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A data transmission method and device
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A data transmission method and a data transmission technology, which are applied in the field of data transmission methods and devices, can solve the problems of increasing air interface resource occupation, increasing signaling load, and reducing NB-IoT system support for massive IoT terminals, etc.
Active Publication Date: 2020-09-25
DATANG MOBILE COMM EQUIP CO LTD
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Problems solved by technology
[0006] The present invention provides a data transmission method and device to solve the problem that adopting the UP scheme in the existing network will increase the suspended / resume process and the probability of off-network re-search, increase the signaling load, increase the resources occupied by the air interface, and reduce the massive support of the NB-IoT system. The problem of the ability of IoT terminals
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Embodiment 1
[0021] Reference figure 1 , Shows a flow chart of the steps of a data transmission method provided by an embodiment of the present invention, which may specifically include the following steps:
[0022] Step 101: Determine whether the terminal is currently a high-speed mobile terminal.
[0023] In the embodiment of the present invention, it can be applied to the NB-IoT system, and is an optimized solution for data transmission using the UP solution for terminals that are moving at a high speed (for example, in a scenario such as a railway).
[0024] In the scenario where the terminal is moving at a high speed, since the moving speed of the terminal is relatively fast, the residence time in a certain cell is relatively short. Therefore, it is necessary to first determine whether the terminal is currently moving at a high speed (such as high-speed rail).
[0025] In a preferred embodiment of the embodiment of the present invention, after the above step 101, it may further include:
[0026...
Embodiment 2
[0068] Reference figure 2 , Shows a schematic structural diagram of a data transmission device provided by an embodiment of the present invention, which may specifically include:
[0069] The high-speed movement state judgment module 210 is used to judge whether the terminal is currently in a high-speed movement state;
[0070] The highest priority setting module 220 is configured to preset the highest priority of the terminal when the terminal is in a high-speed moving state;
[0071] The data transmission service judgment module 230 is used to judge whether the terminal has a data transmission service in the current cell;
[0072] The determining module 240 is configured to determine whether the channel quality of the terminal is lower than a preset threshold when the terminal has data transmission services in the current cell;
[0073] The service suspension module 250 is configured to receive the terminal offline information returned by the base station when the channel quality of...
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Abstract
The invention provides a data transmission method and a data transmission device. The data transmission method comprises the following steps: judging whether the terminal is currently in a high-speedmoving state or not, and presetting the highest priority of the terminal if the terminal is in the high-speed moving state; judging whether the terminal has a data transmission service in the currentcell or not; if the data transmission service exists, judging whether the channel quality of the terminal is lower than a preset threshold value or not; if the channel quality of the terminal is lowerthan a preset threshold value, receiving terminal offline information returned by the base station, and suspending the data transmission service of the terminal; performing an idle state cell reselection process on the terminal; and after the cell reselection succeeds, recovering the data transmission service of the terminal in the new cell. According to the embodiment of the invention, the probability of a Suspended / Resume process and off-network re-search is reduced, and the signaling load is reduced, so that the capability of the NB-IoT system to support a large number of Internet of Things terminals is improved.
Description
Technical field [0001] The present invention relates to the field of communication technology, in particular to a data transmission method and device. Background technique [0002] With the development of communication technology, the Internet of Everything is becoming more and more important in life. The narrowband cellular Internet of Things (NB-IoT) system is currently being widely deployed and applied. It has wide coverage, large connections, low cost, and low power consumption. Features, suitable for IoT terminals with low service delay sensitivity, small transmission data volume, and weak mobility. In terms of mobility, the NB-IoT system supports the same-frequency / different-frequency cell reselection in the idle state and intra-system redirection, but does not support measurement and handover. [0003] In terms of data transmission, two optimization schemes are introduced: Control Plane Optimization (CP) and User Plane Optimization (UP). The CP scheme carries user data thro...
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