Báo cáo hóa học: " Physical layer metrics for vertical handover toward OFDM-based networks" pptx

... RESEARC H Open Access Physical layer metrics for vertical handover toward OFDM-based networks Mohamed Rabie Oularbi * , Francois-Xavier Socheleau, ... Models for Fixed Wireless Applications, IEEE 802.16 Broadband Wireless Access Working Group (2001) doi:10.1186/1687-1499-2011-93 Cite this article as: Oularbi et al.: Physical layer metrics for vertical handover .....

Ngày tải lên: 21/06/2014, 00:20

... bandwidth for the BRUs with expired unicast polling timer, then for the BRUswhichUPIshave been set for; (2) if there are data PDU to be sent out, the SS sets UPI for BRU based on Equations 19 and 20 for ... we perform mathematical analysis for the PA from following viewpoin ts: connection-level QoS performance, queuing performance, and BR efficiency enhancement. 4.1 Connection-leve...

Ngày tải lên: 21/06/2014, 00:20

... is examined to search for this possibility. For the example shown in Figure 5, it is assumed that the subchannels from 1 to 5 are suitable for the session. The value of N slot is five for the target ... for different services simulta- neously. For efficiency, the BS aggreg ates the bandwidth allocated for the connections of the same MS into a traffic burst for transmission bec...

Ngày tải lên: 21/06/2014, 02:20

... distributed freely for any purposes (see copyright notice below). For information about publishing your research in EURASIP WCN go to http://jwcn.eurasipjournals.com/authors/instructions/ For information ... η for 2 and 4 relay networks, respectively. The simulation is performed for different channel realizations considering the transmitted SNR (TSNR) is set to 12 dB. It can be...

Ngày tải lên: 21/06/2014, 23:20

... paper, we propose a cost-based vertical handover decision algorithm that triggers the Vertical Handover (VHO) based on a cost function for WWAN/WLAN integrated networks. For the cost function, we ... GIF must provide the SGSN with information about its WLAN, which is required to calculate the cost for WLAN. Figure 2 shows the flow chart for the proposed vertical handover de...

Ngày tải lên: 21/06/2014, 23:20

... INTRODUCTION Discrete Fourier transform (DFT-) based modulation tech- niques [1] have become increasingly popular for high-speed communications systems. In the wireless context, for exam- ple, for the digital transmission ... other filter banks, such as, for example, in [11]. Another approach would be to apply an appropriate time-domain window (see [12] for an overview) at the trans-...

Ngày tải lên: 22/06/2014, 23:20

... of the network deteriorates the average detection perfor- mance. In fact, for a lager scale network the PU’ssignal is difficult to be detected for those kinds SUs located far from the PU Rx. Figure ... supervised by the Institute for Information Technology Advancement (IITA-2009-C1090-0902-0019). This work was supported by following projects: NSFC (60772021), The Research Fund for the...

Ngày tải lên: 21/06/2014, 00:20

... preproces- sors. Four major layers are used in our context: the physical layer, the link layer, the transport layer, and the application layer. A set of parameters from each layer is collected, preprocessed, ... of change points, in mean and in variance. Results for MWICSS and MWSIC are for a threshold level 2 and window size 128, those for MWWJ are for window size 128. In the...

Ngày tải lên: 21/06/2014, 22:20

... particular with respect to the physical capacity and fit- ness for work of employees. For the occupational physi- cian, the medical assessment is much more straightforward if the physical examination concentrates systematically ... doing certain jobs, and for expert medical reports as to the fitness of persons with chronic disorders or after operations. Therefore, for occupational...

Ngày tải lên: 20/06/2014, 00:20

... Access Control (MAC) and Physical Layer (PHY) Specifications: Higher-Speed Physical Layer Extension in the 2.4 GHz Band, (1999) 17. IEEE Std 802.11e™-2005, IEEE Standard for Information Technology- Telecommunications ... allocation for greedy or bandwidth-hungry applications. 3. Background 3.1 IEEE 802.11 wireless LAN The IEEE 802.11 standard [1] is a set of protocols for the P...

Ngày tải lên: 20/06/2014, 22:20