C C /18 12/04/2000 QUALCOMM Inc Use subject to restrictions on cover page TITLE: Presentation of QUALCOMM’s 1X-EV-DV Study SOURCE: Stein Lundby QUALCOMM Inc. (858) ABSTRACT: This contribution describes the results from QUALCOMM’s 1X-EV-DV study. RECOMMENDATION: For information. Notice ©2000 QUALCOMM Incorporated. The information contained in this contribution is provided for the sole purpose of promoting discussion within the TIA and is not binding on the contributor. The contributor reserves the right to add to, amend or withdraw the statements contained herein. The contributor grants a free, irrevocable license to the Telecommunications Industry Association (TIA) to incorporate text contained in this contribution and any modifications thereof in the creation of a TIA standards publication; to copyright in TIA's name any TIA standards publication even though it may include portions of this contribution; and at TIA's sole discretion to permit others to reproduce in whole or in part the resulting TIA standards publications. The contributor may hold one or more patents or copyrights that cover information contained in this contribution. A license will be made available to applicants under reasonable terms and conditions that are demonstrably free of any unfair discrimination. Nothing contained herein shall be construed as conferring by implication, estoppel, or otherwise any license or right under any patent, whether or not the use of information herein necessarily employs an invention of any existing or later issued patent, or copyright. The contributor reserves the right to use all material submitted in this contribution for their own purposes, including republication and distribution to others.

C C /18 12/04/2000 QUALCOMM Inc Use subject to restrictions on cover page Outline Introduction Overview of Proposal Dynamic Resource Allocation Forward Link Structure DRC Feedback Scheduling of PSCH Reverse Link Structure

C C /18 12/04/2000 QUALCOMM Inc Use subject to restrictions on cover page Introduction (1) QUALCOMM supports the goal of enhancing packet data transmission capability in a cdma2000 system with integrated voice and data services –The existing cdma2000 standard supports integrated voice and data services with data rates up to kbps for 1x –1xEV-DV systems need to be significantly better than existing cdma2000 systems (with voice and data users) to make the additional development and fielding costs worthwhile

C C /18 12/04/2000 QUALCOMM Inc Use subject to restrictions on cover page Introduction (2) Our study has targeted the TSG-S Stage 1 requirements for 1xEV-DV –However, some of the requirements seem difficult to meet with existing technology »Doubling voice capacity »Required packet data rate and throughput in some environments –None of the 1xEV-DV proposals presented so far meet all of these fundamental requirements

C C /18 12/04/2000 QUALCOMM Inc Use subject to restrictions on cover page Introduction (3) This presentation contains results of our study Concepts reused from the 1xEV-DO standard: –Fast feedback of forward link condition and fast sector selection  allows for optimal resource allocation –Multi-user diversity –Adaptive coding and modulation –Incremental redundancy –Explicit rate indication on reverse link The critical issue is how to apply these concepts efficiently when voice users are present

C C /18 12/04/2000 QUALCOMM Inc Use subject to restrictions on cover page Introduction (4) The performance of this proposal is as good as or better than any proposals presented so far There is still room for significant improvements –New ideas to be studied –Lessons to be learned from cdma2000 1x deployment –Lessons to be learned from 1xEV-DO development and deployment It would be beneficial if all companies will study 1xEV-DV more thoroughly –It is impractical to try to define a good 1xEV-DV standard in six months

C C /18 12/04/2000 QUALCOMM Inc Use subject to restrictions on cover page Overview of Proposal Enhancements to cdma2000: Enhanced scheduling of left-over resources –Dynamic allocation of code space and BTS PA power unused by low-delay constraint services (FCH, SCH, DDCH) or overhead channels (FCCCH, PCH, …) Higher peak data rates on RL and FL Incremental redundancy Explicit rate indication on RL

C C /18 12/04/2000 QUALCOMM Inc Use subject to restrictions on cover page Dynamic Resource Allocation Pool as much as possible of unused power and Walsh codes in to the Pooled Supplemental Channel (PSCH): TX I or Time I or max. Walsh Space Time Used by dedicated and common CHs Leftovers pooled into PSCH

C C /18 12/04/2000 QUALCOMM Inc Use subject to restrictions on cover page Forward Link Structure (1) Channel format of PSCH similar to DO: –Up to 14 parallel sub-channels, each with a different Walsh code of length 16 chips –1 physical layer packet encoded and de-multiplexed over the sub-channels DEMUX I/Q Pairs 1 to N Encoded, Interleaved, Modulated data I Q I Q I Q I Q … 16 Chip Walsh Sub- Channel Cover 1 16 Chip Walsh Sub- Channel Cover 2 16 Chip Walsh Sub- Channel Cover N I Q I Q I Q … Summer I Q I QOther channels

C C /18 12/04/2000 QUALCOMM Inc Use subject to restrictions on cover page User C SubPkt P User A SubPkt P User B SubPkt P User A SubPkt P Forward Link Structure (2) Frame format of PSCH: –Variable length encoding »Minimum = 1.25 ms = 1 slot »Lower rates get longer sub-packets –Data rate specified by preamble Time P= Preamble Slot duration = 1.25 ms

C C /18 12/04/2000 QUALCOMM Inc Use subject to restrictions on cover page Incremental Redundancy (ARQ) Encoded packet sliced into several sub-packets: Each sub-packet sent over 1 or more slots R=1/5 encoded, interleaved symbols Copy of R=1/5 encoded, int. symbols 1 st TXP2 nd TXP3 rd TXP4 th TXP Minimum 1.25 ms

C C /18 12/04/2000 QUALCOMM Inc Use subject to restrictions on cover page DRC Feedback Feedback Normalized DRC (NDRC) at 800 Hz: –NDRC is DRC computed assuming that the PSCH will be offered the same power as the pilot channel –MS sends NDRC, but BTS selects rate »Lowers delay from rate determination to transmission »MS is told rate in preamble

C C /18 12/04/2000 QUALCOMM Inc Use subject to restrictions on cover page Forward Link Operation (1) BTS Timeline of events MS NDRC PSCH: P+Data ACK/NACK Broadcast PSCH space info (0) (1) (2,3,4,5) (6,7)

C C /18 12/04/2000 QUALCOMM Inc Use subject to restrictions on cover page Forward Link Operation (2) Timeline of events: 0) BTS a periodically broadcasts PSCH Walsh space 1) MS sends back NDRC 2) BTS (or BSC) selects MS to transmit on PSCH 3) BTS scales NDRC according to leftover I or 4) Data encoded and modulated according to scaled NDRC and PSCH space 5) Preamble + data transmitted on PSCH 6) MS detects packet and determines rate 7) MS decodes and sends fast ACK or NACK on RL

C C /18 12/04/2000 QUALCOMM Inc Use subject to restrictions on cover page Forward Link Operation (3) MS can operate without dedicated channels –CPCCH carries 800 Hz RL PC bits if FCH and DCCH are absent PSCH uses cell site selection –Site re-selection occurs at lower rate than slot by slot –Significantly reduces network load

C C /18 12/04/2000 QUALCOMM Inc Use subject to restrictions on cover page Reverse Link Structure (1) NDRC feedback channel 800 Hz ACK / NACK channel 800 Hz Additional higher rates –Up to ~1 Mbit/s Explicit Rate Indication

C C /18 12/04/2000 QUALCOMM Inc Use subject to restrictions on cover page Reverse Link Structure (2)

C C /18 12/04/2000 QUALCOMM Inc Use subject to restrictions on cover page Reverse Link Structure (3)