pioneerelex
2011-12-12, 10:19 PM
Hi Friends,
Find below article about SDCCH Blocking analysis and optimization tips:
SDCCH Blocking is probably due to one or more reasons:
1. No Access to SDCCH
2. Failure before Assignment of TCH.
3. High Paging Load
4. Incorrect or Inapproriate timer values
Optimization tips :
1. No Access to SDCCH.
2. Failure before Assignment of TCH.
3. High Paging Load Irreguler paging distribution in location areas results in SDCCH Blocking. Higher paging load in certain location area mean higher location updates on SDCCH resulting in SDCCH Blocking.
TIPS : A location area with a high paging load needs to be reduced in size to relieve SDCCH Blocking. A location area with low paging load need to be enlarged in size to reduced the overal number of location ares.
4. Incorrect or Inappropriate timer values Timer rr_t3 111 sets the amount of time allowed to delay the deactivation of a traffic channel (TCH) after the disconnection of the main signaling link.
TIPS : The suitable value for this timer is 1200 ms (max being 1500 ms). The timer will cause the BSS to wait before the channel in question is allocated another connection.
A lower value of timer will result in higher capacity since the channel is held for less time before being released.
Find below article about SDCCH Blocking analysis and optimization tips:
SDCCH Blocking is probably due to one or more reasons:
1. No Access to SDCCH
2. Failure before Assignment of TCH.
3. High Paging Load
4. Incorrect or Inapproriate timer values
Optimization tips :
1. No Access to SDCCH.
2. Failure before Assignment of TCH.
3. High Paging Load Irreguler paging distribution in location areas results in SDCCH Blocking. Higher paging load in certain location area mean higher location updates on SDCCH resulting in SDCCH Blocking.
TIPS : A location area with a high paging load needs to be reduced in size to relieve SDCCH Blocking. A location area with low paging load need to be enlarged in size to reduced the overal number of location ares.
4. Incorrect or Inappropriate timer values Timer rr_t3 111 sets the amount of time allowed to delay the deactivation of a traffic channel (TCH) after the disconnection of the main signaling link.
TIPS : The suitable value for this timer is 1200 ms (max being 1500 ms). The timer will cause the BSS to wait before the channel in question is allocated another connection.
A lower value of timer will result in higher capacity since the channel is held for less time before being released.