Transcript IEEE C802.16m-07/193r1

Proposed 802.16m Performance Value
IEEE 802.16 Presentation Submission Template (Rev. 9)
Document Number:
C802.16m-07/193
Date Submitted:
2007-09-17
Source:
Jin Sam Kwak, Wookbong Lee, Young Hyoun Kwon,
Kiseon Ryu, Ronny (Yong-Ho) Kim, Minseok Oh
LG Electronics
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Venue:
Call for Reply Comments on 80216m-07_032
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Purpose:
For 802.16m discussion
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Proposed Throughput Requirements
• User/Sector Throughput (Section 7.1 & 7.2)
Metric
Cmt. #90, #103
Cmt. #92
Cmt. #94, #101
DL
UL
DL
UL
DL
UL
Average user throughput
(bps/Hz/user)
0.32(a)
0.14(a)
0.32(b)
0.11(b)
0.26(c)
0.13(c)
Cell edge user throughput
(bps/Hz/user)
-
-
1.6(b)
0.8(b)
0.1(c)
0.06(c)
Sector Throughput
(bps/Hz/sector)
3.2(d)
1.4(d)
-
-
2.6(e)
1.3(e)
(a) Comment #90, (b) Comment #92 (recalculated for consistency), (c) Comment #94, (d) Comment #103, (e)
Comment #101
Comment on Suggested Remedy
• Throughput comparison between Reference System and LTE(†)
Metric
Average user throughput
(bps/Hz/user)
Cell edge user throughput
(bps/Hz)
Sector Throughput
(bps/Hz/sector)
Reference System
3GPP LTE
DL
UL
DL
UL
0.129
(0.102)
0.04
(0.032)
1.29
(1.02)
0.0756
(0.063)
0.0384
(0.032)
0.756
(0.63)
0.212
(0.162)
0.072
(TBD)
0.031
(TBD)
0.72
(TBD)
0.077
(0.059)
2.12
(1.62)
(†) The value in parenthesis shows the L1-throughput with control overhead, and the other is L1-throughput. Our simulation
assumptions are further specified in the annex I.
• In order for the 16m system to have a competitive edge over current
existing system (e.g., 3GPP LTE, 3GPP2 UMB) and its evolution, while
meeting the IMT-Advanced requirements, the suggested remedy in the
following slide should be adopted for the relative and absolute
throughput.
Suggested Remedy
• Absolute Throughput Performance
Metric
DL
UL
Average user throughput
(bps/Hz/user)
> 0.32 (0.27)
> 0.15 (0.13)
Cell edge user throughput
(bps/Hz)
> 0.12 (0.10)
> 0.08 (0.07)
Sector Throughput
(bps/Hz/sector)
> 3.2 (2.7)
> 1.5 (1.3)
c.f.) The proposed absolute throughputs are approximately 1.5x (DL) over LTE performance and 2x (UL) over reference
performance.
Note : The value in parenthesis shows the L1-throughput with control overhead (assuming 15% DL/UL overhead), and
the other is L1- throughput. After the definition of the throughput is clarified, the specific throughput requirements can be
determined.
Annex I: Simulation Assumptions
• Simulation assumptions are the same as 16m evaluation
methodology document (80r3, table 1, table 2) except for
SIMO transmission for UL due to unclear description of uplink
CSM scheduling
• We use NGMN test scenarios (with uncorrelated spatial
channel model option) except for operation bandwidth for LTE
simulation which is bandwidth 5MHz each and BS power of
43 dBm
• MMSE receiver, rank adaptation with mode switching
message every 4 CQI report period, perfect channel
estimation, no CQI or ACK/NACK error
• CQI report every 5ms for both system, feedback delays are
15ms for reference system and 4ms for LTE system
Annex I: Simulation Assumptions
(Continued)
• The layer-1 throughput with the MAP
overhead (6 OFDM symbols for reference
system and 3 OFDM symbols for LTE system)
is evaluated
– Around 21% MAP overhead for reference system
(6 symbols over 29 symbols) and 24% overhead
for LTE system (900 subcarriers over 3800
subcarriers)