ECPRI测试原理和测试方法.pptVIP

eCPRI Primer Be Ready to Participate in the Conversation Rev. A October 2017 Base station functions are co-located with the radio tower at the base of the antenna or basement of a tall building. Drawbacks of co-location: RF and Baseband Processing are co-located at the base of the tower. Needs to be physically located very close to the antenna because they are driven over very lossy electrical cables. High power dissipation require costly special enclosures with climate control and power redundancy Makes it difficult to install and find a location that can host the enclosure and/or increase lease price due to additional space needed Traditional Macro-cell Information of VeEX Inc. 2 Electrical Cable Cell Site Cabinet Mobile Backhaul RF BB Separation of RF and Baseband processing. Simplified function makes it more compact, easier to install and therefore increases the number of possible sites Fiber Link replaces COA Less power required at the cell site Less processing and power requirements at the cell site Smaller footprint, easier to find sites Fiber allows great distance between the RRH and BBU location. All BBUs located at the CO. CPRI/OBSAI – Fronthaul Network Information of VeEX Inc. 3 Fiber Mobile Backhaul RF BB Mobile Fronthaul: CPRI/OBSAI Mobile Fronthaul Testing Confidential Proprietary Information of VeEX Inc. 4 Evolution of Mobile Fronthaul: eCPRI Why eCPRI? CPRI requires high data rate This is not scalable for 5G traffic eCPRI is designed to meet the needs for 5G Improves bandwidth efficiency Increases capacity eCPRI uses packet-based transport network IP or Ethernet eCPRI uses packet based transport network IP or Ethernet: using a switched or routed mobile fronthaul network makes it more flexible eCPRI uses existing standards for Transport Network Layer (Ethernet/IP) Synchronization (SyncE/PTP) CM (SNMP, Ethernet OAM) eCPRI introduces a functional split for baseband processing between BBU and RRH. The Functional Split defined in the p