100 results about "Wireless metropolitan area network" patented technology

A system and method are disclosed for providing a high speed wireless network. In one embodiment, a network is configured in a star configuration having a single router at the center. A Metropolitan Access Network (MAN) is configured with a plurality of access points that provide a wireless interface using defined physical layer and Media Access Control (MAC) layer. Packet data delivered to and from the access points are connected to the single router using a plurality of layer two links, which may include point to point links and packet switches. All links within the network operate at layer two or below and do not modify the packet data. The single router at the center of the MAN star network uses layer three information to direct packets between Local Area Networks (LANs) or sub-networks connected to different ports on the router.

The invention relates to a secure access method for the wireless metropolitan area network which comprises an identification-authentication step and a session-key consultation step. The identification-authentication step comprises: a base station (BS) sends an activating message for access identification to a subscriber station (SS); the SS sends a request message for access identification to the BS; if the SS which sends the request message for access identification has been sent with the activating message for access identification, the BS sends a request message for certificate identification to an authentication server (AS) and then the AS sends a response message for certificate authentication to the BS which then verifies the legitimacy of the SS according to the response message for certificate authentication; if the SS is legal, an access identification response message is sent to the SS which then verifies the legitimacy of the BS according to the access identification response message; if the BS is legal, following steps are continued. The BS of the proposal of the invention only handles the request message for access identification of the SS to which an 'activating message for access identification' has been sent, thus effectively avoiding DOS attacks or DDOS attacks, realizing the identification and authentication of the SS and the BS and increasing the security.

A method and apparatus for baseband transmission between a top floor unit and an outdoor unit in a terminal for a wireless metropolitan area network. A terminal for a wireless link in a metropolitan area network includes an extender device (e.g. a top floor unit) for receiving data packets from a computer network coupled to the extender device and for forwarding the data packets, and a broadcast device (e.g. an outdoor unit) coupled to the extender device for receiving the data packets from the extender device according to baseband transmission and having a wireless transceiver for communicating the data packets over the wireless link. The terminal can include a cable coupled between the extender device and the broadcast device wherein the cable comprises a twisted pair of conductors for providing the data packets from the extender device to the broadcast device. The twisted pair of conductors can be a Category 5 twisted pair of conductors. Thee broadcast device can include a microwave antenna coupled to the wireless transceiver; and a housing coupled to the microwave antenna for enclosing the wireless transceiver.

The invention relates to a method for safe accessing of a wireless metropolitan area network, which comprises an authenticating step and a session key negotiating step. The authenticating step comprises that: a subscriber station SS sends a request message for access authentication to a base station BS; the BS sends a request message for certificate authentication to an authentication server AS; the AS verifies the request message for certificate authentication and sends a response message for certificate authentication to the BS; the BS verifies the validity of the identity of the SS according to the response message for certificate authentication; if the SS is valid, the BS sends the response message for access authentication to the SS; the SS verifies the validity of the BS according to the response message for access authentication; if the BS is valid, the SS uses the encryption certificate key of the SS to decrypt the material of authentication key. The SS signing certificate in the proposal is used for stating the identity and the SS encrypting certificate is used for encrypting and decrypting the material of authentication key so as to reduce the risk that the key is decrypted; through verifying the certificates of the BS and the SS by the AS, authentication for the subscriber station SS and the base station BS is realized and security level is improved.

A distribution network for coupling wireless signals between an internetworking device and a plurality of remotely located access points to provide wireless service within a geographic coverage area composed of microcells. The distribution network makes use of available transport cabling. Examples of such wireless signals include wireless metropolitan area network signals and mobile broadband wireless network signals.

In a base station of an IEEE 802.16 Wireless MAN-based portable Internet system, a forward packet scheduling method and apparatus is provided. The portable Internet system portable Internet service includes a user terminal AT for providing a portable Internet service, a base station AP for supporting an inter-user terminal wireless access and network connection, and a packet access router PAR for performing a mobility control and packet routing function of each user terminal AT. The forward packet scheduler includes a packet-based subsidiary scheduling part for considering a real-time service and a user-based scheduling part for ensuring fairness and increasing system efficiency (throughput). After finishing the 2-step scheduling, the generated frame data are transmitted though a physical layer to a wireless user terminal. Therefore, with such a structure, the forward packet scheduling method may guarantee a maximum of system efficiency and fairness according to each user's QoS requirements, and may also guarantee a delay performance for a real-time service.

