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Methods and devices for communicating over a radio channel

A technology of radio channel and broadcast channel, applied in the field of communication network

Active Publication Date: 2014-01-29
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, all basic cyclic shift lengths that support larger cell sizes cannot be efficiently used because the supported cell sizes are limited by the size of the cyclic prefix and / or guard time, and the basic cyclic shift lengths longer than the cyclic prefix bits are unnecessarily excessive

Method used

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  • Methods and devices for communicating over a radio channel
  • Methods and devices for communicating over a radio channel
  • Methods and devices for communicating over a radio channel

Examples

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Embodiment Construction

[0030] Hereinafter, embodiments of the present solution will be described more fully with reference to the accompanying drawings, in which the embodiments of the present solution are shown. However, this solution can be implemented in many different forms and should not be considered limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the solution to those skilled in the art. Similar numbers indicate similar elements everywhere.

[0031] The terminology used herein is only for the purpose of describing specific embodiments, and is not intended to be a limitation of the present invention. When used herein, the singular forms "a", "an" and "the" are intended to also include the plural form, unless the context clearly dictates otherwise. It will also be understood that the terms "including", "including", "including" and / or "including" when used herein indicate ...

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PUM

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Abstract

The invention relates to methods and communication devices for transmitting data on a radio channel comprising the steps of determining (32) a first preamble format to be used in a cell of the second communication device, determining (34) a basic cyclic shift value from a set of basic cyclic shift values, the set is selected based on the preamble format, and transmitting (36) data comprising indication of the determined first preamble format and a basic cyclic shift value pointer indicating the basic cyclic shift value in the set of basic cyclic shift values.

Description

technical field [0001] The present invention relates to a method and a communication device in a communication network, in particular to a method and a communication device for transmitting / receiving data on a radio channel. Background technique [0002] In modern cellular radio systems, the radio network has strict control over the behavior of user equipment. Uplink transmission parameters like frequency, timing and power are adjusted via downlink control signaling from the base station to the user equipment UE. [0003] On power-up or after a long standby time, the UE is asynchronous in the uplink. The UE can derive uplink frequency and power estimates from downlink (control) signals. However, timing estimation is difficult to make because the round-trip propagation delay between the base station and UE is unknown. Therefore, even if the UE uplink timing is synchronized to the downlink, it may still arrive at the base station receiver too late due to propagation delay. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L7/04
CPCH04W74/0833H04W74/002H04L7/041H04L7/043H04W74/006H04W72/30H04W72/23
Inventor R·巴尔德梅尔D·阿斯特利R·阿布拉哈姆森
Owner TELEFON AB LM ERICSSON (PUBL)