Telefonaktiebolaget Lm Ericsson (Publ)

Anders Sandell

Torbjorn Ward

Daniel Dufour

A neighborhood zone covering an enclosed or surrounded environment, such as a man-made building or high-rise, is defined within a mobile telecommunications network by associating a plurality of base stations with respective cell areas. A same neighborhood list indicating all measurement channels being utilized within the neighborhood zone by said plurality of base stations is then further defined. The defined same neighborhood list is then transmitted by each of the base stations within its respective coverage area. A mobile station traveling within the neighborhood zone then scans and reports measurements from the indicated measurement channels to the serving mobile telecommunications network. The mobile telecommunications network then effectuates a handover in accordance with the received signal measurements. An idle mobile station further utilizes the measurements to effectuate a cell re-selection.

Providing a neighborhood zone within a mobile telecommunications network

A system and method for dynamically adapting the user bit rate of a time division multiple access (TDMA) cellular telecommunication system to achieve optimum voice quality over a broad range of radio channel conditions are disclosed. The system continuously monitors radio channel quality on both the uplink and the downlink, and dynamically adapts the system's combination of speech coding, channel coding, modulation, and number of assignable time slots per call to optimize voice quality for the measured conditions. Various combinations of the system's speech coding, channel coding, modulation, and assignable time slots are identified as combination types and corresponding cost functions are defined. By identifying and selecting the cost function with the lowest cost for the measured radio channel conditions, the system provides the maximum voice quality achievable within the limits of the system design.

Growing community of inventors

Dollard-des-Ormeaux, Canada

Anders Sandell