发明授权
US08228876B2 Signal quality determination methods and apparatus suitable for use in WLAN-to-WWAN transitioning
有权
适用于WLAN到WWAN转换的信号质量测定方法和装置
- 专利标题： Signal quality determination methods and apparatus suitable for use in WLAN-to-WWAN transitioning
- 专利标题（中）： 适用于WLAN到WWAN转换的信号质量测定方法和装置
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申请号： US12509002申请日： 2009-07-24
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公开(公告)号： US08228876B2公开(公告)日： 2012-07-24
- 发明人: Bing Ying (Miranda) Lim
- 申请人： Bing Ying (Miranda) Lim
- 申请人地址： CA Waterloo, Ontario
- 专利权人： Research In Motion Limited
- 当前专利权人： Research In Motion Limited
- 当前专利权人地址： CA Waterloo, Ontario
- 代理商 John J. Oskorep, Esq.
- 优先权： CA2667820 20090529
- 主分类号： H04W4/00
- IPC分类号： H04W4/00 ; H04W36/00
摘要：
A mobile terminal performs communication operations for maintaining a voice or data call via a wireless AP of a WLAN. During this time, the mobile terminal identifies a RSSI value and a SNR value of an RF signal of the wireless AP. When the RSSI value is less than a predetermined RSSI value, and the SNR value is less than a predetermined SNR value, the mobile terminal provides an indication to switch the communication operations from the WLAN to a WWAN. However, when the RSSI value is less than the predetermined RSSI value, but the SNR value is greater than the predetermined SNR value, the mobile terminal provides an indication to maintain the communication operations in the WLAN. In a concurrent process, the mobile terminal determines a transmission error value for data packet transmissions based on a count of data packet errors.
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