UMB TechnologyOverview

Ultra Mobile Broadband

Technology Overview and Competitive Advantages

QUALCOMM Incorporated January 2008

Table of Contents

Executive Summary .............................................................................. 1

[1] UMB: Competitive Advantages ........................................................ 3

1.1 Fast Time to Market................................................................. 3

1.2 Unsurpassed Mobile Broadband Performance ....................... 4

1.3 Flexible Deployment Options .................................................. 7

1.4 Inherently Designed for Real-time Services ............................ 8

1.5 Flexible IP-based Network Architecture .................................. 9

[2] Key UMB Design Features .............................................................. 9

2.1 OFDMA.................................................................................. 10

2.2 Advanced Antenna Techniques ............................................ 10

2.3 RL Sector Capacity Optimizations......................................... 12

2.4 Adaptive Interference Management Mechanisms................. 12

2.5 Efficient RL Control Design ................................................... 15

2.6 Low-Overhead Signaling ....................................................... 15

2.7 Fast Seamless Handoffs ....................................................... 16

2.8 Multi-carrier Support and Beacons........................................ 16

2.9 Enhanced Terminal Battery Life ............................................ 17

2.10 Flexible IP-based Network Architecture ............................ 18

[3] Conclusions.................................................................................... 20

01/2008 page i

Ultra Mobile Broadband Technology Overview and

Competitive Advantages

Executive Summary Ultra Mobile Broadband (UMB) is the leading mobile broadband OFDMA solution that utilizes wider bandwidths (up to 20 MHz) to produce an ultra fast user experience. Bringing high-quality mobile broadband access to the mass market, UMB increases network capacity, enhances user experience, and elevates support for a plethora of multimedia applications. Optimized for an ultra mobile broadband experience and designed for efficient support of real-time services such as VoIP, UMB is at the center of the convergence trend for communication, computing, and consumer electronic platforms.

UMB leverages a track record of technology leadership and industry partnerships that brought to fruition hundreds of 3G devices, ranging from embedded laptops to very low cost handsets. 3GPP2 standards and vendors have historically driven innovation. With UMB, operators can stay ahead of the competition by differentiating themselves through earlier delivery of advanced and robust solutions.

UMB is designed to provide broadband connectivity to users at speeds comparable to fixed line networks such as Ethernet and Cable/DSL while maintaining high-speed mobility. It supports peak rates up to 288 Mbps. Furthermore, UMB maximizes system capacity within an operators limited and valuable spectrum resources. UMBs significant competitive advantages can be summarized as follows:

Designed for high-speed data and VoIP in a mobile environment Ultra fast user experience maximizes revenue from all segments:

laptops, ultra-mobile PCs, handsets, consumer electronics, desktops

Lower costs for all services, based on higher data and VoIP capacity

Continued acceleration of advanced features in the 3GPP2 standards

3GPP2 track record of technology leadership, utilizing highly integrated ASICs and industry partnerships

3G systems today enable mobile broadband, with applications ranging from high-speed browsing, fast music downloads, video streaming, VoIP, video telephony to online gaming. With the higher uplink speeds of 3G networks, more and more users can access social networking sites on their mobile devices and upload user generated content.

01/2008 page 1



Looking forward, mobile broadband access will become ever more prevalent. Coupled with the current trend toward IP-based architectures, UMB is attractive to operators that are seeking to future-proof their

r can focus on high-demand areas first, falling back to 3G where there is no

P2.1

networks. Using UMB, an operator can efficiently deliver a range of multimedia and VoIP applications across multiple devices, creating exciting revenue opportunities across all market segments.

For existing 3G operators, UMB provides an opportunity to upgrade their networks in a phased manner. As shown in Figure 1, an operato

UMB coverage. Multimode devices supporting both UMB and the existing technologies will enable backward compatibility for UMB usersthat are not in UMB coverage. The UMB network support for seamlesshandoffs with 3G technologies is currently being developed in 3GP

Existing OperatorsExisting

Operators

GreenfieldOperatorsGreenfieldOperators

Figure 1. UMB Deployment Options Greenfield operators that do not have an existing network can also

DD frequency spectrum to imultaneously support both VoIP and mobile broadband applications.

ed CDMA a

half-day UMB seminar. Two full-protocol stack, over-the-air UMB demos

deploy UMB in available FDD or Ts

At CTIA 2007, eight major infrastructure and device OEMs joinDevelopment Group (CDG) to show support for UMB by participating in

were also demonstrated by two major UMB supporters. These demos displayed the impressive data rates and very low latencies that can be achieved by UMB while running simultaneous applications over the air such as high definition video streaming, video conferencing, web

1 Third Generation Partnership Project 2 (3GPP2) is a collaborative entity between five standards development organizations dedicated to evolving the CDMA2000 specifications.

