The embodiment of the invention provides a triggering method, a device and a communication system for a cache status report. The method includes: the user equipment in one or more wireless access infrastructure communication mode based on load conversion device to device communication mode of wireless bearer, the one or more device to device communication mode based on wireless carrying at least one radio bearer corresponding PDCP entities or the RLC entity to be transmitted data available under the condition based on the trigger for the device to device communication buffer status report. Thus, equipment to the cache status report between devices can be triggered or can be triggered; can avoid the base station side cannot access or not timely access to the device to device communication between data and other information of the problem.
【技术实现步骤摘要】
【国外来华专利技术】PCT国内申请，说明书已公开。
【技术保护点】
PCT国内申请，权利要求书已公开。
【技术特征摘要】
【国外来华专利技术】PCT国内申请，...
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