86 results about "Data Link Control" patented technology

A Data Link Control protocol for 3G wireless communication system for direct support for network layer protocols, e.g. the Internet Protocol (IP), is provided. The Link Layer disclosed comprises a Link Access Control (LAC) sublayer and a Medium Access Control (MAC) sublayer. At a transmit end of the wireless system, a plurality of Quality of Service (QoS) data planes are created to directly support the IP QoS. Each QoS data plane is optimized to handle QoS requirements for a corresponding Class of Service (CoS). Data packets received at the LAC sublayer are directed to a QoS data plane according to the particular QoS information they contain and processed according to the particular QoS requirement to generate variable size LAC frames. The variable size LAC frames are transmitted to the MAC sublayer for generating radio link protocol data units (RLP PDUs) to be transmitted to a receiving end. A new level of error correction is provided at the LAC sublayer as the size of the LAC PDUs can be dynamically adjusted in response to the conditions of the communication link. A dual mode ARQ is provided at the MAC sublayer to improve the quality of the air transmission for bursty as well as non-bursty traffic conditions.

A comprehensive user control system for use with therapeutic wellness devices is described, comprising such a wellness device, data equipment capable of connection to a data communications network, and a removable data link capable of permitting data communication between the wellness device and data equipment. Other embodiments comprise a general purpose computer capable of connection to a data communications network and programmed to control a wellness device across a removable data link; a method of controlling a wellness device including obtaining over certain data communications connections a program for controlling the device and operating the device in accordance with the program; and a method of controlling a wellness device comprising presentation of a request for therapeutic relief not specifying a particular mechanical action to be performed by the device, and translation of that request into at least one command executable by at least one wellness device.

A Multiservice Access Concentrator (MAC) provides a time limit for a first ringing voltage signal in response to an attempted call. The call is attempted via a voice over packet-data-network system (VOPS), wherein the VOPS comprises voice over Internet Protocol (IP), voice over Frame Relay, voice over Asynchronous Transfer Mode (ATM), and voice over High-level Data Link Control (HDLC) network systems. Generation of the first ringing voltage signal is terminated upon expiration of the time limit. A control message is transmitted to terminate the attempted call, wherein the control message is transmitted via the VOPS.

The invention relates to an air-ground data link control management method which comprises the course of the link initialization of an airplane and a ground system, the establishment of the initialization link of the airplane and a ground station, an automatic tuning method of a ground base system and the multi-state link switching course, wherein the course of the link initialization of the airplane and the ground system comprises the following steps: the airplane searches in a public signal frequency band and the frequency band with service priorities, and the ground station also sends a ground broadcast frame in the present service frequency band and the public signal frequency band; the multi-state link switching course comprises the following steps: according to differences of switching control weights of the airplane and the ground station, if the ground system is required to be switched, and an airplane terminal has switching and initialization functions, the switching course of ground base requirements and airplane initialization is carried out, and if the airplane terminal is required to be switched and the ground station has switching and initialization functions, the switching course of air plane requirements and ground initialization is carried out. The flexible and automatic control and the link management with no gap switching of the airplane and the ground station can be guaranteed.

The present invention discloses a method and device for bandwidth dynamic regulation for HDLC channel. A HDLC treating unit in the initiating side receives a HDLC frame according to the mapping arrangement information of the time interval channel in the receiving direction, and sends a regulation notice of the channel; a HDLC collocating management unit in the response side makes over the mapping arrangement information of the time interval channel in the receiving/sending direction of this terminal according to the obtained regulation notice of the channel, a HDLC treating unit in the response side receives and sends the HDLC frame with basis of the mapping arrangement information of the time interval channel in the receiving/sending direction, and sends a regulation response of the channel; a HDLC collocating management unit in the initiating side makes over the mapping arrangement information of the time interval channel in the receiving direction of this terminal according to the obtained regulation response of the channel, a HDLC treating unit in the initiating side sends the HDLC frame with basis of the mapping arrangement information of the time interval channel in the sending direction. The negotiation about HDLC channel bandwidth regulation between the two sides is accomplished by controlling frame alternation.

