Bandwidth Part Allocation for Flexible Resource Signaling
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Solution Overview
Problem
In new radio (NR) systems, the maximum bandwidth supported by terminal devices is often less than the system bandwidth, making it difficult to allocate resources efficiently, as the resource allocation methods used in long-term evolution (LTE) are not applicable, leading to challenges in flexible resource allocation and increased signaling overheads.
Innovation Solution
A two-step resource allocation method is introduced, where a network device allocates a bandwidth part (BP) to a terminal device, with the BP consisting of sub-BPs, and sends a message indicating the resource position of these sub-BPs, allowing for flexible configuration based on the terminal device's maximum bandwidth, carrier frequency, or pre-defined sizes, thereby reducing signaling overheads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If LTE resource allocation method is used in NR system, then resource allocation can be performed, but it cannot accommodate terminal devices with maximum bandwidth less than system bandwidth
Solution Approach 1:
The patent divides the system bandwidth into multiple bandwidth parts (BWPs), each with different bandwidth sizes. This segmentation allows the network to allocate appropriate bandwidth portions to terminal devices based on their capabilities, enabling LTE-style resource allocation to work for terminals with limited bandwidth by assigning them a suitable BWP rather than requiring the full system bandwidth.
2Adaptability or versatility
If bandwidth part allocation is implemented, then flexible resource allocation is achieved, but signaling overhead increases
Solution Approach 1:
The patent pre-configures multiple bandwidth parts with different bandwidth sizes before resource allocation. The network stores these pre-defined BWP configurations and selects the appropriate one based on terminal capabilities and system conditions. This preliminary preparation reduces the need for extensive real-time signaling when allocating resources, as the framework for different bandwidth scenarios is already established.
Data Source
AI summary
A resource indication method, a device, and a system relate to the field of communications technologies. The method includes: allocating, by a base station, a BP to a terminal device, and sending, to the terminal device, a first message indicating a resource position of the BP; and receiving, by the terminal device, the first message sent by the base station, and then determining the resource position of the BP based on resource position information of at least one sub-BP, where the BP includes the at least one sub-BP, the BP is not greater than a maximum bandwidth supported by the terminal device, and the first message includes the resource position information of the at least one sub-BP. The BP is allocated by using a sub-BP as a granularity, so that signaling overheads can be reduced while a requirement for more flexible resource allocation is satisfied.