Dual Connectivity Power Control via PDCP Buffer Monitoring
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Dual connectivity electronic devices face limitations in maximizing NR transmission power due to difficulties in applying dynamic power sharing, resulting in insufficient transmission power for simultaneous LTE and NR communication, which can lead to failed data reception by base stations.
Innovation Solution
The electronic device identifies the presence of LTE transmission data via a PDCP buffer and controls the transmission power, allowing for the use of a higher maximum transmission power when no data is being transmitted over the NR network, thereby optimizing power distribution between the two networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If dynamic power sharing is applied to simultaneously transmit LTE and NR signals, then both networks can communicate at the same time, but the maximum transmission power for each network is limited and insufficient power is secured for single-network transmission
Solution Approach 1:
The patent implements dynamic power adjustment by monitoring the PDCP buffer status of the LTE network and adjusting the NR transmission power accordingly. When the LTE PDCP buffer is empty (no data to transmit), the NR network can use maximum transmission power. When LTE data is present, the power is shared between networks. This dynamic adaptation resolves the contradiction by making power allocation flexible rather than fixed.
Solution Approach 2:
The patent changes the transmission power parameter based on the LTE PDCP buffer status. The communication processor dynamically adjusts the NR transmission power level according to whether LTE data is present in the buffer, enabling the system to switch between power-sharing mode and maximum power mode. This parameter change resolves the power limitation issue while maintaining dual connectivity capability.
2Adaptability or versatility
If separate communication processors are used for LTE and NR networks, then heterogeneous communication systems can be processed independently, but data exchange between processors is slow and prevents effective use of maximum transmission power
Solution Approach 1:
The patent introduces the PDCP buffer status as an intermediary indicator that enables fast power control decisions without requiring direct data exchange between the LTE and NR communication processors. By monitoring the LTE PDCP buffer status through an efficient interface, the system can quickly determine power allocation without slow inter-processor data transfer, thus resolving the speed limitation while maintaining independent processing capability.
3Adaptability or versatility
If transmission power is limited to 20 dBm for each network considering 23 dBm maximum shared power, then power sharing is possible, but sufficient transmission power cannot be secured when only one network transmits
Solution Approach 1:
The patent makes transmission power dynamic by linking it to the actual data transmission needs of the LTE network. When LTE has no data in the PDCP buffer, NR can use maximum power (23 dBm) ensuring reliable transmission. When LTE data is present, power is shared appropriately. This dynamic approach ensures both reliability and efficient power utilization.
Solution Approach 2:
The patent implements a feedback mechanism where the communication processor continuously monitors the LTE PDCP buffer status and adjusts NR transmission power based on this feedback. This closed-loop control ensures that power is allocated optimally according to actual network conditions, maintaining reliability while enabling full power utilization when needed.
Data Source
AI summary
An electronic device comprises a first transceiver configured to transmit/receive data via a first communication network, a second transceiver configured to transmit/receive data via a second communication network, and at least one communication processor electrically connected with at least one of the first transceiver and the second transceiver, wherein the at least one communication processor is configured to identify transmission of transmission data via the first communication network, upon transmission of the transmission data via the first communication network, identify whether there is transmission data to be transmitted via the second communication network from a PDCP buffer, and when it is identified that there is no transmission data to be transmitted via the second communication network, perform control to transmit the transmission data to be transmitted via the first communication network, via the first transceiver, based on second maximum transmission power larger than preset first maximum transmission power.