5.8 Filtering Information

The Filtering Information is used to identify or filter one or multiple AIoT Device(s). The Filtering Information is constructed by one or multiple filtering elements and each filtering element corresponds to a component (i.e. ID Type, PLMN Identifier, NID, Third Party Identifier or Identification Information) of the AIoT Device Permanent Identifier as defined in clause 5.7.

Each filtering element shall include:

• Component Type Information indicating a component of the AIoT Device Permanent Identifier that is used to match the bitstring.
• A bitstring which is used to compare with the component.
• An Offset from the beginning of the indicated component of the AIoT Device Permanent Identifier, which indicates the start location in the indicated component to be used to compare with the corresponding bitstring.
• A Length indicating the length of the bitstring.

When the Component Type Information of a filtering element indicates a PLMN ID, NID or Third-Party Identifier component, then the Offset and Length are not included in the filtering element, i.e. the whole component is compared with the bitstring.

When the Component Type Information of the filtering element indicates an Identification Information or ID Type component, the Offset and Length are always included and the indicated component is compared from the start location indicated by the Offset with the bitstring for its entire indicated Length. The AIOTF includes at most one filtering element within the Filtering Information for the ID Type, PLMN ID, NID and Third Party Identifier components of the AIoT Device Permanent Identifier.

There may be multiple filtering elements corresponding to the component Identification Information of the AIoT Device Permanent Identifier.

NOTE 1: It is assumed that the AIoT Device does not validate the number of filtering element(s) for any indicated component within the Filtering Information.

NOTE 2: The format of the Filtering Information is specified in clause 31.3 of TS 23.003 [6].

To determine whether an AIoT Device Permanent Identifier matches the Filtering Information, the bitstring of every filtering element within the Filtering Information is compared with the indicated component of the AIoT Device Permanent Identifier. If all the compared bitstrings match the corresponding component of the AIoT Device Permanent Identifier, then an AIoT Device Permanent Identifier matches the Filtering Information. If an AIoT Device Permanent Identifier does not contain an indicated component then it does not match the Filtering Information.