Isochronous Channel Stream Time Interval Allocation
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Solution Overview
Problem
Current Bluetooth technologies face challenges in efficiently transmitting isochronous data with low delay and managing data transmission and reception between multiple slave devices and a master device, particularly in ensuring regular data packet intervals and reducing transmission latency.
Innovation Solution
The method involves forming Connected Isochronous channel Streams (CIS) or Broadcast Isochronous channel Streams (BIS) channels between a master device and slave devices, allocating time intervals with sub-time intervals for data transmission and reception, where the master device transmits data to slave devices during one sub-time interval and receives user input data during another, allowing for efficient data management and reduced latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If Bluetooth devices use traditional connection methods (BR/EDR or basic BLE), then device compatibility and ease of connection are maintained, but transmission delay increases and isochronous data transfer efficiency deteriorates
Solution Approach 1:
The connection interval is divided into multiple sub-intervals, with specific sub-intervals allocated for different slave devices to transmit isochronous data. This segmentation allows multiple devices to share the connection efficiently without increasing overall transmission delay, resolving the contradiction between low delay and managing multiple devices.
Solution Approach 2:
The patent implements periodic connection intervals with predetermined sub-intervals for data transmission. This periodic structure enables efficient isochronous data transfer by ensuring regular transmission opportunities for each slave device, reducing transmission delay while maintaining manageable connection complexity through automated periodic scheduling.
2Productivity
If multiple slave devices connect to a master device simultaneously using traditional methods, then device versatility is improved, but transmission latency and jitter variations increase
Solution Approach 1:
The connection interval is segmented into multiple sub-intervals, with each sub-interval dedicated to specific slave devices for isochronous data transmission. This ensures that multiple slave devices can transmit data simultaneously without contending for the same transmission time, thereby maintaining high data transfer rates while minimizing transmission latency and jitter variations.
Solution Approach 2:
The patent dynamically assigns specific sub-intervals to different slave devices based on their data transmission requirements. This dynamic allocation optimizes the data transfer rate for each device while ensuring that no device experiences excessive latency, as each has a guaranteed transmission opportunity within the connection interval.
3Use of energy by moving object
If Bluetooth communication uses simplified protocols to reduce overhead, then energy consumption decreases, but data transmission reliability and precision deteriorate
Solution Approach 1:
The patent employs periodic connection intervals with predetermined sub-intervals for data transmission. This periodic structure ensures reliable isochronous data transfer by guaranteeing regular transmission opportunities, maintaining data transmission reliability while keeping power consumption low through the energy-efficient BLE protocol and reduced overhead compared to traditional Bluetooth methods.
Data Source
AI summary
Provided are a method for transmitting and receiving data in a short-range wireless communication system, and a device therefor. More specifically, a method by which a master device transmits and receives data in a short-range wireless communication system comprises the steps of: establishing a connected isochronous channel stream (CIS) channel or a broadcast isochronous channel stream (BIS) channel with at least one first slave device; establishing a CIS channel with at least one second slave device; and transmitting and receiving data to and from the at least one first slave device and the at least one second slave device on the basis of at least one time interval that is periodically allocated, wherein each of the at least one time interval includes at least one sub time interval, and wherein the at least one sub-time interval includes: (i) a first time interval within which a master device is to transmit data to the at least one first slave device and/or the at least one second slave device; and (ii) a second time interval within which the master device is to receive data which is generated on the basis of a user input from the at least one first slave device and/or the at least one second slave device.