Paging Message Beam Sweeping for High Frequency Path Loss
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Solution Overview
Problem
In LTE networks, the receiving quality of paging messages is low due to high path loss at high frequency bands, which affects the effectiveness of paging processes.
Innovation Solution
The method involves an access network device determining a paging message and transmitting it to a terminal device through beam scanning, with specific timing and duration considerations based on the terminal's paging cycle, including periods of continuous listening and sleep states, to improve message reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If paging message is transmitted using traditional omnidirectional method in LTE network, then the signaling load is reduced and coverage area is large, but the receiving quality of paging message deteriorates due to high path loss at high frequency bands
Solution Approach 1:
The patent divides the omnidirectional transmission into multiple directional beam transmissions. Instead of transmitting paging messages in all directions simultaneously using a single omnidirectional antenna pattern, the system segments the coverage area and transmits paging messages through multiple directed beams from different antenna ports, each covering a specific spatial sector. This segmentation allows the energy to be concentrated in specific directions, overcoming the high path loss at high frequencies while maintaining comprehensive coverage.
Solution Approach 2:
The patent introduces spatial dimensionality to the paging transmission by utilizing multiple antenna ports with different beam directions. Rather than relying solely on temporal or frequency dimensions for signal distribution, the system adds a spatial dimension through beamforming, where each antenna port transmits in a specific three-dimensional spatial direction. This dimensional expansion enables the system to combat high frequency path loss by directing energy precisely toward terminal devices in different spatial locations.
2Reliability
If beam scanning is used to improve paging message receiving quality, then the receiving quality improves, but the transmission time and complexity increase
Solution Approach 1:
The patent implements periodic beam scanning where the access network device transmits paging messages through multiple antenna ports in a periodic sequence. Each antenna port transmits in a specific time slot according to a predetermined periodic pattern, allowing terminal devices to receive paging messages from different directions at different times. This periodic action distributes the transmission time across multiple ports while maintaining the benefits of directional beamforming, thus improving receiving quality without requiring excessively long transmission durations.
Solution Approach 2:
The patent employs preliminary action by having the access network device pre-configure multiple antenna ports with specific beam directions and transmission timing before actual paging transmission. The system prepares the beam scanning pattern in advance, so when paging messages need to be transmitted, the structured multi-port transmission can begin immediately without real-time computation delays. This preliminary configuration reduces the actual transmission time required while maintaining the quality improvements from beam scanning.
Data Source
AI summary
The invention provides methods of transmitting and receiving a paging message, access network equipment, and terminal device equipment. The method of transmitting a paging message comprises: access network equipment determines a paging message; the access network equipment determines a paging start time and a continuous paging transmission time interval; and the access network equipment transmits, by employing beam sweeping, and according to the paging start time and the continuous paging transmission time interval, the paging message. Therefore, the embodiment can enhance quality of receiving a paging message.