| 摘要 |
The present invention relates to a method of soft handover in mobile access network using packet transmission, in which a mobile host has a plurality of active soft handover connections (macrodiversity) to the access network, those connections having respective independent ratio paths from the mobile host (MS) to a splitting/recombination node (RNC) of the mobile access network, each radio path having a radio channel to/from the mobile host (MS) to the node (BS, Node B) of the mobile access network which is in radio signal communication with the mobile host (MS), and a transport channel to/from that radio signal communication node (BS, Node, B) to the splitting/recombination node (RNC). In the method the quality of the radio channel is measured at the radio communication signal node (BS, Node B) concerned, for each of the soft handover radio paths; a transport priority decision is made in the splitting/recombination node (RNC), the decision giving higher priorities to the soft handover connection having higher quality radio channels; packet classification is effected at the or each sending node, a sending node being a radio signal communications node (BS, Node B) in the uplink direction, and the sending node being the splitting/recombination node (RNC) in the downlink direction, each packet to be sent being marked according to the assigned priority level of the radio channel via which it has travelled or is to travel; and buffer management is effected in all nodes handling the marked packets, in accordance with the assigned priority levels of the packets, to ensure that a lewer loss ratio is experienced by by higher priority packets. The present invention also provides a soft handover system.
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