Abstract: A communication method uses a distributed cell-free network of spatially independent service antennas. According to the method, pilot sequences are allocated to a user population of access terminals by an allocation procedure that imposes local relative orthogonality of pilot sequences. Channel coefficients for access terminals arc determined by measuring allocated pilot sequences as received by each of the service antennas. In embodiments of the invention, the determination of channel coefficients is performed independently and the resulting channel coefficients are locally stored at the respective service antennas. At each service antenna, a processor independently uses locally stored channel coefficients to precode forward link signals or to at least partially decode reverse link signals.

Abstract: Femto base stations and methods described herein suppress the need for an external GPS antenna and cable, while still providing a network service provider with the ability to obtain the desired GPS location coordinates and the user with the flexibility of placing the femto cell at the location of their choice within a home regardless of GPS signal strength.

Abstract: Femto base stations and methods described herein suppress the need for an external GPS antenna and cable, while still providing a network service provider with the ability to obtain the desired GPS location coordinates and the user with the flexibility of placing the femto cell at the location of their choice within a home regardless of GPS signal strength.

Abstract: In the method, positions of a plurality of transmitting sources within a proximity of a base station are determined. A received signal spectrum of signals received at the base station from the plurality of transmitting sources are simulated. Inter-modulation distortion products are estimated based on the simulated signal spectrum. The estimated inter-modulation distortion products may be used in the design of a radio architecture. The simulating step may be repeated a plurality of times until an acceptable solution is found. Base station operating parameters associated with the acceptable solution may be selected for use in a proposed base station.

Abstract: Femto base stations and methods described herein suppress the need for an external GPS antenna and cable, while still providing a network service provider with the ability to obtain the desired GPS location coordinates and the user with the flexibility of placing the femto cell at the location of their choice within a home regardless of GPS signal strength.

Abstract: An exemplary method of confirming authorized use of a microcell base station includes determining that the microcell base station has made a connection with a mobile station. A determination is made whether the mobile station subsequently establishes a connection with a selected macrocell base station. Whether the mobile station successfully makes the connection with the selected macrocell base station is used as an indication of authorized use of the microcell base station.

Abstract: The present invention provides a method of automatically configuring a base station router. The method includes modifying a transmission power for a pilot signal transmitted by the base station router. The modification of the transmission power is determined based upon a frequency of mobility-related procedure requests received by the base station router.

Abstract: The present invention provides a method involving a tamper-resistant module and an authentication server. The method includes receiving, at the tamper-resistant module, information encrypted using a first secret key stored in the authentication server. The method also includes authenticating the authentication server in response to decrypting the information using a second secret key stored in the tamper-resistant module.

Abstract: The present invention provides a method of route optimization for a proxy mobile Internet protocol. The method may include providing information indicative of a first proxy address based on a first address associated with a first access terminal and receiving information indicative of a second proxy address associated with a second access terminal. The method may also include establishing a communication link between the first access terminal and the second access terminal based on the first and second proxy addresses such that the communication link does not include a home agent.

Abstract: The present invention provides a method of route optimization. The method may include obtaining a packet associated with a first address associated, by a home agent, with a first mobile unit and routing the packet to a second address associated with a second mobile unit along a forward link of a communication path that bypasses the home agent.

Abstract: The present invention provides a method for authenticating a mobile unit in a wireless communication system. The method includes accessing information indicative of a random number and of a first key formed using a first cryptographic function. The method also includes forming second and third keys based on the random number, on the first key, and on second and third cryptographic functions that are different than the first cryptographic function. The method further includes transmitting data encrypted using the second and third keys over an air interface.

Abstract: In the method, positions of a plurality of transmitting sources within a proximity of a base station are determined. A received signal spectrum of signals received at the base station from the plurality of transmitting sources are simulated. Inter-modulation distortion products are estimated based on the simulated signal spectrum. The estimated inter-modulation distortion products may be used in the design of a radio architecture. The simulating step may be repeated a plurality of times until an acceptable solution is found. Base station operating parameters associated with the acceptable solution may be selected for use in a proposed base station.

Abstract: In one embodiment of the method, a base station is configured to divide a coverage area of the base station into sub-coverage areas. Each sub-coverage area has a smaller range of round trip propagation delays than a range of round trip propagation delays for the coverage area of the base station. Each sub-coverage area may have a different range of round trip propagation delays.

Abstract: In one embodiment of the method, a base station is configured to divide a coverage area of the base station into sub-coverage areas. Each sub-coverage area has a smaller range of round trip propagation delays than a range of round trip propagation delays for the coverage area of the base station. Each sub-coverage area may have a different range of round trip propagation delays.

Abstract: The wireless communication system includes antennas having electrically controllable downtilt angles and downtilt controllers associated with each antenna. The downtilt controllers receive instructions from a main controller, and adjust the downtilt angles of the associated antennas in accordance with the received instructions.