Re: [802.19] Questions related to 11/59r0
We generated some comments to your questions below:
1) I'm not sure what you mean with slave mode II devices but my guess is that you refer to cases in which a mode II device acts under control of a master device (fixed or mode II) and doesn't control any further slave devices. No other device could depend on the operations and existence of such a slave mode II device and thus one wouldn't need to estimate their location either. So, we might need in the coexistence system ability for a CE/TVBD to indicate whether it serves as a master or a slave. This indication would determine whether the system needs to estimate location of slave devices. I hope my reply addresses your question.
2) You used spectrum sensing terminology to this problem. The question is now how to define miss detection and false alarm rate and at what SINR level. The following items have to be considered when talking about these terms:
- Mode I TVBD locations are not known. The worst case location for those are searched. If such TVBD does not exist in that location or in a location which really cause interference at that moment to another network, is it increasing false alarm rate?
- these two terms can be very dependent on the propagation model. The estimation of values for these two terms is very difficult when thinking simulation vs. a real world. One have to remember that most probably we are talking about even positive SINR values when thinking that TVBDs in two networks can cause interference to each other and to be defined as interferers. In primary spectrum sensing the SINR values are much smaller, even -14 dB or smaller.
Thank you for interest,
From: ext Tuncer Baykas [mailto:tbaykas@xxxxxxxx]
Sent: 20. kesäkuuta 2011 10:42
Subject: [802.19] Questions related to 11/59r0
Thank you very much for your presentations,
I checked your documents one more time. I have two questions.
1) According to my understanding, the system checks interference status for every mode II and fixed device and possible worst case mode
1 device. What is the reason behind checking interference status for slave mode II devices?
2) What are expected miss detection and false alarm rates for interference estimation?