Abstract: A data transmission method, includes: receiving a data packet to be transmitted, the data packet to be transmitted including data to be transmitted and chip identification information; determining a target first peripheral component interconnect express (PCIE) physical layer port corresponding to the chip identification information from a plurality of first PCIE physical layer ports, the plurality of first PCIE physical layer ports and a plurality of chips being interconnected one to one; distributing the data packet to be transmitted to the target first PCIE physical layer port; and transmitting the data packet to be transmitted to a receiving chip through the target first PCIE physical layer port, the receiving chip being a chip interconnected with the target first PCIE physical layer port.

Abstract: An apparatus for time synchronization, configured in a current node, including a message receiving-processing module and a synchronous time determining module, in which an output end of the message receiving-processing module is connected to an input end of the synchronous time determining module; the message receiving-processing module is configured to receive a precision time protocol (PTP) message from a previous node and determine a target parameter according to the PTP message, and the target parameter is a relevant time parameter for representing a time difference between the current node and the previous node; and the synchronous time determining module is configured to determine a synchronous time point of the current node according to the target parameter.

Abstract: A data communication method includes: acquiring a data subscription list for defining a data transmission relationship between each first device and each second device in the vehicle; establishing, according to the data subscription list, an association between a transmission protocol of a first device and a transmission protocol of a second device having a data transmission relationship with the first device to generate a data distribution list for defining a data transmission requirement between the first device and the second device having the data transmission relationship with the first device; and when data transmitted from at least one first device is received, transmitting data of each of the at least one first device to a second device having a data transmission relationship with the respective first device according to a corresponding data transmission requirement of the data distribution list.

Abstract: A data transmission method, includes: receiving a data transmission request from a data initiating device; querying a first target physical address and a first target virtual address according to the data transmission request, in which the first target physical address is a physical address in the data initiating device for storing data to be transmitted and the first target virtual address is a virtual address for buffering the data to be transmitted; reading the data to be transmitted from the first target physical address to the first target virtual address by using a direct memory access technology; and transmitting the data to be transmitted from the first target virtual address to a data receiving device through a preset data transmission network.

Abstract: A method for determining ambient temperature of a device in a building control system. The method includes obtaining a measurement of ambient temperature from a first temperature sensor of the device and obtaining a measurement of temperature of a processing circuit of the device. These temperature measurements along with a brightness level of a display of the device and a state of a relay of the device are provided as input to a neural network. The neural network is trained to recognize these inputs in order to more accurately determine the ambient temperature of the device. The reading from the first temperature sensor may otherwise be inaccurate due to heat generated by electronic components of the device.

Abstract: A method in a heating, ventilation, or air conditioning (HVAC) system includes retrieving a control input from a remote computing system via a cellular network responsive to determining that a connection to a local wireless network cannot be established and generating a control signal for HVAC equipment based on the control input or generating a control signal for HVAC equipment by executing a backup control algorithm responsive to determining that a connection to a local wireless network cannot be established.

Abstract: A data communication method includes: acquiring a data subscription list for defining a data transmission relationship between each first device and each second device in the vehicle; establishing, according to the data subscription list, an association between a transmission protocol of a first device and a transmission protocol of a second device having a data transmission relationship with the first device to generate a data distribution list for defining a data transmission requirement between the first device and the second device having the data transmission relationship with the first device; and when data transmitted from at least one first device is received, transmitting data of each of the at least one first device to a second device having a data transmission relationship with the respective first device according to a corresponding data transmission requirement of the data distribution list.

Abstract: Provided is a method for building an urban canopy model based on tropical island climate characteristics. Adjacent regions are linked together, multiple streets of finite lengths within the regions affecting each other. Net radiation heat flux Q*=long-wave radiation+short-wave radiation. The tropical island urban canopy model considers the strong solar radiation and high temperature and high humidity climate characteristics of tropical cities and the influence of perennial monsoons on island cities, improves the methods of processing long-wave radiation flux, short-wave radiation flux, sensible and latent heat flux, street canyon wind velocity, heat storage flux, anthropogenic heat flux and horizontal heat flux on the basis of an urban canopy model, and has higher adaptability to the studies on the tropical island-type urban heat island effect.

Abstract: A heating, ventilation, or air conditioning (HVAC) system includes a headless thermostat device and an adapter unit. The headless thermostat device includes one or more circuits configured to receive a control input from a user device via a local wireless network and generate a control signal for HVAC equipment based on the control input. The adapter unit includes one or more circuit configured to receive the control signal from the headless thermostat device via the local wireless network and provide the control signal to the HVAC equipment for operation of the HVAC equipment in accordance with the control input.

Abstract: A power over Ethernet (PoE) device system for a building including building devices connected together and to a PoE source via a network. The PoE source is configured to provide each of the building devices with PoE. A first building device of the building devices includes a communication subsystem circuit configured to receive the PoE from the PoE source via one of the building devices, power the communication subsystem circuit using the PoE received from the PoE source via the one of the building devices, and communicate with the PoE source and the building devices via the network. The first building device includes a functional subsystem circuit configured to power the functional subsystem circuit using power received from a permanent power source of the building and control an environmental condition of the building using the power received from the permanent power source of the building.

Abstract: A method in a heating, ventilation, or air conditioning (HVAC) system includes retrieving a control input from a remote computing system via a cellular network responsive to determining that a connection to a local wireless network cannot be established and generating a control signal for HVAC equipment based on the control input or generating a control signal for HVAC equipment by executing a backup control algorithm responsive to determining that a connection to a local wireless network cannot be established.

