Telefonaktiebolaget Lm Ericsson (publ)

Sandra Collins

Francoise Sailhan

Thomas Walldeen

Erik Westerberg

Ann-Christine Eriksson

Liam Fallon

Ingemar Backlund

Daryl Parker

Samir Ghamri-Doudane

Samir Ghamri Doudane

Yang Cheng Huang

A traffic network having a wired as well as a wireless network backbone is managed. The wireless network backbone has relay nodes having wireless routers, some acting as gateways to the wired backbone network and some as relay bridge routers for access network access. A management system has a logical multilevel hierarchical network overlying the traffic network. It is adapted to use the relay nodes as management stations. It performs a grouping process by arranging network nodes, including the relay nodes, in groups, each with a cluster head, on different hierarchical levels. A grouping controller controls the grouping and allocation of cluster heads based on a number of grouping constraints given by one or more criteria to be fulfilled at each hierarchical level. The criteria are calculated based on given metrics, the constraints are modeled, and fulfillment of the constraints is verified at each hierarchical level.

Arrangement and method relating to network management

The present invention relates to a proactive optimized link state protocol and a node with routing means supporting such a protocol implementing multipoint relaying for distribution of control messages, e.g. comprising hello messages, which are extended and comprise neighbour information, link status information and resource related information, and second control messages, e.g. TC messages comprising information relating to MPR selectors which are extended to also hold information of a shared information repository () adapted to hold generic service related information. Internal information repositories () are extended to additionally hold resource related information for neighbours, neighbour links and multipoint relay selectors. The protocol implements cross-layer () communication.

Arrangement and method relating to routing of IP traffic in mobile wireless networks

A method ensures that a reduction in data throughput is minimized in the event of a cell change in a GPRS network. When it is determined that cell change is appropriate for a mobile station, the BSS ensures that no further data for the mobile station is transmitted form the SGSN, and then continues to transmit all buffered data to the mobile station. The throughput may be deliberately reduced for a part of this time, so that the system timers become adapted to the reduction in throughput which will occur at the cell change. When the buffer has been emptied, the cell change is effected and, thereafter, that mobile station is prioritised in the BSS, in order to allow any buffered data on the uplink or downlink to be cleared.

Method of data preservation and minimizing reduction in data throughput in the event of a cell change

A method ensures that data is not lost during an inter-Routing Area or inter-Network Service Entity cell change in a GPRS network. When a mobile station passes from one cell into another, a command is sent from the SGSN to the BSS serving the first cell, causing that BSS to discard any data awaiting transmission to the mobile station. A reply is sent from the BSS to the SGSN, and, in response thereto, the SGSN transmits data to the BSS serving the new cell, in order to ensure that all of the data intended for the mobile station is transmitted thereto.

Data preservation

Growing community of inventors

Dublin, Ireland

Sandra Collins