Method and apparatus for decreasing modem retraining due to...

H - Electricity – 04 – M

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H04M 11/06 (2006.01) H04Q 7/24 (2006.01) H04Q 7/22 (2006.01) H04Q 7/32 (2006.01) H04Q 7/38 (2006.01)

Patent

CA 2185126

Modem throughput across a cellular mobile telephone network is increased by controlling the response of the modem to blank and burst orders. In the case of a power control order, the modem may be made aware of the fact that the channel has not changed. Significant performance gain in terms of channel throughput can then be achieved by avoiding a lengthy retraining procedure. The modem operation may be suspended during the blank and burst order and enabled after the blank and burst order, avoiding an unnecessary retrain procedure during the blanking period. In the case of a handoff, the modem may be directed to immediately perform a retrain procedure rather than wait for the long blanking period to be detected by the modem or the link access procedure.

Augmentation de la capacité d'un modem raccordé à un réseau téléphonique mobile cellulaire par régulation de la réponse du modem à des instructions de neutralisation-salve. Dans le cas d'une instruction de régulation de puissance, on peut signaler au modem que le canal demeure inchangé. On peut ainsi obtenir des gains de rendement importants quant à la capacité du canal en évitant une longue procédure de réapprentissage. Le fonctionnement du modem peut être interrompu pendant l'instruction de neutralisation-salve, puis être activé à la suite de celle-ci, ce qui évite une procédure superflue de réapprentissage pendant la période de neutralisation. Dans le cas d'un transfert, on peut commander le modem de sorte qu'il effectue immédiatement une procédure de réapprentissage, au lieu d'attendre que la longue période de neutralisation soit détectée par le modem ou par la procédure d'accès à la liaison.

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