Uplink Cancellation Indication Using Interlaced RB Reference Regions
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Solution Overview
Problem
The increasing demand for data throughput and diverse communication services in wireless communication systems necessitates efficient methods for using limited radio resources, particularly in managing uplink and downlink transmissions and control information, especially in high-density node and user equipment scenarios, while addressing latency and prioritization of transmissions.
Innovation Solution
A method for user equipment (UE) and base station (BS) to utilize a reference resource region for uplink cancellation indications, involving interlaced resource blocks, to determine whether to cancel or perform uplink transmissions based on overlapping resources and priority levels, with optional listen-before-talk processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of UEs served by a BS increases to meet growing communication demand, then communication capacity and service coverage improve, but resource allocation complexity and scheduling difficulty increase
Solution Approach 1:
The patent segments the frequency band into multiple interlaced resource blocks (RBs) with different priority levels. High-priority RBs are allocated for URLLC traffic while low-priority RBs serve eMBB traffic. This segmentation allows the BS to manage different service types independently, reducing scheduling complexity while maintaining high communication capacity for multiple UEs.
Solution Approach 2:
The patent changes the parameter of resource block priority assignment dynamically. The BS can adjust which RBs are designated as high-priority or low-priority based on current traffic conditions and service requirements. This parameter flexibility enables efficient resource allocation across multiple UEs with different service needs without increasing system complexity.
2Loss of time
If uplink cancellation indication information is transmitted to allow UEs to cancel transmissions, then latency is reduced and resource efficiency improves, but signaling overhead increases
Solution Approach 1:
The patent extracts only the essential cancellation indication information and transmits it selectively to UEs that have uplink transmissions scheduled in the affected high-priority RBs. Instead of broadcasting cancellation information to all UEs, the BS identifies and notifies only those UEs whose transmissions need to be cancelled, reducing signaling overhead while maintaining low latency.
Solution Approach 2:
The patent uses a simplified copy of resource allocation information for cancellation indications. Rather than transmitting full scheduling details, the BS transmits compact cancellation indicators that reference the original resource allocation, reducing the amount of signaling data while preserving the necessary information for UEs to cancel their transmissions efficiently.
3Adaptability or versatility
If interlaced resource blocks with different priorities are used to support diverse services, then service versatility improves, but resource management complexity increases
Solution Approach 1:
The patent segments the frequency band into interlaced resource blocks with clearly defined priority levels (high-priority for URLLC, low-priority for eMBB). This segmentation provides a structured framework that supports multiple service types simultaneously while maintaining manageable resource allocation rules, balancing versatility with complexity.
Solution Approach 2:
The patent creates a universal resource block structure that can serve multiple service types through priority assignment. The same interlaced RB framework supports both URLLC and eMBB services, as well as future service types, by simply adjusting priority designations rather than creating separate resource structures for each service, reducing long-term management complexity.
4Reliability
If UEs monitor physical downlink control channel for cancellation indications, then transmission accuracy improves, but processing burden and power consumption increase
Solution Approach 1:
The patent extracts and highlights only the relevant cancellation indication information within the physical downlink control channel that affects the UE's current uplink transmission. UEs are notified only when their specific transmissions in high-priority RBs need to be cancelled, reducing the amount of information they must process while maintaining reliable detection of critical cancellation signals.
Data Source
AI summary
A UE performs operations for: receiving a configuration for a reference resource region for an uplink cancellation indication; receiving scheduling information for scheduling uplink transmission on a frequency band including the reference resource region; receiving uplink cancellation indication information related to the reference resource region; and determining whether to cancel the uplink transmission on the basis of whether a first resource for the uplink transmission overlaps with a second resource, indicated by the uplink cancellation indication information, among resources in the reference resource region. The reference resource region may include one or more RB sets, each including a plurality of interlaced RBs. The uplink cancellation indication information may include a first information part pertaining to at least one of the plurality of interlaced RBs in the one or more RB sets.