LTE Terminal Resource Pool Selection for Signaling Overhead Reduction
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Solution Overview
Problem
In LTE systems, the uplink scheduling request mechanism results in significant signaling overhead, and contention-based data transmission without resource allocation from the base station leads to challenges in selecting appropriate resources for optimal communication performance.
Innovation Solution
A communication method where a terminal device determines a target resource pool based on condition parameters such as resource utilization rate, conflict rate, and receiving power, allowing it to communicate with a network device using resources from the selected pool, thereby optimizing resource selection for improved performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If uplink scheduling request mechanism is used, then data transmission can be performed with resource allocation, but signaling overhead increases significantly
Solution Approach 1:
The patent extracts the resource allocation function from the traditional scheduling request mechanism. Instead of requiring explicit scheduling requests and grants, the system pre-allocates multiple resource pools with different characteristics, allowing UEs to autonomously select appropriate resources based on their transmission needs and channel conditions, thereby eliminating most signaling overhead while maintaining reliable data transmission
Solution Approach 2:
The patent implements preliminary action by pre-configuring multiple resource pools with different QoS parameters, coverage enhancement levels, and resource characteristics before data transmission occurs. UEs can directly select from these pre-prepared resources based on their current needs, avoiding the need for real-time scheduling requests and grants, thus reducing signaling overhead while ensuring reliable transmission
2Loss of information
If contention-based data transmission is used, then signaling overhead is reduced, but resource selection becomes challenging for optimal performance
Solution Approach 1:
The patent applies local quality by creating multiple resource pools, each with specialized characteristics optimized for specific transmission scenarios (different QoS requirements, coverage enhancement levels, resource types). This allows UEs to select resources with locally optimized properties matching their specific transmission needs, making contention-based transmission as effective as scheduled transmission without the signaling overhead
Solution Approach 2:
The patent utilizes parameter changes by varying multiple parameters across different resource pools including QoS parameters, coverage enhancement levels, resource block sizes, modulation schemes, and time-frequency configurations. These parameter variations enable UEs to select resources that best match their transmission requirements, simplifying the resource selection process while optimizing transmission performance
3Device complexity
If single resource pool is used, then system complexity is low, but communication performance is limited
Solution Approach 1:
The patent segments the resource space into multiple distinct resource pools, each dedicated to specific transmission scenarios or QoS requirements. This segmentation allows the system to maintain low complexity within each individual pool while achieving high overall performance through the collective capability of multiple pools, as UEs can select the most appropriate pool for their specific transmission needs
Data Source
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AI summary
Embodiments of the present application provide a communication method, a terminal device and a network device, which can improve communication performance. The method includes: determining, by a terminal device, a target resource pool from at least two resource pools according to a condition parameter of each resource pool in the at least two resource pools, wherein the condition parameter is used for indicating a resource usage condition of the resource pool; and communicating, by the terminal device, with a network device by using a resource of the target resource pool.