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A Positioning Method Based on Special Subframe in TDD Cellular Mobile Communication System

A cellular mobile communication and special subframe technology, applied in wireless communication, electrical components, etc., can solve problems such as inability to locate, decrease in positioning performance, and satellite navigation signal occlusion, and achieve good forward compatibility

Active Publication Date: 2016-05-04
ACAD OF OPTO ELECTRONICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, since the satellite signal is already very weak when it reaches the ground, it is easily blocked by buildings, trees, and vehicles, resulting in a sharp decline in positioning performance in typical environments such as urban canyons (between high-rise buildings), or even failure to locate
In addition, in indoor, underground (such as tunnels, underground garages) and other environments, satellite navigation signals will be completely blocked, making it impossible to complete positioning

Method used

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  • A Positioning Method Based on Special Subframe in TDD Cellular Mobile Communication System
  • A Positioning Method Based on Special Subframe in TDD Cellular Mobile Communication System
  • A Positioning Method Based on Special Subframe in TDD Cellular Mobile Communication System

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Embodiment Construction

[0022] Considering the wide coverage of the cellular mobile communication system and the large number of user groups, combined with the technical characteristics of the TDD cellular mobile communication system, the present invention proposes a positioning method based on special subframes in the TDD cellular mobile communication system, which can be used in the existing cellular mobile communication Realize indoor and outdoor positioning on the basis of network. The present invention can be directly applied in existing LTE and LTE-A systems, and can also be applied in future new mobile communication systems.

[0023] For the convenience of description, this article takes the TDD-LTE system as an example to describe the content of the invention. It should be noted that the present invention is also applicable to other TDD systems.

[0024] In the TDD-LTE system, the uplink (user to base station) and downlink (base station to user) use the same frequency, and the uplink and down...

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Abstract

The invention discloses a positioning method based on special sub-frames in a TDD cellular mobile communication system. Frequency spread sequences with positioning information are added into a frame structure of an existing signal, in this way, indoor and outdoor positioning is achieved, resources and good covering of an existing cellular mobile communication network are utilized well, and indoor and outdoor navigation positioning is achieved just through simply upgrading the TDD cellular mobile communication system. According to the positioning method, it is unnecessary to erect radio emission equipment specially for meeting the navigation positioning requirement, it is unnecessary to apply for frequency resources alone, and extra maintaining is not needed. Compared with an existing system, interference with existing users will not occur, and therefore the positioning method has good forward compatibility; because the cellular mobile communication system has good covering in indoor and outdoor environments, navigation positioning can be achieved in the various indoor and outdoor complex environments through the designed signal generating and positioning method.

Description

technical field [0001] The invention relates to the field of mobile communication and navigation, in particular to a positioning method based on a special subframe in a TDD cellular mobile communication system. Background technique [0002] In recent years, people's demand for navigation and positioning is increasing day by day, especially in the higher and higher requirements for navigation and positioning accuracy (from tens of meters to meter level), and the wider and wider requirements for navigation and positioning areas (from outdoor to indoor) . [0003] At present, the most commonly used navigation method is satellite navigation mainly represented by GPS, including Russia's GLONASS system, EU's Galileo, and my country's Beidou satellite navigation system. However, since the satellite signal is already very weak when it reaches the ground, it is easily blocked by buildings, trees, and vehicles, resulting in a sharp decline in positioning performance in typical enviro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W64/00
CPCH04W64/00
Inventor 魏东岩徐颖郝巍娜袁洪公续平李子申何智力曾茂书
Owner ACAD OF OPTO ELECTRONICS CHINESE ACAD OF SCI
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