1 LTE / HSPA / EPC knowledge nuggets Red Banana Wireless Ltd – Copyright GPP Service Data Flows 3GPP Service Data Flows LTE / HSPA / EPC ‘knowledge nuggets’ Neil Wiffen - More free downloads at Public Seminar details –

2 LTE / HSPA / EPC knowledge nuggets Red Banana Wireless Ltd – Copyright GPP Service Data Flows EPS provides IP connectivity between a UE and a PDN –PDN Connectivity Service –Supports the transport of one or more Service Data Flows (SDFs) SDF –An aggregate set of packet flows that matches an SDF Template SDF Template –The set of SDF filters in a PCC rule SDF Filter –A set of packet flow header parameter values/ranges –Used to identify one or more of the packet flows constituting an SDF Service Data Flow (SDF)

3 LTE / HSPA / EPC knowledge nuggets Red Banana Wireless Ltd – Copyright GPP Service Data Flows Filter based on packet header characteristics –IP header only Source / destination IP address Protocol ID Type Of Service (TOS) / Traffic Class / Flow Label IPSec Security Parameter Index (SPI) Individual values or ranges –IP + Transport Layer header Source / destination port numbers Individual values or ranges –IP + Transport Layer + Application Layer E.g. application version information / state information May be used to support filtering with respect to a service data flow based on the transport and application protocols used above IP These filters must be pre-configured in the PCEF Service Data Flow (SDF) Filter

4 LTE / HSPA / EPC knowledge nuggets Red Banana Wireless Ltd – Copyright GPP Service Data Flows SDF filters Incoming Packet Flow AABACBC Filter evaluation (e.g. pattern-matching) BC Packet Headers match filter A,B or C Filter for SDF 2 Rule processing (gating / credit control / authorization etc.) QoS Control PCEF PGW Outgoing Packets for SDF 1 Outgoing Packets for SDF 2 A Filters for SDF 1

5 LTE / HSPA / EPC knowledge nuggets Red Banana Wireless Ltd – Copyright GPP Service Data Flows QoS Concepts in the EPS S-GWP-GW ENb EUTRAN EPC EPS External PDN PDN Connectivity Service One or more SDFs (PCC controlled) One or more EPS bearers (NAS/EPC controlled)

6 LTE / HSPA / EPC knowledge nuggets Red Banana Wireless Ltd – Copyright GPP Service Data Flows Bearer QoS Parameters for Scheduling QoS Class Identifier Class of service per bearer Guaranteed Bit Rate Maximum Bit Rate Allocation and Retention Policy Aggregate Maximum Bit Rates UE-AMBR - limited by a subscription parameter in HSS APN-AMBR - limited by a subscription parameter per APN in HSS HSS defines the 'EPS subscribed QoS profile' Contains bearer level QoS parameter values for the default bearer Defined for each PDN subscription context

7 LTE / HSPA / EPC knowledge nuggets Red Banana Wireless Ltd – Copyright GPP Service Data Flows QCI Characteristics QCI Resource Type Priority Packet Delay Budget Packet Error Loss Rate Example Services 1 GBR 2100 ms10 -2 Conversational Voice ms10 -3 Conversational Video (Live Streaming) 3350 ms10 -3 Real Time Gaming ms10 -6 Non-Conversational Video (Buffered Streaming) 5 Non-GBR 1100 ms10 -6 IMS Signalling ms10 -6 Video (Buffered Streaming) TCP-based (e.g., www, , chat, ftp, p2p file sharing, progressive video, etc.) ms10 -3 Voice, Video (Live Streaming) Interactive Gaming ms10 -6 Video (Buffered Streaming) TCP-based (e.g., www, , chat, ftp, p2p file sharing, progressive video, etc.) 99

8 LTE / HSPA / EPC knowledge nuggets Red Banana Wireless Ltd – Copyright GPP Service Data Flows QCI = 5 P-CSCF details –Provided as Protocol Options from PGW / MME –Or P-CSCF ‘discoverable’ in PDN PGW configured for routing to IMS platform PCC rules support SIP/IMS signalling Default Bearer for IMS Signalling

9 LTE / HSPA / EPC knowledge nuggets Red Banana Wireless Ltd – Copyright GPP Service Data Flows EPS Bearers and QoS QoS is controlled at the EPS bearer level All traffic mapped to the same EPS bearer receive the same bearer level packet forwarding treatment Providing different bearer level packet forwarding treatment requires separate EPS bearers One EPS bearer is established when the UE connects to a PDN Remains established throughout the lifetime of the PDN connection Provides always-on IP connectivity to that PDN Default bearer Additional EPS bearers can be established to same PDN connection Dedicated bearers Distinction between default and dedicated is transparent to the SGW and ENB

10 LTE / HSPA / EPC knowledge nuggets Red Banana Wireless Ltd – Copyright GPP Service Data Flows QoS and TFT SGWPGW UL Traffic Flow Aggregates DL Traffic Flow Aggregates UL TFT DL TFT UL TFT  RB ID RB ID  S1 TEIDS1 TEID  S5/S8 TEID S5/S8 TEID  DL TFTRB ID  S1 TEIDS1 TEID  S5/S8 TEID EPS Bearer with defined QoS Packet Filters - applied to each uplink IP-datagram (QoS control) Packet Filters - applied to each downlink IP-datagram (QoS control) UL / DL QoS managed by ENB scheduler UL QoS managed by ENB ‘router’ DL QoS managed by SGW ‘router’

11 LTE / HSPA / EPC knowledge nuggets Red Banana Wireless Ltd – Copyright GPP Service Data Flows Backup slides

12 LTE / HSPA / EPC knowledge nuggets Red Banana Wireless Ltd – Copyright GPP Service Data Flows What clients say about us: „We are very proud of our products and so it is important to us to have complete confidence in the people who represent us before our customers. Neil Wiffen’s ability to develop unparalled levels of enthusiasm for his subject matter is a key reason for selecting him as our preferred supplier of out-sourced customer training... In deeply technical areas he is able to convey both the micro and the macro levels of detail, skilfully creating the overview which provides the context for the crucial nuggets of detail.” Andy Richards, Operations Manager, Anritsu Ltd. Washington DC: Atlanta GA: Dallas/Austin TX: Register now at: 4G-Seminar.com 4G-Seminar.com