This part of ISO/IEC TR 29181 describes the problem statements of current network and the requirements for Future Network in the mobility perspective. This part of ISO/IEC TR 29181 mainly specifies — problems of the current network in mobile environment, and — requirements for mobility support in Future Network. In addition, this part of ISO/IEC TR 29181 gives information on — existing mobility control schemes in the current network, — examples of high-level mobility control architecture for Future Network, — distributed mobility control in the Proxy Mobile IPv6 networks, and — additional considerations for Future Network mobility.