IEEE 802.16m

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IEEE 802.16m Air Interface for Fixed and Mobile
Broadband Wireless Access Systems Advanced Air
Interface
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EECS 766Resource Sharing for Broadband Access
Networks

• IEEE 802.16m
• Air Interface for Fixed and Mobile Broadband
  Wireless Access Systems-Advanced Air interface
• Sukeerthi Bokka
• KUID 2331058
• April 10, 2008

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Abstract

• IEEE 802.16m a 4G wireless technology, an
  amendment to Mobile WiMAX is expected to ensure
  competitiveness of the evolved air interface with
  respect to other broadband radio access
  technologies as well as ensure support and
  satisfactory performance for emerging advanced
  services and applications requiring high
  bitrates, QoS, Bandwidths ensuring Spectrum
  efficiency and high mobility. This makes use of
  state of art adaptive modulation and coding
  techniques, cell sectorization, frequency reuse,
  advanced air interface antenna technology etc.
  The MAC and Physical Layers are to provide legacy
  support to 802.16e. The following gives an
  overview of the standardization and deployment
  scenarios of 802.16m.

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Outline

• History and Background
• Motivation
• Overview and key features of 802.16m
• Network Architecture
• QoS Requirements
• General
• Functional
• Performance
• Operational
• Physical Layer MAC Overview
• General Frame Structure
• Protocol Architecture
• Access Methods System Level Simulation
  Requirements
• Applications and Services
• Constraints
• Summary
• References

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History and Background

• The standard called 802.16 was developed by
  the IEEE 802.16 Task Group d in 2004.

Amendment Year Title Status
802.16e 2005 Mobile WiMAX Active
802.16m Dec 6, 2006 ( proposal approved) Air Interface for Fixed and Mobile Broadband Wireless Access Systems-Advanced Air interface Pre-Draft Stage
802.16f 2005 Management Information Base Active
802.16g 2007 Management Plane Procedures and Services Active
802.16k 2007 Bridging of 802.16 (an amendment to 802.1D) Active
802.16h - - Improved Coexistence Mechanisms for License-Exempt Operation Under Development
802.16i - - Mobile Management Information Base Under Development
802.16j - - Multihop Relay Specification Under Development
802.16Rev2 - - Consolidate 802.16-2004, 802.16e, 802.16f, 802.16g and possibly 802.16i into a new document Under Development
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Motivation

• TITLE IEEE 802.16m IEEE standard for Local and
  Metropolitan area networks-part 16 Air Interface
  for fixed and Mobile Broadband Wireless Access
  Systems-Advanced Air Interface.
• SCOPE To provide an advanced Air Interface for
  operation in licensed bands according to cellular
  Layer requirements of IMT-Advanced Next
  Generation Mobile Networks.
• PURPOSE To provide performance improvements
  necessary to support future advanced services and
  applications (ITU Standards).
• NEED FOR THE PROJECT Develop an advanced IEEE
  802.16 air interface standard by working
  cooperatively with ITU-R and its members.

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Features of IEEE 802.16m

• Advanced Air Interface
• Advanced Antenna Techniques
• Cell Sectorization
• Adaptive Frequency Reuse
• Adaptive Modulation Techniques

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General Requirements

• Meet the IMT-Advanced performance Requirements.
• System Requirements for systems comprising of all
  new MSs and BSs.
• Minimize complexity and number of options.
• Operating Frequencies less than 6GHz.
• Operating bandwidths 5-20MHz and more.
• Duplex Schemes TDD and FDD, HFDD.
• Both unpaired and paired Frequency Allocations
• UL/DL Ratio should be configurable in both TDD
  and FDD.
• Downlink-only configurations on a given carrier.
• Advanced Antenna Techniques
• Minimum 2 Transmit and 2 Receive for BS
• Minimum 1 Transmit and 2 Receive for MS
• Support for Government, Military, Public and
  Emergency Services.
• such as call prioritization, pre-emption,
  push-to-talk

