Bandwidth Part Resource Allocation for 5G NR
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Solution Overview
Problem
Current communication systems, particularly 5G NR, face challenges in flexibly allocating frequency-domain resources, which limits the system's ability to adapt to diverse service requirements and scenarios, such as eMBB, mMTC, and URLLC, due to the inability to efficiently indicate resource allocation to User Equipment (UE).
Innovation Solution
A resource allocation indication method where a base station allocates frequency-domain target transmission resources to a terminal based on its capability, transmitting resource indication information to inform the terminal of the allocated resources, enhancing flexibility and utilization by using semi-static and dynamic indications for bandwidth parts and Physical Resource Block (PRB) locations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single subcarrier spacing of 15 kHz is used as in conventional LTE system, then the system structure is simple, but it cannot adapt to diverse service requirements such as eMBB, mMTC, and URLLC
Solution Approach 1:
The patent implements dynamic subcarrier spacing configuration where the system can switch between different subcarrier spacings (15 kHz, 30 kHz, 60 kHz, 120 kHz) based on service requirements. This is achieved through dynamic indication of frequency domain resource allocation information, allowing the system to adapt to varying service demands (eMBB, mMTC, URLLC) while maintaining a unified frame structure, thus resolving the contradiction between adaptability and complexity.
2Quantity of substance
If the NR system supports broadband transmission with bandwidth up to 1 GHz, then the system capacity is improved, but the UE cannot support the entirety of the bandwidth, limiting resource utilization flexibility
Solution Approach 1:
The patent segments the wideband frequency domain resources into multiple bandwidth parts (BWP), where each BWP can be independently configured and indicated to different UEs. This allows the system to support broadband transmission (up to 1 GHz) while UEs can be allocated appropriate subsets of the bandwidth based on their capabilities, thereby maintaining high system capacity while achieving flexible resource allocation adaptability.
Solution Approach 2:
Different bandwidth parts can be configured with different subcarrier spacings and other parameters optimized for specific service types. For example, one BWP can be optimized for eMBB with 15 kHz spacing while another BWP is optimized for URLLC with 60 kHz spacing. This local optimization within the overall broadband system resolves the contradiction between supporting large bandwidth and providing flexible, service-specific resource allocation.
3Productivity
If frequency domain resources are allocated without flexible indication mechanisms, then the signaling overhead is reduced, but the system cannot efficiently indicate resource allocation to meet diverse service requirements
Solution Approach 1:
The patent uses semi-static configuration of bandwidth parts and resource allocation parameters through RRC signaling, establishing default resource allocation patterns in advance. During dynamic scheduling, only minimal indication information is needed to point to pre-configured resource patterns. This preliminary configuration reduces the signaling overhead for dynamic resource indication while maintaining high resource allocation efficiency for diverse services.
Solution Approach 2:
The patent employs Type 0 resource allocation where resource allocation information is copied from a pre-configured resource allocation table. Instead of transmitting detailed resource allocation information for each scheduling decision, the system transmits a compact index that points to pre-defined resource patterns. This copying mechanism significantly reduces signaling overhead while maintaining efficient and flexible resource allocation capability.
Data Source
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AI summary
A resource allocation indication method, a base station and a terminal are provided. The method includes allocating corresponding target transmission resources to a terminal when a target service occurs, wherein the target transmission resources include uplink or downlink transmission resources; transmitting resource indication information to the terminal according to the target transmission resources, wherein the resource indication information includes first and second indication information, the first indication information is used to indicate one or more bandwidth parts of the target transmission resources, the one or more bandwidth parts are a portion or all of a total bandwidth, the second indication information is used to indicate location information of PRBs allocated to the terminal in PRBs corresponding to the one or more bandwidth parts.