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

More documents

Recommendations

Info

Figure 54: Load Balancing with Heterogeneous Networks. 130For further details, refer to the December 2009 3G Americas’ white paper, “The Benefitsof SON in LTE.”Broadcast/Multicast ServicesAn important capability for 3G and evolved 3G systems is broadcasting and multicasting,wherein multiple users receive the same information using the same radio resource. Thiscreates a much more efficient approach for delivering content such as video programmingto which multiple users have subscriptions. In a broadcast, every subscriber unit in aservice area receives the information, whereas in a multicast, only users withsubscriptions receive the information. Service areas for both broadcast and multicast canspan either the entire network or a specific geographical area. Because multiple users ina cell are tuned to the same content, broadcasting and multicasting result in muchgreater spectrum efficiency for services such as mobile TV.3GPP defined highly-efficient broadcast/multicast capabilities for UMTS in Release 6 withMBMS. Release 7 includes optimizations through a solution called multicast/broadcast,single-frequency network operation that involves simultaneous transmission of the exactwaveform across multiple cells. This enables the receiver to constructively superposemultiple MBSFN cell transmissions. The result is highly efficient, WCDMA-based broadcasttransmission technology that matches the benefits of OFDMA-based broadcastapproaches.LTE will also have a broadcast/multicast capability. OFDM is particularly well-suited forbroadcasting, because the mobile system can combine the signal from multiple base130 Source: 3G Americas’ member contribution.Transition to 4G: 3GPP Broadband Evolution to IMT-Advanced, Rysavy Research/3G Americas, Aug 2010 Page 116
stations, and because of the narrowband nature of OFDM. Normally, these signals wouldinterfere with each other. As such, the LTE broadcast capability is expected to be quiteefficient.Figure 55: OFDM Enables Efficient BroadcastingAn alternate approach for mobile TV is to use an entirely separate broadcast network withtechnologies such as Digital Video Broadcasting–Handheld (DVB-H) or Media ForwardLink Only (MediaFLO), which various operators around the world have opted to do.Although this requires a separate radio in the mobile device, the networks are highlyoptimized for broadcast.Despite various broadcast technologies being available, market adoption has beenrelatively slow. Internet trends favor unicast approaches, with users viewing videos oftheir selection on demand.EPC3GPP is defining EPC in Release 8 as a framework for an evolution or migration of the3GPP system to a higher-data-rate, lower-latency, packet-optimized system thatsupports multiple radio-access technologies. The focus of this work is on the packetswitcheddomain with the assumption that the system will support all services—includingvoice—in this domain.Although it will most likely be deployed in conjunction with LTE, EPC could also bedeployed for use with HSPA+ wherein it could provide a stepping-stone to LTE. EPC willbe optimized for all services to be delivered via IP in a manner that is as efficient aspossible—through minimization of latency within the system, for example. It will supportservice continuity across heterogeneous networks, which will be important for LTEoperators who must simultaneously support GSM-HSPA customers.One important performance aspect of EPC is a flatter architecture. For packet flow, EPCincludes two network elements, called Evolved Node B (eNodeB) and the Access Gateway(AGW). The eNodeB (base station) integrates the functions traditionally performed by theradio-network controller, which previously was a separate node controlling multiple NodeBs. Meanwhile, the AGW integrates the functions traditionally performed by the SGSNTransition to 4G: 3GPP Broadband Evolution to IMT-Advanced, Rysavy Research/3G Americas, Aug 2010 Page 117
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 and 40:
attempts, no terrestrial wireless-d
Page 41 and 42:
DownlinkPeakNetworkSpeedPeakand/orT
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
Page 93 and 94: Figure 39: HSPA One-Tunnel Architec
Page 95 and 96: Figure 40: High-Speed Forward Acces
Page 97 and 98: elatively straightforward changes i
Page 99 and 100: on LTE began in 2004 with an offici
Page 101 and 102: Figure 45: LTE OFDMA Downlink Resou
Page 103 and 104: 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
Page 111 and 112: Beyond wider bandwidths, LTE-Advanc
Page 113 and 114: As discussed in more detail in the
Page 115: Different technologies spanning Wi-
Page 119 and 120: Support for new radio-access networ
Page 121 and 122: AbbreviationsThe following abbrevia
Page 123 and 124: 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
show all

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

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?