Grant-Free Uplink Resource Allocation via Implicit Configuration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, especially in future mobile communication systems, grant-free uplink data transmission faces challenges in reducing control signaling overheads and scheduling latency, leading to reduced flexibility in uplink transmission due to fixed resource allocation.
Innovation Solution
A method involving a UE that transmits first and second radio signals, where the first signal includes pseudorandom sequences for resource allocation, and the second signal is generated using a bit block, allowing for implicit configuration of target sets to reduce uplink control information and improve resource allocation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If grant-free uplink data transmission is employed to save control signaling overheads and reduce scheduling latency, then control signaling overhead is reduced, but flexibility of uplink transmission is reduced due to fixed resource allocation
Solution Approach 1:
The patent introduces dynamic resource allocation within grant-free transmission by allowing UEs to select from multiple pre-configured resource pools with different sizes. The network can dynamically adjust which resource pools are available and how many resources each UE can allocate, enabling flexibility adaptability while maintaining the grant-free paradigm. This resolves the contradiction by making the previously fixed resource allocation dynamic and adaptive to different transmission needs.
Solution Approach 2:
The patent changes the parameter of resource allocation from fixed to variable by introducing multiple resource pool configurations with different resource counts. UEs can select appropriate resource pool sizes based on their data transmission requirements, and the network can adjust these parameters dynamically through RRC signaling. This allows the system to maintain low control overhead while adapting resource allocation to different scenarios.
2Device complexity
If each UE occupies time-frequency resources of a same size when transmitting data, then complexity of reception of base station is reduced, but flexibility of uplink transmission is reduced
Solution Approach 1:
The patent segments the uplink resources into multiple resource pools, where each pool contains a specific number of time-frequency resources. Instead of using a single uniform resource allocation for all UEs, the system divides resources into manageable segments that can be selectively allocated. This segmentation allows the base station to handle different resource sizes systematically while providing UEs with flexible selection options.
Solution Approach 2:
The patent makes resource allocation dynamic by allowing UEs to select from multiple pre-configured resource pool sizes based on their transmission needs. The network can dynamically adjust which resource pools are configured and available, enabling the system to adapt resource allocation to different scenarios while maintaining manageable base station reception complexity through systematic resource pool management.
Data Source
AI summary
The disclosure provides a method and a device in a User Equipment (UE) and a base station for wireless communication. The UE first transmits a first radio signal, and then transmits a second radio signal; wherein the first radio signal includes M1 first radio sub-signal(s), and a first sequence is used for generating the first radio sub-signal; the second radio signal includes M2 second radio sub-signal(s), and a first bit block is used for generating the second radio sub-signal; the M1 is a positive integer, the M2 is a positive integer in a target set, and each element in the target set is a positive integer; and the target set is correlated with at least one of the M1 or the first sequence. The disclosure can save overheads caused by control information and improve spectrum efficiency of uplink transmission.