A lease-based heartbeat protocol method is provided. The method may include sending a heartbeat request to a server device in a lease period, and receiving a heartbeat request response from the server device; and determining a retry sending at adaptive interval in response to the heartbeat request response being abnormal, and sending a retry heartbeat request to the server device again after the retry sending interval is past, until the lease period expires or a corresponding heartbeat request response is normal. As such, two successive retry heartbeat requests can be sent at a relatively large time interval at an initial stage of heartbeat request retry. At a later stage of the heartbeat request retry, the time interval associated with the retry heartbeat requests is reduced, such that re-sent heartbeat requests can be sent at a higher speed.

A method, a system, and a non-transitory storage medium provide an IP address and port-based identity service in which an anchor node of a wireless network stores identity information pertaining to a user of a mobile device in a centralized database. An authenticated and authorized web server may query the centralized database using the IP address or the IP address and port of an end device connected to the web server. The web server may obtain identity information pertaining to the user, such as a mobile telephone number.

Methods and apparatus for providing a messaging server within a premises device e.g., a home or enterprise gateway device. In one embodiment, a system is described that includes a premises device that acts as a centralized client messaging platform providing messaging services between a content provider and client devices, and also between client devices within a premises network. The premises device enables client-to-client communication that bypasses the long trip and propagation delay over the Internet by connecting the message across the premises network within the home or building. The premises device enables messages to be communicated between a content provider outside the premises network and the client devices via a single connection to minimize the number of Internet connections that need to be opened, and the number of messages communicated with servers outside of the premises network via both upstream aggregation and downstream dis-aggregation, which collectively save both network bandwidth and device reaction time.

Techniques for creating a persistent connection between client devices and one or more remote computing resources, which may form a portion of a network-accessible computing platform. This connection may be considered “permanent” or “nearly permanent” to allow the client device to both send data to and receive data from the remote resources at nearly any time. In addition, both the client device and the remote resources may establish virtual channels over this single connection. If no data is exchanged between the client device and the remote computing resources for a threshold amount of time, then the connection may be severed and the client device may attempt to establish a new connection with the remote computing resources.

A maintenance method for network connection and a computer system are provided. The method is adapted to a computer system having a real-time clock. The real-time clock is configured to regularly wake up the computer system to check whether a network connection is working normally. In the method, a wake up operation to wake up the computer system is received from a user. It is determined whether a connection time of maintaining the network connection so far from a last time of entering a power saving mode is greater than a counting time for the real-time clock to wake up the computer system. It is tested whether the network connection is working normally when the connection time is greater than the counting time. The counting time of the real-time clock is updated to the connection time when the network connection is working normally.

To provide client-side fault-tolerance in a publish-subscribe system, a message is received on a channel from a server. At a function executing using a processor and a memory, a determination is made whether the message contains a heartbeat data. When the message contains the heartbeat data, a determination is made whether a content signature contained in the message matches a last known content signature saved from a previous message. When the content signature contained in the message does not match the last known content signature saved from a previous message, a refresh message is sent to the channel.

This disclosure provides a method, performed in a resource-constrained device 60, for establishing a secure session with a service 800 delivered by a server terminal 80 using a security protocol over a communication network. The resource-constrained device 60 is registered at a management terminal 70. The method comprises receiving, from the server terminal 80, a credential associated with the service 800. The method comprises sending, to the management terminal 70, a service approval request 803. The service approval request 803 comprises an identifier of the service 800 and/or the credential. The method comprises receiving, from the management terminal 70, a response 804. The response 804 comprises an indication that the service 800 is approved, and a security context for a resumption of the secure session. The secure session has been established by the management terminal 70. The method comprises initiating the resumption of the secure session with the service 800 using the security context.

Disclosed are a method and an electronic device for identifying a device. The method mainly includes: when starting an application program, obtaining a target file and a screen size of a device, wherein the target file is configured to record a wired Media Access Control (MAC) address of the device; and determining a device type of the device according to the target file and the screen size.

A heartbeat-based data synchronization method is disclosed. The method is applied to a distributed storage system, and at least one data block group is stored in the distributed storage system. The distributed storage system includes multiple storage devices, one device in the multiple storage devices is a primary device for storing the data block group, and other devices are secondary devices for storing the data block group. The primary device performs the method. The primary device obtains access status information of the data block group, determines a heartbeat time of the data block group according to the access status information of the data block group, and sends a data synchronization instruction to the secondary device according to the heartbeat time of the data block group, where the data synchronization instruction is used to instruct the secondary device to synchronize data.

It is provided a method, comprising detecting a request for establishing a session between a peer and a network, wherein the request is received from the peer and comprises an identifier of a user of the network; checking, if the request is detected, whether a first session is established, wherein the first session is a session of the user which is established between the peer and the network; determining, if it is checked that the first session is established, whether the first session is dead or alive; flushing the first session if it is determined that the first session is dead; triggering an establishment of the requested session if it is determined that the first session is dead.