Telefonaktiebolaget Lm Ericsson (Publ)

Wei Zhao

Ying Sun

Konstantinos Dimou

Yufeng Zhao

Loa Andersson

János Farkas

Johan Kölhi

Tobias Tynderfeldt

Mikael Wittberg

Anders E Eriksson

Jingyi Liao

Börje Ohlman

Magnus Lindstråm

There is provided a method, performed by a network node, for enabling uplink power control in a wireless network. The method comprises assigning (S) a transmit power for downlink transmission of a reference signal, wherein the reference signal is to be used for power control of at least one uplink transmission. The method further comprises determining (S) a reference signal transmit power parameter providing a fictitious value for the transmit power of the reference signal that is different from the assigned transmit power. The method also comprises transmitting (S) the reference signal transmit power parameter to at least one wireless device to enable the wireless device(s) to perform transmit power determination for the uplink transmission(s) at least partly based on the fictitious value for the transmit power of the reference signal.

Power control in a wireless network

The disclosure relates to a method performed in a network node for allocating uplink reference signal resources. The network node is capable of uplink frequency selective scheduling and combined cell configuration. The network node is further arranged to provide wireless communication to a communication device. The method comprises configuring, when both uplink frequency selective scheduling and the combined cell configuration are enabled, a communication device for which uplink frequency selective scheduling is enabled with resources from a second set of resources and configuring other communication devices with resources from a first set of resources, and allocating uplink reference signal resources from the first set of resources or the second set of resources to the communication devices according to the configuration.

Method and devices for allocating uplink reference signal resources in combined cells

A method performed in a network node. The method includes the network node receiving a report regarding a traffic load of at least one network cell of a plurality of network cells. The method further includes the network node determining whether the traffic load of the at least one network cell is greater than an average traffic load of the plurality of network cells. The method further includes the network node adjusting a power of a reference signal based on said determining. The method also includes the network node transmitting the adjusted reference signal in the at least one network cell.

Method, network nodes, and computer program products for load based adaptive CRS power adjustment

The present teachings relates to methods performed in a network node of a wireless communication network. The method comprises: broadcasting one or more threshold values enabling the wireless devices to determine fulfillment of one or more criteria for selecting a contention based random access preamble either from a first preamble group or from a second preamble group for use in a contention based random access procedure; transmitting to a selected wireless device one or more threshold values using dedicated signaling, the one or more threshold values sent in the dedicated signaling overriding a corresponding broadcasted threshold value and being set so that the wireless device fulfills the criteria to select a preamble from the first preamble group, wherein the threshold values sent on the dedicated signaling differ from the broadcast threshold values; and prioritizing preambles of the first preamble group over preambles of the second preamble group.

Methods and devices for contention based random access

A radio network node (RNN) () and a method therein, for handling of changing primary cell from a first cell () to a second cell () during re-selection of primary cell of a user equipment (UE) (). The RNN is configured to serve the first cell, the UE is located within the first cell and is served by the RNN, and RNN and the UE are comprised in a communications system (). The RNN transmits an RRCConnectionReconfiguration signal to the UE, which signal comprises an indication that the UE does not need to perform a random access procedure for the second cell when changing primary cell from the first cell to the second cell.

Radio network node, a user equipment and methods therein

In order to provide a more robust contention-free random access procedure for use in a cellular wireless network and specifically, a contention-free random access procedure that is able to recover more quickly in case of failure a method for a radio access node () that is arranged in a wireless network and communications with user equipment, UE () and a radio access node are proposed. The method includes: receiving a first random access message () from a UE, the first message containing a pre-assigned contention-free random access preamble and representing a start of a random access procedure; responding to the received first message by sending a second message () to the UE, the second message containing time alignment information to enable a scheduled transmission of a third message () by the UE; ascertaining that no third message is received from the UE within a predetermined period of time and transmitting a command () to the UE ordering a restart of the random access procedure with the same pre-assigned contention-free random access preamble.

Contention-free random access procedure in wireless networks

The present invention relates to a method and arrangements for updating the mapping of traffic in the form of a set of service level aggregate flows (SLS, SLSM) to a set of partial resources (B, BN) for forwarding the traffic in a communications network (). Each service level aggregate flow corresponds to a service level associated with a set of service requirements. Information regarding traffic characteristics of each service level aggregate flow and performance of the set of network resources are obtained. Based on this information, the mapping of the set of service level aggregate flows to the set of network resources is updated to achieve a more efficient utilization of the set of network resources, while fulfilling the set of service requirements.

