A method for managing bandwidth in a cellular telecommunication system comprising: - a radio access part comprising a plurality of base stations enabling user equipment to access services of the cellular telecommunication system for which radio bearers have to be set up; and - a core network part comprising quality-of-service policy control equipment connected via a first connection to a gateway via which said radio bearers are set up in order to access said services of the cellular telecommunication system; characterised in that, at least one base station being remotely set by wireless connection, proxy equipment included in the cellular telecommunication system performs the following steps: - intercepting on said first connection each session establishment or session update message transmitted between the quality-of-service policy control equipment and the gateway; - when said message does not concern a radio bearer involving a base station remotely set by a wireless connection, propagating said message to its initially targeted destination and, - when said message concerns at least one radio bearer involving a base station remotely set by wireless connection: - determining a remaining bandwidth via said wireless connection; - when the determined remaining bandwidth covers a bandwidth requirement expressed in said message, propagating said message to its initially targeted destination; and, - when the determined remaining bandwidth does not cover the bandwidth requirement, refusing, in place of the original destination of said message, the session establishment or update when the determined bandwidth does not cover a minimum bandwidth to be guaranteed expressed in said message, and otherwise modifying said message, before propagating it to its initially targeted destination, indicating a bandwidth requirement no more than the remaining bandwidth. - a radio access part comprising a plurality of base stations enabling user equipment to access services of the cellular telecommunication system for which radio bearers have to be set up; and - a core network part comprising quality-of-service policy control equipment connected via a first connection to a gateway via which said radio bearers are set up in order to access said services of the cellular telecommunication system; - intercepting on said first connection each session establishment or session update message transmitted between the quality-of-service policy control equipment and the gateway; - when said message does not concern a radio bearer involving a base station remotely set by a wireless connection, propagating said message to its initially targeted destination and, - when said message concerns at least one radio bearer involving a base station remotely set by wireless connection: - determining a remaining bandwidth via said wireless connection; - when the determined remaining bandwidth covers a bandwidth requirement expressed in said message, propagating said message to its initially targeted destination; and, - when the determined remaining bandwidth does not cover the bandwidth requirement, refusing, in place of the original destination of said message, the session establishment or update when the determined bandwidth does not cover a minimum bandwidth to be guaranteed expressed in said message, and otherwise modifying said message, before propagating it to its initially targeted destination, indicating a bandwidth requirement no more than the remaining bandwidth. - when the determined remaining bandwidth covers a bandwidth requirement expressed in said message, propagating said message to its initially targeted destination; and, - when the determined remaining bandwidth does not cover the bandwidth requirement, refusing, in place of the original destination of said message, the session establishment or update when the determined bandwidth does not cover a minimum bandwidth to be guaranteed expressed in said message, and otherwise modifying said message, before propagating it to its initially targeted destination, indicating a bandwidth requirement no more than the remaining bandwidth.