45results about "Multiplex system selection arrangements" patented technology

A system for scheduling a conference between callers includes a database that stores scheduling information indicating at least a start time, a duration, and a maximum number of callers for one or more scheduled conferences, the scheduling information reflecting available conferencing resources. A server complex coupled to the database communicates, to a requesting Internet Protocol (IP) user, at least one page including one or more scheduling input fields. The server complex receives scheduling input from the requesting IP user for a requested conference according to the scheduling input fields. The server complex accesses the database to determine, according to the scheduling input, whether sufficient resources are available for the requested conference. If so, the server complex allocates at least some available resources to the requested conference and generates confirmations of the requested conference for communication to the callers.

A network intelligence provides stateless elemental device control to a plurality of network connected components. Selected ones of the network connected components may be associated with one another as an aggregate device and the state of each associated component may be maintained at the network intelligence in a logical model of the aggregate device. Service adapters in the network intelligence may represent this association of components to data network services as a single, multi-function device.

A network telephone system is provided with a distributed network, a network call processor, with the call processor connected to the network. A telephone line network interface is connected to a telephone line and is connected to the network for receiving packets from the network and sending packets to the network including packets with telephone voice data. A plurality of network telephones are part of the network telephone system with each network telephone connected to the network. Each network telephone has a display for displaying information and each network telephone is capable of engaging in a concurrent telephonic communication. Each network telephone has an I/O device in electrical communication with the network for receiving and sending packets to other devices connected to the network, an input device for producing audio signals from an input local to the device and a packet controller in electrical communication with the I/O device and the input device. The packet controller generates packets from the audio signals received by the input device, forwards the generated packets to the I/O device for transmission to the network and combines packets received by the I/O device to produce an audio signal with the combined packets and the audio signals from the local input device. Each network telephone displays information on the display corresponding to an identity of a source of packets combined whereby the identity may be selected for dropping a source form a concurrent telephonic communication.

A passive optical network (PON) including an optical line termination (OLT) and a plurality of optical network units (ONUs) which are connected. The optical line termination includes a band setting control section; an upstream control cell receiving section; a use right transmitting section; and a downstream control cell transmitting section. Each of the plurality of optical network units includes a downstream control cell receiving section; a use right acquisition determining section; and an upstream control cell transmitting section.

The invention discloses a method for resource allocation of a space division multiplexing spectral flexible optical network with minimum crosstalk. The method comprises the following steps of initializing the space division multiplexing spectral flexible optical network, generating a group of service request sets, computing a shortest working path of each service request, finding available candidate spectrum blocks in different fiber cores, computing crosstalk values of the candidate spectrum blocks on an optical fiber link, selecting the spectrum block with the minimum crosstalk value to serve as a spectrum resource reserved for the service request, and guaranteeing minimization of the crosstalk value of the spectrum resource allocated to the service request. According to the method, a problem of cross crosstalk in the space division multiplexing spectral flexible optical network is solved, so that the service quality of the space division multiplexing spectral flexible optical network is guaranteed, and the transmission performance of the service request in the optical network is improved.

The invention discloses a wave time division mixed multiplexing passive optical network system, which comprises a central office terminal, a client, and an optical distribution network arranged between the central office terminal and the client, wherein the central office terminal comprises an optical line terminal; the client comprises at least one optical network unit; and the optical network unit comprises an uplink processing unit which is used for loading uplink modulation signals to form uplink optical signals with specific wavelength and inputting the uplink optical signals into the optical distribution network. On the premise of ensuring high bandwidth and a large user number and meeting budget of the optical power of the whole network, low-cost colorless optical network unit (ONU) technology without multi-wavelength light source is used, and the passive characteristic of the whole optical distribution network (ODN) is kept, so the networking cost is obviously reduced.

The invention provides a reconfiguration processing method for the OLT (optical line terminal) end to ONU (optical network unit) end parameter configuration failure. The method comprises the following steps of: firstly planning the parameter configuration of ONUs; then polling the parameter configuration states of all ONUs once at fixed time intervals; if a parameter of configuration failure exists in one or more ONUs, reconfiguring the parameter of the corresponding ONU; if the reconfiguration is successful, ending the flow; and if the reconfiguration still fails after multiple times, turning to a parameter configuration failure processing flow. The method can solve the problem of individual parameter configuration failure in OLT end to ONU end parameter configuration in time.

