Medium Access Control (MAC) and Physical Layer (PHY) - CISE

4-June-07 P1901_PRO_016_r0
8.2.2.1 Configuration
The reference step shall be configured within any master of a BPL cell. This parameter is configured using the
QOS_LATENCY_STEP parameter (min 20ms, max 400ms).
Mapping a Max_Subcell_Access_Time to a priority: Such a mapping shall be declared within each master by using
the QOS_LATENCY.prio+1 parameter.
8.2.3 Resource reservation type
This parameter is related to the type of claimed guarantees provided in terms of node resources and time resources.
It can take three values:
• Type Best Effort: No guarantees on the node and time resources. This type will be mapped with the nonguaranteed
service classes. Resources are granted on a Best Effort basis.
• Type ABR (Available Bit-Rate): Requests ask for node and time resources for which a minimum bandwidth
can be guaranteed with a peak over the minimum. The peak can be limited by the network capability or the
node limit bandwidth.
• Type VBR (Variable Bit-Rate):Requests ask for node and time resources for which an average bandwidth
can be guaranteed with a maximum variation around this average.
• Type CBR (Constant Bit-Rate):Requests ask for individual guarantees in terms of node and time resources.
The granted node and time resources are not shared. The claimed bandwidth is guaranteed.
Note: Any class which is associated to an ABR, VBR or CBR type corresponds to a connected service requiring
initiation of a Connection Admission Control Procedure. By extension, CBR, VBR or ABR flows are called
connected flows unlike Best Effort flows which are non connected flows.
A maximum upstream and downstream bandwidth limitation applies to all the Best Effort and ABR flows of the
same node (see 12).
CBR and VBR traffic shall be reserved for operator services such as VoIP and video streaming services (IPTV,
VOD, …), and shall be out of the bandwidth limitation. To accept or deny these services, the FMN must assure that
network resources will be available and mechanisms for AAA services shall be used in order to authenticate the
service can be used by the node.
8.2.3.1 Configuration
Mapping a Resource Reservation Type to a priority: Such a mapping shall be declared within each master by using
the QOS_PRIORSV.prio+1 parameter.
Submission page 180 UPA-OPERA