01/2008 page 2



browsing, ftp uploads and downloads, as well as VoIP. Full mobility demos running such applications in handoff situations on highwayalso currently being demonstrated at the Qualcomm San Diego camp

By leveraging eight years of OFDM/A and MIMO (Multiple Input Multiple

s are us.

Output) experience, Qualcomm is able to bring UMB to the market in a

eld

Qualcomms next-generation Cell Site Modem (CSM) CSM8900 and 8900 solutions and reference designs

its competitive advantage with respect to other OFDMA solutions. UMB

Figure 2. Rapid Development, Commercialization by 1H09

fast and efficient manner. Qualcomms next-generation UMB chipset solutions are CSM8900 and MDM8900. MDM8900 engineering sampleswill be available Q1 2008; CSM8900 will be sampled in Q2 2008. Qualcomm is also developing a reference design with a complete L1-L3 implementation which enables rapid adoption of the technology. Fitrials for UMB are expected to get underway at the beginning of 2008 with commercial deployments targeted for mid-2009.

[1] UMB: Competitive Advantages

1.1 Fast Time to Market

Mobile Data Modem (MDM) MDMsupport the UMB standard. The CSM8900 cell-site solution features asingle-sector architecture and leverages Qualcomms Snapdragon technology for unsurpassed mobile broadband performance. The MDM8900 modem solution provides support for UMB traffic and interfaces with an MSM chipset to offer a complete mobile device solution that takes advantage of new services enabled by UMB.

Figure 2 shows the timeline for UMB commercialization, outlining

standardization (including the network architecture) was completed bythe end of 2007 in 3GPP2.

Rapid Development, Commercialization by 1H09

07 08 09

10

Mobility Demo

MDM & CSM Samples

Technical Mobility Trials

OEM Mobility Trials

Commercial Launch

MDM8900

CSM8900

CTIA Demo

Rapid Development, Commercialization by 1H09

07 08 09

MDM8900

10

Mobility Demo

MDM & CSM Samples

Technical Mobility Trials

OEM Mobility Trials

Commercial Launch

CTIA Demo

CSM8900

01/2008 page 3



1.2 Unsurpassed Mobile Broadband Performance

users with consistently high data rates regardless of a users location

e to a cell

r UMB.

connection times, and ability to

seamlessly handoff between cells are also important parameters when

rs

rk using applications such as VoIP. This is illustrated by

Figures 3-4 and Table 3. High capacity also enables higher user data

There are several important criteria to evaluate the performance of any airlink technologys performance:

Average and Cell-edge Data Rates Two important parameters in a field deployment are the average and cell-edge user data rates. UMBs

high rates, as shown in Table 1, enable a broadband network to serve its

within the cell.

Peak Data Rates Peak rates show the user experience clostower in an unloaded network. Table 2 shows the peak rates fo

Quality of Service Low latencies, fast

measuring performance. UMB provides minimum Ping latencies of less

than 16 msec, including the Ping request time2.

Cell Capacity Higher cell capacity allows for more simultaneous usewithin the netwo

rates to be transmitted to users for bursty traffic applications. In addition,

increased capacity lowers cost per bit which lowers the cost of all

services.

Increased Terminal Battery Life A long terminal battery life is crucial for an optimal user experience

2 Ping assumptions: 1st HARQ termination, 8 interlaces, Decode time of 2 slots, Req reliability of 90%, includes BW request latency, Backhaul delay 0

01/2008 page 4



The excellent mobile broadband experience offered by UMB is highlighted in the performance tables below.

Table 1: UMB FL Average and Cell-Edge User Data Rates

Table 2: UMB FL and RL Peak Data Rates

Table 3: UMB VoIP Sector Capacity

UMBs low overhead enables large number of VoIP calls to coexist with high capacity data services.

