A telecommunication system (102, 202) that is remotely located from an external base-station entity (104, 204, 502) or base-station component, the telecommunication system (102, 202) comprising: an interface (210, 214, 220) with circuitry configured to communicate with the external base-station entity (104, 204, 502) or base-station component; a plurality of spatially separated radio units (112, 212, 512) that are communicatively coupled to the interface (210, 214, 220) via an aggregation unit (108, 208, 510), wherein the radio units (112, 212, 512) are positionable in an area for providing wireless coverage to terminal devices; the aggregation unit (108, 208, 510) communicatively coupleable between the interface (210, 214, 220) and the plurality of radio units, the aggregation unit (108, 208, 510) being physically separated from the radio units (112, 212, 512); and a low-layer processing module (116, 214, 300, 400, 516, 518, 526, 528, 530, 532) in at least one of the aggregation unit or a radio unit (112, 212, 512) of the plurality of radio units (112, 212, 512), the low-layer processing module (116, 214, 300, 400, 516, 518, 526, 528, 530, 532) configured to perform physical layer processing that is split between uplink physical layer processing and downlink physical layer processing, wherein data demodulation and decoding is performed as part of secondary uplink physical layer processing at the aggregation unit (108, 208, 510), wherein the decoded data is sent via an uplink media access control/physical, MACPHY, interface to a message router, the message router being part of the interface configured to communicate with the external base station entity or base station component, and wherein radio frequency processing is performed as part of primary uplink physical layer processing at the plurality of radio units (112, 212, 512). an interface (210, 214, 220) with circuitry configured to communicate with the external base-station entity (104, 204, 502) or base-station component; a plurality of spatially separated radio units (112, 212, 512) that are communicatively coupled to the interface (210, 214, 220) via an aggregation unit (108, 208, 510), wherein the radio units (112, 212, 512) are positionable in an area for providing wireless coverage to terminal devices; the aggregation unit (108, 208, 510) communicatively coupleable between the interface (210, 214, 220) and the plurality of radio units, the aggregation unit (108, 208, 510) being physically separated from the radio units (112, 212, 512); and a low-layer processing module (116, 214, 300, 400, 516, 518, 526, 528, 530, 532) in at least one of the aggregation unit or a radio unit (112, 212, 512) of the plurality of radio units (112, 212, 512), the low-layer processing module (116, 214, 300, 400, 516, 518, 526, 528, 530, 532) configured to perform physical layer processing that is split between uplink physical layer processing and downlink physical layer processing, wherein data demodulation and decoding is performed as part of secondary uplink physical layer processing at the aggregation unit (108, 208, 510), wherein the decoded data is sent via an uplink media access control/physical, MACPHY, interface to a message router, the message router being part of the interface configured to communicate with the external base station entity or base station component, and wherein radio frequency processing is performed as part of primary uplink physical layer processing at the plurality of radio units (112, 212, 512).