Uplink Feedback Indication via Resource Set Division
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Solution Overview
Problem
In wireless communication systems, particularly in NR (New Radio), the inconsistency in recognizing uplink feedback information between base stations and user equipment can lead to issues due to partial overlap of uplink data and control information in the time domain, making it difficult to determine the number of pieces of uplink feedback information to be transmitted.
Innovation Solution
A method is introduced where time/frequency resources are divided into sets for uplink control information, and current count values are transmitted to user equipment to ensure that the number of uplink feedback information pieces matches the number of downlink data pieces, using a mechanism similar to DAI (Downlink Assignment Indicator) in LTE, but adapted for NR's dynamic resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If uplink data and uplink control information are transmitted on overlapping time/frequency resources, then resource utilization is improved, but inconsistency in recognizing the number of uplink feedback information pieces occurs between base station and user equipment
Solution Approach 1:
The base station performs preliminary actions by dividing time/frequency resources into sets before transmission, and sends indication information to the user equipment in advance. This allows the user equipment to understand the resource division and correctly determine the number of uplink feedback information pieces before actual transmission occurs, preventing inconsistency issues.
Solution Approach 2:
Indication information acts as an intermediary between the base station and user equipment. It conveys the resource division rules and current count values from the base station to the user equipment, enabling both parties to reach a consistent understanding of the number of uplink feedback information pieces without direct negotiation or complex signaling.
2Adaptability or versatility
If dynamic resource allocation is used in NR, then adaptability is improved, but determination of the number of uplink feedback information pieces becomes difficult
Solution Approach 1:
Time/frequency resources are segmented into multiple sets, with each set potentially containing multiple time/frequency resources. This segmentation allows the base station to manage dynamic resource allocation in a structured manner and convey the necessary information to user equipment through indication information, making the determination of feedback information count feasible despite dynamic allocation.
Solution Approach 2:
The system uses parameter changes in the indication information (such as current count values and resource set indicators) to dynamically convey the number of uplink feedback information pieces. As resources are dynamically allocated, the indication information parameters are updated accordingly, allowing user equipment to determine the correct feedback count without complex calculations.
Data Source
AI summary
A method of indicating uplink feedback information includes: dividing time/frequency resources, configured to facilitate user equipment transmitting uplink control information, into at least one time/frequency resource set for the uplink control information; counting, based on the set to which time/frequency resources for transmitting uplink feedback information corresponding to downlink data for the user equipment belong, pieces of the uplink feedback information in a preset manner; and transmitting one or more current count values to the user equipment in transmitting downlink scheduling information or uplink scheduling information; wherein the dividing the time/frequency resources, configured to facilitate the user equipment transmitting the uplink control information, into the at least one time/frequency resource set for the uplink control information includes: performing the dividing according to a time unit to which the time/frequency resources for the uplink control information belong in the time domain, wherein the time unit belongs to a time slot.