When stricken by a catastrophic natural disaster, emergency rescue operation is very critical to many lives. Many people trapped in the disastrous areas under collapsed buildings or landslides may have a large chance to survive if they are rescued in "Golden 72 Hours". Victims rescued from the debris and evacuated from their home jammed in shelters need life support material to support their lives. They also need to communicate to each other for various reasons. However, communication systems were usually down due to various reasons. The loss of communication systems and information networks made the rescue and relief operation extremely difficult. Many people died before they got a chance to be rescued. This paper analyzes the causes that paralyzed the entire communication systems in Jiji/Taiwan Earthquake and proposes a MANET based communication platform as well as a Rescue Information System for Earthquake Disasters that can support a large number of rescue volunteers under catastrophic natural disasters.

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LTE-Advanced employs Orthogonal Frequency-Division Multiplexing (OFDM), Carrier Aggregation (CA), Multi Input Multi Output (MIMO), Co-ordinated Multi-Point Transmission (CoMP) and Relay Station state of the art techniques to significantly enhance transmission performance and extend BS service coverage. On the other hand, Femtocell, specified in 3GPP Rel-8, has the advantages of low power consumption, zero-touch PnP, low cost, coverage enhancement, mobile data offload, etc. However, the hybrid LTE macrocell / femtocell networks may have interference problems among femtocells and macrocells. In the literature, FFR (Fractional Frequency Reuse) and SFR (Soft Frequency Reuse) are two wellknown frequency reuse methods to manage interferences.However, experiments results show that both FFR and SFR cannot achieve significant throughput and spectrum utilization enhancement. In this paper, we propose a hybrid dynamic frequency reuse and CoMP technique, DMFR, which is applicable to LTE macrocell / femtocell networks and is able to enhance both the cell edge and adjacent sector transmission performance through adaptive spectrum allocation, interference management and CoMP techniques. Simulation results show that DMFR outperforms FFR in terms of throughput and spectrum utilization.

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