36results about How to "Reduce the possibility of packet loss" patented technology

The embodiment of the invention discloses a flow distribution method and device. The method comprises the following steps: calculating the first packet loss rate of a first forwarding tunnel within the preset cycle by a first network node; when the first packet loss rate is smaller than a first preset threshold value, reducing the rated bandwidth of the first forwarding tunnel by a first preset bandwidth to obtain a first available bandwidth; when the forwarding flow of the first forwarding tunnel exceeds the first available bandwidth, distributing the exceeded forwarding flow to a second data link for forwarding. According to the method, the available bandwidth of the first forwarding tunnel is reduced to be the first available bandwidth by the first network node when the packet loss rate of the first forwarding tunnel is relatively high; as the first available bandwidth is smaller than the original available bandwidth of the first forwarding tunnel, the forwarding flow can early exceed the first available bandwidth, the flow distribution opportunity of the first network node is advanced, and the serious packet loss possibility before flow distribution is reduced.

The invention discloses a message transmission method and device. The message transmission method comprises the following steps: judging whether the length of the message to be transmitted is more than the preset EAP Message MTU value, and transmitting the message to be transmitted by adopting the TCP (transmission control protocol) transmission form if the length of the message to be transmitted is more than the preset EAP Message MTU value. The message transmission method and device solve the problem in the prior that the UDp (user datagram protocol) connection authentication process can lead to low authentication success rate.

The invention belongs to the technical field of equipment maintenance or management, and discloses an aircraft formation hierarchical network access management method and system. The management methodincludes the following steps: initializing aircraft formation network parameters; identifying aircraft node capability state information; defining node comprehensive property parameter indexes by using the node capability state information; constructing a whole network node capability visibility graph according to the comprehensive property parameter indexes; selecting a formation network accessinitiation node according to the consideration of the node capability visibility graph and the geographical location area; completing control information interaction between the network access initiation node and a main topology central control node according to the principle of minimum hop count and a sleep state multipath way-finding mode based on geographic location information; and carrying out information in a formation after the network access initiation node receives network access response so as to make the nodes update a local information field to finish the formation network access.According to the invention, maximum network access efficiency is obtained with lowest cost, the comprehensive performance of formation network access is improved, network communication QoS needs are guaranteed, and the task completion efficiency and quality are improved.

The embodiment of the invention provides a system maintenance method and network switching equipment, which is used for avoiding connection of heartbeat lines, reducing loss of heartbeat data packets and realizing a cross-operating system HA scheme. The method comprises the steps that main working equipment is determined to break down if the network switching equipment is determined not to receive a heartbeat data packet sent by the main working equipment through a service link established between the main working equipment and the network switching equipment within a preset period of time; the network switching device receives a heartbeat data packet sent by standby working equipment through a service link established between the standby working equipment and the network switching equipment, and normally operating standby working equipment is determined according to the received heartbeat data packet; the network switching equipment determines standby working equipment used for replacing the main working equipment from the normally operating standby working equipment; and the network switching equipment sends service data to the standby working equipment used for replacing the main working equipment.

The invention provides a TCP congestion control method and device. The method comprises the following steps: when determining that a current round-trip delay RTT is terminated and determining that a congestion state machine is in an Open state, determining a RTT value of a current RTT period and a congestion window of the current RTT period; determining a current RTT minimum value according to the RTT value of the current RTT period and a historical RTT minimum value; determining a RTT average value of the current RTT period according to the RTT value of the current RTT period, the congestion window of the current RTT period and a historical RTT average value; determining an expected congestion window according to the current RTT minimum value, the RTT average value of the current RTT period and the congestion window of the current RTT period; and determining the congestion window of the next RTT period according to the expected congestion window and the congestion window of the current RTT period. By adopting the method provided by the invention, the determined congestion window of the next RTT period can be more accurate and reliable.

The embodiment of the invention provides a data flow routing method and device. The method comprises the steps of receiving a congestion notification message sent by a first Spine device, sending thecongestion notification message when the first Spine device detects that an outlet port forwarding a target data flow is congested, and the congestion notification message carries a flow identifier ofthe target data flow, an outer-layer target IP address and a rate; sending a bandwidth query message carrying the outer-layer destination IP address to each second Spine device, so that each second Spine device determines the residual bandwidth of an output port corresponding to the outer-layer destination IP address, carries the residual bandwidth in a bandwidth notification message and sends the bandwidth notification message to the first Leaf device; and receiving a bandwidth notification message sent by each second Spine device, and determining one second Spine device of which the residual bandwidth is greater than the rate of the target data flow as a next hop device for sending the target data flow. The possibility of data flow packet loss caused by congestion of the data flow can be reduced.

