Paging Identification for Wireless Idle Mode Power Reduction
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Solution Overview
Problem
Current idle mode designs in wireless communication systems, such as IEEE 802.16e, result in high power consumption due to the lack of precise location determination of paging messages, leading to inefficient monitoring by mobile stations during the paging listening interval.
Innovation Solution
A wireless communication network and method where a paging controller assigns a unique paging identification to mobile stations entering idle mode, allowing base stations to determine the specific frame in a paging cycle for transmitting paging messages, enabling mobile stations to monitor only the designated frame and reducing the duration of the paging listening interval.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mobile stations monitor the entire paging listening interval to search for paging messages, then paging messages can be reliably received, but power consumption increases
Solution Approach 1:
The patent applies preliminary action by pre-determining and signaling the exact frame location where paging messages will be transmitted. The base station sends a frame number indicator to the mobile station before the paging message is actually transmitted, allowing the mobile station to prepare and wake up only at the specific frame needed, rather than monitoring the entire paging listening interval. This resolves the contradiction by maintaining reliable paging reception while dramatically reducing power consumption.
2Reliability
If the paging listening interval is extended to ensure all paging messages are captured, then paging reliability improves, but the time mobile stations must remain awake increases
Solution Approach 1:
The frame number indicator mechanism performs preliminary action by informing the mobile station in advance of the exact frame where its paging message will appear. This allows the mobile station to sleep through unnecessary frames and wake up only at the predetermined frame, thereby reducing awake time while ensuring reliable paging message capture.
3Adaptability or versatility
If paging messages are transmitted to all mobile stations in a paging cycle, then all stations can be reached, but signaling overhead and congestion increase
Solution Approach 1:
The patent applies local quality by making paging message transmission targeted and location-specific rather than universal. Each paging message is transmitted to a specific frame determined by the mobile station's identity, and only mobile stations destined for that frame need to monitor it. This reduces signaling overhead and congestion while maintaining the ability to reach all mobile stations in the network.
Data Source
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AI summary
A wireless communication network comprising a plurality of paging controllers capable of communication with a plurality of base stations within a coverage area of the network, wherein at least one of the plurality of paging controllers is capable of, if a mobile station within a paging area requests to enter idle mode, assigning a temporary paging identification to the mobile station, and transmitting the temporary paging identification to a base station in communication with the mobile station, wherein the temporary paging identification is used by the base station to determine an index of a paging opportunity or frame in a paging cycle to transmit a paging message for the mobile station.