Frame Structure for Talk-around Direct Communications
Document Number:
IEEE S802.16n-11/0152
Date Submitted:
2011-09-20
Source:
Young-Ho Jung , Jihoon Choi
Korea Aerospace University
E-mail: yhjung@kau.ac.kr,
jihoon@kau.ac.kr,
Sungcheol Chang, Seokki Kim, Eunkyung Kim, Miyoung Yun, Won-Ik Kim,
Sungkyung Kim, Hyun Lee, Chulsik Yoon, Kwangjae Lim
ETRI
E-mail: scchang@etri.re.kr
Re:
Call for comments on the 802.16n AWD
Base Contribution:
IEEE C802.16n-11/0152
Purpose:
To be discussed and adopted by 802.16 TGn
Notice:
This 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.
Copyright Policy:
The contributor is familiar with the IEEE-SA Copyright Policy <http://standards.ieee.org/IPR/copyrightpolicy.html>.
Patent Policy:
The contributor is familiar with the IEEE-SA Patent Policy and Procedures:
<http://standards.ieee.org/guides/bylaws/sect6-7.html#6> and <http://standards.ieee.org/guides/opman/sect6.html#6.3>.
Further information is located at <http://standards.ieee.org/board/pat/pat-material.html> and <http://standards.ieee.org/board/pat >.
Introduction
•
Resource allocation for TDC (talk-around direct communication)
– Some resources for infra-structure communication are reserved for TDC in
the FDM (frequency division multiplexing) manner.
– Common Direct Mode Zone (CDMZ): 4 PRUs having highest indices of
uplink resources (72 contiguous subcarriers in the frequency domain, see
IEEE C802.16n-11/0051r2)
– Common Direct Mode Zone – Extended (CDMZ-E): 4 PRUs having highest
indices of downlink resources (72 contiguous subcarriers in the frequency
domain)
– Cell Specific Direct Mode Zone (CSDMZ): determined by each HR-BS
independently (UL or DL resource): multiple of 4 PRUs
•
Frame structure for TDC
– CDMZ: The resources assigned for CDMZ are composed of Sync-CH
(synchronization channel), Ded-CH (dedicated channel), and Sup-CH
(supplementary channel).
– CDMZ-E, CSDMZ: Ded-CH, Sup-CH (no Sync-CH)
2
Resource Allocation for TDC
•
•
•
Common Direct Mode Zone (CDMZ): set of uplink PRUs with fixed size and positions
which are commonly assigned to all cells (must be CRU)
Common Direct Mode Zone - Extended (CDMZ-E): set of downlink PRUs with fixed size
and positions which are commonly assigned to all cells (must be CRU). Use of CDMZ-E is
indicated by Sync-CH IE transmitted in CDMZ
Cell Specific Direct Mode Zone (CSDMZ): additionally assigned direct-mode resource
blocks independently assigned by each HR-BS (CRU or DRU) and information to receive
cell specific direct mode region can be obtained from common direct mode zone
3
Construction of TDC frame (CDMZ)
• Example. 3 uplink subframes/ 5msec frame
– Synchronization Channel (Sync-CH): 1st subframe of each superframe
– Dedicated Channel(Ded-CH): 1st subframe of the 2nd and 4th frame
– Supplementary Channel(Sup-CH): the other subframes
4
Resource segmentation for TDC frame (CDMZ)
Super frame
Super frame
CDMZ
