RADIUS Protocol Stack in Wimax

RADIUS Protocol Stack in Wimax The RADIUS protocol stack in WiMAX is a vital authentication and authorization framework, facilitating secure access and management of WiMAX network resources. RADIUS is a protocol that enables a single server to become responsible for all remote access authentication, authorization, and auditing (or accounting) services. RADIUS functions as a client/server … Read more

What are IP Multimedia Subsystem IMS and IMS Structure

IMS means IP Multimedia Subsystem is an essential part of the all-IP UMTS architecture and Relevant for WiMAX for the same usage and also for WiMAX to UMTS Interworking. This is part of the WiMAX Forum architecture. IP Multimedia Subsystem (IMS) is a Service Delivery Architecture and standardized architecture to provide Internet Protocol (IP)-based mobile … Read more

IP Multicast Service Models – Dense and Sparse Modes

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

Multicast Advantages and Disadvantages

When sending the same data to multiple receivers, rather than send multiple copies all the way from sender to all the receivers, just send one copy and duplicate where paths diverge Better bandwidth utilisation Less host/router processing Receivers’ addresses may be unknown A possible thing to use for IPTV over WiMAX. Multicast Advantages Enhanced Efficiency: … Read more

Mobile IP Procedures – Agent Discovery, Registration, Tunneling in Wimax

Mobile IP Procedures – Agent Discovery, Registration, Tunneling in Wimax 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 … Read more

Multicast Forwarding Advantage and disadvantage in Short

Here I write in short Advantages and disadvantages of Multicast Forwarding. Multicast Routing is backwards from Unicast Routing Unicast Routing is concerned about where the packet is going or will need to go. Multicast Routing is concerned about where the packet came from or will be coming from. Multicast Routing uses “Reverse Path Forwarding” (RPF) … Read more

Mobile IP and Mobile IP Terminology

If a mobile device moves to a new network and keeps the same IP address, the address will not reflect its new location therefore routers will be unable to route datagram to it correctly (or at all). Alternatively, if a mobile device moves to a new network and gets allocated a new address, already established … Read more

Why IP Addresses? Why private and public both IP address needed?

IP Networks use Routers to do the switching based on IP addresses, Layer 3 routing protocols like BGP or OSPF an Ethernet networks use 48 bit MAC addresses Spanning Tree is used to route because users, base stations, routers, etc will all need IP addresses (It is an IP-based system) There are Public (Internet routable) … Read more

Adaptive Modulation and Coding (AMC) in WIMAX

Set of modulation/coding schemes QPSK, 16QAM, 64QAM distributed over one sector: SINR distribution automatic selection mechanisms Maximum throughput per sector Highest modulation scheme Lowest coding protection Mean throughput offered per sector Contribution of different modulations Average over the area AMC is a link adoption (LA) method to adapt the transmission parameters to take advantage of … Read more