Switch trigger and judgment method and switch trigger and judgment system in indoor cellular network

Abstract

The invention relates to an information reporting switching and measuring method and an information reporting switching and measuring system through terminals in an indoor cellular network. The method is used for determining whether users in an indoor femtocell network report measured switching results to a source base station to carry out switching and decision-making. The method includes a first step of measuring strength of pilot signals of target base stations and the source base station and switching delay of the target base stations, a second step of enabling the obtained strength of the pilot signals to be subjected to first layer filtering process and third layer filtering process in sequence, a third step of predicting the outputted pilot signal strength after the third layer filtering process at a certain time in the future on the basis of the following formula according to the current pilot signal strength after the third layer filtering process and stored history pilot signal strength obtained through the third layer filtering process, and a fourth step of determining whether the switching information measured through the user terminals is reported to the source base station according to the current pilot signal strength and the predicated pilot signal strength output through the third filtering process in sequence. The method and the system can ensure that the completion of switching is carried out at an appropriate moment.

Description

technical field [0001] The present invention relates to the technical field of wireless communication networks, in particular to a handover triggering and judgment method and system in an indoor cellular network. Background technique [0002] At present, 70% of mobile data services take place in the indoor environment, and this proportion will continue to grow. There is a huge demand for indoor hotspot wireless coverage. Therefore, in addition to providing macrocell-level mobile coverage outdoors, mobile communication operators also provide indoor coverage with smaller coverage radius Femtocells (Femtocells) and picocells (Picocells), thus forming a multi-cell base station overlapping coverage Hybrid networking network architecture. [0003] Since the movement of the user in the indoor scene is dominated by the walking speed (that is, within 12km / h). For such scenarios where users move slowly, the 3GPP LTE-A standard proposes a requirement to further enhance user performan...

AI Technical Summary

Problems solved by technology

[0010] In order to solve the problem of handover delay, the method of handover prediction is one of the research hotspots, but there are some problems in its practical application: 1) The existing handover prediction algorithm does not fully consider its complexity and operability, so although a large number of The literature has verified the effectiveness of predictive handover algorithms in reducing handover delay and improving handover efficiency, but handover prediction algorithms have not yet been reflected in mobile communication standards; 2) Most of the existing research is based on user habitual motion patterns For the future location, since the Global Positioning System (GPS) cannot be applied in the indoor environment, the indoor base station cannot use GPS to effectively obtain the user's current motion pattern. Good for cellular networks that primarily provide indoor coverage

And the existing technology has the following problems: 1) The existing handover prediction algorithm does not fully consider its complexity and operability. Therefore, although a large number of documents have verified the effectiveness of the predictive handover algorithm in reducing handover delay and improving handover efficiency, However, the handover prediction algorithm has not yet been reflected in the mobile communication standard; 2) Most of the existing research is to predict the future position of the user based on the user's habitual motion pattern

Since the Global Positioning System (GPS) cannot be applied in the indoor environment, the indoor base station cannot use GPS to effectively obtain the user's current motion pattern. In cellular networks that primarily provide indoor coverage

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