Section: 8.51.7 gNodeB ID
Content: The Target Type is gNodeB ID for an EPS to 5GS handover to a target gNodeB. In this case the coding of the Target ID field shall be coded as depicted in Figure 8.51.7-1. Figure 8.51.7-1: Target ID for Type gNode ID The gNodeB ID Length field, in bits 1 to 6 of octet 9, indicates the length of the gNodeB ID in number of bits. The gNodeB ID consists of 22 to 32 bits. The coding of the gNodeB ID is the responsibility of each administration. Coding using full hexadecimal representation (binary, not ASCII encoding) shall be used. Bit 1 of Octet 13 is the least significant bit. The most significant bit is determined as follows: - if the gNodeB ID Length is 32, bit 8 of octet 10 is the most significant bit; - if the gNodeB ID Length is 24, bit 8 of octet 11 is the most significant bit; all the bits of octet 10 shall be set to 0 by the sender and ignored by the receiver; - if the gNodeB ID Length is between 22 and 31, other than 24, the most significant bit is the bit determined by the operation "gNodeB ID Length modulo 8", of octet 10 if the length is greater than 24, or of octet 11 if the length is smaller than 24. All the bits from bit 8 of octet 10 down to the most significant bit (excluded) shall be set to 0 by the sender and ignored by the receiver. The 5GS TAC consists of 3 octets. Bit 8 of Octet 14 is the most significant bit and bit 1 of octet 16 the least significant bit. The coding of the tracking area code is the responsibility of each administration. Coding using full hexadecimal representation (binary, not ASCII encoding) shall be used.