CPRI Control Word Expansion via Superframe Segmentation
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Solution Overview
Problem
The limited number of control words in existing CPRI protocols cannot satisfy the increasing requirements for service types and data amounts in communication systems, leading to insufficient information transmission.
Innovation Solution
The method involves arranging control words in multiple superframes with different connotations, determining the number of superframes based on required control words, and using self-inspection signaling packets for data verification to ensure normal signaling states, thereby increasing the number of control words and enhancing protocol efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If control words are limited in number according to existing CPRI protocols, then the protocol structure remains simple and standardized, but the protocol cannot satisfy the increasing requirements for service types and data amounts
Solution Approach 1:
The patent segments the control word transmission by dividing it into multiple superframes. Each superframe contains a subset of control words, and the complete set of control words is distributed across multiple superframes. This segmentation allows the system to support more control words (improving adaptability) while maintaining the existing superframe structure (controlling complexity).
Solution Approach 2:
The patent introduces a time dimension to control word transmission by distributing control words across multiple superframes in the time domain. Instead of transmitting all control words in a single superframe, the system uses multiple superframes with different connotations at the same position, effectively increasing the capacity along the time dimension while preserving the spatial structure of individual superframes.
2Quantity of substance
If the number of control words is increased to satisfy user system requirements, then the protocol can support more service types and data amounts, but the existing superframe structure becomes insufficient
Solution Approach 1:
The patent employs periodic action by using multiple superframes with periodic transmission. Each superframe contains a portion of the control words, and the sequence of superframes is transmitted periodically. This allows the system to convey more control words (increasing quantity) while reusing the existing superframe template structure (avoiding structural complexity).
Solution Approach 2:
The patent applies preliminary action by pre-defining the distribution pattern of control words across multiple superframes. The system预先 determines which control words are placed in which superframes according to a predefined rule, allowing the receiver to efficiently extract and process control words without complex real-time processing, thus increasing control word capacity while maintaining processing simplicity.
3Loss of information
If multiple superframes with different connotations are used to transmit control words, then the number of transmittable control words increases, but the protocol processing complexity increases
Solution Approach 1:
The patent uses copying by creating multiple copies of the superframe structure, each containing a subset of control words. The receiver obtains complete information by collecting and combining data from multiple superframe copies. This approach ensures complete information transmission (reducing information loss) while using simple, repetitive superframe templates (minimizing processing complexity).
Data Source
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AI summary
Provided are a data transmission method and device, which relate to the field of communications. The method includes: when data is transmitted between an REC and one or more REs, arranging extended control words of the one or more REs in a plurality of superframes, wherein connotations of the extended control words at a same position in different superframes are different, and sending the plurality of superframes to an opposite end. By arranging extended control words of one or more REs in a plurality of superframes and different connotations of the extended control words at the same position in different superframes, the solution solves the problem that the requirements cannot be satisfied due to the limited number of control words in the protocol, and has the beneficial effect of increasing control words in the protocol.