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QoS provisioning is an important issue in the deployment of broadband wireless access networks. The scheduling scheme is essential to guarantee the QoS requirements of different service classes. WiMAX Orthogonal Frequency Division Multiple Access (OFDMA) system specifies the Orthogonal Frequency Division Multiplexing (OFDM) symbol mapping in a rectangular shape manner. In this paper, we propose a...
The provision of very high data rates in a ubiquitous and fair manner throughout the service area is a great challenge for 4G and beyond-4G wireless networks. Towards that end, the deployment of fixed relays by the operators has become an accepted radio access network concept in various standardization activities including LTE-A and 802.16m. In this paper, we present a fair resource allocation scheme...
This paper presents the effects of applying channel-dependent dynamic scheduling and transport block (TB) assignment that take advantage of a wider transmission bandwidth than that for a component carrier (CC) in OFDMA radio access for the LTE-Advanced downlink At the 3GPP RAN WG1 meeting, independent resource block (RB) assignment of one TB within one CC was adopted. However, gains in dynamic scheduling...
This paper presents a novel distributed framework to decide the spectrum assignment in a primary cellular radio access network. The distributed nature of the framework allows each cell to autonomously decide (by means of machine learning procedures) the best frequencies to use in order to maximize spectral efficiency, preserve quality-of-service, and generate spectrum gaps, so that secondary cognitive...
The IEEE 802.11p/1609 standards specify a suite of communication protocols for vehicular communication networks. A new operational mode, called the WAVE (Wireless Access in Vehicular Environments) mode, is defined to enable communication among high-speed vehicles or between a vehicle and a roadside infrastructure network. In the WAVE mode, a mobile/stationary station uses a combined FDMA/TDMA channel...
In this paper, a low-complexity SDMA-based greedy resource allocation (SGRA) algorithm is proposed for the uplink of IEEE 802.16 MIMO-OFDMA systems taking into account co-channel interference. The objective of SGRA is to allocate resources in the space-time-frequency domain in order to maximize system throughput while guaranteeing QoS requirements of real time services. By performing efficient interference...
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