Bluetooth low energy address resolving

A private address resolving node configured to resolve a periodically updated private address of a private address generating node connected to the private address resolving node in a personal area network deploying Bluetooth low energy (BLE), the private address resolving node comprising:

• a BLE communications interface;
• and
• processing circuitry configured to:
• receive, from a private address generating node in the personal area network, an Identity Resolving Key (IRK), the IRK being received over an encrypted link established between the private address resolving node and the private address generating node;
• receive, from the private address generating node, private address update information that includes (i) timing information defining at least a time interval that indicates how often the private address resolving node should update a private address of the private address generating node and (ii) further information defining how to update the private address;
• detect that the time interval has elapsed;
• determine, based on the received IRK and the received private address update information, a new private address to be used when addressing a next message to the private address generating node;
• and
• after detecting that the time interval has elapsed, update the private address of the private address generating node, wherein updating the private address comprises setting the private address to the new private address.

A private address resolving node configured to resolve a periodically updated private address of a private address generating node connected to the private address resolving node in a personal area network deploying Bluetooth low energy (BLE), the private address resolving node comprising:

• a receiver configured to receive, over an encrypted link established between the private address resolving node and a private address generating node, an Identity Resolving Key (IRK) and private address update information that includes (i) timing information defining at least a time interval that indicates how often the private address resolving node should update a private address of the private address generating node and (ii) further information defining how to update the private address;
• and
• a processing unit comprising one or more processors, the processing unit being configured to:
• detect that the time interval has elapsed;
• determine a new private address to be used when addressing a next message to the private address generating node based on received IRK and the private address update information;
• and
• after detecting that the time interval has elapsed, update the private address of the private address generating node, wherein updating the private address comprises setting the private address to the new private address.

A method, performed in a private address generating node, of generating a periodically updated private address to be used for addressing messages from a private address resolvable node to the private address generating node in a personal area network deploying Bluetooth low energy (BLE), the method comprising the steps of:

• sending, to a receiving private address resolving node, an Identity Resolving Key (IRK), the IRK being sent over an encrypted link established between the private address generating node and the private address resolving node;
• sending, to the receiving private address resolving node, private address update information that includes (i) timing information defining at least a time interval that indicates how often the private address resolving node should update a private address of the private address generating node and (ii) further information defining how to update the private address;
• detecting that the time interval has elapsed;
• and
• after detecting that the time interval has elapsed, generating, an updated private address of the private address generating node using the private address update information.

A private address generating node configured to generate a periodically updated private addresses to be used for addressing messages from a private address resolving node to the private address generating node in a personal area network deploying Bluetooth low energy (BLE), the private address generating node comprising:

• a BLE communications interface;
• and
• processing circuitry configured to:
• send, to a receiving private address resolving node, an Identity Resolving Key (IRK), the IRK being sent over an encrypted established between the private address generating node and the private address resolving node;
• send, to the receiving private address resolving node, private address update information that includes (i) timing information defining at least a time interval that indicates how often the private address resolving node should update a private address of the private address generating node and (ii) further information defining how to update the private address;
• detect that the time interval has elapsed;
• and
• after detecting that the time interval has elapsed, generate an updated private address of the private address generating node using the private address update information.

A private address generating node configured to generate a periodically updated private address, to be used for addressing messages from a private address resolving node to the private address generating node in a personal area network deploying Bluetooth low energy (BLE), the private address generating node comprising:

• a sender module configured to send, over an encrypted link established between the private address generating node and a private address resolving node, an Identity Resolving Key (IRK), and private address update information that includes (i) timing information defining at least a time interval that indicates how often the private address resolving node should update a private address of the private address generating node and (ii) further information defining how to update the private address;
• and
• a private address generating module configured to:
• detect that the time interval has elapsed;
• after detecting that the time interval has elapsed, generate an updated private address using the private address update information.