WiMAX System Overview

3 days

Download brochureThe course provides an end-to-end perspective of the mobile WiMAX (IEEE 802.16e) system, including the access and the core network domains. It presents in detail the architecture of the WiMAX system. Radio interface fundamentals are considered with explanation of OFDM, OFDMA and MIMO techniques. Subsequently QoS topic is used as a transition into the core network consideration. Core network session includes control plane and user plane definition, security and cooperation with IMS. The course outlines all the key WiMAX cross-system procedures such as network entry and exit, handover, paging, call setup etc. As final chapters, roadmaps for the new releases and features are given and the issues of interworking with other networks are raised.

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

OFDM, OFDMA and MIMO

• 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)
• FUSC, PUSC, OPUSC, AMC
• MIMO in WiMAX
• 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