ation. Firstly, the network can modify the measurements and triggering criteria of the UE. Secondly, a neighbour list is sent on a measurement control message. In the case of SHO the neighbour list needs to be combined from individual cell neighbour lists participating in the SHO. The UE evaluates network quality (Ec/10) to determine whether handover should be triggered. If the radio conditions change and triggering conditions are fulfilled the UE sends an event to the network. The event tells what conditions have triggered the handover. When the triggering conditions are valid the UE sends events in regular intervals; this is called periodical measurement reporting. If the UE sends only information that a defined measurement triggering condition is true, this is called event based measurement reporting. As the conditions to trigger the SHO are mobile evaluated, and it is the mobile requesting the SHO, the SHO is a mobile evaluated handover (MEHO). The UE measurement reports are sent to the RNC and the handover decision is made in the RNC. If the admission control or resource manager functions of the RNC confirm that there are resources to add another radio link, the RNC allocates a new radio link from a requested neighbour to the UE. The availability of channel cards is also needed due to extra transmissions across lub (BTS-RNC). If resources are available, the RNC sends an active set update command to the UE using the existing radio link(s). The UE confirms that it has received the command and starts receiving using the new radio link. As there is now a new serving cell the network sends a new combined neighbour list to the UE to monitor. The neighbour list defines the possible cells that the mobile can try to make an SHO. The objectives of an SHO are: optimum fast closed loop PC as the terminal is always connected to the; best cell; seamless HO with no disconnections of the RAB (radio access bearer); Diversity gain by combining the received signals from different sectors; Better coverage; Less transmission pow