wireless multiple access protocols in mobile computing pdf

... extremely large in the case of unconstrained channel access, resulting in a low inherent statistical multiplexing gain. By combining CDMA with PRMA, it is possible to control the access of users ... (P loss ) max in multiples of σ K d Hamming distance d il Interleaving depth d min Minimum Hamming distance e Error correcting capability of an (L, B, e) block code; also 2.718 282 f CAF Channel access ... frequency channels) in GSM MAI Multiple Access Interference MAIO Mobile Allocation Index Offset (for frequency hopping in GSM) MBS Mobile Broadband System MCS-1 Modulation and Coding Scheme 1 (for...

Ngày tải lên: 02/03/2013, 16:59

Ngày tải lên: 27/06/2014, 15:20

... “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 ... fair 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 ... 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...

Ngày tải lên: 21/06/2014, 17:20

... session termination Sends leave message JoinAck JoinReq JoinReq JoinAck Join Reply Join Request Receiver Node Y Join Reply Join Request Downstream node detects a link failure sends JoinReq JoinAck Join ... broadcast joining tables to create and maintain the forwarding group FG. The joining table has the same 2 EURASIP Journal on Wireless Communications and Networking factors. In addition, multicasting ... network. These protocols require each node to maintain one or more table(s) to store routing information. In order to maintain a consistent network view, updates to the routing information tables...

Ngày tải lên: 21/06/2014, 22:20

... Outgoing access list is ________ Inbound access list is ________ Interface __________ Outgoing access list is ________ Inbound access list is ________ Interface __________ Outgoing access ... Telnet to the Internet (host 3). d. Now that the infrastructure is in place, it is time to begin securing the internetwork. Step 5 Secure the Intranet Server a. Host #4 represents an internal web ... telnet to the routers Step 7 Deter Internet Abuse a. There have also been some complaints that employees have been abusing Internet access. They have been accessing sites with questionable content....

Ngày tải lên: 18/01/2014, 05:20

... 3. 0 0.2 0.4 0.6 0 0.2 0.4 0.6 0 0.2 0.4 0.6 Loadingonlink1 Loading o nl ink 2 Loading on link 3 (a) F 1 , boundary of stability region with link 1 in nitely backlogged 0 0.2 0.4 0.6 0 0.2 0.4 0.6 0 0.2 0.4 0.6 Loading on lin k1 Loading ... link 2 Loading on link 3 (b) F 2 , boundary of stability region with link 2 in nitely backlogged 0 0.2 0.4 0.6 0 0.2 0.4 0.6 0 0.2 0.4 0.6 Loading on link 1 L oading o nlin k 2 Loading on link ... 1 Loading on link 1 Loading on link 2 Partial interference Binary interference Stability region of slotted ALOHA (a) p 1 = p 2 = 0.2 0 0.2 0.4 0.6 0.8 1 0 0.2 0.4 0.6 0.8 1 Loading on link 1 Loading...

Ngày tải lên: 21/06/2014, 11:20

Ngày tải lên: 27/06/2014, 00:20

Ngày tải lên: 06/07/2014, 12:20

... discussed, inserting training symbols is a heuristic way to improve the performance. It is shown in the 25 Decentralized estimation over orthogonal multiple- access fading channels in wireless ... communication SNR levels. It is interesting to see that using more training symbols does not improve the performance of the MLE as expected, because inserting training symbols will reduce the energy ... ts in [19], in di cate that the separate source-channel coding scheme is optimal in fading channels with orthogonal multiple- access protocols, which outperforms AF transmission, a simple joint...

Ngày tải lên: 18/06/2014, 22:20

... communication SNR levels. It is interesting to see that using more training symbols does not improve the performance of the MLE as expected, because inserting training symbols will reduce the energy ... first inequality in (76) and t he second inequality in (77) are satisfied. From the condition f(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 obtain ˆ θ for exploiting the quality information instead of using the MLE in the M-step as in the standard...

Ngày tải lên: 20/06/2014, 04:20

... Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2009, Article ID 576217, 2 pages doi:10.1155/2009/576217 Editorial Wireless Access in Vehicular ... safety services, and Internet access. Operating at 5.850–5.925 GHz, WAVE systems adopt orthogonal frequency-division multiplexing (OFDM) and achieve data rates of 6–27 Mbs/s. In WAVE systems, an ... when adopting multiple- input multiple- output (MIMO), smart antenna and beamforming, adaptive modulation, novel network configuration (delay tolerance networks, DTN), effective media access control...

