复杂度 ：算法的复杂度会影响设备的实现成本和功耗，因此在实际应用中需要权衡性能和成本。The voice component can both be shipped as Voice over World-wide-web Protocol (VoIP) or on a separate fallback provider dedicated to voice-only, i.e. CDMA2000 1 x copyright. EVDO would not provide integrated voice and only