Mobile communication system and communication method thereof

Abstract

A communication method in a mobile communication system that copies and transmits data, to which transmission sequence numbers have been attached, over a plural i ty of paths from a mobile station to a radio network controller via a plurality of base stations; where the radio network controller monitors the communication state of each path, determines to transmit the data over all of a plural i ty of paths, transmit the data over two or more specified paths, or transmit the data over only one specified path, based on the communication state of each path, and notifies the mobile station of the determined path / paths; and where the mobile station transmits said copied data over said notified path / paths.

Description

technical field [0001] The present invention relates to a mobile communication system and a communication method thereof, and more particularly, the present invention relates to duplicating and transmitting from a mobile station to each of a plurality of paths to a radio network control device via a plurality of base stations during handover A mobile communication system and a communication method thereof to which data of a transmission sequence number are added. Background technique [0002] The W-CDMA mobile communication system is a radio communication system in which a plurality of users share a line, and, as shown in FIG. 14, it includes: a core network (CN) 1, a radio network controller (RNC) 2, 3, Node B) 4 1 to 4 3 、5 1 to 5 3 , and the mobile station (UE: User Equipment) 6 1 to 6 3 . A radio network controller RNC and a radio base station (Node B) are connected by a wired connection using an ATM network or an IP network, and a radio base station (Node B) and ...

AI Technical Summary

Problems solved by technology

[0020] The second problem is that the data to be processed by the MAC-es processing unit of RNC2 increases

In order to perform selective combination of data, it is necessary to hold input data in a buffer, however, when the amount of data transmitted from the mobile station 6 is large, the amount of buffered data becomes extremely large, requiring a large amount of processing

As a result, there is a problem that the cost of RNC2 increases, and the size of RNC2 also increases

[0023] The third problem is that the power consumed by the mobile station to transmit data increases

Therefore, there is a problem that a large amount of power is required for the mobile station 6 to transmit data

However, this prior art does not solve the aforementioned problems caused by sending data via multiple paths

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