LTE UMB WiMax Presentation Final Elster

University of Kansas | School of Engineering

Similarities and Differences between LTE, UMB & WiMax

Presented By: Brandt Elster

Department of Electrical Engineering and Computer Science

University of Kansas | School of Engineering

OutlineWiMax News Definitions Background & History Motivations and Objectives Deterrents Services and QoS Network Architecture Physical Layer & MAC Protocols Comparison of the Technologies Future of the TechnologyDepartment of Electrical Engineering and Computer ScienceBrandt Elster 2/3/2013 Page 2 of 58

University of Kansas | School of Engineering

WiMax News Today Today there was a large announcement regarding the future of mobile WiMax Since Dan Hesse became the new Sprint CEO there were doubts he would continue

Sprints future in their WiMax venture named XOHM. Immediately upon becoming CEO he terminated an existing agreement to work along side Clearwire and collaborate on separate WiMax networks that were able to roam on each others to increase coverage

Today Sprint and Clearwire put out a joint press release stating they had formed a joint venture that would be named Clearwire to build one WiMax network. This new company has received investments from the following companies: Google, Intel, Comcast, Time Warner Cable, and Bright House networks These companies have combined together for a total investment of $3.2 billion They will receive an estimated 22% ownership of the company Sprint will maintain the largest share at 51% and Clearwire will control 27% The deal is estimated to be worth a total of $14.5 billionDepartment of Electrical Engineering and Computer ScienceBrandt Elster 2/3/2013 Page 3 of 58

University of Kansas | School of Engineering

Definitions - LTE Long Term Evolution is more commonly referred to as LTE LTE is the 4th generation network that was designed through the Third Generation

Partnership Project (3GPP). It is an all IP network Its primary goals were to improve efficiency, lower infrastructure costs, create a higher QoS, all while making use of new spectrum opportunities, and better integrating with other open standards Predominantly created by Ericsson, Nortel and Nokia-Siemens Should result in release 8 of the UMTS standard

Department of Electrical Engineering and Computer Science

Brandt Elster

2/3/2013

Page 4 of 58

University of Kansas | School of Engineering

Definitions - UMB Ultra Mobile Broadband is commonly referred to as UMB UMB is the 4th Generation wireless broadband access network developed through the CDMA

Development Group (CDG) It is an all IP network It was designed from the ground up to provide the type of access required in the modern mobile world, with great flexibility and interoperability Standardized by the 3rd Generation Partnership Project 2 (3GPP2) Proprietary technology developed by Qualcomm

Department of Electrical Engineering and Computer Science

Brandt Elster

2/3/2013

Page 5 of 58

University of Kansas | School of Engineering

Definitions - WiMax Mobile WiMax is short for Wireless Interoperability for Microwave Access There is actually a difference between mobile WiMax and fixed WiMax

Today we are only going to talk about the mobile version of WiMax WiMax is the 4th Generation wireless broadband access network developed by the IEEE It is the 802.16e or upcoming 802.16m standards It is an all IP network Many hardware manufacturers are already supporting WiMax due to its open standards. Some of the larger ones include Samsung, Motorola and Intel.

Department of Electrical Engineering and Computer Science

Brandt Elster

2/3/2013

Page 6 of 58

University of Kansas | School of Engineering

Background & History Analogy for the differences between TDMA, FDMA, SDMA, CDMA Take a large room with a decent number of people in it. There are multiple different

conversations going on throughout the room. TDMA Everyone in the room would take turns speaking. Each group of people would be assigned a specific time slot. FDMA Each group in the room would speak at a different pitch (frequency) far enough apart that they can be differentiated. SDMA Each groups speaker would talk in a specific direction, only people in front of them would be able to hear. If the room is big enough you could have multiple people speaking in the same direction as long as they were far enough apart. CDMA Each group would be assigned a specific language to communicate with. They would be able to easily discern their specific language and all others would be small and ignorable background noise.

