Wireless Paging Using Multiple Node Identifiers
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Solution Overview
Problem
Wireless communication systems face challenges in managing paging and registration loads efficiently, especially in deployments with multiple femto cells, leading to high overhead in managing connectivity between mobile units and base stations.
Innovation Solution
The use of different types of identifiers, such as individual node identifiers, cell identifiers, shared identifiers, zone identifiers, and tracking area identifiers, allows networks to efficiently page access terminals by specifying which nodes should page them, reducing the paging and registration loads. Access terminals can provide forward-looking paging lists to the network, enabling more efficient registration and reducing the need for frequent registration at new nodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional paging methods are used in networks with many femto cells, then all access terminals must be paged across all cells, but this results in high paging load and inefficient resource utilization
Solution Approach 1:
The patent segments the network into macro cells and femto cells with distinct paging responsibilities. Macro cells handle high-mobility terminals and initial access, while femto cells handle low-mobility terminals and localized paging. This segmentation allows paging messages to be targeted specifically to relevant cells rather than broadcast network-wide, reducing overall paging load while maintaining productivity.
2Reliability
If access terminals register with every access point they encounter, then connectivity is maintained, but this creates high registration overhead and resource management burden
Solution Approach 1:
The patent applies local quality by creating different registration requirements for different locations. Terminals registering with femto cells (local, low-mobility environments) have different obligations than terminals in macro cells (wide-area, high-mobility environments). Specifically, terminals may be paged by femto cells without needing to register, reducing registration overhead while maintaining reliable connectivity through selective paging.
3Reliability
If the network pages all access terminals in all cells, then no terminal is missed, but this wastes network resources and increases latency
Solution Approach 1:
The patent implements preliminary action by having access terminals provide forward-looking paging lists to the mobility manager before they are actually needed. These lists predict future locations where terminals are likely to be paged, allowing the network to pre-configure paging routes and reduce actual paging latency when calls arrive, while maintaining reliable reachability.
4Area of stationary object
If the network manages connectivity for all terminals at all access points, then complete coverage is ensured, but this increases network complexity and resource management burden
Solution Approach 1:
The patent segments network management responsibilities between macro cells and femto cells. Macro cells manage wide-area coverage and high-mobility terminals, while femto cells manage localized coverage and low-mobility terminals. This segmentation reduces overall network management complexity by distributing responsibilities appropriately, while maintaining complete coverage through the hierarchical structure.
Data Source
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AI summary
A method and apparatus for wireless communication are described. The method comprising determining (504) whether to use a first type of identifier or a second type identifier for registration at a first node (106) and advertising (506) an indication for registration at the first node (106), wherein the indication implies that the second type of identifier and not the first type identifier shall be used for registration.