Section: 8.88 Signalling Priority Indication
Content: The Signalling Priority Indication information element contains signalling priority indications received from the UE for a specific PDN connection. The Signalling Priority Indication information element is coded as shown in figure 8.88-1. Figure 8.88-1: Signalling Priority Indication The following bits within Octet 5 shall indicate: - Bit 8 to 2 – Spare, for future use and set to zero. - Bit 1 – LAPI (Low Access Priority Indication): This bit defines if the UE indicated low access priority when establishing the PDN connection. It shall be encoded as the Low Priority parameter of the Device Properties IE in 3GPP TS 24.008[ Mobile radio interface Layer 3 specification; Core network protocols; Stage 3 ]  [5]. The receiver shall assume the value "0" if the Signalling Priority Indication IE is applicable for a message but not included in that message by the sender. The low access priority indication may be included in charging records.