1. Slide title 48 pt Slide subtitle 30 pt LTE Interfaces & Protocols Overview

2. Slide title 32 pt Text 24 pt Bullets level 2-5 20 pt › !"# $%&'()*+,-./0123456789:; ?@ABCD EFGHIJKLMNOPQRSTUVW XYZ[\]^_`abcdefghijklm nopqrstuvwxyz{|}~¡¢£¤¥ ¦§¨©ª«¬®¯°±²³´¶·¸¹º»¼½ÀÁ ÃÄÅÆÇÈËÌÍÎÏÐÑÒÓÔÕÖ×ØÙ ÚÛÜÝÞßàáâãäåæçèéêë ìíîïðñòóôõö÷øùúûüýþÿĀ āĂăąĆćĊċČĎďĐđĒĖėĘęĚ ěĞğĠġĢģĪīĮįİıĶķĹĺĻļĽľŁłŃ ńŅņŇňŌŐőŒœŔŕŖŗŘřŚ śŞşŠšŢţŤťŪūŮůŰűŲųŴŵ ŶŷŸŹźŻżŽžƒȘșˆˇ˘˙˚˛˜˝Ẁẁẃ ẄẅỲỳ–— ‘’‚“”„†‡…‰‹›⁄€™−≤≥fifl Do not add objects or text in the footer area © Ericsson AB 2009 | Ericsson Internal | X (X) | Date Objectives ›Describe the LTE Interfaces ›Describe the protocol stack used on each interface ›Highlight the interconnection between different nodes in the RAN LTE System.

3. Slide title 32 pt Text 24 pt Bullets level 2-5 20 pt › !"# $%&'()*+,-./0123456789:; ?@ABCD EFGHIJKLMNOPQRSTUVW XYZ[\]^_`abcdefghijklm nopqrstuvwxyz{|}~¡¢£¤¥ ¦§¨©ª«¬®¯°±²³´¶·¸¹º»¼½ÀÁ ÃÄÅÆÇÈËÌÍÎÏÐÑÒÓÔÕÖ×ØÙ ÚÛÜÝÞßàáâãäåæçèéêë ìíîïðñòóôõö÷øùúûüýþÿĀ āĂăąĆćĊċČĎďĐđĒĖėĘęĚ ěĞğĠġĢģĪīĮįİıĶķĹĺĻļĽľŁłŃ ńŅņŇňŌŐőŒœŔŕŖŗŘřŚ śŞşŠšŢţŤťŪūŮůŰűŲųŴŵ ŶŷŸŹźŻżŽžƒȘșˆˇ˘˙˚˛˜˝Ẁẁẃ ẄẅỲỳ–— ‘’‚“”„†‡…‰‹›⁄€™−≤≥fifl Do not add objects or text in the footer area © Ericsson AB 2009 | Ericsson Internal | X (X) | Date LTE RAN Interfaces ›X2 interface between 2 eNodeBs. ›S1 interface to Evolved Packet Core. ›Uu air Interface ›SGW Serving Gateway ›MME Mobility Management Entity

4. Slide title 32 pt Text 24 pt Bullets level 2-5 20 pt › !"# $%&'()*+,-./0123456789:; ?@ABCD EFGHIJKLMNOPQRSTUVW XYZ[\]^_`abcdefghijklm nopqrstuvwxyz{|}~¡¢£¤¥ ¦§¨©ª«¬®¯°±²³´¶·¸¹º»¼½ÀÁ ÃÄÅÆÇÈËÌÍÎÏÐÑÒÓÔÕÖ×ØÙ ÚÛÜÝÞßàáâãäåæçèéêë ìíîïðñòóôõö÷øùúûüýþÿĀ āĂăąĆćĊċČĎďĐđĒĖėĘęĚ ěĞğĠġĢģĪīĮįİıĶķĹĺĻļĽľŁłŃ ńŅņŇňŌŐőŒœŔŕŖŗŘřŚ śŞşŠšŢţŤťŪūŮůŰűŲųŴŵ ŶŷŸŹźŻżŽžƒȘșˆˇ˘˙˚˛˜˝Ẁẁẃ ẄẅỲỳ–— ‘’‚“”„†‡…‰‹›⁄€™−≤≥fifl Do not add objects or text in the footer area © Ericsson AB 2009 | Ericsson Internal | X (X) | Date The protocol stacks-control plane ›Key to figure: ›IP Internet Protocol ›L1 Layer 1 ›L2 Layer 2 ›MAC Medium Access Control ›NAS Non-Access Stratum ›PDCP Packet Data Convergence Protocol ›PHY Physical Layer › RLC Radio Link Control ›RRC Radio Resource Control ›S1AP S1 Application Protocol ›SCTP Stream Control Transmission Protocol

