Moby Dick Consolidated System Integration Plan

D0103v1.doc Version 1 6.7.2003
QoS broker
QoS manager
FastHandover
module
QoS
Attendant
PEP
DSCP table
Enhanced IPv6 stack
Standard IPv6 stack
Local Log
Management
Local
Log
IPSec
Diffserv
logic
Internalinterface
Protocol communication
Kernel space
User space
Figure 37: QoSManager and its relationship with other modules
4.2.2.5.1 Communication with other AR elements and within the modules of the QoS Manager
Communication between the QoS Attendant and the FHM is for the following purposes:
• See corresponding paragraph in Fast Handover Module / MIPL section
Communication between the PEP and the DiffServ logic is for the following purposes:
• Once the PEP has queried the BB how to configure the DiffServ Logic, PEP will configure
queues in the DiffServ logic.
• Periodically, the PEP queries the DiffServ Logic about its queues’ state.
• When a new entry is added in the DSCP table, the PEP creates a filter in the DiffServ logic so
that the packets whose parameters match this entry are no longer blocked but given the
appropriated
• When a entry is removed in the DSCP table, the PEP removes the above mentioned filter in the
DiffServ logic.
• When a packet is blocked the DiffServ logic, communicates packet’s parameters to the PEP so
that it can initiate an authorization procedure (i.e. queering the BB).
Communication between the internal elements of the QoS Manager
Three elements constitute the QoS Manager, the PEP module, the QoS Attendant Module and the DSCP
table. PEP communicates with both QoS Attendant and DSCP table. No communication exists between
DSCP table and the QoS Attendant.
Communication between the PEP and the DSCP table is for the following purposes.
• Periodically the PEP checks the table for flows (CoA+DSCP) whose authorization live time is
about to expire. In that case, the PEP queries the BB for a reauthorisation.
• DSCP table contains the QoS treatment to apply to flows and, knowing this, the PEP can
configure accordingly the DiffServ Logic.
Communication between the PEP and the QoSAttendant is for the following purposes.
• The QoSAttendant tells the PEP to:
o ask the QoSBroker for a context transfer (in the oAR)
o start listening for the Context transfer message coming form the QoSBroker (in the
nAR)
• When the PEP in the nAR receives this context transfer it tells the QoSAttendant if there are or
not enough available QoS resources.
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