Mobile communication system and method of data dispersion in said system

Abstract

In a mobile communication system, which has a plurality of radio network controllers and a number of radio base stations connected to each of the radio network controllers, for sending and receiving user data between a host network and mobile stations via the radio network controllers and radio base stations, a plurality of transmission paths that pass through one or more radio network controllers are set up between a base station, which sends and receives radio signals to and from a mobile station, and the host network. When data is being sent and received using one transmission path from the host network to a base station through a radio network controller, traffic conditions on this transmission path are monitored. When traffic has increased, the user data is dispersed by being passed through a plurality of transmission paths.

1 . A mobile communication system having a mobile station and a plurality of nodes that are provided in a mobile communication network, communicate with the mobile station and include first and second node, wherein:
 the first node requests the second node to send the mobile station• data that is destined for the mobile station and delivered through a first transmission path from the first node to the second node, that is different from a second transmission path;   the second node, in accordance with the request from the first node, receives data destined for the mobile station from the first node through the first transmission path and receives another data destined for the mobile station through the second transmission path respectively and sends the both data to the mobile station; and   the mobile station receives from the second node said data that are delivered to the second node through the first and second transmission paths.   
     
     
         2 . The mobile communication system according to  claim 1 , wherein,
 the second node establishes the first transmission path in conformity with the request from the first node and returns a response for the request to the first node.   
     
     
         3 . The mobile communication system according to  claim 1 , wherein,
 the number of nodes which are contained in the first transmission path is different from the number of nodes which are contained in the second transmission path.   
     
     
         4 . The mobile communication system according to  claim 1  wherein,
 the first node is a node that handles data destined for the mobile station before handover and the second station is a node that is to be handled newly the data destined for the mobile station after handover, and 
 the first node, during the handover, requests the second node to send the mobile station the data that is destined for the mobile station. 
 
     
     
         5 . A mobile station that communicates with a plurality of nodes that are provided in a mobile communication network and includes first and second node, wherein:
 the mobile station receives from the second node data destined for the mobile station that is delivered to the second node through a first transmission path and a second transmission path wherein   the first node requests the second node to send the mobile station data that is destined for the mobile station and delivered through a first transmission path from the first node to the second node, that is different from a second transmission path; and   the second node, in accordance with the request from the first node, receives data destined for the mobile station from the first node through the first transmission path and receives another data destined for the mobile station through the second transmission path respectively and sends the both data to the mobile station.   
     
     
         6 . A mobile communication system having a mobile station and a plurality of node that are provided in a mobile communication network, communicate with the mobile station and include first and second node, wherein:
 the first node requests the second node to send the mobile station data that is destined for the mobile station and delivered through a first transmission path from the first node to the second node that is different from a second transmission path; and   the second node, in response to the request from the first node, establishes said first transmission path in addition to said second transmission path.   
     
     
         7 . A node that is provided in a mobile communication network and communicates with a mobile station, comprising:
 a controller configured to decide whether data destined for the mobile station is to be dispersed to plural transmission paths; and   a transmitting unit, in conformity with the decision by the controller, configured to request other node to send the mobile station data that is destined for the mobile station and delivered to the other node through a first transmission path from its own node to the other node, that is different from a second transmission path.   
     
     
         8 . A node that is provided in a mobile communication network and communicates with a mobile station, comprising:
 a receiving unit from other node receives a request that requests to send the mobile station data that is destined for the mobile station data that is destined for the mobile station and delivered through via a first transmission path from the other node to its own node, that is different from a second transmission path; and a controller, in response to the request from the other node, establishes said first transmission path in addition to said second transmission path.