Uplink Symbol Validation in SBFD Communication Scheduling
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Solution Overview
Problem
Existing communication systems face challenges in improving uplink coverage and throughput, particularly in subband full-duplex (SBFD) scenarios where determining valid symbols for uplink signal transmission is unclear, leading to inefficiencies.
Innovation Solution
A method and apparatus that determine first information indicating whether uplink signals can be sent in subband full-duplex (SBFD) or non-SBFD symbols, identifying invalid symbols where transmission is not allowed, ensuring uplink signals are sent only in valid symbols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If subband full-duplex (SBFD) is implemented to improve uplink coverage and throughput, then uplink performance is enhanced, but the complexity of determining valid symbols for transmission increases
Solution Approach 1:
The patent applies preliminary action by pre-determining and signaling the set of invalid symbols before the actual uplink transmission occurs. The network device sends first information indicating which symbols are invalid, allowing the terminal to prepare the valid symbol list in advance and avoid attempting transmission on invalid symbols, thereby reducing real-time decision complexity while maintaining high throughput
Solution Approach 2:
The patent introduces an intermediary mechanism through the 'first information' signaling from the network device to the terminal. This intermediary communication layer carries the invalid symbol indications, enabling the terminal to accurately identify valid transmission opportunities without complex local calculations, thus resolving the complexity-throughput tradeoff
2Productivity
If SBFD symbols are used to increase uplink capacity, then spectral efficiency improves, but interference between uplink and downlink subbands increases
Solution Approach 1:
The patent applies segmentation by dividing the frequency spectrum into distinct uplink subbands and downlink subbands within the same time symbol. The network device segments the available resources and signals which segments are invalid for uplink transmission, allowing the terminal to transmit only in designated uplink subbands, thereby maintaining spectral efficiency while controlling interference through frequency-domain separation
Solution Approach 2:
The patent implements local quality by assigning different transmission characteristics to different frequency segments (subbands) within the same time symbol. Certain subbands are marked as invalid for uplink transmission, creating localized restrictions that prevent interference in specific frequency regions while allowing uplink transmission in other subbands, thus maintaining overall system capacity
3Reliability
If the terminal determines invalid symbols based on first information, then transmission reliability improves, but the time required for symbol determination increases
Solution Approach 1:
The patent applies preliminary action by having the network device send the first information indicating invalid symbols before the terminal needs to determine valid transmission opportunities. This advance signaling allows the terminal to pre-calculate valid symbol sets and prepare transmission parameters in advance, eliminating time-consuming real-time determination while ensuring reliable transmission only on validated symbols
Data Source
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AI summary
The present application relates to a communication method and apparatus, and a device and a storage medium. The method comprises: determining first information, wherein the first information is used for indicating that an uplink (UL) signal is sent on at least one of a sub-band full duplex (SBFD) symbol and a non-SBFD symbol; and on the basis of the first information, determining an invalid symbol in a symbol where the UL signal is located, wherein the invalid symbol represents a symbol that does not allow the sending of the UL signal. A possible invalid symbol is determined by indicating whether data is allowed to be sent on at least one of an SBFD symbol and a non-SBFD symbol.