85 results about "Generic Framing Procedure" patented technology

In order to facilitate the transport of 1 Gbit / s Ethernet signals over an Optical Transport Network using the Optical Transport Hierarchy as specified by ITU-T G.709, a new OTH entity referred to as Optical Channel Data Unit-0 (ODU0, 101) with a capacity of approximately 1.22 Gbit / s is defined. This new entity fits perfectly into the existing OTH multiplexing structure, allowing the transport of two times a 1 Gbit / s Ethernet client layer signal within the capacity of one ODU1 (110), while being individually switchable. A 1 Gbit / s Ethernet signal (102) can be mapped into the ODU0 payload (103) using the Transparent Generic Framing Procedure (GFP-T) encapsulation technique as specified in Rec. G.7041.

The invention relates to a method for transmitting a plurality of antenna signals in a wireless Base Transceiver Station (BTS) using Remote Radio Head (RRH) technology and the corresponding system. The method includes the steps of: transmitting signals over the transmit channel using Synchronous Digital Hierarchy (SDH) / Optical Transmission Network (OTN), multiplexing the plurality of antenna signals adopting the manners of time division multiplex or GFP frame-level multiplex; forming the multiplexed antenna signal stream and in-band control signaling stream into Generic Framing Procedure (GFP) frame; or forming the plurality of antenna signals and the plurality of respective control signals on the in-band control signaling channel into a plurality of respective GFP frames in parallel; and further mapping the GFP frames to STM-N / OTM-n frames, therefore multiplexing the plurality of antenna signals and the in-band control signaling stream to realize the SDH / OTN-based transmission. According to the invention, in the circumstance of using a plurality of antennas for transmitting signals, the strict time and phase relations between various antenna signals can be ensured, and also system complexity can be simplified, the transmission delays from various antenna signals to CBTS are totally the same.

A network element employing a universal mapper enables multiple services to be mapped onto a physical medium (metallic link with a particular physical layer protocol) so that the number of service mappers, and hence the complexity of the network element, may be reduced, the cost of provisioning the device may be reduced, and new services may be deployed, such as Ethernet over T1. The universal mapper may be configured to generate frames for transmission over multiple physical mediums utilizing a protocol known as Generic Framing Procedure (GFP). Using this embodiment, services such as ATM, Frame Relay, Ethernet, IP / PPP, Voice, and Infiniband may be transported in GFP frames over metallic links operating using xDSL, T1 / E1, T3 / E3, or cable access technologies by utilizing a single GFP framer and a single set of service mappers.

An optical transponder includes a mapping unit mapping, out of multiple types of signals including a first client signal and a second client signal that transmission rates are different from each other, the first client signal having a lower transmission rate to a Generic Framing Procedure (GFP) frame defined in ITU-T Recommendations; a coding unit applying 64B / 66B coding to the first client signal mapped to the GFP frame; and a multiplexing unit multiplexing the first client signal to which the 64B / 66B coding has been applied and the second client signal in a frame conforming to an Optical Transport Network (OTN) defined in ITU-T Recommendations; in which the first client signal and the second client signal are accommodated in an identical frame in a mixed manner and transmitted as an optical signal having one wavelength.

The invention relates to a method for transmitting a plurality of antenna signals in a wireless Base Transceiver Station (BTS) using Remote Radio Head (RRH) technology and the corresponding system. The method includes the steps of: transmitting signals over the transmit channel using Synchronous Digital Hierarchy (SDH) / Optical Transmission Network (OTN), multiplexing the plurality of antenna signals adopting the manners of time division multiplex or GFP frame-level multiplex; forming the multiplexed antenna signal stream and in-band control signaling stream into Generic Framing Procedure (GFP) frame; or forming the plurality of antenna signals and the plurality of respective control signals on the in-band control signaling channel into a plurality of respective GFP frames in parallel; and further mapping the GFP frames to STM-N / OTM-n frames, therefore multiplexing the plurality of antenna signals and the in-band control signaling stream to realize the SDH / OTN-based transmission. According to the invention, in the circumstance of using a plurality of antennas for transmitting signals, the strict time and phase relations between various antenna signals can be ensured, and also system complexity can be simplified, the transmission delays from various antenna signals to CBTS are totally the same.

To allow performance monitoring of the end-to-end path from the Ingress node to the Egress node of the GFP network by an FCS (Frame Check Sequence) check in a GFP (Generic Frame Procedure) frame, the FCS generation target area is set in the payload field of the GFP frame, no FCS recalculation is performed at the relay node and the GFP frame is transferred to the next node with the FCS added when the GFP frame is received even if an error is detected by the FCS check.