A method and apparatus for switch between master and standby links are provided in embodiments of that present application, the method comprises obtaining an operating channel of a neighboring trackside AP of the primary trackside AP from the primary trackside AP after determining the primary Mesh link, determining a standby working channel according to the standby radio frequency unit and the acquired working channel, switching the working channel of each standby radio frequency unit to a standby working channel, and establishing a standby mesh link through the standby radio frequency unit. When a Mesh link handoff is required, a Mesh link satisfying a preset condition is determined from the established standby Mesh link, and the determined Mesh link is switched to a primary Mesh link. The wayside AP in the embodiment of the present application adopts multi-channel deployment, which improves the utilization rate of channel resources. The on-board AP establishes a backup Mesh link based on the backup working channel, and switches the primary and standby Mesh links when the Mesh link needs to be switched, which reduces the possibility of packet loss.

The embodiment of the invention discloses a data processing method and device. The data processing method comprises the following steps: monitoring the quality of a radio link; and when the quality ofthe radio link is lowered, reducing sending rate of an RLC (Radio Link Control) layer. According to the data processing method disclosed by the embodiment of the invention, when the quality of the radio link is lowered, the sending rate of the RLC layer is reduced, thereby correspondingly slowing down scheduling of data of a TCP (Transmission Control Protocol) layer or IP (Internet Protocol) layer by the RLC layer, then indirectly adjusting a real-time rate of the TCP layer to ensure that the quality of the radio link is in a relatively good state and further improving the performance of a TCP congestion control mechanism; and therefore, the transmission performance is improved.

The invention discloses a method and device for establishing a multicast forwarding table entry in a bidirectional protocol independent multicast (PIM) network. In the method, a directly-connected device of a bidirectional PIM multicast source receives first protocol messages from the multicast source aiming at a multicast group G; a table entry (*,G) is established in accordance with the protocol messages; an outbound interface of the table entry is the RPF interface of the directly-connected device, and second protocol messages are sent from the RPF interface along an RP direction; the second protocol messages are used for indicating upstream equipment to establish a table entry (*,G), and an outbound interface of the table entry is the RPF interface of the upstream equipment; and the first protocol messages are sent before the bidirectional PIM multicast source sends multicast streams aiming at the multicast group G. According to the method and device provided by the invention, the bidirectional PIM forwarding efficiency is improved.

The embodiment of the invention provides a data communication method, control equipment and nodes, and relates to the communication field. While message transmission is finished, the message packet loss possibility is reduced, and the success rate of message transmission is improved. According to the concrete scheme, a message transmission path is obtained, operation of issuing corresponding flow table items to the nodes on the path at the same time is carried out, whether operation of issuing the corresponding flow table items to the nodes on the path at the same time is successful or not is judged, if operation fails, the step of obtaining the message transmission path, the step of issuing the flow table items to the nodes at the same time and the step of judging whether issuing is successful or not are carried out again until all the nodes successfully receive the corresponding flow table items, and if operation succeeds, flow table item triggering information is issued to a head node, the head node is indicated to carry out the received flow table item, and therefore all the nodes transmit messages according to the received corresponding flow table items. The data communication method, the control equipment and the nodes are used for data communication.

The embodiment of the invention discloses a data transmission method and communication equipment. The method provided by the embodiment of the invention comprises the following steps: the communication equipment acquires dequeue information; wherein the dequeue information indicates a queue requested to be output in the communication equipment and a target data volume output by each queue at a time; The communication device maintains a burst value. the target data volume is managed based on the burst value; wherein the target data volume is not greater than the burst value; the communication equipment reads a sub-packet descriptor PD according to the queue; wherein the sub-PDs are obtained by segmenting a first PD; wherein the sub PD comprises target description information used for indicating a target data packet; wherein the first PD comprises first description information used for indicating a first data packet set; wherein the first data packet set comprises a target data packet, the first data packet set and the sub-PD are stored in a packet cache, the packet cache comprises a dynamic random access memory (DRAM), the first PD is stored in a control cache, the control cache comprises a static random access memory (SRAM), and the communication equipment determines and sends the target data packet according to the sub-PD.

The invention discloses a wireless surveying and mapping data transmission method. After first surveying and mapping data and second surveying and mapping data of a first surveying and mapping label are obtained, the first surveying and mapping data and the second surveying and mapping data can be processed to obtain third surveying and mapping data and target surveying and mapping state information of target surveying and mapping region content; since the third surveying and mapping data integrates the surveying and mapping weather information of the first surveying and mapping data and the surveying and mapping step length information of the second surveying and mapping data, the possibility of packet loss during data transmission can be reduced. In addition, a fragment corresponding to the target surveying and mapping state information is intercepted from the second surveying and mapping data to obtain first fragment surveying and mapping data of the first surveying and mapping label, and the first fragment surveying and mapping data is optimized to obtain fourth surveying and mapping data, so that the surveying and mapping state of the second surveying and mapping data can be analyzed and considered, and the surveying and mapping efficiency is improved when the third surveying and mapping data and the fourth surveying and mapping data are transmitted. Data integration and surveying and mapping state analysis can be considered, so that missing of surveying and mapping data in a transmission process is avoided.