Input/output (I/O) operation requests from pageable storage mode guests are interpreted without host intervention. In a pageable mode virtual environment, requests issued by pageable storage mode guests are processed by one or more processors of the environment absent intervention from one or more hosts of the environment. Processing of the requests includes manipulating, by at least one processor on behalf of the guests, buffer state information stored in host storage. The manipulating is performed via instructions initiated by the guests and processed by one or more of the processors.

A time synchronization method includes receiving, by a receive-end device, a first timestamp and a first header signal sent by a transmit-end device, where the first timestamp indicates a first moment at which a first channel medium conversion module sends the first header signal, and a second moment at which the receive-end device receives the first header signal. The method further includes sending a second header signal to the transmit-end device, where a third moment at which the receive-end device sends the second header signal. The method further includes receiving a fourth timestamp sent by the transmit-end device, where the fourth timestamp indicates a fourth moment at which the transmit-end device receives the second header signal. The method further includes synchronizing time with the transmit-end device based on the first moment, the second moment, the third moment, and the fourth moment.

A location awareness system including a communication network, and a network operating element coupled to the communication network. At least one anchor network gateway is coupled to the communication network, the at least one anchor network gateway configured to generate a wireless anchor network. A plurality of anchors are configured to couple to one of the at least one anchor network gateway via its respective wireless anchor network. A plurality of tags is each configured to communicate with at least one anchor to provide ranging information for determination of a position of the tag within an area covered by the system.

Techniques are described to provide for re-timing a packetized radio flow to clean noise induced by packet delay variation of a packet network. In one example, a method includes receiving, at a first node of a fronthaul network, a Radio over Ethernet (RoE) frame transmitted by a second node in which the RoE frame comprises a Common Public Radio Interface (CPRI) bit stream associated with a first radio device, a sequence number, and a first time stamp. The method may further include generating a second time stamp by the first node upon obtaining the RoE frame; calculating an induced delay value based, at least in part, on the first time stamp and the second time stamp; calculating a re-timing value based on a re-timing interval and the induced delay value; and transmitting the CPRI bit stream to a second radio device based on the re-timing value.

A transport network (20) is connected to a first wireless base station (3, 4) and to a second wireless base station (6). The first wireless base station comprises a remote radio unit (3) and a baseband processing unit (4) which are connected by the transport network (20). A node (16) of the transport network (20) receives a synchronous time division multiplexed communication signal which carries at least a first communication signal between the baseband processing unit (4) and the remote radio unit (3). The node (16) determines a frequency synchronisation signal from the synchronous time division multiplexed communication signal. The node (16) transmits the synchronous time division multiplexed communication signal to the remote radio unit (3) of the first wireless base station. The node (16) transmits the frequency synchronisation signal to the second wireless base station (6). The node (16) also assists with providing phase/time synchronisation to the second wireless base station (6).

A system, method and computer product for performing a time synchronization between first and second nodes includes the first node performing: generating a synchronization message, transmitting the synchronization message to the second node at a first time, taking a first timestamp in response to the synchronization message being transmitted and transmitting a timestamp message including the first timestamp to the second node at a second time; and the second node performing: receiving the synchronization message and the timestamp message from the first node, taking a second timestamp in response to the synchronization message being received, receiving the timestamp message from the first node, obtaining the first timestamp based on the received timestamp message, obtaining a timing offset between the first timestamp and the second timestamp and performing a time synchronization to the first node based on the timing offset.

A real-time Ethernet (RTE) protocol includes start-up frames originated by a master device for network initialization including a preamble, destination address (DA), source address (SA), a type field, and a status field including state information that indicates a current protocol state that the Ethernet network is in for the slave devices to translate for dynamically switching to one of a plurality of provided frame forwarding modes. The start-up frames include device Discovery frames at power up, Parameterization frames that distribute network parameters, and Time Synchronization frames including the master's time and unique assigned communication time slots for each slave device. After the initialization at least one data exchange frame is transmitted exclusive of SA and DA including a preamble that comprises a header that differentiates between master and slave, a type field, a status field excluding the current protocol state, and a data payload.

The invention is adapted to acquire more useful log data. A master device (4) includes a timer element (45), adapted to acquire a moment; an instruction sending element (421), adapted to synchronize a moment measured by a slave timer element (14) of slave devices (1-3) with a moment acquired by the timer element (45) according to a time synchronization instruction containing moment information corresponding to the moment acquired by the timer element (45); and a slave log receiving element (423), adapted to receive slave logs (131).

A network element includes a port; and a device with circuitry configured to encode data for communication to a second device via a plurality of physical channels, and utilize one of the plurality of physical channels as a dedicated timing channel with encoding thereon different from encoding on the other plurality of physical channels, and interface encoded data via the plurality of physical channels with the port for transmission and reception with a second device.

A location awareness system including a communication network, and a network operating element coupled to the communication network. At least one anchor network gateway is coupled to the communication network, the at least one anchor network gateway configured to generate a wireless anchor network. A plurality of anchors are configured to couple to one of the at least one anchor network gateway via its respective wireless anchor network. A plurality of tags is each configured to communicate with at least one anchor to provide ranging information for determination of a position of the tag within an area covered by the system.