Channel Aware Tone Reservation Contention Resolution
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Solution Overview
Problem
Wireless communication systems face challenges in resolving contention between resource elements (REs) allocated for tone reservation signaling and REs allocated to a channel used for downlink signaling, leading to decreased reliability of wireless communications.
Innovation Solution
The implementation of rules for resolving channel aware tone reservation (CATR) contention, where user equipment (UE) receives an indication of a first set of REs for tone reservation signals and determines a second set of REs based on the first set and a contention rule, ensuring non-overlap with downlink signaling REs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If resource elements are allocated for tone reservation signaling based on channel frequency response, then PAPR reduction is improved, but contention with downlink signaling REs occurs leading to decreased reliability
Solution Approach 1:
The patent segments the resource element allocation process into two distinct sets: a first set of REs allocated for tone reservation signaling based on channel frequency response, and a second set of REs allocated for downlink signaling. This segmentation prevents overlap between the two functions, resolving the contradiction by maintaining PAPR reduction benefits while ensuring reliable downlink signaling through dedicated non-overlapping resources.
2Productivity
If tone reservation REs are dynamically selected based on channel conditions, then spectral efficiency is improved, but contention resolution complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-defining contention resolution rules before the actual resource allocation occurs. The network entity determines the first set of REs for tone reservation signaling, then applies pre-established rules to resolve any contention with downlink signaling REs. This preliminary preparation maintains spectral efficiency through dynamic selection while simplifying the actual resolution process through predetermined protocols.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive, from a network entity, control information indicating a first set of resource elements (REs) allocated for a tone reservation signal based on a channel frequency response. The UE and the network entity may determine a second set of REs for the tone reservation signal on the first set of REs and application of a rule. The rule may pertain to contention resolution between REs allocated for tone reservation signaling and REs allocated to a channel used for downlink signaling. The UE may receive both the tone reservation signal and a downlink signal, where the tone reservation signal is received in accordance with the second set of REs.