The disclosure relates to a method performed by a UE, for using subframes of a radio access network for a D2D communication. The method comprises determining subframes available for D2D communication among subframes of the radio access network. The subframes available for D2D communication exclude a number of subframes of the radio access network, such that a periodicity of the D2D communication in number of subframes divides the number of subframes available for D2D communication. The method also comprises using the determined subframes for enabling D2D communication.

A method determining a timing of an uplink signal includes receiving timing information associated with an uplink signal and a numerology of the uplink signal, wherein the timing information is used to determine a reference time of the uplink signal received from a user equipment (UE), receiving, from the UE, the uplink signal, wherein the receiving is in accordance with the timing information and the numerology of the uplink signal, and measuring an uplink relative time of arrival in accordance with the received uplink signal and the reference time of the uplink signal.

A method of real-time scene detection performed by a wireless communication device includes, performing a first scene detection measurement to determine that the wireless communication device is located in a first scene. The first scene detection measurement is performed at first instant in time. The first scene is a type of environment. The method further includes associating the first scene with a corresponding reference scene of a predetermined set of reference scenes, determining a reference duration associated with the corresponding reference scene, and performing a second scene detection measurement immediately following expiration of the reference duration measured from the first instant in time.

One embodiment is directed to a method (and system and apparatus) for determining timing for a time division duplex (TDD) signal in a distributed antenna system (DAS). The method comprises (and the system and apparatus are configured for) grouping power samples of a downlink portion of the TDD signal into blocks corresponding to a respective time period, comparing power samples of the blocks to a power threshold, assigning the blocks as ON or OFF based on a number of power samples in a respective block that are above the power threshold, identifying a start of a downlink burst in the TDD signal as an ON block preceded by at least a minimum number of consecutive OFF blocks, and controlling at least one component in the DAS based on the start of the downlink burst.

A method of real-time scene detection performed by a wireless communication device includes, performing a first scene detection measurement to determine that the wireless communication device is located in a first scene. The first scene detection measurement is performed at first instant in time. The first scene is a type of environment. The method further includes associating the first scene with a corresponding reference scene of a predetermined set of reference scenes, determining a reference duration associated with the corresponding reference scene, and performing a second scene detection measurement immediately following expiration of the reference duration measured from the first instant in time.

A method can be used for managing a real-time detection related to a scene. A succession of steps of scene detection is spaced apart by time intervals. A time interval separating a current step of scene detection from a previous step of scene detection is adjusted according to an adjustment criterion linked to a previous scene actually detected. The succession of steps and the adjustment are performed by a wireless communication apparatus.

A method for operating a switching control module of TDD switching sub-system includes determining whether current clock time is within a time window of an expected transition from downlink to uplink, the expected transition from downlink to uplink based on a clock setting; when current clock time is within the time window, monitoring a signal indicative of whether a measured power of the downlink signal on a downlink path exceeds a threshold power; when the signal indicates the measured power of the downlink signal does not exceed the threshold power, determining whether filter period has passed without the signal indicating the measured power of the downlink signal exceeds the threshold power; when the filter period has passed without the signal indicating the measured power of the downlink signal exceeds the threshold power, determine an end time of the downlink signal; updating the clock setting based on the determined end time.

There is a need to support narrowband TDD frame structure for narrowband communications. The present disclosure provides a solution by supporting one or more narrowband TDD frame structure(s) for narrowband communications. In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may determine a narrowband TDD frame structure for narrowband communications from a group of narrowband TDD frame structures. In one aspect, the narrowband TDD frame structure may include a set of downlink subframes and more than one special subframe. The apparatus may determine a set of narrowband carriers and a minimum set of subframes on the set of narrowband carriers based at least in part on the set of downlink subframes and more than one special subframe on which a NRS should be transmitted. The apparatus may transmit the NRS using the narrowband TDD frame structure determined for the narrowband communications.

A method for determining threshold signal power for a switching control module of a TDD switching sub-system includes setting a threshold signal power to a first value, wherein the threshold signal power is compared to a measured signal power of a downlink path signal of a telecommunication system from a measurement receiver; determining a first downlink signal time using the first value; adjusting the threshold signal power to a second value; determining a second downlink signal time using the second value; determining a difference between the first and second downlink signal times; when difference between the first and second downlink signal times does not exceed a predetermined threshold, determining whether the second downlink signal time corresponds to a valid downlink signal time; when second downlink signal time corresponds to a valid downlink signal time, setting a fixed threshold signal power for use during online operation of the switching control module.

There is a need to support narrowband TDD frame structure for narrowband communications. The present disclosure provides a solution by supporting one or more narrowband TDD frame structure(s) for narrowband communications. In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may determine a bandwidth for narrowband communications. The apparatus may determine a narrowband TDD frame structure for the narrowband communications. In one aspect, the narrowband TDD frame structure may include at least one of two or more contiguous downlink subframes, or one or more flexible subframes that can be configured as either a downlink subframe or an uplink subframe. The apparatus may communicate with a UE using the narrowband TDD frame structure determined for the narrowband communications.