High Level Views on Multicarrier Operations for IEEE 802.16m
Document Number: S802.16m-08/327
Date Submitted: 2008-05-6
Source:
Kelvin Chou
Yih-Shen Chen
I-Kang Fu
Paul Cheng
Kelvin.Chou@mediatek.com
Yihshen.Chen@mediatek.com
IK.Fu@mediatek.com
Paul.Cheng@mediatek.com
MediaTek Inc.
No.1, Dusing Rd. 1, HsinChu Science-Based Industrial Park,
HsinChu, Taiwan 300, R.O.C.
Venue: Macau, China
Base Contribution: C802.16m-08/327
Purpose: To be discussed and adopted 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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Sketch of the Multicarrier System
• What we want to know about the system
– How does it look like?
– How does it operate?
– What it can do? What it cannot do?
2
802.16e System State Diagram
Power Down
Power Off
Normal Re-Entry
Fast Re-Entry
Initialization State
Access State
Connected State
Power On
Ranging and UL
synchronization
(RNG-REQ/RSP)
Sleep mode
Scanning and DL
Synchronization
(Preamble Detection)
DL MAP (Common
Control Channel)
Acquisition
Broadcast Channel
Acquisition (DCD/
UCD)
Cell Selection
Decision
Basic Capability
Negotiation
(SBC-REQ/RSP)
Sleep
Interval
Listening
Interval
Network
Re-entry
Handover
Execution
Idle State
Active Mode
MS Authentication,
Authorization & Key
Exchange
(PKMv2/EAP)
Registration with
Serving BS
(REG-REQ/RSP)
Handover
Initialization
Paging
Available
Scanning Mode
Paging
Unavailable
: In case of failure
: Normal case
MAC CID
Establishment
IP Address
Assignment
3
Multicarrier System State Overview
802.16m MS
MAC
RF 1
RF 2
RF n
Power Off
Power Off
Power Off
Initial
Initial
Initial
Access
Access
Access
Connected
Connected
Connected
Idle
Idle
Idle
4
Possible MS States
• Example
– An MS with 2 RF carriers
– Markovian States
•
•
•
•
•
0: power off state
1: initial state
2: access state
3: connected state
4: idle state
RF1 state
RF2 state
0,4
1,4
2,4
4,3
4,4
0,3
1,3
2,3
3,3
4,3
0,2
1,2
2,2
3,2
4,2
0,1
1,1
2,1
3,1
4,1
0,0
1,0
2,0
3,0
4,0
5
Possible MS States (cont.)
State: (RF1, RF2)
0: Power off state
1: Initial state
3: Connected state
2: Access state
4: Idle state
• Idle mode assumptions
– Idle is idle, no more activity
– One idle carrier is enough
0,4
1,4
2,4
4,3
4,4
0,3
1,3
2,3
3,3
4,3
0,2
1,2
2,2
3,2
4,2
0,1
1,1
2,1
3,1
4,1
0,0
1,0
2,0
3,0
4,0
6
Possible MS States (cont.)
State: (RF1, RF2)
0: Power off state
1: Initial state
3: Connected state
2: Access state
4: Idle state
• Idle mode assumptions
– Idle is idle, no more activity
– One idle carrier is enough
0,4
• Initialization assumptions
– One-by-one RF activation
0,3
1,3
2,3
3,3
0,2
1,2
2,2
3,2
0,1
1,1
2,1
3,1
0,0
1,0
2,0
3,0
4,0
7
Possible MS States (cont.)