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Functional Requirements

• Peak Data Rate
• Downlink (BS to MS) gt 6.5bps/Hz
• Uplink (MS to BS) gt 2.8bps/Hz
• 20MHz gt 130Mbps
• Latency Lower than 802.16e in all cases.
• Data Latency Downlink 10 ms max and Uplink 10 ms
  max.
• State Transition Latency idle to activelt100ms .
• Max Handover Interruption time Intra Frequency
  60 ms and Inter Frequency 150 ms.
• QoS Maintained when switching between RATs
  (Radio Access Terminal).
• Service continuity during handover .
• Enhanced Multicast Broadcast service.
• Optimized Switching.
• High Resolution Location Determination.

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Performance Requirements

• 2x user throughput related to 802.16e.
• 2x sector throughput (bps/Hz/Sector) in DL and
  1.5x in UL.
• 1.5x VOIP Capacity.
• Mobility Optimized for 0-15 Kmph, Marginal
  degradation 15-120 Kmph, maintain connectivity at
  120-350 Kmph.
• 3dB improvement in link budget over 802.16e.
• Cell Coverage Optimized for cell sizes upto 5
  Km. Graceful degradation in spectral efficiency
  in 5-30 Km. Functional for 30-100 Km.
• E-BMS Services with 4bps/Hz for inter-site
  distance of 0.5 Km, 2bps/Hz for 1.5 Km.
• Both mixed unicast/multicast and dedicated BMS
  carriers.

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Operational Requirements

• Provide Legacy Support to IEEE802.16e
• Operate in Legacy 802.16e spectrum
• Operate in other legacy RAT spectrums
• Co-deployment with other networks
• 802.16m is anticipated to be deployed in the
  same RF bands as the legacy networks.
• Co-deployable is same or overlapping
  geographical areas with RATs.
• 802.16m should provide enhancements to enable
  multi-hop relays
• Synchronize frame timing and frame counters with
  BSs of the same technology neighboring systems

SourceIEEE 802.16m Update Raj Jain,
Washington University, http//www.cse.wustl.edu/j
ain/wimax/16m0706.htm6
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IEEE 802.16m Protocol Structure

• IEEE 80216m-08_003 The Draft IEEE
  802.16m Systems Description Document, Jan. 2008
  1.5

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General Frame Structure

• FRAME

IEEE C802.16m-08/228r1Frame Structure to
Support Multiple CP Sizes with Fixed Sub-frame
Size ,Yungsoo Kim, Jumi Lee, Yu-Seok Kim,
Samsung Electronics Co., LTD1.4
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Downlink Subframe Structure
IEEE Standard 802.16 A Technical Overview of
the WirelessMAN Air Interface for Broadband
Wireless Access,Carl Eklund, Roger B. Marks,
Kenneth L. Stanwood Stanley Wang 2005 1.1
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Uplink Subframe Structure
IEEE Standard 802.16 A Technical Overview of
the WirelessMAN Air Interface for Broadband
Wireless Access,Carl Eklund, Roger B. Marks,
Kenneth L. Stanwood Stanley Wang 2005 1.1
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MAC Frame Format
IEEE Standard 802.16 A technical Overview of
the WirelessMAN Air Interface for Broadband
Wireless Access,Carl Eklund, Roger B. Marks,
Kenneth L. Stanwood Stanley Wang 2005 1.1
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Network Architecture
Overall Network Architecture
IEEE 80216m-08_003 The
Draft IEEE 802.16m Systems Description Document,
Jan. 2008 1.5
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Network Architecture
Relay Station in Overall Network Architecture
IEEE 80216m-08_003 The Draft IEEE
802.16m Systems Description Document, Jan. 2008
1.5
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Proposed Network Architecture

• Propose network structure based on multi cell
  coordinated relay

IEEE C80216m-08_029r2 A novel network
structure based on multi cell coordinated relay,
Jan. 2008 1.7
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Network Structure