The application provides an optical assembly and an optical line terminal. The optical assembly is composed of a transmitting unit, a wavelength division multiplexing device, a first receiver, a second receiver, a lens element and an optical fiber interface. The transmitting unit is configured to transmit light including a first wavelength and a second wavelength. The lens element is configured to couple the light including the first wavelength and the second wavelength to the optical fiber interface and carry out beam transformation on uplink signals of a third wavelength and a fourth wavelength. Compatibility of a GPON and an NG-PON as well as compatibility of two kinds of corresponding ONUs in a network is realized; and thus smooth upgrading of the GPON system to the NG-PON system is realized.

Demultiplexer capable of coping with bit deviation of a comma code to suppress increase of operating frequency. The demultiplexer comprises a circuit (20) serially supplied with received data to perform serial-to-parallel conversion on the received data, a comma detection circuit (30) for activating a comma detection signal on detection of coincidence between the serial data transferred on parallel paths with clocks corresponding to received clocks halved in frequency and a comma code, and a control circuit (137-139, 40) for elongating and outputting the activated time duration of the comma detection signal by a predetermined time. The demultiplexer also includes a recovery clock generating circuit (50) composed of a state machine transferred between different states based on the frequency-halved clocks and which, on receipt of an output signal of a control circuit (40), varies the period of the recovery clock to output the resulting clock. The demultiplexer also includes first and second delay circuits (131-133, 134-136) and first and second shift registers (121-125, 126-130) for receiving outputs of the first and second delay circuits to convert outputs into parallel data. The demultiplexer also includes a latch circuit (70) receiving outputs of respective stages of the first and second shift registers in parallel and sampling parallel outputs with recovery clocks to output resulting parallel data. In case of occurrence of bit deviation, recovery clocks are elongated by a predetermined time duration for only one period depending on the state of bit deviation.

The invention discloses an optical module and a passive optical network with the same. The optical module comprises a master control unit, an optical emitting component integrate with a temperature controller, a temperature controller driving unit and a wavelength tuning unit. By the wavelength tuning unit and the temperature controller driving unit in the optical module, the emitting wavelength of the optical module can be conveniently adjusted by the master control unit of the optical module, wavelength adjustment manner is simple, and difficulty and cost for building the network by optical modules are reduced.

The invention discloses a fixed mobile convergence wavelength division access ring and an access method and relates to the metro area access field. The access ring takes CO OLT as a network convergent point to form annular topology, the ring internally comprises a main fiber and a standby fiber, each area business is accessed to OADM through R-OTU; under the main state, in a downlink direction, a signal sent by the CO OLT to the OADM realizes clockwise transmission in the main fiber; in an uplink direction, a signal sent by the OADM to the CO OLT realizes anticlockwise transmission in the standby fiber; in a standby state, after a node next to a fault point switches a signal to the standby fiber, a signal sent by the CO OLT to the OADM realizes anticlockwise transmission in the standby fiber, and a signal sent by the OADM to the CO OLT realizes clockwise transmission in the standby fiber. The fixed mobile convergence wavelength division access ring can satisfy low cost requirements of fixed access, mobile backhaul and robustness requirements of a great customer hotline, is convenient for network establishment and operation and maintenance, is consistent with trends of large bandwidth access and network flatness, is flexible in bandwidth distribution and is easy to upgrade.

The invention discloses a method for service protection in an automatic exchange optical network, which comprises: searching the idle protection connections other than the above partial connection in the protection group when needing to switch a work service on a partial connection in the connection of the protection group; switching the work service on the partial connection onto the idle protection connection if the idle protection connection is found; otherwise, switching based on the priority of the work service on the partial connection and the priority of work services on other protection connections except for the partial connection mentioned above. The invention can completely protect the services with high priority in the automatic exchange optical network rapidly and efficiently in limited network resources, thereby complying with the service level agreement (SLA).

