Telefonaktiebolaget Lm Ericsson (publ)

Siemens Aktiengesellschaft

Nec Corporation

Huawei Technologies Co., Limited

Nortel Networks Corporation

Jacob Kristian Osterling

Miguel Berg

Chenguang Lu

Per-Erik Eriksson

Elmar Trojer

Franz Heiser

Toshifumi Sato

Armin Splett

Ralf Bergqvist

Klas Sjerling

Werner Korte

Eric Georgeaux

Patrick Lagrange

Yang Ganghua

Lan Haiqing

Lin Zhibin

Peter Merz

Fredrik Gunnarsson

Tobias Tynderfeldt

Hizuru Nawata

Dan Anders Lindqvist

Gunnar Peters

Thomas Ostman

Tomas Andreason

Kenichiro Yagawa

Hans Kröner

Kristian Mats Lindskog

Ulf Backman

Mats Kristian Lindskog

Helene Hallberg

Bernd Hassler

Michael Englund

Torbjöm Aarflot

Peter Björk

Hans Kroner

Rolf Kramer, Legal Representative

A method for evaluating performance between a network node and at least one test radio head, each one of the at least one test radio heads being located remotely from the network node. The method is performed in the network node, and comprises sending a loopback signal to at least one test radio head to add a loopback of its transmission signal on its receiving signal; sending a transmission signal to the at least one test radio head; receiving a received signal from the at least one test radio head; and determining a performance by comparing the received signal with the transmission signal.

Evaluation performance between a network node and a radio head

A first network node of a cellular system is configured for communication with a second network node over a twisted pair wire. The first network node includes a receiver for receiving, over the twisted pair wire, an intermediate frequency signal from the second network node, which intermediate frequency signal has been converted from a high frequency signal having a frequency higher than the frequency of the intermediate frequency signal by the second network node, and a down-converter for converting the intermediate frequency signal to a low frequency signal having a frequency lower than the frequency of the intermediate frequency signal. The first network node also includes an up-converter for converting a received low frequency signal to an intermediate frequency signal having a frequency higher than the frequency of the low frequency signal.

Methods and network nodes for communication between a first network node and a second network node over a twisted pair wire

It is presented a method for assisting the determining of a position of a wireless device, the method being performed in a network node connected to a plurality of remote radio head devices via a combiner. The method comprises the steps of: receiving an uplink signal via the combiner; comparing a carrier frequency of the uplink signal with a set of manipulation schemes for a carrier frequency of uplink signals, wherein the manipulation schemes are different for at least some of the plurality of remote radio head devices; and providing a proximity indication that the position of the wireless device is in the vicinity of a remote radio head device the frequency manipulation scheme of which best matches the uplink signal. A corresponding network node, computer program, and computer program product are also presented.

Determining position of a wireless device using remote radio head devices

A method for incorporating a moving cell in a hierarchy of cells in a wireless cellular communication network, wherein each cell is associated with a neighbor cell list comprising identification of one or more neighboring cells. The method includes determining a need for an update of one or more neighbor cell lists following relocation of the moving cell from a first location having a first set of neighboring cells to a second location having a second set of neighboring cells. A neighbor cell list is generated for the moving cell including identification of each cell in the second set of neighboring cells. The neighbor cell list is updated for each cell in the second set of neighboring cells to include the moving cell. Each radio access node serving one or more cells in the second set of neighboring cells are informed on the updated neighbor cell list.

Method and radio access node for incorporating a moving cell in a wireless communication network

The present invention relates to a method and arrangement for reducing interference in a cellular communication network. A radio base station of the network is configured to serve at least a first cell, where interference is reduced by selecting a link adaptation scheme for a UE in the first cell, The arrangement comprises means for receiving measurements on estimated channel quality, means for estimating channel quality for a future transmission by adjusting the received measurements on estimated channel quality based on knowledge of future UE scheduling in at least the first cell, and means for selecting the link adaptation scheme comprising a transmit power level based on the estimated channel quality for the future transmission.

Method and arrangement for reducing interference in a wireless communication network

An interface, apparatus, and method are described for communication between a radio control (REC) node and first and second radio equipment (RE) nodes in a radio base station that transceives information over radio interface using multiple antenna carriers. The REC node is separate from and coupled to the first RE node by a first transmission link, and the second RE node coupled to the first RE by a second transmission link. Both control information and user information intended for communication between the REC node and the first RE node and the REC and the second RE node are conveyed over the first transmission link. The first RE node also conveys information between the REC and second RE node. Many advantageous features are described.

Interface, apparatus, and method for communication between a radio equipment control node and one or more remote radio equipment nodes

Method and arrangement in a first carrier controller, associated with a network node. The method aims at providing distributed power management of a plurality of power amplifiers within a sector. The first carrier controller, the network node and the power amplifiers are comprised within a communication system. Also, at least one further carrier controller is comprised within the communication system. The first carrier controller is arranged for scheduling power allocation at each power amplifier of the radio frequency power estimated to be used by at least one carrier controlled by the first carrier controller. The method comprises allocating the estimated power usage to be used by the at least one carrier controlled by the first carrier controller during a predetermined time frame on one or more power amplifiers within the same sector. The allocation is based on a priority value of each carrier, dedicated to that sector or to a power amplifier within that sector.

