Dynamic Multi-protocol Manager (DMM)

3万 · 2020-7-27 12:25

Connectivity solutions continue to be widely adopted for sensing and monitoring in applications likeBuilding Security and HVAC systems. A growing trend in these industries is to leverage multiple wirelesstechnologies to enhance and expand applications by capitalizing on the unique benefits of differentwireless standards (that is, BLE for smartphone connectivity, Zigbee® for mesh, Sub-1 GHz for long rangeand low power). The Texas Instruments™ SimpleLink™ platform has the hardware to support theseapplications along with a software module called the Dynamic Multi-protocol Manager (DMM).

3万 · 2020-7-27 12:26

Without DMM, supporting two wireless protocols requires a two-chip design, which can increase board
size and expenses for designers. Alternatively, a single-chip cannot operate two protocols at the same
time, and must bootload a new firmware image every time it switches between them.
Texas Instruments™ single-chip, multi-standard solution supported by the DMM is not only cost-effective,
but also simplifies multi-protocol design. With the SimpleLink™ CC1352R and CC2652R MCU, users can
leverage a single wireless MCU and support multiple different wireless standards. For example, a
multi-band device like the SimpleLink™ CC1352R MCU can support concurrent operation of BLE and
Sub-1 GHz by leveraging the DMM.

3万 · 2020-7-27 12:26

1 What is DMM?
The DMM is a software module that enables a single radio to operate multiple wireless protocols
concurrently by switching between them in real time. This is also known as “Time Multiplexing”, in which
the radio switches between the two protocol stacks by changing the settings, channels, and other
parameters. The DMM will potentially modify the order in which RF commands are scheduled based on
the constraints of the protocol stacks and the user application.
Figure 1 is a visual of the overall architecture of the DMM.

3万 · 2020-7-27 12:27

3万 · 2020-7-27 12:28

The DMM consists of two primary components: the policy table and the scheduler. The policy table is a
set of policies that represent a comprehensive system state with parameters for stack priorities and timing
constraints of RF commands. Furthermore, it calculates which stack has priority in certain application
states, and whether RF commands can be deferred or not.

3万 · 2020-7-27 12:28

The DMM scheduler is a customizable software module that keeps track of RF commands that are
submitted by each protocol stack. The scheduler subsequently uses the policy table to perform scheduling
of the associated stacks. The scheduler determines the priorities listed in the policy table, and allots radio
time to each protocol based on the trigger type, timings, and priority of the command; it can schedule the
command as is, or cancel the command based on the current policy. If a stack submits a command and
there are commands ahead of it in the queue, the scheduler will attempt to fit the command in a free slot.

3万 · 2020-7-27 12:28

For example, the policy table can give higher priority to the Sub-1 GHz stack, causing the scheduler to
preempt the BLE task when there is an immediate need for the Sub-1 GHz state. Table 1 is an example of
a simplified policy table for that instance, in which the Sub-1 GHz sensor uses the TI 15.4 SimpleLink™
Sub-1 GHz stack solution.

3万 · 2020-7-27 12:28

3万 · 2020-7-27 12:28

2 Smart E-Lock: Sub-1 GHz + BLE
Electronic Door Locks in apartments or hotel buildings often require tedious maintenance and installation.
Sub-1 GHz technology enables convenient control of a system of e-locks without the hassle or cost of
wires. By integrating BLE into this system, designers can add a convenient user interface to a phone that
can be used to install or control the system. The interface can potentially provide information about battery
life of individual locks, status of the network, and even unlock or lock doors remotely. This can only be
done concurrently on a single chip by using the DMM software module, which will allow the Sub-1 GHz
stack to work simultaneously with the Bluetooth® network.

3万 · 2020-7-27 12:29

3万 · 2020-7-27 12:29

In a Bluetooth Low Energy system, there is a central (master) role and a peripheral (slave) role, in which
they meet at periodic “connection events” to exchange data. Currently, TI supports a DMM solution that
uses a Sub-1 GHz sensor with a BLE Peripheral. For this E-lock solution, the mobile device (as a BLE
central device) can communicate with the BLE peripheral on connection events, and can send updates on
the Sub-1 GHz network. The Sub-1 GHz communications are asynchronous, and they will most likely be
scheduled between BLE connection events. In case of conflict, priority will typically be given to the
Sub-1 GHz

3万 · 2020-7-27 12:30

Figure 2 is a visual building automation example for electronic door locks connected to a gateway by way
of the Sub-1 GHz, and an individual phone connected to a door lock through BLE.

3万 · 2020-7-27 12:30

3万 · 2020-7-27 12:30

A Zigbee® and BLE door lock system will function similarly for the Electronic Door Lock use case. A phone
can connect to a Zigbee®
router through BLE, and the router will connect to the rest of the Zigbee®
network. The device will default to stay in the Zigbee® mode, and switch to BLE during those specific
events. In case of a priority conflict, BLE is typically given priority.

3万 · 2020-7-27 12:31

3 Get StartedThe DMM is part of the SimpleLink™ ecosystem, which simplifies code migration for all SimpleLink™devices. Interactive training through the SimpleLink™ Academy provides multi-protocol demos andexamples for Dynamic Multi-protocol solutions, Over-The-Air Download (OAD), and “Switching”Multi-protocol solutions.Learn more about the SimpleLink™ MCU platform and get started on building your DMM solution with theSimpleLink Academy DMM Fundamentals Guide.

3万 · 2020-7-27 12:31

4 Resources• SimpleLink™ Multi-Standard wireless MCUs
• DMM Wireless Sensor Network (WSN) Sub-1 GHz and BLE5 Remote Display Demo
• DMM 15.4 Sensor and BLE Remote Display Demo
• DMM User’s Guide

3万 · 2020-7-27 12:32

4.1 Trademarks
Texas Instruments, SimpleLink are trademarks of Texas Instruments.
Bluetooth is a registered trademark of Bluetooth SIG Inc.
Zigbee is a registered trademark of ZigBee Alliance, Inc.
All other trademarks are the property of their respective owners.

2万 · 2020-7-30 16:18

有中文版么哈哈哈。。。。

3万 · 2020-7-30 16:59

21ic小喇叭发表于 2020-7-30 16:18
有中文版么哈哈哈。。。。

等有空我翻译翻译发上来，最近有点小忙

只看该作者 · 2020-7-30 19:51

感谢楼主分享！有中文版就更好了

Dynamic Multi-protocol Manager (DMM)

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