| 摘要 |
<p>A method is provided which introduces user plane caching over an interface between a first node in a radio access network and a second node in a core network. The method comprises, at the first node: receiving (S1) first uplink tunnel parameters relating to the second node, selecting (S2) first downlink tunnel parameters relating to the first node, sending (S3, S4) the first uplink and downlink tunnel parameters to a cache node designated to the first node, receiving (S5, S6) second uplink and downlink tunnel parameters relating to the cache node, and sending (S7) the second downlink tunnel parameters to the second node. This enables establishment of a second tunnel between the cache node and the second node based on the first uplink tunnel parameters and the second downlink tunnel parameters. The method further comprises establishing (S8) a first tunnel between the first node and the cache node based on the second uplink tunnel parameters and the first downlink tunnel parameters, sending (S9) uplink user plane data to the second node through the first and second tunnels via the cache node, and receiving (S10) downlink user plane data from the second node through the second and first tunnels via the cache node. This enables user plane data between the first and second nodes to be cached at the cache node.</p> |
