Transcript IEEE C802.16m-09/2378

BW Configuration and SA-Preamble Structure with Tone-Dropping (15.3.2.4 and 15.3.6.1)
IEEE 802.16 Presentation Submission Template (Rev. 9)
Document Number:
IEEE C80216m-09_2378
Date Submitted:
2009-11-06
Source:
Jinsoo Choi, HanGyu Cho, Jin Sam Kwak
{emptylie, hgcho, samji}@lge.com
LG Electronics
Re:
Comments on P802.16m/D2 for recirculation #30a
Purpose: To be discussed and adopted in TGm for the 802.16m amendment
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1
Overview
 Current PA-Preamble index table reserves several configuration
considering other bandwidth cases with tone-dropping.
 With tone-dropping, followings are need to be defined
 Tone-dropped BW configuration
 SA-Preamble subblock structure based on the tone-dropped BW configuration
 Consideration points
 Minimize system impacts regarding
 Subchannelization rule defined in DL PHY Structure
 SA-Preamble subblock structure defined in DL Control Structure
 Support BW and SA-Preamble configuration as much as possible (for flexible support
for tone-dropping) while maintaining the condition of minimizing system impacts
 How can we resolve this issue considering above points?
 Maintain the subband-granularity based resource usage for tone-dropped BW
 Maintain the subblock-granularity based resource usage for SA-preamble
 Support SA-Preamble structure which have subblocks as many as possible within the
tone-dropped BW.
2
Current BW configuration in PA-Preamble series
3
Current SA-Preamble subblocks
<Allocation of sequence subblocks for each FFT>
<Multi antenna example for 512 FFT>
<Multi antenna example for 1024 FFT>
<Multi antenna example for 2048 FFT>
4
Considering tone-dropping process
10MHz bandwidth
subband
System bandwidth
E
F
G
Sub
block
H
A
B
C
D
E
F
G
H
A
B
C
D
SA-Preamble
DC
Subband based dropping
8.33MHz bandwidth
System bandwidth
subband
Subblock based dropping
G
H
A
Sub
block
B
C
D
E
F
G
H
A
B
SA-Preamble
<Figure: Example of tone-dropping from 10MHz to 8.33MHz BW (Dropping two subbands)>
Note: Based on the subband dropping in each boundary side of BW, subblocks for
SA-Preamble are dropped with subblock granularity as the size of SA-Preamble is
equal to or less than that of tone-dropped BW.
5
Tone-dropped BW configuration and parameters
Index
The nominal channel BW
Number of used
subcarriers
(including DC)
0
5<BW<6.66MHz
433
296
295
1
6.66<=BW<8.33MHz
577
224
223
2
8.33<=BW<10MHz
721
152
151
3
10<BW<11.66MHz
865
592
591
4
11.66<=BW<13.33MHz
1009
520
519
5
13.33<=BW<15MHz
1153
448
447
6
15<=BW<16.66MHz
1297
376
375
7
16.66<=BW<18.33MHz
1441
304
303
8
18.33<=BW<20MHz
1585
232
231
Number of left guard
subcarriers
Number of right guard
subcarriers
<Table-x: BW configuration and OFDMA parameters>
Note: BW range of the configuration is applied based on two subband granularity for
tone dropping. If it is not sure whether different BWs are coexisting or not in a cell,
two subband based dropping (one subband in each boundary of BW) is
recommended for maintaining subband alignment.
6
PA-Preamble series
Index
Carrier
BW
Series to modulate
0
5MHz
…
1
5<BW<6.66MHz
…
2
6.66<=BW<8.33MHz
…
3
8.33<=BW<=10MHz
…
10<BW<11.66MHz
…
11.66<=BW<13.33MHz
…
6
13.33<=BW<15MHz
…
7
15<=BW<16.66MHz
…
8
16.66<=BW<18.33MHz
…
9
18.33<=BW<=20MHz
…
N/A
…
4
5
10
Fully
configured
Partially
configured
<Table-y: PA-Preamble series>
Note: It would be clear to set exact BW information instead of BW range, because we
can only know BW information through PA-Preamble. But it is difficult to decide the
BW values (that operators will want) in this moment. Rather than leaving as just
reserved status, it is recommended to have some fields to guide future selection.
7
SA-Preamble subblock structure
Index
Tone-dropped BW
Dropped subblock(s)
Allocation of sequence subblocks for SA-Preamble
0
5<BW<6.25MHz
0
ABCD | EFGH
1
6.25<=BW<7.5MHz
6
HABCD | EFGHA
2
7.5<=BW<8.75MHz
4
GHABCD | EFGHAB
3
8.75<=BW<10MHz
2
FGHABCD | EFGHABC
4
10<BW<11.25MHz
0
EFGHABCD | EFGHABCD
5
11.25<=BW<12.5MHz
14
DEFGHABCD | EFGHABCDE
6
12.5<=BW<13.75MHz
12
CDEFGHABCD | EFGHABCDEF
7
13.75<=BW<15MHz
10
BCDEFGHABCD | EFGHABCDEFG
8
15<=BW<16.25MHz
8
ABCDEFGHABCD | EFGHABCDEFGH
9
16.25<=BW<17.5MHz
6
HABCDEFGHABCD | EFGHABCDEFGHA
10
17.5<=BW<18.75MHz
4
GHABCDEFGHABCD | EFGHABCDEFGHAB
11
18.75<=BW<20MHz
2
FGHABCDEFGHABCD | EFGHABCDEFGHABC
<Table-z: SA-Preamble subblock allocation>
Note: Two subblocks (one subblock in each boundary of BW) are dropped. In multi
antenna cases, above SA-Preamble subblock structure can be applied as the existing
antenna configuration rule.
