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Uplink data transmission method and device

A data transmission method and technology of a data transmission device are applied in digital transmission systems, transmission systems, transmission data organization to avoid errors and other directions, can solve problems such as resource waste, and achieve the effect of avoiding resource waste.

Inactive Publication Date: 2013-06-05
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the related technology, after the UE transmits the last packet of data in the cache, the eNB feeds back an ACK and a new data packet authorization to the UE, but since the UE has no data to send, it will cause a waste of resources. To this end, the present invention provides an uplink data transmission method and device to at least solve the above problems

Method used

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  • Uplink data transmission method and device

Examples

Experimental program
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Effect test

Embodiment 1

[0049] The UE will send the last packet of data of the service link, and the MAC subheader is a 7-bit length field.

[0050] image 3 It is a flow chart of the uplink data transmission method according to the preferred embodiment 1 of the present invention, such as image 3 As shown, the following steps S302 to S308 are included.

[0051] In step S302, the UE sets the first reserved bit of the MAC subheader to 1 when transmitting the last data packet in the cache.

[0052] Step S304, after successfully receiving the data, the eNB checks the reserved bits of the MAC sub-header, and finds that the first reserved bit is 1, then considers the data packet to be the last data packet of the service.

[0053] In step S306, the eNB feeds back only one ACK.

[0054] Step S308, when the UE receives an ACK after sending the last packet of data, it considers that the packet of data has been received correctly, and the transmission of the service is completed.

Embodiment 2

[0056] The UE will send the last packet of data of the service link, and the MAC subheader is a 15-bit length field.

[0057] Figure 4 It is a flow chart of the uplink data transmission method according to the second preferred embodiment of the present invention, such as Figure 4 As shown, the following steps S402 to S408 are included.

[0058] In step S402, the UE sets the first reserved bit of the MAC subheader to 1 when transmitting the last data packet in the buffer.

[0059] Step S404, after successfully receiving the data, the eNB checks the reserved bits of the MAC sub-header, and finds that the first reserved bit is 1, then considers the data packet to be the last data packet of the service.

[0060] In step S406, the eNB feeds back only one ACK.

[0061] Step S408, when the UE receives an ACK after sending the last packet of data, it considers that the packet of data has been received correctly, and the transmission of the service is completed.

Embodiment 3

[0063] The UE will send the last packet of data of the service link, and the MAC subheader has no length field.

[0064] Figure 5 It is a flow chart of the uplink data transmission method according to the third preferred embodiment of the present invention, such as Figure 5 As shown, the following steps S502 to S508 are included.

[0065] In step S502, the UE sets the first reserved bit of the MAC subheader to 1 when transmitting the last data packet in the buffer.

[0066] Step S504, after successfully receiving the data, the eNB checks the reserved bits of the MAC sub-header, and finds that the first reserved bit is 1, then considers the data packet to be the last data packet of the service.

[0067] In step S506, the eNB feeds back only one ACK.

[0068] Step S508, when the UE receives an ACK after sending the last packet of data, it considers that the packet of data has been received correctly, and the transmission of the service is completed.

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Abstract

The invention discloses an uplink data transmission method and a device. The method includes that user equipment (UE) determines that uplink data to be sent is the last pack of data in the UE cache; a logo is added in the uplink data to be sent, wherein the logo is used for indicating that the uplink data to be sent are the last pack of data in the UE cache; the uplink data to be sent is sent to effective noise bandwidth (eNB). The method can avoid the authorization of the eNB for the UE feedback new data packets after the last pack of the data is transmitted in the UE cache, and the waste of resources is further avoided.

Description

technical field [0001] The present invention relates to the communication field, in particular to an uplink data transmission method and device. Background technique [0002] In the Long-Term Evolution (referred to as LTE) system, the uplink transmission mechanism stipulates that when the user equipment (User Equipment, referred to as UE) sends a packet of uplink data, the downlink subframe with fixed timing offset Detecting the transmission of an acknowledgment / non-acknowledgment (ACK / NACK) of the packet data to determine whether the packet data is transmitted correctly. [0003] 1) If the UE detects an ACK and an authorization of a new uplink data packet on a downlink subframe with a fixed timing offset, the UE considers that the data transmission of the previous packet is correct, and it can be deleted correctly in the buffer Transmitted data packets, for the transmission of new data packets. [0004] 2) If the UE detects a NACK and an uplink retransmission grant on a d...

Claims

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Application Information

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IPC IPC(8): H04L1/16
CPCH04L1/16H04L1/1887H04L1/1896H04L1/0083H04L1/009
Inventor 褚丽莉王新台
Owner ZTE CORP
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