TC_B_57_CS — Network Reconnection - After connection loss

TC_B_57_CS — Network Reconnection - After connection loss

Source: OCPP 2.0.1 Part 6 — Test Cases (Core & Advanced Security, FINAL, 2023-06-30) — Functional block B. Provisioning, page 83.

Identification

Field	Value
Test case name	Network Reconnection - After connection loss
Test case Id	TC_B_57_CS
Use case Id(s)	Part 4 section 5.3. Reconnecting
Requirement(s)	Described at section 5.3.
System under test	Charging Station
Functional block	B. Provisioning

Description

When the connection is lost, the Charging Station SHALL try to reconnect. When reconnecting, the Charging Station SHALL use an increasing back-off time until it has successfully reconnected.

Purpose

To verify if the Charging Station is able to reconnect to the CSMS using the described OCPP reconnecting mechanism from part 4.

Prerequisite(s)

N/a

Before (Preparations)

Configuration State:

• OCPPCommCtrlr.RetryBackOffRepeatTimes is 2 OCPPCommCtrlr.RetryBackOffRandomRange is 0 OCPPCommCtrlr.RetryBackOffWaitMinimum is <Configured RetryBackOffWaitMinimum>

Memory State:

• N/a

Reusable State(s):

• N/a

Main (Test scenario)

Charging Station	CSMS
1. The OCTT closes the websocket connection.
2. The Charging Station waits for the duration of the configured RetryBackOffWaitMinimum and reconnects to the OCTT.	3. The connection attempt is accepted by the OCTT.
4. The OCTT closes the websocket connection.
5. The Charging Station waits for the duration of the configured RetryBackOffWaitMinimum and reconnects to the OCTT.	6. The connection attempt is not accepted by the OCTT.
7. The Charging Station waits for the duration of the at step 3 doubled RetryBackOffWaitMinimum and reconnects to the OCTT.	8. The connection attempt is accepted by the OCTT.

Tool validations

Step 2:

• The reconnection time is at least the configured RetryBackOffWaitMinimum.

Step 7:

• The reconnection time is at least 3 times the reconnection time from step 2.

Post scenario validations

• N/a