59 results about "ATM adaptation layer" patented technology

To achieve an improved support for introduction of server pools in packet networks and further to achieve transpa ency for applications che present invention provides a communication apparatus running a protocol stack implementation for interworking between a signaling source node and a signaling target node. The communication apparatus comprises a first protocol implementation unit (SCTP) adapted to run a signaling control layer on top of a packet transfer network (IP) for exchange of signaling messages via at least one signaling association. Further, the communication apparatus comprises a second protocol implementation unit (SUP, M3UA) adapted to run a user adaptation layer on top of the signaling control layer (SCTP) for support of signaling connection control services (RANAP) used by the signaling source node. A name mapping unit is adapted to receive a signaling target node name from the signaling source node and to map the signaling target node name into a peer signaling association.

Techniques for exchanging point to point protocol (PPP) information among network nodes using an arbitrary network protocol include determining whether a PPP payload includes PPP control data. If so, then an outbound protocol frame is generated with the PPP control data in a payload and with an outbound protocol type field that indicates PPP control data. The outbound protocol frame is sent to a server which uses the PPP control data. The outbound protocol is different from PPP and from PPP over Ethernet (PPPoE) and from PPP over Asynchronous Transfer Mode (ATM) protocol (PPPoA). The outbound protocol may be Ethernet or ATM Adaptation Layer (AAL) or some other protocol. These techniques allow PPP control plane functionality while utilizing IP over Ethernet for the data plane.

System and method for correlating multiple frames of data associated with a single call into a call record. One embodiment comprises correlating data in a radio access network by capturing data passing to and from a radio network controller, identifying ATM Adaptation Layer type 5 (AAL5) frames within the data, assigning a first call identifier to the AAL5 frames, identifying ATM Adaptation Layer type 2 (AAL2) frames within the data, assigning a second call identifier to the AAL2 frames, and combining AAL2 frames and AAL5 frames having a same first call identifier and a same second call identifier into a call record. The data passing to and from the first radio network controller may be data passing over an Iub interface between a Node B and the radio network controller or data passing over an Iur interface between two radio network controllers.

A method and apparatus are disclosed for transferring data through a shared communication medium between communication devices. In at least one embodiment, a timeout period used to detect data transfer errors may be modified based, at least in part, on a data transfer status message transmitted from a media access control (MAC) layer to a protocol adaptation layer of a first communication device. The data transfer status message may include a status and an expected duration of a pending data transfer. In another embodiment, The timeout period may be modified based, at least in part, on data transfer statistics transmitted from the MAC layer to the protocol adaptation layer. Data transfer statistics may be accumulated by the MAC layer and may include data transfer size, data throughput rates, and number of re-attempted data transfers.

A method and apparatus are disclosed for ATM Adaptation Layer (AAL) staggered constant bit rate cell scheduling. Cells from a plurality of virtual circuits are scheduled. Each of the virtual circuits have a transmission characteristic and each of the plurality of virtual circuits are classified into one of a plurality of stagger groups based on similar transmission characteristics. For each frame synchronization, a cell is transmitted from a given virtual circuit until a predefined cell threshold is exceeded for the stagger group containing the given virtual circuit. A Cell Delay Variation of each of the virtual circuits will not exceed a given time interval. A scheduler can be allocated for each connection or for each period.

The present invention provides an apparatus, system and method for transmitting asynchronous transfer mode (ATM) data cells on an ATM adaptation layer (AAL) configured connection within an ATM system comprising a digital signal processor (DSP) sub-system (160) and a host processor (190). The transmitter interfaces directly with the DSP sub-system (160) (which converts the digitized voice samples into voice signals) and the host processor (190) (which performs AAL2 signaling and layer management functions). The transmitter is configured to interleave AAL2 voice packets from the DSP sub-system (160) and signaling and management packets from the host processor (190) on an ATM connection. Data is fetched by DMA(s) (415). A channel look-up table uses the DSP assigned voice channel as an index into the table to map a voice channel to the ATM connection.

