Self Organized Networks in Mixed 2G and 4G using YateBTS YateUCN YateENB

1. SON and self-healing
in unified 2G/4G RAN
David Burgess, Legba Inc.
IPWC SON Workshop
April 2015
Copyright © Legba Incorporated 2015

2. Mixed 2G/4G future
• SON normally a 4G topic
• 2G will persist in many places
• Mixed 2G/4G will continue to be common
• Apply SON to 2G to lower management costs
2G 4G
SON

3. YateBTS, YateENB and YateUCN
• Mixed 2G/4G networks
• Making 2G RAN more LTE-like
• self-organizing and self-healing
in 2G and 4G RAN
• Unified Core Network (UCN) provides
Core functions for both 2G and 4G
YateUCN
YateBTSYateENB
YateUCN

4. Peering in YateBTS
• No BSC means the BTS units connect directly
• Functionality similar to LTE X2
• Neighbor information exchange through peering
YateUCN
YateBTSYateENB YateBTS
YateUCNYateUCN
Peering Peering
Any
IP Backhaul
YateENB
X2

5. Seeding Neighbor List - step 1
Start from a "seed list" based on coverage estimates that
exist in the site provisioning server
YateBTS
Site provisioning
Server
Location
Seed list

6. Neighbor Discovery - step 2
Web-walking, using neighbors lists of neighbors, through
the peer interface

7. Optimization - step 3
• Use measurement reports from handsets
• Use congestion reports from neighbors
• Automatic detection of offline neighbors
• Use KPIs to close the optimization loop
Neighbors
RRC
&
Monitoring
MS
Neighbor
list
Congestion
Reports
Signaling
Measurements
KPIs
Optimization

8. Self healing - step 4
• Detection of offline neighbors
• Real time congestion management
• Neighbor list adjustments
• Power and tilt adjustments

9. Failover/load balancing for Core in
both 2G and 4G
• BTS-UCN many-to-many relationship
• UCN IP addresses distributed to BTSs and ENBs via DNS
YateUCN
YateBTSYateENB YateBTS
YateUCNYateUCN
Any
IP Backhaul

10. Summary
• Unified SON management simplifies network
operations.
• Mixed 2G/4G networks will be with us for years.
• Frees staff resources for tasks that cannot be
automated
More information:
- www.yate.ro
- David Burgess: +1-707-208-2622
david@leg.ba