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Method and apparatus for rate de-matching

A de-rate-matching and rate-matching technology, applied in error prevention/detection using return channel, digital transmission system, error prevention, etc., can solve problems such as large buffer storage space, and achieve the effect of saving quantity

Inactive Publication Date: 2013-12-04
MARVELL INT LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, in the prior art, especially in the LTE system, the rate matching method used on the user equipment side usually needs multiple cycles (cycles) to complete the processing of one soft bit (SB), and requires a large of buffer memory

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Embodiment Construction

[0020] Various exemplary embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0021] It should be understood that these exemplary embodiments are given only to enable those skilled in the art to better understand and realize the present invention, but not to limit the scope of the present invention in any way.

[0022] The specific process of rate matching has been specified in 3GPP TS36.212, figure 1 shows a schematic diagram of performing rate matching on a Turbo coded transmission channel in the prior art, and figure 2 A schematic diagram showing each bit position before and after performing rate matching on the LTE PDSCH.

[0023] The following reference figure 1 with figure 2 To describe the process of performing rate matching on the data to be transmitted at the base station side. Such as figure 2 As shown, on the base station side, the original data code block to be transmitted is divided into three ...

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Abstract

Embodiments of the invention provide a method and an apparatus for rate de-matching. The method comprises the steps of receiving encoded data stream after being rate matched; caching the encoded data stream after being rate matched in a buffer memory; reading one or more bits from the buffer memory in every period; calculating corresponding addresses of the one or more bits in the data stream before the encoded data stream being rate matched; and storing the one or more bits in a last stage memory based on the calculated addresses.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to US Provisional Application No. 61 / 635,665, filed April 19, 2012, the disclosure of which is hereby incorporated by reference in its entirety. technical field [0003] Embodiments of the present invention generally relate to rate matching techniques in a communication system, and more particularly, relate to a method and apparatus for de-rate matching used by a user equipment in a long-term evolution (LTE) system. Background technique [0004] LTE is the evolution of the third generation mobile communication (3G) technology, which improves and enhances the air access technology of 3G. The Hybrid Automatic Repeat Request (HARQ) technology is adopted in the LTE system to ensure the quality of service (QoS) requirements, further improving the reliability of data transmission. [0005] In an existing mobile communication system, in order to make the transmission channel match the carryi...

Claims

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Application Information

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IPC IPC(8): H04L1/00H04L1/18
Inventor 沈立芸许若圣刘虎董亮
Owner MARVELL INT LTD
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