State: (RF1, RF2)
0: Power off state
1: Initial state
3: Connected state
2: Access state
4: Idle state
• Idle mode assumptions
– Idle is idle, no more activity
– One idle carrier is enough
0,4
• Initialization assumptions
– One-by-one RF activation
• Functionalities
– Every RF carrier can be the
primary carrier
– Data transmission can go
parallel with other
operations such as HO
0,3
1,3
2,3
3,3
0,2
3,2
0,1
3,1
0,0
1,0
2,0
3,0
4,0
8
RF#N
RF#3
RF#2
MS System Flows with
N RF carriers
RF power on
RF
Cell search
power on
Primary /
Cell search
secondary
Cell search
Primary / bands
secondary
Primary
/ identification
bands
secondary
identification
bands
identification System
information
Systemacquisition
information
System
acquisition
information
acquisition
Cell/band
selection
Cell/band
selection
Cell/band
selection
Network entry
Network entry
Network entryMulti-carrier
capability
Multi-carrier
negotiation
Multi-carrier
capability
capability
negotiation
negotiation
Normal operations
Data
Normal operations
transmission
Normal operations
Data
transmission
Data
transmission EMBS
EMBS
Fast network
entry
FastFast
network
network
entryentry
Scanning
EMBS
Scanning
Scanning
MS
System On
RF#1
RF
power on
Enable
supplementary
RF
Multi-carrier assisted operations
Cell search
Network entry
Primary bands
identification
Multi-carrier
capability
negotiation
RF power off
RF
power off
Normal operations
Data
transmission
Scanning
Handover
decision
System
information
acquisition
Fast network
entry
EMBS
Multicarrier
management
Cell/band
selection
Idle
RF
power off
Disable
supplementary
RF
9
MS
System off
Text Proposal
19.1 Multicarrier System Overview
With the support of multiple RF carriers, the overall state of a 16m MS is determined by the current behavior of each
individual RF carrier, which will be the combination of all its RF carrier states. The system operation flow of a MS
with N RF carriers (labeled as RF#1 to RF#N) is illustrated in Figure xx. The numbering of the RF carriers may be
mapped to the physical RF carriers in an arbitrary order depending on the system configuration. The system flows
are described as follows.
After the MS is powered on, its primary carrier (RF#1) is initialized first. The MS performs cell search via RF#1 to
locate the cell and band it wishes to join. The cell search procedures include primary bands identification, system
information acquisition, cell selection, and band selection. The BS may broadcast the information of its primary
bands and other alternative bands for the MS to expedite its synchronization process.
Once the target BS (and band) has been decided, the MS performs network entry procedures to establish basic
connections with the target BS. During the network entry, the MS and BS negotiate their multi-carrier capabilities as
a reference for further scheduling. After network entry procedures are done, the target BS becomes the serving BS of
the MS, and the MS starts its normal operations.
The MS may perform its normal operations, such as data transmission, scanning, handover decision and EMBS,
using single RF carrier (RF#1). It may also enable additional RF carriers to assist its normal operations. The
initialization and network entry process of the supplementary RF carrier may be simplified with the assistance of
currently active carriers. The functionalities of the supplementary RF carrier (blocks with dash lines in Figure YY)
may be performed or skipped according to the requirement of its dedicated operations.
10
Text Proposal (cont.)
RF#N
RF#3
RF#2
RF power on
RF
Cell search
power on
Primary /
Cell search
secondary
Cell search
Primary / bands
secondary
Primary
/ identification
bands
secondary
identification
bands
identification System
information
Systemacquisition
information
System
acquisition
information
acquisition
Cell/band
selection
Cell/band
selection
Cell/band
selection
Network entry
Network entry
Network entryMulti-carrier
capability
Multi-carrier
negotiation
Multi-carrier
capability
capability
negotiation
negotiation
Normal operations
Data
Normal operations
transmission
Normal operations
Data
transmission
Data
transmission EMBS
EMBS
Fast network
entry
FastFast
network
network
entryentry
Scanning
EMBS
Scanning
Scanning
MS
System On
RF#1
RF
power on
Enable
supplementary
RF
Multi-carrier assisted operations
Cell search
Network entry
Primary bands
identification
Multi-carrier
capability
negotiation
Data
transmission
Scanning
System
information
acquisition
Fast network
entry
EMBS
Handover
decision
RF power off
RF
power off
Normal operations
Cell/band
selection
Idle
RF
power off
Disable
supplementary
RF
MS
System off
Figure xx. MS operation flow with multiple RF carriers
11