DCI Overhead Reduction via Common Rate Matching Resources
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Solution Overview
Problem
In next-generation wireless communications systems, such as 5G, the overheads of Downlink Control Information (DCI) increase significantly due to the need to indicate rate matching resources for multiple codewords in CoMP scenarios, leading to redundant information and inefficiencies in resource configuration.
Innovation Solution
A method is introduced to configure a resource configuration that distinguishes between a common rate matching resource set for all codewords and dedicated resource sets for specific codewords, reducing the need for repeated indication of rate matching resources by using a more efficient signaling mechanism within the DCI.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate rate matching resources are indicated for each codeword in CoMP scenarios, then the terminal device can accurately receive downlink data from multiple base stations, but the DCI overhead increases significantly
Solution Approach 1:
The patent merges the rate matching resource indication for multiple codewords into a unified structure. Instead of separately indicating rate matching resources for each codeword, the system uses a single indication that applies to all codewords, thereby reducing DCI overhead while maintaining the ability to handle CoMP scenarios effectively
Solution Approach 2:
The patent creates a universal rate matching resource indication mechanism that serves multiple codewords simultaneously. The indicated rate matching resources apply universally across all codewords in the CoMP scenario, eliminating the need for redundant separate indications and reducing overall signaling overhead
2Adaptability or versatility
If rate matching resources are configured for multiple codewords, then the system supports coordinated multipoint transmission, but redundant information is generated in DCI
Solution Approach 1:
The patent extracts the common rate matching resource information from individual codeword-specific indications. By identifying and separating the redundant common information, the system can indicate it once for all codewords rather than repeating it for each codeword, thereby eliminating redundancy while maintaining CoMP functionality
Solution Approach 2:
The patent combines the indication of rate matching resources that are common across multiple codewords into a single unified indication. This merging eliminates redundant information in DCI while preserving the necessary rate matching configuration for CoMP transmission
Data Source
Figure 1~2
Figure 3A~3B
Figure 3C
AI summary
A resource configuration method and a communications apparatus are disclosed. The method includes: After determining a first resource set that does not carry information bits included in any one of N codewords and a second resource set that does not carry information bits included in a part of the N codewords, a network device sends, to a terminal device, first information used to indicate configuration information of the first resource set and second information used to indicate configuration information of the second resource set. The terminal device receives the first information and the second information, and determines the first resource set and the second resource set. In the foregoing technical solution, a rate matching resource (the first resource set) common to the N codewords and a rate matching resource (the second resource set) dedicated to the part of the N codewords are configured. In this way, repetition of indicating a same rate matching resource for the N codewords can be reduced. Therefore, a quantity of bits of an indication field used to indicate a rate matching resource can be reduced, thereby reducing DCI overheads.