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Tag: EPC (page 1 of 2)

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

Hitler Upset about LTE not having CS-Domain

Hitler is really upset about the omission of CS Domain in LTE ( EPC).

I am definitely with him. Who doesn’t love a couple of MSS & MGWs in the network.

I miss those MSCs, MSS and MGWs

Those E1s, T1s,  DDFs, jumper cables and Punching.

Those Trees and digit analysis

Pre and Post analysis

Routes and SS7 links

LAC & Cell definitions

But it is was meant to be my friend it was meant to be :(

But then  IMS will still have “parts” of CS-Domain.

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

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