Alcatel Lucent

Alcatel N.v.

Alcatel

Bozo Cesar

Oliver Stanze

Bodo Pfeiffer

Karl Schrodi

Hardy Halbauer

Mark Doll

Gert Eilenberger

Robert Fetscher

Stephen Kaminski

Christian Gerlach

Volker Braun

Stefan Wahl

Andreas Weber

Bernd Gloss

Uwe Doetsch

Osman Aydin

Klaus Keil

Stephan Saur

Yejian Chen

Torsten Fahldieck

Joachim Riemer

Jürgen Otterbach

Klaus-Dieter Menk

Thomas Banniza

Christian Georg Gerlach

Torsten Fahldleck

A method for interference reduction in a radio communication system is disclosed. The method includes receiving from a mobile station indications of radiation beams that are transmitted by a first base station of the radio communication system and that fulfill or exceed a predefined quality criterion at the mobile station, when the mobile station is attached to the first base station and when the mobile station is located within a first overlapping coverage area of the first base station and of a second base station of the radio communication system, and determining at least one radio resource to be unused or to be transmitted with a limited transmission power by the first base station for at least one of the radiation beams based on the received indications for serving the mobile station or a further mobile station by the second base station with the at least one radio resource.

Method for interference reduction in a radio communication system, processing unit, and wireless access network node thereof

A sounding method in a cellular wireless communication system, comprising at least one mobile station and at least two base stations. One base station is a serving base station for the mobile station and the at least one further base station is a neighboring base station. The serving base station generates a schedule for measurement signals and transmits said schedule to the mobile station and to the neighboring base station. The mobile station transmits measurement signals in accordance with the schedule to the serving base station and to the neighboring base station. Furthermore, the neighboring base station calculates a mean channel state for the uplink channel from the mobile station to itself and transmits the mean channel state to at least one further base station, so that said base station can be provided with channel estimations for uplink channels between the mobile station and all base stations.

Measurement in radio communication systems

The invention concerns a method for beam coordination between a first base station (M) and a second base station (P), wherein interfering beams (B-B) transmitted from the first base station (M) are determined based on measured reference signals, dependent on a ranking of interfering beams (B-B) which shall be restricted in use, a restriction of a use of radio resources in the first base station (M) in at least one ranked interfering beam (B) is performed, and user terminals (UE, UE) served by the second base station (P) are scheduled on radio resources which are restricted in use in the first base station (M) in said at least one ranked interfering beam (B), a base station and a user terminal therefor.

Method for beam coordination, and a base station and a user terminal therefor

The invention concerns a method for downlink communication between a base station and a user terminal by means of a downlink superimposed radio signal comprising downlink data for the user terminal and for at least one further user terminal that are transmitted using the same radio resources, wherein the downlink data for the user terminal are transmitted with lower power than the downlink data for the at least one further user terminal, and control information is sent in downlink from the base station to the user terminal that enables the user terminal to decode the downlink data for the at least one further user terminal, a base station, a user terminal and a communication network therefor.

Method for downlink communication by means of a downlink superimposed radio signal, a base station and a user terminal therefor

The present invention relates to a method for reducing interference in the downlink direction of a cellular radio communication system comprising base stations communicating with terminals using a frame structure showing a time and frequency extension, said frame comprising a preamble portion and at least one data portion, said terminals being adapted to receive frames for which the receive power of said at least one data portion is varying in a predefined range relative to the receive preamble power of said preamble portion, According to the present invention, the method comprises the steps of:

Method for reducing interference in the downlink direction of a cellular radio communication network and corresponding base station

The present invention relates to a method for scheduling transmissions in a radio communication system comprising a plurality of base stations and a plurality of terminals, a base station being associated to a sector and transmitting/receiving data to/from terminals located in said sector. According to the present invention, the method comprises the steps of: &#x2014;determining an area around each given sector, said area comprising a set of sectors, &#x2014;allocating to said sectors in said area a scheduling priority chosen among at least two different scheduling priorities, &#x2014;scheduling decisions in a sector having a lower scheduling priority than a sector belonging to said area depending on scheduling decisions made for said sector with higher scheduling priority, said scheduling decisions made in said sector with higher scheduling priority being reported by said base station associated to said sector with higher scheduling priority to said base station associated to said sector with lower scheduling priority.