MIMO can increase the system capacity and the user data rates without using additional power or bandwidth, by transmitting multiple streams through multiple antennas at the receiver and transmitter. MIMO allows very high data rates, especially for users close to the base station, whenever it is possible to transmit multiple orthogonal streams. A rich scattering environment is required to ensure that the multiple data streams remain orthogonal. The MIMO benefit is therefore maximized in a dense urban (city) environment, as there is enough scattering, and for users close to the base station.

3 Single user/sector, 3GPP2 evaluation methodology, loaded scenario 4 takes into account user mobility, implementation margin and handoff conditions

FL User Data Rates3 10MHz FDD, 1x2 SIMO

Average 8.8Mbps

Cell-edge 2.0Mbps

BW 10 MHz FDD 20 MHz FDD

FL 135 288

RL 35 75

VoIP Calls per Sector4

10MHz FDD, 2 Rx eBS 500+

01/2008 page 5



Figure 3 presents the UMB forward link data capacity for 10 MHand a smaller cell, illustrating the benefit of adv

z FDD anced antenna

er MIMO techniques and the increasing performance with higher-ordusing the 3GPP2 simulation assumptions.

FL Sector (10 MHz FDD, 3GPP2 Assumptions)

1x2 2x2 4x2 4x40

5

10

15

5s

ers Cost per Bit (FL)

Capacity*

20

2M

bp

1x4

Figure 3. Higher Sector Capacity Low

Figure 4. Higher Sector Capacity Lowers Cost per Bit (RL)

ser/sector, full d scheduling.

RL Sector Capacity* MH D, 3GPP2 Assumptions)(10 z FD

12

14

16

Two Way Rx Diversity at eBS

Four Way Rx Diversity at eBS

0

2

4

6

8

10

Mbp

s

*Source: Qualcomm simulations 3GPP2 methodology, mixed channel model, 16 ubuffer traffic, 2.0 km site-to-site distance, SCW MIMO precoding in FL, no subban

01/2008 page 6



Figure 4 presents the UMB reverse link data capacity for 10 MHz FDD system using 3GPP2 simulation assumptions. The reverse linkcapacity can be improved by use of additional receive diversity antenHence additional eBS antennas provide bo

sector nas.

th forward link MIMO gains

MN Simulation

and reverse link capacity enhancements.

Figure 5. UMB 2x2 FL and 1x2 RL Performance Under NGAssumptions

Figure 5 presents the UMB forward link and reverse link data capacity for 10 MHz FDD using the NGMN simulation assumptions which are a subset of the 3GPP2 simulation environment resulting in ~25% higher capacities compared to the 3GPP2 simulation assumption numbers.

1.3 Flexible Deployment Options UMB offers a great deal of deployment flexibility allowing an operator to make best use of its spectrum resources. The options include:

FDD/TDD Modes UMB can be deployed in both FDD and TDD spectrum bands. FDD standardization was completed in April 2007 in 3GPP2.

Flexible Bandwidth Support from 1.25 MHz to 20 MHz - The standard supports spectrum allocations from 1.25 MHz up to 20 MHz. Wider bandwidths increase system throughput and offer

DL and UL Capacity10 MHz FDD, NGMN Assumptions

0

2

4

6

8

10

12

14

16

18

2x2 FL 1x2 RL

Mbp

s

higher user data rates.

01/2008 page 7



Asynchronous or Synchronous FDD In asynchronous deployments, each base station may have an independent timereference. The advantage of this is that it eliminates the need to synchronize base stations to an accurate external timing sourceThis is especially of interest for in-b

. uilding or underground

deployments. Synchronous operation, on the other hand, uses rmits the network to

Reuse UMB powerful interference

rference. nt without the need for

the deployment emes may also be ce management in

yments through its efficient multi-carrier design. With UMB, an operator may start with a 10 MHz deployment,

1.5, 1.7, 2.3, and 2.5 GHz are some examples of bands that can

many other bands.

UMB is designed from the ground up for efficient delivery of real-time serv esFor exa 10 MHz FD ile still having additional downlink capacity available for best effort traffic. UMB incorporates many techniques necessa

s

an external global timing source, and peoperate more efficiently. UMB allows for both types of deployments.

