Two-Level Resource Indication for 5G Control Channel Overhead Reduction
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Solution Overview
Problem
In next-generation communications systems like 5G, the dynamic change in access bandwidth leads to varying control information formats for resource allocation, resulting in increased control channel resource occupation and overheads due to longer indication information bits, which complicates resource scheduling and increases blind detection complexity.
Innovation Solution
A resource scheduling method that utilizes two-level resource indication information, where user equipment receives first and second indication information over separate control channels to determine transport blocks, reducing the need for blind detection and alleviating control channel resource shortages by sharing data channel resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the access bandwidth increases to support more data transmission, then the data transmission capacity is improved, but the length of indication information bits in control signaling increases, occupying more control channel resources and causing higher overheads
Solution Approach 1:
The patent segments the frequency domain resources into multiple bandwidth parts (BWPs), each with its own independent indication information. Instead of using one large indication information structure to cover the entire wide bandwidth, the system divides it into smaller BWP units (e.g., BWP1, BWP2, BWP3), each manageable with smaller indication bit fields. This segmentation allows the UE to be scheduled on multiple BWPs simultaneously while reducing the control signaling overhead for each individual BWP allocation.
2Adaptability or versatility
If the indication information bits are extended to cover larger bandwidths, then the resource allocation flexibility is improved, but the blind detection complexity increases
Solution Approach 1:
The patent divides the overall frequency domain into multiple BWPs, each with its own indication information structure. The UE performs blind detection separately for each BWP rather than for the entire wide bandwidth, significantly reducing the search space and detection complexity. Each BWP has its own DCI format and resource indication fields, allowing flexible resource allocation within each segment while keeping the per-BWP indication bit length manageable.
Solution Approach 2:
The patent introduces a new dimension of resource allocation by allowing simultaneous scheduling across multiple BWPs in the frequency domain. Instead of allocating resources sequentially or within a single large bandwidth, the system enables parallel resource allocation across multiple BWP dimensions, with each BWP independently indicated through its own DCI. This multi-dimensional approach increases overall resource allocation flexibility while maintaining manageable complexity per dimension.
3Adaptability or versatility
If multiple resource sets are used to allocate data channels, then the resource allocation flexibility is improved, but the control channel resource occupation increases
Solution Approach 1:
The patent segments the data channel resources across multiple BWPs, with each BWP having its own resource sets for PDSCH allocation. By dividing the overall resource space into BWP-level segments, the system achieves fine-grained resource allocation flexibility while efficiently utilizing control channel resources. Each BWP's resource allocation is independently managed, allowing the network to activate only the necessary BWPs and their associated resource sets based on traffic demands, thus avoiding unnecessary control channel occupation.
Data Source
AI summary
Embodiments provide resource scheduling method, user equipment, and an access network device. The method includes: receiving, by user equipment over a first control channel, first indication information corresponding to a transport block, where time-frequency resources occupied by a data channel in which the transport block is located include a first resource set and a second resource set, and the first indication information is used to indicate the first resource set and a time-frequency resource of a second control channel; receiving, by the user equipment, second indication information over the second control channel, where the second indication information is used to indicate the second resource set; and determining, by the user equipment, the transport block based on the first resource set and the second resource set. This can reduce control signaling overheads and improve flexibility of control channel resource scheduling.