope. In addition, we presented the main solutions for error control in unicast environments. We presented important error control techniques operating at the DLL, since all transport ... delivered data is in order, without error and without any segment lost or duplicated. Reliability in TCP is obtained by using error control mechanisms, which may include techniques for detecting corrupted, ... packet transmitted in mini-cycle i is received in mini-cycle (i+1) and increases cwnd by one MSS. Further- more, ACKs for consecutive packets released in mini-cycle i arrive in intervals corresponding the service...

Ngày tải lên: 26/10/2013, 17:15

... reproduction in any medium, provided the original work is properly cited. In the past decade, a significant progresshas been reported in the field of error control coding. In particular, the innovation ofturbo ... ambiguities in each observation interval. A nov el approach for enhancing decoder performance in presence of trapping sets by introducing a new concept called trapping set neutralization is proposed in ... improving performance of LDPC codes in the presence of trapping sets” by E. Alghonaim et al. The effect of a trapping set can be eliminated by setting its variable nodes intrinsic and extrinsic...

Ngày tải lên: 21/06/2014, 23:20

... Pipetting errors arise from differences in cell number, gel loading and antibody detection, while blotting errors are caused by inhomogeneities of the gel or the blot. Eliminating correlated errors ... randomized sample loading To determine steps predominantly contributing to the error obtained by quantitative immunoblotting analy- sis, we monitored a time-course of erythropoietin (Epo)-induced activation ... determine the noise inherent in this technique, the signal strength was plotted vs. estimated error and was described by a sublinear function showing a 20% error for each data point within our...

Ngày tải lên: 19/02/2014, 07:20

Ngày tải lên: 24/03/2014, 20:22

... main types of bleaching methods in use are so-called ECF (Elemental Chlorine Free i.e. when no molecular or gaseous chlorine is dosed in the bleaching) and TCF (Totally Chlorine Free) bleaching. ... bleaching agents and selectivity is better in the bleaching stage than in cooking and oxygen delignification. TCF bleaching requires a low incoming Kappa for the pulp (10 - 12) to attain full ... site. That is to say, the activities involved in pulping and recovered paper processing and those involved in papermaking may be undertaken separately or in combination on the same site. Both pulp...

Ngày tải lên: 01/04/2014, 00:20

... integration, is undefined. If the integration interval a ~ b includes the integration of over this interval is 1 ; if lies outside of the integration interval, the integration of over the interval is ... “head” in the coin-throwing wins the grand prize. In this game, the random “event” of interest is “winning the grand prize.” This event would “occur,” if the trials produce the following outcomes: ... its destination with error, the receiving terminal would send the sending terminal a negative acknowledgement and the sending terminal would retransmit the packet. The capability of retransmitting...

Ngày tải lên: 01/06/2014, 12:38

... in Fig. 3, the number of vehicles in the transmission range L i increases up to L i /S with the increase of I and remains at the value. By taking an integral of the area in Fig. 3 for given input ... vehicular internet access using in situ Wi-Fi networks, in Proc. ACM MOBICOM 2006, September 2006 [11] Z Zheng, Z Lu, P Sinha, S Kumar, Maximizing the contact opportunity for vehicular internet ... internet access, in Proc. IEEE INFOCOM 2010, March 2010 [12] N Banerjee, M Corner, D Towsley, B Levine, Relays, base stations, and meshes: enhancing mobile networks with infrastructure, in Proc. ACM...

Ngày tải lên: 18/06/2014, 22:20

... problem of joint sche- duling and rate control in single-hop wireless networks under the objective of minimizing the required time to deliver all data traffic to the intended destinations. First, we ... interested in obtaining optimal policies that take joint scheduling and rate control deci- sions under the objective of minimizing the (expected) time to deliver all data to the intended destinations. ... by formulating the minimum-length scheduling problem as finding a shortest path on a single-source directed acyclic graph. However, finding the shortest paths is computationally hard since the...