A portable communication device such a mobile phone is disclosed which may be configured to communicate using a wireless personal area network (WPAN) protocol and one or more wireless local area network (WLAN), wireless metropolitan area network (WMAN) or wireless wide area network (WWAN) protocols. The portable communication device includes a port to store and/or charge a separate WPAN device such as a wireless headset and in certain embodiments, the port may charge a battery of wireless headset so that both the portable communication device and wireless headset may be carried as an integrated single unit and/or charged using a single charging cord. Additional embodiments and variations are also disclosed.

The invention provides a method for the terminal in the wireless LAN entering the leisure mode, it includes following steps: a. the moving terminal sends the requirement for entering the idle mode to the base station BS/ paging agent PA; b. said BS/PA response the requirement sent by the moving terminal, the drop point PC determines to allow the moving terminal entering the leisure mode, and informs the data path to release the link of moving terminal; c. after the link of moving terminal is released, BS/PA send deleted registration message which shows the location is refreshed successfully to the moving terminal; d. BS/PA sends the confirmed messages to the further agent FA, and the FA sends the message to the drop point paging controller PC/location register LR, and saves the context ofmoving terminal to refresh the data. The invention increases the integrality and stability for the moving terminal entering the idle mode.

A method for managing wireless multi-hop network key is applicable to a security application protocol when a WAPI frame method (TePA, an access control method based on the ternary peer-to-peer identification) is applied in a concrete network containing a Wireless Local Area Network, a Wireless Metropolitan Area Network AN and a Wireless Personal Area Network. The key management method of the present invention includes the steps of key generation, key distribution, key storage, key modification and key revocation. The present invention solves the technical problems that the prior pre-share-key based key management method is not suitable for larger networks and the PKI-based key management method is not suitable for wireless multi-hop networks; the public-key system and the ternary structure are adopted, thereby the security and the performance of the wireless multi-hop networks are improved.

This invention relates to a method for strengthening safety of radio MAN canon IEEE 802.16 including the following steps: 1) SS sends certification information messages to BS, 2) SS sends discrimination request message to BS, 3) BS sends certification discrimination request message to AS, 4) sends a response message to BS, 5) BS sends an access response message to SS, 6) SS sends an authorized ciphered key negotiation request message, 7) BS sends a response message to SS, 8) SS sends session ciphered key negotiation message, 9) BS sends a response message to SS.

The invention discloses a roadside parking intelligence management system and a realization method thereof. The system comprises a plurality of parking stall sensors (101), a self-organizing network gateway (102), a wireless metropolitan area network (103) and a roadside parking management platform (104). The parking stall sensors and the gateway (102) form a self-organizing network. The parking stall sensors (101) is used to sense a parking state of the parking stall and send parking state information to the gateway (102) of the self-organizing network by using the self-organizing network. The gateway (102) is used to send received parking state data of the parking stall sensors (101) to the roadside parking management platform (104) through the wireless metropolitan area network (103). The roadside parking management platform (104) is used to manage parking stall data information. According to the invention, through the parking stall sensors, the parking stall state information can be acquired in real time and can be timely reported to the roadside parking management platform so that high-efficient and accurate management is realized.

A method and apparatus for supporting an emergency call in a wireless communication system including a wireless metropolitan area network (WMAN) are disclosed. A wireless transmit/receive unit (WTRU) sends an emergency call message to a base station of the WMAN to make an emergency call along with an emergency call indication. The base station then admits the emergency call with or without performing a security procedure and connects the WTRU to an emergency call center. The base station and the WTRU may communicate capability information regarding support of emergency calls. Location information of the WTRU is also forwarded to the emergency call center. The base station may work as a proxy for the WTRU if the WTRU does not have all the required functionalities to complete the emergency call. The WTRU may be a multi-mode WTRU capable of communicating with two or more radio access networks (RANs).

