Patent ID: 8788629
Filing Date: 2014-07-22
Classification: H04L

Abstract:
1. A method of operating a plurality of rendezvous servers to provide a Host Identity Protocol, HIP, based mobility service to HIP nodes, the method comprising: arranging the rendezvous servers in a hierarchical branching structure; for each of the HIP nodes, registering a Host Identity Tag, HIT, and contact address mapping with a rendezvous server, and identifying to each higher level rendezvous server within the same branch of the hierarchical structure the HIT and a neighbouring or other lower level rendezvous server within the branch, without explicitly identifying the contact address to the higher level rendezvous servers, wherein in use, when a first rendezvous server receives a HIP I1 message addressed to a destination HIT, if the first rendezvous server is unaware of the destination HIT of the HIP I1 message, the first rendezvous server forwards the HIP I1 message to a higher level rendezvous server within the same branch, and if the first rendezvous server is not the rendezvous server at which the destination HIT is registered but is aware of the destination HIT, the first rendezvous server forwards the HIP I1 message to a neighbouring or other lower level rendezvous server corresponding to the destination HIT.