Switching method under heterogeneous cellular network

Abstract

The invention discloses a switching method under a heterogeneous cellular network, which comprises the steps of: calculating a switching active threshold HAT by user equipment (UE) according to an effective switching threshold EHT and an active index AH which are transmitted by a macro base station, and determining a coverage area of the switching active area HAA of the macro base station according to the acquired HAT value; determining movement direction by the current UE according to reference signal receiving power RSRP values of the macro base station and a micro base station; if movement from the macro base station to the micro base station is determined, determining whether the UE enters the HAA area of the macro base station according to the reference signal receiving power RSRP value and HAT value of the macro base station, thereby determining whether switching from the macro base station to the micro base station is required; and if movement from the micro base station to the macro base station is determined, determining whether the UE enters the non-HAA area of the macro base station according to the reference signal receiving power RSRP value of the macro base station, thereby determining whether switching from the micro base station to the macro base station is required. The switching method under the heterogeneous cellular network according to the invention has the functions of: improving resource utilization rate, and reducing system performance reduction and ping-pong effect caused by switching time delay.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a handover method under a heterogeneous cellular network. Background technique [0002] With the application of data services more and more widely and users' demand for data rate increases, the traditional cellular network architecture can no longer meet the needs of service characteristics. Based on this, LTE-A has carried out research on heterogeneous cellular networks, aiming to improve the regional throughput and improve indoor coverage. The so-called heterogeneous cellular network means that different network nodes have different transmission powers and different types of backhaul links. Typical heterogeneous cellular network nodes include: a macro base station (macro cell) and a micro base station (small cell). The micro base station includes: a femto base station (pico cell), a home base station (femtocell) and a relay base station (relay). Among them, the macro ...

AI Technical Summary

Problems solved by technology

However, the implementation process of this method is slightly complicated, which will increase the signaling overhead and cause waste of resources; moreover, this method is based on the handover preparation stage, and optimizes the handover time without considering the ping-pong caused by frequent handover during the handover process. effect of influence

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