1. Copyright 2005 WiMAX Forum “WiMAX Forum™” and "WiMAX Forum CERTIFIED™“ are registered trademarks of the WiMAX Forum™. * All trademarks are the properties of their respective owners. WiMAX Link Models Max Riegel 2006-09-12

2. Copyright 2005 WiMAX Forum “WiMAX Forum™” and "WiMAX Forum CERTIFIED™“ are registered trademarks of the WiMAX Forum™. * All trademarks are the properties of their respective owners. Tunneling IP packets through the WiMAX access network (IPv4 case) MS Internet CSN 3G MNO The 802.16 Convergence Sublayer (CS) provides tunneling over the air. –Tunnels are identified by the CID (Connection Identifier) –Assignment of CIDs is performed in the BS –Plain IP packets can be forwarded over CS GRE LNK PHY LNK GRE IP MAC PHY Micro Mobility Mgmt LNK IP LNK IP R1 R6R3 R5 ASN GW BS ASN CSN MAC CS MIP MIP Tunnel 802.16

3. Copyright 2005 WiMAX Forum “WiMAX Forum™” and "WiMAX Forum CERTIFIED™“ are registered trademarks of the WiMAX Forum™. * All trademarks are the properties of their respective owners. Convergence Sublayer IEEE802.16-2004: 5. Service specific CS The service specific CS resides on top of the MAC CPS and utilizes, via the MAC SAP, the services provided by the MAC CPS. The CS performs the following functions: –accepting higher layer protocol data units (PDUs) from the higher layer –performing classification of higher layer PDUs –processing (if required) the higher layer PDUs based on the classification –delivering CS PDUs to the appropriate MAC SAP –receiving CS PDUs from the peer entity 802.16e defines 11 different Convergence Sublayer types suitable for IP

4. Copyright 2005 WiMAX Forum “WiMAX Forum™” and "WiMAX Forum CERTIFIED™“ are registered trademarks of the WiMAX Forum™. * All trademarks are the properties of their respective owners. Classification & Encapsulation Packet-handling in the base station is done based on information in the packet header Classification based on header information Encapsulation and forwarding

5. Copyright 2005 WiMAX Forum “WiMAX Forum™” and "WiMAX Forum CERTIFIED™“ are registered trademarks of the WiMAX Forum™. * All trademarks are the properties of their respective owners. IEEE802.16e: CS Options

6. Copyright 2005 WiMAX Forum “WiMAX Forum™” and "WiMAX Forum CERTIFIED™“ are registered trademarks of the WiMAX Forum™. * All trademarks are the properties of their respective owners. Coexistence of CS Types in the IEEE 802.16 Standard Physical Layer, MAC Common Part Sublayer and Management/Control Plane are agnostic to user payload (CS type) Standard accommodates multiple instantiations of CS types Classification is specific to particular CS type –e.g. for IPoETH-CS, 14-18 bytes of additional header information must be parsed per packet.

7. Copyright 2005 WiMAX Forum “WiMAX Forum™” and "WiMAX Forum CERTIFIED™“ are registered trademarks of the WiMAX Forum™. * All trademarks are the properties of their respective owners. Header fields for classification IP on 802.16 –CID = function of : destination IP address source IP address type of service field destination port source port Ethernet on 802.16 –CID = function of : destination Ethernet address source Ethernet address Ethernet user priority field IP over Ethernet over 802.16 –CID = function of: {IP on 802.16} {Ethernet on 802.16}

8. Copyright 2005 WiMAX Forum “WiMAX Forum™” and "WiMAX Forum CERTIFIED™“ are registered trademarks of the WiMAX Forum™. * All trademarks are the properties of their respective owners. ASN Data Plane for IP-CS CS SAP Service Specific Convergence Sublayer (CS) MAC SAP MAC Common Part Sublayer (MAC CPS) Privacy Sublayer Physical Layer (PHY) PHY SAP MAC PHY IEEE802.16/802.16e Data/Control Plane PHS (opt.) Classifier CS SAP MAC SAP MAC Common Part Sublayer (MAC CPS) Privacy Sublayer Physical Layer (PHY) PHY SAP PHS (opt.) CID#1 Classifier CS SAP MAC SAP MAC Common Part Sublayer (MAC CPS) Privacy Sublayer Physical Layer (PHY) PHY SAP PHS (opt.) CID#3 Classifier CS SAP MAC SAP MAC Common Part Sublayer (MAC CPS) Privacy Sublayer Physical Layer (PHY) PHY SAP PHS (opt.) CID#5 Classifier CID#6CID#4CID#2 MS BS APPL Data Path Function GRE-Key#1 GRE-Key#2GRE-Key#3 R6 R1 Mapping & Filtering DHCP Server PMIP Client ASN GW R3 IP-Service IP service scenario illustrated for Release 1 type routed ASN

