Scenario: R/3 -> XI -> Third Party System: Manage queues

Hi to all,

my scenario is: an R/3 system which extract some datas -> XI -> datas are used in a third party system. In R/3 system I did a custom program which extracts datas and send them to abap proxy, this program is used by a key user who can execute it more times quickly, and I'd like put these executions in queues so that they are precessed one after one. Is this possible? Is there a function module in R/3 system to manage queues for my purpose?

Thank you very much and sorry for my english...

Antonio