IEEE 802.16m Femto Proposal Document Number: IEEE S802.16m-08/1260 Date Submitted: 2008-10-31 Source: Baowei Ji, Bill Semper, Daegyun Kim,

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IEEE m Femto Proposal Document Number: IEEE S802.16m-08/1260 Date Submitted: Source: Baowei Ji, Bill Semper, Daegyun Kim, Sudhir Ramakrishna, Kaushik Josiam, Ying Li, Zhouyue Pi Phone: Samsung Telecommunications America Jaehee Cho, Youngbo Cho, ChangYoon Oh, ByungWook Jun, SeongHyeon Chae, Hyunjeong Kang, Rakesh Taori, Anshuman Nigam Samsung Electronics Venue:IEEE Session #58, Dallas, TX. Base Contributions: Re:TGm SDD: Femtocells Purpose: 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.

2 Outline Femto Cell-ID Selection Femto Access Control Femto Cell Selection Femto Mobility Management –Femto-to-Macro HO –Macro-to-Femto HO –Femto-to-Femto HO Femto Operation Modes Femto Inter Working Signal Hotzone

Femto Cell-ID Selection: Collision Avoidance 3

Femto Cell-ID Selection: Collision Resolution 4

Femto Access Control Closed User Group (CUG) Distributed CUG Femto cells 5

Femto Cell Selection Consideration –Mobility –The combination of Cell-ID and location –Access privilege 6

Femto-to-Macro HO 7

Macro-to-Femto HO 8

Femto-to-Femto HO Similar to macro-to-macro HO Alternatively, broadcast MOB_NBR-ADV on demand 9

Femto Operation Modes (1/2) Normal Operation Low-duty Operation 10

Femto Operation Modes (2/2) 11

Inter Working Signal (IWS) Transmission Assumption: Femto BS is synchronized to macro BS Femto BS transmits IWS at macro BS FA (frequency assignment) in long period An MS can detect the existence of Femto BS without scanning other FA Femto BSs using the same FA transmit IWS in the same time/frequency region –Femto BSs operating in different FA  the resource region for IWS transmission is different 12

Hotzone Operation Model Hotzone is a Femtocell BS open to all 16m subscribers Hotzone Operation Model –Hotzones are deployed to increase cell capacity Some of them may be deployed outside –Hotzones in macro coverage may operate in the same FA of macro BS It may cause interference 13

Problem Definition & Requirements Problem definition –Hotzone coverage may create a coverage hole in the macro cell Though Handover may appear to be an acceptable solution, it is not an effective solution to the above problem because HO may not always guarantee the connection, considering –Small size of hot zone –Configuration of deployed hot zone –High speed mobile –How to keep connection for a MS which can’t perform HO to hot zone? Requirements to support hot zone –Hot zone deployment shall not prevent 16m system from guaranteeing connection to system 14

Example of reserved resource Downlink Uplink 15

Suggested Text Accept the suggested text in C802.16m- 08/