Bosch Sensortec
Bosch Sensortec



Pedestrian position tracking:
invented for love

Pedestrian position tracking – Invented for love

"Love will always find a way," as the saying goes. And this is what Tom thought when he set out for a date with Sarah. However, as it turns out, the true challenge would not be the date itself, but getting to the meeting place. Accompany Tom on his odyssey and find out which problems he encounters, how he solves them and whether he will manage to turn his story with Sarah into a happy end!

Lost in navigation – Date or disaster?

Bosch Sensortec
Calculating the route and one’s chances
Inaccurate navigation
Lost GPS – Lost date?
Lost GPS signal
Running out of battery
High power consumption
Disaster – Sarah has left
Running late
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Bosch Sensortec

Calculating the route and one’s chances

Inaccurate navigation

Tom wants to make a good impression on his first date with Sarah. He’s hoping to use his smartwatch's navigation to arrive on time at the appointed café. That’s why accurate navigation and position tracking are essential. But right from the start, Tom’s smartwatch takes a long time to calculate the route and is unable to precisely define the shortest path. Will he arrive on time? Let´s see what happens …

Bosch Sensortec

Lost GPS – Lost date?

Lost GPS signal

After some irritations and detours, Tom seems to have gotten a chance to catch up with his date, Sarah. But all of a sudden, the GPS gets lost when he reaches the city. High buildings and underpasses can block the GPS signal. This means his smartwatch is unable to provide any navigation. Tom is getting increasingly annoyed. In addition, the smartwatch's battery is getting dangerously low. Will he be able to find his way to their meeting place? where Sarah is already waiting?

Bosch Sensortec

Running out of battery

High power consumption

The warning was clear: low battery. After a short time, the battery dies completely. Because of their small size, wearables such as smartwatches and hearables have much smaller batteries than, for example, smartphones. Navigating with GPS, consumes a lot of power and thus quickly drains the battery of those devices. Tom is now running desperately through the streets without any navigational aid.

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Disaster – Sarah has left

Running late

Tom doesn’t give up and tries to find his way without the help of his smartwatch. When he finally arrives at the café, his doubts become certainties: He’s too late. The café is closed and Sarah has already left. Will Tom get a second chance to make up for this disaster?

Bosch Sensortec
Calculating the route and one’s chances Inaccurate navigation
Bosch Sensortec
Lost GPS – Lost date? Lost GPS signal
Bosch Sensortec
Running out of battery High power consumption
Bosch Sensortec
Disaster – Sarah has left Running late

Join Tom en route to his date with Sarah and learn how he sabotaged his chance for romance by using an unreliable smartwatch with GPS navigation only.

Bosch Sensortec

Lost GPS signal

In order to find the most direct path to Sarah, the wearable has to master navigation perfectly. But Tom's smartwatch provides inaccurate data, fails to recognize his current location properly and thus leads him in the wrong direction several times. Because of urban canyons such as high buildings, underpasses or rural areas, the device often lacks reliable GPS or the signal even gets lost completely.

Bosch Sensortec

High power consumption

For Tom´s smartwatch, power consumption is crucial because the space for batteries in small device is limited. This is also true for other types of wearable devices such as hearables. In addition, both navigating with GPS and high sensor performance quickly drain battery life. Power-efficient sensors with smart power management features, and yet also high precision, are thus key.

A second chance

Bosch Sensortec
New watch – new chance?
Arriving in time with position tracking
Keep calm and keep the GPS asleep
Sleeping GPS extends battery life
GPS lost – Position tracking active
Accurate position tracking despite lost GPS signal
Shorter distance – Extended battery life
Power consumption saves up to 80% of energy
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Bosch Sensortec

New watch – new chance?

Arriving in time with position tracking

Sarah is willing to give Tom a second chance. To arrive on time, Tom is using a different smartwatch that promises a reliable and power-efficient navigation function: position tracking, also called pedestrian dead reckoning (PDR). Since position tracking is an always-on feature, the smartwatch immediately finds the correct route right from the start. Let's follow Tom!

Bosch Sensortec

Keep calm and keep the GPS asleep

Sleeping GPS extends battery life

Tom is relaxed: His smartwatch is navigating accurately and the battery power is stable. This new solution tracks Tom's position by applying a motion sensor with an integrated algorithm for pedestrian dead reckoning (PDR): The BHI160BP calculates the user’s relative location and then recalibrates itself every few minutes to obtain the absolute position provided by the GPS module. This way, the GPS can be kept in sleep mode for most of the time, which drastically reduces the wearable device's power consumption and extends its operating time.

Bosch Sensortec

GPS lost – Position tracking active

Accurate position tracking despite lost GPS signal

After reaching the city, with its urban canyons, skyscrapers and underpasses, the position tracking solution BHI160BP ensures that the smartwatch can maintain accurate and reliable navigation even when the GPS signal is weak or blocked. Also, no recalculation is needed because of the seamless and always-on nature of the solution. Tom knows exactly which direction to take!

Bosch Sensortec

Shorter distance – Extended battery life

Power consumption saves up to 80% of energy

After a short walk, Tom has reached the destination even before Sarah. He is surprised to see that his watch’s battery is still almost fully charged! The BHI160BP enables pedestrian position tracking with up to 80% savings in system power consumption compared with a typical GPS-only solution, without compromising on accuracy. When Tom looks up, Sarah is standing in front of him, smiling away. The story has a happy end afterall!

Bosch Sensortec
New watch – new chance? Arriving in time with position tracking
Bosch Sensortec
Keep calm and keep the GPS asleep Sleeping GPS extends battery life
Bosch Sensortec
GPS lost – Position tracking active Accurate position tracking despite lost GPS signal
Bosch Sensortec
Shorter distance – Extended battery life Power consumption saves up to 80% of energy

Follow Tom as he takes a direct route to his date with Sarah and learn how Bosch Sensortec's solutions are invented for life – and love!

Bosch Sensortec

Always navigate accurately

Sarah gives Tom a second chance. He wants to arrive on time by using a new smartwatch with pedestrian position tracking, enabled by the smart sensor BHI160BP. The sensor combines an accelerometer and a gyroscope with a microcontroller and advanced algorithms for pedestrian dead reckoning (PDR). To maintain accuracy, it tracks the users' position, calculates their relative location and then wakes up the GPS module only every few minutes in order to obtain an absolute position. This drastically extends the device's operating time.

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Save up to 80% of energy

Tom's new smartwatch is still almost fully charged when he arrives at the destination for his date. The BHI160BP saves up to 80% in system power consumption compared with a typical GPS-only solution – without compromising on accuracy. It is the industry’s first position-tracking smart sensor that utilizes integrated motion sensors to improve GPS location tracking. This new position-tracking approach is set to enable a new class of compact devices with even smaller batteries.

Bosch MEMS sensing solutions:
Make wearables always wearable

Bosch Sensortec

Meet the world's smallest navigation system: the BHI160BP position-tracking smart sensor