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Hybrid retransmission method

A technology of hybrid retransmission and packet retransmission, applied in the field of hybrid retransmission, can solve the problem of inability to balance throughput and system overhead, and achieve the effect of reducing system overhead and making full use of system resources

Active Publication Date: 2015-01-21
POTEVIO INFORMATION TECH
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Problems solved by technology

[0010] Therefore, for both TB-based and CB-based retransmission methods, although the former can minimize system throughput, that is, minimize system overhead, the latter can maximize system throughput, that is, system Maximize overhead, but can't strike a balance between throughput and system overhead

Method used

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Embodiment Construction

[0036] In order to make the object, technical solution and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0037] In the embodiment of the present invention, firstly, the code blocks in the retransmission data are grouped, and the retransmission mode is determined according to the number L of groups. After the CB packet retransmission mode is selected, only the code blocks of the packet with errors are transmitted during retransmission, and the ACK / NACK feedback is simplified from the ACK / NACK of all code blocks to the ACK / NACK of each group. In this way, on the premise of ensuring the system throughput, the system overhead can be reduced, and the system resources can be fully utilized.

[0038] Attached below Figure 4 Describe technical scheme of the present invention in detail, specifically comprise the following steps:

[0039] 401. ...

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Abstract

The invention discloses a hybrid retransmission method. The method comprises the following steps: transmitting data comprising all code blocks (CB) by adopting a transmission block (TB) retransmission way; during data retransmission, dividing retransmission data into L groups according to a packet length M, and putting the CBs left after grouping into a last group, wherein the M is greater than or equal to 1, and is smaller than or equal to a preset maximum value; and determining a TB retransmission way or a CB packet retransmission way according to the L. After application of the hybrid retransmission method, the system overhead can be reduced on the premise of ensuring system throughput, and system resources are fully utilized.

Description

technical field [0001] The present application relates to the technical field of communications, and more specifically, to a hybrid retransmission method. Background technique [0002] Hybrid automatic repeat request (HARQ) technology is an error control method that combines automatic repeat request (ARQ) technology and forward error correction code (FEC) technology. At present, in the HARQ retransmission technology of wireless communication standards such as LTE, for each user, if the initial transmission is wrong, the transmission block (TB) based on the transmission block size is used for data retransmission. [0003] For example, in the LTE system, if the number of bits in the transport block TB is greater than the maximum size of 6144 bits of Turbo coded input bits specified in the LTE protocol, the code block (CB) segmentation process is performed on the transport block, and each segmented The code blocks do CRC encoding (such as figure 1 shown). [0004] In princip...

Claims

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Application Information

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IPC IPC(8): H04L1/18
CPCH04L1/1812
Inventor 郑辰
Owner POTEVIO INFORMATION TECH
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