161 results about "Link Control Protocol" 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 network access server providing remote access to an IP network for a remote client initiates a PPP connection for a remote client quickly, and without requiring re-negotiation of Link Control Protocols and Network Control Protocols. The network access server has a PPP session with the remote client go dormant, for example when the user is a wireless user and goes out of range of a radio tower and associated base station. The network access server does not get rid of the PPP state for the dormant session, but rather switches that PPP state to a new session, such as when the client moves into range of a different radio tower and associated base station and initiates a new active session on the interface to the wireless network. The switching of PPP states may be within a single network access server, or from one network access server to another. This "context switching" of the active PPP session allows the mobile user to seamlessly move about the wireless network without having to re-negotiate Link Control Protocols and Network Control Protocols every time they move out of range of one radio tower and into range of another radio tower.

A working router is coupled to a SONET add-drop multiplexor (ADM) through a working line and a protection router is coupled to the ADM through a protection line. The routers are coupled to each other by a separate side-band connection and comprise a virtual router from the perspective of the neighboring router, which communicates with the virtual router over the SONET network using the Point-to-Point Protocol (PPP). The protection router transmits a heartbeat message to the working router over the side-band connection. If the protection router does not receive a response thereto, it initiates a line switch within the add-drop multiplexor. Once the line switch is complete, the protection router exchanges datagrams with the neighboring router, via the ADM and SONET ring to which the ADM is coupled. The protection router establishes a PPP connection between itself and the neighboring router device coupled to the SONET ring, utilizing the Link Control Protocol (LCP). The protection router includes a predetermined identifier value that identifies the originator of the request, in the LCP Identifier field of LCP request datagrams. The neighboring router includes the Identifier value received in a request datagram in the corresponding response datagram transmitted over the SONET ring to the ADM. Because datagrams received by the ADM from the SONET link are transmitted over both the working and the protect lines, the working router receives the same response as the protection router. Thus, by examining the identifier field, and recognizing the identifier value as that assigned to the protection router, the working router determines that the line switch to the protection router has occurred.

The invention provides a system and method for transmitting data between a service gateway and relay terminals. The method comprises the steps of: establishing evolution global terrestrial radio access bearer connection between the relay terminals and the service gateway; forming extracted packet data convergence protocol service data units (PDCP SDUs) into packet data convergence protocol protocol data units (PDCP PDUs) and multiplexing the PDCP PDUs to form radio link control protocol data units (RLC PDUs) after an evolution node B of an application side receives data sent by the service gateway; multiplexing the RLC PDU of each relay terminal to form a relay medium access control protocol data unit (R-MAC PDU) and then sending the R-MAC PDU to a relay node; extracting each RLC PDU from the R-MAC PDU by the relay node; and multiplexing all the RLC PDUs of the same relay terminal to form a media access control protocol data unit (MAC PDU) and then sending the MAC PDU to the corresponding relay terminal. By adopting the invention, the aims of introducing the relay node, reducing the cost and improving the efficiency are realized.

The invention discloses an automatic repeat request (ARQ) window management method which is characterized in that receiving terminals of layer entity are controlled by use of wireless links of confirmation mode; and when the sections of the wireless link control protocol data cell corresponding to the lower boundary of the currently-received window or all the wireless link control protocol data cells are not received successfully and the preset conditions are met, the receiving window are triggered to move continuously. The ARQ window management method overcomes the problems of wireless resource waste and unfairness when the service data unit (SDU) is discarded, and avoids the complexity of sending the move receiving window (Send MRW).

The disclosed method is in use for solving issues existed in current technique that overhead of media access control protocol data unit (MAC PDU) in use for transmission is quite larger; and resource waste is caused by MAC PDU unable to carry wireless link control protocol data unit (RLC PDU) and MAC PDU at same time. Following format is accepted in the method: MAC PDU includes MAC head field and MAC load field are pointed to each logic channel of transmitting RLC PDU; the MAC head field includes a logic channel ID field (LCIDF) and information indication field (IIF); LCIDF saves ID information of the logic channel, and IIF saves information of all RLC PDU transferred by logic channel. The invention also discloses transmission system of MAC PDU. The invention saves overhead of head of MAC PDU, and reduces resource waste.

