Section: 9.9.3.64 IMSI offset
Content: The purpose of the IMSI offset information element is to indicate an IMSI offset value that is used for calculating an alternative IMSI value as specified in 3GPP TS 23.401[ General Packet Radio Service (GPRS) enhancements for Evolved Universal Terrestrial Radio Access Network (E-UTRAN) access ]  [10] that is used for deriving the paging occasion as specified in 3GPP TS 36.304[ Evolved Universal Terrestrial Radio Access (E-UTRA); User Equipment (UE) procedures in idle mode ]  [21]. The IMSI offset information element is coded as shown in figure 9.9.3.64.1 and table 9.9.3.64.1. The IMSI offset is a type 4 information element with a length of 4 octets. Figure 9.9.3.64.1: IMSI offset information element Table 9.9.3.64.1: IMSI offset information element