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Method and apparatus for selecting and using communication resources in a communication system

A communication pair, the selected technology, applied in the separation device of the transmission path, wireless communication, transmission system, etc., can solve the problems of wireless terminals lacking central coordination equipment, interference, destruction, etc.

Active Publication Date: 2016-01-20
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, it should be appreciated that in an ad hoc network, the problem of interference caused by I / Q imbalance is more damaging due to the random location of wireless terminals and the absence of a central coordinating device (e.g., a base station)

Method used

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  • Method and apparatus for selecting and using communication resources in a communication system
  • Method and apparatus for selecting and using communication resources in a communication system
  • Method and apparatus for selecting and using communication resources in a communication system

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Embodiment Construction

[0026] figure 2 An exemplary wireless peer-to-peer communication system 200 is depicted in accordance with an exemplary embodiment. The exemplary wireless peer-to-peer communication system 200 includes a plurality of wireless communication devices (device 1 202, device 2 204, device 3 206, device 4 208, device 5 210, device 6 212, device 7 214, ..., device N 218). Some of the wireless communication devices in system 200, such as device 5210, include an interface 222 to the Internet and / or other network nodes. Some of the wireless communication devices in system 200 (eg, device 1 202, device 2 204, device 3 206, device 4 208, device 6 212, device 7 214, and device N 218) are mobile wireless communication devices, such as handheld mobile devices.

[0027] Communication devices (202, 204, 206, 208, ..., 218) support various signaling between peers (e.g., peer discovery signals, pilot signals, transmission request signals, etc.) data transfer between.

[0028] image 3 is a d...

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Abstract

This application describes methods and apparatus for determining (eg, selecting) communication resources (eg, tones) to use in a communication system. The method described is well suited for Orthogonal Frequency Division Multiplexing (OFDM) systems. A device attempting to send a message selects a pair of tones for sending the message. Each tone pair consists of a tone and a corresponding mirror image tone. By constraining a communicating device to select pairs of communication frequencies, the path loss from the transmitter to the receiver for both tones will Most likely the same, and the transmit power level is controlled by a single device using both tones, mitigating the problems of interference and reduced dynamic range at the receiver due to IQ imbalance.

Description

technical field [0001] Various embodiments relate to wireless communications, and more particularly, to methods and apparatus for determining (eg, selecting) communication resources (eg, tones) for transmission purposes. Background technique [0002] In OFDMA (Orthogonal Frequency-Frequency-Division Multiple Access) based systems, the system frequency-time resources are often divided into small resource units that can be allocated to a number of different devices for transmission purposes. The smallest resource unit typically occupies one tone in the frequency domain and one OFDM symbol in the time domain. The tones used by devices in a communication system for transmission purposes can have a significant effect on interference (eg, interference caused by in-phase and quadrature-phase signal imbalances). [0003] In-phase (I) and quadrature-phase (Q) signal imbalance (often called IQ imbalance) occurs when the in-phase and quadrature components are not perfectly symmetrical...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L5/00H04L27/26
CPCH04L5/00H04L5/0007H04L27/2601H04L5/003H04W72/542H04L27/26
Inventor X·吴S·苏布拉玛尼安厉隽怿
Owner QUALCOMM INC
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