NB-IoT Uplink SPS Configuration to Reduce Resource Waste
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Solution Overview
Problem
In NB-IoT systems, the lack of a physical uplink control channel (PUCCH) leads to high power consumption and resource wastage due to dynamic scheduling, as the base station cannot determine when to configure semi-persistent scheduling (SPS), resulting in inefficient resource allocation for uplink data transmission.
Innovation Solution
A method and device for configuring semi-persistent scheduling (SPS) by allowing the terminal device to apply for SPS directly, with the network device providing configuration information without needing to determine if SPS is required, reducing resource waste and power consumption by eliminating the need for dynamic scheduling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If dynamic scheduling is used in NB-IoT systems, then the base station can allocate uplink resources flexibly, but network resources are wasted due to a large quantity of PDCCHs being sent to each transport block
Solution Approach 1:
The patent applies preliminary action by pre-configuring semi-persistent scheduling resources for the terminal device. The base station allocates uplink resources in advance through SPS configuration rather than sending dynamic PDCCH scheduling for each transport block. This pre-allocation mechanism reduces the quantity of PDCCH messages needed while maintaining flexible resource allocation capability, thereby resolving the contradiction between scheduling flexibility and network resource efficiency.
2Device complexity
If the terminal device applies for uplink resources only through random access process, then the system simplifies terminal structure by removing PUCCH, but power consumption increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring semi-persistent scheduling resources for the terminal device. The base station allocates uplink resources in advance through SPS configuration rather than sending dynamic PDCCH scheduling for each transport block. This pre-allocation mechanism reduces the quantity of PDCCH messages needed while maintaining flexible resource allocation capability, thereby resolving the contradiction between scheduling flexibility and network resource efficiency.
3Productivity
If SPS is configured based on voice service detection in LTE system, then voice services receive optimized resource allocation, but non-voice services in NB-IoT cannot determine whether SPS is needed, leading to resource waste
Solution Approach 1:
The patent applies universality by extending the SPS mechanism to serve multiple service types in NB-IoT systems, not limiting it to voice services only. The base station can configure SPS for various uplink data transmission scenarios including but not limited to voice services. This multi-functional application of SPS enables efficient resource allocation across different service types, resolving the contradiction between optimized voice service allocation and resource waste in non-voice services.
Data Source
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AI summary
A resource configuration method and a device are provided, to reduce a resource waste. The resource configuration method includes: applying, by a terminal device, to a network device for semi-persistent scheduling; receiving, by the terminal device, configuration information sent by the network device, where the configuration information is used to configure a first semi-persistent scheduling resource for the terminal device; configuring, by the terminal device, the first semi-persistent resource for the terminal device based on the configuration information; and sending, by the terminal device, uplink data to the network device on the first semi-persistent scheduling resource.