Shared Fixed Part for DECT and LDC Network Coexistence
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Solution Overview
Problem
Interfacing a low-duty-cycle (LDC) network, such as Zigbee, with a cordless telephony network, like DECT, requires duplicating fixed parts and bridging the two networks to enable access to external networks and manage status and alerts, which is inefficient due to differences in protocols and air interfaces.
Innovation Solution
Modifying the DECT protocol to accommodate LDC networks by using shared fixed parts with unique sync patterns and separate dummy bearers for each network, allowing them to operate parallelly and independently within the cordless telephone system's air interface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate fixed parts are duplicated for each network (DECT and LDC), then each network can operate independently with its own protocol and air interface, but the system complexity and cost increase due to multiple fixed parts and bridging requirements
Solution Approach 1:
The patent merges the fixed parts of DECT and LDC networks into a single shared fixed part that can handle both network types simultaneously. This consolidation eliminates the need for separate fixed parts and bridging infrastructure, reducing system complexity while maintaining the ability to support both protocols independently through virtualization and protocol adaptation layers.
Solution Approach 2:
The shared fixed part is designed with multi-functionality to support both DECT and LDC network operations. It incorporates protocol adaptation mechanisms and virtualization capabilities that allow a single physical infrastructure to serve multiple network functions, eliminating duplication while preserving network-specific characteristics and independence.
2Device complexity
If a shared fixed part is used for both DECT and LDC networks, then system complexity is reduced and resources are optimized, but protocol conflicts and interference may occur between the two different network protocols
Solution Approach 1:
The shared fixed part implements logical segmentation through virtualization, creating separate virtual channels and protocol handling paths for DECT and LDC networks. This segmentation isolates protocol processing so that each network type operates in its own logical space, preventing protocol conflicts and interference while sharing the same physical infrastructure.
Solution Approach 2:
Protocol adaptation layers act as intermediaries between the shared fixed part and the two different network protocols. These intermediary layers translate and adapt protocol-specific requirements, ensuring that DECT and LDC protocols can coexist on the shared infrastructure without direct interference, while maintaining protocol-specific characteristics.
3Use of energy by moving object
If LDC devices use very short data packets with small duty cycles to extend battery life, then energy consumption is reduced, but network synchronization and protocol compatibility with cordless telephony become more difficult
Solution Approach 1:
The system implements dynamic protocol adaptation that adjusts to the varying duty cycles of LDC devices. The shared fixed part can dynamically synchronize with LDC devices during their active periods while maintaining compatibility with DECT protocols, allowing LDC devices to operate with extended battery life using short packets while the system adapts to maintain protocol compatibility.
Solution Approach 2:
The protocol adaptation mechanism changes parameters such as synchronization timing and packet handling to accommodate LDC devices' short duty cycles. By adjusting these parameters dynamically, the system maintains protocol compatibility with both LDC and DECT networks while preserving the energy-efficient operation characteristics of LDC devices.
Data Source
AI summary
An apparatus for enabling operation of a LDC network within a DECT system having a modified protocol, comprising an A-field with an identity of a FP shared by both the DECT system and the LDC network, B-fields with unique sync patterns for the DECT system and the LDC network, respectively; and separate dummy bearers for transmission by the FP for the DECT system and the LDC network, respectively, and a method for using the same.