AnyCell Connectivity Supporting Any Mobile Radio Technology
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The document discusses advancements in connectivity across mobile radio technologies, focusing on synchronization challenges and solutions for radio access networks. It emphasizes the importance of precise timing and presents methods like the IEEE 1588v2 for synchronization delivery. Additionally, it highlights the deployment benefits and challenges of fronthaul and backhaul connectivity within the network infrastructure.
AnyCell Connectivity Supporting Any Mobile Radio Technology
- 1. Ulrich Kohn – Director Technical Marketing LTE World Summit 2014 AnyCell Connectivity Supporting any Mobile Radio Technology
- 2. © 2014 ADVA Optical Networking. All rights reserved. Confidential.22 3GPP Radio Interface Innovation From 2G trough 4G and beyond … QoS Management More Spectrum Air Interface Evolution Carrier Aggregation Spectrum Re-Use Interference Coordination
- 3. © 2014 ADVA Optical Networking. All rights reserved. Confidential.33 AnyCell™ Connectivity Evolved Packet CoreMacro Cell Small Cell Small Cell (RRH) Macro Cell Hub Site Small Cell (RRH) Backhaul and fronthaul efficiency for radio access networks Managed Fronthaul Connectivity Assured Time/Phase Synchronization Agenda:
- 4. © 2014 ADVA Optical Networking. All rights reserved. Confidential.44 Application Radio Interface Backhaul Frequency Phase Frequency Phase CDMA 2000 ±50ppb ±3 to 10µs GPS GPS GSM ±50ppb n/a ±16ppb n/a WCDMA ±50ppb n/a ±16ppb n/a LTE (FDD) ±50ppb n/a ±16ppb n/a LTE (TDD) ±50ppb ±1.5µs ±16ppb ±1.1µs LTE-A MBSFN ±50ppb ±1 to 5µs ±16ppb ±1.1µs LTE-A CoMP ±50ppb ±1 to 5µs ±16ppb ±1.1µs LTE-A eICIC ±50ppb ±1 to 5µs ±16ppb ±1.1µs Mobile Backhaul Synchronization Needs new new
- 5. © 2014 ADVA Optical Networking. All rights reserved. Confidential.55 Network-based timing distribution • ITU-T Synchronous Ethernet: Good long-term solution for hop-by-hop frequency distribution • IEEE 1588v2 – Precision Time Protocol: Favored solution for combined frequency & phase alignment GNSS-based synchronization • GPS or GLONASS: Global coverage with availability challenges Combination required to meet precision and availability targets IEEE 1588 GPS/ GNSS SyncE RAN Synchronization Options
- 6. © 2014 ADVA Optical Networking. All rights reserved. Confidential.66 Synchronization Delivery Challenges Jitter, wander and asymmetric delay are causing timing error Frequency Synchronization Time/Phase Synchronization Delay Asymmetry Packet Delay Variation
- 7. © 2014 ADVA Optical Networking. All rights reserved. Confidential.77 • Antennas must have line-of- sight to multiple satellites • Easy to jam both maliciously and unintentionally • Interference caused by weather conditions • Reflections at tall buildings in urban canyons Challenges with GNSS Availability issues plus high deployment and maintenance cost Radio Base Station GNSS
- 8. © 2014 ADVA Optical Networking. All rights reserved. Confidential.88 • Frequency holdover to within 16ppb for 72 hours is practical • Rubidium or dual-oven quartz technology • No oscillator technology will achieve the required holdover performance of ±1µs over 72 hours • Rubidium clock will hold ±1µs for 8 hours • PRTC-quality Cesium clock will hold ±1µs for one day • ±1µs over 72 hours equals approximately 0.004ppb Holdover Boundary Conditions Need to constantly track a reference for time protection
- 9. © 2014 ADVA Optical Networking. All rights reserved. Confidential.99 1588v2 PTP Frequency Synchronization Over-the-top implementation across non-sync-aware backhaul T-GM GNSS PRTC PTP Grandmaster PTP Slave Clock Packet-Based Backhaul Network T-SC Radio Base Station
