Call Indexing for Shared Line Emulation in Multicell Networks
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Solution Overview
Problem
Conventional approaches are unable to effectively emulate a shared line or key line system in a multicell wireless network, as they lack a system for indexing call instances across multiple base stations, thereby failing to identify shared line call instances.
Innovation Solution
The implementation of a call indexing procedure that assigns a call index to each call and distributes it across one or more base stations, allowing for the identification of incoming calls on shared lines and enabling call operations such as answering, holding, and transferring calls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional approaches are used in multicell networks, then base stations can operate independently, but they cannot identify or manage shared line call instances across multiple base stations
Solution Approach 1:
The system segments call management by introducing call instances as discrete, identifiable units. Each call instance is assigned a unique call index that segments the overall call management task into trackable individual calls, enabling the network to handle multiple simultaneous calls on shared lines across different base stations.
Solution Approach 2:
The call index acts as an intermediary element between the shared line system and the distributed base stations. This intermediary enables base stations to identify and manage call instances without requiring complex direct communication protocols, simplifying the overall system architecture while achieving shared line emulation.
2Reliability
If call indexing is implemented across multiple base stations, then shared line call instances can be identified and managed, but information synchronization between base stations becomes more complex
Solution Approach 1:
The system performs preliminary action by pre-assigning unique call indexes to call instances before calls are distributed across the network. This pre-indexing ensures that when calls are handed off between base stations, the call information is already structured and identifiable, preventing information loss during transitions.
Solution Approach 2:
The call index provides a feedback mechanism that allows base stations to track and synchronize call information. Each base station can report back call status using the call index as a reference, enabling the network to maintain accurate, synchronized call information across all base stations without complex synchronization protocols.
Data Source
AI summary
A method for emulating a shared line system in a multicell wireless network. A primary base assigns, to a first call, a call index identifying the first call on a first shared line. The primary base distributes a call record of the first call, including the call index of the first call and a call status of the first call, to at least one secondary base. The method also includes broadcasting, to wireless terminals assigned to the first shared line, the call index of the first call and the call status of the first call. The primary base performs a call operation relating to the first call based on an operation request from one of the wireless terminals assigned to the first shared line. The operation request includes the call index of the first call. Each wireless terminal may display the call index and the call status.