WiMAX System Overview

Subject: 4G WiMAX
Category: General
Duration: 3 days

Course outline:

WiMAX Network Architecture

● The role of IEEE and WiMAX Forum
● WiMAX waves, releases and system profiles; WiMAX Forum certification
● Network nodes: MS, BS, ASN-GW, ASN, CSN
● Network interfaces: R1, R8, R6, R4, R3, R2
● ASN Profiles


● Fundamentals of multipath propagation (selectivity in time, frequency and space)
● Serial vs. parallel transmission, multicarrier transmission
● OFDM subcarriers and subcarrier separation, cyclic prefix, IFFT/FFT processing
● OFDM transceiver processing
● Multiuser diversity and OFDMA
● Multiple access with OFDMA
● Multiple antenna concept
● Open and closed loop spatial multiplexing
● Multi-user MIMO

WiMAX Access Network and Radio Interface

● WiMAX air interface protocol stack
● Responsibilities of the PHY layer
● TDD and FDD radio frames
● Channels and signals (preambles, DL-MAP, UL-MAP, DCD, UCD, FCH, Ranging, fast feedback channel)
● Overview of synchronization and ranging procedures
● MAC layer architecture

Quality of Service in WiMAX

● Logical connections, service flows and traffic flows
● Identifiers: SFID, CID
● MAC states and packet processing
● Mapping between PDUs, service flows, connections and service classes
● QoS classes: UGS, rtPS, nrtPS, BE
● QoS-aware scheduling

WiMAX Core Network

● User Plane and Control Plane
● Mapping of network functions to nodes
● MS state states (registered, deregistered, sleep, awake)
● Subscriber identities and their relations
● Security protocol stack
● VoIP call establishment via IMS

WiMAX Cross-system Procedures

● Network Entry and Exit
● Call setup
● Location update
● Handover
● Handover types (macro-diversity HO, hard HO, fast BS switching)

WiMAX Features Roadmap (up to WiMAX Forum Rel 2.0)

● Overview of features in the WiMAX Forum Rel. 1.0 and 1.5
● Features expected in WiMAX Rel 2.0
● Bandwidth aggregation up to 100 MHz and new bands
● The use of relays
● MIMO improvements (including up to 8 streams in the downlink, collaborative MIMO in the downlink)
● MBSFN and Self-organizing Networks (SON)
● Fractional Frequency Reuse

Overview of alternative systems and interworking considerations

● Overview of 3GPP-LTE architecture
● Summary of 3GPP-LTE radio access techniques
● Roaming: data access via home network and data access via visited network
● Inter-working with 3GPP E-UTRAN and CDMA 2000 networks

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