Switching method under heterogeneous cellular network

A heterogeneous cellular network, handover threshold technology, applied in the field of communication, can solve the problems of complex process, increased signaling overhead, and unconsidered, and achieve the effects of reducing the ping-pong effect, improving resource utilization, and improving handover performance

Active Publication Date: 2014-05-07
BEIJING UNIV OF POSTS & TELECOMM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Switching method under heterogeneous cellular network
  • Switching method under heterogeneous cellular network
  • Switching method under heterogeneous cellular network

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Embodiment 1

[0021] figure 1 It is a flowchart of a handover method under a heterogeneous cellular network provided by Embodiment 1 of the present invention. Such as figure 1 As shown, the method mainly includes:

[0022] The user equipment (UE) calculates the handover active threshold (HAT) according to the effective handover threshold (EHT) and activity index (AH) sent by the macro base station, and determines the coverage of the handover active area (HAA) of the macro base station according to the obtained HAT value;

[0023] The current UE determines its current moving direction according to the real-time detection of the reference signal received power (RSRP) value of the macro base station and the micro base station;

[0024] If moving from a macro base station to a micro base station, determine whether to enter the HAA area of ​​the macro base station according to the reference signal received power RSRP value and the HAT value of the macro base station; thereby determine whether ...

Embodiment 2

[0042] In order to facilitate the understanding of the present invention, the embodiments of the present invention are combined with the attached Figure 2-3 The handover method under the heterogeneous cellular network described in the first embodiment is divided into two parts, the handover from the macro base station to the micro base station, and the handover from the micro base station to the macro base station.

[0043] 1. Handover from a macro base station to a micro base station.

[0044]When a user moves from a macro base station to a micro base station, this embodiment improves the handover performance through the active area and predictive estimation, reduces the impact of handover delay on the system, and can effectively prevent frequent and unnecessary handovers to avoid wireless Waste of resources, improve resource utilization.

[0045] figure 2 A flow chart of handover from a macro base station to a micro base station provided by an embodiment of the present i...

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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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W36/04H04W36/30
Inventor 张天魁张晓澜冯春燕曾志民
Owner BEIJING UNIV OF POSTS & TELECOMM
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