Telefonaktiebolaget Lm Ericsson (publ)

Optis Wireless Technology, LLC

Optis Cellular Technology, LLC

Unwired Planet, LLC

Other

Idtp Holdings, Inc.

Michael Meyer

Henning Wiemann

Johan Torsner

Janne Peisa

Magnus Stattin

Reiner Ludwig

Joachim Sachs

Mats Fredrik Sågfors

Mats Fredrik Sagfors

Stefan Wager

Stefan Parkvall

Magnus Lindström

Ghyslain Pelletier

Anders Furuskär

Johan Rune

Erik A Eriksson

Kumar Balachandran

Laetitia Falconetti

Henrik Enbuske

Anna Larmo

Bela Rathonyi

Roger Kalden

Niclas Wiberg

Eva Englund

Christian Hoymann

Per Johan Beming

Mathias Johansson

Toomas Wigell

Christiaan Roobol

Per Johan Torsner

Sabine Sories

Mats Fredrik Sägfors

Robert Baldemair

Jung-Fu Cheng

Leif Wilhelmsson

Pål Frenger

Min Wang

Oumer Teyeb

Konstantinos Dimou

David Astely

Thorsten Lohmar

Torsten Dudda

Niklas Johansson

Kazuhiko Inoue

Stefan Wänstedt

Peter Larsson

Anders Wallén

Jacob Österling

Frank Hundscheidt

Per Hans Willars

Christian Skärby

András Rácz

Elena Myhre

Jörg Huschke

Kristina Jersenius

Hannes Ekström

Uwe Horn

Joakim Bergström

Magnus Lindstrom

Hannes Ekstrom

Andreas Schieder

Stephan Baucke

Stefan Henrik Andreas Wager

Raphael Quinet

Reijo Matinmikko

Norbert Niebert

Shyam Chakraborty

Tobias Ley

Rikard Thomasson

Edwin Van Der Pol

Erik Sch&ouml;n

Tormond Hegdahl

Waqas Akbar

Ashild Groenstadt

Mats Ságfors

The invention discloses a method () for a cellular system (), in which traffic can be exchanged between first () and second () transceivers. The traffic is sent in data units, each of which is given an identifier, and which data units may be divided into segments. A receiving transceiver () may send status information in data frames or data units () about properly received, partially received, or non-received data units to a sending transceiver, i.e. the transceiver from which the data was sent. In the case () of partially or non-received data units, the status information includes () information about whether the data unit or units were non-received or partially received, and in the case of one or more partially received data units, which () parts of those data units that were not received.

Method and a device for improved status reports

The present invention relates to methods and apparatuses (radio base station) and UE for enabling a UE to perform a random access. According to embodiments of the present invention, an identification number of a dedicated random access preamble is, in a message, transmitted together with information indicating in which channel or channels the preamble is valid for the UE. The UE can then use the received information and based on that information perform a random access.

Methods and apparatuses for performing preamble assignment for random access in a telecommunications system

A method and apparatus according to the present invention addresses and/or prevents lost protocol synchronization in HARQ systems caused by ACK/NACK errors. One embodiment detects lost synchronization errors for NDI-based retransmission protocols and restores synchronization by sending an explicit RESET message. In response to the RESET message, the transmitter aborts the transmission of a current PDU and transmits a new PDU and corresponding NDI. Another embodiment prevents protocol synchronization errors by sending scheduling grants on a packet by packet basis. The receiver sends a subsequent explicit scheduling grant to the transmitter based on an error evaluation of a received PDU. The transmitter will not send the next PDU unless it receives the subsequent explicit scheduling grant.

Protocol synchronization for HARQ

Coverage of a power-limited mobile terminal is enhanced by sending information relating to a single Hybrid Automatic Repeat Request (HARQ) process from the mobile terminal to a base station using several transmission time intervals.

Method and arrangement for retransmission using HARQ

A mobile station is configured to support handover from a source base station to a target base station. The mobile station receives signaling from the target base station that indicates Packet Data Convergence Protocol (PDCP) protocol data units which have been successfully received at the target base station. In response, the mobile station generates further PDCP protocol data units for missing PDCP service data units from corresponding PDCP service data units buffered at the mobile station. The generating comprises using a different header compression state from that which was used for the missing PDCP service data units and ciphering specific to a connection with the target base station. The mobile station transmits the further PDCP protocol data units to the target base station.

Method and apparatus for seamless handover in a wireless communication network

In a mobile network, the transmission of downlink data blocks to one or more terminal devices is accomplished on the basis of a retransmission protocol with a first feedback time defining a time interval between transmission of a first data block and transmission of a first feedback message being different from a second feedback time defining a time interval between transmission of a second data block and transmission of a second feedback message. The first feedback message indicates whether the first data block was successfully received, and the second feedback message indicates whether the second data block was successfully received. A base station of the mobile network controls the terminal device to send the second feedback message on other resources than used for transmission of the first feedback message.

Retransmission protocol feedback handling with multiple feedback times

A method for use in a cellular communications system in which system traffic can be exchanged between transceivers comprises receiving traffic from a second transceiver at a first transceiver. The traffic includes data units that are each associated with an identifier. The data units are also divided into segments. The method additionally includes sending status information from the first transceiver to the second transceiver. The status information pertains to one or more data units transmitted by the second transceiver. Additionally, sending the status information includes, for non-received and partially received data units, sending information indicating the data units were non-received or partially received and, for partially received data units, sending information indicating which parts of the data units were not received.

A method is provided in a receiving node for handling status information of data units transmitted from a sending node to the receiving node over a radio link. The receiving node establishes that a number of data units that has been transmitted by the sending node are missing. The receiving node sends a reduced status message to the sending node over the radio link, which message is reduced such that it comprises the negative acknowledgement for a first part of missing data units and omits negative acknowledgements for the rest of the missing data units. The omitted negative acknowledgement for the rest of the missing data units will not erroneously be interpreted as correctly received data units by the sending node.

Method and arrangements in a telecommunication system for handling status information of data units

A method of adapting the output power of a radio transmitting entity within a cage having at least one aperture. The method includes the steps of providing at least one sensor operable to sense the condition of the at least one aperture and providing a controller to adjust the output power of the radio transmitting entity in accordance with the sensed condition of the at least one aperture.

Adapting output power of a radio transmitting entity

The present invention relates to a method in a cellular communication system, for avoiding errors in a HARQ process, wherein an NDI flag is used both for indicating either semi-persistent scheduling, SPS activation or SPS retransmissions, and also for indicating, by toggling of the flag, a new transmission in dynamic scheduling mode. The method comprises the steps of receiving, in a scheduling message, an indication that dynamically scheduled transmission will take place; if a semi persistent resource has occurred for the same HARQ process since a previously received indication for dynamically scheduled transmission, then considering the NDI flag to be toggled regardless of the value of the NDI flag. Thus, if the condition is fulfilled, a UE will always regard the NDI flag as indicating or requesting a new data transmission.

Method and arrangement in a telecommunication system

Protocol synchronization for HARQ background

Growing community of inventors

Aachen, Germany

Michael Meyer