Camped UE Location Reporting During DRX for Network Energy Savings
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Solution Overview
Problem
Wireless communication systems face challenges in conserving network energy while maintaining communication reliability for inactive user equipment (UEs) due to lack of information about their location, leading to increased power consumption and decreased reliability.
Innovation Solution
User equipment (UEs) transmit response messages, such as uplink keep-alive signals, to network entities during active durations of discontinuous reception (DRX) operations, providing location information that allows the network to adjust communication parameters and conserve energy without impacting inactive UEs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the network entity transmits energy saving signals to reduce network energy consumption, then network energy savings are improved, but communication reliability for camped UEs deteriorates because the UEs lack location information to respond appropriately
Solution Approach 1:
The network entity transmits survey indication messages to camped UEs during their active DRX periods, requesting location information. The UEs respond with their location data, creating a feedback loop that enables the network to make informed energy saving decisions while maintaining communication reliability.
Solution Approach 2:
The network entity collects location information from camped UEs in advance by transmitting survey indications during active DRX periods. This preliminary collection of location data allows the network to plan energy saving actions ahead of time without compromising ongoing communications.
2Reliability
If the network entity continuously monitors all UEs to maintain communication reliability, then communication reliability is improved, but network energy consumption increases
Solution Approach 1:
The network entity monitors camped UEs periodically by transmitting survey indication messages during their active DRX periods rather than continuously. This periodic monitoring approach maintains communication reliability while significantly reducing network energy consumption compared to continuous monitoring.
Solution Approach 2:
The network entity performs partial monitoring by only contacting UEs during their active DRX periods when they are already awake and consuming power. This partial action approach avoids the energy waste of monitoring UEs during their inactive periods while still maintaining reliability.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a message from a network entity in accordance with an active duration of a discontinuous reception (DRX) operation at the UE. The message may include a request for information indicative of a location of the UE within a cell associated with the network entity. The UE may transmit, within the active duration, a response message to the network entity that indicates the information associated with the location of the UE within the cell. Accordingly, the network entity may adjust one or more communication parameters associated with the cell based on receiving the response message from the UE. The UE may monitor for one or more additional messages from the network entity in accordance with the DRX operation and based on transmitting the response message.