Beam Pair Link Identifier Mapping for Reducing Signaling Overhead
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Solution Overview
Problem
In large-scale antenna systems, the indication of beam information is inefficient due to the high number of beams, requiring 8 bits, 10 bits, or more, leading to significant overhead in transmitting beam information between the transmitting and receiving ends.
Innovation Solution
A method and device that establish a mapping relationship between Beam Pair Link (BPL) identifiers and Channel State Information-Reference Signal Resource Indicators (CRIs) at both ends, allowing the receiving end to determine corresponding receiving beams based on BPL identifiers, reducing the need to transmit extensive beam information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the number of beams is increased to improve coverage and signal quality in large-scale antenna systems, then the beamforming gain and coverage area are improved, but the indication overhead of beam information increases significantly requiring 8 bits, 10 bits, or more
Solution Approach 1:
The patent introduces BPL identifiers as an intermediary element that indirectly indicates beam information. Instead of directly indicating detailed beam parameters which require extensive bits, the system uses compact BPL identifiers that serve as mediators between the transmitter and receiver, enabling beam information indication with reduced overhead while maintaining the ability to support large numbers of beams for improved coverage
Solution Approach 2:
The patent segments the beam information indication process into two parts: BPL identifier indication and beam determination. The BPL identifier contains essential information to identify beam pairs, while the actual beam selection is determined by the receiving end based on stored mapping relationships. This segmentation allows the indication overhead to be reduced while still supporting large-scale antenna systems with extensive beam coverage
2Measurement precision
If detailed beam information is transmitted to ensure accurate beam selection, then the beam indication accuracy is improved, but the transmission efficiency and system overhead are degraded
Solution Approach 1:
The patent extracts only the essential identification information into compact BPL identifiers, separating the critical beam pairing identification from the detailed beam parameters. The receiving end extracts the necessary beam selection information from the BPL identifier by consulting stored mapping relationships between BPL identifiers and beam configurations, achieving accurate beam indication without transmitting redundant detailed information, thus improving transmission efficiency while maintaining precision
Solution Approach 2:
The patent implements preliminary action by pre-establishing mapping relationships between BPL identifiers and beam configurations at the receiving end before actual beam indication is needed. This allows the receiving end to quickly and accurately determine the appropriate beam based on the received BPL identifier without requiring extensive real-time processing or additional information transmission, thereby improving both accuracy and transmission efficiency
Data Source
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AI summary
The present application is for use in reducing the overhead of transmitting beam information between a transmitting end and a receiving end. Disclosed are a method for indicating and determining beam information, a device, and a communication system. The method provided in the present application for indicating beam information comprises: a transmitting end determines a first transmission beam that needs to be used for transmission with a receiving end; the transmitting end determines, on the basis of first mapping relations between beam pair (BPL) identifiers and transmission beams, a first BPL identifier corresponding to the first transmission beam, where the receiving end is provided with second mapping relations between the BPL identifiers and reception beams; the transmitting end transmits the first BPL identifier to the receiving end; and the transmitting end uses the first transmission beam to transmit a signal to the receiving end.