Method for scheduling terminals in a radio communication network, and corresponding base station

The invention relates to a mobile telecommunication device () for establishing a telecommunication connection in the radio frequency range with a base station (), the mobile telecommunication device comprising; at least a first () and a second antenna (), an electromagnetic shield () located between the first and the second antenna, a logic component (), wherein the first and the second antenna are adapted to transmit and receive telecommunication signals of the same frequency band, and wherein the logic component selects whether the first or the second antenna is used for the telecommunication connection with the base station.

Antenna apparatus and antenna selection method

Method of distributing data packets of system software where the receiving units acknowledge only proper reception

A service-on-demand system (SYS) includes a facility (EIN) which is designed to assign transmission channels to terminals (END , END ). To accomplish this, the facility (EIN) contains two interfaces (S , S ) for connecting it to two groups of terminals (END , END ), a memory (MEMO) which holds an assignment table containing entries on currently available and currently busy transmission channels for transmitting services requested from terminals (END , END ), with a variable assignment of transmission channels to terminals (END , END ) being possible regardless of which group the terminals (END , END ) belong to, and a control unit (CTRL) which coordinates the assignment. Only those transmission channels can be assigned which are considered currently available in the memory (MEMO). The transmission channels are not permanently assigned to groups but are largely freely available to all terminals (END , END ). For example, a minimum number of freely available transmission channels may be reserved for each group, and the remaining channels may be used both by terminals of group and by terminals of group , etc., depending on traffic volume and demand. This provides flexibility and adapts the assignment of transmission channels automatically to the traffic volume.

Facility for assigning transmission channels to terminals of a service-on-demand system

A buffer or other communications resource in, e.g., an ATM switch element receives random data which is then used by different data sinks. After the data has been outputted to the data sinks, the communications resource (e.g., the memory locations of the buffer) are released, i.e., labeled as free again. However, a resource which is not marked as free as a result of an error (whether erroneously the data is not retrieved or whether the release procedure is erroneous) remains blocked. To avoid permanent blockage of those memory locations whose contents have been in the buffer so long that they definitely (or at least very likely) should have been called for, information on the time of entry is stored together with the data. All memory locations are checked at regular intervals for the age of their contents. Upon attainment of a predetermined age, the location is labeled as free.

Method of and circuit arrangement for freeing communications resources,

Prior Art/Technical Problem: During the establishment of a call through a switching network 20, the path is selected on the basis of the instantaneous loading of the switching network and maintained during the call. The problem of eliminating local blocking by rearranging existing connections has not been satisfactorily solved because of errors occurring during the rearranging process. Basic Idea: Provide in an ATM exchange operating with virtual connections the same devices which assure the correct order of the cells in the 'connectionless' mode. Solution: Each output of the switching network is followed by an output unit 30 which ensures that the cells are output in the correct order. Advantage(s): Virtual connections can be adapted to the instantaneous loading of the switching network error-free at any time. The assurance of the correct order can be implemented so as to largely compensate for delay jitter.

ATM exchange which resequencies the cells using their sequence numbers

In practice, switching is a continuously changing mixture of point-to-point connections, point-to-multipoint connections with low fanout, and point-to-multipoint connections with high fanout. The switching elements of a switch optimized for point-to-point connections are additionally enabled to copy a few input signals for an arbitrary number of outputs, so that a very large number of copies is attainable for few input signals. This switch is supplemented by a copy switch which serves exclusively to make limited numbers of copies for a large number of input signals, which are then switched in the (group) switch as point-to-point connections. Point-to-point connections are operated as connectionless connections, but outside the switch act as virtual connections. Point-to-multipoint connections are operated as virtual connections (connection-oriented) by means of connection tables.

ATM exchange with copying capability

To be able to load an ATM switching network as efficiently as possible, the successive cells of one and the same connection are routed to the output by as many different paths as possible; however, mutual overtaking of successive cells must be avoided or corrected. Each cell is held at the output until it is certain that no older cell can be buffered in the switching network. Before the cell is passed on, a check is made to determine whether the cells received from the switching network later include an older cell which must be passed on before that cell. At the input end, consecutive numbers ('Sequence Numbers') are allocated to the cells. A buffer (1) at the output end is operated, at least in part (1 . . . d), in the manner of a shift register, thereby introducing a predetermined delay. Prior to the output of a cell, at least the shift-register-like portion of the buffer is examined as to whether a cell written in later is to be put out earlier: if so, the two cells are interchanged.

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Stuttgart, Germany

Bozo Cesar