Telefonaktiebolaget Lm Ericsson (publ)

Avago Technologies General IP (singapore) Pte. Ltd.

Wenwen Liu

Haiming Wang

Yuan Wang

Tao Chen

Tao Peng

Wenling Bai

Ziyang Liu

Ruiping Wei

Dongsheng Sang

Songling Wang

Zixi Fu

A method and an apparatus for obtaining timing advance value. The method comprises: receiving (S) a time domain signal, which contains at least part of a reference signal; extracting (SI), from the time domain signal, a first group of signal parts including at least one signal part, and a second group of signal parts including at least one signal part, wherein the first group of signal parts do not overlap the second group of signal parts; and determining (S) a timing advance, TA, value based on an energy of a signal part in the first group of signal parts and an energy of a signal part in the second group of signal parts, wherein the energy of the signal part is based on correlation between the signal part and the reference signal. Therefore, the TA value may be obtained based on a time domain signal.

Method and apparatus for obtaining timing advance value

The present invention discloses a method, an apparatus and a computer program for resource contention in device-to-device communication links. The method partitions the time-frequency radio resource grid with a resource block set forming the resource unit in the grid, for all available, used and unusable frequency bands around a given virtual central frequency. Each resource block set is partitioned into a common control channel and a data channel. With a given procedure of control data transmission between transmitting and receiving user terminals, the resources are competed and shared. Frequency shifting with short distance frequency change or frequency transference with a larger frequency hopping into a free radio resource is available. The competition procedure is done in order to fairly share the frequency bands as a function of time between different device-to-device communication links in a localized manner.

Ratio resource sharing and contention scheme for device-to-device communication in white space spectrum bands

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Beijing, China

Wenwen Liu