Báo cáo hóa học: " Research Article Fair Adaptive Bandwidth and Subchannel Allocation in the WiMAX Uplink" pptx

... in order to solve it. On the contrary, the former is distributed among the BS and the SSs in order to be standard-compliant (the BS allocates aggregate bandwidth to the SSs and these decide the ... subset of the variables withoutlooking at the others. In this work, we suggest (for the particular PMP WiMAX case) the derivation of the jointoptimal rate and subchannel allocation (under fairnessconsiderations), ... required by the upper layer. The iterations of the resulting two-level ﬂow allocation algorithm and the involved signaling are summarized in the following list as well as in Figure 4.(1) The dual...

Báo cáo hóa học: " Research Article Opportunistic Adaptive Transmission for Network Coding Using Nonbinary LDPC Codes" pptx

... to the other nodes in the set (sinks);(2) all sink nodes are within the transmission range of the source;(3) each of the sink nodes has all packets in U butone (they may have received them ... nodecombines together the packets in U(see Section 4 )and broadcasts the resulting packet to sink nodes of the networkgroup. In this paper, we used the DaVinci codes, that is, the nonbinary ... the following:(i) B1= “2 variables fall in the inter val [R/2, R ]and0 variables fall in the interval [0, R/2]”;(ii) B2= “2 variables fall in the interval [0, R/2] and 0variables fall in...

Báo cáo hóa học: " Research Article An Adaptive Channel Model for VBLAST in Vehicular Networks" doc

... calculatedonce at the beginning of the packet and held constant for the duration of the packet. ΔHnrequires the pseudoinverseof the (p× 1) vector s, which can be precalculated and stored, and then multiplying ... approximate the mobile wireless channel. The main parameters in designinga channel model are the heights of transmit and receiveantennas, the position of the surroundings relative to the antennas, the ... Communications and Networkingwhere d is the spacing between the antennas and ψ is the angle of orientation of the array (set to π/2 for broadside and 0 for end ﬁre). For mobile terminals, the surroundingsare...

Báo cáo hóa học: " Research Article Content-Adaptive Packetization and Streaming of Wavelet Video over IP Networks" pot

... transmit the highest protection level, temporal subbandindex, component index, spatial subband index, and blockindex in order to properly deinterleave the data. When inter-leaving is used, the interleaving ... curve as in Figure 3) and the x-axis is the bitrate (including source data bits and FEC protection bits). The dashed line is the original subbanddata without any protection, while the solid line ... packetization and scheduling algorithms are mostly responsible for mitigating the eﬀects of bandwidth variation and packet losses in the network. The packetization and scheduling algorithms aremainly...

Báo cáo hóa học: " Research Article Tree Based Protocol for Key Management in Wireless Sensor Networks" pptx

... remaining of the paper. Each sensor node i, including the base station, maintains the following variables.(i) Fatheri: the father of the sensor in the ﬁnal spanningtree. The base station is the ... acute and must beaddressed adequately and in accordance with the bindingcharacteristics of WSNs. Because of their constraints and their deployment in unattended and hostile environments, the ... Ni)}Kr.(2)(3) The new node declares the source of the ﬁrstreceived message as a father and diﬀuses the followingmessage:{Father,Sn, Si, Ni}Kr.(4) The father node adds the new son node in its...

báo cáo hóa học:" Research Article Convergence Theorems on Asymptotically Pseudocontractive Mappings in the Intermediate Sense" potx

... nonexpansive in the intermediatesense, then T has a ﬁxed point. It is worth mentioning that the class of mappings whichare asymptotically nonexpansive in the intermediate sense contains properly the class ... Yanes and Xu 16, we can obtain Step 7. This completes the proof.Remark 2.3. The results of Theorem 2.2 are more general which includes the correspondingresults of Kim and Xu 17,MarinoandXu5, ... has a ﬁxed point.Moreover, the ﬁxed point set is closed and convex. In this paper, we introduce and consider the following mapping.12 Fixed Point Theory and Applicationswhich implies that y...

báo cáo hóa học:" Research Article Entire Solutions for a Quasilinear Problem in the Presence of Sublinear and Super-Linear Terms" potx

... phenomena, for instance, in the theoryof quasiregular and quasiconformal mappings 1–3, in the generalized reaction-diﬀusiontheory 4, in the turbulent ﬂow of a gas in porous medium and in the non-Newtonianﬂuid ... see, e.g., 8–20 and references therein for more generalnonlinearities in the terms f and g which include the cases considered by them. The principal theorem in 7 considered, in problem 1.1, ... to quasilinear problems whichare relevant in itself and will play a key role in the proof of Theorem 1.1.We begin with the problem of ﬁnding classical solutions for the diﬀerential inequality−Δpv...

báo cáo hóa học:" Research Article Rate Distortion Analysis and Bit Allocation Scheme for Wavelet Lifting-Based Multiview Image Coding" potx

... tosubbands based on their energies) of L and H subbands in terms of average PSNR in the range of 1∼ 2dBand0.2 ∼0.6 dB comparing with the exponential and power models.Figures 7 and 8 show the ... summarizes the scaling factors in the lifting modes. Figure 4 illustrates the reference image viewsused in disparity compensation with DCWL Haar and 5/3types.At the synthesis side, the inverse U and ... similar and highly correlated in general. In the context of multiview image coding, the disparity estimation and compensation can be eﬀectively integrated into the P and U steps. The synthesis...

Báo cáo hóa học: " Research Article Motion Vector Sharing and Bitrate Allocation for 3D Video-Plus-Depth Coding" docx

... cameraconﬁguration.Preprocessing the depth map allows to reduce the number and the size of holes created by the warping [16].Nevertheless, some holes can remain, requiring a last stepof hole ﬁlling, consisting in an interpolation ... this end, for each GOP the bits are allocated takinginto account the ratio of the variances of the pictures in the texture video and the depth map sequence. For the P and the B frames, this variance ... boundaries in the texture and in the depth map are highlighted. Actually, the twovideos describe the same scene with the same point of view.Consequently, the motion contained in the two sequencesis...

Báo cáo hóa học: "Research Article Dynamic Resource Assignment and Cooperative Relaying in Cellular Networks: Concept and Performance Assessment" pot

... d1 and d2,where the RS and MS are located in perpendicular streets.Furthermore, d1is the distance from the RS to the midpointof the crossing and d2is the distance from the midpoint of the ... Θndenotes the angle relative to the normal of the wall underwhich the signal is entering the building at the points closestto the MS, and dn,idenotes the distance to the MS inside the building ... model and the MSs are selected for scheduling at the BS and the RS by a round robin scheduler. In the metropolitan area we additionally utilize the channel awarescheduling in the frequency domain...

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