3GPP Broadband Evolution to IMT-Advanced - 4G Americas

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Data ThroughputData throughput is an important metric for quantifying network throughput performance.Unfortunately, the ways in which various organizations quote throughput statistics varytremendously. This often results in misleading claims. The intent of this paper is torealistically represent the capabilities of these technologies.One method of representing a technology’s throughput is what people call “peakthroughput” or “peak network speed.” This refers to the fastest possible transmissionspeed over the radio link, and it is generally based on the highest order modulationavailable and the least amount of coding (error correction) overhead. Peak network speedis also usually quoted at layer 2 of the radio link. Because of protocol overhead, actualapplication throughput may be 10 to 20 percent lower (or more) than this layer-2 value.Even if the radio network can deliver this speed, other aspects of the network—such asthe backhaul from base station to operator-infrastructure network—can often constrainthroughput rates to levels below the radio-link rate.Another method is to disclose throughputs actually measured in deployed networks withapplications such as File Transfer Protocol (FTP) under favorable conditions, whichassume light network loading (as low as one active data user in the cell sector) andfavorable signal propagation. This number is useful because it demonstrates the highend,actual capability of the technology. This paper refers to this rate as the “peak userrate.” Average rates, however, are lower than this peak rate and difficult to predict,because they depend on a multitude of operational and network factors. Except when thenetwork is congested, however, the majority of users should experience throughput rateshigher than one-half of the peak-achievable rate.Some operators, primarily in the US, also quote typical throughput rates. These rates arebased on throughput tests the operators have done across their operating networks andincorporate a higher level of network loading. Although the operators do not disclose theprecise methodology they use to establish these figures, the values provide a goodindication of what users can typically expect.Table 5 presents the technologies in terms of peak network throughput rates, peak userrates(under favorable conditions) and typical rates. It omits values that are not yetknown such as those associated with future technologies.The projected typical rates for HSPA+ and LTE show a wide range. This is because thesetechnologies are designed to exploit favorable radio conditions to achieve very highthroughput rates. Under poor radio conditions, however, throughput rates are lower.Table 5: Throughput Performance of Different Wireless Technologies(Blue Indicates Theoretical Peak Rates, Green Typical)DownlinkUplinkPeakNetworkSpeedPeakand/orTypicalUser RatePeakNetworkSpeedPeakand/orTypicalUser RateEDGE (type 2 MS) 473.6 kbps 473.6 kbpsEDGE (type 1 MS)(Practical Terminal)236.8 kbps 200 kbpspeak70 to 135kbps typical236.8 kbps 200 kbpspeak70 to 135kbps typicalTransition to 4G: 3GPP Broadband Evolution to IMT-Advanced, Rysavy Research/3G Americas, Aug 2010 Page 40
DownlinkPeakNetworkSpeedPeakand/orTypicalUser RateEvolved EDGE(type 1 MS) 46 1184 kbps 47 1 Mbps peak350 to 700kbps typicalexpectedEvolved EDGE1894.4 50(type 2 MS) 49 kbps(DualCarrier)UplinkPeakNetworkSpeed473.6kbps 48947.2kbps 51Peakand/orTypicalUser Rate400 kbpspeak150 to 300kbps typicalexpectedUMTS WCDMA Release 99 2.048 Mbps 768 kbpsUMTS WCDMA Release 99(Practical Terminal)HSDPA Initial Devices(2006)384 kbps 350 kbpspeak200 to 300kbps typical1.8 Mbps > 1 MbpspeakHSDPA 14.4 Mbps 384 kbpsHSPA 52 InitialImplementationHSPA CurrentImplementation384 kbps 350 kbpspeak200 to 300kbps typical384 kbps 350 kbpspeak2 Mbps > 1.5 Mbps7.2 Mbps > 5 Mbpstypical 53 typicalpeak700 kbps to1.7 Mbpspeak500 kbps to1.2 Mbps7.2 Mbps 5.76 Mbps46 A type 1 Evolved EDGE MS can receive on up-to-ten timeslots using two radio channels and cantransmit on up-to-four timeslots in one radio channel using 32 QAM modulation (with turbo coding inthe downlink).47 Type 1 mobile, 10 slots downlink (dual carrier), DBS-12(118.4 kbps/slot).48 Type 1 mobile, 4 slots