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Method and system for planning down link auxiliary reference signal in multi-carrier wideband system

A multi-carrier system and downlink technology, applied in the field of frequency domain resource planning, can solve problems such as inability to optimize resource allocation, inability to correctly determine the pilot bandwidth of the UE's exact path loss, and traffic reduction.

Inactive Publication Date: 2009-04-15
NXP BV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Depending on the bandwidth of the pilot channel, this UL SRS scheme exhibits certain disadvantages
Potential reduction in traffic due to overuse of RS resources if wideband pilot channel is used for CQI measurement (i.e. sounding)
Moreover, the processing of UL SRS results in substantial interference to another cell, thus resulting in CQI measurement errors due to reduced pilot power density
In contrast, if the narrowband pilot channel is used for CQI measurement (i.e. sounding), the eNB cannot optimize resource allocation over the entire bandwidth
[0008] This adaptive RS scheme also exhibits certain disadvantages
If the adaptive frequency band pilot channel is used for CQI measurement (i.e. sounding), the eNB cannot correctly determine the UE allocation due to the fact that the eNB cannot know the exact path loss of each UE and the SINR of UL and DL is not the same. The pilot bandwidth

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  • Method and system for planning down link auxiliary reference signal in multi-carrier wideband system
  • Method and system for planning down link auxiliary reference signal in multi-carrier wideband system
  • Method and system for planning down link auxiliary reference signal in multi-carrier wideband system

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Embodiment Construction

[0023] According to one embodiment, a technique for allocating radio resources in a broadband multi-carrier system includes using a downlink (DL) reference signal (RS) instead of a conventional uplink (UL) RS. Although legacy base stations (eNBs) use dedicated RSs such as UL Sounding RSs (SRSs) proposed by 3GPP LTE, current 3GPP UL SRSs only support resource planning within a small frequency domain range, and UL SRSs with too many usages will Significantly reduces transmission efficiency. Accordingly, embodiments of the DL RS scheme and corresponding frame structures are implemented to support resource planning within the entire available frequency domain for wideband multi-carrier systems such as 3GPP LTE. As a matter of terminology, the DL RS described herein is also referred to as an Assisted RS (ARS).

[0024] In one embodiment, the eNB transmits the DLRS using a broadcast format over broadband. The DL RS may be sent on the entire DL frequency band (ie, the entire freque...

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Abstract

The invention provides a method and a system for making a resource plan for a downlink-aided datum signal in the multi-carrier wideband system. The system consists of a base station, user equipment and a transmission program manager. The base station transmits a downlink datum signal. The user equipment receives the downlink datum signal and obtains at least one channel state message with usable frequency band from the downlink datum signal which is used in the next downlink frequency band. The transmission program manager is coupled with the base station and distributes the wireless resources to the user equipment according to the channel state fed back by the user equipment. The feedback of the channel state is at least partially based on the channel state information.

Description

technical field [0001] The present invention relates to wireless communication systems, and more particularly to systems and methods for performing downlink sounding to perform frequency domain resource planning for multi-carrier systems. Background technique [0002] The Third Generation Partnership Project (3GPP) was established to produce globally applicable technical specifications and technical reports for third-generation mobile systems based on the evolved Global System for Mobile (GSM) communication core network, and to produce the Access technology (ie Universal Terrestrial Radio Access (UTRA) technology in frequency division duplex (FDD) and time division duplex (TDD) modes). The scope was subsequently modified to include the maintenance and development of GSM technical specifications and technical reports covering evolved radio access technologies (eg General Packet Radio Service (GPRS) and Enhanced Data Rates for GSM Evolution (EDGE)). [0003] In a 3GPP Long Te...

Claims

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Application Information

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IPC IPC(8): H04W16/02H04W72/04H04B1/707
CPCH04W72/0406H04W72/085H04W72/20H04W72/542
Inventor 张晓博马霓邬钢
Owner NXP BV
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