A method for executing end to end authentication in a network environment is provided that includes initiating a communications tunnel with a layer two tunnel protocol (L2TP) network server (LNS) and communicating an activate context request that includes an authentication protocol in a protocol configuration option (PCO) field, the activate context request being received by a gateway general packet radio service (GPRS) support node (GGSN) that initiates a link control protocol (LCP) negotiation with the LNS, the GGSN being operable to communicate an activate context response that may be received by the mobile terminal. An authentication response may be calculated by using a secret value and a challenge value which is provided by the GGSN, the authentication response being used to establish a communication session associated with the mobile terminal.

The present invention provides a device and method using the radio resource control protocol (RRC protocol) in a mobile communication system environment the reconstruction of the connection. In an embodiment, a user terminal equipment (User Equipment) is provided, when the state of the user terminal equipment is a connection status connected to a mobile communications system, the reconstruction operation of the connection is performed. When problems occur in the network, a Security Mode is activated, and the user terminal equipment will start the reconstruction connection program of the RRC protocol. However, when the security mode is not activated and the RRC protocol represents that it has reached the maximum retransfer attempting number, the user terminal device will reset the lower layer of the radio resource control protocol, release unnecessary radio resource, and indicate the released RRC protocol connection to the upper layer of the RRC protocol; and then enters a radio resource control protocol idle status (RRC_IDLE State), and waits for the next trigger event.

In a method for encrypting data in an access virtual private network (VPN), a subscriber performs a data encrypting step for data security upon accessing the private network of his company. In this method, access is set up in a dead step according to an access attempt signal by a user. A link control protocol (LCP) negotiation is performed with regard to a mutual authentication method, maximum number of reception bytes, and whether to perform data compression. When the LCP negotiation determines that mutual authentication and data encryption are necessary, the authenticating step is performed first, and mutual authentication is performed by use of a challenge handshake authentication protocol / password authentication protocol (CHAP / PAP). If the authentication is normally completed, the data encryption is performed. Therefore, data encryption is performed together with user authentication so that data is not easily exposed and communication with guaranteed security is performed.

The invention discloses a point-to-point communication method based on near field communication (NFC) and a near field communication (NFC) device, wherein the communication method comprises the following steps: a sender sets a safety module; the safety module is applied to a logic link control protocol (LLCP) layer and uses a first key to encrypt a second key and sends the encrypted second key toa receiver to notify the receiver that the second key is used when data are transmitted; the first key is a common key of the receiver and the second key is used for encrypting the transmitted data inthe communication between the sender and the receiver, and the safety module uses a first key to encrypt the data and sends the encrypted data to the receiver. Symmetrical keys are adopted with higher data decryption speed, thereby ensuring point-to-point data transmitting safety and enhancing efficiency. The safety module is applied to the logic link control protocol (LLCP) layer and is not arranged on an application layer for encryption, thereby achieving higher encryption safety.

A packet structure and a packet transmission method of a network control protocol. A user in the inside or outside of the house can effectively control various home appliances such as refrigerator or laundry machine or monitor operation state of the devices, over the living network such as RS-485 network, low-power RF network, and power line network so that the user can enjoy the remote control and the convenient monitoring. In addition, the packet structure for the inter-layer interface of the network control protocol can be managed. The packet structure at the application layer is generated by assigning one of an application layer protocol data unit header, a request message, a response message, and an event message, together with an application layer protocol data unit header The generated packet at the application layer is transmitted to thus interface layers of the network control protocol. Therefore, the packet structure at the application layer can be more efficiently managed and transmitted.

This invention relates to HDLC protocol transmission process module including a port arbitration module, a HDLC protocol transmission processor and a state memory module. The data process method is that the port arbitration module receives data request signals of N ports and transfers them to the HDLC protocol processor orderly according to the priorities and provides arbitration to the shared data process pipelines of N ports, the HDLC processor reads out unprocessed data from FIFO and reads out the state data of its belonged HDLC channel from the state memory module be processed wit hpipelines to be sent to related ports to write back to the state memory the new state data of HDLC channel.