Super frame
CDMZ
CDMZ
mRB
3-1
mRB
2-2
mRB
3-2
mRB
2-3
mRB
3-3
mRB
2-4
mRB
3-4
mRB
2-5
mRB
3-5
mRB
2-6
mRB
3-6
mRB
2-7
mRB
3-7
mRB
2-8
mRB
3-8
mRB
2-9
mRB
3-9
mRB
2-10
mRB
3-10
mRB
2-11
mRB
3-11
mRB
2-12
mRB
3-12
m-tile 1
m-tile 2
m-tile 3
m-tile 4
m-tile 5
m-tile 6
m-tile 7
m-tile 8
m-tile 9
m-tile 10
m-tile 11
m-tile 12
m-tile 13
m-tile 14
m-tile 15
m-tile 16
m-tile 17
m-tile 18
m-tile 19
m-tile 20
m-tile 21
m-tile 22
m-tile 23
m-tile 24
m-tile 25
m-tile 26
m-tile 27
m-tile 28
m-tile 29
m-tile 30
m-tile 31
m-tile 32
m-tile 33
m-tile 34
m-tile 35
m-tile 36
mRB
5-1
mRB
6-1
mRB
5-2
mRB
6-2
mRB
5-3
mRB
6-3
mRB
5-4
mRB
6-4
mRB
5-5
mRB
6-5
mRB
5-6
mRB
6-6
mRB
5-7
mRB
6-7
mRB
5-8
mRB
6-8
mRB
5-9
mRB
6-9
mRB
5-10
mRB
6-10
mRB
5-11
mRB
6-11
mRB
5-12
mRB
6-12
subframe
time
frequency
mRB
2-1
Slot 2
…
mRB (mini-resource block)
time
frequency
Sync-CH_message
Sync-CH_sequence
Slot 1
CDMZ
m-tile (mini-tile)
Example. 3 uplink subframes/ 5msec frame
5
Resource segmentation for TDC frame
(CDMZ-E, CSDMZ)
Super frame
Super frame
CDMZ-E or
CSDMZ
Super frame
CDMZ-E or
CSDMZ
CDMZ-E or
CSDMZ
Slot 1
mRB
3-1
mRB
1-2
mRB
2-2
mRB
3-2
mRB
1-3
mRB
2-3
mRB
3-3
mRB
1-4
mRB
2-4
mRB
3-4
mRB
1-5
mRB
2-5
mRB
3-5
mRB
1-6
mRB
2-6
mRB
3-6
mRB
1-7
mRB
2-7
mRB
3-7
mRB
1-8
mRB
2-8
mRB
3-8
mRB
1-9
mRB
2-9
mRB
3-9
mRB
1-10
mRB
2-10
mRB
3-10
mRB
1-11
mRB
2-11
mRB
3-11
mRB
1-12
mRB
2-12
mRB
3-12
m-tile 1
m-tile 2
m-tile 3
m-tile 4
m-tile 5
m-tile 6
m-tile 7
m-tile 8
m-tile 9
m-tile 10
m-tile 11
m-tile 12
m-tile 13
m-tile 14
m-tile 15
m-tile 16
m-tile 17
m-tile 18
m-tile 19
m-tile 20
m-tile 21
m-tile 22
m-tile 23
m-tile 24
m-tile 25
m-tile 26
m-tile 27
m-tile 28
m-tile 29
m-tile 30
m-tile 31
m-tile 32
m-tile 33
m-tile 34
m-tile 35
m-tile 36
subframe
mRB
5-1
mRB
6-1
mRB
5-2
mRB
6-2
mRB
5-3
mRB
6-3
mRB
5-4
mRB
6-4
mRB
5-5
mRB
6-5
mRB
5-6
mRB
6-6
mRB
5-7
mRB
6-7
mRB
5-8
mRB
6-8
mRB
5-9
mRB
6-9
mRB
5-10
mRB
6-10
mRB
5-11
mRB
6-11
mRB
5-12
mRB
6-12
time
frequency
mRB
2-1
Slot 2
…
mRB (mini-resource block)
time
frequency
mRB
1-1
CDMZ-E or
CSDMZ
m-tile (mini-tile)
Example. 3 uplink subframes/ 5msec frame
6
PHY Channels for TDC
• Synchronization Channel (Sync-Ch)
– Includes 6 OFDM symbols (1st subframe of each superframe in CDMZ)
– The Sync-CH uses 72 contiguous subcarriers in the frequency domain
– In the time domain, first three symbols are used for the Sync-CH
preamble (P-SCH1) and last three symbols are used for the Sync-CH
message (P-SCH2)
– See IEEE C802.16n-11/0153 for more details
Subframe
CP
Conventional
SYNC-CH
A
A
A
A
SYNC-CH preamble
Proposed
SYNC-CH
(Seq. 0)
B
B
B
B
SYNC-CH IE
B
B
B
SYNC-CH preamble
Proposed
SYNC-CH
(Seq. 1)
C
-C
C
-C
SYNC-CH preamble
SYNC-CH IE
C
-C
C
SYNC-CH IE
7
PHY Channels for TDC
• Dedicated Channel(Ded-CH)
– Dedicated sub-channel: set of 12 mRBs allocated across all assigned
PRUs in the same slot (to obtain freq. diversity)
– Transmit data packets and control packets
