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Wireless communication system, frequency channel sharing method, and network controller device

A wireless communication system, network controller technology, applied in wireless communication, network planning, network traffic/resource management, etc., to achieve good efficiency

Active Publication Date: 2015-03-18
KOKUSA ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in the late-night time zone, there are times when channels are assigned but are not actually used due to broadcasting suspension, etc.

Method used

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  • Wireless communication system, frequency channel sharing method, and network controller device
  • Wireless communication system, frequency channel sharing method, and network controller device
  • Wireless communication system, frequency channel sharing method, and network controller device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0069] 1. System

[0070] exist Figure 7 An example of a WRAN network configuration diagram using the white space of the first embodiment is shown in . In addition, in this embodiment, the above-mentioned IEEE802.22 system is assumed to be described, but as long as the wireless communication system using white space, the downlink subframe and the uplink subframe have frames arranged alternately on the time axis, the time division duplex method The wireless communication system can be applied.

[0071] This WRAN system includes a plurality of base stations BS (BS1 (701), BS2 (702)), one or more terminals CPE (703-708) accommodated in these base stations, a white space database (WSDB) (713), and a network controller (NC) (714) and IP network (715). WSDB ( 713 ) and NC ( 714 ) may be one each, or a plurality of objects may be placed in units of areas. In this system, the communication between the BS and the CPE is performed by obtaining channel information that can be used b...

no. 2 Embodiment approach

[0124] A second example of this example will be described.

[0125] In the first embodiment, the first sharing method using the common division position to share the channel is adopted without interference from the CPE, but in the second embodiment, it is characterized in that the first sharing method and the The estimated value of the channel utilization efficiency of the second channel sharing method in which the frames of the shared channel are differentiated by time division is used to share the channel using a channel sharing method with high channel utilization efficiency. Hereinafter, the second embodiment will be described in detail.

[0126] 1. System

[0127] It is the same as the first embodiment, so the description is omitted.

[0128] 1.2. Action

[0129] 2-1. Normal mode

[0130] It is the same as the first embodiment, so the description is omitted.

[0131] 2-2. Channel sharing mode (with CPE interference): ODFC

[0132] It is the same as the first embodim...

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Abstract

When a frequency channel is shared between adjacent cells in a wireless communication system of time-division duplex operation utilizing a white space, more efficient communications can be achieved. In a wireless communication system of time-division duplex operation utilizing a white space, which is a temporally and spatially unused frequency, to perform wireless communications and having frames in which downstream and upstream subframes are alternately arranged on the time axis, a network controller calculates a common split position, which is to be used in synchronization between base stations sharing a frequency, from collected information in response to a frequency sharing trigger and synchronizes the determined split position between the base stations, thereby allowing the frequency channel to be shared.

Description

technical field [0001] The present invention relates to a wireless communication system, a method for sharing a frequency channel, and a network controller device, and relates to communication in a wireless communication system utilizing a white space so that even if a plurality of base stations share a single frequency channel, there is no mutual interference. Control Technology. Background technique [0002] Currently, the use of radio waves is widely developed in various fields, and in particular, a wireless broadband system that can be used regardless of location and time is expected to have a large demand in the future. In order to meet these demands, it is necessary to secure new frequencies, but the frequency band below 6 GHz, which is convenient for use in wireless broadband, has already been carefully utilized. Therefore, in the future, it is necessary to flexibly use frequency bands (so-called white spaces) that can be used temporally, spatially, and technically e...

Claims

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Application Information

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IPC IPC(8): H04W16/14H04W28/06H04W28/16H04W72/04
CPCH04W16/14H04W72/0453
Inventor 石川崇村井真治玉木刚
Owner KOKUSA ELECTRIC CO LTD
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