Methods and apparatus are described for a data link control layer of a communication modem in which data movement functionality is implemented in hardware. In one embodiment, a data link layer comprises software, memory and hardware. The software comprises a processor configured to receive control signaling from a host device and provide control information to the hardware. The hardware comprises an outbound memory manager configured to receive data from the host device, determine locations in the memory for the data, store the data in the memory, determine which of the data is to be forwarded to a physical layer during a given transmit period, and forward the data to the physical layer. In preferred embodiments, the modem is a high performance modem designed for the terminals of a wireless local area network having multiple data flows, segmentation and reassembly, encryption, automatic repeat request, and quality of service requirements.

A data link control device which is implemented in a Layer 2 Protocol of a subscriber unit in order to establish and maintain data link between the subscriber unit and a radio port. In which, the Layer 2 Protocol is located between a physical layer and a Layer 3 Protocol. The data link control device comprises a media access control module, a state control module and a data processing module. The media access control module transmits and receives data between the subscriber unit and the radio port. The state control module controls and manages the flow of states of the subscriber unit. States in the state control module can be classified as Off State, Acquiring State, Standby State, and Active State. According to system information channel (SIC) message and alerting channel (AC) message received, or requests from the state control module, the data processing module carries out corresponding actions to the state control module. Also, the data processing module uses acknowledged mode transfer (AMT) communication protocol and through the media access control module, uplinks and downlinks information to and from a radio port control unit, in order to transmit information of Layer 3 Protocol between the subscriber unit and the radio port control unit. In which, the AMT communication protocol instructs the information receiver to feed back the correctness of the information transmitted.

An application specific integrated circuit (ASIC) is provided to a vehicle diagnostic tool that includes a power supply module, a keyboard interface, an oscillator, a microcontroller, a vehicle data link controller, a vehicle interface, a display controller and a memory interface. The ASIC allows for better control of components that are parts of the vehicle diagnostic tool including performance and compatibility.

This invention relates to a HDLC protocol receiving process module and its data process method, in which, the module is composed of a port arbitration module, a receiving HDLC protocol processor and a module of state memory. The data process method is that N-port shared data process pipelines provide arbitration to the port arbitration module and send data to be processed to the receiving HDLC protocol processor orderly according to priorities which reads out the state data of its belonged HDLC channel from the state memory module to be processed in pipeline and write back the new state data to the memory. Using one parallel HDLC protocol receiving processor to process all port data streams.

In a data processing system including a plurality of digital signal processor subsystems, selected peripheral components are shared by the digital signal processor subsystems. In particular, the high level data link controller is shared by the subsystems. Using a first interrupt signal after each transfer of signal groups from the peripheral direct memory access unit, the data can be efficiently transferred from a channel memory of the peripheral direct memory access unit to the high level data link controller. A second interrupt from the high level data link controller when a last word of a packet is transferred thereto causes a new channel memory to be accessed.

A system for use in nodes communicating over a CPRI (common public radio interface) allows each networking node in a daisychain configuration to seamlessly manage the control and management HDLC (high-speed data link control) channel for both uplink and downlink. The connection is kept alive through a soft reset flow. Received HDLC packets can be extracted for use by a local node. Locally generated packets can be inserted into the packet data stream at the datalink layer for onward transmission over the CPRI. The system arbitrates between the locally generated packet data held in a buffer in the local node and remote packet data received from a remote node and held in the local node in a first in first out buffer for onward transmission to a subsequent node after arbitration. Remote packet data is given priority.

The invention discloses a page-turning service-oriented data table control and an implementation method thereof. The control comprises a data display unit, a page turning control unit, independent data exchange middleware and a service integrating unit, wherein the data display unit sets a row and column-based data collection display mode; the page turning control unit displays a data collection of a large number of data on the basis of fixed page volume and receives and executes a page turning control command; the independent data exchange middleware sets a data storage format; and the service integrating unit accesses to services with a specific structure through the data exchanger middleware and display data. The implementation method comprises: 1) defining the data display unit; 2) defining the page turning control unit; 3) defining the data exchange middleware; 4) defining the service integrating unit; and 5) displaying the table on an interface. The control and the method allow a user to acquire a page-turning display effect on return data of specific services by using simple configuration and greatly reduce a large amount of repeated work for acquiring the service-oriented data page-turning display effect in software design.

