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答复: The problem of media sense of 802.21



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.

 


发件人: Paine, Richard H [mailto:richard.h.paine@boeing.com]
发送时间: Tuesday, October 25, 2005 9:25 PM
收件人: CHEN, LIANG -HCHBJ
抄送: STDS-802-21@listserv.ieee.org
主题: RE: The problem of media sense of 802.21

 

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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