Variable Subband Control Information for Wireless Base Stations
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Solution Overview
Problem
Current wireless communication systems face challenges in reducing the overhead associated with downlink control information (DCI) size, which constrains system performance in terms of the number of user equipment (UEs) that can be served, UE power consumption, and latency due to large DCI payloads.
Innovation Solution
The proposed solution involves varying subband sizes for control information within a control band/channel to efficiently identify resources for a data band/channel, allowing for reduced DCI payload and improved downlink control efficiency by assigning and utilizing different subband sizes for control and data channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional downlink control information is used with fixed subband sizes, then resource allocation can be simplified, but control overhead increases and system capacity is constrained
Solution Approach 1:
The patent applies dynamics by making subband sizes variable rather than fixed. The base station dynamically adjusts control subband and data subband sizes based on channel conditions, traffic requirements, and UE capabilities. This allows the system to adapt control overhead to actual needs, reducing unnecessary overhead while maintaining system capacity.
Solution Approach 2:
The patent changes the parameter of subband size from a fixed value to a variable parameter that can be adjusted according to different scenarios. By modifying subband size parameters, the system optimizes the balance between control overhead and system capacity, allowing more UEs to be served efficiently.
2Measurement precision
If larger DCI payloads are transmitted to provide comprehensive control information, then resource allocation precision is improved, but UE power consumption increases
Solution Approach 1:
The patent segments control information into different subbands (control subbands and data subbands) with different sizes. By dividing the control information transmission into segmented subbands, the system can provide precise resource allocation where needed while reducing overall DCI payload size, thereby lowering UE power consumption for processing control information.
3Productivity
If more control resources are allocated to serve more UEs, then system capacity increases, but latency increases due to larger DCI payloads
Solution Approach 1:
The patent uses dynamic subband size adjustment to optimize the trade-off between serving more UEs and minimizing latency. By dynamically configuring appropriate subband sizes based on current system load and UE distribution, the base station can efficiently allocate control resources to multiple UEs without unnecessarily enlarging DCI payloads, thus reducing processing latency.
Data Source
AI summary
An apparatus is configured to be employed within a base station. The apparatus comprises baseband circuitry which includes a radio frequency (RF) interface and one or more processors. The one or more processors are configured to obtain channel information and data information for a user equipment (UE) device, determine control information for the UE device based on the obtained channel information and data information, generate a channel format for the determined control information and having varied subband sizes, and provide the channel format to the RF interface for a downlink transmission to the UE device.is configured to be employed within a base station.