Group-Controlled Channel Measurement Reporting for Wireless Networks
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Solution Overview
Problem
Existing wireless communications networks face challenges in efficiently supporting a diverse range of devices with varying data traffic profiles and requirements, particularly in terms of latency, reliability, and cost, necessitating improved methods for channel measurement reporting to facilitate efficient link adaptation.
Innovation Solution
A method involving the reception of reference signals and downlink control information to determine communication resources for transmitting channel measurement reports, allowing multiple devices to report channel state information efficiently using orthogonal resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If individual DCI messages are sent to each communications device for channel measurement reporting, then each device can be individually controlled, but signalling overhead and network complexity increase significantly
Solution Approach 1:
The patent combines multiple individual DCI messages into a single group common DCI message that addresses multiple communications devices simultaneously. This single message contains resource allocation information for a group of devices, reducing the number of separate signalling transmissions required while maintaining individual resource allocation capabilities within the group context.
2Measurement precision
If separate resource allocation is performed for each device, then resource allocation accuracy is maximized, but resource overhead and processing complexity increase
Solution Approach 1:
The patent segments the group of communications devices into sub-groups or maintains individual device identities within the group context, allowing resource allocation to be performed at a group level while preserving the ability to allocate specific resources to specific devices when needed. This segmentation enables efficient bulk allocation while maintaining precision for individual devices that require it.
3Reliability
If channel measurement reports are transmitted frequently, then link adaptation accuracy is improved, but network overhead and power consumption increase
Solution Approach 1:
The patent implements periodic channel measurement reporting where communications devices transmit channel state information at predetermined intervals rather than continuously or on every scheduling opportunity. This periodic action maintains sufficient link adaptation accuracy while significantly reducing the frequency of transmissions, thereby lowering power consumption and network overhead.
Data Source
AI summary
A method of operating a communications device, the method comprising: receiving reference signals transmitted by the infrastructure equipment on a wireless access interface, receiving downlink control information (DCI) transmitted by the infrastructure equipment to the communications device and each of one or more other communications devices which together form a group of communications devices, the DCI indicating whether each of the respective communications devices of the group is to transmit a channel measurement report, and in response to receiving the DCI, determining, based on the DCI, communications resources for transmitting the channel measurement report, generating a channel measurement report based on the received reference signals, and transmitting the channel measurement report using the determined communications resources.