Geographic location database-based uplink enhancement method

A geographic location and database technology, which is applied in the field of uplink enhancement based on geographic location database and uplink enhancement, can solve the problems of secondary user communication service quality degradation, uplink throughput degradation, etc., and achieve an increase in carrier frequency Utilization rate, effect of guaranteeing communication service quality

Inactive Publication Date: 2014-04-02
SHANGHAI RES CENT FOR WIRELESS COMM +1
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Problems solved by technology

[0006] At the current stage, there are two deficiencies in cognitive TD-LTE wireless networks: on the one hand, when the primary system requests to use its authorized carrier frequency, users in the secondary system that do not support carrier frequency aggregation must deactivate the carrier frequency and force switching to its own authorized frequency
When the macro base station deactivates the carrier frequency, the throughput of the uplink decreases, resulting in a decrease in the service quality of the secondary user communication

Method used

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  • Geographic location database-based uplink enhancement method
  • Geographic location database-based uplink enhancement method
  • Geographic location database-based uplink enhancement method

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Embodiment Construction

[0045] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0046] The invention is applicable to the network where the main system and the secondary system coexist. Wherein, the cognitive LTE network is used as a secondary system to connect with the primary system through a geographic location database. Such as figure 1As shown, the current LTE system includes two base stations: a macro base station and a pico base station. There are two available carrier frequencies f0 and f1 in this system. The carrier frequency f0 is an authorized carrier frequency, and the carrier frequency f1 is a cognitive carrier frequency provided by a geographic location database according to the geographic location information of the macro base station or an available carrier frequency not used by other main systems temporarily. In order to improve system throughput and ensure service quality, the macro base stat...

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Abstract

The invention discloses a geographic location database-based uplink enhancement method. The method comprises the following steps: a master system transmits a request of recovering the available carrier frequency and protective region information to a geographic location database; the geographic location database transmits a release command of the available carrier frequency and the protective region information to an affected base station; the base station estimates the disturbed condition of the master system caused by the served users, and divides the users into different regions according to the disturbed condition; the base station distributes scheduling information of uplink and downlink carrier frequencies to the users in different regions, and informs the geographic location database of updating the usage information of the available carrier frequency. By the adoption of the geographic location database-based uplink enhancement method, the available frequency spectrum utilization rate of secondary systems can be effectively improved, and the throughput capacity of the uplink is increased, so that the network performance and the communication service quality of an LTE (long term evolution) system are guaranteed.

Description

technical field [0001] The invention relates to an uplink enhancement method, in particular to an uplink enhancement method based on a geographic location database, and belongs to the technical field of wireless communication. Background technique [0002] Cognitive radio is also called smart radio. Its core idea is to realize dynamic carrier frequency allocation and carrier frequency sharing through carrier frequency sensing and intelligent learning capabilities of the system. It is flexible, intelligent, and reconfigurable. Cognitive radio perceives the external environment and uses artificial intelligence technology to learn from the environment, and purposely changes certain operating parameters (such as transmission power, carrier frequency and modulation technology, etc.) in real time to adapt its internal state to the received wireless information. Statistical changes of signals, so as to realize highly reliable communication at any time and any place and efficiently ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/08H04W72/12H04W24/10
Inventor 袁芝胡宏林
Owner SHANGHAI RES CENT FOR WIRELESS COMM
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