LTE TRANSPORT TUTORIAL(NSN CONF.)

[auto_art]

LTE TRANSPORT TUTORIAL(NSN CONF.)


pl help in rating thread & add rep.

index

LTE Basics.................................................................................................................................12
2.1 Network Architecture Evolution ............................................................................................12
2.2 Protocol Stacks....................................................................................................................15
2.2.1 User Plane....................................................................................................................15
2.2.2 Control Plane................................................................................................................15
2.3 Intra-LTE Handover .............................................................................................................16
2.4 Transport Performance Requirements .................................................................................18
2.4.1 Throughput (Capacity) ..................................................................................................18
2.4.2 Delay (Latency), Delay Variation (Jitter)........................................................................23
2.4.3 TCP Issues ...................................................................................................................25
3. Mobile Backhaul Architecture for LTE ........................................................................................26
3.1 X2 Connectivity Requirements.............................................................................................26
3.2 Implementation Options .......................................................................................................28
3.2.1 L2 vs. L3 .......................................................................................................................28
3.2.2 Ethernet Based Backhaul Network................................................................................29
3.2.2.1 E-Line .......................................................................................................................30
3.2.2.2 E-LAN .......................................................................................................................31
3.2.2.3 E-Tree .......................................................................................................................32
3.2.2.4 Comparison...............................................................................................................33
3.2.3 Implementation Examples.............................................................................................34
3.3 Transport Service Attributes.................................................................................................36
3.3.1 Capacity .......................................................................................................................36
3.3.2 Performance .................................................................................................................36
3.4 Traffic Differentiation with VLAN and IP Addressing............................................................37
3.4.1 Generic eNB IP Addressing Model................................................................................37
3.4.2 Network Reference Configurations ...............................................................................41
3.5 Transport Redundancy ........................................................................................................44
3.5.1 General.........................................................................................................................44
3.5.2 SCTP Multi-homing.......................................................................................................45
3.6 Base Station Co-location .....................................................................................................46
4. LTE Transport Interfaces and Protocols .....................................................................................47
4.1 Ethernet ...............................................................................................................................47
4.2 IP .........................................................................................................................................48
4.2.1 General.........................................................................................................................48
4.2.2 MTU Size Issues...........................................................................................................49
4.2.2.1 Enforcement of lower MTU size ................................................................................50
4.2.2.2 IP Fragmentation and Reassembly ...........................................................................51
4.2.2.3 Ethernet Jumbo Frames............................................................................................52
4.2.3 IPv6 ..............................................................................................................................53
5. QoS............................................................................................................................................55
5.1 End-to-End QoS ..................................................................................................................55
5.2 Transport QoS Features ......................................................................................................56
5.2.1 Traffic Prioritization on IP Layer ....................................................................................56
5.2.2 Traffic Prioritization on Ethernet Layer ..........................................................................57
5.2.3 Packet Scheduling ........................................................................................................58
5.2.4 Traffic Shaping .............................................................................................................59
5.3 Mapping RRM QoS onto Transport QoS..............................................................................60
5.4 Congestion Control ..............................................................................................................61
3 (86) Radio Transport PM LTE Transport
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6. Synchronization..........................................................................................................................62
6.1 Synchronization from GPS...................................................................................................62
6.2 Synchronization from Transport Network .............................................................................63
6.2.1 IEEE1588-2008 Precision Time Protocol (Timing-over-Packet) ....................................63
6.2.2 Synchronous Ethernet ..................................................................................................65
6.3 Solutions for Co-location with Legacy Equipment ................................................................66
6.3.1 Synchronization from PDH interface .............................................................................66
6.3.2 Synchronization from 2.048MHz signal .........................................................................67
7. Transport Security......................................................................................................................68
7.1 General................................................................................................................................68
7.2 X2 Issues.............................................................................................................................70
7.3 IPsec Tunnel Mode vs. Transport Mode...............................................................................72
7.4 Security Associations and IP Addressing .............................................................................72
7.5 Public Key Infrastructure (PKI).............................................................................................75
8. Transport Operability..................................................................................................................76
8.1 Ethernet OAM ......................................................................................................................76
8.2 Transport Plug’n’Play (SON)................................................................................................77
8.2.1 Auto-Connection ...........................................................................................................77
8.2.2 Auto-configuration.........................................................................................................79
9. Flexi Transport Sub-Modules for LTE.........................................................................................80

[muni]

Thanks auto_art, for your best efffort to realize the NSN transport network for LTE
Good as with transport protocol , end entities and best explanation of each and every node,

Good Luck

Regards

Munishwar