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Null pilots for interference estimation in a wireless communication network

A technology for wireless communication network and interference estimation, which is applied in wireless communication, multiplexing communication, pilot signal allocation and other directions, and can solve problems such as affecting data transmission.

Active Publication Date: 2014-11-12
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The UE may experience interference from other cells (e.g., cells not in its serving cluster), which will affect data transmission from the serving cell or serving cluster to the UE

Method used

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  • Null pilots for interference estimation in a wireless communication network
  • Null pilots for interference estimation in a wireless communication network
  • Null pilots for interference estimation in a wireless communication network

Examples

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Embodiment Construction

[0019] The techniques described in this disclosure may be used in various wireless communication networks, such as CDMA, TDMA, FDMA, OFDMA, SC-FDMA, and others. The terms "network" and "system" are often used interchangeably. A CDMA network may implement a radio technology such as Universal Terrestrial Radio Access (UTRA), cdma2000, and so on. UTRA includes Wideband CDMA (WCDMA) and other variants of CDMA. cdma2000 covers IS-2000, IS-95 and IS-856 standards. A TDMA network may implement a radio technology such as Global System for Mobile Communications (GSM). OFDMA network 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 and E-UTRA are part of the Universal Mobile Telecommunications System (UMTS). 3GPP Long Term Evolution (LTE) and LTE-Advanced (LTE-A) are new releases of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A and GSM are described in docu...

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Abstract

Techniques for transmitting null pilots to support interference estimation in a wireless network are described. A null pilot is non-transmission on designated time-frequency resources by a cell or a cluster of cells supporting cooperative transmission to a UE. The received power of the null pilot from the cell or cluster of cells may be indicative of interference from other cells. In one design, a cell in the cluster may determine resources for sending a null pilot by the cell. The cell may transmit the null pilot (i.e., send no transmissions) on the resources to allow UEs to estimate out-of-cluster interference. Some or all cells in the cluster may transmit null pilots on the same resources. The cell may receive interference and channel information from the UE and may send data transmission to the UE based on the interference and / or channel information. Remaining cells in the cluster may reduce interference to the UE.

Description

[0001] This application claims U.S. Provisional Application No. 61 / 047,063, filed April 22, 2008, entitled "INTERACTIONS OFRESOURCE UTILIZATION MESSAGES (RUM) AND OTHER SECTOR INTERFERENCE (OSI) INDICATIONS," and filed October 24, 2008 Priority to U.S. Provisional Application No. 61 / 108,429, entitled "OUT-OF-CLUSTER INTERFERENCE ESTIMATION AND CLUSTER NULL PILOTS," which have been assigned to the assignee of the present application and are hereby incorporated by reference Incorporated into this article. technical field [0002] The present disclosure relates generally to communications and, more particularly, to techniques for estimating interference in wireless communications networks. Background technique [0003] Wireless communication networks are widely used to provide various communication contents, such as voice, video, packet data, messaging, broadcasting, and the like. These wireless networks may be multiple-access networks capable of supporting multiple users by s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W72/08
CPCH04L5/0048H04L5/0007H04J11/0059H04L5/0035H04W72/082H04W24/08H04W72/541H04B17/345H04L25/0224
Inventor N·布尚A·Y·戈罗霍夫M·J·博兰A·阿格拉瓦尔A·D·汉德卡尔季庭方
Owner QUALCOMM INC