An adaptive communication system of an automobile electronic device based on serial ports is used for transmitting relevant information from a peripheral device to a vehicle-mounted core device. The system comprises a plurality of serial ports for inputting or outputting relevant information. Communication is conducted through the serial ports according to protocols. The adaptive communication system is characterized by comprising a serial port resource management layer providing different serial port resources in time-sharing mode, a protocol adaptation layer for managing the protocols of the peripheral device, a protocol analytic sheaf for analyzing a data field and a business processing layer for conducting relevant business processing. The system is provided to different peripheral devices to be used in time-sharing mode according to actual requirements, and a client can select through a remote monitoring platform or conduct selection through local operation of drivers on cars. The system can still be adapted to various peripheral devices under the condition of limited serial port resource, the vehicle-mounted system is adaptive to a collecting device supporting a plurality of serial ports, and good effects of saving development and maintaining cost are achieved.

A method of routing an ATM cell in an ATM network and routing an ATM cell and a structure of an ATM adaptation layer in an ATM network. Data based on an ALL-Type2 (ATM Adaptation Layer Type2) and an AAL-Type5 (ATM Adaptation Layer Type5) is transferred to the same destination. This enables data based on ATM adaptation layers of different types to be transferred to the same destination at the same time.

First, SDU data is received in procedure of recombination. Whether type of ATM adaptation layer is AAL2 or AAL5 is determined. Then steps of look-up table, verification, recombination, transmission and updating are implemented to realize mixed recombination. Unit data of service data are received first at banding phase. Based on length of data unit in AAL type setting protocol, banding, PDU generation and sending steps are implemented to realize mixed banding. Since AAL2 SSCS and AAL5 CPS is realized unitedly as well as ATM layer and mixed SAR treatment module are shared, the invention possesses advantages of reducing difficulties and cost for developing software and hardware, reducing maintenance cost caused by unitive method. Under invariable total flow, dynamic load adjustment can be carried out by mixed SAR module.

A vibration limit switch system and related method is provided with a piezoelectric transmitting- and/or receiving unit, in operable connection with a membrane that can be put in oscillation, and a mechanical oscillation arrangement that is coupled to the membrane, whereby the piezoelectric transmitting- and/or receiving unit is adhered directly, or via an adaptation layer by an adhesive layer, to the membrane 4. In this improvement, the adhesive layer between the membrane and the transmitting-and/or receiving unit or the adaptation layer has a thickness in an edge area R which thickness is elevated in comparison to a central area Z. This thickness is arranged in differing geometries and amounts to further improve performance.

The ATM transmitting apparatus for transmitting messages, such as frame relay packets, associated with a plurality of connections comprises ATM layer transmission equipment for receiving multiple messages, segmenting each received message into a plurality of smaller data units, such as 48 byte AAL SAR protocol data units, and multiplexing such data units into a single stream for transport over a physical interface. A scheduler receives messages from each of the connections and transfers the messages to the transmission equipment. The scheduler can dynamically set a transmission rate for any connection, and allocates each connection whose message is transferred to the transmission equipment a substantially maximal amount of bandwidth at any given time during the transmission of the message, to thereby minimize interleaving of data units from the various connections and reduce the average latency (per unit of message) in transmitting the messages across a network.

A system and method are provided to streamline at least a clock synchronization process for subsequent WiGig PALs once clocks in a first WiGig PAL transmitter and a corresponding first WiGig PAL receiver are synchronized. The unique layering structure of the WiGig 60 GHz standard affords an opportunity to streamline the clock synchronization process based on relationships between individual WiGig PALs, and that the WiGig PALs are directly on top of the WiGig MAC and PHY layers. A process for assisted cross-PAL/cross-layer clock synchronization affords significant reductions in an amount of time required to synchronize the clocks of multiple WiGig PALs based on leveraging an already synchronized clock pair in a first WiGig PAL transmitter/receiver pair to facilitate the clock synchronization of one or more subsequent WiGig PAL transmitter/receiver pairs.

MAC adaptation layer is introduced on data link layer of internal interface in interface unit and base band processing unit. The MAC adaptation layer comprises header of MAC adaptation layer and service data unit. The said header of MAC adaptation layer includes four fields: ID of link, message length ID, subsections ID of data packet and sequence number of subsection. Transmission service data include transmission data and receiving data. Advantages are high transmission efficiency and low processing spending. Comparing with prior art, the invention possesses features of simple processing mechanism and simplified program codes.

An encoding system includes a video coding layer (VCL) to generate slices when encoding multimedia data, a generic adaptation layer (GAL) to create, from the slices, a set of GAL units having a format that is generic to various transport systems, and a network adaptation layer (NAL) associated with a specific transport system to map the set of GAL units to the format of the specific transport system.