Robust Operation with Universal Frequencyenables robust deployments through its management techniques that control other-cell inteThese techniques allow for a deploymecareful frequency planning. Depending onscenario, fractional frequency reuse schused in addition to embedded interferenorder to minimize interference.

Efficient Multi-carrier Deployment Support UMB supports phased deplo

and add more bandwidth as demand increases.

Support for Various Frequency Bands UMB can be deployed in any new and vacant TDD or FDD frequency band.

be available for UMB, in addition to

1.4 Inherently Designed for Real-time Services

ic and can address a mix of real-time VoIP, video and web traffic. mple, UMB supports more than 500 VoIP users per sector in a D deployment, wh

ry for optimal real-time application support:

Very low-latency seamless handoff mechanisms utilizing fast PHY/MAC based handoff

01/2008 page 8



Advanced QoS mechanisms supporting different priority flowsimultaneously

Fast and low-overhead signaling to allocate/deallocate resources

Extremely efficient resource request and assignments, virtually eliminating delay and overhead

Low-latency access and fast resource requests by termwith minimal ov

s

inals, erhead

S

1.5 FleThe flat IPand the c The UMBfunctionsschedulin n control, user data ciphering and admission control, allowing the all-IP network to easily support mul leinter-eBinvolved ffic latency nd real-time commun ntly upgradeoperabi

The UM logies s being

o e

Advanced Antenna Techniques

upport for inter-technology handoffs

xible IP-based Network Architecture -based UMB network architecture decouples the radio access

ore network, improving scalability and deployment flexibility. Evolved Base Stations (eBS) integrate many radio access such as radio link control, IP packet classification, QoS g, header compression, admissio

tip access technologies. The UMB architecture supports a simple S interface and also reduces the number of network nodes in data processing and transport, which leads to improved traand better support of delay sensitive, interactive aications. In a UMB network, each eBS can be independed without impacting handoff performance. Cross-vendor inter-

lity is an additional benefit of the UMB architecture.

B network supports seamless handoffs with other technosuch as EV-DO and CDMA2000 1X. There are mechanismspecified in 3GPP2 that will facilitate interworking and roaming with current and upcoming cellular technologies.

[2] Key UMB Design Features UMB has incorporated many key technologies to enable the industry tmeet and exceed its next generation mobile broadband performancobjectives:

OFDMA

01/2008 page 9



RL Sector Capacity Optimizations

Adaptive Interference Management Mechanisms

Efficient RL Control Design

ns

A

is

2.2 Advanced Antenna Techniques

h as ultiple Access (SDMA) and

These techniques be used simultaneously or

Low-Overhead Signaling

Fast Seamless Handoffs

Multi-Carrier Support and Beaco

Enhanced Terminal Battery Life

Flexible IP-based Network Architecture

2.1 OFDMA UMB utilizes OFDMA for both the downlink and the uplink. OFDMA techniques employ Fast Fourier Transform (FFT) to segment the allocated bandwidth into smaller units which can then be shared amongst the users.

OFDMA and CDMA provide similar spectral efficiencies, with OFDMhaving a simpler implementation when used in wider bandwidths. In addition, the ability to use different FFT sizes for OFDM modulation allows implementation across multiple bandwidth allocations. FFT sizescaled accordingly based on the bandwidth of choice.

UMB delivers ultra fast user data rates throughout the cell. In addition toutilizing wider bandwidths (up to 20 MHz) for high data rates, UMB incorporates a number of advanced multiple antenna techniques sucMIMO/spatial multiplexing, Space Division Mbeamforming to achieve much higher user data rates.are complementary to each other, and canone at a time.

01/2008 page 10



Figure 6. Advanced Antenna Techniques

tial Multiplexing A MIMO transmission can

nal e

ng. MIMO transmission implies transmitting multiple simultaneous data streams (spatial multiplexing) to the user. The

t

plies close dge users typically do not

al

r powerful antenna technique that allows a base station to transmit simultaneously to multiple users that are spatially separated. Thus, even though the transmissions are simultaneous, the interference caused to the users is minimal. Allowing concurrent transmissions increases the sector capacity accordingly. Note that theres no additional

MIMO/Spasignificantly increase a users data rates, if the users mobileenvironment has a large degree of scattering (multiple sigreflections) and the received signal strength from the basstation is stro

benefit of MIMO is that the data rate gains are achieved withouallocating any additional power or bandwidth to the user. It should be noted however that multiplexing gains are possible only when the users channel has rich scattering and the user has a strong received SINR, which generally improximity to the cell tower. Thus, cell-ebenefit from MIMO.

