DRNC Cell Capability Reporting for Downlink Modulation
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Solution Overview
Problem
Current radio communication systems lack a method for accurately determining whether a cell under the jurisdiction of a drift radio network controller (DRNC) supports downlink high-level modulation, such as 64QAM, which is essential for ensuring backward compatibility and optimal user experience in high-speed data transmission.
Innovation Solution
A method and apparatus where the DRNC reports the supporting capability of cells for downlink high-level modulation to the serving radio network controller (SRNC) through signaling messages, such as radio link setup or addition responses, indicating support or nonsupport using bit expressions within cell capability containers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If downlink high-level modulation (64QAM) is introduced to improve system throughput and user experience, then data transmission rate is improved, but device compatibility deteriorates because old node B devices cannot support the new technology
Solution Approach 1:
The patent applies preliminary action by having the DRNC pre-acquire and store capability information of associative cells (indicating whether they support 64QAM) before actual data transmission. This allows the SRNC to query this information in advance through the Iur interface, enabling informed decisions about whether to use high-level modulation before establishing connections, thus resolving the conflict between improving throughput and maintaining compatibility.
2Measurement precision
If the DRNC reports cell capability information to the SRNC to enable accurate determination of modulation support, then decision accuracy is improved, but signaling complexity increases due to additional information exchange requirements
Solution Approach 1:
The patent applies universality by integrating the cell capability reporting function into existing Iur interface signaling messages. The capability information is carried within standard signaling structures (such as RNSAP messages), allowing the same interface to serve both its original coordination functions and the new capability reporting function, thereby improving decision accuracy without significantly increasing overall signaling complexity.
3Stability of the object's composition
If all node B devices are upgraded to support 64QAM to ensure consistent technology support, then technology support uniformity is improved, but system cost increases due to replacement requirements
Solution Approach 1:
The patent applies local quality by enabling selective application of 64QAM modulation based on the specific capability of each associative cell. Instead of requiring uniform upgrades across all node B devices, the system can locally apply high-level modulation only to cells that support it, while maintaining backward compatibility with cells that do not support the new technology, thus achieving technology support uniformity where applicable without incurring unnecessary system costs.
Data Source
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AI summary
The present invention provides a method and an apparatus for reporting the supporting capability of a cell for downlink high-level modulation, which are used for a drift radio network controller (DRNC) reporting whether an associative cell supports downlink high-level modulation or not, in which, the method includes the following steps: after receiving a request message from a serving radio network controller (SRNC), the DRNC reports the supporting capability information of the associative cell for downlink high-level modulation through signaling to the SRNC. Accordingly, the method and the apparatus for the DRNC reporting the supporting capability of a cell under the jurisdiction of the DRNC for downlink high-level modulation provided in the present invention enable the SRNC to acquire information to participate in determining whether to use the downlink high-level modulation for a user device by the DRNC reporting to the SRNC whether the cell under the jurisdiction of the DRNC supports downlink high-level modulation.