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A method, device and system for sending feedback information

A technology of feedback information, equipment, applied in the field of communication

Active Publication Date: 2019-05-24
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Embodiments of the present invention provide a method, device and system for sending feedback information, so as to solve the problem of transmitting feedback information at the receiving end without using the PUCCH / PHICH feedback channel, so as to make the system more efficient

Method used

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  • A method, device and system for sending feedback information
  • A method, device and system for sending feedback information
  • A method, device and system for sending feedback information

Examples

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Embodiment 1

[0365] The embodiment of the present invention provides a method for sending feedback information. The base station sends data to the user equipment, and the user equipment needs to send the feedback information to the base station at the sending time or sending time period for sending the feedback information, that is, downlink data Taking the uplink feedback of the above as an example, the method of sending the feedback information is described in detail, such as Figure 5 As shown, the specific steps include:

[0366] Step 501, the base station sends data to the UE.

[0367] Wherein, the base station indicates on the physical downlink control channel (PDCCH for short) that there is a downlink resource allocation for a certain UE on the downlink shared channel (Downlink Shared Channel, DL-SCH for short), and the base station allocates downlink resources for the UE. Send data on the resource.

[0368] Step 502, the UE receives the data sent by the base station, judges wheth...

Embodiment 2

[0379] The embodiment of the present invention provides a method for sending feedback information, which is the same as the first embodiment, and the uplink feedback of downlink data is taken as an example. In this embodiment, the specific steps can refer to steps 501-503 in Embodiment 1. The difference from Embodiment 1 is that the UE does not need to determine the sending time or sending time period for sending feedback, and uses the first uplink MAC PDU The middle CE carries the feedback information.

[0380] In this embodiment, a new MAC CE is used in the MAC PDU to carry feedback information, wherein the LCID in the subheader corresponding to the newly added MAC CE in the MAC PDU is used as an indication of the new MAC CE to identify The new MACCE is used to carry feedback information. The MAC CE contains N bit feedback information, 0 means NACK, 1 means ACK, and the first bit corresponds to the HARQ process whose process number is 1, and the second bit corresponds to the...

Embodiment 3

[0383] The embodiment of the present invention provides a method for sending feedback information, also taking the uplink feedback of downlink data as an example, the difference from Embodiment 1 is that the MAC layer does not have a feedback mechanism, and the feedback information is carried in the RLC layer, such as Image 6 As shown, the present embodiment specifically includes:

[0384] Step 601, the base station sends n RLC PDUs to the UE.

[0385] Wherein, the RLC PDU sent by the base station to the UE is data information, and n is greater than or equal to 1.

[0386] Step 602, the UE receives the RLC PDU sent by the base station, and judges whether the information transmitted in the RLC PDU is correctly decoded, and generates an RLC PDU carrying feedback information.

[0387] Specifically, the RLC PDU sent by the base station to the UE is data information, and the format of the RLC feedback information generated by the UE includes: a data identifier and N information b...

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Abstract

The invention discloses a method, device and system for sending feedback information, relates to the field of communication technology, and solves the problem that a receiving end device transmits feedback information without using a PUCCH / PHICH feedback channel, so as to make the system more efficient. The method includes: the receiving end device receives the data sent by the sending end device; according to the received data, generates a protocol data unit PDU carrying feedback information; the feedback information is used to indicate whether the receiving end device correctly receives to the data; sending the PDU carrying the feedback information to the sending end device.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method, device and system for sending feedback information. Background technique [0002] In the current communication system, a hybrid automatic repeat request (Hybrid Automatic Repeat Request, HARQ for short) mechanism is used to send feedback information. Among them, the HARQ entity of the Medium Access Control (MAC) layer is responsible for the realization of the HARQ mechanism; the HARQ mechanism includes: the uplink feedback of the downlink data is transmitted in the physical uplink control channel (PUCCH for short), and the uplink The downlink feedback of data is transmitted in a physical HARQ indicator channel (physical HARQ indicator channel, PHICH for short). [0003] Some user equipment (UE for short), such as placed in iron boxes or basement meter terminals, may cause additional signal loss because they may be located in areas with poor base station ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W72/04
CPCH04L1/1664H04L1/1607H04L69/324H04L1/1822H04L1/1854H04W72/51H04W72/23H04L1/1812H04L1/1864H04L69/22H04W24/02H04W88/02
Inventor 胡振兴权威杨晓东张戬
Owner HUAWEI TECH CO LTD
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