ECPRI测试原理和测试方法ppt课件
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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
✓The Functional Split defined in the protocol adapts to the application.
✓It is a tradeoff between latency requirements and bandwidth
reduction
Mobile Fronthaul Testing
✓ 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
Drawbacks of co-location:
Electrical Cable
RF and Baseband Processing are co-located at the base of the tower.
Mobile Needs to be physically located very close to the
Backhaul antenna because they are driven over very lossy
RF BB
electrical cables.
Cell Site Cabinet
High power dissipation require costly special enclosures with climate control and power redundancy
Fiber Link replaces COA
Less power required at the cell site
Mobile Less processing and power requirements at the Backhaul cell site
Smaller footprint, easier to find sites
2
CPRI/OBSAI – Fronthaul Network
RF
Fiber
BB
Mobile Fronthaul: CPRI/OBSAI
Separation of RF and Baseband processing.
Simplified function makes it more compact, easier to install and therefore increases the number of possible sites
Fiber allows great distance between the RRH and BBU location.
All BBUs located at the CO.
Iቤተ መጻሕፍቲ ባይዱformation of VeEX Inc.
3
Evolution of Mobile Fronthaul: eCPRI
Makes it difficult to install and find a location that can host the enclosure and/or increase lease price due to additional space needed
Information of VeEX Inc.
Confidential & Proprietary Information of VeEX Inc.
5
Front Haul Evolution
RF RF RF
RB FB
BBU Pool
BB CPRI/OBSAI BB
Fronthaul
BB BB
Mobile Backhaul
RB FB
RB FB
BBU Pool
eCPRI Primer
Be Ready to Participate in the Conversation
Rev. A
October 2017
Traditional Macro-cell
Base station functions are co-located with the radio tower at the base of the antenna or basement of a tall building.
BB eCPRI Fronthaul BB
BB BB
Mobile Backhau
Information of VeEX Inc.
eCPRI Elements
eRE = eCPRI Radio Equipment (Remote Radio Head) eREC = eCPRI Radio Equipment Controler (Baseband Unit) 3 data flows between RE and REC:
eCPRI uses packet-based transport network
IP or Ethernet
Mobile Fronthaul Testing
Confidential & Proprietary Information of VeEX Inc.
4
How does eCPRI achieve this?
Synchronization traffic (1588 PTP) Control and Management Traffic User Plane traffic (I/Q samples)
✓Transport Network Layer (Ethernet/IP) ✓Synchronization (SyncE/PTP) ✓C&M (SNMP, Ethernet OAM)
✓ eCPRI introduces a functional split for baseband processing between BBU and RRH.
This is not scalable for 5G traffic
eCPRI is designed to meet the needs for 5G
Improves bandwidth efficiency Increases capacity
✓The Functional Split defined in the protocol adapts to the application.
✓It is a tradeoff between latency requirements and bandwidth
reduction
Mobile Fronthaul Testing
✓ 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
Drawbacks of co-location:
Electrical Cable
RF and Baseband Processing are co-located at the base of the tower.
Mobile Needs to be physically located very close to the
Backhaul antenna because they are driven over very lossy
RF BB
electrical cables.
Cell Site Cabinet
High power dissipation require costly special enclosures with climate control and power redundancy
Fiber Link replaces COA
Less power required at the cell site
Mobile Less processing and power requirements at the Backhaul cell site
Smaller footprint, easier to find sites
2
CPRI/OBSAI – Fronthaul Network
RF
Fiber
BB
Mobile Fronthaul: CPRI/OBSAI
Separation of RF and Baseband processing.
Simplified function makes it more compact, easier to install and therefore increases the number of possible sites
Fiber allows great distance between the RRH and BBU location.
All BBUs located at the CO.
Iቤተ መጻሕፍቲ ባይዱformation of VeEX Inc.
3
Evolution of Mobile Fronthaul: eCPRI
Makes it difficult to install and find a location that can host the enclosure and/or increase lease price due to additional space needed
Information of VeEX Inc.
Confidential & Proprietary Information of VeEX Inc.
5
Front Haul Evolution
RF RF RF
RB FB
BBU Pool
BB CPRI/OBSAI BB
Fronthaul
BB BB
Mobile Backhaul
RB FB
RB FB
BBU Pool
eCPRI Primer
Be Ready to Participate in the Conversation
Rev. A
October 2017
Traditional Macro-cell
Base station functions are co-located with the radio tower at the base of the antenna or basement of a tall building.
BB eCPRI Fronthaul BB
BB BB
Mobile Backhau
Information of VeEX Inc.
eCPRI Elements
eRE = eCPRI Radio Equipment (Remote Radio Head) eREC = eCPRI Radio Equipment Controler (Baseband Unit) 3 data flows between RE and REC:
eCPRI uses packet-based transport network
IP or Ethernet
Mobile Fronthaul Testing
Confidential & Proprietary Information of VeEX Inc.
4
How does eCPRI achieve this?
Synchronization traffic (1588 PTP) Control and Management Traffic User Plane traffic (I/Q samples)
✓Transport Network Layer (Ethernet/IP) ✓Synchronization (SyncE/PTP) ✓C&M (SNMP, Ethernet OAM)
✓ eCPRI introduces a functional split for baseband processing between BBU and RRH.