Reasons For 802.21
Cellular networks and 802.11 networks employ handover mechanisms for handover within the same network type (aka horizontal handover). Mobile IP provides handover mechanisms for handover across subnets of different types of networks, but can be slow in the process. Current 802 standards do not support handover between different types of networks. They also do not provide triggers or other services to accelerate mobile IP based handovers. Moreover, existing 802 standards provide mechanisms for detecting and selecting network access points, but do not allow for detection and selection of network access points in a way that is independent of the network type.
Read more about this topic: IEEE 802.21
Famous quotes containing the words reasons for and/or reasons:
“Write to the point: say immediately what you want to say most, even if it doesn’t “come first.” There are three reasons for doing this. First, you will then have said it, even if nothing else gets said. Second, your readers will then have read it, even if they read no more. Third, having said it, you are likely to have to say something more, because you will have to explain and justify what you chose to say.”
—Bill Stott (b. 1940)
“One of the many reasons for the bewildering and tragic character of human existence is the fact that social organization is at once necessary and fatal. Men are forever creating such organizations for their own convenience and forever finding themselves the victims of their home-made monsters.”
—Aldous Huxley (1894–1963)