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Changes between Version 36 and Version 37 of Old/WiMAX/02


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Timestamp:
Dec 8, 2010, 10:07:08 PM (10 years ago)
Author:
hmussman
Comment:

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  • Old/WiMAX/02

    v36 v37  
    4343The data path is built to support pure layer 2 (L2) traffic to and from the Mobile Stations (MSs), even though WiMAX is inherently an IP (L3) service.
    4444
    45 For Cases 1 and 2, the Data Path Module carries UL and DL L2 flows between a GRE tunnel on the NEC BTS side, and a VLAN tag on the GENI Access Network side.
    46 For Case 3, the Data Path Module carries UL and DL L2 flows between a GRE tunnel on the NEC BTS side, and a VLAN tag on the KVM VM side.
     45 * For Cases 1 and 2, the Data Path Module carries UL and DL L2 flows between a GRE tunnel on the NEC BTS side, and a VLAN tag on the GENI Access Network side.
     46
     47 * For Case 3, the Data Path Module carries UL and DL L2 flows between a GRE tunnel on the NEC BTS side, and a VLAN tag on the KVM VM side.
    4748
    4849Currently, the only supported Data Path Module is the Click Modular Router
    49 Later, it is expected that an Open FLow Switch will be supported.
     50Later, it is expected that an Open Flow Switch will be supported.
    5051
    5152=== 4.3.1  Click Modular Router ===
     
    5354The currently supported Data Path Module is the Click Modular Router, v1.6;  later, this is planned to be replaced with v1.8.
    5455
    55 The functionality of the CLICK Modular Router is shown in Fig 4.
    56 
    57 It is based on a dynamically configurable L2 learning switch.
    58 
    59 Both UL and DL data paths are automatically created and installed when MSs associate.
     56The functionality of the CLICK Modular Router is shown in Fig 4.  It is based on a dynamically configurable L2 learning switch.
     57
     58Both UL and DL data paths are automatically created and installed when MSs associate.  Dataflows are:
     59
     60 * DL from GENI Access Network:  classifier, switch, tunnels
     61
     62 * UL from Clients: ARP lookup, switch, GENI Access Network
     63
     64 * DHCP allocations: learned by the parser, which populates entries in a ARP manager
     65
     66 * ARP Requests from GENI Access Network: handled by ARP manager
    6067
    6168Data paths are setup by the CLICK configuration file;  see (reference below).  This configuration file is initialized and then updated by the Control Module.  With the current v1.6 implementation, the CLICK modular router must be restarted after the configuration file is updated.
    6269
    63 
    64 
    6570=== 4.3.2  Open Flow Switch ===
    6671
     72=== 4.3.3  GENI Access Network ===
     73
     74The GENI Access Network provides one or more subnets, each identified by a VLAN tag.
     75
     76A group of MSs, each identified by its MAC address, is associated with a particular subnet/VLAN tag.  Typically, each subnet/VLAN tag is associated with a particular "slice".
     77
     78When a particlar group of MSs is to be provided with IP service, its subnet includes a DHCP service that assigned an IP address to each registered MS.
     79
     80
    6781== 4.4  Control Module ==
    6882
    69 The Control Module controls the functionality of the NEC BTS, the ASN-GW Controller and the Data Path Module (e.g., CLICK Modular Router).
     83The Control Module talks to the NEC BTS, the ASN-GW Controller and the Data Path Module (e.g., CLICK Modular Router).
    7084
    7185For Case 1, the Control Module is the Simple Authorization Manager (SAM).