Methods and apparatus for operating a radio device

• US 7,961,078 B1
• Filed: 06/19/2006
• Issued: 06/14/2011
• Est. Priority Date: 05/30/2002
• Status: Active Grant

• Current Assignee: Novanta Corporation (Novanta Inc.)
• Original Assignee: Trimble Navigation Limited (Trimble Inc.)
• Inventors: Reynolds, Matthew S., Tsai, Harry F., Richards, Joseph L., Pathare, Sumukh N., Post, E. Rehmatulla, Pappu, Ravikanth S., Schoner, Bernd, Maguire, Yael G.
• Primary Examiner(s): Zimmerman; Brian A
• Assistant Examiner(s): Khan; Omer S
• Application Number:
  US11/455,403
• Time in Patent Office: 1,821 Days
• Field of Search: 340/10.2
• US Class Current: 340/10.2
• CPC Class Codes: G06K 7/0008 General problems related to the reading of electronic memory record carriers, independent of its reading method, e.g. power transfer
• CPC Class Codes: G06K 7/10297 arrangements for handling protocols designed for non-contact record carriers such as RFIDs NFCs, e.g. ISO/IEC 14443 and 18092 cryptographic protocols H04L9/00; network security protocols H04L63/00; real-time communication protocols in data switching networks H04L65/00; network protocols for data switching network services H04L67/00

Abstract

A radio device such as a wireless tag reader communicates with multiple types of wireless identification tags in a monitored region. The radio device includes a network interface to receive messages transmitted over a network. In response to receiving a message indicating to reconfigure the radio device to support an additional wireless tag protocol, the radio is reconfigured to support communications with a corresponding new type of wireless identification tag in a monitored region. Based on this technique of reconfiguring the radio device via network messages, the radio device optionally supports additional, new or latest versions of wireless tag protocols without having to physically reprogram or replace the radio device.

Claims

1. A method comprising:

initiating communications with at least one type of wireless identification tags in a monitored region based on use of a corresponding at least one radio communication protocol; and

while carrying out the communications, interleaving i) a portion of dead time during which no portion of the at least one radio communication protocol is transmitted, and ii) a portion of active time during which different portions of the at least one radio communication protocol is transmitted for purposes of communicating with wireless identification tags in the monitored region

wherein initiating communications with the at least one type of wireless identification tags in the monitored region includes;

initiating communications with at least two different types of wireless identification tags in the monitored region based on use of a corresponding set of different radio communication protocols,

initiating a first communication with a first type of wireless identification tag in the region based on use of a first radio communication protocol; and

initiating a second communication with a second type of wireless identification tag in the monitored region based on use of a second radio communication protocol;

wherein interleaving the portion of dead time includes interleaving a respective portion of dead time during which no portion of the corresponding set of different radio communication protocol is transmitted; and

wherein interleaving the portion of active time includes interleaving a respective portion of active time during which different portions of the corresponding set of different radio communication protocols are transmitted for purposes of communicating with wireless identification tags in the monitored region.

2. A method as in claim 1 further comprising:

interleaving the portion of dead time with the active time for purposes of reducing interference with other radio devices in the region attempting to communicate with the wireless identification tags.

3. A method as in claim 1 further comprising:

receiving wireless signals associated with at least one other tag reader; and

wherein interleaving the dead time occurs in response to reception of the wireless signals in the monitored region.

4. A method as in claim 3, wherein receiving the wireless signals includes:

during the dead time, performing a channel occupancy measurement to identify presence of the wireless signals in the monitored region.

5. A method as in claim 1 further comprising scheduling receive time during the portion of dead time for purposes of intercepting a communication from a wireless identification tag in the monitored region.

6. A method as in claim 1, wherein interleaving the portion of active time includes scheduling a portion of the second communication for transmission in the monitored region some time between a first portion of the first communication and a second portion of the first communication, the first portion and the second portion of the first communication being associated with a same logical transaction even though not transmitted in a contiguous block of time.

7. A method as in claim 5, wherein the receive time is scheduled for purposes of aiding in reduction of interference with other radio devices attempting to communicate in the monitored region.

8. A method as in claim 1, wherein the interleaving comprises:

interleaving portions of the at least one corresponding radio communication protocol with i) transmit time during which portions of the at least one communication protocol are used to communicate with the at least one type of wireless identification tags, and ii) receive time during which no portion of any of the at least one radio communication protocol are transmitted in the region.

9. A method as in claim 8 further comprising:

scheduling receive time amongst the transmit time for purposes of intercepting a communication between a remote tag reader and a corresponding wireless identification tag in the region.

10. A method as in claim 8, wherein the receive time is dead time associated with a respective transmitter, the receive time being scheduled for purposes of aiding in reduction of interference with other radio devices attempting to communicate in the region.

11. A method as in claim 8 further comprising:

initiating inclusion of a receive time amongst the transmit time for purposes of receiving wireless signals associated with a tag reader.

