Method and equipment for suppressing interference under condition of sharing of frequency spectrum by different systems

A technology of spectrum sharing and interference suppression, which is applied in the field of communication, can solve problems such as the inability to reduce mutual interference between the cognitive system and the authorized system, and achieve the effect of improving utilization efficiency and link quality

Active Publication Date: 2012-12-19
DATANG MOBILE COMM EQUIP CO LTD
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  • Abstract
  • Description
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Problems solved by technology

[0012] Embodiments of the present invention provide an interference suppression method and device in the case of spectrum sharing between different systems, and solve the problem that the existing power control and user scheduling strategies cannot reduce the mutual interference between the cognitive system and the authorized system

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  • Method and equipment for suppressing interference under condition of sharing of frequency spectrum by different systems
  • Method and equipment for suppressing interference under condition of sharing of frequency spectrum by different systems
  • Method and equipment for suppressing interference under condition of sharing of frequency spectrum by different systems

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Embodiment Construction

[0028] As mentioned in the background, with the rapid development of mobile communication services, telecom operators will face the problem of scarce spectrum resources. However, the spectrum usage of different RATs in the wireless communication frequency band changes with time and region, which leads to greater demand for spectrum of some RATs in certain areas at certain times, while some RATs in the same area are relatively idle at this time.

[0029] The fixed spectrum allocation policy is unlikely to change in the short term, and the spectrum sharing between RATs can be realized through cognitive radio technology to improve spectrum utilization.

[0030] The first principle of cognitive radio is the protection of licensed systems, that is, cognitive radio should use idle spectrum resources without interfering with licensed systems on idle spectrum, and licensed systems include licensed systems in idle spectrum areas and adjacent areas of idle spectrum. Licensed system, the...

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Abstract

The embodiment of the invention discloses a method and equipment for suppressing interference under the condition of the sharing of frequency spectrum by different systems. According to the technical scheme of the invention, the downlink maximum transmission power and/or the uplink maximum transmission power of a cognitive cell on a cognitive frequency band is limited, so taht the interference between a cognitive system and an authoritative system is reduced effectively under the condition of the sharing of the frequency spectrum by the cognitive system and the authoritative system, the interference of the authoritative system to the downlink of the cognitive system is reduced, the interference of the cognitive system to the uplink and the downlink of the authoritative system is reduced, the cognitive system can use the idle frequency spectrum resource of the authoritative system under the condition of noninterference/low interference, the utilization efficiency of the frequency spectrum is improved, and the quality of the links is improved.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to an interference suppression method and equipment in the case of spectrum sharing among different systems. Background technique [0002] With the rapid development of the mobile communication industry, the contradiction between the growing demand for broadband wireless communication and the limited spectrum resources is becoming more and more obvious. Although OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing, Multiplexing technology), MIMO (Multiple-Input Multiple-Out-put, Multiple Input Multiple Output) and other technologies to improve spectrum utilization, but these cannot fundamentally solve the problem of limited spectrum resources. [0003] The spectrum usage of different wireless access systems in the IMT (International Mobile Telecommunication) frequency band changes with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/14
CPCH04W52/146H04W52/367H04W52/244H04W52/143H04W16/14
Inventor 蒋成钢李媛媛白文岭杨宇
Owner DATANG MOBILE COMM EQUIP CO LTD
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