What is CoMP?
CoMP is a multi-cell cooperation technique where multiple base station transmission/reception points coordinate to improve coverage at cell edges and reduce inter-cell interference. UEs at cell boundaries can simultaneously receive from — or transmit to — multiple cells, dramatically improving edge throughput.
How Does CoMP Work
CoMP requires sharing of Channel State Information (CSI) and user data between coordinated cells via the Xn interface. Downlink CoMP schemes include Joint Processing (JP — multiple cells send the same data) and Coordinated Scheduling/Beamforming (CS/CB — cells coordinate to avoid interfering with each other’s users). Uplink CoMP involves multiple cells jointly receiving the same UE transmission and combining the signals.
Use Cases
Improving cell-edge user throughput in dense networks, reducing inter-cell interference in heterogeneous networks (HetNets), enabling seamless handover in high-mobility scenarios.
3GPP / Standards Reference
3GPP TS 36.819 (CoMP Study for LTE), TS 38.174 (NR Multi-TRP Operation)
Related Terms
C-RAN | Massive MIMO | CSI | Xn Interface | RAN
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