1. Title: Source: Contact: Date: Abstract: Recommendation: Notice © 2000, Panasonic. All rights reserved. The information contained in this contribution is provided for the sole purpose of promoting discussion within the 3GPP2 and its Organization Partners and is not binding on the contributor. The contributor reserves the right to add to, amend, or withdraw the statements contained herein. Panasonic 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. 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 his own purposes, including republication and distribution to others. Transmission power reduction scheme of AP Kenichi Miyoshi Panasonic TEL +81 468 40 5161 FAX +81 468 40 5183 E-mail Kenichi.Miyoshi@yrp.mci.mei.co.jp July 24, 2000 This contribution presents the simulation results of the transmission power reduction scheme of AP proposed by Panasonic at TSG-C WG3 in Hawaii. Discuss and Adopt.

2. Panasonic C30-20000724-XXX TSG-C 1XEV Physical Layer AdHoc Conference Call Jul./24/2000-2 Contents Explanation of proposed scheme Simulation results of –DRC selection at AP –AT’s retransmission –System throughput

3. Panasonic C30-20000724-XXX TSG-C 1XEV Physical Layer AdHoc Conference Call Jul./24/2000-3 Proposed power reduction scheme AT requests reduced power transmission for 2.4Mbps(16QAM) with DRC AP transmits 2.4Mbps(16QAM) data at reduced power X[dB],Y[dB] AP can reduce the transmission power AP can reduce interference to adjacent cells System throughput can increase Data 400 chips Data 400 chips Pilot 96 chips Data 400 chips MAC 64 chips MAC 64 chips Pilot 96 chips Data 400 chips 1024 chips = half slot Full power X or Y MAC 64 chips MAC 64 chips

4. Panasonic C30-20000724-XXX TSG-C 1XEV Physical Layer AdHoc Conference Call Jul./24/2000-4 DRC request X+2[dB] Y+2[dB] Packet Error RateReceived C/I of Pilot 2457.6 by Y[dB] power reduction 2457.6 by X[dB] power reduction 2457.61843.21228.8 2457.61843.21228.8 Set packet error rate AT requests X[dB] power reduction DRC when received C/I is better than 2+X[dB] AT requests Y[dB] power reduction DRC when received C/I is better than 2+Y[dB] AT’s DRC request

5. Panasonic C30-20000724-XXX TSG-C 1XEV Physical Layer AdHoc Conference Call Jul./24/2000-5 Simulation assumptions(1) Cellular TopologyHexagonal grid,7cells Sectorization3-sector Career frequency2G Hz Propagation modelETSI (UMTS 30.03 V3.2.0) Log-normal shadowing8.0dB Sector radius1000m AP TX1-antenna AT RX1-anntena ParameterValue Channel models 2-multipath rayleigh Power function=0.75:0.25 AT speed3km/h Traffic model Loaded queues There is always data Power reduction value for 2.4Mbps(16QAM) DRC X = 2[dB] Y = 4[dB]

6. Panasonic C30-20000724-XXX TSG-C 1XEV Physical Layer AdHoc Conference Call Jul./24/2000-6 Simulation assumptions(2) 7 cells with 3sectors(with wrapping) AT’s distribution Scenario1) Uniform in each sector Scenario2) All ATs are within 300m from AP AP

7. Panasonic C30-20000724-XXX TSG-C 1XEV Physical Layer AdHoc Conference Call Jul./24/2000-7 DRC selection at AP(scenario1)

8. Panasonic C30-20000724-XXX TSG-C 1XEV Physical Layer AdHoc Conference Call Jul./24/2000-8 AT’s retransmission(scenario1)

9. Panasonic C30-20000724-XXX TSG-C 1XEV Physical Layer AdHoc Conference Call Jul./24/2000-9 System throughput(scenario1)

10. Panasonic C30-20000724-XXX TSG-C 1XEV Physical Layer AdHoc Conference Call Jul./24/2000-10 DRC selection at AP(scenario2)

11. Panasonic C30-20000724-XXX TSG-C 1XEV Physical Layer AdHoc Conference Call Jul./24/2000-11 AT’s retransmission(scenario2)

12. Panasonic C30-20000724-XXX TSG-C 1XEV Physical Layer AdHoc Conference Call Jul./24/2000-12 System throughput(scenario2)

13. Panasonic C30-20000724-XXX TSG-C 1XEV Physical Layer AdHoc Conference Call Jul./24/2000-13 Considerations Scenario1(Uniform distribution) 2.4Mbps DRC is selected at 35% Reduced power DRC is selected at 7%(5%+2%) Retransmission probability can be reduced (12.288 Mbps DRC becomes from 38% to 32%) Scenario2(Near distribution from AP) 2.4Mbps DRC is selected at 80% Reduced power DRC is selected at 25%(15%+10%) Retransmission probability can be reduced

14. Panasonic C30-20000724-XXX TSG-C 1XEV Physical Layer AdHoc Conference Call Jul./24/2000-14 Demand for high speed rate data Demand for high speed rate data will increase HDR’s main target is high speed rate users –Home internet market –Mobile professional market Proposed scheme is very effective when ATs are near AP and high speed rate data are requested frequently

15. Panasonic C30-20000724-XXX TSG-C 1XEV Physical Layer AdHoc Conference Call Jul./24/2000-15 Summary Proposed AP’s transmission power reduction scheme –can reduce interference to adjacent cells –can reduce retransmission probability –can reduce AP’s power consumption