Heterogeneous cellular network and micro base stations therein, and resource selection method of micro base stations

Abstract

The invention provides a heterogeneous cellular network which is based on a fractional frequency reuse mechanism and micro base stations therein, and a resource selection method of the micro base stations so that inter-cell same-frequency interferences can be reduced and thus network capacity is improved. The micro base stations in the heterogeneous cellular network are provided with resources which can be used by users. The resources include frequency bands and time slots. The heterogeneous cellular network is provided with a plurality of base stations which include macro base stations and the micro base stations. Each micro base station is characterized by including an information obtaining unit which obtains configuration information and load information of the micro base station and obtains configuration information and load information of adjacent base stations from the base stations which are adjacent to the micro base station, and a resource selection unit which selects part of resources from the resources according to the configuration information and load information of the micro base station and the adjacent base stations, obtained through the information obtaining unit, so as to be used by the users.

Description

technical field [0001] The invention relates to a heterogeneous cellular network based on a partial frequency reuse mechanism and a micro base station and a resource selection method of the micro base station. Background technique [0002] Currently, a traditional cellular network including only one type of base station (hereinafter referred to as a homogeneous cellular network) is widely used. A cellular network including multiple types of base stations (hereafter also referred to as a heterogeneous cellular network) has also been researched and developed, and gradually popularized and applied. [0003] Figure 9 is a schematic diagram showing the configuration of a heterogeneous cellular network. exist Figure 9 In the shown heterogeneous cellular network, there are 4 macro base stations (macro BS) MBS and 8 micro base stations mBS. Here, a micro base station is a general term for a micro base station different from a macro base station, and includes, for example, a home...

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Problems solved by technology

Therefore, there are the following problems: Not only are resources wasted by providing excessive services, but also because the micro base station and the adjacent base station use the same frequency band, the interference between cells is aggravated, and the network capacity is reduced.

[0007] As mentioned above, although homogeneous cellular networks mostly use the full-frequency multiplexing mechanism in 3G and later standards, heterogeneous cellular networks are different from homogeneous cellular networks. Heterogeneous cellular networks contain different types of coverage capabilities. Different types of base stations, differences between base stations and cells make full-frequency multiplexing no longer the optimal multiplexing mechanism for heterogeneous cellular networks

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