Determining a sequence for providing a notification regarding activity recorded by a camera is described. In one aspect, a priority sequence for can be determined based on a variety of characteristics of the available devices registered with the home security system of the camera.

Use of multiple sensors to determine whether motion of an object is occurring in an area is described. In one aspect, an infrared (IR) sensor can be supplemented with a radar sensor to determine whether the determined motion of an object is not a false positive.

Techniques are directed to using communication metric data associated with multiple modulation schemes to achieve a link quality metric that is representative of the link as a whole, across the multiple modulation schemes that may be employed on the link. A calculation of a link quality metric may be triggered by a network layer transmission attempt, with communication metrics accumulated at the link layer of the link. A filter used to calculate the link quality metric may be updated based on network layer transmission attempts, based on successful and/or unsuccessful transmissions at a Media Access Control (MAC) layer of the link. More generally, a calculation of link quality may be triggered by a higher layer transmission attempt while being calculated based on transmission attempts at a lower layer of the link.

A transmitter transmits payload data using Orthogonal Frequency Division Multiplexed (OFDM) symbols. The first OFDM symbol is a first type having a number of sub-carriers which is less than or equal to the number of sub-carriers of the one or more second OFDM symbols of a second type and a guard interval for the first OFDM symbol is selected in dependence upon the longest possible guard interval of the second OFDM symbol. Accordingly an OFDM communications system can be formed in which data is transmitted using a frame structure in which a guard interval is adapted to allow a mix of different types of OFDM symbols.

According to certain embodiments, a method performed by a wireless device comprises receiving an indication corresponding to a communication service and identifying a modulation and coding scheme (MCS) table and/or channel quality indicator (CQI) table from a plurality of defined MCS and/or CQI tables based on the received indication. According to certain embodiments, a method performed by a network node comprises determining a communication service associated to a wireless device and sending the wireless device an indication corresponding to the communication service. The indication enables the wireless device to identify an MCS and/or CQI table from a plurality of defined MCS and/or CQI tables.

Methods and devices for monitoring a radio link control, RLC, communication path for transmitting/receiving data units, DUs are disclosed. The methods/devices including or triggering determining a decline of the RLC communication path based on a timer for one or more unacknowledged/outstanding DUs transmitted/received on the RLC communication path.

To perform appropriate AMC control even if low latency is required. A transmission apparatus includes: a reception section that receives channel quality information communicated between the transmission apparatus and a reception apparatus; a control section that determines one or more first candidates for a value indicating a coding and modulation scheme based on the channel quality information, determines one or more second candidates for a value indicating the coding and modulation scheme based on a parameter related to service quality required for a service communicated between the transmission apparatus and the reception apparatus, and selects a value included in both of the first candidates and the second candidates; and a transmission section that transmits transmission data using the coding and modulation scheme corresponding to the selected value.

A base station transmits a transmission signal to a user equipment (UE) device and a machine type communication (MTC) device. The transmission signal includes a plurality of data subcarriers conveying UE data for the UE device where at least a portion of the data subcarriers convey at least some of the UE data on a UE data layer and convey MTC data for the MTC device on a MTC data layer. The transmission signal also includes a plurality of control subcarriers conveying geographic location dependent control information applying to reception of the data subcarriers by the UE device and by the MTC device. The control subcarriers also convey data layer control information specific to each device.

A fading assessment unit 34 assesses the degree of fading of a received radio wave. An SNR calculation unit 33 calculates an SNR value of a signal based on the radio wave. A communication mode determination unit 35 determines the communication mode of communication from a transmission side of the radio wave on the basis of the result of the assessment by the fading assessment unit 34 and the SNR value calculated by the SNR calculation unit 33.

This application provides a method for communicating a modulation and coding scheme (MCS). A terminal device obtains a modulation order, a code rate, or a spectral efficiency, determines an index of a reference MCS from a mapping table based on the obtained modulation order, code rate, or spectral efficiency, and reports the index of the reference MCS to a network device. The mapping table includes one or more mapping relationships between an MCS index and a modulation order, a code rate, or a spectral efficiency. The terminal device may process uplink or downlink data based on the determined MCS, thereby improving data transmission reliability.