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ProjectIEEE 802.16 Broadband Wireless Access Working Group <HYPERLINK "http://ieee802.org/16"http://ieee802.org/16>TitleOn AMS Reporting the Accessibility of CSG-closed Femto ABSDate Submitted2010-10-24Source(s)Ying Li, Anshuman Nigam,
Sudhir Ramakrishna, Young Bo Cho,
Jung Je Son, Kaushik Josiam, Zhouyue Pi
Samsung Electronics
Phone: +1-972-761-7903
E-mail: HYPERLINK "mailto:yli2@sta.samung.com"yli2@sta.samung.com
*<HYPERLINK "http://standards.ieee.org/faqs/affiliationFAQ.html"http://standards.ieee.org/faqs/affiliationFAQ.html>Re:IEEE 802.16m D9 change requests.
AbstractThis contribution is to propose changes in support femtocells.PurposeTo be discussed and adopted by WG SBNoticeThis 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.ReleaseThe 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 IEEEs name any IEEE Standards publication even though it may include portions of this contribution; and at the IEEEs 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 802.16.Patent PolicyThe contributor is familiar with the IEEE-SA Patent Policy and Procedures:
<HYPERLINK "http://standards.ieee.org/guides/bylaws/sect6-7.html" \l "6"http://standards.ieee.org/guides/bylaws/sect6-7.html#6> and <HYPERLINK "http://standards.ieee.org/guides/opman/sect6.html" \l "6.3"http://standards.ieee.org/guides/opman/sect6.html#6.3>.
Further information is located at <HYPERLINK "http://standards.ieee.org/board/pat/pat-material.html"http://standards.ieee.org/board/pat/pat-material.html> and <HYPERLINK "http://standards.ieee.org/board/pat"http://standards.ieee.org/board/pat>.On AMS Reporting the Accessibility of CSG-closed Femto ABS
Ying Li, Anshuman Nigam, Jung Je Son, Young Bo Cho
Kaushik Josiam, Sudhir Ramakrishna, Zhouyue Pi
Samsung Electronics
Introduction
Problem: In the current draft D8, the scanning report message does not include the indicator of whether the detected CSG-closed femtocell is in the AMSs local whitelist. Since AMS should have a whitelist to check whether the detected femtocell is in the whitelist or not, if AMS reports this information, it gives the ABS some free information, which it otherwise would have to realize through some extra processing. The ABS needs to know whether the AMS is accessible to the reported cell for different follow-up operations:
If it is accessible, the ABS may use the cell as handover candidate
If it is inaccessible, the AMS may use the cell as the one to coordinate interference mitigation
If the AMS would not report whether the CSG-clsoed femto is in its whitelist or not, the ABS had to check about it via the backhaul every time when the AMS reports CSG-closed femtocell, because the ABS may not have the AMSs whitelist or subscription information, and the backhaul check adds on the latency for the ABS to perform the handover or interference mitigation, which are very importantly to be timely treated.
Remedy:
Add one bit of the indicator of whether the detected femtocell is in the AMSs local whitelist, in AAI_SCN-REP.
Proposed Text
Please revise D8 as follows.
----------------------------------------------------- Start of Proposed Text -----------------------------------------------------
16.4.8.1.2 AMS scanning of neighbor Femto ABSs
[Insert the following on page 896, line 27]
AMS may include the CSGID(s) of the subscribed CSG femto BSs in the AAI-SCN-REP message.
If the AMS reports CSG-closed Femto ABS detected by autonomous scanning, the AMS should report in AAI_SCN-REP an indication on whether the detected CSG-closed Femto ABS is in its whitelist, to help the ABS timely decide whether to perform handover or interference mitigation.
16.2.3.16 AAI_SCN-REP
[Modify Table 693, page 151, line 7-12]
Table 693AAI_SCN-REP parameters
.N_Reported_ABS_Full6Number of neighbor ABS [0..63] reported in this message, which are using full 48-bit BSID.Present only when the scanning report includes ABSs referred using ABS IDIf (N_Reported_ABS_Full > 0)
{
If (Rsp_Bitmap_Index is present) {
Rsp_Bitmap_IndexVariable (Rsp_Bit map_Size)Index of the corresponding AAI_SCN-RSP message, where the least significant bit corresponds to the first ABS Index, each next significant bit corresponds to the next ABS Index, the most significant bit corresponds to the ABS Index of the last reported ABS, and ABSs with ABS Index greater than the last reported ABS are not reported and do not have a corresponding bit position in the bitmap.
Bitmap position bit value:
0: the corresponding ABS is not reported.
1: the corresponding ABS is reported.Present if N_Reported_ABS_Full > 0} else {
NumCSGClosed6Number of CSG closed ABSs indicated in fullBsIdArr Present if N_Reported_ABS_Full > 0 NumCSGClosedWhitelist 6 Number of CSG closed ABSs in AMSs whitelist, among the ABS IDs indicated in fullBsIdArr Present if N_Reported_ABS_Full > 0 For(i=0; i< N_Reported_ABS_Full; i++) {
Reported ABS ID48ABS-IDs of the ABSs reported in this message
NumCSGClosedWhitelist IDs for CSG ABS in the AMSs whitelist appear first, followed by (NumCSGClosed NumCSGClosedWhitelist) IDs of CSG ABSs not in AMSs whitelist, followed by other ABS IDs.
------------------------------------------------------ End of Proposed Text ------------------------------------------------------
IEEE C802.16m-10/1287
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