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Cell Search and Measurement in Heterogeneous Networks

A cell search, weak cell technology, applied in the field of heterogeneous networks, can solve problems such as difficulty in measuring output power signals

Active Publication Date: 2016-08-03
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in some heterogeneous deployment scenarios, there is no need for mobile terminals to find and report micro cells
In addition, the large difference in output power of a macro cell compared to a micro cell can make it difficult to measure the signal transmitted by a micro cell

Method used

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  • Cell Search and Measurement in Heterogeneous Networks
  • Cell Search and Measurement in Heterogeneous Networks
  • Cell Search and Measurement in Heterogeneous Networks

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Embodiment Construction

[0016] Now turning to the attached drawings, figure 1 An exemplary heterogeneous communication network 10 according to an exemplary embodiment of the present invention is shown. The present invention is described in the context of the Long Term Evolution (LTE) network specified in Release 10 of the LTE standard. However, those skilled in the art understand that the present invention can be applied to heterogeneous networks using other communication standards.

[0017] The communication network 10 includes a plurality of macro base stations or other high-power access nodes 200 that provide radio coverage in each macro cell 20 of the communication network 10. in figure 1 In the exemplary embodiment shown in, three micro cells 30 served by low power access nodes 300 are deployed in the macro cell 20. Low-power access nodes may include micro base stations or home base stations. It is assumed that the output power of the high-power access node is about 46dBm, and the output power of...

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Abstract

An extended cell search procedure that enables more inclusive measurement reporting for mobile terminals operating in heterogeneous networks. A mobile terminal may be configured to perform an extended cell search to be able to better detect signals transmitted from weak cells. For a mobile terminal capable of extended cell search, when there is a need for extended cell search, the network sends an extended cell search message to the mobile terminal. In response to the extended cell search message, the mobile terminal uses the extended cell search procedure instead of the normal cell search procedure (as specified in Rel-8 of the LTE standard) when performing a cell search.

Description

Technical field [0001] The present invention generally relates to heterogeneous networks including a mixture of low-power and high-power nodes with overlapping coverage, and more specifically to cell search and measurement in heterogeneous networks. Background technique [0002] The new 3rd Generation Partnership Project (3GPP) standard known as Long Term Evolution (LTE) (3GPPLTERel-10) supports heterogeneous networks. In heterogeneous networks, a mixture of cells with different sizes and overlapping coverage areas is deployed. For example, a heterogeneous network may deploy a micro cell served by a relatively low power node in the coverage area of ​​a macro cell served by a relatively high power base station. Heterogeneous networks can also deploy relatively low-power home base stations and relays to provide enhanced services in indoor areas. The purpose of deploying low-power nodes (such as micro base stations, home base stations, and relays) in macro cells covered by high-po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W48/16
CPCH04W24/10H04W8/005H04W88/08H04W48/16
Inventor 本哥特·林多夫拉尔斯·林德布姆斯蒂芬·帕克维尔
Owner TELEFON AB LM ERICSSON (PUBL)