Subject: RE: [Seamoby] My opinion about CARD

From: [email-masked]
Date: Mon, 2 Dec 2002 10:07:05 -0500

Hi,
 
We went through the phase of problem statement and requirement for quite a while. Re-iterating such "opinion" discussions
simply prevents us from going after the solutions. We had discussions on use cases, integration in mobility protocols, and so forth, but
I did not see your opinion at that time. As for now, we are in the phase of building a solution for something that had been identified as
indeed being necessary. 
 
Dirk

-----Original Message-----
From: ext Xiaoming Wang [mailto:[email-masked]]
Sent: Friday, November 29, 2002 8:13 PM
To: Eunsoo Shim; [email-masked]
Subject: Re: [Seamoby] My opinion about CARD

Thank you. I agree with you that there exist cases where we can use CARD. But is it enough for a protocol? Is it necessary to improve handoff performance? 
I think we use a protocol to solve a common problem, not special cases. 
 
From draft-ietf-seamoby-card-protocol-00.txt, we can see there are a lot of different cases (MN types and TAR selection algrithm location) it should take into consideration. It is difficult for a protocol to include all the cases. So why not leaving it to implement consideration and solving it case by case?
 
Above is my humble opinion. And I'm sorry for bringing noise into this community. But I want to clear my mind. And I think it can help me to know what we should do and why we should do it.
 
Xiaoming Wang

----- Original Message ----- 
From: Eunsoo  <mailto:[email-masked]> Shim 
To: Xiaoming Wang <mailto:[email-masked]>  ; [email-masked] 
Sent: Friday, November 29, 2002 5:07 AM
Subject: Re: [Seamoby] My opinion about CARD

Hi, Xiaoming,
 
Depending on the cell structure/topology, there can be multiple CARs in handoffs. Also in wireless overlay networks, there are multiple CARs typically.
The CAR discovery issue draft describes some of the cases the CARD protocol is useful for. You can see that the CARD protocol is useful not only for FMIP. So the requirements draft says the CARD protocol should be independent of any mobility management protocol.
Regards,
 
Eunsoo

----- Original Message ----- 
From: Xiaoming Wang <mailto:[email-masked]>  
To: [email-masked] 
Sent: Wednesday, November 27, 2002 8:07 PM
Subject: [Seamoby] My opinion about CARD

Hi all, 
 
I only can see a few situations where CARD can be used. In most cases, handover only involves one CAR. So is CARD enough to be a protocol? IMHO it is better to integrate it in other mobility protocols such as FMIP since it is not common for all cases. 

Xiaoming Wang
=========================================================
Network Protocol Technical Group, i-Networking lab
Samsung Advanced Institute of Technology, South Korea
 
Phone: 82-31-280-9615
Fax:     82-31-280-9569
EMail:   [email-masked] (preferred)
            [email-masked]
=========================================================

---

From: [email-masked]
Date: Mon, 2 Dec 2002 10:07:05 -0500

Hi,

Dirk

-----Original Message-----
From: ext Xiaoming Wang [mailto:[email-masked]]
Sent: Friday, November 29, 2002 8:13 PM
To: Eunsoo Shim; [email-masked]
Subject: Re: [Seamoby] My opinion about CARD

 
 
Xiaoming Wang

----- Original Message ----- 
From: Eunsoo  <mailto:[email-masked]> Shim 
To: Xiaoming Wang <mailto:[email-masked]>  ; [email-masked] 
Sent: Friday, November 29, 2002 5:07 AM
Subject: Re: [Seamoby] My opinion about CARD

Hi, Xiaoming,

Eunsoo

----- Original Message ----- 
From: Xiaoming Wang <mailto:[email-masked]>  
To: [email-masked] 
Sent: Wednesday, November 27, 2002 8:07 PM
Subject: [Seamoby] My opinion about CARD

Hi all, 

Xiaoming Wang
 
Phone: 82-31-280-9615
Fax:     82-31-280-9569

---

From: Singh Ajoy-ASINGH1 <[email-masked]>
Date: Mon, 2 Dec 2002 14:27:56 -0600

Hello Xiaoming Wang,
Please find my inline reply.
Regards,
Ajoy

-----Original Message-----
From: Xiaoming Wang [mailto:[email-masked]]
Sent: Friday, November 29, 2002 7:13 PM
To: Eunsoo Shim; [email-masked]
Subject: Re: [Seamoby] My opinion about CARD

From draft-ietf-seamoby-card-protocol-00.txt, we can see there are a lot of different cases (MN types and TAR selection algrithm location) it should take into consideration. 

AJOY-> In the proposed draft, we have identified various scenarios of CARD deployment. This does not mean 
that we will define multiple protocols for CARD.  
 
 It is difficult for a protocol to include all the cases. 

AJOY-> Why do you think it is difficult to solve all the proposed cases using 
single protocol. Could you please elaborate? 
 
 So why not leaving it to implement consideration and solving it case by case?
 
AJOY-> There will be changes between MN-AR as well as AR-AR interface. So,
I am not sure how can we leave this as implementation consideration?
 
Above is my humble opinion. And I'm sorry for bringing noise into this community. 

AJOY-> Your comments are appreciated. 
 
 But I want to clear my mind. And I think it can help me to know what we should do and why we should do it.
 
Xiaoming Wang

----- Original Message ----- 
From: Eunsoo  <mailto:[email-masked]> Shim 
To: Xiaoming Wang <mailto:[email-masked]>  ; [email-masked] <mailto:[email-masked]>  
Sent: Friday, November 29, 2002 5:07 AM
Subject: Re: [Seamoby] My opinion about CARD

Hi, Xiaoming,

Eunsoo

----- Original Message ----- 
From: Xiaoming Wang <mailto:[email-masked]>  
To: [email-masked] <mailto:[email-masked]>  
Sent: Wednesday, November 27, 2002 8:07 PM
Subject: [Seamoby] My opinion about CARD

Hi all, 

Xiaoming Wang
 
Phone: 82-31-280-9615
Fax:     82-31-280-9569
EMail:   [email-masked] <mailto:[email-masked]>  (preferred)
            [email-masked] <mailto:[email-masked]> 
=========================================================

---

From: Singh Ajoy-ASINGH1 <[email-masked]>
Date: Mon, 2 Dec 2002 14:27:56 -0600

Hello Xiaoming Wang,

-----Original Message-----
From: Xiaoming Wang [mailto:[email-masked]]
Sent: Friday, November 29, 2002 7:13 PM
To: Eunsoo Shim; [email-masked]
Subject: Re: [Seamoby] My opinion about CARD

 

 

 
 
Xiaoming Wang

----- Original Message ----- 
From: Eunsoo  <mailto:[email-masked]> Shim 
To: Xiaoming Wang <mailto:[email-masked]>  ; [email-masked] <mailto:[email-masked]>  
Sent: Friday, November 29, 2002 5:07 AM
Subject: Re: [Seamoby] My opinion about CARD

Hi, Xiaoming,

Eunsoo

----- Original Message ----- 
From: Xiaoming Wang <mailto:[email-masked]>  
To: [email-masked] <mailto:[email-masked]>  
Sent: Wednesday, November 27, 2002 8:07 PM
Subject: [Seamoby] My opinion about CARD

Hi all, 

Xiaoming Wang
 
Phone: 82-31-280-9615
Fax:     82-31-280-9569