Dynamic cell-size control according to geographical mobile distribution in a DS/CDMA cellular system

Power control for data load balancing with coverage in dynamic femtocell networks

“…In cellular networks, research on load balancing mostly aims at macrocell networks. In the conventional DS/CDMA cellular system, Togo et al [5] estimated the geographical distribution of mobile stations by the signal to interference power ratio and adapted the transmit power according to the density of the distribution. Similarly, cell breathing technology that transfers traffic from heavily loaded BSs to lightly loaded BSs is proposed [6,7].…”

On the Cell Breathing Technique to Reduce Congestion Applying Bandwidth Limitation

“…As the users in a congested cell increase their transmission power, they also increase their interference to the neighbouring cells since all cells use the same frequency band in CDMA networks. As a result, the overall network capacity may decrease [11]. Furthermore, since the maximal transmission power of the users is bounded, the users who are far from the base station may experience poor services.…”

“…In other words, the cell handoff boundary of the reverse link is tighter than that of the forward link. To overcome these problems the cell breathing approach was proposed by Togo et al [11] and Jalali [12], independently. This approach shrinks the cell size of congested cells and balances the forward and reverse link handoff boundaries by reducing the pilot signal transmission power of the corresponding base stations.The technique known as cell breathing in cognitive radio in which we have large number of users, According to Rafiza Ruslan [1] transmission power adjustment which affect the cell boundaries which is decided by the cognitive radio as it has the intelligent capability to decide under what and which conditions transmissions takes place.…”

Dynamic power control for balanced data traffic with coverage in femtocell networks

“…As the amount of data traffic dynamically changes according to time and location, some BSs may convey too much data causing deterioration of communication quality. In the conventional DS/CDMA cellular system, Togo et al [12] estimated the geographical distribution of mobile stations by a signal to interference power ratio and adapted the transmit power according to the density of the distribution.…”