LTE cell search and cell selection procedure

[the.rf.consultant]

for your reference...

[adewijaya]

Rohde & Schwarz Cell search and cell reselection procedure in UMTS LTE

Table of Contents

1 Motivation ................................................................................... 4


2 LTE cell search and cell selection procedure .......................... 6



2.1 LTE Initial Access ..............................................................................................6



2.2 Initial synchronization.......................................................................................6



2.2.1 Step I – Primary Synchronization Signal ........................................................7



2.2.2 Step II – Secondary Synchronization Signal (SSS)......................................10



2.3 Broadcast of essential system information in LTE......................................15



2.3.1 PBCH and MIB .................................................................................................15



2.4 Difference between LTE FDD and TD-LTE.....................................................17



2.5 Cell selection and reselection criteria...........................................................19



3 R&S test solutions for LTE, focus cell search and selection 22



3.1 Why test cell search and selection performance?.......................................22



3.2 Downlink signal generation............................................................................23



3.3 Downlink signal analysis................................................................................24



3.4 R&S® CMW500 – UMTS LTE Protocol Tester ...............................................26



3.4.1 Introduction......................................................................................................26
3.4.2 Operating software for protocol tests ...........................................................29



3.4.3 Verification of cell-search & selection procedure with R&S® CMW500 ....29



3.4.3.1 PHY scenarios – Physical Layer Testing ......................................................29



3.4.3.2 IOT – Interoperability Testing.........................................................................30



3.4.3.3 Cell selection and reselection according to 3GPP TS 36.523 Part 1..........33


3.4.3.4 Cell selection and reselection according to 3GPP TS 36.521 Part 3..........34