5. Slide title 32 pt Text 24 pt Bullets level 2-5 20 pt › !"# $%&'()*+,-./0123456789:; ?@ABCD EFGHIJKLMNOPQRSTUVW XYZ[\]^_`abcdefghijklm nopqrstuvwxyz{|}~¡¢£¤¥ ¦§¨©ª«¬®¯°±²³´¶·¸¹º»¼½ÀÁ ÃÄÅÆÇÈËÌÍÎÏÐÑÒÓÔÕÖ×ØÙ ÚÛÜÝÞßàáâãäåæçèéêë ìíîïðñòóôõö÷øùúûüýþÿĀ āĂăąĆćĊċČĎďĐđĒĖėĘęĚ ěĞğĠġĢģĪīĮįİıĶķĹĺĻļĽľŁłŃ ńŅņŇňŌŐőŒœŔŕŖŗŘřŚ śŞşŠšŢţŤťŪūŮůŰűŲųŴŵ ŶŷŸŹźŻżŽžƒȘșˆˇ˘˙˚˛˜˝Ẁẁẃ ẄẅỲỳ–— ‘’‚“”„†‡…‰‹›⁄€™−≤≥fifl Do not add objects or text in the footer area © Ericsson AB 2009 | Ericsson Internal | X (X) | Date S1-Interface ›S1 interface Connects the Core to the RBS ›S1 Interface in Core Network terminates in: 1.SGW User Plane 2.MME Control Plane ›The RBS is the terminating point for both: 1.User Plane 2.Control Plane ›The S1 interface is a many-to-many interface i.e: 1.Each RBS can connect to many MMEs and SGWs. 2.Each MME and SGW can connect to many RBSs.

6. Slide title 32 pt Text 24 pt Bullets level 2-5 20 pt › !"# $%&'()*+,-./0123456789:; ?@ABCD EFGHIJKLMNOPQRSTUVW XYZ[\]^_`abcdefghijklm nopqrstuvwxyz{|}~¡¢£¤¥ ¦§¨©ª«¬®¯°±²³´¶·¸¹º»¼½ÀÁ ÃÄÅÆÇÈËÌÍÎÏÐÑÒÓÔÕÖ×ØÙ ÚÛÜÝÞßàáâãäåæçèéêë ìíîïðñòóôõö÷øùúûüýþÿĀ āĂăąĆćĊċČĎďĐđĒĖėĘęĚ ěĞğĠġĢģĪīĮįİıĶķĹĺĻļĽľŁłŃ ńŅņŇňŌŐőŒœŔŕŖŗŘřŚ śŞşŠšŢţŤťŪūŮůŰűŲųŴŵ ŶŷŸŹźŻżŽžƒȘșˆˇ˘˙˚˛˜˝Ẁẁẃ ẄẅỲỳ–— ‘’‚“”„†‡…‰‹›⁄€™−≤≥fifl Do not add objects or text in the footer area © Ericsson AB 2009 | Ericsson Internal | X (X) | Date S1 Control Plane ›S1AP is the signaling protocol that MME use to manage : 1.The connection. 2. The radio. 3.S1 bearers used to carry EPS bearers. 4.The access stratum security functions. 5.User plane tunnel. 6.Paging 7.Mobility. ›S1AP is carried over SCTP and IP to provide reliable transmission over the S1 interface. ›One SCTP connection exists for each MME-RBS relation.

7. Slide title 32 pt Text 24 pt Bullets level 2-5 20 pt › !"# $%&'()*+,-./0123456789:; ?@ABCD EFGHIJKLMNOPQRSTUVW XYZ[\]^_`abcdefghijklm nopqrstuvwxyz{|}~¡¢£¤¥ ¦§¨©ª«¬®¯°±²³´¶·¸¹º»¼½ÀÁ ÃÄÅÆÇÈËÌÍÎÏÐÑÒÓÔÕÖ×ØÙ ÚÛÜÝÞßàáâãäåæçèéêë ìíîïðñòóôõö÷øùúûüýþÿĀ āĂăąĆćĊċČĎďĐđĒĖėĘęĚ ěĞğĠġĢģĪīĮįİıĶķĹĺĻļĽľŁłŃ ńŅņŇňŌŐőŒœŔŕŖŗŘřŚ śŞşŠšŢţŤťŪūŮůŰűŲųŴŵ ŶŷŸŹźŻżŽžƒȘșˆˇ˘˙˚˛˜˝Ẁẁẃ ẄẅỲỳ–— ‘’‚“”„†‡…‰‹›⁄€™−≤≥fifl Do not add objects or text in the footer area © Ericsson AB 2009 | Ericsson Internal | X (X) | Date The protocol stacks-user plane ›GTP-U General Packet Radio System (GPRS) Tunnelling Protocol for User Plane ›OSP Open Settlement Protocol ›PPP Point to Point Protocol ›UDP User Datagram Protocol

