Femtocell Over-The-Air Signaling Supported by Relay Link Document Number: IEEE C802.16m-09/0809 Date Submitted: 2009/04/24 Source: Hung-Yu Wei, Shih-Lung.

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Femtocell Over-The-Air Signaling Supported by Relay Link Document Number: IEEE C802.16m-09/0809 Date Submitted: 2009/04/24 Source: Hung-Yu Wei, Shih-Lung Chao, I-Kang Fu, Yih-Shen Chen NTU/MediaTek Venue: IEEE Session#61 at Cairo, Egypt. Base Contributions: This is base contribution Re: IEEE m-09/0021, “Call for Comments on Project m System Description Document (SDD)” - CR to SDD: Chapter 15 Support of Femtocell Purpose: For TGm members’ discussion and approval 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.

Motivation for Over-The-Air Signaling 2 Signaling through backhaul wired links: longer delay (20~200ms) Signaling through over-the-air radio links: low delay latency (5~15ms) Over-The-Air signaling between femtocell and macrocell will be very useful for the operations which need close coordination between femtocell BS and macrocell BS

Over-The-Air Signaling Supported by Relay Link Utilize Relay Link to establish to air interface connection between the femtocell BS and macrocell BS

Example on Over-The-Air Signaling over Relay Link Femtocell which equip with Relay Access module can setup Relay Link connection with the BS of overlapped macrocell Femtocell BSs behave as a Relay Station when communicating with macrocell BS or other femtocell BS This can be done by reusing the Relay Link designs with special protocol only for femtocell

Text Proposal [Add the following text into P802.16m SDD] 15.1 Types of Base stations A Femtocell BS is a BS with low transmit power, typically installed by a subscriber in home or SOHO to provide the access to closed or open group of users as configured by the subscriber and/or the access provider. A Femtocell BS is connected to the service provider’s network via broadband (such as DSL, or cable). For the femtocell BSs which can support Relay Link transmission, it may establish the air interface connection with the overlapped macrocell BS for exchanging control messages.