Cdma2000 Release C (1xEV-DV) Status and Summary

Outline

• Cdma2000 1xEV-DV Release C Overview– Design compatibilities– Release C enhancements to cdma2000– Performance

• Status and Plans

• Potential Harmonization Topics

• Current 1xEV-DV design maintains backward compatibility with previous cdma2000 and IS-95 releases, i.e. existing channels are supported in 1xEV-DV

• Thus, a base station supporting an 1xEV-DV forward link can also support mobile stations conforming to

– TIA/EIA/IS-95-A

– TIA/EIA/IS-95-B

– cdma2000 Revision 0

– cdma2000 Revision A

– cdma2000 Revision B

Design Compatibilities of 1xEV-DV

Key Aspects of Current 1xEV-DV Forward Link Design

• Fully maintains existing cdma2000 channels and signaling structure

• Set of fixed packet sizes (408, 792, 1560, 2328, 3096, and 3864 bits)

• Variable packet durations (1.25, 2.5, and 5 ms)

• Channel sensitive scheduling

• C/I feedback rate of 800 Hz

• Scheduling time granularity of 1.25 ms

• Asynchronous retransmissions

• Adaptive modulation and coding with higher-level modulation schemes (QPSK, 8-PSK, and 16QAM)

• Variable duration code-division multiplexed common control channels (1.25, 2.5, and 5 ms)

• Synchronous acknowledgements

• Using existing cdma2000 turbo codes, Quasi-Complementary Turbo Code (QCTC) interleaving

• TDM/CDM capability included

New Forward Link Channels

• Forward Packet Data Channel (F-PDCH)– Shared by packet data users– Consist of a number of code-division-multiplexed quadrature Walsh

subchannels, each spread by 32-ary Walsh function

• Forward Packet Data Control Channel (F-PDCCH)– Used to send the scheduled user’s MAC ID, ARQ Channel ID, Encoder

Packet Size, and Sub-packet ID for most of the time– Used to broadcast available Walsh space information when needed– Second, coupled F-PDCCH enables TDM/CDM

CDMA2000 Forward Link

PilotChannels

SyncChannel

PagingChannels

CommonControl

Channels

TrafficChannels

0-1

Channel

Power ControlSubchannel

0-7 SupplementalCode Channels

(RC 1-2)

0-2 SupplementalChannels(RC 3-10)

BroadcastControl

Channels

QuickPaging

Channels

CommonPower Control

Channels

CommonAssignment

Channels

ForwardPilot

Channel

TransmitDiversity

Pilot Channel

AuxiliaryPilot

Channels

Aux. TransmitDiversity

Pilot Channels

0-1 DedicatedControlChannel

Packet Data ControlChannels

0-1 Packet DataChannels (RadioConfiguration 10)

Fundamental

Releases 0, A, B, C for Spreading Rate 1 (SR1 aka 1X)

= Release C (1xEV-DV)

FORWARD CDMA CHANNELfor Spreading Rate 1

(SR1)

Reverse Link Channels that Support Forward Link Packet Data Operation

• Reverse ACK Channel (R-ACKCH)– ACK Channel to indicate to the base station whether a sub-packet

transmitted on the F-PDCH was received successfully or not

• Reverse Channel Quality Indicator Channel (R-CQICH)– Used by the mobile station to indicate to the base station the channel

quality measurements of the best serving sector

CDMA2000 Reverse LinkReleases 0, A, B, C for Spreading Rate 1 (SR1 aka 1X)

AccessChannel

ReverseTraffic

ChannelRC1 or 2

ReverseFundamental

Channel0 to 7 ReverseSupplemental

Code Channels

EnhancedAccessChannel

Operation

ReversePilot Channel

EnhancedAccess Channel

ReverseCommonChannel

Operation

ReversePilot Channel

Reverse CommonControl Channel

ReverseTraffic

ChannelOperation(RC3 to 6)

ReversePilot Channel

0 or 1 ReverseDedicated

Code Channels0 or 1 ReverseFundamental

Channel0 or 1 ReverseSupplemental

Channels0 or 1 ReversePower Control

Channel0-1 Reverse

AcknowledgementChannel

0-1 ReverseChannel Quality

Indicator Channel= Release C (1xEV-DV)

REVERSE CDMA CHANNELFor Spreading Rate 1 (SR1)

Cdma2000 Release C Basic Operation

(1) Rate Controlled Service (e.g. delay tolerant data)

(1) 1X-EV-DV common carrier BS

(2) Measure common continuous CDM pilot

(1) Power Controlled Service (e.g. voice, real-time data)

(5) At time k, BS allocates P-PPC’ =

PRC’[k] to Rate Controlled users

(5’) Data and C

ontrol In

formatio

n

(3’) Send back C

/I

to `b

est’ secto

r (3) Send back FL PC bits

Legend:PPC = Power for power controlled servicePRC = Power for rate controlled serviceVi = priority function for user i

(2’)

Broa

dcas

t Wal

sh S

pace

Upd

ate

as o

ften

as n

eede

d

(4) BS estimates PPC[k+1] and determines PRC[k+1]

(4’) BS determines a Vi[k+1] for all users i, and determines which rate controlled user will be transmitted

(6) S

end back

Ack/Nak

Cdma2000 Release C Performance Summary

• Maintains current cdma2000 coverage– Reuse existing cell sites

• 3.09 Mbps peak forward link data rate• Average system wide throughput ranges form 420 kbps to 1.7 Mbps

– Traffic models– Channel models

• 451.2 kbps peak reverse link data rate

Cdma2000 Status and Plans in 3GPP2

• Cdma2000 Release C (1xEV-DV) approved for SDO review May 28, 2002

• Submitted to ITU WP-8F and referenced to IMT2000• Currently revisiting evaluation methodology document• Drafting of Cdma2000 Release D development schedule• Technologies under consideration for next release :

– Cdma2000 Enhancements– Reverse and Forward Link

– Antenna Technologies– Broadcast/Multicast– Etc.

• 3GPP2 Vision/Evolution Workshop Scheduled July 2002– Expected focus (Core Network)– Y’all come attend!

Potential Harmonization Topics

• QoS– Parameters to pass around the network?– Studies to conduct?– Etc.