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Tag: Telecom

EPC Control Plane

From: s v[mailto:SV@gmail.com]
Sent: Wednesday, November 23, 2011 4:44 PM
To: Bhardwaj, Rajiv
Subject: 1 qstn

On what interface in LTE, Control Plane SCTP over IP and UDP over IP is used and Why?

On Wed, Nov 23, 2011 at 11:22 AM, Bhardwaj, Rajiv  <rajiv.bhardwaj@xxx.com> wrote:

Because control plane needs more reliability so it uses S1AP over SCTP.

User plane can use less reliable i.e UDP

It was same in 3G

RANAP over SCTP for control

&

GTP over UDP for User

From: s v[mailto:SV@gmail.com]
Sent: Thursday, November 24, 2011 5:02 PM
To: Bhardwaj, Rajiv

Subject: Re: 1 qstn

thn why S10 is over UDP? like all other contro plane interfaces like S11, S5/S8, S3/S4 all are UDP not SCTP..

On Thu, Nov 24, 2011 at 11:37 AM, Bhardwaj, Rajiv  <rajiv.bhardwaj@xxx.com> wrote:

All these interfaces have control information but they are just used to create the GTP tunnels.

So there is no “special” control information but just the bearer establishment. So it can be called control plane but it is only control information for creating tunnel for user data. So its more or less part of the user data.

While RANAP has real control information like LUP, attach, ciphering etc.. This information is critical & is needed even if there is no user data. But remaining interfaces only work when there is some user data.

On Thu, Nov 24, 2011 at 11:46 AM, s v <SV@gmail.com> wrote:

hmm banda ghaint hai tu… thanks

EPC Control Plane

From: s v[mailto:SV@gmail.com]
Sent: Wednesday, November 23, 2011 4:44 PM
To: Bhardwaj, Rajiv
Subject: 1 qstn

On what interface in LTE, Control Plane SCTP over IP and UDP over IP is used and Why?

On Wed, Nov 23, 2011 at 11:22 AM, Bhardwaj, Rajiv  <rajiv.bhardwaj@xxx.com> wrote:

Because control plane needs more reliability so it uses S1AP over SCTP.

User plane can use less reliable i.e UDP

It was same in 3G

RANAP over SCTP for control

&

GTP over UDP for User

From: s v[mailto:SV@gmail.com]
Sent: Thursday, November 24, 2011 5:02 PM
To: Bhardwaj, Rajiv

Subject: Re: 1 qstn

thn why S10 is over UDP? like all other contro plane interfaces like S11, S5/S8, S3/S4 all are UDP not SCTP..

On Thu, Nov 24, 2011 at 11:37 AM, Bhardwaj, Rajiv  <rajiv.bhardwaj@xxx.com> wrote:

All these interfaces have control information but they are just used to create the GTP tunnels.

So there is no “special” control information but just the bearer establishment. So it can be called control plane but it is only control information for creating tunnel for user data. So its more or less part of the user data.

While RANAP has real control information like LUP, attach, ciphering etc.. This information is critical & is needed even if there is no user data. But remaining interfaces only work when there is some user data.

On Thu, Nov 24, 2011 at 11:46 AM, s v <SV@gmail.com> wrote:

hmm banda ghaint hai tu… thanks

Compensation in Indian Telecom Industry

We have received & sent many SMS jokes about this but its time to think more seriously about it. Jobs in Telecom sector are critical in nature. By critical I mean…

  1. Problems in system need to be attended immediately. Night visits are very common.
  2. Even a small mistake can cause revenue loss in Crores of rupees.
  3. Large number of customers is affected by even a single equipment failure. So very high quality equipment maintenance is needed.
  4. On festivals and other holidays, Calls are more than average so, engineers need to be in office. Diwali & New Year eve are too important to stay at home and enjoy.

Telecom sector is booming in India right now. Despite all this, compensation packages of telecom engineers are not as good as IT\Software engineers. Also IT\Software companies provide other benefits like gym, swimming pool, etc but not telecom companies.

This is puzzling me from quite some time now. What can be the reason (s) for this?

Take a quick poll at http://pendu.in/viewtopic.php?t=10

Dual-Homing and all the Fuzz !

There was lot of fuzz about dual-homing feature in R4 CN. Today finally we made a plan to implement it. But guess what, it ‘s extremely over rated. What is dual-homing? ……In short we can say that with dual-homing we provide a backup MSCS for 1 or more MGWs. Thats all we need to say.

But…

  1. This Active/standby (backup) mechanism will not work if there is connectivity loss between MGW & MSCS.
  2. Also if one of the peer entity’s connectivity with currently active MSCS goes down, it will not be automatically accessible from standby MSCS.

All in all poor Active/Standby or backup mechansim.

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