By Mustafa Ergen
This e-book addresses the rising expertise for Orthogonal Frequency department a number of entry (OFDMA), overlaying OFDMA actual layer in addition to community know-how. The publication additionally comprises info on IEEE 802.16e and WiMAX networks and in addition bargains a comparability with different OFDMA technologies.
OFDMA is the quickest turning out to be sector within the instant industry, and the spine of platforms utilized in WiMAX. WiMAX is the know-how that allows instant clients to speak at any time from any situation with no need to discover a WiFi hotspot.
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Additional info for Mobile Broadband - Including WiMAX and LTE
N), according to the key key and a series quantity from domestic Subscriber Server (HSS). 3GPP AAA server shops the authentication vector: XRES (expected response), AUTN (authentication value), CK (ciphering key), and IK (integrity key). Then, AAA server transmits AKA-challenge together with RAND (random number), AUTN to the USIM in supplicant. The USIM calculates the RES, CK, IK, and series quantity (SQN). SQN is maintained at HSS and USIM and never published to the community. USIM transmits RES (result) to 3GPP AAA server for comparability with XRES – to authenticate itself – but additionally assessments the computed worth of the SQN with its personal model to authenticate the community to itself. three. 14 cellular IP ninety five Supplicant Authenticator 3GPP AAA Server HSS (HLR/ AuC) EAP request / id EAP response/identity [NAI in line with temp identification or IMSI] EAP reaction/ identification [NAI in accordance with temp identification or IMSI] Subscriber entry profile request Subscriber entry profile reaction Authentication facts request (IMSI) Authentication facts reaction (AV(1... n)) EAP request /AKA-challenge [RAND, AUTN, Encrypted temp. identification. ] EAP reaction /AKA-challenge [RES] EAP request /AKA-challenge [RAND, AUTN, Encrypted temp. identification. ] EAP reaction /AKA-challenge [RES] EAP good fortune evaluate RES and XRES EAP luck keying fabric Derive CK(i) and IK(i) Fig. three. 12 EAP-AKA IK is used to authenticate the signaling messages among cellular and community and CK is used to encrypt the knowledge over the air. additionally IMSI encryption is played before everything reference to a bunch key and P-TMSI (Packet transitority cellular Subscriber Identifier) is first used to avoid IMSI being captured for malicious use and impersonation of clients. three. 14 cellular IP cellular IP16 is designed via net Engineering job strength (IETF) to permit cellular subscribers to maneuver from one community to a different whereas protecting an everlasting IP tackle to keep up using assets and prone at the stream. The packets in web are routed to the community the subscriber’s IP tackle belongs. to take care of the seamless roaming, domestic Agent (HA) entity is brought in the house community. cellular subscriber (MS), while leaves the community, initiates a binding request to its domestic Agent through overseas Agent (FA) living within the visited community. overseas Agent advertises a care-of tackle (CoA) within the visited community and hyperlinks the cellular subscriber’s domestic tackle (HoA) to the CoA by means of sending a binding request. sixteen cellular IPv4 is defined in IETF RFC3344, and updates are extra in IETF RFC4721. cellular IPv6 and IPSec to guard cellular IPv6 are defined in IETF RFC3775 and IETF RFC3776 respectively. ninety six three fundamentals of All-IP Networking D:122. three. 2. 2 S:128. 6. 1. 2 web domestic community 128. 6. zero. zero (128. 6. 255. 2) opposite Tunneling domestic Agent Correspondent Node (122. three. 2. 2) D: 128. 6. 1. 2 S: 122. three. 2. 2 path Optimization D:192. three. 2. five S:128. 6. 10. 2 D: 128. 6. 1. 2 S: 122. three. 2. 2 D:128. 6. 255. 2 S:192. three. 2. five S:128. 6. 1. 2 D:122. three. 2. 2 international Agent Visited entry provider community (192. three. 2. zero) Direct Uplink path (192. three. 2.