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A method and device for calculating the number of null bits in a pdsch channel

A bit number and channel technology, applied in the field of physical downlink shared channels

Active Publication Date: 2018-10-02
SANECHIPS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention provides a method and device for calculating the number of NULL bits in a PDSCH channel to solve the technical problem of how to quickly calculate the number of NULL bits in a PDSCH channel

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  • A method and device for calculating the number of null bits in a pdsch channel
  • A method and device for calculating the number of null bits in a pdsch channel
  • A method and device for calculating the number of null bits in a pdsch channel

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Embodiment Construction

[0038] In order to make the purpose, technical solution and advantages of the present invention more clear, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

[0039] figure 1 It is a flow chart of the method for calculating the number of NULL bits in the PDSCH channel in this embodiment.

[0040] S101 process starts;

[0041] S102 judges the length of the data sent through the cyclic buffer (BUFFER) after interleaving by the block interleaver and the length of the cyclic BUFFER, if the length of the data sent through the cyclic BUFFER after interleaving by the block interleaver is greater than the length of the cyclic BUFFER, then execute Step S106; otherwise, execute step S103;

[0042] According to common knowledge in this fie...

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Abstract

The invention provides a method and apparatus for calculating null bit number in physical downlink shared channel (PDSCH) channel. The method comprises the following steps that: if the length of data that are sent by circular buffer is less than length of the circular buffer after interleaving of a block interleaver, whether the last valid data sent by the circular buffer are located in a system bit zone or a detection bit zone in the circular buffer is determined; the position of the last valid data in the located zone is determined; and according to the position, the null bit number contained in the data sent by the circular buffer is calculated. According to the invention, rapid and simple calculation of the null bit number in the PDSCH channel is realized.

Description

technical field [0001] The invention relates to a physical downlink shared channel (PDSCH) of LTE, in particular to a method and a device for calculating the number of empty data (NULL) bits in the PDSCH channel. Background technique [0002] In the uplink of the mobile communication system, the encoding and multiplexing processing of the LTE TDD / FDD PDSCH channel mainly includes steps such as channel encoding, rate matching, interleaving, and transmission channel multiplexing. In 3GPPTS36.212, the above steps are given Specific provisions. [0003] Among them, the purpose of rate matching is to make the number of coded bits meet the number of bits that can be carried by the allocated PDSCH physical channel, and LTE needs to process a large amount of data, so it is very important to perform rate matching efficiently. The rate matching specified in the protocol includes: sub-block interleaving, bit collection, and bit selection and clipping. In sub-block interleaving, when ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00
Inventor 邓春华李爱军
Owner SANECHIPS TECH CO LTD