Desgin And Research On The In-Device LTE-Ism Co-Existence Testing

With the rapid development of wireless communication and mobile Internet technology, the traditional communication networks which brought a small amount of data services cannot meet the rapidly growing market demand. The user equipment (UE) is equipped with LTE, WiFi and BT (Bluetooth) wireless access technologies that enable UE access into the data network more easily. Since these radio access technologies operating in band near2.4GH ISM bands.When UE moves in an area which has been covered by various radio access technologies, due to the mutual interference, the coexistence of wireless technologies working at the same time can be troublesome.This paper did actual product-oriented research, designed testing cases and reported the results of an extensive experimental study on the performance of LTE, WiFi and BT. Firstly, proposed the in-device coexistence interference between three technologies in theoretically. Then according to the UE’s real life usage scenarios, selected appropriate UEs, test instruments and wireless network environments and designed test platforms corresponding to different usage scenarios. At last, from different frequency intervals, antenna isolation, transmission power level and the receive signal strength indication’s perspective to verify, test and quantify the degree of in-device coexistence interference. This kind of study about produceted-oriented coexistence test has never done before. The test results demonstrated the previous theoretical analysis, reflect the interfercence from different perspecitve through charts, and analysed the test result in theoretically.