Dear
Richard,
Thanks
for your immediate
reference to the recent related works in 802.11 WG. 11k mainly focuses
on
the intra-handover decision within the 802.11 network. In such kind of
network, we can suppose AP are connected together by the same ISP, and
the
roaming STA shares the same IP address within same sub-network.
However, the
problem is a little different in the heterogeneous scenario, which, besides
the signal strength and others, requires the target network to
establish the
agreement with the home network. So, I want to survey how 802.21
members
formulate the emerging problem as well as their contributions.
Best regards,
Liang
Chen
Tel:
(8610) 65908111 ext 3054, Fax: (8610) 65908179
Hitachi(China)
Research and Development
Corp.
R.1701,
Beijing
Fortune Building,
Chaoyang District,
Beijing, China, 100004.
Liang,
there has been some work in 802.11k on medium sense, but it
was rejected by the 802.11 Working Group. There was an 11k
measurement called Medium Sensing Time Histogram. If you have access
to
802.11 archives, you can get 11k draft 2.0 that still contains the
measurement. In the present draft of 11k (D3.0), there is a Noise
Histogram that measures the non-802.11 noise over time.
Richard
H.
Paine
Success
is getting what
you want, happiness is liking what you get!
Cell: 206-854-8199
IPPhone: 425-373-8964
Email: richard.h.paine@boeing.com
From: CHEN,
LIANG -HCHBJ
[mailto:lchen@hitachi.cn]
Sent: Monday, October
24, 2005
12:45 AM
To:
STDS-802-21@listserv.ieee.org
Subject: The problem
of media
sense of 802.21
Dear all,
I am a
researcher in China
working for the handover issue and also a new to the 802.21 community.
I
understand that the goal of 802.21 is to provide the integrated
wireless
networking service among 3G, 2G, WiFi, WiMax, etc., without the
interruption of upper layer applications. So it should be an issue to
detect the available wireless network before the handover. And the
necessary information to be probed in advance might include the signal
strength, bandwidth, price and the accessibility between the new
network and
the current used network.
Due to my
insufficient
cultivation in the 802.21 communication, could anyone here show me your
pervious work on the topic of media sense please?
Thanks!
Best regards,
Liang Chen
Tel: (8610) 65908111 ext 3054, Fax: (8610)
65908179
Hitachi(China)
Research and Development
Corp.
R.1701, Beijing
Fortune Building, Chaoyang
District,
Beijing, China, 100004.
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