Two-Part UCI Transmission for Group-Based Beam Reporting
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in transmitting uplink control information (UCI) for group-based beam reporting, particularly in 5G networks, where the increasing number of beam groups leads to larger UCI payloads that consume network resources and increase complexity, necessitating a more efficient method to reduce network usage and maintain performance.
Innovation Solution
The method involves transmitting a CSI report that includes a first and second UCI separately, where the first UCI indicates the number of beam groups and the second UCI provides beam indexes and L1 metrics, allowing for a two-part UCI transmission based on configured beam groups or dedicated RRC indications, optimizing resource usage and reducing payload size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single UCI transmission is used for group-based beam reporting, then the transmission structure is simple, but the UCI payload size increases with the number of beam groups, consuming more network resources
Solution Approach 1:
The UCI payload is divided into two separate parts: first UCI containing first beam group information, and second UCI containing second beam group information. These two parts are transmitted independently on different physical uplink channels (PUCCH and PUSCH respectively), thereby segmenting the originally large single payload into smaller manageable units that reduce overall network resource consumption.
2Measurement precision
If the number of beam groups is increased to improve beam reporting accuracy, then the beam reporting precision improves, but the UCI payload size increases, consuming more network resources
Solution Approach 1:
The patent segments the beam group reporting into two independent UCIs, where each UCI handles a subset of beam groups. This allows the system to support a larger total number of beam groups for improved measurement precision while keeping each individual UCI payload size manageable, thus preventing excessive network resource consumption.
Solution Approach 2:
The patent transitions from a single-dimension payload structure to a two-dimension structure by separating UCIs across different transmission channels (PUCCH and PUSCH). This dimensional change enables the system to accommodate more beam groups without linearly increasing the burden on a single channel, effectively decoupling payload size from beam group count in terms of resource allocation.
3Ease of operation
If a single UCI transmission is used, then the transmission process is simple, but the network resource consumption increases due to larger payload size
Solution Approach 1:
The transmission process is segmented into two independent UCI transmissions rather than one large transmission. Although this increases the number of transmission operations, each individual transmission is simpler and more efficient due to the smaller payload size, resulting in reduced overall network resource consumption and more efficient use of uplink channels.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a base station associated with multiple transmit-receive points, a plurality of reference signals associated with a plurality of beam groups. The UE may transmit, to the base station, a channel state information (CSI) report that includes a group-based beam report indicating beam measurements associated with the plurality of reference signals, wherein the CSI report includes a first uplink control information (UCI) and a second UCI that is transmitted separately from the first UCI. Numerous other aspects are described.