Cell selection method and device based on network cooperation

Abstract

The invention belongs to the technical field of mobile communication, and particularly relates to a cell selection method and device based on network cooperation, and the method comprises the steps: calculating the average utility of user equipment according to the channel capacity obtained by each user in an overlapping region of a macro cell and a small cell from a service provider and the pricepaid to a base station by the user; selecting the small cell where the user equipment is located when the average utility of the user equipment is maximum as a candidate cell, and after the candidatecell is confirmed, the user equipment sending a measurement request to the original service cell; the original service cell sending the measurement report to the user equipment, the user equipment checking the load of the candidate cell, and if the residence condition is met, the user equipment requesting to switch from the original service cell to the candidate cell. Compared with a traditionalmethod, more than 75% of user equipment has better throughput, the overall system performance is improved by 5%, and the method can be better and widely applied to LTE / 5G heterogeneous deployment scenes.

Description

technical field [0001] The invention belongs to the technical field of mobile communication, and in particular relates to a cell selection method and equipment based on network cooperation. Background technique [0002] Currently, there are two typical dual-connection deployment scenarios of LTE and 5G NR, that is, a homogeneous deployment network scenario and a heterogeneous deployment network scenario. For heterogeneous deployment scenarios, 5G gNB is added to the existing LTE network as a pico node, femto node, relay node, etc. These nodes introduce additional frequency-domain and time-domain resources, thereby improving the spectral efficiency of the cell. This heterogeneous deployment can improve cell edge coverage and user throughput, and extend coverage by serving users in coverage holes such as internal buildings. This heterogeneous deployment introduces new scenarios in terms of cell selection, interference cancellation, and load management. To get the most out o...

AI Technical Summary

Problems solved by technology

But in LTE / 5G heterogeneous deployment scenarios, this method is not suitable due to the large power difference between macro cells and small cells

Another improved cell area expansion algorithm (Cell Range Expansion, CER) is to increase the coverage of the small cell by adding an offset to the reference signal received power RSRP from the small cell, which makes the extended area (Range Expansion, RE) The user equipment in the small cell camps on the small cell regardless of the load of the small cell, which will reduce the system performance

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