Cognitive Radio RF: Overview and Challenges

Table 1

Summary of CRS activities in standardization and open issues.

Functionality	Covering organization
Definitions	IEEE SCC 41, ETSI, ITU-R
Coexistence	IEEE 802.19, IEEE SCC 41
SDR	IEEE SCC 41, SDR Forum, ITU-R, OMG, ETSI
Radio interfaces	IEEE 802.22, 3GPP, ECMA
Heterogeneous access	ETSI, IEEE SCC 41
Spectrum sensing	IEEE 802.22, IEEE SCC 41
Testing	—
Networking	—
Security	—