Time-Frequency Resource Sets for Reliable Random Access in Multi-Cell Links
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Solution Overview
Problem
Existing wireless communication systems face challenges in reducing latency, improving transmission reliability, and managing power consumption, particularly in diverse application scenarios like non-terrestrial networks, where mobility and high latency lead to communication interruptions and access failures.
Innovation Solution
A method involving the use of time-frequency resource sets associated with specific identifiers for random access, allowing nodes to determine target cells within a cell group, enhancing the reliability and robustness of access processes even in conditions of mobility and high latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If nodes use traditional random access methods in non-terrestrial networks, then the system can maintain simple access procedures, but access reliability deteriorates due to high latency and mobility causing communication interruptions and access failures
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple time-frequency resource sets for random access before the actual access attempt. When a node needs to access the network, it can immediately use the pre-configured resource sets without waiting for latency-prone dynamic allocation, thereby improving access reliability while managing latency expectations in non-terrestrial networks
Solution Approach 2:
The patent changes the parameter of time-frequency resource allocation by introducing multiple resource sets with different configurations. This allows the system to adapt to varying latency and reliability requirements by selecting appropriate resource sets, effectively managing the trade-off between access reliability and latency through parameter diversification
2Reliability
If nodes perform re-access after access failure, then the system can attempt to establish communication, but overall access latency increases due to repeated access attempts
Solution Approach 1:
The patent prepares multiple time-frequency resource sets in advance, allowing nodes to attempt access on alternative pre-configured resources immediately if the first attempt fails. This eliminates the need for lengthy re-access procedures, improving access success rate while minimizing the time penalty of retries
Solution Approach 2:
The patent enables nodes to skip lengthy re-access procedures by providing alternative time-frequency resource sets that can be used immediately for subsequent access attempts. This rushing through of the access process using pre-prepared resources reduces the overall time penalty of access failures
3Reliability
If the system uses cell-group-based resource sets, then access robustness improves for mobile nodes, but system complexity increases due to multiple identifier associations
Solution Approach 1:
The patent applies universality by making time-frequency resource sets applicable to multiple cells within a cell group through association with cell-group-level identifiers. This multi-functional approach allows the same resource set to serve multiple cells, improving access robustness for mobile nodes while avoiding the need for completely separate resource configurations for each cell, thus limiting the increase in system complexity
4Reliability
If nodes transmit random access signals on dedicated resources, then transmission reliability improves, but resource efficiency deteriorates due to dedicated resource allocation
Solution Approach 1:
The patent merges dedicated random access resources with cell-group-level identification. By associating time-frequency resource sets with cell-group identifiers rather than individual cell identifiers, multiple cells share the same dedicated resources, thereby maintaining transmission reliability while improving resource efficiency through consolidation and reduced duplication
Data Source
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AI summary
The disclosure provides a method and a device for wireless communication. A first signaling is received, the first signaling including a first identifier and a second identifier; and a first signal is transmitted; wherein the first signaling is used for determining a first time-frequency resource set and a second time-frequency resource set, the first time-frequency resource set and the second time-frequency resource set are associated to the first identifier and the second identifier respectively, the first time-frequency resource set and the second time-frequency resource set are both used for random access. Through reasonably associating the second identifier to the second time-frequency resources in K1 cells, with the first node transmitting K2 candidate cells to facilitate random access, the disclosure improves the rate of successful access.