etc:drafts:epmnets_review
Differences
This shows you the differences between two versions of the page.
Both sides previous revisionPrevious revisionNext revision | Previous revision | ||
etc:drafts:epmnets_review [2009/12/01 22:47] – udv | etc:drafts:epmnets_review [2009/12/01 22:54] (current) – udv | ||
---|---|---|---|
Line 57: | Line 57: | ||
WiFi’s disadvantages include: | WiFi’s disadvantages include: | ||
- | * its use of the 2.4GHz spectrum, which is | + | * its use of the 2.4GHz spectrum, which is susceptible to interference. |
- | susceptible to interference. | + | * Its higher energy consumption when compared to other standards. |
- | * Its higher energy consumption when | + | |
- | compared to other standards. | + | |
**WiMAX** | **WiMAX** | ||
Line 116: | Line 114: | ||
cially, assuming that the 802.16e network is always reachable anytime and | cially, assuming that the 802.16e network is always reachable anytime and | ||
anywhere,2 we just pay attention to the way how to find WLAN APs. | anywhere,2 we just pay attention to the way how to find WLAN APs. | ||
+ | |||
+ | - ...mobile station (MSTA) always monitors the availability of nearby WLAN APs by attempting to detect the WLAN signal. | ||
+ | - ...an MSTA moves only within a specific region, where at least one of WLAN APs is reachable | ||
+ | |||
+ | ...keeping the scan operation of WLAN without any guideline can be practically | ||
+ | a bad idea in that MSTA is usually battery-powered. Since WLANs are of- | ||
+ | ten deployed for hotspot services with spotty service coverages, keeping the | ||
+ | WLAN interface turned on could often mean an inefficient use of energy [8]. | ||
+ | |||
+ | A straightforward approach to resolving this issue is to make the MSTA | ||
+ | informed of the existence of WLAN APs directly by the network side instead | ||
+ | of relying solely on the individual scan operation of MSTA. | ||
+ | |||
+ | We propose a WLAN scanning algorithm, which uses the | ||
+ | baseline scanning protocol specified by IEEE 802.11 standard [11] without | ||
+ | an additional terminal module like GPS and enables the MSTA to manage | ||
+ | the WLAN interface without human intervention. Especially, the proposed | ||
+ | algorithm can statistically guarantee the scanning time needed until at least a WLAN AP is found. |
etc/drafts/epmnets_review.1259696831.txt.gz · Last modified: 2009/12/01 22:47 by udv