An uplink coordinated multipoint, UL-CoMP, method, the method being performed by a cooperating base station and comprising: receiving a UL-CoMP request from a serving base station, the UL-CoMP request requesting assistance from the cooperating base station, the UL-CoMP request specifying a first CoMP payload type the first CoMP payload type being one of: a time domain IQ, TD-IQ, samples payload; a frequency domain IQ, FD-IQ, samples payload; a log-likelihood ratio, LLR, payload; and a transport block, TB, payload; responsive to receiving the UL-CoMP request, determining a second type of CoMP payload type to provide to the serving base station based at least in part on a level of congestion on a backhaul link, wherein the CoMP payload type is a type of payload to send from the cooperating base station to the serving base station on the backhaul link that connects said the cooperating base station to the serving base station, the determining including: determining that the second CoMP payload type is the TD-IQ payload type when the level of congestion is less than a first threshold; determining that the second CoMP payload type is the FD-IQ payload type when the level of congestion is less than a second threshold that is greater than the first threshold; determining that the second CoMP payload type is the LLR payload type when the level of congestion is less than a third threshold that is greater than the second threshold; and determining that the second CoMP payload type is the TB payload type when the level of congestion is greater than the third threshold; and providing a CoMP payload of the determined second CoMP payload type to the serving base station. receiving a UL-CoMP request from a serving base station, the UL-CoMP request requesting assistance from the cooperating base station, the UL-CoMP request specifying a first CoMP payload type the first CoMP payload type being one of: a time domain IQ, TD-IQ, samples payload; a frequency domain IQ, FD-IQ, samples payload; a log-likelihood ratio, LLR, payload; and a transport block, TB, payload; a time domain IQ, TD-IQ, samples payload; a frequency domain IQ, FD-IQ, samples payload; a log-likelihood ratio, LLR, payload; and a transport block, TB, payload; responsive to receiving the UL-CoMP request, determining a second type of CoMP payload type to provide to the serving base station based at least in part on a level of congestion on a backhaul link, wherein the CoMP payload type is a type of payload to send from the cooperating base station to the serving base station on the backhaul link that connects said the cooperating base station to the serving base station, the determining including: determining that the second CoMP payload type is the TD-IQ payload type when the level of congestion is less than a first threshold; determining that the second CoMP payload type is the FD-IQ payload type when the level of congestion is less than a second threshold that is greater than the first threshold; determining that the second CoMP payload type is the LLR payload type when the level of congestion is less than a third threshold that is greater than the second threshold; and determining that the second CoMP payload type is the TB payload type when the level of congestion is greater than the third threshold; and determining that the second CoMP payload type is the TD-IQ payload type when the level of congestion is less than a first threshold; determining that the second CoMP payload type is the FD-IQ payload type when the level of congestion is less than a second threshold that is greater than the first threshold; determining that the second CoMP payload type is the LLR payload type when the level of congestion is less than a third threshold that is greater than the second threshold; and determining that the second CoMP payload type is the TB payload type when the level of congestion is greater than the third threshold; and providing a CoMP payload of the determined second CoMP payload type to the serving base station.