1 Title: 1xEV-DO Forward Link Enhancement Proposal Source: Naga Bhushan, QUALCOMM Incorporated , Date: April 14, 2003 Recommendation: Review and adopt Notice QUALCOMM Incorporated grants a free, irrevocable license to 3GPP2 and its Organization Partners to incorporate text or other copyrightable material contained in the contribution and any modifications thereof in the creation of 3GPP2 publications; to copyright and sell in Organizational Partner’s name any Organizational Partner’s standards publication even though it may include portions of the contribution; and at the Organization Partner’s sole discretion to permit others to reproduce in whole or in part such contributions or the resulting Organizational Partner’s standards publication. QUALCOMM Incorporated is also willing to grant licenses under such contributor copyrights to third parties on reasonable, non-discriminatory terms and conditions for purpose of practicing an Organizational Partner’s standard which incorporates this contribution. This document has been prepared by QUALCOMM Incorporated to assist the development of specifications by 3GPP2. It is proposed to the Committee as a basis for discussion and is not to be construed as a binding proposal on QUALCOMM Incorporated. QUALCOMM Incorporated specifically reserves the right to amend or modify the material contained herein and nothing herein shall be construed as conferring or offering licenses or rights with respect to any intellectual property of QUALCOMM Incorporated other than provided in the copyright statement above. C xxxCoeur d’Alene, ID

2 New Physical Layer Packets Pkt Size (bits) Nominal Duration (slots) Nominal Data Rate (kbps) Code RateModulation /5QPSK /5QPSK /5QPSK /1216-QAM /616-QAM Two new DRCs : 13 (1.536 Mbps) and 14 (3.072 Mbps) Shorter Packets : Used with pre-existing, low DRC values (overloaded DRC interpretation)

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5 Interpretation of DRC Values DRCPream. Length (chips) Candidate Packet Types(Parameters) [ PktSize (bits), Tx Duration (slots), Rate (kbps)] 01024[ 128, 6, 12.8 ] or [ 256, 6, 25.6 ] or [ 512, 12, 25.6 ] or [ 1024, 16, 38.4 ] 11024[ 128, 6, 12.8 ] or [ 256, 6, 25.6 ] or [ 512, 12, 25.6 ] or [ 1024, 16, 38.4 ] 2512[ 128, 6, 12.8 ] or [ 256, 6, 25.6 ] or [ 512, 6, 51.2 ] or [ 1024, 8, 76.8 ] 3256[ 128, 4, 19.2 ] or [ 256, 4, 38.4 ] or [ 512, 4, 76.8 ] or [ 1024, 4, ] 4128[ 256, 2, 76.8 ] or [ 512, 2, ] or [ 1024, 2, ] 5128[ 512, 4, 76.8 ] or [ 2048, 4, ]

6 Interpretation of DRC Values DRCPream. Length (chips) Candidate Packet Types(Parameters) [ PktSize (bits), Tx Duration (slots), Rate (kbps)] 664[1024, 1, ] 764[2048, 2, ] 864[3072, 2, ] 964[2048, 1, ] 1064[4096, 2, ] 1164[3072, 1, ] 1264[4096, 1, ] 1364[5120, 2, 1536 ] 1464[5120, 1, 3072 ]

7 FL MAC Channels & Preambles 7-bit MAC Index Supports over 100 MAC Channels per sector FL MAC Channels (RPC, DRCLock etc.) covered by 128-ary Walsh Functions FL Packet Preambles employ bi-orthogonal modulation with 64-ary Walsh functions Backward compatibility ensured by assigning MAC Index < 64 to legacy terminals Further details on MAC channels found in RL physical layer enhancement contribution

