Báo cáo hóa học: " Research Article Uplink Cross-Layer Scheduling with Differential QoS Requirements in OFDMA Systems" docx

... arriving periodically, such as T1/E1 and voice over IP without silence suppression. The QoS requirements supported include MinR,MaxR (which is equal to Min R), Max L,andTolJ. In the interested OFDMA ... Then, the uplink scheduling issue in this OFDMA system can be seen as a centralized cross-layer multiaccess queuing system, shown in Figure 1, which is also referred to as...

Ngày tải lên: 21/06/2014, 11:20

... strategies to minimize queu- ing delay for single-user single-carrier systems. Similarly dynamic programming was adopted in [22] for scheduling packets over a time-slotted single-user wireless link. Perhaps the ... algorithm gives the remaining power by w aterfilling while the algorithm presented in [8] gives all the remaining resources to the user with highest mean channel gain value....

Ngày tải lên: 21/06/2014, 11:20

... α q p 1 ω p r 4/p−22/pl    sin l p  θ    sin 2 p  θ, P 2  t, θ, r   q p 1 ω p r −2/q sin p  θF  r 2/p sin p  θ, t  Φ q  r 2/q Φ p  ω sin  p  θ   q p 1 ω p r −2/q sin p  θe  r 2/p sin p  θ, t  , 2.12 with  θ ... explained below, and the extension will be denoted by sin p .Definesin p on π p /2,π p  by sin p twπ p − t. Then, we define sin p on −π p , 0 s...

Ngày tải lên: 21/06/2014, 07:20

... Tx is lower semicontinuous. Note that Theorem 1.3 generalizes Nadler’s contraction principle and Theorem 1.2. Most recently, Ciric 4 obtained some interesting fixed point results which extend ... proved without using the concept of Hausdorff metric. Recently, Feng and Liu 2 extended Nadler’s fixed point theorem without using the concept of Hausdorff metric. They proved the following result...

Ngày tải lên: 21/06/2014, 20:20

... in macro blocks with low inter frame velocity. This framework deals only with minimizing perceptual distortion without considering the increase in bit rate. Our initial scheme in [16]embeds the ... data hiding in images: introduc- ing perceptual criteria into quantization based embedding,” in Proceedings of the IEEE International Conference on Acoustics, Speech and Signal Proces...

Ngày tải lên: 22/06/2014, 00:20

... classical Swerling case II with RCS fluctuations fixing during a transmitting pulse and varying independently pulse to pulse. The targets which are assumed independent of each other in the space ... e j(2π/λ)d r sin θ r e j(2π/λ)2d r sin θ r ··· e j(2π/λ)(N−1)d r sin θ r ] T is an N ×1 vector, usually referred to as the receiver steering vector. b(θ r )=[1 e j(2π/λ)d t sin θ t e j(2π/λ)2d t...

Ngày tải lên: 22/06/2014, 06:20

... unidirectional links in AODV have been pro- posed in [17]. However, before explaining these techniques, it is worth pointing out how AODV originally establishes valid routes exploiting unidirectional links. Let ... destination. In fact, examining a specific scenario in which all the possible routes are characterized by an unstable link we found that OLSR performance is poor since it is...

Ngày tải lên: 22/06/2014, 19:20

... is explained in Section 5. Other possible applications regarding femtocell-macrocell coexistence are discussed in detail in [14]. User separation in UL -OFDMA was considered in [15] for interleaved OFDMA ... subcarrier indices of pilots in symbol m within B,aξ estimate for B,whichwill be denoted as  ξ j , can be obtained by performing pairwise correlation between Π m,j in di...

Ngày tải lên: 21/06/2014, 19:20

... First, the throughput for uplink SDMA is much higher than that of SDMA with random scheduling and uplink random access. The through- put gains of uplink SDMA result from scheduling at the base station ... beamform- ing SDMA facilitates its joint designs with scheduling [6–8]. Integrating SDMA and scheduling achieves both the multi- plexing and multiuser diversity gains [6, 8...

Ngày tải lên: 22/06/2014, 19:20

... Dai, Singular Control Systems, vol. 118 of Lecture Notes in Control and Information Sciences,Springer, Berlin, Germany, 1989. 17 N. H. Du and V. H. Linh, “Stability radii for linear time-varying ... 3.47 and t ∈ noting that t 0, Hindawi Publishing Corporation Journal of Inequalities and Applications Volume 2011, Article ID 979705, 27 pages doi:10.1155/2011/979705 Research Article...

Ngày tải lên: 21/06/2014, 05:20