Telefonaktiebolaget Lm Ericsson (publ)

H&aring;kan Gunnar Olofsson

Knut Magnus Almgren

Magnus K Almgren

Peter Schramm

Sverker Magnusson

David Anthony Smith

Christer Johansson

Farooq Khan

Magnus C Frodigh

Erik Ekudden

Dalibor Turina

Yngve Kenneth Wallstedt

Frank Muller

Johan Sk&ouml;ld

Zsolt Haraszti

Niclas Lindberg

Magnus Lorentz Hartman

Frank M&uuml;ller

Yngve Bengt Persson

Katarina Isaksson

Stephan Trzeciak

Henrik Andreasson

B&eacute;la Stefan Kazmir Rathonyi

Karin Agneta Bengtsson

A method and an apparatus for providing radio access bearer services for different applications in a network having a core network and a radio access network through radio access bearers between the networks are presented. One or more session traffic flows being sent by an application are identified, the identified session is characterized in the form of parameters needed for the determination of the one or more radio access bearers. The characterized parameters are converted into radio access bearer attributes. One or more radio access bearers defined by the attributes are requested and established. Each session is mapped onto a correct radio access bearer established upon receiving the request. The one or more radio access bearers are released when no longer needed.

Method and apparatus for providing radio access bearer services

A bit rate indicator for use in the mobile station of a radiotelephone system which provides an indication to the user of the maximal bit rate available in the current cell and the predicted bit rate the user can expect to achieve if a session were initiated in his present location. In calculating the maximal bit rate, the mobile station receives a message from the base station indicating the base station's capabilities, such as support for multi-slot operations and coding/modulation schemes. The mobile station then uses the base station's capabilities along with its own capabilities to determine the maximal bit rate. In calculating predicted bit rate, the mobile station measures the link quality of at least one channel and based on, at least one of, the measured link quality and mobile's capabilities, determines a predicted bit rate the user would achieve in his present location. Both the maximal and predicted bit rates can be outputted on the mobile station for comparison by the user. This information can be used to effectively direct the user to the location in a cell with the best link quality. The present invention may be especially useful when using a mobile station to interface with the Internet.

Terminal bitrate indicator

A control system for handling a range of data transfer rates within a telecommunication network is disclosed. The system comprises an application interpreter for generating at least one bearer request; an admission control apparatus for matching said at least one bearer request with at least one offered bearer to produce a negotiated bearer; and a radio resource manager for receiving the negotiated bearer and maintaining a level of quality specified in said bearer request.

Admission control of multiple adaptive and elastic applications

The present invention relates generally to the problem of cell selection, for e.g. cell handover, in mobile telecommunication systems, and more particularly to the problem of selecting the optimum cell among cells with differing capabilities due to different air interface modes. Known algorithms for cell selection and handover are extended by applying additional criteria that take into account the capabilities, due to different modulation and coding schemes, of the mobile station and the base stations that are possible candidates. The quality of service (&ldquo;QoS&rdquo;) is predicted for the different cell candidates based on a combination of signal strength or C/I, different cell capabilities, multislot capability, etc. Then the cell is selected for which the predicted QoS is maximum. In another embodiment the invention is extended by taking into account further criteria which are suitable from a system point of view, e.g. to avoid a significant increase of average outage probability or interference level. The present invention increases the use of base stations supporting high data rates. The result is an increase in overall system throughput.

Cell selection in mobile radio systems

A method and apparatus are provided for minimizing overhead in packet re-transmission in a communication system. Each packet is given a sequence number, based on a current transmission rate, the size of the packet, and a previously assigned sequence number. The packet size can be adapted so that the entire packet fits into a single transmission block. The packet size may also be adapted based on throughput. The packet size may be adapted based on the transmission rate and/or throughput, whether the packet is being transmitted the first time or if it is being re-transmitted. Alternately, if the packet is being re-transmitted, the packet is transmitted at its original transmission rate, regardless of the current transmission rate.

Method and apparatus for minimizing overhead in a communication system

Method and systems for reporting and analyzing link quality for radiocommunications are described. Use of frame erasure information (e.g., frame erasure rate (FER)) is highlighted. Presentation of frame erasure information can be segregated on a per-connection or per-cell basis, in addition to system-wide output. Moreover, frame erasure information can be correlated with geographical location of a mobile, the mobile's handover status or the equipment type of the mobile station to provide the network operator with a better understanding of quality issues within the network.