A network access authentication and authorization method includes the steps of: constructing an access and authorization request packet; constructing a certificate authentication request packet, constructing a certificate authentication response packet; constructing an access and authorization response packet; constructing an access and authorization acknowledgement packet. And an authorization key updating method includes the steps of: constructing an access and authorization request packet; constructing an access and authorization response packet; constructing an access and authorization acknowledgement packet. The invention resolves the security problem that a mobile terminal accesses a base station in the wideband wireless multimedia network, and realizes both bi-directional identity authentication of a mobile terminal and a base station and unidirectional identity authentication from a base station to a mobile terminal. The authorization key negotiation calculation is simple, and the key management is simply realized by using message acknowledgement manner. The invention is applied to the wired network and the wireless network, such as the wireless local area network, the wireless metropolitan area network, and the broadband wireless multimedia network etc.

The invention discloses a safe context organizing structure and a maintaining method in broadband wireless metropolitan area network base station medium accessed to a control system. The organizing structure comprises a connection identifiers hashtable which is used for managing the context of authorization keys and a safety association identifying hashtable which is used for managing the context of communication secret keys. The maintaining method operates on the connection identifiers hashtable and the safety association identifying hashtable respectively when can authenticate the expandable authentication agreement to terminals, when in the process of safety association-communication encryption secret key shaking hands and when terminals distributes secret keys and create service flow. The invention can realize the organization and maintenance of safety context and high-speed searching. When terminals are in large number and the data amount is large, the maintaining efficiency of data can be improved to a large extent.

The invention relates to a page method of wireless city network, to reduce the maintenance, page range and number. Wherein, it limits the range of page group in one ASN GW; the Serving GW adds itself mark when transferring the position refresh message of base station; PC/LR receives said position refresh message and records the relationship between page group and Serving GW; when paging, based on said relationship, only sending page message to relative Serving GW.

The invention relates to a multicast key management method of wireless metropolitan area network. The method comprises the following steps: (1) distribution of multicast private keys: (1.1) transmitting a multicast private key request grouping from a requester entities to a responder entities, (1.2) transmitting a multicast private key response grouping from the responder entities to the requester entities, and (1.3) transmitting a multicast private key confirm grouping from the requester entities to the responder entities; and (2) distribution or updating of encrypted keys of the multicast private keys; (2.1) broadcasting the encrypted keys broadcasting grouping of the multicast private keys by the responder entities to all of the requester entities, and (2.2) deciphering the encrypted keys of the multicast private keys from the encrypted keys broadcasting grouping of the multicast private keys by the requester entities. The multicast key management method solves the problems of the poor key safety and low updating efficiency of the multicast keys of the multicast key management of the wireless metropolitan area network.

The present invention relates to a combined narrowband interference detection, elimination and channel estimation method based on a continuous cyclic shift training sequence in an OFDM system. On the condition of using two OFDM symbol training sequences to carry out the channel estimation, the method utilizes a signal detection and estimation technology and a training sequence design technology to realize the asynchronous narrowband interference detection, estimation and elimination, is applied to a the OFDM systems existing the narrowband interference, such as a wireless local area network IEEE802.11a, a wireless metropolitan area network WiMAX IEEE 802.16e, etc., realizes the accurate estimation and elimination of an asynchronous narrowband signal while realizing the interference robustness detection, and enables the training sequence auxiliary channel estimation performance on an interference condition to be improved effectively.

The invention discloses a curb-side parking fee management system and a method based on a wireless metropolitan area network and a POS terminal. The system at least consists of a parking fee management platform, a handheld automatic charging POS machine and a communication network, and a parking fee management service unified platform comprises a clearing platform, a charging platform, a management supervising platform and a service inducing platform. The method comprises the following steps of downloading the fee rate of a parking lot, collecting the parking information, uploading the parkinginformation to the parking fee management platform in real time by the communication network, charging the corresponding fee from a parker, and uploading the charging information to the parking fee management platform in real time through the wireless metropolitan area network. The invention integrates, innovates and utilizes the WIFI, handheld POS machine and IT information technology to comprehensively monitor personnel, data and finance, and creates an all-round service platform which integrates four functions of the parking management, the fee clearing, the information supervision and theinduction service.

The invention discloses an electric transmission line real-time video condition monitoring system based on wireless communication. The system comprises a plurality of front end monitoring devices, a communication module and a power supply module, the front end monitoring devices are installed on electric transmission line poles and towers, the communication module and the power supply module are connected with the front end monitoring devices, the front end monitoring devices transmit image video information collected through an optical ground wire (OPGW) optical fiber and a wireless metropolitan area network 802.16 protocol to a communication base station, the communication base station transmits the information to a system server, the server checks and browses a current real-time monitoring state through a client, and transmission line states are checked through rotation and focal distances of a pan-tilt remote control camera, so that electric transmission line video states are real-timely monitored. The system uses the OPGW optical fiber for transmission so that the network bandwidth is large and safety is high; and a wireless metropolitan area network technology is used for performing wireless extension so that the system can be used in mountain areas, and the system has the advantages of being high in safety, comprehensiveness, real-time performance and adaptive capacity.

