Abstract: A wireless communication system comprises a root component connected in a host device and directly coupled to an upstream bus unit, wherein the upstream bus unit is configured to maintain a first configuration space and a copy of a second configuration space, the first configuration space bridge includes at least hot-plug registers specifying at least capabilities and status of a slot of the upstream bus unit; and at least one endpoint component connected to at least one peripheral device and directly coupled to a downstream bus unit that communicates with the host bridge over a distributed link established over a distributed peripheral component interconnect express (PCIe) bus, wherein the downstream bus unit is configured to maintain the second configuration space; the second configuration space includes at least hot-plug registers specifying at least capabilities and status of a slot of the downstream bus unit.