[e2e] TCP over mobile networks: Are there any problems left?

[weigengyu]

Re: [e2e] TCP over mobile networks: Are there any problems left?
The mobility in a pico-cell based mobile networks affect the transmission rates 
and quality. This had proved in a PHS mobile networks.
In PHS network, the terminal would not permit to move faster than 20kilometer,
and one voice channel can support 64kbps digital transmission.

It can be estimate that there is the limitation due to terminal handoff in wlan--IEEE802.11 
based network, especially with more than 10M or 100M transmission rate. 

But I belive, researches or technical reports are required.

Gengyu 
  ----- Original Message ----- 
  From: András Veres (IJ/ETH) 
  To: end2end-interest at postel.org 
  Sent: Thursday, February 16, 2006 12:17 AM
  Subject: Re: [e2e] TCP over mobile networks: Are there any problems left?


  Mobility: handoffs may become quite frequent, e.g., once a minute. When the host goes between cells or APs, it has to reconnect, which may have some bad consequences. For example, there may be an outage time, or the available capacity in the target cell may be drastically different from the originating cell due to different technology or simply due to different traffic in the cells. Imagine a mobile with a download rate of 100Mbps entering a cell with just 10Mbps free capacity. Mobility may become also an issue in the fixed transport network, because traffic flows may be rerouted to different paths during mobility.

  Andras 
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