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Data caching method and device

A data cache and data technology, applied in the field of communication, can solve problems such as RLC layer protocol error service data protocol error detection, etc., to achieve the effect of ensuring accuracy and stability

Active Publication Date: 2017-11-14
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a data caching method and device to at least solve the problem in the related art that in the non-confirmation mode, the RLC layer protocol cannot detect the service data protocol error for the RLC layer protocol error caused by the HARQ function abnormality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] UMD PDUs with SN=0, 1, 2, 0, 1 are received sequentially, and the processing flow is as follows Figure 4 As shown, the specific information of the data is shown in Table 1:

[0064] Table 1 Data specific information table

[0065] UMDPDU SN

Air interface time for PDU reception

HARQ retransmission flag of the TB where the PDU is located

0

frame number 1, subframe number 1

new biography

1

Frame number 1, subframe number 2

new biography

2

Frame number 1, subframe number 3

new biography

0 (second)

Frame number 1, subframe number 5

Retransmission

1 (second)

Frame number 1, subframe number 6

new biography

[0066] The initial reordering window is [16, 0), and the SNs of the first three UMD PDUs received in sequence are 0, 1, and 2 respectively, and the rules described in 3 and 5a above are applied to judge the processing, specifically: since SN= The UMD PDU with 0 is the first rece...

Embodiment 2

[0070] The UMDPDUs with SN=0, 2, 1, and 2 are received sequentially, and the processing flow is as follows Figure 5 As shown, the specific information of the data is shown in Table 2:

[0071] Table 2 Data specific information table

[0072] UMDPDU SN

Air interface time for PDU reception

HARQ retransmission flag of the TB where the PDU is located

0

frame number 1, subframe number 1

new biography

2

Frame number 1, subframe number 2

new or retransmit

1

Frame number 1, subframe number 3

new biography

2 (second)

Frame number 1, subframe number 5

new biography

[0073] The initial reordering window is [16, 0). For the first received UMD PDU with SN=0, only its air interface time and HARQ retransmission flag are recorded, and put into the cache, without abnormal judgment.

[0074] The first received UMD PDU with SN=2 applies the rules described in 5a above to judge and process it. The minimum time inter...

Embodiment 3

[0078] The UMDPDUs with SN=0, 3, 1, and 2 are received sequentially, and the processing flow is as follows Image 6 As shown, the specific information of the data is shown in Table 3:

[0079] Table 3 data specific information table

[0080] UMD PDU SN

Air interface time for PDU reception

HARQ retransmission flag of the TB where the PDU is located

0

frame number 1, subframe number 1

new biography

3

Frame number 1, subframe number 4

new biography

1

Frame number 1, subframe number 6

Retransmission

2

Frame number 1, subframe number 7

new biography

[0081] The initial reordering window is [16, 0). For the first received UMDPDU with SN=0, only the air interface time and HARQ retransmission flag are recorded, and put into the cache without exception judgment. At this time, the reordering window is [17, 1).

[0082] The received UMD PDU with SN=3 applies the rules described in 5a above to determine the p...

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Abstract

The invention discloses a data caching method and device. The method includes: obtaining the air interface time of receiving data and the HARQ flag of the transmission block corresponding to the data; and determining whether to cache the data according to the air interface time and the HARQ flag. Through the air interface time of receiving data and the HARQ flag, it is determined whether to cache the data or discard the data, combined with the HARQ mechanism of the physical layer and the RLC layer to complete the error detection of the protocol data in the non-confirmation mode, ensuring the accuracy and stability of data transmission .

Description

technical field [0001] The present invention relates to the communication field, in particular, to a data caching method and device. Background technique [0002] The Radio Link Control (RLC for short) layer is located above the Media Access Control (MAC for short) layer in the wireless interface protocol stack of the Long Term Evolution (LTE for short), and the packet data Below the Packet Data Convergence Protocol (PDCP) layer. The main functions of the RLC protocol layer include the transmission of user data and control data, data fragmentation, reassembly, and retransmission, detection of duplicate data, and protocol error detection. The RLC entity has three modes, namely: Transparent Mode (Transparent Mode, TM for short), Unacknowledged Mode (UM for short), and Acknowledged Mode (AM for short). [0003] The description of the protocol error detection function in the RLC protocol only limits the confirmation mode, but for the non-confirmation mode, the protocol does no...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/18
Inventor 张彤
Owner ZTE CORP