D2D Relay Resource Allocation for NB-IoT Power Reduction
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Solution Overview
Problem
The TTI bundling technology in NB-IoT systems leads to high power consumption and resource waste due to the need for user equipment to remain powered on for extended periods, as it repeatedly transmits data packets across multiple Transmission Time Interval resources.
Innovation Solution
Implementing a device-to-device (D2D) relay transmission method that uses resource blocks in a resource pool for information transmission, allowing for unicast transmissions and reducing the need for repeated data packet transmission, thereby lowering power consumption and improving resource utilization efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If TTI bundling technology is used to increase network coverage, then transmission quality is improved, but user equipment must remain powered on for long periods causing high power consumption
Solution Approach 1:
The patent applies dynamics by making the resource block allocation flexible and adaptive based on transmission type. For unicast transmissions, only single resource blocks are allocated dynamically when needed, while for multicast/broadcast, resource block pairs are used. This dynamic allocation allows the system to optimize resource usage and reduce power consumption by avoiding continuous monitoring of multiple resource blocks for unicast transmissions.
Solution Approach 2:
The patent changes the parameter of resource block allocation from a fixed bundling approach to a variable approach based on transmission type. By changing the allocation pattern (single RB for unicast, RB pair for multicast/broadcast) and the associated monitoring requirements, the system reduces the time user equipment must remain powered on, thereby reducing power consumption while maintaining transmission quality.
2Reliability
If TTI bundling repeatedly transmits data packets on multiple TTI resources, then coverage is expanded, but resource utilization efficiency deteriorates
Solution Approach 1:
The patent segments the resource allocation based on transmission type. Unicast transmissions use single resource blocks with targeted allocation, while multicast/broadcast transmissions use resource block pairs. This segmentation allows efficient resource utilization by matching the allocation strategy to the specific transmission requirements, avoiding the waste of using bundled resources for all transmission types.
Solution Approach 2:
The patent applies local quality by assigning different resource allocation qualities to different transmission types. Unicast transmissions receive optimized single resource block allocation with precise scheduling, while multicast/broadcast transmissions receive resource block pair allocation. This localized optimization improves overall resource utilization efficiency while maintaining the coverage benefits of repeated transmission where needed.
3Reliability
If user equipment remains powered on for extended periods to ensure data packet transmission integrity, then transmission reliability is improved, but power consumption increases
Solution Approach 1:
The patent introduces scheduling information as an intermediary that carries critical transmission parameters and resource allocation details. By encoding this information in compact form and transmitting it efficiently, the system enables user equipment to process only essential data during brief powered-on periods, maintaining transmission integrity while minimizing the duration of power consumption.
Solution Approach 2:
The patent enables user equipment to efficiently process scheduling information and autonomously determine when to remain powered on based on the allocated resource blocks. This self-service approach allows the device to minimize power consumption by staying powered on only for the necessary duration to receive and process its specific unicast transmissions, rather than remaining powered on for extended periods.
Data Source
AI summary
Embodiments of the present invention provide a method for information transmitting, receiving and controlling, a transmitting device, a receiving device, and a base station. An information transmitting method according to an embodiment of the present invention is performed by the transmitting device, the transmitting device transmits information to a receiving device by using resource block in a resource pool which includes a plurality of resource blocks, and the information transmitting method includes: determining an information transmitting manner; transmitting scheduling information for one unicast transmission by using single resource block of the plurality of resource blocks when the information transmitting manner is unicast; transmitting scheduling information for one multicast or broadcast transmission by using a resource block pair of the plurality of resource blocks when the information transmitting manner is multicast or broadcast.