Mobile terminal device and roaming method thereof

Details Mobile terminal device and roaming method thereof Mobile terminal device and roaming method thereof

2011-08-02

2011-08-02

Afshar, Kamran (Department: 2617)

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

C455S552100, C455S553100, C370S331000, C370S328000, C370S338000

Reexamination Certificate

active

07991425

ABSTRACT:
A mobile terminal device detects current communication environment status of the device and calculates a value of a radio quality index (RQI), and adjusts the roaming threshold according to the value of the RQI. The device further calculates a value of a user movement index (UMI) and adjusts the frequency of the device for scanning object access points. After determining the object access point that has satisfied a roaming threshold, the device ends the communication between the device and the current access point, and establishes a communication between the device and the object access point.

REFERENCES:
patent: 5991287 (1999-11-01), Diepstraten et al.
patent: 7120448 (2006-10-01), Brouwer
patent: 2002/0150063 (2002-10-01), Tran

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