1. Distributed Nodes Cellular Systems for IEEE 802.16m Document Number: IEEE S802.16m-07_214, Date Submitted: 2007-11-13 Source: Yunzhou Li, Xibin Xu, Xin Su, Xiaofeng Zhong, Shidong Zhou E-mail:{liyunzhou, xuxb, suxin, zhongxf, zhousd}@tsinghua.edu.cn Tsinghua Univ. Re: TGm Call for comments on SDD, IEEE 802.16m-07/040 Abstract: This document proposes a new approach to randomize inter-cell interference based on cell/sector-specific interleaver pattern. Purpose: This contribution proposes a new approach to randomize inter-cell interference based on cell/sector-specific interleaver pattern. Meanwhile, some simulation results to verify the advantages of the new approach are presented in this contribution, too. 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: and.http://standards.ieee.org/guides/bylaws/sect6-7.html#6http://standards.ieee.org/guides/opman/sect6.html#6.3 Further information is located at and.http://standards.ieee.org/board/pat/pat-material.htmlhttp://standards.ieee.org/board/pat

2. March 21, 2007, Presentation to Verizon MOTOROLA and the Stylized M Logo are registered in the US Patent & Trademark Office. All other product or service names are the property of their respective owners. © Motorola, Inc. 2006. 2 Outline A big problem that 802.16m is going to face The introduction of DNCS Feasibility study for DNCS for 802.16m Conclusion and Text proposal to 802.16m SDD

3. March 21, 2007, Presentation to Verizon MOTOROLA and the Stylized M Logo are registered in the US Patent & Trademark Office. All other product or service names are the property of their respective owners. © Motorola, Inc. 2006. 3 A big problem that 802.16m is going to face The deployment of base station for 802.16m will be a big problem, the reasons:  The transmit power per sector may be up to 49dBm for 20MHz bandwidth and 56dBm for 100MHz bandwidth, which is so large that is becoming a threat against security of people.  In china, the deployment of base stations for TD-SCDMA has encountered the some problem for the address selection of BS when set up trial networks. The distributed nodes cellular systems (DNCS) is a effective solution to the problem of big transmit power.

4. March 21, 2007, Presentation to Verizon MOTOROLA and the Stylized M Logo are registered in the US Patent & Trademark Office. All other product or service names are the property of their respective owners. © Motorola, Inc. 2006. 4 The introduction of DNCS The DNCS consists of a central BS and several distributed nodes (Node A) The main purpose of using Node A is to boost the practical throughput and frequency efficiency of each cell in high user density areas The algorithms of cooperative transmitting between N.A. and BS and RRM can be designed in a similar way to using Relay Stations

5. March 21, 2007, Presentation to Verizon MOTOROLA and the Stylized M Logo are registered in the US Patent & Trademark Office. All other product or service names are the property of their respective owners. © Motorola, Inc. 2006. 5 Feasibility study for DNCS for 802.16m It is proved the feasibility of using relay station to extend the cellular system to improve the coverage area of one Base Station (BS), increase the capacity of one BS, and cover dead spots. In high user density areas (hot spots), fibers and other resource of infrastructure are usually much richer than used, so It is feasible to connect BS and its RSs via these wired lines in the areas. The techniques of Radio over Fiber (RoF) has been used for several years to improve the coverage of cellular system of 3G In a conclusion, it is practical and affordable to build DNCS in hot spots base on the development of RoF.

6. March 21, 2007, Presentation to Verizon MOTOROLA and the Stylized M Logo are registered in the US Patent & Trademark Office. All other product or service names are the property of their respective owners. © Motorola, Inc. 2006. 6 Conclusion and Text proposal to 802.16m SDD There are several abstractive features in DNCS:  The capability of DNCS in data capacity and user capacity can be smoothly extended by adding new Node A, so it is feasible to increase the capacity of the cellular system after the Base station has been set up.  Emitting power can be significantly reduced by using DNCS via reducing access distance between subscriber and access antennas. [ The following text proposal is suggested by this contribution: The system architecture of cellular system with distributed nodes (Node A) connecting with base station via dedicated wires, i.e. DNCS, should be considered in SDD. ]