8 Packet Division Multiplexing Multi-user Packets A single physical layer packet composed of one or more security layer packets, addressed to different users Five multi-user data rates Packet Preambles with MAC Indices 6-10 used to indicate the transmission of a multi-user packet, as well as its data rate (analogous to the 38.4k and 76.8k control channels) Multi-user packets ACK’d by users who receive ‘useful’ data (ie, SL packets addressed to them) from the physical layer packet MAC Index Multi-user Pkt Data Rate Preamble Length bits, 153.6k, 4 slots256 chips bits, 307.2k, 4 slots128 chips bits, 921.6k, 2 slots128 chips bits, 1.2M, 2 slots64 chips bits, 1.5M, 2 slots64 chips

9 Interpretation of MAC Indices MAC Index MAC Channel Use Preamble Use Preamble Length (chips) 0 and 1Not Used N/A 2Not Used76.8k CC512 3Not Used38.4k CC1024 4RA channelNot UsedN/A 5Not usedBroadcastVariable 6Not Used153.6k256 7Not Used307.2k-L128 8Not Used921.6k128 9Not Used1.2M-L64 10Not Used1.5M-L User-specific RPC and DRCLock Channels Single-user PacketDRC dependent

10 Multi-user packets (cont’d) User terminal tries to decode a multi-user packet if its DRC is “compatible” with the data rate of the multi-user packet (MUDR) Compatibility between Multi-user Data rate (MUDR) and DRC Compatible MDR has smaller (or equal) payload size, and longer (or equal) transmit duration as compared to the DRC DRC 0, 1, 2 : None DRC 3, 4, 6 : k DRC 5, 7, 9 : k, k-L DRC 8, 11 : k, k-L, 921 k DRC 10, 12 : k, k-L, 921 k, 1.2 M-L DRC 13, 14 : k, k-L, 921 k, 1.2 M-L, 1.5 M

11 DRC and Preamble detection DRCPreamble Detection MAC Indices 0, 1, 2 User-specific MAC index (single-user packets), 2, 3 (Control Channels) 3,4,6 User-specific MAC Index, 2, 3 and 5 5,7,9 User-specific Index, 2, 3, 5, 6 8, 11 User-specific Index, 2, 3, 5, 6, 7 10, 12 User-specific Index, 2, 3, 5, 6, 7, 8 13, 14 User-specific Index, 2, 3, 5, 6, 7, 8, 9

12 Packet Encapsulation & Layering

13 Packet Transmit Processing 24-bit CRC : D^24 + D^23 + D^6 + D^5 + D + 1 Channel Interleaver Generalization of current Fwd Link channel interleaver Details in Channel Interleaver contribution (Appendix) Scrambler Initial State: d 3 d 2 d 1 d 0 : 4-bit DRC associated with the packet For a multi-user packet, it is the unique DRC with the same block length as the given packet m 6 m 5 m 4 m 3 m 2 m 1 m 0 : 7-bit MAC Index associated with the packet For a multi-user packet, this is the MAC index used in the packet preamble b 1 b 0 : 00 for a 128 bit packet, 01 for a 256 bit packet, 10 for a 512 bit packet, 11 for all other packets

14 Construction of MAC Layer Packets

15 Packet Construction Rules Security Layer Packet contains one Connection Layer Packet, with no padding (Format A) Max length of 255 bytes (2040 bits), or no padding/multiplexing at the MAC Layer Simplex MAC Layer Packet Contains a single security layer packet (for one user) Empty MAC Header Single-user, Multiplex MAC Layer Packet One SL packet with padding Multiple SL packets for the same user, with or without padding If length fields of all SL packets do not account for the entire physical layer packet size, the last length field is an all-zero byte. Multi-user MAC Layer Packet Contains between 1 and 8 non-trivial Address Fields (up to 16 SL pkts) Address field with a leading 1 addresses two SL packets If number of non-trivial Address fields < 8, then the last Address field is an all-zero byte.

16 Scope of the Contribution Slides 2, 3, 4, 7, 8, 9, 12, 13 IS-856 Chapter 9 (Physical Layer) Slides 5, 6, 8, 9, 10, 11, 12, 14, 15 IS-856 Chapter 8, FTC MAC Protocol