Flexible Uplink Resource Assignment in Mobile Networks
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Solution Overview
Problem
Current mobile communication networks using FDD duplex mode require fixedly defined duplex distances for downlink and uplink radio transmission resources, limiting flexibility and efficiency, especially during initial user equipment-cell association and data transmission.
Innovation Solution
The method involves the base station repeatedly transmitting downlink control signals using a specific frequency, allowing user equipment to detect this frequency and receive initial uplink radio transmission resource information, enabling flexible assignment of uplink resources without adhering to fixed duplex distances, and accommodating both legacy and non-legacy user equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fixed duplex distance allocation is used for downlink and uplink radio transmission resources, then reliability of legacy user equipment compatibility is maintained, but flexibility and efficiency in resource assignment are reduced
Solution Approach 1:
The patent applies local quality by providing different uplink resource assignment methods to different user equipment types. Non-legacy UE receive DCI format 1_0 with UL grant indicating flexible uplink resources, while legacy UE rely on fixed duplex distance rules. This localized differentiation resolves the contradiction by maintaining compatibility for legacy UE while enabling flexibility for non-legacy UE.
Solution Approach 2:
The patent segments the user equipment population into legacy and non-legacy categories, allowing different resource allocation mechanisms to apply to each segment. This segmentation enables the system to maintain backward compatibility while simultaneously implementing flexible resource assignment, resolving the contradiction between reliability and adaptability.
2Device complexity
If fixed duplex distance is enforced for all user equipment, then simplicity of resource allocation is maintained, but efficiency in transmitting payload and control data is reduced
Solution Approach 1:
The patent introduces dynamic resource allocation through DCI format 1_0 with UL grant for non-legacy UE, allowing the base station to flexibly assign uplink resources based on current network conditions and traffic demands. This dynamic approach improves data transmission efficiency while maintaining simple fixed duplex distance allocation for legacy UE, resolving the contradiction between simplicity and efficiency.
3Adaptability or versatility
If flexible uplink resource assignment without fixed duplex distance is implemented, then efficiency and flexibility in data transmission are improved, but complexity of accommodating both legacy and non-legacy user equipment increases
Solution Approach 1:
The patent uses DCI format 1_0 with UL grant as an intermediary mechanism to convey flexible uplink resource assignments to non-legacy UE. This intermediary allows the system to implement flexible resource assignment while maintaining simple fixed duplex distance rules for legacy UE, thereby improving adaptability without proportionally increasing complexity.
Data Source
AI summary
A method for transmitting payload and/or control data in downlink and/or uplink directions between a base station entity and a user equipment of a mobile communication network includes: in a first step, the user equipment detects the at least one downlink control signal and the specific downlink radio transmission frequency as an initial downlink radio transmission resource; and in a second step, subsequent to the first step, the user equipment receives downlink control information from the base station entity. The content or value of the downlink control information indicates or defines an initial uplink radio transmission resource.