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A user may simultaneously be connected to multiple BS’s in CDMA based systems (soft handover). Since soft handover affects the amount of power transmitted by each BS to a certain user, it is necessary to determine whether the UE is served by a single BS or mul...

As far as SEAMCAT is concerned, the actual CDMA power control algorithm looks merely like a black box that maps link quality to channel power. However, the mapping is not simply one-to-one. Depending on the conditions of the mobile user, the same link quality ...

The power control loop terminates when every BS broadcast power converges and traffic channel power level for every user is calculated. Therefore, both the BS output power and the success rate for the cell of interest (center cell in Figure 198) can be calcula...

In CDMA networks, closed-loop fast transmit power control (TPC) is supported in uplink. The base station estimates the signal-to-interference ratio (C/I), measured in bit energy-to-noise density ratio ...

The handover model proposed is a simplified soft handover. We assume that all base stations transmit with the same pilot power in downlink. Therefore, PL_fading (path loss plus the shadow fading) is the only criterion for selecting the base stations belonging ...

The voice activity factor is the measure of how long the non-silence period is to the overall time for voice communication as it reflects the fact that speech users are silent or speaking. In SEAMCAT, It is assumed that all connected users are speaking constan...

The following procedures can be used for system loading during simulation and preparation of simulation outputs. System loading To determine the number of active mobile stations Act_MS in the network: Set up:  Average traffic load in terms of a predefined ...

Two conditions are counted as outage. A mobile station, which is not able to transmit the required amount of power to meet the received Eb/N0_target due to maximum power limitations. This mobile is counted as part of the specified traffic load N_UL. However,...

For the CDMA UL, there are two algorithms selectable in SEAMCAT: Recommended algorithm when the interferer is a cellular network or affecting many cells in a network: the noise rise (which is measured per cell) is averaged over the whole network. This way, the...

In CDMA uplink, the capacity is found by gradually filling system with users until a certain average noise rise with the specified threshold noise rise is reached. The Noise rise is measured as the linear average of dB values – across all 19/57 base-stations. ...

In CDMA downlink, the capacity is found by gradually filling system with users while measuring system outage. For every number of users a certain number of trials are run and then the number of “successful” trials is compared to a predefined success criterion....

The current OFDMA module has been designed for a Long Term Evolution (LTE) network from 3GPP ‎[12]. Therefore E-UTRA RF coexistence studies can be performed with Monte-Carlo simulation methodology. The general simulation assumptions are presented in this secti...

Whether you want to simulate OFDMA UL or OFDMA DL, you can import  from the system library (Figure 199 – (a)), the cellular system you want (Figure 199 – (b)). You can also export  the characteristics of your OFDMA network to the library for later re...

See section ‎7.5, common to CDMA and OFDMA on the positioning of BSs and MSs.

A look up table is used to map throughput in terms of spectral efficiency (bps per Hz) with respect to calculated SINR (= C/(I+N)) (dB) level. This link level data (bitrate mapping) is user selectable and can be modified depending on the simulation to perform....

The achieved bit rate is calculated as follows:  (Eq. 45) The achieved aggregate bit rate is calculated over all the mobiles connected to the reference cell.

The relationship between the contributors of the interference in a OFDMA network is illustrated in Figure 205. Figure 205: Illustration of the interference mechanism in the OFDMA module   Figure 205 illustrates the interference mechanism in the OFDM...