In this paper, the WCDMA inter-cell interference is carried-out for both, soft and hard handovers. The main parameters used to evaluate the proposed model were the other-cell interference factor and the outage probability. The results of this work allow us to compare any sort of frequency reuse schemes in this spread-spectrum multiple access technique.

To deal with the current spectrum scarcity problem and exploiting the fact that exclusive access through tightly regulated licensing leads to idle spectrum, cognitive radio has been proposed as a way to reuse this underutilized spectrum in an opportunistic manner, i.e., allowing the use of temporarily unused licensed spectrum to secondary users who have no spectrum licenses. To protect the lice...

Observations provide evidence that the licensed spectrum is by far not fully used neither in time nor in space. Cognitive radio, which can sense its environment and location and then alter its frequency, modulation and other parameters so as to dynamically reuse the available spectrum, could break the current spectrum availability bottleneck. The fundamental aspect to the success of such techno...

The problem faced by wireless systems is to find the suitable spectrum bands for the fulfilment of future demands. All of radio spectrum has been allocated different services, user and applications; still it is shown in the observations that the spectrum usage is quite low. Therefore concept of cognitive radio has been used to overcome this problem with the utilisation of spectrum. Cognitive Ra...

Long Term Evolution (LTE) networks offer high capacity and are specified and designed to accommodate small, high performance, power-efficient end-user devices. One limiting factor that influences LTE performance is the interference from neighbouring cells, the so called Inter-Cell Interference (ICI). The investigation of ICI mitigation techniques has become a key focus area in achieving dense s...

Achieving high spatial reuse in ad hoc networks exploiting a spread spectrum physical layer can be quite challenging. Designing a MAC protocol for such systems must take into account the physical layer characteristics. Most existing MAC designs for spread spectrum ad hoc networks perform contention resolution to thin the intended transmissions. This is fundamentally similar to the designs for a...

As the amount of information online continues to grow, a correspondingly important opportunity is for individuals reuse knowledge which has been summarized by others rather than starting from scratch. However, appropriate requires judging relevance, trustworthiness, and thoroughness others' in relation an individual's goals context. In this work, we explore augmenting judgements appropriateness...

Two-tier overlay networks that consist of a conventional macrocell network and femtocell hotspots offer an economical solution for high capacity and extended coverage. However, wireless interference across tiers significantly degrades network performance by restricting spectrum reuse. In this paper, we explore schemes to mitigate cross-tier interference using beamforming in overlay networks. In...

Although in cellular networks full duplex and dynamic time-division duplexing promise increased spectrum efficiency, their potential is so far challenged by interference. While previous studies have shown that self-interference can be suppressed to a sufficient level, we show the cross-link interference for both modes, especially from base station station, remaining challenge multi-cell network...

This paper focuses on efficient utilization of spectrum bandwidth to improve throughput in wireless adhoc networks. As the frequency spectrum is a limited resource for wireless communications and as per the next generation requirements the frequency spectrum becomes a scarce resource, and consequently, its efficient use is of the ultimate importance. To meet with the growing demand, network des...