8. Slide title 32 pt Text 24 pt Bullets level 2-5 20 pt › !"# $%&'()*+,-./0123456789:; ?@ABCD EFGHIJKLMNOPQRSTUVW XYZ[\]^_`abcdefghijklm nopqrstuvwxyz{|}~¡¢£¤¥ ¦§¨©ª«¬®¯°±²³´¶·¸¹º»¼½ÀÁ ÃÄÅÆÇÈËÌÍÎÏÐÑÒÓÔÕÖ×ØÙ ÚÛÜÝÞßàáâãäåæçèéêë ìíîïðñòóôõö÷øùúûüýþÿĀ āĂăąĆćĊċČĎďĐđĒĖėĘęĚ ěĞğĠġĢģĪīĮįİıĶķĹĺĻļĽľŁłŃ ńŅņŇňŌŐőŒœŔŕŖŗŘřŚ śŞşŠšŢţŤťŪūŮůŰűŲųŴŵ ŶŷŸŹźŻżŽžƒȘșˆˇ˘˙˚˛˜˝Ẁẁẃ ẄẅỲỳ–— ‘’‚“”„†‡…‰‹›⁄€™−≤≥fifl Do not add objects or text in the footer area © Ericsson AB 2009 | Ericsson Internal | X (X) | Date S1-User Plane ›It is the same for X2 User Plane. ›The user data is carried by GTP-U over UDP/IP. › The GTP-U header includes a Tunnel Endpoint ID (TEID) to identify the S1 bearer. ›The GTP-U Packet Data Unit (PDU) is sent over an UDP/IP connection, identified by source and destination UDP port and IP address.

9. Slide title 32 pt Text 24 pt Bullets level 2-5 20 pt › !"# $%&'()*+,-./0123456789:; ?@ABCD EFGHIJKLMNOPQRSTUVW XYZ[\]^_`abcdefghijklm nopqrstuvwxyz{|}~¡¢£¤¥ ¦§¨©ª«¬®¯°±²³´¶·¸¹º»¼½ÀÁ ÃÄÅÆÇÈËÌÍÎÏÐÑÒÓÔÕÖ×ØÙ ÚÛÜÝÞßàáâãäåæçèéêë ìíîïðñòóôõö÷øùúûüýþÿĀ āĂăąĆćĊċČĎďĐđĒĖėĘęĚ ěĞğĠġĢģĪīĮįİıĶķĹĺĻļĽľŁłŃ ńŅņŇňŌŐőŒœŔŕŖŗŘřŚ śŞşŠšŢţŤťŪūŮůŰűŲųŴŵ ŶŷŸŹźŻżŽžƒȘșˆˇ˘˙˚˛˜˝Ẁẁẃ ẄẅỲỳ–— ‘’‚“”„†‡…‰‹›⁄€™−≤≥fifl Do not add objects or text in the footer area © Ericsson AB 2009 | Ericsson Internal | X (X) | Date X2-Interface & Protocols ›The X2 interface provides connections between RBSs and supports mobility for UE in connected mode. ›It is a many-to-many interface, so each RBS can connect to many other RBSs. ›The signalling protocol on the X2 control plane interface is called X2AP and is carried over SCTP and IP to provide reliable transmission

