Proposal for IEEE 802 16 m System Architecture

Proposal for IEEE 802. 16 m System Architecture and Protocol Structure Document Number: C 80216 m-07_282 Date Submitted: November 12, 2007 Source: Sassan Ahmadi (sassan. ahmadi@intel. com) Papathanassiou, Apostolos; Choi, Yang-seok; Yin, Hujun; Venkatachalam, Muthaiah; Ho, Minnie; Vannithamby, Rath; Sydir, Jerry; Riess, Eilon; Lomnitz, Yuval; Talwar, Shilpa; Wu, May; Etemad, Kamran; Puthenkulam, Jose P; Johnston, DJ Intel Corporation Venue: Atlanta, GA Base Contribution: C 80216 -07_282 Purpose: For discussion and approval by IEEE 802. 16 Working Group 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. Release: 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 contribution; and at the IEEE’s sole discretion to permit others to reproduce in whole or in part the resulting IEEE Standards publication. The contributor also acknowledges and accepts that this contribution may be made public by IEEE 802. 16. Patent Policy: The contributor is familiar with the IEEE-SA Patent Policy and Procedures: <http: //standards. ieee. org/guides/bylaws/sect 6 -7. html#6> and <http: //standards. ieee. org/guides/opman/sect 6. html#6. 3>. Further information is located at <http: //standards. ieee. org/board/pat-material. html> and <http: //standards. ieee. org/board/pat >. 1

Outline • • Salient Features of the Proposed Architecture Overall Network Architecture Reference Model Functional Split between IEEE 802. 16 m and the Access Network System State Diagram Air-Interface Protocol Stack Data Plane and Control Plane Protocol Stacks Functional Block Diagram of Unified Open-loop/Closed-loop SU/MUMIMO • Interference Mitigation Functional Partition • Multi-Radio Coexistence-Aware System Architecture • Backup – Definition of Protocol Layers 2

Ultimate Goals: Organization, Efficiency, Simplicity, Extensibility, Distinction, Performance 3

Salient Features of the Proposed Architecture • • • Maintain backward compatibility with the 802. 16 e Reference System through maximal reuse of existing functional components/protocols and at the same time using new features where necessary to achieve the performance targets. Multi-radio coexistence-aware system architecture which allows efficient coordination of collocated radio access technologies on the user device. Relay-enabled architecture with unified access and relay links for optimal two-hop operation. Different multi-carrier deployment options including support of contiguous and non-contiguous RF bands with single MAC instantiation. Flexibility for future enhancements and extensions Data and control plane protocols are specified separately. Unified support of FDD, TDD, and H-FDD duplex mode with common baseband processing Unified single-user and multi-user MIMO structure (single stream and/or multi-stream processing) for support of advanced multi-antenna techniques. Provisions for data-plane and control-plane ciphering protocols. Structured layer 2 functionalities where MAC common part sub-layer is extended and split into two functional groups (alternatively MAC CPS functions are softly classified into two categories). 4

Overall Network Architecture (informative) R 2 (logical interface) R 1 Access Service Network Gateway R 6 802. 16 e MS BS R 8 802. 16 m MS R 1’ BS Home Network Service Provider Visited Network Service Provider R 6 R 3 Connectivity Service Network R 5 Connectivity Service Network Access Service Network Layer 1 and Layer 2 to be specified by IEEE 802. 16 m R 4 Access Service Provider Network (Internet) Other Access Service Networks 5

IEEE 802. 16 e-2005 Reference Model CS SAP Service Specific Convergence Sub-Layer (CS) Management Entity Service Specific Convergence Sub-Layer MAC SAP MAC Common Part Sub-Layer (MAC CPS) Management Layer MAC Common Part Sub-Layer Security Sub-Layer RAN Control and Transport Functions External Networks PHY SAP Physical Layer (PHY) Management Entity Physical Layer 802. 16 e-2005 Data/Control Plane IEEE 802. 16 f/g Net. MAN Management Plane Wi. MAX NWG RAN Architecture 6

IEEE 802. 16 m Reference Model CS SAP Radio Resource Control and Management Functions Management Entity Service Specific Convergence Sub-Layer MAC SAP Management Layer Common Part Sub-Layer RAN Control and Transport Functions External Networks Medium Access Control Functions Security Sub-Layer Wi. MAX NWG RAN Architecture PHY SAP Physical Layer (PHY) Management Entity Physical Layer IEEE 802. 16 m Data/Control Plane IEEE 802. 16 f/g Net. MAN Management Plane MAC Common-Part Sub-Layer 7

Functional Split between IEEE 802. 16 m and the Access Network (informative) To be Specified by Wi. MAX Forum Network Architecture BS ASN-GW Paging Agent DHCP Proxy/Relay Authentication Function AAA Client/Authenticator Context Function Service Flow Management Functions Service Flow Anchor Key Receiver Key Distributor Handover Function R 6 Interface Data Path Function Handover Function Data Path Function MIP FA Radio Resource Control & Management Functions CS RRM Relay Paging Controller/Location Register Medium Access Control Functions Proxy MIP Client PHY To be Specified by IEEE 802. 16 m 8

