Resource allocation for FDMed E-MBS Data
IEEE 802.16 Presentation Submission Template (Rev. 9)
Document Number:
IEEE C80216m-09_2049r2
Date Submitted:
2009-09-20
Source:
Dongcheol Kim, Wookbong Lee, Jin Sam Kwak,
HanGyu Cho, Bin-Chul Ihm, Jinsoo Choi
LG Electronics
{dongcheol.kim, emptylie}@lge.com
Re:
C802.16m-09/2166, E-MBS DG output
Purpose:
Notice:
To discuss and adopt in TGm
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Overview
• In order to support E-MBS traffic in the downlink
frame in the FDMed with unicast traffic, resource
allocation scheme is needed.
• E-MBS related information is sent from ABS
through SFH or other broadcast channel.
• Text is proposed for Section 15.3.5.6, “Downlink
Physical Structure for E-MBS Support”
Resource allocation methods
• E-MBS traffic is only allowed to be carried on
frequency partition FP0 with N1 CRUs.
pros
Cons
Subband
allocation
•Better channel estimation •Lower diversity gain (But, MBSFN gain can
performance based on N1 compensate it).
•No impact on
subchannelization
DRU
allocation
• Higher diversity gain
•Worse channel estimation performance
based on N2
•Impact on subchannelization due to DRU
assignment for MBS
•DRU diversity loss of Unicast
•Possible impact on DL control due to DRU
shortage
Subchannelization for E-MBS Data
Figure 1 . Subchannelization for E-MBS Data
Proposed text
• Insert the following section and the text into line 18 of
page 2 of C802.16m-09/2166
15.3.5.6 Downlink Physical Structure for E-MBS Support
15.3.5.6.1. Subchannelization for E-MBS
E-MBS data is transmitted using subband CRU in frequency
partition FP0. For MBSFN support, E-MBS data is assigned
from the lowest LRU index of subband CRUs. Then, the
subcarrier permutation which is defined in <<15.3.5>> is applied
for the whole subband CRUs assigned for the E-MBS data.