Sorting CDRs means filtering and classifying the CDRs generated by the GSN/UGW based on some conditions. For example, the CG9812 can sort the CDRs of different types based on the CDR type field, store the CDRs of each type in a separate channel, and then send the CDRs of each type to the BS.

A sorting condition refers to a customized formula that determines the CDRs that are stored in the specified channel. The formula supports such expressions as ==, !=, >, >=, <, and <=. Each channel corresponds to a sorting condition.

By executing the customized sorting condition formula, the CDR processing module sorts CDRs. Figure 1 shows the principle for sorting CDRs. In general, sorting conditions are different and have priority. Original CDRs are filtered based on sorting condition 1 first. After the original CDRs that meet sorting condition 1 are processed, final CDRs are generated and stored in channel 1. The CDRs that do not meet sorting condition 1 are filtered based on sorting condition 2. In the same way, the CDRs continue to be filtered based on sorting condition n. The CDRs that do not meet all the sorting conditions are stored in the default channel.

Figure 1 Principle for sorting CDRs
http://localhost:7904/pages/31184372/01%20%282010-03-10%29/31184372/01%20%282010-03-10%29/resources/description/figure/fg_050302_01.png

Technically very sound...........

useful document, thanks