SSB Beam Coverage Using Complementary Initial BWP Resources
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Solution Overview
Problem
The coverage of synchronization signal blocks (SSB) beams in 5G systems is limited due to the use of narrow beams, which results in a smaller coverage envelope compared to data channels, and existing solutions do not effectively enhance SSB beam coverage.
Innovation Solution
A method involving a communication apparatus that transmits multiple SSB beams on different initial BWP resources, allocated to different or same bands, and in complementary partial areas to improve coverage, allowing for flexible and robust SSB beam coverage by alternating or overlapping beam directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If narrow beams are used for SSB in 5G systems, then beamforming gain and spatial multiplexing are improved, but coverage envelope becomes smaller compared to data channels
Solution Approach 1:
The patent divides the coverage area into multiple sectors and further segments each sector into multiple partial areas. Multiple SSB beam sets are transmitted in different partial areas, allowing the system to achieve narrow beamforming gain within each partial area while collectively covering the entire sector, thus resolving the contradiction between narrow beam gain and overall coverage envelope.
2Area of stationary object
If wide beams are used for SSB, then coverage envelope is improved, but beamforming gain becomes small
Solution Approach 1:
Instead of using a single wide beam, the patent segments the coverage area into multiple partial areas and transmits focused narrow beams in each segment. This allows the system to maintain narrow beamforming gain while achieving wide overall coverage through the combination of multiple segmented beams.
3Adaptability or versatility
If multiple initial BWP resources are allocated for SSB beam sets, then coverage flexibility and robustness are improved, but device complexity increases
Solution Approach 1:
The patent segments the bandwidth into multiple initial BWP resources and allocates different SSB beam sets to different BWPs. This segmentation approach provides flexibility and robustness by allowing independent configuration of each BWP while maintaining manageable complexity through systematic resource division.
Solution Approach 2:
The patent introduces the BWP dimension as an additional resource allocation layer. By allocating SSB beam sets across multiple initial BWP resources in the frequency domain, the system enhances coverage flexibility without significantly increasing time or spatial complexity.
Data Source
AI summary
A coverage enhancement method and an apparatus are disclosed. The method includes transmitting N first SSB beams in a first SSB beam set on a first initial bandwidth part BWP resource, and transmitting M second SSB beams in a second SSB beam set on a second initial BWP resource, where coverage of the first SSB beam set is located in a first partial area of a sector, coverage of the second SSB beam set is located in a second partial area of the sector, and N and M are positive integers. In this way, complementary coverage of a first SSB beam and a second SSB beam is implemented in the sector.