Adaptive Multiple-Access Manner Selection for Coverage and Throughput
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Solution Overview
Problem
Conventional communication systems using a single multiple-access manner cannot meet the diverse requirements of different user equipment, such as strong coverage for underground environments and high-rate transmission for certain applications, within the same network.
Innovation Solution
A communication method and system that allow user equipment to select from multiple multiple-access manners (OFDMA, OFDMA+CDMA, OFDMA+IDMA) based on predetermined conditions, with the base station adapting its transmission accordingly to match the selected multiple-access manner, enabling flexible resource allocation and interference management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single multiple-access manner (e.g., OFDMA) is used throughout the communication system, then strong coverage is achieved for underground environments, but high-rate transmission requirements cannot be met
Solution Approach 1:
The system dynamically selects different multiple-access manners based on service requirements and channel conditions. User equipment can switch between OFDMA, SC-FDMA, and other access modes depending on whether coverage enhancement or high-rate transmission is needed, making the system adaptable rather than static
Solution Approach 2:
The patent changes the parameter of multiple-access manner from a fixed single mode to a selectable set of modes. By varying the access mode parameter according to different service types and channel conditions, the system optimizes performance for both coverage and throughput scenarios
2Object-affected harmful factors
If a single multiple-access manner is used throughout the communication system, then interference immunity is maintained, but diverse service requirements cannot be satisfied
Solution Approach 1:
The communication system is segmented into different access mode domains. Different time-frequency resources are allocated to different multiple-access manners, allowing the system to maintain interference immunity within each domain while providing versatility across the entire system through selective access mode deployment
Solution Approach 2:
The base station and user equipment are designed to support multiple multiple-access manners universally. The system can function in OFDMA mode, SC-FDMA mode, or hybrid modes depending on requirements, making the communication infrastructure multi-functional rather than single-purpose
3Adaptability or versatility
If multiple multiple-access manners are provided for user equipment selection, then diverse service requirements can be met, but system complexity increases
Solution Approach 1:
User equipment autonomously selects the appropriate multiple-access manner based on predetermined conditions such as service type, channel quality, and buffer status. This self-service selection mechanism reduces the signaling overhead and control complexity that would otherwise be required for centralized management of multiple access modes
Solution Approach 2:
The system pre-configures multiple multiple-access manners and their corresponding parameters before actual communication occurs. User equipment is provided with a set of available access modes and selection criteria in advance, enabling rapid adaptation without real-time complex computations or extensive signaling exchanges
Data Source
AI summary
A communication method, a base station, user equipment, and a system are provided. The method includes: receiving uplink data that is sent by the user equipment in a specified multiple-access manner on a time-frequency resource corresponding to the specified multiple-access manner; and sending downlink data to the user equipment in a corresponding multiple-access manner on a time-frequency resource corresponding to the corresponding multiple-access manner, where the corresponding multiple-access manner is a multiple-access manner that is obtained by searching a at least two multiple-access manners according to a prestored correspondence and that is associated with the specified multiple-access manner. In this way, a problem that because one multiple-access manner is used in a same communications system, requirements of different user equipments cannot be met at the same time is resolved.