Asymmetric Time Slot Allocation for DECT Data Transmission
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Solution Overview
Problem
Existing telecommunications systems, particularly DECT-based systems, face inefficiencies in transmitting subscriber-specific data with asymmetric data rates between transmission and reception directions, limiting the number of simultaneous connections and requiring expensive hardware or complex modulation processes.
Innovation Solution
The method involves transmitting user-specific data asymmetrically using time slot separation with a ratio of data packets distributed across multiple time frames, allowing for flexible data rate adjustment and efficient utilization of the transmission medium, even with inexpensive 'slow-hopping' radio parts, by optimizing time slot usage and eliminating unnecessary gaps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If symmetric time slot distribution is used for data transmission, then transmission simplicity is maintained, but asymmetric data rate requirements cannot be satisfied
Solution Approach 1:
The patent applies asymmetry by distributing data packets asymmetrically across multiple time frames. Instead of equal time slot allocation for transmission and reception, the system allocates different numbers of time slots to each direction based on asymmetric data rate requirements. This allows the transmission medium to efficiently handle asymmetric traffic patterns while maintaining TDMA/TDD structure.
Solution Approach 2:
The patent implements dynamic time slot allocation where the distribution of data packets between transmission and reception directions can be adjusted based on traffic requirements. The system dynamically determines the number of time slots needed for each direction within multiple time frames, allowing flexible adaptation to varying asymmetric data rate demands without fixed symmetric constraints.
2Power
If multiple full slot time slots are combined to achieve 64 kbps data rate, then data rate requirement is met, but the number of simultaneous connections decreases
Solution Approach 1:
The patent segments the data transmission into multiple smaller time slots distributed across multiple time frames, rather than combining multiple full slots into one large continuous allocation. This segmentation allows the system to achieve the required 64 kbps data rate while maintaining better utilization of the transmission medium and supporting more simultaneous connections by distributing resources more granularly.
Solution Approach 2:
The patent uses periodic time frames with asymmetric distribution of data packets within each period. By organizing transmission into periodic cycles where asymmetric allocation occurs within each time frame, the system achieves high data rates for individual connections while the periodic structure allows efficient sharing of the transmission medium among multiple simultaneous connections.
3Ease of manufacture
If slow-hopping radio parts are used for DECT devices, then device cost is reduced, but the number of simultaneous 64 kbps connections is limited
Solution Approach 1:
The patent ensures continuous utilization of the transmission medium by asymmetrically distributing data packets across multiple time frames without leaving unused gaps. This continuous useful action maximizes the efficiency of slow-hopping radio parts, allowing the system to achieve high connection capacity with lower-cost hardware by eliminating wasted transmission opportunities.
Solution Approach 2:
The patent changes the temporal distribution parameters of data transmission by using asymmetric allocation across multiple time frames. This parameter change optimizes the utilization of slow-hopping radio parts, enabling them to support more simultaneous 64 kbps connections by efficiently managing the timing and distribution of data packets rather than being constrained by traditional symmetric slot allocation.
4Adaptability or versatility
If time slots are allocated asymmetrically to satisfy different data rates in transmission and reception directions, then data rate flexibility is improved, but time slot allocation complexity increases
Solution Approach 1:
The patent creates a universal time slot allocation mechanism that handles both symmetric and asymmetric data transmission requirements through the same asymmetric distribution framework. By designing the system to universally apply asymmetric distribution across multiple time frames, it simplifies the allocation mechanism while maintaining flexibility for different data rate requirements in both transmission and reception directions.
Data Source
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AI summary
During the transmission of subscriber-specific data, particulary via a transfer medium and according to a transmission principle based on time slot transmission with time slot separation, the transfer medium used by several subscribers can also be efficiently used when the data rates of the data transmitted in the transmission direction (SRI) and the reception direction (ERI) for at least one subscriber using the transmission medium are differently, i.e. asymmetrically distributed. To this end, the data to be transmitted for each subscriber are transmitted, as in the case of a symmetric data distribution, in at least two time slots (ZS) per a periodically returning time frame (ZR, ZR1 ZR6) and corresponding to the asymmetrical distribution of the ratio of a number of transmission data packets (SDP) to reception data packets (EDP) in a plurality n half time frame of the time frame (ZR, ZR1 ZR6) with n being greater or equal to 2 and ε N .