Techniques for monitoring the quality of short-range wireless links

• US 8,705,390 B2
• Filed: 07/08/2009
• Issued: 04/22/2014
• Est. Priority Date: 07/28/2008
• Status: Active Grant

• Current Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Original Assignee: Koninklijke Philips N.V.
• Inventors: Zhai, Hongqiang
• Primary Examiner(s): Nguyen, Brian D
• Application Number:
  US13/055,157
• Publication Number:
  US 20110128881A1
• Time in Patent Office: 1,749 Days
• Field of Search: 370/252, 370/236, 370/328, 370/329, 370/338
• US Class Current: 370/252
• CPC Class Codes: H04B 17/24 with feedback of measurements to the transmitter
• CPC Class Codes: H04B 17/309 Measuring or estimating channel quality parameters

Abstract

A method for monitoring of a wireless link quality comprises measuring the link quality of a wireless link (120-XY) between a beacon device (110-X) transmitting a beacon and a beacon device (110-Y) receiving the beacon, wherein the measuring is performed by the receiving device (S320); saving link quality measures in a local neighborhood link quality (LNLQ) table (400) maintained by the receiving device (110-Y) (S330); and advertising the link quality measures of wireless links by transmitting the measures in beacons (S340).

Claims

1. A method for continuous monitoring of wireless link quality of wireless links between neighboring devices in a wireless personal area network (WPAN), comprising:

measuring the link quality of a wireless link between a beacon device transmitting a beacon and a beacon device receiving the beacon, wherein the measuring is performed by the receiving beacon device;

broadcasting a link quality monitoring command;

receiving, from at least one of the neighboring devices of the receiving beacon device, in response to the link quality monitoring command, link quality measures for at least one wireless link between the at least one of the neighboring devices and neighboring devices of the at least one of the neighboring devices; and

advertising link quality measures of wireless links by transmitting the measured link quality measures and the received link quality measures in a link quality information element, LQIE, in beacons sent by the receiving beacon device.

2. The method of claim 1, wherein the link quality measures include at least one of a noise-to-signal ratio, a data transfer rate, and a receive signal strength indicator (RSSI).

3. The method of claim 2, further comprising:

saving the link quality measures in a local neighborhood link quality (LNLQ) table maintained by the receiving beacon device, wherein the LNLQ table includes at least a device address field designating the addresses of receiving beacon devices and transmitting beacon devices, and a link quality field including the link quality measures of wireless links between respective receiving beacon devices and transmitting beacon devices designated in the device address field.

5. The method of claim 1, further comprising updating a local neighborhood link quality (LNLQ) table of a device receiving the LQIE.

4. A method for continuous monitoring of a wireless link quality of a wireless link between neighboring devices in a wireless personal area network (WPAN), comprising:

measuring the link quality of a wireless link between a beacon device transmitting a beacon and a beacon device receiving the beacon, wherein the measuring is performed by the receiving beacon device; and

advertising the link quality measures of wireless links by transmitting the measures in a link quality information element, LQIE, in beacons sent by the receiving beacon device;

wherein the LQIE is a data structure that includes at least;

an element identification field, a length field, a control field, an a plurality of link fields, wherein each link field maintains the link quality measures of a wireless link between a receiving beacon device and a transmitting beacon device.

6. A non-transitory computer readable medium having stored thereon computer executable code that when executed causes a processor to perform a process of monitoring of a wireless link quality of a wireless link between neighboring devices in a wireless personal area network (WPAN), the process comprising:

measuring the link quality of a wireless link between a beacon device transmitting a beacon and a beacon device receiving the beacon, wherein the measuring is performed by the receiving beacon device;

broadcasting a link quality monitoring command;

receiving, from at least one of the neighboring devices of the receiving beacon device, in response to the link quality monitoring command, link quality measures for at least one wireless link between the at least one of the neighboring devices and neighboring devices of the at least one of the neighboring devices;

saving link quality measures in a local neighborhood link quality (LNLQ) table maintained by the receiving beacon device; and

advertising link quality measures of wireless links by transmitting the measured link quality measures and the received link quality measures in a link quality information element, LQIE, in beacons sent by the receiving beacon device.

7. A non-transitory computer readable medium having stored thereon computer executable code that when executed causes a processor to perform a process of monitoring of a wireless link quality of a wireless link between neighboring devices in a wireless personal area network (WPAN), the process comprising:

measuring the link quality of a wireless link between a beacon device transmitting a beacon and a beacon device receiving the beacon, wherein the measuring is performed by the receiving beacon device;

saving link quality measures in a local neighborhood link quality (LNLQ) table maintained by the receiving beacon device; and

advertising the link quality measures of wireless links by transmitting the measures in a link quality information element, LQIE, in beacons sent by the receiving beacon device;

wherein the LQIE is a data structure that includes at least;

an element identification field, a length field, a control field, a plurality of link fields, wherein each link field maintains the link quality measures of a wireless link between a receiving beacon device and a transmitting beacon device.