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Data transmission method and system

A data transmission method and data technology, applied in the field of data transmission, can solve problems such as uplink transmission conflicts and waste of uplink resources, and achieve the effects of avoiding overhead, reducing signaling overhead, and avoiding data transmission conflicts

Active Publication Date: 2011-11-09
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0028] In view of this, the main purpose of the present invention is to provide a data transmission method for solving the technical problems of uplink transmission conflict or waste of uplink resources in the wireless relay network system without introducing R-PHICH

Method used

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  • Data transmission method and system

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0113] figure 2 It is a flow chart of Embodiment 1 of the present invention, and this embodiment adopts scheme 1, that is, network element 1 notifies network element 2 of the HARQ feedback of the medium access control layer protocol data unit (MACPDU) in its HARQ buffer through explicit signaling The information is ACK or NACK, the specific steps of this example are as follows:

[0114] Step 201: After the network element 2 sends data, it waits for an explicit signaling instruction from the network element 1. The network element 2 receives the downlink message sent by the network element 1, and if the downlink message indicates that the HARQ feedback information of the MAC PDU in the HARQ buffer of the network element 2 is ACK, then enter step 202 . If the downlink message indicates that the HARQ feedback information of the MAC PDU in the HARQ buffer of the network element 2 is NACK, go to step 203 .

[0115] The downlink message is downlink control information DCI.

[011...

Embodiment 2

[0143] image 3 It is a flow chart of Embodiment 2 of the present invention. This embodiment adopts scheme 2 to implicitly indicate HARQ feedback information for network element 2, for example: the default HARQ feedback information is ACK, if the actual HARQ feedback information is NACK (different from the default Inconsistency), then network element 1 notifies network element 2 of the HARQ feedback information through explicit signaling in Embodiment 1. If the actual HARQ feedback information is ACK (consistent with the default one), network element 1 may optionally notify network element 2 of the HARQ feedback information through explicit signaling in Embodiment 1.

[0144] Step 301: If there is uplink authorization information indicating the first transmission, go to step 302; if there is uplink authorization information indicating the retransmission, go to step 303; if there is no uplink authorization information indicating the first transmission or retransmission, and HAR...

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Abstract

The invention discloses a data transmission method and a data transmission system, which are used for solving the technical problems of uplink transmission conflicts or uplink resource wasting under the condition of not introducing a relay-physical hybrid automatic repeat request indicator channel (R-PHICH) in a wireless relay network system. In the method and the system, a first network element explicitly and / or implicitly indicates hybrid automatic repeat request (HARQ) feedback information to a second network element; and the second network element transmits data or does not transmit the data according to the HARQ feedback information. By the method and the system, the data transmission conflicts are avoided, and resource scheduling needs are satisfied by an explicit and / or implicit indication way; and the R-PHICH is not required so as to avoid overhead in a Un interface resource configuration PHICH, reduce the signaling overhead of a relay-physical downlink control channel (R-PDCCH) for a Un interface, improve scheduling efficiency and increase the utilization rate of the resources.

Description

technical field [0001] The present invention relates to the communication field, in particular, to a data transmission method and system. Background technique [0002] E-UTRAN (Evolved Universal Terrestrial Radio Access Network, Evolved Universal Terrestrial Radio Access Network) in the third-generation mobile communication LTE (Long Term Evolution, long-term evolution) system supports hybrid automatic repeat request (Hybrid ARQ, HARQ) , used to improve the reliability of the successful transmission. [0003] The user terminal (UE) has a HARQ entity in the uplink, and the HARQ entity supports multiple HARQ processes and follows the parallel stop-and-wait protocol. [0004] Uplink retransmission is divided into two retransmission modes: adaptive and non-adaptive. Among them, adaptive retransmission means that the transmission parameters required for retransmission need to be indicated by the sender through signaling, that is, the base station (eNB) needs to be indicated by ...

Claims

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Application Information

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IPC IPC(8): H04L1/18H04L1/16
CPCH04L1/1867H04L2001/0097
Inventor 陈思
Owner ZTE CORP
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