Design of Digital Radio Call Control Interface Based on dPMR

The scheme of the call control interface design is proposed based on the protocol of dPMR.The paper first introduces the protocol of dPMR and the signaling format of the call control interface.Then description of three different working status and the calling procedure under the above three working status is presented in detail.Finally,hardware implementation of the call control interface has been realizedby Verilog HDL,and the simulation of the call control scheme has been verified by Modelsim.