IEEE C802.16m-08_157
Project
Title
Date
Submitted
IEEE 802.16 Broadband Wireless Access Working Group <http://ieee802.org/16>
Updated Proposal for IEEE 802.16m Air-Interface Protocol Structure
March 10, 2008
Baowei Ji, Changhoi Koo
Source(s)
Re:
Abstract
Purpose
Notice
Release
Patent
Policy
bji@sta.samsung.com, chkoo@samsung.com
Samsung Telecommunication America
Jungje Son, Sungjin Lee, Hyunjeong Kang, Samsung Electronics
Jaehyuk Jang
Rakesh Taori
Samsung Advanced Institute of Technology
Call for Contributions on Project 802.16m System Description Document (SDD)
Topic: The content of Sections 4, 5, and 8 of IEEE 802.16m-08/003
Description of the Proposal for IEEE 802.16m Air-Interface Protocol Structure
For discussion and approval by IEEE 802.16 Working Group
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.
The contributor grants a free, irrevocable license to the IEEE to incorporate material contained in
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Further information is located at <http://standards.ieee.org/board/pat/pat-material.html> and
<http://standards.ieee.org/board/pat>.
1
IEEE C802.16m-08_157
Updated Proposal for IEEE 802.16m Air-Interface Protocol Structure
1 Introduction
This contribution provides an updated proposal for IEEE 802.16m air-interface protocol
structure. We propose the following changes to Section 8 of IEEE 802.16m/003, together with
the rationale.
(a)
Split and present the protocol structure for BS and MS respectively. MS does not
have all the functional blocks as BS does. To present them individually leads to more
clear and concrete specification. Based on the description in [1], the following functional
blocks do not apply for MS: System Configuration Management, MBS, Routing,
Interference Management, and Control Signaling.
(b)
Redefine Connection Management block as Service Flow and Connection
Management block. The Connection Management block in [1] did not cover the setup,
teardown and mapping of service flows.
(c)
Add Scanning Management block to lower MAC. Scanning and Sleeping are two
modes defined in the connected state. It would be straightforward to list them peer to peer.
(d)
Move several functional blocks from lower MAC to upper MAC. As presented in
references [2, 3, and 4], the reason for separating MAC Common Part Sublayer (CPS)
into lower and upper MAC is for facilitating logical description and implementation
flexibility. One reasonable way for deciding which block belongs to what layer would be
that a functional block in lower MAC could be handled by the MAC completely without
interacting with outside entity, whereas a functional block in upper MAC has to interact
with other entities in the core network or entities of different systems. For example, the
procedures and details of Sleep Mode operation is handled by the MAC of a BS
completely. Therefore, it is reasonable to put Sleep Management mode in lower MAC as
done in [1]. On the contrary, BS needs to interact with Paging Controller in order to fulfill
all the functions of Idle Mode operation. Hence, it is reasonable to put Idle Mode
Management in upper MAC, again as done in [1]. For the same rationale, we propose to
move the following functional blocks to upper MAC.
(d.1) Multi-Radio Coexistence block. The issue addressed in Multi-Radio
Coexistence block is more than multi-mode terminal which is more or less an
implementation issue. BS might interact with other systems (e.g., WiFi AP)
and/or third-party service center in order to addressing inter-system coexistence
more effectively as IEEE 802.16m is targeting at.
(d.2) Interference Management block. Most likely, this block requires a BS to
interact with its neighbor cells or a certain entity in the core network to address
the inter-BS interference issues.
(d.3) Redefine Data Forwarding block as Relay Management block and move it to
upper MAC. Data forwarding is one option for RS design at this moment. Before
the joint Ad Hoc 802.16j/m group works out the clear scope of RS, we had better
to use a more general term (i.e., Relay Management) and place it in upper MAC.
(e)
Remove Routing block. Routing is not well defined in 802.16m scope. Its basic
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IEEE C802.16m-08_157
functionality might be covered in Relay Management blocks newly added.
2 Proposed Text for SDD
Replace Section 8 with the following.
------------------------------- Text Start ---------------------------------------------------
8
IEEE 802.16m Air-Interface Protocol Structure
8.1 IEEE 802.16m Protocol Structure
Figures X.a and X.b show the protocol architecture of IEEE 802.16m for BS and MS respectively.
