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Generation method and user device for channel quality indication in the high-speed downlink packet access

A channel quality indication and channel quality technology, applied in digital transmission systems, error prevention, electrical components, etc., can solve the problems of large throughput deviation and low CQI reliability, and achieve the effect of improving reliability

Active Publication Date: 2009-10-21
ST ERICSSON SEMICON BEIJING
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Problems solved by technology

Since the channel quality always changes dynamically, this table can only roughly reflect the real resource situation, so the reliability of the CQI obtained by looking up the table is not high, which causes the actual throughput of data to deviate greatly from the ideal throughput.

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  • Generation method and user device for channel quality indication in the high-speed downlink packet access
  • Generation method and user device for channel quality indication in the high-speed downlink packet access
  • Generation method and user device for channel quality indication in the high-speed downlink packet access

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Embodiment Construction

[0048] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0049] The design idea of ​​the present invention is: after the UE receives the transport block, it measures the channel quality, generates the recommended transport block size according to the measured channel quality; and generates the recommended transport block size according to the generated recommended transport block size and the currently occupied code channel resources. modulation format. The solution of the present invention is applicable to but not limited to Time Division Synchronous Code Division Multiple Access (Time Division Synchronous CDMA, TD-SCDMA) system.

[0050] Please refer to figure 1 , which is a flowchart of a method for generating a recommended transport block size in high-speed downlink packet access according to an embo...

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Abstract

The invention discloses a method for generating CQI in HSDPA and user equipment. The method includes the steps: A. After the UE receives the transport block, measure the channel quality, and generate a recommended transport block size according to the measured channel quality; B. According to the generated recommended transport block size and the currently occupied code channel resources, Generates recommended modulation formats. Furthermore, when the channel quality changes greatly, the recommended transmission block size is generated by using a rough table lookup method. When the channel quality changes small, the number of correct transmission blocks and the number of error transmission blocks received are calculated, and gradual adjustments are made according to the calculation results. way to generate the recommended transport block size. The invention effectively improves the reliability of generated CQI, and makes the throughput of data transmission in HSDPA significantly improved.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a method for generating channel quality indicators in high-speed downlink packet access and user equipment. Background technique [0002] High Speed ​​Downlink Packet Access (HSDPA) is a high-speed data transmission technology, and the peak rate of downlink data can be greatly increased by using the HSDPA technology. HSDPA improves user communication by implementing several fast and complex channel control mechanisms, including physical layer short frame, adaptive coding and modulation (Adapt Modualtion Coding, AMC), fast hybrid automatic repeat request (HARQ) and fast scheduling technology. Experience with data download services. [0003] Among them, the main advantages of AMC are: users in a favorable position can get higher data rate, which improves the average throughput of the cell; it replaces the change of transmission power by changing the modulati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00
Inventor 李超
Owner ST ERICSSON SEMICON BEIJING
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