1. A method for determining an expiry time for a period during which a re-establishment of a lost radio connection between a mobile station and a network node of a cellular network is allowable, said radio connection having a plurality of active radio bearers belonging to a radio resource control connection, said method comprising: determining a first expiry time for a period during which the re-establishment of the lost radio connection in respect of said radio bearers that are used to provide a service or services of a first category is allowable, determining a second expiry time for a period during which the re-establishment of the lost radio, connection in respect of said radio bearers used to provide a service or services of a second category is allowable; wherein said second category of service is different than said first category of service, and said second expiry time is different than said first expiry time; and wherein the mobile station and said network node attempt to re-establish the lost radio connection before the first expiry time in respect of a radio bearer used to provide a service or services of the first category or before the second expiry time in respect of a radio bearer used to provide a service or services of the second category.