Section: Annex F (normative): Application specific Congestion control for Data Communication (ACDC)
Content: The UE may support the procedures in this annex. If the UE supports ACDC, the EMM layer shall determine the ACDC category applicable to the request based on the application identifier received from the upper layers and the configuration information in the "ACDCConf" leaf of ACDC MO as specified in 3GPP TS 24.105[ Application specific Congestion control for Data Communication (ACDC) Management Object (MO) ]  [35] or in the USIM EFACDC as specified in 3GPP TS 31.102[ Characteristics of the Universal Subscriber Identity Module (USIM) application ]  [17]. NOTE 1: As an implementation option, the upper layers can determine the ACDC category and send it to the EMM layer. Then the EMM layer need not read the ACDC MO or USIM to determine the ACDC category. The EMM sublayer shall indicate to the lower layers, for the purpose of access control: - the ACDC category that applies to this request if only one ACDC category is applicable; - the highest ranked ACDC category among the ACDC categories that applies to this request if multiple ACDC categories are applicable; or - this request is for an uncategorized application if an application identifier received from the upper layers is not mapped to any ACDC category, except for the following cases: - the UE is a UE configured to use AC11 – 15 in selected PLMN; - the UE is answering to paging; - the RRC Establishment cause is set to "Emergency call"; or - if conditions MO MMTEL voice call is started or MO MMTEL video call is started or MO SMSoIP is started, is satisfied. NOTE 2: The request from the EMM sublayer refers to either a request to establish an initial NAS signalling connection or a request to re-establish a NAS signalling connection. If the UE supports ACDC and access is barred because of ACDC, the EMM layer shall keep track of the ACDC category for which access is barred and it shall not send a request for the same ACDC category or a lower ACDC category until access is granted. If the UE supports ACDC and access is barred because of ACDC, the EMM layer shall not send a request for any uncategorized application until access is granted.