802.16m SDD Proposal

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802.16m SDD Proposal
Document Number: 802.16m-07_240
Date Submitted: November 12, 2007
Source:
Hokyu Choi, Jaeweon Cho,
Samsung Electronics
Voice:
E-mail:
[Telephone Number (optional)]
choihk@samsung.com
jaeweon.cho@samsung.com
Venue:
Atlanta, GA
Base Contribution:
Call for Contributions on IEEE 802.16m System Description Document 802.16m-07_040
Purpose:
Discussion and approval by TGm for the 802.16m SDD
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.
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The 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 IEEE’s name any IEEE Standards publication even though it may include portions of this
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also acknowledges and accepts that this contribution may be made public by IEEE 802.16.
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Self Organizing Networks
2
Self Organizing Network Architecture
SO Network architecture
EMS
(SO)
BS
(SO)
R1
BS
(SO)
Data Plane
R1
Control Plane
MS
MS
Management
Plane
Scope of 16m
•
•
Self Organization (SO) includes self-configuration and self-optimization.
Element Management System (EMS) performs SO functions over BSs.
•
•
BS performs SO functions over neighboring BSs and MSs.
MS may perform measurement and report for SO operations.
–
EMS is not in the scope of 16m
3
Self Organization Mechanism
Management plane
Data/control plane
EMS
SON
Function
Higher Layer
BS
Convergence Sublayer
Self
Organization
SON
Function
MAC Common Part Sublayer
Fragmentation/Packing
Control Signaling
MAC PDU formation
Resource
Mapping
Encryption
Measurement
PHY Layer
Control
•
Management
Scope of 16m project
SO procedures & signaling
–
Procedures may include measurement request/response for SO mechanism.
–
SO reference signals may be defined to enhance the SO mechanisms.
•
Control signaling block may send the SO reference signal under supervision of SO block
4
Multi-Carrier Support
5
Definitions
• Multiple RF and PHY
• Packet aggregation in MAC layer
Multi-carrier
Scalable Bandwidth
• Same OFDM symbol length
• Same frequency subcarrier spacing
5MHz
5MHz
5MHz
10MHz
5MHz
10MHz
20MHz
Single-carrier
6
Possible Single/Multi-Carrier Scenarios
•
•
Single carrier BS
Multi carrier BS
– Contiguous vs. Non-contiguous
– Single or multiple bandwidths
– Packet combined in MAC layer
BS
BS-1 BS-2
MS
MS
MS
MS
MS
MS
MS
MS
MS
MS
BS
BS RF+PHY
MS
MS RF+PHY
MS
Realistic case
Frequency Overlay
7
MIMO Architecture
8
MIMO Architecture
iFFT
Buffer Data
Packets
selection
Resource block
parsing
Bit streams
Bit-level
processing
QAM
modulation
MIMO Encoding
and Mapping
(to a basic timefrequency
resource)
Codewords
Symbols per
transmit antenna
OFDMA
Framing
iFFT
User selection
Resource allocation
Number of
codewords
MCS setting
Space-time encoding
(STC, SM)
Closed-loop precoding
(vector, matrix)
Downlink control channels
RRM, Scheduler
Uplink feedback channels
CQI and CSI feedback
Retransmission success/failure indication
Coordination among multiple base stations
Feedback requests and
resource allocations to
mobile stations
Open-loop/closed-loop MIMO
adaptation
Single-user/multiuser MIMO
adaptation
9
MIMO Encoding and Mapping Block
• MIMO processing is uniquely described by the encoding and mapping:
– Input: codewords of modulated symbols
– Output: basic time-frequency resource block for each transmit antenna
• A specific MIMO mode only needs adapting the processing blocks
within the MIMO encoding and mapping block
• Selection of MIMO mode for adaptation to operating conditions may
be based (among other things) on feedback of
– Channel Quality Information (CQI)
– Channel State Information (CSI)
• CQI and CSI may both be used in the scheduler, but also:
– CQI: for modulation and coding rate adaptation in bit-level processing
– CSI: for signal processing within MIMO encoding and mapping block
10
MIMO Encoding & Mapping
MIMO Encoding & Mapping
Single-user / multiuser
Single / multiple
codewords
One codeword for
one MS
One codeword for
one MS
•
•
•
•
MIMO matrix construction
(layering, ST codeword)
Mapping of codeword
symbols to MIMO
matrix
OFDMA Framing
OL MIMO / CL MIMO
Precoder
Mapping matrix (or
vector) symbols to a
basic time-frequency
resource
Support of single and multiple codewords
Support of diversity, multiplexing, precoding
Support of SU/MU MIMO, OL/CL MIMO
Precoder support for closed-loop MIMO:
Mapping basic timefrequency resource
to subchannels
Other framing
processes
– Beamforming with one or several beams
– Beamforming to one or several users
– Adaptation to short-term and/or long-term CSI
11
Q&A
12
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