Coordinated Multipoint Transmission Biasing for CQI Control
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Solution Overview
Problem
Current CoMP systems lack effective control over the selection of transmission schemes, leading to suboptimal system performance as the UE independently decides on CQI values without considering system-wide benefits, resulting in potential overestimation of transmission rates and inefficient resource allocation.
Innovation Solution
Implementing a device with a controller module that transmits biasing parameters to influence the UE's CQI reporting, allowing the eNB to bias the selection of CQI values and optimize system performance by considering multiple coordinated transmission schemes and their resource allocations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE independently decides on CQI values without eNB control, then the UE can optimize its own transmission performance, but the system-wide resource allocation becomes inefficient and transmission rates may be overestimated
Solution Approach 1:
The eNB transmits biasing parameters to the UE that influence the CQI selection process. The UE reports CQI values back to the eNB, creating a feedback loop where the eNB can control and optimize system-wide resource allocation while maintaining UE autonomy in CQI determination
Solution Approach 2:
Biasing parameters act as an intermediary mechanism between the eNB and UE. These parameters indirectly guide the UE's CQI selection without directly dictating it, allowing the eNB to influence system-wide performance while preserving UE flexibility
2Productivity
If multiple coordinated transmission schemes are supported, then system performance can be optimized through scheme selection, but the complexity of resource allocation and CQI reporting increases
Solution Approach 1:
The CQI reporting process is segmented into multiple independent CQI values, each corresponding to a different coordinated transmission scheme. This allows the UE to report CQI for multiple schemes separately, enabling the eNB to select the optimal scheme without overwhelming complexity
Solution Approach 2:
Different biasing parameters are applied to different coordinated transmission schemes to influence CQI reporting. By adjusting these parameters, the eNB can control which schemes are preferred without increasing the fundamental complexity of the reporting mechanism
Data Source
AI summary
For coordinated multipoint transmission arrangements there is provided a device, including a controller module, configured to control a plurality of transmission points, each constituted by a set of at least one transmit antenna, to transmit data to another device in a coordinated transmission from at least a subset of the plurality of transmission points, wherein each subset with resources allocated thereto defines a respective coordinated transmission scheme, wherein the controller module is configured to transmit information on resources pertaining to multiple coordinated transmission schemes, and send at least one biasing parameter associated to at least one of the transmission schemes, to be applied for biasing a channel quality parameter. Another device includes a controller module, configured to report feedback responsive to such coordinated transmission, and the controller module is, among others, configured to apply the at least one biasing parameter to derived channel quality parameters.