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--- etc:drafts:epmnets_review [2009/12/01 22:39] – udv
+++ etc:drafts:epmnets_review [2009/12/01 22:54] (current) – udv
@@ Line 1: / Line 1: @@
 ==== EPM in WLAN paper analysis ====
-====== article 1. Investigating Depth-Fanout Trade-Off in WiMAX Mesh Networks ======
+====== Article 1. Investigating Depth-Fanout Trade-Off in WiMAX Mesh Networks ======
 In a more recent release WiMAX (IEEE 802.16d),the standard has been extended, introducing the mesh mode to let Subscriber Stations (SSs) communicate through multi-hop transmissions. In its basic version, the mesh mode relies on a centralized approach that organizes all the nodes of a WiMAX network in a tree structure rooted at a particular node, namely the Base Station (BS).
@@ Line 42: / Line 42: @@
 The overall bitrate on some long links would be better if they are split, in other words, if the communications between sources and destinations on these links utilize intermediate SSs to rely their data.
-===== article 2. Hybrid WiFi-WiMAX Network Routing Protocol =====
+===== Article 2. Hybrid WiFi-WiMAX Network Routing Protocol =====
 Comparsion of WiFi and WiMAX
@@ Line 56: / Line 57: @@
 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**
@@ Line 102: / Line 101: @@
 The algorithm is based on the Ad-hoc On Demand Distance Vector (AODV) protocol modeled in OPNET. The following scenario presents a node that functions as a BS/AP gateway.
+===== Article 3. Energy-aware WLAN scanning inintegrated IEEE 802.16e/802.11networks =====
+Vertical handoff (VHO), i.e., handoff across heterogeneous access
+networks, is considered a key feature to bring the next-generation wireless
+communication era. Especially, along with the introduction of the 802.16e
+service,1 the interworking with WLANs, of which a commercial service has
+been operational for years, also attracts great interests.
+Many of challenging issues are involved in VHO: target network discovery;
+VHO decision criteria; efficient IP-layer protocols for mobility management,
+and so on [7]. We in this paper focus on finding target networks. Espe-
+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.
+  -  ...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.