9. Copyright 2005 WiMAX Forum “WiMAX Forum™” and "WiMAX Forum CERTIFIED™“ are registered trademarks of the WiMAX Forum™. * All trademarks are the properties of their respective owners. GRE-Key#1 GRE-Key#2GRE-Key#3 ARP & ProxyARP ASN Data Plane for IPoETH/ETH-CS CS SAP Service Specific Convergence Sublayer (CS) MAC SAP MAC Common Part Sublayer (MAC CPS) Privacy Sublayer Physical Layer (PHY) PHY SAP MAC PHY IEEE802.16/802.16e Data/Control Plane PHS (opt.) Classifier CS SAP MAC SAP MAC Common Part Sublayer (MAC CPS) Privacy Sublayer Physical Layer (PHY) PHY SAP PHS (opt.) CID#1 Classifier CS SAP MAC SAP MAC Common Part Sublayer (MAC CPS) Privacy Sublayer Physical Layer (PHY) PHY SAP PHS (opt.) CID#3 Classifier CS SAP MAC SAP MAC Common Part Sublayer (MAC CPS) Privacy Sublayer Physical Layer (PHY) PHY SAP PHS (opt.) CID#5 Classifier CID#6CID#4CID#2 MS BS APPL Data Path Function R6 R1 Mapping & Filtering DHCP Relay PMIP Client ASN GW R3 Data Path Function ProxyARP IP-Service ETH-Service ProxyARP is applied to prevent wastage of radio resources due to ARP broadcasts. Coexistence IP & Ethernet service scenario Illustrated for Release 1 type routed ASN; Bridged ASN(R6) is for further study.

10. Copyright 2005 WiMAX Forum “WiMAX Forum™” and "WiMAX Forum CERTIFIED™“ are registered trademarks of the WiMAX Forum™. * All trademarks are the properties of their respective owners. CP and DP Protocol Layering for routed ASN transport MS ASN PHY CSN ASN-GW BS MAC LNK.16Ctrl IP PHY MAC LNK IP-CS IP GRE IP GRE IP ASNctrl CSNctrl Control IP*-CS Data Path R1R3R5 R6 PHY MAC LNK ETH-CS IP GRE IP GRE IP IP*oETH-CS Data Path ETH Example shows GRE tunneling can be used for all CS types. ASN transport (switched/routed) does not depend on CS PHY MAC LNK ETH ETH-CS IP GRE ETH ETH-CS Data Path

11. Copyright 2005 WiMAX Forum “WiMAX Forum™” and "WiMAX Forum CERTIFIED™“ are registered trademarks of the WiMAX Forum™. * All trademarks are the properties of their respective owners. ETH-CS link model The ASN shall support Bridging between all its R1 interfaces and the interfaces towards the network side. When performing Bridging, the ASN shall forward all packets received from any R1 to a network side port. –Peer-to-peer communication between MSs is not available by the Bridging in the ASN in Release 1.0 When performing Bridging, the ASN should flood any packet received from a network side port destined for a MAC broadcast or multicast address to all its R1 interfaces. –This flooding may be prevented by one of the filtering rules (e.g. for Proxy ARP). MS BS ProxyARP ASN GRE ASN-GW R1 Network side

12. Copyright 2005 WiMAX Forum “WiMAX Forum™” and "WiMAX Forum CERTIFIED™“ are registered trademarks of the WiMAX Forum™. * All trademarks are the properties of their respective owners. Link model for IPv6 support The link is modeled as a shared medium –All MSs are connected by P2P links to the AR –The MSs cannot communicate directly; all the traffic goes through the AR Emulation of shared link behavior by an Authoritative Address Cache and Relay DAD All the MSs attached to the same AR share the same IPv6 Prefix MS BS ASN GRE ASN-GW R1 Authoritative Addr Cache AR

13. Copyright 2005 WiMAX Forum “WiMAX Forum™” and "WiMAX Forum CERTIFIED™“ are registered trademarks of the WiMAX Forum™. * All trademarks are the properties of their respective owners. Extend Bridge with Relay DAD Procedure and Authoritative Address Cache. Pro: –Particularities of the link are solved in the link layer –Additional functions fit well to ‘Proxy ARP’ information structures Con: ? Authoritative Addr Cache IPv6oETH-CS Approach#2 MS BS ProxyARP ASN GRE ASN-GW R1 AR

14. Copyright 2005 WiMAX Forum “WiMAX Forum™” and "WiMAX Forum CERTIFIED™“ are registered trademarks of the WiMAX Forum™. * All trademarks are the properties of their respective owners. CP and DP Protocol Layering for switched ASN transport MS ASN PHY CSN ASN-GW BS MAC ETH LNK.16Ctrl IP PHY MAC LNK IP-CS IP ETH IP ETH IP ASNctrl CSNctrl Control IP*-CS Data Path R1R3R5 PHY MAC LNK ETH-CS IP IP*oETH-CS Data Path ETH PHY MAC ETH ETH-CS ETH ETH-CS Data Path