An optical transmission apparatus that protects different types of signals with a common backup transponder. The optical transmission apparatus includes working transponder units that relay respective optical signals on corresponding working transmission lines to or from external client devices, a backup transponder unit that can relay optical signals of different interface types, a 3:1 optical switch unit and a 1:3 optical switch unit that connect the external client devices and the working transponder units, and can connect the external client device and the backup transponder unit, and a monitor control unit that monitors occurrence of a failure in the working transponder units and the backup transponder unit, and controls switching of the transmission lines upon detection of a failure.

A return path system includes inserting RF packets between regular upstream data packets, where the data packets are generated by communication devices such as a computer or internet telephone. The RF packets can be derived from analog RF signals that are produced by legacy video service terminals. In this way, the present invention can provide an RF return path for legacy terminals that shares a return path for regular data packets in an optical network architecture. The invention operates independently of a legacy upstream transmission timing scheme so that the legacy upstream transmission timing scheme can remain effective in preventing data collisions. In other embodiments, the present invention allows for less complex hardware for subscribers that are not taking data services. Further, an optical signal present line in combination with a driver may be employed in order to reduce the amount of hardware in a laser transceiver node.

Provided are a computer program product, system, and method for resource allocation in accordance with one embodiment of the present description, in which a resource allocation such as a buffer credit allocation for a port in a storage area network is initialized as a function of a measurement of a length of a communication link for the port of the storage area network. In one embodiment, the length measurement is a function of a minimum command response time of a command issued over the communication link. Other aspects of resource allocation in accordance with the present description are described.

A disclosed method for extending reach in an adaptive optical network may include selecting, for an optical channel having a given target distance and a given maximum data rate, the modulation format having the highest spectral efficiency among modulation formats supported in the adaptive optical network that are suitable for optical channels having the given target distance and the given maximum data rate, determining a symbol rate for the optical channel dependent on characteristics of transmission media for the optical channel, determining a number of subcarriers for the optical channel corresponding to the determined symbol rate, and activating subcarrier multiplexing (SCM) for the optical channel. Activating SCM may include configuring transponders to transmit or receive the traffic in the optical channel using the selected modulation format and the determined number of subcarriers. The method may be implemented by a network management system of the optical network.

The invention discloses a long-distance box and a method for processing uplink and downlink light thereof. The method for processing uplink and downlink light comprises the steps of: shunting the uplink/downlink light (uplink light and downlink light) from different passive optical network (PON) systems; transmitting the uplink/downlink light from different PON systems through different optical channels; and processing the uplink/downlink light from different PON systems in different optical channels by long-distance amplifying boxes of corresponding systems, and then outputting the light to optical line terminals (OLT)/optical network units (ONU) of the systems respectively. In the method for processing uplink and downlink light, the uplink/downlink light of different PON systems is shunt to different optical channels, and the long-distance amplifying boxes corresponding to the shunt uplink/downlink light of the PON systems respectively are arranged in the different optical channels, thus a simple and reliable solution is provided for an operator for solving the same long distance problem of a plurality of PON systems; in addition, a plurality of traditional single-system long-distance amplifying boxes are combined organically, the system is changed to the minimum extent, the reliability and the efficiency are highest, and time and cost are saved for the operator.

Information about an attribute of packets that are receivable corresponding to a command is registered. When a packet is received, information about an attribute of the packet received is acquired. Upon occurrence of a reception error that there is no information in the attribute registering unit corresponding to the information acquired by the attribute acquiring unit, a predetermined reception error handling routine is executed according to a type of the reception error.

The invention discloses a SNCP business configuration method. SNCP protection group comprises first access and second access, and establishes restoration access for first access with trouble, composes a new SNCP protection group by second access and restoration access, executes predetermined processing for SNCP business configuration under predetermined condition. The predetermined condition is that new SNCP protection group and SNCP protection group shares common access and SNCP business intersects the second access of new SNCP protection group, and that SNCP configuration of SNCP protectiongroup is modified while SNCP intersection relation is not changed in predetermined processing. The invention can reduces transient interruption times of SNCP business.

