WiMAX - ASN Protocols and Procedures
(2 days or 12 hours)
The WiMAX ASN (Access Service Network) comprises the WiMAX Base Stations and ASN Controller. These functional elements are connected using a combination of IP, some generic IETF protocols such as TCP, UDP and GRE and also protocols that have been developed specifically for operation within the WiMAX ASN. This course provides in-depth analysis of the end-to-end operation of the fixed part of the WiMAX ASN including its protocols, operation and architecture.
Who Should Attend
Support Engineers, Research and Development Staff and Technical Managers who require a detailed insight into the operation and architecture of the WiMAX Access Service Network.
Pre - Learning
Pre-Learning is provided to prime those attending the instructor led phase. Each lesson is based on an interactive online format and should take about 30 minutes to complete. The pre-Learning lessons are:
- Test of Understanding - Try the online check to see how much you know.
- WiMAX Network Architecture.
- Protocol Stacks and IP.
- Sigtran Basics.
- Problems with IP in Next Generation Networks.
Course Outline
Divided into 9 sections, the topics covered will include:
Section 1: WiMAX Documentation and Specifications (1 hour)
- WiMAX System Profiles, WiMAX Certification Profiles and their relevance within the ASN.
- WiMAX Interoperability and Testing and WiMAX Network Release Specifications.
- The WiMAX Forum Network Architecture Stage 2 and 3 - a closer look.
- The Other Players - the role of the IETF in the shaping of the ASN.
Section 2: WiMAX ASN Fixed Part Reference Points (1.5 hours)
- TThe WiMAX ASN Control Plane and Bearer Planes.
- Functions of the ASN Reference Points - R1, R2, R3, R4, R6 and R8.
- WiMAX ASN message transport, establishing control plane connections, the role and architecture of the WiMAX TLV (Type, Length, Value) protocol.
- WiMAX ASN control plane message sets for AAA, data path establishment, mobility and database interaction, analysis of the key message variables.
- WiMAX Identities - the role of the CID and SFID in data transport and routing, identity mapping between the R1 and R6/R4/R8 reference points.
- GRE (Generic Routing Encapsulation) - the use of GRE on the WiMAX ASN Bearer Plane, the GRE protocol architecture and use of the GRE key.
Section 3: Normal Mode Connections (1 hour)
- Configuring the WiMAX Base Station - channel pre-ambles and PN (Pseudo Noise) formats, sectorization of the site and management of the available channel bandwidth.
- The Broadcast messages - format, function and components of the UL and DL MAP, DCD and UCD. The role of DIUC and UIUC.
- Ranging - Initial, Invited and Periodic Ranging, -the format of the ranging window, CDMA based Initial Ranging, the Ranging CID, power and timing control during ranging, success, continue and abort messages, power control and fast feedback.
- Mobile Capability Negotiation - the scope of the capability set, physical, security and bandwidth considerations. SBC-REQ and SBC-RSP MAC messages, the NAI (Network Access Identifier), the role of the ASN Gateway for capabilities and initial AAA processes.
- Network Registration - format and content of the REG-REQ and REG-RSP MAC messages, allocation of Basic and Primary Management CID.
- Initial Service Flow Establishment - the use of the DSA-REQ and DSA-RSP MAC messages, allocation of initial SFID, DHCP in IP address allocation.
Section 4: Idle Mode Procedures (1.5 hours)
- Mobile WiMAX Idle Mode architecture, paging agents and paging controllers, location databases.
- Idle Mode Identities, WiMAX Paging Group ID, Paging Listening Intervals, Paging Cycle and Paging Offset calculations, considerations for information to be retained during Idle Mode.
- Entry into Idle Mode, De-Registration, Idle Mode state change, Path Release message sets and Idle Mode timers.
- Mobility Management in Idle Mode, Neighbour Advertisements, Cell selection and reselection and Location Update procedures.
- Network Re-Entry, Paging, Mobile State Change, Dynamic Service Addition and Path Establishment.
Section 5: WiMAX Fixed Transport (1.5 hours)
- The WIMAX Mobility Management State Model, considerations for mobile and fixed WiMAX deployments.
- The role of Ethernet in WiMAX, Challenges of deploying Ethernet, timing, QoS and Aggregation architecture, the Metro Ethernet Forum.
- The Ethernet and IEEE 802.3 protocols, Layer 2 switching and the switched Ethernet architecture, Ethernet VLANs and the role of VLANs in the WiMAX ASN.
- VLAN Tagging, 802.1P and 802.1Q.
- WiMAX ASN QoS (Quality of Service) Application classes and requirements, IP DiffServ and MPLS.
Section 6: Security Protocols (1 hour)
- WiMAX security architecture and establishment of security associations.
- WiMAX AAA protocols, PKMv1 and PKMv2 architecture and operation, WIMAX Auth Relay protocol.
- EAP Methods, EAP SIM and EAP TLS operation.
- RADIUS Architecture, RADIUS protocol and use in the WiMAX architecture, limitations of RADIUS in Mobile WiMAX.
- Role of Diameter in WiMAX AAA, Diameter architecture and protocol operation.
Section 7: Service Flow, Policy Control and Charging (1.5 hours)
- Service Policy and Charging Rules, components of service policy, bit rate, error rates and jitter. Charging considerations, charging by time and volume, charging vectors and identities.
- Storage and distribution of policy and charging information, AAA policy servers, RADIUS and Diameter.
- Invoking policy and charging, push information elements, Service Flow provisioning in the ASN, ASN Service Flow architecture, Service Flow Management and Authentication.
- Data Path Establishment, Service Flow Granularity Cases 1,2 and 3.
- Service Flow State, Provisioned, Admitted and Active.
Section 8: WiMAX ASN Anchored Mobility (1.5 hours)
- WiMAX ASN Mobility Architecture, Handover Functions, role of the Base Station and ASN Gateway.
- Handover Types, Hard Handovers, Soft Handovers, Optimized Handovers, Diversity Sets.
- Handover considerations, timing, frame sync, frequency assignment and MAC frame formats.
- Cell Selection, DCD and MOB-NBR-ADV messages, triggers, CINR, RSSI.
- Handover Optimization, Scanning and Association, MOB_SCN-REQ and MOB_SCN-RSP messages, Association Levels 1, 2 and 3.
Section 9: CSN Anchored Mobility (1.5 hours)
- Mobile IP concepts and operation, the HA (Home Agent), FA (Foreign Agent), deployment in the ASN and CSN.
- Mobile IPv4 and Mobile IPv6, Home Address, Care of Address, MIP security keys and MIP AAA considerations.
- Use of Diameter and RADIUS in WiMAX MIP operation.
- PMIP (Proxy MIP) and CMIP (Client MIP), Establishment of MIP tunnels in WiMAX.
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