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Call-back HO Procedure for Reentry Femtocell IEEE 802.16 Presentation Submission Template (Rev. 9) Document Number: IEEE C802.16m-09/3099r2 Date Submitted:

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Presentation on theme: "Call-back HO Procedure for Reentry Femtocell IEEE 802.16 Presentation Submission Template (Rev. 9) Document Number: IEEE C802.16m-09/3099r2 Date Submitted:"— Presentation transcript:

1 Call-back HO Procedure for Reentry Femtocell IEEE 802.16 Presentation Submission Template (Rev. 9) Document Number: IEEE C802.16m-09/3099r2 Date Submitted: 2010-01-12 Source: Whai-En Chen, Shih-Yuan Cheng wechen@niu.edu.tw National Ilan University Shiann-Tsong Sheu, Chih-Cheng Yang stsheu@ce.ncu.edu.tw National Central University Kanchei(Ken) Loa, Yi-Ting Lin, Tsung-Yu Tsai, Youn-Tai Lee, Chun-Yen Hsu, Chiu-Wen Chen loa@iii.org.tw Institute for Information Industry Yang-Han Lee, Yih Guang Jan Tamkang University * http://standards.ieee.org/faqs/affiliationFAQ.html Venue: Base Contribution: N/A Re : Contribution in support of a comment on P802.16m/D3 currently under LB#30b Purpose: Discussion and approval of the proposal into the IEEE P802.16m/D3 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 802.1 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 Problem Statement Since the backhaul link of a Femto ABS may disconnect from network and reconnect to network sometimes, the proposed method for handling the associated AMSs to leave and return the recovered Femto ABS should be designed in order to –continue the services, and –optimize the network performance –Interference Mitigation. 2

3 Problem Statement In case the AMS can not find a near Femto or macro ABS to access, it should use a high power to Tx its data. It definitely will interfere the other Macro/Femto ABSs and/or AMSs [1]. 3

4 Handover Trigger The WiMAX Forum document “Requirements for WiMAX Femtocell Systems V1.0” states that –A Femto ABS SHALL disable its downlink air interface transmitter until the connection with the operator’s network is fully established. As the serving Femto ABS loses the backhaul connection, it shall command all the associated AMSs to perform handover procedure. –The handover request signal shall include the reason code, which is used to notify the AMSs to record the original Femto ABS information (e.g., Femto ABS ID) and wait for any callback signal. 4

5 Call-back handover procedure After the Femto ABS reconnects to the network, the Femto ABS notify the network HO controller to initiate the call-back handover procedure for generating the callback HO message with the original Femto ABS ID in order to call back those AMSs who have recorded the information of original Femto ABS. Upon receipt of the call-back handover signal from serving ABS, the AMS will try to handover to the recorded Femto ABS if the signal quality is better than the current connection. 5

6 Femto ABS initiates handover when the backhaul link is lost 6

7 Network-initiated Call-back handover procedure 7

8 Proposed Text [Add the following section 16.x.x “Call-back Handover Support”] 16.x.x Call-back Handover Support After the backhaul connectivity is recovered, the Femto ABS should inform the network controller to issue call-back handover signals with Femto ABS ID to the related ABSs for notifying those AMSs, which have stored the information of Femto ABS, to handover back. 8

9 Reference [1] GPP TR 25.820 V8.2.0: 3G Home NodeB Study Item Technical Report (Rel-8) 9

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