Modify Emergency Handover Data of Cell Handover(MOD CELLHOEMG)

Function

A configuration command that modifies the emergency handover parameters of the cell. In this command, Cell Index or Cell Name uniquely identifies a cell.

Note

The sum of A1-A8 in the emergency handover filter parameters must be equal to 80.

Parameters

ID Name Description
IDXTYPE Index Type

Meaning:Index Type

Value range:BYNAME(By Name),BYIDX(By Index)

Explanation:Index Type.

Default value:None

CELLIDX Cell Index

Meaning:Cell Index

Value range:0~2047

Explanation: This parameter indicates the source cell index. The source cell index must be unique.

Default value:None

CELLNAME Cell Name

Meaning:Cell Name

Value range:1-32 characters

Explanation: This parameter indicates the name of the source cell. The name of each cell under one BSC must be unique.

Default value:None

HOCTRLSWITCH Current HO Control Algorithm

Meaning:Current HO Control Algorithm

Value range:HOALGORITHM1(HO Algorithm I),HOALGORITHM2(HO Algorithm II)

Explanation:This parameter specifies whether HO Algorithm I or HO Algorithm II is valid.

Default value:None

TALIMIT Emergency Handover TA Threshold

Meaning:Emergency Handover TA Threshold

Value range:0~255

Explanation:An emergency handover is triggered when TA is greater than or equal to the value of this parameter.

Default value:None

DLQUALIMIT DL Qual. Threshold

Meaning:DL Qual. Threshold

Value range:0~70

Explanation:This parameter specifies the downlink receive quality threshold of an emergency handover. An emergency handover is triggered when the downlink receive quality is greater than or equal to the DL Qual. Threshold.

When an emergency handover is triggered, an inter-cell handover should be preferentially selected. An intra-cell handover, however, is triggered if no candidate cell is available and if intra-cell handovers are allowed.

Default value:None

ULQUALIMIT UL Qual. Threshold

Meaning:UL Qual. Threshold

Value range:0~70

Explanation:This parameter specifies the uplink quality threshold of an emergency handover. An emergency handover due to bad quality is triggered when the uplink receive quality is greater than or equal to the UL Qual. Threshold.

When an emergency handover is triggered, an inter-cell handover should be preferentially selected. An intra-cell handover, however, is triggered if no candidate cell is available and if intra-cell handovers are allowed.

Default value:None

FLTPARAA1 Filter Parameter A1

Meaning:Filter Parameter A1

Value range:0~20

Explanation:This parameter is used for configuring the filter for the rapidly dropped receive level. Together with filter parameter B, it is one of the nine filter parameters. The corresponding formula is as follows (in the program, the value of A1 to A8 can be obtained by subtracting 10 from the configured value, and B is the negative value of the configured value):

C1(nt) = A1 x C(nt) + A2 x C(nt-t) + A3 x C(nt-2t) +...+ A8 x C(nt-7t). Where, C(nt) is the uplink RX_Level of the serving cell in the MR received at the time of nt. If C1(nt) is smaller than B, and if C(nt) is below the Edge HO RX_LEV Thrsh., then the signal level is considered to be rapid dropping.

Filter parameters A1 to A8 may be smaller than or equal to 10. Parameters A1 to A8 correspond to a1 to a8 in the program, and ai = Ai-10 (i = 1-8). Therefore, among a1 to a8 in the program, there must be values smaller than or equal to 0.

For example, if the receive level drops rapidly in a granularity period, you need to set A3 to A8 to 10, A1 to 0, and A2 to 20. In this case, C1(nt) = a1 x C (nt) + a2 x C(nt-t) = 10C(nt-t)-10C(nt). To trigger a rapid level drop handover, you should set C1(nt) to a value smaller than B. and then the fast level drop appears in a MR period. The formula reflects the rapid drop of the cell level in an MR.

You can configure the filter to define the number of MRs used and the extent to which the level drops. However, the setting of this parameter is complicated.

Default value:None

FLTPARAA2 Filter Parameter A2

Meaning:Filter Parameter A2

Value range:0~20

Explanation:This parameter is used for configuring the filter for the rapidly dropped receive level. Together with filter parameter B, it is one of the nine filter parameters. The corresponding formula is as follows (in the program, the value of A1 to A8 can be obtained by subtracting 10 from the configured value, and B is the negative value of the configured value):

C1(nt) = A1 x C(nt) + A2 x C(nt-t) + A3 x C(nt-2t) +...+ A8 x C(nt-7t). Where, C(nt) is the uplink RX_Level of the serving cell in the MR received at the time of nt. If C1(nt) is smaller than B, and if C(nt) is below the Edge HO RX_LEV Thrsh., then the signal level is considered to be rapid dropping.