12. A method as in claim 11, wherein interleaving the receive time occurs in response to reception of the wireless signals from at least one of multiple wireless identification tags in the region.

13. A method as in claim 11 further comprising:

performing a channel occupancy measurement to identify a presence of the wireless signals in the region.

14. A method comprising:

initiating communications associated with each of multiple types of wireless identification tags in a monitored region;

to carry out the communications, interleaving portions of different types of wireless communication protocols understood by the multiple types of wireless identification tags; and

amongst interleaved portions of the different types of wireless communication protocols, implementing transmit dead times for purposes of receiving communications associated with at least one radio device in the monitored region;

wherein the interleaving and implementing comprise;

during a first time range, transmitting a respective portion associated with a first protocol of the different types of wireless protocols;

during a second time range following the first time range, preventing transmission of any portions of the different radio communication protocols in the monitored region; and

during a third time range following the second time range, transmitting a respective portion associated with a second protocol of the different types of wireless protocols.

15. A method as in claim 14, wherein the second time range is dead time associated with a respective transmitter, the second time range being scheduled for purposes of aiding in reduction of interference with other radio devices attempting to communicate in the monitored region.

16. A method as in claim 14 further comprising:

utilizing a common transmitter resource of a respective wireless identification tag reader to transmit the respective portion associated with the first protocol and the respective portion associated with the second protocol.

17. A method comprising:

initiating communications with multiple wireless identification tags in a region based on use of at least one corresponding radio communication protocol; and

interleaving at least one of different data rates and different bit durations for transmitting respective portions of the at least one corresponding radio communication protocol to communicate with the multiple wireless identification tags in the region;

wherein interleaving the at least one of different data rates and different bit durations includes;

scheduling a first duration of time in a respective transmit sequence for purposes of transmitting a corresponding portion of a first radio communication protocol; and

scheduling a second duration of time, which is different in length than the first duration of time and follows the first duration of time, in the respective transmit sequence for purposes of transmitting a corresponding portion of a second radio communication protocol.

18. A method as in claim 17, wherein the interleaving comprises:

interleaving different modulation types for transmitting the respective portions of the at least one radio communication protocol to communicate with the multiple wireless identification tags in the monitored region.

19. A method comprising:

initiating communications with multiple wireless identification tags in a region based on use of at least one radio communication protocol; and

interleaving different modulation types for transmitting respective portions of the at least one radio communication protocol to communicate with the multiple wireless identification tags in the region;

wherein interleaving the different modulation types comprises;

scheduling a first duration of time in a transmit sequence associated with a transmitter for purposes of transmitting a corresponding portion of a first radio communication protocol according to a first modulation type; and

scheduling a second duration of time in the transmit sequence associated with the transmitter for purposes of transmitting a corresponding portion of a second radio communication protocol according to a second modulation type.

20. A method as in claim 19, wherein the interleaving comprises:

interleaving use of different carrier frequencies for transmitting the respective portions of the at least one type of radio communication protocol to communicate with the at least one type of wireless identification tags in the monitored region.

21. A method as in claim 19, wherein scheduling the first duration of time in the transmit sequence includes allotting an amount of time for the transmitter to communicate with a respective first type of wireless identification tag in the region that understands the first radio communication protocol but not the second radio communication protocol;

and

wherein scheduling the second duration of time in the transmit sequence includes allotting an amount of time for the transmitter to communicate with a respective second type of wireless identification tag in the region that understands the second radio communication protocol but not the first radio communication protocol.

30. A method as in claim 19, further comprising:

partitioning each of at least two different types of wireless communication protocols that are used to communicate with the wireless identification tags in the monitored region; and

interleaving portions of the partitioned protocols on a same wireless identification tag reader output interface to communicate with the multiple types of wireless identification tags in the monitored region.

31. A method as in claim 30, wherein interleaving the portions of the partitioned protocols on the same wireless identification tag reader output interface includes:

scheduling a first protocol on the wireless identification tag reader output to monitor a first type of wireless identification tag at a higher rate than a second type of wireless identification tag in the monitored region.

32. A method as in claim 30, wherein interleaving the portions of the partitioned protocols on the same wireless identification tag reader output interface includes:

adapting a schedule used to interleave the portions of the partitioned protocols to account for monitoring a first type of wireless identification tags at a faster rate than a second type of wireless identification tags in the monitored region.

33. A method as in claim 32, wherein the step of adapting the schedule enables monitoring of the first type of wireless identification tags that move quickly through the monitored region compared to the second type of wireless identification tags that move more slowly through the monitored region.

34. A method as in claim 33 further comprising:

initiating modification of a respective schedule for interleaving the portions of the partitioned protocols on the same wireless identification tag reader output depending on a respective physical environment associated with the monitored region.

35. A method as in claim 30, wherein interleaving portions of the partitioned protocols includes randomly interleaving portions of the partitioned protocols on a given tag reader output channel to communicate with each of the multiple types of wireless identification tags.

