Data channel procedure for systems employing frequency diversity

A frequency diversity, frequency technology, applied in the direction of frequency diversity, diversity/multi-antenna system, transmission system, etc.

Inactive Publication Date: 2006-08-23
MOTOROLA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These disadvantages are related to the limitations of data communications, and the need to meet the F

Method used

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  • Data channel procedure for systems employing frequency diversity
  • Data channel procedure for systems employing frequency diversity
  • Data channel procedure for systems employing frequency diversity

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Embodiment Construction

[0016] The present invention provides a unique system and method for processing and transmitting data between remote mobile units. The present invention can be applied to communications in wireless systems. More particularly, the present invention relates to facilitating communication between digital devices that use spread spectrum coding to transmit data.

[0017] Referring initially to FIG. 1, this block diagram illustrates a wireless communication system in an environment in which the present invention may be applied. It should be noted that the present invention can also be applied directly between devices not operating in the illustrated system, which case will be discussed with reference to FIG. 1B . As shown in FIG. 1 , the fixed portion 108 includes one or more base stations 106 that provide communication services for a plurality of remote user devices 102 . The base station 106 is coupled by a communication link, preferably in communication with the user equipment ...

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Abstract

The invention relates to a method for use in wireless data communications for facilitating two way data transfer between devices employing frequency diversity. It is generally suited toward units accomplishing frequency diversity by way of frequency hopped spread spectrum operation. The basic unit of the invention is an individual data frame whose reliability is enhanced by a unique combination of redundant error correction coding, time-, and frequency-diversity. The invention further extends the individual data frame concept to a complete asynchronous data message which comprises both a call establishment phase and a traffic phase. The traffic phase extends the basic data frame to encompass a complete data message. That message, which already contains the enhancements of the basic data frame, is further enhanced by repeating itself as many times as can fit in the transmission. In order to allow asynchronous operation, the call establishment phase is sent using a known frequency sequence, while the traffic phase is pseudorandomly ordered in such a manner that the entire transmission appears pseudorandom, and all frequencies are employed equally on average.

Description

technical field [0001] The present invention relates to wireless communication systems. In particular, the present invention relates to data channel procedures that facilitate communication transfers between digital devices using frequency hopping. Background technique [0002] The wireless industry has grown rapidly in the past few years. Wireless communications have become a standard part of everyday life. Most people use various forms of wireless communications such as Global System for Mobile Phones (GSM), Universal Mobile Telecommunications System (UMTS), Carrier Sense Multiple Access (CDMA) and 802.11 in various aspects of their daily lives. [0003] Typically, wireless systems are designed for a certain coverage area or footprint. These areas are often referred to as cells. Cells allow multiple sources to reuse similar frequencies to serve large metropolitan areas some distance apart. The geographic size of the cells does not have to be uniform within a given are...

Claims

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Application Information

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IPC IPC(8): H04B7/00H04B1/00H04B1/713H04B7/12H04L1/00H04L1/04H04L1/08
CPCH04L1/04H04L1/0059H04B1/713H04L1/08H04B7/12H04L1/0061
Inventor 布雷德利·J·雷恩博尔特安托尼·罗德里格斯
Owner MOTOROLA INC
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