Methods, systems, and devices for techniques for enabling and disabling of a serializer/deserializer are described. In some examples, a system may be configured to identify information to be transmitted by a serializer/deserializer over a communication channel and activate, based on identifying the information to be transmitted, both a transmission component and a reception component of the serializer/deserializer that are coupled with the communication channel. Additionally or alternatively, in some examples, a system may be configured to identify information to be received by a serializer/deserializer over a communication channel and activate, based on identifying the information to be received, both a transmission component and a reception component of the serializer/deserializer that are coupled with the communication channel.

A method for enabling enable use of multiple active paths for TDM traffic over a packet switched network, comprises: receiving at least two copies of a replicated packet including TDM information via at least two paths through the packet switched network, the at least two copies of the replicated packet including at least a first copy of the replicated packet received via a first of the at least two paths, and a second copy of the replicated packet received via a second of the at least two paths; selecting a copy of the replicated packet from among the at least two copies of the replicated packet; inputting the selected copy of the replicated packet to a jitter buffer; discarding unselected ones of the at least two copies of the replicated packet; and outputting the selected copy of the replicated packet from the jitter buffer to a TDM endpoint device.

A method for switching clock sources is provided. In the method, Precision Time Protocol, PTP, packets are monitored using each of PTP ports which connect to a new grandmaster (401). A frequency and a phase for the PTP port are calculated based on the PTP packets (402). In response to a successful check for the frequency and the phase, the PTP port is added to a candidate list (403). A phase calibration and a phase stability check may be introduced prior to the alternate BMCA.

Methods, systems, and devices for techniques for enabling and disabling of a serializer/deserializer are described. In some examples, a system may be configured to identify information to be transmitted by a serializer/deserializer over a communication channel and activate, based on identifying the information to be transmitted, both a transmission component and a reception component of the serializer/deserializer that are coupled with the communication channel. Additionally or alternatively, in some examples, a system may be configured to identify information to be received by a serializer/deserializer over a communication channel and activate, based on identifying the information to be received, both a transmission component and a reception component of the serializer/deserializer that are coupled with the communication channel.

A radio receiver device comprises an analogue-to-digital converter clocked by a first clock signal which receives a radio signal. A digital circuit portion receives a digital signal produced by the analogue-to-digital converter and comprises digital processing units clocked by a second clock derived from the first clock and which produce an output signal at an output sample rate. A counter clocked by the second clock counts samples at the output sample rate. A network timer clocked by a reference of a network clock produces a receiver enable flag synchronised to the first clock. The counter is enabled when the flag is set and sets a trigger flag when the count exceeds a predetermined threshold. A buffer receives the output signal and is enabled when the trigger flag is set.

A method for switching clock sources is provided. In the method, Precision Time Protocol, PTP, packets are monitored using each of PTP ports which connect to a new grandmaster (401). A frequency and a phase for the PTP port are calculated based on the PTP packets (402). In response to a successful check for the frequency and the phase, the PTP port is added to a candidate list (403). A phase calibration and a phase stability check may be introduced prior to the alternate BMCA.

A radio receiver device, arranged to receive a radio signal modulated with a plurality of data symbols, comprises an analogue-to-digital converter that is clocked by a first clock signal and is arranged to receive the radio signal and produce a digital signal. A digital circuit portion, arranged to receive the digital signal produced by the analogue-to-digital converter, comprises digital processing units that are clocked by a second clock derived from the first clock and arranged to process the digital signal and produce an output signal at an output sample rate. A counter, clocked by the second clock, counts a number of samples at the output sample rate. A network timer clocked by a reference of a network clock produces a receiver enable flag which is synchronised to the first clock. The counter is enabled only when the synchronised flag is set. The counter is arranged to set a trigger flag when the number of samples exceeds a predetermined threshold. A buffer is arranged to receive the output signal and is enabled only when the trigger flag is set.

A radio communication repeater for operating in a Time Division Multiple Access radio communication system with a plurality of time slots to transmit packets. The repeater includes a transmitter to transmit a plurality of the packets in a transmit time slot assigned to that repeater and a receiver to receive a plurality of the packets from all other time slots of the TDMA radio communication system other than the transmit time slot assigned to that repeater. The repeater also includes a controller to process the received packets from all other time slots of the TDMA radio communication system other than the transmit time slot assigned to that repeater and, if the received packets have different recipient identifiers, to forward the received packets for transmission by the transmitter in the transmit time slot assigned to that repeater as a frame comprising a plurality of packets having different recipient identifiers.

A radio communication repeater for operating in a Time Division Multiple Access radio communication system with a plurality of time slots to transmit packets. The repeater includes a transmitter to transmit a plurality of the packets in a transmit time slot assigned to that repeater and a receiver to receive a plurality of the packets from all other time slots of the TDMA radio communication system other than the transmit time slot assigned to that repeater. The repeater also includes a controller to process the received packets from all other time slots of the TDMA radio communication system other than the transmit time slot assigned to that repeater and, if the received packets have different recipient identifiers, to forward the received packets for transmission by the transmitter in the transmit time slot assigned to that repeater as a frame comprising a plurality of packets having different recipient identifiers.

There is provided an information processing apparatus that readily supports to provide hardware resources for implementing ICT education in the field of education. The information processing apparatus includes a device information receiver that receives, via a network, device information for identifying a device connected to a portable terminal, an education application selector that selects, based on the device information, an education application to be provided to the device, and an education application provider that provides the education application to the device via the network and the portable terminal.