Saturday, July 19, 2014

if radio signals enter my home,count as trespass against my property?



If my neighbour builds a factory on his property, any pollution, noise, vibrations, dust,smell etc. that affect my property count as trespass.
So,if radio signals enter my home as uninvited, is it committed a trespass against my property?
Rajiv

Sunday, July 13, 2014

VoIP-only mobile phones can now swap calls between Wi-Fi and cellular



We’re still a long way from replacing our traditional 2G networks with all-IP voice calling services, but mobile VoIP pioneer TextNow got a little closer this week. The virtual mobile carrier released an update to its Android phone software that allows calls to move between Wi-Fi and cellular data networks without dropping.
As anyone with a smartphone knows, LTE and 3G data coverage can be fickle, causing your phone to flip flop between multi-megabit speeds and the most constricted of connections as you move through the network. VoIP is particularly sensitive to those big peaks and dips in connection quality.
But by adding Wi-Fi to the mix, phones can select the best wireless network available in any given location, and hand-over between the cellular and Wi-Fi means the phone can move a call to the optimal network mid-conversation.
Image: Shutterstock / Sputanski
Image: Shutterstock / Sputanski
Canadian startup Enflick originally launched TextNow as an over-the-top messaging app, but it decided last year to separate itself from that crowded space by becoming a mobile virtual network operator. Instead of reselling Sprint’s 2G minutes and text messages like other MVNOs, Enflick decided to go all-data, offering IP telephony and SMS services over Sprint’s 3G and LTE networks.
To be honest, TextNow all-IP service isn’t nearly as reliable as a traditional mobile voice plan. When I tested out the service last year, I had a fairly good experience even when making calls over Sprint’s 3G data network. But there was a long delay in setting up calls, and I was testing under optimal conditions: stationary on my home Wi-Fi network or in a dense city network where Sprint’s data networks are most powerful.
But TextNow also doesn’t charge traditional mobile carrier prices. Its baseline plan costs $19 a month and includes 500 MB of data, 750 outgoing minutes and unlimited text messages and incoming calls. According to Enflick CEO Derek Ting, TextNow isn’t designed to replace the traditional Verizon or AT&T voice and data plan. Rather, it’s targeted at a youth market that wants a basic voice service to complement its usual SMS-heavy communications habits.

Thursday, July 10, 2014

Fairwaves and Event Connection provided private GSM coverage during the “Walk of the World”



Fairwaves and Event Connection provided private GSM coverage during the “Walk of the World”, one of the largest festivals in The Netherlands in Aug 2013. We have built a private GSM network that covered the city of Nijmegen for the duration of the whole event. The main objective was to provide a GSM service with 100% service availability that did not depend on incumbent operators.
GSM_VSAT
With over 40,000 people walking and about a million spectators, commercial GSM networks faced a hard time remaining on the air. Key people from security staff, local stages and police were delighted to have a reliable service covering the town, even when the public networks were down. The system provided short number calling for internal calls, which made using the system particularly easy.
The network was deployed in the unlicensed guard band between DECT and the GSM 1800 spectrum. It is opened up for anyone to use for low power GSM applications with transmit power of base stations limited to 200mW and mast heights limited to 10 metres.
Holland_scheme
The main scenario is to use Network in the box (NITB) approach with one base station which suits well for fast roll-out. In some cases central controller with several base station could be used to make coverage better.

Friday, July 4, 2014

Thursday, July 3, 2014

"meadowcells'" Small cells recast for reaching remote communities


"meadowcells'" Small cells recast for reaching remote communities.

This year's Cambridge Wireless Future of Wireless International Conference was heavily focused on the big picture socio-economic issues surrounding '5G' (see separate item), but to achieve progress to universal access and new services, it is important that deployable technologies evolve in the near term. For reaching unconnected communities, small cells - so often associated with hyperdense urban networks - will be important for making a viable business case, often for the first time.
Small cells make it commercially viable to bring broadband mobile coverage to ultra-rural communities, according to Simon Saunders, CTO at consultancy RealWireless (and former chair of the Small Cell Forum). They are not always the right solution - macrocells remain better for covering scattered populations, and it is important to reduce their cost and power too.

But for small villages, community small cells, which Saunder dubbed 'meadowcells', can reduce the daunting cost, for the operator, of covering large numbers of remote, small communities.
"Big cells would work well if people are spread uniformly, but if we use small cells in villages we can do some good things," Saunders said. "It's very much understanding what the shape of the need is and having a suite of solutions."
For meadowcells to become a mainstream option, there will be deployment challenges such as finding backhaul options (including satellite). Operators also need to prioritize rural coverage better, which will sometimes be government-driven, but would also be encouraged by a better business case.
And, of course, that means the cost of the cells needs to come down further - to 10% or less of macrocell cost, the benchmark for many carriers to green-light volume roll-outs, whether urban or rural. RealWireless calculations indicate that the cost of providing coverage to 500m people in remote areas can be made commercially viable by repurposing the metrocells designed for urban areas, and halve the cost per person at this scale, compared with macrocell approaches.
Further advances, particularly in backhaul and its spectrum, will improve the economics further. "Combined with a new generation of satellite technology and associated spectrum for backhaul, costs can be reduced to around one-tenth of the traditional cell cost. Our estimates suggest that such technology could then economically improve mobile service to one billion people worldwide," said Saunders.
The consultancy also announced its 'RealWireless - Wireless for Good' initiative to help support expansion of coverage in remote and rural areas in any part of the world. This will provide funding and pro bono consulting for projects in this area, and the first beneficiary was revealed to be Télécoms Sans Frontières.