Sector Sweep Packet Encoding for Multi-Antenna Beam Training
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Solution Overview
Problem
The existing sector level sweep method in high-frequency communication, particularly in the millimeter-wave band, faces challenges in efficiently indicating multiple antennas during beam training, leading to increased signal attenuation and transmission latency due to limitations in current frame formats.
Innovation Solution
The proposed method enhances the sector level sweep procedure by introducing a sector sweep packet that includes beam indication information, allowing for the indication of at least 8 antennas without exceeding 27 bytes, thereby supporting current multi-antenna scenarios and maintaining low transmission latency through efficient LDPC code block management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the sector sweep packet includes beam indication information for multiple antennas, then the multi-antenna capability is improved, but the packet size increases leading to increased transmission latency
Solution Approach 1:
The beam indication information is segmented into two parts: a 3-bit antenna field indicating up to 8 antennas, and a 12-bit beam field indicating up to 4096 beams per antenna. This segmentation allows efficient encoding that balances multi-antenna support with compact packet size, preventing excessive transmission latency while maintaining versatility.
Solution Approach 2:
The patent introduces a hierarchical dimension to beam indication by separating antenna selection (3 bits) from beam selection (12 bits) within each antenna. This dimensional separation enables support for multiple antennas and multiple beams per antenna without linearly increasing the total indication bits, thus managing packet size effectively while enhancing multi-antenna adaptability.
2Adaptability or versatility
If the sector sweep packet size is increased to include more antenna information, then the multi-antenna support is improved, but the LDPC code block quantity increases leading to higher overhead
Solution Approach 1:
The patent optimizes the parameter allocation within the sector sweep packet by using exactly 3 bits for antenna indication (supporting 8 antennas) and 12 bits for beam indication (supporting 4096 beams). This parameter configuration achieves the required multi-antenna capability while keeping the total indication field size at 15 bits, which fits within the existing LDPC code block structure without increasing code block quantity.
3Ease of operation
If conventional sector sweep frames are used, then transmission simplicity is maintained, but the quantity of antennas that can be indicated is insufficient for current multi-antenna scenarios
Solution Approach 1:
The patent enhances the conventional sector sweep frame by integrating a universal beam indication mechanism that works across all antennas. The 3-bit antenna field combined with the 12-bit beam field creates a unified indication structure that can represent any antenna-beam combination, making the frame versatile for multi-antenna scenarios while maintaining the simplicity of the original transmission procedure.
Data Source
AI summary
A sector level sweep method and apparatus are provided. A local end generates a first sector sweep packet at the local end sector sweep stage, and the local end sends the first sector sweep packet to a peer end by using a first beam. A quantity of bytes of the first sector sweep packet is not greater than 27, the first sector sweep packet includes beam indication information of the first beam, the beam indication information includes antenna identification information of the beam, and a maximum quantity of antennas indicated by the antenna identification information is at least 8.