uplink, UBS-12 (118.4 kbps/slot).49 A type 2 Evolved EDGE MS can receive on up-to-6 timeslots using two radio channels and cantransmit on up-to-eight timeslots in one radio channel using 32 QAM modulation (with turbo coding inthe downlink).50 Type 2 mobile, 16 slots downlink (dual carrier) at DBS-12 (118.4 kbps/slot).51 Type 2 mobile, 8 slots uplink, UBS-12 (118.4 kbps/slot).52 High Speed Packet Access (HSPA) consists of systems supporting both High Speed Downlink PacketAccess (HSDPA) and High Speed Uplink Packet Access (HSUPA).53 Typical downlink and uplink throughput rates based on AT&T press release, June 4, 2008Transition to 4G: 3GPP Broadband Evolution to IMT-Advanced, Rysavy Research/3G Americas, Aug 2010 Page 41
Page 11 and 12: Quality of service (QoS). By priori
Page 13: Figure 4: WCDMA-HSPA Voice and Data
Page 16 and 17: It is clear that both EDGE and UMTS
Page 18: TechnologyNameType Characteristics
Page 21 and 22: Europe are providing operators with
Page 23 and 24: MHz, in Japan at 1500 MHz and in Eu
Page 25 and 26: and VoIP operation. These approache
Page 27 and 28: will be able to build applications
Page 29 and 30: Leveraging this success, operators
Page 31 and 32: VoIP for HSPA. Since LTE uses an IP
Page 33 and 34: Figure 10: Different Deployment Sce
Page 35 and 36: Figure 11: Radio Resource Managemen
Page 37 and 38: IEEE 802.16e-2005 and now IEEE 802.
Page 39: attempts, no terrestrial wireless-d
Page 43 and 44: DownlinkUplinkPeakNetworkSpeedPeaka
Page 45 and 46: Figure 13: HSDPA Performance of a 7
Page 47 and 48: Figure 15: HSPA+ Performance Measur
Page 49 and 50: Figure 17: LTE Throughput in Variou
Page 51 and 52: Figure 19: Latency of Different Tec
Page 53 and 54: Figure 20: Performance Relative to
Page 55 and 56: Figure 21: Comparison of Downlink S
Page 57 and 58: Incremental redundancy in error cor
Page 59 and 60: Figure 23: Comparison of Voice Spec
Page 61 and 62: Figure 24: Relative Volume of Subsc
Page 63 and 64: Technology EDGE/HSPA/LTE CDMA2000 W
Page 65 and 66: capacity of OFDMA-based approaches
Page 67 and 68: In this section, we consider differ
Page 69 and 70: To understand the evolution of data
Page 71 and 72: how EDGE functions including networ
Page 73 and 74: Alternatively, the original number
Page 75 and 76: In today’s EDGE systems, f12 thro
Page 77 and 78: DAS-9 16 QAM 217.6DAS-10 32 QAM 262
Page 79 and 80: Operators can also use their entire
Page 81 and 82: HSDPAHSPA refers to networks that s
Page 83 and 84: Figure 33: User DiversitySignal Qua
Page 85 and 86: Initial devices enabled peak user r
Page 87 and 88: “single-stream MIMO” or “MIMO
Page 89 and 90: Given the large amount of backhaul
Page 91 and 92:
connection between the network and
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Figure 39: HSPA One-Tunnel Architec
Page 95 and 96:
Figure 40: High-Speed Forward Acces
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elatively straightforward changes i
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on LTE began in 2004 with an offici
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Figure 45: LTE OFDMA Downlink Resou
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Single base-station antenna versus
Page 105 and 106:
TX antennas and most devices will o
Page 107 and 108:
Figure 48: Evolution of Voice in an
Page 109 and 110:
Table 19: IMT-Advanced Requirements
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Beyond wider bandwidths, LTE-Advanc
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As discussed in more detail in the
Page 115 and 116:
Different technologies spanning Wi-
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stations, and because of the narrow
Page 119 and 120:
Support for new radio-access networ
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AbbreviationsThe following abbrevia
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GBR - Guaranteed Bit RateGbyte - Gi
Page 125 and 126:
PHY - Physical LayerPMI - Precoding
Page 127 and 128:
Additional Information3G Americas m
Page 129 and 130:
Ericsson: HSPA voice migration, Jun
Page 131 and 132:
SNL Kagan: press release, “SNL Ka
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3GPP Broadband Evolution to IMT-Advanced - 4G Americas

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