Terminal Resource Period Start Time Determination for D2D Communication
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Solution Overview
Problem
Conventional device-to-device communication systems face challenges in adapting to large numbers of terminals, leading to poor transmission performance due to fixed resource pool allocations and random data packet generation times, resulting in latency and inflexible data packet transmission.
Innovation Solution
A communication method and apparatus that allow terminals to determine a flexible start time unit for resource periods, enabling autonomous selection of transmission resources and improving data packet transmission efficiency by aligning with actual data generation times, reducing latency and enhancing overall transmission performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed resource pool allocation mode is used for device-to-device communication, then resource management is simplified, but transmission performance deteriorates when the quantity of terminals is large due to inability to adapt to service features
Solution Approach 1:
The patent applies dynamics by enabling terminals to autonomously select time domain resources from the resource pool based on their actual data generation times and service requirements, rather than using fixed network-side allocations. This dynamic selection allows the system to adapt to varying service features and terminal quantities, improving transmission performance while maintaining relatively simple resource management through autonomous terminal decisions
2Reliability
If network-side device allocates time domain resources for every terminal, then transmission performance is improved through dedicated resources, but device complexity and signaling overhead increase
Solution Approach 1:
The patent implements self-service by allowing terminals to autonomously select time domain resources from the configured resource pool based on their own data generation characteristics and service requirements. This eliminates the need for complex network-side allocation for each terminal, reducing signaling overhead and resource management complexity while maintaining good transmission performance through autonomous resource selection
3Device complexity
If random data packet generation times are accommodated with fixed resource pools, then resource pool structure is simple, but latency increases due to misalignment between resource periods and actual data generation times
Solution Approach 1:
The patent resolves this contradiction by enabling terminals to dynamically select time domain resources that align with their actual data generation times. Terminals can autonomously choose resources within the fixed resource pool structure that best match their service requirements, thereby reducing latency caused by misalignment between fixed resource periods and random data generation times, while maintaining the simplicity of the overall resource pool structure
Data Source
Figure 1A~1B
Figure 2A
Figure 2B
AI summary
A communication method and a communications apparatus are disclosed. In the communication method, a first terminal obtains (S201) a resource period parameter, where the resource period parameter is sent by a network-side device or preconfigured by the first terminal, there is at least one resource, and the resource period parameter includes a period duration of each of the at least one resource; the first terminal determines (S202) a start time unit of a resource period; and the first terminal sends (S203) communication data according to the start time unit of the resource period and the resource period parameter. Therefore, the start time unit of the resource period is random and more flexible, and can adapt to a randomness feature of a data packet generation time of the terminal, and further, communication data transmission performance can be improved, and a latency can be reduced.