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Frequency spectrum polymerization method assisted by time division long term evolution (TD-LTE) Femtocell network database

A spectrum aggregation and database technology, which is applied in the field of wireless communication, can solve the problem of low spectrum utilization and achieve good spectrum utilization, large access bandwidth gain, and good system access performance

Inactive Publication Date: 2013-04-10
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0004] In order to solve the problem of low spectrum utilization of the traditional spectrum aggregation method, the example of the present invention provides a TD-LTE Femtocell database-assisted spectrum aggregation method using TVWS, and a center compatible with the database structure suggested by the FCC used in the method The control entity and a graph coloring model modeling method considering spectrum aggregation achieve the purpose of making full use of the uneven co-channel interference relationship of femtocell FBSs in Femtocell networks, thereby improving spectrum utilization

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  • Frequency spectrum polymerization method assisted by time division long term evolution (TD-LTE) Femtocell network database
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  • Frequency spectrum polymerization method assisted by time division long term evolution (TD-LTE) Femtocell network database

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Embodiment Construction

[0021] In order to make the objectives, technical solutions and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0022] The structure of the cognitive TD-LTE Femtocell system according to the embodiment of the present invention is as follows: figure 1 shown. The system consists of three parts: a central control entity, multiple FBSs with spectrum sensing function and multiple Femtocell user end devices. The FBSs are connected to the central control entity through an IP backhaul link.

[0023] The spectrum pattern of TVWS used in this embodiment of the present invention is as follows: figure 2 shown. The white available spectrum fragments are separated by the black spectrum fragments occupied by primary users, and are discrete in the frequency domain. If multiple discrete available spectrum fragments are used together, spectrum aggregation technology...

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Abstract

The invention discloses a frequency spectrum polymerization method assisted by time division long term evolution (TD-LTE) Femtocell database using TV White Space (TVWS). In order to achieve the frequency spectrum polymerization method, the invention further provides a centralized control entity compatible with a database structure suggested by the federal communications commission (FCC) and a modeling approach considering graph coloring model in the process of frequency spectrum polymerization. The frequency spectrum polymerization method takes full advantage of uneven cochannel interference relationship between family base stations (FBSs). Database-assisted Spectrum Aggregation Algorithm (DSAA) is applied to the graph coloring model in the process of considering frequency spectrum polymerization, and therefore the Femtocell is enabled to obtain good system access performance on aspects of general system access bandwidth and the number of the FBSs system access.

Description

technical field [0001] The invention belongs to the field of wireless communication, and particularly relates to a spectrum aggregation technology of a cognitive time division duplex long term evolution system home base station system (TD-LTE Femtocell). Background technique [0002] With the development of wireless communication technology, people's demand for wireless spectrum resources is increasing. However, wireless spectrum is a scarce, limited resource. As the traditional analog TV broadcasting system gradually transitions to a digital system, a large amount of spectrum resources are idle, which is called TVWS (TV White Space). FCC (Federal Communications Commission) rules issued in 2010 recommend that other broadband wireless devices use these resources as secondary systems. Femtocell, as a technology for LTE network to provide cellular network coverage for indoor and office hotspot areas, was initially designed to share spectrum resources with the macro cellular n...

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Application Information

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IPC IPC(8): H04W16/14
Inventor 冯春燕李晓明郭彩丽厉东明郭玉婷曾志民
Owner BEIJING UNIV OF POSTS & TELECOMM
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