Signaling design to support in-device coexistence interference avoidance

A user equipment (UE), comprising:

• a measurement module that measures a radio signal received by an LTE radio module co-located with an Industrial, Scientific and Medical (ISM) radio module in the UE, wherein the UE receives a measurement configuration with a measurement pattern from the base station, and wherein the UE performs measurements at a period when ISM traffic is active;
• a transmitter that sends an in-device coexistence (IDC) interference indication and an ISM traffic pattern to a base station, wherein the IDC interference indication indicates an implied unusable frequency region due to a coexistence problem between the LTE radio module and the co-located ISM radio module, wherein the transmitter also sends a second embedded indication of whether there is a possible usable frequency outside the implied unusable frequency region, and wherein the second embedded indication is determined based on measurement results associated with the measurement pattern;
• and
• a receiver that receives a usable frequency channel for handover if the second embedded indication indicates the possible usable frequency, wherein the usable frequency channel is located in LTE band excluding the implied unusable frequency region.