Downlink admission control strategies for CDMA systems in a Manhattan environment

Knutsson, J.; Butovitsch, Peter von; Persson, Magnus; Yates, Roy D.

doi:10.1109/vetec.1998.686520

Cited by 44 publications

(25 citation statements)

References 5 publications

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“…Study in Reference [33] suggested that the uplink interference target is set as a trade-off between blocking and dropping. Similar ideas were suggested in studies in References [4] and [24], which defined call dropping ten times more costly than blocking.…”

Section: Admission Controlsupporting

confidence: 52%

“…Also, study in Reference [17] suggests guard channels to be used in admission control done during handovers. Study in Reference [24] supported the use of power-based admission control and compared methods of single-cell and multi-cell admission controls. The conclusion was that the gains obtained with the multi-cell admission control did not compensate for the increased complexity.…”

Section: Admission Controlmentioning

confidence: 99%

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Automated optimization of key WCDMA parameters

Hoglund

Valkealahti

2004

Wirel. Commun. Mob. Comput.

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SummaryThis paper validates the feasibility of automated optimization of key wideband code division multiple access (WCDMA) radio resource management parameters using control methods. The parameters are regularly adjusted in order to improve performance. The parameters examined in this study include the total cell transmission power target, the received total interference target, the downlink radio link power maximums, the handover windows and the pilot channel powers. The control was based on expert-defined rules, which applied specific trade-off policies and statistics of poor quality calls, blocking, packet queuing, power and interference levels and terminal measurements to qualify the parameter values. The approach was validated using a dynamic WCDMA system simulator with a deployment of macro and micro cells on a city region. Results on automated optimization of single parameters on cell level and results on simultaneous multi-parameter optimization on cell-cluster level are presented in this paper. The use of the automated parameter optimization methods was shown to result in a significant increase of capacity in comparison to the default parameter settings.

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Section: Admission Controlsupporting

confidence: 52%

Section: Admission Controlmentioning

confidence: 99%

Automated optimization of key WCDMA parameters

Hoglund

Valkealahti

2004

Wirel. Commun. Mob. Comput.

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“…The reference point for the downlink investigations is at the user #j. Therefore, the following relation can be given: (9) In addition to the uplink parameters, the downlink parameters are as follows:…”

Section: Downlink Directionmentioning

confidence: 99%

“…For example, a possible CAC algorithm realization simply checks the load of the cell h against the call admission threshold thr CAC in uplink and downlink (cf. also [5,9,12]):…”

Section: Load Control Algorithmsmentioning

confidence: 99%

“…Soft handover algorithms were extensively studied in the literature because of their importance and impact on overall network performance (see, e.g., [7,10,16,17]). Additionally, load control concepts have been discussed in detail in the literature (see, e.g., [5,9]). However, in most studies, static environments were assumed for the performance evaluation.…”

Section: Introductionmentioning

confidence: 99%

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Intelligent management of radio resources in UMTS access networks

et al. 2003

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QoS‐aware call admission control in wideband CDMA wireless networks

Hassanein

Oliver

Elmallah

2006

Int J Communication

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SUMMARYEfficient call admission control (CAC) technique plays a major role in ensuring the quality of service (QoS) requirements of different traffic classes and achieving flexible radio resource utilization in wideband CDMA system like universal mobile telecommunication system (UMTS). In this paper, we propose a novel QoS-aware CAC framework for radio access in wideband wireless UMTS networks. It features an efficient CAC algorithm coupled with a QoS class-separation mechanism based on the transmitted power of each individual mobile terminal. Three inter-relating components have been introduced to extend a currently existing UMTS uplink admission control scheme. First, we introduce a measurement-based component to calculate the current load of the system; second, this measurement-based component is integrated with a power prediction module to estimate the load increment that the new call will bring into the system; and third, the proposed framework feeds the results obtained to a CAC algorithm with a QoS-enforcing mechanism that gives each class of traffic different treatment based on the QoS requirement of the connections. To the best of our knowledge, ours is a first attempt towards combining the above components into one uplink CAC framework that aims to enhance system performance and to achieve per-class QoS objectives. Simulation results show the major impact on the performance of UMTS which is reflected in increased throughput and lower blocking and dropping.

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Downlink admission control strategies for CDMA systems in a Manhattan environment

Cited by 44 publications

References 5 publications

Automated optimization of key WCDMA parameters

Automated optimization of key WCDMA parameters

Intelligent management of radio resources in UMTS access networks

QoS‐aware call admission control in wideband CDMA wireless networks

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