WCDMA Air Interface

"WCDMA Air Interface" course gives the detailed description of the WCDMA FDD technology and its use in the UMTS network. The training focuses on physical layer operation and procedures and other functions closely related with the physical layer. The training presents functionality related with the use of R99 dedicated channels, as well as, HSPA.

Target audience

Radio network planning and design engineers, radio network tuning engineers and access transport network design engineers. It is recommended for personnel who need an understanding of the WCDMA air interface.

Training contents

  • Introduction
    (network architecture, UMTS R99/R3, UMTS R4, UMTS R5, UMTS R6, UMTS domain architecture, UTRAN, RNC, Node B, UE & USIM, area concept, numbering and identification),
    (multiple access, duplex division, 3G radio spectrum, WCDMA overview, main principles, advantages and problems, spreading process, channelisation, scrambling, filtering and modulation),
  • Channels
    (radio channels, physical channels, transport channels, logical channels, channel mapping, channels and protocol layers),
  • Quality of Service
    (QoS architecture, UMTS QoS classes, sources of service attributes, UMTS bearer service attributes, RAB service attributes, radio bearer service attributes, RAN access & CN bearer service attributes),
  • Channel coding
    (source coding, AMR, channel coding, error detection, error correction, interleaving, data flow through layer 1, TFCI and CCTrCH, coding for 12.2 speech, VBR, DTX, BTFD),
  • Power control
    (open-loop power control, inner-loop power control, outer-loop power control, power control in soft handover),
  • Multipath propagation
    (short and long time delay profile, rake receiver, downlink open loop transmit diversity, downlink closed loop transmit diversity),
  • Synchronisation and random access
    (downlink timing, cell search procedure, random access),
  • Idle mode
    (PLMN Selection, cell selection and reselection, system information, mobility management, paging, cell reselection between GERAN and UTRAN),
  • Handover
    (cell sets and measurements, soft/softer handover, events, signalling, time offset, handover between GERAN and UTRAN, hard handover, compressed mode),
  • Introduction
    (packet data access in R99, HSDPA characteristics, HSUPA characteristics),
  • Architecture and protocols
    (radio resource management, protocol architecture, impact on UTRAN interfaces, protocol states),
  • HSDPA channels
  • HSDPA operation
    (link adaptation, HS-DSCH coding and HARQ, serving HS-DSCH cell change, measurements, compressed mode, terminal capabilities),
  • HSUPA channels
  • HSUPA operation
    (E-DCH channel coding, HARQ, two TTI lengths, measurements, MAC-es and MAC-e, E-TFC selection, HSUPA scheduling, serving E-DCH cell change, compressed mode, terminal capabilities),
  • HSPA +
    (multi-antenna transmission: Multiple Input Multiple Output - MIMO, Higher Order Modulation: 64 QAM DL and 16 QAM UL, Continuous Packet Connectivity - CPC, Enhanced FACH, Enhanced RACH, Fast Dormancy, HSPA voice support: VoIP over HSPA and CS Voice over HSPA, flatter architecture, integrated RNC/Node B, HSPA multicarrier operation, terminal capabilities).


The participants should have a general technical knowledge about UMTS.

Training method

Lectures and theoretical exercises.


4 days