Flexible PDCCH and SS Block Multiplexing in NR High-Frequency Bands
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Solution Overview
Problem
The existing communication systems, particularly in the Long Term Evolution (LTE) and New Radio (NR) systems, face inefficiencies in resource utilization due to fixed time domain positions of control channels and synchronization signals, leading to high control signaling overheads and terminal complexity, especially in high-frequency bands.
Innovation Solution
A method is introduced where the terminal device and network device implement flexible time domain scheduling by overlapping or positioning Physical Downlink Control Channels (PDCCHs) with Synchronization Signals (SSs) and Physical Broadcast Channels (PBCHs within time domain scheduling units, allowing for efficient multiplexing and reduced overhead, while maintaining non-overlapping frequency domain resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the PDCCH and SS block occupy different time domain positions with fixed allocation, then the transmission requirements of NR high-frequency band are met, but the network resource utilization is low and control signaling overheads are high
Solution Approach 1:
The patent merges the PDCCH and SS block into the same time domain scheduling unit, allowing them to occupy overlapping time resources. This combining approach enables efficient multiplexing while meeting transmission requirements, thereby improving network resource utilization and reducing control signaling overheads.
Solution Approach 2:
The patent introduces flexible time domain positioning where the PDCCH can be positioned at different locations within the time domain scheduling unit, and the SS block can occupy different symbol ranges. This dimensional flexibility allows optimized resource allocation that improves utilization while maintaining transmission reliability.
2Ease of manufacture
If the PDCCH position is completely fixed in LTE system, then the implementation is simple, but the flexibility and adaptability of the system is reduced
Solution Approach 1:
The patent transforms the fixed PDCCH position into a dynamic configuration where the PDCCH can be positioned at different locations within the time domain scheduling unit based on actual transmission needs. This dynamic positioning maintains implementation simplicity while significantly improving system flexibility and adaptability.
Solution Approach 2:
The patent changes the parameter of PDCCH position from fixed to variable, allowing the position to be adjusted within the time domain scheduling unit. This parameter change enables the system to adapt to different transmission scenarios while keeping the implementation relatively simple.
3Reliability
If multiple SS blocks and PDCCHs are transmitted in different slots, then the transmission requirements are met, but the terminal complexity and control signaling overheads increase
Solution Approach 1:
The patent combines multiple SS blocks and PDCCHs into the same time domain scheduling unit, allowing the terminal to receive them simultaneously rather than sequentially in different slots. This merging reduces the number of separate reception operations required, thereby reducing terminal complexity while meeting transmission requirements.
Solution Approach 2:
The patent enables the terminal to receive the PDCCH and SS block in advance within the same time domain scheduling unit, allowing the terminal to prepare for subsequent data reception more efficiently. This preliminary action reduces the overall complexity of the terminal processing sequence.
Data Source
AI summary
An information transmission method, a terminal device and a network device are provided. The method includes: a terminal device receives a first synchronization signal block and a physical downlink control channel sent by a network device in a first time slot or a first mini-slot, the first time slot or the first mini-slot includes N symbols, the first synchronization signal block occupies M consecutive symbols in the first time slot or the first mini-slot, the first synchronization signal block includes a synchronization signal and a physical broadcast channel, M and N are positive integers, and M≤N.