The present invention relates to a method for synchronizing a plurality of low-power sending stations which are dominated by a high-power sending station, each low-power sending station receives the reference synchronizing signal transmitted by the high-power sending station, does synchronizing according to the synchronizing signal and respectively compensates the signal transmission time delay. The high-power sending station can be broadcasting television base station and the low-power sending station can be one or a plurality of base stations selected from wireless metropolitan area network cellular base station, wireless local area network base station and wireless personal area network. The present invention settles the problem of synchronizing the considerable sending stations and can be widely used in the wireless communication system that needs to be done with network synchronizing, and reduces the cost of realizing the network synchronizing.

Wherein, access router are added into said radio metropolitan area network, and access gateways are added into said mobile communication network; the access routers are connected to the access gateways; the AAA server of radio metropolitan area network is taken as a proxy server and is used to authenticate the interaction information required by AAA server of mobile communication network; the AAA server of mobile communication network is used to authenticate user's ID; the authentication data of user's ID is transmitted to the access gateway through the access router, and then is sent to the packet data gateway of mobile communication network through the access gateway, and finally accesses the external IP network.

The invention discloses a task scheduling method based on micro-cloud load balancing in a wireless metropolitan area network. According to the method, how to unload tasks and dispatch the tasks to reasonable micro-clouds is considered, so that a system delay is shortened. For solving the problem of optimization of response time of the micro-cloud tasks in a wireless metropolitan area network environment, an algorithm thought of micro-cloud load balancing is introduced, and a micro-cloud load balancing strategy is provided, thereby shortening average response time of the micro-cloud tasks as much as possible under the condition of meeting multiple constraints in the network. According to the strategy, unique characteristics of the wireless metropolitan area network and micro-cloud task unloading are fully considered; and firstly, the micro-clouds of the network are classified, then expected values of input/output task quantities of the micro-clouds are calculated, and finally minimum-cost maximum flow meeting the constraints is found in a flow network so as to execute all the tasks in the network. The method has positive effects in shortening user task response time and improving user experience.

The invention discloses a micro-cloud deployment and user task scheduling method under a wireless metropolitan area network environment, which overcomes the defects of micro-cloud overload and long queue time by introducing a network delay threshold which can be tolerated by the system, and effectively reduces the average system response time. The invention also discloses a micro-cloud deploymentand user task scheduling method under a wireless metropolitan area network environment. The optimization of micro-cloud deployment scheme and user task scheduling scheme is studied in order to reducethe average waiting time of unloaded tasks. According to a given integer K being equal or greater than 1, K micro-clouds are deployed at K receiving points in the wireless metropolitan area network (WMAN), and then user tasks in the WMAN are scheduled to the micro-clouds according to certain rules, so that the average waiting time of the unloaded tasks of the user is minimized. On the basis of theload priority algorithm, the invention optimizes the obvious defects of the algorithm, and proposes a density priority deployment algorithm which is closest to the optimal algorithm according to theactual situation, so as to effectively minimize the system response time and remarkably optimize the mobile application performance of the metropolitan area network.

The invention discloses a wireless metropolitan area network system and an identification and verification method of a wireless metropolitan area network. The wireless metropolitan area network system comprises a certificate authority server CA and an identity identification server AS, wherein the certificate authority server CA authorizes certificates for the identity identification servers AS, BS and SS through a CA signing certificate and a private key; the BS is provided with a BS signing certificate, a trusting AS signing certificate and a CA signing certificate, and the SS is provided with an SS signing certificate, an SS encryption certificate, a trusting AS signing certificate and a trusting CA signing certificate; and the identity identification certificate AS is provided with anAS signing certificate and a CA signing certificate and uses a public key of the CA signing certificate to identify the certificates of the BS and SS. According to the scheme of the invention, certificate authority and identity identification are separated effectively, so that the wireless metropolitan area network system can be compatible with the conventional infrastructure such as the certificate authority server CA.