Method and system for determining access during inter-technologies handoff
AssigneeBlackBerry Limited
InventorsKe-chi Jang, Jun Li, Larry T. Bolen
Life of this patent
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Abstract
A system and method for determining an initial mean open loop power level of a pilot channel of a reverse traffic channel for a mobile terminal. The initial open loop power level enables handoff of an active call from a first access network to a second access network. A handoff initialization request is from the first access network. A mean received power level of the forward link of the second access network is measured and transmitted to the second access network. An open loop power adjustment factor is received from the second access network. The initial mean open loop power level is set based on the open loop power adjustment factor.
Claims19
A method for determining an initial mean open loop power level of a pilot channel of a reverse traffic channel for a mobile terminal, the initial mean open loop power level enabling handoff of an active call from a first access network to a second access network, the method comprising:
- measuring, at the mobile terminal, a measured mean received power level of the forward link of the second access network;
- transmitting, from the mobile terminal, the measured mean forward link power to the second access network;
- receiving, at the mobile terminal, an open loop power adjustment factor from the second access network, the open loop power adjustment factor being based on the measured mean forward link power;
- and
- setting, at the mobile terminal, the initial mean open loop power level based on the open loop power adjustment factor.
A system for determining an initial mean open loop power level of a pilot channel of a reverse traffic channel for a mobile terminal, the initial open loop power level enabling handoff of an active call from a first wireless access network to a second wireless access network, the system comprising:
- the second wireless access network having an air interface standard that is different from a first air interface standard of the first wireless access network, the second access network configured to:
- receive a measured mean forward link power from the mobile terminal;
- determine an open loop power adjustment factor based on the measured mean forward link power;
- and
- transmit the open loop power adjustment factor to the mobile terminal.
Dependencies are inferred from the claim text.