2.5-555M Regen-Superregen - Radio World

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Thus, in the MCBS, more channels become available due to multiple bandwidth signals, and frequency can be reused more closely in a given service region due to different C/I requirements. 16 Chapter 1 Existing cellular systems are expected to evolve from large cells to small cells to cope with the increasing service demand. This type of evolution is the focus of [38], which considers three cell layout scenarios: the first layout has a non-layered cell architecture with macrocells; the second layout has a layered architecture with macrocells and medium-sized microcells; the third layout has macrocells and small microcells.

Chuah [57] proposes an integrated resource management based on four SIR thresholds. The resource management tasks incorporated into the algorithm are admission control, power control, handoff, and channel allocation. , 16 dB for AMPS. The threshold is considered to be the minimum tolerable SIR for an acceptable speech quality. Power control is achieved by a target SIR threshold Each MS tries to attain through power control. Call admission control is performed through a target SIR threshold A new call attempt succeeds only if it can offer an SIR higher than The SIR threshold ensures that the system is not packed too tightly.

Clustering algorithms and fuzzy classifiers are examples of implicit methods. The environment in the region near cell boundaries is unstable, and many unnecessary handoffs are likely to occur. The PR techniques can help reduce this uncertainty by efficiently processing the RSS measurements. 3 Prediction-Based Handoff Algorithms Prediction-based handoff algorithms use the estimates of future values of handoff criteria, such as RSS. Kapoor [65] proposes this technique and shows it to be better than the relative signal strength algorithm and the combined absolute and relative signal strength algorithm via simulations.

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