Multi-Carrier Beam TCI State Determination for 5G Coverage
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Solution Overview
Problem
Current multiple beam technology is primarily used in single-carrier scenarios and does not effectively apply to multi-carrier scenarios, posing a challenge for ensuring coverage in high-frequency New Radio (NR)/5G systems.
Innovation Solution
The method involves using a terminal device to apply multiple beam technology across multiple carriers by determining a target Transmission Configuration Indicator (TCI) state, which enables the device to receive Physical Downlink Shared Channel (PDSCH) signals from multiple Transmit-Receive Points (TRPs)/panels/beams across different component carriers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple beam technology is used in single-carrier scenarios, then coverage capability is improved, but it cannot be applied to multi-carrier scenarios
Solution Approach 1:
The patent extends the multiple beam technology originally designed for single-carrier scenarios to multi-carrier scenarios by defining a unified TCI state indication mechanism that works across multiple component carriers. The network device configures TCI states and indicates them through DCI formats that are applicable to both single-carrier and multi-carrier operations, making the system universal and adaptable to different carrier configurations.
2Productivity
If operating frequency is increased to achieve large-bandwidth communications, then transmission capacity is improved, but path loss increases and coverage capability deteriorates
Solution Approach 1:
The patent divides the transmission into multiple beams, each targeting specific spatial directions or user equipment. By segmenting the overall transmission task into multiple directional beams, the system can concentrate power in each beam to overcome path loss at high frequencies, while the collective coverage of all beams provides the required overall coverage area.
Solution Approach 2:
The patent introduces spatial dimension through beamforming to compensate for frequency-related path loss. Instead of relying solely on increasing power in the frequency domain, the system adds a spatial dimension by directing energy along multiple specific paths, effectively combating the increased path loss inherent in high-frequency large-bandwidth communications.
3Reliability
If TCI state indication is added to DCI format to support multi-carrier multiple beam technology, then multi-carrier coverage is improved, but signaling overhead increases
Solution Approach 1:
The patent merges the TCI state indication with the existing DCI format structure used for scheduling PDSCH. Instead of creating a separate signaling mechanism, the TCI state information is integrated into the existing DCI fields, thereby reducing additional signaling overhead while still providing the necessary multi-carrier multiple beam support.
Data Source
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AI summary
Embodiments of the present invention provide an information processing method, comprising: a terminal device receives first downlink control information (DCI) on a first activated bandwidth portion (BWP) of a first component carrier (CC), the first DCI being transmitted on a resource indicated by a first control resource set (CORESET) corresponding to the first activated BWP, a first physical downlink shared channel (PDSCH) scheduled by the first DCI being carried on a second activated BWP of a second CC. Also disclosed are a terminal device and a storage medium.