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M900/M1800 Base Station Controller

Feature Description Contents

Contents

10 SDCCH Dynamic Adjustment....................................................10-1

10.1 Introduction................................................................................................................................................10-2

10.1.1 Application................................................................................................................................ ........10-2

10.1.2 Availailit!............................................................................................................................... .........10-2

10.1." #estrictions........................................................................................................................................10-2

10.2 Function Con$i%uration..............................................................................................................................10-2

10.2.1 Con$i%uration &rocess.......................................................................................................................10-2

10.2.2 &ara'eters.........................................................................................................................................10-"

10.2." (!pical Cases.....................................................................................................................................10-"

10." Maintenance In$or'ation...........................................................................................................................10-"

10.".1 #elated Alar's..................................................................................................................................10-"

10.".2 #elated (ra$$ic Statistics....................................................................................................... .......... ..10-)

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10 SDCC D!na'ic Adust'ent


Feature Description

10.1 Introduction

10.1.1 Application

SDCC d!na'ic adust'ent per$or's te $olloin% $unctions3

4pti'i5in% te usa%e o$ te tra$$ic cannel and si%nalin% cannel

#educin% te SDCC cannel loc6

Miti%atin% te i'pact on s!ste' per$or'ance caused ! SDCC initial con$i%uration

In te 7SM s!ste' 'ost t!pes o$ calls need to use si%nalin% cannel suc as location update

and point-to-point 'essa%e. (e voice and data calls also need to use te si%nalin% cannel$or a sort ti'e en settin% up a call.

(e nu'er o$ si%nalin% cannels depends on te tra$$ic 'odel te current tra$$icdistriution and te 4 statistics.

(e $olloin% descries o te tree $actors in$luence te nu'er o$ si%nalin% cannels.

(e cells at te ed%e o$ te location areas ave 'ore location update services. So te!

need 'ore SDCCs tan te %eneral cells do.

(e increase o$ 'essa%es also increases te reuire'ent $or SDCCs.

en te nu'er o$ te 7SM users suddenl! increases 'an! users cannot ave access

to te netor6. In tis case te (Cs are trans$or'ed into SDCCs. (en 'ost users

can ave access to te netor6 oever callin% can still not e ensured.

SDCC d!na'ic adust'ent loers te reuest $or eactness o$ te uantit! o$ te si%nalin%

cannels and epands te s!ste' capacit!.

10.1.2 Aailability

All te versions support SDCC d!na'ic adust'ent itout additional so$tare and

ardare.

10.1.! "estrictions

SDCC d!na'ic adust'ent occupies te (Cs and tus loers te tra$$ic earer capailit!o$ te cell.

10.2 #unction Con$%uration

10.2.1 Con$%uration &rocess

In d!na'ic con$i%uration 'ode set SD Dynamic Allocation Allowedto Yes.

For details see section ).10 :Modi$!in% Cell;s Cannel Mana%e'ent &ara'eter: in te

M900/M1800 BSC Data Configuration Manual Dynamic Configuration.

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Feature Description 10 SDCC D!na'ic Adust'ent

10.2.2 &arameters

Fi%ure 1.1sos te para'eters o$ te SDCC d!na'ic adust'ent.

Figure 1.1 SDCC d!na'ic adust'ent para'eters

'ame (nit "an%e

De)ault Description

SD D!na'ic Allocation

Alloed

"+00 +00 (e 'ini'u' duration $or teSDCC to e sitced ac6 to

(C.

10.2.! Typical Cases

A certain cell as (#@0 (#@1 and (#@2. (i'eslot 0 o$ (#@ 0 is on te BCC and(i'eslot 1 is on te SDCC/8. (e oter ti'eslots are on $ull-rate (Cs.

SDCC d!na'ic adust'ent can ti'el! can%e te nu'er o$ SDCCs accordin% to te

tra$$ic volu'e.

Step 1 Set SD Dynamic Allocation Allowedto Yes.

Step 2 Set te para'eters in te dialo% o as son in10.2.2 IStep 1Fi%ure 1.1.

en te nu'er o$ idle SDCCs is less tan to te s!ste' adusts a proper $ull-rate

(C to ei%t SDCCs to epand te SDCC capacit!.

I$ te nu'er o$ SDCC is 'ore tan ten $or a continuous period o$ ti'e te s!ste'

sitces ei%t SDCCs ac6 to $ull-rate (Cs.

(o adust te SDCC as earl! as possile set te nu'er lar%er in Idle SD Thrsh..

(o sitc ac6 to te (C set te value s'aller in T! "in. #eco$ery Time.

----%nd

10.! *aintenance In)ormation

10.!.1 "elated Alarms


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10 SDCC D!na'ic Adust'ent


Feature Description

10.!.2 "elated Tra+c Statistics

Fi%ure 1.1sos te relevant tra$$ic indees.

Figure 1.1 SDCC d!na'ic adust'ent per$or'ance indees

'o. &er)ormance inde,es

1 (i'es o$ (C convert to SDCC

2 (i'es o$ SDCC convert to (C

For details seeM900/M1800 BSC Traffic Statistic Manual.

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01-10 sdcch dynamic adjustment

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