Wireless Node Buffer Status Reporting With Dynamic LCG Fields
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Solution Overview
Problem
The challenge in wireless communication systems is efficiently managing buffer status reports (BSRs) to overcome latency and optimize the use of limited radio resources, particularly in scenarios with increased user equipment and data transmission demands.
Innovation Solution
A method and apparatus for transmitting BSRs that involve receiving logical channel group (LCG) configuration information, generating a BSR with a configurable LCG field based on the highest LCG identity values, and transmitting this report to the network, with the LCG field length adjusted accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the LCG field length is fixed to support the maximum possible number of LCG identities, then all LCG configurations can be accommodated, but the BSR message size increases unnecessarily when fewer LCG identities are used
Solution Approach 1:
The BSR message structure dynamically adapts its LCG field length based on the actual number of LCG identities configured by the network. The MAC entity determines the appropriate LCG field size according to the highest LCG identity value in the configuration, allowing the message to be compact when fewer LCGs are used while still supporting the full range when needed.
2Loss of information
If the BSR message includes detailed buffer status information for all configured LCGs, then complete buffer status reporting is achieved, but the transmission time and processing delay increase
Solution Approach 1:
The patent extracts and reports only the essential buffer status information needed for efficient scheduling. By using a compact LCG field that encodes buffer status for multiple logical channels efficiently, the system transmits complete buffer status information in a condensed format, reducing the time required for BSR transmission and processing while maintaining information completeness.
3Adaptability or versatility
If the LCG field is configured to support a large number of LCG identities, then the system can accommodate more logical channels and user equipment, but the radio resource efficiency decreases due to larger control message overhead
Solution Approach 1:
The system changes the parameter of LCG field length based on the actual configuration requirements. Instead of using a fixed maximum length, the LCG field is configured with the minimum necessary length to support the highest LCG identity value in use, thereby optimizing radio resource efficiency while maintaining the ability to accommodate the required number of logical channels and user equipment.
Data Source
AI summary
The present invention relates to a method of transmitting a buffer status report (BSR) by a wireless node in a wireless communication system. In particular, the method includes the steps of: receiving first logical channel group (LCG) configuration information including identities of LCGs from a network; generating the BSR including a LCG field; and transmitting the BSR to the network, wherein a length of the LCG field is configured according to a highest value of the identities of LCGs.