– See IEEE C802.16n-11/0160 for more details
– The number of dedicated sub-channels according to Nsubframe_per_fame (CDMZ)
Nsubframe_per_fame
2
3
4
5
The number of dedicated The number of dedicated
sub-channels in the slot 1 sub-channels in the slot 2
(Nded-subchannel,1)
(Nded-subchannel,2)
2
3
4
5
6
7
8
9
Total number of dedicate
d sub-channels
(Nded-subframe)
5
9
13
17
– The number of dedicated sub-channels according to Nsubframe_per_fame (CDMZ-E,
CSDMZ)
Nsubframe_per_fame
2
3
4
5
The number of dedicated The number of dedicated
sub-channels in the slot 1 sub-channels in the slot 2
(Nded-subchannel,1)
(Nded-subchannel,2)
3
3
5
5
7
7
9
9
Total number of dedicate
d sub-channels
(Nded-subframe)
6
10
14
18
8
PHY Channels for TDC
• Dedicated Channel(Ded-CH)
– mRB assignment method for dedicated subchannels
 Step 1: For each slot 12 successive mRBs are temporally assigned from subframe 1 to
subframe Nded-subframe,1 in slot 1, and from subframe Nded-subchannel,1+1 to subframe Ndedsubchannel,1 + Nded-subchannel,2 in slot 2, in time first manner.
 Step 2: For each subframe mRBs are permuted by using the permutation sequence
generated by using the method in 16.3.4.3.3 with parameters of M=12, and SEED =
343*subframe index
Subframe index
2
3
4
5
6
7
8
9
10
11
2
3
5
6
7
8
9
11
12
1
1
3
2
1
4
5
8
8
7
7
2
4
3
4
1
6
7
9
9
6
12
4
10
1
1
1
1
5
5
5
5
5
2
1
1
1
1
5
5
5
5
5
3
1
1
1
1
5
5
6
6
6
3
2
4
2
1
9
6
6
8
5
4
2
2
2
2
6
6
6
6
6
4
4
3
2
1
5
8
7
9
7
5
2
2
2
2
6
6
6
6
7
5
2
1
3
2
6
9
7
5
5
2
2
2
2
7
7
7
7
7
6
4
1
1
3
5
6
8
5
7
3
3
3
3
7
7
7
7
7
7
3
4
3
2
7
9
6
6
9
3
3
3
3
7
8
8
8
8
8
1
4
3
4
7
7
5
9
8
9
3
3
3
3
8
8
8
8
8
9
2
1
2
4
8
5
6
7
8
10
4
4
4
4
8
8
8
9
9
10
3
3
4
3
8
5
5
6
6
11
4
4
4
4
9
9
9
9
9
11
1
2
4
2
7
8
9
8
9
12
4
4
4
4
9
9
9
9
9
12
1
2
1
3
9
5
8
6
9
6
7
8
Step 1: temporal assignment
Sync-CH sequence
Sync-CH message
1
Sync-CH sequence
Sync-CH message
mRB index
1
Step 2: permutation in the subframe
9
PHY Channels for TDC
• Supplementary Channel (Sup-CH)
– Supplementary sub-channel: set of 4 mini-tiles in the same subframe
– mini-tile: 2 subcarriers x 5 OFDM symbols (6th OFDM symbol is empty
symbol (guard time) for Tx. Rx. switiching time
– Sup-CH for Ded-CH in slot 1 exists in slot 2, and Sup-CH for Ded-CH in
slot 2 exists in slot 1 (1:1 correspondence between a supplementary
sub-channel and a dedicated sub-channel)
– Transmits indication of MAC messages, PHY signalings and short
feedback messages related with the corresponding dedicated subchannel
– See IEEE C802.16n-11/0153 for more details
– Assignment of mini-tiles for the supplementary subchannel
 For the n-th supplementary subchannel, four mini-tiles with indices of mod(mini-tile
index-1, 9)+1 = mod(n-1, 9)+1 in the different slot are assigned
 Example: for the 5-th supplementary subchannel, mini-tile 5, 14, 23 and 32 are
assigned
10
Proposed Text
• See IEEE C802.16n-11/0152
11