Uplink Control Channel Resource Offset for Wireless Collision Avoidance
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Solution Overview
Problem
The existing wireless communication systems face challenges in efficiently transmitting uplink control channels, particularly in scenarios where radio resource reconfiguration is required, leading to issues like PUCCH resource collisions between eIMTA and legacy UEs in LTE systems.
Innovation Solution
A method for efficiently transmitting uplink control channels by dynamically reconfiguring radio resources, specifically through the use of PUCCH resource allocation techniques such as offset-based resource designation and flexible subframe configurations, to avoid collisions and optimize resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If radio resources are reconfigured dynamically to adapt to changing traffic conditions, then system adaptability and resource utilization are improved, but resource allocation conflicts and collisions occur between different UE types
Solution Approach 1:
The patent segments PUCCH resources into type1 and type2 resources, where type1 resources are allocated for normal operation and type2 resources are allocated when usage change is configured. This segmentation allows different UE types to use different resource sets, preventing collisions while maintaining dynamic adaptability.
Solution Approach 2:
The patent introduces an intermediary mechanism where the network configures usage change information that acts as a mediator between legacy UEs and eIMTA UEs. This intermediary layer enables dynamic resource allocation adjustments without causing conflicts, as the usage change configuration coordinates resource usage between different UE types.
2Productivity
If a common PUCCH region is shared between eIMTA UE and legacy UE, then resource utilization is improved, but resource collisions occur leading to transmission failures
Solution Approach 1:
The patent applies local quality by configuring different PUCCH resource characteristics for different UE types within the same cell. Legacy UEs use type1 resources with specific configurations while eIMTA UEs use type2 resources with offset-based configurations, ensuring each UE type has optimized local resource quality without interference.
Solution Approach 2:
The patent introduces dynamic resource allocation where the network can configure usage change information to switch between type1 and type2 PUCCH resources based on traffic conditions and UE types. This dynamic adjustment allows the system to adapt resource allocation in real-time, maintaining high utilization while preventing collisions.
3Adaptability or versatility
If PUCCH format 1b with channel selection is used for HARQ-ACK transmission, then transmission flexibility is improved, but resource coordination complexity increases with usage change configuration
Solution Approach 1:
The patent changes key parameters of PUCCH resource configuration based on usage change information. When usage change is configured, the system switches to type2 resources with modified parameters including offset-based resource designation and adjusted resource indices, enabling flexible adaptation while managing complexity through parameterization.
Data Source
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Figure 2(a)~2(b)
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AI summary
Abstract: The present invention relates to a method and an apparatus for transmitting an uplink control channel of a terminal in a wireless communication system that supports a use change of radio resources. Specifically, the method comprises the steps of: receiving offset information for a second physical uplink control channel (PUCCH) resource region associated with a second type subframe and a third type subframe, the second PUCCH resource region being set on the basis of a first PUCCH resource region for a first type subframe; and transmitting, to a base station, an acknowledgement/negative-ACK (ACK/NACK) for at least one downlink subframe, using the second PUCCH resource region designated according to the offset information.