One of the more challenging aspects of spectrum management is ensuring the timely and orderly transition of frequencies where they are awarded to a new licensee. Where the frequencies are being used by incumbents to provide services, and there are no alternative providers or technologies available for end-users, it is particularly important to develop a[…]
It is a well-known scientific fact, but one that is sometimes ignored, that radio waves do not respect borders between countries and geographic regions. This means that radio networks deployed in one country or region can cause interference to networks deployed across the border. The impact of the interference can vary considerably and in the[…]
Plum was engaged by a leading fibre network telco operator in the UK, to review the threats and opportunities brought with developing wireless technologies such as fixed wireless access, mesh networks, and cellular systems including 5G. Our work included a review of both technology and commercial developments in the UK wireless market, and a corresponding[…]
Google developed a computer interface system based on hand/motion sensing radar operating in the 60 GHz band. Facebook have concerns that the use of such devices might cause interference to wideband data transmission systems operating in the same band (e.g. Wi-Gig). Plum were commissioned to review the technical studies on the issue, and draft a[…]
Plum assisted CITC with the award of spectrum in the 2300 MHz, 2600 MHz, and 3400 MHz bands. Having cleared this spectrum for IMT use in Saudi Arabia, CITC wished to award this to operators so that they would be able to commence rollout of 5G services and increase capacity of LTE networks. Plum worked[…]
For the Australian Department of Communications and the Arts, Plum analysed technical conditions influencing spectrum sharing in the 26 GHz band between satellite services and mobile broadband including review of inputs into the WRC-19 process. Plum undertook a review of key sharing constraints proposed by the satellite operator and associated parameters, and assessed proposed technical[…]
Digital platforms deliver digital services such as e-commerce, social media, and a wide variety of cloud-based services. Until very recently digital platforms were virtually unregulated, but now it is recognised that the rise of these platforms has also created problems. There is now a growing consensus that this should change – specifically how should digital[…]
Richard Rudd was the lead author for a paper on the development of the new ITU-R model for building entry loss. This paper describes the derivation and form of the new model and highlights work that remains to be done in this area. The ITU-R has recently published a new recommendation giving a method for[…]
Richard Rudd was the lead author for a paper on measuring clutter loss and building entry loss. The paper found that models and measurements exist for building entry loss and for loss due to local clutter. However, there appears to be less information on the combined effects of the two mechanisms. The paper reports on[…]
Richard Rudd, along with Maziar Nekovee of the University of Sussex, authored a paper on the propagation of millimetre-wave frequencies in urban clutter. The paper describes path loss measurements carried out at 27 GHz in London and Brighton. The primary purpose of the measurement campaign was to provide empirical support for the development of clutter[…]