OpenRAN - Mobile Wireless Internet Radio Access Networks


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Mobile Wireless Internet Radio Access Networks by Chandan Kumar Mishra from Computer Science Dept , 2011 pass-out batch from CUSAT, Kerala.

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OpenRAN - Mobile Wireless Internet Radio Access Networks

  1. 1. OpenRAN : A New Architecture for Mobile Wireless Internet Radio Access NetworksPublished in :-IEEE Communication Magazine Presented by : CHANDAN KUMAR MISHRA Roll no.- 31 CS-A, SOE Guided by- Mrs Ancy Zachariah 1/26
  2. 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 2/26
  3. 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 3/26
  4. 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 4/26
  5. 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. 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 6/26
  7. 7. The Transition…. . 7/26
  8. 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 8/26
  9. 9. 3G RAN Architectures (RNC) (RNC) 9/26
  10. 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 10/26
  11. 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 ” 8/26
  12. 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 12/26
  13. 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 13/26
  14. 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 14/26
  15. 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 15/26
  16. 16. OpenRAN Architecture 16/26
  17. 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 linkprotocol between the mobile terminals and the BTSsBearer plane functional entities: involved in adaptingapplication IP traffic to the radio in both the uplink anddownlink directions 17/26
  18. 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 18/26
  19. 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 19/26
  20. 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 20/26
  21. 21. Multistandard RAN Common O&M Common Network Elements IP Core Network during Radio Resource handover / connection Management set up  information collection Multistandard  multistandard RRM RRM algorithms UMTS GSM Hiperlan •load OpenRAN OpenRAN OpenRAN •services  access network •price •coverage selection •location •velocity •QoS requirements •radio interfaces
  22. 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 22/26
  23. 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. 23/26
  24. 24. REFERENCES IEEE COMMUNICATION MAGAZINE OpenRAN by James Kempf, DoCoMo Communications Laboratories, USA Parviz Yegani, Cisco Systems. Mobile Wireless Internet Forum 24/26
  25. 25. Grazie Hebrew Italian Gracias SpanishRussian Obrigado Thank Yo Portuguese Arabic Merci u English French Danke Traditional Chinese German Thai Simplified Chinese Tamil Japanese Korean 25/26
  26. 26. QUERIES? 26/26