Dual Beam Sweep Resource Allocation for 5G Paging
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Solution Overview
Problem
Current wireless communication systems, particularly in high frequency bands like 5G, face challenges in efficiently scheduling Physical Downlink Shared Channel (PDSCH) beam sweeps due to the need for separate PDCCH and PDSCH beam sweeps, which can lead to excessively long paging occasions and resource allocation issues during high paging loads.
Innovation Solution
The use of reserved bits in the Downlink Control Information (DCI) for explicit or partial time domain resource allocation, allowing for longer scheduling gaps and flexible resource allocation configurations, enabling dual beam sweep paging and accommodating PDSCH sliding by indicating offsets or using extended time domain resource allocation tables.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If separate PDCCH and PDSCH beam sweeps are used, then beamforming coverage is improved, but paging occasion duration becomes excessively long
Solution Approach 1:
The PDCCH beam sweep is performed before the PDSCH beam sweep, allowing the control channel to establish beam directions in advance. The PDSCH then reuses the same beam directions without requiring a separate full beam sweep, thereby reducing the overall paging occasion duration while maintaining coverage.
Solution Approach 2:
The patent combines the PDCCH and PDSCH beam sweeps into a coordinated two-phase process where the PDSCH beam sweep leverages the beam configuration established by the PDCCH beam sweep. This merging approach reduces redundancy and shortens the total paging occasion time.
2Measurement precision
If more beams are used for beam sweep, then coverage precision is improved, but resource allocation complexity increases
Solution Approach 1:
The patent applies different beam configurations to different channels: PDCCH uses a first set of beam directions optimized for control signaling, while PDSCH uses a second set of beam directions optimized for data transmission. This localized optimization allows precise beamforming without requiring complex unified resource allocation across all channels.
3Adaptability or versatility
If PDSCH beam sweep is scheduled after PDCCH beam sweep, then scheduling flexibility is improved, but time resource efficiency deteriorates
Solution Approach 1:
The PDCCH beam sweep is executed as a preliminary action before the PDSCH beam sweep, establishing beam directions in advance. This allows the system to maintain scheduling flexibility while reducing the time required for the subsequent PDSCH transmission, thereby improving overall time resource efficiency.
Data Source
AI summary
A method, system and apparatus are disclosed. In one example, a network node configured for performing dual beam sweep, the dual beam sweep including a physical downlink control channel (PDCCH) beam sweep and a corresponding physical downlink shared channel (PDSCH) beam sweep that are separated in time to each other. The network node is configured to, and/or including a radio interface and/or including processing circuitry configured to: configured to: indicate, in a PDCCH transmission within the PDCCH beam sweep, a time domain resource allocation for the corresponding PDSCH beam, the time domain resource allocation corresponding to an offset in time slots between the PDCCH beam and the corresponding PDSCH beam, the offset being one of a plurality of offsets that can be indicated for the corresponding PDSCH beam; and perform the dual beam sweep using at least in part the indication.