Feedback method and device for uplink access link channel quality instruction

A technology of channel quality indication and access link, applied in the field of long-term evolution system, can solve the problem of no research, and achieve the effect of ensuring backward compatibility, flexible notification method, and easy unified scheduling

Active Publication Date: 2014-12-10
ZTE CORP
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, the research on the CQI measurement of the uplink access link is a hot spot. For example, the channel quality of the uplink access link is obtained by measuring the Sounding Reference Signal (SRS) transmitted by the terminal uplink, which is used for relay nodes or base stations. Carry out subsequent uplink resource scheduling, but there is no research on how the relay node feeds back the CQI of the uplink access link to the base station, and this is exactly the problem to be solved by the invention, so that the base station can perform unified scheduling

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Feedback method and device for uplink access link channel quality instruction
  • Feedback method and device for uplink access link channel quality instruction
  • Feedback method and device for uplink access link channel quality instruction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] When the R-PUCCH only bears the CQI of the uplink access link, the base station needs to reserve m resources for the RN to bear the CQI of the uplink access link. Figure 5 A schematic diagram of reserving m consecutive CQI resources for each RN, such as Figure 5 As shown, 8 consecutive CQI resources are reserved for RN1, and 4 consecutive CQI resources are reserved for RN2, which only carry uplink access link CQI. The total number of resource blocks carrying CQI is determined according to the total number of resources required by the system. , assuming that at this time N RB ( 2 ) = 2 , The number of subcarriers in the frequency direction of each resource block is N sc RB = 12 (When the subcarrier spacing is 15kHz, N sc ...

Embodiment 2

[0052] When the R-PUCCH carries the CQI of the uplink access link and the format 2 / 2a / 2b of the uplink relay link, the base station needs to reserve m+1 resources for each RN. At this time, format2 / 2a / 2b can carry On any resource, preferably, the first resource bears the format 2 / 2a / 2b of the uplink relay link, and the other m resources bear the CQI of the uplink access link.

[0053] Image 6 A schematic diagram of reserving m+1 continuous CQI resources for each RN, such as Image 6 As shown, m+1=8+1 continuous CQI resources are reserved for RN1, m+1=4+1 continuous CQI resources are reserved for RN2, and the uplink access link CQI and uplink relay link are fed back format 2 / 2a / 2b, the number of resource blocks carrying CQI is determined according to the total number of resources required by the system, assuming that at this time N RB ( 2 ) = 3 , ...

Embodiment 3

[0058] When the R-PUCCH carries the CQI of the uplink access link and the format 2 / 2a / 2b of the uplink relay link, the base station needs to reserve m+1 resources for each RN. At this time, format2 / 2a / 2b can carry On any resource, preferably, the first resource bears the format 2 / 2a / 2b of the uplink relay link, and the other m resources bear the CQI of the uplink access link.

[0059] Such as Figure 7 As shown, m+1 discontinuous CQI resources are reserved for each RN to feed back the format 2 / 2a / 2b of the uplink access link CQI and the uplink relay link, and the uplink access link CQI resource and the uplink relay link The interval between format 2 / 2a / 2b resources of the link is variable, such as Figure 7 Among them, m+1=8+1 discontinuous CQI resources are reserved for RN1, m+1=4+1 discontinuous CQI resources are reserved for RN2, and the number of resource blocks carrying CQI is based on the total required by the system The number of resources is determined, assuming that...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention discloses a method for feeding back a channel quality indicator of an uplink access link. The method includes the following steps: a relay node (RN) measures the channel quality indicator (CQI) of an uplink access link; a physical uplink control channel of a relay link (R-PUCCH) bears the CQI of the uplink access link, or a physical uplink shared channel of the relay link (R-PUSCH) bears the CQI of the uplink access link; the RN sends the CQI to a base station. The present invention also discloses an apparatus for feeding back the channel quality indicator of the uplink access link. With the technical scheme of the present invention, the problem that the RN feeds the CQI of the uplink access link back to the base station can be solved, thus the backward compatibility (compatible with the long time evolution (LTE) system) can be ensured, and the technical scheme of the present invention can be adapted for the link from the RN to the base station appropriately. The technical scheme of the present invention has a flexible notifying manner, and facilitates the base station to perform a schedule uniformly.

Description

technical field [0001] The present invention relates to a long-term evolution system (Long Time Evolution, LTE) and an advanced long-term evolution system (Long Term Evolution Advanced, LTE-A), in particular to a connection between a terminal (UserEquipment, UE) and a relay node (Relay NodeB, RN). A channel quality indicator (ChannelQuality Indicator, CQI) feedback technology. Background technique [0002] LTE system, LTE-A system, and IMT-Advanced (International MobileTelecommunication Advanced, advanced international mobile communication system) are all based on Orthogonal Frequency Division Multiplexing (OFDM) technology. In the OFDM system, mainly Time-frequency two-dimensional data form, such as figure 1 As shown, in LTE and LTE-A, RB (Resource Block, resource block; resource block mapping on physical resources is called PhysicalResource Block, physical resource block) is defined as within one continuous slot (time slot) in the time domain OFDM symbols, 12 or 24 conse...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & AuthorityPatents(China)
IPC IPC(8): H04L1/16H04L1/00H04W28/26H04W74/08H04W72/54
CPCH04L5/0007H04L5/0057H04L1/0027H04W84/047H04B7/15507H04L1/0026H04L5/1469
Inventor毕峰杨瑾梁枫袁明吴栓栓陈东丽王琴
OwnerZTE CORP