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Efficient signaling over access channel

A technology for accessing terminals and pilot signals, applied in the field of data transmission

Active Publication Date: 2013-04-03
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Embodiments of the present invention also address the problem of how to efficiently send information about the quality of the forward link channel over the access channel during access preamble transmission

Method used

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  • Efficient signaling over access channel
  • Efficient signaling over access channel
  • Efficient signaling over access channel

Examples

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Embodiment Construction

[0025] The word "exemplary" is used herein to mean "serving as an example, illustration or illustration". Any embodiment or design described herein as "exemplary" is not to be construed as preferred or advantageous over other embodiments or designs.

[0026] The techniques described in this invention for employing multiple modulation schemes for a single packet can be used in various communication systems, such as Orthogonal Frequency Division Multiple Access (OFDMA) systems, Code Division Multiple Access (CDMA) systems, Time Division Multiple Access (TDMA) systems, ) systems, Frequency Division Multiple Access (FDMA) systems, Orthogonal Frequency Division Multiplexing (OFDM) based systems, Single Input Single Output (SISO) systems, Multiple Input Multiple Output (MIMO) systems, and the like. These techniques can be used in systems that use incremental redundancy (IR) or in systems that don't use IR (eg, systems that only duplicate data).

[0027] Embodiments of the invention...

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Abstract

An apparatus and method for transmitting an indicator of channel quality while minimizing the use of a broadcast channel is described. A metric of forward link geometry of observed transmission signals is determined. An indicator of channel quality value is determined as a function of the observed transmission signals. An access sequence is selected, randomly, from one group of a plurality of groups of access sequences, wherein each of the plurality of groups of access sequences correspond to different ranges of channel quality values.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to US Provisional Application No. 60 / 590,113, filed July 21, 2004, which is hereby incorporated by reference in its entirety. field of invention [0003] In general, the present invention relates to wireless communication, and in particular, the present invention relates to data transmission in multiple access wireless communication systems. technical background [0004] The access terminal initially contacts the access point on the reverse link using the access channel. An access terminal may initiate an access attempt to request a dedicated channel, to register, or to perform a handover, among other things. Before initiating an access attempt, an access terminal receives information from downlink channels to determine the strongest signal strength from nearby access points and to acquire downlink opportunities. The access terminal may then decode information transmitted by a given a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W48/08H04W72/54H04W74/08
Inventor 阿若克·苏提望爱德华·哈里森·蒂格亚历克瑟·戈罗霍夫
Owner QUALCOMM INC