Wireless Voice and Data Transacting on Adjacent Timeslots
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Solution Overview
Problem
Conventional TDMA systems, such as DMR, are unable to simultaneously receive and transmit voice and data on adjacent time slots due to limitations in frequency switching speed, which prevents the use of one slot for voice and another for data, such as GPS, during voice calls.
Innovation Solution
A wireless method and apparatus that operate on adjacent time slots by receiving voice on one slot and monitoring the adjacent slot for data, discarding a portion of the voice to create a larger guard time, allowing data transmission in the adjacent slot, and utilizing channel access rules to manage voice and data transmissions, enabling simultaneous voice and data communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional radios operate on adjacent TDMA slots with standard guard time, then frequency switching between slots is performed, but simultaneous voice and data transmission is not possible due to insufficient switching speed
Solution Approach 1:
The patent segments the TDMA slot structure by introducing an extended guard time period between adjacent slots. This segmentation allows the radio to perform frequency switching and state changes (RX to TX and vice versa) during this extended period, thereby enabling simultaneous voice and data operations on adjacent slots without compromising switching speed
Solution Approach 2:
The patent performs preliminary actions by pre-configuring the extended guard time structure and pre-scheduling voice and data transmissions in adjacent slots. The radio prepares for frequency switching and state changes during the extended guard time before the actual voice or data transmission begins, ensuring that switching is completed in advance and simultaneous operations can proceed without interference
2Adaptability or versatility
If the guard time between adjacent slots is increased to allow frequency switching, then simultaneous voice and data transmission becomes possible, but the available time for voice or data transmission in each slot is reduced
Solution Approach 1:
The patent makes the extended guard time structure universal by designing it to work with both voice and data transmissions in adjacent slots. The same extended guard time configuration enables multiple functions: frequency switching, state changes (RX to TX and vice versa), and preparation for both voice and data operations, thereby maximizing the utility of the additional time without requiring separate configurations for different transmission types
3Device complexity
If conventional radios use only two time slots on a 12.5 kHz channel, then the system is simple, but the ability to receive data while operating a voice call is not possible
Solution Approach 1:
The patent introduces dynamics into the TDMA slot structure by making the guard time extendable and adjustable. The extended guard time can be dynamically configured to accommodate the specific requirements of simultaneous voice and data operations, allowing the system to adapt between simple two-slot operation and enhanced concurrent operation modes without fundamentally changing the overall TDMA framework
Data Source
AI summary
A wireless method, apparatus, and system provide simultaneous transacting of voice and data on adjacent timeslots through a combination of channel access rules and sacrificing small audio portions when required. This includes wirelessly operating on at least two timeslots which are adjacent to one another, operating voice on a first timeslot of the at least two timeslots and monitoring a second timeslot of the at least two timeslots for data, and, responsive to a data transmission request and receiving voice on the first timeslot, discarding a portion of the voice in the first timeslot to provide a larger guard time for programming between the first timeslot and the second timeslot and transmitting data in the second timeslot based on the data transmission request.