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Handoff determination in a heterogeneous network

A heterogeneous network and cell technology, applied in the field of communication systems, can solve problems such as frequent user equipment switching, reduced switching rate, service quality, and load control loss

Inactive Publication Date: 2013-09-25
BROADCOM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, problems arise from the exponential increase in the number of base stations in heterogeneous network cells, resulting in frequent user equipment handovers
Increased handover rate leads to reduced quality of service, loss of load control, and consequent disconnection of user equipment

Method used

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  • Handoff determination in a heterogeneous network
  • Handoff determination in a heterogeneous network
  • Handoff determination in a heterogeneous network

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0033] figure 1 A heterogeneous network 100 is shown. The heterogeneous network 100 includes a macro layer 102 , a small layer 104 and a femto layer 106 . It should be understood that the layers are shown in a stacked relationship; however, deployment is generally oriented along a plane defined by the local topography.

[0034] Each of layers 102, 104, and 106 has a different density of base stations for a given cell size. For example, the macro layer 102 includes a macrocell base station 114 with a tower 112 that can provide each base station unit with large wireless coverage and provides Evolution (HSPA+), Global System for Mobile Communications (GSM), etc.

[0035] The small layer 104 may have a medium density of cell base stations compared to macro cell base stations. As an example, it is not uncommon to have six small cell base stations 116 per macro sector (three sectors per macro cell). A small cell base station 116 may have an effective service range of up to 1 ki...

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Abstract

The invention discloses handoff determination in a heterogeneous network. Provided is coordinating user equipment handover in a heterogeneous network cell that includes a plurality of overlaying cell layers. An access controller of a network core receives a first parameter relating to signal quality for the user equipment with a serving cell of a cell layer of the plurality of overlaying cell layers, and receives a second parameter based upon a velocity estimation of user equipment within the heterogeneous network cell. When the first parameter indicates a cell boundary, the access controller forms a handoff decision to a cell base station of a cell layer of the plurality of overlaying cell layers based upon the second parameter, and initiates a handoff to the cell base station based upon the handoff decision.

Description

[0001] Cross References to Related Applications [0002] This patent application claims priority to US Patent Application No. 13 / 423,440, filed March 19, 2012, the entire contents of which are hereby incorporated by reference. technical field [0003] The present subject matter relates generally to communication systems, and more particularly to handover determination of radio cells or for user equipment in heterogeneous networks. Background technique [0004] Traditionally, cellular networks are based on macro base stations. These macro base stations transmit at higher power and are designed to maximize coverage of user equipments (UEs). [0005] Through the evolution of cellular technology (e.g., 2G to 2.5G, 2.5G to 3G, 3G to 4G, such as GSM, GPRS, UMTS, HSPA, LTE, etc.), low power and more localized base station concepts (e.g., pico (pico) cell, femto (femto) cell). [0006] Macro base stations are intended to broadly serve all user equipments; however, the use of broa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W36/08
CPCH04W36/04H04W36/14H04W36/32H04W16/32H04W36/30H04W36/38H04W84/045H04W36/0085
Inventor 拉斐尔·卡蒙约阿夫·沃洛奇
Owner BROADCOM CORP