Motorola Corporation

Wintegra Ltd.

Eran Kirzner

Avi Hagai

Ronen Weiss

Ricardo Berger

Yoram Yeivin

Itai Katz

Dovrat Zifroni

Yuval Lachman

A method for determining at least one parameter for a particular AAL2 channel identifier (AAL2-CID), according to which the behavior of the transmission of the user information stream is determined per application. Preferably, the present invention enables the QOS (quality of service) for the user application to be determined by setting a plurality of such parameters for a specific AAL2 CID. The present invention preferably encompasses the ability to determine any parameter that is usually set for the ATM channel to instead be set for the CID separately. These parameters may be dynamically adjusted according to the real-time state of the system, channel and the specific CID. Additionally the selection and usage of said parameters may also be influenced by the real time state of the system, channel and the specific CID. Examples of such parameters include, but are not limited to, traffic type, priority, any type of QOS parameter, timing parameters, and so forth.

[object Object]

In some embodiments of the present invention, applications presenting user information streams at a service access point (SAP) to AAL-2 above the Common Part Sublayer (CPS) may provide values for predefined parameters that may determine how frames of information in the user information streams are segmented in run-time into CPS packets and packed into CPS protocol data units (CPS-PDU), each of which forms the payload of an ATM cell. These parameter values may be defined per channel identifier (CID) or for a group of CIDs.

Method and apparatus for dynamic bandwidth allocation for voice and data multiplexing over AAL-2 connections

A reassembly unit comprising of a reassembly buffer and a control unit and a detector. The reassembly unit monitors an amount of data AMD stored in the reassembly register and compares AMD to four thresholds, TS1, TS2, TS3 and TS4. TS1 and TS4 define the size of the reassembly buffer. TS2 defines the delay of reassembly unit 40. A difference between TS1 and TS2 defines an underflow recovery period in which data is not read out of the buffer. A difference between TS4 and TS3 define an overflow recovery period in which data is not written in the buffer. The four thresholds can be changed during an operation of the reassembly unit, allowing a user to adjust the thresholds according to the state of the reassembly unit.

Reassembly unit and a method thereof

A system and a method of the present invention for implementing a combined use Timer_CU within an ATM transmitter. The ATM transmitter being able to handle a plurality of ATM channels, at least one of the channel being an ATM AAL2 channel. The ATM channels can provide ATM-cells at different traffic parameters, such as, for example, different cell or bit rate, priorities, and bursts. The system schedules channels in a first table by channel identifiers. Cyclical pointers to this first table advance (i) at every time slot, (ii) within a time slot, whereas (iii) CPS-Packets with one or more octets already packed wait at most the duration of a Timer_CU before being scheduled to be sent by CPS transmitter to ATM transmitter. Conveniently, the schedule scheme is based upon a scheduling table comprising of a plurality of time slots. CPS-Packets are multiplexed and packed to form a CPS_PDU, the CPS_PDU is submitted to a processor that handles the transmission of ATM cells, each CPS_PDU is converted to an ATM cell and transmitted to a communication channel during a single time slot. Therefore, Timer_CU ends when the ATM cell actually is transmitted.

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Rishon Lezion, Israel

Eran Kirzner