Wireless private branch exchange (WPBX) and communicating between mobile units and base stations
First Claim
1. In a wireless communication system comprising a Base Station connected with a mobile unit, a method of synchronizing at least one neighboring Base Station to the Base Station connected with the mobile unit comprising:
- from the Base Station connected with the mobile unit, sending call parameters and rough synchronization information to the at least one neighboring Base Station; and
at the at least one neighboring Base Station, monitoring transmissions of at least one of;
the Base Station connected with the mobile unit;
the mobile unit; and
a beacon signal from a beacon transmitter which is within range of the at least one neighboring Base Station and the Base Station connected with the mobile unit.
3 Assignments
0 Petitions
Accused Products
Abstract
Methods to create a cellular-like communication system, such as a Wireless Private Branch Exchange (WPBX), which includes mobile devices such as standard cordless phones (handsets), particularly, mobile devices utilizing the Bluetooth short-range wireless communication protocol. The methods provide seamless and reliable handoff of sessions between Base Stations while the mobile device is moving between picocells, by implementing a high-level of synchronization between the Base Stations and the Switch. Base Stations of picocells having small coverage areas communicate with the handsets. The communication protocol is divided into a low-level protocol performed by the Base Stations and a high-level protocol performed by the Switch connected to all the Base Stations. The methods support mobile computing or telephony devices and communication protocols, which are not specified to handle handoffs of sessions while moving between Base Stations coverage areas in a data, voice or telephony wireless network.
87 Citations
8 Claims
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1. In a wireless communication system comprising a Base Station connected with a mobile unit, a method of synchronizing at least one neighboring Base Station to the Base Station connected with the mobile unit comprising:
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from the Base Station connected with the mobile unit, sending call parameters and rough synchronization information to the at least one neighboring Base Station; and
at the at least one neighboring Base Station, monitoring transmissions of at least one of;
the Base Station connected with the mobile unit;
the mobile unit; and
a beacon signal from a beacon transmitter which is within range of the at least one neighboring Base Station and the Base Station connected with the mobile unit. - View Dependent Claims (2)
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3. In a wireless communication system comprising a Base Station connected with a mobile unit, a method of detecting and synchronizing with the mobile unit prior to receiving a handoff of a session with the mobile unit, comprising:
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from the Base Station connected with the mobile unit, sending rough synchronization information to at least one neighboring Base Station;
at the neighboring Base Station, performing a wide-range search for “
target”
signals having the correct timing for a mobile unit, based on the rough synchronization information provided by the Base Station which is connected with the mobile unit;
narrowing the search for an actual signal from the mobile unit;
acquiring the target signal; and
synchronizing the neighboring Base Station to the Base Station connected with the mobile unit. - View Dependent Claims (4, 5, 6, 7, 8)
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Specification