Extended broadcast channel of communication system, extended network equipment and extended terminal equipment

The invention discloses an extended broadcast channel of a communication system, extended network equipment thereof and extended terminal equipment thereof, which enable a novel system to have sufficient downward compatibility for an old system and simultaneously meet the requirement of the novel system on more information transmission. The invention adopts the technical scheme that the extended broadcast channel comprises a main frequency band broadcast channel and other frequency band broadcast channels, wherein the main frequency band broadcast channel contains primary LTE system information and working frequency point, bandwidth and working mode information of other frequency bands; and the other frequency band broadcast channels contain working frequency point and bandwidth information of a main frequency band and system information related to the frequency band. The invention is applied in the field of mobile communication.