Carrier sense adaptive transmission (CSAT) in unlicensed spectrum
First Claim
1. A method of Carrier Sense Adaptive Transmission (CSAT) for reducing interference between Radio Access Technologies (RATs), comprising:
- receiving, at a device, signals associated with a first RAT via a resource, wherein a first transceiver operating in accordance with the first RAT receives the signals;
identifying, by the device, a utilization of the resource that is associated with the first RAT, wherein the identifying is based on extracted characteristics of packets of the first RAT detected in the received signals;
determining a Quality of Service (QoS) requirement associated with the first RAT or a second RAT sharing the resource;
setting, by the device, one or more cycling parameters of a Time Division Multiplexing (TDM) communication pattern defining activated and deactivated periods of transmission for the second RAT, wherein the setting is based on the identified utilization of the resource and the determined QoS requirement;
cycling, by the device, operation of the second RAT between activated and deactivated periods of transmission over the resource in accordance with the TDM communication pattern; and
requesting, by the device, that a measurement be conducted on the resource during a deactivated period of the TDM communication pattern, wherein the measurement is for the signals received using the first transceiver operating in accordance with the first RAT.
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Abstract
Systems and methods for Carrier Sense Adaptive Transmission (CSAT) and related operations in unlicensed spectrum are disclosed to reduce interference between co-existing Radio Access Technologies (RATs). The parameters for a given CSAT communication scheme may be adapted dynamically based on received signals from a transceiver for a native RAT to be protected and an identification of how that RAT is utilizing a shared resource such as an unlicensed band. Other operations such as Discontinuous Reception (DRX) may be aligned with a CSAT Time Division Multiplexed (TDM) communication pattern by way of a DRX broadcast/multicast message. Different TDM communication patterns may be staggered in time across different frequencies. Channel selection for a co-existing RAT may also be configured to afford further protection to native RATs by preferring operation on secondary channels as opposed to primary channels.
56 Citations
20 Claims
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1. A method of Carrier Sense Adaptive Transmission (CSAT) for reducing interference between Radio Access Technologies (RATs), comprising:
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receiving, at a device, signals associated with a first RAT via a resource, wherein a first transceiver operating in accordance with the first RAT receives the signals; identifying, by the device, a utilization of the resource that is associated with the first RAT, wherein the identifying is based on extracted characteristics of packets of the first RAT detected in the received signals; determining a Quality of Service (QoS) requirement associated with the first RAT or a second RAT sharing the resource; setting, by the device, one or more cycling parameters of a Time Division Multiplexing (TDM) communication pattern defining activated and deactivated periods of transmission for the second RAT, wherein the setting is based on the identified utilization of the resource and the determined QoS requirement; cycling, by the device, operation of the second RAT between activated and deactivated periods of transmission over the resource in accordance with the TDM communication pattern; and requesting, by the device, that a measurement be conducted on the resource during a deactivated period of the TDM communication pattern, wherein the measurement is for the signals received using the first transceiver operating in accordance with the first RAT. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. An apparatus for Carrier Sense Adaptive Transmission (CSAT) for reducing interference between Radio Access Technologies (RATs), comprising:
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a first transceiver of a device configured to receive signals associated with a first RAT via a resource, wherein the first transceiver operates in accordance with the first RAT to receive the signals; at least one processor of the device; and at least one memory of the device coupled to the at least one processor, the at least one processor and the at least one memory being configured to; identify a utilization of the resource that is associated with the first RAT, wherein the identifying identification is based on extracted characteristics of packets of the first RAT detected in the received signals, determine a Quality of Service (QoS) requirement associated with the first RAT or a second RAT sharing the resource, set one or more cycling parameters of a Time Division Multiplexing (TDM) communication pattern defining activated and deactivated periods of transmission for the second RAT, wherein the setting is based on the identified utilization of the resource and the determined QoS requirement, control cycling of operation of the second RAT between activated and deactivated periods of transmission over the resource in accordance with the TDM communication pattern, and request that a measurement be conducted on the resource during a deactivated period of the TDM communication pattern, wherein the measurement is for the signals received using the first transceiver operating in accordance with the first RAT.
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Specification