patcat88
join:2002-04-05
Jamaica, NY
kudos:1 | reply to rradina
Re: Throttling? said by rradina:As I mentioned before, adding more and smaller cells seems to work for relatively stationary mobile users but there seem to be ever increasing complexities as cell counts, simultaneous connections and hand offs rise. Is this a case of most mobile calls are relatively stationary and therefore not that many calls have to consume bandwidth on multiple, adjacent cells? Not necessarily,
quote:
again in non-CDMA networks when the user behaviour changes, e.g. when a fast-travelling user, connected to a large, umbrella-type of cell, stops then the call may be transferred to a smaller macro cell or even to a micro cell in order to free capacity on the umbrella cell for other fast-travelling users and to reduce the potential interference to other cells or users (this works in reverse too, when a user is detected to be moving faster than a certain threshold, the call can be transferred to a larger umbrella-type of cell in order to minimise the frequency of the handoffs due to this movement);
»en.wikipedia.org/wiki/Handoff |
rradina
join:2000-08-08
Chesterfield, MO | That's a good idea. If the micro cells are on a different piece of spectrum, that would work really well.
The only thorn in this strategy is how well do "large cells" work in a city with lots of tall buildings? It's pretty easy to imagine how the every-street-corner micro cells work...there's always one within line-of-sight. Of course given the traffic in a big city, we need a definition of "fast travelling" user. |
