Wireless Beam Signaling for Uplink-Downlink Spatial Consistency
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Solution Overview
Problem
The challenge in wireless communication systems is ensuring consistency and communication quality between the transmitting and receiving ends when beam management for control and data channels is not synchronized, particularly in scenarios where channel reciprocity exists between uplink and downlink channels.
Innovation Solution
A method and device for wireless communication that uses physical-layer signaling to determine and update beams for both control and data channels, ensuring spatial relation consistency by indicating whether the target channel is uplink or downlink, and adjusting beams accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate beam management mechanisms are used for control channels and data channels, then beam optimization for each channel can be achieved, but system complexity increases and consistency between channels deteriorates
Solution Approach 1:
The patent merges the beam management mechanisms for control channels and data channels into a unified system. The network device determines a target beam for the control channel and applies it to both the control channel and data channel, eliminating the need for separate beam management mechanisms while maintaining consistency between channels.
Solution Approach 2:
The target beam determined for control channel purposes is made universally applicable to both control channels and data channels. This multi-functional use of the same beam management mechanism reduces system complexity while ensuring consistent beam performance across different channel types.
2Speed
If physical layer signaling is used to update beams for control and data channels, then beam update speed increases, but consistency between transmitting and receiving ends may deteriorate
Solution Approach 1:
The patent implements a feedback mechanism where the network device determines the target beam and signals it to the terminal device through physical layer signaling. The terminal device uses this signaled beam for both control and data channel reception, ensuring both ends maintain consistency while achieving rapid beam updates through the efficient physical layer signaling protocol.
3Device complexity
If unified beam management is applied to control and data channels, then system complexity reduces and consistency improves, but channel-specific beam optimization may deteriorate
Solution Approach 1:
The patent applies local quality by determining the target beam based on control channel characteristics and then applying this beam to both control and data channels. This approach maintains the specialized optimization needed for control channels while extending the benefits to data channels, achieving a balance between unified management and channel-specific performance.
Data Source
AI summary
A method and a device in a node for wireless communications. A first node receives a first signaling, the first signaling being used to determine a first time; and receives a first reference signal after the first time. The first signaling is used to indicate a target reference signal; after the first time, the target reference signal is used to determine a spatial relation of a transmission on a target channel, and the first signaling is used to indicate whether the target channel is an uplink physical layer channel or a downlink physical layer channel; whether the target channel is an uplink physical layer channel or a downlink physical layer channel is used to determine whether the first reference signal and the target reference signal are spatially related; when the target channel is an uplink physical layer channel and the first reference signal belongs to a first reference signal set.