LTE Quick Reference provide useful information related to LTE. If you want to add some particular topics, please email me and I will try to update it to enrich to content. Current notes: LTE Network Architecture. LTE Call Flow. 3GPP Cause Value. Channel Bandwidth from 1. 4MHz to 20MHz. Channel Mapping. DL Throughput Calculation. EMM and ECM State. Frequency Band. Identifiers.