85 results about "Generic Framing Procedure" patented technology

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.

A communications network provides a carrier Ethernet service without requiring the client signal to be identified by an Ethertype in a carrier Ethernet frame. A plurality of differing types of client signals can thus be encapsulated within the same carrier Ethernet service channel by using a generic framing procedure adaptation layer. The client signals are adapted for encapsulation within the carrier Ethernet frames by mapping the client signal within a generic framing procedure adaptation layer signal and then by mapping the generic framing procedure adaptation layer signal into the carrier Ethernet signal. As the client signal is identified within said generic framing procedure signal only a generic framing signal Ethertype is required. The mapping protocol enables a single Ethernet frame to carry a plurality of client signals.

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.

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.

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.

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.

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.

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 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 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.