VoIP Enabled Femtocell with a USB Transceiver Station
First Claim
1. A universal serial bus transceiver station comprising:
- a universal serial bus port;
a universal serial bus controller coupled to the universal serial port, for managing signals entering and exiting the universal serial bus port;
a public land mobile network synchronization unit in communication with the universal serial bus controller for maintaining a timing between the universal serial bus transceiver station and a clock not contained within the universal serial bus transceiver station;
a radio-frequency front end for processing received and generating radio-frequency signals; and
an antenna for receiving and transmitting the radio-frequency signals.
2 Assignments
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Accused Products
Abstract
Telephone calls between a mobile station (MS) and the mobile network or PSTN are routed through the Internet via VoIP using a femtocell, as opposed to the traditional macrocellular network. The femtocell can comprise a USB Transceiver Station that is connected to a personal computer through a universal serial bus port, which provides both power and a multi-megabit per second connection between the personal computer and the USB transceiver station. The USB transceiver station can comprise a microcontroller to manage signaling between the RF front end/baseband processor and the personal computer, as well as a precise timing mechanism to assist the synchronization of femtocell timing with the surrounding macrocellular network, if it is present. The USB transceiver station can have a compact form factor that that facilitates a high degree of portability by the subscriber, such as being readily attachable to their keychain.
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Citations
20 Claims
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1. A universal serial bus transceiver station comprising:
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a universal serial bus port; a universal serial bus controller coupled to the universal serial port, for managing signals entering and exiting the universal serial bus port; a public land mobile network synchronization unit in communication with the universal serial bus controller for maintaining a timing between the universal serial bus transceiver station and a clock not contained within the universal serial bus transceiver station; a radio-frequency front end for processing received and generating radio-frequency signals; and an antenna for receiving and transmitting the radio-frequency signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A femtocell system for coupling mobile phone signals with voice over internet protocol messaging, having a processor for executing modules, the system comprising:
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a voice over internet protocol client module for sending registration messages for the femtocell system and for maintaining network address transport bindings; and a software defined radio module for communicating with the voice over internet protocol client module, for processing and generating digital radio baseband signals, and for measuring received signal strength of digital radio based band signals in a predetermined frequency range. - View Dependent Claims (11, 12, 13, 14)
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15. A computer-implemented method for coupling mobile phone signals with voice over internet protocol messaging comprising:
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identifying an allowed frequency range of a femtocell system; determining an address of a voice over internet protocol server for establishing communications with the femtocell system; scanning the allowed frequency range of the femtocell system to measure received signal strength; calculating a transmission power level of the femtocell system based upon the received signal strength; and receiving timing signals with the femtocell system. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification