Showing papers by "Huawei published in 2003"

Coherent optical detection and signal processing method and system

Abstract: A method and system of coherent detection of optical signals. The system utilizes a digital signal processor (36) to recover an incoming optical signal. The system employs a local oscillator (56), which does not need to be phase locked to the signal. The signal may be consistently recovered, even when the polarization state varies over time. Additionally, the signal may be recovered when it comprises two channels of the same wavelength that are polarization multiplexed together. In addition, any impairment to the signal may be reversed or eliminated.

Radio communication system

Abstract: A TDMA radio communication system using a multiple subcarrier modulation method and comprising at least a first and a second radio station. The first radio station carries out communications by selectively modulating a subcarrier with which a desired transmission rate can be obtained in the second radio station, thereby providing a radio communication system that does not require the monitoring of each time slot by a terminal.

Dealing with composite data through data model entities

Abstract: The present invention is generally directed to a system, method and article of manufacture for accessing data represented abstractly through an abstraction model. In one embodiment, a data repository abstraction layer provides a logical view of an underlying data repository that is independent of the particular manner of data representation. A query abstraction layer is also provided and is based on the data repository abstraction layer. A runtime component performs conversion of an abstract query (i.e., a request for results or a request to modify data) into a form that can be used against a particular physical data representation. Abstract and/or physical queries are transformed according to model entities which define a relationship between logical fields of the data repository abstraction layer.

The system and method for realizing the resource distribution in the communication network

Abstract: The present invention relates to a system for implementing resource allocation in network communication and a method thereof. It effectively solves the end-to-end QOS problem through dividing a communication network into a plurality of QOS domains and managing them. In the present invention, only end-to-end path information is maintained at the QER of the QOS domain that is directly connected with the source/destination terminal, while only edge-to-edge resource reservation information for aggregate flows is maintained at other QERs, thus significantly reducing flow state information maintained at the network nodes as well as overhead of signaling protocol processing and storage at the network nodes.

Secure mobile ad-hoc network and related methods

Abstract: A mobile ad-hoc network (10) may include a plurality of nodes including a source node (11a) and at least one adjacent node (11b). The source node (11a) may include a wireless communications device for establishing a wireless communication link with the at least one adjacent node (11b), a plain text source (24), and a second generator (20) for performing a one-way algorithm using a secret key for generating a seed. Furthermore, the source node (11a) may also include a key encryptor (22) for receiving the seed and generating a key sequence based thereon, and a logic circuit for generating a cipher text for transmission over the wireless communications link and based upon the key sequence and the plain text.

3-Layer VPN and constructing method thereof

Abstract: The present invention discloses a 3-layer Virtual Private Network (VPN) which comprises P devices and PE devices in the backbone network, a plurality of sites and CE devices in subscribers' VPNs, and Hierarchy of PE (HoPE) devices, said HoPE devices serve as edge routers in the backbone network and are connected to P devices in the backbone network as well as sites and CE devices in subscribers' VPNs; said HoPE devices comprise understratum PEs (UPEs), zero or more middle-level PEs (MPES) and superior PEs (SPEs) connected with each other, and all of said PEs (UPEs, MPEs, and SPEs) take different roles and deliver the function of a central PE. For the SPEs, the routing and forwarding performance should be relatively higher; while for UPEs, the performance may be lower. The architecture according to the present invention can enhance the expandability in hierarchical BGP/MPLS VPNs.

The method for distributes the encrypted key in wireless lan

Abstract: An method for distributes the encrypted key in wireless LAN, this method combines the distribution course of the key with authentication course of the mobile terminal, utilizes the authentication server or the wireless gateway to manage the distribution of the key, so mobile terminal users may be roam in range greater than the range of the key manage server covers. Because the distribution of the key does not involve transmitting the key, which was not encrypted through the air interface, the method has ensured that the key is safe. In addition, the above-mentioned key distribution method does not depend on the specific authentication, therefore can use it under various kinds of authentication agreements. Finally, because AP does not need to manage user's information, the method simplified the structure of AP thus lowered costs.

