Telefonaktiebolaget Lm Ericsson (publ)

Other

Lenovo (beijing) Limited

Lenovo Group Limited

Tarmo Kuningas

Sharokh Amirijoo

Stephen J Grant

Muhammad Ali Kazmi

Daniel Chen Larsson

Dirk Gerstenberger

Mats Fredrik Sågfors

Elena Myhre

Paul Mihkel Teder

Elena Voltolina

Roger Wallerius

Lars Blomstergren

Daniel Larsson

There is provided support mechanisms for at least one adding and removing a cell from operation in a heterogeneous radio network having a first type of basic cell for providing basic radio coverage and a second type of cell associated to a basic cell as a capacity enhancing cell. A capacity enhancing cell is selectively switched on and off. When the capacity enhancing cell is shut down the cell does not exist over the air while cell configuration information is kept. When the capacity enhancing cell is switched on the cell becomes available again over the air interface. An indication of shut-down and a wake-up call message for switch-on of the capacity enhancing cell are communicated between a base station serving the capacity enhancing cell and a base station serving the basic cell. In this way energy savings can be supported without disrupting service availability.

Energy-saving mechanisms in a heterogeneous radio communication network

Systems and methods that provide improved success rates for connection reestablishments in a cellular communications system are disclosed. Embodiments of a radio access node in a cellular communications system enabling connection reestablishment for a wireless device to a target cell controlled by the radio access node are disclosed. In some embodiments, the radio access node is operative to: (a) perform a wireless device context fetch for a context for the wireless device from two or more candidate source cells of the wireless device in response to a connection reestablishment request from the wireless device and (b) receive a wireless device context from at least one of the two or more candidate source cells of the wireless device in response to performing the wireless device context fetch. By performing multiple context fetches, the radio access node mitigates the problem of physical cell identifier ambiguity.

Systems and methods providing improved success rate for RRC connection reestablishments

In a System Architecture Evolution/Long Term Evolution (SAE/LTE) radio network, the network is set to configure the link MTU in the UE for each bearer where the network-configured link MTU can represent an MTU of a path for a SAE bearer service in complete or part of a particular SAE/LTE network.

Method for configuring the link maximum transmission unit (MTU) in a user equipment (UE)

Additional information is included in or used to generate a positioning reference signal to enable detection of a cell identifier 'collision' between two different cells associated with two or more base stations. In one example embodiment, a user equipment terminal detects the collision using the additional information included in or used to generate positioning reference signals sent by two or more base stations and reports the collision to the network, and the network resolves the collision by assigning a different cell identifier to one of the colliding cells.

Detection of collisions of radio coverage cell identifiers

The present invention relates to resource management in a telecommunication system. In particular the invention relates to detection and estimation of transport network load and optimization of transport network resources. According to the method and arrangement of the invention a serving node engaged in admission control identifies a transport network interface from which transport load measurements are required for the admission control, and a target radio network node related to the identified transport network interface. The serving radio network node configure the target radio network node to perform and report measurements on the transport network interface.

Method and arrangement in a telecommunication system

A method of controlling the volume of user-plane traffic on the Iub or Iub/Iur interface between a Radio Network Controller and a Node B of a UMTS Radio Access Network during periods of overload. The method comprises, for individual uplink or downlink connections established over the Iub or Iub/Iur interface, monitoring at the Radio Network Controller the late arrival of frames at the Radio Network Controller or at the Node B transmitted over the Iub or Iub/Iur interface, and based on the results of said monitoring, causing a reduction in the Iub or Iub/Iur load for a connection when appropriate.

Congestion control within a radio access network

The present invention relates to a method and arrangement for cell type information sharing between neighbor base stations in a telecommunications system. One embodiment comprises informing a second radio base station serving a second cell and having a neighbor relation with a first cell served by a first base station, of at least the cell type of the first cell. This is accomplished by adding the cell type information to a set of information to be signaled to the second base station, and then signalling the set of information to the second base station.

Cell type information sharing between neighbor base stations

The invention comprises a method for migrating control plane data transport between a control node () and a base station () controlled by the control node from an old and currently used transport technology, e.g. an ATM based transport option, to a new transport technology, e.g. an IP based transport option. A protocol stack for the new transport technology is created () in the control node (). In a similar manner, a protocol stack for the new transport technology is created () in the base station (). Thereafter, a connection based on the new transport technology is formed () between the control node and the base station. Then the new transport technology is used () on the formed connection for at least one new control plane message between the control node to the base station. The invention comprises also a device for controlling a migration of control plane data transport between a control node and a base station in accordance with the above-described method and a control node comprising such a device.

Method and apparatus to migrate transport protocols

A radio access network () facilitates transmission of a Multimedia Broadcast/Multicast Service to plural user equipment units served by a radio base station. A radio network controller node () includes in a first message () of a Common Transport Channel Setup procedure an indication that sharing of a common transport bearer () involved in a session of the Multimedia Broadcast/Multicast Service is allowed. A radio base station () makes a determination whether to share the common transport bearer () among user equipment units () situated in plural cells (C) served by the radio base station (). If the determination is positive, the radio base station () includes in a second message () of the Common Transport Channel Setup procedure an identification of an already-established channel to be used as the shared common transport bearer. The radio network controller () then uses the already-established channel as the shared common transport bearer for transmitting Multimedia Broadcast/Multicast Service user data to user equipment units () situated in plural cells served by the radio base station.

Method and apparatus for sharing transport channel for node serving plural cells with multimedia broadcast/multicast

A radio access network facilitates transmission of a Multimedia Broadcast/Multicast Service (MBMS) to user equipments in plural cells served by a radio base station. A radio network controller includes in a first message of a transport channel setup request either an indication that transport sharing is allowed or an identification of a common transport bearer. The radio base station configures a new transport channel mapped to the common transport bearer such that it is stable with respect to other common transport channels. During operation, the radio network controller provides the MBMS data over the common transport bearer and the radio base station retransmits the MBMS data over the common transport channels to the plural cells. If the MBMS data over the common transport bearer arrives outside of time-of-arrival windows of any common transport bearer, then the radio network controller adjusts the transmission accordingly.

Facilitating efficient multimedia broadcase/multicast service in a telecommunication system

The present invention relates to a method and arrangement for cell type information sharing between neighbor base stations () in a telecommunications system (). One embodiment comprises informing a second radio base station () serving a second cell () and having a neighbor relation with a first cell served by a first base station (), of at least the cell type of the first cell. This is accomplished by adding () the cell type information to a set of information to be signaled to the second base station, and then signalling () the set of information to the second base station.

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Sollentuna, Sweden

Tarmo Kuningas