Terminal–Base Station Latency Negotiation for Real-Time Data
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Solution Overview
Problem
Existing wireless communication protocols like EDCA do not provide absolute latency and jitter guarantees for real-time applications, making it difficult to ensure availability and control of applications such as network games and industrial robots.
Innovation Solution
A terminal apparatus and base station system that includes data processing units and wireless signal processing units to generate frames inquiring about latency and jitter requirements, allowing for negotiation and priority control of real-time applications through enhanced distributed channel access (EDCA) and hybrid coordination functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If EDCA priority control scheme is used, then relative priority among traffic categories is improved, but absolute latency and jitter guarantees for real-time applications cannot be achieved
Solution Approach 1:
The patent segments the channel access control into two independent parts: the existing EDCA priority control for general traffic categorization, and a new real-time application negotiation mechanism for latency-critical traffic. This segmentation allows each mechanism to operate independently, with the negotiation mechanism providing absolute latency guarantees without disrupting the overall EDCA framework, thus resolving the contradiction between reliability and complexity.
Solution Approach 2:
The patent introduces a negotiation frame as an intermediary mechanism between the terminal and base station. This negotiation frame carries latency requirements and enables mutual agreement on real-time application parameters. The intermediary negotiation process allows absolute latency guarantees to be established without requiring fundamental changes to the EDCA channel access structure, thereby maintaining complexity while improving reliability.
2Reliability
If real-time application negotiation is added to EDCA, then absolute latency requirements are satisfied, but channel access control complexity increases
Solution Approach 1:
The patent applies preliminary action by having the terminal send a negotiation frame before actual data transmission begins. This negotiation frame specifies latency requirements in advance, allowing the base station to pre-configure appropriate access parameters. By performing this negotiation and configuration before data flow starts, the system achieves reliable jitter control without adding operational complexity during active transmission.
Solution Approach 2:
The patent utilizes parameter changes by modifying existing EDCA parameters (such as transmission opportunity limits, priority levels, and buffer management) based on the negotiation results. Rather than creating entirely new control mechanisms, the system adjusts existing parameters dynamically according to the negotiated latency requirements, thereby achieving reliable jitter control while minimizing increases in operational complexity.
Data Source
AI summary
A terminal apparatus (20) according to an embodiment of the present disclosure includes a data processing unit (201) and a wireless signal processing unit (202). The data processing unit (201) generates a first frame including a requirement related to a latency during data communication and inquiring a base station (10) whether communication that satisfies the requirement is possible. The wireless signal processing unit (202) transmits the first frame.