Disclosed is a method of realizing a link access control protocol for IP M / B packet transmission in a mobile communication network. The method of the invention comprises the steps of: receiving by an LAC of a BTS / BSC an Internet IP M / B packet transferred via a BSC / PCF from an Internet host and a multicasting server, storing the Internet IP M / B packet into an internal buffer, and segmenting the Internet IP M / B packet into a radio packet frame size; adding sequence numbers to the segmented radio packet frames and transmitting a CIBP SDU into a mobile terminal; and assembling, in the mobile terminal, the CIBP SDU for the received radio packet frames and forming the IP M / B packet, and transferring the formed IP M / B packet into an upper layer.

The invention relates to the technical field of wireless communication. The invention discloses a method for optimizing a terminal control protocol (TCP) under a wireless environment. The invention comprises the following steps of: comprehensively analyzing physical layer (PHY) channel condition information and hybrid automatic requestor (HARQ) information, multi-access computer (MAC) layer scheduling information, radio link control (RLC) layer automatic repeat quest (ARQ) information, and packet data convergence protocol PDCP switching information through the cross-layer information, judging whether loss of a TCP layer message is caused by router congestion at a core network side or the loss of a data message of a wireless chain side, therefore, misleading of starting congestion of a TCP layer is avoided, user sending speed influenced by an algorithm is avoided, retransmission competition between the TCP and an ARQ / HARQ caused by misleading the TCP to start a quick retransmission algorithm is avoided simultaneously, and a performance of the TCP protocol under the wireless environment is optimized. A layer-cross structure provided by the invention keeps an interface and a port between middle layers of a long term evolution (LTE) layering protocol framework unchanged; furthermore, running efficiency of the TCP protocol under the wireless environment is improved on the basis of keeping interconnection and intercommunication with an original network.

In an IP-based Code Division Multiple Access (CDMA) 2000 packet-data cellular telecommunications network, a method and system for handing over a dormant Mobile Node (MN) to a target packet zone. According to the invention, first the dormant MN sends an origination request message to the target Base Station Controller and Packet Control Function (BSC / PCF), which further sends a registration request comprising an indication that the MN is dormant to a Packet Data Service Node (PDSN). The PDSN replies to the BSC / PCF with a registration reply message for requesting the establishment of a traffic channel for the MN, and for indicating that it has data packets ready to be sent to the MN, such as for example Link Control Protocol (LCP) data packets for use in the negotiation of a new Point-to-Point Protocol (PPP) connection. The registration reply message comprises an indication such as for example a Data ready to Sent (DRS) parameter set to 1. The BSC / PCF establishes the traffic channel and forwards the data packets to the MN. Following the receipt of the registration reply in the BSC / PCF, the paging of the MN is avoided.

Frame Relay (FR) fragmentation control protocol for enabling FR access device and switches to support real-time traffic, such as VoIP and VOFR, enables communicating peers to negotiate dynamically for fragmentation operation and configuration parameters, as well as to terminate such an operation. Procedure is applicable to FR UNI or NNI fragmentation and end-to-end fragmentation, as well as to PPP fragmentation. Effectively, fragmentation is deployable on demand, and configuration negotiation is supportable across the network. Preferably, such control protocol allows systems with fragmentation to interoperate with older systems that do not support fragmentation.

In the invention, radio network controller (RNC) sends message of load control protocol and message of call control protocol to media gateway (MGW). MGW own processes the message of load control protocol, and MGW transmits the received message of call control protocol to a mobile switching center server (MSC) to process. MSC_Server configures MGW as a signaling transit point (STP) to reach RNC. Thus, message of call control protocol is sent to MGW first, and then is transmitted to RNC. The invention provides a method for RNC of R99 to switch in WCDMA R4 network seamless so as to utilize current network equipment fully. The invention makes current network equipment upgrade to R4 network smoothly so as to save investment.

The invention relates to an IP set-top box(STB) opens again when fast turns on the network the method, its characteristic lies in by the customer end IP set-top box (STB) terminated PPPoE before heavy start pass machine-hour to the long-distance server transmission the connection the PADT text of a telegram, after the long-distance server receives the PADT text of a telegram first to release and the customer end network level connection, takes back originally assigns for the customer end IP address, then the link controlling agreement release data link layer connection, finally releases the physical connection, after the IP set-top box(STB) starts again, again between fast establishment customer end and long-distance server connection. This invention, an IP set-top box (STB), opens again when fast turns on the network the method, after the massive experiments proved this method has the feasibility and the stability, the connection long-distance server speed obvious improvement, greatly saved the user to connect the server the time and has promoted the IP set-top box (STB) performance in the certain degree.

