Communication characteristic measuring device adapted to wireless terminal
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United States of America Patent
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Mar 5, 2013
Grant Date -
Jul 1, 2010
app pub date -
Dec 22, 2009
filing date -
Dec 25, 2008
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A cognitive terminal includes different types of radio modules suiting to different types radio media employed by a cognitive base station in the radio communication system. The radio module of the cognitive terminal counts the number of times it receives/transmits ACK/NACK in each unit time. A radio environment cognition unit of the cognitive terminal performs calculations using the count number(s) in consideration of the packet transmission time interval or the time required for repeating a single data packet, thus measuring characteristics of delay time variations in uplink/downlink communication with respect to each radio media. Thus, it is possible for the cognitive terminal to switch over radio media based on ACK/NACK in uplink/downlink communication.
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