摘要:
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.
摘要:
The present invention provides a method of operating a first base station router. The method may include transmitting state information associated with at least one inactive mobile unit to at least one second base station router. The state information is usable to initiate an active session with the at least one inactive mobile unit. The first base station router retains the state information for initiating an active session with the at least one inactive mobile unit and the least one second base station router is capable of initiating an active session with the at least one inactive mobile unit based on the state information when the state information is unavailable to the first base station router.
摘要:
The present invention provides a method of operating a first base station router. The method may include transmitting state information associated with at least one inactive mobile unit to at least one second base station router. The state information is usable to initiate an active session with the at least one inactive mobile unit. The first base station router retains the state information for initiating an active session with the at least one inactive mobile unit and the least one second base station router is capable of initiating an active session with the at least one inactive mobile unit based on the state information when the state information is unavailable to the first base station router
摘要:
The invention includes methods and apparatuses for supporting mobility management and packet routing in ad hoc wireless networks. A method for mobility management includes detecting, at a first base station, a request by a wireless device to establish an association with the first base station where the first base station comprises a mobile base station, updating an association table of the first base station to include an association of the wireless device to the first base station, and propagating, toward a second base station, a message adapted to update an association table of the second base station, wherein the second base station is a mobile base station, wherein the message is propagated toward the second base station wirelessly. The packet routing functions of the present invention may be used independent of, or in conjunction with, the mobility management functions of the present invention.
摘要:
The present invention provides a method for implementation in a first mobile unit that supports an air interface with a network element. The method includes determining, while the first mobile unit is participating in a call, that at least one channel associated with the air interface is unable to support voice transmission. The method also includes rendering a first user-detectable signal in response to determining that said at least one channel is unable to support voice transmission.
摘要:
The invention includes methods and apparatuses for supporting mobility management and packet routing in ad hoc wireless networks. A method for mobility management includes detecting, at a first base station, a request by a wireless device to establish an association with the first base station where the first base station comprises a mobile base station, updating an association table of the first base station to include an association of the wireless device to the first base station, and propagating, toward a second base station, a message adapted to update an association table of the second base station, wherein the second base station is a mobile base station, wherein the message is propagated toward the second base station wirelessly. The packet routing functions of the present invention may be used independent of, or in conjunction with, the mobility management functions of the present invention.
摘要:
The present invention provides a method for implementation in a first mobile unit that supports an air interface with a network element. The method includes determining, while the first mobile unit is participating in a call, that at least one channel associated with the air interface is unable to support voice transmission. The method also includes rendering a first user-detectable signal in response to determining that said at least one channel is unable to support voice transmission.
摘要:
Described herein is a method and apparatus for transmission that provides the performance of space time spreading (STS) or orthogonal transmit diversity (OTD) and the backwards compatibility of phase sweep transmit diversity (PSTD) without significantly degrading performance in additive white guassan noise (AWGN) conditions using a transmission architecture that incorporates STS/OTD and a form of phase sweep transmit diversity (PSTD) referred to herein as biased PSTD, which involves transmitting a signal and a frequency swept version of the same signal over diversity antennas at different power levels to reduce the depths of nulls normally seen in AWGN conditions when regular PSTD is utilized.
摘要:
Techniques for use in designing, adjusting or operating a wireless network so as to provide a desired level of performance for the network. An optimization process is applied to a set of information characterizing the network. The optimization process is implemented as a multi-stage process which includes at least a frequency assignment stage and a post-frequency-assignment optimization stage, wherein the frequency assignment stage and the post-frequency-assignment stage are subject to iteration. For example, after an initial assignment of the frequencies in the frequency assignment stage, the post-frequency-assignment optimization stage may be performed, and based on the result of the optimization, at least one of the frequency assignment stage and the post-frequency-assignment optimization stage may be repeated. An output of the optimization process is utilized to determine one or more operating parameters of the wireless network, such as a base station transmit power or antenna orientation. The optimization process in an illustrative embodiment may be implemented as a three-stage process which includes a pre-frequency-assignment optimization stage, the frequency assignment stage and the post-frequency-assignment optimization stage, with one or more subsets of these stages being implemented in an iterative manner.
摘要:
Described herein is a method and apparatus for transmission that provides the performance of space time spreading (STS) or orthogonal transmit diversity (OTD) and the backwards compatibility of phase sweep transmit diversity (PSTD) without degrading performance of either STS or PSTD using a symmetric sweep PSTD transmission architecture. In one embodiment, a pair of signals s1 and s2 are split into signals s1(a) and s1(b) and signals s2(a) and s2(b), respectively. Signal s1 comprises a first STS/OTD signal belonging to an STS/OTD pair, and signal s2 comprises a second STS/OTD signal belonging to the STS/OTD pair. Signals s1(b) and s2(b) are phase swept using a pair of phase sweep frequency signals that would cancel out any self induced interference. For example, the pair of phase sweep frequency signals utilize a same phase sweep frequency with one of the phase sweep frequency signals rotating in the opposite direction plus an offset of π relative to the other phase sweep frequency signal. The resultant phase swept signals s1(b) and s2(b) are added to signals s2(a) and s1(a) before being amplified and transmitted.