Unlock instant, AI-driven research and patent intelligence for your innovation.

Methods and apparatus for random access in multi-carrier communication systems

A wireless communication system and carrier technology, applied in the modulation carrier system, multi-frequency code system, wireless communication, etc., can solve the problems of shared channel bandwidth waste, long required time, difficult ranging process, etc.

Active Publication Date: 2010-02-24
NEOCIFIC INC
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 2. Interference between ranging signals and other uplink signals
[0007] 3. Detection performance and complexity at the base station receiver
When multiple mobile stations attempt ranging at the same time, they are forced to compete for access to the shared channel, and due to the large number of collisions, it becomes difficult for any mobile station to complete the ranging process
Therefore, it takes too much time for all mobiles to complete the ranging process, and a lot of bandwidth on the shared channel is wasted

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Methods and apparatus for random access in multi-carrier communication systems
  • Methods and apparatus for random access in multi-carrier communication systems
  • Methods and apparatus for random access in multi-carrier communication systems

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] In the following description, the invention is explained with respect to various embodiments thereof and specific details are provided for complete understanding. However, it will be understood by those skilled in the art that the present invention may be practiced without such details. In some instances, well-known structures and functions have not been shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

[0024] Unless the context clearly requires otherwise, throughout this specification and claims, the terms "comprises", "comprising", etc. should be interpreted in an inclusive sense rather than an exclusive or exhaustive sense, that is, its meaning is "including, but not limited to". Terms using the singular or the plural also include the plural or the singular, respectively. Furthermore, the terms "herein," "above," "below," and words of similar import, when used in this application, refer to this application as a whol...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

Methods and apparatus in a multi-carrier cellular wireless network (303, 304, 305, 320) with random access improve receiving reliability and reduce interference of uplink signals of a random access, while improving the detection performance of a base station receiver (310, 320) by employing specifically configured ranging signals.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Provisional Patent Application No. 60 / 551,589, filed March 9,2004. technical field [0003] The present application relates to the field of wireless communication, and more specifically, to a method and device for random access in a multi-carrier communication system. Background technique [0004] In a wireless communication system, a mobile station first needs to perform random access to establish communication with a base station. Random access generally includes two steps: (1) ranging, and (2) resource request and allocation. During ranging, the mobile station sends a signal to the base station so that the base station can identify the mobile station and measure the power and time delay of the mobile station and inform the mobile station for power adjustment and time advance. During resource request and allocation, uplink and downlink resources for communication are reques...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/69H04B1/707H04B1/713H04B7/005H04L27/26H04W52/50H04W74/08
CPCH04L27/2608H04L27/2602H04W74/08H04L27/2613H04W52/50H04W74/0833H04L5/0044H04W52/24H04J13/16
Inventor 李小东罗国扬李克民黄海明
Owner NEOCIFIC INC