Mobile IP Procedures – Agent Discovery, Registration, Tunneling in Wimax Mobile IP Procedures Having Three Flow. Agent Discovery Registration Tunneling Agent Discovery Agent Discovery is the method by which a mobile node determines whether it is currently connected to its home network or to a foreign network, and by which a mobile node can detect … Read more
Angular Spread and Coherence Distance calculation for Wimax Calculation Angular Spread and Coherence Distance is very easy let’s see. So far, we have focused on how the channel response varies over time and how to quantify its delay and correlation properties. However, channels also vary over space. We do not attempt to rigorously treat all … Read more
IP Multicast Service Models Having Three Multicast Any-Source Multicast (ASM) Source-Filtered Multicast (SFM) and Source-Specific Multicast (SSM) which work as below. Any-Source Multicast (ASM) Destination ‘multicast’ address only defines ‘Group’ membership Will accept from ‘any source’ (unicast) First and oldest model, defined in RFC 1112 Source-Filtered Multicast (SFM) Destination ‘multicast’ address only defines ‘Group’ membership … Read more
DHCP – Dynamic Host Configuration Protocol DHCP server is configured with a range of addresses Host 3 boots up and enters Initialize state It broadcasts a DHCP Discover message Then enters Select state DHCP servers send DHCP offer message Host 3 sends a DHCP request to one of the servers Host 3 enters the Request … Read more
There are two ways to transmit training symbols: preamble or pilot tones. Preambles entail sending a certain number of training symbols prior to the user data symbols. In the case of OFDM, one or two preamble OFDM symbols are typical. Pilot tones involve inserting a few known pilot symbols among the subcarriers. Channel estimation in … Read more
The challenge to broadband wireless comes from the scarcity of radio-spectrum resources. Regulatory bodies around the world have allocated only a limited amount of spectrum for commercial use. The need to accommodate an ever-increasing number of users and offering bandwidth-rich applications using a limited spectrum challenges the system designer to continuously search for solutions that … Read more