System and method for providing differentiated services

The present invention relates to methods and arrangements in an MPLS-TP network. comprising a plurality of interconnected routers configured for MPLS-TP, wherein at least a first router is defined as an originating Maintenance End Point, MEP, a second router is defined as a targeting MEP and the third router is defined as a Maintenance Intermediate Point, MIP. The basic idea of the present invention is to associate a table with each MIP and MEP, wherein the tables comprises information related to the MEPs of the MPLS-TP network and the information from the tables is inserted in the reply packets and forwarded packets. By using this information, the OAM packets can find the subsequent MIP or MEP and failure localization may be performed.

Methods and arrangements in an MPLS-TP network

A policy control architecture for handling policies in communication networks. An independent Identity Provider (IDP) generates IDP user terminal entries for policy control information. Policy controllers are logically divided into separate policy control units. Of these, a User Policy Controller (UPC) generates UPC user terminal entries for service subscriptions, and a Business Policy Controller (BPC) applies related policies on the services.

Policy control architecture comprising an independent identity provider

Embodiments herein relate to a method in a radio base station for enabling a user equipment to establish a connection in a radio communications network The user equipment is served in a first cell controlled by the radio base station. The radio base station is comprised in the radio communications network. The radio base station detects a failure of a radio link between the user equipment and the radio base station. The radio base station then forwards a user equipment context of the user equipment to a circuitry controlling a second cell when the failure is detected. The user equipment context enables the circuitry controlling the second cell to serve the user equipment and thereby enables the user equipment to establish the connection in the radio communications network.

Handling radio link failure in a radio communications network

The present invention relates to methods and arrangements in an MPLS-TP network, comprising a plurality of interconnected routers configured for MPLS-TP, wherein at least a first router is defined as an originating Maintenance End Point, MEP, a second router is defined as a targeting MEP and the third router is defined as a Maintenance Intermediate Point, MIP. The basic idea of the present invention is to associate a table with each MIP and MEP, wherein the tables comprises information related to the MEPs of the MPLS-TP network and the information from the tables is inserted in the reply packets and forwarded packets. By using this information, the OAM packets can find the subsequent MIP or MEP and failure localization may be performed.

Failure localisation in a MPLS-TP network

Embodiments herein relate to a method in a user equipment for handling a radio link failure in a radio communications network. The user equipment is served in a first cell controlled by a radio base station. The radio base station is comprised in the radio communications network, The user equipment detects a first indication of a failure of a radio link between the user equipment and the radio base station. The user equipment then transmits a second indication of radio link failure to the radio base station when the first indication is detected.

A method of localizing a fault in a network is disclosed. The network comprises nodes (SW. . . SW) links, and edge-nodes (EN. . . EN) arranged as a plurality of spanning trees (T, T,T), the spanning trees being partially disjoint. The network further comprises means for network management. The method comprising the steps of receiving information on the configuration of the plurality of tree topologies in the network; monitoring connectivity in the network; upon detection of a loss of connectivity in the network, identifying the failed tree(s), and determining the network elements common to the failed tree(s).

Fault localisation in multiple spanning tree based architectures

The present invention relates to an arrangement comprising an Ethernet carrier network, managed by a management system () and comprising a number of levels of management domains, each comprising a number of edge nodes () and a number of intermediate nodes (). Each edge node () comprises fault detection of connectivity check messages and fault locating means with holding means () adapted to hold path information for the paths to all other edge nodes. A fault detection means of an edge node having detected a fault is adapted to activate edge node fault locating means to locate the fault using the patch information in the edge node holding means to find a first target intermediate node substantially in the middle of the path containing the fault, and to, directly, send a first loop back message to said intermediate node. A response from said intermediate node indicates that the fault is located at the distant portion of the path, no response indicates that the fault is located at the proximate portion of the path. Further loop back messages are sent to consecutively identified intermediate nodes of the respective path portion identified to contain the fault by the respective preceding loop back message until the fault is localized.

Arrangement and a method for handling failures in a network

An admission control process in an Ethernet-based access network having both active links and idle backup links. When a service request is received in an access node, the process searches for a path of links to an access edge node with sufficient bandwidth to serve the service request. Active links are searched first. If a path of active links with sufficient bandwidth cannot be found, and the service is a unicast request, the process searches for a path that utilizes at least one idle backup link and has sufficient bandwidth to serve the service request.

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Solna, Sweden

Wei Zhao