Cell Paging Indicator and Message Transmission for Wireless UEs
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face inefficiencies in paging user equipment (UEs) due to the high consumption of radio resources when sending paging indicators and messages over a wide area at low rates and high transmit power, which is wasteful and not optimized for UEs with varying channel conditions.
Innovation Solution
Implementing a method where a cell sends a paging indicator and UE identification information on a shared control channel, with the option to send a page message on a shared data channel, using link adaptation and hybrid automatic retransmission (HARQ) to improve performance, and potentially sending the paging indicator from multiple cells while the page message is sent from a single cell.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If paging indicators and page messages are sent on overhead channels over a wide area at low rate and high transmit power, then all UEs can reliably receive the paging information, but radio resources are consumed excessively
Solution Approach 1:
The patent applies local quality by transitioning from a uniform paging approach (sending to all UEs) to a targeted approach (sending only to specific UEs). The network identifies the location of the UE being paged and directs paging messages only to that specific cell, rather than broadcasting to all cells in the coverage area. This localized targeting reduces radio resource consumption while maintaining reliable delivery to the intended recipient.
Solution Approach 2:
The patent segments the paging process into two distinct phases: a paging indicator phase and a page message phase. The paging indicator is sent first to notify the UE of an incoming page, and only if the UE acknowledges does the network send the full page message. This segmentation allows the system to use minimal resources for the initial notification while reserving full resource allocation only when necessary, thereby reducing overall radio resource consumption.
2Reliability
If paging is sent to all cells in a wide area, then the UE can be reached regardless of location, but the transmit power required increases
Solution Approach 1:
The patent implements local quality by directing paging transmissions to specific geographic locations (cells) where the UE is known to be present. Instead of transmitting paging signals across the entire network area, the system identifies the UE's current cell and limits transmissions to that localized area, significantly reducing the transmit power required while ensuring the UE receives the page message.
Solution Approach 2:
The patent applies preliminary action by first sending a paging indicator to the UE's current cell before sending the full page message. This preliminary step allows the network to confirm the UE's location and active status, enabling subsequent page message transmission to be targeted efficiently. This preliminary identification action reduces the need for high-power blanket transmissions across multiple cells.
3Loss of energy
If low rate transmission is used for paging, then power consumption is reduced, but the paging message may not be reliably received by disadvantaged UEs
Solution Approach 1:
The patent applies dynamics by adapting the transmission rate and power based on the specific channel conditions of the target UE. The system uses channel quality information to dynamically adjust the modulation and coding scheme for page message transmission. This dynamic adaptation allows the network to use lower power rates for UEs with good channel conditions while allocating higher power and more robust coding for disadvantaged UEs, optimizing the balance between energy efficiency and reception reliability.
Solution Approach 2:
The patent implements parameter changes by modifying transmission parameters (rate, power, coding) based on channel quality feedback from the UE. The network receives channel quality information and adjusts the page message transmission parameters accordingly. This parameter adaptation enables the system to achieve reliable delivery to disadvantaged UEs without unnecessarily consuming high power for UEs with excellent channel conditions.
Data Source
AI summary
Techniques for paging user equipments (UEs) in a wireless communication system are described. In one aspect, a cell sends a paging indicator to a UE, monitors for an acknowledgement from the UE, and sends a page message to the UE if an acknowledgement is received from the UE. The cell may receive channel quality information from the UE and may send the page message with link adaptation and/or HARQ to improve performance. In another aspect, a cell sends a paging indicator on a shared control channel to a UE and sends a page message on a shared data channel to the UE. The paging indicator and page message may be sent from multiple cells to the UE. Alternatively, the paging indicator may be sent from multiple cells to the UE, and the page message may be sent from a single cell to the UE.