ProSe Discovery Resource Pool Configuration for TDD Wireless Devices
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Solution Overview
Problem
In wireless communications, especially for ProSe direct discovery, the lack of standardized rules for handling concurrent and different resource pool configurations from various sources can lead to UE misbehavior and network performance issues, particularly when UEs receive resource pool provisioning for the same discovery carrier from different sources such as serving eNBs and system information.
Innovation Solution
A method and system for determining and prioritizing resource pool configurations for wireless devices operating in TDD or FDD modes, where the UE or network node configures the device to use either a first resource pool configuration from the serving network node or a second configuration from system information, based on availability and coverage status, to ensure consistent and correct resource usage for ProSe discovery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the UE receives resource pool configurations from multiple sources (serving eNB and system information), then the UE has more flexibility in resource selection, but the UE may exhibit misbehavior due to lack of standardized rules for handling concurrent configurations
Solution Approach 1:
The patent inverts the traditional approach by having the UE determine which configuration to use based on coverage status, rather than having the network dictate a single configuration source. The UE autonomously selects between SIB-based and dedicated configurations based on whether it is in-coverage or out-of-coverage, ensuring consistent behavior without network intervention for each decision.
Solution Approach 2:
The patent introduces dynamic configuration selection where the UE adapts its resource pool configuration based on its coverage status. The UE can switch between SIB-based configurations (when out-of-coverage) and dedicated configurations (when in-coverage), making the system flexible and adaptive to changing network conditions while maintaining standardized behavior.
2Reliability
If the UE continuously monitors system information for resource pool configurations, then the UE can stay updated with network changes, but the UE consumes more battery power
Solution Approach 1:
The patent implements periodic monitoring where the UE only monitors system information during specific periods or events (e.g., when transitioning between coverage states), rather than continuously. This reduces battery consumption while ensuring the UE receives configuration updates when necessary for maintaining reliable operation.
Solution Approach 2:
The patent enables the UE to self-determine its coverage status and autonomously select the appropriate configuration source without requiring continuous network signaling. The UE serves itself by making intelligent decisions about when to monitor SIB and when to use dedicated configurations, reducing unnecessary monitoring and battery consumption.
3Reliability
If the network provides dedicated resource pool configurations to all UEs, then the network can control resource usage, but the network generates unnecessary signaling overhead
Solution Approach 1:
The patent applies local quality by providing dedicated configurations only to UEs that need them (in-coverage UEs), while allowing out-of-coverage UEs to use SIB-based configurations. This targeted approach maintains necessary network control where needed while eliminating unnecessary signaling to UEs that can autonomously use standardized configurations.
Solution Approach 2:
The patent segments the UE population into two groups based on coverage status: in-coverage UEs that receive dedicated configurations and out-of-coverage UEs that use SIB-based configurations. This segmentation allows the network to control resource allocation for UEs under its control while reducing signaling overhead for UEs that are autonomous.
4Ease of operation
If the UE uses SIB-based resource pool configuration, then the UE can operate autonomously, but the UE may experience higher interference
Solution Approach 1:
The patent introduces dynamic configuration selection where the UE adapts its resource pool configuration based on its coverage status. The UE can switch between SIB-based configurations (when out-of-coverage) and dedicated configurations (when in-coverage), making the system flexible and adaptive to changing network conditions while maintaining standardized behavior.
Data Source
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AI summary
A method in a wireless device is disclosed. The method comprises receiving one or more resource pool configurations for a particular discovery carrier, the one or more resource pool configurations comprising information indicating one or more of resource elements and subframes that the wireless device should use to monitor for incoming discovery messages and transmit outgoing discovery messages, the received one or more resource pool configurations comprising at least a first resource pool configuration received from a serving network node of the wireless device operating in Time Division Duplex (TDD) mode. The method comprises determining which of the received one or more resource pool configurations that the wireless device should use to monitor for incoming discovery messages and transmit outgoing discovery messages.