User Manual
Chapter 4 - Operation and Administration of the Micro BTS BS Menu
4Motion 733 System Manual
Assuming a sector with diversity (different channels conditions) of active users, ET
scheme enables higher aggregate sector throughput at the expense of data-rate
fairness among users, while ER scheduling scheme ensures maximum data-rate
fairness among users at the expense of lower aggregate sector throughput.
Using ER scheduling scheme exposes the system to excessive allocation of air
resources to highly active users having relatively poorer channel conditions. To
ensure data-rate fairness, more resources will to be allocated to these users
compared to users with relatively good channel conditions. The effect of a small
number of such users within the sector will be reflected by reduced aggregate
sector throughput as well as degradation of achievable rates for all users.
To protect against “abusing” users, an instantaneous rate threshold can be
defined within the scheduling scheme in which the amount of air resources for
users with continuous instantaneous rate below the threshold is being limited.
The more the abusing users' instantaneous rate is below the threshold, the more
resource allocations limitation is applied.
Three levels of dynamic protection are available:
No protection.
Low protection level - Protection against users with very poor channel
conditions. Should be used where the abusing users instantaneous rates are
far below the average instantaneous rate within the sector.
Medium protection - Protection against users with relatively poor or very poor
channel conditions. Should be used where the abusing users instantaneous
rates are below or far below the average instantaneous rate within sector.
A dynamic protection mechanism is implemented, in which the mechanism of
limiting resource allocations is automatically and dynamically activated when
needed.
The Scheduler menu enables viewing/updating the values configured for the
following parameters:
“Scheduler Mode”
“Scheduler DL Abuse Protection Level”
“Scheduler UL Abuse Protection Level”