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Data retransmission method and device

A data retransmission and data technology, applied in the field of data retransmission, can solve the problem of high conflict rate of data retransmission, and achieve the effect of reducing the conflict rate

Active Publication Date: 2018-07-24
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0032] The embodiment of the present invention provides a method and device for data retransmission, so as to at least solve the problem in the related art that the data retransmission conflict rate is relatively high when the terminal retransmits data

Method used

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  • Data retransmission method and device
  • Data retransmission method and device

Examples

Experimental program
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Effect test

specific Embodiment 1

[0111] Case 1: Different terminals can be distinguished by MA Signature, that is to say, MA Signatures of different terminals do not conflict with the HARQ process. The data interaction between the terminal and the network side includes the following steps:

[0112] In the first step, the terminal sends uplink data: when the terminal sends data, the terminal may consider that one, two or more terminals send uplink data on the same time-frequency resource.

[0113] In the second step, the network side feeds back the received data: the feedback from the network side includes the following situations:

[0114] (1) The network side does not send anything because it cannot detect anything;

[0115] (2) The network side can detect all or part of the terminals, and all or part of the terminal's data is successfully analyzed; then the network side sends ACK to the terminals that are successfully identified and the data is successfully analyzed; and for the terminals that are successf...

specific Embodiment 2

[0148] Different terminals can be distinguished by MA Signature, which means that the MA Signatures of different terminals do not conflict, and the terminal includes the following situations when sending a single data packet:

[0149] For underlying retransmission (HARQ):

[0150] In the first step, terminals UE_1 and UE_2 both send uplink data, corresponding to PUSCH_1 and PUSCH_2 respectively;

[0151] In the second step, the network side does not send anything because it cannot detect anything;

[0152] In the third step, if the terminal does not receive anything, there may be two possibilities: (1) think that the base station has not sent anything; (2) think that the base station has sent feedback, but lost it;

[0153] Although there are two possibilities, the possible processing method on the terminal side is to resend the data and process it as a new transmission.

[0154] Higher layer retransmission (ARQ):

[0155] Method 1: After the underlying HARQ retransmission ...

specific Embodiment 3

[0164] Different terminals can be distinguished by MA Signature, which means that the MA Signatures of different terminals do not conflict, and the terminal sends a single data packet.

[0165] For underlying retransmission (HARQ):

[0166] In the first step, terminals UE_1 and UE_2 both send uplink data, corresponding to PUSCH_1 and PUSCH_2 respectively;

[0167] In the second step, the network side can detect UE_1 and UE_2, and all PUSCH_1 and PUSCH_2 are resolved successfully, then the network side sends ACK to UE_1 and UE_2 (which can be distinguished by MA Signature);

[0168] In the third step, the terminal that receives the ACK does not need to do anything; if the terminal does not receive anything (there may be feedback loss), then there may be two interpretations: think that the base station has not sent anything or think that the base station has sent feedback, But it is lost; although there are two understandings, the possible processing method on the terminal side...

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Abstract

The invention provides a data retransmission method and device. The method comprises the following step: determining to-be-retransmitted data; and retransmitting the data by using a predetermined retransmission way, wherein the predetermined retransmission way comprises one of the followings: retransmitting the data through a multi-access signature MA signature indicated by a downlink control channel by using the network side, and retransmitting the data through the multi-signature MA signature indicated by the downlink control channel by using a terminal identifier ID and the network side. Through the retransmission method provided by the invention, the problem that the data transmission is high collision rate when the terminal retransmits the data in the related technology is solved, and then the effect of reducing the collision rate of the data retransmission is reduced.

Description

technical field [0001] The present invention relates to the communication field, in particular, to a data retransmission method and device. Background technique [0002] A Long Term Evolution (LTE for short) network includes: an Evolved Universal Terrestrial Radio Access Network (Evolved Universal Terrestrial Radio Access Network, E-UTRAN for short) and a core network (Core Network, CN for short). The E-UTRAN includes: an evolved base station (evolved Node B, eNB for short). The CN includes: a mobile management entity (Mobile Management Entity, MME for short), a serving gateway (Serving Gateway, S-GW for short), and the like. The eNB and CN are connected through the S1 interface, and the eNBs can be connected through the X2 interface. One eNB can manage one or more cells (Cell). An interface between a user equipment, also called a terminal (User Equipment, UE for short) and a cell is called a Uu interface (or an air interface). figure 1 It is a schematic diagram of the L...

Claims

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Application Information

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IPC IPC(8): H04W72/04H04W72/14H04L1/00H04L1/18H04L5/00
CPCH04L1/0023H04L1/0033H04L1/1812H04L1/1829H04L1/1867H04L1/1893H04L5/0014H04W72/23H04W74/0833H04L1/08H04L1/189H04L1/1864H04L1/1887H04L5/0044H04L5/0055H04W28/02
Inventor 张冬英吴昱民
Owner ZTE CORP
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