Method for estimating user moving speed
A technology of user movement and speed, applied in the field of communication, can solve problems such as excessive terminal movement speed deviation, user terminal switching times not proportional to user terminal moving distance, and distortion of the number of user terminal switching to a new destination base station.
Active Publication Date: 2008-07-30
XFUSION DIGITAL TECH CO LTD
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[0008] When estimating the moving speed of the UE based on the number of UE handovers, the number of handovers must be proportional to the moving distance of the user terminal. In the GSM system, a result consistent with the actual situation can be obtained; however, in the WCDMA system, due to the introduction of soft handover , it is easy to introduce ping-pong handover during handover, which will cause the number of times the user terminal actually handovers to the new destination base station to be distorted, resulting in that the number of handover times of the user terminal cannot be proportional to the moving distance of the user terminal, resulting in an excessive deviation of the estimated moving speed of the terminal Large, so that users cannot be reasonably scheduled, such as switching to a suitable layered cell, demodulation optimization, etc.
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[0032] In a real environment, due to changes in buildings and terrain, wireless signals are affected by fast fading and slow fading. Under the influence of these factors, when the UE is moving, there is also certain uncertainty in changing the optimal cell, and there may be frequent ping-pong behaviors. In order to eliminate the impact of the ping-pong behavior on estimating the moving speed of the user terminal, the present invention provides a method for estimating the moving speed of the user, the core of which is: within a set time period, the base station controller RNC The number of mobile behaviors of the user terminal is counted, and when it is confirmed that the current mobile behavior of the user terminal is a ping-pong behavior, the original counted number of mobile behaviors is kept; The distance between different base stations is used to estimate the mobile speed of the user.
[0033] The first embodiment provided by the present invention is to judge whether the ...
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The invention relates to a method for estimating the moving speed of user. Wherein, it is characterized in that: in preset time section, the base station controller RNC calculates the moving times of user terminal and assures said motion as ping-pong motion, to keep the former calculated moving times; RNC, according to the moving times in present time section and the distance from the user terminal to the different base stations, estimates the user moving speed. With said invention, the effect of ping-pong motion on the speed estimation can be eliminated; therefore, the wireless system with soft switch can accurately estimate the moving speed of user terminal, to make relative treatment on user, as switching into right region, etc.
Description
technical field [0001] The invention relates to the communication field, in particular to a method for estimating the moving speed of a user. Background technique [0002] Hierarchical cell technology is a technology developed along with the development of micro-cell and pico-cell technology. It mainly introduces microcells and picocells under macrocells to provide more "included" cells, forming a hierarchical cell structure of corresponding macrocells, microcells and picocells. [0003] Based on the wireless characteristics of wireless networks, such as WCDMA (Wide-band Code Division Multiple Access, wideband code division multiple access) network, the cell capacity is closely related to the coverage radius, and the micro cell has large capacity and small coverage radius, which is suitable for static and slow moving UEs (User Equipment), the capacity of the macro cell is small, the coverage radius is large, and it is suitable for UEs moving at high speed. [0004] In orde...
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IPC IPC(8): H04Q7/38H04W24/02H04W24/08
Inventor 聂际敏
Owner XFUSION DIGITAL TECH CO LTD