A sequence identification number is added to a header in each Generic Frame Procedure (GFP) frame. The byte sequence identification number identifies frames, preventing duplication or loss of exchanges, sequences, and frames. When this feature is enabled, a remote wavelength division multiplexing (WDM) node automatically checks the header to ensure that no duplication or loss occurs. The remote WDM node does not need to buffer data, instead the remote WDM node only needs to keep track of the sequence identification number information. A sequence identification number is also added to the header information, which allows the WDM node to keep track of which session was under way in the event that all connections between nodes across the WDM network are lost.

The invention relates to a method of signal transmission between a host BTS and Remote Radio Unit(s), and the BTS communication system thereof. The transmission channel between the host BTS and the Remote Radio Unit(s) uses wideband transmission links or a network, the method includes the following steps of: performing the transmission over the transmission channel using a Synchronous Digital Hierarchy (SDH) / Optical Transmission Network (OTN), forming a digital wireless signal data stream and an in-band control signaling stream transmitted over the transmission channel into a Generic Framing Procedure (GFP) frame which is further mapped to a STM-N / OTM-n frame, thereby multiplexing the digital wireless signal data stream and the in-band control signaling stream to realize SDH / OTN-based transmission. As a result, the wireless signal can be effectively transmitted between the RRH and the host BTS without specific transmission network, and the management and maintenance operation required by the signal transmission and the networking cost can be reduced.

An optical transponder includes a mapping unit mapping, out of multiple types of signals including a first client signal and a second client signal that transmission rates are different from each other, the first client signal having a lower transmission rate to a Generic Framing Procedure (GFP) frame defined in ITU-T Recommendations; a coding unit applying 64B / 66B coding to the first client signal mapped to the GFP frame; and a multiplexing unit multiplexing the first client signal to which the 64B / 66B coding has been applied and the second client signal in a frame conforming to an Optical Transport Network (OTN) defined in ITU-T Recommendations; in which the first client signal and the second client signal are accommodated in an identical frame in a mixed manner and transmitted as an optical signal having one wavelength.

Methods, systems, and storage media enable the transport of InfiniBand (IB) data over a synchronous optical network (SONET) using generic frame procedure (GFP) encapsulation. User protocol identifiers for IB data in a GFP-SONET frame are defined. A process for maintaining running disparity of data during GFP encapsulation of IB data is provided. Data rate adaptation for this encapsulation is also provided. A simple, cost-effective scheme for data rate compression ensures that IB data is contained within a minimum SONET data rate traffic.

An interworking device, method and system distribute reference timing between at least two communication networks. The interworking device includes a first communication interface operable to communicate with a first communication network operating using a first communication protocol and a second communication interface operable to communicate with a second communication network operating using a second communication protocol. The interworking device also includes a client generic framing procedure / optical transport network (“GFP / OTN”) mapping block in communication with the first communication interface and the second communication interface. The client GFP / OTN mapping block recovers a first reference timing signal from data received from the first communication network. At least one hybrid synchronous equipment timing source transforms the first reference timing signal into a second reference timing signal that is phase and frequency locked to the first reference timing signal, and supplies the second reference timing signal to the client GFP / OTN mapping block to clock the second communication network.

The present invention relates to network transmission technologies, and provide a Generic Framing Procedure (GFP)-based add / drop multiplexing (add / drop multiplexing) method, apparatus and system to improve add / drop multiplexing utilization, in which multiple Gigabyte Ethernet (GE) connections among multiple nodes are multiplexed in GFP to a byte synchronous interface for transmission, wherein a bandwidth of the byte synchronous interface is smaller than a sum of peak bandwidths of the group of GE connections borne on the byte synchronous interface; statistical multiplexing is carried out on effective data borne on the multiple GEs by means of buffers, and the effective data are treated by priority in the case of network congestion. The present invention implements statistical add / drop multiplexing for multiple data services in various types, and can be used in implementing a statistical ADM for diverse data services in burst mode, even a statistical ADM for multiple mixed services.

A method for transmitting high-level PDUs (Protocol Data Units) over low-level protocol and method for transmitting MPLS (Multi-protocol Label Switch) PDUs so as to improve transmission efficiency, resource utilization, and network performance of MPLS network traffics. The method for transmitting MPLS PDUs includes the following steps: A. adding the pending MPLS PDU to PIA (Payload Information Area) field of a GFP (General Framing Procedure) data frame; B. transmitting the GFP data frame to the destination node via a transmission network; C. retrieving the MPLS PDU from the PIA field of the GFP data frame at destination node.

