Classification-based adaptive transmission in unlicensed spectrum

• US 9,445,278 B2
• Filed: 01/15/2015
• Issued: 09/13/2016
• Est. Priority Date: 04/11/2014
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Sadek, Ahmed Kamel
• Primary Examiner(s): Patel, Nimesh
• Application Number:
  US14/597,537
• Publication Number:
  US 20150296384A1
• Time in Patent Office: 607 Days
• US Class Current: 1/1
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 72/1215 for collaboration of different radio technologies
• CPC Class Codes: H04W 72/52 based on load
• CPC Class Codes: H04W 74/0808 using carrier sensing, e.g. carrier sense multiple access [CSMA]
• CPC Class Codes: H04W 88/10 adapted for operation in multiple networks, e.g. multi-mode access points

Abstract

Techniques for communication management between Radio Access Technologies (RATs) sharing operating spectrum in an unlicensed band of radio frequencies are disclosed. Interference may be mitigated by, for example, receiving signaling via a resource. A first RAT may be used to receive the signaling. Based on the received signaling, utilization of the resource associated with the first RAT may be identified. The identified utilization of the resource may be classified based on an attribute associated with the received signaling and a plurality of thresholds associated with the attribute. The plurality of thresholds may define different classes of utilization. Communication by a second RAT over the resource may be adapted based on the classified utilization of the resource.

Claims

1. A method of communication management between Radio Access Technologies (RATs) sharing operating spectrum in an unlicensed band of radio frequencies, comprising:

receiving radio signaling via a communication medium, wherein a first RAT is used to receive the radio signaling;

identifying utilization of the communication medium associated with the first RAT based on the received radio signaling;

classifying the identified utilization of the communication medium based on an attribute associated with the received radio signaling and a plurality of thresholds associated with the attribute, wherein the plurality of thresholds define different classes of utilization and different weightings for each of the different classes of utilization; and

adapting communication by a second RAT over the communication medium based on the classified utilization of the medium.

2. The method of claim 1, wherein the identifying the utilization of the communication medium comprises decoding at least one of a preamble, a Physical (PHY) header, a Medium Access Control (MAC) header, a beacon, a probe request, a probe response, or a combination thereof.

3. The method of claim 1, wherein the identifying the utilization of the communication medium comprises determining at least one of a number of packets associated with the first RAT, a transmission duration for one or more packets associated with the first RAT, or a combination thereof.

4. The method of claim 1, wherein the attribute comprises at least one of a received signal strength associated with a packet of the first RAT, a packet type associated with a packet of the first RAT, a traffic type associated with a packet of the first RAT, a joint attribute associated with two related packets of the first RAT, or a combination thereof.

5. The method of claim 1, wherein the classifying comprises:

comparing the attribute to at least one of a first threshold or a second threshold among the plurality of thresholds, wherein the first threshold corresponds to a lower value of the attribute and the second threshold corresponds to a higher value of the attribute;

classifying the identified utilization of the communication medium as a first class among the classes of utilization in response to the comparing indicating that the attribute is below the first threshold;

classifying the identified utilization of the communication medium as a second class among the classes of utilization in response to the comparing indicating that the attribute is between the first threshold and the second threshold; and

classifying the identified utilization of the communication medium as a third class among the classes of utilization in response to the comparing indicating that the attribute is above the second threshold.

6. The method of claim 5, wherein the identifying the utilization of the communication medium comprises determining a received signal strength for a packet associated with the first RAT, the first class corresponding to a low received signal strength classification, the second class corresponding to a communication medium received signal strength classification, and the third class corresponding to a high received signal strength classification, the low, medium, and high received signal strength classifications being relative to each other with respect to corresponding values of the received signal strength.

7. The method of claim 5, wherein the adapting comprises setting one or more cycling parameters of a Time Division Multiplexed (TDM) communication pattern defining activated and deactivated periods of transmission for the second RAT, the one or more cycling parameters being set differently for the first, second, and third classes.

8. The method of claim 5, wherein the adapting comprises setting a probability associated with a Listen Before Talk (LBT) backoff trigger, the probability being set differently for the first, second, and third classes.