Ranging method for mobile communication system based on orthogonal frequency division multiple access scheme

Abstract: Disclosed herein is a ranging method for a mobile communication system based on an OFDMA (Orthogonal Frequency Division Multiple Access) scheme. In the communication system for classifying a ranging procedure between a transmission side and reception sides into an initial ranging process, a bandwidth request ranging process, and a periodic ranging process, the ranging method includes the steps of determining the number of initial RCs(ranging codes) for the initial ranging process, the number of bandwidth request RCs for the bandwidth request ranging process, and the number of periodic RCs for the periodic ranging process, determining a backoff value of the periodic RCs according to the number of the periodic RCs, and sending the initial RCs, the bandwidth request RCs, the periodic RCs, and the backoff value of the periodic RCs to the reception sides.

Method for managing multicast subscribers in mobile network

Abstract: The present invention discloses a method for managing multicast subscribers in mobile network, comprising: the data related with multicast traffic is classified into multicast-related record data and multicast route data, wherein said multicast-related record data is stored in the system for query, while said multicast route data is hierarchically stored in the system to determine how to forward multicast data; when a subscriber joins in a multicast group or the multicast subscriber exits the multicast group, said hierarchical multicast route data and said multicast-related record data are modified accordingly, when the multicast subscriber performs position register and position update in network, said hierarchical multicast route data in the system is modified accordingly; in said method, the management of multicast subscribers in mobile network can be achieved and both management efficiency and utilization coefficient of system resources are improved.

Process method about the service connection between the wireless local area network and user terminal

Abstract: This invention discloses a process method about the service connection between the wireless local area network (WLAN) and user terminal, this method can be used in the interaction network which composes at least wireless local area network (WLAN) user terminal, WLAN connect unit, service control unit and user information storage unit, the said method is: set the attach or detach sign which denotes the connection between the user terminal and the WLAN in the WLAN user terminal and service control unit, establish or cancel the service connection between user terminal and the network via interaction the WLAN user terminal and the WLAN, simultaneity, amend the relevant sign. This method expresses the service connection about the WLAN user terminal, so as to process interaction and control operation between the WLAN user terminal and service control unit, and also this method remain the user information accordant in the user information storage unit and service the service control unit, to prevent sending the redundance information, improve system work efficiency.

Method for positioning mobile station and repeater thereof

Abstract: The present invention relates to a method for positioning a mobile station and a repeater thereof. Said method comprises: the mobile communication network, when receiving a positioning request from a mobile station, instructing repeaters to send auxiliary positioning signals, and the mobile station performs measurement according to the received auxiliary positioning signals sent from the repeaters and downlink signals sent from the base station, and then estimating the position of the mobile station according to the measurement results, and thereby implementing the positioning of the mobile station. Said repeater is implemented through adding an auxiliary positioning unit in the downlink processing channel of a traditional repeater; said auxiliary positioning unit comprises a communication module, a frame timing recovery module, a timing control module, and a pilot modulating module. The present invention achieves the object of improving the accuracy of positioning the mobile station within the coverage area of repeaters; in addition, the repeater with auxiliary positioning function according to the present invention is simple to be implemented and doesn't affect the structure and signaling flow of the traditional mobile station.

802.1X protocol-based multicasting control method

Abstract: The present invention discloses an 802.1X protocol-based multicasting control method. According to the method, an authenticated subscriber intercepts the message while sending a request message for joining in a multicasting group, then obtains the port and MAC address information from the intercepted message, searches corresponding subscriber account information from the authenticated data according to said port and MAC address, then authenticates the subscriber's account number and multicasting IP address, and adds the subscriber to the multicasting group after successful authentication; therefore, controlled multicasting, authentication of the legality of adding to multicasting, and accounting can be achieved according to the method, which can also protect existing investment and compatibility with existing software of the subscriber.

Network and method of realizing local roaming for subscribers

Abstract: The present invention discloses an network and method of realizing local roaming for subscribers, said network includes BTS, BSC, MSC, VLR, HLR, and roaming number manager (RNM) connected with HLR ; said RNM is used to manage mobile numbers of home and negotiation roaming location, and dynamically allocates the mobile number of negotiation roaming location to roaming user to realizing local roaming ; said method includes: configuration the RNM with numbers of negotiation roaming location, separate PSTN/ISDN number and signalling point code ; collocating the data in the entity of negotiation roaming and home location ; establishing the interface between RNM and negotiation roaming and home local network ;the users utilizing the above configuration to realizing local roaming. Adopting above method and network can realize local roaming for mobile users, and greatly reduce commucation cost when the user is roaming, in addition, it needs small chang, low cost and convenient implementation for the exist network.