A method for Generic Framing Procedure (GFP) encapsulation includes: cascading a plurality of protocol data units to form a cascaded packet; and encapsulating the cascaded packet to obtain a GFP frame. A device for GFP encapsulation includes a cascading module, for cascading a plurality of protocol data units to form a cascade packet, and a GFP encapsulation module, for encapsulating the cascade packet to obtain a GFP frame. According to the method and the device, the occupation rate of the payload in a single GFP frame is increased and thus transmission efficiency is improved.

An interworking device, method and system distribute reference timing between at least two communication networks. The interworking device includes a first communication interface operable to communicate with a first communication network operating using a first communication protocol and a second communication interface operable to communicate with a second communication network operating using a second communication protocol. The interworking device also includes a client generic framing procedure / optical transport network (“GFP / OTN”) mapping block in communication with the first communication interface and the second communication interface. The client GFP / OTN mapping block recovers a first reference timing signal from data received from the first communication network. At least one hybrid synchronous equipment timing source transforms the first reference timing signal into a second reference timing signal that is phase and frequency locked to the first reference timing signal, and supplies the second reference timing signal to the client GFP / OTN mapping block to clock the second communication network.

Techniques described use Generic Framing Procedure (GFP) to transport data across an optical transport network between near and far Fiber Channel (FC) or Fiber Connectivity (FICON) local area optical networks. Each FC / FICON edge node (FCE) on an edge of the optical transport network has multiple modes for processing FC / FICON frames transported across the optical transport network. The techniques include receiving, at a near FCE from a far FCE, a GFP control plane message that includes a mode field that holds data that indicates a far mode, wherein the far mode is used at the far FCE. It is determined whether a near mode used by the near FCE matches the far mode based on the mode field. If it is determined that they do not match, then an alert is caused. These techniques allow software to utilize existing GFP chips in FCE that use optional processing, such as distance extension.

Provided is an apparatus for matching Gigabit Ethernet (GbE) signals to an Optical Transport Hierarchy (OTH). The apparatus real-time records a source address and input port information of GbE Ethernet frames in a memory, compares a destination address of the Ethernet frame which is a payload of a GFP frame with memory table information, searches an output port location of the GbE, and interreceives GbE frames and Generic Frame Procedure (GFP) frames by multiplexing / demultiplexing.

The embodiment of the invention discloses a processing method of data in an OTN (optical transport network). The processing method comprises the following steps that Ethernet data frames sent by an etheric plate net plate are received and cashed through an ILK (Interlaken) interface; the Ethernet data frames are encapsulated into GFP (generic framing procedure) data frames; and the GFP data frames are mapped into an OTN virtual container to form OTN data frames, and in addition, the OTN data frames are transmitted to a corresponding transparent transmission plate through a cross plate. The embodiment of the invention also discloses a processing device and a processing system of data in the OTN. When the method, the device and the system are adopted, the problem of too many Ethernet interfaces in the prior art can be solved.

The invention discloses a frame synchronization method and apparatus. The method comprises the steps of converting generic framing procedure data of each channel of a plurality channels into a path of time division data which carries a channel identifier of the corresponding channel; and performing frame delimitation of each path of time division data after conversion based on the channel identifier carried in each path of time division data.

The invention refers to a method of transmitting Ethernet data frames from a first local area network (LAN) to a second local area network (LAN) comprising mapping Ethernet frames from the first local area network onto Plesiochronous Digital Hierarchy format via Generic Framing Procedure (GFP) and transmitting the mapped Ethernet frames via a one or multiple En streams to an optional SDH-level network. The transmission is received at the second local area network through the optional SDH-level network via one or multiple En streams-network, and the Ethernet frames are demapped from the first local area network via Generic Framing Procedure, and transmitted into the second local area network.

A method is disclosed for controlling the flow of packets aggregated from multiple logical ports over a transport link. A directed flow control indicator is provided to the transmitting end station that causes a detected congestion condition. The directed flow control indicator causes the transmitting end station to suspend the transmission of further packets. The linear expansion header of the Generic Framing Procedure (GFP) linear mapping scheme is extended to include the flow control indicator, such as a bit that is set to a predefined binary value to indicate a potential overload condition. A directed flow control indication can be provided in one or more packets that are sent to the transmitting end station over the transport network without increasing the network overhead. If packets are not being sent to the appropriate transmitting end station, a packet generator can generate one or more packets with the flow control indicator to inform the appropriate transmitting end station of the congestion condition.

