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

Timestamp:

Dec 8, 2010, 10:07:08 PM (13 years ago)

Author:

hmussman

Comment:

—

Old/WiMAX/02

@@ -43 +43 @@
 The 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. 
 
-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.
-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.
+ * 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.
+
+ * 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.
 
 Currently, the only supported Data Path Module is the Click Modular Router
-Later, it is expected that an Open FLow Switch will be supported. 
+Later, it is expected that an Open Flow Switch will be supported. 
 
 === 4.3.1  Click Modular Router ===
@@ -53 +54 @@
 The currently supported Data Path Module is the Click Modular Router, v1.6;  later, this is planned to be replaced with v1.8.
 
-The functionality of the CLICK Modular Router is shown in Fig 4.
-
-It is based on a dynamically configurable L2 learning switch.
-
-Both UL and DL data paths are automatically created and installed when MSs associate.
+The functionality of the CLICK Modular Router is shown in Fig 4.  It is based on a dynamically configurable L2 learning switch.
+
+Both UL and DL data paths are automatically created and installed when MSs associate.  Dataflows are:
+
+ * DL from GENI Access Network:  classifier, switch, tunnels
+
+ * UL from Clients: ARP lookup, switch, GENI Access Network
+
+ * DHCP allocations: learned by the parser, which populates entries in a ARP manager
+
+ * ARP Requests from GENI Access Network: handled by ARP manager
 
 Data 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.
 
-
-
 === 4.3.2  Open Flow Switch ===
 
+=== 4.3.3  GENI Access Network ===
+
+The GENI Access Network provides one or more subnets, each identified by a VLAN tag.
+
+A 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".
+
+When 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.
+
+
 == 4.4  Control Module ==
 
-The Control Module controls the functionality of the NEC BTS, the ASN-GW Controller and the Data Path Module (e.g., CLICK Modular Router).
+The Control Module talks to the NEC BTS, the ASN-GW Controller and the Data Path Module (e.g., CLICK Modular Router).
 
 For Case 1, the Control Module is the Simple Authorization Manager (SAM).