Uplink Resource Configuration via Carrier Segmentation
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Solution Overview
Problem
In conventional FDD flexible duplex systems, uplink resources are limited due to high overheads in control-and-feedback-related information transmission, as all user equipment feedback is borne by a single uplink carrier, leading to resource constraints and inefficiencies.
Innovation Solution
The method involves configuring a first uplink resource with continuous uplink sub-frames from multiple physical carriers, forming a virtual Pcell that increases the number of uplink transmission resources and allows for flexible allocation, thereby reducing the burden on individual carriers and ensuring timely feedback transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If all user equipment feedback is transmitted through a single uplink carrier (conventional Pcell configuration), then control-and-feedback information can be centralized, but uplink resources become limited and feedback overhead becomes extremely high
Solution Approach 1:
The patent segments the uplink feedback transmission by introducing multiple uplink carriers (Pcell and Pscell) to share the control-and-feedback information transmission task. Instead of concentrating all feedback on a single uplink carrier, the system divides the feedback load across multiple carriers, thereby reducing the feedback overhead on each individual carrier and increasing overall uplink resource capacity.
2Adaptability or versatility
If flexible allocation of uplink and downlink resources is implemented in FDD system, then resource utilization improves, but uplink feedback overhead increases due to more downlink sub-frames
Solution Approach 1:
The patent applies segmentation by introducing a secondary uplink carrier (Pscell) to share the feedback transmission burden. As more downlink carriers are added to increase resource allocation flexibility, the feedback overhead is segmented across multiple uplink carriers, preventing any single uplink carrier from becoming overloaded.
Solution Approach 2:
The patent makes multiple uplink carriers universally capable of handling control-and-feedback information. Both the Pcell and Pscell are configured to transmit feedback messages, making the uplink feedback transmission system multi-functional and distributed, thereby reducing the overhead on individual carriers while maintaining flexible resource allocation.
3Quantity of substance
If multiple carriers are used for uplink transmission, then uplink resource capacity increases, but timing relationship requirements become more complex
Solution Approach 1:
The patent merges the timing relationship management of multiple uplink carriers by establishing a unified reference point (SFN and subframe number of the Pcell). All uplink carriers (Pcell and Pscell) use the same timing relationship rules relative to this common reference, simplifying the overall timing management despite using multiple carriers for uplink transmission.
Data Source
AI summary
Embodiments of the present application disclose an uplink resource configuration method, an uplink transmission method, an uplink resource configuration apparatus, and an uplink transmission apparatus. The uplink resource configuration method comprises: determining a first uplink resource configuration associated with a first carrier that performs at least partial uplink transmission with at least one user equipment, wherein the first carrier comprises: respective some uplink sub-frames of at least two physical carriers, and the first carrier is continuous in time; and sending first configuration information associated with the first uplink resource configuration. By means of the methods and the apparatuses in the embodiments of the present application, a quantity of carriers used for uplink transmission is increased, so that a problem that an uplink transmission resource is limited can be resolved; and in addition, the carriers used for uplink transmission are formed by uplink sub-frames of different physical carriers that are continuous in time, and therefore a timing relationship needed by an uplink carrier can be satisfied, and then a system can run normally.