9. The method of claim 1, wherein the classifying comprises classifying the identified utilization of the communication medium based on first and second attributes associated with the received radio signaling and first and second pluralities of thresholds associated with the first and second attributes, respectively, wherein the first and second pluralities of thresholds define the different classes of utilization.

10. The method of claim 9, wherein the different classes of utilization include different classes for different combinations of first attribute and second attribute values.

11. The method of claim 1, wherein:

the communication medium is an unlicensed radio frequency band;

the first RAT comprises Wi-Fi technology; and

the second RAT comprises Long Term Evolution (LTE) technology.

12. The method of claim 1, further comprising:

utilizing a first transceiver, employing the first RAT, for receiving the radio signaling via the medium; and

utilizing a second transceiver, employing the second RAT, for performing the communication over the medium,

wherein the first transceiver and the second transceiver are co-located at a small cell base station.

13. An apparatus for communication management between Radio Access Technologies (RATs) sharing operating spectrum in an unlicensed band of radio frequencies, comprising:

a first transceiver configured to receive radio signaling via a communication medium, wherein a first RAT is used to receive the radio signaling;

at least one processor;

at least one memory coupled to the at least one processor, the at least one processor and the at least one memory being configured to identify utilization of the communication medium associated with the first RAT based on the received radio signaling, and to classify the identified utilization of the communication medium based on an attribute associated with the received radio signaling and a plurality of thresholds associated with the attribute, wherein the plurality of thresholds define different classes of utilization and different weightings for each of the different classes of utilization; and

a second transceiver configured to adapt communication by a second RAT over the communication medium based on the classified utilization of the medium.

14. The apparatus of claim 13, wherein the at least one processor and the at least one memory are configured to identify the utilization of the communication medium by decoding at least one of a preamble, a Physical (PHY) header, a Medium Access Control (MAC) header, a beacon, a probe request, a probe response, or a combination thereof.

15. The apparatus of claim 13, wherein the at least one processor and the at least one memory are configured to identify the utilization of the communication medium by determining at least one of a number of packets associated with the first RAT, a transmission duration for one or more packets associated with the first RAT, or a combination thereof.

16. The apparatus of claim 13, wherein the attribute comprises at least one of a received signal strength associated with a packet of the first RAT, a packet type associated with a packet of the first RAT, a traffic type associated with a packet of the first RAT, a joint attribute associated with two related packets of the first RAT, or a combination thereof.

17. The apparatus of claim 13, wherein the at least one processor and the at least one memory are configured to classify the identified utilization of the communication medium by:

comparing the attribute to at least one of a first threshold or a second threshold among the plurality of thresholds, wherein the first threshold corresponds to a lower value of the attribute and the second threshold corresponds to a higher value of the attribute;

classifying the identified utilization of the communication medium as a first class among the classes of utilization in response to the comparing indicating that the attribute is below the first threshold;

classifying the identified utilization of the communication medium as a second class among the classes of utilization in response to the comparing indicating that the attribute is between the first threshold and the second threshold; and

classifying the identified utilization of the communication medium as a third class among the classes of utilization in response to the comparing indicating that the attribute is above the second threshold.

18. The apparatus of claim 17, wherein the at least one processor and the at least one memory are configured to identify the utilization of the communication medium by determining a received signal strength for a packet associated with the first RAT, the first class corresponding to a low received signal strength classification, the second class corresponding to a communication medium received signal strength classification, and the third class corresponding to a high received signal strength classification, the low, medium, and high received signal strength classifications being relative to each other with respect to corresponding values of the received signal strength.

19. The apparatus of claim 17, wherein the second transceiver is configured to adapt the communication by setting one or more cycling parameters of a Time Division Multiplexed (TDM) communication pattern defining activated and deactivated periods of transmission for the second RAT, the one or more cycling parameters being set differently for the first, second, and third classes.

20. The apparatus of claim 17, wherein the second transceiver is configured to adapt the communication by setting a probability associated with a Listen Before Talk (LBT) backoff trigger, the probability being set differently for the first, second, and third classes.

