This paper deals with the Medium Access Control (MAC) functions applied to a Broadband Wireless Point-to-MultiPoint (PMP) Radio Access System. The communication between the master station and the peripheral stations is based on a TDM/TDMA scheme in downlink/uplink direction: both the downlink and uplink data streams are a sequence of Bursts, each one allocated in a Time Slot of the multiplexing...

In one way or another mobile phones have changed everyone’s life. Mobile communication networks made it possible to be connected and reachable even in the most remote places. A lot of research effort has been put lately in the planning and optimization of mobile networks. Network providers as well as users can only gain in efficiency and usability if the algorithmic optimization community provi...

We report on the development of a Decision Support System (DSS) to plan the best assignment for the weekly promotion space of a TV station. Each product to promote has a given target audience that is best reached at specific time periods during the week. The DSS aims to maximize the total viewing for each product within its target audience while fulfilling a set of constraints defined by the us...

Whereas cellular systems have traditionally adopted single-hop transmissions between the mobile station (MS) and the base station (BS), researchers expect multihop transmission to be utilised in the future. Cellular systems present several challenges, such as channel assignment, which are exacerbated by multimedia service traffic and an increasing number of subscribers. Recently, a clustered mu...

in this paper, downlink resource allocation for a sparse code multiple access (scma) based heterogeneous  cellular networks (hcn) is investigated. the main aim of this paper is to obtain joint power allocation and codebook assignment to achieve the least total system transmit power. in this regard, the proposed objective function is formulated as total transmit power subject to users minimum ra...

We analyze the resource allocation problem for CDMA in a multicell wireless access, by defining an optimization problem for the radio resource assignment, with a twofold aim: first, we try to balance selfish single cell performance with generated interference to surrounding cells; second, we require each Base Station to assign its resources to mobile stations within the cell, by relying only on...

In a multi-channelphotonic dual bus network, each unidirectional bus contains a control channel and several data channels (wavelengths), and each station has n tunable transmitters and nz tunable receivers. Given a set of serving traffic and a set of new traffic requests, the wavelength assignment problem ( ( n , ni)-WAP) is to assign the transmission wavelengths and receiving wavelengths of ea...

This paper proposes a scheme of optimal resource management for reverse-link transmissions in multimedia wideband code-division multiple-access (WCDMA) communications. It is to guarantee quality-of-service (QoS) by resource (transmit power and rate) allocation and to achieve high spectral efficiency by base-station assignment. This approach takes the form of a nonlinearprogramming large-scale o...