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Srs optimization for coordinated multi-point transmission and reception

A technology of user equipment and transmission power, which is applied in wireless communication, power management, electrical components, etc., and can solve problems such as performance degradation and transmission interference

Inactive Publication Date: 2014-07-23
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the downlink, a transmission from a base station may observe interference due to transmissions from neighboring base stations
On the uplink, transmissions from a UE may interfere with transmissions from other UEs communicating with neighboring base stations
This interference can degrade performance on both the downlink and uplink

Method used

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  • Srs optimization for coordinated multi-point transmission and reception
  • Srs optimization for coordinated multi-point transmission and reception
  • Srs optimization for coordinated multi-point transmission and reception

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Embodiment Construction

[0026] Aspects of the present disclosure provide methods that can enhance sounding reference signal (SRS) procedures for coordinated multipoint (CoMP) systems. As will be described in more detail below, a UE participating in CoMP operation may be configured to transmit two different sets of SRS signals. For example, a first set of SRSs may be intended for the serving cell only, while a second set of SRSs may be intended for joint reception of multiple cells.

[0027] The techniques described herein may be used for various wireless communication networks such as CDMA, TDMA, FDMA, OFDMA, SD-FDMA, and other networks. 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 can implement a radio technology such as Global ...

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Abstract

Certain aspects of the present disclosure relate to techniques for power control and SRS multiplexing for coordinated multi-point (CoMP) transmission and reception in heterogeneous networks (HetNet). Multiple SRS processes are supported with different physical and / or virtual cell ID. Different power control offsets and processes are associated with the different SRS processes.

Description

[0001] Claiming Priority Based on 35 U.S.C. §119 [0002] This patent application claims the benefit of U.S. Provisional Application No. 61 / 542,669, filed October 3, 2011, entitled "SRS OPTIMIZATION FOR COORDINATED MULTI-POINT TRANSMISSION AND RECEPTION," which is assigned to this application assignee, which is hereby expressly incorporated by reference. technical field [0003] In general, certain aspects of the present disclosure relate to wireless communications, and more specifically, certain aspects of the present disclosure relate to power control for coordinated multipoint (CoMP) transmission and reception in a heterogeneous network (HetNet) and user-reusable technology. Background technique [0004] Wireless communication networks are widely deployed to provide various communication services such as voice, video, packet data, messaging, broadcast, and so on. These wireless networks may be multiple-access networks capable of supporting multiple users by sharing avai...

Claims

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Application Information

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IPC IPC(8): H04W52/32
CPCH04W52/12H04W52/146H04W52/325H04W52/04
Inventor 徐浩J·蒙托霍骆涛P·加尔
Owner QUALCOMM INC