21. The apparatus of claim 13, wherein the at least one processor and the at least one memory are configured to classify the identified utilization of the communication medium by classifying the identified utilization of the communication medium based on first and second attributes associated with the received radio signaling and first and second pluralities of thresholds associated with the first and second attributes, respectively, wherein the first and second pluralities of thresholds define the different classes of utilization.

22. The apparatus of claim 21, wherein the different classes of utilization include different classes for different combinations of first attribute and second attribute values.

23. The apparatus of claim 13, wherein:

the communication medium is an unlicensed radio frequency band;

the first RAT comprises Wi-Fi technology; and

the second RAT comprises Long Term Evolution (LTE) technology.

24. The apparatus of claim 13, wherein the first transceiver and the second transceiver are co-located at a small cell base station.

25. An apparatus for communication management between Radio Access Technologies (RATs) sharing operating spectrum in an unlicensed band of radio frequencies, comprising:

means for receiving radio signaling via a communication medium, wherein a first RAT is used to receive the radio signaling;

means for identifying utilization of the communication medium associated with the first RAT based on the received radio signaling;

means for classifying the identified utilization of the communication medium based on an attribute associated with the received radio signaling and a plurality of thresholds associated with the attribute, wherein the plurality of thresholds define different classes of utilization and different weightings for each of the different classes of utilization; and

means for adapting communication by a second RAT over the communication medium based on the classified utilization of the medium.

26. The apparatus of claim 25, wherein the attribute comprises at least one of a received signal strength associated with a packet of the first RAT, a packet type associated with a packet of the first RAT, a traffic type associated with a packet of the first RAT, a joint attribute associated with two related packets of the first RAT, or a combination thereof.

27. The apparatus of claim 25, wherein the means for classifying comprises:

means for comparing the attribute to at least one of a first threshold or a second threshold among the plurality of thresholds, wherein the first threshold corresponds to a lower value of the attribute and the second threshold corresponds to a higher value of the attribute;

means for classifying the identified utilization of the communication medium as a first class among the classes of utilization in response to the comparing indicating that the attribute is below the first threshold;

means for classifying the identified utilization of the communication medium as a second class among the classes of utilization in response to the comparing indicating that the attribute is between the first threshold and the second threshold; and

means for classifying the identified utilization of the communication medium as a third class among the classes of utilization in response to the comparing indicating that the attribute is above the second threshold.

28. A non-transitory computer-readable medium comprising instructions, which, when executed by a processor, cause the processor to perform operations for communication management between Radio Access Technologies (RATs) sharing operating spectrum in an unlicensed band of radio frequencies, the non-transitory computer-readable medium comprising:

instructions for receiving radio signaling via a communication medium, wherein a first RAT is used to receive the radio signaling;

instructions for identifying utilization of the communication medium associated with the first RAT based on the received radio signaling;

instructions for classifying the identified utilization of the communication medium based on an attribute associated with the received radio signaling and a plurality of thresholds associated with the attribute, wherein the plurality of thresholds define different classes of utilization and different weightings for each of the different classes of utilization; and

instructions for adapting communication by a second RAT over the communication medium based on the classified utilization of the medium.

29. The non-transitory computer-readable medium of claim 28, wherein the attribute comprises at least one of a received signal strength associated with a packet of the first RAT, a packet type associated with a packet of the first RAT, a traffic type associated with a packet of the first RAT, a joint attribute associated with two related packets of the first RAT, or a combination thereof.

30. The non-transitory computer-readable medium of claim 28, wherein the instructions for classifying comprise:

instructions for comparing the attribute to at least one of a first threshold or a second threshold among the plurality of thresholds, wherein the first threshold corresponds to a lower value of the attribute and the second threshold corresponds to a higher value of the attribute;

instructions for classifying the identified utilization of the communication medium as a first class among the classes of utilization in response to the comparing indicating that the attribute is below the first threshold;

instructions for classifying the identified utilization of the communication medium as a second class among the classes of utilization in response to the comparing indicating that the attribute is between the first threshold and the second threshold; and

instructions for classifying the identified utilization of the communication medium as a third class among the classes of utilization in response to the comparing indicating that the attribute is above the second threshold.