Method and arrangement in a communication system

A method and apparatus is described herein for controlling the operating temperature of radio equipment () in a radio base station () while preventing a decrease in power of a common channel. A radio base station () according to the present invention includes a radio unit () and a control unit (). The radio unit () determines a temperature of the radio unit (), e.g., by determining a temperature of high power radio equipment () in the radio unit (). The control unit () allocates a desired power to the common channel, determines an available power for dedicated and/or shared channels based on the allocated power for the common channel and a power limit derived from the determined temperature, and allocates the available power to the dedicated and/or shared channels.

Power control in a radio base station with sustained cell radius

A method () for use in a wireless communications system () in which there is at least a first node () which controls the traffic to and from user terminals () in a cell () within the system, so that there is downlink traffic in the system. The first node () transmits downlink traffic in radio frames, each of which comprises sub-frames. The first node () performs measurements on pre-defined system indicators in at least the first cell (), and based on the results of the measurements, the first node is allowed to autonomously decide () to vary the number of available down link sub-frames used for down link traffic in the down link radio frames and also to vary () the content of the down link sub frames which are used, the decision being valid () for a time which is specified by the first node ().

Method and device for power reduction in an LTE system

A radio base station () has an internal interface () connecting a radio equipment (RE) () and a radio equipment controller (REC) (). The radio base station performs a pre-start-up procedure or method for the internal (). The pre-start-up procedure is performed preparatory to and/or in conjunction with a start-up procedure for the internal interface. As on e of its aspects, the pre-start-up procedure involves storing one or more previously proven combinations of line bit rate and protocol as stored combination(s) for use on the internal interface. Prior to synchronization of the internal interface, the stored combination(s) are retrieved and included in a temporary available set of combinations of line bit rate and protocol. Thereafter the start-up procedure for the internal interface is initiated for the purpose of determining efficacy of the temporary available set. Should synchronization of the physical layer by the start-up procedure succeed, the pre-start-up procedure uses a valid combination of line bit rate and protocol in the available set for negotiating between the radio equipment controller (REC) and the radio equipment (RE). Should the start-up procedure fail, the pre-start-up procedure removes a failed combination of line bit rate and protocol from the set.

Pre-start-up procedure for internal interface of distributed radio base station

A network reconfigurator () is provided for use in a telecommunications network () comprising a network () of radio base stations configured for providing radio access service to the telecommunications network for wireless stations (). The network reconfigurator is arranged or configured, for differing service outages attributable to differing downed radio base stations () of the network of radio base stations, to coordinately and dynamically change modifiable characteristics of plural remaining base stations for at least partially compensating for the service outages. Preferably the reconfigurator () is configured, for differing service outages, to dynamically change differing modifiable characteristics of differing plural remaining base stations for at least partially compensating for the service outages. Modifying a characteristic of the plural remaining base stations can include modification of one or more of the following: antenna tilt of at least one of the plural remaining base station; power of a downlink common control channel of at least one of the plural remaining base stations; composition of a neighbor list of at least one of the plural remaining base stations; a parameter pertaining to one of handover, cell power, and cell size for the at least one of the plural remaining base stations.

Non-homogenous telecommunications base stations

An interface, apparatus, and method are described for communication between a radio equipment control (REC) node and a radio equipment (RE) node in a radio base station that tranceives information over radio interface using multiple antenna carriers. The REC node is separate from and coupled to the RE node by a transmission link. Both control information and user information are generated for transmission over the transmission link from one of the REC node and the RE node to the other. Many advantageous interface features are described.

Interface, apparatus, and method for communication between a radio equipment control node and a remote equipment node in a radio base station

A distributed radio base station () comprises a radio equipment controller (REC) () situated at a main site () and a radio equipment (RE) () situated at a remote site (). A remote unit () configured to engage in direct communications with the radio equipment controller (REC) is also situated at the remote site (). An internal interface () connects the radio equipment controller (REC) and the radio equipment (RE). Advantageously, the internal interface () also encapsulates the direct communications between the radio equipment controller (REC) () and the remote unit, thereby obviating a separate physical link between the radio equipment controller (REC) and the remote unit. A new physical link () transmits, between the radio equipment (RE) and the remote unit, the direct communications between the radio equipment controller (REC) and the remote unit which are encapsulated over the internal interface (). The remote unit can take various differing forms, including that of an antenna () with remote electrical tilt control; a tower mounted amplifier (TMA) (); a Transmission network unit (); a separate radio base station () which is co-located at the remote site; a proprietary equipment unit (); or even one or more cascaded radio equipments (RE) ().

Encapsulation of independent transmissions over internal interface of distributed radio base station

A radio base station () has an internal interface () which connects a radio equipment () and a radio equipment controller (). At least one and preferably both of the example radio equipment () and radio equipment controller () comprises a framer () which can be controlled for transmitting samples of different protocols over the internal interface. The framer () facilitates (1) time multiplexing of N number of frames of a first protocol over the internal interface; (2) inserting L number of samples of a second protocol into M number of the frames of the first protocol, and (3) inserting a padding sample into each frame of the first protocol which does not include a sample of the second protocol. The first protocol has a frame rate; the second protocol has a sample rate which is different from the frame rate of the first protocol, and N is greater than L and M. In any of plural example modes, the padding sample can comprise either of uninterpreted information or information related to the second protocol. For example, the padding sample can comprise a parity value for the L number of samples of the second protocol. In another embodiment and method of operation, in a distributed radio base station a radio equipment controller (REC) sums different carriers and transfers a wide band signal over the internal interface.

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Jarfalla, Sweden

Jacob Kristian Osterling