H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 7/00 (2006.01) H04Q 7/38 (2006.01)
Patent
CA 2372564
A soft handoff operation is provided for a first signal transmitted according to a first communication standard (IS-95B) and a second signal transmitted according to a second communication standard (IS-95C). A mobile station (MS) (204) receives the first signal, detects a pilot signal, measures pilot signal strength, and transmits a pilot strength measurement message. When the MS fails to receive a handoff direction message after transmitting the pilot strength message, the MS searches for a detecting presence of a broadcast control channel (BCCH) associated with a type IS-95C cell site (202) and measures a carrier-to-interference ratio of the BCCH. The MS compares the carrier-to-interference ratio to a threshold, and when the ratio is above the threshold, initiates a second communication according to the IS-95C standard, thus initiating a soft handoff operation and allowing cell sites (202, 203) to transmit information according to the IS-95C and IS-95B standards, respectively.
L'invention porte sur le transfert doux d'un premier signal transmis selon une première norme de communication (IS-95B) et un deuxième signal transmis selon une deuxième norme de communication (IS-95C). La station mobile (MS) (204) reçoit le premier signal, détecte le signal pilote, mesure l'intensité du signal pilote et émet un message relatif à cette mesure. Si la MS ne reçoit pas de message de direction de transfert après avoir transmis le message d'intensité du pilote, elle cherche à détecter la présence d'un canal balisé associé à un site de cellule (202) de type IS-95C, puis mesure le rapport porteuse/interférences dudit canal, puis compare ledit rapport à un seuil. Si le rapport dépasse le seuil, elle établit une deuxième communication selon la norme IS-95C et commande un transfert doux permettant aux sites des cellules (202, 203) de transmettre respectivement l'information selon les normes IS-95C et IS-95B.
Chen Jiangnan
Jalloul Louay
Luz Yuda Yehuda
Rotstein Ron
Tenbrook Keith A.
Gowling Lafleur Henderson Llp
Motorola Inc.
Motorola Mobility Inc.
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