Filter parameters A1 to A8 may be smaller than or equal to 10. Parameters A1 to A8 correspond to a1 to a8 in the program, and ai = Ai-10 (i = 1-8). Therefore, among a1 to a8 in the program, there must be values smaller than or equal to 0.

For example, if the receive level drops rapidly in a granularity period, you need to set A3 to A8 to 10, A1 to 0, and A2 to 20. In this case, C1(nt) = a1 x C (nt) + a2 x C(nt-t) = 10C(nt-t)-10C(nt). To trigger a rapid level drop handover, you should set C1(nt) to a value smaller than B. and then the fast level drop appears in a MR period. The formula reflects the rapid drop of the cell level in an MR.

You can configure the filter to define the number of MRs used and the extent to which the level drops. However, the setting of this parameter is complicated.

Default value:None

FLTPARAA3 Filter Parameter A3

Meaning:Filter Parameter A3

Value range:0~20

Explanation:This parameter is used for configuring the filter for the rapidly dropped receive level. Together with filter parameter B, it is one of the nine filter parameters. The corresponding formula is as follows (in the program, the value of A1 to A8 can be obtained by subtracting 10 from the configured value, and B is the negative value of the configured value):

C1(nt) = A1 x C(nt) + A2 x C(nt-t) + A3 x C(nt-2t) +...+ A8 x C(nt-7t). Where, C(nt) is the uplink RX_Level of the serving cell in the MR received at the time of nt. If C1(nt) is smaller than B, and if C(nt) is below the Edge HO RX_LEV Thrsh., then the signal level is considered to be rapid dropping.

Filter parameters A1 to A8 may be smaller than or equal to 10. Parameters A1 to A8 correspond to a1 to a8 in the program, and ai = Ai-10 (i = 1-8). Therefore, among a1 to a8 in the program, there must be values smaller than or equal to 0.

For example, if the receive level drops rapidly in a granularity period, you need to set A3 to A8 to 10, A1 to 0, and A2 to 20. In this case, C1(nt) = a1 x C (nt) + a2 x C(nt-t) = 10C(nt-t)-10C(nt). To trigger a rapid level drop handover, you should set C1(nt) to a value smaller than B. and then the fast level drop appears in a MR period. The formula reflects the rapid drop of the cell level in an MR.

You can configure the filter to define the number of MRs used and the extent to which the level drops. However, the setting of this parameter is complicated.

Default value:None

FLTPARAA4 Filter Parameter A4

Meaning:Filter Parameter A4

Value range:0~20

Explanation:This parameter is used for configuring the filter for the rapidly dropped receive level. Together with filter parameter B, it is one of the nine filter parameters. The corresponding formula is as follows (in the program, the value of A1 to A8 can be obtained by subtracting 10 from the configured value, and B is the negative value of the configured value):

C1(nt) = A1 x C(nt) + A2 x C(nt-t) + A3 x C(nt-2t) +...+ A8 x C(nt-7t). Where, C(nt) is the uplink RX_Level of the serving cell in the MR received at the time of nt. If C1(nt) is smaller than B, and if C(nt) is below the Edge HO RX_LEV Thrsh., then the signal level is considered to be rapid dropping.

Filter parameters A1 to A8 may be smaller than or equal to 10. Parameters A1 to A8 correspond to a1 to a8 in the program, and ai = Ai-10 (i = 1-8). Therefore, among a1 to a8 in the program, there must be values smaller than or equal to 0.

For example, if the receive level drops rapidly in a granularity period, you need to set A3 to A8 to 10, A1 to 0, and A2 to 20. In this case, C1(nt) = a1 x C (nt) + a2 x C(nt-t) = 10C(nt-t)-10C(nt). To trigger a rapid level drop handover, you should set C1(nt) to a value smaller than B. and then the fast level drop appears in a MR period. The formula reflects the rapid drop of the cell level in an MR.

You can configure the filter to define the number of MRs used and the extent to which the level drops. However, the setting of this parameter is complicated.

