doc.: ieee 802.11-11/0804r1 submission may 2011 shusaku shimada 1 functional requirements for...
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May 2011
Shusaku Shimada1
doc.: IEEE 802.11-11/0804r1
Submission
Functional Requirements for Installation and Deployment related aspects
Date: 2011-5-24
Name Affiliations Address Phone email
Shusaku Shimada Yokogawa Co. 2-9-32 Nakacho
Musashino-shi, Tokyo 180-8750 Japan
+81-422-52-5558 [email protected]
Authors:
Note: This document is identical to Doc-11-11/0804r0 except for using ppt file format.
May 2011
Shusaku Shimada2
doc.: IEEE 802.11-11/0804r1
Submission
Summary
In order to help creating 11ah FR/EC document, this submission
manifests a few requirements for reliable deployment and installation
of sensor network, which should be common in all usecase 1 and 2;
(1) To enhance the link reliability by circumventing the obstacles in
over-the-air propagation path, an AP-side site diversity helps if any
proper margin of GI (CP) is ensured to avoid undesired beamforming
and serious black out area as the side effect.
(2) Similar to the site diversity, a radiating (leaky) coaxial cable (LCX)
and a passive repeater may help for sensor network deployment where
any impediment of coverage by usual AP allocation exists.
“Functional requirement for Easy deployment ;
Capability to utilize AP-side site diversity, LCX, and passive repeater”
May 2011
Shusaku Shimada3
doc.: IEEE 802.11-11/0804r1
Submission
Site diversity (or Off site MIMO)
May 2011
Shusaku Shimada4
doc.: IEEE 802.11-11/0804r1
Submission
Long GI enabling Site Diversity (or Off site MIMO)
AP
Sensor
Remotepart of AP
ObstacleOccultation
Off site antenna
Co-locatedMIMO antenna
Any of ;(1) Remote Ant.(2) Remote RF(3) Remote synchronized AP
May 2011
Shusaku Shimada5
doc.: IEEE 802.11-11/0804r1
Submission
Required GI length
• If typical AP coverage radius is assumed 500 m,
→ Propagating time = 1.66 uS GI >= 3.2 uS at least.
• If maximum AP coverage radius of 1 km is assumed,
→ Propagatio time = 3.33 uS preferable GI >= 6.4 uS
++ Because 11ah have no legacy compatibility issue,
→ CSD (Cyclic Shift Diversity) should span fully over GI value above.
May 2011
Shusaku Shimada6
doc.: IEEE 802.11-11/0804r1
Submission
Leaky coaxial cable (LCX) and passive repeater
May 2011
Shusaku Shimada7
doc.: IEEE 802.11-11/0804r1
Submission
Long GI enabling LCX and Passive repeater
AP
Sensor
ObstacleOccultation
Passive repeater
Co-locationof
MIMO antenna
ObstacleWall
May 2011
Shusaku Shimada8
doc.: IEEE 802.11-11/0804r1
Submission
Required 11ah MIMO behavior
• Degenerated channel by LCX or passive repeater may appear
→ Adaptive to “poorly multipath but faded” channel.
• CSD still has to work,
→ Propagation time of LCX or Passive repeater <= 1 uS (200 m) ( additional )
++ The room for RF-chain/antenna calibration may be affected.
May 2011
Shusaku Shimada9
doc.: IEEE 802.11-11/0804r1
Submission
End