133120716-diff-rab-and-rrc
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1.
What is difference RRC & RAB?
What is difference RRC & RAB?
RRC Setup Success Rate = (RRC Connection Setup Success / RRC Connection Request)
100%
RAB Setup Success Rate = RAB Assignment Success / RAB Assignment Request 100%
2. 2011-09-13 11:16 PM# ADS
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3. 2011-09-13, 11:36 PM#2
auto_art
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Re: What is difference RRC & RAB?
Originally Posted by forumuser-2008
What is difference RRC & RAB? RRC Setup Success Rate = (RRC Connection Setup Success / RRC Connection Request) 100% RAB Setup Success Rate = RAB Assignment Success / RAB Assignment Request 100%
it would be better if u read UMTS call flows. call flow can clear your doubt regarding the
same & best way to understand the difference.!
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Auto_artNPM Consul.Default PAS: londonpl rate threads for their usefulnesshare & care
4. 2011-09-13, 11:54 PM#3
forumuser-2008
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Re: What is difference RRC & RAB?
Originally Posted by auto_art
it would be better if u read UMTS call flows. call flow can clear your doubt regarding the same & best way to understand the difference.!
I read , I need full and clearly understand.
5. 2011-09-14, 12:36 AM#4
tanbao
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Re: What is difference RRC & RAB?
Originally Posted by forumuser-2008
I read , I need full and clearly understand.
It's better thay you read slowly, because it's so simple. Just share the knowledge
If you like my post reply and add reputation
6. 2011-09-14, 02:05 AM#5
forumuser-2008
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Re: What is difference RRC & RAB?
Originally Posted by tanbao
It's better thay you read slowly, because it's so simple.
So nobody wants to explain
7. 2011-09-14, 08:12 PM#6
plannerguy
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Re: What is difference RRC & RAB?
Hi
RRC is signalling part and RAB is Data part.
RRC is in layer3 and RAB is in between UE and CN.
RRC is part of control plane and RAB of user Plane.
Regards
Plannerguy
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9. 2011-09-15, 05:19 PM#7
forumuser-2008
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Re: What is difference RRC & RAB?
Originally Posted by plannerguy
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Hi RRC is signalling part and RAB is Data part. RRC is in layer3 and RAB is in between UE and CN. RRC is part of control plane and RAB of user Plane. Regards Plannerguy
Can we compare SDCCH Phase/TCH Phase with RRC/RAB?
10. 2011-09-22, 06:04 AM#8
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Re: What is difference RRC & RAB?
Dear,
RRC is the Radio Resource Control which works as the Control Plane in the Layer 3 .
It is basically used for signalling in UMTS.
It can be compared with GSM signalling part such as Immediate Assignment Process for
Allocating SDCCH Resource.
UMTS:- RRC Connection Success Rate
GSM:-Immediate Assignment Success Rate.
RAB:- Radio Access Bearer which works as the User plane for provide Data for User Request
Service.
for Each service which was requested by User there is only 1 RAB.
e.g. if user requested CS-AMR Call then 1 CS RAB will be generated and provided to user.
similarly for PS Call.
UMTS:-RAB Assignment Success Rate(RNC-CN)
GSM:-Assignment Success Rate(BSC-MSC)
BR//
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UMTS Basic concept - RB,RAB,SRB,AS,NAS,RRC Connection
UMTS Basic concept - RB,RAB,SRB,AS,NAS,RRC Connection
Posted October 20, 2012
Some of the basic terms which we use in telecom domain are RB(Radio Bearer),
SRB(Signalling Radio Bearer), RAB(Radio Access Bearer), AS (Access Stratum), NAS
(Non Access Stratum) and RRC connection. Lets try to understand these terms:
RRC connection exists when a UE goes through the connection establishment
procedure and has been allocated resources in the UTRAN and a U-RNTI. When RRC
connection get established, UE will also have some SRBs. Now whats the difference
between RRC connection and RB? RRC connection is like a railway track on which RB
is like carriages on the track.Carriage defines what kind of good will be dleivered and
in what quantity similarily RBs will define what kind of data goes on RRC. RB can
carry signalling or data.So for example if QoS gets changed then RB associated with
that RRC connection will need to reconfigured.
RAB is the combination of RB and the Iu bearer.
UE and CN (Core Network, MSC for circuit switched service, SGSN for packet
switched service) need to communicate with each other for various procedures. NAS
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protocols support the talk between UE and CN. It does not care below access
method (could be LTE, UTRAN, GSM/GPRS).
AS is a group of protocols that are specific to access network.
Now what is bearer: so its a logical connection between differnet nodes which make
sure that packets going through same bearer go through the same QoS. Each bearer
is associated with certain QoS parameters like Packet Delay, Packet loss etc so each
packet going through same bearer will have same QoS parameters.
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