wireless multiple access protocol in mobile computing

... “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

... 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

... 3) source sink

Ngày tải lên: 28/04/2014, 13:40

... Conclusion is drawn in Section 4. 2. Delegation Protocol with Limits on Reading Times Whenamobilereaderisinanoff-line access situation, we try to limit its reading times. Hence, we propose a protocol that ... occasion. Hence, a mobile reader has been developed in recent years to combine mobile technology with traditional RFID systems, through the integration of reading chips, PDA, and mobile devices, hence mobile ... medium, provided the original work is properly cited. To achieve off-line delegation for mobile readers, we propose a delegation protocol for mobile RFID allowing its readers access to specific tags...

Ngày tải lên: 21/06/2014, 11:20

... 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: 27/06/2014, 15:20

... 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

... 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 ... errors, indoor positioning, and localization in wireless sensor networks (WSNs). The first group of articles deals with the interaction of positioning and communications at different layers of the protocol...

Ngày tải lên: 20/06/2014, 21:20

... incomplete cooperative game theory in wireless networks. In [9, 10], authors used the concept of incomplete cooperative game theory in wireless networks for first time and proposed the G-MAC protocol ... self-organizing and distributed networks as there are no central nodes to assign channel access in sensor nodes. In sensor networks, each node has a direct in uence on its neighboring nodes while accessing ... all these information are not necessarily available in incomplete information game [13]. 2.1. Incomplete Cooperative Game. As we mentioned earlier, energy efficiency of MAC protocol in WSN is very...

Ngày tải lên: 21/06/2014, 17:20

Ngày tải lên: 22/06/2014, 19:20

Ngày tải lên: 23/06/2014, 00:20

Ngày tải lên: 23/06/2014, 00:20

Ngày tải lên: 11/07/2014, 21:20

... Corresponding author: Prof. Francesco INCHINGOLO, Piazza Giulio Cesare – Policlinico 70124 – Bari. E-mail: f.inchingolo@tin.it; f.inchingolo@doc.uniba.it. Tel.: 00390805593343 – Infoline: 00393312111104. ... © Ivyspring International Publisher. All rights reserved Case Report Non-syndromic multiple supernumerary teeth in a family unit with a normal karyotype: case report Francesco Inchingolo 1  , ... found in the supe- rior maxillary bone and mainly in the premaxilla (90-98%) 7 , they are often impacted (88,7%) and are often present in the palatine area 8,9 . The prevalence of multiple...

Ngày tải lên: 25/10/2012, 11:40

... software and information distribution. Initially, almost all of these applications were being used in intranets or in MBONE, and now, there are some Internet service providers providing supports ... number of nodes in the multicast tree can continue to change and multicast tree need to adapt to the movement node (including or excluding of certain forwarding nodes of the tree). In order to ... mechanisms which are used for the handling of sequence numbers in many link-state routing protocols such as OSPF or in the building a spanning tree algorithm. It is enough to ensure that nodes can...

Ngày tải lên: 23/11/2012, 15:03

Ngày tải lên: 31/07/2013, 09:43