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Method and equipment for indicating channel resource of feedback information

A technology for feedback information and channel resources, applied in the directions of network traffic/resource management, transmission path sub-channel allocation, wireless communication, etc., can solve the problem of underutilization of 2-bit DAI information, etc., to increase downlink control signaling overhead, change Small, simple to achieve

Active Publication Date: 2011-06-01
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the 2-bit DAI information in the DL grant is not fully utilized in the LTE-A TDD system

Method used

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  • Method and equipment for indicating channel resource of feedback information
  • Method and equipment for indicating channel resource of feedback information
  • Method and equipment for indicating channel resource of feedback information

Examples

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Effect test

example 1

[0194] The UE is configured with 2 carriers, works in TDD uplink and downlink configuration 1, and adopts PUCCH Format1b with channel selection transmission mode. The base station first configures 4 groups of semi-static ACK / NACK channel resources for the UE through RRC signaling, each group contains 4 uplink control channel resources in PUCCH format 1 / 1a / 1b format, and the corresponding relationship between DAI status and channel resource group numbers As shown in Table 3, the specific ACK / NACK channel resource indication process is as follows: the base station selects the semi-static resource group numbered 3 as the channel resource group configured for the UE, and assigns all the DL grants of the downlink data packets included in the feedback window The 2-bit DAI is set to "11", and the UE is dynamically notified through the PDCCH carrying the DL grant, such as Figure 6 As shown; UE determines its channel selection resource number according to the 2-bit DAI information in ...

example 2

[0196] The UE is configured with 3 carriers, works in TDD uplink and downlink configuration 0, and adopts PUCCH Format1b with channel selection transmission mode. The base station first configures three semi-static ACK / NACK channel resources for the UE through RRC signaling, and the specific ACK / NACK channel resource indication process is as follows: the base station follows the following steps: Figure 7 It is shown that each channel resource corresponds to a DL grant, and the UE is dynamically notified through the PDCCH carrying the DL grant; the UE detects the 2-bit DAI information in the DL grant and the carrier number in the feedback window, according to the carrier number. map to big order 0≤i≤2.

example 3

[0198] The UE is configured with 4 carriers, works in TDD uplink and downlink configuration 0, adopts the PUCCH Format1b with channel selection transmission mode, adopts the cross-carrier scheduling mode, and the DL grant of all data packets in the feedback window is on the downlink main carrier (set as the downlink carrier 1) is sent on the PDCCH, and it is agreed that the DAI "00" state indicates the use of implicit resources. The specific ACK / NACK channel resource indication process is as follows: the base station sets the 2-bit DAI in each DL grant in the feedback window to "00", and dynamically notifies the UE through the PDCCH carrying the DL grant, as shown in Figure 8 As shown; according to the DAI indication in the PDCCH, the UE obtains it through the first CCE number of each PDCCH according to the Rel-8 implicit resource indication method 0≤i≤3.

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Abstract

The embodiment of the invention provides a method for indicating a channel resource of feedback information. The method comprises the following steps that: a base station transmits a downlink allocation index (DAI) to user equipment (UE) in a downlink dispatching signaling (DL grant), wherein the DAI bit at least can be used for indicating the channel resource of the feedback information; and the base station transmits the DL grant to the UE through a physical downlink control channel (PDCCH). In the scheme provided by the invention, the indication of the acknowledgement character / negative acknowledgement character (ACK / NACK) channel resource used by LTE-A UE can be realized by reusing the 2 bit DAI in the DL grant of a long term evolution time division duplexing (LTE TDD) system without adding an additional bit in the PDCCH. The method is simple and is easy to implement and is applied to an ACK / NACK multiplexing transmission mode of an LTE-A TDD system; and the downlink control signaling overhead is not increased.

Description

technical field [0001] The present invention relates to the field of digital communication, in particular, the present invention relates to a channel resource indication method and equipment for feedback information. Background technique [0002] LTE-A (Long Term Evolution-Advanced) is the subsequent evolution of LTE technology, commonly known as 3.9G. Compared with 4G, LTE (Long Term Evolution, long-term evolution) has reached the requirements of 4G standards except that the maximum bandwidth and uplink peak rate are slightly lower than the requirements of 4G. The overall technical design of LTE-A, which officially brings LTE into 4G, far exceeds the minimum requirements of 4G. In June 2008, 3GPP completed the LTE-A technical requirements report and proposed the minimum requirements for LTE-A: the peak downlink rate is 1Gbps, the peak uplink rate is 500Mbps, and the peak spectrum utilization rate for uplink and downlink reaches 15Mbps / Hz and 30Mbps / Hz respectively. Hz. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18H04W28/18
CPCH04L1/1671H04W72/042H04L1/0029H04L5/0007H04L5/0053H04L5/0055H04L5/0091H04W72/23
Inventor 高雪娟林亚男沈祖康潘学明
Owner DATANG MOBILE COMM EQUIP CO LTD
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