Default value:None

FLTPARAA5 Filter Parameter A5

Meaning:Filter Parameter A5

Value range:0~20

Explanation:This parameter is used for configuring the filter for the rapidly dropped receive level. Together with filter parameter B, it is one of the nine filter parameters. The corresponding formula is as follows (in the program, the value of A1 to A8 can be obtained by subtracting 10 from the configured value, and B is the negative value of the configured value):

C1(nt) = A1 x C(nt) + A2 x C(nt-t) + A3 x C(nt-2t) +...+ A8 x C(nt-7t). Where, C(nt) is the uplink RX_Level of the serving cell in the MR received at the time of nt. If C1(nt) is smaller than B, and if C(nt) is below the Edge HO RX_LEV Thrsh., then the signal level is considered to be rapid dropping.

Filter parameters A1 to A8 may be smaller than or equal to 10. Parameters A1 to A8 correspond to a1 to a8 in the program, and ai = Ai-10 (i = 1-8). Therefore, among a1 to a8 in the program, there must be values smaller than or equal to 0.

For example, if the receive level drops rapidly in a granularity period, you need to set A3 to A8 to 10, A1 to 0, and A2 to 20. In this case, C1(nt) = a1 x C (nt) + a2 x C(nt-t) = 10C(nt-t)-10C(nt). To trigger a rapid level drop handover, you should set C1(nt) to a value smaller than B. and then the fast level drop appears in a MR period. The formula reflects the rapid drop of the cell level in an MR.

You can configure the filter to define the number of MRs used and the extent to which the level drops. However, the setting of this parameter is complicated.

Default value:None

FLTPARAA6 Filter Parameter A6

Meaning:Filter Parameter A6

Value range:0~20

Explanation:This parameter is used for configuring the filter for the rapidly dropped receive level. Together with filter parameter B, it is one of the nine filter parameters. The corresponding formula is as follows (in the program, the value of A1 to A8 can be obtained by subtracting 10 from the configured value, and B is the negative value of the configured value):

C1(nt) = A1 x C(nt) + A2 x C(nt-t) + A3 x C(nt-2t) +...+ A8 x C(nt-7t). Where, C(nt) is the uplink RX_Level of the serving cell in the MR received at the time of nt. If C1(nt) is smaller than B, and if C(nt) is below the Edge HO RX_LEV Thrsh., then the signal level is considered to be rapid dropping.

Filter parameters A1 to A8 may be smaller than or equal to 10. Parameters A1 to A8 correspond to a1 to a8 in the program, and ai = Ai-10 (i = 1-8). Therefore, among a1 to a8 in the program, there must be values smaller than or equal to 0.

For example, if the receive level drops rapidly in a granularity period, you need to set A3 to A8 to 10, A1 to 0, and A2 to 20. In this case, C1(nt) = a1 x C (nt) + a2 x C(nt-t) = 10C(nt-t)-10C(nt). To trigger a rapid level drop handover, you should set C1(nt) to a value smaller than B. and then the fast level drop appears in a MR period. The formula reflects the rapid drop of the cell level in an MR.

You can configure the filter to define the number of MRs used and the extent to which the level drops. However, the setting of this parameter is complicated.

Default value:None

FLTPARAA7 Filter Parameter A7

Meaning:Filter Parameter A7

Value range:0~20

Explanation:This parameter is used for configuring the filter for the rapidly dropped receive level. Together with filter parameter B, it is one of the nine filter parameters. The corresponding formula is as follows (in the program, the value of A1 to A8 can be obtained by subtracting 10 from the configured value, and B is the negative value of the configured value):

C1(nt) = A1 x C(nt) + A2 x C(nt-t) + A3 x C(nt-2t) +...+ A8 x C(nt-7t). Where, C(nt) is the uplink RX_Level of the serving cell in the MR received at the time of nt. If C1(nt) is smaller than B, and if C(nt) is below the Edge HO RX_LEV Thrsh., then the signal level is considered to be rapid dropping.

Filter parameters A1 to A8 may be smaller than or equal to 10. Parameters A1 to A8 correspond to a1 to a8 in the program, and ai = Ai-10 (i = 1-8). Therefore, among a1 to a8 in the program, there must be values smaller than or equal to 0.

For example, if the receive level drops rapidly in a granularity period, you need to set A3 to A8 to 10, A1 to 0, and A2 to 20. In this case, C1(nt) = a1 x C (nt) + a2 x C(nt-t) = 10C(nt-t)-10C(nt). To trigger a rapid level drop handover, you should set C1(nt) to a value smaller than B. and then the fast level drop appears in a MR period. The formula reflects the rapid drop of the cell level in an MR.

You can configure the filter to define the number of MRs used and the extent to which the level drops. However, the setting of this parameter is complicated.