The invention relates to method and system for transmitting data between user equipment and serving mobile location center in packet-switched-radio system implementing user equipment location service. The method comprises: (302) data to be transmitted is placed in a message of a third-layer radio resource protocol; (304) the radio resource protocol message is transmitted to the radio network using a logical link control protocol set on the second layer of the packet protocol stack; (306) a logical link control protocol relay set on the second layer of the packet protocol stack in the radio network directs the logical link protocol message to a second party; (308) the second-layer logical link control protocol residing in the second party transmits the radio resource protocol message to the radio resource protocol set on the third layer; (310) the second party disassembles the transmitted data from the radio resource protocol message.

The invention relates to a method for implementing the control protocol of the random and periodical media access of a radio network, comprising the following steps: step 1, after network initialization, each SU synchronously and periodically repeats one work period Tpointed by OP-MAC; step 2, in the OP-MAC work period, each SU monitors signal paths in the network firstly; step 3, each SU respectively reports the results of the monitored signal channels so that all SU in the network can share the monitored information of idle signal channels; step 4, SU competition is carried out, and available idle signal channels are reserved; and step 5, each SU which succeeds in the competition in the transmission reservation stage transmits data. The network capability of the OP-MAC protocol of the invention in the cognitive radio network is obviously superior to CO-MAC and R-MAC.

The invention discloses a method for processing acknowledgement information in an acknowledgement mode based on an RLC (Radio Link Control) protocol, which comprises the following steps of: receiving the acknowledgement information by an acknowledgement mode radio link control (AM RLC) entity of a sending end; and judging whether a radio link control protocol service data unit (RLC SDU) is transmitted successfully or not according to the received acknowledgment information, if so, reporting the transmission success message of the successfully transmitted RLC SDU to an upper layer, otherwise, not reporting. The invention further discloses a corresponding processing system. In the invention, as the transmission success message about the successfully transmitted RLC SDU is always reported to the upper layer no mater whether the transmission success acknowledgement of an AMD PDU corresponding to the lower boundary of a sending window is received or not, the transmission success message can be reported in time. Therefore, the storage resources and the transmission resources are saved, and the quality of service is improved.

The invention discloses a method and a device for enabling a third generation (3G) user to safely access to network. When a link control protocol (LCP) attribute and a user name of a client, which are acquired by layer 2 tunneling protocol network server (LNS), are acceptable, an temporary internet protocol (IP) address is selected from an established temporary IP address pool and distributed to the client, fixed information which is sent by the client and can verify the client identity is received, when the fixed information is received, the fixed information is correspondingly recorded with the user name and a password, the point-to-point protocol (PPP) connection with the client is disconnected to trigger the client to initiate a second time virtual private dial-up network (VPDN) call, the client is informed of the specified IP address which is distributed by authentication, authorization and accounting (AAA) server to the client according to the recorded fixed information, the user name and the password, or when the fixed information is received, the fixed information, the user name and the password are directly sent to the AAA server to verify the client, and after the client passes the authentication, the client is informed of the specified IP address which is distributed by the AAA server to the client. By means of the method and the device, the client can access to network only when the client is subjected to safety authentication by the LNS, and the safety of network access is improved.

A method for setting headers in a transmitter of a wireless communications system includes dividing a Radio Link Control Protocol Data Unit into a plurality of segments each including a header, and setting the header to include a field indicating a sequence number of the Radio Link Control Protocol Data Unit.

A data communication apparatus, comprising: a first control unit for controlling a client trying to access in order to establish a session by a call control protocol, for data communication by a data communication protocol that is other than said call control protocol; an IP address acquiring unit for acquiring an IP address of said client from the data of said call control protocol; and a second control unit for rejecting data communication from a client, which IP address is other than said acquired IP address, while and after said session is established.

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.