Multi-TRP Control Reception With Soft Combining for 5G Reliability
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently transmitting and receiving control information in a wireless cooperative communication system, particularly in 5G networks, due to the need for improved methods to handle diverse service types like enhanced mobile broadband (eMBB), massive machine type communication (mMTC), and ultra-reliable low latency communication (URLLC), which require higher data rates, wider coverage, and reduced latency.
Innovation Solution
A method and apparatus for transmitting control information and downlink data repeatedly through multiple transmission and reception points (TRPs) in a 5G system, utilizing techniques such as beamforming and coordinated multi-points (CoMP) to enhance coverage and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If control information is transmitted through a single transmission point, then the system complexity is low, but the coverage and reliability are insufficient for diverse service types
Solution Approach 1:
The transmission system is segmented into multiple independent transmission points (TRPs), each capable of transmitting control information independently. This segmentation allows the system to achieve diversity gain and improved reliability through spatial distribution, while each individual TRP maintains relatively simple transmission functionality.
Solution Approach 2:
Multiple transmission points are merged into a coordinated multi-point transmission system where control information is simultaneously transmitted from multiple TRPs. This merging provides spatial diversity and redundancy, improving reliability for diverse service types (eMBB, mMTC, URLLC) while distributing the complexity across multiple nodes rather than concentrating it in a single complex transmitter.
2Reliability
If control information is transmitted repeatedly through multiple TRPs, then the coverage and reliability are improved, but the transmission time and processing overhead increase
Solution Approach 1:
Control information is transmitted periodically through multiple TRPs with coordinated timing. This periodic transmission ensures that control information reaches the user equipment reliably within defined time windows, improving coverage and reliability while maintaining predictable transmission time intervals that can be optimized for different service types.
Solution Approach 2:
The system performs preliminary configuration of multiple TRPs and their transmission parameters before actual control information transmission. This preliminary setup includes configuring transmission power, timing, and resource allocation, which enables efficient repeated transmissions without excessive processing overhead during actual operation.
3Productivity
If multiple transmission points are used for cooperative communication, then the data rate and coverage are enhanced, but the coordination complexity and signaling overhead increase
Solution Approach 1:
Multiple transmission points are configured with universal transmission capabilities and standardized interfaces, allowing them to function independently or in coordination. This multi-functionality enables the same TRP configuration to serve different service types (eMBB, mMTC, URLLC) with varying requirements, enhancing data rates and coverage while reducing coordination complexity through standardized protocols.
4Length of stationary object
If beamforming is applied in ultra-high frequency bands, then the path loss is reduced and transmission distance is increased, but the beam management complexity increases
Solution Approach 1:
The beam management function is segmented and distributed across multiple transmission points, each responsible for its own beamforming operations. This segmentation reduces the overall beam management complexity at any single point while collectively achieving wide coverage and long transmission distances through coordinated beamforming from multiple TRPs in ultra-high frequency bands.
Data Source
AI summary
According to an embodiment of the disclosure, a method performed by a user equipment in a wireless communication system is provided. The method may include repeatedly receiving, from a base station through a plurality of transmission and reception points (TRPs), control information having a same downlink control information (DCI) format and payload, repeatedly receiving, from the base station through the plurality of TRPs, downlink data corresponding to the control information, performing soft combining on the repeatedly received control information, and performing decoding on the control information, based on a result of the soft combining.