Abstract: A thermostat gateway device includes one or more circuits configured to receive a control input from a user device or from a sensor device via a first frequency band of a local wireless network, generate a control signal for the HVAC equipment using the control input, and provide the control signal to the HVAC equipment via a second frequency band of the local wireless network to affect operation of the HVAC equipment.

Abstract: A heating, ventilation, or air conditioning (HVAC) system includes a headless thermostat device and an adapter unit. The headless thermostat device includes one or more circuits configured to receive a control input from a user device via a local wireless network and generate a control signal for HVAC equipment based on the control input. The adapter unit includes one or more circuit configured to receive the control signal from the headless thermostat device via the local wireless network and provide the control signal to the HVAC equipment for operation of the HVAC equipment in accordance with the control input.

Abstract: A method for determining ambient temperature of a device in a building control system. The method includes obtaining a measurement of ambient temperature from a first temperature sensor of the device and obtaining a measurement of temperature of a processing circuit of the device. These temperature measurements along with a brightness level of a display of the device and a state of a relay of the device are provided as input to a neural network. The neural network is trained to recognize these inputs in order to more accurately determine the ambient temperature of the device. The reading from the first temperature sensor may otherwise be inaccurate due to heat generated by electronic components of the device.

Abstract: A power over Ethernet (PoE) device system for a building including building devices connected together and to a PoE source via a network. The PoE source is configured to provide each of the building devices with PoE. A first building device of the building devices includes a communication subsystem circuit configured to receive the PoE from the PoE source via one of the building devices, power the communication subsystem circuit using the PoE received from the PoE source via the one of the building devices, and communicate with the PoE source and the building devices via the network. The first building device includes a functional subsystem circuit configured to power the functional subsystem circuit using power received from a permanent power source of the building and control an environmental condition of the building using the power received from the permanent power source of the building.

Abstract: A method and system for providing header compression guidance to mobile devices initiating certain applications and/or protocols. A selective header compression (SHC) utility utilizes a session initiation protocol (SIP) message to provide robust header compression (ROHC) guidance to a mobile device initiating a call involving selected (SIP related) applications, protocols and/or service options. In addition, ROHC guidance allows the mobile device to appropriately select the source and/or destination port (depending on packet origination) for data flows requiring ROHC. ROHC guidance may recommend that the mobile device request ROHC for VoIP flows, but not for video flows. Furthermore, the guidance may specify the range of real-time protocol (RTP) ports at which ROHC is applied. For example, within a specified range of RTP ports, ROHC may be applied to data transmissions via even port numbers but prevented for real-time transport control protocol (RTCP) flows via odd port numbers.

Abstract: In mobile IP wireless data networking, methods are described for correctly routing packets through a foreign agent to or from wireless nodes where the wireless nodes have the same home network IP address. Instead of using normal IP routing, the foreign agent uniquely identifies the wireless node's home network IP address and home agent IP address with a PPP link address associated with a PPP link between the foreign agent and the wireless node. This association between PPP link addresses, home agent IP addresses, and home network IP addresses, is preferably implemented in software as a table stored in the foreign agent. The routing of packets through the foreign agent to the mobile nodes is performed by reference to the table. The table allows the foreign agent to correctly and efficiently route packets in the situation where multiple wireless nodes are registered with the foreign agent, but more than one of the wireless nodes have the same home network IP address.

Abstract: In mobile IP wireless data networking, methods are described for correctly routing packets through a foreign agent to or from wireless nodes where the wireless nodes have the same home network IP address. Instead of using normal IP routing, the foreign agent uniquely identifies the wireless node's home network IP address and home agent IP address with a PPP link address associated with a PPP link between the foreign agent and the wireless node. This association between PPP link addresses, home agent IP addresses, and home network IP addresses, is preferably implemented in software as a table stored in the foreign agent. The routing of packets through the foreign agent to the mobile nodes is performed by reference to the table. The table allows the foreign agent to correctly and efficiently route packets in the situation where multiple wireless nodes are registered with the foreign agent, but more than one of the wireless nodes have the same home network IP address.

Abstract: A mobile Internet Protocol service provider system implements home agent functionality in two separate devices. One device, the home registration agent, is devoted to registration of the mobile node and session control. The other device, the home tunneling agent, is devoted to tunneling and routing functions for the foreign agent. The home registration agent can be a general purpose computer. The home tunneling agent is preferably implemented in a robust routing device, such as an IP switch or router. Multiple home tunneling agents or home registration agents can be implemented in the respective devices as multiple instantiations of a home registration agent or home tunneling agent software program. Foreign agent functionality for mobile IP networking can also be split into separate devices.

Abstract: An apparatus and method for routing data packet connection pathways. A pathway controller monitors all of the packet data service nodes available for the transmission of data packets to mobile nodes in order to allocate the service nodes appropriately. A main call processing node selects an available packet data service node for use for a mobile node based upon the availability of the service nodes. A mobile node may have its data packet pathway deactivated if the network infrastructure determines the need to free-up resources for other mobile nodes. The data packet pathway may be reactivated upon the event of a new data packet arriving for the mobile node. The methods of deactivation and reactivation may be used to solve data packet pathway serving faults. The data packet connection pathways that may be reactivated may be done in a load balanced fashion.