Optimum subdistrict updating method and its system, subscriber terminal and network

Abstract

The present invention relates to the mobile communication field and discloses an updating method of an optimum small zone, and a system user terminal and a network, to enable to update the optimum small zone in a more flexible way. In the present invention, a UE performs the detection to at least one small zone, selects a candidate optimum small zone, and periodically reports the measurement report of the small zone to a network side when the candidate optimum small zone meets the report rules. After the optimum small zone being updated, the network side indicates the UE to update the optimum small zone at a UE side into the optimum small zone determined at the network side.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to the update technology of the optimal cell. Background technique [0002] Code Division Multiple Access (CDMA for short) technology is a mobile communication technology designed for the requirements of large capacity, high quality, integrated services, soft handover, and international roaming required by modern mobile communication networks. [0003] CDMA technology is based on spread spectrum technology. By modulating the information data with a certain signal bandwidth that needs to be transmitted with a high-speed pseudo-random code whose bandwidth is much larger than the signal bandwidth, the bandwidth of the original data signal is expanded, and then modulated by the carrier and sent out. . The receiving end uses the same pseudo-random code to perform correlation processing with the received broadband signal, and converts the broadband signal into a narrowband signal of t...

AI Technical Summary

Problems solved by technology

[0025] In practical applications, the above solution has the following problems: the optimal cell is updated through the existing 1D event reporting method, which restricts the network side to independently and flexibly determine and update the optimal cell, and easily leads to the optimal cell on the network side and the UE side. The inconsistency of the cell causes the network side to fail to correctly update the optimal cell

[0026] The main reason for this situation is that in the prior art, only relying on the UE to detect the cell, and when the preset evaluation criteria are met (that is, when a new optimal cell is found), a 1D event is triggered to notify the network The optimal cell is updated on the network side. The selection of the optimal cell is only determined by the UE according to the preset evaluation criteria. The network side cannot independently and flexibly determine the optimal cell based on the UE’s measurement report.

[0027] Moreover, in the prior art, the UE immediately updates the optimal cell on the UE side after the 1D event is reported, while the network side needs to wait to receive the report from the UE side, and update the optimal cell according to the measurement report. Since the report triggered by the 1D event is Reported in Acknowledged Mode ("AM" for short), retransmission may occur, causing the network side to delay updating the optimal cell, resulting in inconsistency between the network side and the UE side optimal cell; and even if the network side receives the measurement It may also refuse to accept the cell reported by the UE as the optimal cell due to insufficient cell resources. This kind of situation will also lead to the inconsistency between the optimal cell on the network side and the UE side

The inconsistency of the optimal cell may affect the subsequent reporting of the optimal cell, and ultimately affect the selection of the optimal cell

For example, cell A is currently the optimal cell for the UE. The UE finds that the signal of cell B is better than that of cell A through detection, reports a 1D event, and updates cell B as the optimal cell for the UE. However, the network side may be due to insufficient resources in cell B. , Cell B is not accepted as the optimal cell on the network side, and the optimal cell on the network side is still Cell A. When the optimal cells on both sides are inconsistent, the UE finds that the signal of Cell C is worse than that of Cell A and Cell B. At this time, because the optimal cell on the UE side is cell B, and the signal of cell C is worse than that of cell B, the UE will not report the 1D event for cell C, and the network side may lose the opportunity to update the optimal cell

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