Default value:None

FLTPARAA8 Filter Parameter A8

Meaning:Filter Parameter A8

Value range:0~20

Explanation:This parameter is used for configuring the filter for the rapidly dropped receive level. Together with filter parameter B, it is one of the nine filter parameters. The corresponding formula is as follows (in the program, the value of A1 to A8 can be obtained by subtracting 10 from the configured value, and B is the negative value of the configured value):

C1(nt) = A1 x C(nt) + A2 x C(nt-t) + A3 x C(nt-2t) +...+ A8 x C(nt-7t). Where, C(nt) is the uplink RX_Level of the serving cell in the MR received at the time of nt. If C1(nt) is smaller than B, and if C(nt) is below the Edge HO RX_LEV Thrsh., then the signal level is considered to be rapid dropping.

Filter parameters A1 to A8 may be smaller than or equal to 10. Parameters A1 to A8 correspond to a1 to a8 in the program, and ai = Ai-10 (i = 1-8). Therefore, among a1 to a8 in the program, there must be values smaller than or equal to 0.

For example, if the receive level drops rapidly in a granularity period, you need to set A3 to A8 to 10, A1 to 0, and A2 to 20. In this case, C1(nt) = a1 x C (nt) + a2 x C(nt-t) = 10C(nt-t)-10C(nt). To trigger a rapid level drop handover, you should set C1(nt) to a value smaller than B. and then the fast level drop appears in a MR period. The formula reflects the rapid drop of the cell level in an MR.

You can configure the filter to define the number of MRs used and the extent to which the level drops. However, the setting of this parameter is complicated.

Default value:None

FLTPARAB Filter Parameter B

Meaning:Filter Parameter B

Value range:0~200

Explanation:This parameter is used for configuring the filter for the rapidly dropped receive level. This parameter indicate specifies the drop trend of the receive level within a period.

If this parameter is set to a higher value, a more rapid level drop is required for triggering a rapid level drop handover. This parameter is used together with the Filter Parameters A1 to A8.

For details, refer to Filter Parameters A1-A8.

Default value:None

NODLMRHOEN No Dl Mr.HO Allowed

Meaning:No Dl Mr.HO Allowed

Value range:NO(NO),YES(YES)

Explanation:This parameter is used to control the no downlink measurement report handover algorithm.

If this parameter is set to 0, the no downlink measurement report handover algorithm is disabled. Therefore, handover decision related to no downlink measurement report is not allowed in this cell.

If this parameter is set to 1, the no downlink measurement report handover algorithm is enabled. Therefore, handover decision related to no downlink measurement report is allowed in this cell.

Default value:None

NODLMRHOQUALLIMIT No Dl Mr.Ul Qual HO Limit

Meaning:No Dl Mr.Ul Qual HO Limit

Value range:0~70

Explanation:If the downlink MRs are not included in the MRs received, and if the uplink receive quality is greater than or equal to the value of this parameter, a no downlink measurement report emergency handover is triggered.

When an emergency handover is triggered, an inter-cell handover is preferentially selected. An intra-cell handover, however, is triggered if no candidate cell is available and if intra-cell handovers are allowed.

Default value:None

NODLMRHOALLOWLIMIT Cons.No Dl Mr.HO Allowed Limit

Meaning:Cons.No Dl Mr.HO Allowed Limit

Value range:0~64

Explanation:If the number of consecutive measurement reports without the downlink measurement report is smaller than or equal to the value of this parameter, the handover decision related to no downlink measurement report is allowed.

Default value:None

Example

Modify the emergency handover parameters of the cell(Index Type = BYIDX(By Index); Cell Index = 0):
MOD CELLHOEMG: IDXTYPE=BYIDX, CELLIDX=0, HOCTRLSWITCH=HOALGORITHM1, TALIMIT=255, DLQUALIMIT=60, ULQUALIMIT=60, ULLIMQUAL=50, DLLIMQUAL=50, ULLIMLEV=15, DLLIMLEV=25, FLTPARAA1=10, FLTPARAA2=10, FLTPARAA3=10, FLTPARAA4=10, FLTPARAA5=10, FLTPARAA6=10, FLTPARAA7=10, FLTPARAA8=10, FLTPARAB=0, NODLMRHOEN=NO, NODLMRHOQUALLIMIT=60, NODLMRHOALLOWLIMIT=8;
Related reference
Add BTS(ADD BTS)
Add Cell(ADD CELL)

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