A method of radio resource management in a wireless communication network in which radio identities allocable by the network from a finite set of radio identities are used for differentiating individual radio connections between a network node (12, 40) and respective wireless nodes, said method implemented by the network node (12, 40) in the network and comprising: assigning a first radio identity that is associated with a first service area in the network to a first wireless node for operation in the first service area; transferring use of the first radio identity from the first service area to a second service area, and thereby using the first radio identity to continue the radio connection with the first wireless node in conjunction with the first wireless node moving from the first service area to the second service area; and deferring any new assignment of the first radio identity within the first service area until termination of a lending period, associated with the lent radio identity, governing the transfer of the first radio identity, wherein the network node (12, 40) further comprises a first radio network node associated with the first service area, and wherein transferring the first radio identity comprises the first radio network node sending lending signaling to a second radio network node associated with the second service area, said lending signaling including an indication of the first radio identity, wherein the lending signaling is sent using a communications interface (22, 42) in the network node (12, 40), the method further comprises indicating in said lending signaling one or more limitations restricting at least one of: how long the first radio identity may be used in the second service area for the first wireless node; and whether or to what extent the first radio identity can be transferred from the second service area for continued use of the first radio identity for the first wireless node in a further service area. assigning a first radio identity that is associated with a first service area in the network to a first wireless node for operation in the first service area; transferring use of the first radio identity from the first service area to a second service area, and thereby using the first radio identity to continue the radio connection with the first wireless node in conjunction with the first wireless node moving from the first service area to the second service area; and deferring any new assignment of the first radio identity within the first service area until termination of a lending period, associated with the lent radio identity, governing the transfer of the first radio identity, wherein the network node (12, 40) further comprises a first radio network node associated with the first service area, and wherein transferring the first radio identity comprises the first radio network node sending lending signaling to a second radio network node associated with the second service area, said lending signaling including an indication of the first radio identity, wherein the lending signaling is sent using a communications interface (22, 42) in the network node (12, 40), the method further comprises indicating in said lending signaling one or more limitations restricting at least one of: how long the first radio identity may be used in the second service area for the first wireless node; and whether or to what extent the first radio identity can be transferred from the second service area for continued use of the first radio identity for the first wireless node in a further service area.