Telefonaktiebolaget Lm Ericsson (publ)

Lars-Göran Petersen

Ulf Erik Ekstedt

Patrik Wiss

Gunnar Larsson

David Comstock

Ulf Peter Hansson

Karl Anders Näsman

Ola Dagberg

Juan Noguera-Rodriguez

Mats Nils Fredrik Ernkell

Lars Göran Vilhelm Eneroth

Dan Hörlin

Ulf Ekstedt

A system and method are disclosed for switching a data flow of information packets intended for paths between a respective sending and receiving entity, the method includes buffering the packets from the paths in a queue; halting a sending entity on congestion of the queue; storing the halt condition in a switch state; noting the individual portions that different of the paths occupy in the queue; halting the sending entity for the path occupying the individually greatest portion of the queue; storing the halted path in a free one of the switch states including storing its bandwidth; successively updating the respective bandwidth of halted paths as the queue is repeatedly congested; determining an older part of the states; and purging the state for a path having the smallest bandwidth in said older part of the states.

Method and arrangement in a packet switch

The present invention relates to a method for transportation of user information in a core network (CN). The core network is located between a source access network (SAN) and a destination access network (DANB). The method comprises the following steps: collecting in a source center (MSCa) in the source network (SAN) of voice packets from source units () in the source network. The voice packets have the destination network (DANB) specified as receiving network; arranging of the collected voice packets into a payload part (IPPL) of an IP-packet (IP) in the core network (CN); transferring of the IP-packet in the core network (CN) from the source center (MSCa) to a destination center (MSCb) in the destination network (DANB).

Voice packets in IP network

The present invention refers to a gateway (MGW) in a telecommunication system (TS) enabling connections to be effectively established between various networks (N, N, N) in the telecommunication system. The gateway comprises resources from different nodes (RNC, MSC, IP, VX) of the various networks. Servers (S-S) from the networks are connected to the gateway (MGW) and co-utilize the resources, which contributes to the effective utilization of the resources. This effective utilization of the resources is supported by the resources being divided into resource groups. Specific ones of these resource groups can be utilized by solely each one of the servers. Consequently, important services such as alarm services and security services can always reach the necessary resources in the gateway. Other resource groups can be co-utilized by only a small number of the servers while additional resource groups may be co-utilized by all of the servers (S-). By division into the resource groups the resources of the nodes (RNC, MSC, IP, VX) are co-utilized without the establishing of specific significant connections having to be rejected.

Telesystem with coupling device and a method in connection therewith

Techniques are provided for sequencing user data packets (e.g., voice packets) segmented into plural AAL2 packets which are in turn carried over Internet Protocol (IP). Concerning segmented user data packets, the techniques of the present invention utilize one or more predetermined values in the length indicator (LI) field in the headers of the certain ones of the plural AAL2 packets to carry information other than packet size information. Further, the techniques of the present invention use the User-to-User indicator (UUI) field of the AAL2 packets to carry AAL2 information such as segmentation notification and sequence-derivable information. For AAL2 packets which carry non-segmented user data packets (e.g., user data packets which can fit with the maximum size of a single AAL2 packet), the length indicator (LI) field contains the actual length of the AAL2 packet in conventional manner.

Sequencing of user data packets segmented into AAL2 packets transported over internet protocol (IP)

The present invention relates to a coupling node (MG) for coupling of communications in a telecommunication system, comprising networks (NN) with different signal formats. The coupling node has switching and trunking functions (CPCP) corresponding to the signal formats, and telefunctions, e.g. coders/decoders (F) and echo cancellers (F), which the node can couple into a communication by means of a selector (PS). The functions are supported by printed board assemblies (CB&#x2013;CB) in magazines (SR), and the printed board assemblies have signal processors (DSP&#x2013;DSP) with access points (SAP&#x2013;SAP). The selector hunts one of the signal processors for handling one of the functions. If the processor has sufficiently free memory space in its data store and in its instruction memory and sufficient processor capacity, this processor is selected. Otherwise a new processor is hunted which is investigated in the same way.

Method and device in a coupling node for a telecommunication system

A method of indicating the length of a mini cells in a mobile telephony network. Non linear coding of a short fixed length field in the header of the mini cell is described. Either an extension bit method or an extension code method is used to extend the length field so as to increase the number of length values available for coding of the mini cell sizes. The length of a mini cell is indicated in the individual mini cell or is indicated indirectly using a CID/length mapping table. Mini cell sizes are changed during a connection and methods are described for doing this. Cell header reading devices for extracting user information of individual mini cells are described. A mobile telephone network using the cell header reading devices is described.

Mini cells with variable payload size

A switching node () has a semiconductor switch core () and plural switch port devices (). The semiconductor switch core comprises a two dimensional buffer matrix having one buffer memory () per crosspoint to which cells having differing priority classes are written. The switch core further has plural switch core ports (), with each of the switch core ports writing traffic cells to a row () of the matrix and reading traffic cells from a column () of the matrix. For each crosspoint of the matrix a high priority signaling element (H) is formed in the semiconductor switch core. A novel low priority cell flushing operation the present invention moots any cell blocking problems.

Priority signaling for cell switching

A media stream system () processes plural media streams (), e.g., speech streams or speech channels. The system comprises plural processors (), each of which execute one or more plural types of media stream processing functions (). A switch function () routes packets of the plural media streams to a sequence of the plural processors whereby the plural types of media stream processing functions are sequentially performed relative to the packets. A packet size for the packets is chosen to minimize overhead load on at least one of the plural processors without causing undue delay for a packet awaiting processing by the at least one of the plural processors. In an example non-limiting implementation, the packet size for a packet of media information is chosen to be 160 octets, consecutive packets of a same media stream being separated by a packet repetition interval which is 20 milliseconds.

Asynchronous packet processing using media stream functions

Method and apparatus for processing data in a multi-processor environment are provided. An application chain is built including at least one application to be performed on the data. The data is received, and program information, e.g., a pointer, is added to the data for identifying a current application in the application chain to be performed on the data. The data is forwarded to an available processor in the multi-processor environment and is processed using the current application identified by the added program information. The processed data is updated with new program information identifying a next application in the application chain to be performed, if any. The processed data is forwarded to an available processor, processed, and updated repeated times until the data is processed by all applications in the application chain.

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Tumba, Sweden

Lars-Göran Petersen