The LCS client identity is composed of one or more than one of the following components: LCS client type, external identity, internal identity, call/session related identity, APN-NI, client name and Requestor Identity. For Value added LCS client type it may contain also Client name and Requestor ID type indicator. The LCS client type shall always be present and for each LCS client type the presence of the other components are defined as follows:

In case that UE's privacy profile is stored and is checked in the GMLC (H-GMLC) or in the PPR, a pseudo-external identity may be selected as a result of the privacy check in GMLC/PPR. The pseudo-external identities may be set in the external LCS client list of the HLR privacy exception list shown in Table 10.2. The pseudo-external identity is not the identity of real external LCS client but the identity which is used for notifying SGSN/MSC of the location request class (call/session related or non-related) and the required type of indication for each class. Operator allocates E.164 addresses for the pseudo-external identities. The pseudo-external identities are used for interworking with pre Rel-6 serving nodes. Fourteen pseudo-external identities shall be defined. The pseudo-external identities are summarized in the Table C.1.

If the UE subscribes to the universal or PLMN class, H-GMLC/PPR sends the pseudo external identity 1 to the serving nodes. Usage of the pseudo-external identities are as follows:

• The pseudo-external identities are registered in SLPP of the HLR/HSS.
• The SLPP is sent to the serving nodes, during the Insert Subscriber Data procedures.
• After the privacy check in the H-GMLC/PPR, the H-GMLC/PPR selects an appropriate pseudo-external identity according to the required privacy related actions (i.e. checking the on-going call/session and/or notification/verification procedures) in the serving node.
• H-GMLC sends Provide Subscriber Location message to the serving node, which includes the pseudo-external identity instead of the real external client identity. The real external client identity may be included in the additional information element and is sent to serving node. The pseudo-external identity is sent to the serving node directly from H-GMLC or via V-GMLC.

Table C.2 and Table C.3 shows how the pseudo-external identities are set in the SLPP in HLR/HSS.

The selection of pseudo-external identity is based on the result of the privacy check in the H-GMLC/PPR. Table C.4 shows the relation between privacy check result and the pseudo-external identities.

In case the MSC/SGSN or the UE is pre Rel-5 then there is no possibility to send the Requestor identity to the UE in a new separate parameter. To obtain this backward compatibility the GMLC can add the Requestor identity to LCS client name. In order to offer best possible service for the end user the UE should be able to differentiate LCS client name and Requestor ID when they are included in to a same parameter. Also it is important that the LCS client name and the Requestor ID are separated with a consistent manner. Therefore there is a need to define a rule how the GMLC should separate LCS client name and Requestor identity. In the box below is described the practice how the LCS client name and Requestor identity should be separated. LCS client name and Requestor identity are separated with two equal signs.