Beamforming For cell-edge users with lower receive signstrengths, UMB utilizes beamforming techniques to increase their data rates by focusing the transmit power from the base station to the direction of the users.

SDMA SDMA is anothe

01/2008 page 11



terminal complexity required for SDMA. User feedback is needed in an FDD deployment scenario (users spatial location) and UMB provides the necessary uplink feedback channels for efficient SDMA operation.

2.3 RL Sector Capacity Optimizations UMB allows scheduling of users over the same RL subcarriers, and using the multiple antennas at the base station to suppress the intra-sector interference caused by simultaneous transmissions on the same resources. This technique increases the RL capacity and is named quasi-orthogonal RL in UMB. This operation does not add any complexity to the terminal.

Figure 7. RL Sector Capacity Optimizations

2.4 Adaptive InterferUMfreq inte B uses to minimize interference.

ble service

s. UMB also uses a technique where base stations can send

ence Management Mechanisms B ensures robust and efficient operation even with universal uency reuse, requiring no frequency planning. There are severalrference management techniques UM

Fast Distributed RL Power Control This technique tightly manages inter-sector interference to guarantee reliato delay-sensitive users, while ensuring high performance. Through RL distributed power control, each users transmit power is shaped by the interference it is causing to other sector

01/2008 page 12



frequent busy bits to quickly bring a terminals interference back to an acceptable level. This is important in situations where bursty traffic might result in a sudden increase of the interfeseen by a base station.

rence

erminal to independently

nal

Disjoint Link Support UMB allows a tselect the strongest FL and strongest RL sectors, ensuring strongest link performance in both directions. Since the termiis power controlled by the strongest RL sector, this also minimizes the interference the terminal is causing to other sectors. Disjoint link support is optional in the standard.

Figure 8. Disjoint Link Support

FL Service Sector RL Service Sector

FL traffic RL traffic

01/2008 page 13



terfering sectors. Both in RL and FL, the scheduler can dynamically allocate subcarriers to users for

h a

Fractional Frequency Reuse Fractional Frequency Reuse (FFR) techniques can also be used to improve cell-edge performance. With FFR, users at cell edge are put in reuse with respect to the strongest in

efficient interference control. Figure 9 shows an FFR deployment example. FFR favors cell-edge performance wittradeoff of reduced cell capacity.

Figure 9. Fractional Frequency Reuse

Flexband Flexband is a universal frequency reuse scheme, in which each sector uses an intelligent power tiering among subcarriers. This increases cell-edge data rates without affecting system capacity. Unlike traditional frequency reuse schemes which completely shut off unused subcarriers in one sector, Flexband uses all subcarriers in all sectors. The FL Scheduler schedules users closer to the base station to subcarriers with lower power, while the cell-edge users are scheduled to subcarriers with more power. Figure 10 shows Flexband in a 3-sector deployment. Note that the same technique can be used in multi-carrier UMB deployments as well.

01/2008 page 14



Figure 10. Fractional Frequency Reuse

2.5 Efficient RL Control Design In the uplink, UMB utilizes both OFchannel transmission.

CDMA Using CDMA allows foenables very low-latency transmiTransmissions from differesegment are multiplexed inorthogonal with respect to transmission is best suited fosensitive feedback channels. He

DMA and CDMA for RL control

r statistical multiplexing which ssions with minimal overhead.

nt terminals in the CDMA control a CDMA fashion, and are not each other. This type of control

r bursty/event-driven and latency-nce, Access, BW request and

control segment allowing very fast access and seamless handoffs.

r

2.6 LLow ove MB has flexible overhea

Control Overhead Adjustment The period of control channel transmissions in UMB can be changed within a sector. The

Handoff request channels are sent in the CDMA

OFDMA RL OFDMA control segment in UMB is used for periodic and reliable feedback channels such as MIMO and SDMA related feedback. Using OFDMA control segment reduces control overhead in scenarios with multiple periodic and higherate feedback channels per user.

ow-Overhead Signaling rhead signaling is essential for high spectral efficiency. U

resource and assignment management mechanisms to minimized while maximizing performance.

