Hand-off between ultra-wideband cell sites

Details Hand-off between ultra-wideband cell sites Hand-off between ultra-wideband cell sites

G - Physics

01

S

G01S 13/87 (2006.01) H04B 1/10 (2006.01) H04B 1/69 (2006.01) H04B 17/00 (2006.01) H04L 1/08 (2006.01) H04L 1/18 (2006.01) H04L 1/20 (2006.01) H04Q 7/20 (2006.01) H04Q 7/38 (2006.01) H04Q 7/34 (2006.01)

Patent

CA 2431112

Briefly, the present invention provides a dynamic channel re-assignment capability between mobile units (70), base stations (10) and sectors (1, 2, 3, 4, 5) within base station coverage areas (20). The wireless devices used in the present invention may include impulse radio communication devices such as, for example ultra-wideband radio (also known as digital pulse wireless) communication devices. Ultra-wideband bandwidth and channel allocation can be effectively managed, even though link quality generally deteriorates near the outer boundary of the base station. By maintaining dual communications with an adjoining base station, the present invention reduces the bit error rate and maintains signal strength (e.g., RF signal strength). This procedure is termed a "soft-handoff".

L'invention concerne une capacité de réaffectation dynamique de voies entre des unités mobiles (70), des stations de base (10) et des secteurs (1, 2, 3, 4, 5) dans des zones de couverture (20) de station de base. Les dispositifs radio mis en application par l'invention peuvent consister en des dispositifs de radiocommunication par impulsions, tels que, par exemple, des dispositifs de radiocommunication à bandes ultralarges (connus également en tant que dispositifs de radiocommunication par impulsions numériques). Il est possible de gérer efficacement la largeur de bandes ultralarges et l'affectation de voies, même si la qualité de la liaison se détériore généralement à proximité de la limite extérieure de la station de base. Le maintien de doubles communications avec une station de base contiguë permet de limiter le taux d'erreurs binaires et de conserver la force du signal (par exemple, force de signal RF). Ce processus est désigné "transfert doux".

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