Contention-Based PUSCH Resource Allocation for IoT Power Efficiency
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Solution Overview
Problem
In IoT environments, especially for UEs like those in Machine Type Communications (MTC) and Narrow Band Internet of Things (NB-IoTs), there is a high requirement for extended battery life due to deployment in challenging locations such as underwater or basements, where charging or battery replacement is inconvenient. This necessitates reducing power consumption and optimizing resource allocation for efficient data transmission.
Innovation Solution
A method for contention-based uplink data transmission is introduced, where a UE receives high-layer configuration information, monitors specific downlink control information (DCI) to determine a contention-based PUSCH resource, and transmits data on that resource. This approach optimizes the PUSCH resource indication manner, improving data transmission efficiency and reducing UE power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pre-configured uplink resource is dedicated to one UE (contention-free PUSCH transmission), then transmission reliability is improved, but system resource usage efficiency deteriorates
Solution Approach 1:
The patent applies universality by making PUSCH resources shared by multiple UEs rather than dedicated to a single UE. The base station configures PUSCH resources that can be used by multiple UEs in RRC idle mode, transforming the resource allocation from a dedicated one-to-one mapping to a shared many-to-one mapping, thereby improving system resource usage efficiency while maintaining transmission reliability through contention-based access mechanisms
2Reliability
If PUSCH resource is pre-configured by RRC signaling for each UE, then transmission reliability is improved, but signaling overhead increases and power consumption increases
Solution Approach 1:
The patent reduces power consumption by using universal RRC signaling that can configure PUSCH resources for multiple UEs simultaneously, rather than sending individual RRC signaling to each UE. This approach allows UEs to acquire resource allocation information through common signaling channels, reducing the frequency and amount of signaling operations each UE must process, thereby lowering power consumption while maintaining reliable transmission
Solution Approach 2:
The patent applies preliminary action by pre-configuring PUSCH resources for UEs in RRC idle mode before actual data transmission occurs. This allows UEs to have ready-to-use resource allocations without needing to establish RRC connections for each transmission, reducing the number of signaling exchanges and power-consuming operations during actual data transmission
3Reliability
If RRC connection is established for each PUSCH transmission, then transmission reliability is improved, but signaling overhead increases and power consumption increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring PUSCH resources for UEs while they are in RRC idle mode, before actual data transmission is needed. This preliminary configuration includes providing resource allocation information through RRC signaling or system information blocks, so that when data needs to be transmitted, UEs can immediately use the pre-configured resources without going through the complex RRC connection establishment process, thereby reducing signaling overhead
Solution Approach 2:
The patent extracts the resource allocation function from the RRC connection establishment process. Instead of requiring full RRC connection setup for each transmission, the essential resource allocation information is extracted and provided through simplified mechanisms such as system information blocks or pre-configured parameters, separating the resource allocation function from the complete connection establishment procedure and reducing overall signaling overhead
Data Source
AI summary
The present 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 present 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. Embodiments of the present application provide a method, a UE, a base station, a device, and a computer-readable storage medium for contention-based uplink data transmission. A method for contention-based uplink data transmission comprises: receiving high layer configuration information for a contention-based physical uplink shared channel (PUSCH) transmission; monitoring first downlink control information (DCI) scrambled with a first radio network temporary identity (RNTI) in a first physical downlink control channel search space based on the high layer configuration information, and determining a contention-based PUSCH resource based on the detected first DCI; and transmitting data on the contention-based PUSCH resource. The present application improves the data transmission efficiency and reduces the UE's power consumption.