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Random access signaling transmission for system access in wireless communication

A technology of random access and wireless communication, applied in the field of communication, can solve problems such as uplink interference

Active Publication Date: 2013-06-19
QUALCOMM INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Also, random access preambles and other signaling sent for system access may interfere with the uplink

Method used

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  • Random access signaling transmission for system access in wireless communication
  • Random access signaling transmission for system access in wireless communication
  • Random access signaling transmission for system access in wireless communication

Examples

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Embodiment Construction

[0022] The techniques described herein may be used in various wireless communication systems such as CDMA, TDMA, FDMA, OFDMA, SC-FDMA, and others. The terms "system" and "network" are often used interchangeably. A CDMA system may implement a radio technology such as Universal Terrestrial Radio Access (UTRA), cdma2000, and others. UTRA includes wideband CDMA (W-CDMA) and low code rate (LCR), cdma2000 covers IS-2000, IS-95 and IS-856 standards. TDMA can implement a radio technology such as Global System for Mobile Communications (GSM). OFDMA can implement such as Evolved UTRA (E-UTRA), Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, and other wireless technologies. UTRA, E-UTRA and GSM are part of the Universal Mobile Telecommunications System (UMTS). 3GPP Long Term Evolution (LTE) is an upcoming release of UMTS that uses E-UTRA, which uses OFDMA on the downlink and SC-FDMA on the uplink. UTRA, E-UTRA, GSM, UMTS and LTE are described in...

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Abstract

Techniques for transmitting random access signaling for system access are described. In an aspect, random access signaling may be sent based on at least one transmission parameter having different values for different user equipment (UE) classes. At least one parameter value may be determined based on a particular UE class, and the random access signaling may be sent based on the determined parameter value(s). The random access signaling may be a random access preamble, and the at least one transmission parameter may include a target SNR, a backoff time, and / or a power ramp. The random access preamble may then be sent based on a target SNR value, a power ramp value, and / or a backoff time value for the particular UE class. In another aspect, a message for system access may be sent based on a power control correction received in a random access response for the random access preamble.

Description

[0001] This application claims priority to US Provisional Application No. 60 / 828,058, filed October 3, 2006, which is assigned to its assignee and is incorporated herein by reference. technical field [0002] The present invention relates generally to communications, and more particularly to techniques for accessing wireless communication systems. Background technique [0003] Wireless communication systems are widely deployed to provide various communication content such as voice, video, packet data, messaging, broadcast, and so on. These wireless systems may be multiple-access systems capable of supporting multiple users by sharing the available system resources. Examples of such multiple access systems include Code Division Multiple Access (CDMA) systems, Time Division Multiple Access (TDMA) systems, Frequency Division Multiple Access (FDMA) systems, Orthogonal FDMA (OFDMA) systems, and Single Carrier FDMA (SC-FDMA) system. [0004] A wireless communication system may i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/00H04W52/16H04W52/28H04W52/32H04W52/50H04W74/08
CPCH04W74/002H04W52/16H04W74/0833H04L5/0053H04W52/50H04W74/0866Y02B60/50H04W52/325H04L1/0029H04W52/281H04L1/0032H04L1/0057H04W88/02H04W74/08H04W52/18
Inventor A·达姆尼亚诺维奇J·蒙托霍D·P·马拉蒂
Owner QUALCOMM INC
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