For convenience, clarity and implementation flexibility, the MAC CPS functions are classified
into two groups based on their characteristics. The upper one is named as resource control and
management functions group, and the lower one is named as medium access control functions.
The control plane functions and data plane functions are also separately classified.
The resource control and management functional group includes the following functional blocks
that are related with radio resource functions:
1. Existing functional blocks in IEEE802.16e systems
- Radio Resource Management
- Mobility Management
- Network-entry Management
- Location Management
- Idle Mode Management
- Security Management
- System Configuration Management
- MBS
- Service Flow and Connection Management
2. Additional functional blocks for IEEE802.16m systems
- Self Organization
- - Multi-Carrier Support
- Multi-Radio Coexistence
- Relay Management
- Interference Management
Following the protocol architecture of IEEE 802.16e, IEEE 802.16m adds five more functional
blocks. (Notes: Besides the following, detailed description of those blocks will be added based
on further discussion in IEEE 802.16m.)
Self Organization block performs functions to support self configuration and self optimization
mechanisms. The functions include procedures to request MSs to report measurements for self
configuration and self optimization and receive the measurements report from the MSs.
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IEEE C802.16m-08_157
Relay Management block performs function to support relay system. (Notes : the detail will be
specified based on the discussion in 16jm Ad Hoc)
Network Layer
Radio Resource
Management
Location
Management
System
Configuration
Management
Multi-Carrier
Support
Mobility
Management
Idle Mode
Management
MBS
Self-Organization
Network-entry
Management
Security
Management
Service Flow and
Connection
Management
Multi-Radio
Coexistence
Interference
Management
Relay
Management
Convergence Sublayer
MAC Common Part Sublayer
Scanning Mode
Management
Sleep Mode
Management
QoS
ARQ
Scheduling and
Resource
Multiplexing
Fragmentation/Packing
MAC PDU formation
PHY control
Ranging
Link Adaptation
(CQI, HARQ, power
control)
Control
Signaling
Encryption
Data Plane
Control Plane
Physical Layer
Figure X.a The IEEE 802.16m protocol architecture (BS)
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IEEE C802.16m-08_157
Network Layer
Radio Resource
Management
Location
Management
Multi-Carrier
Support
Mobility
Management
Idle Mode
Management
Self-Organization
Network-entry
Management
Security
Management
Convergence Sublayer
Service Flow and
Connection
Management
Multi-Radio
Coexistence
MAC Common Part Sublayer
Scanning Mode
Management
Sleep Mode
Management
QoS
ARQ
Scheduling and
Resource
Multiplexing
Fragmentation/Packing
MAC PDU formation
PHY control
Ranging
Link Adaptation
(CQI, HARQ, power
control)
Encryption
Data Plane
Control Plane
Physical Layer
Figure X.b The IEEE 802.16m protocol architecture (MS)
8.1.1 IEEE 802.16m MS/BS Data Plane Processing Flow
Figures Y.a and Y.b show the user data traffic flow and processing procedures at the BS and MS
in the IEEE802.16m systems. On the transmitter side, when a data packet is passed by the
network layer process to the convergence sublayer, the convergence sublayer classifies a data
packet (MAC Service Data Unit) according to the classification rules and maps a MSDU onto the
specific transport connection. If ARQ is enabled for a MSDU, the MSDU may be partitioned into
the ARQ blocks. Fragmentation/Packing blocks may fragment a MSDU or pack multiple
MSDUs, and add subheader if necessary. A MSDU having subheader may be encrypted if prenegotiated. The MAC PDU Formation block adds generic MAC header and CRC if necessary on
a MSDU and then forms the MAC Protocol Data Unit (MPDU). Several MPDU may be
concatenated according to the size of the data burst to be transmitted in the physical layer.
On the receiver side, when a data packet is passed by the physical layer process to the MAC CPS,
MAC PDU Formation block extracts MPDU, and Fragmentation/Packing block
defragments/unpacks a MPDU to extract MSDU for the convergence sublayer. After
reconstituted in Convergence sublayer, MSDU is transferred to the Network layer.
