An access network device, user equipment, communication system, and communication method

Abstract

The embodiment of the present invention discloses an access network device, including: a processing module, configured to generate demand indication information, and the demand indication information is used to indicate that the user equipment UE needs to meet the radio resource management (RRM) requirement applicable to a high-speed mobile communication environment ; and a sending module, configured to send the demand indication information to UEs covered by the cell. The present invention also discloses a user equipment, a communication system and a communication method, which solves the technical problem in the prior art that the UE passes through the target cell due to the rapid movement speed of the UE, but fails to complete the RRM. The UE can adjust the RRM strategy according to the preset RRM parameters suitable for the high-speed mobile communication environment to shorten the reselection time of the intra-frequency cell, or shorten the target cell identification time, or shorten the synchronization / out-of-synchronization evaluation time, or shorten the measurement period, to Meet the RRM requirements in the high-speed mobile communication environment to ensure and improve network performance.

Description

technical field [0001] The present invention relates to the communication field, in particular to an access network device, user equipment, a communication system and a communication method. Background technique [0002] With the changes of the times and the advancement of science and technology, there are more and more means of transportation around people, and the speed is getting faster and faster. Based on the measured data of communication operators and the theoretical analysis of high-speed mobile communication, there are many problems in high-speed mobile communication compared with traditional cellular network communication. [0003] In the prior art, the user equipment (User Equipment, UE) still uses the radio resource management (Radio Resource Management, RRM) algorithm parameters in the ordinary cellular network to perform measurement, cell selection or reselection in a high-speed mobile state (for example, on a high-speed rail) During radio resource management ...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the user equipment (User Equipment, UE) still uses the radio resource management (Radio Resource Management, RRM) algorithm parameters in the ordinary cellular network to perform measurement, cell selection or reselection in a high-speed mobile state (for example, on a high-speed rail) During radio resource management such as , handover, and radio link monitoring, due to the rapid movement of the UE, it is easy to appear such as figure 1 In the case shown, the UE passed through the target cell, but failed to complete the RRM problem well

[0004] For example, the UE is on a high speed train (High Speed ​​Train, HST) with a speed of 350 km / h, and the distance between cells is 500 meters. ) periodic cell reselection, the UE is only required to complete the identification and evaluation of the same-frequency cell within 36 DRX cycles (that is, 11.52 seconds) to meet the reselection condition; however, according to the requirement of 11.52 seconds, the UE The maximum distance passed can be 1120 meters, therefore, it is easy to happen that the UE has passed through the target cell but still fails to camp on the target cell, resulting in a serious drop in system performance

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