1. Published in :-IEEE Communication Magazine
OpenRAN : A New Architecture for Mobile Wireless Internet Radio Access Networks
Published in :-IEEE Communication Magazine
Presented by :
CHANDAN KUMAR MISHRA
Roll no.- 31
CS-A, SOE
Guided by- Mrs Ancy Zachariah

2. Contents Introduction The Next Generation Wireless Dream
Requirements Of Future Radio Access Networks
Present Scenario
Looking anew into the Access Network
Third-Generation(3G) RAN Architectures
OpenRAN Requirements
OpenRAN Architecture
Future Work
Summary

3. Introduction
RAN : Radio Access Network an extensive wired network between the core network and the radio transceivers that handle particular cells provides functions that coordinate access to the radio link between multiple radio base stations and between mobile terminals
OpenRAN- proposed by James Kempf, Parviz Yegani a new architecture for mobile wireless RANs based on a distributed processing model with a routed IP network as the underlying transport fabric the architecture consists of a collection of 77 atomic functions grouped into 16 functional entities with 32 interfaces between them

4. The Next Generation Wireless
Dream
“Network Utopia” – The anytime, anywhere, anything networking paradigm
Current and Emerging Wireless Technologis IMT-2000/3GPP,MBS, BWA
Broadband Data-centric Services – multimedia documents, high quality video conferencing, mobile gaming
Seamless co-existence of heterogeneous wireless technologies
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5. Requirements Of Future Radio Access Networks
Increased data-rates and backhaul traffic
Spectrum
Scalability, Flexibility and Reconfigurability
Low Cost Of deployment and
Operation

6. Present Scenario Access Network Perspective
The Network is primarily designed to support circuit-
switched traffic
The current network infrastructure is untenable for high-capacity, high-data rate micro-cellular services
Current Backhaul use TDM based T1/E1 links which incur huge costs
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7. The Transition…..
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8. 3G RAN Architectures
Star topology & Centralized architecture a centralized RNC is connected by point-to-point link with the BTSs
RNC(Radio Network Controller) allow mobile nodes to roam between geographical areas controlled by different RNCs without requiring the participation of the core network in a handoff connected to circuit-switched core network for voice call and circuit-switched data connected to packet-switched access gateway for direct access to the Internet
BTS(Base Transceiver Station) handle radio network connectivity for a particular region or cell

9. 3G RAN Architectures
(RNC)
(RNC)

10. 3G RAN Architectures
Potential problems the RNC is a single point of failure
- incrementally upgrading RAN capacity to handle more mobile terminals is sometimes not possible
- Each radio link protocol has its own radio network layer protocol implemented by the RNC to control the radio link

11. Looking Anew : OpenRAN Architecture –
An all-IP Paradigm
“ The vision of the OpenRAN Architecture is to design a radio access network with the following characteristics
Open
Flexible
Distributed
Scalable ”
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12. OpenRAN Requirements
Architectural requirements Compatible with existing multiple radio technologies.
-Having separate and distributed control and bearer path on the core network side of the RAN
- Must support IP as the base layer for both control and bearer transport

13. OpenRAN Requirements
- Support Operation, Administration, and Network Management based on open interfaces and Internet Engineering Task Force(IETF) network management protocols QoS issues
must support multiple QoS levels
QoS on the wire in the RAN and over the air must be integrated

14. OpenRAN Requirements
Operator and Service requirements Having open interfaces between network entities, with IETF protocols wherever possible Interoperability with 2G/3G core networks, and with 2G/3G access networks Easy installation and configuration by allowing components to auto-configure wherever possible Allow handoff between different radio link protocols on a single RAN

15. OpenRAN Architecture Partitioning a RAN into atomic functions
Grouping the atomic functions into functional entities based on the requirements
Identify Interfaces between the functional entities
Possible protocol development characterize the nature of the traffic over those on those interfaces

16. OpenRAN Architecture

17. Functional Entities
The functional entities are divided into two parts:
1. Control plane functional entities
2. Bearer plane functional entities
Radio layer 1 and O A&M kept as separate function
Control plane functional entities: Control the radio link protocol between the mobile terminals and the BTSs
Bearer plane functional entities: involved in adapting application IP traffic to the radio in both the uplink and downlink directions

18. Radio Layer 1
Functions involved in controlling radio layer 1 were collected in it.
Initial detection and establishment of contact with
a mobile terminal
System information broadcast
Power control uplink outer loop power measurement downlink outer loop power control uplink inner loop power control

19. Operations, Administration, and Management
Identified functions static configuration and allocation of common radio resources configuration of system information broadcast management of IP address assignment in the RAN radio network operations and maintenance database management tracing control
Interoperable RAN management using IP protocols
such as SNMP was identified as an important part
of the OpenRAN architecture

20. Access Gateway Not part of the OpenRAN
Handles traffic between the OpenRAN and
an IP core network
Handles admission control and QoS
Performs authorization and authentication to admit
IP packet flows between the core and RAN
maps QoS classifications on incoming and outgoing
application packets between the RAN and the core

21. Multistandard RAN Common O&M Common Network Elements
Radio Resource Management
information collection
multistandard RRM algorithms
access network selection
IP Core Network
during handover /
connection
set up
Multistandard
RRM
UMTS
OpenRAN
GSM
OpenRAN
Hiperlan
OpenRAN
load
services
price
coverage
location
velocity
QoS requirements
radio interfaces

22. Future Work Mechanisms for pushing mobility management QoS & Security
A common radio network layer protocol for multiple radio link protocols
Standardization & Interoperability
Network management

23. Summary The OpenRAN architecture is a first step toward
an all-IP radio access network
The OpenRAN architecture
- describes how to decompose radio access network functionality in a way that allows a distributed implementation opens the door to implementing functions common among multiple radio link protocols
There is still much work to be done
- how to implement common functions a common radio network layer protocol interoperable network management.

24. REFERENCES
IEEE COMMUNICATION MAGAZINE OpenRAN by James Kempf, DoCoMo Communications Laboratories, USA Parviz Yegani, Cisco Systems.
Mobile Wireless Internet Forum

25. Thank You Obrigado Gracias Grazie Merci Danke Self explanatory Korean
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Gracias
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Obrigado
Thank You
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Merci
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Danke
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Self explanatory
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26. QUERIES?