Binding Redundancy Versions with System Frame Numbers
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Solution Overview
Problem
The prior art lacks a method to guarantee the retransmission performance of System Information (SI-x) messages by binding Redundancy Versions (RVs) with System Frame Number (SFN) and subframe numbers, leading to inefficiencies in message transmission.
Innovation Solution
A method and apparatus that bind RVs with SFN and subframe numbers, ensuring RV retransmissions by setting specific RV sequences for continuous subframes within a transmission window, particularly for SI-x messages with windows longer than or equal to 5 ms, using sequences like S RV (0), S RV (1), S RV (2), S RV (3) and adjusting RVs based on SFN and subframe numbering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If RVs are not bound with SFN and subframe numbers for SI-x messages, then the system maintains simplicity in the prior art, but the retransmission performance of SI-x messages cannot be guaranteed
Solution Approach 1:
The patent applies preliminary action by pre-defining RV binding rules with SFN and subframe numbers before transmission. The network side determines and applies the binding relationship in advance according to predetermined rules, ensuring that retransmission can be properly managed without complex real-time decisions.
Solution Approach 2:
The patent changes the parameter binding approach by explicitly binding RV values to SFN and subframe number parameters for SI-x messages. This parameter change enables the system to track and manage retransmissions effectively, improving reliability while maintaining manageable complexity through systematic parameter association.
2Duration of action of moving object
If the transmission window of SI-x message is longer than or equal to 5 ms, then more retransmission opportunities are available, but without RV binding the performance cannot be guaranteed
Solution Approach 1:
The patent applies preliminary action by pre-establishing the RV binding relationship with SFN and subframe numbers before the transmission window operations. This allows the system to take advantage of longer transmission windows (>=5ms) while ensuring reliable retransmission performance through predetermined RV assignment rules.
3Adaptability or versatility
If SIB1 uses RV sequence 0, 2, 3, 1 in 80 ms cycle, then the system maintains backward compatibility, but SI-x messages lack similar binding mechanisms
Solution Approach 1:
The patent applies universality by extending the RV binding mechanism to work for both SIB1 and SI-x messages. The same binding principle using SFN and subframe numbers is universally applied across different system information message types, ensuring consistent and reliable retransmission performance for all message types while maintaining adaptability.
Data Source
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AI summary
A method and apparatus for binding Redundancy Versions (RVs) with a System Frame Number (SFN) and sub frame numbers are disclosed. The method includes: choosing any 5 continuous subframes within a transmission window of a System Information (SI-x) message according to the subframe numbers of an SFN; and binding the SFN and subframe numbers of the 5 continuous subframes with RVs of the SI-x message. Because RVs are bound with an SFN and subframe numbers, when a transmission window of an SI-x message is longer than or equal to 5 ms, system frames and subframes are bound with RVs of the SI-x message, so that the RV retransmission of the SI-x message is guaranteed.