Wireless Frequency Allocation Using RBGs for Limited-Bandwidth UEs
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Solution Overview
Problem
Existing wireless communication systems face challenges in effectively allocating frequency resources, particularly for terminals with limited bandwidth, and managing overlapping channels on a time axis.
Innovation Solution
The proposed solution involves a method for allocating frequency resources through a user equipment (UE) or base station, which includes performing access and connection procedures with primary and secondary cells, receiving/transmitting downlink control information (DCI) to indicate resources across multiple cells, and managing resource block groups (RBGs) to handle limited bandwidth and overlapping channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If frequency resources are allocated to terminals with limited bandwidth, then resource allocation efficiency is improved, but the number of available resource blocks decreases
Solution Approach 1:
The patent divides the frequency resource into multiple resource block groups (RBGs) and allocates them to different terminals. By segmenting the total bandwidth into smaller manageable units (RBGs), the system can efficiently allocate resources to terminals with limited bandwidth while maintaining overall resource utilization. The RBG size can be dynamically adjusted based on terminal capabilities and channel conditions.
Solution Approach 2:
The patent implements dynamic resource allocation where the number of resource blocks assigned to each terminal is adjusted based on real-time channel conditions, terminal bandwidth capabilities, and traffic demands. The base station can dynamically modify the RBG size and allocation pattern to optimize resource utilization while accommodating terminals with varying bandwidth limitations.
2Productivity
If multiple channels are allocated on the time axis, then communication capacity is improved, but channel overlap and interference increase
Solution Approach 1:
The patent resolves channel overlap by introducing frequency domain separation. When multiple channels need to be transmitted on the time axis, the system allocates them to different frequency resources (different RBGs or resource blocks) to avoid overlap. This dimensional separation in the frequency domain eliminates interference while maintaining high communication capacity through parallel channel transmission.
3Loss of information
If resource allocation information is indicated using limited bandwidth, then signaling overhead is reduced, but resource allocation precision decreases
Solution Approach 1:
The patent uses compact resource allocation signaling that indicates only the necessary portion of resource allocation information. Instead of signaling the complete resource map, the system uses concise indicators such as RBG size indicators, start RBG indices, and length indicators that together define the allocated resources. This partial signaling approach reduces overhead while maintaining sufficient precision for accurate resource allocation.
Solution Approach 2:
The patent employs parameter-based resource allocation where the base station signals key parameters (such as RBG size, starting position, and allocation length) that define the resource blocks to be used. By changing and optimizing these parameters based on terminal capabilities and channel conditions, the system achieves precise resource allocation with minimal signaling overhead. The RBG size itself can be dynamically adjusted as a parameter to balance precision and overhead.
Data Source
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AI summary
The present disclosure relates to allocation of a frequency resource for channel transmission in a wireless communication system, and a method performed by a terminal may include transmitting a random access preamble to a base station, receiving a random access response message from the base station, transmitting a connection request message to the base station, identifying that a channel scheduled by the base station has a larger bandwidth than a threshold, and in response to the channel having the larger bandwidth than the threshold, performing at least one operation related to failure of contention resolution.