Content MCS Generations Generations 3 G

Content

MCS: Generations

Generations: 3 G

Generations: 4 G

Generations: 5 G. Challenges

5 G: NFV, SDN, CDN

Multiple Access Systems [PP]

Multiplexing [JS]

Frequency multiplex [JS]

Time multiplex [JS]

Time and frequency multiplex [JS]

Code multiplex [JS]

Radio and propagation [PP]

Multipath[PP]

Fading [PP]

Spread spectrum technology [JS] power interference spread signal power detection at receiver f signal spread interference f

Effects of spreading and interference [JS]

channel quality 1 2 5 3 6 4 frequency narrow band signal guard space channel quality 1 spread spectrum 2 2 2 frequency

user data 0 1 chipping sequence 0110101 resulting signal 01101011001010

DSSS (Direct Sequence Spread Spectrum) II [JS] spread spectrum signal transmit signal user data X chipping sequence modulator radio carrier correlator received signal demodulator radio carrier lowpass filtered signal chipping sequence products X integrator sampled sums decision data

FHSS (Frequency Hopping Spread Spectrum) I [JS]

FHSS (Frequency Hopping Spread Spectrum) II [JS] user data 0 1 1 t f slow hopping (3 bits/hop) f t fast hopping (3 hops/bit) t

FHSS (Frequency Hopping Spread Spectrum) III [JS] spread transmit signal narrowband signal user data modulator frequency synthesizer received signal hopping sequence narrowband signal demodulator frequency synthesizer demodulator hopping sequence data

Cell breathing [JS]

Cellular concept [PP]

Frequency reuse pattern

Cell types

Channel assignment issues

Cells. Advantages

Cells. Drawbacks: handover

Types of handover

Traffic vs. signalling

Spectrum efficiency

Spectrum efficiency. Techniques

GSM evolution

GSM 900, 1800, 1900

Ingredients 1: Mobile Phones [JS] The visible but smallest part of the network!

Ingredients 2: Antennas [JS] Still visible – cause many discussions…

Not „visible“, but comprise the major part of the network (also from an investment point of view…)

GSM architecture

GSM architecture. Elements

GSM architecture. Radio subsystem

GSM architecture. Core network

GPRS - motivation

GPRS - Motivation

General architecture of GPRS network

GPRS system architecture

Legend

Overview of resource allocation in GPRS

Main transactions. Resource allocation in GPRS

GPRS Qo. S specification

An introduction to LTE

Targets

Solutions: OFDM

OFDMA principles

OFDM: principles

OFDMA and SC-FDMA

OFDMA and spectrum flexibility

Solutions: frame structure

Solutions: architecture Fig 4. Radio access and core network (Figure 18. 1 from [DPSB 07], p 371) Fig 5 LTE architecture (Figure 1. 13 from [LL 08], p 23)

Solutions: architecture

Architecture evolution

LTE architecture

LTE architecture: EPC

LTE architecture from [LL 08]

Fig 9. Comparison between radio access architecture for UMTS and LTE (fig 2. 7 from [LL 08], p 38)

Time-frequency allocation

Fig 13 Frequency domain scheduling (Figure 16. 1 from [HT 07], p 465)

References

References

References