LTE Attach Procedure | E2E Call Flow, MME, EPS Bearer & Default Bearer | 4G E2E Signaling Session 5

Session 5 of my 4G/LTE E2E Signaling series is out: the LTE Attach Procedure.

Attach is the first thing a phone does on an LTE network. It registers, gets authenticated, receives an IP address and sets up the Default EPS Bearer.

In this session:
→ Attach Functions & Triggering Conditions
→ The full call flow between UE, eNodeB, MME, SGW, PGW and HSS
→ Default Bearer - always-on connectivity Explained
→ What Attach looks like in drive-test traces

RACH CBRA/CFRA Call Flow and Use Cases

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4G LTE Cell Selection Explained: Initial Selection, Stored Information and Cell Selection Criteria

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5G PDCCH Optimization Approach: Understand DCI Applications, CSS vs USS and What Is Consuming PDCCH Resources

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5G NSA SgNB Addition: Key Timers Impacting the Success Rate

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Mohamed ELAdawi Telecom Expert | 5G & 6G Trainer

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RACH CBRA/CFRA Call Flow and Use Cases

4G LTE Cell Selection Explained: Initial Selection, Stored Information and Cell Selection Criteria

5G PDCCH Optimization Approach: Understand DCI Applications, CSS vs USS and What Is Consuming PDCCH Resources

5G NSA SgNB Addition: Key Timers Impacting the Success Rate