A method of locating and measuring a mobile station

Abstract: The invention provides a method of locating and measuring a mobile station, which relates to the technology of wireless location measurement in the art of mobile communication. The method improves the first route decision method of down-link signal in the adjacent base station, which calculates the effective range of the first route of the down-link signal in the adjacent base station when it appeared by the advantage of the geometry relation between the distance from mobile station to reference base station and the distance from adjacent base station to reference base station, ect. According to the parameter of this the effective range, it subdivides the effective search window on the base of original large search window, and then it decides the first route of down-link signal in the adjacent base station in the effective search window. The invention improves the accuracy of the first route decision of down-link signal in the adjacent base station, further more, it improves the accuracy of the whole location and measurement for a mobile station.

Method for preventing IP address cheating in dynamic address allocation

Abstract: Disclosed is a method for preventing IP address cheating in dynamic address allocation. Firstly, check the source MAC address and the source IP address involved in an ARP packet sent from a subscriber terminal, i.e., detect whether there is a matching item in the legal subscriber address table; if so, process it normally, otherwise discard the ARP packet. In this way, an illegal subscriber cannot access to network through IP address cheating, but a legal subscriber can operate normally and continuously. For a subscriber terminal with a static IP address, a static item table is set in the legal subscriber address by manual configuration. When a new subscriber terminal asks for being allocated an IP address, check whether the IP address to be allocated has been set as a static item; if so, inform the subscriber terminal of applying for another IP address. In this way, it is guaranteed that static IP address having been allocated to a subscriber terminal will not be re-allocated, and it is avoided that the subscriber terminal with legal static IP address cannot access to network normally due to the re-allocation of IP address.

Scheduling method for polling device data

Abstract: A scheduling method relates to polling device data, comprising the steps of: classifying the managed devices according to their types; classifying all kinds of data in each device to form modules, and assigning a priority and a polling period attribute for each module; dividing the managed devices into two groups according to needing polling or needing checking the connection state, one is the group of devices needing polling, the other is the group of devices needing checking the connection state; periodically polling each module in the group of needing polling based on the module's priority and polling period, wherein forming the current polling queue in order to schedule the data polling based on the current polling queue. The invention can set polling period according to data's variable degrees then employ a different polling strategy. The invention also can real-time and flexibly change the polling strategy based on the device's state; and schedule all the devices of the network management system together, thereby control the total system load and network load of the network management system effectively, and use the system resource more reasonably.

Adaptive digital predistortion method and apparatus for wireless transmitter

Abstract: An adaptive digital predistortion apparatus and method for transmitting broadband digital signals from a wireless transmitter to a transmitting channel are provided. In the adaptive digital predistortion process, a non-linearity conversion opposite to the transmitting channel characteristic is performed by a digital predistorter for input baseband signals. The predistorted signals are amplified by a power amplifier via an up conversion channel. A part of the signals outputted from the power amplifier are fed back to an adaptive controller via a coupler. The feedback signals are processed by the adaptive controller to obtain out-of-band emission energy of the feedback signals. Using the out-of-band emission energy as a target function, the predistortion parameters are updated by employing a multi-parameter optimum seeking module. Accordingly, broadband signals to be transmitted are predistorted by the digital predistortion system to cancel out the non-linear characteristic of the transmitting channels, and to suppress the out-of-band emission energy of the outputting signals. Meanwhile, by using a multi-parameter optimization seeking module, the predistortion parameters are adjusted adaptively by the digital predistortion system based on the slow variation of non-linearity of the transmitting channels.

Method and system for controlling the multicast source

Abstract: The present invention provides a multicast source control method, which comprises: creating multicast source authentication information; a management platform of the multicast source authentication information dynamically updating said multicast source authentication information in accordance with restriction on multicast source; controlling multicast message sent from the multicast source in accordance with said multicast source authentication information. The present invention also provides a multicast source control system comprising a master multicast source authentication server, a group of slave multicast source authentication servers, and a predefined node. With the present invention, multicast sources can be performed a control management at the earliest time through initiating authentication requests for multicast sources by the predefined node; the network terminal resources are saved through deploying hierarchical distributed multicast source authentication servers to manage different multicast address fields; without manual intervention, the master and slave multicast source authentication servers interact for authentication information periodically and in real time, such that automatic and real time management of multicast sources can be implemented; and thereby the object of reducing management and maintenance cost as well as improving manageability and operability of the multicast network is attained.