IEEE 802. 16 e System State Diagram Power ON/OFF Initialization State Scanning and DL Synchronization (Preamble Detection) DL MAP (Common Control Channel) Acquisition Broadcast Channel Acquisition (DCD/UCD) MS Authentication, Authorization & Key Exchange (PKMv 2/ EAP) Registration with Serving BS (REG-REQ/RSP) Idle State MAC CIDs Establishme nt (DSAREQ/RSP) Connected State Cell Selection Decision Active Mode IP Address Assignment (DHCP/MIP) Fast Network Reentry DL/UL Data Transmission with Serving BS Access State Ranging and UL Synchronization (RNG-REQ/RSP) Basic Capability Negotiation Handoff/ Network Re-entry Neighbor Scanning Sleep Mode (SBC-REQ/RSP) 9

IEEE 802. 16 m System State Diagram Power ON/OFF Initialization State Scanning and DL Synchronization (Preamble Detection) Broadcast Channel Acquisition (DCD/UCD) Cell Selection Decision DL MAP Acquisition MS Authentication, Authorization & Key Exchange (PKMv 2/ EAP) Registration with Serving BS (REG-REQ/RSP) Idle State MAC CIDs Establishme nt (DSAREQ/RSP) Connected State Active Mode IP Address Assignment (DHCP/MIP) Fast Network Reentry DL/UL Data Transmission with Serving BS Access State Ranging and UL Synchronization (RNG-REQ/RSP) Basic Capability Negotiation Handoff/ Network Re-entry Neighbor Scanning Sleep Mode (SBC-REQ/RSP) 10

IEEE 802. 16 m Air-Interface Protocol Stack Classification of Layer 2 Functions Across Data and Control Planes Control Plane Data Plane Radio Resource Management Network Entry Management Routing Multi-Carrier Support Radio Resource Idle Mode Management Control & Management Location Management MBS Functions Mobility Management Self-Organization Convergence Sub-Layer Security Management System Configuration Management L 2 Qo. S Data Forwarding Data and Control Bearers Multi-Radio Coexistence. Sleep Mode Management Control and Signaling Scheduling & Resource Multiplexing Link Adaptation ARQ Fragmentation/Packing PHY Control Ranging CS SAP Interference Management MAC PDU Formation Medium Access Control Functions Security Sub-Layer Physical Channels L 1 PHY Protocol (FEC Coding, Signal Mapping, Modulation, MIMO processing, etc. ) Physical Layer MAC Common Part Sub-Layer 11

Protocol Structure for Multi-carrier Support Data Plane Control Plane CS SAP Radio Resource Control & Management Functions CS Sub-Layer Data and Control Bearers Medium Access Control Functions L 2 Security Sub-Layer Dynamic/Static Mapping MAC Common Part Sub-Layer Physical Channels PHY 1 RF Carrier 1 PHY 2 RF Carrier 2 … Physical Channels PHY n RF Carrier n L 1 12

Multi-carrier Support (Base Station and Mobile Station) Dynamic/Static Mapping (Example) * The device capabilities for multi-carrier support may vary and shall be specified through definition of various device classes. 13

IEEE 802. 16 m Data Plane Protocol Stack BS MAC CPS MS CS CS RS Medium Access Control Functions Security* Security PHY PHY IEEE 802. 16 m Air-Interface IEEE 802. 16 m Air. Interface * Security functions may be limited in certain nodes of the network that are outside of direct control of the operator (also known as security zone) 14

IEEE 802. 16 m Control Plane Protocol Stack MAC CPS MS BS RS Radio Resource Control & Management Functions Medium Access Control Functions Security* Security PHY PHY IEEE 802. 16 m Air-Interface Certain Management Functions messages may be ciphered 15

Functional Block Diagram of Unified OL/CL SU/MUMIMO 16

Interference Mitigation Functional Partition Radio Resource Control & Management Functions Interference-aware BS Coordination FFR (semi-static) Medium Access Control Function s FFR (dynamic) Interference. Aware Scheduling Uplink Power Control Interference Randomization PHY TX Beamforming RX Interference Mitigation 17

Functional Block Diagram for Interference Mitigation 18

Multi-Radio Coexistence-Aware System Architecture Radio x Coexistence Control Logic (Proprietary) Coexistence Information Service Arbitrator Activity Grant Request Inter-Radio Interface Coordination / Negotiation Coexistence Control 802. 16 m Radio Activity Notification Collocated Interference Report Coexistence-Aware Air Interface To be specified in the 802. 16 m Standard 19

Definition of Protocol Layers • • Physical Layer – A set of functions/protocols for encoding/decoding, modulation/demodulation, MIMO processing, …, and transmission/reception of traffic and control signals. Security Sub-Layer – A set of L 2 functions/protocols for encryption/decryption and authentication of user MSDUs. Medium Access Control Functions – A subset of E-MAC CPS comprising functions/protocols such as measurement, link adaptation, scheduling, error control , ranging, Qo. S, flow control, airlink management, etc. Resource Control and Management Functions – A subset of E-MAC CPS comprising radio resource control and management functions and protocols such as mobility management, load control, admission control, radio resource management, etc. Convergence Sub-Layer – A set of data plane protocols that interface E-MAC CPS with layer 3 protocols. These functions include robust header compression, traffic classification, etc. Data Plane – These are the protocols implementing the actual data bearer service, i. e. carrying user data through the access stratum. Control Plane – These are the protocols for controlling the data bearers and the connection between the MS and the network from different aspects (including requesting the service, controlling different transmission resources, handover etc. ). 20