The invention relates to a method, a system and a handheld device for integrally controlling multiple electrical adjusting antennas. Every electrical adjusting antenna in the system has a unique serial number and the handheld device identifies every electrical adjusting antenna according to the serial number and sets HDLC (High Data Link Control) addresses to control. According to the method, the system and the handheld device for integrally controlling the multiple electrical adjusting antennas, control and inquiry of multi-electrical-adjusting antennas, single-electrical-adjusting antennas or a plurality of cascaded single-electrical-adjusting antennas and multi-electrical-adjusting antennas can be conveniently and rapidly performed, and the problems that exterior base station devices or manual adjustment are inconvenient are solved. Compared with a cascaded control method of a plurality of single-electrical-adjusting-antennas in the prior art, the method for integrally controlling multiple electrical adjusting antennas enables control of the multiple electrical adjusting antennas to be convenient through the handheld device, the antenna structure of the system is simple and the handheld device is small in size, simple to operate and low in production cost.

The invention discloses a method for accessing a user end to next generation network, the method comprises the following steps: hypothesizing a U interface card into an Ethernet network card, receiving Ethernet frame which is transferred from a TCP/IP protocol layer, step S104, removing Ethernet frame head and exchanging the Ethernet frame head into an IP data packet, and analyzing IP data packet types, step S106, accessing getaway and receiving data packet from high-grade data link control 2B+D channel, checking the IP data packet, exchanging network address for the IP data packet which is checked, and step S 108, packing the exchanged IP data packet into an Ethernet frame format and sending to soft exchanging core network server. The invention also discloses a system which accesses a user side to a next generation network. The invention achieves the safe and stable transmission of information in different networks under the circumstance without needing to modify any user end application program which is based on TCP/IP communication, which reduces the probability of core switching network service period which is attacked, and lowers complexity of important customer system network building.

A system, method and computer program product are provided for correlating request packets and reply packets during network analysis. Initially, first information is monitored associated with at least one layer of a request packet that resides above a data link control layer thereof. Further monitored is second information associated with at least one layer of a reply packet that resides above the data link control layer thereof. The request packet and the reply packet are then correlated utilizing the first information and the second information. A network is then analyzed based on the correlated request packet and reply packet.

Provided is a communication control method in a mobile radio system in which a transmission side radio communication device is connected to a reception side radio communication device via radio propagation path. A parameter for data link control is set in the transmission side radio communication device and the reception side radio communication device. The set parameter such as a parameter of a layer is modified by using a state change of the radio propagation path as a trigger.

This invention relates to a kind of device of realizing high-level data link control. It includes: bus interface module that has outer interactive function through advanced high-performance bus, HDLC processing lane that connects with stated bus interface module. The stated HDLC processing lane includes core processing module and core control module, the stated core control module controls core processing module according to peripherals DMA request and reads data form peripherals to have HDLC processing through bus interface module. After the completion of core processing module handle, it informs related peripherals or CPU to read the completed data. This invention also provides a corresponding high-level data link control method. Through the providing DMA data movement function in the HDLC processing of this invention, it reduces CPU load and saves CPU processing resource.