01/2008 page 15



power of control channels are also adjusted every PHY frame allowing the system to tailor the overhead required for signaling.

Persistent Assignments In UMB, the resources can be allocated in a persistent or non-persistent manner. A persistent assignment is valid as long as the assigned resource is in use, but the base station can also de-assign a persistent assignment with minimal delay if necessary. Persistent assignments are important to efficiently support delay-sensitive real-time

rhead. They eliminate bandwidth request latency for applications such as VoIP.

onous H-ARQ (Hybrid ARQ) e

aling overhead, as the resources for successive retransmissions are not independently scheduled.

2.7 Fast Seamless HandofUMB ensensitiv erving sector.

UMB utilizereverse lindelay of a hafast as 10ms

The hanand the RL. The hanstation via phsource seUMB, a termi rving sectors. To

all the base stations in the active

ons UM llexample nd to 20 MHz when the demand increases or when vacant spectrum

applications, and to reduce control ove

Synchronous H-ARQ Synchrwhich is used in both the UMB FL and RL also helps reducassignment sign

fs ables seamless handoffs so that the performance of a delay-e application (e.g., VoIP) is not affected by the change of s

s proven CDMA active set management techniques in the k to enable fast seamless L1/L2 based handoffs. The average

ndoff is less than 25ms, with intra-cell handoffs occurring as .

doff decisions in UMB are made by the terminal for both the FL doff requests are sent directly to the target base

ysical layer signaling, once the terminal decides that the rving sector is not the strongest sector anymore. Note that in

nal can have separate FL and RL sedecide on the best RL serving sector, set of a terminal send RL pilot strength indications so that the terminal can decide on the strongest RL.

2.8 Multi-carrier Support and BeacB a ows for phased deployments through its multi-carrier design. For

, an operator can start with a 10 MHz system and then expa

01/2008 page 16



becomewider baand the wider band terminals.

The Fle t power tiperform

The mu the use of b -carrier h onitor sectors operating on other carriers. Beacons can also be used in single-carr s f candida ts. A beacosingle to each

e interference caused by a beacon in time and frequency.

s available. UMB can concatenate two channels to support a nd system, which concurrently supports both the narrowband

xband technique explained in Section 2.4, which allows intelligenering among carriers, can also be used to further optimize ance.

lti-carrier operation in UMB is seamless to the user due toeacons. Beacons act as out-of-band pilots to enable fast multiandoffs, eliminating the need for tune-away operation to m

ier ystems to perform fast acquisitions, enabling early discovery ote Active Set members and reducing the need for neighbor lisn is an OFDM symbol where all of the power is transmitted on a ne. Each sector transmits a sequence of beacons on

carrier in a multi-carrier deployment. Thbeacons is minimal. Figure 11 shows

Figure 11. A beacon is an OFDM symbol with all power transmitted in a single tone.

2.9 Enhanced Terminal Battery Life UMB has several mechanisms to extend the battery life of a terminal:

Quick-paging The power consumption of a standby terminal ke up to receive the

age

depends on how frequently it needs to wapages, as well as the energy spent during each page period. UMB uses a quick-paging process in which the terminals only need to be awake less than half a millisecond to get their p

01/2008 page 17



indicators. This significantly improves standby mode power consumption.

Selected Interlaces Discontinuous transmissions and

s its ode power consumption.

ened by distributing the functionality to various other nodes. The target

rk (CAN) specification shows the network nodes in

Figure 1

receptions allow a terminal to turn off its transmitter and/or receiver on selected traffic periods (interlaces). This reduceactive m

Semi-connected State UMB terminals have the ability to maintain their connection ID while powering down between bursts of data transmission. Fast access mechanisms then allow the terminal to return to active state when needed with minimal delay. Power savings could be substantial, especially during bursty applications such as web browsing.

2.10 Flexible IP-based Network Architecture UMB supports a flexible IP network architecture where the traditional hierarchical structure has been flattof the base station controller (BSC) date for UMB Converged Access Netwopublication is December 2007. Figure 12CAN.

