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If you're picking up a saxophone for the first time or are looking to brush up on your skills, Saxophone For Dummies gives you everything you need to appreciate, understand, and excel at pla…Descripción completa
Descripción: Libro de texto del Audio Set de Japanese for Dummies
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Learn all about the uses of Session Border Controllers (SBC's) including topology hiding, transcoding, digit and parameter manipulation, NAT. Protesting your network from DoS attacks. SIP.Full description
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entertain your friends, families and loved ones with this easy to learn magic tricks! great for your kid's parties, family gathering and even simple entertainment for your friends wherever you are.
If you're picking up a saxophone for the first time or are looking to brush up on your skills, Saxophone For Dummies gives you everything you need to appreciate, understand, and excel at pla…Full description
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Trig
Introduction Evolution of Cellular technology LTE air interface capabilities LTE standards
Network Structure Basic components and their functions EPC and various interfaces
Protocol stack User plane Control plane EPS NAS protocols
Overview about channels Some operations and procedures
Rel9 Rel8 Rel7 Rel6 Rel5 Rel99
HSUPA
HSPA+
HSDPA
WCDMA Rel8
Rel9
LTE
Rel10
Scalable channel bandwidths 1.4Mhz to 20Mhz TDD and FDD
Waveforms OFDMA in DL SC-FDMA in UL
Modulation for data channels QPSk,16-QAM,64-QAM
MIMO support Inter-cell interference management
DL and UL performance is better than HSPA rel6. Coverage
Mobility Interworking with existing 3G and non-3G networks.
Two possible radio frame structures FDD
TDD
EPC /P-GW
/P-GW
3G Centralized radio
resource management High latency Usage of both circuit switched and packet networks. Internetworking with 3GPP technologies only.
LTE Distributed Radio resource management Low latency All IP packet core network. Internetworking with
both 3GPP and non3GPP technologies.
UE
eNB
S-GW
P-GW
IP-NW
Two protocols for NAS Evolved Mobility Management Evolved Session Management
Attach request+ PDN connectivity request S1 signal connection setup
authentication Subscriber info Attach accept
EPS bearer setup accept Attach conform
Default EPS bearer setup
HSS
Logical channels Transport channels
Physical channels
Needs two synchronization signals PSS SSS
Additional sys information over PBCH and PDSCH Procedure: Switch on the mobile Receive the PSS signal Receive the SSS signal
Read the PBCH for SIB and PDSCH for MIB Register to the network
Single communication link between eNB and UE No more soft handover
Two types of handovers in LTE Network based handover Traditional handover process UE based – Radio Link Failure handover Triggered by RLF so need to be done by UE.
