METHOD AND ELECTRONIC DEVICE TO RECOVER FROM A FORBIDDEN TRACKING AREA IDENTITY (FTAI) AFTER NO SLICES AVAILABLE IN NETWORK
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United States of America
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Issued Date -
Feb 13, 2025
app pub date -
May 28, 2024
filing date -
May 28, 2024
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Abstract
A method to recover from a forbidden tracking area identity (FTAI) after no slices available in a network is provided. The method is applied to user equipment. The method includes the following steps. A reject cause #62 (no network slices available) in a message is received from the network. There is an allowed network slice selection assistance information (NSSAI) or configured NSSAI in the message. All single-NSSAI (S-NSSAI) in the allowed NSSAI and the configured NSSAI are rejected, and at least one S-NSSAI is rejected due to “S-NSSAI not available in a current registration area”. A suitable cell in another tracking area is sought.
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