Cognition zone to support coexistence among IEEE 802.16m and other RATs Document Number: IEEE S80216m-08/1132 Date Submitted: 2008-09-15 Source: Feng YANG,

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Cognition zone to support coexistence among IEEE m and other RATs Document Number: IEEE S80216m-08/1132 Date Submitted: Source: Feng YANG, Jigang QIU, Binyang XU, Hongwei YANG Voice: Ext Alcatel Shanghai Bell Co., Ltd * Venue: IEEE session #57, Kobe Base Contribution: IEEE C80216m-08/1132 Purpose: For discussion on the on the topic of Multi-Radio Coexistence. Notice: This document does not represent the agreed views of the IEEE 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 Patent Policy: The contributor is familiar with the IEEE-SA Patent Policy and Procedures: and. Further information is located at and. S802.16m-08/1132

Introduction According to SRD, m shall be deployed in the same or overlapping geographic areas with other wireless networks based on different RATs. Different coexistence requirements: –IEEE m and non m systems may be deployed in the same licensed band. Adjacent channels may be used for deployment of m and non m systems. –IEEE m may be deployed in a licensed band adjacent to an unlicensed band in which non m systems are deployed. Hence additional coexistence mechanisms may be required to reduce interference. –IEEE m may be required to share bands: on a co-channel basis with other m systems on a co-channel basis with non m systems, where m is either a primary or non-primary systems on a non co-channel basis with non m systems, where m is either a primary or non-primary systems

Cognition Zone(1/2) We propose to add a cognition zone is 16m frame structure to facilitate the coexistence. In cognition zone, a special designed coexistence beacon is thrown. The beacon shall –be easily detected and decoded by other coexisting systems –be generic, which makes it possible to be implemented by different systems –contain coexistence information to facilitate efficient synchronization, cooperation, optimization, etc.

Cognition Zone(2/2) Working mechanism of coexistence beacon –Initialization phase of m BS A shall monitor the channel to capture the beacon thrown by other secondary SSs. If no beacon is captured, BS A can operate in this channel. If a beacon is received, it indicates that other secondary systems are occupying the channel. Then BS A shall avoid using this channel. –Operating phase of m BS A and SS A shall synchronize with other secondary systems and monitor the channel availability periodically. If SS A receives the beacon from other secondary SS B, it conveys the received beacon to its associated BS A. BS A will also scan for beacons. Based on the beacon info, BS A can take different coexistence strategies, such as avoiding using the same channel as other secondary systems or throwing beacons in its own cognition zone to negotiate with the coexisting secondary systems to share the channel peacefully. Beacon illustration, where SS A associated with m BS A, SS B associated with other secondary BS B, BS A and BS B coexist with a primary BS.

Benefits of cognition zone Cognition zone facilitates many coexistence scenarios: –802.16m as a primary system Beacons, thrown by a primary m system, help other secondary systems to detect the presence of primary m systems. It reduces the difficulty of sensing for secondary systems and improve the sensing reliability. Then, it better protects m system. –16m as a secondary system Beacon IEs help other secondary systems to synchronization Beacon IEs enable efficient channel allocation, channel renting/offering, channel contention, etc. Cognition zone concept makes m meet IMT-advanced coexistence requirement and have more competitive advantage in future wireless markets.

Text Proposal [Insert the following into section 17 Solutions for Co- deployment and Co-existence] –To enable coexistence of IEEE m with other RATs, a cognition zone can be added in m frame structure. With the coexistence beacon thrown in the added cognition zone, the coexisting systems can synchronize/communicate/cooperate with each other efficiently. Then m can be efficiently co-deployed with other m network or other wireless networks with different RATs.