| 摘要 |
Various advantageous arrangements for use with the proposed SAE/LTE or 4G mobile telecommunications system are disclosed. An arrangement for allowing a mobile terminal/UE (1) to transmit data packets to duplicate access points (5) is disclosed. An IP combiner (20) receives the duplicate data packets from the respective access points (5), together with quality indicators, and determines which data packet should be passed onwardly to the network. An arrangement is also disclosed which allows a particular MME (7) (corresponding to the 3G SGSN) to be selected for a particular access point (5). A particular MME may be selected depending on various criteria, such as to distribute the load evenly between the MMEs (7) of the network or to take a particular MME (7) out of service temporarily in a managed manner. Further, an arrangement is disclosed which enables the more rapid establishment of the user plane bearer between the mobile terminal/UE (1) and the network. In the arrangement the control plane is subsequently established through the already established user plane. This may reduce the start-up delay significantly. Additionally, various security features are disclosed. For example, an access point (5) is disclosed which has incorporated therein or associated therewith a smart card (15A), which is analogous to a SIM or USIM used with a 2G, 2.5G or 3G network. This allows the access point (5) to be authenticated with a security store (30) of the network in a similar manner to which a SIM or USIM of a mobile terminal/UE is authenticated with the network in a 2G, 2.5G or 3G mobile telecommunications network. A split ciphering architecture is also discussed where three separate cipher links are provided: a ciphered Non-Access Stratum control plane, a ciphered Access Stratum control plane and a ciphered user plane.
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