Base Station MBS Control Information Segmentation
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently providing multicast and broadcast services (MBS) due to limitations in managing MBS control information transmission, particularly in single-cell and multi-cell transmission modes, which affect signal reliability and service switching times.
Innovation Solution
The method involves transmitting MBS control information on different logical channels, such as primary and secondary multicast/broadcast control information blocks (P-MCIB and S-MCIB), using single-cell and multi-cell transmission modes, and multiplexing these channels to optimize resource allocation and schedule information, allowing for dynamic parameter updates and reduced service switching times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If MBS control information is transmitted on a single logical channel, then the transmission structure is simple, but the signal reliability and service switching performance deteriorate
Solution Approach 1:
The patent segments MBS control information into two distinct types: cell-specific MBS control information transmitted on a first logical channel, and non-cell-specific MBS control information transmitted on a second logical channel. This segmentation allows different types of control information to be transmitted through optimized paths, improving overall signal reliability without excessive complexity increase.
Solution Approach 2:
The patent introduces a new dimension to the transmission structure by adding a second logical channel for non-cell-specific MBS control information. This dimensional expansion enables parallel transmission of different control information types, enhancing reliability through diversity while maintaining manageable system complexity.
2Device complexity
If MBS control information is transmitted at low frequency, then the system complexity is reduced, but the service switching time increases
Solution Approach 1:
The patent implements dynamic transmission frequencies for different MBS control information types. Cell-specific MBS control information is transmitted at a first frequency while non-cell-specific MBS control information is transmitted at a second frequency. This dynamic approach allows the system to optimize service switching times without excessive complexity by adapting transmission rates to the specific needs of different control information types.
Solution Approach 2:
The patent changes the transmission parameter (frequency) based on the type of MBS control information. By transmitting different control information at different frequencies, the system can rapidly update service switching parameters without increasing overall system complexity, as each channel operates independently with its own optimized frequency.
3Ease of operation
If single-cell transmission mode is used, then the base station operation is simplified, but the MBS signal coverage and reliability deteriorate
Solution Approach 1:
The patent segments the transmission approach by dedicating the first logical channel to cell-specific MBS control information transmitted via single-cell mode, while the second logical channel carries non-cell-specific information that can be received from multiple cells. This segmentation maintains operational simplicity for cell-specific control while improving overall MBS signal reliability through multi-cell reception capability for non-cell-specific information.
4Reliability
If multi-cell transmission mode is used, then the MBS signal reliability is improved, but the coordination complexity between base stations increases
Solution Approach 1:
The patent segments coordination requirements by separating cell-specific control information (handled independently by each base station on the first logical channel) from non-cell-specific MBS control information (transmitted on the second logical channel and receivable from multiple cells). This segmentation reduces coordination complexity compared to full multi-cell transmission, as only the second channel requires inter-base station coordination while maintaining improved MBS signal reliability through multi-cell reception capability.
Data Source
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AI summary
A method for a base station to provide a multicast and/or broadcast service (MBS) in a communication system. The method includes: transmitting system information on a system control information block (SCIB); transmitting MBS control information that is changed with relatively high frequency on a secondary multicast/broadcast control information block (S-MCIB); and transmitting MBS content data based on the MBS control information.