Saturday, August 19, 2006

drop tail

It seems I dont really have to implement OVSF tree. I just to need concentrate on queue and simple bandwidth allocation.MIRAI-SF3.1 does not implement any queue in routers, switches and accesspoints. So I think my job would be implementing a drop tail queue that can be integrate in network components.I started off by making a simple queue in two nodes and using the MIRAI-SF3.1 simulator core libraries.Messages are transmiited between the two nodes.

Wednesday, August 09, 2006

OVSF

I just found out that when the mobile node is trying to connect to the base station. The basestation will allocate a code. This code is allocated from a binary tree called Orthogonal variable spreading factor (OVSF). It is a unique code that allows to differentiate each user on the same resource. It is like two persons talking to each other in a noisy and crowded area. Only the two persons can understand and hear each other because of them has the unique code that have been allocated. The people around of them only hear background noise.