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Scheduling based on effective target load with interference cancellation in a wireless communication system

A technology of interference cancellation and wireless communication, applied in the field of communication, which can solve problems such as uplink transmission interference

Inactive Publication Date: 2014-02-19
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This scheduling is challenging due to interference between uplink transmissions from other UEs

Method used

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  • Scheduling based on effective target load with interference cancellation in a wireless communication system
  • Scheduling based on effective target load with interference cancellation in a wireless communication system
  • Scheduling based on effective target load with interference cancellation in a wireless communication system

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Embodiment Construction

[0021] The techniques described in this application may be used in various wireless communication systems, such as CDMA, TDMA, FDMA, OFDMA, SD-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 other variants of CDMA. cdma2000 covers IS-2000, IS-95 and IS-856 standards. A TDMA system implements a radio technology such as Global System for Mobile Communications (GSM). The OFDMA system can implement wireless technologies such as Evolved UTRA (E-UTRA), Ultra Mobile Broadband (UMB), IEEE 802.20, IEEE802.16 (WiMAX), 802.11 (WiFi), Flash- and many more. UTRA and E-UTRA are part of the Universal Mobile Telecommunications System (UMTS). 3GPP Long Term Evolution (LTE) is an upcoming version of UMTS that uses E-UTRA. UTRA, E-UTRA, UMTS, LTE and GSM are described in documents from an organiz...

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Abstract

Techniques for scheduling users for transmission on the uplink in a wireless communication system are described. A cell may perform interference cancellation for uplink transmissions and may observe lower effective noise and interference due to interference cancellation. The lower effective noise and interference may allow the cell to operate with a higher effective target load, which may support a higher overall throughput for the cell. In one design, an effective target load for a cell using interference cancellation may be determined, e.g., based on a target rise-over-thermal (RoT) for the cell and an interference cancellation efficiency factor. An available load for the cell may be determined based on the effective target load, which may be higher than a target load for the cell without interference cancellation. Users in the cell may then be scheduled for transmission on the uplink based on the available load.

Description

[0001] Claiming Priority Based on 35 U.S.C. §119 [0002] This patent application claims priority to US Provisional Application No. 60 / 975,853, filed September 28, 2007, which is assigned to the assignee of the present application and is expressly incorporated herein by reference. technical field [0003] In general, the present invention relates to communication, and in particular, the present invention relates to techniques for scheduling users in a wireless communication system. Background technique [0004] Wireless communication systems are widely deployed to provide various communication services such as voice, video, packet data, messaging, broadcast, and so on. These systems may be multiple-access systems capable of supporting multiple users by sharing 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) system...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W16/00H04W16/14H04W72/08H04W16/10
CPCH04W72/0486H04W72/082H04W72/52H04W72/541
Inventor D·张B·莫汉蒂S·D·桑布瓦尼
Owner QUALCOMM INC