Providing quality of service for wireless links: wireless/wired networks

Abstract

Ovcr thc last tcn YCBIS. a numhcr of schcdulinr: dirciolincs have hecn dcvelooed to addrcss the ~roblcm of orovidine 00s euarantces iii I. I I packet-swilchcd nctworks. When one considers the intcgration of wircless links with these nelworks, difficullics arisc in thcir implemcntation bccausc of the relativcly large and time-varying hit error rates of wireless links, due to inipairrncnts that arc difcicult to prcdict. We addrcss this prohlem at the (wirclcss) link level, whcrc wc havc dcvcloped ti link acccss schcme callcd remote-qucuing multiplc acccss. NOMA anpporls thc flexible and cfficient allocation of bandwidth for real-time sessions in a way that allows thc wirclcss link to he scamlessly integrated with a wircd network that supports QoS guarantccs. Wc dcscribc RQMA, and prescnt pcrformancc results.

Performance evaluation of the RQMA-CDMA scheme for multimedia traffic with QoS guarantees

“…Once the packet is created, the MT asks for permission to transmit in the access slot using the S-ALOHA random access technique waiting for permission to transmit. This process is based on RQMA [16].…”

Joint call admission control algorithms: Requirements, approaches, and design considerations

“…[2][3][4][5]. The traditional call admission control algorithms for homogeneous wireless network determine whether or not a user may be admitted into the network.…”

Adaptive QoS for wireless multimedia networks using power control and smart antennas

“…The leftmost value of the right side of (1) is the desired signal and the rest are cochannel interference and noise. The goal of the minimum noise variance criterion is subject to (5) where , then the optimum weight vector that solves the problem described in (5) can be found to be, [20] (6)…”

“…Such a network requires that different users should be provided different qualities-of-service (QoS) to accommodate their distinct service types. There has been considerable attention devoted to this subject, where the term QoS has been used as an epithet for a variety of quality measures, such as packet dropping rate [1], [2], bit-error rate [3], resolution or quantization scale [4], packet delay [1], [5], and [6], bandwidth [3], [6], and [7], or channel quality or signal-to-interference and noise ratio (SINR) [8]. In this paper, the performance index will be the SINR levels [9], [10].…”