Department of Electrical Engineering and Computer Science

Brandt Elster

2/3/2013

Page 7 of 58

University of Kansas | School of Engineering

Background & History OFDMA Basically an enhanced version of FDMA

Allows for the elimination of guard bands by using orthogonal signals. Signals are considered to be orthogonal if their dot products are equal to 0 Signals are able to overlap without causing interference to the other

Signals are modulated and demodulated using the Fast Fourier Transform SC-OFDM This is a single carrier equivalent of OFDMA Each transmission is given only one carrier This allows the peak-to-average power to be lower thus increasing the capable average power of the power amplifier This is helpful because the user terminal is generally battery powered and this includes both battery life and rangeDepartment of Electrical Engineering and Computer ScienceBrandt Elster 2/3/2013 Page 8 of 58

University of Kansas | School of Engineering

Background & History - LTE Part of the 3GPP standard Essentially it is HSPA rev 8 It was given the name Long Term Evolution by the 3GPP The name follows their generally naming scheme. They try to make their name represent their monopoly over the wireless arena GSM stands for Global Standard for Mobile & UMTS stands for Universal Mobile Telephone Standard

Originally started as GSM Capable of virtually no data communications Pioneered the first short messaging service (SMS)

Supports handoffs with all UMTS and GSM networks There is discussion to build in the ability to support handoffs with CDMA networks

Department of Electrical Engineering and Computer Science

Brandt Elster

2/3/2013

Page 9 of 58

University of Kansas | School of Engineering

Background & History - LTE GSM was the 2G technology that both GPRS and EDGE are based on GPRS was the first step Stands for General Packet Radio Service It is considered to be a 2.5G Capable of speeds from 56 up to 114 kbit/s Supports a very robust voice channel and low bandwidth data options. Main data use was text internet & downloading of reduced size pictures and music

Department of Electrical Engineering and Computer Science

Brandt Elster

2/3/2013

Page 10 of 58

University of Kansas | School of Engineering

Background & History - LTE EDGE was the next step Stands for Enhanced Data rates for GSM Evolution

It is considered to be a 2.75G Capable of speeds from 1 Mbit/s Reduced latency to 100 ms However just like GPRS, the main data use was text internet & downloading of reduced size pictures and music

Department of Electrical Engineering and Computer Science

Brandt Elster

2/3/2013

Page 11 of 58

University of Kansas | School of Engineering

Background & History - LTE Following EDGE came UMTS Stands for Universal Mobile Telephone Standard

UMTS was the first truly 3G technology to come from 3GPP UMTS is a completely different technology than GSM. It required a completely new network be built over the top of any existing networks

UMTS uses W-CDMA instead of the TMDA that powered GSM The primary difference between W-CDMA and CDMA2000 is that W-CDMA uses 5 MHz blocks ofspectrum and CDMA2000 uses only 1.25 MHz blocks, hence where the wide came from

The first revision of UMTS was capable of speeds up to 2 MB/s

Department of Electrical Engineering and Computer Science

Brandt Elster

2/3/2013

Page 12 of 58

University of Kansas | School of Engineering

Background & History - LTE HSPA was the final step for W-CDMA HSPA stands for High Speed Packet Access

There are three different enhancements to HSPA, HSDPA, HSUPA and HSOPA HSDPA stands for High Speed Downlink Packet Access It predominantly increases the download speed of the network. HSUPA stands for High Speed Uplink Packet Access It predominantly increases the upload speed of the network HSOPA stands for High Speed OFDM Packet Access This technology replaces the entire infrastructure of UMTS and replaces it with a new OFDM infrastructure It is a separate technology from LTE but is part of the overall picture. Most likely it will never be implemented but its technologies will be morphed into LTE

Department of Electrical Engineering and Computer Science

Brandt Elster

2/3/2013

Page 13 of 58

University of Kansas | School of Engineering

Background & History - LTE Table of different UMTS Technologies and their specifications:

Technology UMTS HSDPA HSUPA HSOPA LTE

Release Data 2000 2000 2005 2009 2010

Downlink Speed 384 kb.s 7.2 Mb/s 7.2 Mb/s 100 Mb/s 100 Mb/s

Uplink Speed 128 kb/s 384 kb/s 5.76 Mb/s 50 Mb/s 50 Mb/s

Department of Electrical Engineering and Computer Science

Brandt Elster

2/3/2013

Page 14 of 58

University of Kansas | School of Engineering

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