Active Coordination Set Downlink Time Domain Resource Allocation
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Solution Overview
Problem
At higher frequencies, such as in the 3.5 GHz and/or mmWave frequency bands, user equipment (UE) can only tune to a single beam at a time, limiting its ability to concurrently receive information via multiple beams from Active Coordination Set (ACS) base stations, which affects downlink performance and data payload fidelity.
Innovation Solution
The system enhances downlink performance by allocating subsets of time domain resources to each base station in the ACS, providing the UE with information about these allocations, and allowing the UE to tune to multiple beams formed by different base stations in accordance with their allocated resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a UE tunes to a single beam at a time at higher frequencies, then the UE can simplify its receiver design and reduce processing complexity, but the downlink performance and data payload fidelity deteriorate because the UE cannot concurrently receive information via multiple beams from ACS base stations
Solution Approach 1:
The system segments the reception process by allocating specific time domain resources (time slots, symbols, or subcarriers) to different base stations in the ACS. The UE receives information from multiple base stations during different segmented time resources, then combines these segmented receptions to achieve diverse beam reception without requiring simultaneous multi-beam capability
Solution Approach 2:
The system dynamically allocates time domain resources to different base stations based on channel conditions, UE mobility, and traffic requirements. The UE dynamically tunes to different beams during different time resources according to the allocated schedule, enabling adaptive multi-beam reception that optimizes downlink performance while maintaining manageable receiver complexity
2Reliability
If the UE receives information from multiple base stations simultaneously via multiple beams, then the downlink performance and data completeness improve, but the UE requires multiple antenna systems and concurrent multi-beam processing capability which increases device complexity
Solution Approach 1:
The system divides the time domain into distinct resources allocated to different base stations. The UE uses a single antenna system to receive signals from multiple base stations sequentially during different time slots, eliminating the need for multiple concurrent antenna systems while maintaining the benefit of multi-base station diversity
Solution Approach 2:
The system implements periodic time domain resource allocation where different base stations transmit during periodic time intervals. The UE periodically tunes to different beams according to this periodic schedule, achieving time-division multiplexed reception from multiple base stations using a single antenna system
Data Source
AI summary
The techniques described in this disclosure enhance the reception of the information at a user equipment (UE) from an Active Coordination Set (ACS) of a wireless network system, where the ACS includes a set of base stations that jointly operate to communicate data between the system and the UE. The ACS allocates respective subsets of a plurality of time domain resources for use by corresponding ACS base stations in communicating with the UE, and provides, to the UE, an indication of the allocations. Based on the received allocation indication (502), the UE obtains data payload transmitted by the ACS (508) by tuning to various base stations in accordance with their respective time domain resource allocations (505). The ACS may redundantly transmit selected data payload and/or employ different encoding schemes to further enhance reception of information at the UE.