Dynamic Half Rate Allocation (DHA)

Dynamic Half Rate Allocation (DHA) – the feature used for new connections at TCH allocation that allows the possibility to direct traffic towards FR or HR connections resulting in a better flexibility to control traffic resources. The end user will experience less congestion and hence increased accessibility to the network.

1. Dynamic Half Rate Allocation

a. The feature is invoked if the parameter DHA is ON. At high traffic load TCH/HR have precedence and at low traffic load TCH/FR have precedence.

b. If the MS and the cell support AMR HR and the number of idle FR TCH divided by the total number of de-blocked FR TCH is equal or above DTHAMR FR TCH will have precedence over HR TCH. If the number of idle FR TCH divided by the total number of de-blocked FR TCH is less than DTHAMR HR TCH will have precedence over FR TCH.

c. If the MS or the cell do not support AMR HR and the number of idle FR TCH divided by the total number of de-blocked FR TCH is equal or above DTHNAMR FR TCH will have precedence over HR TCH. If the number of idle FR TCH divided by the total number of de-blocked FR
TCH is less than DTHNAMR HR TCH will have precedence over FR TCH.

2. Main Controlling Parameters
a. DHA is used to turn the feature Dynamic Half Rate Allocation ON orOFF. The parameter is set per cell.

b. DTHAMR is the threshold parameter for AMR HR capable MS:s at channel allocation below which an AMR MS will be allocated on a HR channel. The parameter expresses the ratio between idle and deblocked TCH:s in percent and is set per cell.

c. DTHNAMR is the threshold parameter for non AMR HR but DR capable MS:s at channel allocation below which a DR capable MS will be allocated on a HR channel. The parameter expresses the ratio between idle and de-blocked TCH:s in percent and is set per cell.

Commande to veiw parameter existing

RLDHP:CELL=cell;

CELL DYNAMIC HR ALLOCATION DATA



CELL     DHA  DTHAMR  DTHNAMR

cell     dha  dthamr  dthnamr

.        .     .        .

.        .     .        .

.        .     .        .

cell     dha  dthamr  dthnamr



/    \

|NONE|

\    /

/                   \

|EOT DURING PRINTOUT|

\                   /

/               \

|FAULT INTERRUPT|

|fault type     |

\               /

END

Commande to change parameter Halfrate

RLDHC:CELL=cell+[,DHA=dha][,DTHAMR=dthamr][,DTHNAMR=dthnamr]+;

CELL=cell	Cell designation This is a symbolic name of a defined cell.
DHA=dha	Dynamic Half Rate (HR) Allocation OFF Dynamic HR Allocation is disabled. ON Dynamic HR Allocation is enabled.
DTHAMR=dthamr	Dynamic HR Allocation threshold for Adaptive Multi Rate (AMR) capable mobiles This parameter indicates a percentage value of number of deblocked Full Rate (FR) Traffic Channels (TCHs) in the cell when Dynamic HR Allocation is enabled and the mobile supports AMR HR. When the number of idle FR TCHs in the cell is above or equal to the value, FR TCHs will have precedence over HR TCHs. When the number of idle FR TCHs in the cell is below to the value, HR TCHs will have precedence over FR TCHs. For the default value for DTHAMR see the Application Information for block Numeral 0 - 100
DTHNAMR=dthnamr	Dynamic HR Allocation threshold for mobiles not capable of AMR This parameter indicates a percentage value of number of deblocked FR TCHs in the cell when Dynamic HR Allocation is enabled and the mobile does not support AMR HR. When the number of idle FR TCHs in the cell is above or equal to the value, FR TCHs will have precedence over HR TCHs. When the number of idle FR TCHs in the cell is below to the value, HR TCHs will have precedence over FR TCHs. For the default value for DTHNAMR see the Application Information for block Numeral 0 - 100