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Tag Archives: GTP
GTP Extension Headers (PDU session user plane protocol) in 5GC
How GTP is extended in 5G Core Networks to support extra QoS functionality like Reflective QoS and Delay Indicators
LTE EPC: Serving Gateway (S-GW) Basic Function
Basic processes and functions of the LTE EPC Serving Gateway (S-GW).
CUPS – Control and User Plane Separation in LTE & NR with PFCP (Sx & N4)
A look at PFCP for the Sx and N4 Interfaces
Getting TEID up with GTP Tunnels
What’s the deal with Tunnel Endpoint Identifiers and what do they do?
GSM with Osmocom: GPRS & Packet Data
So far we’ve focused on building a plain “2G” (voice and SMS only) network, which was all consumers expected twenty years ago. As the number of users accessing the internet through DSL, Dial Up & ISDN grew, the idea of getting this data “on the go” became more appealing. TCP/IP was becoming the dominant standard … Continue reading GSM with Osmocom: GPRS & Packet Data
GTPv2 – F-TEID Interface Types
A quick look at the Interface Types in the F-TIED field in GTPv2
Why GTP for Mobile Networks?
Why and How GTP is used in LTE networks to carry user data.
IMTx: NET02x (4G Network Essentials) – Management of Data Flows – 7. NAS and Global View of Protocol Stack
These are my lecture notes from IMT’s NET02x (4G Network Essentials) course, I thought I’d post them here as they may be useful to someone. You can find my complete notes here. The LTE architecture compartmentalises the roles in the mobile network. For example the eNB concentrates on radio connection management, while the MME focuses … Continue reading IMTx: NET02x (4G Network Essentials) – Management of Data Flows – 7. NAS and Global View of Protocol Stack
IMTx: NET02x (4G Network Essentials) – Management of Data Flows – 5/6. S1AP Connection
These are my lecture notes from IMT’s NET02x (4G Network Essentials) course, I thought I’d post them here as they may be useful to someone. You can find my complete notes here. Each MME can manage millions of UEs. To handle this load the requirements of each subscriber for the MME must be as minimal … Continue reading IMTx: NET02x (4G Network Essentials) – Management of Data Flows – 5/6. S1AP Connection
IMTx: NET02x (4G Network Essentials) – Management of Data Flows – 4. Transmitting Packets in a Tunnel
These are my lecture notes from IMT’s NET02x (4G Network Essentials) course, I thought I’d post them here as they may be useful to someone. You can find my complete notes here. Establishing a GTP Tunnel When a new tunnel is setup between two nodes, GTP-C will be used to setup the tunnel and the … Continue reading IMTx: NET02x (4G Network Essentials) – Management of Data Flows – 4. Transmitting Packets in a Tunnel
IMTx: NET02x (4G Network Essentials) – Management of Data Flows – 3. Identifying & Managing Tunnels
These are my lecture notes from IMT’s NET02x (4G Network Essentials) course, I thought I’d post them here as they may be useful to someone. You can find my complete notes here. As we’ve talked about traffic to and from UEs is encapsulated in GTP-U tunnels, with the idea that by encapsulating data destined for … Continue reading IMTx: NET02x (4G Network Essentials) – Management of Data Flows – 3. Identifying & Managing Tunnels
IMTx: NET02x (4G Network Essentials) – Management of Data Flows – 2. GTP Protocol
These are my lecture notes from IMT’s NET02x (4G Network Essentials) course, I thought I’d post them here as they may be useful to someone. You can find my complete notes here. When a packet arrives from an external network, like the internet, it is routed to the P-GW. The P-GW takes this packet and … Continue reading IMTx: NET02x (4G Network Essentials) – Management of Data Flows – 2. GTP Protocol
IMTx: NET02x (4G Network Essentials) – Management of Data Flows – 1. Principle of Encapsulation
These are my lecture notes from IMT’s NET02x (4G Network Essentials) course, I thought I’d post them here as they may be useful to someone. You can find my complete notes here. Mobile networks are by definition, mobile. In a fixed network, if I were to connect my laptop to my network at home, I’d … Continue reading IMTx: NET02x (4G Network Essentials) – Management of Data Flows – 1. Principle of Encapsulation
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