Frequency Domain Allocation for Subband Full Duplex
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Solution Overview
Problem
In sub-band full duplex (SBFD) wireless communication systems, conflicts arise when allocated downlink or uplink resources do not exactly match the resources designated by the slot format, leading to inefficiencies in communication.
Innovation Solution
The system implements mechanisms for user equipment (UE) to receive information on slot format configurations and resource allocations, allowing it to identify and communicate over a set of usable resources that overlap with both the resource allocation and the slot format, using logical operations to determine the intersection of allocated and available resources for effective communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If sub-band full duplex (SBFD) is used to enable simultaneous uplink and downlink communication on the same carrier, then communication efficiency and resource utilization are improved, but conflicts arise between allocated resources and slot format designations leading to transmission errors
Solution Approach 1:
The patent implements dynamic resource allocation where the UE adapts its transmission parameters based on the intersection of allocated resources and slot format designations. The system dynamically determines usable resources by performing logical operations between the resource allocation and slot format, allowing flexible adjustment of communication parameters to resolve conflicts between uplink and downlink allocations.
Solution Approach 2:
The patent employs feedback mechanisms where the UE receives slot format information and resource allocation information, processes this information to identify usable resources, and adjusts its transmission accordingly. The system uses feedback from the network about slot formats and resource allocations to resolve conflicts and ensure reliable communication in SBFD scenarios.
2Adaptability or versatility
If resource allocation is performed without considering slot format constraints, then scheduling flexibility is improved, but harmful interference occurs between uplink and downlink transmissions
Solution Approach 1:
The patent applies preliminary anti-action by having the UE perform logical operations between the resource allocation and slot format designation before transmission occurs. This pre-check identifies potential conflicts between uplink and downlink resources, allowing the system to prevent interference by avoiding transmission on conflicting resources rather than attempting to resolve interference after it occurs.
Solution Approach 2:
The patent uses the slot format information as an intermediary element that mediates between the resource allocation and the actual transmission. The UE processes both the resource allocation and slot format designation through logical operations to determine the final usable resources, acting as a mediator that reconciles the potentially conflicting requirements of uplink and downlink communications.
3Reliability
If the system requires exact matching between resource allocation and slot format designation, then transmission reliability is improved, but resource utilization efficiency deteriorates due to unused overlapping resources
Solution Approach 1:
The patent applies partial action by having the UE use only the intersection of allocated resources and slot format designations for transmission. Rather than requiring complete matching or avoiding overlapping resources entirely, the system partially utilizes the overlapping resources by performing logical operations to identify the usable portion, thus improving resource utilization while maintaining reliability for the identified usable resources.
Data Source
AI summary
In wireless communication systems using a subband full duplex carrier, a single slot may include one or more uplink (UL) portions and/or one or more downlink (DL) portions. In a case where a scheduler operating in a 3GPP New Radio (NR) network utilizes a Type 0 or Type 1 resource allocation, part of the DL allocation may fall within the UL portion of the carrier designated by the slot format, or vice versa. User equipment (a UE) may perform a logical operation that identifies, as a usable downlink resource allocation, a set of resource blocks belonging to both a given UL/DL resource allocation and a set of resources designated for UL/DL transmission in the slot format.