Handoff Procedure in the 802.16m Femto Cell Environments
IEEE 802.16 Presentation Submission Template (Rev. 9)
Document Number:
IEEE S802.16m-08/1408
Date Submitted:
2008-10-31
Source:
Sunggeun Jin, Sungcheol Chang,
Voice: +82-42-860-5456
Wonik Kim, Hyun Lee, Soojung Jung, Chulsik Yoon
E-mail: {scchang, kjlim, csyoon}@etri.re.kr
ETRI
161 Gajeong-dong Yusong-gu Daejeon, Korea
Venue:
RE: TGm SDD: Femto cells
Base Contribution:
IEEE S802.16m-08/1408
Purpose:
Include texture proposal in the next version of SDD document
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Handoff Procedure in the 802.16m Femto Cell
Environments
• Femto Cell Environments
– Large number of Femto BS in a single macro BS
– Long list of neighboring Femto BS
• Expected Problems
– the long list requires wasteful wireless resources
– it takes long time to scan all the neighboring femto BSs
 We provide a remedy for the problems.
Proposed Remedy
• Reduced List of Neighboring Femto BS
• Procedures
– (1) BS estimates the locations of Mobile Stations.
– (2) BS prepares and broadcasts neighboring femto BS messages
generated by the estimation.
– (3) BS can allow a group of MSs to scan neighboring femto BS
simultaneously.
– (4) BS can limit the number of femto BS in neighboring femto BS
message.
– (5) BS can unicast a list of femto BSs, which are not included in
broadcast neighboring femto BS message.
Proposed SDD Text
A macro BS shall broadcast neighbor advertisement message including
femto cell information, which is used for MSs to scan neighboring femto
BSs as well as neighboring macro BSs. It is possible that the femto cell
information is collected from handoff history and femto cells' reports. It can
also be configured manually. A macro BS can append or remove the femto
cell information depending on MSs' measurement results over neighboring
macro BSs in order to provide optimal neighbor advertisement message.
Thank You