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Industry-supported field trials are already demonstrating the viability of many of thetechnical concepts in LTE-Advanced. The approach is to increase data rates for allusers, bring more out of small cells, dynamically adapt to network load and use ofmore carriers for more speeds. Also there will be unprecedented ecosystem of handset-manufacturer, software-developers and chip-designers that will support this intelligentnetwork.In this presentation we will briefly discuss principle technologies that are being adoptedin LTE-Advanced. We will understand the basics of the technologies that are underdevelopmental stages and look if we can contribute to their future enhancements.
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INTRODUCTION
• LTE Advanced is a mobile communication 4G standard approved by International Telecommunications Union (ITU) in Jan 2012 [1].
• Standardized by the 3rd Generation Partnership Project (3GPP) as a major enhancement of the Long Term Evolution (LTE) standard.
• It incorporates many enhancements including the aggregation of multiple radio channels, advanced antenna techniques, advanced network topology and others.
LTE-Advanced Features • Peak data rates: downlink - 1 Gbps; uplink - 500 Mbps.
• Spectrum efficiency: 3 times greater than LTE.
• Peak spectrum efficiency: downlink - 30 bps/Hz; uplink - 15 bps/Hz.
• Spectrum use: the ability to support scalable bandwidth use and spectrum aggregation where non-contiguous spectrum needs to be used. the lower and upper bandwidths limits are 40 MHz and 100 MHz.
• Latency: from Idle to Connected in less than 50 ms and then shorter than 5 ms one way for individual packet transmission.
• Cell edge user throughput to be twice that of LTE.
• Average user throughput to be 3 times that of LTE.
• Compatibility: LTE Advanced shall be capable of interworking with LTE and 3GPP legacy systems.
Principal technologies
• SON ( Self-Optimizing Networks).
• Carrier aggregation of contiguous and non-contiguous spectrum allocations.
• Range expansion with Interference management and suppression
• CoMP (Coordinated Multipoint transmission & reception).
• Relaying.
• Higher order MIMO.
• Heterogeneous network support.
• all-IP Flat Architecture.
• Self-Optimizing Networks
Self configuration Self optimization Self healing
Source of Figure: [4]
• Coordinated Multipoint transmission & reception
• Joint processing:
• Coordinated scheduling or beamforming:
Source of Figure: [3]
CONCLUSION • Industry-supported field trials are already demonstrating the
viability of many of the technical concepts in LTE-Advanced.
• LTE-Advanced meets all 4G requirements and ITU officially certified it as 4G.
• Nevertheless, the timing of LTE-Advanced deployment is difficult to predict and will be dependent on industry demand and the success of today’s Release 8 and 9 LTE rollouts.
REFERENCES
1. "IMT-Advanced standards for mobile broadband communications," ITU NEWS, www.itunews.itu.in , Jan 2012.
2. "Introducing LTE-advanced,“ Agilent Technologies, www.agilent.com/finnd/LTE, Application Note, Nov 2010.
3. "4G Mobile Broadband Evolution: 3GPP Release 10 and Beyond," 4G Americas, www.4gamericas.org, White Paper, Feb 2011.
4. "Self-Optimizing Network: The benefits of SON in LTE," 4G Americas, www.4gamericas.org, White Paper, July 2011.
5. "LTE Advanced: Heterogeneous Networks,“ Qualcomm, http://www.qualcomm.com/solutions/wireless-networks/technologies/lte-advanced, White Paper, Jan 2011.
3GPP Organizational Partners
Market Representation Partners • IMS Forum • TD-Forum • GSA • GSM Association • IPV6 Forum • UMTS Forum • 4G Americas • TD SCDMA Industry Alliance • InfoCommunication Union • Femto Forum • CDMA Development Group • Cellular Operators Association of India
(COAI) • NGMN Alliance
• Association of Radio Industries and Businesses (ARIB) Japan
• Alliance for Telecommunications Industry Solutions (ATIS) USA
• China Communications Standards Association (CCSA) China
• European Telecommunications Standards Institute (ETSI) Europe
• Telecommunications Technology Association (TTA) Korea
• Telecommunication Technology Committee (TTC) Japan
Specific requirements of the IMT-Advanced report included:
• all-Internet Protocol (IP) packet switched network.
• Interoperability with existing wireless standards.
• A nominal data rate of 100 Mbit/s at high speeds and 1 Gbit/s in fixed positions.
• Dynamically share and use the network resources to support more simultaneous users per cell.
• Scalable channel bandwidth 5–20 MHz, optionally up to 40 MHz.
• Peak link spectral efficiency of 15 bit/s/Hz in the downlink, and 6.75 bit/s/Hz in the uplink (meaning that 1 Gbit/s in the downlink should be possible over less than 67 MHz bandwidth).
• System spectral efficiency of up to 3 bit/s/Hz/cell in the downlink and 2.25 bit/s/Hz/cell for indoor usage
• Seamless connectivity and global roaming across multiple networks with smooth handovers[.
• Ability to offer high quality of service for multimedia support.
SON ARCHITECTURE
• Base Station Self-Configuration
• Automatic Neighbor Relation (ANR)
• Tracking Area Planning
• PCI Planning
• Load Balancing
• Mobility Robustness / Handover Optimization
• RACH (Random access channel) Optimization
• Inter Cell Interference Coordination
• Energy Savings
• Celloutage Detection And Compensation
• Coverage And Capacity Optimization
Common LTE FDD & TDD Chipset Platform
• MODEMS & DATA CARDS
• SMARTPHONES & TABLETS
