To accommodate multimedia and broadband mobile services, future mobile communication networks are likely to be integrated with broadband fixed networks. Previous MAN-based architectures may be rather complex to provide various isochronous/non-isochronous services due to complicated slot generation processings. We propose a broadband personal communication network (BPCN) architecture based on B-ISDN/ATM. We employ simple cell based add-drop multiplexers (ADMs) instead of rather complex medium access control systems. We also suggest a ring management scheme. After describing call processing procedures, we calculate and compare the signaling processing loads at the various nodes and the signaling loads on the various links for six types of configurations according to the locations of basestation controller (BSC), visitor location register (VLR), and mobile switching center (MSC). These results may be utilized in designing BPCNs in the given conditions, such as PCN subscriber environments and the capabilities of network entities. A 150 Mbps-dual ring can support the maximum carried traffic load of about 5,500 on-off voice traffic in the case that 300 connections are supported in the ring node (RN). This ring capacity corresponds to covering approximately 180 cells, if we assume 30 connections per cell.