Lg Electronics Inc.

Pantech Co., Ltd.

Pantech Corporation

Goldpeak Innovations Inc

Wavecom

Sierra Wireless, Inc.

Dragan Vujcic

Yeong Hyeon Kwon

Seung Hee Han

Min Seok Noh

Jin Sam Kwak

Dong Cheol Kim

Hyun Woo Lee

Patrick Fischer

Sung Ho Moon

Remi Feuillette

Dong Kyu Kim

Hyun Hwa Park

Nicolas Ibrahim

Jae Hoon Chung

Yeong-Hyeon Kwon

Min Seo Hon

Dong Cheul Kim

A base station transmits a random access response in response to a random access request (random access preamble) of a user equipment. The random access response includes information about a time when the random access request is transmitted and sequence number information of the random access request (random access preamble). The user equipment checks whether the received random access response is the response of the random access request transmitted by the user equipment, using the information about the time when the random access request is transmitted and the sequence number information included in the received random access response.

Method for transmitting and receiving random access request and transmitting and receiving random access response

A method for transmitting a random access preamble to a base station includes generating the random access preamble from a Zadoff-Chu (ZC) sequence, wherein the random access preamble is defined by cyclic shift (C) of the ZC sequence; and transmitting the random access preamble to the base station.

Method for setting cyclic shift considering frequency offset

A method for establishing a cyclic shift sequence to provide against the frequency offset is disclosed. The method calculates a distance between a channel response position of the sequence and an alias channel response position caused by a frequency offset, calculates the number of cyclic shifts per group according to the calculated distance, and establishes the cyclic shift (CS)-applying interval. This method easily establishes a cyclic shift (CS) interval at a specific location having no overlapping by considering a channel response of a reception (Rx) sequence and an alias location of this reception (Rx) sequence, although a reception (Rx) signal is shifted by a channel delay spreading or a propagation delay irrespective of categories of a domain generating a sequence, so that it can greatly reduce the number of the detection errors and the false alarm rate. And, if a sequence of the cyclic shift (CS) is allocated to a cell having a frequency offset of more than a predetermined level, the present invention can minimize the influence of a frequency offset on a high-mobility cell.

A terminal random access procedure is improved by allowing a mobile terminal to correctly map signature indexes onto cyclic shifted Zadoff-Chu (ZC) sequences when the deployed cells support a high-speed mobility by informing a mobile terminal whether a cell supports high-speed mobility.

Methods and procedures for high speed UE access

A method for generating an uplink transmission burst includes using one or more symbols to define the uplink transmission burst, and forming a preamble portion and a payload portion for the uplink transmission burst. The preamble portion is formed using at least a portion of one or more of the symbols, such that the preamble portion includes a signature that is defined in a predetermined signature set. The payload portion is formed using at least a portion of one or more of the symbols. Typically, at least a portion of the preamble portion and at least a portion of the payload portion are formed using the same symbol.

Method for payload part transmission on contention channels

According to one embodiment, a method of requesting a random access connection between a mobile terminal and a base station includes: receiving, by the mobile terminal, information comprising at least one signature root sequence index, a cyclic shift parameter, and a number of signatures used for representing a boundary between a first signature set and a second signature set; preparing, by the mobile terminal, random access signatures according to the at least one signature root sequence index and the cyclic shift parameter, wherein at least one of the random access signatures is associated with the first signature set and the remaining of the random access signatures are associated with the second signature set; and selecting, by the mobile terminal, a random access preamble from the first signature set or the second signature set based on a message size and a radio condition.

Signaling for preamble used for random access

A base station transmits a random access response in response to a random access request (random access preamble) of a user equipment. The random access response includes information about a time when the random access request is transmitted and sequence number information of the random access request (random access preamble). The user equipment checks whether the received random access response is the response of the random access request transmitted by the user equipment, using the information about the time when the random access request transmitted and the sequence number information included in the received random access response.

The disclosure relates to a method for a user equipment to report a transmission power capability to an e Node B. The user equipment operates in carrier aggregation. The method comprises determining, by the user equipment, that the transmission power capability of at least one power amplifier of the user equipment reaches at least one defined threshold, and triggering a generation of a power headroom report based on the determining step. The disclosure also relates to the corresponding user equipment and e Node B.

Power limited case signaling

Method for managing activation or deactivation of a secondary serving cell, SCell, for a base station () of a radiocommunication network and a User Equipment (), UE, initially using a primary serving cell, PCell, and supporting Carrier Aggregation so as to aggregate SCell to PCell, the method comprising: &#x2014;the UE obtaining information suggesting that an activation/deactivation command to activate/deactivate an SCell is likely to be received by the UE from the base station, said information obtaining taking place before said activation/deactivation command is actually received; &#x2014;activating/deactivating an SCell as early as possible after said activation/deactivation command is received by the UE from the base station.

Carrier aggregation management and related device and system

Methods for allocating and choosing dedicated signatures for random access are provided. Options for allocating dedicated signatures include allocating the dedicated signature from the unused space of the random signature root index when there is unused space and allocating more dedicated signatures from the same root index using the same time/frequency resources if additional signatures are needed, and reserving some preambles from the contention-based random access preambles from both sets of preambles. The present invention also proposes that the dedicated signatures be reserved in each of two sets of preambles.

Growing community of inventors

Limours, France

Dragan Vujcic