IGWSInstitute for Gender and Women's Studies (Egypt)
IGWSIt Goes Without Saying
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References in periodicals archive ?
* Note that, as an MN leaves the network, the serving MR announces the MN's leaving to the primary IGW, which, in turn, updates its database and distributes this information to all DRs via the distribution tree and to IGWs in its multicast group.
To maintain the locations of MNs inside mesh networks, IGWs store the mappings between MNs and MRs in the form of tuples [MN_MAC, Mesh_ID, MN_IP].
In our multi-homed WMN, IGWs exchange routing information with each other via wired links and decide which MRs they will take care of.
In the proposed solution, IGWs join a multicast group in which they exchange information with each other via wired backbone links.
This paper presents an architecture in which IGWs negotiate with each other via wired links to decide which MRs they will serve; the decision is made relying on the link quality from MRs to IGWs.
The authors of [9] designed an architecture with multiple MANET border gateways (MBGs), but the number of MBGs working as IGWs was kept minimized, usually at one.
For load balancing purposes, the authors of [6] proposed a method to achieve load balancing in WMNs based on the average queue length in IGWs. Furthermore, Thomas et al [7] implemented the cross-layer metric to provide an improved load-balanced wireless mesh network with multi-homing.
IP-in-IP encapsulation is also used but between MRs and IGWs and between IGWs.
In this proposed solution, traffic can go on its optimal path when the original IGW receives and updates the MN's new location.
6), this MR is either served by the IGW of the former MR or by another IGW.
When an NR recognizes an MN's attachment, it will send a query to the nearest DR to get the previous MN's location as well as an appropriate IGW. There are three possible cases: the NR is a DR, so it gets information from itself (1); if the NR is different from the DR, the query message will travel from the NR to a DR at a one-hop (2) or two-hop distance (3).
From the point of view of the IGW, to cover 3 routers at rank 2, we need 2 routers at rank 1; to cover 4 routers at rank 3, we need 2 routers at rank 2 because each router has only 2 connections to the outside.