Wireless Scheduling Channel Segmentation for Beamforming Link Stability
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Solution Overview
Problem
In wireless communication systems using beamforming, efficiently transmitting and receiving scheduling information across multiple base stations to a terminal is challenging due to signal attenuation in high-frequency bands and limitations in forming a large number of narrow beams, leading to link fragility and increased power consumption.
Innovation Solution
Implementing a method where each reception beam of the terminal has a dedicated sub-scheduling channel, allowing for simultaneous transmission of scheduling information from multiple base stations using different times, frequency resources, and transmission/reception beams, with the main scheduling channel used by the serving base station and sub-scheduling channels for other base stations, optimizing beam alignment and reducing collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If beamforming is used to concentrate transmission power in a specific direction, then transmission efficiency is improved, but the system becomes sensitive to beam misalignment and link fragility increases
Solution Approach 1:
The patent segments the scheduling information transmission into multiple independent channels: a main scheduling channel for robust control information and multiple sub-scheduling channels for additional scheduling data. This segmentation allows the system to maintain reliable communication through the main channel while utilizing sub-channels for enhanced capacity, reducing the impact of beam misalignment on overall system reliability.
Solution Approach 2:
The patent changes the parameter of channel allocation by assigning different time-frequency resources to main and sub-scheduling channels. The main scheduling channel uses dedicated resources with higher reliability, while sub-scheduling channels use additional resources that can be dynamically allocated. This parameter change allows the system to optimize both transmission efficiency and reliability independently.
2Productivity
If multiple base stations transmit scheduling information simultaneously, then data transmission rate is improved, but channel collision and interference increase
Solution Approach 1:
The patent resolves channel collisions by introducing additional dimensions for resource allocation. Instead of only frequency and time resources, the system adds spatial dimension through beamforming and channel dimension through multiple scheduling channels. Each base station transmits on different combinations of these dimensions, allowing simultaneous transmissions without interference.
Solution Approach 2:
The patent introduces a coordinating mechanism as an intermediary between multiple base stations. The serving base station coordinates with neighboring base stations to allocate sub-scheduling channel resources, ensuring that simultaneous transmissions do not cause harmful interference. This intermediary coordination enables multiple base stations to contribute to data transmission while maintaining channel reliability.
3Reliability
If the terminal monitors multiple scheduling channels from multiple base stations, then scheduling information coverage is improved, but power consumption increases
Solution Approach 1:
The patent applies partial action by having the terminal selectively monitor sub-scheduling channels based on scheduling needs. The terminal always monitors the main scheduling channel for essential control information, but only monitors sub-scheduling channels when there is actual scheduling data to receive. This partial monitoring approach maintains reliable scheduling information reception while significantly reducing unnecessary power consumption compared to continuous monitoring of all channels.
4Power
If narrow beam width is used to increase antenna gain, then transmission efficiency is improved, but beam alignment precision requirements increase
Solution Approach 1:
The patent segments the scheduling information into main and sub-channels transmitted with different beamforming configurations. The main scheduling channel uses broader beams for reliable delivery, while sub-scheduling channels can use narrower beams for higher gain when alignment is achieved. This segmentation allows the system to benefit from narrow beam gain without requiring all transmissions to meet stringent alignment precision.
Data Source
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AI summary
According to an embodiment of the present invention, a method whereby a terminal receives scheduling data in a wireless communication system using beamforming comprises the processes of: receiving scheduling data via a first scheduling channel from a first base station; and receiving scheduling data via at least one second scheduling channel, by using at least one receiving beam from at least one second base station that cooperates (cooperate) with the first base station.