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Report - SET HOCOMM Command

Huawei Honduras

Set RNC OrientedHandover Algorithm

Common Parameters

Date: 17 Feb 2011

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Configuration Today

Tigo Network has the command today:

SET HOCOMM:COEXISTMEASTHDCHOICE=COEXIST_MEAS_THD_CHOICE_INTERFREQ

Suggested command:

SET HOCOMM:COEXISTMEASTHDCHOICE=COEXIST_MEAS_THD_CHOICE_INTERRAT

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SET HOCOMM:

COEXISTMEASTHDCHOICE=COEXIST_MEAS_

THD_CHOICE_INTERFREQ

When both interfreq and interrat measurements

cexist, which will be the choice to be measured ?

This command tells us that whenever my

interfreq HO doesnt occur for any reason, my

second priority will be InterRAT, because my

first option is InterFrequency.

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TGURNC 2da portadora

In Rural Cluster phase we can observe a slight increase in IRAT HO, however

we can see that it happens exactly at the point when InterFreq HO increase

slightly.

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Analysis

In Rural Cluster phase we can observe a slight increase

in IRAT HO, however we can see that it happens exactly

at the point when InterFreq increase slightly.

The reason for this, is because my interfrequency

Neighbor existed already for this clusters, however, my

second carrier was blocked. Causing that when

interfrequency HO was needed, it was sent automatically

to InterRAT HO, because it did not occur.

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TGURNC 2da portadora

In Urban phase we can observe a high increase in IRAT HO. Proving that when

interfrequency neighbors for all urban areas existed, and second carrier was

blocked my interfreq fail happens in grater ratio, so my interRAT will increaseas well.

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Analysis

In Urban phase we can observe a high increase in IRAT HO.

Proving that when interfrequency neighbors for all urban areas

existed, and second carrier was blocked my interfreq fail happens in

grater ratio, so my interRAT will increase as well.

The reason for this is the same as rural, since

my InterFreq neighbors existed, my IRAT HO

increase because my second carrier for thewhole Urban RNC is blocked, causing more

IRAT HOs.

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TGURNC 2da portadora

After deployment, we can observe that IRAT HO stabilize, and my

interfrequency HO increase.

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Analysis

After deployment, we can observe that IRAT HO

stabilize, and my interfrequency HO increase.

Why does this happen? Since TGU RNC

second carrier is deployed, and is never

blocked, my IRAT HO seem to stabilize,

this is because most of my interfrequencyHOs are succesfull since my second

carrier exists.

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TGURNC 2da portadora

However, there is an increase in IRAT, that is stable now, why does this

happen?

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However, there is increase.

However, there is an increase in IRAT, that is

stable now, why does this happen?

Because the SET HOCOMM command is set to

Interfrequency, and logically have more

Interfrequency attempts than IRAT attempts,

whenever all of this attempts are unsuccessful,they will be handed to IRAT, causing this te

increase.

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Why set the new command?

When we set to priority InterRAT, We need to remember

that IRAT HOs occur less than Interfrequency HOs.

This will cause that whenever IRAT HOs isunsuccessful it will be handed to InterFrequency,

causing less IRAT events.

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Conclusions

Whenever the Oriented Handover is set to

InterFREQ, it will increase IRAT HOs because

the have more InterFREQ HO events,

consequently more Handovers will be handedfrom UMTS to GSM.

If we set the Oriented Handover to INTERRAT, I

will have less IRAT HOs since all unsuccessful

IRAT will be handed to INTERFREQ cells.

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