PDCCH Resource Location Determination for Non-Legacy UE Access
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In LTE systems, UEs equipped only with the capability to receive PDCCH on non-legacy resources frequently fail to access the network due to challenges in determining the resource location of PDCCH on non-legacy resources during network access procedures.
Innovation Solution
A method where the base station and UE determine the resource location of PDCCH on non-legacy resources using location generation information, such as preset values, UE-related information, or frame/subframe-related information, ensuring that both can identify the resource location regardless of their network access state or equipment capabilities, thereby avoiding network access failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the base station transmits control information using PDCCH on non-legacy resource, then the number of scheduled UEs increases, but UEs equipped only with non-legacy capability cannot access the network
Solution Approach 1:
The patent applies preliminary action by pre-configuring location generation information in the UE before network access. This allows the UE to independently determine PDCCH resource locations on non-legacy resources during the random access procedure, before actual data transmission begins. The location generation information includes parameters like higherLayerIndicator, firstParameter, and secondParameter that enable the UE to calculate resource locations without needing legacy PDCCH assistance.
Solution Approach 2:
The patent introduces location generation information as an intermediary between the base station and the UE. This intermediary contains the necessary parameters (higherLayerIndicator, firstParameter, secondParameter) that mediate the resource location determination process, allowing UEs with non-legacy capability to independently find their PDCCH resources without relying on legacy PDCCH transmission.
2Productivity
If PDCCH on non-legacy resource is used, then resource utilization efficiency improves, but UE capability compatibility deteriorates
Solution Approach 1:
The patent applies local quality by providing different location determination mechanisms for different UE types. UEs with non-legacy capability use the location generation information method with higherLayerIndicator, firstParameter, and secondParameter, while legacy UEs continue to use traditional PDCCH on legacy resources. This localized approach allows each UE type to use the method best suited to its capabilities.
Solution Approach 2:
The patent achieves universality by designing a location generation information mechanism that can serve both legacy and non-legacy UEs through different interpretation paths. The higherLayerIndicator parameter acts as a universal switch that directs legacy UEs to ignore non-legacy resources while enabling non-legacy UEs to utilize them, making the system universally compatible across different UE capability levels.
3Adaptability or versatility
If PDCCH resource location is determined dynamically, then scheduling flexibility increases, but network access complexity for UE increases
Solution Approach 1:
The patent reduces access complexity by performing the complex location determination setup in advance during connection establishment. The base station configures the location generation information (higherLayerIndicator, firstParameter, secondParameter) in RRC signaling before the UE needs to access the network. This preliminary configuration eliminates the need for complex real-time calculations during random access, simplifying the immediate access process while maintaining flexible scheduling capability.
Data Source
AI summary
A data sending method is provided. The data sending method includes: determining, according to location generation information of a PDCCH on a non-legacy resource, a resource location, on a subframe, of the PDCCH on the non-legacy resource; and sending the subframe to a UE, where the PDCCH on the non-legacy resource is contained on the resource location of the subframe, so that the UE determines the resource location, on the subframe, of the PDCCH on the non-legacy resource according to the location generation information. In the embodiments of the present invention, both the base station and the UE may determine a resource location of the PDCCH on the non-legacy resource separately by using the location generation information, thereby avoiding a circumstance that the UE equipped with only the capability of receiving a PDCCH on a non-legacy resource cannot access a network.