Section: 6.5.4 UE requested bearer resource modification procedure 6.5.4.1 General
Content: The purpose of the UE requested bearer resource modification procedure is for a UE to: a) request a modification; b) release of bearer resources for a traffic flow aggregate; c) modify a traffic flow aggregate by replacing packet filters or adding packet filters; d) re-negotiate header compression configuration associated to an EPS bearer context; e) indicate a change of 3GPP PS data off UE status for a PDN connection; f) transmit information for the C2 authorization for the UAS services; or g) provide a UE policy container with the length of two octets containing the UE STATE INDICATION message (see 3GPP TS 24.501[ Non-Access-Stratum (NAS) protocol for 5G System (5GS); Stage 3 ]  [54] annex D). When requesting a modification of bearer resources for a traffic flow aggregate or a modification of a traffic flow aggregate, the UE can modify the existing GBR. If accepted by the network, this procedure invokes a dedicated EPS bearer context activation procedure (see clause 6.4.2), an EPS bearer context modification procedure (see clause 6.4.3), or an EPS bearer context deactivation procedure (see clause 6.4.4). If there is a PDN connection for emergency bearer services established, the UE shall not request a modification of bearer resources for this PDN connection. When the UE requested bearer resource modification procedure is used to indicate a change of 3GPP PS data off UE status for a PDN connection (see clause 6.3.10), the UE shall initiate the UE requested bearer resource modification procedure even if the timer T3396 or the back-off timer is running or is deactivated.