The present invention discloses a method for realizing interaction multicast in PON (passive optical network), being characterized by receiving the multicast policy management entity and the multicast user information entity, wherein the multicast policy management entity comprises a dynamic access control list ACL; and the multicast user information entity and the ACL entry of the multicast policy management entity have a corresponding relationship; receiving the internet group management protocal IGMP joint message; acquiring the multicast user information carried by the IGMP joint message; looking for the multicast user information entity being matched with the multicast user information acquired from the IGMP joint message; determining uniquely and looking for the ACL entry corresponding to the multicast user information according to the corresponding relationship between the multicast user information entity and the ACL entry; and establishing a two-layer forward entry according to the uniquely determined ACL entry. Besides, the present invention also discloses a system and device for realizing interaction multicast in PON.

The invention relates to a wave channel balancing route wavelength allocation method of a power backbone optical transport network. The method comprises the steps of: obtaining information of each link of the network according to a network topological structure; establishing balancing paths among nodes in the networks; calculating a wave channel utilization rate of each link in the network; according to a wave channel balancing rule, carrying out routing on transmission business; according to business service quality requirements, dividing business levels, wherein, each level of business is corresponding to a corresponding wavelength level group; when business arrives in the network, firstly calculating path from a source node to a target node for the business, selecting the corresponding wavelength group according to the priority level of the arrived business, and allocating a usable wavelength to the business according to an intra-group priority allocation rule; if no usable wavelength is available, rejecting the business; and updating the number of usable wavelengths of each link, and carrying out wave channel allocation for next business. According to the invention, the wavelength utilization rate of each link in the network is effectively balanced, congestion conditions caused by overloads of partial links are reduced, and stable and reliable operation of the network is ensured.

The provided light-carrying wireless communication system comprises: an OADM embedded in remote station, an OXC to transmit with central station by two-way dual-fiber or single-fiber different-waveform, a core router connected with both OXC and OADM. This invention combines wireless mobile technique and optical network.

The invention relates to the smart grid communication by utilizing a switch chip to realize OPGW (optical power ground wire), in particular to a smart grid communication channel realization device of OPGW by utilizing an Ethernet switch chip to realize optical-fiber serial relay communication. The device comprises an optical module 1 (101), an Ethernet switch chip (102), an optical module 2 (103) and an electric port (104); the optical module 1 (101) is connected with an optical interface 1 of the Ethernet switch chip (102); the optical module 2 (103) is connected with an optical interface 2 of the Ethernet switch chip (102); the electric port (104) is connected with an electric interface of the Ethernet switch chip (102); the Ethernet switch chip (102) can adopts a switch chip manufactured by Broadcom company, MARVELL company, RELTEK company, IC+ company or the MICREL; and the optical module 1 (101), the Ethernet switch chip (102), the optical module 2 (103) and the electric port (104) forms an Ethernet switch module.

The present invention provides a method for releasing data of a storage apparatus. The method manages the data output of the storage apparatus by using a virtual output queue, a data storing memory, and a bit map output port memory. In such method, the output ports, which use the data stored in any data column of the data storing memory, are recorded in the bit map output port memory. In addition, the addresses of the data storing memory for storing the data output from any output port are provided by the virtual output queue. After all data of a certain data column is completed read out, the data storing column in the data storing memory and a corresponding part of the bit map output port memory are released by the storage apparatus.

The invention discloses a spectrum defragmentation trigger method based on spectrum sensing in an elastic optical network. The spectrum defragmentation trigger method comprises the following steps that step (1): the spectrum availability before defragmentation and the business demand degree are calculated; step (2): the spectrum availability before defragmentation and the business demand degree are compared, and spectrum defragmentation is not required when the spectrum availability before defragmentation is greater than or equal to the business demand degree; and the spectrum availability after defragmentation is calculated when the spectrum availability before defragmentation is less than the business demand degree, and the step (3) is performed; and step (3): the spectrum availability after defragmentation is compared with the business demand degree, and the spectrum defragmentation mechanism is triggered when the spectrum availability after defragmentation is greater than or equalto the business demand degree; and spectrum defragmentation is not required when the spectrum availability after defragmentation is less than the business demand degree. The spectrum defragmentation trigger method has the advantages of increasing the success rate of network business transmission, reducing network business blocking rate and enhancing the network resource utilization efficiency.