Section: 8.75 User CSG Information (UCI)
Content: User CSG Information (UCI) is coded as depicted in Figure 8.75-1. The CSG ID is defined in 3GPP TS 23.003[ Numbering, addressing and identification ]  [2]. Figure 8.75-1: User CSG Information For two digits in the MNC, bits 5 to 8 of octet 6 are coded as "1111". The CSG ID consists of 4 octets. Bit 3 of Octet 8 is the most significant bit and bit 1 of Octet 11 is the least significant bit. The coding of the CSG ID is the responsibility of the operator that allocates the CSG ID by administrative means. Coding using full hexadecimal representation (binary, not ASCII encoding) shall be used. Access mode values are specified in Table 8.75-1. Table 8.75-1: Access mode values and their meanings Leave CSG flag (LCSG) shall be set to "1" if UE leaves CSG cell/Hybrid cell, and in this case, the receiving node shall ignore the rest information in the IE. CSG Membership Indication (CMI) values are specified in Table 8.75-2. CMI shall be included in the User CSG Information if the Access mode is Hybrid Mode. For the other values of Access Mode, the CMI shall be set to 0 by the sender and ignored by the receiver. Table 8.75-2: CSG Membership indication (CMI) NOTE: Due to a specification oversight, the CMI values in the above table are reversed from the values of the CMI IE (see clause 8.79). Furthermore, the encoding is different between GTPv1 and GTPv2.