Spectrum is fundamental to the success of mobile wireless communications. In recent years, it has been difficult to add new spectrum due to incumbent or legacy use. Shared spectrum opens opportunities to unlock additional, currently underutilized, spectrum for mobile broadband, in situations when incumbent or co-primary use does not diminish the value of that spectrum to the mobile operator. This is important because clearing this underused spectrum for exclusive use by the mobile industry would not be possible within reasonable time frames.
5G will integrate new and existing radio-access technologies, rather than be based on a single breakthrough technology, and this will mark the next phase of a radically transformative global process – the connectivity revolution. And while it’s too early to know exactly what 5G will mean for individual players or industries, there is no doubt it will disrupt value chains and enable new opportunities on an unprecedented scale both within and across industries.
The explosive growth of smartphones and app usage bring new challenges to mobile operators. App coverage is an approach to meet those challenges by translating users’ expectations into network performance targets.
As smartphones and tablets became the access devices of choice, mobile user behavior has undergone a fundamental shift from being predominantly voice-centric to data-centric – or, more accurately, app-centric. To provide for this, operators need new ways to assess performance and the quality of the user experience that enables operators to build and manage their networks in the most efficient, targeted and profitable way.
As HSPA evolution continues to address the needs of changing user behavior, new techniques develop and become standardized. This article covers some of the more interesting techniques and concepts under study that will provide network operators with the flexibility, capacity and coverage needed to carry voice and data into the future, ensuring HSPA evolution and good user experience.
5G will enable the long-term Networked Society and realize the vision of unlimited access to information for anyone and anything.
WCDMA/HSPA enables hundreds of millions of people to access mobile broadband (MBB) through their smartphones every day as part of their daily lives. Today, new, low-priced WCDMA/HSPA smartphones are entering the market, and they will enable MBB for new hundreds-of-million-sized markets.
Since the seminal paper by Knopp and Humblet that showed that the system throughput of a singlecel l system is maximized if only one terminal transmits at a time, there has been a large interest in opportunistic communications and its relation to various fairness measures. On the other hand, in multicel l systems there is a need to allocate transmission power such that some overall utility function is maximized typically under fairness constraints. Furthermore, in multicell systems the degree of resource allocation freedom includes the serving cell selection that allows for load balancing and thereby the efficient use of radio resources. In this paper we formulate the joint serving cell selection (link selection) and power allocation problem as an optimization task whose purpose is to maximize either the minimum user throughput or the multicell sum throughput. The max-min problem and a simplified max throughput problem are both NP-hard and we therefore propose heuristic solution approaches.We present numerical results that give new and valuable insights into the trade off between fair and sum throughput optimal joint resource allocation strategies.