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IEEE C802.16m-08_157
Network Layer
Radio Resource
Management
Location
Management
System
Configuration
Management
Multi-Carrier
Support
Mobility
Management
Idle Mode
Management
MBS
Self-Organization
Network-entry
Management
Security
Management
Service Flow and
Connection
Management
Multi-Radio
Coexistence
Interference
Management
Relay
Management
Convergence Sublayer
MAC Common Part Sublayer
Scanning Mode
Management
Sleep Mode
Management
QoS
ARQ
Scheduling and
Resource
Multiplexing
Fragmentation/Packing
MAC PDU formation
PHY control
Ranging
Control
Signaling
Link Adaptation
(CQI, HARQ, power
control)
Control Plane
Encryption
Data Plane
Physical Layer
Figure Y.a The IEEE 802.16m data plane processing flow (BS)
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IEEE C802.16m-08_157
Network Layer
Radio Resource
Management
Location
Management
Multi-Carrier
Support
Mobility
Management
Idle Mode
Management
Self-Organization
Network-entry
Management
Security
Management
Convergence Sublayer
Service Flow and
Connection
Management
Multi-Radio
Coexistence
MAC Common Part Sublayer
Scanning Mode
Management
Sleep Mode
Management
QoS
ARQ
Scheduling and
Resource
Multiplexing
Fragmentation/Packing
MAC PDU formation
PHY control
Ranging
Encryption
Link Adaptation
(CQI, HARQ, power
control)
Control Plane
Data Plane
Physical Layer
Figure Y.b The IEEE 802.16m data plane processing flow (MS)
8.1.2 IEEE 802.16m MS/BS Control Plane Processing Flow
Figures Z.a and Z.b show the control plane signaling flow and processing procedures at the BS
and MS in the IEEE802.16m systems. Most of the MAC functional blocks generate their own
MAC management message and these MAC messages are transported to the
Fragmentaion/Packing block. Basically, ARQ block is not enabled for the MAC management
message transmission. Authentication information (e.g., CMAC/HMAC defined in 802.16e) may
be appended to the MAC management message if necessary. On the transmit side, some of MAC
management messages may be transmitted on control signaling block in the form of control
messages. On the receiver side, most of MAC functional blocks also receive and handle MAC
management messages from the MAC Formation block of the opposite side (MS to BS, BS to
MS).
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IEEE C802.16m-08_157
Network Layer
Radio Resource
Management
Location
Management
System
Configuration
Management
Multi-Carrier
Support
Mobility
Management
Idle Mode
Management
MBS
Self-Organization
Network-entry
Management
Security
Management
Service Flow and
Connection
Management
Multi-Radio
Coexistence
Interference
Management
Relay
Management
Convergence Sublayer
MAC Common Part Sublayer
Scanning Mode
Management
Sleep Mode
Management
QoS
ARQ
Scheduling and
Resource
Multiplexing
Fragmentation/Packing
MAC PDU formation
PHY control
Ranging
Control
Signaling
Link Adaptation
(CQI, HARQ, power
control)
Control Plane
Encryption
Data Plane
Physical Layer
Figure Z.a The IEEE 802.16m control plane processing flow (BS)
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IEEE C802.16m-08_157
Network Layer
Radio Resource
Management
Location
Management
Multi-Carrier
Support
Mobility
Management
Idle Mode
Management
Self-Organization
Network-entry
Management
Security
Management
Convergence Sublayer
Service Flow and
Connection
Management
Multi-Radio
Coexistence
MAC Common Part Sublayer
Scanning Mode
Management
Sleep Mode
Management
QoS
ARQ
Scheduling and
Resource
Multiplexing
Fragmentation/Packing
MAC PDU formation
PHY control
Ranging
Encryption
Link Adaptation
(CQI, HARQ, power
control)
Control Plane
Data Plane
Physical Layer
Figure Z.b The IEEE 802.16m control plane processing flow (MS)
------------------------------- Text End
---------------------------------------------------
References
[1]
[2]
[3]
[4]
IEEE 802.16m-08/003, The Draft IEEE 802.16m System Description Document
IEEE C802.16m-07/297r3, Updated Proposal for IEEE 802.16m System Architecture and
Protocol Structure
IEEE C802.16m-07/282r2, Updated Proposal for IEEE 802.16m System Architecture and
Protocol Structure
IEEE C802.16m-08/200r1, Logical Radio Protocol Architecture for IEEE 802.16m
9