10. Slide title 32 pt Text 24 pt Bullets level 2-5 20 pt › !"# $%&'()*+,-./0123456789:; ?@ABCD EFGHIJKLMNOPQRSTUVW XYZ[\]^_`abcdefghijklm nopqrstuvwxyz{|}~¡¢£¤¥ ¦§¨©ª«¬®¯°±²³´¶·¸¹º»¼½ÀÁ ÃÄÅÆÇÈËÌÍÎÏÐÑÒÓÔÕÖ×ØÙ ÚÛÜÝÞßàáâãäåæçèéêë ìíîïðñòóôõö÷øùúûüýþÿĀ āĂăąĆćĊċČĎďĐđĒĖėĘęĚ ěĞğĠġĢģĪīĮįİıĶķĹĺĻļĽľŁłŃ ńŅņŇňŌŐőŒœŔŕŖŗŘřŚ śŞşŠšŢţŤťŪūŮůŰűŲųŴŵ ŶŷŸŹźŻżŽžƒȘșˆˇ˘˙˚˛˜˝Ẁẁẃ ẄẅỲỳ–— ‘’‚“”„†‡…‰‹›⁄€™−≤≥fifl Do not add objects or text in the footer area © Ericsson AB 2009 | Ericsson Internal | X (X) | Date Uu Interface Protocols

11. Slide title 32 pt Text 24 pt Bullets level 2-5 20 pt › !"# $%&'()*+,-./0123456789:; ?@ABCD EFGHIJKLMNOPQRSTUVW XYZ[\]^_`abcdefghijklm nopqrstuvwxyz{|}~¡¢£¤¥ ¦§¨©ª«¬®¯°±²³´¶·¸¹º»¼½ÀÁ ÃÄÅÆÇÈËÌÍÎÏÐÑÒÓÔÕÖ×ØÙ ÚÛÜÝÞßàáâãäåæçèéêë ìíîïðñòóôõö÷øùúûüýþÿĀ āĂăąĆćĊċČĎďĐđĒĖėĘęĚ ěĞğĠġĢģĪīĮįİıĶķĹĺĻļĽľŁłŃ ńŅņŇňŌŐőŒœŔŕŖŗŘřŚ śŞşŠšŢţŤťŪūŮůŰűŲųŴŵ ŶŷŸŹźŻżŽžƒȘșˆˇ˘˙˚˛˜˝Ẁẁẃ ẄẅỲỳ–— ‘’‚“”„†‡…‰‹›⁄€™−≤≥fifl Do not add objects or text in the footer area © Ericsson AB 2009 | Ericsson Internal | X (X) | Date Uu protocols NAS & RRC ›The Non-Access Stratum (NAS) protocol is the core network signalling protocol for the control plane. ›The Radio Resource Control (RRC) protocol handles radio related signalling towards the UE. Examples of functions include: 1.System information broadcast 2.Paging 3.RRC connection management 4.Radio bearer management 5.Handover 6.UE measurement reporting and control

12. Slide title 32 pt Text 24 pt Bullets level 2-5 20 pt › !"# $%&'()*+,-./0123456789:; ?@ABCD EFGHIJKLMNOPQRSTUVW XYZ[\]^_`abcdefghijklm nopqrstuvwxyz{|}~¡¢£¤¥ ¦§¨©ª«¬®¯°±²³´¶·¸¹º»¼½ÀÁ ÃÄÅÆÇÈËÌÍÎÏÐÑÒÓÔÕÖ×ØÙ ÚÛÜÝÞßàáâãäåæçèéêë ìíîïðñòóôõö÷øùúûüýþÿĀ āĂăąĆćĊċČĎďĐđĒĖėĘęĚ ěĞğĠġĢģĪīĮįİıĶķĹĺĻļĽľŁłŃ ńŅņŇňŌŐőŒœŔŕŖŗŘřŚ śŞşŠšŢţŤťŪūŮůŰűŲųŴŵ ŶŷŸŹźŻżŽžƒȘșˆˇ˘˙˚˛˜˝Ẁẁẃ ẄẅỲỳ–— ‘’‚“”„†‡…‰‹›⁄€™−≤≥fifl Do not add objects or text in the footer area © Ericsson AB 2009 | Ericsson Internal | X (X) | Date Uu Protocols- PDCP ›The Packet Data Convergence Protocol (PDCP) protocol is used in both the control and user plane and performs: 1.Ciphering that can be applied to both RRC signalling and user data. 2.Header compression that applies only to user data. 3.Integrity protection that applies only to RRC signalling. ›The user plane PDCP Service Data Units (SDUs) are forwarded to the RLC protocol over the S1 user plane interface.

