Vorlage 3a

Technical requirements for the handover interfaces for the execution of telecommunications surveillance

Structure Sub-structure Format

GSMLocation geoCoordinates latitude XDDMMSS.SS

longitude XDDDMMSS.SS

mapDatum wGS84

azimuth (0..359) OPTIONAL (see NOTE) UMTSLocation GA-Point GeographicalCoordinates

latitudeSign ENUMERATED {north,

south}

latitude (0..8388607)

longitude (-8388608..8388607)

-- as defined in 3GPP TS 23.032

Table 6-7: Mobile networks location geocoordinates encoding

NOTE: when a cell is composed of several main beam directions or when it is omnidirectional the corresponding azimuth parameter shall be omitted.

The CSP must deliver the most accurate location concerning the intercepted mobile network connection.

For the ASN.1 definitions see sections 6.5.1 or 6.5.2.

Delivering the location information in the way described in this clause obsoletes the delivery of the Cell-ID correlation table as described in section 6.3.9.2.

6.3.9.2 Provisioning of Cell-ID Correlation Tables

This section describes a Swiss proprietary method for the Location Function on Mobile

Networks (circuit switched and packet switched domains).

This method derives the geographical Location Information from a CGI or ECGI making use of the so-called "Cell-ID Correlation Table". This method obsoletes the passing of the "real" geographical location information across the handover interface HI2 e.g. GSMLocation or UMTSLocation as defined in 6.3.9.1.

Following contents must be included in the Cell-ID correlation table:

1. Name of operator

2. Date of table delivery

3. Cell Global Identifier (CGI) or E-UTRAN CGI (ECGI)

4. Swissgrid CH1903+ coordinates of the antenna locations corresponding to each Cell-ID

5. Direction of the main beam of the antenna corresponding to each Cell-ID: The beam direction angle refers to the mapped 2-dimensional horizontal middle compass angle (in degrees 0-360) of the corresponding cell sector. In case of an umbrella sector, the value –1 must be inserted in this field. When a cell has several main beam directions or when the main beam characteristic is not applicable for the radio access

technology, the main beam direction information shall be set to the value -1.

6. Full postal address (if available)

The first row of the table is reserved as follows:

1. Name of operator (1st column)

2. Date of table delivery (2nd column) as follows: ddmmyyyy