Digital car key
The phone unlocks the car as you approach. UWB distance-binding plus BLE authentication resists relay attacks — no need to take the phone out.
Full-stack solution · Mobile-first
UWB smartphone full-stack solution
A mobile UWB spatial-sensing solution built on the CBU5000V210 — one phone for digital keys, hands-free transit, smart-home pointing, AR finding and nearby interaction, with Aliro / CCC / FiRa ecosystem support.
Use cases
One phone, six UWB scenarios
From leaving home to returning, the CBU5000V210 turns the phone into a spatial-interaction hub.
Hands-free access
Authenticate through gates or doors while the phone stays in a pocket or bag; AoA determines direction with a 0.5–3 m trigger zone.
Smart-home pointing
Point the phone at a TV, speaker or light to pop up a control card — connect without searching or pairing.
AR finding & indoor nav
Phone plus UWB tag or anchor delivers centimeter-level direction and distance for finding keys, cars or items.
Peer-to-peer nearby
Two phones near each other can share files, split bills or team up directionally — no QR code or account search.
Converged radar
The same CBU5000V210 extends to low-power radar for gestures, presence and fine motion sensing.
Six reasons to choose UWB for phones
Six dimensions that define the next-generation mobile spatial experience.
Centimeter ranging
ToF two-way ranging at ±3 cm, far beyond RSSI, makes "trigger only when close" possible.
3D AoA direction
1T3R antenna array supports 3D angle-of-arrival on both azimuth and elevation.
Hardware-grade security
STS scrambling, BLE pairing encryption and optional SE establish an end-to-end trust root.
Low power
BLE keeps the connection; UWB wakes on demand. Typical scenarios barely affect phone battery life.
Ecosystem interoperability
Supports Aliro / CCC / FiRa, ready to connect with mainstream Wallet, automotive and IoT ecosystems.
Radar extension
The same UWB receiver extends to radar for gestures, presence and vital-sign sensing.
Comparison
UWB phone solution vs. traditional connectivity
The same vision of effortless interaction, but Chipsbank UWB wins on precision, security and experience.
| Item | Chipsbank UWB phone solution | BLE / NFC solution | GPS / Wi-Fi positioning |
|---|---|---|---|
| Positioning accuracy | ±3 cm (ToF) / ±1°–±5° (AoA) | Meter to ten-meter scale, environment-sensitive | Poor indoor accuracy, no direction |
| Anti-relay security | UWB distance-binding + STS, inherently anti-relay | RSSI can be relayed and amplified | No distance sense, cannot prevent relay |
| Interaction | Hands-free / point-to-control / near-to-share | Requires opening app, tapping or swiping | No spatial pointing capability |
| Ecosystem compatibility | Aliro / CCC / FiRa interoperable | Mostly proprietary protocols | Not directly compatible with car keys or payments |
| Power | Wake on demand, millisecond ranging | Needs continuous scanning or NFC coil power | Continuous satellite/scan, high power |
| Extensibility | Same chip extends to UWB Radar | Needs extra sensors for perception | No radar or gesture capability |
CB-series UWB Android audio system architecture
From app to UWB air interface: audio and data apps call the middleware over AIDL, the HAL stack manages multi-speaker sessions, SPI drives the CB-series UWB chip, and time-division sessions reach each speaker over the 802.15.4z air interface.
Local device (phone / Controller)
App layer
Audio app
AudioRecord / AudioTrack
Voice / media playback
Data-transfer app
Transparent data service (control / status / file, etc.)
Audio / Session routing · payload is raw byte stream
Framework
UWB Data Xfer Service (AIDL Binder)
ICUwbDataXferService / ICBUwbDataXferCallback
HAL layer
UWB middleware (C/C++ system service, system UID)
M6 Session management
Multi-session pool · one per speaker
speakerId ↔ sessionId
M2 UCI control plane
Device discovery / ranging · STS / sessions × N
M3 UCI data plane
Per-session logical link pool / credit flow control × N
Audio + generic data transfer (for data app)
M4 Audio adaptation &
jitter buffer · PCM split / reassemble+
Multi-speaker synchronization
M5 Crypto adaptation
LL Secure preferred / optional AES-256-GCM hardware acceleration
M1 SPI transport layer
UCI packet TX/RX / GPIO interrupt-driven / DMA / SPI-CRC
Kernel
spidev character device + GPIO IRQ + DMA
Hardware
CB-series UWB chip (UCI v4.0 UWBS, Controller) + antenna
Sessions · Air · Speakers
会话#1
会话#2
会话#3
…
会话#N
UWB air interface (802.15.4z HPR / HPRF, multi-session time-division multiplexing)
音箱1
音箱2
音箱3
…
音箱N
Compatible with mainstream mobile & digital-key ecosystems
Backed by Aliro / CCC / FiRa standards, Chipsbank provides CBU5000V210 baseband capability, protocol adaptation and engineering delivery.
Mobile ecosystem
Automotive digital key ecosystem
BYD
NIO
Li Auto
Xpeng
Tesla
Xiaomi EV
BMW
Mercedes-Benz
Ecosystem access, commercial licensing and certification status depend on ecosystem requirements and project verification results.
Five keys to a solid phone UWB integration
Antenna, coexistence, power, calibration and certification — Chipsbank covers reference design through mass production.
- Antenna layout: 1T3R array requires controlled antenna spacing and distance from metal bezels, typically at the top or back of the phone.
- Wireless coexistence: isolation design with Wi-Fi 6E/7, 5G and GPS bands to avoid intermodulation and sensitivity degradation.
- Power control: BLE maintains connection while UWB works only after wake-up; single ranging event reaches millijoule level.
- Factory calibration: antenna delay, channel phase and temperature compensation ensure consistent AoA and ranging.
- Certification support: FiRa / CCC / Aliro pre-testing and certification-path consulting to shorten time to market.
Converged UWB radar: from ranging to sensing
The same CBU5000V210 does more than ranging — it extends to low-power radar for gestures, presence and fine-motion sensing on the phone.
Customer pain point
To enable ranging, gestures and presence on a phone traditionally requires multiple sensors and separate algorithms.
Product value
- The same UWB receiver reused for radar sensing
- Centimeter-level gesture recognition, presence and fine-motion detection
- Triggered on demand, saving extra sensors and power
Put the UWB smartphone solution into your next product
Reference design, protocol tuning and certification support — delivered as one package to shorten time to market.