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A data communication system and method for adaptation depending on att and indication

A data communication and ATT technology, applied in the field of data communication, can solve problems such as incompatible features and cannot fully meet the data exchange requirements of the application layer, so as to save time and computing resources, improve user experience, and reduce costs.

Active Publication Date: 2021-12-31
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a data communication system and method that rely on ATT and indication for adaptation, so as to solve the problem in the above background that the BLE technology in the prior art is not directly compatible with the characteristics of the ISO / IEEE 11073 standard, and cannot fully meet the requirements based on The application layer data exchange requirements of the ISO / IEEE 11073 standard require an adaptation between the ATT layer and the PHD layer to make the lower layer meet the requirements of the upper layer

Method used

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  • A data communication system and method for adaptation depending on att and indication
  • A data communication system and method for adaptation depending on att and indication
  • A data communication system and method for adaptation depending on att and indication

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Embodiment 1

[0078] This embodiment: as figure 1As shown, the protocol stack hierarchical structure of the data communication is from bottom to top respectively the bottom transport layer, attribute protocol (Attribute Protocol, hereinafter referred to as ATT) layer, CPA layer, personal health device application layer data exchange protocol (hereinafter referred to as PHD) ) layer and application layer. The underlying transport layer includes the underlying protocol in the BLE technical standard system that provides functions such as communication links, configuration interfaces, and data services for the ATT layer and its upper layers; ATT running on the ATT layer is a standard in the BLE technical standard system. The main device can Access a set of attributes published by the slave device through the attribute operation method defined in ATT; The distribution layer, the CPA layer uses ATT to complete the communication service; the PHD layer runs the application layer data exchange prot...

Embodiment 2

[0119] Such as Figure 4-11 As shown, the specific flow of the ATT data exchange process in this embodiment is as follows:

[0120] The ATT connection establishment process uses a broadcast process and a device discovery process. The broadcast process is a process in which a BLE device broadcasts data to other BLE devices through a broadcast event defined in BLE, so that the BLE device can be discovered by other BLE devices. The device discovery process is a process in which other BLE devices receive the data packets broadcast by the BLE device through the scan event defined in BLE, and then discover the BLE device.

[0121] More specifically, the process of establishing a connection at the ATT layer is actually a process in which the link layer in the BLE technical standard system uses multiple events to establish the underlying communication link. These events include the broadcast events defined in BLE for establishing connections, scanning events and connection events. ...

Embodiment 3

[0142] The specific flow of the CPA data exchange process in this embodiment is as follows:

[0143] Figure 4 For the logical topology and communication mode in the embodiment, within the effective range, one BLE master device can establish point-to-point connections with one or more BLE slave devices, and the connection links are independent of each other.

[0144] Figure 5 is the sequence diagram of the CPA connection sub-flow. When the CPA layer receives the "ATT layer connection established" event notification sent by the ATT layer, the CPA layer starts the protocol connection process. In this embodiment, the ATT layer and the PHD layer have their own authentication processes, and the CPA itself does not need authentication, so it is suitable for application scenarios that require frequent reconnection between devices, which can greatly shorten the reconnection time and improve user experience.

[0145] The predetermined values ​​written by the CPA Manager through the ...

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Abstract

The present invention belongs to the technical field of data communication, and in particular relates to a data communication system and method for adaptation depending on ATT and indication, wherein the CPA layer is used for the sender CPA layer to encapsulate the APDU transmitted by the PHD layer into a CPA PDU and The CPA PDU is transmitted to the ATT layer through the CPA data exchange process. The present invention solves the problem that the BLE technology in the prior art is not directly compatible with the characteristics of the ISO / IEEE 11073 standard, and cannot fully meet the application layer data exchange requirements based on the ISO / IEEE 11073 standard. , it is necessary to establish an adaptation between the ATT layer and the PHD layer, so that the lower layer can meet the needs of the upper layer. The present invention can maintain the synchronous interaction between the two parties in the application layer, which can save time and computing resources, improve user experience, and reduce cost, and at the same time, it will not have a negative impact on the security of the system, which also avoids the beneficial technical effect of potential safety hazards that occur when the received BLE message is shared by multiple programs in the operating system of the mobile device.

Description

technical field [0001] The invention belongs to the technical field of data communication, and in particular relates to a data communication system and method for adaptation depending on ATT and indication. Background technique [0002] Among many short-range communication technologies, Bluetooth is one of the most widely used and popular technologies. Among them, Bluetooth low energy reuses many modules of the classic Bluetooth protocol stack, defines a new physical layer and link layer, and simplifies the implementation of the protocol stack. Since most health monitoring devices and health applications only need to transmit a small amount of data, this makes Bluetooth low energy have great potential in many fields such as healthcare, sports and fitness, home entertainment, and security. [0003] The ISO / IEEE 11073 series of standards realizes the communication between Personal Health Devices (PHD) used for medical applications and health and the outside world, and transmi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/06H04W4/80
CPCH04L69/08H04L69/24H04W4/80
Inventor 钟代笛曹小英冯海玲段小炼高雪梅
Owner CHONGQING UNIV
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