- 10. © 2014 ADVA Optical Networking. All rights reserved. Confidential.1010 1588v2 PTP for Phase Synchronization Lacking end-to-end control of delay asymmetry in the network T-GM GNSS PRTC PTP Grandmaster PTP Slave Clock Packet-Based Backhaul Network T-SC Radio Base Station Each network element needs to be PTP-aware (T-BC)
- 11. © 2014 ADVA Optical Networking. All rights reserved. Confidential.1111 Combined APTS and mini-GM Deployment Efficient and highly available synchronization of radio base stations T-GM GNSS PRTC PTP Grandmaster Packet-Based Backhaul Network APTS mini-GM Local Base Station GNSS Remote Base Station T-SC T-SC T-SC T-SC
- 12. © 2014 ADVA Optical Networking. All rights reserved. Confidential.1212 Visibility Across the Entire Network Monitoring the performance of the synchronization infrastructure T-GM GNSS PRTC PTP Grandmaster APTS mini-GM Probe Local Base Station GNSS Remote Base Station T-SC T-SC T-SC T-SC End-to-End Measurement of Delay Asymmetry Remote Slave Clock Testing Local Slave Clock Testing Packet-Based Backhaul Network Self-Calibration and Clock Validation
- 13. © 2014 ADVA Optical Networking. All rights reserved. Confidential.1313 • Precise and robust delivery of phase synchronization • Combining grandmaster with network- based synchronization distribution • Suitable for network upgrade and greenfield applications • Synchronization delivery and most advanced assurance functions OSA 5410 FSP 150SP-100 APTS and mini-GM in a Single Device Simplifying the evolution to TD-LTE and LTE-Advanced
- 14. © 2014 ADVA Optical Networking. All rights reserved. Confidential.1414 From Remote Radio Head to Cloud-RAN RRH RRH RRH BBU RRH RRH BBU RRH EPC CPRI CPRI S1 S1 X2 RRH RRH RRH RRH RRH RRH EPC CPRI CPRI S1 X2 BBU Pool Centralizing control for improved flexibility and efficiency
- 15. © 2014 ADVA Optical Networking. All rights reserved. Confidential.1515 • Benefits • Tight interference and spectrum coordination • Highest spectral efficiency • Phase synchronization of RRHs not required • Small footprint and simple deployment • Challenges • Low-latency, high bandwidth connection • CPRI needs to be transported over fiber • Limited reach • WiFi small cells not supported by CPRI standard Centralized vs. Distributed BBUs Fronthaul and backhaul will co-exist for RAN interconnection
- 16. © 2014 ADVA Optical Networking. All rights reserved. Confidential.1616 Passive DWDM for Fronthaul Connectivity Challenge: passive DWDM lacks ability to assure service integrity RRH RRH RRH RRHRRHRRH Small Cell Small Cell Small Cell Macro Cell Centralized BBU Pool FSP 3000 ALM
- 17. © 2014 ADVA Optical Networking. All rights reserved. Confidential.1717 Access Link Monitoring (ALM) Access Link Monitoring (ALM) is designed for intelligent passive optical multiplexing • Clear demarcation of fiber infrastructure to the rest of the equipment through use of a probe reflector • Simplified root cause analysis as ALM supervises the health of the fiber infrastructure • Simple integration into NMS by north-bound interface CPE Device Access Fiber Link Probe In/OutProbe Reflect CO Device Reflectance 1x Measurement Principle Distance
- 18. © 2014 ADVA Optical Networking. All rights reserved. Confidential.1818 OptojackTM Fronthaul Monitoring Non-intrusive fiber monitoring and optical service assurance RRH RRH RRH RRHRRHRRH Small Cell Small Cell Small Cell Macro Cell Centralized BBU Pool FSP 3000 ALM FSP Service Manager Probe Reflect
- 19. © 2014 ADVA Optical Networking. All rights reserved. Confidential.1919 Why ADVA Optical Networking? Fronthaul Network Active and passive solutions for managing connectivity Comprehensive Portfolio Synchronisation DWDM Carrier Ethernet Assurance Synchronization Enablement Different needs even with same network ask for versatile solution ADVA Optical Networks protects your investment and paves the way to higher network performance
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