Adapting Maximum Operational Timing Difference for Multicarrier Wireless Devices
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Solution Overview
Problem
Current NR specifications define fixed maximum receive and transmission timing differences for multicarrier operations without considering wireless device (WD) transmit timing management capabilities, limiting WDs that cannot support multiple UL timing management, thereby degrading performance in multicarrier modes such as intra-band EN-DC and intra-band NE-DC.
Innovation Solution
Adaptation of maximum operational timing difference (MOTD) for intra-band multicarrier operation based on the number of independent timing management groups, allowing WDs to determine and manage timing differences dynamically according to their capabilities, enabling flexible multicarrier operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If fixed maximum receive and transmission timing differences are defined for multicarrier operations, then timing management is simplified, but WDs that cannot support multiple UL timing management are limited, degrading performance in multicarrier modes
Solution Approach 1:
The patent makes the maximum operational timing difference (MOTD) dynamic by allowing it to be adapted based on the number of timing management groups supported by the wireless device. Instead of a fixed timing difference, the MOTD changes according to device capabilities, enabling WDs with multiple timing management groups to operate in multicarrier modes while maintaining simplified timing for devices with single timing management.
2Productivity
If multiple timing management groups are supported, then multicarrier operation performance is improved, but device complexity increases
Solution Approach 1:
The patent changes the parameter of maximum operational timing difference based on the number of timing management groups. Devices supporting multiple timing management groups (higher capability) are assigned different MOTD values compared to devices supporting only single timing management, allowing performance optimization without forcing all devices to implement complex multiple timing management capabilities.
Data Source
AI summary
A method, network node and wireless device (WD) for adaptation of maximum operational timing difference (MOTD) for intra-band multicarrier operation based on number of independent timing management groups are disclosed. According to one aspect, a process in a network node includes determining a 5 maximum operational time difference parameter based on a number (N) of transmit timing management groups (TMG) configured at a WD. The process also includes operating to receive or transmit at least one of a: signal S1 between the WD and a first cell and signal S2 between the WD and a second cell based on the determined MOTD parameter. The process also includes using the determined MOTD parameter for one 10 or more operational tasks.