Ngày tải lên: 21/06/2014, 20:20

Ngày tải lên: 23/06/2014, 00:20

... alignment of multimodal inputs, multimodal integration, and language un- derstanding within a single mechanism. The result- ing combined meaning representation (represented in XML) is passed back ... presented on a mobile tablet which supports speech and pen input, includ- ing both pointing and handwriting (Figure 1). Our application task also differs, focusing on search and browsing of a large ... n.s. Input modality preference: During the inter- view, 55% of users reported preferring the pointing (GUI) input modality over speech and multimodal input. When asked about handwriting, most...

Ngày tải lên: 20/02/2014, 12:20

... example. Multiple inheritance permits the two types of information to be separated by isolating them in distinct sub- hierarchies. The question to be resolved in systems em- ploying multiple inheritance ... from one end, changing the remainder, and then replacing the first string. In this section we show briefly how unification, string concatenation, and defensible inheritance combine to permit the ... st~ng-predicste macros, in particular OK, must be defined in order to ester for the ~ range of spelling changes observed in verbal inflee~on. # Class verb_spelling (verb) I !Final_T(<base>,P)...

Ngày tải lên: 20/02/2014, 21:20

... train the students in telematics, techniques of the rapidly growing teleservicing market has been incor- porated utilising an infrastructure to remotely control the mobile robots via the Internet ... find the guidance line from any starting location. - Implementation of methods to follow the lines in a known environment towards the target, despite line crossings and a random starting point. - ... education in system engineering topics, motivated by industrial applications. 79 © 2002 UICEEGlobal J. of Engng. Educ., Vol.6, No.1 Published in Australia INTRODUCTION In industry, engineers usually...

Ngày tải lên: 05/03/2014, 15:20

... E KU,V (t 5 +1) Three Phases in Single-Realm Kerberos J. Wang. Computer Network Security Theory and Practice. Springer 2009 Phase 2 Server sends the following information to the client: 1. ... public-key encryption (to distinguish conventional encryption E)  Should Alice want M to remain confidential during transmission  Send to Bob  After getting this string, Bob first decrypts to ... Springer 2009 Phase 1b: Server Hello Message 1. Version number, V S :  V S = min {V Client ,V}  Highest SSL version installed at server-side 2. Pseudo Random string, r s  32-byte string...

Ngày tải lên: 06/03/2014, 16:20

... 1-58053-727-8 10 9 8 7 6 5 4 3 2 1 TEAM LinG 30 Advances in Mobile Radio Access Networks increase the efficiency of power amplifiers while maintaining linearity. Since the efficiency of the state-of-the-art ... Figure 2.6 PA Consulting’s software radio-based WCDMA base station. TEAM LinG Advances in Mobile Radio Access Networks TEAM LinG TEAM LinG 62 Advances in Mobile Radio Access Networks ... UE-based solution maintains a fully functional GPS receiver in the terminal. This requires the same functionality as described in terminal- assisted GPS, plus additional means for computing the position...

Ngày tải lên: 18/04/2014, 10:43

... I A L Open Access Localization in mobile wireless and sensor networks Monica Nicoli 1* , Sinan Gezici 2 , Zafer Sahinoglu 3 and Henk Wymeersch 4 Accurate localization or tracking of wireless de ... a very large database of RSS fingerprints. Machine learning techniques are employed to extract the location information from online RSS measurements showing promising performance for room-level ... reproduction in any medium, provided the original work is properly cited. al. propose a channel parameter estimator for joint com- munications and positioning systems, using soft infor- mation concerning...

Ngày tải lên: 20/06/2014, 21:20

... it waits for in nite time). In the case of in nite SNR stability refers to queue length being a finite multiple of log(SNR) with probability 1. Since, increasingly large number of bits are being served ... notion, the problem of understanding delay in an information- theoretic setting remains intractable, since n →∞makes all talk of per-bit delay irrelevant. A bit, even if it is in the queue for finite number ... loss in achievable rates as we know less and less information. We further see in Lemma 3 that if we do not know any information, we have to predecide the encoding and decoding rates in the interior...

Ngày tải lên: 21/06/2014, 23:20

Ngày tải lên: 22/06/2014, 06:20