Re: [MEXT] Well-known problem with authentication/etc. in wirelessnetworks

Hi Raj,

On Fri, Aug 26, 2011 at 1:09 PM,  <[email protected]> wrote:
>
> Hi Julien,
>
> On 8/26/11 3:00 PM, "ext Julien Laganier" <[email protected]> wrote:
>
>>Hi Raj,
>>
>>On Fri, Aug 26, 2011 at 12:01 PM,  <[email protected]> wrote:
>>>
>>> Hi Charlie,
>>>
>>> On 8/26/11 1:38 PM, "ext Charles E. Perkins" <[email protected]>
>>>wrote:
>>>>
>>>>>> Thus I am still not sure what the problem is.
>>>>
>>>>
>>>>The problem is that they can't do very effective handovers.
>>>>Worse, they are designing _per-application_ handover systems.
>>>>This is wrong by most reasonable engineering standards,
>>>>regardless on the positive effect it might have for
>>>>standards junkies and permanent employment for engineers.
>>>
>>> Effective handovers between what networks? Handovers within the scope of
>>> an HSPA or LTE access for example work fine.
>>> If you are referring to handovers between 3G accesses and wifi (non-3GPP
>>> access) then yes.
>>> But the handover performance in such a scenario is hampered by other
>>> factors such as latency in connectivity and authentication etc.
>>
>>In the latter (handover between 3GPP and non-3GPP), given that the
>>source and target system are accessed by different radio systems, I do
>>not see handover performance has a factor hampering the usability or
>>desirability of the inter-system handover scheme in use.
>
> You mean the impact (in terms of lower performance) of handovers across
> 3GPP and non-3GPP handovers does not really matter because those
> applications that rely on high performing handovers will anyway not rely
> on such?

No I meant that because the MN has different radio systems, it can
turn one on and send a BU while still receiving/sending data via the
old one, and thus MIP handover performance isn't in a critical path in
that situation. For single radio the situation is obviously different.

--julien