1. HRPD Connectionless MAC ZTE grants a free, irrevocable license to 3GPP2 and its Organizational 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 all or portions of this contribution; and at the Organizational Partner's sole discretion to permit others to reproduce in whole or in part such contribution or the resulting Organizational Partner's standards publication. ZTE 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 ZTE 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 contributors. ZTE specifically reserves the right to amend or modify the material contained herein and to any intellectual property of contributors other than provided in the copyright statement above. Yonggang Fang, Ting Lu, YuanFang Yu, Xiaowu Zhao yfang@zteusa.comyfang@zteusa.com, lu.ting, yu.yuanfang, zhao.xiaowu@zte.com.cn

2. © 2006, ZTE Corporation. All rights reserved. 2 In C21-20090921-010, it proposes RL Connectionless Transmission o PNRandomization is split into Signaling and DoS sections o Signaling chip offsets are same as current, 0, 8, 16, …, N*8 o DoS chip offsets are DS*8, DS*8+8, DS*8+16, …, DS*8+M*8 o AT shall send true signaling packets on the signaling section, and o DoS packets on the DoS section FL Connectionless Transmission o Configurable attribute OffsetSubsyn, setting CC subsyn interlace offset used by an AT o OffsetSubsyn value is set relative to the synchronous capsule, as o [T+256xR] mod max(Period,256) = Offset o [T+256xR] mod Period = (Offset + Offsubsyn) mod 4, if Period < 256 o In this way, CCsubsyn transmissions are unaffected by delays in CCsyn transmissions Background

3. © 2006, ZTE Corporation. All rights reserved. 3 Prioritizing Common Signaling vs DoS (RL) o On BTS side, PHY would be able to distinguish if the packet is signaling or DoS through PN delays. However, if PHY delivers the packet to single AC MAC, the MAC could not be able to prioritize the packet unless it deciphers the packet. o Deciphering application payload at MAC layer is time-consuming and takes a lot of BTS micro processor’s processing power. o On AT side, when AT upper layer sends a packet to DoS in application layer, DoS adds its headers and sends to SNP. DoS packet is mixed with other HRPD signaling after reaching AC MAC. This would cause the AC MAC difficult to distinguish the packet types and separate the DoS packets from signaling unless deciphering the payload. Therefore AC MAC could not be able to apply different PN delay to different type of packets. Concerns

4. © 2006, ZTE Corporation. All rights reserved. 4 Prioritizing Common Signaling vs DoS (FL) o When BSC packs an application layer packet, such as PPP payload, into the application layer, the packet is treated as DoS for AT in the idle (dormant) state. This packet is sent to the connection layer and reaches CC MAC in BTS. o When BTS schedules Control Channel capsules, it does not distinguish if it is a pure HRPD signaling or DoS packet. Therefore it could not be able to prioritize the signaling packet unless it deciphers the packet. Concerns

5. © 2006, ZTE Corporation. All rights reserved. 5 DoS Needs Extra Segmentation in SLP o When DoS receives a packet from application, it sends it to SLP as signaling. SLP segmentation is required at the sender and de- segmentation is at receiver side. o The SLP segmentation requires to add SLP header when passing to the lower layers, which adds some unnecessary deficiency. o In addition, SLP segmentation and de-segmentation requires extra processing and may cause some delay. Concerns

6. © 2006, ZTE Corporation. All rights reserved. 6 DoS-RLP Sequence Synchronization and Data Transfer o DoS and RLP use different re-transmission mechanism. They may keep two different data buffers: one for DoS (Idle or connectionless), and one for RLP (Connected or Connected Lite). o When AT/AN switches from the connectionless mode to the Connected Mode, or ConnectionLite Mode, o The data in DoS buffer might be required to copy to RLP buffer. o DoS sequence number needs to be synchronized with RLP sequence. o If the short data packet would be separated from Common signaling and sent to data section of MAC, DoS protocol would not be necessary. The short data packet in-sequence delivery would only rely on RLP, which is be same as regular traffic transmission. o Therefore, all the upper layer packets would go through the same path whenever in the connectionless state or connectionlite or connected state. No DoS and RLP sequence synchronization is needed. This will simplify the design. Concerns

7. © 2006, ZTE Corporation. All rights reserved. 7 Connectionless MAC o Define a RL and FL Connectionless MAC to separate Common Signaling from short packet data so that HRPD signaling would be able to be prioritized. Proposal

8. © 2006, ZTE Corporation. All rights reserved. 8 RL Connectionless Channel Data Path RL Connectionless MAC Channel Connectionless MAC Access Channel MAC PCP Stream SNP Stream RLP PHY Connectionless MAC Access Channel MAC PCP SLP SNP Stream RLP PHY PPP Octets ATAN Stream SLP

9. © 2006, ZTE Corporation. All rights reserved. 9 FL Connectionless Channel Data Path FL Connectionless MAC Channel Connectionless MAC Control Channel MAC PCP Stream SNP Stream RLP PHY Connectionless MAC Control Channel MAC PCP SLP SNP Stream RLP PHY PPP Octets ATAN Stream SLP

10. © 2006, ZTE Corporation. All rights reserved. 10 AT side The pure HRPD signal will go from SNP though AC MAC and using Signaling PN delay chip offsets for PHY The short data packet (DoS) will go from upper layer (such as PPP) though Connectionless MAC and using Connectionless PN delay chip offsets for PHY AN side When PHY receives packet with Singling Section PN delay, it will pass to Signaling MAC When PHY receives packet with Connectionless Section PN delay, it will send to Connectionless MAC The existing upper layer will handle this. RL Connectionless MAC Channel

11. © 2006, ZTE Corporation. All rights reserved. 11 AN side PPP layer sends its payload to RLP which adds RLP header for packet sequential delivery. RLP payload is sent to the Stream Layer and Connection Layer before reaching to Connectionless MAC layer. The FL Connectionless MAC handles the packet from PCP and adds MAC header. Then it sends the MAC Capsule to PHY in synchronized or asynchronized transmission. AT side If the PHY receives a packet, it will check the MAC type. For Connectionless MAC type, it forwards the MAC payload to Connectionless MAC. Otherwise, it will send to CC MAC. FL Connectionless MAC Channel

12. © 2006, ZTE Corporation. All rights reserved. 12 Connectionless MAC Header ConnectionlessFormat: Legacy AT/AN will set this field to 0. (backward compatible) Rev C AT/AN will set this field to 1. Reserved Field: The sender shall set this field to all zeros. The receiver shall ignore this field. Connectionless MAC Channel FieldLength (bits) Length8 … SecurityLayerFormat1 ConnectionLayerFormat1 ConnectionlessFormat1 Reserved3 ATI Record2 or 34

13. © 2006, ZTE Corporation. All rights reserved. 13 Thank You