Cell reselection method between networks of different systems

Abstract

The invention provides a cell reselection method between networks of different systems, comprising the following steps of measuring a first network cell signal intensity and a second network cell signal intensity by using user equipment residing on a first network cell; reselecting the user equipment to a second network cell after Srxlev (Srxlevel) of the first network cell is less than an absolute threshold of the first network cell Qrxlevmeas of the second network cell is more than an absolute threshold of the second network cell and a reselection delay time duration is sustained; and finitely selecting a cell with the best signal intensity for reselection while multiple cells in the second network satisfy the condition. According to the method, the absolute threshold is introduced, therefore, the UE can residue on a certain network, as long as when a resident network receiving signal is less than a certain tolerance value, the UE can be reselected to another network without influencing the residing on the current network due to the signal intensity of the another network, the standby time of a UE terminal is effectively prolonged, and business service continuity is increased.

Description

【Technical field】 [0001] The invention relates to wireless network communication technology, in particular to a cell reselection method for user equipment (UE) between networks of different standards. 【Background technique】 [0002] In idle mode, the UE needs to monitor the signal levels of the current cell and neighboring cells at any time to select the best cell to provide services. This is the cell reselection process. The cell reselection criteria in connected mode are the same as in idle mode, and the following criteria must be met: [0003] TD (Time Division-Synchronous Code Division Multiple Access, time division synchronous code division multiple access technology) network reselection criteria: [0004] (1) The UE stays in the current serving cell for more than Treselection; [0005] (2) The Srxlev of the current serving cell is less than a certain value (reselection threshold of same-frequency cell or inter-frequency cell or inter-system cell) to start measurement...

AI Technical Summary

Problems solved by technology

[0011] see figure 1 As shown, due to the different coverage of the GSM and TD networks, the terminal frequently reselects between the GSM and TD networks; according to the above description of the criteria, it is known that the TD network and the GSM network reselection criteria use relative thresholds. If the TD network reselects to the GSM network The relative threshold is less than 20dB, and the reselection threshold from the GSM network to the TD network is also less than 20dB. figure 1 When the two places move, frequent inter-system reselection will be performed, which greatly shortens the standby time of the UE terminal; it is also not conducive to the UE terminal stably staying in a certain network, and the continuity of business services is also affected; Stable, while the other network fluctuates greatly, it will also cause the UE to continuously reselect between the two networks

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