Multi-carrier base station configured to provide wireless communication access to wireless communication terminals (119, 121, 124, 125), the multi-carrier base station comprising: a base transceiver station, BTS, configured to be connectable to a core network; a tethering access point; at least one antenna (130, 131); the BTS being configured to provide at least a first carrier via the at least one antenna for 3GPP wireless access to a first set of wireless communication terminals (119, 121) for 3GPP communication via the core network; the BTS further being configured to provide, to the tethering access point via a wired connection, at least a second carrier; the tethering access point comprising: a 3GPP access module configured to receive said at least a second carrier; a non-3GPP access module configured to provide non-3GPP wireless access to a second set of wireless communication terminals (124, 125) via the at least one antenna (130, 131); and a tethering module to provide connectivity between the 3GPP access module and the non-3GPP access module for tethering the second set of wireless communication terminals (124, 125) to the tethering access point; wherein the at least one second carrier is exclusively being used by the tethering access point for core network backhauling of non-3GPP access signalling for the second set of wireless communication terminals (124, 125) only, and not being carried over an air interface via said at least one antenna (130, 131); the multi-carrier base station further comprising: a modem configured to be connectable to the core network; a processing unit configured to process baseband signals received from, and transmitted to, the modem; and a radio frequency front end, RF-FE, module configured to convert said at least a first and a second carrier at baseband received from the processing unit to radio frequency and further to convert said at least a first and a second carrier at radio frequency into baseband to be sent to the processing unit. a base transceiver station, BTS, configured to be connectable to a core network; a tethering access point; at least one antenna (130, 131); the BTS being configured to provide at least a first carrier via the at least one antenna for 3GPP wireless access to a first set of wireless communication terminals (119, 121) for 3GPP communication via the core network; the BTS further being configured to provide, to the tethering access point via a wired connection, at least a second carrier; the tethering access point comprising: a 3GPP access module configured to receive said at least a second carrier; a non-3GPP access module configured to provide non-3GPP wireless access to a second set of wireless communication terminals (124, 125) via the at least one antenna (130, 131); and a tethering module to provide connectivity between the 3GPP access module and the non-3GPP access module for tethering the second set of wireless communication terminals (124, 125) to the tethering access point; wherein a 3GPP access module configured to receive said at least a second carrier; a non-3GPP access module configured to provide non-3GPP wireless access to a second set of wireless communication terminals (124, 125) via the at least one antenna (130, 131); and a tethering module to provide connectivity between the 3GPP access module and the non-3GPP access module for tethering the second set of wireless communication terminals (124, 125) to the tethering access point; wherein the at least one second carrier is exclusively being used by the tethering access point for core network backhauling of non-3GPP access signalling for the second set of wireless communication terminals (124, 125) only, and not being carried over an air interface via said at least one antenna (130, 131); the multi-carrier base station further comprising: a modem configured to be connectable to the core network; a processing unit configured to process baseband signals received from, and transmitted to, the modem; and a radio frequency front end, RF-FE, module configured to convert said at least a first and a second carrier at baseband received from the processing unit to radio frequency and further to convert said at least a first and a second carrier at radio frequency into baseband to be sent to the processing unit. a modem configured to be connectable to the core network; a processing unit configured to process baseband signals received from, and transmitted to, the modem; and a radio frequency front end, RF-FE, module configured to convert said at least a first and a second carrier at baseband received from the processing unit to radio frequency and further to convert said at least a first and a second carrier at radio frequency into baseband to be sent to the processing unit.