2. Network Nodes in CAN

DOBTS

DOBSC

AAA

PDSN

eBS

SRNC

HA Internet

PCRFgndi

Si alingMe a/Signaling

IMSAGW

DOBTS

DOBSC PDSN

AAA

eBS

SRNC

HA Internet

PCRFgndi

Si alingMe a/Signaling

AGWIMS

01/2008 page 18



B Evolved Base Station (eBS) functions are

similar to the combination of BTS and BSC functions in EV-DO

a ciphering. It is also the accounting client which assembles and forwards airlink records.

)

d

P-based access authentication. The SRNC can be implemented both in a centralized or a distributed fashion. In the centralized case, there

AGW; whereas s a

f

also acts as the Foreign Agent if applicable. It is the QoS enforcement and intrusion detection/prevention access point,

eBS The UM

architecture. Namely, in addition to the typical radio link functionality (PHY, MAC, RLP, etc), the eBS is also responsible for IP packet classification for over-the-air QoS, header compression (RoHC), and user dat

SRNC The Session Reference Network Controller (SRNCperforms the signaling functions for the UMB RAN. It stores references to ongoing sessions, as well as managing paging anlocation information. It is also responsible for idle state management, and is the authenticator for EA

is a single SRNC connected to several eBSs andin the distributed case, all eBSs act as SRNCs. A terminal hasingle SRNC associated with it at a given time.

AGW The Access Gateway functionalities are similar to that oPDSN in EV-DO networks. AGW tunnels IP packets for user data to the eBS, behaves as the AAA client for accounting, and

among other functions it performs.

CAN incorporates efficient tunneling mechanisms for full mobility support enabling fast seamless handoffs. Additional tunneling designs being standardized in 3GPP2 will also support seamless handoffs between UMB and EV-DO and CDMA2000 1X. A single radio solution is being defined through a tune-away procedure for terminals to monitor signals on both radio interfaces, allowing minimal service interruptions during handoffs between UMB and EV-DO/1X. The target date for tunneling requirements for inter-technology handoff support is December 2007.

01/2008 page 19



[3] Conclusions Designe ed today w best-eff ffs, tight interferemechani MB from other O e, operatoto d r a of devic

To efficiis desig devices enables can also th VoIP anincreasenetworkthe cent tions with faster, mor aprovide

d from day one to support mobile broadband, UMB is equippith all the necessary features for optimal support of real-time andort traffic with seamless mobility. Very low latency handonce management techniques, and efficient signaling sms are some of the design features that differentiate U

FDMA based systems. Based on UMBs competitive advantagrs will enjoy the lead in mobile broadband market with the ability

iffe entiate themselves through multimedia offerings with a plethore platforms.

ently meet the increasing demands for mobile broadband, UMB ned to complement 3G deployments. Use of multi-modeseamless mobility between UMB and existing networks. UMB be deployed by a greenfield operator to efficiently offer bod mobile broadband access. UMB delivers higher capacity, d user data rates and lower latencies along with an IP-based

architecture for flexible deployments. UMB is well suited to be at er of such a future that melds broadband applica

e c pable mobile multimedia devices. UMBs competitive advantages operators with continuous differentiation today and tomorrow.

2007Qualcomm Incorporated. All rights reserved. Qualcomm, Snapdragon is a trademark of Qualcomm Incorporated. All other trademarks are property of their respective owners. Qualcomm asserts that all information is correct through September 2008.

01/2008 page 20

[1] UMB: Competitive Advantages 1.1 Fast Time to Market 1.2 Unsurpassed Mobile Broadband Performance 1.3 Flexible Deployment Options 1.4 Inherently Designed for Real-time Services 1.5 Flexible IP-based Network Architecture [2] Key UMB Design Features 2.1 OFDMA 2.2 Advanced Antenna Techniques 2.3 RL Sector Capacity Optimizations 2.4 Adaptive Interference Management Mechanisms 2.5 Efficient RL Control Design 2.6 Low-Overhead Signaling 2.7 Fast Seamless Handoffs 2.8 Multi-carrier Support and Beacons 2.9 Enhanced Terminal Battery Life 2.10 Flexible IP-based Network Architecture

[3] Conclusions

Documents

UMB TechnologyOverview