Multi-mode coexistence method for a multi-mode communication device

A multi-mode coexistence method for a multi-mode communication device comprising steps of:

• a) setting priorities of frequency usage for all modes supported by the multi-mode communication device;
• ab1) storing in the multi-mode communication device a correspondence between a channel of a mode and frequency interference range generated by the channel;
• ab2) starting frequency hopping by the multi-mode communication device;
• ab3) deciding whether a mode starting frequency hopping is a highest priority mode currently used, and if so, performing frequency hopping, and otherwise, proceeding to a step ab4);
• ab4) setting each of currently-used modes with a priority higher than that of said mode starting frequency hopping as the higher priority mode, and said mode starting frequency hopping as a lower priority mode;
• b) determining a channel where a signal of the lower priority mode is interfered with by that of the higher priority mode;
• c) performing frequency hopping to outside said determined channel by the lower priority mode;
• d) deciding whether said mode starting frequency hopping is the lowest priority mode currently used, and if not so, executing step e);
• and
• e) deciding whether the signal after said mode starting frequency hopping performs frequency hopping is interfering with any of currently-used modes with a priority lower than said mode starting frequency hopping, and, if there is interference, causing those interfered modes to start frequency hopping in a descending order of priority.