Full-Duplex Frequency Hopping Across Uplink RB Sets
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Solution Overview
Problem
Conventional techniques do not support frequency hopping for resource block sets in full-duplex communications, such as sub-band full-duplex (SBFD) communications, due to the presence of downlink sub-bands that cannot be used for uplink transmissions.
Innovation Solution
A user equipment (UE) receives an indication of RB sets with associated frequency hopping parameters and selects a frequency hopping enablement status or pattern based on the full-duplex classification of the slot, enabling frequency hopping for RB sets within a full-duplex communication scheme like SBFD.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If frequency hopping is applied in full-duplex communications with downlink sub-bands, then communication reliability and resource utilization are improved, but interference with downlink transmissions and system complexity increase
Solution Approach 1:
The patent segments the frequency spectrum into distinct sub-bands, with uplink RB sets allocated in uplink sub-bands and downlink transmissions in downlink sub-bands. This segmentation prevents frequency hopping from causing interference to downlink transmissions while still allowing frequency diversity within the uplink portion, thereby improving reliability without introducing harmful interference.
Solution Approach 2:
The patent applies frequency hopping selectively only within uplink sub-bands where it is beneficial, while maintaining dedicated downlink sub-bands that are protected from hopping. This local application of frequency hopping optimizes uplink communication reliability without affecting downlink transmission quality, resolving the contradiction between reliability improvement and interference prevention.
2Productivity
If frequency hopping is enabled for RB sets in full-duplex slots, then resource utilization and frequency diversity are improved, but device complexity and configuration overhead increase
Solution Approach 1:
The patent establishes a universal frequency hopping mechanism that operates within the constrained uplink sub-bands of full-duplex slots. The same frequency hopping algorithms and procedures used in traditional TDD systems can be applied here, providing multi-functionality across different duplexing modes while maintaining manageable device complexity through standardized procedures.
Solution Approach 2:
The patent modifies the frequency hopping parameters (such as hopping bandwidth and target RB selection) to account for the presence of downlink sub-bands. By adjusting these parameters to operate only within uplink sub-bands, the system achieves improved resource utilization while keeping device complexity manageable through parameter adaptation rather than fundamental architectural changes.
3Reliability
If frequency hopping patterns are selected based on full-duplex classification, then frequency diversity gain is improved, but measurement precision and classification accuracy requirements increase
Solution Approach 1:
The patent performs full-duplex slot classification in advance, before frequency hopping is applied. The network identifies which slots are full-duplex slots and pre-determines the uplink sub-band allocations. This preliminary classification allows frequency hopping patterns to be selected based on accurate, pre-known slot types, achieving frequency diversity gain without requiring high measurement precision during the actual hopping process.
Solution Approach 2:
The patent introduces the full-duplex slot classification as an intermediary step that bridges the network's resource allocation and the UE's frequency hopping execution. This intermediary classification mechanism simplifies the relationship between network scheduling and frequency hopping by providing clear, pre-determined slot type information, reducing the measurement precision requirements for the hopping process itself.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. Some wireless communications may support frequency hopping in full-duplex communications. For example, a user equipment (UE) may receive an indication of one or more resource block (RB) sets over which the UE is to perform one or more uplink transmissions during a slot, where each RB set of the one or more RB sets is associated with a set of one or more frequency hopping parameters. The UE may select, for a first RB set of the one or more RB sets, a frequency hopping enablement status or a frequency hopping pattern based on a full-duplex classification of the slot and the set of one or more frequency hopping parameters for the first RB set. Additionally, the UE may perform the one or more uplink transmissions in accordance with the selected frequency hopping enablement status or the selected frequency hopping pattern.