Apparatus and method for implementing multi-traffic load monitoring and prediction

Abstract: An apparatus and method for implementing multi-traffic load monitoring and prediction in a CDMA cellular mobile communication system includes a received signal strength indication (RSSI) measuring unit for measuring total interference power and processing a measured value to eliminate jitters; a parameter accounting or statistic unit for accounting for some traffic parameters associated to the load monitoring and prediction; a load monitoring unit for calculating the load monitoring based on the measured value and statistic results; and a load prediction unit for calculating an increased amount of an up link load after receiving or accessing new traffic and a total load value after receiving or accessing the new traffic based on parameters requested by the new traffic and calculation results transmitted in real time by the load monitoring unit.

Scheduling apparatus and method for determining a desired noise rise over thermal noise in a CDMA mobile communication system

Abstract: There are disclosed an apparatus and method for determining or changing a target ROT for a target cell according to measurement ROTs from its neighbor cells in Node B controlled scheduling for improving enhanced uplink dedicated channels in an asynchronous CDMA communication system. The present invention proposes novel signaling procedures for the purpose of determining or changing the target ROT for the target cell.

Method for implementing router interface backup with virtual router redundancy protocol

Abstract: Disclosed is a method for implementing router interface backup with Virtual Router Redundancy Protocol (VRRP). The method includes the steps of: connecting multiple interfaces of a router or routers to the same LAN and adding these multiple interfaces to the same multicast group; configuring the same virtual router number and virtual IP address to these interfaces to make them join the same virtual router; selecting the main interface and backup interfaces according to their respective priorities among said interfaces; and sending VRRP multicast packets from the main interface to all backup interfaces periodically; if the priority involved in the just received VRRP multicast packet is zero or the backup interfaces have not received any VRRP multicast packet within a predetermined period, one backup interface becoming the main interface and replacing the original one. The invention implements backup between interfaces in a router or routers without affecting the original VRRP backup function between routers.

System and method of network authentication, authorization and accounting

Abstract: A network authentication, authorization and accounting system and a method thereof, wherein said system comprises: a subscriber device, via which a subscriber is connected with the network; an access server, connected with the subscriber device and designed to enable the subscriber device to access the network; an AAA server, connected with the access server and designed to collaborate with the access server to accomplish authentication, authorization, and accounting for the subscriber accessing the network; a service server, connected with the access server, designed to provide specific services, to exchange authentication and authorization information with the AAA server, and to interact with the subscriber device to provide the service; a service accounting server, connected with the service server, designed to collaborate with the service server to accomplish accounting for service resource use of the subscriber, and to send the accounting data to the AAA server. Accordingly, the present invention also discloses a network authentication, authorization and accounting method. The present invention enables a subscriber to access different types of services with only the subscriber identification information (user name and password) through a single identity authentication process, and supports centralized accounting.

Method and system for cluster managing of network facilities

Abstract: A method for managing network facilities is disclosed. According to the method, concentrate management of multiple facilities can be achieved, assigned only few IP addresses, which benefits the reduction of network maintenance and convenience of network management. According to the management method of present invention, multiple network facilities form a cluster/group, at least one of the facilities is designated as the manager of the cluster and assigned public address. The other facilities are configurated and updated the private IP address and routs by the manager. The manager manages the network facilities belong to the cluster according to the steps of: (1) said manager of the cluster setup the IP data channel through said manager between network facilities and said network manager; and (2) said network manager manages network facilities of the cluster via said IP data channel.

Call access control method

Abstract: The present invention discloses a call access control (CAC) method applicable to call access during call initiation and cell switching in TDD-CDMA mobile communication system. The method comprises: counting the number of accessed subscribers in all current communication time slots of the home base station for an access request from a new subscriber, to determine channel resource occupations in different time slots; comparing the channel resource occupations in the different time slots, and then allocating idle resource units in the time slots having available channel resources and the minimum number of accessed subscribers to the subscriber sending the access request. The present invention achieves dynamic allocation of channel resources in cells and have an advantage of simple implementation and applicability.