Ngày tải lên: 20/06/2014, 22:20

... planning for cellular networks with cooperative relays [1], considering the randomness of channel gains between three types of links formed in cooperative relaying as shown in Figure 1. In cooperative ... satisfying a minimum rate constraint for each user. The problem was formulated as an integer programming problem and a continuous-relaxation- based suboptimal solution method was studied. In [4], ... p s  ·  ((2 ρ(y) −1)/β(y)p r ) 0 F G sd  2 ρ(y) −1 β(y)p s − p r p s ·x  · f G rd (x)dx. (8) 3. Minimization of Dropping Ratio We find the maximum y that satisfies a dropping ratio constraint by solving the following simple problem (P). 3.1. Problem Formulation. We have the following: (P)...

Ngày tải lên: 22/06/2014, 00:20

Ngày tải lên: 22/06/2014, 06:20

Ngày tải lên: 22/06/2014, 22:20

Ngày tải lên: 22/06/2014, 22:20

Ngày tải lên: 29/06/2014, 09:20

Ngày tải lên: 06/07/2014, 15:27

... truyền tin, sẽ có một nguồn phát hay nguồn tin(information source) mà nguồn phát này phát ra thông tin dưới một vài hình thức, và một nguồn thu hay nguồn nhận (information sink) thu về thông tin. ... sách “Principles of Digital Communication Systems and Computer Networks của nhóm em. Phần I – Các hệ thống truyền thông số (Digital Communation System) Chương 2: Lý Thuyết Thông Tin (Information ... truyền thông tin là kết nối trung gian giữa nguồn thu và nguồn phát.Mục đích của một hệ thống truyền tin là để truyền tin từ nguồn đến đích mà không có lỗi. Tuy nhiên, sự truyền thông tin luôn luôn...

Ngày tải lên: 18/09/2012, 10:13

... comparing the consistency between the new design and a routine control selection design in a large case -control study that was incorporated into a nationwide mortality survey in China in 1989–1991. ... recall bias affecting assessment of smoking habits in the cases should similarly affect assessment of smoking habits in the control group, 1 however, insisting on a dead control group violates ... use on smoking-related cancer deaths in Chinese adult men. We also offer specific suggestions that we believe are useful in choosing controls within the framework of the study principles. SUBJECTS...

Ngày tải lên: 26/10/2012, 09:48

... sending large packets get more l cost of flow classification Queue Management 3 Improving QOS in IP Networks o IETF groups are working on proposals to provide better QOS control in IP networks, ... policing) o More details in Network Calculus course Queue Management 2 Contents o Principles o Traffic shaping l leaky bucket l token bucket o Scheduling strategies l FIFO l Priority l Round Robin l ... Queue Management 20 Fair Queueing o Round robin "bit per bit" l each packet marked with the transmission instant of the last bit l served in the order of instants flow 1 flow 2 flow 3 temps ...

Ngày tải lên: 06/04/2013, 11:05

... tin tư liệ u. - 22 - 1.3. Kinh nghiệm về chiến lược Marketing du lịch của các nước 1.3.1. Chương trình chiến lược Marketing du lịch hiện đại: Qua thời gian, quan điểm của Marketing ... 11 1.3 Kinh nghiệm về chiến lược Marketing du lịch của các nước 12 1.3.1 Chương trình chiến lược Marketing du lịch hiện đại 12 1.3.2 Kinh nghiệm thực hiện chiến lược Marketing du lịch ... lược Marketing không có yếu tố tình cảm sẽ không hiệu quả. BỘ GIÁO DỤC & ĐÀO TẠO TRƯỜNG ĐẠI HỌC KINH TẾ THÀNH PHỐ HỒ CHI MINH LÊ MẠNH HÀ ĐỊNH HƯỚNG CHIẾN LƯỢC MARKETING DU...

Ngày tải lên: 08/04/2013, 17:02