ranap services

8/11/2019 RANAP Services

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5 RANAP Services

RANAP provides the signalling service between UTRAN and CN that is required to

full the RANAP functions

described in clause ! RANAP services are divided into three groups based on

Service Access Points "SAP# dened in

$%&'(

%! )eneral control services( The* are related to the whole +u interface instance

between RNC and logical CN

do,ain- and are accessed in CN through the )eneral Control SAP! The* utilise

connectionless signalling

transport provided b* the +u signalling bearer!

.! Notication services( The* are related to specied U/s or all U/s in specied

area- and are accessed in CN

through the Notication SAP! The* utilise connectionless signalling transport

provided b* the +u signalling

bearer!

0! 1edicated control services( The* are related to one U/- and are accessed in CN

through the 1edicated Control

SAP! RANAP functions that provide these services are associated with +u signallingconnection that is

,aintained for the U/ in question! The +u signalling connection is realised with

connection oriented signalling

transport provided b* the +u signalling bearer!

& Services /2pected fro, Signalling Transport

Signalling transport "see $5'# shall provide two di3erent service ,odes for the

RANAP!

%! Connection oriented data transfer service! This service is supported b* a

signalling connection between RNC and

CN do,ain! +t shall be possible to d*na,icall* establish and release signalling

connections based on the need!


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/ach active U/ shall have its own signalling connection! The signalling connection

shall provide in sequence

deliver* of RANAP ,essages! RANAP shall be notied if the signalling connection

brea4s!

3GPP

Release 1999 15 3GPP TS 25.413 V3.14.0 (2003-09)

.! Connectionless data transfer service! RANAP shall be notied in case a RANAP

,essage did not reach the

intended peer RANAP entit*!

unctions of RANAP

RANAP protocol has the following functions(

6 Relocating serving RNC! This function enables to change the serving RNC

functionalit* as well as the related +u

resources "RA7"s# and Signalling connection# fro, one RNC to another!

6 8verall RA7 ,anage,ent! This function is responsible for setting up- ,odif*ing

and releasing RA7s!

6 9ueuing the setup of RA7! The purpose of this function is to allow placing so,e

requested RA7s into a queue-

and indicate the peer entit* about the queuing!

6 Requesting RA7 release! :hile the overall RA7 ,anage,ent is a function of the

CN- the RNC has the

capabilit* to request the release of RA7!

6 Release of all +u connection resources! This function is used to e2plicitl* release all

resources related to one +u

connection!

6 Requesting the release of all +u connection resources! :hile the +u release is

,anaged fro, the CN- the RNC has

the capabilit* to request the release of all +u connection resources fro, the

corresponding +u connection!

6 SRNS conte2t forwarding function! This function is responsible for transferring

SRNS conte2t fro, the RNC to


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the CN for inters*ste, change in case of pac4et forwarding!

6 Controlling overload in the +u interface! This function allows ad;usting the load in

the +u interface!

6 Resetting the +u! This function is used for resetting an +u interface!

6 Sending the U/ Co,,on +1 "per,anent NAS U/ identit*# to the RNC! This function

,a4es the RNC aware of

the U/ocation reporting! This function is used for transferring the actual location

infor,ation fro, RNC to the CN!


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6 1ata volu,e reporting function! This function is responsible for reporting

unsuccessfull* trans,itted 1> data

volu,e over UTRAN for specic RA7s!

6 Reporting general error situations! This function allows reporting of general error

situations- for which function

specic error ,essages have not been dened!

These functions are i,ple,ented b* one or several RANAP ele,entar* procedures

described in the following clause!

3GPP

Release 1999 16 3GPP TS 25.413 V3.14.0 (2003-09)

= RANAP Procedures

=!% /le,entar* Procedures

+n the following tables- all /Ps are divided into Class %- Class . and Class 0 /Ps "see

subclause 0!% for e2planation of

the di3erent classes#!

Table 1: Class 1

Elementar S!""ess#!l $!t"%me &ns!""ess#!l $!t"%me

Pr%"e'!re

ntatn*

+essa*e Res,%nse messa*e Res,%nse messa*e

+u Release +U R/>/AS/

C8??AN1

+U R/>/AS/ C8?P>/T/

Relocation

Preparation

R/>8CAT+8N

R/9U+R/1

R/>8CAT+8N C8??AN1 R/>8CAT+8N


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PR/PARAT+8N A+>UR/

Relocation

Resource

Allocation

R/>8CAT+8N

R/9U/ST

R/>8CAT+8N R/9U/ST

AC@N8:>/1)/

R/>8CAT+8N A+>UR/

Relocation

Cancel

R/>8CAT+8N

CANC/>

R/>8CAT+8N CANC/>

AC@N8:>/1)/

SRNS Conte2t

Transfer

SRNS C8NT/T

R/9U/ST

SRNS C8NT/T

R/SP8NS/

Securit* ?ode

Control

S/CUR+TB

?81/

C8??AN1


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S/CUR+TB ?81/

C8?P>/T/

S/CUR+TB ?81/ R//CT

1ata Dolu,e

Report

1ATA D8>U?/

R/P8RT

R/9U/ST

1ATA D8>U?/ R/P8RT

Reset R/S/T R/S/T AC@N8:>/1)/

Reset Resource R/S/T

R/S8URC/

R/S/T R/S8URC/

AC@N8:>/1)/

Table 2: Class 2

Elementar Pr%"e'!re +essa*e

RA7 Release Request RA7 R/>/AS/ R/

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