초록 ▼

This invention relates to cognitive radio based wireless communications of dynamic spectrum access networks, and more particularly to a method of addressing radio frequency sensing control and dynamic frequency selection control. A method called Cognitive Dynamic Frequency Hopping that is based on t

This invention relates to cognitive radio based wireless communications of dynamic spectrum access networks, and more particularly to a method of addressing radio frequency sensing control and dynamic frequency selection control. A method called Cognitive Dynamic Frequency Hopping that is based on the selective Simultaneous Sensing and Data Transmissions is described. The Cognitive Dynamic Frequency Hopping method is further facilitated by a collision avoidance technique. The described method satisfies both reliable and timely RF sensing for guaranteeing licensed user protection, and QoS satisfaction for services of the dynamic spectrum access systems.

대표청구항 ▼

I claim: 1. An RF sensing method comprising overlapping data transmissions with RF sensing to monitor a full spectrum of channels including those that are in use for data transmissions, wherein bands of spectrum for RF sensing are adaptively selected to find a significant number of channels that are

I claim: 1. An RF sensing method comprising overlapping data transmissions with RF sensing to monitor a full spectrum of channels including those that are in use for data transmissions, wherein bands of spectrum for RF sensing are adaptively selected to find a significant number of channels that are likely to be vacated while guaranteeing reliable and timely RF sensing performance and, after hopping to a new channel, a DYSPAN system performs data transmission on that channel for an operation period which is terminated before the validation time of the channel plus the length of a grace period which is equivalent to the channel detection time.