8
Proposed text
<Proposed remedy-1>
Insert the following table into line 62 of page 264 of P802.16m/D2
-----------------------------------------------------Text start--------------------------------------------------------<Table xxx- OFDMA parameters with 1024 FFT for tone-dropped BW>
The nominal channel bandwidth,
BW (MHz)
Number of used subcarriers
(including DC)
Number of left guard subcarriers
Number of right guard
subcarriers
5<BW<6.66MHz
433
296
295
6.66<=BW<8.33MHz
577
224
223
8.33<=BW<10MHz
721
152
151
<Table yyy - OFDMA parameters with 2048 FFT for tone-dropped BW>
The nominal channel bandwidth,
BW (MHz)
Number of used subcarriers
(including DC)
Number of left guard subcarriers
Number of right guard
subcarriers
10<BW<11.66MHz
865
592
591
11.66<=BW<13.33MHz
1009
520
519
13.33<=BW<15MHz
1153
448
447
15<=BW<16.66MHz
1297
376
375
16.66<=BW<18.33MHz
1441
304
303
18.33<=BW<20MHz
1585
232
231
-----------------------------------------------------Text end---------------------------------------------------------9
Proposed text (cont’d)
<Proposed remedy-2>
Modify the “BW” column in Table 780 of page 314 of P802.16m/D2 as following
-----------------------------------------------------Text start--------------------------------------------------------<Table 780- PA-Preamble series>
Index
Carrier
BW
Series to modulate
0
5MHz
1
5<BW<6.66MHz
2
6.66<=BW<8.33MHz
92161C7C19BB2FC0ADE5CEF3543AC1B6CE6BE1C8DCABDDD319EAF7
3
8.33<=BW<=10MHz
6DE116E665C395ADC70A89716908620868A60340BF35ED547F8281
4
5
Fully
configured
10<BW<11.66MHz
11.66<=BW<13.33MHz
6DB4F3B16BCE59166C9CEF7C3C8CA5EDFC16A9D1DC01F2AE6AA08F
1799628F3B9F8F3B22C1BA19EAF94FEC4D37DEE97E027750D298AC
BCFDF60DFAD6B027E4C39DB20D783C9F467155179CBA31115E2D04
7EF1379553F9641EE6ECDBF5F144287E329606C616292A3C77F928
6
13.33<=BW<15MHz
8A9CA262B8B3D37E3158A3B17BFA4C9FCFF4D396D2A93DE65A0E7C
7
15<=BW<16.66MHz
DA8CE648727E4282780384AB53CEEBD1CBF79E0C5DA7BA85DD3749
8
16.66<=BW<18.33MHz
3A65D1E6042E8B8AADC701E210B5B4B650B6AB31F7A918893FB04A
9
18.33<=BW<=20MHz
D46CF86FE51B56B2CAA84F26F6F204428C1BD23F3D888737A0851C
N/A
640267A0C0DF11E475066F1610954B5AE55E189EA7E72EFD57240F
10
Partially
configured
-----------------------------------------------------Text end---------------------------------------------------------10
Proposed text (cont’d)
<Proposed remedy-3>
Insert the following description into line 17 of page 317 of P802.16m/D2
-------------------------------------------------------Text start--------------------------------------------------------The basic unit of dropping for SA-Preamble is two sub-blocks that the configuration of tone-dropped nominal channel bandwidth has the
granularity of 1.25MHz for the SA-Preamble sequence. The allocation of sequence sub-blocks for tone dropping is applied by dropping
one sub-block in each boundary of bandwidth, as the size of SA-Preamble is equal to or less than that of tone-dropped bandwidth. Table
xxx shows the allocation of sequence sub-blocks for SA-Preamble based on the tone dropped nominal channel bandwidth.
In multi antenna systems, based on Table yyy, the allocation of sequence sub-blocks for tone dropping can be applied as the same rule
represented in Figure 505, 506 and 507.
<Table yyy- Allocation of sequence sub-blocks with tone dropping>
Index
Tone-dropped nominal
channel BW
Dropped
subblock(s)
Allocation of sequence subblocks for SA-Preamble
0
5<BW<6.25MHz
0
ABCD | EFGH
1
6.25<=BW<7.5MHz
6
HABCD | EFGHA
2
7.5<=BW<8.75MHz
4
GHABCD | EFGHAB
3
8.75<=BW<10MHz
2
FGHABCD | EFGHABC
4
10<BW<11.25MHz
0
EFGHABCD | EFGHABCD
5
11.25<=BW<12.5MHz
14
DEFGHABCD | EFGHABCDE
6
12.5<=BW<13.75MHz
12
CDEFGHABCD | EFGHABCDEF
7
13.75<=BW<15MHz
10
BCDEFGHABCD | EFGHABCDEFG
8
15<=BW<16.25MHz
8
ABCDEFGHABCD | EFGHABCDEFGH
9
16.25<=BW<17.5MHz
6
HABCDEFGHABCD | EFGHABCDEFGHA
10
17.5<=BW<18.75MHz
4
GHABCDEFGHABCD | EFGHABCDEFGHAB
11
18.75<=BW<20MHz
2
FGHABCDEFGHABCD | EFGHABCDEFGHABC
---------------------------------------------------------Text end-------------------------------------------------------11