Uplink Grant Allocation During Cell DTX Non-Active Periods
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Solution Overview
Problem
The radio access network in wireless communication systems consumes a significant amount of energy, particularly during periods of inactivity, as it maintains operation even when data transmission or reception is not ongoing, leading to energy wastage.
Innovation Solution
Implementing cell discontinuous transmission (DTX) configurations that allow for the identification of non-active periods, enabling the pre-allocation of uplink grants for data transmissions during these periods, thereby reducing the need for continuous energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the radio access network maintains continuous operation to ensure data transmission capability, then network reliability is improved, but energy consumption increases
Solution Approach 1:
The network pre-allocates uplink grants to UEs before entering DTX non-active periods, enabling UEs to transmit uplink data during these periods without requiring the network to maintain continuous operation. This preliminary grant allocation allows the network to enter low-power states while ensuring uplink transmission capability is preserved.
Solution Approach 2:
The patent implements cell discontinuous transmission with periodic active and non-active periods. During non-active periods, the network reduces energy consumption by not transmitting downlink signals, while pre-allocated uplink grants enable UEs to perform necessary uplink transmissions. This periodic operation pattern balances energy saving with maintained network functionality.
2Use of energy by moving object
If the radio access network enters cell DTX non-active periods to save energy, then energy consumption is reduced, but uplink data transmission capability may be compromised
Solution Approach 1:
Uplink grants are allocated to UEs in advance, before the network enters DTX non-active periods. These pre-allocated grants contain all necessary parameters for uplink transmission, allowing UEs to autonomously transmit data during non-active periods without requiring network processing or grant re-allocation, thus preserving uplink capability while saving energy.
Solution Approach 2:
By providing pre-allocated uplink grants with complete transmission parameters, UEs are empowered to autonomously perform uplink transmissions during network non-active periods without requiring continuous network intervention. This self-service mechanism ensures uplink transmission capability is maintained while the network operates in energy-saving mode.
3Productivity
If uplink grants are pre-allocated for DTX non-active periods, then network efficiency is improved, but device complexity increases
Solution Approach 1:
Uplink grants are configured in advance with all necessary transmission parameters including time-frequency resources, modulation and coding schemes, and power control settings. This preliminary configuration eliminates the need for real-time grant allocation during DTX non-active periods, simplifying the management process while maintaining network efficiency.
Data Source
AI summary
Disclosed is a method comprising receiving a cell discontinuous transmission, DTX, configuration for a cell, the cell DTX configuration indicating one or more cell DTX non-active periods of the cell; obtaining at least one uplink grant configuration to be applied for one or more uplink data transmissions during the one or more DTX non-active periods of the cell; determining, based on the at least one uplink grant configuration, an uplink grant for the one or more uplink data transmissions; and transmitting the one or more uplink data transmissions using the determined uplink grant during the one or more cell DTX non-active periods.