Capacity enhancement of VoIP over LTE by stochastic adaptive modulation and coding (無線通信システム)
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概要
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The Erlang capacity of Voice over Internet Protocol (VoIP) over Long-Term Evolution (LTE) is enhanced by using stochastically adaptive modulation and coding (SAMC). A Channel Quality Indicator (CQI) is derived which makes no assumption about radio channel characteristics and is therefore highly robust against mobility patterns. In effect, SAMC minimizes the number of physical layer (PHY) re-transmissions caused by Hybrid Automatic-Repeat Request (HARQ). Simulation results indicate that SAMC doubles Erlang capacity of VoIP over LTE while providing even lower average delay per user equipment (UE).
- 社団法人電子情報通信学会の論文
- 2009-01-15
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