System and Method for Cooperative Spectrum Sensing in Cognitive Radio Systems
AssigneeFuturewei Technologies, Inc.
InventorsDongdong Li, Dandan Wang, Mazin Al-Shalash, Anthony C.K. Soong, Guodong Zhao, Chenyang Yang
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Abstract
A system and method for cooperative spectrum sensing in cognitive radio (CR) systems is provided. A method for CR user operation includes coordinating with partner CR users to share spectrum sensing information, combining spectrum sensing information from partner CR users, and determining if a transmission opportunity exists based on the combined spectrum sensing information. The method also includes transmitting a message to a CR user if the transmission opportunity exists, and storing the message if the transmission opportunity does not exist.
Claims22
A method for cognitive radio (CR) user operation, the method comprising:
- coordinating with partner CR users to share spectrum sensing information;
- combining spectrum sensing information from the partner CR users;
- determining if a transmission opportunity exists based on the combined spectrum sensing information;
- transmitting a message to a CR user if the transmission opportunity exists;
- and
- storing the message if the transmission opportunity does not exist.
A method for cognitive radio (CR) user operation, the method comprising:
- sensing a spectrum, wherein the spectrum comprises a frequency band used for transmissions by a CR user that overlaps with at least a portion of a protected frequency band;
- and
- coordinating with partner CR users to share spectrum sensing information, wherein the coordinating includes sharing information based on a relative position of the CR user and the partner CR users.
A communications device comprising:
- a receiver coupled to an antenna, the receiver configured to receive signals detected by the antenna;
- a transmitter coupled to the antenna, the transmitter configured to transmit signals using the antenna;
- and
- a processor coupled to the receiver and to the transmitter, the processor configured to sense a state of a spectrum band over which signals are transmitted and received, to combine spectrum band state information received from neighboring communications devices, and to compute a decision threshold for deciding if the spectrum band is occupied or idle.
Dependencies are inferred from the claim text.