Motorola announced the first successful packet-switched network handoff between CDMA EV-DO Rev-A and Long Term Evolution (LTE) technologies in a demonstration with VoIP calls and streaming video. In the Motorola demonstration, laptops and mobile devices are equipped with dual radio transceivers that support both CDMA/EV-DO Rev-A and LTE and are active during the packet handoffs. As a device loses LTE connectivity, it automatically switches to EV-DO to ensure consistent streaming without dropping IP packets. The process is then reversed, and devices switch back to LTE when LTE connectivity is restored. Motorola noted that the handover mechanisms employed in this demonstration leverage concepts which are part of the non-optimized handover procedures in LTE core network SAE standard 3GPP TS 23.402.
Motorola said its handoff technique illustrates how service providers using CDMA-based networks can smoothly integrate broadband OFDMA and IP packet-based wireless broadband technologies like LTE into their network.
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