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HSPA High Speed Packet Access. Aim.

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Presentation Transcript
  • This presentation aims to analyze the confusion and over sayings surrounding the relative merits of various wireless broadband technologies like WiMAX, EDGE and get to the real reasons that will influence the success of mobile broadband and its ability to deliver broadband for all and everywhere.
  • Introduction
  • Adoption
  • Architecture of HSPA
  • Comparison with WiMAX
introduction hspa
Introduction: HSPA
  • HSPA, the undisputed choice for mobile


  • HSPA offers operators a single network for multiple services.
  • HSPA a state-of-the art technology.
  • HSUPA is to follow HSDPA


  • High Speed Downlink Packet Access
  • High speed data enhancement for WCDMA/UMTS
  • Peak theoretical speeds of 14.4 Mbps
  • Current devices support 7.2 Mbps throughput
  • Methods used by HSDPA
      • Short transmission time interval (TTI)
      • Fast scheduling and user diversity
      • Higher-order modulation
      • Fast link adaptation
      • Fast hybrid automatic-repeat-request (HARQ)
  • High Speed Uplink Packet Access
  • 85% increase in overall cell throughput on the uplink
  • Achievable rates of 1 Mbps on the uplink
  • Reduced packet delays to as low as 30 msec
  • Methods used by HSUPA:
      • An enhanced dedicated physical channel
      • A short TTI, as low as 2 msec, which allows faster responses to changing radio conditions and error conditions
      • Fast Hybrid ARQ, which improves the efficiency of error processing

GGSN- Gateway GPRS Support Node

SGSN- Serving GPRS Support Node

RNC- Radio n/w Controller

DHCP-Dynamic Host Configuration


HSS-Home subscriber server

PCRF-Policy Control & Charging Rules Function

  • HSPA is a Frequency Division Duplex (FDD) technology, in which the uplink and downlink are in separate frequency channels (usually denoted as 2x5MHz).
  • RNC- Radio Network controller
  • That is connected between Base Stations and Core Network.
  • HSPA is a Frequency Division Duplex (FDD) technology. Mobile WiMAX is a Time Division Duplex (TDD) technology,
  • uplink and downlink frequency channels
  • HSPA+ Objectives
    • Achieve performance close to LTE in 5 MHz of spectrum.
    • Provide smooth internetworking between HSPA and LTE, thereby facilitating the operation of both technologies.
    • Allow operation in a packet-only mode for both voice and data.
    • Facilitate migration from current HSPA infrastructure to HSPA+ infrastructure.
hspa hspa one tunnel architecture
HSPA/HSPA+ One Tunnel Architecture

GGSN- Gateway GPRS Support Node

SGSN- Serving GPRS Support Node

RNC- Radio n/w Controller

future perspective
  • However, HSPA is only one step in the evolution of mobile broadband.
  • Delivering peak rates of 14Mbps in the downlink and 5.8Mbps in the uplink today, its evolution adds support for MIMO and 64QAM that will deliver 42Mbps in the downlink and 11.5Mbps in the uplink.
  • In parallel, LTE will deliver further enhancements in peak rates (exceeding 100Mbps), in addition to scalable channel bandwidths using OFDMA with both TDD and FDD operation. LTE and HSPA-evolved offer maximum spectrum flexibility while delivering true high-speed, high-quality 4G performance.
  • HSPA is the undisputed leader in mobile broadband services covering both traditional mobile terminals and personal consumer devices such as notebooks, ultra mobile PCs, cameras, portable game consoles and music players
  • Economically viable and affordable with respect to rest of Gadgets of ecosystem.
  • Ever-improving performance, with commercially-proven transmission bit-rates of up to 14Mbps today and up to 42Mbps in the near future
  • highly economic urban and rural coverage, with up to 200km cell range and measured speeds in excess of 2Mbps at the cell border

[1] 3G Americas, ‘Mobile Broadband: EDGE, HSPA and LTE’, September 2006, www.3gamericas.org/English/Technology_Center/WhitePapers/

[2] Ericsson white paper, “Basic Concepts of HSPA”, February 2007.

[3] Nokia: “A Comparison between EDGE and Alternative Technologies,” June 5, 2001, www.3gamericas.org

[4] http://www.rysavy.com/papers.html, May 2007

[5] www.ericsson.com