The invention relates to a DLC (Data Link Control) optical fiber connector assembly and a plug thereof. The outer circumferential surface of an inner shell of the plug is provided with an elastic jaw which faces to the front end and is provided with a locking block at the front end head, a DLC plug module can be slidably arranged in an inner hole of the inner shell through a fixed plate fixed on the DLC plug module, the front end face of the fixed plate is in blocking matching with an inner convex baffle plate of the inner shell, the rear end face of the fixed plate is in elastic matching with a blocking step surface at the rear end of the inner shell through a thrust spring, an outer shell is sleeved on the periphery of the inner shell, the locking block of the elastic jaw is arranged in a locking hole of the outer shell and protrudes out of the outer circumferential surface of the outer shell, the front end of the inner hole of the inner shell is provided with a strip-shaped tongue piece arranged along the axle line of the inner shell, the outer surface of the strip-shaped tongue piece is attached on the wall of the inner hole of the inner shell, the inner surface of the strip-shaped tongue piece is used for pushing a duplexing clamp of the DLC plug, the strip-shaped tongue piece is fixedly arranged on the outer shell through the front end thereof, and the circumferential surface of the inner hole of the inner shell is provided with a pushing step for pushing the strip-shaped tongue piece to face to the front end when the outer shell drives the strip-shaped tongue piece to move backwards at the rear end head of the strip-shaped tongue piece.

The invention discloses a method of preparing biology activity composite thin film on surface of titanium alloy. Specifically, the titanium alloy which is processed before the convention is placed in a multi-sphere ion plating-magnetic control sputtering composite gas phase sedimentation vacuum system. A data link control (DLC) thin film with Ti as a transition layer is sedimentated. The composite thin film is composed of a titanium alloy base body, the DCL thin film and a casein phosphoric acid peptide activity egg white surface layer in sequence. A series of excellent qualities of the titanium alloy as the base body material are maintained by the thin film. The biology activity and the tribology performance are improved.

The invention discloses a method for implementing XML data information exchange, which comprises the following steps of: defining an XML information packet into two parts, namely an information packet head and service data, wherein the information packet head at least comprises source address ID and destination address ID information; embedding the XML information packet into an information field part for link layer protocol-high data link control (HDLC); establishing a correspondence list between the source address ID and destination address ID information which is contained in the XML information packet head and address information in an HDLC frame structure, and filling an address field in the HDLC frame structure according to the correspondence list so as to form an HDLC frame; and establishing virtual connection corresponding to the XML source address ID and destination address ID and the HDLC address through selected time slots, and implementing the XML data information exchange by using a time division switching mode. The technical scheme of the invention provides a favorable way for hardware of information exchange technology in the electronic commerce and promotes the popularization and application of the electronic commerce.

The invention relates to the technical field of field buses, and specifically provides a mixed-protocol two-stage topological structure based field bus system and a construction method thereof. The system is that a first-stage bus structure is a bus type topological structure formed by a Nic-Net main station and a Nic-Net main slave station through a first-stage bus Nic-BUS; a second-stage bus structure is a star shaped topological structure formed by a Nic-Net main slave station and a Nic-Net secondary slave station through a second-stage bus NicLink; the Nic-Net main station comprises a bus application layer, a data link layer and a physical layer; the first-stage bus NicBUS adopts time determination data link control protocol; the Nic-Net main slave station comprises a NicBUS slave station and a NicLink main station; the Nic-Net secondary slave station comprises a bus application layer, a data link layer and a physical layer; two layers of buses NicLink between the Nic-Net main slave station and the Nic-Net secondary slave station adopts the time determination data link control protocol. According to the system, the field bus has the advantages of being high in real-time response performance and high in reliability, and supporting expandability of heterogeneous field buses; the topological structure has the characteristics of being clear in layers, and combining the advantages of the bus type and star type structures.

The invention discloses a convergent protocol converter and a transceiving method thereof for automatically recognizing high-level data link control (HDLC)/generic framing procedure (GFP) user side protocol converters. An HDLC/GFP automatic processing module is arranged between an ethernet data-caching module and a virtual concatenate (VCAT) and link capacity adjustment scheme (LCAS) module, thereby automatic HDLC and GFP framing/deframing of a local side single convergent converter is achieved, the transmission of information with multiple far-end single way, multiple ways, HDLC type or GFP type E1 protocol converters is achieved, by means of the mode, the automatic identification can be performed when the user side changes different types of protocol converters, and a system which is high in cost performance ratio and compatibility and convenient to install and maintain can be flexibly achieved.