临菲信息技术港

Table of contents

Introduction.................................................................................................................................3

1 Making communications wireless ...................................................................................4

1.1 Evolution of cellular standards.......................................................................................4

1.2 GSM: A historical perspective.........................................................................................10

2 Overview of radio interface processing..........................................................................11

2.1 An overview of the radio interface protocol stack..................................................11

2.2 CDMA based physical layer baseband processing in 3G networks...................15

2.3 OFDM baseband processing in 4G and 5G networks.............................................20

3 Device network radio interface interactions .................................................................27

3.1 Overview of device operations........................................................................................27

3.2 Cell search and cellular network acquisition..............................................................28

3.3 Contacting the cellular network: random access......................................................29

3.4 Device core network interactions...................................................................................30

3.5 Data transfer...........................................................................................................................31

3.6 Handover and cell reselection..........................................................................................34

4 Summary......................................................................................................................................36

5 References...................................................................................................................................37

点击阅读