Báo cáo hóa học: " Two-dimensional downlink burst construction in IEEE 802 16 networks" ppt

... downlink transmission, i.e., downlink burst construction. 2.2. Burst construction in downlink transmission The downlink burst structure specified by the IEEE 802. 16 standard is based on the downlink- partial usage of ... two-dimensional uplink burst construction in IEEE 802. 16 networks. Comput Stand Interfaces (2011) doi:10.1186 /168 7-1499-2011-173 Ci...

Ngày tải lên: 20/06/2014, 22:20

... clustering 32-32 16- 16 -16- 16 32-8-8-8-8 32 -16- 8-8 32 -16- 16 (b) Figure 7: P e as a function of the sensor SNR, for different clustering configurations, ideal communication links, and the IEEE 802. 15.4 ... 40-8-8-8 Simulations / 16- 16 -16- 16 Analysis / 16- 16 -16- 16 Figure 4: Comparison between analytical and simulation results in a scenario with ideal communication links and t...

Ngày tải lên: 21/06/2014, 11:20

... studied, both in point-to-point and relay communication systems. Typical combining schemes include maximal ratio combining (MRC), equal gain combining (EGC), and selection combining (SC). Since SC ... for coherent communica tions. Since obtaining the channel state information (CSI) in coherent commu- nications might be unrealistic in fast fading environment and in multiple-relay ne tw...

Ngày tải lên: 20/06/2014, 22:20

... Networking 2011, 2011:107 http://jwcn.eurasipjournals.com/content/2011/1/107 Page 16 of 16 consumption using the beacon-enabled and non-bea- con-enabled mode in IEEE 802. 15.4 WSNs. Distinct network ... proposed in IEEE 802. 15.4 proto- col standard. In a star topology, data transmission can from a device to the coordinator or from the coordina- tor to the device (Figure 3) [1...

Ngày tải lên: 20/06/2014, 22:20

... of 16 consumption using the beacon-enabled and non-bea- con-enabled mode in IEEE 802. 15.4 WSNs. Distinct network topologies like star, tree, and chain architec- tures comprising one coordinator ... proposed in IEEE 802. 15.4 proto- col standard. In a star topology, data transmission can from a device to the coordinator or from the coordina- tor to the device (Figure 3) [1]. Fig...

Ngày tải lên: 21/06/2014, 00:20

... node in a dynamic CogMesh environment can be viewed as a reinforcement learning problem [14]. In this section, we briefly explain the reinforcement learning agent in the Network Coding based Intercluster ... which includes the exchanging of control channel messages usually needs four time slots in traditional relaying schemes since all involved nodes operate in half-duplex mode, resu...

Ngày tải lên: 21/06/2014, 20:20

... and detecting game bots in massively multiplayer online role playing games (the seventh paper). In the paper “Detecting network intrusions using signal processing with query-based sampling filter,” ... treatment results in a more robust classification of intrusions, allowing potential discover y of rare (new) attacks. This interesting combination of signal processing and learning techniqu...

Ngày tải lên: 21/06/2014, 22:20

... distributions for the desired link and interfering link, such as the Rayleigh for the channel envelope of the desired link, and Rician for the interfering link, or vice versa. Using (3)and(5), the SIR ... computational complexity involved in solving multiple integrals in SIR computation. But, a major shortcoming of these and other similar papers [7] is that, only the small-scale fading or...

Ngày tải lên: 21/06/2014, 22:20

... increased by adopting a sliding encoding mechanism [22]. The sliding encoding is a UL interleaver mechanism: a UL-FEC encoder implementing sliding encoding selects the k  data columns from a window (SW) ... maintain the original data rate is to introduce in the terminals the capability of storing larger quantities of data, equivalent to the possibility to support multiple H- ARQ processes...

Ngày tải lên: 21/06/2014, 23:20

... UL-MAP contain the correlative information of the intervals’ usage in the following downlink and uplink subframes, respectively, and are broadcast to all SSs. The following downlink bursts carry ... of IEEE 802. 16 MAC. 2.2. Polling-request-grant bandwidth allocation procedure In a PMP network, the BS controls all transmissions in the uplink and the downlink. For uplink access...

Ngày tải lên: 21/06/2014, 23:20