eHSPA-Evolved High Speed Packet Access

eHSPA-Evolved High Speed Packet Access

The eHSPA–Evolved High Speed Packet Access course provides a detailed description of the UTRAN layer 1 and layer 2 protocol functionality introduced in 3GPP Release 5 (HSDPA) and Release 6 (HSUPA). Special focus is on the new Medium Access Control protocol entities (MAC-hs, MAC-ehs, MAC-e, MAC-es, MAC-i, MAC-is) and on the usage, coding and timing of the new physical channels (e.g. HS-SCCH, HS-DPCCH, E-AGCH, E-RGCH). The Hybrid-ARQ (HARQ) functionality for both downlink and uplink is described in detail. A description of various HSPA downlink/uplink packet-scheduling mechanisms is also included. Selected HSPA signalling flows (RRC and NBAP) are described in detail (parameter level).

The course also covers the functionality introduced in 3GPP Releases 7—9 under the name Evolved HSPA (eHSPA).

High Speed Packet Access Introduction

• HSDPA/HSUPA: reason to be
• HSDPA/HSUPA basic concepts and principles
• Comparison of radio resource handling and adaptation in UMTS, HSDPA, and HSUPA
• Summary of features added in different 3GPP releases
• Available UL/DL bitrates in different releases
• Terminal Capabilities
• UE categories defined for HSDPA and HSUPA

eHSPA Medium Access Control Protocols

• MAC-hs functionality, MAC-hs PDU formats
• Priority queues, queue distribution, reordering and dis-assembly functions
• MAC-e/es functionality, MAC-e and MAC-es PDU formats
• E-TFC selection and HARQ profiles
• MAC-ehs functionality, MAC-ehs PDU formats
• MAC-i functionality, MAC-is PDU formats
• MAC-d flow concept for HS-DSCH and E-DCH

Signalling Procedures

• HSPA cell configuration
• HSDPA resource allocation (Radio Bearer and Radio Link setup)
• HSUPA resource allocation (Radio Bearer and Radio Link setup)

Hybrid-ARQ

• Hybrid-ARQ type I and II
• Redundancy Version selection through rate matching
• 16QAM/64QAM constellation rearrangement
• HARQ process activation/deactivation
• HARQ process memory allocation
• ACK/NACK pre- and post-ambles

eHSPA Physical Layer

• Functionality and timing of HSDPA physical channels (HS-PDSCH, HS-DPCCH and HS-SCCH)
• Functionality and timing of HSUPA physical channels (E-AGCH, E-RGCH, E-DPDCH, E-DPCCH, E-HICH)
• Fractional DPCH (F-DPCH)
• Channel coding details for most of the HSPA channels
• CQI reporting and TFRI selection
• HS-DSCH power and code allocation options

Packet Scheduling

• Downlink channel dependent scheduling through CQI reporting
• Uplink scheduling by (primary/secondary) Absolute and Relative Grants
• Examples of basic scheduling algorithms: Round Robin, Max C/I, Proportional Fair
• Input to the NodeB schedulers (CQI reports, Happy bit, Scheduling Requests, QoS etc)

Continuous Packet Connectivity (CPC), Enhanced Layer 2

• Enhanced Cell_FACH state for HSDPA and HSUPA
• Feedback-less operation
• HS-DSCH reception in Cell/URA_PCH
• E-DCH usage in Idle and Cell_FACH states
• Reduced protocol overhead through layer 2 enhancements (MAC-ehs, MAC-i/-is protocols, flexible RLC PDU sizes, MAC segmentation)
• UL DPCCH gating and new UL DPCCH slot format for reduced uplink interference
• DRX operation for HS-SCCH, E-AGCH, E-RGCH and F-DPCH
• HS-SCCH less operation and blind decoding of Transport Formats
• HS-SCCH Format 1, 2 and 3 and HS-SCCH Orders for DTX/DRX
• Direct UP Tunnel RNC-GGSN

MIMO and Dual Cell Operation

• SIMO, MISO, and MIMO overview
• MIMO transmitter details for HSDPA
• CQI and PCI reporting in MIMO mode
• New UE categories for MIMO, Dual Cell operation, and combined MIMO-DC-HSDPA
• Additional ACK/NACK formats for MIMO and Dual Cell operation
• De/activation of secondary carriers via HS-SCCH orders

The eHSPA–Evolved High Speed Packet Access training course has been developed for telecom professionals working with system engineering, hardware and software development, testing and verification.