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Data transmission method and device

A data transmission method and data technology, applied in the field of communication, can solve problems such as poor system transmission performance

Active Publication Date: 2015-06-24
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] Aiming at the problem of poor system transmission performance when working with unlicensed spectrum in the related art, the present invention proposes a data transmission method and device, which can flexibly adjust the data transmission of the HARQ process, avoid using carriers with severe interference for retransmission, and improve transmission performance

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Examples

Experimental program
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Embodiment 1

[0219] Embodiment 1: The carriers aggregated or activated by the terminal are 2 FDD carriers, that is, N=2, and the maximum number of HARQ processes for each carrier is 8, that is, To implement data retransmission and change the carrier, the specific operations are as follows:

[0220] Mode 1) The HARQ process number field can at least indicate A=N×X=16, or different process IDs, including Bit information, the different binary combination states of 4-bit information represent 16 different process numbers, and the process numbers are 0 to 15, which correspond to 16 different processes respectively, as shown in Table 2;

[0221] Way 2) Suppose X max =15, the HARQ process number field can at least indicate A=N×X max = 30 different process numbers, including Bit information, different binary combination states of 5-bit information can indicate up to 32 different process numbers, and the process numbers are 0 to 31, corresponding to 32 processes respectively, as shown in Ta...

Embodiment 2

[0232] Embodiment 2: The carrier aggregated or activated by the terminal is 2 TDD carriers, the TDD uplink and downlink configuration of carrier 0 is configuration 0, and the maximum number of HARQ processes is 4, that is, X 0 =4, the TDD uplink and downlink configuration of carrier 1 is configuration 6, and the maximum number of HARQ processes is 6, that is, X 1 =6, in order to realize data retransmission and change the carrier, the specific operations are as follows:

[0233] Mode 1) The HARQ process number field can at least indicate different HARQ process numbers, including at least Bit information, the specific indication relationship is shown in Table 2; since only a maximum of 10 processes need to be indicated in this implementation, only the first 10 states in Table 2 can be defined, and the remaining states are reserved;

[0234] Mode 2) The HARQ process number field can at least indicate different HARQ process numbers, including at least Bit information, the ...

Embodiment 3

[0241] Embodiment 3: The carriers aggregated or activated by the terminal are 1 FDD carrier (carrier 0) and 2 TDD carriers (carrier 1 and carrier 2), that is, N=3, N 1 =1,N 2 =2, the maximum number of HARQ processes for carrier 0 is 8, that is The TDD uplink and downlink configuration of carrier 1 is configuration 2, and the maximum number of HARQ processes is 10, that is, The TDD uplink and downlink configuration of carrier 2 is configuration 4, and the maximum number of HARQ processes is 12, that is, To implement data retransmission and change the carrier, the specific operations are as follows:

[0242] Mode 1) The HARQ process number field can at least indicate or different HARQ process numbers, including at least Bit information, the specific indication relationship is shown in Table 3; since only a maximum of 30 processes need to be indicated in this implementation, only the first 30 states in Table 3 can be defined, and the remaining states are reserved;

[...

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Abstract

Disclosed are a data transmission method and device. The method comprises: receiving a PDCCH, wherein the PDCCH comprises an indication domain which can at least indicate different HARQ processes the number of which is a sum of maximum HARQ process numbers of a plurality of carriers, and initial transmission and retransmission of data in the same HARQ process use different carriers; and receiving data scheduled by the PDCCH according to the PDCCH. By means of the present application, transmission carriers during initial transmission and retransmission of data in the same process can be adjusted flexibly, so that, when interferences to some carrier(s) are serious, data transmission in the process is adjusted to a carrier or carriers to which interference conditions are not serious, so as to improve system transmission efficiency.

Description

technical field [0001] The present invention relates to the field of communications, and in particular, to a data transmission method and apparatus. Background technique [0002] With the continuous growth of mobile data traffic, spectrum resources are becoming more and more scarce. Only using licensed spectrum resources for network deployment and service transmission may no longer meet the traffic demand. Therefore, the Long Term Evolution (LTE, Long Term Evolution) system considers Transmissions can be deployed on unlicensed spectrum resources to improve user experience and extend coverage. [0003] (1) Downlink data transmission method [0004] In the LTE system, the UE only works on one carrier; in the Long Term Evolution-Advance (LTE-A, Long Term Evolution-Advance) system, the UE can work on N carriers simultaneously. The downlink data on each carrier is retransmitted through the Physical Downlink Control Channel (PDCCH, Physical Downlink Control Channel) scheduling. ...

Claims

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Application Information

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IPC IPC(8): H04L1/18H04W72/04H04W16/14
CPCH04L1/1896H04W16/14H04W72/52H04W72/543H04L1/1822H04L1/1825H04L1/1893H04W72/23H04W72/542H04L1/1854H04L5/14H04W72/1215
Inventor 高雪娟林亚男沈祖康
Owner DATANG MOBILE COMM EQUIP CO LTD
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