• Network structure based on multi cell coordinated
  relay for 802.16m
• an illustration of
• transmission
• scheme

IEEE C80216m-08_029r2 A novel network
structure based on multi cell coordinated relay,
Jan. 2008 1.7
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System Level Simulation Assumptions
Topic Description Baseline Simulation Assumptions Proposal Specific Assumptions (To be provided by Proponent )
Basic modulation Modulation schemes for data and control QPSK, 16QAM, 64QAM
Duplexing scheme TDD, HD-FDD or FD-FDD TDD
Subchannelization Subcarrier permutation PUSC
Resource Allocation Granularity Smallest unit of resource allocation PUSC Non- 1 slot, 2 slots (1 slot 1 subchannel x 2 OFDMA symbols)
Downlink Pilot Structure Pilot structure, density etc. Specific to PUSC subchannelization scheme
Multi-antenna Transmission Format Multi-antenna configuration and transmission scheme MIMO 2x2 (Adaptive MIMO Switching Matrix A Matrix B) Beamforming (2x2)
Receiver Structure MMSE/ML/MRC/ Interference Cancellation MMSE (Matrix B data zone) MRC (, Matrix A data zone)
Data Channel Coding Channel coding schemes Convolutional Turbo Coding ()
IEEE 80216m-08_004r1 The IEEE 802.16m
Evaluation Methodology Document, Mar 2008 1.6
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System Level Simulation Assumptions
Control Channel Coding Channel coding schemes and block sizes Convolutional Turbo Coding (CTC), Convolutional Coding (CC) for FCH only
Scheduling Demonstrate performance / fairness criteria in accordance to traffic mix Proportional fairness for full buffer data only
Link Adaptation Modulation and Coding Schemes (MCS), CQI, feedback delay / error QPSK(1/2) with repetition,1/2/4/6, QPSK(3/4),16QAM(1/2), 16QAM(3/4), 64QAM(1/2), 64QAM(2/3),64QAM(3/4) 64QAM(5/6),CQI feedback delay of 3 frames, error free CQI feedback
HARQ Chase combining/incremental redundancy, synchronous/ asynchronous, adaptive/non-adaptive ACK/NACK delay, Maximum number of retransmissions, retransmission delay Chase combining asynchronous, non-adaptive,1 frame ACK/NACK delay, ACK/NACK error, maximum 4 HARQ retransmissions, minimum retransmission delay 2 frames
Power Control Subcarrier power allocation Equal power per subcarrier
Frequency Reuse Frequency reuse pattern 3 Sectors with frequency reuse of 1
IEEE 80216m-08_004r1 The IEEE 802.16m
Evaluation Methodology Document, Mar 2008 1.6
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OFDMA Specifications

IEEE 80216m-08_004r1 The IEEE 802.16m
Evaluation Methodology Document, Mar 2008 1.6
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OFDMA Specifications
IEEE 80216m-08_004r1 The IEEE 802.16m
Evaluation Methodology Document, Mar 2008 1.6
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Services and Applications

• Voice Services
• VOIP, Digital Telephony
• Data Services
• Email, IMS, Web browsing, File Transfer,
  Internet Gaming
• Multimedia Services
• Near Real Time Audio/Video Streaming,
  Broadcast, Interactive conferencing, Digital
  Video Telephony
• Personal and Enterprise Use
• Mobile Internet, VPN, Backhaul

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Constraints

• It has poor backhaul capability. 802.16m is
  mobile broadband and as such has much more
  substantial backhaul need. Therefore traditional
  backhaul solutions are not appropriate.
  Consequently the role of very high capacity
  wireless microwave point-to-point backhaul (200
  or more MBps with typically 1ms or less delay) is
  on the rise. Also fiber backhaul may be
  considered as an alternative.
• Other Constraints Design Constraints, Power
  Management, fading, interference management,
  security

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Summary

• In summary, the IEEE802.16m Air Interface for
  Fixed and Mobile Broadband Wireless Access
  Systems
• Advanced Air Interface provides for the
  following services while keeping in consideration
  
