NETWORK ASSISTED SENSING ON A SHARED BAND FOR LOCAL COMMUNICATIONS
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Accused Products
Abstract
To find a D2D channel, by example a shared channel for offload traffic from an allocated D2D channel, a cellular network access node sends a configuration message with parameters (e.g., sensing time, frequency band, sensing mechanism, cyclic shift) for a D2D device to sense spectrum. From results of this spectrum sensing is decided whether to utilize a frequency band, sensed according to the parameters, for D2D communications. In an embodiment the network selects a subframe configuration to set the sensing time, in which different subframe configurations have different-length guard periods which is the sensing time. In embodiments a first sensing is within a guard period and represents coarse sensing results and if those are not sufficient the network configures a longer sensing time (e.g., spanning multiple subframes) for finer sensing results. The network or alternatively the D2D device decides whether to use the sensed frequency band for offload traffic.
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Citations
42 Claims
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1-22. -22. (canceled)
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23. A method, comprising:
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utilizing parameters in a configuration message communicated downlink between a network access node and a user equipment for setting at least a sensing time during which the user equipment performs spectrum sensing; and deciding from at least a result of the spectrum sensing whether to utilize a frequency band sensed according to the parameters for direct local communications between the user equipment and at least one paired device. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31)
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32. A tangible computer readable memory storing computer program code that is executable by at least one processor, the computer program code comprising:
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code for utilizing parameters in a configuration message communicated downlink between a network access node and a user equipment for setting at least a sensing time during which the user equipment performs spectrum sensing; and code for deciding from at least a result of the spectrum sensing whether to utilize a frequency band sensed according to the parameters for direct local communications between the user equipment and at least one paired device.
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33. An apparatus, comprising:
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at least one processor; and at least one memory storing computer program code; the at least one memory and the computer program code configured, with the at least one processor, to cause the apparatus to at least; utilize parameters in a configuration message communicated downlink between a network access node and a user equipment for setting at least a sensing time during which the user equipment performs spectrum sensing; and decide from at least a result of the spectrum sensing whether to utilize a frequency band sensed according to the parameters for direct local communications between the user equipment and at least one paired device. - View Dependent Claims (34, 35, 36, 37, 38, 39, 40, 41, 42)
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Specification