Pseudolite Node Parameter Broadcast Channel for Wireless Access Point Capacity
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Solution Overview
Problem
Existing pseudolite positioning systems occupy significant downlink capacity in cellular base stations due to the periodic transmission of pseudolite geographical coordinates and pseudo-random codes, which can lead to inefficiencies in wireless access point capacity utilization.
Innovation Solution
Implementing a method where pseudolites broadcast their node parameters, including geographical coordinates and pseudo-random sequences, on a configured positioning system message broadcast channel, allowing wireless access points to send only a positioning system message broadcast channel indication, thereby reducing the need to transmit these parameters and minimizing capacity occupation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cellular base station periodically sends pseudolite geographical coordinates and pseudo-random codes to positioning receivers, then positioning information can be obtained, but downlink capacity is significantly occupied
Solution Approach 1:
The patent extracts the positioning system message broadcast function from the cellular base station and assigns it to the pseudolite itself. The pseudolite directly broadcasts its geographical coordinates, pseudo-random code information, and positioning signal transmitting mode information on a dedicated positioning system message broadcast channel, eliminating the need for base station intervention and significantly reducing downlink capacity occupation while ensuring positioning information availability.
2Productivity
If pseudolite broadcasts node parameters and positioning signal transmitting mode information, then wireless access point capacity occupation is reduced, but message broadcast complexity increases
Solution Approach 1:
The patent segments the positioning system messages into distinct components: node parameter information (geographical coordinates, pseudo-random code information) and positioning signal transmitting mode information. These segmented messages are broadcast on dedicated positioning system message broadcast channels, allowing receivers to process specific message types independently and reducing overall system complexity despite the increased information volume.
Solution Approach 2:
The patent introduces a positioning system message broadcast channel as an intermediary between the pseudolite and positioning receivers. This dedicated channel serves as a standardized interface that simplifies the broadcasting process, providing a clear protocol for message transmission and reception, thereby reducing the complexity of direct peer-to-peer communication while preserving wireless access point capacity.
Data Source
AI summary
Disclosed is a method for transmitting pseudolite system messages, the method including: pseudolite sends pseudolite node parameters of the pseudolite to which a positioning system messages broadcast channel belongs, and pseudolite node parameters of the pseudolite adjacent or nearby to the pseudolite to which the positioning system messages broadcast channel belongs, in the configured positioning system messages broadcast channel. A method for transmitting indication message of the positioning system messages broadcast channel is also disclosed in the present invention, the method including: a wireless access point sends an indication message of the positioning system messages broadcast channel of the pseudolite to a radio positioning terminal in its service area. According to the indication message of the positioning system messages broadcast channel, the radio positioning terminal accesses corresponding the positioning system messages broadcast channel, and surveys the positioning signal and/or positioning based on the node parameters obtained from the positioning system messages broadcast channel. A pseudolite positioning system and associated device are also disclosed in the present invention. By the present invention, it is possible to reduce the occupancy for the wireless access point in the pseudolite positioning.