The present invention discloses a method of processing a generic framing procedure (GFP) frame, the method includes the steps of: processing the GFP frame by the compensating process of payload area descrambler error multiplication factor; and processing the GFP frame by the process of tHEC or / and eHEC single-bit error correction. According to the present invention, not only a tHEC or / and eHEC single-bit error can be corrected, but also the tHEC or / and eHEC additional single-bit error can also be corrected so that the equipment's dependability and capability of anti-interference are improved significantly.

The invention includes a method and apparatus for transporting a Multiprotocol Label Switching (MPLS) frame over a communication link. In the egress direction of communication, a method includes encapsulating the MPLS frame within a Generic Framing Procedure (GFP) frame, forming an augmented frame by adding at least one Ethernet Media Access Control (MAC) header field to the GFP frame, and transmitting the augmented frame over the communication link. In the ingress direction of communication, a method includes receiving an augmented frame over a communication link, removing at least one Ethernet Media Access Control (MAC) header field from the augmented frame to extract thereby a Generic Framing Procedure (GFP) frame, and decapsulating the MPLS frame from within the GFP frame.

A sequence identification number is added to a header in each Generic Framing Procedure (GFP) frame. The byte sequence identification number identifies frames, preventing duplication or loss of exchanges, sequences, and frames. When this feature is enabled, a remote wavelength division multiplexing (WDM) node automatically checks the header to ensure that no duplication or loss occurs. The remote WDM node does not need to buffer data, instead the remote WDM node only needs to keep track of the sequence identification number information. A session identification number is also added to the header information, which allows the WDM node to keep track of which session was under way in the event that all connections between nodes across the WDM network are lost.

The invention relates to a method for transmitting internet administrator instructions by employing general purpose frame procedures (GFP) characterized by that, the GFP administration and instruction function is expanded and reinforced, a GFP network administration frame and a GFP instruction frame are defined, wherein GFP client data frames, client administration frames and idle frames are subject to statistic multiplexing and transmission based on priority level, the priority levels for GFP network frames and GFP instruction frame transmission are configured to be the highest, and the GFP network administration frame and the GFP instruction frame are only transmitted when information exist instead of a timing basis.

The disclosure claims a bandwidth adjustment method and system for Optical channel Data Unit flexible (ODUflex) based on a Generic Framing Procedure (GFP), wherein, the method includes that: (501) a source end sends a bandwidth adjustment control frame which contains bandwidth adjustment parameters; (503) a plurality of intermediate nodes forward the bandwidth adjustment control frame to a sink end via an ODUflex link, during the forwarding process, the plurality of intermediate nodes determine that resource thereof can satisfy the bandwidth adjustment parameters, and then reserve the bandwidth adjustment resource; (505) after receiving the bandwidth adjustment control frame, the sink end feeds back an adjustment acknowledgment frame which contains adjustment acknowledgment information to the source end via the plurality of intermediate nodes; (507) the plurality of intermediate nodes use the reserved bandwidth adjustment resource to implement adjustment for the bandwidth of the ODUflex link according to the adjustment acknowledgement information of the adjustment acknowledgment frame. The disclosure realizes the bandwidth adjustment for the ODUflex without interrupting an existing service by increasing an Optical channel Payload Unit (OPU) overhead for the bandwidth adjustment in the ODUflex (GFP) frame.

The invention relates to a device for realizing multi-path different data service integrated transmission, and relative method, wherein said device comprises: a data service code distribute unit for decoding the code based on accessed data service type and transforming it into the code that recognized by the general frame forming process, or transforming the code that recognized by the general frame forming process into the accessed data service type; a speed adapt unit for adapting the data service speed and the frame forming speed of general frame forming speed; a general frame forming process projection collection / de-projection de-collection unit for realizing the projection / de-projection and collection / de-collection of multi-path different data services; an optical transmission projection / de-projection unit for projecting the frame of general frame forming process into the optical transmission network or de-projecting. The invention can save the optical fiber source, improve the bandwidth utilization and support the maintenance and management of network via building the internal personal communication channel.

Disclosed are a method of and system for enabling the transport of timer protocols over a generic frame procedure (GFP) network. The method comprises the steps of transmitting a defined optical initialization sequence to a GFP mapper, and using that GFP mapper to detect the optical initialization sequence and to generate a specified GFP frame to represent the initialization sequence. This specified GFP frame is recognized as a control frame for timer initialization. In a preferred embodiment, the timer protocol uses biphase encoding to encode clock data, and the method comprises the further steps of recovering clock data from a data stream that uses the biphase encoding, detecting a clock rate in that data stream, and using a look up table to map said detected clock rate into a specific code for said control frame.