نتایج جستجو برای: channel allocation
تعداد نتایج: 299166 فیلتر نتایج به سال:
Rex Lee [email protected] Abstract An improved version of stream arbitration based on multiband RF interconnect (MRFI) is proposed. Thanks to the simultaneous multiple channel transmitting/receiving feature of MRFI, dynamic bandwidth allocation is achieved in the proposed arbitration algorithm. With dynamic bandwidth allocation, MRFI based arbitration can guarantee 100% channel bandwidth u...
The Channel allocation is one of the key problems in the design of the wireless network, as it greatly influences the throughput and the performance of the network. We introduce the channel propagation model and put forward to the channel allocation algorithm named OCAA. The OCAA is verified by the experiment, which shows it can converge to a stable optimal point and obtain the better network p...
In this paper, we study resource allocation problem in orthogonal frequency division multiple access multiple-input multiple-output (OFDMA-MIMO) relay systems and formulate the optimal instantaneous resource allocation problem including subcarrier assignment, relay selection and power allocation to maximize system capacity. Based on the assumption that the availability of perfect channel state ...
Wireless USB (WUSB) is the USB technology merged with WiMedia PHY/MAC. WUSB can be applied to WPAN applications as well as PAN applications like wired USB. However the current WUSB protocol can’t provide resource allocation scheme to respond to changes of available resource as well as resource allocation scheme for saturated wireless channel. This problem causes the critical problems in QoS pro...
Large deployment of IEEE 802. 11 wirelesses LANs (WLANs) is perceivable in the present world. In order to reduce interference in the spectrum, the 802. 11 standard specifies the use of several orthogonal channels. It is established that the static channel assignments are inadequate to handle the traffic variations effectively, besides some of the channels being underutilized in these types of n...
This paper studies multiuser orthogonal frequency division multiplexing (OFDM) system using adaptive subchannel and power allocation with partial channel information. Previous research on multiuser OFDM includes margin adaptive (MA) optimization and rate adaptive (RA) optimization. The capacity gain using adaptive resource allocation over fixed resource allocation such as time division multiple...
For cooperative multicast systems using nonorthogonal multiple access, we propose optimal power allocation to maximize the achievable rate, and present its performance analysis in terms of average achievable rate and outage probability assuming Rayleigh fading channels. To perform the optimal power allocation, the source requires instantaneous channel information for a subset of the links. In t...
This paper investigates the performance of an integrated voice/data wireless mobile network where a finite buffer is provided for voice calls since they can endure a tolerable time, or the reneging time, for service. Based on a given humanistic reneging time, we analyze the voice traffic blocking probability. The probability distribution of receiving service within the reneging time is obtained...
Under the scope of improving the network performances in Wireless Mesh Network (WMN), a cross-layer design concerning channel allocation and routing algorithms is needed. IEEE 802.11 standard provides at least three non overlapping channels and thus, the possibility for the network in general and a node in particular, equipped with more than one network interface card (NIC), to operate on diffe...
It is well known that Shannon's separation result does not hold under nite computation or nite delay constraints, thus joint source-channel coding is of great interest for practical reasons. For progressive source-channel coding systems, eecient codes have been proposed for feed forward channels 1] and the important problem of rate allocation between the source and channel codes has been solved...
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