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Feature #2722

document RACH tuning parameters more thoroughly, give explanations

Added by laforge over 1 year ago. Updated 12 months ago.

Status:
New
Priority:
High
Assignee:
Category:
-
Target version:
-
Start date:
12/08/2017
Due date:
% Done:

0%

Spec Reference:

Description

Like any GSM network, we do have parameters such as rach max retransmission and rach tx integer that influence the RACH load (and RACH/IMM-ASS delay).

Users on lightly loaded networks with few users need different defaults than users o highly [over]loaded cells.

See also: In general:
  • higher tx-integer will be better for high-load, but will increase the delay of a MS getting any channel
  • higher max-retransmissions means higher rach-load on the cell as the MS will make more re-tries. However, higher chance that it will get through, even in adverse radio conditions.

Let's make sure we give proper advice to our users.


Related issues

Related to OsmoBSC - Feature #2591: ramp up cell slowly based on access control class to avoid severe RACH/SDCCH overloadResolved10/23/2017

Related to OsmoBSC - Feature #1611: be more efficient in batching IMMEDIATE ASSIGN REJECT messagesRejected02/23/2016

Related to OsmoBSC - Feature #2592: Use "waiting time" of IMMEDIATE ASSIGN REJECTResolved10/23/2017

Related to OsmoBSC - Feature #2893: automatic simulator for large LU load Stalled01/27/2018

History

#1 Updated by laforge over 1 year ago

  • Related to Feature #2591: ramp up cell slowly based on access control class to avoid severe RACH/SDCCH overload added

#2 Updated by laforge over 1 year ago

  • Related to Feature #1611: be more efficient in batching IMMEDIATE ASSIGN REJECT messages added

#3 Updated by laforge over 1 year ago

  • Related to Feature #2592: Use "waiting time" of IMMEDIATE ASSIGN REJECT added

#4 Updated by laforge over 1 year ago

  • Related to Feature #2893: automatic simulator for large LU load added

#5 Updated by laforge over 1 year ago

  • Assignee changed from sysmocom to daniel

#6 Updated by daniel 12 months ago

  • Priority changed from Normal to High

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