DMRS Sequence Initialization for PUCCH Format 2 in 5G Uplink
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Solution Overview
Problem
Current 5G communication systems face challenges in efficiently configuring and transmitting uplink control channels, particularly for short Physical Uplink Control Channel (PUCCH) formats like PUCCH format 2, due to limitations in demodulation reference signal (DMRS) sequence initialization and resource allocation, which affect data transmission reliability and speed.
Innovation Solution
A method and device for initializing a DMRS sequence for PUCCH format 2, where a base station transmits control messages to a terminal to configure the PUCCH resource, including information for DMRS mapping types A and B, allowing the terminal to receive and transmit DMRS based on a scrambling identity, thereby optimizing DMRS sequence generation and resource identification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If DMRS sequence initialization for PUCCH format 2 uses existing PUSCH mapping methods, then device complexity is reduced, but uplink control channel transmission reliability deteriorates due to insufficient resource allocation precision
Solution Approach 1:
The patent segments the DMRS configuration into two distinct mapping types (Type A and Type B) with different initialization methods. Type A uses PUSCH mapping type A parameters while Type B uses PUSCH mapping type B parameters, allowing specialized optimization for each PUCCH format requirement without requiring a completely new configuration system
Solution Approach 2:
The patent changes the initialization parameters based on the mapping type. For mapping type A, it uses parameters from PUSCH mapping type A configuration, while for mapping type B, it uses parameters from PUSCH mapping type B configuration. This parameter adaptation enables reliable PUCCH format 2 transmission by matching the initialization method to the specific resource allocation pattern
2Ease of operation
If DMRS resource allocation follows traditional PUSCH methods, then ease of operation is improved, but data transmission speed deteriorates due to suboptimal resource identification
Solution Approach 1:
The patent makes the DMRS configuration system universal by supporting both mapping type A and mapping type B through a unified PUCCH resource configuration. The base station can flexibly select which mapping type to apply based on traffic conditions, achieving both ease of operation through standardized procedures and high speed through optimized resource identification
Solution Approach 2:
The patent introduces dynamic selection between mapping type A and mapping type B for PUCCH format 2 DMRS initialization. The system can adaptively choose the appropriate mapping type based on current transmission requirements, enabling flexible optimization of transmission speed without sacrificing operational simplicity
3Device complexity
If PUCCH format 2 uses simplified DMRS initialization, then device complexity is reduced, but measurement precision deteriorates affecting demodulation accuracy
Solution Approach 1:
The patent applies parameter changes based on the mapping type to maintain measurement precision. By using specific PUSCH mapping type parameters (either Type A or Type B) to initialize the DMRS sequence for PUCCH format 2, the system ensures the sequence accuracy required for reliable demodulation while keeping the initialization procedure straightforward
Data Source
AI summary
The disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. A base station in a wireless communication system includes a transceiver configured to transmit and receive a signal; and a controller configured to transmit, to a terminal, a control message including first information configuring a physical uplink control channel (PUCCH) resource of a PUCCH format 2, second information associated with a demodulation reference signal (DMRS) for physical uplink shared channel (PUSCH) of a mapping type A, and third information associated with a DMRS for PUSCH of a mapping type B, identify the PUCCH resource based on the first information, and receive, from the terminal on the PUCCH resource, a DMRS for PUCCH format 2 based on the control message. A sequence of the DMRS for PUCCH format 2 is generated based on a scrambling identity (ID) included in the third information of the control message.