Wireless Listen Mode Control Channel Camping
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Solution Overview
Problem
Wireless devices in STANDBY mode continuously drain power and network resources by transmitting periodic signals, and switching from OFF mode to TRAFFIC mode is time-consuming, necessitating a mode that conserves power and network resources without prolonged reconnection times.
Innovation Solution
Implementing a LISTEN mode where the device passively camps on a control channel, receiving information without transmitting, allowing faster mode transitions and power conservation, and remaining unregistered to save network resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the device switches from OFF mode to TRAFFIC mode, then the device can communicate data messages, but it takes considerable reconnection time
Solution Approach 1:
The device performs preliminary actions by camping on a control channel and decoding system information while in a low-power state, maintaining minimal network presence without full registration. This preliminary positioning allows the device to quickly transition to active communication mode when needed, avoiding the lengthy reconnection process from completely offline state.
2Speed
If the device remains in STANDBY mode, then the device can quickly reconnect to the network, but it drains device power and uses network resources
Solution Approach 1:
The invention extracts the essential network presence function from the power-consuming periodic transmission requirement. The device takes out only the necessary control channel monitoring and system information decoding capabilities while removing the periodic signal transmission that drains power, achieving network awareness without the resource-intensive periodic announcements of traditional standby mode.
Solution Approach 2:
The device applies different operational qualities to different functional components: control channel monitoring operates continuously at low power, while periodic transmissions are eliminated entirely. This local differentiation allows the device to maintain network presence with minimal power consumption by applying standby-like monitoring only where necessary rather than uniformly across all device functions.
3Reliability
If the device transmits periodic signals in STANDBY mode, then the device announces its whereabouts to the network, but it drains power and uses network resources
Solution Approach 1:
The invention extracts the network presence announcement function from the periodic transmission mechanism. Instead of requiring periodic signal transmissions to announce whereabouts, the device maintains presence by camping on the control channel and decoding system information, eliminating the power-consuming periodic announcements while preserving network awareness.
Data Source
Figure 1
Figure 2
AI summary
Camping on a cell of a wireless network is disclosed. One or more available cells are determined for a wireless device. One or more available networks are determined based at least in part on the one or more available cells. A network is selected based at least in part on one or more network selection criteria. A cell of the selected network is selected. The selected cell is camped on, wherein camping enables receiving control channel information from the cell of the selected network. In the event that a registration condition is satisfied, the wireless device is registered on the selected network using control channel information.