Enhanced Paging for Link Budget Limited Devices
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Solution Overview
Problem
User equipment (UE) devices that are link budget limited face challenges in detecting paging messages due to poor antenna systems or poor coverage areas, leading to missed calls and lost data, as existing mechanisms are inadequate in ensuring reliable detection of paging channels.
Innovation Solution
The implementation of enhanced paging methods, where base stations transmit special IDs to compute paging frame identifiers and use larger aggregation levels and resource blocks for paging control information, and the allocation of multiple special IDs to manage saturated network capacity, with UE devices entering connected-state discontinuous reception mode to periodically check for resource allocations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If base stations use conventional paging mechanisms with standard aggregation levels and resource blocks, then network capacity is maintained, but link budget limited devices cannot reliably detect paging messages
Solution Approach 1:
The patent applies local quality by implementing different paging transmission parameters specifically for link budget limited devices. Base stations transmit paging messages with enhanced aggregation levels and resource block allocations targeted at devices experiencing poor signal conditions, while maintaining conventional parameters for devices with adequate signal strength. This localized adaptation ensures reliable paging detection for vulnerable devices without unnecessarily consuming network resources for all devices.
Solution Approach 2:
The patent implements parameter changes by dynamically adjusting paging transmission parameters including aggregation level, resource block allocation, and control frame indicator values based on device-specific link budget conditions. These parameter modifications increase the signal strength and reliability of paging messages for link budget limited devices, enabling them to successfully detect and decode paging information despite poor antenna systems or coverage conditions.
2Reliability
If base stations transmit paging messages with larger aggregation levels and more resource blocks, then link budget limited devices can detect paging messages reliably, but network capacity becomes saturated
Solution Approach 1:
The patent applies local quality by implementing different paging transmission parameters specifically for link budget limited devices. Base stations transmit paging messages with enhanced aggregation levels and resource block allocations targeted at devices experiencing poor signal conditions, while maintaining conventional parameters for devices with adequate signal strength. This localized adaptation ensures reliable paging detection for vulnerable devices without unnecessarily consuming network resources for all devices.
Solution Approach 2:
The patent applies partial action by providing enhanced paging resources only to the extent necessary for link budget limited devices. Rather than increasing resources for all devices, the system selectively applies larger aggregation levels and resource block allocations only where needed, based on device-specific link budget assessments. This partial application of enhanced resources achieves reliable paging detection for vulnerable devices while minimizing overall network resource consumption.
3Productivity
If base stations allocate multiple special IDs to manage saturated network capacity, then network capacity is better managed, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple special IDs and their associated paging frame identifier computation rules before network operation. Devices receive and store these predefined ID mappings in advance, allowing them to efficiently determine which special ID to use based on their link budget status without performing complex real-time calculations. This preliminary configuration simplifies the device operation while enabling the network to manage capacity effectively through organized resource allocation.
Data Source
AI summary
For paging user devices that are link budget limited (LBL), a base station transmits a special ID that is used by said devices to identify a paging frame and/or a paging occasion. When transmitting a paging message for an LBL device, the base station may use: (a) larger aggregation and larger CFI (than conventionally allowed) and (b) a larger number of resource blocks (than conventionally allowed) for paging payload. If paging messages for LBL devices saturate the paging frame capacity, the base station may allocate a plurality of special IDs. If paging messages for LBL devices and/or other data transfers saturate network capacity, at least a subset of the LBL devices may be directed to enter a connected-state discontinuous reception (DRX) mode, wherein those devices will remain in connected mode and periodically check for resource allocations. Paging payload information may be repeatedly transmitted in successive subframes, to support soft combining.