Piggyback DCI Resource Allocation in PDSCH
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently allocating resources for piggyback downlink control information (DCI) in high-band frequencies, leading to increased power consumption and monitoring overhead due to frequent DCI transmissions and potential issues in receiving and processing piggybacked DCI by user equipment (UEs).
Innovation Solution
The method involves determining flexible resource allocations for piggyback DCI within a physical downlink shared channel (PDSCH) transmission, where the base station allocates specific time and frequency domain resources for DCI, indicated in a scheduling DCI communication, allowing UEs to process the DCI based on these allocations, thereby reducing monitoring overhead and improving reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If DCI is transmitted frequently in high-band frequencies, then communication reliability is improved, but power consumption and monitoring overhead increase
Solution Approach 1:
The patent implements periodic DCI transmissions with configurable intervals, allowing the system to maintain reliable communication while reducing the frequency of transmissions. The base station can adjust the periodicity based on channel conditions and traffic requirements, balancing reliability with power consumption.
Solution Approach 2:
The patent uses scheduling DCI to pre-allocate resources and provide advance notification to UEs about upcoming data transmissions. This preliminary action allows UEs to enter low-power states between scheduled transmissions, reducing overall power consumption while maintaining reliable communication at predetermined intervals.
2Reliability
If DCI is transmitted frequently in high-band frequencies, then communication reliability is improved, but monitoring overhead increases
Solution Approach 1:
By establishing periodic transmission patterns with configurable intervals, the system reduces the number of monitoring occasions required. UEs can predict when DCI will be transmitted based on the periodic schedule, reducing continuous monitoring overhead while maintaining reliability through regular scheduled transmissions.
Solution Approach 2:
The scheduling DCI provides preliminary information about resource allocations and transmission parameters in advance. This allows UEs to prepare reception without continuous monitoring, reducing monitoring overhead while ensuring reliable reception through pre-configured monitoring at scheduled times.
3Reliability
If separate resource allocation for DCI is provided, then DCI reception reliability is improved, but resource overhead increases
Solution Approach 1:
The patent combines DCI transmission with PDSCH data transmissions by piggybacking DCI on the PDSCH. This merging approach allows DCI to be transmitted alongside data using shared resources, improving DCI reception reliability through the robust PDSCH transmission mechanism while reducing overall resource overhead compared to separate dedicated DCI channels.
Solution Approach 2:
The PDSCH resources are made multi-functional, serving both data transmission and DCI transmission purposes. This universality allows the same physical resources to carry multiple types of information, reducing the need for separate dedicated resources for DCI while maintaining reliable transmission through the established PDSCH framework.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may receive, from a base station, a scheduling downlink control information (DCI) communication that schedules a physical downlink shared channel (PDSCH) transmission, the scheduling DCI including an indication of a resource allocation for a DCI communication, wherein the resource allocation for the DCI communication includes one or more resources included in a resource allocation for the PDSCH transmission, and receive the PDSCH transmission that includes the DCI communication based at least in part on the indication of the resource allocation for the DCI communication. Numerous other aspects are provided.