Paging Congestion Control in Wireless Networks
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Solution Overview
Problem
In wireless communications systems lacking centralized control, congestion in paging channels leads to collisions and inefficiencies, resulting in wasted battery power due to retransmissions and interference, especially during high congestion times.
Innovation Solution
A paging congestion control mechanism where wireless terminals monitor other paging activities and make decisions to yield or transmit based on detected congestion, using a multi-stage paging method with paging indicator signals and signaling resources to optimize communication efficiency and reduce retransmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If devices frequently use direct peer to peer paging to establish connections, then connection establishment capability is improved, but air link resource collision increases
Solution Approach 1:
The patent applies preliminary action by implementing a two-stage paging mechanism where a paging indicator signal is transmitted first to reserve resources, followed by the actual paging signal. This advance reservation prevents resource collisions by securing time-frequency resources before the main paging transmission occurs.
Solution Approach 2:
The patent segments the paging process into two distinct parts: a paging indicator signal (first stage) and a paging signal (second stage). This segmentation allows the indicator to occupy minimal resources while reserving resources for the subsequent paging signal, thereby reducing overall resource collision probability.
2Productivity
If paging resources are shared among multiple devices, then resource utilization efficiency is improved, but paging signal collision increases
Solution Approach 1:
The paging indicator signal serves as a preliminary action that reserves time-frequency resources before the actual paging signal transmission. This advance reservation enables multiple devices to share resources efficiently while preventing collisions through proactive resource allocation.
Solution Approach 2:
The paging indicator signal acts as an intermediary between resource allocation and paging signal transmission. It mediates resource sharing by establishing a reservation mechanism that allows multiple devices to coexist on shared resources without causing collisions.
3Reliability
If retransmission operations are performed due to paging signal collision, then paging signal delivery reliability is improved, but battery power consumption increases
Solution Approach 1:
The paging indicator signal performs preliminary resource reservation to prevent collisions before they occur. By securing resources in advance, the system eliminates the need for retransmissions and associated monitoring operations, thereby conserving battery power while maintaining reliable signal delivery.
4Measurement precision
If monitoring operations are performed to detect paging signals, then paging signal detection accuracy is improved, but battery power consumption increases
Solution Approach 1:
The paging indicator signal provides preliminary information about upcoming paging signals, allowing devices to adjust their monitoring behavior. Devices can enter low-power states between indicator signals, reducing monitoring frequency and power consumption while maintaining detection accuracy through the indicator's advance notice.
5Speed
If paging messages are transmitted during high congestion times, then connection establishment speed is improved, but interference between paging messages increases
Solution Approach 1:
The paging indicator signal performs preliminary resource reservation even during high congestion times, securing time-frequency resources before paging message transmission. This advance booking mechanism allows fast connection establishment while preventing interference through proactive resource allocation, independent of current congestion levels.
Data Source
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Figure 2B
AI summary
Paging congestion control in a wireless communications system is described. Various described methods and apparatus are well suited for use in a peer to peer wireless communications system, e.g., an ad hoc peer to peer wireless network in which decisions are made in a decentralized manner. Wireless terminals, e.g., mobile nodes, monitor other paging activities going on and make back-off, e.g., yielding, decisions with regard to paging based on the results of the monitoring. During a first time interval paging indicator signals are transmitted on paging indicator resources by devices intending to transmit paging signals. During a second time interval paging signals are transmitted on paging signaling resources. Monitored and processed detected paging indicator signals are used by a wireless terminal in deciding whether or not to transmit a paging indicator signal and/or a paging signal.