13. Slide title 32 pt Text 24 pt Bullets level 2-5 20 pt › !"# $%&'()*+,-./0123456789:; ?@ABCD EFGHIJKLMNOPQRSTUVW XYZ[\]^_`abcdefghijklm nopqrstuvwxyz{|}~¡¢£¤¥ ¦§¨©ª«¬®¯°±²³´¶·¸¹º»¼½ÀÁ ÃÄÅÆÇÈËÌÍÎÏÐÑÒÓÔÕÖ×ØÙ ÚÛÜÝÞßàáâãäåæçèéêë ìíîïðñòóôõö÷øùúûüýþÿĀ āĂăąĆćĊċČĎďĐđĒĖėĘęĚ ěĞğĠġĢģĪīĮįİıĶķĹĺĻļĽľŁłŃ ńŅņŇňŌŐőŒœŔŕŖŗŘřŚ śŞşŠšŢţŤťŪūŮůŰűŲųŴŵ ŶŷŸŹźŻżŽžƒȘșˆˇ˘˙˚˛˜˝Ẁẁẃ ẄẅỲỳ–— ‘’‚“”„†‡…‰‹›⁄€™−≤≥fifl Do not add objects or text in the footer area © Ericsson AB 2009 | Ericsson Internal | X (X) | Date Uu Protocols RLC ›The Radio Link Control (RLC) protocol provides reliable transmission over the radio interface and provides these functions: 1.In-sequence delivery 2.Acknowledged Mode (AM) 3.Transparent Mode (TM) 4.Segmentation and reassembly is based on the transport block size selected by MAC at transmission and retransmission 5.Concatenation 6.Interworking with Hybrid Automatic Repeat Request (HARQ) to identify required retransmissions

14. Slide title 32 pt Text 24 pt Bullets level 2-5 20 pt › !"# $%&'()*+,-./0123456789:; ?@ABCD EFGHIJKLMNOPQRSTUVW XYZ[\]^_`abcdefghijklm nopqrstuvwxyz{|}~¡¢£¤¥ ¦§¨©ª«¬®¯°±²³´¶·¸¹º»¼½ÀÁ ÃÄÅÆÇÈËÌÍÎÏÐÑÒÓÔÕÖ×ØÙ ÚÛÜÝÞßàáâãäåæçèéêë ìíîïðñòóôõö÷øùúûüýþÿĀ āĂăąĆćĊċČĎďĐđĒĖėĘęĚ ěĞğĠġĢģĪīĮįİıĶķĹĺĻļĽľŁłŃ ńŅņŇňŌŐőŒœŔŕŖŗŘřŚ śŞşŠšŢţŤťŪūŮůŰűŲųŴŵ ŶŷŸŹźŻżŽžƒȘșˆˇ˘˙˚˛˜˝Ẁẁẃ ẄẅỲỳ–— ‘’‚“”„†‡…‰‹›⁄€™−≤≥fifl Do not add objects or text in the footer area © Ericsson AB 2009 | Ericsson Internal | X (X) | Date Uu Protocols MAC ›Three main functions for the Medium Access Control (MAC) protocol are: 1. HARQ, scheduling over the radio interface. 2. multiplexing of logical channels on transport channels. At transport block size selection 3. MAC (the Scheduler) interacts with RLC to obtain the correct RLC protocol data unit size for the transport block. MAC offers a number of logical channels to the RLC.Scheduler

15. Slide title 32 pt Text 24 pt Bullets level 2-5 20 pt › !"# $%&'()*+,-./0123456789:; ?@ABCD EFGHIJKLMNOPQRSTUVW XYZ[\]^_`abcdefghijklm nopqrstuvwxyz{|}~¡¢£¤¥ ¦§¨©ª«¬®¯°±²³´¶·¸¹º»¼½ÀÁ ÃÄÅÆÇÈËÌÍÎÏÐÑÒÓÔÕÖ×ØÙ ÚÛÜÝÞßàáâãäåæçèéêë ìíîïðñòóôõö÷øùúûüýþÿĀ āĂăąĆćĊċČĎďĐđĒĖėĘęĚ ěĞğĠġĢģĪīĮįİıĶķĹĺĻļĽľŁłŃ ńŅņŇňŌŐőŒœŔŕŖŗŘřŚ śŞşŠšŢţŤťŪūŮůŰűŲųŴŵ ŶŷŸŹźŻżŽžƒȘșˆˇ˘˙˚˛˜˝Ẁẁẃ ẄẅỲỳ–— ‘’‚“”„†‡…‰‹›⁄€™−≤≥fifl Do not add objects or text in the footer area © Ericsson AB 2009 | Ericsson Internal | X (X) | Date Management Interfaces ›Mul Provides access for OSS-RC to the management functions of an RBS. Also used for on-site access with client software on a personal computer. ›Mun Provides access to OSS-RC for external network management systems.