Silicon Laboratories Inc.

Lauri Mikael Hintsala

Esa Piirilä

Hendricus De Ruijter

Wentao Li

A system and method for transferring Bluetooth synchronization from a first Bluetooth device to a second Bluetooth device is disclosed. The first Bluetooth device may already be connected to a remote Bluetooth device. The method includes synchronizing time between the first Bluetooth device and a second Bluetooth device. After time has been synchronized, all relevant information concerning the connection is transmitted to the second Bluetooth. This may be done using an out of band network, such as UART, SPI, Ethernet, or a different wireless network. Once the first Bluetooth device has emptied its transmit queue, it may transfer communication responsibility to the second Bluetooth device.

Out of band bluetooth synchronization transfer

A system having a locator device and a plurality of tag devices is disclosed. The locator device comprises an antenna array allowing it to determine an angle of arrival for incoming signals from each of the plurality of tag devices. The system also defines a sequence of time slots, where each time slot has a specific function. The sequence may start with a locator time slot, where the locator device transmits a packet that informs all of the tag devices that this is the start of the sequence. A sync slot follows the locator time slot, where new tag devices may transmit a sync request to the locator device. Upon receipt of a sync request, the locator device assigns the new tag device a tag slot. Following the sync slot are a plurality of tag slots, where each tag device transmits an AoA packet during its assigned tag slot.

System and method for scalable asset tracking

Systems and methods for detecting and protecting against phase manipulation during AoA or AoD operations are disclosed. For AoA operations, the network device receiving the constant tone extension (CTE) generates an antenna switching pattern, which may be randomly generated. The network device then receives the CTE using a plurality of antenna elements. In one embodiment, the network device compares the phase of portions of the CTE signal received that utilize the same antenna element. If the phase of these portions differs by more than a threshold, the network device detects a malicious attack and acts accordingly. In another embodiment, if the AoA algorithm cannot determine the angle of arrival, the network device detects a malicious attack and acts accordingly. For angle of departure operations, the network device that transmits the CTE signal generates the antenna switching pattern and transmits it to the position engine, which performs the comparisons described above.

System and method for phase manipulation attack protection and detection in AoA and AoD

An apparatus includes a radio frequency (RF) receiver to receive packets. The RF receiver includes first and second synchronization field detectors (SFDs). The first and second SFDs detect synchronization headers generated using first and second physical layer (PHY) modes, respectively.

Apparatus for radio-frequency receiver with multiple operational modes and associated methods

A novel system and method for remotely debugging a network device is disclosed. A debug system is used to transmit debug commands over a network to the network device. The network device interprets the debug commands. The processing unit on the network device includes a special debugging mode where it is able to perform special debug operations. This special debugging mode operates at a priority that is lower than that of the network interface so that the network device can still receive network packets while being debugged. The network device also has the ability to generate responses to the debug commands in some embodiments. The concept of wireless debugging can also be applied to multi-core processors as well.

Growing community of inventors

Jokikunta, Finland

Lauri Mikael Hintsala