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Method and device for acquiring CQI (Channel Quality Indicator) information

An acquisition method and device technology, applied in wireless communication, electrical components, and error prevention/detection through diversity reception, can solve problems such as reducing feedback delay, occupying system resources, and complex processing, avoiding CQI delay, The effect of shortening CQI delay and ensuring communication performance

Inactive Publication Date: 2011-05-18
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0024] First, the CQI-request HS-SCCH will occupy certain system resources, not only occupying the transmission power of the downlink time slot, but also occupying certain code channel resources
[0025] On the other hand, after receiving the CQI-request HS-SCCH, the terminal device needs to perform a series of operations such as demodulation, decoding, deinterleaving, derate matching, and CRC check. The processing is relatively complicated and cannot effectively shorten the corresponding The processing time reduces the feedback delay

Method used

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  • Method and device for acquiring CQI (Channel Quality Indicator) information
  • Method and device for acquiring CQI (Channel Quality Indicator) information
  • Method and device for acquiring CQI (Channel Quality Indicator) information

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0144] Such as Figure 4 As shown, it is a schematic flowchart of terminal equipment scheduling in the case that the standalone midamble signal is configured at UE level and its transmission is not combined with terminal equipment data scheduling proposed by the embodiment of the present invention.

[0145] In this embodiment, the mode in which the transmission of the standalone midamble signal is not combined with the data scheduling of the terminal equipment refers to the timing at which the standalone midamble signal is randomly transmitted or sent in turn among the terminal equipment, but is not bound to the data scheduling relation.

[0146] In step S401, the base station judges whether the number of terminal devices currently to be scheduled is greater than a preset threshold.

[0147] When the number of terminal devices to be scheduled is small, the base station does not need to enable the CQI measurement mode based on the standalone midamble signal, that is, the base ...

Embodiment 2

[0163] like Figure 5 As shown in FIG. 1 , it is a schematic flowchart of terminal device scheduling in the case that a standalone midamble signal is sent to a corresponding terminal device based on a time division multiplexing method proposed by an embodiment of the present invention.

[0164] In this embodiment, multiple standalone midamble signals are time-division multiplexed among multiple terminal devices. The cycle of time division multiplexing and the time offset value of each terminal device in the multiplexing cycle are notified by the terminal device.

[0165] In step S501, the base station judges whether the number of terminal devices currently to be scheduled is greater than a preset threshold.

[0166] When the number of terminal devices to be scheduled is small, the base station does not need to enable the CQI measurement mode based on the standalone midamble signal, that is, the base station does not need to send the downlink standalone midamble signal, and ca...

Embodiment 3

[0181] like Image 6 As shown, it is a schematic flowchart of terminal equipment scheduling in the case that the standalone midamble signal is configured at UE level and its transmission is combined with terminal equipment data scheduling proposed by the embodiment of the present invention.

[0182] In this embodiment, each terminal device is configured with a dedicated standalone midamble window, and the combination of the standalone midamble signal and data scheduling refers to specifying the advance of the sending time point of the standalone midamble signal relative to the time point of data scheduling for the terminal device Using this amount of advance, the base station can just complete the acquisition of the latest CQI information of the terminal device through the CQI measurement mode based on the standalone midamble signal before scheduling data for the terminal device, thus minimizing the CQI feedback time extended purpose.

[0183] Wherein, the above-mentioned adv...

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Abstract

The embodiment of the invention discloses a method and a device for acquiring CQI (Channel Quality Indicator) information. By applying the technical scheme provided by the embodiment of the invention, a base station sends a downlink sounding signal to a terminal device according to a certain policy to trigger the channel quality detection of the terminal device, so that the accurate CQI information of the terminal device can be acquired timely, easily and conveniently, the timeliness of CQI information updating can be increased, and too large CQI time delay caused by too long time interval between two adjacent dispatches on the same terminal device can be avoided. Therefore, the CQI time delay is shortened, the accuracy of channel estimation in the dispatching process of the terminal device is increased, and the communication performance of a system is ensured.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method and equipment for acquiring CQI information. Background technique [0002] In a wireless mobile communication system, when the system has downlink data to be sent, the Node B (Node B, that is, the base station) first shares the control channel in the downlink, such as: HS-SCCH (High Speed ​​Shared Control Channel, high-speed shared control channel), and sends Downlink scheduling and control information, indicating to the UE (User Equipment, user equipment) that the system sends HSDPA (High Speed ​​Downlink Packet Access, high-speed downlink packet access) on a subsequent HS-PDSCH (High Speed ​​Physical Downlink Shared Channel, high-speed physical downlink shared channel) resource ) data, for example: Node B sends downlink scheduling and control information. [0003] The UE obtains information such as the time slot and code channel required to receive the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/06H04W24/08
Inventor 徐伟杰杨宇邢艳萍
Owner DATANG MOBILE COMM EQUIP CO LTD
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