Please use this identifier to cite or link to this item: https://dspace.upt.ro/xmlui/handle/123456789/3994
Title: Optimal algorithms for scheduling uplink users transmissions in CDMA systems [articol]
Authors: Zoican, Roxana
Galaţchi, Dan
Subjects: Scheduling
Uplink
Reverse link
CDMA
SIR
"Strong" users
"Weak" users
Issue Date: 2004
Publisher: Timişoara : Editura Politehnica
Citation: Zoican, Roxana. Optimal algorithms for scheduling uplink users transmissions in CDMA systems. Timişoara: Editura Politehnica, 2004
Series/Report no.: Buletinul ştiinţific al Universităţii „Politehnica” din Timişoara, România. Seria electronică şi telecomunicaţii, Tom 49(63), fasc. 1 (2004), p. 362-366
Abstract: Early work on capacity analysis of CDMA systems promise a large increase in cellular capacity when compared to other multiple-access techniques. The uplink capacity is shown to be limited by the outage probability. In this work, we consider the problem of optimal scheduling of uplink user transmissions in a single CDMA cell. We assume that the system operates in a TD/CDMA manner, with time-slotted scheduling of transmissions, assisted by periodic feedback of channel and/or congestion information through control channels. The major observation arising from our analysis is that it is advantageous on the uplink to schedule “strong” users one-at-a-time, and “weak” users in larger groups. This contrasts with the downlink where one-at-a-time transmission for all users has shown to be the preferred mode in much previous work.
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