12.28 LSA Parameters

3GPP44.060General Packet Radio Service (GPRS)Mobile Station (MS) - Base Station System (BSS) interfaceRadio Link Control / Medium Access Control (RLC/MAC) protocolRelease 17TS

The LSA Parameters information element is used for cell reselection by SoLSA mobile stations. The IE contains a list of LSA_ID(s) corresponding either to the entries in the ‘Add Frequency list struct’ defined in the Packet Cell Change Order message and in Packet Measurement Order message or to the entries in the Neighbour Cell Parameters when used in the packet System Information 3 and 3bis messages. Some entries in the ‘LSA parameters IE’ may be empty. In case there are too few entries in the ‘LSA parameters IE’, empty entries shall be added at the end. In case there are too many entries in the ‘LSA parameters IE’, the last shall be discarded.

Table 12.28.1: LSA Parameters information element

< LSA Parameters IE > ::= < NR_OF_FREQ_OR_CELLS : bit (5) >: { < LSA ID information : < LSA ID information struct >> * (val(NR_OF_FREQ_OR_CELLS)) };

< LSA ID information struct > ::= { 1 { 0 < LSA_ID : bit (24) > |1 < ShortLSA_ID : bit (10) >} } ** 0 ;

Table 12.28.2: LSA Parameters information element details

LSA_ID (24 bit field) The purpose of the LSA_ID field is to identify a LSA. The LSA ID value field is coded as specified in 3GPP TS 23.003. Short LSA_ID (10 bit field) The purpose of the Short LSA_ID field is to identify a LSA. The LSA ID defined by the Short LSA_ID is a LSA_ID as specified in 3GPP TS 23.003 with bit 0 set to "0" bit 1 to 10 set to the value of the Short LSA_ID field (LSB in bit 1, MSB in bit 10) and bit 11 to 23 set to "0".