Method and system for carrying out non-periodic scheduling through physical downlink control channel (PDCCH)

A physical downlink control and non-periodic technology, which is applied in the direction of using the return channel for error prevention/detection, transmission system, digital transmission system, etc., can solve problems such as business performance degradation, and achieve the effect of improving business capacity decline

Active Publication Date: 2012-05-23
POTEVIO INFORMATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention provides a method and system for aperiodic scheduling through the physical downlink control channel PDCCH, which can improve the problem of service performance degradation caused by control channel scheduling SRS missed detection and false detection

Method used

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  • Method and system for carrying out non-periodic scheduling through physical downlink control channel (PDCCH)
  • Method and system for carrying out non-periodic scheduling through physical downlink control channel (PDCCH)
  • Method and system for carrying out non-periodic scheduling through physical downlink control channel (PDCCH)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Embodiment 1: The base station eNB realizes the retransmission of the SRS transmission indication signaling through the automatic error detection technology.

[0057] In Embodiment 1, after receiving the SRS transmission indication signaling, the UE transmits the SRS at the SRS transmission time specified in the SRS transmission indication signaling. The processing flow of the base station in Embodiment 1 is as follows figure 1 shown, including the following steps:

[0058] Step 101: the base station sends an SRS sending instruction signaling to the UE, and the SRS sending instruction signaling specifies the sending time of the SRS.

[0059] Step 102: The base station detects whether the SRS is received from the UE at the time of sending the SRS, if yes, execute step 104, otherwise execute step 103.

[0060] Step 103: the base station sends the same SRS transmission indication signaling to the UE again, and returns to step 102.

[0061] Step 104: Construct a new SRS ...

Embodiment 2

[0064] Embodiment 2: The UE realizes the retransmission of the SRS transmission indication signaling by using the automatic retransmission request technology.

[0065] In the second embodiment, after receiving the SRS transmission indication signaling, the UE immediately sends an acknowledgment message ACK to the base station in the next subframe, and then sends the SRS at the SRS transmission time specified in the SRS transmission indication signaling.

[0066] The processing flow of the base station in Embodiment 2 is as follows figure 2 shown, including the following steps:

[0067] Step 201: the base station sends an SRS transmission instruction signaling to the UE. The sending time of the SRS is specified in the SRS sending indication signaling.

[0068] Step 202: The base station judges whether the next subframe for sending the SRS sending instruction is received

[0069] An acknowledgment message ACK from the UE, if yes, go to step 204; otherwise go to step 203.

...

Embodiment 3

[0073] Embodiment 3: The base station eNB realizes the retransmission of the SRS transmission indication signaling through the redundant transmission technology.

[0074] The basic idea of ​​the third embodiment is that when the base station eNB determines that the UE signal is lower than a certain threshold, it sends multiple SRS transmission indication signaling of the UE on the same PDCCH channel; or, in the PDCCH of multiple consecutive downlink subframes Send the SRS transmission indication signaling of the UE.

[0075] The processing flow of embodiment three is as follows image 3 shown, including the following steps:

[0076] Step 301: The base station performs aperiodic SRS scheduling according to the prior art or the manner of Embodiment 1 or Embodiment 2.

[0077] Step 302: The base station receives the SRS signal from the UE, and judges whether the quality of the received SRS signal satisfies the trigger condition for repeatedly sending the SRS transmission instru...

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Abstract

The invention provides a method and system for carrying out non-periodic scheduling through a physical downlink control channel (PDCCH). A processing procedure of a base station comprises the following steps: A1, sending a scheduled configuration signaling to user equipment (UE) by a base station through the PDCCH, wherein the time of sending the scheduled uplink signaling is stipulated in the scheduled configuration signaling; B1, detecting that whether the scheduled uplink signaling from the UE is received or not by the base station at the time of sending the scheduled uplink signaling, constructing a new scheduled configuration signaling if the scheduled uplink signaling from the UE is received and returning to the step A1, or resending the same scheduled configuration signaling to the UE by the base station through the PDCCH if the scheduled uplink signaling from the UE is not received and repeatedly implementing the step B1. The invention further provides other methods and systems of carrying out non-periodic scheduling through the PDCCH. The scheme of the invention can be used for confronting the influence of wireless channel decline and improving the service capacity decline caused by missed detection or false detection of the scheduled configuration signaling.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a method and a system for aperiodic scheduling through a physical downlink control channel (PDCCH). Background technique [0002] In the LTE system of the long-term evolution system, the user equipment (UE) sends a measurement signal (SRS, Sounding Reference Signal) at a certain time-frequency position using a certain resource according to the configuration information of the base station (eNB), and the eNB measures according to the received SRS information Channel state information (CSI, Channel State Information), and perform operations such as dynamic scheduling, power control, and resource allocation according to the CSI information obtained through measurement. [0003] In a further evolution scheme of the LTE system, the SRS can be sent aperiodically through dynamic scheduling of the control channel. [0004] In the wireless communication system, due...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18H04L1/16H04L1/00
Inventor 陈光杰
Owner POTEVIO INFORMATION TECH
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