Gradual network system and data transmission method when the system switchover

Abstract

The invention discloses an evolution network system and its data transmission method during switching. The system includes Access Gateway, at least two evolution base stations and terminals, in which, Access Gateway and terminals transmit data through evolution base station that includes switching-decision module used to select switching data transmission method according to business model, cache data size and channels quality, and transmit data to the terminals or other base stations by this method. The base station also includes transmission-decision module, used to decide whether to pause transmission and immediately implement switch according to the parameters of channel quality in the process of switching data. The invention also discloses a data transmission method. It based on different circumstances chooses different switching data transmission method, reducing lost data during the process of network switching.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to an evolved network and a method for data transmission when the evolved network is switched. Background technique [0002] Considering the competitiveness of future networks, 3GPP is studying a new evolved network architecture to meet the application requirements of mobile networks in the next ten years or even longer, including the evolution of system architecture (System Architecture Evolution, SAE) and access network Long Term Evolution (Long Term Evolution, LTE). The evolved network is also called an evolved UMTS terrestrial radio access network (Evolved UMTS Terutorial Radio Access Network, E-UTRAN). The goal of network evolution is to provide a low-latency, high data rate, high system capacity and coverage, low-cost, completely IP-based network. Since it is a brand new network architecture, all nodes, functions and processes of the existing architecture will u...

AI Technical Summary

Problems solved by technology

As shown in Figure 6, but in fact, part of SDU2 may have been delivered to the terminal. It is a waste if the target evolved base station sends it again, that is, if it forwards to the target evolved base station and retransmits the data Sending SDU data waiting for confirmation will cause the terminal to repeatedly receive part of the received PDU data

[0020] If there is no backup SDU data, the PDU data must be forwarded to ensure no loss, which will inevitably forward the internal format data of the PDU of the source evolved base station to the target evolved base station, and the forwarding of the internal data of the PDU requires additional encapsulation, and the source The internal data format of the evolved base station is often different from the internal data format of the target evolved base station, which will cause cumbersome data processing between the two evolved base stations, and even data transmission errors.

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