Method and apparatus for avoiding in-device coexistence interference

摘要

A method, system and device are provided for avoiding in-device coexistence interference between different radio technologies deployed in adjacent bands on the same device by controlling and separating the LTE signaling and the non-LTE signaling using dedicated time intervals to separate LTE signaling from non-LTE signaling. In addition, coexistence mode handover procedures are provided which use threshold-based triggering events to avoid coexistence interference and to prevent ping-pong effects by establishing a “keeping time” parameter so that a non-interfering network node does not switch back to an interfering network node after handoff. Coexistence interference is also avoided by providing a hybrid automatic repeat request (HARQ) mechanism which accounts for coexistence interference by providing a fixed or variable on-interval parameter and an activity parameter indicating whether non-LTE activity is present to maximize a time interval for non-LTE devices without interference from LTE activity on the same device.

主权项

1. A method for use in user equipment (UE) comprising first and second radio technology components on a single platform, comprising:
detecting a Long Term Evolution (LTE) handover when a signal strength measure for a source becomes worse than a first absolute threshold and that a signal strength measure for a target becomes better than a second absolute threshold due to in-device coexistence interference, when a signal strength measure for the target becomes better than an offset relative to a signal strength measure for the source due to in-device coexistence interference, or when a signal strength measure for the source becomes worse than an absolute threshold due to in-device coexistence interference, or an Inter-Radio Access Technology (Inter-RAT) handover when a signal strength measure for the source becomes worse than an absolute threshold due to in-device coexistence interference; sending a message to request handover for the first radio technology component from the source to the target for a proposed minimum holding time; receiving a handover command message to handover the first radio technology component from the source to the target for a specified minimum holding time to establish a coexistence mode for the first and second radio technology components; and enabling the first radio technology component to handover the first radio technology component to the target for the specified minimum holding time so that the first radio technology component is not handed back to the source during the specified minimum holding time, thereby enabling the radio resources on the UE to be used by the second radio technology component without interference from/to the first radio technology component.