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 Benefits to CarriersBenefits to Subscribers Carrier FAQ Mobile Carrier Login |
Carrier FAQ Q: What exactly is Cel-Fi?A: Cel-Fi is a self-configuring, environmentally aware, indoor coverage system. The system consists of two devices. The Window Unit (WU) is placed in the area with the strongest received signal from the carrier network (signal levels as low as -110 dBm are acceptable). The WU comprises a transmitter and receiver which communicates with the cell tower. The Coverage Unit (CU) is placed in the center of the home, communicates wirelessly with the WU and "lights up" the interior of the house with significantly enhanced signal levels, thus enabling better quality calls and greater data throughput. Q: What is Intelliboost? A: Intelliboost technology ensures that Cel-Fi never impacts the macro network negatively while providing maximum coverage by continuously monitoring the gain and making adjustments so that it never overdrives the base station thereby raising the noise floor. Q: What technologies does Cel-Fi support? A: Initially Cel-Fi supports WCDMA (3GPP Release 6 features). The Company is actively evaluating additional 2G, 2.5G, 3G and 4G technologies. Q: Is Cel-Fi carrier specific? A: Yes, Cel-Fi only operates on the frequencies used by the operator that supplied the unit to the subscriber. Q: Improving the coverage indoors will improve voice calls, but what about data throughput? A: Live network tests conducted by wireless carriers have shown that Cel-Fi can effortlessly improve data throughput rates by 200% to 300%. Q: Will Cel-Fi improve data rates even in areas with adequate voice coverage? A: Cel-Fi can often make significant improvements even in areas with sufficient signal to support stable voice calls. One major limitation to data throughput is the SINR (Signal to Interference and Noise Ratio). For example, using Cel-Fi to create a 5dB improvement in SINR will result in double the data throughput. Q: Experience has shown that repeater products often cause significant degradation to macro network quality. How is Cel-Fi different? A: Cel-Fi uses multiple techniques including automatic gain control, real time path loss analysis, and uplink signal gating to ensure that it never degrades the quality of the macro network signal or artificially raise the noise floor of the node B. Q: What frequency is used to communicate between the two units (the Window Unit and the Coverage Unit)? A: Cel-Fi uses channels from both the UNII-1 (either 5.15-5.25 GHz OR 5.25-5.35GHz) and the UNII-2 block (5.47-5.725 GHz) to communicate between the Window Unit and the Coverage Unit. Q: How far apart can the Window Unit (WU) and the Coverage Unit (CU) be placed? A: Distances vary depending on the path loss of the walls between the units, but in general an indoor distance of up to 20 meters (66 feet) is common. Q: Does Cel-Fi require any hardware or software to be installed in the macro network? A: No new software or hardware has to be added to the network to support Cel-Fi. Q: Does the end customer need to have a broadband connection? A: No, Cel-Fi does not require a broadband connection. Q: Does Cel-Fi have to be activated or provisioned on the HLR or any other database? A: No, Cel-Fi does not require network activation or provisioning; there is also no need to register an IMSI list of active users. Would you like to learn more about Cel-Fi? Contact us. |
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