• legacy support with 802.16e.
• Higher peak user rates and aggregate throughput (
  up to 100 Mbits/sec)
• Increased user and service penetration rates,
  improve link quality and range
• Greater ability to simultaneously support a wide
  range of multimedia services
• Management of different QoS requirements
• Improve support of high levels of mobility, while
  maintaining high spectral efficiency and link
  rates
• This is achieved by exploiting the state of art
  technology trends like
• System related technologies ( packet network
  architecture, platform technologies etc.)
• Access network and radio interface ( multiple
  access schemes, adaptive radio interfaces,
  antenna technologies etc)
• Utilization of spectrum (hierarchical cell
  structure, adaptive antenna systems MIMO,
  spectrum reuse etc)

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References

• http//wirelessman.org/tgm/ 1.0
• IEEE Standard 802.16 A Technical Overview of
  the WirelessMAN Air Interface for Broadband
  Wireless Access,Carl Eklund, Roger B. Marks,
  Kenneth L. Stanwood Stanley Wang 2005 1.1
• IEEE C802.16m- 07/203r1 Adaptive Frequency
  Reuse in IEEE 802.16m System ,I-Kang Fu, Pei-Kai
  Liao and Paul Cheng MediaTek Inc 2007 1.2
• IEEE C802.16m- 08/200r2 DL/UL Resource
  Allocation for Improved Intra System Coexistance
  ,Ranga Reddy- 2008 1.3
• IEEE C802.16m-08/228r1Frame Structure to
  Support Multiple CP Sizes with Fixed Sub-frame
  Size ,Yungsoo Kim, Jumi Lee, Yu-Seok Kim,
  Samsung Electronics Co., LTD1.4
• IEEE 80216m-08_003 The Draft IEEE 802.16m
  Systems Description Document, Jan. 2008 1.5
• IEEE 80216m-08_004r1 The IEEE 802.16m
  Evaluation Methodology Document, Mar 2008 1.6
• IEEE C80216m-08_029r2 A novel network structure
  based on multi cell coordinated relay, Jan. 2008
  1.7
• IEEE C802.16m- 08/200r1Draft IEEE 802.16m
  requirements , Mark Cudak (Motorola) 2007 1.8
• WiMAX Forum White Papers Deployment of Mobile
  WiMAX Networks with 3G and WiMAX in IMT-2000,
  Mar. 2008
• http//www.wimaxforum.org/technology/downloads/
  2

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References

• IEEE 802.16 Published Standards and Drafts, Mar.
  2008
• http//www.ieee802.org/16/published.html 3
• CTIA WiMAX takes its place in the mobile
  broadband patchwork, April 2008
• http//www.wimaxtrends.com/2008/04/ctia-wimax-ta
  kes-its-place-in.html4
• IEEE802.16m-07 002.pdf , 2007
• http//ieee802.org/16/tgm/docs/80216m-07_002.pdf
  5
• IEEE 802.16m Update Raj Jain, Washington
  University
• http//www.cse.wustl.edu/jain/wimax/16m0706.htm
  6
• Frank Ohrtman ,Wi MAX Handbook Building 802.16
  Wireless Networks, McGrawHill2005 7
• Clint Smith, John Meyer 3G Wireless with WiMAX
  and Wi-Fi, McGraw-Hill 2005 8
• Syed Ahson, Mohammad Ilyas, WiMax Applications,
  Standards Security, Technologies Performance
  Analysis and QoS , Taylor Francis CRC Press
  2008 10

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Frequency Reuse
IEEE C802.16m- 08/200r1Draft IEEE 802.16m
requirements , Mark Cudak (Motorola) 2007 1.8
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Adaptive Frequency Reuse
IEEE C802.16m- 07/203r1 Adaptive Frequency
Reuse in IEEE 802.16m System ,I-Kang Fu, Pei-Kai
Liao and Paul Cheng MediaTek Inc 2007 1.2
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