Urban metro system is extremely complex, involving a lot of professional technologies. The rail transit communication and signal system is the core of the running system, directly deciding whether the rail works properly.
Commissioned Technology & Equipment Professional Committee of China Association of Metros has carried out research and test on technologies based on 1.8G band (1785-1805MHz) and TD-LTE, and put forward the ground communication system (LTE-M) technical standard satisfying the city metro integrated business.
LTE is a wireless technology set by 3GPP£¬which introduced the key transmission technologies OFDM and MIMO and increased the spectral efficiency and data transfer rates - downlink peak rate of 100 Mbps and uplink peak rate of 50Mbps were achieved with a 20M bandwidth.
LTE system network architecture is more flattened and simplistic with less network nodes and system complexity, smaller system delay and lower network deployment and maintenance cost.