Requirements projected by Operators’ sub group of Broadband Wireless Consortium of India (BWCI) and Impacts on Uplink Multiple Access Choice IEEE 802.16 Presentation Submission Template (Rev. 9) Document Number: IEEE C802.16m-08_254r1 Date Submitted: 2008-03-19 Source: Kiran Kuchi, J Klutto Milleth CEWiT E-mail: kkuchi@cewit.org.in, klutto@cewit.org.in India Venue: Orlando, USA The presentation accompanies a selected items from the base 802.16 contribution, IEEE C802.16m-07_178 Purpose: To facilitate the choice of uplink multiple access during the IEEE 802.16 meeting in Orlando, USA Notice: This document does not represent the agreed views of the IEEE 802.16 Working Group or any of its subgroups. It represents only the views of the participants listed in the “Source(s)” field above. It is offered as a basis for discussion. It is not binding on the contributor(s), who reserve(s) the right to add, amend or withdraw material contained herein. Release: The contributor grants a free, irrevocable license to the IEEE to incorporate material contained in this contribution, and any modifications thereof, in the creation of an IEEE Standards publication; to copyright in the IEEE’s name any IEEE Standards publication even though it may include portions of this contribution; and at the IEEE’s sole discretion to permit others to reproduce in whole or in part the resulting IEEE Standards publication. The contributor also acknowledges and accepts that this contribution may be made public by IEEE 802.16. Patent Policy: The contributor is familiar with the IEEE-SA Patent Policy and Procedures: <http://standards.ieee.org/guides/bylaws/sect6-7.html#6> and <http://standards.ieee.org/guides/opman/sect6.html#6.3>. Further information is located at <http://standards.ieee.org/board/pat/pat-material.html> and <http://standards.ieee.org/board/pat >.

Requirements projected by Operators’ sub group of Broadband Wireless Consortium of India (BWCI) and Impacts to Uplink Multiple Access Presented by Kiran Kuchi CEWiT

Indian Scenario Based on the unified views expressed by the various operators of India Broadband Wireless Consortium of India (BWCI) a strategic initiative of Centre of Excellence in Wireless Technology (CEWiT), India Requirements arrived based on the operators’ previous experience in providing cellular telephone services in India. The operators in India are expected to serve about of 900 subscribers/cell that covers different market segments the cell radius varying between 100m and 20 Km At least 85% of the subscribers will be nomadic and indoors Basic service must support voice which is very much essential BWA at the right price point can lead to explosive growth Requires the number of base stations to be kept to minimum to cover certain geographical area

Market Segmentation and user density Dense Urban (Case: Mumbai) 70% of 16Million people In area of 600 sq Km ~3733 households per sq km Assuming 5 per household ~ 50% wireless internet subscribers ~ 1866 wireless internet/sq km cell radius = 0.75 km ~ 3300 subscribers/cell Assuming 5 competitive operators in each area => 660 subscribers/operator/cell Rural 600000 villages cell radius ~ 15 km => 150 villages 700 MHz band could be considered for larger cells each village has ~ 5 households who would take internet and ~5 public access/kiosks ~ 1500 subscribers/cell 2 or 3 operators ~500-750 subscribers/operator/cell

For TGm consideration IEEE 802.16m should support larger cell sizes with radius as high as 20 Km, or even more, and should be able to provide both voice and data in low SNR conditions Gain obtained through low PAPR especially important for rural case for enhancing the cell coverage. Also, in dense urban cells the gain will compensate for the wall penetration loss to a certain extent We propose separate zones for OFDMA (mandatory) and SC-FDMA (optional) for uplink multiple access The operator should be able to judiciously use both the schemes depending on the deployment scenario We strongly believe that IEEE 802.16m may be at the risk of not meeting the above requirements in the absence of SC-FDMA option and may lose out to other competing standards, at least in the Indian context