Link quality reporting using frame erasure rates

The invention relates to a method and apparatus for channel hopping between mobile stations (MS1-MS3) and a base station (BS1) in a radio communications system. A channel allocation means (211) within the base station (BS1) generates channel hopping sequences that are transmitted via a control channel (SACCH) to hopping sequence lists (204-206) in the mobile stations (MS1-MS3). The hopping sequences are also transmitted to corresponding hopping sequence lists (201-203) in the base station (BS1). A channel hopping sequence is divided into a number of sequence intervals (T,) corresponding to the time between two adjacent channel hops within a channel hopping sequence. In the channel allocation means (211) the attenuation (&dgr;) of the connections (F1-F3) and the interference (I(channel,t)) of the channels are continuously being observed within each sequence interval (T,). The channel allocation means (211) generates channel hopping sequences according to the principle that a connection that has poor connection quality will be allocated a channel hopping sequence with channels of high channel quality and connections with successively better connection quality are allocated channel hopping sequence having successively poorer channels.

Channel hopping in a radio communications system

The present invention relates generally to the problem of determining the identity of a cell for e.g. cell handoff or automatic frequency planning, and more particularly to the problem of determining the true identity of a cell when only the transmission frequency and a non-unique identity code is known. A candidate list is created for each cell. This candidate list is created based on a function of various elements e.g. distance, transmission power, cell type, and antenna placement. The cells are then ranked on the candidate list based on this function. When a particular frequency/code combination is detected, the candidate list is then consulted, and the highest ranking cell with the same frequency/code combination is chosen as being the signal source. In an alternative embodiment the neighbor cell list is used to create the candidate list. If there are no matches on this list for the detected frequency/code combination, then the neighbors of the cells on the candidate list are also added to the candidate list which is then checked for a match.

Cell identification based on distance

The invention relates to a method of performing handover in a mobile radio system. The mobile radio system performs quality measurements on signals transmitted (,) between a mobile terminal and predetermined radio base stations. Handover is performed (,) when some of the measured signal strengths exceeds the signal strength for the radio base station to which the mobile terminal for the moment is set up, added to a handover value. The handover value is dependent on measured signal strengths and neighboring cell relation values. The neighboring cell relation values depend on a probability for handover to be performed from one radio base station to another radio base station in the mobile radio system.

Method and system in a mobile radio system

A transmitter diversity assembly and an associated method for a radio transmitter. When coupled to a radio transmitter to form a portion thereof, signal diversity is created to overcome multi-path fading. A plurality of antennas are freely selectable to be coupled to receive bursts of a communication signal, modulated to be transmitted on any of selected carriers. By altering the carriers upon which the bursts of the communication signal are transmitted and the spatially-separated antennas used to transduce the bursts of the communication signal, both transmission space diversity and frequency diversity is created. Polarization diversity is further provided by utilization of dual-polarized antennas.

Method and apparatus for transmitting communication signals using frequency and polarization diversity

A transmitter diversity assembly and an associated method for a radio transmitter. When coupled to a radio transmitter to form a portion thereof, signal diversity is created to overcome multi-path fading. A plurality of antennas are freely selectable to be coupled to receive bursts of a communication signal, modulated to be transmitted on any of selected carriers. By altering the carriers upon which the bursts of the communication signal are transmitted and the spatially-separated antennas used to transduce the bursts of the communication signal, both transmission space diversity and frequency diversity is created.

Method and apparatus for transmitting communication signals using transmission space diversity and frequency diversity

The source cell of a radio signal broadcast within a cellular radio network is determined by several alternative techniques. Each involves either a mobile station or a base station broadcasting a system-unique identity signal from which the network can determine the source of the signal. From the unique source of the signal the network can determine the geographic source from which the signal originated and use that information to perform automatic system administration functions, such as, prepare a best neighbor list or perform frequency planning and allocation for the network.

Radio signal source identification system

A communication system supports multiple modulation/coding schemes. When connection quality drops below an acceptable threshold, ARQ techniques use an alternative modulation/coding scheme which is more resistant to noise and/or interference. Flexible resegmentation and mapping of information blocks is supported.

Growing community of inventors

Stockholm, Sweden

Håkan Gunnar Olofsson

Growing community of inventors

Stockholm, Sweden

H&aring;kan Gunnar Olofsson

Håkan Gunnar Olofsson