A method, a system and a terminal for realizing presenting information interaction of the wireless lan users

Abstract: A method for implementing presence information interaction of WLAN (Wireless Local Area Network) subscriber and the system and terminal thereof, wherein, the method comprises setting one or more than one presence information monitoring unit, detecting the presence information by the presence information monitoring unit, and transmitting this presence information to a PRESENCE service system. The system thereof comprises a presence information monitoring unit, a WLAN network and PRESENCE service system, wherein input of the presence information monitoring unit is connected with WLAN network and the output is connected with PRESENCE service system. The terminal thereof also comprises a presence information monitoring unit, which is connected with PRESENCE service system through WLAN.

Prefix search method

Abstract: Prefix searches for directing internet data packets are performed in a prefix search integrated circuit The integrated circuit includes an array of search engines, each of which accesses a prefix search tree data structure to process a prefix search An SDRAM is dedicated to each search engine, and SDRAMs share address and control pins to plural search engines on the IC chip Internal nodes of the tree data structure are duplicated across banks of the SDRAMs to increase bandwidth, and leaf nodes are stored across the SDRAM banks to reduce storage requirements Within each search engine, data stored in a data register from an SDRAM is compared to a prefix search key stored in a key register Based on that comparison, an address is calculated to access further tree structure data from the SDRAM Packet descriptors containing search keys are forwarded to the search engines from an input queue and the search results are forwarded to an output queue, the same packet order being maintained in the two queues

Method for providing an internal server with reduced IP addresses

Abstract: The present invention relates to a method for providing internal server with reduced IP addresses, comprising: first, configure the corresponding relationship information between external address as well as other characteristic information and internal address as well as other characteristic information in the internal server; then, match the relevant information carried by the input messages received by the internal network and the output messages from the internal network with the configured corresponding relationship information respectively; finally, process the message according to the matching result. According to the present invention, WEB server and FTP server in the LAN can be easily provided without occupying too much valid IP addresses, thus, the present invention saves limited public IP addresses resource. Furthermore, the present invention implements port-level support to the internal server, and guarantees the security of network equipments.

Method for implementing Iu-Flex based MBMS

Abstract: A method is provided for implementing Iu-Flex-Based MBMS A SGSN sends an RAB request to an RNC The RNC establishes a corresponding RAB for the multicast traffic according to the request and the SGSN sending the request At the same time, if the RNC detects that a plurality of multicast traffics from other SGSNs correspond to a multicast traffic, the RNC will choose an SGSN as the primary SGSN, take the RAB between the primary SGSN and itself as the primary path to receive the multicast traffic, and maintain the connections to other SGSN Transmission of the multicast traffic is then performed through the primary SGSN, during the multicast traffic transmission process The RNC may change the primary SGSN when necessary, receive multicast traffic through the RAB of the new primary SGSN, and maintain the connections to other SGSNs In this method, multicast traffics can be implemented simply and reliably The method also helps to reduce consumption of network resources and improve network security and accounting management

Adaptor arrangement for detecting faults in an optically amplified multi-span transmission system using a remotely located otdr

Abstract: A method is provided for using OTDR with a bi-directional optical transmission system that includes first and second terminals (310, 320) interconnected by at least first and second unidirectional optical transmission paths (306, 308) having at least one repeater (314) therein. The method begins by transmitting optical probe signals over the first optical path and receiving over the second optical path returned OTDR signals in which status information concerning the first optical is embodied. The optical probe signals and the returned OTDR signals are transmitted and received, respectively, at time intervals allowing individual spans of this optical path, which are separated by the repeater or repeaters, to be monitored in a sequential manner.

Method for automatically establishing base station operating and maintaining channel in international mobile telecommunications 2000

Abstract: A method automatically establishes a base station operating and maintaining channel in International Mobile Telecommunications 2000. A BS initiates a BOOTP Request to the base station controller (BSC) or RNC through the IPOA channel between the BS and the BSC/RNC, and then the BS obtains the IP address allocated to it from the reply from the BSC/RNC, so that an operating and maintaining channel is established between the BS and the BSC/RNC. A BS can establish a maintaining channel for itself automatically when starting, avoiding IP address confliction and parallel starting problems. Moreover, establishing a maintaining channel for the BS results in an easy and small workload. Thus programs and data can be loaded automatically to the BS, and the BS can be effectively configured and maintained by a remote device (i.e., the operating and maintaining station of the BS) at a low cost, and good quality is realized. The method is suitable for star networking, recurrent networking, tree networking, ring networking, etc.