Mobile Station Paging Channel Segmentation for Identification Accuracy
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Solution Overview
Problem
Existing paging schemes in mobile communication systems fail to unambiguously distinguish between individually-directed and broadcast pages, leading to potential misidentification by mobile stations.
Innovation Solution
The proposed solution involves reserving specific addresses for broadcast purposes and hashing unique identifiers of mobile stations to form distinct groups of bits, which are then sent on separate paging channels, ensuring that mobile stations can accurately differentiate between individually-directed and broadcast pages, thereby optimizing channel capacity for traffic services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a unique identifier (e.g., 32-bit TMSI) is sent on the second paging channel to page a mobile station, then the mobile station can be uniquely identified and paged accurately, but the channel capacity for traffic services is reduced
Solution Approach 1:
The paging system is divided into two stages with two different channels. The first channel carries a group address (PI-RNTI) that pages multiple UEs, and the second channel carries a unique identifier (TMSI) only for the specific UE being paged. This segmentation allows the system to use brief group addressing for most cases while reserving full unique identifiers only when necessary, thereby optimizing channel capacity while maintaining identification accuracy.
Solution Approach 2:
Instead of sending the complete unique identifier in all paging scenarios, the system sends only a partial group address on the first channel. The full unique identifier is sent on the second channel only when actually needed for individual paging. This partial action approach reduces unnecessary transmission of full identifiers, optimizing channel capacity while preserving the ability to uniquely identify mobile stations when required.
2Device complexity
If broadcast pages are sent using the same addressing scheme as individually-directed pages, then the paging system can be simplified, but mobile stations cannot unambiguously distinguish between broadcast and individually-directed pages
Solution Approach 1:
Different addressing qualities are applied to different paging types. Broadcast pages use a specific reserved group address (e.g., all F's or all 0's) that is distinct from individual UE group addresses. This local differentiation in address quality allows mobile stations to unambiguously identify broadcast pages versus individually-directed pages, preventing misidentification while maintaining a relatively simple paging structure.
3Reliability
If mobile stations monitor paging channels frequently to detect pages, then page detection reliability is improved, but power consumption increases
Solution Approach 1:
Mobile stations monitor the paging channel periodically at specific paging occasions rather than continuously. The periodic monitoring is synchronized with the network's paging transmission schedule, allowing UEs to detect pages reliably while consuming minimal power by remaining in low-power mode between monitoring intervals.
Data Source
AI summary
An apparatus and a method for facilitating paging of a mobile station that is capable of being paged either pursuant to an individually-directed page or pursuant to a broadcast page. The page that is generated is of bits that permit unambiguous determination by a mobile station when the mobile station receives an individually-directed page and when the mobile station receives a broadcast page. When bits that are to be used in a page are created at the network, a determination is made as to whether the bits correspond to the bits of a broadcast page. If the bits correspond, the bits of the generated bits are altered.