36. A method as in claim 30, wherein interleaving portions of the partitioned protocols includes interleaving portions of the partitioned protocols in a round robin fashion on a given tag reader output channel to communicate with each of the multiple types of wireless identification tags.

37. A method as in claim 30 further comprising

allocating more scheduling time on the wireless identification tag reader output to transmit respective portions of a first type of protocol understood by a first type of wireless identification tags than corresponding scheduling time for transmitting respective portions of a second type of protocol on the wireless identification tag reader output to communicate with a respective second type of wireless identification tags.

38. A method as in claim 19, further comprising:

interleaving portions of different commands formatted according to respective different wireless radio communication protocols for communicating with the different types of wireless identification tags in the region.

39. A method as in claim 38, wherein interleaving the portions of different commands includes:

scheduling a first duration of time for purposes of transmitting a corresponding first portion of a first command;

scheduling a second duration of time in a time sequence after the first duration of time for purposes of transmitting a corresponding first portion of a second command.

40. A method as in claim 39, wherein interleaving the portions of different commands includes:

scheduling a third duration of time after the second duration of time for purposes of transmitting a corresponding second portion of the first command.

41. A method as in claim 40, wherein interleaving the portions of different commands includes:

scheduling a fourth duration of time after the third duration of time for purposes of transmitting a corresponding second portion of the second command.

42. A method as in claim 38 further comprising:

partitioning a query command into multiple respective units associated with a first protocol; and

interleaving the multiple respective units amongst other communications on a common output communication channel of a wireless identification tag reader for purposes of learning an identity of different wireless identification tags in the region.

43. A method as in claim 38 further comprising:

interleaving the portions of the different commands onto a shared output channel of a respective wireless identification tag reader for purposes of monitoring one type of wireless identification tag at a higher rate than another type of wireless identification tag in the region.

44. A method as in claim 19, further comprising:

interleaving portions of the corresponding at least one radio communication protocol from a radio device to communicate with the at least one type of wireless identification tags in the monitored region.

45. A method as in claim 44, wherein interleaving the portions includes interleaving work units associated with the at least one type of radio communication protocol, the work units forming a logical radio transaction associated with a particular type of wireless identification tag in the monitored region.

46. A method as in claim 45, wherein interleaving the work units produces at least one of a read and a write with respect to the particular type of wireless identification tags in the monitored region.

22. A method comprising:

initiating communications with at least one type of wireless identification tags in a region based on use of a corresponding at least one type of radio communication protocol; and

interleaving use of different carrier frequencies for transmitting respective portions of the at least one type of radio communication protocol to communicate with the at least one type of wireless identification tags in the region;

wherein interleaving use of the different carrier frequencies includes;

scheduling a first duration of time associated with a transmitter for purposes of transmitting a corresponding first portion of a first type of radio communication protocol according to a first carrier frequency; and

scheduling a second duration of time after the first duration of time for purposes of transmitting a corresponding first portion of a second type of radio communication protocol from the transmitter according to a second carrier frequency.

23. A method as in claim 22, wherein interleaving use of the different carrier frequencies corresponds to interleaving different modulation types for transmitting the respective portions of the at least one radio communication protocol.

24. A method as in claim 22, wherein interleaving the carrier frequencies includes:

scheduling a third duration of time after the second duration of time for purposes of transmitting a corresponding second portion of the first type of radio communication protocol from the transmitter according to the first carrier frequency.

25. A method as in claim 24, wherein interleaving the carrier frequencies includes:

scheduling a fourth duration of time after the third duration of time for purposes of transmitting a corresponding second portion of the second type of radio communication protocol from the transmitter according to the second carrier frequency.

26. A method as in claim 24 further comprising:

although transmitted in different time durations, transmitting the corresponding first portion and the corresponding second portion of the first type of radio communication protocol as part of a same logical transaction.

27. A method as in claim 25 further comprising:

although transmitted in different time durations, transmitting the corresponding first portion and the corresponding second portion of the first type of radio communication protocol as part of a same logical transaction; and

although transmitted in different time durations, transmitting the corresponding first portion and the corresponding second portion of the second type of radio communication protocol as part of a same logical transaction.

28. A method as in claim 22, wherein interleaving use of the different carrier frequencies includes:

scheduling a first duration of time associated with a transmitter for purposes of transmitting a corresponding first portion of the at least one type of radio communication protocol according to a first carrier frequency; and

scheduling a second duration of time after the first duration of time for purposes of transmitting a corresponding second portion of the at least one type of radio communication protocol from the transmitter according to a second carrier frequency.

29. A method as in claim 28, wherein interleaving the carrier frequencies includes:

scheduling a third duration of time after the second duration of time for purposes of transmitting a corresponding second portion of the at least one type of radio communication protocol from the transmitter according to the first carrier frequency.