Cyclic Sequence Rate Signaling for Faster Link Establishment
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Solution Overview
Problem
Existing methods for transmission rate negotiation between communication apparatuses are inefficient and often take a long time or fail to establish a successful link due to high randomness and the need for multiple interaction procedures.
Innovation Solution
A method where a first apparatus sends a cyclic sequence indicating its supported transmission rates, allowing a second apparatus to determine the transmission rate without additional signaling, enabling faster and more accurate negotiation by intercepting symbols from any position in the sequence, and selecting a common rate based on supported rates of both apparatuses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If traditional transmission rate negotiation methods are used with multiple interaction procedures, then the negotiation can be performed, but the negotiation speed is slow and the link establishment time is long
Solution Approach 1:
The patent extracts the transmission rate indication information from a cyclic sequence and embeds it directly into the physical layer signaling. By taking out the negotiation information from separate interaction procedures and incorporating it into the cyclic sequence structure, the patent eliminates multiple interaction steps while preserving the negotiation functionality, thereby significantly reducing negotiation time and accelerating link establishment.
Solution Approach 2:
The patent performs preliminary action by pre-defining the correspondence between cyclic sequence patterns and transmission rates before actual communication occurs. The cyclic sequence is designed in advance to encode transmission rate information, so that when the sequence is transmitted, the receiving end can immediately determine the transmission rate without requiring iterative negotiation, thus reducing link establishment time.
2Reliability
If traditional negotiation methods with multiple interactions are used, then transmission rate can be negotiated, but the process has high randomness and low success rate
Solution Approach 1:
The patent implements feedback by having the receiving end detect the cyclic sequence, determine the indicated transmission rate, and use this information to adjust its own transmission rate selection. This feedback mechanism ensures that both ends converge on a common transmission rate reliably, eliminating the high randomness of traditional methods while maintaining manageable complexity through automated rate matching.
Solution Approach 2:
The patent changes the parameter representation by encoding transmission rate information directly into the cyclic sequence structure rather than using separate negotiation messages. This parameter transformation allows the receiving end to directly extract transmission rate information from the physical layer signal, significantly improving negotiation reliability and reducing the complexity of higher-layer negotiation protocols.
3Measurement precision
If cyclic sequence is used to indicate transmission rate, then negotiation accuracy is improved, but synchronization requirements increase
Solution Approach 1:
The patent applies periodic action by using a cyclic sequence that repeats the same pattern. This periodic structure allows the receiving end to detect the sequence at any phase and still accurately determine the transmission rate by identifying the repeating pattern, thereby maintaining high determination accuracy while reducing synchronization complexity through inherent sequence periodicity.
Solution Approach 2:
The patent uses asymmetry in the cyclic sequence design where specific asymmetric patterns are assigned to different transmission rates. This asymmetric encoding ensures that each transmission rate corresponds to a unique sequence pattern, enabling accurate rate determination while the cyclic repetition of these asymmetric patterns simplifies synchronization by providing clear identification markers.
4Loss of information
If additional signaling is used for transmission rate indication, then the information can be transmitted clearly, but the signaling overhead increases and efficiency decreases
Solution Approach 1:
The patent merges the transmission rate indication function with the existing cyclic sequence structure used for other purposes. By combining multiple functions (synchronization, rate indication, and data transmission) into a single cyclic sequence, the patent eliminates the need for separate signaling messages, reducing signaling overhead and energy consumption while maintaining clear transmission rate information through the integrated structure.
Solution Approach 2:
The patent implements universality by designing the cyclic sequence to serve multiple functions simultaneously: it provides synchronization information, encodes transmission rate data, and carries other control information. This multi-functional approach eliminates the need for dedicated signaling for each function, reducing overall signaling overhead and improving communication efficiency without sacrificing information clarity.
Data Source
AI summary
Embodiments of this application provide a transmission rate negotiation method, a communication apparatus, and a communication system. In this solution, a first apparatus indicates, based on a cyclic sequence, a first transmission rate supported by the first apparatus, and a second apparatus that can accurately determine the first transmission rate, to help improve accuracy of transmission rate negotiation. In addition, after receiving a first cyclic sequence, the second apparatus does not need to send a response to the first apparatus, but performs a subsequent operation, for example, a determination of the first transmission rate based on the first cyclic sequence. Because fewer interaction procedures are performed between the two parties, the transmission rate negotiation is accelerated.