HARQ Timing Allocation for Multi-Service QoS in 5G
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Solution Overview
Problem
In existing HARQ solutions for 5G communications, a terminal device with multiple services can only use a single HARQ timing, which fails to meet the diverse quality of service (QoS) requirements for different services, such as enhanced mobile broadband and ultra-reliable low latency machine type communication.
Innovation Solution
A method where a network device allocates multiple HARQ timings to a terminal device, allowing each service to use a specific HARQ timing, indicated through various means such as DCI messages, RNTIs, and resource mapping, to improve QoS by distinguishing HARQ feedback for each service.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a single HARQ timing is used for all services, then the system complexity is reduced and ease of operation is improved, but the quality of service for different services cannot be met
Solution Approach 1:
The patent segments the single HARQ timing into multiple service-specific HARQ timings. Each service (e.g., eMBB, uMTC, mMTC) is assigned its own HARQ timing parameter, allowing independent optimization for different QoS requirements while maintaining a unified configuration framework managed by the network device.
Solution Approach 2:
The patent applies local quality by allowing different HARQ timing characteristics for different services. Each service can have customized HARQ timing parameters (k1, k2, k3 values) tailored to its specific QoS needs, such as low latency for uMTC or high throughput for eMBB, rather than using a uniform timing for all services.
2Reliability
If multiple HARQ timings are allocated to different services, then the quality of service for each service is improved, but the device complexity and indication overhead increase
Solution Approach 1:
The patent implements universality by creating a unified HARQ timing configuration framework that can accommodate multiple services with different requirements. The network device maintains a universal set of HARQ timing parameters that can be selectively applied to different services through indication information, avoiding the need for completely separate HARQ mechanisms for each service.
Solution Approach 2:
The patent uses parameter changes to manage multiple HARQ timings efficiently. Instead of creating complex separate structures for each service, the system varies HARQ timing parameters (such as k1, k2, k3 values) to adapt to different service requirements. The indication information selectively activates appropriate parameter sets for each service, reducing overall system complexity.
3Adaptability or versatility
If service-specific HARQ timings are implemented, then the adaptability to different service requirements is improved, but the indication information overhead and processing difficulty increase
Solution Approach 1:
The patent introduces indication information as an intermediary between the HARQ timing parameters and the services. This intermediary efficiently maps services to their corresponding HARQ timings using compact representations (such as index values or bit fields in DCI messages), reducing the overhead compared to explicit signaling while maintaining clear identification of the appropriate timing for each service.
Data Source
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AI summary
This application provides a method, network device, and terminal device for transmitting information. The method includes: determining, by a network device from a plurality of hybrid automatic repeat request HARQ timings, a first HARQ timing corresponding to a first service of a terminal device; and sending, by the network device, indication information to the terminal device, where the indication information is used to indicate the first HARQ timing. According to the method, the network device, and the terminal device that are provided in this application, the indication information is sent to the terminal device, so that when the terminal device uses a plurality of services, different HARQ timings can be used for different services, to improve QoS of a service.