Rajiv Bhardwaj - Official Blog

Category: Random Thoughts (page 1 of 10)

Random thoughts on random events

GTP Tunnel in CDMA

From: s v[mailto:SV@gmail.com]
Sent: Thursday, November 24, 2011 6:44 PM
To: Bhardwaj, Rajiv

Subject: Re: 1 qstn

one more

Can we use GTP in CDMA EVDO ? Why thr is only PMIP in case of CDMA and WiMAX ?

On Thu, Nov 24, 2011 at 1:29 PM, Bhardwaj, Rajiv  <rajiv.bhardwaj@xxx.com> wrote:

I don’t think that GTP can be used in CDMA EvDO.

 

But EPC can use GTP as well as PMIP & thus can support LTE, CDMA & Wi-max etc.

 

Yaar, I don’t have technical answer for the second part.

 

I believe CDMA was developed later than GPRS so it used the “latest’ protocol for the tunneling purpose i.e. PMIP.

 

When EPC was developed from GPRS it just upgraded the protocols from GTP1.0 to GTP2.0. and

 

Similarly CDMA developed the better version of PMIP & they keep using their own ‘legacy” protocols by adding new fields for better functionality……

On Thu, Nov 24, 2011 at 1:33 PM, s v <SV@gmail.com> wrote:

ok, so that means thr is no bearer identification possible in case of PMIP as it is using single tunnel for all Bearer, for uplink traffic its nt required bt hw it hapns in downlink?

From: Bhardwaj, Rajiv
Sent: Thursday, November 24, 2011 7:06 PM
To: ‘s@googlemail.com’
Subject: RE: 1 qstn

There is only one tunnel between SGW & PGW but inside the tunnel, data streams are for particular IPs i.e. Mobile IP, so it can be segregated.

From: s v[mailto:SV@gmail.com]
Sent: Thursday, November 24, 2011 7:07 PM

To: Bhardwaj, Rajiv
Subject: Re: 1 qstn

i think for downlink TFT will cum in picture and will do mapping based on TED’s. is it?

On Thu, Nov 24, 2011 at 1:38 PM, Bhardwaj, Rajiv  <rajiv.bhardwaj@xxx.com> wrote:

But there is only one Tunnel end point address……

From: s v[mailto:SV@gmail.com]
Sent: Thursday, November 24, 2011 7:25 PM

To: Bhardwaj, Rajiv
Subject: Re: 1 qstn

oh Sorry typo mistake-
i think for downlink TFT will cum in picture and will do mapping based on packet filters for each bearers . is it?

From: Bhardwaj, Rajiv
Sent: Thursday, November 24, 2011 7:25 PM
To: ‘sv@googlemail.com’
Subject: RE: 1 qstn

No idea.

 

I think Mobile IP should be enough to separate traffic….

From: s v [mailto:sv@gmail.com]
Sent: Thursday, November 24, 2011 7:29 PM
To: Bhardwaj, Rajiv
Subject: Re: 1 qstn

chk tis, fst 2 r GTP nd last one is PMIP based

 

 

 

From: Bhardwaj, Rajiv
Sent: Thursday, November 24, 2011 7:31 PM
To: ‘s v@googlemail.com’
Subject: RE: 1 qstn

Okay..

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

Jugni

Its the Best “Jugni” i have ever heard. Awesome!! Great initiative by Coke Studios.

Recently was discussing with a friend how new singers end up portraying Jugni as a woman.  But then its their style, i don’t mind.

Meesha is a pleasure to hear as well as watch (despite my hatred towards size zero). Really liked the way she sang. Liked the way she pronunced ਦੁਣੀਆ.. ਜੁਗਣੀ.

Specially liked the way she was looking at Aarif lohar at 3:58. Maybe was thinking “ਆਹ ਕੀ ਚੀਜ਼ ਆ ? ਗੋਲੂ ਮੋਲੂ ਪਪਲੂ ਟਾਈਪ ” :)

Aarif lohar doesn’t need my words he has a great legacy.

I am not sure if three birds at the last branch were that good at singing but they definitely made the video a pleasure to watch.

Loved this song, although my friends didn’t like my singing attempt at “Dum Ghutkoon”.

But who cares. Dum Ghutkoon, Dum Ghutkoon..

Installing Excel Addins

To install an add-in to Microsoft office excel.

1.   First move the add-in file (“.xla” or “.xll” ) to default add-ins folder. Which is usually “userfolder”\Application Data\Microsoft\AddIns.

“userfolder” is the folder with your username.

For windows XP, it is in documents & settings folder. So you will find the addins folder at

C:\Documents and Settings\[UserName]\Application Data\Microsoft\AddIns

where username is your computer user name.

For Windows Vista & later it is usually

C:\Users\[User Name]\AppData\Roaming\Microsoft\Addins

In most cases you can find correct folder by typing %AppData%\Microsoft\Addins into the “Run” and hitting enter.

You may also have a separate folder for Add-ins, in that case you can copy the addin file to that folder.

2.  For Excel 2003 or older, go to addins menu by selecting Tools->Add-ins.

3.  Then choose the desired add-in from list.  Add-in will appear in the list if you have copied it to the right Add-in folder as described in step 1.

4. If Add-in is not displayed in the list then you can use the browse button to locate the Add-in File.

For Office 2007 or later:

1.   First move the add-in file (“.xla” or “.xll” ) to default add-ins folder. Which is usually “userfolder”\Application Data\Microsoft\AddIns.

“userfolder” is the folder with your username.

For windows XP, it is in documents & settings folder. So you will find the addins folder at

C:\Documents and Settings\[UserName]\Application Data\Microsoft\AddIns

where username is your computer user name.

For Windows Vista & later it is usually

C:\Users\[User Name]\AppData\Roaming\Microsoft\Addins

In most cases you can find correct folder by typing %AppData%\Microsoft\Addins into the “Run” and hitting enter.

You may also have a separate folder for Add-ins, in that case you can copy the addin file to that folder.

2. Click on the Office button in top left corner.

3. Then choose excel options.

4.  Select  “Add-ins” , choose Manage “Excel Add-ins” and click Go.

5.  Then choose the desired add-in from list and click OK.  Add-in will appear in the list if you have copied it to the right Add-in folder as described in step 1.

6. If Add-in is not displayed in the list then you can use the browse button to locate the Add-in File.

7. If Add-in is correctly installed then it may show a relevant message.

8. Once installation is complete then you can see the “compatible” add-ins in the Add-ins tab of office ribbon. (Optional)

9. There you can select the properties and extra functionalities of the installed Add-in. (Optional)

Last 2 steps are optional and may not be available for all Add-ins.

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